| File: | dev/pci/drm/display/drm_dp_mst_topology.c |
| Warning: | line 2556, column 30 The left operand of '>>' is a garbage value |
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| 1 | /* | |||
| 2 | * Copyright © 2014 Red Hat | |||
| 3 | * | |||
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its | |||
| 5 | * documentation for any purpose is hereby granted without fee, provided that | |||
| 6 | * the above copyright notice appear in all copies and that both that copyright | |||
| 7 | * notice and this permission notice appear in supporting documentation, and | |||
| 8 | * that the name of the copyright holders not be used in advertising or | |||
| 9 | * publicity pertaining to distribution of the software without specific, | |||
| 10 | * written prior permission. The copyright holders make no representations | |||
| 11 | * about the suitability of this software for any purpose. It is provided "as | |||
| 12 | * is" without express or implied warranty. | |||
| 13 | * | |||
| 14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |||
| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |||
| 16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |||
| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |||
| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |||
| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |||
| 20 | * OF THIS SOFTWARE. | |||
| 21 | */ | |||
| 22 | ||||
| 23 | #include <linux/bitfield.h> | |||
| 24 | #include <linux/delay.h> | |||
| 25 | #include <linux/errno.h> | |||
| 26 | #include <linux/i2c.h> | |||
| 27 | #include <linux/init.h> | |||
| 28 | #include <linux/kernel.h> | |||
| 29 | #include <linux/random.h> | |||
| 30 | #include <linux/sched.h> | |||
| 31 | #include <linux/seq_file.h> | |||
| 32 | #include <linux/iopoll.h> | |||
| 33 | ||||
| 34 | #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)0 | |||
| 35 | #include <linux/stacktrace.h> | |||
| 36 | #include <linux/sort.h> | |||
| 37 | #include <linux/timekeeping.h> | |||
| 38 | #include <linux/math64.h> | |||
| 39 | #endif | |||
| 40 | ||||
| 41 | #include <drm/display/drm_dp_mst_helper.h> | |||
| 42 | #include <drm/drm_atomic.h> | |||
| 43 | #include <drm/drm_atomic_helper.h> | |||
| 44 | #include <drm/drm_drv.h> | |||
| 45 | #include <drm/drm_edid.h> | |||
| 46 | #include <drm/drm_print.h> | |||
| 47 | #include <drm/drm_probe_helper.h> | |||
| 48 | ||||
| 49 | #include "drm_dp_helper_internal.h" | |||
| 50 | #include "drm_dp_mst_topology_internal.h" | |||
| 51 | ||||
| 52 | /** | |||
| 53 | * DOC: dp mst helper | |||
| 54 | * | |||
| 55 | * These functions contain parts of the DisplayPort 1.2a MultiStream Transport | |||
| 56 | * protocol. The helpers contain a topology manager and bandwidth manager. | |||
| 57 | * The helpers encapsulate the sending and received of sideband msgs. | |||
| 58 | */ | |||
| 59 | struct drm_dp_pending_up_req { | |||
| 60 | struct drm_dp_sideband_msg_hdr hdr; | |||
| 61 | struct drm_dp_sideband_msg_req_body msg; | |||
| 62 | struct list_head next; | |||
| 63 | }; | |||
| 64 | ||||
| 65 | static bool_Bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, | |||
| 66 | char *buf); | |||
| 67 | ||||
| 68 | static void drm_dp_mst_topology_put_port(struct drm_dp_mst_port *port); | |||
| 69 | ||||
| 70 | static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, | |||
| 71 | int id, u8 start_slot, u8 num_slots); | |||
| 72 | ||||
| 73 | static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr, | |||
| 74 | struct drm_dp_mst_port *port, | |||
| 75 | int offset, int size, u8 *bytes); | |||
| 76 | static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, | |||
| 77 | struct drm_dp_mst_port *port, | |||
| 78 | int offset, int size, u8 *bytes); | |||
| 79 | ||||
| 80 | static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, | |||
| 81 | struct drm_dp_mst_branch *mstb); | |||
| 82 | ||||
| 83 | static void | |||
| 84 | drm_dp_send_clear_payload_id_table(struct drm_dp_mst_topology_mgr *mgr, | |||
| 85 | struct drm_dp_mst_branch *mstb); | |||
| 86 | ||||
| 87 | static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, | |||
| 88 | struct drm_dp_mst_branch *mstb, | |||
| 89 | struct drm_dp_mst_port *port); | |||
| 90 | static bool_Bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, | |||
| 91 | u8 *guid); | |||
| 92 | ||||
| 93 | static int drm_dp_mst_register_i2c_bus(struct drm_dp_mst_port *port); | |||
| 94 | static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_mst_port *port); | |||
| 95 | static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr); | |||
| 96 | ||||
| 97 | static bool_Bool drm_dp_mst_port_downstream_of_branch(struct drm_dp_mst_port *port, | |||
| 98 | struct drm_dp_mst_branch *branch); | |||
| 99 | ||||
| 100 | #define DBG_PREFIX"[dp_mst]" "[dp_mst]" | |||
| 101 | ||||
| 102 | #define DP_STR(x)[DRM_DP_SIDEBAND_TX_x] = "x" [DP_ ## x] = #x | |||
| 103 | ||||
| 104 | static const char *drm_dp_mst_req_type_str(u8 req_type) | |||
| 105 | { | |||
| 106 | static const char * const req_type_str[] = { | |||
| 107 | DP_STR(GET_MSG_TRANSACTION_VERSION)[DRM_DP_SIDEBAND_TX_GET_MSG_TRANSACTION_VERSION] = "GET_MSG_TRANSACTION_VERSION", | |||
| 108 | DP_STR(LINK_ADDRESS)[DRM_DP_SIDEBAND_TX_LINK_ADDRESS] = "LINK_ADDRESS", | |||
| 109 | DP_STR(CONNECTION_STATUS_NOTIFY)[DRM_DP_SIDEBAND_TX_CONNECTION_STATUS_NOTIFY] = "CONNECTION_STATUS_NOTIFY", | |||
| 110 | DP_STR(ENUM_PATH_RESOURCES)[DRM_DP_SIDEBAND_TX_ENUM_PATH_RESOURCES] = "ENUM_PATH_RESOURCES", | |||
| 111 | DP_STR(ALLOCATE_PAYLOAD)[DRM_DP_SIDEBAND_TX_ALLOCATE_PAYLOAD] = "ALLOCATE_PAYLOAD", | |||
| 112 | DP_STR(QUERY_PAYLOAD)[DRM_DP_SIDEBAND_TX_QUERY_PAYLOAD] = "QUERY_PAYLOAD", | |||
| 113 | DP_STR(RESOURCE_STATUS_NOTIFY)[DRM_DP_SIDEBAND_TX_RESOURCE_STATUS_NOTIFY] = "RESOURCE_STATUS_NOTIFY", | |||
| 114 | DP_STR(CLEAR_PAYLOAD_ID_TABLE)[DRM_DP_SIDEBAND_TX_CLEAR_PAYLOAD_ID_TABLE] = "CLEAR_PAYLOAD_ID_TABLE", | |||
| 115 | DP_STR(REMOTE_DPCD_READ)[DRM_DP_SIDEBAND_TX_REMOTE_DPCD_READ] = "REMOTE_DPCD_READ", | |||
| 116 | DP_STR(REMOTE_DPCD_WRITE)[DRM_DP_SIDEBAND_TX_REMOTE_DPCD_WRITE] = "REMOTE_DPCD_WRITE", | |||
| 117 | DP_STR(REMOTE_I2C_READ)[DRM_DP_SIDEBAND_TX_REMOTE_I2C_READ] = "REMOTE_I2C_READ", | |||
| 118 | DP_STR(REMOTE_I2C_WRITE)[DRM_DP_SIDEBAND_TX_REMOTE_I2C_WRITE] = "REMOTE_I2C_WRITE", | |||
| 119 | DP_STR(POWER_UP_PHY)[DRM_DP_SIDEBAND_TX_POWER_UP_PHY] = "POWER_UP_PHY", | |||
| 120 | DP_STR(POWER_DOWN_PHY)[DRM_DP_SIDEBAND_TX_POWER_DOWN_PHY] = "POWER_DOWN_PHY", | |||
| 121 | DP_STR(SINK_EVENT_NOTIFY)[DRM_DP_SIDEBAND_TX_SINK_EVENT_NOTIFY] = "SINK_EVENT_NOTIFY", | |||
| 122 | DP_STR(QUERY_STREAM_ENC_STATUS)[DRM_DP_SIDEBAND_TX_QUERY_STREAM_ENC_STATUS] = "QUERY_STREAM_ENC_STATUS", | |||
| 123 | }; | |||
| 124 | ||||
| 125 | if (req_type >= ARRAY_SIZE(req_type_str)(sizeof((req_type_str)) / sizeof((req_type_str)[0])) || | |||
| 126 | !req_type_str[req_type]) | |||
| 127 | return "unknown"; | |||
| 128 | ||||
| 129 | return req_type_str[req_type]; | |||
| 130 | } | |||
| 131 | ||||
| 132 | #undef DP_STR | |||
| 133 | #define DP_STR(x)[DRM_DP_SIDEBAND_TX_x] = "x" [DP_NAK_ ## x] = #x | |||
| 134 | ||||
| 135 | static const char *drm_dp_mst_nak_reason_str(u8 nak_reason) | |||
| 136 | { | |||
| 137 | static const char * const nak_reason_str[] = { | |||
| 138 | DP_STR(WRITE_FAILURE)[DRM_DP_SIDEBAND_TX_WRITE_FAILURE] = "WRITE_FAILURE", | |||
| 139 | DP_STR(INVALID_READ)[DRM_DP_SIDEBAND_TX_INVALID_READ] = "INVALID_READ", | |||
| 140 | DP_STR(CRC_FAILURE)[DRM_DP_SIDEBAND_TX_CRC_FAILURE] = "CRC_FAILURE", | |||
| 141 | DP_STR(BAD_PARAM)[DRM_DP_SIDEBAND_TX_BAD_PARAM] = "BAD_PARAM", | |||
| 142 | DP_STR(DEFER)[DRM_DP_SIDEBAND_TX_DEFER] = "DEFER", | |||
| 143 | DP_STR(LINK_FAILURE)[DRM_DP_SIDEBAND_TX_LINK_FAILURE] = "LINK_FAILURE", | |||
| 144 | DP_STR(NO_RESOURCES)[DRM_DP_SIDEBAND_TX_NO_RESOURCES] = "NO_RESOURCES", | |||
| 145 | DP_STR(DPCD_FAIL)[DRM_DP_SIDEBAND_TX_DPCD_FAIL] = "DPCD_FAIL", | |||
| 146 | DP_STR(I2C_NAK)[DRM_DP_SIDEBAND_TX_I2C_NAK] = "I2C_NAK", | |||
| 147 | DP_STR(ALLOCATE_FAIL)[DRM_DP_SIDEBAND_TX_ALLOCATE_FAIL] = "ALLOCATE_FAIL", | |||
| 148 | }; | |||
| 149 | ||||
| 150 | if (nak_reason >= ARRAY_SIZE(nak_reason_str)(sizeof((nak_reason_str)) / sizeof((nak_reason_str)[0])) || | |||
| 151 | !nak_reason_str[nak_reason]) | |||
| 152 | return "unknown"; | |||
| 153 | ||||
| 154 | return nak_reason_str[nak_reason]; | |||
| 155 | } | |||
| 156 | ||||
| 157 | #undef DP_STR | |||
| 158 | #define DP_STR(x)[DRM_DP_SIDEBAND_TX_x] = "x" [DRM_DP_SIDEBAND_TX_ ## x] = #x | |||
| 159 | ||||
| 160 | static const char *drm_dp_mst_sideband_tx_state_str(int state) | |||
| 161 | { | |||
| 162 | static const char * const sideband_reason_str[] = { | |||
| 163 | DP_STR(QUEUED)[0] = "QUEUED", | |||
| 164 | DP_STR(START_SEND)[1] = "START_SEND", | |||
| 165 | DP_STR(SENT)[2] = "SENT", | |||
| 166 | DP_STR(RX)[3] = "RX", | |||
| 167 | DP_STR(TIMEOUT)[4] = "TIMEOUT", | |||
| 168 | }; | |||
| 169 | ||||
| 170 | if (state >= ARRAY_SIZE(sideband_reason_str)(sizeof((sideband_reason_str)) / sizeof((sideband_reason_str) [0])) || | |||
| 171 | !sideband_reason_str[state]) | |||
| 172 | return "unknown"; | |||
| 173 | ||||
| 174 | return sideband_reason_str[state]; | |||
| 175 | } | |||
| 176 | ||||
| 177 | static int | |||
| 178 | drm_dp_mst_rad_to_str(const u8 rad[8], u8 lct, char *out, size_t len) | |||
| 179 | { | |||
| 180 | int i; | |||
| 181 | u8 unpacked_rad[16]; | |||
| 182 | ||||
| 183 | for (i = 0; i < lct; i++) { | |||
| 184 | if (i % 2) | |||
| 185 | unpacked_rad[i] = rad[i / 2] >> 4; | |||
| 186 | else | |||
| 187 | unpacked_rad[i] = rad[i / 2] & BIT_MASK(4)(1UL << ((4) % 64)); | |||
| 188 | } | |||
| 189 | ||||
| 190 | /* TODO: Eventually add something to printk so we can format the rad | |||
| 191 | * like this: 1.2.3 | |||
| 192 | */ | |||
| 193 | return snprintf(out, len, "%*phC", lct, unpacked_rad); | |||
| 194 | } | |||
| 195 | ||||
| 196 | /* sideband msg handling */ | |||
| 197 | static u8 drm_dp_msg_header_crc4(const uint8_t *data, size_t num_nibbles) | |||
| 198 | { | |||
| 199 | u8 bitmask = 0x80; | |||
| 200 | u8 bitshift = 7; | |||
| 201 | u8 array_index = 0; | |||
| 202 | int number_of_bits = num_nibbles * 4; | |||
| 203 | u8 remainder = 0; | |||
| 204 | ||||
| 205 | while (number_of_bits != 0) { | |||
| 206 | number_of_bits--; | |||
| 207 | remainder <<= 1; | |||
| 208 | remainder |= (data[array_index] & bitmask) >> bitshift; | |||
| 209 | bitmask >>= 1; | |||
| 210 | bitshift--; | |||
| 211 | if (bitmask == 0) { | |||
| 212 | bitmask = 0x80; | |||
| 213 | bitshift = 7; | |||
| 214 | array_index++; | |||
| 215 | } | |||
| 216 | if ((remainder & 0x10) == 0x10) | |||
| 217 | remainder ^= 0x13; | |||
| 218 | } | |||
| 219 | ||||
| 220 | number_of_bits = 4; | |||
| 221 | while (number_of_bits != 0) { | |||
| 222 | number_of_bits--; | |||
| 223 | remainder <<= 1; | |||
| 224 | if ((remainder & 0x10) != 0) | |||
| 225 | remainder ^= 0x13; | |||
| 226 | } | |||
| 227 | ||||
| 228 | return remainder; | |||
| 229 | } | |||
| 230 | ||||
| 231 | static u8 drm_dp_msg_data_crc4(const uint8_t *data, u8 number_of_bytes) | |||
| 232 | { | |||
| 233 | u8 bitmask = 0x80; | |||
| 234 | u8 bitshift = 7; | |||
| 235 | u8 array_index = 0; | |||
| 236 | int number_of_bits = number_of_bytes * 8; | |||
| 237 | u16 remainder = 0; | |||
| 238 | ||||
| 239 | while (number_of_bits != 0) { | |||
| 240 | number_of_bits--; | |||
| 241 | remainder <<= 1; | |||
| 242 | remainder |= (data[array_index] & bitmask) >> bitshift; | |||
| 243 | bitmask >>= 1; | |||
| 244 | bitshift--; | |||
| 245 | if (bitmask == 0) { | |||
| 246 | bitmask = 0x80; | |||
| 247 | bitshift = 7; | |||
| 248 | array_index++; | |||
| 249 | } | |||
| 250 | if ((remainder & 0x100) == 0x100) | |||
| 251 | remainder ^= 0xd5; | |||
| 252 | } | |||
| 253 | ||||
| 254 | number_of_bits = 8; | |||
| 255 | while (number_of_bits != 0) { | |||
| 256 | number_of_bits--; | |||
| 257 | remainder <<= 1; | |||
| 258 | if ((remainder & 0x100) != 0) | |||
| 259 | remainder ^= 0xd5; | |||
| 260 | } | |||
| 261 | ||||
| 262 | return remainder & 0xff; | |||
| 263 | } | |||
| 264 | static inline u8 drm_dp_calc_sb_hdr_size(struct drm_dp_sideband_msg_hdr *hdr) | |||
| 265 | { | |||
| 266 | u8 size = 3; | |||
| 267 | ||||
| 268 | size += (hdr->lct / 2); | |||
| 269 | return size; | |||
| 270 | } | |||
| 271 | ||||
| 272 | static void drm_dp_encode_sideband_msg_hdr(struct drm_dp_sideband_msg_hdr *hdr, | |||
| 273 | u8 *buf, int *len) | |||
| 274 | { | |||
| 275 | int idx = 0; | |||
| 276 | int i; | |||
| 277 | u8 crc4; | |||
| 278 | ||||
| 279 | buf[idx++] = ((hdr->lct & 0xf) << 4) | (hdr->lcr & 0xf); | |||
| 280 | for (i = 0; i < (hdr->lct / 2); i++) | |||
| 281 | buf[idx++] = hdr->rad[i]; | |||
| 282 | buf[idx++] = (hdr->broadcast << 7) | (hdr->path_msg << 6) | | |||
| 283 | (hdr->msg_len & 0x3f); | |||
| 284 | buf[idx++] = (hdr->somt << 7) | (hdr->eomt << 6) | (hdr->seqno << 4); | |||
| 285 | ||||
| 286 | crc4 = drm_dp_msg_header_crc4(buf, (idx * 2) - 1); | |||
| 287 | buf[idx - 1] |= (crc4 & 0xf); | |||
| 288 | ||||
| 289 | *len = idx; | |||
| 290 | } | |||
| 291 | ||||
| 292 | static bool_Bool drm_dp_decode_sideband_msg_hdr(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 293 | struct drm_dp_sideband_msg_hdr *hdr, | |||
| 294 | u8 *buf, int buflen, u8 *hdrlen) | |||
| 295 | { | |||
| 296 | u8 crc4; | |||
| 297 | u8 len; | |||
| 298 | int i; | |||
| 299 | u8 idx; | |||
| 300 | ||||
| 301 | if (buf[0] == 0) | |||
| 302 | return false0; | |||
| 303 | len = 3; | |||
| 304 | len += ((buf[0] & 0xf0) >> 4) / 2; | |||
| 305 | if (len > buflen) | |||
| 306 | return false0; | |||
| 307 | crc4 = drm_dp_msg_header_crc4(buf, (len * 2) - 1); | |||
| 308 | ||||
| 309 | if ((crc4 & 0xf) != (buf[len - 1] & 0xf)) { | |||
| 310 | drm_dbg_kms(mgr->dev, "crc4 mismatch 0x%x 0x%x\n", crc4, buf[len - 1])__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "crc4 mismatch 0x%x 0x%x\n", crc4 , buf[len - 1]); | |||
| 311 | return false0; | |||
| 312 | } | |||
| 313 | ||||
| 314 | hdr->lct = (buf[0] & 0xf0) >> 4; | |||
| 315 | hdr->lcr = (buf[0] & 0xf); | |||
| 316 | idx = 1; | |||
| 317 | for (i = 0; i < (hdr->lct / 2); i++) | |||
| 318 | hdr->rad[i] = buf[idx++]; | |||
| 319 | hdr->broadcast = (buf[idx] >> 7) & 0x1; | |||
| 320 | hdr->path_msg = (buf[idx] >> 6) & 0x1; | |||
| 321 | hdr->msg_len = buf[idx] & 0x3f; | |||
| 322 | idx++; | |||
| 323 | hdr->somt = (buf[idx] >> 7) & 0x1; | |||
| 324 | hdr->eomt = (buf[idx] >> 6) & 0x1; | |||
| 325 | hdr->seqno = (buf[idx] >> 4) & 0x1; | |||
| 326 | idx++; | |||
| 327 | *hdrlen = idx; | |||
| 328 | return true1; | |||
| 329 | } | |||
| 330 | ||||
| 331 | void | |||
| 332 | drm_dp_encode_sideband_req(const struct drm_dp_sideband_msg_req_body *req, | |||
| 333 | struct drm_dp_sideband_msg_tx *raw) | |||
| 334 | { | |||
| 335 | int idx = 0; | |||
| 336 | int i; | |||
| 337 | u8 *buf = raw->msg; | |||
| 338 | ||||
| 339 | buf[idx++] = req->req_type & 0x7f; | |||
| 340 | ||||
| 341 | switch (req->req_type) { | |||
| 342 | case DP_ENUM_PATH_RESOURCES0x10: | |||
| 343 | case DP_POWER_DOWN_PHY0x25: | |||
| 344 | case DP_POWER_UP_PHY0x24: | |||
| 345 | buf[idx] = (req->u.port_num.port_number & 0xf) << 4; | |||
| 346 | idx++; | |||
| 347 | break; | |||
| 348 | case DP_ALLOCATE_PAYLOAD0x11: | |||
| 349 | buf[idx] = (req->u.allocate_payload.port_number & 0xf) << 4 | | |||
| 350 | (req->u.allocate_payload.number_sdp_streams & 0xf); | |||
| 351 | idx++; | |||
| 352 | buf[idx] = (req->u.allocate_payload.vcpi & 0x7f); | |||
| 353 | idx++; | |||
| 354 | buf[idx] = (req->u.allocate_payload.pbn >> 8); | |||
| 355 | idx++; | |||
| 356 | buf[idx] = (req->u.allocate_payload.pbn & 0xff); | |||
| 357 | idx++; | |||
| 358 | for (i = 0; i < req->u.allocate_payload.number_sdp_streams / 2; i++) { | |||
| 359 | buf[idx] = ((req->u.allocate_payload.sdp_stream_sink[i * 2] & 0xf) << 4) | | |||
| 360 | (req->u.allocate_payload.sdp_stream_sink[i * 2 + 1] & 0xf); | |||
| 361 | idx++; | |||
| 362 | } | |||
| 363 | if (req->u.allocate_payload.number_sdp_streams & 1) { | |||
| 364 | i = req->u.allocate_payload.number_sdp_streams - 1; | |||
| 365 | buf[idx] = (req->u.allocate_payload.sdp_stream_sink[i] & 0xf) << 4; | |||
| 366 | idx++; | |||
| 367 | } | |||
| 368 | break; | |||
| 369 | case DP_QUERY_PAYLOAD0x12: | |||
| 370 | buf[idx] = (req->u.query_payload.port_number & 0xf) << 4; | |||
| 371 | idx++; | |||
| 372 | buf[idx] = (req->u.query_payload.vcpi & 0x7f); | |||
| 373 | idx++; | |||
| 374 | break; | |||
| 375 | case DP_REMOTE_DPCD_READ0x20: | |||
| 376 | buf[idx] = (req->u.dpcd_read.port_number & 0xf) << 4; | |||
| 377 | buf[idx] |= ((req->u.dpcd_read.dpcd_address & 0xf0000) >> 16) & 0xf; | |||
| 378 | idx++; | |||
| 379 | buf[idx] = (req->u.dpcd_read.dpcd_address & 0xff00) >> 8; | |||
| 380 | idx++; | |||
| 381 | buf[idx] = (req->u.dpcd_read.dpcd_address & 0xff); | |||
| 382 | idx++; | |||
| 383 | buf[idx] = (req->u.dpcd_read.num_bytes); | |||
| 384 | idx++; | |||
| 385 | break; | |||
| 386 | ||||
| 387 | case DP_REMOTE_DPCD_WRITE0x21: | |||
| 388 | buf[idx] = (req->u.dpcd_write.port_number & 0xf) << 4; | |||
| 389 | buf[idx] |= ((req->u.dpcd_write.dpcd_address & 0xf0000) >> 16) & 0xf; | |||
| 390 | idx++; | |||
| 391 | buf[idx] = (req->u.dpcd_write.dpcd_address & 0xff00) >> 8; | |||
| 392 | idx++; | |||
| 393 | buf[idx] = (req->u.dpcd_write.dpcd_address & 0xff); | |||
| 394 | idx++; | |||
| 395 | buf[idx] = (req->u.dpcd_write.num_bytes); | |||
| 396 | idx++; | |||
| 397 | memcpy(&buf[idx], req->u.dpcd_write.bytes, req->u.dpcd_write.num_bytes)__builtin_memcpy((&buf[idx]), (req->u.dpcd_write.bytes ), (req->u.dpcd_write.num_bytes)); | |||
| 398 | idx += req->u.dpcd_write.num_bytes; | |||
| 399 | break; | |||
| 400 | case DP_REMOTE_I2C_READ0x22: | |||
| 401 | buf[idx] = (req->u.i2c_read.port_number & 0xf) << 4; | |||
| 402 | buf[idx] |= (req->u.i2c_read.num_transactions & 0x3); | |||
| 403 | idx++; | |||
| 404 | for (i = 0; i < (req->u.i2c_read.num_transactions & 0x3); i++) { | |||
| 405 | buf[idx] = req->u.i2c_read.transactions[i].i2c_dev_id & 0x7f; | |||
| 406 | idx++; | |||
| 407 | buf[idx] = req->u.i2c_read.transactions[i].num_bytes; | |||
| 408 | idx++; | |||
| 409 | memcpy(&buf[idx], req->u.i2c_read.transactions[i].bytes, req->u.i2c_read.transactions[i].num_bytes)__builtin_memcpy((&buf[idx]), (req->u.i2c_read.transactions [i].bytes), (req->u.i2c_read.transactions[i].num_bytes)); | |||
| 410 | idx += req->u.i2c_read.transactions[i].num_bytes; | |||
| 411 | ||||
| 412 | buf[idx] = (req->u.i2c_read.transactions[i].no_stop_bit & 0x1) << 4; | |||
| 413 | buf[idx] |= (req->u.i2c_read.transactions[i].i2c_transaction_delay & 0xf); | |||
| 414 | idx++; | |||
| 415 | } | |||
| 416 | buf[idx] = (req->u.i2c_read.read_i2c_device_id) & 0x7f; | |||
| 417 | idx++; | |||
| 418 | buf[idx] = (req->u.i2c_read.num_bytes_read); | |||
| 419 | idx++; | |||
| 420 | break; | |||
| 421 | ||||
| 422 | case DP_REMOTE_I2C_WRITE0x23: | |||
| 423 | buf[idx] = (req->u.i2c_write.port_number & 0xf) << 4; | |||
| 424 | idx++; | |||
| 425 | buf[idx] = (req->u.i2c_write.write_i2c_device_id) & 0x7f; | |||
| 426 | idx++; | |||
| 427 | buf[idx] = (req->u.i2c_write.num_bytes); | |||
| 428 | idx++; | |||
| 429 | memcpy(&buf[idx], req->u.i2c_write.bytes, req->u.i2c_write.num_bytes)__builtin_memcpy((&buf[idx]), (req->u.i2c_write.bytes) , (req->u.i2c_write.num_bytes)); | |||
| 430 | idx += req->u.i2c_write.num_bytes; | |||
| 431 | break; | |||
| 432 | case DP_QUERY_STREAM_ENC_STATUS0x38: { | |||
| 433 | const struct drm_dp_query_stream_enc_status *msg; | |||
| 434 | ||||
| 435 | msg = &req->u.enc_status; | |||
| 436 | buf[idx] = msg->stream_id; | |||
| 437 | idx++; | |||
| 438 | memcpy(&buf[idx], msg->client_id, sizeof(msg->client_id))__builtin_memcpy((&buf[idx]), (msg->client_id), (sizeof (msg->client_id))); | |||
| 439 | idx += sizeof(msg->client_id); | |||
| 440 | buf[idx] = 0; | |||
| 441 | buf[idx] |= FIELD_PREP(GENMASK(1, 0), msg->stream_event)(((typeof((((~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0)))))(msg->stream_event) << (__builtin_ffsll((((~ 0UL) >> (64 - (1) - 1)) & ((~0UL) << (0)))) - 1)) & ((((~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0))))); | |||
| 442 | buf[idx] |= msg->valid_stream_event ? BIT(2)(1UL << (2)) : 0; | |||
| 443 | buf[idx] |= FIELD_PREP(GENMASK(4, 3), msg->stream_behavior)(((typeof((((~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3)))))(msg->stream_behavior) << (__builtin_ffsll(( ((~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3))) ) - 1)) & ((((~0UL) >> (64 - (4) - 1)) & ((~0UL ) << (3))))); | |||
| 444 | buf[idx] |= msg->valid_stream_behavior ? BIT(5)(1UL << (5)) : 0; | |||
| 445 | idx++; | |||
| 446 | } | |||
| 447 | break; | |||
| 448 | } | |||
| 449 | raw->cur_len = idx; | |||
| 450 | } | |||
| 451 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_dp_encode_sideband_req); | |||
| 452 | ||||
| 453 | /* Decode a sideband request we've encoded, mainly used for debugging */ | |||
| 454 | int | |||
| 455 | drm_dp_decode_sideband_req(const struct drm_dp_sideband_msg_tx *raw, | |||
| 456 | struct drm_dp_sideband_msg_req_body *req) | |||
| 457 | { | |||
| 458 | const u8 *buf = raw->msg; | |||
| 459 | int i, idx = 0; | |||
| 460 | ||||
| 461 | req->req_type = buf[idx++] & 0x7f; | |||
| 462 | switch (req->req_type) { | |||
| 463 | case DP_ENUM_PATH_RESOURCES0x10: | |||
| 464 | case DP_POWER_DOWN_PHY0x25: | |||
| 465 | case DP_POWER_UP_PHY0x24: | |||
| 466 | req->u.port_num.port_number = (buf[idx] >> 4) & 0xf; | |||
| 467 | break; | |||
| 468 | case DP_ALLOCATE_PAYLOAD0x11: | |||
| 469 | { | |||
| 470 | struct drm_dp_allocate_payload *a = | |||
| 471 | &req->u.allocate_payload; | |||
| 472 | ||||
| 473 | a->number_sdp_streams = buf[idx] & 0xf; | |||
| 474 | a->port_number = (buf[idx] >> 4) & 0xf; | |||
| 475 | ||||
| 476 | WARN_ON(buf[++idx] & 0x80)({ int __ret = !!(buf[++idx] & 0x80); if (__ret) printf("WARNING %s failed at %s:%d\n" , "buf[++idx] & 0x80", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 476); __builtin_expect(!!(__ret), 0); }); | |||
| 477 | a->vcpi = buf[idx] & 0x7f; | |||
| 478 | ||||
| 479 | a->pbn = buf[++idx] << 8; | |||
| 480 | a->pbn |= buf[++idx]; | |||
| 481 | ||||
| 482 | idx++; | |||
| 483 | for (i = 0; i < a->number_sdp_streams; i++) { | |||
| 484 | a->sdp_stream_sink[i] = | |||
| 485 | (buf[idx + (i / 2)] >> ((i % 2) ? 0 : 4)) & 0xf; | |||
| 486 | } | |||
| 487 | } | |||
| 488 | break; | |||
| 489 | case DP_QUERY_PAYLOAD0x12: | |||
| 490 | req->u.query_payload.port_number = (buf[idx] >> 4) & 0xf; | |||
| 491 | WARN_ON(buf[++idx] & 0x80)({ int __ret = !!(buf[++idx] & 0x80); if (__ret) printf("WARNING %s failed at %s:%d\n" , "buf[++idx] & 0x80", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 491); __builtin_expect(!!(__ret), 0); }); | |||
| 492 | req->u.query_payload.vcpi = buf[idx] & 0x7f; | |||
| 493 | break; | |||
| 494 | case DP_REMOTE_DPCD_READ0x20: | |||
| 495 | { | |||
| 496 | struct drm_dp_remote_dpcd_read *r = &req->u.dpcd_read; | |||
| 497 | ||||
| 498 | r->port_number = (buf[idx] >> 4) & 0xf; | |||
| 499 | ||||
| 500 | r->dpcd_address = (buf[idx] << 16) & 0xf0000; | |||
| 501 | r->dpcd_address |= (buf[++idx] << 8) & 0xff00; | |||
| 502 | r->dpcd_address |= buf[++idx] & 0xff; | |||
| 503 | ||||
| 504 | r->num_bytes = buf[++idx]; | |||
| 505 | } | |||
| 506 | break; | |||
| 507 | case DP_REMOTE_DPCD_WRITE0x21: | |||
| 508 | { | |||
| 509 | struct drm_dp_remote_dpcd_write *w = | |||
| 510 | &req->u.dpcd_write; | |||
| 511 | ||||
| 512 | w->port_number = (buf[idx] >> 4) & 0xf; | |||
| 513 | ||||
| 514 | w->dpcd_address = (buf[idx] << 16) & 0xf0000; | |||
| 515 | w->dpcd_address |= (buf[++idx] << 8) & 0xff00; | |||
| 516 | w->dpcd_address |= buf[++idx] & 0xff; | |||
| 517 | ||||
| 518 | w->num_bytes = buf[++idx]; | |||
| 519 | ||||
| 520 | w->bytes = kmemdup(&buf[++idx], w->num_bytes, | |||
| 521 | GFP_KERNEL(0x0001 | 0x0004)); | |||
| 522 | if (!w->bytes) | |||
| 523 | return -ENOMEM12; | |||
| 524 | } | |||
| 525 | break; | |||
| 526 | case DP_REMOTE_I2C_READ0x22: | |||
| 527 | { | |||
| 528 | struct drm_dp_remote_i2c_read *r = &req->u.i2c_read; | |||
| 529 | struct drm_dp_remote_i2c_read_tx *tx; | |||
| 530 | bool_Bool failed = false0; | |||
| 531 | ||||
| 532 | r->num_transactions = buf[idx] & 0x3; | |||
| 533 | r->port_number = (buf[idx] >> 4) & 0xf; | |||
| 534 | for (i = 0; i < r->num_transactions; i++) { | |||
| 535 | tx = &r->transactions[i]; | |||
| 536 | ||||
| 537 | tx->i2c_dev_id = buf[++idx] & 0x7f; | |||
| 538 | tx->num_bytes = buf[++idx]; | |||
| 539 | tx->bytes = kmemdup(&buf[++idx], | |||
| 540 | tx->num_bytes, | |||
| 541 | GFP_KERNEL(0x0001 | 0x0004)); | |||
| 542 | if (!tx->bytes) { | |||
| 543 | failed = true1; | |||
| 544 | break; | |||
| 545 | } | |||
| 546 | idx += tx->num_bytes; | |||
| 547 | tx->no_stop_bit = (buf[idx] >> 5) & 0x1; | |||
| 548 | tx->i2c_transaction_delay = buf[idx] & 0xf; | |||
| 549 | } | |||
| 550 | ||||
| 551 | if (failed) { | |||
| 552 | for (i = 0; i < r->num_transactions; i++) { | |||
| 553 | tx = &r->transactions[i]; | |||
| 554 | kfree(tx->bytes); | |||
| 555 | } | |||
| 556 | return -ENOMEM12; | |||
| 557 | } | |||
| 558 | ||||
| 559 | r->read_i2c_device_id = buf[++idx] & 0x7f; | |||
| 560 | r->num_bytes_read = buf[++idx]; | |||
| 561 | } | |||
| 562 | break; | |||
| 563 | case DP_REMOTE_I2C_WRITE0x23: | |||
| 564 | { | |||
| 565 | struct drm_dp_remote_i2c_write *w = &req->u.i2c_write; | |||
| 566 | ||||
| 567 | w->port_number = (buf[idx] >> 4) & 0xf; | |||
| 568 | w->write_i2c_device_id = buf[++idx] & 0x7f; | |||
| 569 | w->num_bytes = buf[++idx]; | |||
| 570 | w->bytes = kmemdup(&buf[++idx], w->num_bytes, | |||
| 571 | GFP_KERNEL(0x0001 | 0x0004)); | |||
| 572 | if (!w->bytes) | |||
| 573 | return -ENOMEM12; | |||
| 574 | } | |||
| 575 | break; | |||
| 576 | case DP_QUERY_STREAM_ENC_STATUS0x38: | |||
| 577 | req->u.enc_status.stream_id = buf[idx++]; | |||
| 578 | for (i = 0; i < sizeof(req->u.enc_status.client_id); i++) | |||
| 579 | req->u.enc_status.client_id[i] = buf[idx++]; | |||
| 580 | ||||
| 581 | req->u.enc_status.stream_event = FIELD_GET(GENMASK(1, 0),((typeof((((~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0)))))(((buf[idx]) & ((((~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0))))) >> (__builtin_ffsll(((( ~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0)))) - 1))) | |||
| 582 | buf[idx])((typeof((((~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0)))))(((buf[idx]) & ((((~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0))))) >> (__builtin_ffsll(((( ~0UL) >> (64 - (1) - 1)) & ((~0UL) << (0)))) - 1))); | |||
| 583 | req->u.enc_status.valid_stream_event = FIELD_GET(BIT(2),((typeof((1UL << (2))))(((buf[idx]) & ((1UL << (2)))) >> (__builtin_ffsll((1UL << (2))) - 1))) | |||
| 584 | buf[idx])((typeof((1UL << (2))))(((buf[idx]) & ((1UL << (2)))) >> (__builtin_ffsll((1UL << (2))) - 1))); | |||
| 585 | req->u.enc_status.stream_behavior = FIELD_GET(GENMASK(4, 3),((typeof((((~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3)))))(((buf[idx]) & ((((~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3))))) >> (__builtin_ffsll(((( ~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3)))) - 1))) | |||
| 586 | buf[idx])((typeof((((~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3)))))(((buf[idx]) & ((((~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3))))) >> (__builtin_ffsll(((( ~0UL) >> (64 - (4) - 1)) & ((~0UL) << (3)))) - 1))); | |||
| 587 | req->u.enc_status.valid_stream_behavior = FIELD_GET(BIT(5),((typeof((1UL << (5))))(((buf[idx]) & ((1UL << (5)))) >> (__builtin_ffsll((1UL << (5))) - 1))) | |||
| 588 | buf[idx])((typeof((1UL << (5))))(((buf[idx]) & ((1UL << (5)))) >> (__builtin_ffsll((1UL << (5))) - 1))); | |||
| 589 | break; | |||
| 590 | } | |||
| 591 | ||||
| 592 | return 0; | |||
| 593 | } | |||
| 594 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_dp_decode_sideband_req); | |||
| 595 | ||||
| 596 | void | |||
| 597 | drm_dp_dump_sideband_msg_req_body(const struct drm_dp_sideband_msg_req_body *req, | |||
| 598 | int indent, struct drm_printer *printer) | |||
| 599 | { | |||
| 600 | int i; | |||
| 601 | ||||
| 602 | #define P(f, ...) drm_printf_indent(printer, indent, f, ##__VA_ARGS__)drm_printf((printer), "%.*s" f, (indent), "\t\t\t\t\tX", ##__VA_ARGS__ ) | |||
| 603 | if (req->req_type == DP_LINK_ADDRESS0x01) { | |||
| 604 | /* No contents to print */ | |||
| 605 | P("type=%s\n", drm_dp_mst_req_type_str(req->req_type)); | |||
| 606 | return; | |||
| 607 | } | |||
| 608 | ||||
| 609 | P("type=%s contents:\n", drm_dp_mst_req_type_str(req->req_type)); | |||
| 610 | indent++; | |||
| 611 | ||||
| 612 | switch (req->req_type) { | |||
| 613 | case DP_ENUM_PATH_RESOURCES0x10: | |||
| 614 | case DP_POWER_DOWN_PHY0x25: | |||
| 615 | case DP_POWER_UP_PHY0x24: | |||
| 616 | P("port=%d\n", req->u.port_num.port_number); | |||
| 617 | break; | |||
| 618 | case DP_ALLOCATE_PAYLOAD0x11: | |||
| 619 | P("port=%d vcpi=%d pbn=%d sdp_streams=%d %*ph\n", | |||
| 620 | req->u.allocate_payload.port_number, | |||
| 621 | req->u.allocate_payload.vcpi, req->u.allocate_payload.pbn, | |||
| 622 | req->u.allocate_payload.number_sdp_streams, | |||
| 623 | req->u.allocate_payload.number_sdp_streams, | |||
| 624 | req->u.allocate_payload.sdp_stream_sink); | |||
| 625 | break; | |||
| 626 | case DP_QUERY_PAYLOAD0x12: | |||
| 627 | P("port=%d vcpi=%d\n", | |||
| 628 | req->u.query_payload.port_number, | |||
| 629 | req->u.query_payload.vcpi); | |||
| 630 | break; | |||
| 631 | case DP_REMOTE_DPCD_READ0x20: | |||
| 632 | P("port=%d dpcd_addr=%05x len=%d\n", | |||
| 633 | req->u.dpcd_read.port_number, req->u.dpcd_read.dpcd_address, | |||
| 634 | req->u.dpcd_read.num_bytes); | |||
| 635 | break; | |||
| 636 | case DP_REMOTE_DPCD_WRITE0x21: | |||
| 637 | P("port=%d addr=%05x len=%d: %*ph\n", | |||
| 638 | req->u.dpcd_write.port_number, | |||
| 639 | req->u.dpcd_write.dpcd_address, | |||
| 640 | req->u.dpcd_write.num_bytes, req->u.dpcd_write.num_bytes, | |||
| 641 | req->u.dpcd_write.bytes); | |||
| 642 | break; | |||
| 643 | case DP_REMOTE_I2C_READ0x22: | |||
| 644 | P("port=%d num_tx=%d id=%d size=%d:\n", | |||
| 645 | req->u.i2c_read.port_number, | |||
| 646 | req->u.i2c_read.num_transactions, | |||
| 647 | req->u.i2c_read.read_i2c_device_id, | |||
| 648 | req->u.i2c_read.num_bytes_read); | |||
| 649 | ||||
| 650 | indent++; | |||
| 651 | for (i = 0; i < req->u.i2c_read.num_transactions; i++) { | |||
| 652 | const struct drm_dp_remote_i2c_read_tx *rtx = | |||
| 653 | &req->u.i2c_read.transactions[i]; | |||
| 654 | ||||
| 655 | P("%d: id=%03d size=%03d no_stop_bit=%d tx_delay=%03d: %*ph\n", | |||
| 656 | i, rtx->i2c_dev_id, rtx->num_bytes, | |||
| 657 | rtx->no_stop_bit, rtx->i2c_transaction_delay, | |||
| 658 | rtx->num_bytes, rtx->bytes); | |||
| 659 | } | |||
| 660 | break; | |||
| 661 | case DP_REMOTE_I2C_WRITE0x23: | |||
| 662 | P("port=%d id=%d size=%d: %*ph\n", | |||
| 663 | req->u.i2c_write.port_number, | |||
| 664 | req->u.i2c_write.write_i2c_device_id, | |||
| 665 | req->u.i2c_write.num_bytes, req->u.i2c_write.num_bytes, | |||
| 666 | req->u.i2c_write.bytes); | |||
| 667 | break; | |||
| 668 | case DP_QUERY_STREAM_ENC_STATUS0x38: | |||
| 669 | P("stream_id=%u client_id=%*ph stream_event=%x " | |||
| 670 | "valid_event=%d stream_behavior=%x valid_behavior=%d", | |||
| 671 | req->u.enc_status.stream_id, | |||
| 672 | (int)ARRAY_SIZE(req->u.enc_status.client_id)(sizeof((req->u.enc_status.client_id)) / sizeof((req->u .enc_status.client_id)[0])), | |||
| 673 | req->u.enc_status.client_id, req->u.enc_status.stream_event, | |||
| 674 | req->u.enc_status.valid_stream_event, | |||
| 675 | req->u.enc_status.stream_behavior, | |||
| 676 | req->u.enc_status.valid_stream_behavior); | |||
| 677 | break; | |||
| 678 | default: | |||
| 679 | P("???\n"); | |||
| 680 | break; | |||
| 681 | } | |||
| 682 | #undef P | |||
| 683 | } | |||
| 684 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_dp_dump_sideband_msg_req_body); | |||
| 685 | ||||
| 686 | static inline void | |||
| 687 | drm_dp_mst_dump_sideband_msg_tx(struct drm_printer *p, | |||
| 688 | const struct drm_dp_sideband_msg_tx *txmsg) | |||
| 689 | { | |||
| 690 | struct drm_dp_sideband_msg_req_body req; | |||
| 691 | char buf[64]; | |||
| 692 | int ret; | |||
| 693 | int i; | |||
| 694 | ||||
| 695 | drm_dp_mst_rad_to_str(txmsg->dst->rad, txmsg->dst->lct, buf, | |||
| 696 | sizeof(buf)); | |||
| 697 | drm_printf(p, "txmsg cur_offset=%x cur_len=%x seqno=%x state=%s path_msg=%d dst=%s\n", | |||
| 698 | txmsg->cur_offset, txmsg->cur_len, txmsg->seqno, | |||
| 699 | drm_dp_mst_sideband_tx_state_str(txmsg->state), | |||
| 700 | txmsg->path_msg, buf); | |||
| 701 | ||||
| 702 | ret = drm_dp_decode_sideband_req(txmsg, &req); | |||
| 703 | if (ret) { | |||
| 704 | drm_printf(p, "<failed to decode sideband req: %d>\n", ret); | |||
| 705 | return; | |||
| 706 | } | |||
| 707 | drm_dp_dump_sideband_msg_req_body(&req, 1, p); | |||
| 708 | ||||
| 709 | switch (req.req_type) { | |||
| 710 | case DP_REMOTE_DPCD_WRITE0x21: | |||
| 711 | kfree(req.u.dpcd_write.bytes); | |||
| 712 | break; | |||
| 713 | case DP_REMOTE_I2C_READ0x22: | |||
| 714 | for (i = 0; i < req.u.i2c_read.num_transactions; i++) | |||
| 715 | kfree(req.u.i2c_read.transactions[i].bytes); | |||
| 716 | break; | |||
| 717 | case DP_REMOTE_I2C_WRITE0x23: | |||
| 718 | kfree(req.u.i2c_write.bytes); | |||
| 719 | break; | |||
| 720 | } | |||
| 721 | } | |||
| 722 | ||||
| 723 | static void drm_dp_crc_sideband_chunk_req(u8 *msg, u8 len) | |||
| 724 | { | |||
| 725 | u8 crc4; | |||
| 726 | ||||
| 727 | crc4 = drm_dp_msg_data_crc4(msg, len); | |||
| 728 | msg[len] = crc4; | |||
| 729 | } | |||
| 730 | ||||
| 731 | static void drm_dp_encode_sideband_reply(struct drm_dp_sideband_msg_reply_body *rep, | |||
| 732 | struct drm_dp_sideband_msg_tx *raw) | |||
| 733 | { | |||
| 734 | int idx = 0; | |||
| 735 | u8 *buf = raw->msg; | |||
| 736 | ||||
| 737 | buf[idx++] = (rep->reply_type & 0x1) << 7 | (rep->req_type & 0x7f); | |||
| 738 | ||||
| 739 | raw->cur_len = idx; | |||
| 740 | } | |||
| 741 | ||||
| 742 | static int drm_dp_sideband_msg_set_header(struct drm_dp_sideband_msg_rx *msg, | |||
| 743 | struct drm_dp_sideband_msg_hdr *hdr, | |||
| 744 | u8 hdrlen) | |||
| 745 | { | |||
| 746 | /* | |||
| 747 | * ignore out-of-order messages or messages that are part of a | |||
| 748 | * failed transaction | |||
| 749 | */ | |||
| 750 | if (!hdr->somt && !msg->have_somt) | |||
| 751 | return false0; | |||
| 752 | ||||
| 753 | /* get length contained in this portion */ | |||
| 754 | msg->curchunk_idx = 0; | |||
| 755 | msg->curchunk_len = hdr->msg_len; | |||
| 756 | msg->curchunk_hdrlen = hdrlen; | |||
| 757 | ||||
| 758 | /* we have already gotten an somt - don't bother parsing */ | |||
| 759 | if (hdr->somt && msg->have_somt) | |||
| 760 | return false0; | |||
| 761 | ||||
| 762 | if (hdr->somt) { | |||
| 763 | memcpy(&msg->initial_hdr, hdr,__builtin_memcpy((&msg->initial_hdr), (hdr), (sizeof(struct drm_dp_sideband_msg_hdr))) | |||
| 764 | sizeof(struct drm_dp_sideband_msg_hdr))__builtin_memcpy((&msg->initial_hdr), (hdr), (sizeof(struct drm_dp_sideband_msg_hdr))); | |||
| 765 | msg->have_somt = true1; | |||
| 766 | } | |||
| 767 | if (hdr->eomt) | |||
| 768 | msg->have_eomt = true1; | |||
| 769 | ||||
| 770 | return true1; | |||
| 771 | } | |||
| 772 | ||||
| 773 | /* this adds a chunk of msg to the builder to get the final msg */ | |||
| 774 | static bool_Bool drm_dp_sideband_append_payload(struct drm_dp_sideband_msg_rx *msg, | |||
| 775 | u8 *replybuf, u8 replybuflen) | |||
| 776 | { | |||
| 777 | u8 crc4; | |||
| 778 | ||||
| 779 | memcpy(&msg->chunk[msg->curchunk_idx], replybuf, replybuflen)__builtin_memcpy((&msg->chunk[msg->curchunk_idx]), ( replybuf), (replybuflen)); | |||
| 780 | msg->curchunk_idx += replybuflen; | |||
| 781 | ||||
| 782 | if (msg->curchunk_idx >= msg->curchunk_len) { | |||
| 783 | /* do CRC */ | |||
| 784 | crc4 = drm_dp_msg_data_crc4(msg->chunk, msg->curchunk_len - 1); | |||
| 785 | if (crc4 != msg->chunk[msg->curchunk_len - 1]) | |||
| 786 | print_hex_dump(KERN_DEBUG"\0017", "wrong crc", | |||
| 787 | DUMP_PREFIX_NONE, 16, 1, | |||
| 788 | msg->chunk, msg->curchunk_len, false0); | |||
| 789 | /* copy chunk into bigger msg */ | |||
| 790 | memcpy(&msg->msg[msg->curlen], msg->chunk, msg->curchunk_len - 1)__builtin_memcpy((&msg->msg[msg->curlen]), (msg-> chunk), (msg->curchunk_len - 1)); | |||
| 791 | msg->curlen += msg->curchunk_len - 1; | |||
| 792 | } | |||
| 793 | return true1; | |||
| 794 | } | |||
| 795 | ||||
| 796 | static bool_Bool drm_dp_sideband_parse_link_address(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 797 | struct drm_dp_sideband_msg_rx *raw, | |||
| 798 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 799 | { | |||
| 800 | int idx = 1; | |||
| 801 | int i; | |||
| 802 | ||||
| 803 | memcpy(repmsg->u.link_addr.guid, &raw->msg[idx], 16)__builtin_memcpy((repmsg->u.link_addr.guid), (&raw-> msg[idx]), (16)); | |||
| 804 | idx += 16; | |||
| 805 | repmsg->u.link_addr.nports = raw->msg[idx] & 0xf; | |||
| 806 | idx++; | |||
| 807 | if (idx > raw->curlen) | |||
| 808 | goto fail_len; | |||
| 809 | for (i = 0; i < repmsg->u.link_addr.nports; i++) { | |||
| 810 | if (raw->msg[idx] & 0x80) | |||
| 811 | repmsg->u.link_addr.ports[i].input_port = 1; | |||
| 812 | ||||
| 813 | repmsg->u.link_addr.ports[i].peer_device_type = (raw->msg[idx] >> 4) & 0x7; | |||
| 814 | repmsg->u.link_addr.ports[i].port_number = (raw->msg[idx] & 0xf); | |||
| 815 | ||||
| 816 | idx++; | |||
| 817 | if (idx > raw->curlen) | |||
| 818 | goto fail_len; | |||
| 819 | repmsg->u.link_addr.ports[i].mcs = (raw->msg[idx] >> 7) & 0x1; | |||
| 820 | repmsg->u.link_addr.ports[i].ddps = (raw->msg[idx] >> 6) & 0x1; | |||
| 821 | if (repmsg->u.link_addr.ports[i].input_port == 0) | |||
| 822 | repmsg->u.link_addr.ports[i].legacy_device_plug_status = (raw->msg[idx] >> 5) & 0x1; | |||
| 823 | idx++; | |||
| 824 | if (idx > raw->curlen) | |||
| 825 | goto fail_len; | |||
| 826 | if (repmsg->u.link_addr.ports[i].input_port == 0) { | |||
| 827 | repmsg->u.link_addr.ports[i].dpcd_revision = (raw->msg[idx]); | |||
| 828 | idx++; | |||
| 829 | if (idx > raw->curlen) | |||
| 830 | goto fail_len; | |||
| 831 | memcpy(repmsg->u.link_addr.ports[i].peer_guid, &raw->msg[idx], 16)__builtin_memcpy((repmsg->u.link_addr.ports[i].peer_guid), (&raw->msg[idx]), (16)); | |||
| 832 | idx += 16; | |||
| 833 | if (idx > raw->curlen) | |||
| 834 | goto fail_len; | |||
| 835 | repmsg->u.link_addr.ports[i].num_sdp_streams = (raw->msg[idx] >> 4) & 0xf; | |||
| 836 | repmsg->u.link_addr.ports[i].num_sdp_stream_sinks = (raw->msg[idx] & 0xf); | |||
| 837 | idx++; | |||
| 838 | ||||
| 839 | } | |||
| 840 | if (idx > raw->curlen) | |||
| 841 | goto fail_len; | |||
| 842 | } | |||
| 843 | ||||
| 844 | return true1; | |||
| 845 | fail_len: | |||
| 846 | DRM_DEBUG_KMS("link address reply parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "link address reply parse length fail %d %d\n" , idx, raw->curlen); | |||
| 847 | return false0; | |||
| 848 | } | |||
| 849 | ||||
| 850 | static bool_Bool drm_dp_sideband_parse_remote_dpcd_read(struct drm_dp_sideband_msg_rx *raw, | |||
| 851 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 852 | { | |||
| 853 | int idx = 1; | |||
| 854 | ||||
| 855 | repmsg->u.remote_dpcd_read_ack.port_number = raw->msg[idx] & 0xf; | |||
| 856 | idx++; | |||
| 857 | if (idx > raw->curlen) | |||
| 858 | goto fail_len; | |||
| 859 | repmsg->u.remote_dpcd_read_ack.num_bytes = raw->msg[idx]; | |||
| 860 | idx++; | |||
| 861 | if (idx > raw->curlen) | |||
| 862 | goto fail_len; | |||
| 863 | ||||
| 864 | memcpy(repmsg->u.remote_dpcd_read_ack.bytes, &raw->msg[idx], repmsg->u.remote_dpcd_read_ack.num_bytes)__builtin_memcpy((repmsg->u.remote_dpcd_read_ack.bytes), ( &raw->msg[idx]), (repmsg->u.remote_dpcd_read_ack.num_bytes )); | |||
| 865 | return true1; | |||
| 866 | fail_len: | |||
| 867 | DRM_DEBUG_KMS("link address reply parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "link address reply parse length fail %d %d\n" , idx, raw->curlen); | |||
| 868 | return false0; | |||
| 869 | } | |||
| 870 | ||||
| 871 | static bool_Bool drm_dp_sideband_parse_remote_dpcd_write(struct drm_dp_sideband_msg_rx *raw, | |||
| 872 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 873 | { | |||
| 874 | int idx = 1; | |||
| 875 | ||||
| 876 | repmsg->u.remote_dpcd_write_ack.port_number = raw->msg[idx] & 0xf; | |||
| 877 | idx++; | |||
| 878 | if (idx > raw->curlen) | |||
| 879 | goto fail_len; | |||
| 880 | return true1; | |||
| 881 | fail_len: | |||
| 882 | DRM_DEBUG_KMS("parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "parse length fail %d %d\n" , idx, raw->curlen); | |||
| 883 | return false0; | |||
| 884 | } | |||
| 885 | ||||
| 886 | static bool_Bool drm_dp_sideband_parse_remote_i2c_read_ack(struct drm_dp_sideband_msg_rx *raw, | |||
| 887 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 888 | { | |||
| 889 | int idx = 1; | |||
| 890 | ||||
| 891 | repmsg->u.remote_i2c_read_ack.port_number = (raw->msg[idx] & 0xf); | |||
| 892 | idx++; | |||
| 893 | if (idx > raw->curlen) | |||
| 894 | goto fail_len; | |||
| 895 | repmsg->u.remote_i2c_read_ack.num_bytes = raw->msg[idx]; | |||
| 896 | idx++; | |||
| 897 | /* TODO check */ | |||
| 898 | memcpy(repmsg->u.remote_i2c_read_ack.bytes, &raw->msg[idx], repmsg->u.remote_i2c_read_ack.num_bytes)__builtin_memcpy((repmsg->u.remote_i2c_read_ack.bytes), (& raw->msg[idx]), (repmsg->u.remote_i2c_read_ack.num_bytes )); | |||
| 899 | return true1; | |||
| 900 | fail_len: | |||
| 901 | DRM_DEBUG_KMS("remote i2c reply parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "remote i2c reply parse length fail %d %d\n" , idx, raw->curlen); | |||
| 902 | return false0; | |||
| 903 | } | |||
| 904 | ||||
| 905 | static bool_Bool drm_dp_sideband_parse_enum_path_resources_ack(struct drm_dp_sideband_msg_rx *raw, | |||
| 906 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 907 | { | |||
| 908 | int idx = 1; | |||
| 909 | ||||
| 910 | repmsg->u.path_resources.port_number = (raw->msg[idx] >> 4) & 0xf; | |||
| 911 | repmsg->u.path_resources.fec_capable = raw->msg[idx] & 0x1; | |||
| 912 | idx++; | |||
| 913 | if (idx > raw->curlen) | |||
| 914 | goto fail_len; | |||
| 915 | repmsg->u.path_resources.full_payload_bw_number = (raw->msg[idx] << 8) | (raw->msg[idx+1]); | |||
| 916 | idx += 2; | |||
| 917 | if (idx > raw->curlen) | |||
| 918 | goto fail_len; | |||
| 919 | repmsg->u.path_resources.avail_payload_bw_number = (raw->msg[idx] << 8) | (raw->msg[idx+1]); | |||
| 920 | idx += 2; | |||
| 921 | if (idx > raw->curlen) | |||
| 922 | goto fail_len; | |||
| 923 | return true1; | |||
| 924 | fail_len: | |||
| 925 | DRM_DEBUG_KMS("enum resource parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "enum resource parse length fail %d %d\n" , idx, raw->curlen); | |||
| 926 | return false0; | |||
| 927 | } | |||
| 928 | ||||
| 929 | static bool_Bool drm_dp_sideband_parse_allocate_payload_ack(struct drm_dp_sideband_msg_rx *raw, | |||
| 930 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 931 | { | |||
| 932 | int idx = 1; | |||
| 933 | ||||
| 934 | repmsg->u.allocate_payload.port_number = (raw->msg[idx] >> 4) & 0xf; | |||
| 935 | idx++; | |||
| 936 | if (idx > raw->curlen) | |||
| 937 | goto fail_len; | |||
| 938 | repmsg->u.allocate_payload.vcpi = raw->msg[idx]; | |||
| 939 | idx++; | |||
| 940 | if (idx > raw->curlen) | |||
| 941 | goto fail_len; | |||
| 942 | repmsg->u.allocate_payload.allocated_pbn = (raw->msg[idx] << 8) | (raw->msg[idx+1]); | |||
| 943 | idx += 2; | |||
| 944 | if (idx > raw->curlen) | |||
| 945 | goto fail_len; | |||
| 946 | return true1; | |||
| 947 | fail_len: | |||
| 948 | DRM_DEBUG_KMS("allocate payload parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "allocate payload parse length fail %d %d\n" , idx, raw->curlen); | |||
| 949 | return false0; | |||
| 950 | } | |||
| 951 | ||||
| 952 | static bool_Bool drm_dp_sideband_parse_query_payload_ack(struct drm_dp_sideband_msg_rx *raw, | |||
| 953 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 954 | { | |||
| 955 | int idx = 1; | |||
| 956 | ||||
| 957 | repmsg->u.query_payload.port_number = (raw->msg[idx] >> 4) & 0xf; | |||
| 958 | idx++; | |||
| 959 | if (idx > raw->curlen) | |||
| 960 | goto fail_len; | |||
| 961 | repmsg->u.query_payload.allocated_pbn = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); | |||
| 962 | idx += 2; | |||
| 963 | if (idx > raw->curlen) | |||
| 964 | goto fail_len; | |||
| 965 | return true1; | |||
| 966 | fail_len: | |||
| 967 | DRM_DEBUG_KMS("query payload parse length fail %d %d\n", idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "query payload parse length fail %d %d\n" , idx, raw->curlen); | |||
| 968 | return false0; | |||
| 969 | } | |||
| 970 | ||||
| 971 | static bool_Bool drm_dp_sideband_parse_power_updown_phy_ack(struct drm_dp_sideband_msg_rx *raw, | |||
| 972 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 973 | { | |||
| 974 | int idx = 1; | |||
| 975 | ||||
| 976 | repmsg->u.port_number.port_number = (raw->msg[idx] >> 4) & 0xf; | |||
| 977 | idx++; | |||
| 978 | if (idx > raw->curlen) { | |||
| 979 | DRM_DEBUG_KMS("power up/down phy parse length fail %d %d\n",___drm_dbg(((void *)0), DRM_UT_KMS, "power up/down phy parse length fail %d %d\n" , idx, raw->curlen) | |||
| 980 | idx, raw->curlen)___drm_dbg(((void *)0), DRM_UT_KMS, "power up/down phy parse length fail %d %d\n" , idx, raw->curlen); | |||
| 981 | return false0; | |||
| 982 | } | |||
| 983 | return true1; | |||
| 984 | } | |||
| 985 | ||||
| 986 | static bool_Bool | |||
| 987 | drm_dp_sideband_parse_query_stream_enc_status( | |||
| 988 | struct drm_dp_sideband_msg_rx *raw, | |||
| 989 | struct drm_dp_sideband_msg_reply_body *repmsg) | |||
| 990 | { | |||
| 991 | struct drm_dp_query_stream_enc_status_ack_reply *reply; | |||
| 992 | ||||
| 993 | reply = &repmsg->u.enc_status; | |||
| 994 | ||||
| 995 | reply->stream_id = raw->msg[3]; | |||
| 996 | ||||
| 997 | reply->reply_signed = raw->msg[2] & BIT(0)(1UL << (0)); | |||
| 998 | ||||
| 999 | /* | |||
| 1000 | * NOTE: It's my impression from reading the spec that the below parsing | |||
| 1001 | * is correct. However I noticed while testing with an HDCP 1.4 display | |||
| 1002 | * through an HDCP 2.2 hub that only bit 3 was set. In that case, I | |||
| 1003 | * would expect both bits to be set. So keep the parsing following the | |||
| 1004 | * spec, but beware reality might not match the spec (at least for some | |||
| 1005 | * configurations). | |||
| 1006 | */ | |||
| 1007 | reply->hdcp_1x_device_present = raw->msg[2] & BIT(4)(1UL << (4)); | |||
| 1008 | reply->hdcp_2x_device_present = raw->msg[2] & BIT(3)(1UL << (3)); | |||
| 1009 | ||||
| 1010 | reply->query_capable_device_present = raw->msg[2] & BIT(5)(1UL << (5)); | |||
| 1011 | reply->legacy_device_present = raw->msg[2] & BIT(6)(1UL << (6)); | |||
| 1012 | reply->unauthorizable_device_present = raw->msg[2] & BIT(7)(1UL << (7)); | |||
| 1013 | ||||
| 1014 | reply->auth_completed = !!(raw->msg[1] & BIT(3)(1UL << (3))); | |||
| 1015 | reply->encryption_enabled = !!(raw->msg[1] & BIT(4)(1UL << (4))); | |||
| 1016 | reply->repeater_present = !!(raw->msg[1] & BIT(5)(1UL << (5))); | |||
| 1017 | reply->state = (raw->msg[1] & GENMASK(7, 6)(((~0UL) >> (64 - (7) - 1)) & ((~0UL) << (6)) )) >> 6; | |||
| 1018 | ||||
| 1019 | return true1; | |||
| 1020 | } | |||
| 1021 | ||||
| 1022 | static bool_Bool drm_dp_sideband_parse_reply(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 1023 | struct drm_dp_sideband_msg_rx *raw, | |||
| 1024 | struct drm_dp_sideband_msg_reply_body *msg) | |||
| 1025 | { | |||
| 1026 | memset(msg, 0, sizeof(*msg))__builtin_memset((msg), (0), (sizeof(*msg))); | |||
| 1027 | msg->reply_type = (raw->msg[0] & 0x80) >> 7; | |||
| 1028 | msg->req_type = (raw->msg[0] & 0x7f); | |||
| 1029 | ||||
| 1030 | if (msg->reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 1031 | memcpy(msg->u.nak.guid, &raw->msg[1], 16)__builtin_memcpy((msg->u.nak.guid), (&raw->msg[1]), (16)); | |||
| 1032 | msg->u.nak.reason = raw->msg[17]; | |||
| 1033 | msg->u.nak.nak_data = raw->msg[18]; | |||
| 1034 | return false0; | |||
| 1035 | } | |||
| 1036 | ||||
| 1037 | switch (msg->req_type) { | |||
| 1038 | case DP_LINK_ADDRESS0x01: | |||
| 1039 | return drm_dp_sideband_parse_link_address(mgr, raw, msg); | |||
| 1040 | case DP_QUERY_PAYLOAD0x12: | |||
| 1041 | return drm_dp_sideband_parse_query_payload_ack(raw, msg); | |||
| 1042 | case DP_REMOTE_DPCD_READ0x20: | |||
| 1043 | return drm_dp_sideband_parse_remote_dpcd_read(raw, msg); | |||
| 1044 | case DP_REMOTE_DPCD_WRITE0x21: | |||
| 1045 | return drm_dp_sideband_parse_remote_dpcd_write(raw, msg); | |||
| 1046 | case DP_REMOTE_I2C_READ0x22: | |||
| 1047 | return drm_dp_sideband_parse_remote_i2c_read_ack(raw, msg); | |||
| 1048 | case DP_REMOTE_I2C_WRITE0x23: | |||
| 1049 | return true1; /* since there's nothing to parse */ | |||
| 1050 | case DP_ENUM_PATH_RESOURCES0x10: | |||
| 1051 | return drm_dp_sideband_parse_enum_path_resources_ack(raw, msg); | |||
| 1052 | case DP_ALLOCATE_PAYLOAD0x11: | |||
| 1053 | return drm_dp_sideband_parse_allocate_payload_ack(raw, msg); | |||
| 1054 | case DP_POWER_DOWN_PHY0x25: | |||
| 1055 | case DP_POWER_UP_PHY0x24: | |||
| 1056 | return drm_dp_sideband_parse_power_updown_phy_ack(raw, msg); | |||
| 1057 | case DP_CLEAR_PAYLOAD_ID_TABLE0x14: | |||
| 1058 | return true1; /* since there's nothing to parse */ | |||
| 1059 | case DP_QUERY_STREAM_ENC_STATUS0x38: | |||
| 1060 | return drm_dp_sideband_parse_query_stream_enc_status(raw, msg); | |||
| 1061 | default: | |||
| 1062 | drm_err(mgr->dev, "Got unknown reply 0x%02x (%s)\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Got unknown reply 0x%02x (%s)\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , msg-> req_type, drm_dp_mst_req_type_str(msg->req_type)) | |||
| 1063 | msg->req_type, drm_dp_mst_req_type_str(msg->req_type))printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Got unknown reply 0x%02x (%s)\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , msg-> req_type, drm_dp_mst_req_type_str(msg->req_type)); | |||
| 1064 | return false0; | |||
| 1065 | } | |||
| 1066 | } | |||
| 1067 | ||||
| 1068 | static bool_Bool | |||
| 1069 | drm_dp_sideband_parse_connection_status_notify(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 1070 | struct drm_dp_sideband_msg_rx *raw, | |||
| 1071 | struct drm_dp_sideband_msg_req_body *msg) | |||
| 1072 | { | |||
| 1073 | int idx = 1; | |||
| 1074 | ||||
| 1075 | msg->u.conn_stat.port_number = (raw->msg[idx] & 0xf0) >> 4; | |||
| 1076 | idx++; | |||
| 1077 | if (idx > raw->curlen) | |||
| 1078 | goto fail_len; | |||
| 1079 | ||||
| 1080 | memcpy(msg->u.conn_stat.guid, &raw->msg[idx], 16)__builtin_memcpy((msg->u.conn_stat.guid), (&raw->msg [idx]), (16)); | |||
| 1081 | idx += 16; | |||
| 1082 | if (idx > raw->curlen) | |||
| 1083 | goto fail_len; | |||
| 1084 | ||||
| 1085 | msg->u.conn_stat.legacy_device_plug_status = (raw->msg[idx] >> 6) & 0x1; | |||
| 1086 | msg->u.conn_stat.displayport_device_plug_status = (raw->msg[idx] >> 5) & 0x1; | |||
| 1087 | msg->u.conn_stat.message_capability_status = (raw->msg[idx] >> 4) & 0x1; | |||
| 1088 | msg->u.conn_stat.input_port = (raw->msg[idx] >> 3) & 0x1; | |||
| 1089 | msg->u.conn_stat.peer_device_type = (raw->msg[idx] & 0x7); | |||
| 1090 | idx++; | |||
| 1091 | return true1; | |||
| 1092 | fail_len: | |||
| 1093 | drm_dbg_kms(mgr->dev, "connection status reply parse length fail %d %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "connection status reply parse length fail %d %d\n" , idx, raw->curlen) | |||
| 1094 | idx, raw->curlen)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "connection status reply parse length fail %d %d\n" , idx, raw->curlen); | |||
| 1095 | return false0; | |||
| 1096 | } | |||
| 1097 | ||||
| 1098 | static bool_Bool drm_dp_sideband_parse_resource_status_notify(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 1099 | struct drm_dp_sideband_msg_rx *raw, | |||
| 1100 | struct drm_dp_sideband_msg_req_body *msg) | |||
| 1101 | { | |||
| 1102 | int idx = 1; | |||
| 1103 | ||||
| 1104 | msg->u.resource_stat.port_number = (raw->msg[idx] & 0xf0) >> 4; | |||
| 1105 | idx++; | |||
| 1106 | if (idx > raw->curlen) | |||
| 1107 | goto fail_len; | |||
| 1108 | ||||
| 1109 | memcpy(msg->u.resource_stat.guid, &raw->msg[idx], 16)__builtin_memcpy((msg->u.resource_stat.guid), (&raw-> msg[idx]), (16)); | |||
| 1110 | idx += 16; | |||
| 1111 | if (idx > raw->curlen) | |||
| 1112 | goto fail_len; | |||
| 1113 | ||||
| 1114 | msg->u.resource_stat.available_pbn = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); | |||
| 1115 | idx++; | |||
| 1116 | return true1; | |||
| 1117 | fail_len: | |||
| 1118 | drm_dbg_kms(mgr->dev, "resource status reply parse length fail %d %d\n", idx, raw->curlen)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "resource status reply parse length fail %d %d\n" , idx, raw->curlen); | |||
| 1119 | return false0; | |||
| 1120 | } | |||
| 1121 | ||||
| 1122 | static bool_Bool drm_dp_sideband_parse_req(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 1123 | struct drm_dp_sideband_msg_rx *raw, | |||
| 1124 | struct drm_dp_sideband_msg_req_body *msg) | |||
| 1125 | { | |||
| 1126 | memset(msg, 0, sizeof(*msg))__builtin_memset((msg), (0), (sizeof(*msg))); | |||
| 1127 | msg->req_type = (raw->msg[0] & 0x7f); | |||
| 1128 | ||||
| 1129 | switch (msg->req_type) { | |||
| 1130 | case DP_CONNECTION_STATUS_NOTIFY0x02: | |||
| 1131 | return drm_dp_sideband_parse_connection_status_notify(mgr, raw, msg); | |||
| 1132 | case DP_RESOURCE_STATUS_NOTIFY0x13: | |||
| 1133 | return drm_dp_sideband_parse_resource_status_notify(mgr, raw, msg); | |||
| 1134 | default: | |||
| 1135 | drm_err(mgr->dev, "Got unknown request 0x%02x (%s)\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Got unknown request 0x%02x (%s)\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , msg-> req_type, drm_dp_mst_req_type_str(msg->req_type)) | |||
| 1136 | msg->req_type, drm_dp_mst_req_type_str(msg->req_type))printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Got unknown request 0x%02x (%s)\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , msg-> req_type, drm_dp_mst_req_type_str(msg->req_type)); | |||
| 1137 | return false0; | |||
| 1138 | } | |||
| 1139 | } | |||
| 1140 | ||||
| 1141 | static void build_dpcd_write(struct drm_dp_sideband_msg_tx *msg, | |||
| 1142 | u8 port_num, u32 offset, u8 num_bytes, u8 *bytes) | |||
| 1143 | { | |||
| 1144 | struct drm_dp_sideband_msg_req_body req; | |||
| 1145 | ||||
| 1146 | req.req_type = DP_REMOTE_DPCD_WRITE0x21; | |||
| 1147 | req.u.dpcd_write.port_number = port_num; | |||
| 1148 | req.u.dpcd_write.dpcd_address = offset; | |||
| 1149 | req.u.dpcd_write.num_bytes = num_bytes; | |||
| 1150 | req.u.dpcd_write.bytes = bytes; | |||
| 1151 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1152 | } | |||
| 1153 | ||||
| 1154 | static void build_link_address(struct drm_dp_sideband_msg_tx *msg) | |||
| 1155 | { | |||
| 1156 | struct drm_dp_sideband_msg_req_body req; | |||
| 1157 | ||||
| 1158 | req.req_type = DP_LINK_ADDRESS0x01; | |||
| 1159 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1160 | } | |||
| 1161 | ||||
| 1162 | static void build_clear_payload_id_table(struct drm_dp_sideband_msg_tx *msg) | |||
| 1163 | { | |||
| 1164 | struct drm_dp_sideband_msg_req_body req; | |||
| 1165 | ||||
| 1166 | req.req_type = DP_CLEAR_PAYLOAD_ID_TABLE0x14; | |||
| 1167 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1168 | msg->path_msg = true1; | |||
| 1169 | } | |||
| 1170 | ||||
| 1171 | static int build_enum_path_resources(struct drm_dp_sideband_msg_tx *msg, | |||
| 1172 | int port_num) | |||
| 1173 | { | |||
| 1174 | struct drm_dp_sideband_msg_req_body req; | |||
| 1175 | ||||
| 1176 | req.req_type = DP_ENUM_PATH_RESOURCES0x10; | |||
| 1177 | req.u.port_num.port_number = port_num; | |||
| 1178 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1179 | msg->path_msg = true1; | |||
| 1180 | return 0; | |||
| 1181 | } | |||
| 1182 | ||||
| 1183 | static void build_allocate_payload(struct drm_dp_sideband_msg_tx *msg, | |||
| 1184 | int port_num, | |||
| 1185 | u8 vcpi, uint16_t pbn, | |||
| 1186 | u8 number_sdp_streams, | |||
| 1187 | u8 *sdp_stream_sink) | |||
| 1188 | { | |||
| 1189 | struct drm_dp_sideband_msg_req_body req; | |||
| 1190 | ||||
| 1191 | memset(&req, 0, sizeof(req))__builtin_memset((&req), (0), (sizeof(req))); | |||
| 1192 | req.req_type = DP_ALLOCATE_PAYLOAD0x11; | |||
| 1193 | req.u.allocate_payload.port_number = port_num; | |||
| 1194 | req.u.allocate_payload.vcpi = vcpi; | |||
| 1195 | req.u.allocate_payload.pbn = pbn; | |||
| 1196 | req.u.allocate_payload.number_sdp_streams = number_sdp_streams; | |||
| 1197 | memcpy(req.u.allocate_payload.sdp_stream_sink, sdp_stream_sink,__builtin_memcpy((req.u.allocate_payload.sdp_stream_sink), (sdp_stream_sink ), (number_sdp_streams)) | |||
| 1198 | number_sdp_streams)__builtin_memcpy((req.u.allocate_payload.sdp_stream_sink), (sdp_stream_sink ), (number_sdp_streams)); | |||
| 1199 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1200 | msg->path_msg = true1; | |||
| 1201 | } | |||
| 1202 | ||||
| 1203 | static void build_power_updown_phy(struct drm_dp_sideband_msg_tx *msg, | |||
| 1204 | int port_num, bool_Bool power_up) | |||
| 1205 | { | |||
| 1206 | struct drm_dp_sideband_msg_req_body req; | |||
| 1207 | ||||
| 1208 | if (power_up) | |||
| 1209 | req.req_type = DP_POWER_UP_PHY0x24; | |||
| 1210 | else | |||
| 1211 | req.req_type = DP_POWER_DOWN_PHY0x25; | |||
| 1212 | ||||
| 1213 | req.u.port_num.port_number = port_num; | |||
| 1214 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1215 | msg->path_msg = true1; | |||
| 1216 | } | |||
| 1217 | ||||
| 1218 | static int | |||
| 1219 | build_query_stream_enc_status(struct drm_dp_sideband_msg_tx *msg, u8 stream_id, | |||
| 1220 | u8 *q_id) | |||
| 1221 | { | |||
| 1222 | struct drm_dp_sideband_msg_req_body req; | |||
| 1223 | ||||
| 1224 | req.req_type = DP_QUERY_STREAM_ENC_STATUS0x38; | |||
| 1225 | req.u.enc_status.stream_id = stream_id; | |||
| 1226 | memcpy(req.u.enc_status.client_id, q_id,__builtin_memcpy((req.u.enc_status.client_id), (q_id), (sizeof (req.u.enc_status.client_id))) | |||
| 1227 | sizeof(req.u.enc_status.client_id))__builtin_memcpy((req.u.enc_status.client_id), (q_id), (sizeof (req.u.enc_status.client_id))); | |||
| 1228 | req.u.enc_status.stream_event = 0; | |||
| 1229 | req.u.enc_status.valid_stream_event = false0; | |||
| 1230 | req.u.enc_status.stream_behavior = 0; | |||
| 1231 | req.u.enc_status.valid_stream_behavior = false0; | |||
| 1232 | ||||
| 1233 | drm_dp_encode_sideband_req(&req, msg); | |||
| 1234 | return 0; | |||
| 1235 | } | |||
| 1236 | ||||
| 1237 | static bool_Bool check_txmsg_state(struct drm_dp_mst_topology_mgr *mgr, | |||
| 1238 | struct drm_dp_sideband_msg_tx *txmsg) | |||
| 1239 | { | |||
| 1240 | unsigned int state; | |||
| 1241 | ||||
| 1242 | /* | |||
| 1243 | * All updates to txmsg->state are protected by mgr->qlock, and the two | |||
| 1244 | * cases we check here are terminal states. For those the barriers | |||
| 1245 | * provided by the wake_up/wait_event pair are enough. | |||
| 1246 | */ | |||
| 1247 | state = READ_ONCE(txmsg->state)({ typeof(txmsg->state) __tmp = *(volatile typeof(txmsg-> state) *)&(txmsg->state); membar_datadep_consumer(); __tmp ; }); | |||
| 1248 | return (state == DRM_DP_SIDEBAND_TX_RX3 || | |||
| 1249 | state == DRM_DP_SIDEBAND_TX_TIMEOUT4); | |||
| 1250 | } | |||
| 1251 | ||||
| 1252 | static int drm_dp_mst_wait_tx_reply(struct drm_dp_mst_branch *mstb, | |||
| 1253 | struct drm_dp_sideband_msg_tx *txmsg) | |||
| 1254 | { | |||
| 1255 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; | |||
| 1256 | unsigned long wait_timeout = msecs_to_jiffies(4000)(((uint64_t)(4000)) * hz / 1000); | |||
| 1257 | unsigned long wait_expires = jiffies + wait_timeout; | |||
| 1258 | int ret; | |||
| 1259 | ||||
| 1260 | for (;;) { | |||
| 1261 | /* | |||
| 1262 | * If the driver provides a way for this, change to | |||
| 1263 | * poll-waiting for the MST reply interrupt if we didn't receive | |||
| 1264 | * it for 50 msec. This would cater for cases where the HPD | |||
| 1265 | * pulse signal got lost somewhere, even though the sink raised | |||
| 1266 | * the corresponding MST interrupt correctly. One example is the | |||
| 1267 | * Club 3D CAC-1557 TypeC -> DP adapter which for some reason | |||
| 1268 | * filters out short pulses with a duration less than ~540 usec. | |||
| 1269 | * | |||
| 1270 | * The poll period is 50 msec to avoid missing an interrupt | |||
| 1271 | * after the sink has cleared it (after a 110msec timeout | |||
| 1272 | * since it raised the interrupt). | |||
| 1273 | */ | |||
| 1274 | ret = wait_event_timeout(mgr->tx_waitq,({ long __ret = mgr->cbs->poll_hpd_irq ? (((uint64_t)(50 )) * hz / 1000) : wait_timeout; if (!(check_txmsg_state(mgr, txmsg ))) __ret = ({ long __ret = mgr->cbs->poll_hpd_irq ? (( (uint64_t)(50)) * hz / 1000) : wait_timeout; struct wait_queue_entry __wq_entry; init_wait_entry(&__wq_entry, 0); do { int __error , __wait; unsigned long deadline; ((!cold) ? (void)0 : __assert ("diagnostic ", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 1278, "!cold")); prepare_to_wait(&mgr->tx_waitq, & __wq_entry, 0); deadline = jiffies + __ret; __wait = !(check_txmsg_state (mgr, txmsg)); __error = sleep_finish(__ret, __wait); if ((mgr ->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout ) > 0) __ret = deadline - jiffies; if (__error == -1 || __error == 4) { __ret = -4; break; } if ((mgr->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout) > 0 && (__ret <= 0 || __error == 35)) { __ret = ((check_txmsg_state (mgr, txmsg))) ? 1 : 0; break; } } while (__ret > 0 && !(check_txmsg_state(mgr, txmsg))); finish_wait(&mgr-> tx_waitq, &__wq_entry); __ret; }); __ret; }) | |||
| 1275 | check_txmsg_state(mgr, txmsg),({ long __ret = mgr->cbs->poll_hpd_irq ? (((uint64_t)(50 )) * hz / 1000) : wait_timeout; if (!(check_txmsg_state(mgr, txmsg ))) __ret = ({ long __ret = mgr->cbs->poll_hpd_irq ? (( (uint64_t)(50)) * hz / 1000) : wait_timeout; struct wait_queue_entry __wq_entry; init_wait_entry(&__wq_entry, 0); do { int __error , __wait; unsigned long deadline; ((!cold) ? (void)0 : __assert ("diagnostic ", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 1278, "!cold")); prepare_to_wait(&mgr->tx_waitq, & __wq_entry, 0); deadline = jiffies + __ret; __wait = !(check_txmsg_state (mgr, txmsg)); __error = sleep_finish(__ret, __wait); if ((mgr ->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout ) > 0) __ret = deadline - jiffies; if (__error == -1 || __error == 4) { __ret = -4; break; } if ((mgr->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout) > 0 && (__ret <= 0 || __error == 35)) { __ret = ((check_txmsg_state (mgr, txmsg))) ? 1 : 0; break; } } while (__ret > 0 && !(check_txmsg_state(mgr, txmsg))); finish_wait(&mgr-> tx_waitq, &__wq_entry); __ret; }); __ret; }) | |||
| 1276 | mgr->cbs->poll_hpd_irq ?({ long __ret = mgr->cbs->poll_hpd_irq ? (((uint64_t)(50 )) * hz / 1000) : wait_timeout; if (!(check_txmsg_state(mgr, txmsg ))) __ret = ({ long __ret = mgr->cbs->poll_hpd_irq ? (( (uint64_t)(50)) * hz / 1000) : wait_timeout; struct wait_queue_entry __wq_entry; init_wait_entry(&__wq_entry, 0); do { int __error , __wait; unsigned long deadline; ((!cold) ? (void)0 : __assert ("diagnostic ", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 1278, "!cold")); prepare_to_wait(&mgr->tx_waitq, & __wq_entry, 0); deadline = jiffies + __ret; __wait = !(check_txmsg_state (mgr, txmsg)); __error = sleep_finish(__ret, __wait); if ((mgr ->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout ) > 0) __ret = deadline - jiffies; if (__error == -1 || __error == 4) { __ret = -4; break; } if ((mgr->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout) > 0 && (__ret <= 0 || __error == 35)) { __ret = ((check_txmsg_state (mgr, txmsg))) ? 1 : 0; break; } } while (__ret > 0 && !(check_txmsg_state(mgr, txmsg))); finish_wait(&mgr-> tx_waitq, &__wq_entry); __ret; }); __ret; }) | |||
| 1277 | msecs_to_jiffies(50) :({ long __ret = mgr->cbs->poll_hpd_irq ? (((uint64_t)(50 )) * hz / 1000) : wait_timeout; if (!(check_txmsg_state(mgr, txmsg ))) __ret = ({ long __ret = mgr->cbs->poll_hpd_irq ? (( (uint64_t)(50)) * hz / 1000) : wait_timeout; struct wait_queue_entry __wq_entry; init_wait_entry(&__wq_entry, 0); do { int __error , __wait; unsigned long deadline; ((!cold) ? (void)0 : __assert ("diagnostic ", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 1278, "!cold")); prepare_to_wait(&mgr->tx_waitq, & __wq_entry, 0); deadline = jiffies + __ret; __wait = !(check_txmsg_state (mgr, txmsg)); __error = sleep_finish(__ret, __wait); if ((mgr ->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout ) > 0) __ret = deadline - jiffies; if (__error == -1 || __error == 4) { __ret = -4; break; } if ((mgr->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout) > 0 && (__ret <= 0 || __error == 35)) { __ret = ((check_txmsg_state (mgr, txmsg))) ? 1 : 0; break; } } while (__ret > 0 && !(check_txmsg_state(mgr, txmsg))); finish_wait(&mgr-> tx_waitq, &__wq_entry); __ret; }); __ret; }) | |||
| 1278 | wait_timeout)({ long __ret = mgr->cbs->poll_hpd_irq ? (((uint64_t)(50 )) * hz / 1000) : wait_timeout; if (!(check_txmsg_state(mgr, txmsg ))) __ret = ({ long __ret = mgr->cbs->poll_hpd_irq ? (( (uint64_t)(50)) * hz / 1000) : wait_timeout; struct wait_queue_entry __wq_entry; init_wait_entry(&__wq_entry, 0); do { int __error , __wait; unsigned long deadline; ((!cold) ? (void)0 : __assert ("diagnostic ", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 1278, "!cold")); prepare_to_wait(&mgr->tx_waitq, & __wq_entry, 0); deadline = jiffies + __ret; __wait = !(check_txmsg_state (mgr, txmsg)); __error = sleep_finish(__ret, __wait); if ((mgr ->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout ) > 0) __ret = deadline - jiffies; if (__error == -1 || __error == 4) { __ret = -4; break; } if ((mgr->cbs->poll_hpd_irq ? (((uint64_t)(50)) * hz / 1000) : wait_timeout) > 0 && (__ret <= 0 || __error == 35)) { __ret = ((check_txmsg_state (mgr, txmsg))) ? 1 : 0; break; } } while (__ret > 0 && !(check_txmsg_state(mgr, txmsg))); finish_wait(&mgr-> tx_waitq, &__wq_entry); __ret; }); __ret; }); | |||
| 1279 | ||||
| 1280 | if (ret || !mgr->cbs->poll_hpd_irq || | |||
| 1281 | time_after(jiffies, wait_expires)) | |||
| 1282 | break; | |||
| 1283 | ||||
| 1284 | mgr->cbs->poll_hpd_irq(mgr); | |||
| 1285 | } | |||
| 1286 | ||||
| 1287 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 1288 | if (ret > 0) { | |||
| 1289 | if (txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT4) { | |||
| 1290 | ret = -EIO5; | |||
| 1291 | goto out; | |||
| 1292 | } | |||
| 1293 | } else { | |||
| 1294 | drm_dbg_kms(mgr->dev, "timedout msg send %p %d %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "timedout msg send %p %d %d\n" , txmsg, txmsg->state, txmsg->seqno) | |||
| 1295 | txmsg, txmsg->state, txmsg->seqno)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "timedout msg send %p %d %d\n" , txmsg, txmsg->state, txmsg->seqno); | |||
| 1296 | ||||
| 1297 | /* dump some state */ | |||
| 1298 | ret = -EIO5; | |||
| 1299 | ||||
| 1300 | /* remove from q */ | |||
| 1301 | if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED0 || | |||
| 1302 | txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND1 || | |||
| 1303 | txmsg->state == DRM_DP_SIDEBAND_TX_SENT2) | |||
| 1304 | list_del(&txmsg->next); | |||
| 1305 | } | |||
| 1306 | out: | |||
| 1307 | if (unlikely(ret == -EIO)__builtin_expect(!!(ret == -5), 0) && drm_debug_enabled(DRM_UT_DP)drm_debug_enabled_raw(DRM_UT_DP)) { | |||
| 1308 | struct drm_printer p = drm_debug_printer(DBG_PREFIX"[dp_mst]"); | |||
| 1309 | ||||
| 1310 | drm_dp_mst_dump_sideband_msg_tx(&p, txmsg); | |||
| 1311 | } | |||
| 1312 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 1313 | ||||
| 1314 | drm_dp_mst_kick_tx(mgr); | |||
| 1315 | return ret; | |||
| 1316 | } | |||
| 1317 | ||||
| 1318 | static struct drm_dp_mst_branch *drm_dp_add_mst_branch_device(u8 lct, u8 *rad) | |||
| 1319 | { | |||
| 1320 | struct drm_dp_mst_branch *mstb; | |||
| 1321 | ||||
| 1322 | mstb = kzalloc(sizeof(*mstb), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 1323 | if (!mstb) | |||
| 1324 | return NULL((void *)0); | |||
| 1325 | ||||
| 1326 | mstb->lct = lct; | |||
| 1327 | if (lct > 1) | |||
| 1328 | memcpy(mstb->rad, rad, lct / 2)__builtin_memcpy((mstb->rad), (rad), (lct / 2)); | |||
| 1329 | INIT_LIST_HEAD(&mstb->ports); | |||
| 1330 | kref_init(&mstb->topology_kref); | |||
| 1331 | kref_init(&mstb->malloc_kref); | |||
| 1332 | return mstb; | |||
| 1333 | } | |||
| 1334 | ||||
| 1335 | static void drm_dp_free_mst_branch_device(struct kref *kref) | |||
| 1336 | { | |||
| 1337 | struct drm_dp_mst_branch *mstb = | |||
| 1338 | container_of(kref, struct drm_dp_mst_branch, malloc_kref)({ const __typeof( ((struct drm_dp_mst_branch *)0)->malloc_kref ) *__mptr = (kref); (struct drm_dp_mst_branch *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_branch, malloc_kref) ) ;}); | |||
| 1339 | ||||
| 1340 | if (mstb->port_parent) | |||
| 1341 | drm_dp_mst_put_port_malloc(mstb->port_parent); | |||
| 1342 | ||||
| 1343 | kfree(mstb); | |||
| 1344 | } | |||
| 1345 | ||||
| 1346 | /** | |||
| 1347 | * DOC: Branch device and port refcounting | |||
| 1348 | * | |||
| 1349 | * Topology refcount overview | |||
| 1350 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~ | |||
| 1351 | * | |||
| 1352 | * The refcounting schemes for &struct drm_dp_mst_branch and &struct | |||
| 1353 | * drm_dp_mst_port are somewhat unusual. Both ports and branch devices have | |||
| 1354 | * two different kinds of refcounts: topology refcounts, and malloc refcounts. | |||
| 1355 | * | |||
| 1356 | * Topology refcounts are not exposed to drivers, and are handled internally | |||
| 1357 | * by the DP MST helpers. The helpers use them in order to prevent the | |||
| 1358 | * in-memory topology state from being changed in the middle of critical | |||
| 1359 | * operations like changing the internal state of payload allocations. This | |||
| 1360 | * means each branch and port will be considered to be connected to the rest | |||
| 1361 | * of the topology until its topology refcount reaches zero. Additionally, | |||
| 1362 | * for ports this means that their associated &struct drm_connector will stay | |||
| 1363 | * registered with userspace until the port's refcount reaches 0. | |||
| 1364 | * | |||
| 1365 | * Malloc refcount overview | |||
| 1366 | * ~~~~~~~~~~~~~~~~~~~~~~~~ | |||
| 1367 | * | |||
| 1368 | * Malloc references are used to keep a &struct drm_dp_mst_port or &struct | |||
| 1369 | * drm_dp_mst_branch allocated even after all of its topology references have | |||
| 1370 | * been dropped, so that the driver or MST helpers can safely access each | |||
| 1371 | * branch's last known state before it was disconnected from the topology. | |||
| 1372 | * When the malloc refcount of a port or branch reaches 0, the memory | |||
| 1373 | * allocation containing the &struct drm_dp_mst_branch or &struct | |||
| 1374 | * drm_dp_mst_port respectively will be freed. | |||
| 1375 | * | |||
| 1376 | * For &struct drm_dp_mst_branch, malloc refcounts are not currently exposed | |||
| 1377 | * to drivers. As of writing this documentation, there are no drivers that | |||
| 1378 | * have a usecase for accessing &struct drm_dp_mst_branch outside of the MST | |||
| 1379 | * helpers. Exposing this API to drivers in a race-free manner would take more | |||
| 1380 | * tweaking of the refcounting scheme, however patches are welcome provided | |||
| 1381 | * there is a legitimate driver usecase for this. | |||
| 1382 | * | |||
| 1383 | * Refcount relationships in a topology | |||
| 1384 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |||
| 1385 | * | |||
| 1386 | * Let's take a look at why the relationship between topology and malloc | |||
| 1387 | * refcounts is designed the way it is. | |||
| 1388 | * | |||
| 1389 | * .. kernel-figure:: dp-mst/topology-figure-1.dot | |||
| 1390 | * | |||
| 1391 | * An example of topology and malloc refs in a DP MST topology with two | |||
| 1392 | * active payloads. Topology refcount increments are indicated by solid | |||
| 1393 | * lines, and malloc refcount increments are indicated by dashed lines. | |||
| 1394 | * Each starts from the branch which incremented the refcount, and ends at | |||
| 1395 | * the branch to which the refcount belongs to, i.e. the arrow points the | |||
| 1396 | * same way as the C pointers used to reference a structure. | |||
| 1397 | * | |||
| 1398 | * As you can see in the above figure, every branch increments the topology | |||
| 1399 | * refcount of its children, and increments the malloc refcount of its | |||
| 1400 | * parent. Additionally, every payload increments the malloc refcount of its | |||
| 1401 | * assigned port by 1. | |||
| 1402 | * | |||
| 1403 | * So, what would happen if MSTB #3 from the above figure was unplugged from | |||
| 1404 | * the system, but the driver hadn't yet removed payload #2 from port #3? The | |||
| 1405 | * topology would start to look like the figure below. | |||
| 1406 | * | |||
| 1407 | * .. kernel-figure:: dp-mst/topology-figure-2.dot | |||
| 1408 | * | |||
| 1409 | * Ports and branch devices which have been released from memory are | |||
| 1410 | * colored grey, and references which have been removed are colored red. | |||
| 1411 | * | |||
| 1412 | * Whenever a port or branch device's topology refcount reaches zero, it will | |||
| 1413 | * decrement the topology refcounts of all its children, the malloc refcount | |||
| 1414 | * of its parent, and finally its own malloc refcount. For MSTB #4 and port | |||
| 1415 | * #4, this means they both have been disconnected from the topology and freed | |||
| 1416 | * from memory. But, because payload #2 is still holding a reference to port | |||
| 1417 | * #3, port #3 is removed from the topology but its &struct drm_dp_mst_port | |||
| 1418 | * is still accessible from memory. This also means port #3 has not yet | |||
| 1419 | * decremented the malloc refcount of MSTB #3, so its &struct | |||
| 1420 | * drm_dp_mst_branch will also stay allocated in memory until port #3's | |||
| 1421 | * malloc refcount reaches 0. | |||
| 1422 | * | |||
| 1423 | * This relationship is necessary because in order to release payload #2, we | |||
| 1424 | * need to be able to figure out the last relative of port #3 that's still | |||
| 1425 | * connected to the topology. In this case, we would travel up the topology as | |||
| 1426 | * shown below. | |||
| 1427 | * | |||
| 1428 | * .. kernel-figure:: dp-mst/topology-figure-3.dot | |||
| 1429 | * | |||
| 1430 | * And finally, remove payload #2 by communicating with port #2 through | |||
| 1431 | * sideband transactions. | |||
| 1432 | */ | |||
| 1433 | ||||
| 1434 | /** | |||
| 1435 | * drm_dp_mst_get_mstb_malloc() - Increment the malloc refcount of a branch | |||
| 1436 | * device | |||
| 1437 | * @mstb: The &struct drm_dp_mst_branch to increment the malloc refcount of | |||
| 1438 | * | |||
| 1439 | * Increments &drm_dp_mst_branch.malloc_kref. When | |||
| 1440 | * &drm_dp_mst_branch.malloc_kref reaches 0, the memory allocation for @mstb | |||
| 1441 | * will be released and @mstb may no longer be used. | |||
| 1442 | * | |||
| 1443 | * See also: drm_dp_mst_put_mstb_malloc() | |||
| 1444 | */ | |||
| 1445 | static void | |||
| 1446 | drm_dp_mst_get_mstb_malloc(struct drm_dp_mst_branch *mstb) | |||
| 1447 | { | |||
| 1448 | kref_get(&mstb->malloc_kref); | |||
| 1449 | drm_dbg(mstb->mgr->dev, "mstb %p (%d)\n", mstb, kref_read(&mstb->malloc_kref))__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "mstb %p (%d)\n" , mstb, kref_read(&mstb->malloc_kref)); | |||
| 1450 | } | |||
| 1451 | ||||
| 1452 | /** | |||
| 1453 | * drm_dp_mst_put_mstb_malloc() - Decrement the malloc refcount of a branch | |||
| 1454 | * device | |||
| 1455 | * @mstb: The &struct drm_dp_mst_branch to decrement the malloc refcount of | |||
| 1456 | * | |||
| 1457 | * Decrements &drm_dp_mst_branch.malloc_kref. When | |||
| 1458 | * &drm_dp_mst_branch.malloc_kref reaches 0, the memory allocation for @mstb | |||
| 1459 | * will be released and @mstb may no longer be used. | |||
| 1460 | * | |||
| 1461 | * See also: drm_dp_mst_get_mstb_malloc() | |||
| 1462 | */ | |||
| 1463 | static void | |||
| 1464 | drm_dp_mst_put_mstb_malloc(struct drm_dp_mst_branch *mstb) | |||
| 1465 | { | |||
| 1466 | drm_dbg(mstb->mgr->dev, "mstb %p (%d)\n", mstb, kref_read(&mstb->malloc_kref) - 1)__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "mstb %p (%d)\n" , mstb, kref_read(&mstb->malloc_kref) - 1); | |||
| 1467 | kref_put(&mstb->malloc_kref, drm_dp_free_mst_branch_device); | |||
| 1468 | } | |||
| 1469 | ||||
| 1470 | static void drm_dp_free_mst_port(struct kref *kref) | |||
| 1471 | { | |||
| 1472 | struct drm_dp_mst_port *port = | |||
| 1473 | container_of(kref, struct drm_dp_mst_port, malloc_kref)({ const __typeof( ((struct drm_dp_mst_port *)0)->malloc_kref ) *__mptr = (kref); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_port, malloc_kref) ); }); | |||
| 1474 | ||||
| 1475 | drm_dp_mst_put_mstb_malloc(port->parent); | |||
| 1476 | kfree(port); | |||
| 1477 | } | |||
| 1478 | ||||
| 1479 | /** | |||
| 1480 | * drm_dp_mst_get_port_malloc() - Increment the malloc refcount of an MST port | |||
| 1481 | * @port: The &struct drm_dp_mst_port to increment the malloc refcount of | |||
| 1482 | * | |||
| 1483 | * Increments &drm_dp_mst_port.malloc_kref. When &drm_dp_mst_port.malloc_kref | |||
| 1484 | * reaches 0, the memory allocation for @port will be released and @port may | |||
| 1485 | * no longer be used. | |||
| 1486 | * | |||
| 1487 | * Because @port could potentially be freed at any time by the DP MST helpers | |||
| 1488 | * if &drm_dp_mst_port.malloc_kref reaches 0, including during a call to this | |||
| 1489 | * function, drivers that which to make use of &struct drm_dp_mst_port should | |||
| 1490 | * ensure that they grab at least one main malloc reference to their MST ports | |||
| 1491 | * in &drm_dp_mst_topology_cbs.add_connector. This callback is called before | |||
| 1492 | * there is any chance for &drm_dp_mst_port.malloc_kref to reach 0. | |||
| 1493 | * | |||
| 1494 | * See also: drm_dp_mst_put_port_malloc() | |||
| 1495 | */ | |||
| 1496 | void | |||
| 1497 | drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port) | |||
| 1498 | { | |||
| 1499 | kref_get(&port->malloc_kref); | |||
| 1500 | drm_dbg(port->mgr->dev, "port %p (%d)\n", port, kref_read(&port->malloc_kref))__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "port %p (%d)\n" , port, kref_read(&port->malloc_kref)); | |||
| 1501 | } | |||
| 1502 | EXPORT_SYMBOL(drm_dp_mst_get_port_malloc); | |||
| 1503 | ||||
| 1504 | /** | |||
| 1505 | * drm_dp_mst_put_port_malloc() - Decrement the malloc refcount of an MST port | |||
| 1506 | * @port: The &struct drm_dp_mst_port to decrement the malloc refcount of | |||
| 1507 | * | |||
| 1508 | * Decrements &drm_dp_mst_port.malloc_kref. When &drm_dp_mst_port.malloc_kref | |||
| 1509 | * reaches 0, the memory allocation for @port will be released and @port may | |||
| 1510 | * no longer be used. | |||
| 1511 | * | |||
| 1512 | * See also: drm_dp_mst_get_port_malloc() | |||
| 1513 | */ | |||
| 1514 | void | |||
| 1515 | drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port) | |||
| 1516 | { | |||
| 1517 | drm_dbg(port->mgr->dev, "port %p (%d)\n", port, kref_read(&port->malloc_kref) - 1)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "port %p (%d)\n" , port, kref_read(&port->malloc_kref) - 1); | |||
| 1518 | kref_put(&port->malloc_kref, drm_dp_free_mst_port); | |||
| 1519 | } | |||
| 1520 | EXPORT_SYMBOL(drm_dp_mst_put_port_malloc); | |||
| 1521 | ||||
| 1522 | #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)0 | |||
| 1523 | ||||
| 1524 | #define STACK_DEPTH 8 | |||
| 1525 | ||||
| 1526 | static noinline__attribute__((__noinline__)) void | |||
| 1527 | __topology_ref_save(struct drm_dp_mst_topology_mgr *mgr, | |||
| 1528 | struct drm_dp_mst_topology_ref_history *history, | |||
| 1529 | enum drm_dp_mst_topology_ref_type type) | |||
| 1530 | { | |||
| 1531 | struct drm_dp_mst_topology_ref_entry *entry = NULL((void *)0); | |||
| 1532 | depot_stack_handle_t backtrace; | |||
| 1533 | ulong stack_entries[STACK_DEPTH]; | |||
| 1534 | uint n; | |||
| 1535 | int i; | |||
| 1536 | ||||
| 1537 | n = stack_trace_save(stack_entries, ARRAY_SIZE(stack_entries)(sizeof((stack_entries)) / sizeof((stack_entries)[0])), 1); | |||
| 1538 | backtrace = stack_depot_save(stack_entries, n, GFP_KERNEL(0x0001 | 0x0004)); | |||
| 1539 | if (!backtrace) | |||
| 1540 | return; | |||
| 1541 | ||||
| 1542 | /* Try to find an existing entry for this backtrace */ | |||
| 1543 | for (i = 0; i < history->len; i++) { | |||
| 1544 | if (history->entries[i].backtrace == backtrace) { | |||
| 1545 | entry = &history->entries[i]; | |||
| 1546 | break; | |||
| 1547 | } | |||
| 1548 | } | |||
| 1549 | ||||
| 1550 | /* Otherwise add one */ | |||
| 1551 | if (!entry) { | |||
| 1552 | struct drm_dp_mst_topology_ref_entry *new; | |||
| 1553 | int new_len = history->len + 1; | |||
| 1554 | ||||
| 1555 | new = krealloc(history->entries, sizeof(*new) * new_len, | |||
| 1556 | GFP_KERNEL(0x0001 | 0x0004)); | |||
| 1557 | if (!new) | |||
| 1558 | return; | |||
| 1559 | ||||
| 1560 | entry = &new[history->len]; | |||
| 1561 | history->len = new_len; | |||
| 1562 | history->entries = new; | |||
| 1563 | ||||
| 1564 | entry->backtrace = backtrace; | |||
| 1565 | entry->type = type; | |||
| 1566 | entry->count = 0; | |||
| 1567 | } | |||
| 1568 | entry->count++; | |||
| 1569 | entry->ts_nsec = ktime_get_ns(); | |||
| 1570 | } | |||
| 1571 | ||||
| 1572 | static int | |||
| 1573 | topology_ref_history_cmp(const void *a, const void *b) | |||
| 1574 | { | |||
| 1575 | const struct drm_dp_mst_topology_ref_entry *entry_a = a, *entry_b = b; | |||
| 1576 | ||||
| 1577 | if (entry_a->ts_nsec > entry_b->ts_nsec) | |||
| 1578 | return 1; | |||
| 1579 | else if (entry_a->ts_nsec < entry_b->ts_nsec) | |||
| 1580 | return -1; | |||
| 1581 | else | |||
| 1582 | return 0; | |||
| 1583 | } | |||
| 1584 | ||||
| 1585 | static inline const char * | |||
| 1586 | topology_ref_type_to_str(enum drm_dp_mst_topology_ref_type type) | |||
| 1587 | { | |||
| 1588 | if (type == DRM_DP_MST_TOPOLOGY_REF_GET) | |||
| 1589 | return "get"; | |||
| 1590 | else | |||
| 1591 | return "put"; | |||
| 1592 | } | |||
| 1593 | ||||
| 1594 | static void | |||
| 1595 | __dump_topology_ref_history(struct drm_dp_mst_topology_ref_history *history, | |||
| 1596 | void *ptr, const char *type_str) | |||
| 1597 | { | |||
| 1598 | struct drm_printer p = drm_debug_printer(DBG_PREFIX"[dp_mst]"); | |||
| 1599 | char *buf = kzalloc(PAGE_SIZE(1 << 12), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 1600 | int i; | |||
| 1601 | ||||
| 1602 | if (!buf) | |||
| 1603 | return; | |||
| 1604 | ||||
| 1605 | if (!history->len) | |||
| 1606 | goto out; | |||
| 1607 | ||||
| 1608 | /* First, sort the list so that it goes from oldest to newest | |||
| 1609 | * reference entry | |||
| 1610 | */ | |||
| 1611 | sort(history->entries, history->len, sizeof(*history->entries), | |||
| 1612 | topology_ref_history_cmp, NULL((void *)0)); | |||
| 1613 | ||||
| 1614 | drm_printf(&p, "%s (%p) topology count reached 0, dumping history:\n", | |||
| 1615 | type_str, ptr); | |||
| 1616 | ||||
| 1617 | for (i = 0; i < history->len; i++) { | |||
| 1618 | const struct drm_dp_mst_topology_ref_entry *entry = | |||
| 1619 | &history->entries[i]; | |||
| 1620 | u64 ts_nsec = entry->ts_nsec; | |||
| 1621 | u32 rem_nsec = do_div(ts_nsec, 1000000000)({ uint32_t __base = (1000000000); uint32_t __rem = ((uint64_t )(ts_nsec)) % __base; (ts_nsec) = ((uint64_t)(ts_nsec)) / __base ; __rem; }); | |||
| 1622 | ||||
| 1623 | stack_depot_snprint(entry->backtrace, buf, PAGE_SIZE(1 << 12), 4); | |||
| 1624 | ||||
| 1625 | drm_printf(&p, " %d %ss (last at %5llu.%06u):\n%s", | |||
| 1626 | entry->count, | |||
| 1627 | topology_ref_type_to_str(entry->type), | |||
| 1628 | ts_nsec, rem_nsec / 1000, buf); | |||
| 1629 | } | |||
| 1630 | ||||
| 1631 | /* Now free the history, since this is the only time we expose it */ | |||
| 1632 | kfree(history->entries); | |||
| 1633 | out: | |||
| 1634 | kfree(buf); | |||
| 1635 | } | |||
| 1636 | ||||
| 1637 | static __always_inlineinline __attribute__((__always_inline__)) void | |||
| 1638 | drm_dp_mst_dump_mstb_topology_history(struct drm_dp_mst_branch *mstb) | |||
| 1639 | { | |||
| 1640 | __dump_topology_ref_history(&mstb->topology_ref_history, mstb, | |||
| 1641 | "MSTB"); | |||
| 1642 | } | |||
| 1643 | ||||
| 1644 | static __always_inlineinline __attribute__((__always_inline__)) void | |||
| 1645 | drm_dp_mst_dump_port_topology_history(struct drm_dp_mst_port *port) | |||
| 1646 | { | |||
| 1647 | __dump_topology_ref_history(&port->topology_ref_history, port, | |||
| 1648 | "Port"); | |||
| 1649 | } | |||
| 1650 | ||||
| 1651 | static __always_inlineinline __attribute__((__always_inline__)) void | |||
| 1652 | save_mstb_topology_ref(struct drm_dp_mst_branch *mstb, | |||
| 1653 | enum drm_dp_mst_topology_ref_type type) | |||
| 1654 | { | |||
| 1655 | __topology_ref_save(mstb->mgr, &mstb->topology_ref_history, type); | |||
| 1656 | } | |||
| 1657 | ||||
| 1658 | static __always_inlineinline __attribute__((__always_inline__)) void | |||
| 1659 | save_port_topology_ref(struct drm_dp_mst_port *port, | |||
| 1660 | enum drm_dp_mst_topology_ref_type type) | |||
| 1661 | { | |||
| 1662 | __topology_ref_save(port->mgr, &port->topology_ref_history, type); | |||
| 1663 | } | |||
| 1664 | ||||
| 1665 | static inline void | |||
| 1666 | topology_ref_history_lock(struct drm_dp_mst_topology_mgr *mgr) | |||
| 1667 | { | |||
| 1668 | mutex_lock(&mgr->topology_ref_history_lock)rw_enter_write(&mgr->topology_ref_history_lock); | |||
| 1669 | } | |||
| 1670 | ||||
| 1671 | static inline void | |||
| 1672 | topology_ref_history_unlock(struct drm_dp_mst_topology_mgr *mgr) | |||
| 1673 | { | |||
| 1674 | mutex_unlock(&mgr->topology_ref_history_lock)rw_exit_write(&mgr->topology_ref_history_lock); | |||
| 1675 | } | |||
| 1676 | #else | |||
| 1677 | static inline void | |||
| 1678 | topology_ref_history_lock(struct drm_dp_mst_topology_mgr *mgr) {} | |||
| 1679 | static inline void | |||
| 1680 | topology_ref_history_unlock(struct drm_dp_mst_topology_mgr *mgr) {} | |||
| 1681 | static inline void | |||
| 1682 | drm_dp_mst_dump_mstb_topology_history(struct drm_dp_mst_branch *mstb) {} | |||
| 1683 | static inline void | |||
| 1684 | drm_dp_mst_dump_port_topology_history(struct drm_dp_mst_port *port) {} | |||
| 1685 | #define save_mstb_topology_ref(mstb, type) | |||
| 1686 | #define save_port_topology_ref(port, type) | |||
| 1687 | #endif | |||
| 1688 | ||||
| 1689 | struct drm_dp_mst_atomic_payload * | |||
| 1690 | drm_atomic_get_mst_payload_state(struct drm_dp_mst_topology_state *state, | |||
| 1691 | struct drm_dp_mst_port *port) | |||
| 1692 | { | |||
| 1693 | struct drm_dp_mst_atomic_payload *payload; | |||
| 1694 | ||||
| 1695 | list_for_each_entry(payload, &state->payloads, next)for (payload = ({ const __typeof( ((__typeof(*payload) *)0)-> next ) *__mptr = ((&state->payloads)->next); (__typeof (*payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(* payload), next) );}); &payload->next != (&state-> payloads); payload = ({ const __typeof( ((__typeof(*payload) * )0)->next ) *__mptr = (payload->next.next); (__typeof(* payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(*payload ), next) );})) | |||
| 1696 | if (payload->port == port) | |||
| 1697 | return payload; | |||
| 1698 | ||||
| 1699 | return NULL((void *)0); | |||
| 1700 | } | |||
| 1701 | EXPORT_SYMBOL(drm_atomic_get_mst_payload_state); | |||
| 1702 | ||||
| 1703 | static void drm_dp_destroy_mst_branch_device(struct kref *kref) | |||
| 1704 | { | |||
| 1705 | struct drm_dp_mst_branch *mstb = | |||
| 1706 | container_of(kref, struct drm_dp_mst_branch, topology_kref)({ const __typeof( ((struct drm_dp_mst_branch *)0)->topology_kref ) *__mptr = (kref); (struct drm_dp_mst_branch *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_branch, topology_kref ) );}); | |||
| 1707 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; | |||
| 1708 | ||||
| 1709 | drm_dp_mst_dump_mstb_topology_history(mstb); | |||
| 1710 | ||||
| 1711 | INIT_LIST_HEAD(&mstb->destroy_next); | |||
| 1712 | ||||
| 1713 | /* | |||
| 1714 | * This can get called under mgr->mutex, so we need to perform the | |||
| 1715 | * actual destruction of the mstb in another worker | |||
| 1716 | */ | |||
| 1717 | mutex_lock(&mgr->delayed_destroy_lock)rw_enter_write(&mgr->delayed_destroy_lock); | |||
| 1718 | list_add(&mstb->destroy_next, &mgr->destroy_branch_device_list); | |||
| 1719 | mutex_unlock(&mgr->delayed_destroy_lock)rw_exit_write(&mgr->delayed_destroy_lock); | |||
| 1720 | queue_work(mgr->delayed_destroy_wq, &mgr->delayed_destroy_work); | |||
| 1721 | } | |||
| 1722 | ||||
| 1723 | /** | |||
| 1724 | * drm_dp_mst_topology_try_get_mstb() - Increment the topology refcount of a | |||
| 1725 | * branch device unless it's zero | |||
| 1726 | * @mstb: &struct drm_dp_mst_branch to increment the topology refcount of | |||
| 1727 | * | |||
| 1728 | * Attempts to grab a topology reference to @mstb, if it hasn't yet been | |||
| 1729 | * removed from the topology (e.g. &drm_dp_mst_branch.topology_kref has | |||
| 1730 | * reached 0). Holding a topology reference implies that a malloc reference | |||
| 1731 | * will be held to @mstb as long as the user holds the topology reference. | |||
| 1732 | * | |||
| 1733 | * Care should be taken to ensure that the user has at least one malloc | |||
| 1734 | * reference to @mstb. If you already have a topology reference to @mstb, you | |||
| 1735 | * should use drm_dp_mst_topology_get_mstb() instead. | |||
| 1736 | * | |||
| 1737 | * See also: | |||
| 1738 | * drm_dp_mst_topology_get_mstb() | |||
| 1739 | * drm_dp_mst_topology_put_mstb() | |||
| 1740 | * | |||
| 1741 | * Returns: | |||
| 1742 | * * 1: A topology reference was grabbed successfully | |||
| 1743 | * * 0: @port is no longer in the topology, no reference was grabbed | |||
| 1744 | */ | |||
| 1745 | static int __must_check | |||
| 1746 | drm_dp_mst_topology_try_get_mstb(struct drm_dp_mst_branch *mstb) | |||
| 1747 | { | |||
| 1748 | int ret; | |||
| 1749 | ||||
| 1750 | topology_ref_history_lock(mstb->mgr); | |||
| 1751 | ret = kref_get_unless_zero(&mstb->topology_kref); | |||
| 1752 | if (ret) { | |||
| 1753 | drm_dbg(mstb->mgr->dev, "mstb %p (%d)\n", mstb, kref_read(&mstb->topology_kref))__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "mstb %p (%d)\n" , mstb, kref_read(&mstb->topology_kref)); | |||
| 1754 | save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_GET); | |||
| 1755 | } | |||
| 1756 | ||||
| 1757 | topology_ref_history_unlock(mstb->mgr); | |||
| 1758 | ||||
| 1759 | return ret; | |||
| 1760 | } | |||
| 1761 | ||||
| 1762 | /** | |||
| 1763 | * drm_dp_mst_topology_get_mstb() - Increment the topology refcount of a | |||
| 1764 | * branch device | |||
| 1765 | * @mstb: The &struct drm_dp_mst_branch to increment the topology refcount of | |||
| 1766 | * | |||
| 1767 | * Increments &drm_dp_mst_branch.topology_refcount without checking whether or | |||
| 1768 | * not it's already reached 0. This is only valid to use in scenarios where | |||
| 1769 | * you are already guaranteed to have at least one active topology reference | |||
| 1770 | * to @mstb. Otherwise, drm_dp_mst_topology_try_get_mstb() must be used. | |||
| 1771 | * | |||
| 1772 | * See also: | |||
| 1773 | * drm_dp_mst_topology_try_get_mstb() | |||
| 1774 | * drm_dp_mst_topology_put_mstb() | |||
| 1775 | */ | |||
| 1776 | static void drm_dp_mst_topology_get_mstb(struct drm_dp_mst_branch *mstb) | |||
| 1777 | { | |||
| 1778 | topology_ref_history_lock(mstb->mgr); | |||
| 1779 | ||||
| 1780 | save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_GET); | |||
| 1781 | WARN_ON(kref_read(&mstb->topology_kref) == 0)({ int __ret = !!(kref_read(&mstb->topology_kref) == 0 ); if (__ret) printf("WARNING %s failed at %s:%d\n", "kref_read(&mstb->topology_kref) == 0" , "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c", 1781 ); __builtin_expect(!!(__ret), 0); }); | |||
| 1782 | kref_get(&mstb->topology_kref); | |||
| 1783 | drm_dbg(mstb->mgr->dev, "mstb %p (%d)\n", mstb, kref_read(&mstb->topology_kref))__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "mstb %p (%d)\n" , mstb, kref_read(&mstb->topology_kref)); | |||
| 1784 | ||||
| 1785 | topology_ref_history_unlock(mstb->mgr); | |||
| 1786 | } | |||
| 1787 | ||||
| 1788 | /** | |||
| 1789 | * drm_dp_mst_topology_put_mstb() - release a topology reference to a branch | |||
| 1790 | * device | |||
| 1791 | * @mstb: The &struct drm_dp_mst_branch to release the topology reference from | |||
| 1792 | * | |||
| 1793 | * Releases a topology reference from @mstb by decrementing | |||
| 1794 | * &drm_dp_mst_branch.topology_kref. | |||
| 1795 | * | |||
| 1796 | * See also: | |||
| 1797 | * drm_dp_mst_topology_try_get_mstb() | |||
| 1798 | * drm_dp_mst_topology_get_mstb() | |||
| 1799 | */ | |||
| 1800 | static void | |||
| 1801 | drm_dp_mst_topology_put_mstb(struct drm_dp_mst_branch *mstb) | |||
| 1802 | { | |||
| 1803 | topology_ref_history_lock(mstb->mgr); | |||
| 1804 | ||||
| 1805 | drm_dbg(mstb->mgr->dev, "mstb %p (%d)\n", mstb, kref_read(&mstb->topology_kref) - 1)__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "mstb %p (%d)\n" , mstb, kref_read(&mstb->topology_kref) - 1); | |||
| 1806 | save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_PUT); | |||
| 1807 | ||||
| 1808 | topology_ref_history_unlock(mstb->mgr); | |||
| 1809 | kref_put(&mstb->topology_kref, drm_dp_destroy_mst_branch_device); | |||
| 1810 | } | |||
| 1811 | ||||
| 1812 | static void drm_dp_destroy_port(struct kref *kref) | |||
| 1813 | { | |||
| 1814 | struct drm_dp_mst_port *port = | |||
| 1815 | container_of(kref, struct drm_dp_mst_port, topology_kref)({ const __typeof( ((struct drm_dp_mst_port *)0)->topology_kref ) *__mptr = (kref); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_port, topology_kref) ) ;}); | |||
| 1816 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; | |||
| 1817 | ||||
| 1818 | drm_dp_mst_dump_port_topology_history(port); | |||
| 1819 | ||||
| 1820 | /* There's nothing that needs locking to destroy an input port yet */ | |||
| 1821 | if (port->input) { | |||
| 1822 | drm_dp_mst_put_port_malloc(port); | |||
| 1823 | return; | |||
| 1824 | } | |||
| 1825 | ||||
| 1826 | kfree(port->cached_edid); | |||
| 1827 | ||||
| 1828 | /* | |||
| 1829 | * we can't destroy the connector here, as we might be holding the | |||
| 1830 | * mode_config.mutex from an EDID retrieval | |||
| 1831 | */ | |||
| 1832 | mutex_lock(&mgr->delayed_destroy_lock)rw_enter_write(&mgr->delayed_destroy_lock); | |||
| 1833 | list_add(&port->next, &mgr->destroy_port_list); | |||
| 1834 | mutex_unlock(&mgr->delayed_destroy_lock)rw_exit_write(&mgr->delayed_destroy_lock); | |||
| 1835 | queue_work(mgr->delayed_destroy_wq, &mgr->delayed_destroy_work); | |||
| 1836 | } | |||
| 1837 | ||||
| 1838 | /** | |||
| 1839 | * drm_dp_mst_topology_try_get_port() - Increment the topology refcount of a | |||
| 1840 | * port unless it's zero | |||
| 1841 | * @port: &struct drm_dp_mst_port to increment the topology refcount of | |||
| 1842 | * | |||
| 1843 | * Attempts to grab a topology reference to @port, if it hasn't yet been | |||
| 1844 | * removed from the topology (e.g. &drm_dp_mst_port.topology_kref has reached | |||
| 1845 | * 0). Holding a topology reference implies that a malloc reference will be | |||
| 1846 | * held to @port as long as the user holds the topology reference. | |||
| 1847 | * | |||
| 1848 | * Care should be taken to ensure that the user has at least one malloc | |||
| 1849 | * reference to @port. If you already have a topology reference to @port, you | |||
| 1850 | * should use drm_dp_mst_topology_get_port() instead. | |||
| 1851 | * | |||
| 1852 | * See also: | |||
| 1853 | * drm_dp_mst_topology_get_port() | |||
| 1854 | * drm_dp_mst_topology_put_port() | |||
| 1855 | * | |||
| 1856 | * Returns: | |||
| 1857 | * * 1: A topology reference was grabbed successfully | |||
| 1858 | * * 0: @port is no longer in the topology, no reference was grabbed | |||
| 1859 | */ | |||
| 1860 | static int __must_check | |||
| 1861 | drm_dp_mst_topology_try_get_port(struct drm_dp_mst_port *port) | |||
| 1862 | { | |||
| 1863 | int ret; | |||
| 1864 | ||||
| 1865 | topology_ref_history_lock(port->mgr); | |||
| 1866 | ret = kref_get_unless_zero(&port->topology_kref); | |||
| 1867 | if (ret) { | |||
| 1868 | drm_dbg(port->mgr->dev, "port %p (%d)\n", port, kref_read(&port->topology_kref))__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "port %p (%d)\n" , port, kref_read(&port->topology_kref)); | |||
| 1869 | save_port_topology_ref(port, DRM_DP_MST_TOPOLOGY_REF_GET); | |||
| 1870 | } | |||
| 1871 | ||||
| 1872 | topology_ref_history_unlock(port->mgr); | |||
| 1873 | return ret; | |||
| 1874 | } | |||
| 1875 | ||||
| 1876 | /** | |||
| 1877 | * drm_dp_mst_topology_get_port() - Increment the topology refcount of a port | |||
| 1878 | * @port: The &struct drm_dp_mst_port to increment the topology refcount of | |||
| 1879 | * | |||
| 1880 | * Increments &drm_dp_mst_port.topology_refcount without checking whether or | |||
| 1881 | * not it's already reached 0. This is only valid to use in scenarios where | |||
| 1882 | * you are already guaranteed to have at least one active topology reference | |||
| 1883 | * to @port. Otherwise, drm_dp_mst_topology_try_get_port() must be used. | |||
| 1884 | * | |||
| 1885 | * See also: | |||
| 1886 | * drm_dp_mst_topology_try_get_port() | |||
| 1887 | * drm_dp_mst_topology_put_port() | |||
| 1888 | */ | |||
| 1889 | static void drm_dp_mst_topology_get_port(struct drm_dp_mst_port *port) | |||
| 1890 | { | |||
| 1891 | topology_ref_history_lock(port->mgr); | |||
| 1892 | ||||
| 1893 | WARN_ON(kref_read(&port->topology_kref) == 0)({ int __ret = !!(kref_read(&port->topology_kref) == 0 ); if (__ret) printf("WARNING %s failed at %s:%d\n", "kref_read(&port->topology_kref) == 0" , "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c", 1893 ); __builtin_expect(!!(__ret), 0); }); | |||
| 1894 | kref_get(&port->topology_kref); | |||
| 1895 | drm_dbg(port->mgr->dev, "port %p (%d)\n", port, kref_read(&port->topology_kref))__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "port %p (%d)\n" , port, kref_read(&port->topology_kref)); | |||
| 1896 | save_port_topology_ref(port, DRM_DP_MST_TOPOLOGY_REF_GET); | |||
| 1897 | ||||
| 1898 | topology_ref_history_unlock(port->mgr); | |||
| 1899 | } | |||
| 1900 | ||||
| 1901 | /** | |||
| 1902 | * drm_dp_mst_topology_put_port() - release a topology reference to a port | |||
| 1903 | * @port: The &struct drm_dp_mst_port to release the topology reference from | |||
| 1904 | * | |||
| 1905 | * Releases a topology reference from @port by decrementing | |||
| 1906 | * &drm_dp_mst_port.topology_kref. | |||
| 1907 | * | |||
| 1908 | * See also: | |||
| 1909 | * drm_dp_mst_topology_try_get_port() | |||
| 1910 | * drm_dp_mst_topology_get_port() | |||
| 1911 | */ | |||
| 1912 | static void drm_dp_mst_topology_put_port(struct drm_dp_mst_port *port) | |||
| 1913 | { | |||
| 1914 | topology_ref_history_lock(port->mgr); | |||
| 1915 | ||||
| 1916 | drm_dbg(port->mgr->dev, "port %p (%d)\n", port, kref_read(&port->topology_kref) - 1)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_DRIVER, "port %p (%d)\n" , port, kref_read(&port->topology_kref) - 1); | |||
| 1917 | save_port_topology_ref(port, DRM_DP_MST_TOPOLOGY_REF_PUT); | |||
| 1918 | ||||
| 1919 | topology_ref_history_unlock(port->mgr); | |||
| 1920 | kref_put(&port->topology_kref, drm_dp_destroy_port); | |||
| 1921 | } | |||
| 1922 | ||||
| 1923 | static struct drm_dp_mst_branch * | |||
| 1924 | drm_dp_mst_topology_get_mstb_validated_locked(struct drm_dp_mst_branch *mstb, | |||
| 1925 | struct drm_dp_mst_branch *to_find) | |||
| 1926 | { | |||
| 1927 | struct drm_dp_mst_port *port; | |||
| 1928 | struct drm_dp_mst_branch *rmstb; | |||
| 1929 | ||||
| 1930 | if (to_find == mstb) | |||
| 1931 | return mstb; | |||
| 1932 | ||||
| 1933 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 1934 | if (port->mstb) { | |||
| 1935 | rmstb = drm_dp_mst_topology_get_mstb_validated_locked( | |||
| 1936 | port->mstb, to_find); | |||
| 1937 | if (rmstb) | |||
| 1938 | return rmstb; | |||
| 1939 | } | |||
| 1940 | } | |||
| 1941 | return NULL((void *)0); | |||
| 1942 | } | |||
| 1943 | ||||
| 1944 | static struct drm_dp_mst_branch * | |||
| 1945 | drm_dp_mst_topology_get_mstb_validated(struct drm_dp_mst_topology_mgr *mgr, | |||
| 1946 | struct drm_dp_mst_branch *mstb) | |||
| 1947 | { | |||
| 1948 | struct drm_dp_mst_branch *rmstb = NULL((void *)0); | |||
| 1949 | ||||
| 1950 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 1951 | if (mgr->mst_primary) { | |||
| 1952 | rmstb = drm_dp_mst_topology_get_mstb_validated_locked( | |||
| 1953 | mgr->mst_primary, mstb); | |||
| 1954 | ||||
| 1955 | if (rmstb && !drm_dp_mst_topology_try_get_mstb(rmstb)) | |||
| 1956 | rmstb = NULL((void *)0); | |||
| 1957 | } | |||
| 1958 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 1959 | return rmstb; | |||
| 1960 | } | |||
| 1961 | ||||
| 1962 | static struct drm_dp_mst_port * | |||
| 1963 | drm_dp_mst_topology_get_port_validated_locked(struct drm_dp_mst_branch *mstb, | |||
| 1964 | struct drm_dp_mst_port *to_find) | |||
| 1965 | { | |||
| 1966 | struct drm_dp_mst_port *port, *mport; | |||
| 1967 | ||||
| 1968 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 1969 | if (port == to_find) | |||
| 1970 | return port; | |||
| 1971 | ||||
| 1972 | if (port->mstb) { | |||
| 1973 | mport = drm_dp_mst_topology_get_port_validated_locked( | |||
| 1974 | port->mstb, to_find); | |||
| 1975 | if (mport) | |||
| 1976 | return mport; | |||
| 1977 | } | |||
| 1978 | } | |||
| 1979 | return NULL((void *)0); | |||
| 1980 | } | |||
| 1981 | ||||
| 1982 | static struct drm_dp_mst_port * | |||
| 1983 | drm_dp_mst_topology_get_port_validated(struct drm_dp_mst_topology_mgr *mgr, | |||
| 1984 | struct drm_dp_mst_port *port) | |||
| 1985 | { | |||
| 1986 | struct drm_dp_mst_port *rport = NULL((void *)0); | |||
| 1987 | ||||
| 1988 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 1989 | if (mgr->mst_primary) { | |||
| 1990 | rport = drm_dp_mst_topology_get_port_validated_locked( | |||
| 1991 | mgr->mst_primary, port); | |||
| 1992 | ||||
| 1993 | if (rport && !drm_dp_mst_topology_try_get_port(rport)) | |||
| 1994 | rport = NULL((void *)0); | |||
| 1995 | } | |||
| 1996 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 1997 | return rport; | |||
| 1998 | } | |||
| 1999 | ||||
| 2000 | static struct drm_dp_mst_port *drm_dp_get_port(struct drm_dp_mst_branch *mstb, u8 port_num) | |||
| 2001 | { | |||
| 2002 | struct drm_dp_mst_port *port; | |||
| 2003 | int ret; | |||
| 2004 | ||||
| 2005 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 2006 | if (port->port_num == port_num) { | |||
| 2007 | ret = drm_dp_mst_topology_try_get_port(port); | |||
| 2008 | return ret ? port : NULL((void *)0); | |||
| 2009 | } | |||
| 2010 | } | |||
| 2011 | ||||
| 2012 | return NULL((void *)0); | |||
| 2013 | } | |||
| 2014 | ||||
| 2015 | /* | |||
| 2016 | * calculate a new RAD for this MST branch device | |||
| 2017 | * if parent has an LCT of 2 then it has 1 nibble of RAD, | |||
| 2018 | * if parent has an LCT of 3 then it has 2 nibbles of RAD, | |||
| 2019 | */ | |||
| 2020 | static u8 drm_dp_calculate_rad(struct drm_dp_mst_port *port, | |||
| 2021 | u8 *rad) | |||
| 2022 | { | |||
| 2023 | int parent_lct = port->parent->lct; | |||
| 2024 | int shift = 4; | |||
| 2025 | int idx = (parent_lct - 1) / 2; | |||
| 2026 | ||||
| 2027 | if (parent_lct > 1) { | |||
| 2028 | memcpy(rad, port->parent->rad, idx + 1)__builtin_memcpy((rad), (port->parent->rad), (idx + 1)); | |||
| 2029 | shift = (parent_lct % 2) ? 4 : 0; | |||
| 2030 | } else | |||
| 2031 | rad[0] = 0; | |||
| 2032 | ||||
| 2033 | rad[idx] |= port->port_num << shift; | |||
| 2034 | return parent_lct + 1; | |||
| 2035 | } | |||
| 2036 | ||||
| 2037 | static bool_Bool drm_dp_mst_is_end_device(u8 pdt, bool_Bool mcs) | |||
| 2038 | { | |||
| 2039 | switch (pdt) { | |||
| 2040 | case DP_PEER_DEVICE_DP_LEGACY_CONV0x4: | |||
| 2041 | case DP_PEER_DEVICE_SST_SINK0x3: | |||
| 2042 | return true1; | |||
| 2043 | case DP_PEER_DEVICE_MST_BRANCHING0x2: | |||
| 2044 | /* For sst branch device */ | |||
| 2045 | if (!mcs) | |||
| 2046 | return true1; | |||
| 2047 | ||||
| 2048 | return false0; | |||
| 2049 | } | |||
| 2050 | return true1; | |||
| 2051 | } | |||
| 2052 | ||||
| 2053 | static int | |||
| 2054 | drm_dp_port_set_pdt(struct drm_dp_mst_port *port, u8 new_pdt, | |||
| 2055 | bool_Bool new_mcs) | |||
| 2056 | { | |||
| 2057 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; | |||
| 2058 | struct drm_dp_mst_branch *mstb; | |||
| 2059 | u8 rad[8], lct; | |||
| 2060 | int ret = 0; | |||
| 2061 | ||||
| 2062 | if (port->pdt == new_pdt && port->mcs == new_mcs) | |||
| 2063 | return 0; | |||
| 2064 | ||||
| 2065 | /* Teardown the old pdt, if there is one */ | |||
| 2066 | if (port->pdt != DP_PEER_DEVICE_NONE0x0) { | |||
| 2067 | if (drm_dp_mst_is_end_device(port->pdt, port->mcs)) { | |||
| 2068 | /* | |||
| 2069 | * If the new PDT would also have an i2c bus, | |||
| 2070 | * don't bother with reregistering it | |||
| 2071 | */ | |||
| 2072 | if (new_pdt != DP_PEER_DEVICE_NONE0x0 && | |||
| 2073 | drm_dp_mst_is_end_device(new_pdt, new_mcs)) { | |||
| 2074 | port->pdt = new_pdt; | |||
| 2075 | port->mcs = new_mcs; | |||
| 2076 | return 0; | |||
| 2077 | } | |||
| 2078 | ||||
| 2079 | /* remove i2c over sideband */ | |||
| 2080 | drm_dp_mst_unregister_i2c_bus(port); | |||
| 2081 | } else { | |||
| 2082 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2083 | drm_dp_mst_topology_put_mstb(port->mstb); | |||
| 2084 | port->mstb = NULL((void *)0); | |||
| 2085 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2086 | } | |||
| 2087 | } | |||
| 2088 | ||||
| 2089 | port->pdt = new_pdt; | |||
| 2090 | port->mcs = new_mcs; | |||
| 2091 | ||||
| 2092 | if (port->pdt != DP_PEER_DEVICE_NONE0x0) { | |||
| 2093 | if (drm_dp_mst_is_end_device(port->pdt, port->mcs)) { | |||
| 2094 | /* add i2c over sideband */ | |||
| 2095 | ret = drm_dp_mst_register_i2c_bus(port); | |||
| 2096 | } else { | |||
| 2097 | lct = drm_dp_calculate_rad(port, rad); | |||
| 2098 | mstb = drm_dp_add_mst_branch_device(lct, rad); | |||
| 2099 | if (!mstb) { | |||
| 2100 | ret = -ENOMEM12; | |||
| 2101 | drm_err(mgr->dev, "Failed to create MSTB for port %p", port)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to create MSTB for port %p" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port); | |||
| 2102 | goto out; | |||
| 2103 | } | |||
| 2104 | ||||
| 2105 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2106 | port->mstb = mstb; | |||
| 2107 | mstb->mgr = port->mgr; | |||
| 2108 | mstb->port_parent = port; | |||
| 2109 | ||||
| 2110 | /* | |||
| 2111 | * Make sure this port's memory allocation stays | |||
| 2112 | * around until its child MSTB releases it | |||
| 2113 | */ | |||
| 2114 | drm_dp_mst_get_port_malloc(port); | |||
| 2115 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2116 | ||||
| 2117 | /* And make sure we send a link address for this */ | |||
| 2118 | ret = 1; | |||
| 2119 | } | |||
| 2120 | } | |||
| 2121 | ||||
| 2122 | out: | |||
| 2123 | if (ret < 0) | |||
| 2124 | port->pdt = DP_PEER_DEVICE_NONE0x0; | |||
| 2125 | return ret; | |||
| 2126 | } | |||
| 2127 | ||||
| 2128 | /** | |||
| 2129 | * drm_dp_mst_dpcd_read() - read a series of bytes from the DPCD via sideband | |||
| 2130 | * @aux: Fake sideband AUX CH | |||
| 2131 | * @offset: address of the (first) register to read | |||
| 2132 | * @buffer: buffer to store the register values | |||
| 2133 | * @size: number of bytes in @buffer | |||
| 2134 | * | |||
| 2135 | * Performs the same functionality for remote devices via | |||
| 2136 | * sideband messaging as drm_dp_dpcd_read() does for local | |||
| 2137 | * devices via actual AUX CH. | |||
| 2138 | * | |||
| 2139 | * Return: Number of bytes read, or negative error code on failure. | |||
| 2140 | */ | |||
| 2141 | ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux, | |||
| 2142 | unsigned int offset, void *buffer, size_t size) | |||
| 2143 | { | |||
| 2144 | struct drm_dp_mst_port *port = container_of(aux, struct drm_dp_mst_port,({ const __typeof( ((struct drm_dp_mst_port *)0)->aux ) *__mptr = (aux); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_port, aux) );}) | |||
| 2145 | aux)({ const __typeof( ((struct drm_dp_mst_port *)0)->aux ) *__mptr = (aux); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_port, aux) );}); | |||
| 2146 | ||||
| 2147 | return drm_dp_send_dpcd_read(port->mgr, port, | |||
| 2148 | offset, size, buffer); | |||
| 2149 | } | |||
| 2150 | ||||
| 2151 | /** | |||
| 2152 | * drm_dp_mst_dpcd_write() - write a series of bytes to the DPCD via sideband | |||
| 2153 | * @aux: Fake sideband AUX CH | |||
| 2154 | * @offset: address of the (first) register to write | |||
| 2155 | * @buffer: buffer containing the values to write | |||
| 2156 | * @size: number of bytes in @buffer | |||
| 2157 | * | |||
| 2158 | * Performs the same functionality for remote devices via | |||
| 2159 | * sideband messaging as drm_dp_dpcd_write() does for local | |||
| 2160 | * devices via actual AUX CH. | |||
| 2161 | * | |||
| 2162 | * Return: number of bytes written on success, negative error code on failure. | |||
| 2163 | */ | |||
| 2164 | ssize_t drm_dp_mst_dpcd_write(struct drm_dp_aux *aux, | |||
| 2165 | unsigned int offset, void *buffer, size_t size) | |||
| 2166 | { | |||
| 2167 | struct drm_dp_mst_port *port = container_of(aux, struct drm_dp_mst_port,({ const __typeof( ((struct drm_dp_mst_port *)0)->aux ) *__mptr = (aux); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_port, aux) );}) | |||
| 2168 | aux)({ const __typeof( ((struct drm_dp_mst_port *)0)->aux ) *__mptr = (aux); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_port, aux) );}); | |||
| 2169 | ||||
| 2170 | return drm_dp_send_dpcd_write(port->mgr, port, | |||
| 2171 | offset, size, buffer); | |||
| 2172 | } | |||
| 2173 | ||||
| 2174 | static int drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid) | |||
| 2175 | { | |||
| 2176 | int ret = 0; | |||
| 2177 | ||||
| 2178 | memcpy(mstb->guid, guid, 16)__builtin_memcpy((mstb->guid), (guid), (16)); | |||
| 2179 | ||||
| 2180 | if (!drm_dp_validate_guid(mstb->mgr, mstb->guid)) { | |||
| 2181 | if (mstb->port_parent) { | |||
| 2182 | ret = drm_dp_send_dpcd_write(mstb->mgr, | |||
| 2183 | mstb->port_parent, | |||
| 2184 | DP_GUID0x030, 16, mstb->guid); | |||
| 2185 | } else { | |||
| 2186 | ret = drm_dp_dpcd_write(mstb->mgr->aux, | |||
| 2187 | DP_GUID0x030, mstb->guid, 16); | |||
| 2188 | } | |||
| 2189 | } | |||
| 2190 | ||||
| 2191 | if (ret < 16 && ret > 0) | |||
| 2192 | return -EPROTO95; | |||
| 2193 | ||||
| 2194 | return ret == 16 ? 0 : ret; | |||
| 2195 | } | |||
| 2196 | ||||
| 2197 | static void build_mst_prop_path(const struct drm_dp_mst_branch *mstb, | |||
| 2198 | int pnum, | |||
| 2199 | char *proppath, | |||
| 2200 | size_t proppath_size) | |||
| 2201 | { | |||
| 2202 | int i; | |||
| 2203 | char temp[8]; | |||
| 2204 | ||||
| 2205 | snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id); | |||
| 2206 | for (i = 0; i < (mstb->lct - 1); i++) { | |||
| 2207 | int shift = (i % 2) ? 0 : 4; | |||
| 2208 | int port_num = (mstb->rad[i / 2] >> shift) & 0xf; | |||
| 2209 | ||||
| 2210 | snprintf(temp, sizeof(temp), "-%d", port_num); | |||
| 2211 | strlcat(proppath, temp, proppath_size); | |||
| 2212 | } | |||
| 2213 | snprintf(temp, sizeof(temp), "-%d", pnum); | |||
| 2214 | strlcat(proppath, temp, proppath_size); | |||
| 2215 | } | |||
| 2216 | ||||
| 2217 | /** | |||
| 2218 | * drm_dp_mst_connector_late_register() - Late MST connector registration | |||
| 2219 | * @connector: The MST connector | |||
| 2220 | * @port: The MST port for this connector | |||
| 2221 | * | |||
| 2222 | * Helper to register the remote aux device for this MST port. Drivers should | |||
| 2223 | * call this from their mst connector's late_register hook to enable MST aux | |||
| 2224 | * devices. | |||
| 2225 | * | |||
| 2226 | * Return: 0 on success, negative error code on failure. | |||
| 2227 | */ | |||
| 2228 | int drm_dp_mst_connector_late_register(struct drm_connector *connector, | |||
| 2229 | struct drm_dp_mst_port *port) | |||
| 2230 | { | |||
| 2231 | #ifdef __linux__ | |||
| 2232 | drm_dbg_kms(port->mgr->dev, "registering %s remote bus for %s\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "registering %s remote bus for %s\n" , port->aux.name, connector->kdev->kobj.name) | |||
| 2233 | port->aux.name, connector->kdev->kobj.name)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "registering %s remote bus for %s\n" , port->aux.name, connector->kdev->kobj.name); | |||
| 2234 | #else | |||
| 2235 | drm_dbg_kms(port->mgr->dev, "registering %s remote bus\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "registering %s remote bus\n" , port->aux.name) | |||
| 2236 | port->aux.name)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "registering %s remote bus\n" , port->aux.name); | |||
| 2237 | #endif | |||
| 2238 | ||||
| 2239 | port->aux.dev = connector->kdev; | |||
| 2240 | return drm_dp_aux_register_devnode(&port->aux); | |||
| 2241 | } | |||
| 2242 | EXPORT_SYMBOL(drm_dp_mst_connector_late_register); | |||
| 2243 | ||||
| 2244 | /** | |||
| 2245 | * drm_dp_mst_connector_early_unregister() - Early MST connector unregistration | |||
| 2246 | * @connector: The MST connector | |||
| 2247 | * @port: The MST port for this connector | |||
| 2248 | * | |||
| 2249 | * Helper to unregister the remote aux device for this MST port, registered by | |||
| 2250 | * drm_dp_mst_connector_late_register(). Drivers should call this from their mst | |||
| 2251 | * connector's early_unregister hook. | |||
| 2252 | */ | |||
| 2253 | void drm_dp_mst_connector_early_unregister(struct drm_connector *connector, | |||
| 2254 | struct drm_dp_mst_port *port) | |||
| 2255 | { | |||
| 2256 | #ifdef __linux__ | |||
| 2257 | drm_dbg_kms(port->mgr->dev, "unregistering %s remote bus for %s\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "unregistering %s remote bus for %s\n" , port->aux.name, connector->kdev->kobj.name) | |||
| 2258 | port->aux.name, connector->kdev->kobj.name)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "unregistering %s remote bus for %s\n" , port->aux.name, connector->kdev->kobj.name); | |||
| 2259 | #else | |||
| 2260 | drm_dbg_kms(port->mgr->dev, "unregistering %s remote bus\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "unregistering %s remote bus\n" , port->aux.name) | |||
| 2261 | port->aux.name)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_KMS, "unregistering %s remote bus\n" , port->aux.name); | |||
| 2262 | #endif | |||
| 2263 | drm_dp_aux_unregister_devnode(&port->aux); | |||
| 2264 | } | |||
| 2265 | EXPORT_SYMBOL(drm_dp_mst_connector_early_unregister); | |||
| 2266 | ||||
| 2267 | static void | |||
| 2268 | drm_dp_mst_port_add_connector(struct drm_dp_mst_branch *mstb, | |||
| 2269 | struct drm_dp_mst_port *port) | |||
| 2270 | { | |||
| 2271 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; | |||
| 2272 | char proppath[255]; | |||
| 2273 | int ret; | |||
| 2274 | ||||
| 2275 | build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath)); | |||
| 2276 | port->connector = mgr->cbs->add_connector(mgr, port, proppath); | |||
| 2277 | if (!port->connector) { | |||
| 2278 | ret = -ENOMEM12; | |||
| 2279 | goto error; | |||
| 2280 | } | |||
| 2281 | ||||
| 2282 | if (port->pdt != DP_PEER_DEVICE_NONE0x0 && | |||
| 2283 | drm_dp_mst_is_end_device(port->pdt, port->mcs) && | |||
| 2284 | port->port_num >= DP_MST_LOGICAL_PORT_08) | |||
| 2285 | port->cached_edid = drm_get_edid(port->connector, | |||
| 2286 | &port->aux.ddc); | |||
| 2287 | ||||
| 2288 | drm_connector_register(port->connector); | |||
| 2289 | return; | |||
| 2290 | ||||
| 2291 | error: | |||
| 2292 | drm_err(mgr->dev, "Failed to create connector for port %p: %d\n", port, ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to create connector for port %p: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port, ret ); | |||
| 2293 | } | |||
| 2294 | ||||
| 2295 | /* | |||
| 2296 | * Drop a topology reference, and unlink the port from the in-memory topology | |||
| 2297 | * layout | |||
| 2298 | */ | |||
| 2299 | static void | |||
| 2300 | drm_dp_mst_topology_unlink_port(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2301 | struct drm_dp_mst_port *port) | |||
| 2302 | { | |||
| 2303 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2304 | port->parent->num_ports--; | |||
| 2305 | list_del(&port->next); | |||
| 2306 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2307 | drm_dp_mst_topology_put_port(port); | |||
| 2308 | } | |||
| 2309 | ||||
| 2310 | static struct drm_dp_mst_port * | |||
| 2311 | drm_dp_mst_add_port(struct drm_device *dev, | |||
| 2312 | struct drm_dp_mst_topology_mgr *mgr, | |||
| 2313 | struct drm_dp_mst_branch *mstb, u8 port_number) | |||
| 2314 | { | |||
| 2315 | struct drm_dp_mst_port *port = kzalloc(sizeof(*port), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 2316 | ||||
| 2317 | if (!port) | |||
| 2318 | return NULL((void *)0); | |||
| 2319 | ||||
| 2320 | kref_init(&port->topology_kref); | |||
| 2321 | kref_init(&port->malloc_kref); | |||
| 2322 | port->parent = mstb; | |||
| 2323 | port->port_num = port_number; | |||
| 2324 | port->mgr = mgr; | |||
| 2325 | port->aux.name = "DPMST"; | |||
| 2326 | port->aux.dev = dev->dev; | |||
| 2327 | port->aux.is_remote = true1; | |||
| 2328 | ||||
| 2329 | /* initialize the MST downstream port's AUX crc work queue */ | |||
| 2330 | port->aux.drm_dev = dev; | |||
| 2331 | drm_dp_remote_aux_init(&port->aux); | |||
| 2332 | ||||
| 2333 | /* | |||
| 2334 | * Make sure the memory allocation for our parent branch stays | |||
| 2335 | * around until our own memory allocation is released | |||
| 2336 | */ | |||
| 2337 | drm_dp_mst_get_mstb_malloc(mstb); | |||
| 2338 | ||||
| 2339 | return port; | |||
| 2340 | } | |||
| 2341 | ||||
| 2342 | static int | |||
| 2343 | drm_dp_mst_handle_link_address_port(struct drm_dp_mst_branch *mstb, | |||
| 2344 | struct drm_device *dev, | |||
| 2345 | struct drm_dp_link_addr_reply_port *port_msg) | |||
| 2346 | { | |||
| 2347 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; | |||
| 2348 | struct drm_dp_mst_port *port; | |||
| 2349 | int old_ddps = 0, ret; | |||
| 2350 | u8 new_pdt = DP_PEER_DEVICE_NONE0x0; | |||
| 2351 | bool_Bool new_mcs = 0; | |||
| 2352 | bool_Bool created = false0, send_link_addr = false0, changed = false0; | |||
| 2353 | ||||
| 2354 | port = drm_dp_get_port(mstb, port_msg->port_number); | |||
| 2355 | if (!port) { | |||
| 2356 | port = drm_dp_mst_add_port(dev, mgr, mstb, | |||
| 2357 | port_msg->port_number); | |||
| 2358 | if (!port) | |||
| 2359 | return -ENOMEM12; | |||
| 2360 | created = true1; | |||
| 2361 | changed = true1; | |||
| 2362 | } else if (!port->input && port_msg->input_port && port->connector) { | |||
| 2363 | /* Since port->connector can't be changed here, we create a | |||
| 2364 | * new port if input_port changes from 0 to 1 | |||
| 2365 | */ | |||
| 2366 | drm_dp_mst_topology_unlink_port(mgr, port); | |||
| 2367 | drm_dp_mst_topology_put_port(port); | |||
| 2368 | port = drm_dp_mst_add_port(dev, mgr, mstb, | |||
| 2369 | port_msg->port_number); | |||
| 2370 | if (!port) | |||
| 2371 | return -ENOMEM12; | |||
| 2372 | changed = true1; | |||
| 2373 | created = true1; | |||
| 2374 | } else if (port->input && !port_msg->input_port) { | |||
| 2375 | changed = true1; | |||
| 2376 | } else if (port->connector) { | |||
| 2377 | /* We're updating a port that's exposed to userspace, so do it | |||
| 2378 | * under lock | |||
| 2379 | */ | |||
| 2380 | drm_modeset_lock(&mgr->base.lock, NULL((void *)0)); | |||
| 2381 | ||||
| 2382 | old_ddps = port->ddps; | |||
| 2383 | changed = port->ddps != port_msg->ddps || | |||
| 2384 | (port->ddps && | |||
| 2385 | (port->ldps != port_msg->legacy_device_plug_status || | |||
| 2386 | port->dpcd_rev != port_msg->dpcd_revision || | |||
| 2387 | port->mcs != port_msg->mcs || | |||
| 2388 | port->pdt != port_msg->peer_device_type || | |||
| 2389 | port->num_sdp_stream_sinks != | |||
| 2390 | port_msg->num_sdp_stream_sinks)); | |||
| 2391 | } | |||
| 2392 | ||||
| 2393 | port->input = port_msg->input_port; | |||
| 2394 | if (!port->input) | |||
| 2395 | new_pdt = port_msg->peer_device_type; | |||
| 2396 | new_mcs = port_msg->mcs; | |||
| 2397 | port->ddps = port_msg->ddps; | |||
| 2398 | port->ldps = port_msg->legacy_device_plug_status; | |||
| 2399 | port->dpcd_rev = port_msg->dpcd_revision; | |||
| 2400 | port->num_sdp_streams = port_msg->num_sdp_streams; | |||
| 2401 | port->num_sdp_stream_sinks = port_msg->num_sdp_stream_sinks; | |||
| 2402 | ||||
| 2403 | /* manage mstb port lists with mgr lock - take a reference | |||
| 2404 | for this list */ | |||
| 2405 | if (created) { | |||
| 2406 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2407 | drm_dp_mst_topology_get_port(port); | |||
| 2408 | list_add(&port->next, &mstb->ports); | |||
| 2409 | mstb->num_ports++; | |||
| 2410 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2411 | } | |||
| 2412 | ||||
| 2413 | /* | |||
| 2414 | * Reprobe PBN caps on both hotplug, and when re-probing the link | |||
| 2415 | * for our parent mstb | |||
| 2416 | */ | |||
| 2417 | if (old_ddps != port->ddps || !created) { | |||
| 2418 | if (port->ddps && !port->input) { | |||
| 2419 | ret = drm_dp_send_enum_path_resources(mgr, mstb, | |||
| 2420 | port); | |||
| 2421 | if (ret == 1) | |||
| 2422 | changed = true1; | |||
| 2423 | } else { | |||
| 2424 | port->full_pbn = 0; | |||
| 2425 | } | |||
| 2426 | } | |||
| 2427 | ||||
| 2428 | ret = drm_dp_port_set_pdt(port, new_pdt, new_mcs); | |||
| 2429 | if (ret == 1) { | |||
| 2430 | send_link_addr = true1; | |||
| 2431 | } else if (ret < 0) { | |||
| 2432 | drm_err(dev, "Failed to change PDT on port %p: %d\n", port, ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to change PDT on port %p: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port, ret ); | |||
| 2433 | goto fail; | |||
| 2434 | } | |||
| 2435 | ||||
| 2436 | /* | |||
| 2437 | * If this port wasn't just created, then we're reprobing because | |||
| 2438 | * we're coming out of suspend. In this case, always resend the link | |||
| 2439 | * address if there's an MSTB on this port | |||
| 2440 | */ | |||
| 2441 | if (!created && port->pdt == DP_PEER_DEVICE_MST_BRANCHING0x2 && | |||
| 2442 | port->mcs) | |||
| 2443 | send_link_addr = true1; | |||
| 2444 | ||||
| 2445 | if (port->connector) | |||
| 2446 | drm_modeset_unlock(&mgr->base.lock); | |||
| 2447 | else if (!port->input) | |||
| 2448 | drm_dp_mst_port_add_connector(mstb, port); | |||
| 2449 | ||||
| 2450 | if (send_link_addr && port->mstb) { | |||
| 2451 | ret = drm_dp_send_link_address(mgr, port->mstb); | |||
| 2452 | if (ret == 1) /* MSTB below us changed */ | |||
| 2453 | changed = true1; | |||
| 2454 | else if (ret < 0) | |||
| 2455 | goto fail_put; | |||
| 2456 | } | |||
| 2457 | ||||
| 2458 | /* put reference to this port */ | |||
| 2459 | drm_dp_mst_topology_put_port(port); | |||
| 2460 | return changed; | |||
| 2461 | ||||
| 2462 | fail: | |||
| 2463 | drm_dp_mst_topology_unlink_port(mgr, port); | |||
| 2464 | if (port->connector) | |||
| 2465 | drm_modeset_unlock(&mgr->base.lock); | |||
| 2466 | fail_put: | |||
| 2467 | drm_dp_mst_topology_put_port(port); | |||
| 2468 | return ret; | |||
| 2469 | } | |||
| 2470 | ||||
| 2471 | static int | |||
| 2472 | drm_dp_mst_handle_conn_stat(struct drm_dp_mst_branch *mstb, | |||
| 2473 | struct drm_dp_connection_status_notify *conn_stat) | |||
| 2474 | { | |||
| 2475 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; | |||
| 2476 | struct drm_dp_mst_port *port; | |||
| 2477 | int old_ddps, ret; | |||
| 2478 | u8 new_pdt; | |||
| 2479 | bool_Bool new_mcs; | |||
| 2480 | bool_Bool dowork = false0, create_connector = false0; | |||
| 2481 | ||||
| 2482 | port = drm_dp_get_port(mstb, conn_stat->port_number); | |||
| 2483 | if (!port) | |||
| 2484 | return 0; | |||
| 2485 | ||||
| 2486 | if (port->connector) { | |||
| 2487 | if (!port->input && conn_stat->input_port) { | |||
| 2488 | /* | |||
| 2489 | * We can't remove a connector from an already exposed | |||
| 2490 | * port, so just throw the port out and make sure we | |||
| 2491 | * reprobe the link address of it's parent MSTB | |||
| 2492 | */ | |||
| 2493 | drm_dp_mst_topology_unlink_port(mgr, port); | |||
| 2494 | mstb->link_address_sent = false0; | |||
| 2495 | dowork = true1; | |||
| 2496 | goto out; | |||
| 2497 | } | |||
| 2498 | ||||
| 2499 | /* Locking is only needed if the port's exposed to userspace */ | |||
| 2500 | drm_modeset_lock(&mgr->base.lock, NULL((void *)0)); | |||
| 2501 | } else if (port->input && !conn_stat->input_port) { | |||
| 2502 | create_connector = true1; | |||
| 2503 | /* Reprobe link address so we get num_sdp_streams */ | |||
| 2504 | mstb->link_address_sent = false0; | |||
| 2505 | dowork = true1; | |||
| 2506 | } | |||
| 2507 | ||||
| 2508 | old_ddps = port->ddps; | |||
| 2509 | port->input = conn_stat->input_port; | |||
| 2510 | port->ldps = conn_stat->legacy_device_plug_status; | |||
| 2511 | port->ddps = conn_stat->displayport_device_plug_status; | |||
| 2512 | ||||
| 2513 | if (old_ddps != port->ddps) { | |||
| 2514 | if (port->ddps && !port->input) | |||
| 2515 | drm_dp_send_enum_path_resources(mgr, mstb, port); | |||
| 2516 | else | |||
| 2517 | port->full_pbn = 0; | |||
| 2518 | } | |||
| 2519 | ||||
| 2520 | new_pdt = port->input ? DP_PEER_DEVICE_NONE0x0 : conn_stat->peer_device_type; | |||
| 2521 | new_mcs = conn_stat->message_capability_status; | |||
| 2522 | ret = drm_dp_port_set_pdt(port, new_pdt, new_mcs); | |||
| 2523 | if (ret == 1) { | |||
| 2524 | dowork = true1; | |||
| 2525 | } else if (ret < 0) { | |||
| 2526 | drm_err(mgr->dev, "Failed to change PDT for port %p: %d\n", port, ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to change PDT for port %p: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port, ret ); | |||
| 2527 | dowork = false0; | |||
| 2528 | } | |||
| 2529 | ||||
| 2530 | if (port->connector) | |||
| 2531 | drm_modeset_unlock(&mgr->base.lock); | |||
| 2532 | else if (create_connector) | |||
| 2533 | drm_dp_mst_port_add_connector(mstb, port); | |||
| 2534 | ||||
| 2535 | out: | |||
| 2536 | drm_dp_mst_topology_put_port(port); | |||
| 2537 | return dowork; | |||
| 2538 | } | |||
| 2539 | ||||
| 2540 | static struct drm_dp_mst_branch *drm_dp_get_mst_branch_device(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2541 | u8 lct, u8 *rad) | |||
| 2542 | { | |||
| 2543 | struct drm_dp_mst_branch *mstb; | |||
| 2544 | struct drm_dp_mst_port *port; | |||
| 2545 | int i, ret; | |||
| 2546 | /* find the port by iterating down */ | |||
| 2547 | ||||
| 2548 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2549 | mstb = mgr->mst_primary; | |||
| 2550 | ||||
| 2551 | if (!mstb) | |||
| 2552 | goto out; | |||
| 2553 | ||||
| 2554 | for (i = 0; i < lct - 1; i++) { | |||
| 2555 | int shift = (i % 2) ? 0 : 4; | |||
| 2556 | int port_num = (rad[i / 2] >> shift) & 0xf; | |||
| ||||
| 2557 | ||||
| 2558 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 2559 | if (port->port_num == port_num) { | |||
| 2560 | mstb = port->mstb; | |||
| 2561 | if (!mstb) { | |||
| 2562 | drm_err(mgr->dev,printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "failed to lookup MSTB with lct %d, rad %02x\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , lct, rad [0]) | |||
| 2563 | "failed to lookup MSTB with lct %d, rad %02x\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "failed to lookup MSTB with lct %d, rad %02x\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , lct, rad [0]) | |||
| 2564 | lct, rad[0])printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "failed to lookup MSTB with lct %d, rad %02x\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , lct, rad [0]); | |||
| 2565 | goto out; | |||
| 2566 | } | |||
| 2567 | ||||
| 2568 | break; | |||
| 2569 | } | |||
| 2570 | } | |||
| 2571 | } | |||
| 2572 | ret = drm_dp_mst_topology_try_get_mstb(mstb); | |||
| 2573 | if (!ret) | |||
| 2574 | mstb = NULL((void *)0); | |||
| 2575 | out: | |||
| 2576 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2577 | return mstb; | |||
| 2578 | } | |||
| 2579 | ||||
| 2580 | static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper( | |||
| 2581 | struct drm_dp_mst_branch *mstb, | |||
| 2582 | const uint8_t *guid) | |||
| 2583 | { | |||
| 2584 | struct drm_dp_mst_branch *found_mstb; | |||
| 2585 | struct drm_dp_mst_port *port; | |||
| 2586 | ||||
| 2587 | if (!mstb) | |||
| 2588 | return NULL((void *)0); | |||
| 2589 | ||||
| 2590 | if (memcmp(mstb->guid, guid, 16)__builtin_memcmp((mstb->guid), (guid), (16)) == 0) | |||
| 2591 | return mstb; | |||
| 2592 | ||||
| 2593 | ||||
| 2594 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 2595 | found_mstb = get_mst_branch_device_by_guid_helper(port->mstb, guid); | |||
| 2596 | ||||
| 2597 | if (found_mstb) | |||
| 2598 | return found_mstb; | |||
| 2599 | } | |||
| 2600 | ||||
| 2601 | return NULL((void *)0); | |||
| 2602 | } | |||
| 2603 | ||||
| 2604 | static struct drm_dp_mst_branch * | |||
| 2605 | drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2606 | const uint8_t *guid) | |||
| 2607 | { | |||
| 2608 | struct drm_dp_mst_branch *mstb; | |||
| 2609 | int ret; | |||
| 2610 | ||||
| 2611 | /* find the port by iterating down */ | |||
| 2612 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2613 | ||||
| 2614 | mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid); | |||
| 2615 | if (mstb) { | |||
| 2616 | ret = drm_dp_mst_topology_try_get_mstb(mstb); | |||
| 2617 | if (!ret) | |||
| 2618 | mstb = NULL((void *)0); | |||
| 2619 | } | |||
| 2620 | ||||
| 2621 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2622 | return mstb; | |||
| 2623 | } | |||
| 2624 | ||||
| 2625 | static int drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2626 | struct drm_dp_mst_branch *mstb) | |||
| 2627 | { | |||
| 2628 | struct drm_dp_mst_port *port; | |||
| 2629 | int ret; | |||
| 2630 | bool_Bool changed = false0; | |||
| 2631 | ||||
| 2632 | if (!mstb->link_address_sent) { | |||
| 2633 | ret = drm_dp_send_link_address(mgr, mstb); | |||
| 2634 | if (ret == 1) | |||
| 2635 | changed = true1; | |||
| 2636 | else if (ret < 0) | |||
| 2637 | return ret; | |||
| 2638 | } | |||
| 2639 | ||||
| 2640 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 2641 | if (port->input || !port->ddps || !port->mstb) | |||
| 2642 | continue; | |||
| 2643 | ||||
| 2644 | ret = drm_dp_check_and_send_link_address(mgr, port->mstb); | |||
| 2645 | if (ret == 1) | |||
| 2646 | changed = true1; | |||
| 2647 | else if (ret < 0) | |||
| 2648 | return ret; | |||
| 2649 | } | |||
| 2650 | ||||
| 2651 | return changed; | |||
| 2652 | } | |||
| 2653 | ||||
| 2654 | static void drm_dp_mst_link_probe_work(struct work_struct *work) | |||
| 2655 | { | |||
| 2656 | struct drm_dp_mst_topology_mgr *mgr = | |||
| 2657 | container_of(work, struct drm_dp_mst_topology_mgr, work)({ const __typeof( ((struct drm_dp_mst_topology_mgr *)0)-> work ) *__mptr = (work); (struct drm_dp_mst_topology_mgr *)( ( char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_mgr , work) );}); | |||
| 2658 | struct drm_device *dev = mgr->dev; | |||
| 2659 | struct drm_dp_mst_branch *mstb; | |||
| 2660 | int ret; | |||
| 2661 | bool_Bool clear_payload_id_table; | |||
| 2662 | ||||
| 2663 | mutex_lock(&mgr->probe_lock)rw_enter_write(&mgr->probe_lock); | |||
| 2664 | ||||
| 2665 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2666 | clear_payload_id_table = !mgr->payload_id_table_cleared; | |||
| 2667 | mgr->payload_id_table_cleared = true1; | |||
| 2668 | ||||
| 2669 | mstb = mgr->mst_primary; | |||
| 2670 | if (mstb) { | |||
| 2671 | ret = drm_dp_mst_topology_try_get_mstb(mstb); | |||
| 2672 | if (!ret) | |||
| 2673 | mstb = NULL((void *)0); | |||
| 2674 | } | |||
| 2675 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2676 | if (!mstb) { | |||
| 2677 | mutex_unlock(&mgr->probe_lock)rw_exit_write(&mgr->probe_lock); | |||
| 2678 | return; | |||
| 2679 | } | |||
| 2680 | ||||
| 2681 | /* | |||
| 2682 | * Certain branch devices seem to incorrectly report an available_pbn | |||
| 2683 | * of 0 on downstream sinks, even after clearing the | |||
| 2684 | * DP_PAYLOAD_ALLOCATE_* registers in | |||
| 2685 | * drm_dp_mst_topology_mgr_set_mst(). Namely, the CableMatters USB-C | |||
| 2686 | * 2x DP hub. Sending a CLEAR_PAYLOAD_ID_TABLE message seems to make | |||
| 2687 | * things work again. | |||
| 2688 | */ | |||
| 2689 | if (clear_payload_id_table) { | |||
| 2690 | drm_dbg_kms(dev, "Clearing payload ID table\n")__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "Clearing payload ID table\n"); | |||
| 2691 | drm_dp_send_clear_payload_id_table(mgr, mstb); | |||
| 2692 | } | |||
| 2693 | ||||
| 2694 | ret = drm_dp_check_and_send_link_address(mgr, mstb); | |||
| 2695 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 2696 | ||||
| 2697 | mutex_unlock(&mgr->probe_lock)rw_exit_write(&mgr->probe_lock); | |||
| 2698 | if (ret > 0) | |||
| 2699 | drm_kms_helper_hotplug_event(dev); | |||
| 2700 | } | |||
| 2701 | ||||
| 2702 | static bool_Bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2703 | u8 *guid) | |||
| 2704 | { | |||
| 2705 | u64 salt; | |||
| 2706 | ||||
| 2707 | if (memchr_inv(guid, 0, 16)) | |||
| 2708 | return true1; | |||
| 2709 | ||||
| 2710 | salt = get_jiffies_64(); | |||
| 2711 | ||||
| 2712 | memcpy(&guid[0], &salt, sizeof(u64))__builtin_memcpy((&guid[0]), (&salt), (sizeof(u64))); | |||
| 2713 | memcpy(&guid[8], &salt, sizeof(u64))__builtin_memcpy((&guid[8]), (&salt), (sizeof(u64))); | |||
| 2714 | ||||
| 2715 | return false0; | |||
| 2716 | } | |||
| 2717 | ||||
| 2718 | static void build_dpcd_read(struct drm_dp_sideband_msg_tx *msg, | |||
| 2719 | u8 port_num, u32 offset, u8 num_bytes) | |||
| 2720 | { | |||
| 2721 | struct drm_dp_sideband_msg_req_body req; | |||
| 2722 | ||||
| 2723 | req.req_type = DP_REMOTE_DPCD_READ0x20; | |||
| 2724 | req.u.dpcd_read.port_number = port_num; | |||
| 2725 | req.u.dpcd_read.dpcd_address = offset; | |||
| 2726 | req.u.dpcd_read.num_bytes = num_bytes; | |||
| 2727 | drm_dp_encode_sideband_req(&req, msg); | |||
| 2728 | } | |||
| 2729 | ||||
| 2730 | static int drm_dp_send_sideband_msg(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2731 | bool_Bool up, u8 *msg, int len) | |||
| 2732 | { | |||
| 2733 | int ret; | |||
| 2734 | int regbase = up ? DP_SIDEBAND_MSG_UP_REP_BASE0x1200 : DP_SIDEBAND_MSG_DOWN_REQ_BASE0x1000; | |||
| 2735 | int tosend, total, offset; | |||
| 2736 | int retries = 0; | |||
| 2737 | ||||
| 2738 | retry: | |||
| 2739 | total = len; | |||
| 2740 | offset = 0; | |||
| 2741 | do { | |||
| 2742 | tosend = min3(mgr->max_dpcd_transaction_bytes, 16, total)(((mgr->max_dpcd_transaction_bytes)<((((16)<(total)) ?(16):(total))))?(mgr->max_dpcd_transaction_bytes):((((16) <(total))?(16):(total)))); | |||
| 2743 | ||||
| 2744 | ret = drm_dp_dpcd_write(mgr->aux, regbase + offset, | |||
| 2745 | &msg[offset], | |||
| 2746 | tosend); | |||
| 2747 | if (ret != tosend) { | |||
| 2748 | if (ret == -EIO5 && retries < 5) { | |||
| 2749 | retries++; | |||
| 2750 | goto retry; | |||
| 2751 | } | |||
| 2752 | drm_dbg_kms(mgr->dev, "failed to dpcd write %d %d\n", tosend, ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to dpcd write %d %d\n" , tosend, ret); | |||
| 2753 | ||||
| 2754 | return -EIO5; | |||
| 2755 | } | |||
| 2756 | offset += tosend; | |||
| 2757 | total -= tosend; | |||
| 2758 | } while (total > 0); | |||
| 2759 | return 0; | |||
| 2760 | } | |||
| 2761 | ||||
| 2762 | static int set_hdr_from_dst_qlock(struct drm_dp_sideband_msg_hdr *hdr, | |||
| 2763 | struct drm_dp_sideband_msg_tx *txmsg) | |||
| 2764 | { | |||
| 2765 | struct drm_dp_mst_branch *mstb = txmsg->dst; | |||
| 2766 | u8 req_type; | |||
| 2767 | ||||
| 2768 | req_type = txmsg->msg[0] & 0x7f; | |||
| 2769 | if (req_type == DP_CONNECTION_STATUS_NOTIFY0x02 || | |||
| 2770 | req_type == DP_RESOURCE_STATUS_NOTIFY0x13 || | |||
| 2771 | req_type == DP_CLEAR_PAYLOAD_ID_TABLE0x14) | |||
| 2772 | hdr->broadcast = 1; | |||
| 2773 | else | |||
| 2774 | hdr->broadcast = 0; | |||
| 2775 | hdr->path_msg = txmsg->path_msg; | |||
| 2776 | if (hdr->broadcast) { | |||
| 2777 | hdr->lct = 1; | |||
| 2778 | hdr->lcr = 6; | |||
| 2779 | } else { | |||
| 2780 | hdr->lct = mstb->lct; | |||
| 2781 | hdr->lcr = mstb->lct - 1; | |||
| 2782 | } | |||
| 2783 | ||||
| 2784 | memcpy(hdr->rad, mstb->rad, hdr->lct / 2)__builtin_memcpy((hdr->rad), (mstb->rad), (hdr->lct / 2)); | |||
| 2785 | ||||
| 2786 | return 0; | |||
| 2787 | } | |||
| 2788 | /* | |||
| 2789 | * process a single block of the next message in the sideband queue | |||
| 2790 | */ | |||
| 2791 | static int process_single_tx_qlock(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2792 | struct drm_dp_sideband_msg_tx *txmsg, | |||
| 2793 | bool_Bool up) | |||
| 2794 | { | |||
| 2795 | u8 chunk[48]; | |||
| 2796 | struct drm_dp_sideband_msg_hdr hdr; | |||
| 2797 | int len, space, idx, tosend; | |||
| 2798 | int ret; | |||
| 2799 | ||||
| 2800 | if (txmsg->state == DRM_DP_SIDEBAND_TX_SENT2) | |||
| 2801 | return 0; | |||
| 2802 | ||||
| 2803 | memset(&hdr, 0, sizeof(struct drm_dp_sideband_msg_hdr))__builtin_memset((&hdr), (0), (sizeof(struct drm_dp_sideband_msg_hdr ))); | |||
| 2804 | ||||
| 2805 | if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED0) | |||
| 2806 | txmsg->state = DRM_DP_SIDEBAND_TX_START_SEND1; | |||
| 2807 | ||||
| 2808 | /* make hdr from dst mst */ | |||
| 2809 | ret = set_hdr_from_dst_qlock(&hdr, txmsg); | |||
| 2810 | if (ret < 0) | |||
| 2811 | return ret; | |||
| 2812 | ||||
| 2813 | /* amount left to send in this message */ | |||
| 2814 | len = txmsg->cur_len - txmsg->cur_offset; | |||
| 2815 | ||||
| 2816 | /* 48 - sideband msg size - 1 byte for data CRC, x header bytes */ | |||
| 2817 | space = 48 - 1 - drm_dp_calc_sb_hdr_size(&hdr); | |||
| 2818 | ||||
| 2819 | tosend = min(len, space)(((len)<(space))?(len):(space)); | |||
| 2820 | if (len == txmsg->cur_len) | |||
| 2821 | hdr.somt = 1; | |||
| 2822 | if (space >= len) | |||
| 2823 | hdr.eomt = 1; | |||
| 2824 | ||||
| 2825 | ||||
| 2826 | hdr.msg_len = tosend + 1; | |||
| 2827 | drm_dp_encode_sideband_msg_hdr(&hdr, chunk, &idx); | |||
| 2828 | memcpy(&chunk[idx], &txmsg->msg[txmsg->cur_offset], tosend)__builtin_memcpy((&chunk[idx]), (&txmsg->msg[txmsg ->cur_offset]), (tosend)); | |||
| 2829 | /* add crc at end */ | |||
| 2830 | drm_dp_crc_sideband_chunk_req(&chunk[idx], tosend); | |||
| 2831 | idx += tosend + 1; | |||
| 2832 | ||||
| 2833 | ret = drm_dp_send_sideband_msg(mgr, up, chunk, idx); | |||
| 2834 | if (ret) { | |||
| 2835 | if (drm_debug_enabled(DRM_UT_DP)drm_debug_enabled_raw(DRM_UT_DP)) { | |||
| 2836 | struct drm_printer p = drm_debug_printer(DBG_PREFIX"[dp_mst]"); | |||
| 2837 | ||||
| 2838 | drm_printf(&p, "sideband msg failed to send\n"); | |||
| 2839 | drm_dp_mst_dump_sideband_msg_tx(&p, txmsg); | |||
| 2840 | } | |||
| 2841 | return ret; | |||
| 2842 | } | |||
| 2843 | ||||
| 2844 | txmsg->cur_offset += tosend; | |||
| 2845 | if (txmsg->cur_offset == txmsg->cur_len) { | |||
| 2846 | txmsg->state = DRM_DP_SIDEBAND_TX_SENT2; | |||
| 2847 | return 1; | |||
| 2848 | } | |||
| 2849 | return 0; | |||
| 2850 | } | |||
| 2851 | ||||
| 2852 | static void process_single_down_tx_qlock(struct drm_dp_mst_topology_mgr *mgr) | |||
| 2853 | { | |||
| 2854 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 2855 | int ret; | |||
| 2856 | ||||
| 2857 | WARN_ON(!mutex_is_locked(&mgr->qlock))({ int __ret = !!(!(rw_status(&mgr->qlock) != 0)); if ( __ret) printf("WARNING %s failed at %s:%d\n", "!(rw_status(&mgr->qlock) != 0)" , "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c", 2857 ); __builtin_expect(!!(__ret), 0); }); | |||
| 2858 | ||||
| 2859 | /* construct a chunk from the first msg in the tx_msg queue */ | |||
| 2860 | if (list_empty(&mgr->tx_msg_downq)) | |||
| 2861 | return; | |||
| 2862 | ||||
| 2863 | txmsg = list_first_entry(&mgr->tx_msg_downq,({ const __typeof( ((struct drm_dp_sideband_msg_tx *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (struct drm_dp_sideband_msg_tx *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_sideband_msg_tx , next) );}) | |||
| 2864 | struct drm_dp_sideband_msg_tx, next)({ const __typeof( ((struct drm_dp_sideband_msg_tx *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (struct drm_dp_sideband_msg_tx *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_sideband_msg_tx , next) );}); | |||
| 2865 | ret = process_single_tx_qlock(mgr, txmsg, false0); | |||
| 2866 | if (ret < 0) { | |||
| 2867 | drm_dbg_kms(mgr->dev, "failed to send msg in q %d\n", ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to send msg in q %d\n" , ret); | |||
| 2868 | list_del(&txmsg->next); | |||
| 2869 | txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT4; | |||
| 2870 | wake_up_all(&mgr->tx_waitq)wake_up(&mgr->tx_waitq); | |||
| 2871 | } | |||
| 2872 | } | |||
| 2873 | ||||
| 2874 | static void drm_dp_queue_down_tx(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2875 | struct drm_dp_sideband_msg_tx *txmsg) | |||
| 2876 | { | |||
| 2877 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 2878 | list_add_tail(&txmsg->next, &mgr->tx_msg_downq); | |||
| 2879 | ||||
| 2880 | if (drm_debug_enabled(DRM_UT_DP)drm_debug_enabled_raw(DRM_UT_DP)) { | |||
| 2881 | struct drm_printer p = drm_debug_printer(DBG_PREFIX"[dp_mst]"); | |||
| 2882 | ||||
| 2883 | drm_dp_mst_dump_sideband_msg_tx(&p, txmsg); | |||
| 2884 | } | |||
| 2885 | ||||
| 2886 | if (list_is_singular(&mgr->tx_msg_downq)) | |||
| 2887 | process_single_down_tx_qlock(mgr); | |||
| 2888 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 2889 | } | |||
| 2890 | ||||
| 2891 | static void | |||
| 2892 | drm_dp_dump_link_address(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 2893 | struct drm_dp_link_address_ack_reply *reply) | |||
| 2894 | { | |||
| 2895 | struct drm_dp_link_addr_reply_port *port_reply; | |||
| 2896 | int i; | |||
| 2897 | ||||
| 2898 | for (i = 0; i < reply->nports; i++) { | |||
| 2899 | port_reply = &reply->ports[i]; | |||
| 2900 | drm_dbg_kms(mgr->dev,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2901 | "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2902 | i,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2903 | port_reply->input_port,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2904 | port_reply->peer_device_type,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2905 | port_reply->port_number,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2906 | port_reply->dpcd_revision,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2907 | port_reply->mcs,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2908 | port_reply->ddps,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2909 | port_reply->legacy_device_plug_status,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2910 | port_reply->num_sdp_streams,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ) | |||
| 2911 | port_reply->num_sdp_stream_sinks)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d: input %d, pdt: %d, pn: %d, dpcd_rev: %02x, mcs: %d, ddps: %d, ldps %d, sdp %d/%d\n" , i, port_reply->input_port, port_reply->peer_device_type , port_reply->port_number, port_reply->dpcd_revision, port_reply ->mcs, port_reply->ddps, port_reply->legacy_device_plug_status , port_reply->num_sdp_streams, port_reply->num_sdp_stream_sinks ); | |||
| 2912 | } | |||
| 2913 | } | |||
| 2914 | ||||
| 2915 | static int drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2916 | struct drm_dp_mst_branch *mstb) | |||
| 2917 | { | |||
| 2918 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 2919 | struct drm_dp_link_address_ack_reply *reply; | |||
| 2920 | struct drm_dp_mst_port *port, *tmp; | |||
| 2921 | int i, ret, port_mask = 0; | |||
| 2922 | bool_Bool changed = false0; | |||
| 2923 | ||||
| 2924 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 2925 | if (!txmsg) | |||
| 2926 | return -ENOMEM12; | |||
| 2927 | ||||
| 2928 | txmsg->dst = mstb; | |||
| 2929 | build_link_address(txmsg); | |||
| 2930 | ||||
| 2931 | mstb->link_address_sent = true1; | |||
| 2932 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 2933 | ||||
| 2934 | /* FIXME: Actually do some real error handling here */ | |||
| 2935 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 2936 | if (ret <= 0) { | |||
| 2937 | drm_err(mgr->dev, "Sending link address failed with %d\n", ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Sending link address failed with %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , ret); | |||
| 2938 | goto out; | |||
| 2939 | } | |||
| 2940 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 2941 | drm_err(mgr->dev, "link address NAK received\n")printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "link address NAK received\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__); | |||
| 2942 | ret = -EIO5; | |||
| 2943 | goto out; | |||
| 2944 | } | |||
| 2945 | ||||
| 2946 | reply = &txmsg->reply.u.link_addr; | |||
| 2947 | drm_dbg_kms(mgr->dev, "link address reply: %d\n", reply->nports)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "link address reply: %d\n", reply ->nports); | |||
| 2948 | drm_dp_dump_link_address(mgr, reply); | |||
| 2949 | ||||
| 2950 | ret = drm_dp_check_mstb_guid(mstb, reply->guid); | |||
| 2951 | if (ret) { | |||
| 2952 | char buf[64]; | |||
| 2953 | ||||
| 2954 | drm_dp_mst_rad_to_str(mstb->rad, mstb->lct, buf, sizeof(buf)); | |||
| 2955 | drm_err(mgr->dev, "GUID check on %s failed: %d\n", buf, ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "GUID check on %s failed: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , buf, ret ); | |||
| 2956 | goto out; | |||
| 2957 | } | |||
| 2958 | ||||
| 2959 | for (i = 0; i < reply->nports; i++) { | |||
| 2960 | port_mask |= BIT(reply->ports[i].port_number)(1UL << (reply->ports[i].port_number)); | |||
| 2961 | ret = drm_dp_mst_handle_link_address_port(mstb, mgr->dev, | |||
| 2962 | &reply->ports[i]); | |||
| 2963 | if (ret == 1) | |||
| 2964 | changed = true1; | |||
| 2965 | else if (ret < 0) | |||
| 2966 | goto out; | |||
| 2967 | } | |||
| 2968 | ||||
| 2969 | /* Prune any ports that are currently a part of mstb in our in-memory | |||
| 2970 | * topology, but were not seen in this link address. Usually this | |||
| 2971 | * means that they were removed while the topology was out of sync, | |||
| 2972 | * e.g. during suspend/resume | |||
| 2973 | */ | |||
| 2974 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 2975 | list_for_each_entry_safe(port, tmp, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}), tmp = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next) );}); & port->next != (&mstb->ports); port = tmp, tmp = ({ const __typeof( ((__typeof(*tmp) *)0)->next ) *__mptr = (tmp-> next.next); (__typeof(*tmp) *)( (char *)__mptr - __builtin_offsetof (__typeof(*tmp), next) );})) { | |||
| 2976 | if (port_mask & BIT(port->port_num)(1UL << (port->port_num))) | |||
| 2977 | continue; | |||
| 2978 | ||||
| 2979 | drm_dbg_kms(mgr->dev, "port %d was not in link address, removing\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d was not in link address, removing\n" , port->port_num) | |||
| 2980 | port->port_num)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "port %d was not in link address, removing\n" , port->port_num); | |||
| 2981 | list_del(&port->next); | |||
| 2982 | drm_dp_mst_topology_put_port(port); | |||
| 2983 | changed = true1; | |||
| 2984 | } | |||
| 2985 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 2986 | ||||
| 2987 | out: | |||
| 2988 | if (ret <= 0) | |||
| 2989 | mstb->link_address_sent = false0; | |||
| 2990 | kfree(txmsg); | |||
| 2991 | return ret < 0 ? ret : changed; | |||
| 2992 | } | |||
| 2993 | ||||
| 2994 | static void | |||
| 2995 | drm_dp_send_clear_payload_id_table(struct drm_dp_mst_topology_mgr *mgr, | |||
| 2996 | struct drm_dp_mst_branch *mstb) | |||
| 2997 | { | |||
| 2998 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 2999 | int ret; | |||
| 3000 | ||||
| 3001 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3002 | if (!txmsg) | |||
| 3003 | return; | |||
| 3004 | ||||
| 3005 | txmsg->dst = mstb; | |||
| 3006 | build_clear_payload_id_table(txmsg); | |||
| 3007 | ||||
| 3008 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3009 | ||||
| 3010 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 3011 | if (ret > 0 && txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) | |||
| 3012 | drm_dbg_kms(mgr->dev, "clear payload table id nak received\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "clear payload table id nak received\n" ); | |||
| 3013 | ||||
| 3014 | kfree(txmsg); | |||
| 3015 | } | |||
| 3016 | ||||
| 3017 | static int | |||
| 3018 | drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3019 | struct drm_dp_mst_branch *mstb, | |||
| 3020 | struct drm_dp_mst_port *port) | |||
| 3021 | { | |||
| 3022 | struct drm_dp_enum_path_resources_ack_reply *path_res; | |||
| 3023 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3024 | int ret; | |||
| 3025 | ||||
| 3026 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3027 | if (!txmsg) | |||
| 3028 | return -ENOMEM12; | |||
| 3029 | ||||
| 3030 | txmsg->dst = mstb; | |||
| 3031 | build_enum_path_resources(txmsg, port->port_num); | |||
| 3032 | ||||
| 3033 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3034 | ||||
| 3035 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 3036 | if (ret > 0) { | |||
| 3037 | ret = 0; | |||
| 3038 | path_res = &txmsg->reply.u.path_resources; | |||
| 3039 | ||||
| 3040 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 3041 | drm_dbg_kms(mgr->dev, "enum path resources nak received\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "enum path resources nak received\n" ); | |||
| 3042 | } else { | |||
| 3043 | if (port->port_num != path_res->port_number) | |||
| 3044 | DRM_ERROR("got incorrect port in response\n")__drm_err("got incorrect port in response\n"); | |||
| 3045 | ||||
| 3046 | drm_dbg_kms(mgr->dev, "enum path resources %d: %d %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "enum path resources %d: %d %d\n" , path_res->port_number, path_res->full_payload_bw_number , path_res->avail_payload_bw_number) | |||
| 3047 | path_res->port_number,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "enum path resources %d: %d %d\n" , path_res->port_number, path_res->full_payload_bw_number , path_res->avail_payload_bw_number) | |||
| 3048 | path_res->full_payload_bw_number,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "enum path resources %d: %d %d\n" , path_res->port_number, path_res->full_payload_bw_number , path_res->avail_payload_bw_number) | |||
| 3049 | path_res->avail_payload_bw_number)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "enum path resources %d: %d %d\n" , path_res->port_number, path_res->full_payload_bw_number , path_res->avail_payload_bw_number); | |||
| 3050 | ||||
| 3051 | /* | |||
| 3052 | * If something changed, make sure we send a | |||
| 3053 | * hotplug | |||
| 3054 | */ | |||
| 3055 | if (port->full_pbn != path_res->full_payload_bw_number || | |||
| 3056 | port->fec_capable != path_res->fec_capable) | |||
| 3057 | ret = 1; | |||
| 3058 | ||||
| 3059 | port->full_pbn = path_res->full_payload_bw_number; | |||
| 3060 | port->fec_capable = path_res->fec_capable; | |||
| 3061 | } | |||
| 3062 | } | |||
| 3063 | ||||
| 3064 | kfree(txmsg); | |||
| 3065 | return ret; | |||
| 3066 | } | |||
| 3067 | ||||
| 3068 | static struct drm_dp_mst_port *drm_dp_get_last_connected_port_to_mstb(struct drm_dp_mst_branch *mstb) | |||
| 3069 | { | |||
| 3070 | if (!mstb->port_parent) | |||
| 3071 | return NULL((void *)0); | |||
| 3072 | ||||
| 3073 | if (mstb->port_parent->mstb != mstb) | |||
| 3074 | return mstb->port_parent; | |||
| 3075 | ||||
| 3076 | return drm_dp_get_last_connected_port_to_mstb(mstb->port_parent->parent); | |||
| 3077 | } | |||
| 3078 | ||||
| 3079 | /* | |||
| 3080 | * Searches upwards in the topology starting from mstb to try to find the | |||
| 3081 | * closest available parent of mstb that's still connected to the rest of the | |||
| 3082 | * topology. This can be used in order to perform operations like releasing | |||
| 3083 | * payloads, where the branch device which owned the payload may no longer be | |||
| 3084 | * around and thus would require that the payload on the last living relative | |||
| 3085 | * be freed instead. | |||
| 3086 | */ | |||
| 3087 | static struct drm_dp_mst_branch * | |||
| 3088 | drm_dp_get_last_connected_port_and_mstb(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3089 | struct drm_dp_mst_branch *mstb, | |||
| 3090 | int *port_num) | |||
| 3091 | { | |||
| 3092 | struct drm_dp_mst_branch *rmstb = NULL((void *)0); | |||
| 3093 | struct drm_dp_mst_port *found_port; | |||
| 3094 | ||||
| 3095 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 3096 | if (!mgr->mst_primary) | |||
| 3097 | goto out; | |||
| 3098 | ||||
| 3099 | do { | |||
| 3100 | found_port = drm_dp_get_last_connected_port_to_mstb(mstb); | |||
| 3101 | if (!found_port) | |||
| 3102 | break; | |||
| 3103 | ||||
| 3104 | if (drm_dp_mst_topology_try_get_mstb(found_port->parent)) { | |||
| 3105 | rmstb = found_port->parent; | |||
| 3106 | *port_num = found_port->port_num; | |||
| 3107 | } else { | |||
| 3108 | /* Search again, starting from this parent */ | |||
| 3109 | mstb = found_port->parent; | |||
| 3110 | } | |||
| 3111 | } while (!rmstb); | |||
| 3112 | out: | |||
| 3113 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3114 | return rmstb; | |||
| 3115 | } | |||
| 3116 | ||||
| 3117 | static int drm_dp_payload_send_msg(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3118 | struct drm_dp_mst_port *port, | |||
| 3119 | int id, | |||
| 3120 | int pbn) | |||
| 3121 | { | |||
| 3122 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3123 | struct drm_dp_mst_branch *mstb; | |||
| 3124 | int ret, port_num; | |||
| 3125 | u8 sinks[DRM_DP_MAX_SDP_STREAMS16]; | |||
| 3126 | int i; | |||
| 3127 | ||||
| 3128 | port_num = port->port_num; | |||
| 3129 | mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent); | |||
| 3130 | if (!mstb) { | |||
| 3131 | mstb = drm_dp_get_last_connected_port_and_mstb(mgr, | |||
| 3132 | port->parent, | |||
| 3133 | &port_num); | |||
| 3134 | ||||
| 3135 | if (!mstb) | |||
| 3136 | return -EINVAL22; | |||
| 3137 | } | |||
| 3138 | ||||
| 3139 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3140 | if (!txmsg) { | |||
| 3141 | ret = -ENOMEM12; | |||
| 3142 | goto fail_put; | |||
| 3143 | } | |||
| 3144 | ||||
| 3145 | for (i = 0; i < port->num_sdp_streams; i++) | |||
| 3146 | sinks[i] = i; | |||
| 3147 | ||||
| 3148 | txmsg->dst = mstb; | |||
| 3149 | build_allocate_payload(txmsg, port_num, | |||
| 3150 | id, | |||
| 3151 | pbn, port->num_sdp_streams, sinks); | |||
| 3152 | ||||
| 3153 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3154 | ||||
| 3155 | /* | |||
| 3156 | * FIXME: there is a small chance that between getting the last | |||
| 3157 | * connected mstb and sending the payload message, the last connected | |||
| 3158 | * mstb could also be removed from the topology. In the future, this | |||
| 3159 | * needs to be fixed by restarting the | |||
| 3160 | * drm_dp_get_last_connected_port_and_mstb() search in the event of a | |||
| 3161 | * timeout if the topology is still connected to the system. | |||
| 3162 | */ | |||
| 3163 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 3164 | if (ret > 0) { | |||
| 3165 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) | |||
| 3166 | ret = -EINVAL22; | |||
| 3167 | else | |||
| 3168 | ret = 0; | |||
| 3169 | } | |||
| 3170 | kfree(txmsg); | |||
| 3171 | fail_put: | |||
| 3172 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3173 | return ret; | |||
| 3174 | } | |||
| 3175 | ||||
| 3176 | int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3177 | struct drm_dp_mst_port *port, bool_Bool power_up) | |||
| 3178 | { | |||
| 3179 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3180 | int ret; | |||
| 3181 | ||||
| 3182 | port = drm_dp_mst_topology_get_port_validated(mgr, port); | |||
| 3183 | if (!port) | |||
| 3184 | return -EINVAL22; | |||
| 3185 | ||||
| 3186 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3187 | if (!txmsg) { | |||
| 3188 | drm_dp_mst_topology_put_port(port); | |||
| 3189 | return -ENOMEM12; | |||
| 3190 | } | |||
| 3191 | ||||
| 3192 | txmsg->dst = port->parent; | |||
| 3193 | build_power_updown_phy(txmsg, port->port_num, power_up); | |||
| 3194 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3195 | ||||
| 3196 | ret = drm_dp_mst_wait_tx_reply(port->parent, txmsg); | |||
| 3197 | if (ret > 0) { | |||
| 3198 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) | |||
| 3199 | ret = -EINVAL22; | |||
| 3200 | else | |||
| 3201 | ret = 0; | |||
| 3202 | } | |||
| 3203 | kfree(txmsg); | |||
| 3204 | drm_dp_mst_topology_put_port(port); | |||
| 3205 | ||||
| 3206 | return ret; | |||
| 3207 | } | |||
| 3208 | EXPORT_SYMBOL(drm_dp_send_power_updown_phy); | |||
| 3209 | ||||
| 3210 | int drm_dp_send_query_stream_enc_status(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3211 | struct drm_dp_mst_port *port, | |||
| 3212 | struct drm_dp_query_stream_enc_status_ack_reply *status) | |||
| 3213 | { | |||
| 3214 | struct drm_dp_mst_topology_state *state; | |||
| 3215 | struct drm_dp_mst_atomic_payload *payload; | |||
| 3216 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3217 | u8 nonce[7]; | |||
| 3218 | int ret; | |||
| 3219 | ||||
| 3220 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3221 | if (!txmsg) | |||
| 3222 | return -ENOMEM12; | |||
| 3223 | ||||
| 3224 | port = drm_dp_mst_topology_get_port_validated(mgr, port); | |||
| 3225 | if (!port) { | |||
| 3226 | ret = -EINVAL22; | |||
| 3227 | goto out_get_port; | |||
| 3228 | } | |||
| 3229 | ||||
| 3230 | get_random_bytes(nonce, sizeof(nonce)); | |||
| 3231 | ||||
| 3232 | drm_modeset_lock(&mgr->base.lock, NULL((void *)0)); | |||
| 3233 | state = to_drm_dp_mst_topology_state(mgr->base.state); | |||
| 3234 | payload = drm_atomic_get_mst_payload_state(state, port); | |||
| 3235 | ||||
| 3236 | /* | |||
| 3237 | * "Source device targets the QUERY_STREAM_ENCRYPTION_STATUS message | |||
| 3238 | * transaction at the MST Branch device directly connected to the | |||
| 3239 | * Source" | |||
| 3240 | */ | |||
| 3241 | txmsg->dst = mgr->mst_primary; | |||
| 3242 | ||||
| 3243 | build_query_stream_enc_status(txmsg, payload->vcpi, nonce); | |||
| 3244 | ||||
| 3245 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3246 | ||||
| 3247 | ret = drm_dp_mst_wait_tx_reply(mgr->mst_primary, txmsg); | |||
| 3248 | if (ret < 0) { | |||
| 3249 | goto out; | |||
| 3250 | } else if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 3251 | drm_dbg_kms(mgr->dev, "query encryption status nak received\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "query encryption status nak received\n" ); | |||
| 3252 | ret = -ENXIO6; | |||
| 3253 | goto out; | |||
| 3254 | } | |||
| 3255 | ||||
| 3256 | ret = 0; | |||
| 3257 | memcpy(status, &txmsg->reply.u.enc_status, sizeof(*status))__builtin_memcpy((status), (&txmsg->reply.u.enc_status ), (sizeof(*status))); | |||
| 3258 | ||||
| 3259 | out: | |||
| 3260 | drm_modeset_unlock(&mgr->base.lock); | |||
| 3261 | drm_dp_mst_topology_put_port(port); | |||
| 3262 | out_get_port: | |||
| 3263 | kfree(txmsg); | |||
| 3264 | return ret; | |||
| 3265 | } | |||
| 3266 | EXPORT_SYMBOL(drm_dp_send_query_stream_enc_status); | |||
| 3267 | ||||
| 3268 | static int drm_dp_create_payload_step1(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3269 | struct drm_dp_mst_atomic_payload *payload) | |||
| 3270 | { | |||
| 3271 | return drm_dp_dpcd_write_payload(mgr, payload->vcpi, payload->vc_start_slot, | |||
| 3272 | payload->time_slots); | |||
| 3273 | } | |||
| 3274 | ||||
| 3275 | static int drm_dp_create_payload_step2(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3276 | struct drm_dp_mst_atomic_payload *payload) | |||
| 3277 | { | |||
| 3278 | int ret; | |||
| 3279 | struct drm_dp_mst_port *port = drm_dp_mst_topology_get_port_validated(mgr, payload->port); | |||
| 3280 | ||||
| 3281 | if (!port) | |||
| 3282 | return -EIO5; | |||
| 3283 | ||||
| 3284 | ret = drm_dp_payload_send_msg(mgr, port, payload->vcpi, payload->pbn); | |||
| 3285 | drm_dp_mst_topology_put_port(port); | |||
| 3286 | return ret; | |||
| 3287 | } | |||
| 3288 | ||||
| 3289 | static int drm_dp_destroy_payload_step1(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3290 | struct drm_dp_mst_topology_state *mst_state, | |||
| 3291 | struct drm_dp_mst_atomic_payload *payload) | |||
| 3292 | { | |||
| 3293 | drm_dbg_kms(mgr->dev, "\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "\n"); | |||
| 3294 | ||||
| 3295 | /* it's okay for these to fail */ | |||
| 3296 | drm_dp_payload_send_msg(mgr, payload->port, payload->vcpi, 0); | |||
| 3297 | drm_dp_dpcd_write_payload(mgr, payload->vcpi, payload->vc_start_slot, 0); | |||
| 3298 | ||||
| 3299 | return 0; | |||
| 3300 | } | |||
| 3301 | ||||
| 3302 | /** | |||
| 3303 | * drm_dp_add_payload_part1() - Execute payload update part 1 | |||
| 3304 | * @mgr: Manager to use. | |||
| 3305 | * @mst_state: The MST atomic state | |||
| 3306 | * @payload: The payload to write | |||
| 3307 | * | |||
| 3308 | * Determines the starting time slot for the given payload, and programs the VCPI for this payload | |||
| 3309 | * into hardware. After calling this, the driver should generate ACT and payload packets. | |||
| 3310 | * | |||
| 3311 | * Returns: 0 on success, error code on failure. In the event that this fails, | |||
| 3312 | * @payload.vc_start_slot will also be set to -1. | |||
| 3313 | */ | |||
| 3314 | int drm_dp_add_payload_part1(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3315 | struct drm_dp_mst_topology_state *mst_state, | |||
| 3316 | struct drm_dp_mst_atomic_payload *payload) | |||
| 3317 | { | |||
| 3318 | struct drm_dp_mst_port *port; | |||
| 3319 | int ret; | |||
| 3320 | ||||
| 3321 | port = drm_dp_mst_topology_get_port_validated(mgr, payload->port); | |||
| 3322 | if (!port) { | |||
| 3323 | drm_dbg_kms(mgr->dev,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "VCPI %d for port %p not in topology, not creating a payload\n" , payload->vcpi, payload->port) | |||
| 3324 | "VCPI %d for port %p not in topology, not creating a payload\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "VCPI %d for port %p not in topology, not creating a payload\n" , payload->vcpi, payload->port) | |||
| 3325 | payload->vcpi, payload->port)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "VCPI %d for port %p not in topology, not creating a payload\n" , payload->vcpi, payload->port); | |||
| 3326 | payload->vc_start_slot = -1; | |||
| 3327 | return 0; | |||
| 3328 | } | |||
| 3329 | ||||
| 3330 | if (mgr->payload_count == 0) | |||
| 3331 | mgr->next_start_slot = mst_state->start_slot; | |||
| 3332 | ||||
| 3333 | payload->vc_start_slot = mgr->next_start_slot; | |||
| 3334 | ||||
| 3335 | ret = drm_dp_create_payload_step1(mgr, payload); | |||
| 3336 | drm_dp_mst_topology_put_port(port); | |||
| 3337 | if (ret < 0) { | |||
| 3338 | drm_warn(mgr->dev, "Failed to create MST payload for port %p: %d\n",printf("drm:pid%d:%s *WARNING* " "[drm] " "Failed to create MST payload for port %p: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , payload ->port, ret) | |||
| 3339 | payload->port, ret)printf("drm:pid%d:%s *WARNING* " "[drm] " "Failed to create MST payload for port %p: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , payload ->port, ret); | |||
| 3340 | payload->vc_start_slot = -1; | |||
| 3341 | return ret; | |||
| 3342 | } | |||
| 3343 | ||||
| 3344 | mgr->payload_count++; | |||
| 3345 | mgr->next_start_slot += payload->time_slots; | |||
| 3346 | ||||
| 3347 | return 0; | |||
| 3348 | } | |||
| 3349 | EXPORT_SYMBOL(drm_dp_add_payload_part1); | |||
| 3350 | ||||
| 3351 | /** | |||
| 3352 | * drm_dp_remove_payload() - Remove an MST payload | |||
| 3353 | * @mgr: Manager to use. | |||
| 3354 | * @mst_state: The MST atomic state | |||
| 3355 | * @old_payload: The payload with its old state | |||
| 3356 | * @new_payload: The payload to write | |||
| 3357 | * | |||
| 3358 | * Removes a payload from an MST topology if it was successfully assigned a start slot. Also updates | |||
| 3359 | * the starting time slots of all other payloads which would have been shifted towards the start of | |||
| 3360 | * the VC table as a result. After calling this, the driver should generate ACT and payload packets. | |||
| 3361 | */ | |||
| 3362 | void drm_dp_remove_payload(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3363 | struct drm_dp_mst_topology_state *mst_state, | |||
| 3364 | const struct drm_dp_mst_atomic_payload *old_payload, | |||
| 3365 | struct drm_dp_mst_atomic_payload *new_payload) | |||
| 3366 | { | |||
| 3367 | struct drm_dp_mst_atomic_payload *pos; | |||
| 3368 | bool_Bool send_remove = false0; | |||
| 3369 | ||||
| 3370 | /* We failed to make the payload, so nothing to do */ | |||
| 3371 | if (new_payload->vc_start_slot == -1) | |||
| 3372 | return; | |||
| 3373 | ||||
| 3374 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 3375 | send_remove = drm_dp_mst_port_downstream_of_branch(new_payload->port, mgr->mst_primary); | |||
| 3376 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3377 | ||||
| 3378 | if (send_remove) | |||
| 3379 | drm_dp_destroy_payload_step1(mgr, mst_state, new_payload); | |||
| 3380 | else | |||
| 3381 | drm_dbg_kms(mgr->dev, "Payload for VCPI %d not in topology, not sending remove\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Payload for VCPI %d not in topology, not sending remove\n" , new_payload->vcpi) | |||
| 3382 | new_payload->vcpi)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Payload for VCPI %d not in topology, not sending remove\n" , new_payload->vcpi); | |||
| 3383 | ||||
| 3384 | list_for_each_entry(pos, &mst_state->payloads, next)for (pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) *__mptr = ((&mst_state->payloads)->next); (__typeof (*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos) , next) );}); &pos->next != (&mst_state->payloads ); pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) * __mptr = (pos->next.next); (__typeof(*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos), next) );})) { | |||
| 3385 | if (pos != new_payload && pos->vc_start_slot > new_payload->vc_start_slot) | |||
| 3386 | pos->vc_start_slot -= old_payload->time_slots; | |||
| 3387 | } | |||
| 3388 | new_payload->vc_start_slot = -1; | |||
| 3389 | ||||
| 3390 | mgr->payload_count--; | |||
| 3391 | mgr->next_start_slot -= old_payload->time_slots; | |||
| 3392 | ||||
| 3393 | if (new_payload->delete) | |||
| 3394 | drm_dp_mst_put_port_malloc(new_payload->port); | |||
| 3395 | } | |||
| 3396 | EXPORT_SYMBOL(drm_dp_remove_payload); | |||
| 3397 | ||||
| 3398 | /** | |||
| 3399 | * drm_dp_add_payload_part2() - Execute payload update part 2 | |||
| 3400 | * @mgr: Manager to use. | |||
| 3401 | * @state: The global atomic state | |||
| 3402 | * @payload: The payload to update | |||
| 3403 | * | |||
| 3404 | * If @payload was successfully assigned a starting time slot by drm_dp_add_payload_part1(), this | |||
| 3405 | * function will send the sideband messages to finish allocating this payload. | |||
| 3406 | * | |||
| 3407 | * Returns: 0 on success, negative error code on failure. | |||
| 3408 | */ | |||
| 3409 | int drm_dp_add_payload_part2(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3410 | struct drm_atomic_state *state, | |||
| 3411 | struct drm_dp_mst_atomic_payload *payload) | |||
| 3412 | { | |||
| 3413 | int ret = 0; | |||
| 3414 | ||||
| 3415 | /* Skip failed payloads */ | |||
| 3416 | if (payload->vc_start_slot == -1) { | |||
| 3417 | drm_dbg_kms(mgr->dev, "Part 1 of payload creation for %s failed, skipping part 2\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Part 1 of payload creation for %s failed, skipping part 2\n" , payload->port->connector->name) | |||
| 3418 | payload->port->connector->name)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Part 1 of payload creation for %s failed, skipping part 2\n" , payload->port->connector->name); | |||
| 3419 | return -EIO5; | |||
| 3420 | } | |||
| 3421 | ||||
| 3422 | ret = drm_dp_create_payload_step2(mgr, payload); | |||
| 3423 | if (ret < 0) { | |||
| 3424 | if (!payload->delete) | |||
| 3425 | drm_err(mgr->dev, "Step 2 of creating MST payload for %p failed: %d\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Step 2 of creating MST payload for %p failed: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , payload ->port, ret) | |||
| 3426 | payload->port, ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Step 2 of creating MST payload for %p failed: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , payload ->port, ret); | |||
| 3427 | else | |||
| 3428 | drm_dbg_kms(mgr->dev, "Step 2 of removing MST payload for %p failed: %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Step 2 of removing MST payload for %p failed: %d\n" , payload->port, ret) | |||
| 3429 | payload->port, ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Step 2 of removing MST payload for %p failed: %d\n" , payload->port, ret); | |||
| 3430 | } | |||
| 3431 | ||||
| 3432 | return ret; | |||
| 3433 | } | |||
| 3434 | EXPORT_SYMBOL(drm_dp_add_payload_part2); | |||
| 3435 | ||||
| 3436 | static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3437 | struct drm_dp_mst_port *port, | |||
| 3438 | int offset, int size, u8 *bytes) | |||
| 3439 | { | |||
| 3440 | int ret = 0; | |||
| 3441 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3442 | struct drm_dp_mst_branch *mstb; | |||
| 3443 | ||||
| 3444 | mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent); | |||
| 3445 | if (!mstb) | |||
| 3446 | return -EINVAL22; | |||
| 3447 | ||||
| 3448 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3449 | if (!txmsg) { | |||
| 3450 | ret = -ENOMEM12; | |||
| 3451 | goto fail_put; | |||
| 3452 | } | |||
| 3453 | ||||
| 3454 | build_dpcd_read(txmsg, port->port_num, offset, size); | |||
| 3455 | txmsg->dst = port->parent; | |||
| 3456 | ||||
| 3457 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3458 | ||||
| 3459 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 3460 | if (ret < 0) | |||
| 3461 | goto fail_free; | |||
| 3462 | ||||
| 3463 | if (txmsg->reply.reply_type == 1) { | |||
| 3464 | drm_dbg_kms(mgr->dev, "mstb %p port %d: DPCD read on addr 0x%x for %d bytes NAKed\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "mstb %p port %d: DPCD read on addr 0x%x for %d bytes NAKed\n" , mstb, port->port_num, offset, size) | |||
| 3465 | mstb, port->port_num, offset, size)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "mstb %p port %d: DPCD read on addr 0x%x for %d bytes NAKed\n" , mstb, port->port_num, offset, size); | |||
| 3466 | ret = -EIO5; | |||
| 3467 | goto fail_free; | |||
| 3468 | } | |||
| 3469 | ||||
| 3470 | if (txmsg->reply.u.remote_dpcd_read_ack.num_bytes != size) { | |||
| 3471 | ret = -EPROTO95; | |||
| 3472 | goto fail_free; | |||
| 3473 | } | |||
| 3474 | ||||
| 3475 | ret = min_t(size_t, txmsg->reply.u.remote_dpcd_read_ack.num_bytes,({ size_t __min_a = (txmsg->reply.u.remote_dpcd_read_ack.num_bytes ); size_t __min_b = (size); __min_a < __min_b ? __min_a : __min_b ; }) | |||
| 3476 | size)({ size_t __min_a = (txmsg->reply.u.remote_dpcd_read_ack.num_bytes ); size_t __min_b = (size); __min_a < __min_b ? __min_a : __min_b ; }); | |||
| 3477 | memcpy(bytes, txmsg->reply.u.remote_dpcd_read_ack.bytes, ret)__builtin_memcpy((bytes), (txmsg->reply.u.remote_dpcd_read_ack .bytes), (ret)); | |||
| 3478 | ||||
| 3479 | fail_free: | |||
| 3480 | kfree(txmsg); | |||
| 3481 | fail_put: | |||
| 3482 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3483 | ||||
| 3484 | return ret; | |||
| 3485 | } | |||
| 3486 | ||||
| 3487 | static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3488 | struct drm_dp_mst_port *port, | |||
| 3489 | int offset, int size, u8 *bytes) | |||
| 3490 | { | |||
| 3491 | int ret; | |||
| 3492 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3493 | struct drm_dp_mst_branch *mstb; | |||
| 3494 | ||||
| 3495 | mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent); | |||
| 3496 | if (!mstb) | |||
| 3497 | return -EINVAL22; | |||
| 3498 | ||||
| 3499 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3500 | if (!txmsg) { | |||
| 3501 | ret = -ENOMEM12; | |||
| 3502 | goto fail_put; | |||
| 3503 | } | |||
| 3504 | ||||
| 3505 | build_dpcd_write(txmsg, port->port_num, offset, size, bytes); | |||
| 3506 | txmsg->dst = mstb; | |||
| 3507 | ||||
| 3508 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 3509 | ||||
| 3510 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 3511 | if (ret > 0) { | |||
| 3512 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) | |||
| 3513 | ret = -EIO5; | |||
| 3514 | else | |||
| 3515 | ret = size; | |||
| 3516 | } | |||
| 3517 | ||||
| 3518 | kfree(txmsg); | |||
| 3519 | fail_put: | |||
| 3520 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3521 | return ret; | |||
| 3522 | } | |||
| 3523 | ||||
| 3524 | static int drm_dp_encode_up_ack_reply(struct drm_dp_sideband_msg_tx *msg, u8 req_type) | |||
| 3525 | { | |||
| 3526 | struct drm_dp_sideband_msg_reply_body reply; | |||
| 3527 | ||||
| 3528 | reply.reply_type = DP_SIDEBAND_REPLY_ACK0x00; | |||
| 3529 | reply.req_type = req_type; | |||
| 3530 | drm_dp_encode_sideband_reply(&reply, msg); | |||
| 3531 | return 0; | |||
| 3532 | } | |||
| 3533 | ||||
| 3534 | static int drm_dp_send_up_ack_reply(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3535 | struct drm_dp_mst_branch *mstb, | |||
| 3536 | int req_type, bool_Bool broadcast) | |||
| 3537 | { | |||
| 3538 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3539 | ||||
| 3540 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 3541 | if (!txmsg) | |||
| 3542 | return -ENOMEM12; | |||
| 3543 | ||||
| 3544 | txmsg->dst = mstb; | |||
| 3545 | drm_dp_encode_up_ack_reply(txmsg, req_type); | |||
| 3546 | ||||
| 3547 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 3548 | /* construct a chunk from the first msg in the tx_msg queue */ | |||
| 3549 | process_single_tx_qlock(mgr, txmsg, true1); | |||
| 3550 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 3551 | ||||
| 3552 | kfree(txmsg); | |||
| 3553 | return 0; | |||
| 3554 | } | |||
| 3555 | ||||
| 3556 | /** | |||
| 3557 | * drm_dp_get_vc_payload_bw - get the VC payload BW for an MST link | |||
| 3558 | * @mgr: The &drm_dp_mst_topology_mgr to use | |||
| 3559 | * @link_rate: link rate in 10kbits/s units | |||
| 3560 | * @link_lane_count: lane count | |||
| 3561 | * | |||
| 3562 | * Calculate the total bandwidth of a MultiStream Transport link. The returned | |||
| 3563 | * value is in units of PBNs/(timeslots/1 MTP). This value can be used to | |||
| 3564 | * convert the number of PBNs required for a given stream to the number of | |||
| 3565 | * timeslots this stream requires in each MTP. | |||
| 3566 | */ | |||
| 3567 | int drm_dp_get_vc_payload_bw(const struct drm_dp_mst_topology_mgr *mgr, | |||
| 3568 | int link_rate, int link_lane_count) | |||
| 3569 | { | |||
| 3570 | if (link_rate == 0 || link_lane_count == 0) | |||
| 3571 | drm_dbg_kms(mgr->dev, "invalid link rate/lane count: (%d / %d)\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "invalid link rate/lane count: (%d / %d)\n" , link_rate, link_lane_count) | |||
| 3572 | link_rate, link_lane_count)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "invalid link rate/lane count: (%d / %d)\n" , link_rate, link_lane_count); | |||
| 3573 | ||||
| 3574 | /* See DP v2.0 2.6.4.2, VCPayload_Bandwidth_for_OneTimeSlotPer_MTP_Allocation */ | |||
| 3575 | return link_rate * link_lane_count / 54000; | |||
| 3576 | } | |||
| 3577 | EXPORT_SYMBOL(drm_dp_get_vc_payload_bw); | |||
| 3578 | ||||
| 3579 | /** | |||
| 3580 | * drm_dp_read_mst_cap() - check whether or not a sink supports MST | |||
| 3581 | * @aux: The DP AUX channel to use | |||
| 3582 | * @dpcd: A cached copy of the DPCD capabilities for this sink | |||
| 3583 | * | |||
| 3584 | * Returns: %True if the sink supports MST, %false otherwise | |||
| 3585 | */ | |||
| 3586 | bool_Bool drm_dp_read_mst_cap(struct drm_dp_aux *aux, | |||
| 3587 | const u8 dpcd[DP_RECEIVER_CAP_SIZE0xf]) | |||
| 3588 | { | |||
| 3589 | u8 mstm_cap; | |||
| 3590 | ||||
| 3591 | if (dpcd[DP_DPCD_REV0x000] < DP_DPCD_REV_120x12) | |||
| 3592 | return false0; | |||
| 3593 | ||||
| 3594 | if (drm_dp_dpcd_readb(aux, DP_MSTM_CAP0x021, &mstm_cap) != 1) | |||
| 3595 | return false0; | |||
| 3596 | ||||
| 3597 | return mstm_cap & DP_MST_CAP(1 << 0); | |||
| 3598 | } | |||
| 3599 | EXPORT_SYMBOL(drm_dp_read_mst_cap); | |||
| 3600 | ||||
| 3601 | /** | |||
| 3602 | * drm_dp_mst_topology_mgr_set_mst() - Set the MST state for a topology manager | |||
| 3603 | * @mgr: manager to set state for | |||
| 3604 | * @mst_state: true to enable MST on this connector - false to disable. | |||
| 3605 | * | |||
| 3606 | * This is called by the driver when it detects an MST capable device plugged | |||
| 3607 | * into a DP MST capable port, or when a DP MST capable device is unplugged. | |||
| 3608 | */ | |||
| 3609 | int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool_Bool mst_state) | |||
| 3610 | { | |||
| 3611 | int ret = 0; | |||
| 3612 | struct drm_dp_mst_branch *mstb = NULL((void *)0); | |||
| 3613 | ||||
| 3614 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 3615 | if (mst_state == mgr->mst_state) | |||
| 3616 | goto out_unlock; | |||
| 3617 | ||||
| 3618 | mgr->mst_state = mst_state; | |||
| 3619 | /* set the device into MST mode */ | |||
| 3620 | if (mst_state) { | |||
| 3621 | WARN_ON(mgr->mst_primary)({ int __ret = !!(mgr->mst_primary); if (__ret) printf("WARNING %s failed at %s:%d\n" , "mgr->mst_primary", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 3621); __builtin_expect(!!(__ret), 0); }); | |||
| 3622 | ||||
| 3623 | /* get dpcd info */ | |||
| 3624 | ret = drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd); | |||
| 3625 | if (ret < 0) { | |||
| 3626 | drm_dbg_kms(mgr->dev, "%s: failed to read DPCD, ret %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "%s: failed to read DPCD, ret %d\n" , mgr->aux->name, ret) | |||
| 3627 | mgr->aux->name, ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "%s: failed to read DPCD, ret %d\n" , mgr->aux->name, ret); | |||
| 3628 | goto out_unlock; | |||
| 3629 | } | |||
| 3630 | ||||
| 3631 | /* add initial branch device at LCT 1 */ | |||
| 3632 | mstb = drm_dp_add_mst_branch_device(1, NULL((void *)0)); | |||
| 3633 | if (mstb == NULL((void *)0)) { | |||
| 3634 | ret = -ENOMEM12; | |||
| 3635 | goto out_unlock; | |||
| 3636 | } | |||
| 3637 | mstb->mgr = mgr; | |||
| 3638 | ||||
| 3639 | /* give this the main reference */ | |||
| 3640 | mgr->mst_primary = mstb; | |||
| 3641 | drm_dp_mst_topology_get_mstb(mgr->mst_primary); | |||
| 3642 | ||||
| 3643 | ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL0x111, | |||
| 3644 | DP_MST_EN(1 << 0) | | |||
| 3645 | DP_UP_REQ_EN(1 << 1) | | |||
| 3646 | DP_UPSTREAM_IS_SRC(1 << 2)); | |||
| 3647 | if (ret < 0) | |||
| 3648 | goto out_unlock; | |||
| 3649 | ||||
| 3650 | /* Write reset payload */ | |||
| 3651 | drm_dp_dpcd_write_payload(mgr, 0, 0, 0x3f); | |||
| 3652 | ||||
| 3653 | queue_work(system_long_wq, &mgr->work); | |||
| 3654 | ||||
| 3655 | ret = 0; | |||
| 3656 | } else { | |||
| 3657 | /* disable MST on the device */ | |||
| 3658 | mstb = mgr->mst_primary; | |||
| 3659 | mgr->mst_primary = NULL((void *)0); | |||
| 3660 | /* this can fail if the device is gone */ | |||
| 3661 | drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL0x111, 0); | |||
| 3662 | ret = 0; | |||
| 3663 | mgr->payload_id_table_cleared = false0; | |||
| 3664 | ||||
| 3665 | memset(&mgr->down_rep_recv, 0, sizeof(mgr->down_rep_recv))__builtin_memset((&mgr->down_rep_recv), (0), (sizeof(mgr ->down_rep_recv))); | |||
| 3666 | memset(&mgr->up_req_recv, 0, sizeof(mgr->up_req_recv))__builtin_memset((&mgr->up_req_recv), (0), (sizeof(mgr ->up_req_recv))); | |||
| 3667 | } | |||
| 3668 | ||||
| 3669 | out_unlock: | |||
| 3670 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3671 | if (mstb) | |||
| 3672 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3673 | return ret; | |||
| 3674 | ||||
| 3675 | } | |||
| 3676 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_set_mst); | |||
| 3677 | ||||
| 3678 | static void | |||
| 3679 | drm_dp_mst_topology_mgr_invalidate_mstb(struct drm_dp_mst_branch *mstb) | |||
| 3680 | { | |||
| 3681 | struct drm_dp_mst_port *port; | |||
| 3682 | ||||
| 3683 | /* The link address will need to be re-sent on resume */ | |||
| 3684 | mstb->link_address_sent = false0; | |||
| 3685 | ||||
| 3686 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) | |||
| 3687 | if (port->mstb) | |||
| 3688 | drm_dp_mst_topology_mgr_invalidate_mstb(port->mstb); | |||
| 3689 | } | |||
| 3690 | ||||
| 3691 | /** | |||
| 3692 | * drm_dp_mst_topology_mgr_suspend() - suspend the MST manager | |||
| 3693 | * @mgr: manager to suspend | |||
| 3694 | * | |||
| 3695 | * This function tells the MST device that we can't handle UP messages | |||
| 3696 | * anymore. This should stop it from sending any since we are suspended. | |||
| 3697 | */ | |||
| 3698 | void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr) | |||
| 3699 | { | |||
| 3700 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 3701 | drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL0x111, | |||
| 3702 | DP_MST_EN(1 << 0) | DP_UPSTREAM_IS_SRC(1 << 2)); | |||
| 3703 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3704 | flush_work(&mgr->up_req_work); | |||
| 3705 | flush_work(&mgr->work); | |||
| 3706 | flush_work(&mgr->delayed_destroy_work); | |||
| 3707 | ||||
| 3708 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 3709 | if (mgr->mst_state && mgr->mst_primary) | |||
| 3710 | drm_dp_mst_topology_mgr_invalidate_mstb(mgr->mst_primary); | |||
| 3711 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3712 | } | |||
| 3713 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_suspend); | |||
| 3714 | ||||
| 3715 | /** | |||
| 3716 | * drm_dp_mst_topology_mgr_resume() - resume the MST manager | |||
| 3717 | * @mgr: manager to resume | |||
| 3718 | * @sync: whether or not to perform topology reprobing synchronously | |||
| 3719 | * | |||
| 3720 | * This will fetch DPCD and see if the device is still there, | |||
| 3721 | * if it is, it will rewrite the MSTM control bits, and return. | |||
| 3722 | * | |||
| 3723 | * If the device fails this returns -1, and the driver should do | |||
| 3724 | * a full MST reprobe, in case we were undocked. | |||
| 3725 | * | |||
| 3726 | * During system resume (where it is assumed that the driver will be calling | |||
| 3727 | * drm_atomic_helper_resume()) this function should be called beforehand with | |||
| 3728 | * @sync set to true. In contexts like runtime resume where the driver is not | |||
| 3729 | * expected to be calling drm_atomic_helper_resume(), this function should be | |||
| 3730 | * called with @sync set to false in order to avoid deadlocking. | |||
| 3731 | * | |||
| 3732 | * Returns: -1 if the MST topology was removed while we were suspended, 0 | |||
| 3733 | * otherwise. | |||
| 3734 | */ | |||
| 3735 | int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3736 | bool_Bool sync) | |||
| 3737 | { | |||
| 3738 | int ret; | |||
| 3739 | u8 guid[16]; | |||
| 3740 | ||||
| 3741 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 3742 | if (!mgr->mst_primary) | |||
| 3743 | goto out_fail; | |||
| 3744 | ||||
| 3745 | if (drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd) < 0) { | |||
| 3746 | drm_dbg_kms(mgr->dev, "dpcd read failed - undocked during suspend?\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "dpcd read failed - undocked during suspend?\n" ); | |||
| 3747 | goto out_fail; | |||
| 3748 | } | |||
| 3749 | ||||
| 3750 | ret = drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL0x111, | |||
| 3751 | DP_MST_EN(1 << 0) | | |||
| 3752 | DP_UP_REQ_EN(1 << 1) | | |||
| 3753 | DP_UPSTREAM_IS_SRC(1 << 2)); | |||
| 3754 | if (ret < 0) { | |||
| 3755 | drm_dbg_kms(mgr->dev, "mst write failed - undocked during suspend?\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "mst write failed - undocked during suspend?\n" ); | |||
| 3756 | goto out_fail; | |||
| 3757 | } | |||
| 3758 | ||||
| 3759 | /* Some hubs forget their guids after they resume */ | |||
| 3760 | ret = drm_dp_dpcd_read(mgr->aux, DP_GUID0x030, guid, 16); | |||
| 3761 | if (ret != 16) { | |||
| 3762 | drm_dbg_kms(mgr->dev, "dpcd read failed - undocked during suspend?\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "dpcd read failed - undocked during suspend?\n" ); | |||
| 3763 | goto out_fail; | |||
| 3764 | } | |||
| 3765 | ||||
| 3766 | ret = drm_dp_check_mstb_guid(mgr->mst_primary, guid); | |||
| 3767 | if (ret) { | |||
| 3768 | drm_dbg_kms(mgr->dev, "check mstb failed - undocked during suspend?\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "check mstb failed - undocked during suspend?\n" ); | |||
| 3769 | goto out_fail; | |||
| 3770 | } | |||
| 3771 | ||||
| 3772 | /* | |||
| 3773 | * For the final step of resuming the topology, we need to bring the | |||
| 3774 | * state of our in-memory topology back into sync with reality. So, | |||
| 3775 | * restart the probing process as if we're probing a new hub | |||
| 3776 | */ | |||
| 3777 | queue_work(system_long_wq, &mgr->work); | |||
| 3778 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3779 | ||||
| 3780 | if (sync) { | |||
| 3781 | drm_dbg_kms(mgr->dev,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Waiting for link probe work to finish re-syncing topology...\n" ) | |||
| 3782 | "Waiting for link probe work to finish re-syncing topology...\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Waiting for link probe work to finish re-syncing topology...\n" ); | |||
| 3783 | flush_work(&mgr->work); | |||
| 3784 | } | |||
| 3785 | ||||
| 3786 | return 0; | |||
| 3787 | ||||
| 3788 | out_fail: | |||
| 3789 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 3790 | return -1; | |||
| 3791 | } | |||
| 3792 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_resume); | |||
| 3793 | ||||
| 3794 | static bool_Bool | |||
| 3795 | drm_dp_get_one_sb_msg(struct drm_dp_mst_topology_mgr *mgr, bool_Bool up, | |||
| 3796 | struct drm_dp_mst_branch **mstb) | |||
| 3797 | { | |||
| 3798 | int len; | |||
| 3799 | u8 replyblock[32]; | |||
| 3800 | int replylen, curreply; | |||
| 3801 | int ret; | |||
| 3802 | u8 hdrlen; | |||
| 3803 | struct drm_dp_sideband_msg_hdr hdr; | |||
| 3804 | struct drm_dp_sideband_msg_rx *msg = | |||
| 3805 | up
| |||
| 3806 | int basereg = up
| |||
| 3807 | DP_SIDEBAND_MSG_DOWN_REP_BASE0x1400; | |||
| 3808 | ||||
| 3809 | if (!up
| |||
| 3810 | *mstb = NULL((void *)0); | |||
| 3811 | ||||
| 3812 | len = min(mgr->max_dpcd_transaction_bytes, 16)(((mgr->max_dpcd_transaction_bytes)<(16))?(mgr->max_dpcd_transaction_bytes ):(16)); | |||
| 3813 | ret = drm_dp_dpcd_read(mgr->aux, basereg, replyblock, len); | |||
| 3814 | if (ret != len) { | |||
| 3815 | drm_dbg_kms(mgr->dev, "failed to read DPCD down rep %d %d\n", len, ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to read DPCD down rep %d %d\n" , len, ret); | |||
| 3816 | return false0; | |||
| 3817 | } | |||
| 3818 | ||||
| 3819 | ret = drm_dp_decode_sideband_msg_hdr(mgr, &hdr, replyblock, len, &hdrlen); | |||
| 3820 | if (ret
| |||
| 3821 | print_hex_dump(KERN_DEBUG"\0017", "failed hdr", DUMP_PREFIX_NONE, 16, | |||
| 3822 | 1, replyblock, len, false0); | |||
| 3823 | drm_dbg_kms(mgr->dev, "ERROR: failed header\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "ERROR: failed header\n"); | |||
| 3824 | return false0; | |||
| 3825 | } | |||
| 3826 | ||||
| 3827 | if (!up
| |||
| 3828 | /* Caller is responsible for giving back this reference */ | |||
| 3829 | *mstb = drm_dp_get_mst_branch_device(mgr, hdr.lct, hdr.rad); | |||
| 3830 | if (!*mstb) { | |||
| 3831 | drm_dbg_kms(mgr->dev, "Got MST reply from unknown device %d\n", hdr.lct)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got MST reply from unknown device %d\n" , hdr.lct); | |||
| 3832 | return false0; | |||
| 3833 | } | |||
| 3834 | } | |||
| 3835 | ||||
| 3836 | if (!drm_dp_sideband_msg_set_header(msg, &hdr, hdrlen)) { | |||
| 3837 | drm_dbg_kms(mgr->dev, "sideband msg set header failed %d\n", replyblock[0])__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "sideband msg set header failed %d\n" , replyblock[0]); | |||
| 3838 | return false0; | |||
| 3839 | } | |||
| 3840 | ||||
| 3841 | replylen = min(msg->curchunk_len, (u8)(len - hdrlen))(((msg->curchunk_len)<((u8)(len - hdrlen)))?(msg->curchunk_len ):((u8)(len - hdrlen))); | |||
| 3842 | ret = drm_dp_sideband_append_payload(msg, replyblock + hdrlen, replylen); | |||
| 3843 | if (!ret) { | |||
| 3844 | drm_dbg_kms(mgr->dev, "sideband msg build failed %d\n", replyblock[0])__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "sideband msg build failed %d\n" , replyblock[0]); | |||
| 3845 | return false0; | |||
| 3846 | } | |||
| 3847 | ||||
| 3848 | replylen = msg->curchunk_len + msg->curchunk_hdrlen - len; | |||
| 3849 | curreply = len; | |||
| 3850 | while (replylen > 0) { | |||
| 3851 | len = min3(replylen, mgr->max_dpcd_transaction_bytes, 16)(((replylen)<((((mgr->max_dpcd_transaction_bytes)<(16 ))?(mgr->max_dpcd_transaction_bytes):(16))))?(replylen):(( ((mgr->max_dpcd_transaction_bytes)<(16))?(mgr->max_dpcd_transaction_bytes ):(16)))); | |||
| 3852 | ret = drm_dp_dpcd_read(mgr->aux, basereg + curreply, | |||
| 3853 | replyblock, len); | |||
| 3854 | if (ret != len) { | |||
| 3855 | drm_dbg_kms(mgr->dev, "failed to read a chunk (len %d, ret %d)\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to read a chunk (len %d, ret %d)\n" , len, ret) | |||
| 3856 | len, ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to read a chunk (len %d, ret %d)\n" , len, ret); | |||
| 3857 | return false0; | |||
| 3858 | } | |||
| 3859 | ||||
| 3860 | ret = drm_dp_sideband_append_payload(msg, replyblock, len); | |||
| 3861 | if (!ret) { | |||
| 3862 | drm_dbg_kms(mgr->dev, "failed to build sideband msg\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to build sideband msg\n" ); | |||
| 3863 | return false0; | |||
| 3864 | } | |||
| 3865 | ||||
| 3866 | curreply += len; | |||
| 3867 | replylen -= len; | |||
| 3868 | } | |||
| 3869 | return true1; | |||
| 3870 | } | |||
| 3871 | ||||
| 3872 | static int drm_dp_mst_handle_down_rep(struct drm_dp_mst_topology_mgr *mgr) | |||
| 3873 | { | |||
| 3874 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 3875 | struct drm_dp_mst_branch *mstb = NULL((void *)0); | |||
| 3876 | struct drm_dp_sideband_msg_rx *msg = &mgr->down_rep_recv; | |||
| 3877 | ||||
| 3878 | if (!drm_dp_get_one_sb_msg(mgr, false0, &mstb)) | |||
| 3879 | goto out_clear_reply; | |||
| 3880 | ||||
| 3881 | /* Multi-packet message transmission, don't clear the reply */ | |||
| 3882 | if (!msg->have_eomt) | |||
| 3883 | goto out; | |||
| 3884 | ||||
| 3885 | /* find the message */ | |||
| 3886 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 3887 | txmsg = list_first_entry_or_null(&mgr->tx_msg_downq,(list_empty(&mgr->tx_msg_downq) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_sideband_msg_tx *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (struct drm_dp_sideband_msg_tx *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_sideband_msg_tx , next) );})) | |||
| 3888 | struct drm_dp_sideband_msg_tx, next)(list_empty(&mgr->tx_msg_downq) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_sideband_msg_tx *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (struct drm_dp_sideband_msg_tx *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_sideband_msg_tx , next) );})); | |||
| 3889 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 3890 | ||||
| 3891 | /* Were we actually expecting a response, and from this mstb? */ | |||
| 3892 | if (!txmsg || txmsg->dst != mstb) { | |||
| 3893 | struct drm_dp_sideband_msg_hdr *hdr; | |||
| 3894 | ||||
| 3895 | hdr = &msg->initial_hdr; | |||
| 3896 | drm_dbg_kms(mgr->dev, "Got MST reply with no msg %p %d %d %02x %02x\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got MST reply with no msg %p %d %d %02x %02x\n" , mstb, hdr->seqno, hdr->lct, hdr->rad[0], msg->msg [0]) | |||
| 3897 | mstb, hdr->seqno, hdr->lct, hdr->rad[0], msg->msg[0])__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got MST reply with no msg %p %d %d %02x %02x\n" , mstb, hdr->seqno, hdr->lct, hdr->rad[0], msg->msg [0]); | |||
| 3898 | goto out_clear_reply; | |||
| 3899 | } | |||
| 3900 | ||||
| 3901 | drm_dp_sideband_parse_reply(mgr, msg, &txmsg->reply); | |||
| 3902 | ||||
| 3903 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 3904 | drm_dbg_kms(mgr->dev,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ) | |||
| 3905 | "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ) | |||
| 3906 | txmsg->reply.req_type,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ) | |||
| 3907 | drm_dp_mst_req_type_str(txmsg->reply.req_type),__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ) | |||
| 3908 | txmsg->reply.u.nak.reason,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ) | |||
| 3909 | drm_dp_mst_nak_reason_str(txmsg->reply.u.nak.reason),__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ) | |||
| 3910 | txmsg->reply.u.nak.nak_data)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got NAK reply: req 0x%02x (%s), reason 0x%02x (%s), nak data 0x%02x\n" , txmsg->reply.req_type, drm_dp_mst_req_type_str(txmsg-> reply.req_type), txmsg->reply.u.nak.reason, drm_dp_mst_nak_reason_str (txmsg->reply.u.nak.reason), txmsg->reply.u.nak.nak_data ); | |||
| 3911 | } | |||
| 3912 | ||||
| 3913 | memset(msg, 0, sizeof(struct drm_dp_sideband_msg_rx))__builtin_memset((msg), (0), (sizeof(struct drm_dp_sideband_msg_rx ))); | |||
| 3914 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3915 | ||||
| 3916 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 3917 | txmsg->state = DRM_DP_SIDEBAND_TX_RX3; | |||
| 3918 | list_del(&txmsg->next); | |||
| 3919 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 3920 | ||||
| 3921 | wake_up_all(&mgr->tx_waitq)wake_up(&mgr->tx_waitq); | |||
| 3922 | ||||
| 3923 | return 0; | |||
| 3924 | ||||
| 3925 | out_clear_reply: | |||
| 3926 | memset(msg, 0, sizeof(struct drm_dp_sideband_msg_rx))__builtin_memset((msg), (0), (sizeof(struct drm_dp_sideband_msg_rx ))); | |||
| 3927 | out: | |||
| 3928 | if (mstb) | |||
| 3929 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3930 | ||||
| 3931 | return 0; | |||
| 3932 | } | |||
| 3933 | ||||
| 3934 | static inline bool_Bool | |||
| 3935 | drm_dp_mst_process_up_req(struct drm_dp_mst_topology_mgr *mgr, | |||
| 3936 | struct drm_dp_pending_up_req *up_req) | |||
| 3937 | { | |||
| 3938 | struct drm_dp_mst_branch *mstb = NULL((void *)0); | |||
| 3939 | struct drm_dp_sideband_msg_req_body *msg = &up_req->msg; | |||
| 3940 | struct drm_dp_sideband_msg_hdr *hdr = &up_req->hdr; | |||
| 3941 | bool_Bool hotplug = false0, dowork = false0; | |||
| 3942 | ||||
| 3943 | if (hdr->broadcast) { | |||
| 3944 | const u8 *guid = NULL((void *)0); | |||
| 3945 | ||||
| 3946 | if (msg->req_type == DP_CONNECTION_STATUS_NOTIFY0x02) | |||
| 3947 | guid = msg->u.conn_stat.guid; | |||
| 3948 | else if (msg->req_type == DP_RESOURCE_STATUS_NOTIFY0x13) | |||
| 3949 | guid = msg->u.resource_stat.guid; | |||
| 3950 | ||||
| 3951 | if (guid) | |||
| 3952 | mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid); | |||
| 3953 | } else { | |||
| 3954 | mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad); | |||
| 3955 | } | |||
| 3956 | ||||
| 3957 | if (!mstb) { | |||
| 3958 | drm_dbg_kms(mgr->dev, "Got MST reply from unknown device %d\n", hdr->lct)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got MST reply from unknown device %d\n" , hdr->lct); | |||
| 3959 | return false0; | |||
| 3960 | } | |||
| 3961 | ||||
| 3962 | /* TODO: Add missing handler for DP_RESOURCE_STATUS_NOTIFY events */ | |||
| 3963 | if (msg->req_type == DP_CONNECTION_STATUS_NOTIFY0x02) { | |||
| 3964 | dowork = drm_dp_mst_handle_conn_stat(mstb, &msg->u.conn_stat); | |||
| 3965 | hotplug = true1; | |||
| 3966 | } | |||
| 3967 | ||||
| 3968 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 3969 | ||||
| 3970 | if (dowork) | |||
| 3971 | queue_work(system_long_wq, &mgr->work); | |||
| 3972 | return hotplug; | |||
| 3973 | } | |||
| 3974 | ||||
| 3975 | static void drm_dp_mst_up_req_work(struct work_struct *work) | |||
| 3976 | { | |||
| 3977 | struct drm_dp_mst_topology_mgr *mgr = | |||
| 3978 | container_of(work, struct drm_dp_mst_topology_mgr,({ const __typeof( ((struct drm_dp_mst_topology_mgr *)0)-> up_req_work ) *__mptr = (work); (struct drm_dp_mst_topology_mgr *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_mgr , up_req_work) );}) | |||
| 3979 | up_req_work)({ const __typeof( ((struct drm_dp_mst_topology_mgr *)0)-> up_req_work ) *__mptr = (work); (struct drm_dp_mst_topology_mgr *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_mgr , up_req_work) );}); | |||
| 3980 | struct drm_dp_pending_up_req *up_req; | |||
| 3981 | bool_Bool send_hotplug = false0; | |||
| 3982 | ||||
| 3983 | mutex_lock(&mgr->probe_lock)rw_enter_write(&mgr->probe_lock); | |||
| 3984 | while (true1) { | |||
| 3985 | mutex_lock(&mgr->up_req_lock)rw_enter_write(&mgr->up_req_lock); | |||
| 3986 | up_req = list_first_entry_or_null(&mgr->up_req_list,(list_empty(&mgr->up_req_list) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_pending_up_req *)0)->next ) *__mptr = ((&mgr->up_req_list)->next); (struct drm_dp_pending_up_req *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_pending_up_req , next) );})) | |||
| 3987 | struct drm_dp_pending_up_req,(list_empty(&mgr->up_req_list) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_pending_up_req *)0)->next ) *__mptr = ((&mgr->up_req_list)->next); (struct drm_dp_pending_up_req *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_pending_up_req , next) );})) | |||
| 3988 | next)(list_empty(&mgr->up_req_list) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_pending_up_req *)0)->next ) *__mptr = ((&mgr->up_req_list)->next); (struct drm_dp_pending_up_req *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_pending_up_req , next) );})); | |||
| 3989 | if (up_req) | |||
| 3990 | list_del(&up_req->next); | |||
| 3991 | mutex_unlock(&mgr->up_req_lock)rw_exit_write(&mgr->up_req_lock); | |||
| 3992 | ||||
| 3993 | if (!up_req) | |||
| 3994 | break; | |||
| 3995 | ||||
| 3996 | send_hotplug |= drm_dp_mst_process_up_req(mgr, up_req); | |||
| 3997 | kfree(up_req); | |||
| 3998 | } | |||
| 3999 | mutex_unlock(&mgr->probe_lock)rw_exit_write(&mgr->probe_lock); | |||
| 4000 | ||||
| 4001 | if (send_hotplug) | |||
| 4002 | drm_kms_helper_hotplug_event(mgr->dev); | |||
| 4003 | } | |||
| 4004 | ||||
| 4005 | static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) | |||
| 4006 | { | |||
| 4007 | struct drm_dp_pending_up_req *up_req; | |||
| 4008 | ||||
| 4009 | if (!drm_dp_get_one_sb_msg(mgr, true1, NULL((void *)0))) | |||
| 4010 | goto out; | |||
| 4011 | ||||
| 4012 | if (!mgr->up_req_recv.have_eomt) | |||
| 4013 | return 0; | |||
| 4014 | ||||
| 4015 | up_req = kzalloc(sizeof(*up_req), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 4016 | if (!up_req) | |||
| 4017 | return -ENOMEM12; | |||
| 4018 | ||||
| 4019 | INIT_LIST_HEAD(&up_req->next); | |||
| 4020 | ||||
| 4021 | drm_dp_sideband_parse_req(mgr, &mgr->up_req_recv, &up_req->msg); | |||
| 4022 | ||||
| 4023 | if (up_req->msg.req_type != DP_CONNECTION_STATUS_NOTIFY0x02 && | |||
| 4024 | up_req->msg.req_type != DP_RESOURCE_STATUS_NOTIFY0x13) { | |||
| 4025 | drm_dbg_kms(mgr->dev, "Received unknown up req type, ignoring: %x\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Received unknown up req type, ignoring: %x\n" , up_req->msg.req_type) | |||
| 4026 | up_req->msg.req_type)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Received unknown up req type, ignoring: %x\n" , up_req->msg.req_type); | |||
| 4027 | kfree(up_req); | |||
| 4028 | goto out; | |||
| 4029 | } | |||
| 4030 | ||||
| 4031 | drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, up_req->msg.req_type, | |||
| 4032 | false0); | |||
| 4033 | ||||
| 4034 | if (up_req->msg.req_type == DP_CONNECTION_STATUS_NOTIFY0x02) { | |||
| 4035 | const struct drm_dp_connection_status_notify *conn_stat = | |||
| 4036 | &up_req->msg.u.conn_stat; | |||
| 4037 | ||||
| 4038 | drm_dbg_kms(mgr->dev, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type) | |||
| 4039 | conn_stat->port_number,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type) | |||
| 4040 | conn_stat->legacy_device_plug_status,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type) | |||
| 4041 | conn_stat->displayport_device_plug_status,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type) | |||
| 4042 | conn_stat->message_capability_status,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type) | |||
| 4043 | conn_stat->input_port,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type) | |||
| 4044 | conn_stat->peer_device_type)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n" , conn_stat->port_number, conn_stat->legacy_device_plug_status , conn_stat->displayport_device_plug_status, conn_stat-> message_capability_status, conn_stat->input_port, conn_stat ->peer_device_type); | |||
| 4045 | } else if (up_req->msg.req_type == DP_RESOURCE_STATUS_NOTIFY0x13) { | |||
| 4046 | const struct drm_dp_resource_status_notify *res_stat = | |||
| 4047 | &up_req->msg.u.resource_stat; | |||
| 4048 | ||||
| 4049 | drm_dbg_kms(mgr->dev, "Got RSN: pn: %d avail_pbn %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got RSN: pn: %d avail_pbn %d\n" , res_stat->port_number, res_stat->available_pbn) | |||
| 4050 | res_stat->port_number,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got RSN: pn: %d avail_pbn %d\n" , res_stat->port_number, res_stat->available_pbn) | |||
| 4051 | res_stat->available_pbn)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Got RSN: pn: %d avail_pbn %d\n" , res_stat->port_number, res_stat->available_pbn); | |||
| 4052 | } | |||
| 4053 | ||||
| 4054 | up_req->hdr = mgr->up_req_recv.initial_hdr; | |||
| 4055 | mutex_lock(&mgr->up_req_lock)rw_enter_write(&mgr->up_req_lock); | |||
| 4056 | list_add_tail(&up_req->next, &mgr->up_req_list); | |||
| 4057 | mutex_unlock(&mgr->up_req_lock)rw_exit_write(&mgr->up_req_lock); | |||
| 4058 | queue_work(system_long_wq, &mgr->up_req_work); | |||
| 4059 | ||||
| 4060 | out: | |||
| 4061 | memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx))__builtin_memset((&mgr->up_req_recv), (0), (sizeof(struct drm_dp_sideband_msg_rx))); | |||
| 4062 | return 0; | |||
| 4063 | } | |||
| 4064 | ||||
| 4065 | /** | |||
| 4066 | * drm_dp_mst_hpd_irq_handle_event() - MST hotplug IRQ handle MST event | |||
| 4067 | * @mgr: manager to notify irq for. | |||
| 4068 | * @esi: 4 bytes from SINK_COUNT_ESI | |||
| 4069 | * @ack: 4 bytes used to ack events starting from SINK_COUNT_ESI | |||
| 4070 | * @handled: whether the hpd interrupt was consumed or not | |||
| 4071 | * | |||
| 4072 | * This should be called from the driver when it detects a HPD IRQ, | |||
| 4073 | * along with the value of the DEVICE_SERVICE_IRQ_VECTOR_ESI0. The | |||
| 4074 | * topology manager will process the sideband messages received | |||
| 4075 | * as indicated in the DEVICE_SERVICE_IRQ_VECTOR_ESI0 and set the | |||
| 4076 | * corresponding flags that Driver has to ack the DP receiver later. | |||
| 4077 | * | |||
| 4078 | * Note that driver shall also call | |||
| 4079 | * drm_dp_mst_hpd_irq_send_new_request() if the 'handled' is set | |||
| 4080 | * after calling this function, to try to kick off a new request in | |||
| 4081 | * the queue if the previous message transaction is completed. | |||
| 4082 | * | |||
| 4083 | * See also: | |||
| 4084 | * drm_dp_mst_hpd_irq_send_new_request() | |||
| 4085 | */ | |||
| 4086 | int drm_dp_mst_hpd_irq_handle_event(struct drm_dp_mst_topology_mgr *mgr, const u8 *esi, | |||
| 4087 | u8 *ack, bool_Bool *handled) | |||
| 4088 | { | |||
| 4089 | int ret = 0; | |||
| 4090 | int sc; | |||
| 4091 | *handled = false0; | |||
| 4092 | sc = DP_GET_SINK_COUNT(esi[0])((((esi[0]) & 0x80) >> 1) | ((esi[0]) & 0x3f)); | |||
| 4093 | ||||
| 4094 | if (sc != mgr->sink_count) { | |||
| ||||
| 4095 | mgr->sink_count = sc; | |||
| 4096 | *handled = true1; | |||
| 4097 | } | |||
| 4098 | ||||
| 4099 | if (esi[1] & DP_DOWN_REP_MSG_RDY(1 << 4)) { | |||
| 4100 | ret = drm_dp_mst_handle_down_rep(mgr); | |||
| 4101 | *handled = true1; | |||
| 4102 | ack[1] |= DP_DOWN_REP_MSG_RDY(1 << 4); | |||
| 4103 | } | |||
| 4104 | ||||
| 4105 | if (esi[1] & DP_UP_REQ_MSG_RDY(1 << 5)) { | |||
| 4106 | ret |= drm_dp_mst_handle_up_req(mgr); | |||
| 4107 | *handled = true1; | |||
| 4108 | ack[1] |= DP_UP_REQ_MSG_RDY(1 << 5); | |||
| 4109 | } | |||
| 4110 | ||||
| 4111 | return ret; | |||
| 4112 | } | |||
| 4113 | EXPORT_SYMBOL(drm_dp_mst_hpd_irq_handle_event); | |||
| 4114 | ||||
| 4115 | /** | |||
| 4116 | * drm_dp_mst_hpd_irq_send_new_request() - MST hotplug IRQ kick off new request | |||
| 4117 | * @mgr: manager to notify irq for. | |||
| 4118 | * | |||
| 4119 | * This should be called from the driver when mst irq event is handled | |||
| 4120 | * and acked. Note that new down request should only be sent when | |||
| 4121 | * previous message transaction is completed. Source is not supposed to generate | |||
| 4122 | * interleaved message transactions. | |||
| 4123 | */ | |||
| 4124 | void drm_dp_mst_hpd_irq_send_new_request(struct drm_dp_mst_topology_mgr *mgr) | |||
| 4125 | { | |||
| 4126 | struct drm_dp_sideband_msg_tx *txmsg; | |||
| 4127 | bool_Bool kick = true1; | |||
| 4128 | ||||
| 4129 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 4130 | txmsg = list_first_entry_or_null(&mgr->tx_msg_downq,(list_empty(&mgr->tx_msg_downq) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_sideband_msg_tx *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (struct drm_dp_sideband_msg_tx *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_sideband_msg_tx , next) );})) | |||
| 4131 | struct drm_dp_sideband_msg_tx, next)(list_empty(&mgr->tx_msg_downq) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_sideband_msg_tx *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (struct drm_dp_sideband_msg_tx *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_sideband_msg_tx , next) );})); | |||
| 4132 | /* If last transaction is not completed yet*/ | |||
| 4133 | if (!txmsg || | |||
| 4134 | txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND1 || | |||
| 4135 | txmsg->state == DRM_DP_SIDEBAND_TX_SENT2) | |||
| 4136 | kick = false0; | |||
| 4137 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 4138 | ||||
| 4139 | if (kick) | |||
| 4140 | drm_dp_mst_kick_tx(mgr); | |||
| 4141 | } | |||
| 4142 | EXPORT_SYMBOL(drm_dp_mst_hpd_irq_send_new_request); | |||
| 4143 | /** | |||
| 4144 | * drm_dp_mst_detect_port() - get connection status for an MST port | |||
| 4145 | * @connector: DRM connector for this port | |||
| 4146 | * @ctx: The acquisition context to use for grabbing locks | |||
| 4147 | * @mgr: manager for this port | |||
| 4148 | * @port: pointer to a port | |||
| 4149 | * | |||
| 4150 | * This returns the current connection state for a port. | |||
| 4151 | */ | |||
| 4152 | int | |||
| 4153 | drm_dp_mst_detect_port(struct drm_connector *connector, | |||
| 4154 | struct drm_modeset_acquire_ctx *ctx, | |||
| 4155 | struct drm_dp_mst_topology_mgr *mgr, | |||
| 4156 | struct drm_dp_mst_port *port) | |||
| 4157 | { | |||
| 4158 | int ret; | |||
| 4159 | ||||
| 4160 | /* we need to search for the port in the mgr in case it's gone */ | |||
| 4161 | port = drm_dp_mst_topology_get_port_validated(mgr, port); | |||
| 4162 | if (!port) | |||
| 4163 | return connector_status_disconnected; | |||
| 4164 | ||||
| 4165 | ret = drm_modeset_lock(&mgr->base.lock, ctx); | |||
| 4166 | if (ret) | |||
| 4167 | goto out; | |||
| 4168 | ||||
| 4169 | ret = connector_status_disconnected; | |||
| 4170 | ||||
| 4171 | if (!port->ddps) | |||
| 4172 | goto out; | |||
| 4173 | ||||
| 4174 | switch (port->pdt) { | |||
| 4175 | case DP_PEER_DEVICE_NONE0x0: | |||
| 4176 | break; | |||
| 4177 | case DP_PEER_DEVICE_MST_BRANCHING0x2: | |||
| 4178 | if (!port->mcs) | |||
| 4179 | ret = connector_status_connected; | |||
| 4180 | break; | |||
| 4181 | ||||
| 4182 | case DP_PEER_DEVICE_SST_SINK0x3: | |||
| 4183 | ret = connector_status_connected; | |||
| 4184 | /* for logical ports - cache the EDID */ | |||
| 4185 | if (port->port_num >= DP_MST_LOGICAL_PORT_08 && !port->cached_edid) | |||
| 4186 | port->cached_edid = drm_get_edid(connector, &port->aux.ddc); | |||
| 4187 | break; | |||
| 4188 | case DP_PEER_DEVICE_DP_LEGACY_CONV0x4: | |||
| 4189 | if (port->ldps) | |||
| 4190 | ret = connector_status_connected; | |||
| 4191 | break; | |||
| 4192 | } | |||
| 4193 | out: | |||
| 4194 | drm_dp_mst_topology_put_port(port); | |||
| 4195 | return ret; | |||
| 4196 | } | |||
| 4197 | EXPORT_SYMBOL(drm_dp_mst_detect_port); | |||
| 4198 | ||||
| 4199 | /** | |||
| 4200 | * drm_dp_mst_get_edid() - get EDID for an MST port | |||
| 4201 | * @connector: toplevel connector to get EDID for | |||
| 4202 | * @mgr: manager for this port | |||
| 4203 | * @port: unverified pointer to a port. | |||
| 4204 | * | |||
| 4205 | * This returns an EDID for the port connected to a connector, | |||
| 4206 | * It validates the pointer still exists so the caller doesn't require a | |||
| 4207 | * reference. | |||
| 4208 | */ | |||
| 4209 | struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port) | |||
| 4210 | { | |||
| 4211 | struct edid *edid = NULL((void *)0); | |||
| 4212 | ||||
| 4213 | /* we need to search for the port in the mgr in case it's gone */ | |||
| 4214 | port = drm_dp_mst_topology_get_port_validated(mgr, port); | |||
| 4215 | if (!port) | |||
| 4216 | return NULL((void *)0); | |||
| 4217 | ||||
| 4218 | if (port->cached_edid) | |||
| 4219 | edid = drm_edid_duplicate(port->cached_edid); | |||
| 4220 | else { | |||
| 4221 | edid = drm_get_edid(connector, &port->aux.ddc); | |||
| 4222 | } | |||
| 4223 | port->has_audio = drm_detect_monitor_audio(edid); | |||
| 4224 | drm_dp_mst_topology_put_port(port); | |||
| 4225 | return edid; | |||
| 4226 | } | |||
| 4227 | EXPORT_SYMBOL(drm_dp_mst_get_edid); | |||
| 4228 | ||||
| 4229 | /** | |||
| 4230 | * drm_dp_atomic_find_time_slots() - Find and add time slots to the state | |||
| 4231 | * @state: global atomic state | |||
| 4232 | * @mgr: MST topology manager for the port | |||
| 4233 | * @port: port to find time slots for | |||
| 4234 | * @pbn: bandwidth required for the mode in PBN | |||
| 4235 | * | |||
| 4236 | * Allocates time slots to @port, replacing any previous time slot allocations it may | |||
| 4237 | * have had. Any atomic drivers which support MST must call this function in | |||
| 4238 | * their &drm_encoder_helper_funcs.atomic_check() callback unconditionally to | |||
| 4239 | * change the current time slot allocation for the new state, and ensure the MST | |||
| 4240 | * atomic state is added whenever the state of payloads in the topology changes. | |||
| 4241 | * | |||
| 4242 | * Allocations set by this function are not checked against the bandwidth | |||
| 4243 | * restraints of @mgr until the driver calls drm_dp_mst_atomic_check(). | |||
| 4244 | * | |||
| 4245 | * Additionally, it is OK to call this function multiple times on the same | |||
| 4246 | * @port as needed. It is not OK however, to call this function and | |||
| 4247 | * drm_dp_atomic_release_time_slots() in the same atomic check phase. | |||
| 4248 | * | |||
| 4249 | * See also: | |||
| 4250 | * drm_dp_atomic_release_time_slots() | |||
| 4251 | * drm_dp_mst_atomic_check() | |||
| 4252 | * | |||
| 4253 | * Returns: | |||
| 4254 | * Total slots in the atomic state assigned for this port, or a negative error | |||
| 4255 | * code if the port no longer exists | |||
| 4256 | */ | |||
| 4257 | int drm_dp_atomic_find_time_slots(struct drm_atomic_state *state, | |||
| 4258 | struct drm_dp_mst_topology_mgr *mgr, | |||
| 4259 | struct drm_dp_mst_port *port, int pbn) | |||
| 4260 | { | |||
| 4261 | struct drm_dp_mst_topology_state *topology_state; | |||
| 4262 | struct drm_dp_mst_atomic_payload *payload = NULL((void *)0); | |||
| 4263 | struct drm_connector_state *conn_state; | |||
| 4264 | int prev_slots = 0, prev_bw = 0, req_slots; | |||
| 4265 | ||||
| 4266 | topology_state = drm_atomic_get_mst_topology_state(state, mgr); | |||
| 4267 | if (IS_ERR(topology_state)) | |||
| 4268 | return PTR_ERR(topology_state); | |||
| 4269 | ||||
| 4270 | conn_state = drm_atomic_get_new_connector_state(state, port->connector); | |||
| 4271 | topology_state->pending_crtc_mask |= drm_crtc_mask(conn_state->crtc); | |||
| 4272 | ||||
| 4273 | /* Find the current allocation for this port, if any */ | |||
| 4274 | payload = drm_atomic_get_mst_payload_state(topology_state, port); | |||
| 4275 | if (payload) { | |||
| 4276 | prev_slots = payload->time_slots; | |||
| 4277 | prev_bw = payload->pbn; | |||
| 4278 | ||||
| 4279 | /* | |||
| 4280 | * This should never happen, unless the driver tries | |||
| 4281 | * releasing and allocating the same timeslot allocation, | |||
| 4282 | * which is an error | |||
| 4283 | */ | |||
| 4284 | if (drm_WARN_ON(mgr->dev, payload->delete)({ int __ret = !!((payload->delete)); if (__ret) printf("%s %s: " "%s", dev_driver_string(((mgr->dev))->dev), "", "drm_WARN_ON(" "payload->delete" ")"); __builtin_expect(!!(__ret), 0); } )) { | |||
| 4285 | drm_err(mgr->dev,printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "cannot allocate and release time slots on [MST PORT:%p] in the same state\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port) | |||
| 4286 | "cannot allocate and release time slots on [MST PORT:%p] in the same state\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "cannot allocate and release time slots on [MST PORT:%p] in the same state\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port) | |||
| 4287 | port)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "cannot allocate and release time slots on [MST PORT:%p] in the same state\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port); | |||
| 4288 | return -EINVAL22; | |||
| 4289 | } | |||
| 4290 | } | |||
| 4291 | ||||
| 4292 | req_slots = DIV_ROUND_UP(pbn, topology_state->pbn_div)(((pbn) + ((topology_state->pbn_div) - 1)) / (topology_state ->pbn_div)); | |||
| 4293 | ||||
| 4294 | drm_dbg_atomic(mgr->dev, "[CONNECTOR:%d:%s] [MST PORT:%p] TU %d -> %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[CONNECTOR:%d:%s] [MST PORT:%p] TU %d -> %d\n" , port->connector->base.id, port->connector->name , port, prev_slots, req_slots) | |||
| 4295 | port->connector->base.id, port->connector->name,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[CONNECTOR:%d:%s] [MST PORT:%p] TU %d -> %d\n" , port->connector->base.id, port->connector->name , port, prev_slots, req_slots) | |||
| 4296 | port, prev_slots, req_slots)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[CONNECTOR:%d:%s] [MST PORT:%p] TU %d -> %d\n" , port->connector->base.id, port->connector->name , port, prev_slots, req_slots); | |||
| 4297 | drm_dbg_atomic(mgr->dev, "[CONNECTOR:%d:%s] [MST PORT:%p] PBN %d -> %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[CONNECTOR:%d:%s] [MST PORT:%p] PBN %d -> %d\n" , port->connector->base.id, port->connector->name , port, prev_bw, pbn) | |||
| 4298 | port->connector->base.id, port->connector->name,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[CONNECTOR:%d:%s] [MST PORT:%p] PBN %d -> %d\n" , port->connector->base.id, port->connector->name , port, prev_bw, pbn) | |||
| 4299 | port, prev_bw, pbn)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[CONNECTOR:%d:%s] [MST PORT:%p] PBN %d -> %d\n" , port->connector->base.id, port->connector->name , port, prev_bw, pbn); | |||
| 4300 | ||||
| 4301 | /* Add the new allocation to the state, note the VCPI isn't assigned until the end */ | |||
| 4302 | if (!payload) { | |||
| 4303 | payload = kzalloc(sizeof(*payload), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 4304 | if (!payload) | |||
| 4305 | return -ENOMEM12; | |||
| 4306 | ||||
| 4307 | drm_dp_mst_get_port_malloc(port); | |||
| 4308 | payload->port = port; | |||
| 4309 | payload->vc_start_slot = -1; | |||
| 4310 | list_add(&payload->next, &topology_state->payloads); | |||
| 4311 | } | |||
| 4312 | payload->time_slots = req_slots; | |||
| 4313 | payload->pbn = pbn; | |||
| 4314 | ||||
| 4315 | return req_slots; | |||
| 4316 | } | |||
| 4317 | EXPORT_SYMBOL(drm_dp_atomic_find_time_slots); | |||
| 4318 | ||||
| 4319 | /** | |||
| 4320 | * drm_dp_atomic_release_time_slots() - Release allocated time slots | |||
| 4321 | * @state: global atomic state | |||
| 4322 | * @mgr: MST topology manager for the port | |||
| 4323 | * @port: The port to release the time slots from | |||
| 4324 | * | |||
| 4325 | * Releases any time slots that have been allocated to a port in the atomic | |||
| 4326 | * state. Any atomic drivers which support MST must call this function | |||
| 4327 | * unconditionally in their &drm_connector_helper_funcs.atomic_check() callback. | |||
| 4328 | * This helper will check whether time slots would be released by the new state and | |||
| 4329 | * respond accordingly, along with ensuring the MST state is always added to the | |||
| 4330 | * atomic state whenever a new state would modify the state of payloads on the | |||
| 4331 | * topology. | |||
| 4332 | * | |||
| 4333 | * It is OK to call this even if @port has been removed from the system. | |||
| 4334 | * Additionally, it is OK to call this function multiple times on the same | |||
| 4335 | * @port as needed. It is not OK however, to call this function and | |||
| 4336 | * drm_dp_atomic_find_time_slots() on the same @port in a single atomic check | |||
| 4337 | * phase. | |||
| 4338 | * | |||
| 4339 | * See also: | |||
| 4340 | * drm_dp_atomic_find_time_slots() | |||
| 4341 | * drm_dp_mst_atomic_check() | |||
| 4342 | * | |||
| 4343 | * Returns: | |||
| 4344 | * 0 on success, negative error code otherwise | |||
| 4345 | */ | |||
| 4346 | int drm_dp_atomic_release_time_slots(struct drm_atomic_state *state, | |||
| 4347 | struct drm_dp_mst_topology_mgr *mgr, | |||
| 4348 | struct drm_dp_mst_port *port) | |||
| 4349 | { | |||
| 4350 | struct drm_dp_mst_topology_state *topology_state; | |||
| 4351 | struct drm_dp_mst_atomic_payload *payload; | |||
| 4352 | struct drm_connector_state *old_conn_state, *new_conn_state; | |||
| 4353 | bool_Bool update_payload = true1; | |||
| 4354 | ||||
| 4355 | old_conn_state = drm_atomic_get_old_connector_state(state, port->connector); | |||
| 4356 | if (!old_conn_state->crtc) | |||
| 4357 | return 0; | |||
| 4358 | ||||
| 4359 | /* If the CRTC isn't disabled by this state, don't release it's payload */ | |||
| 4360 | new_conn_state = drm_atomic_get_new_connector_state(state, port->connector); | |||
| 4361 | if (new_conn_state->crtc) { | |||
| 4362 | struct drm_crtc_state *crtc_state = | |||
| 4363 | drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); | |||
| 4364 | ||||
| 4365 | /* No modeset means no payload changes, so it's safe to not pull in the MST state */ | |||
| 4366 | if (!crtc_state || !drm_atomic_crtc_needs_modeset(crtc_state)) | |||
| 4367 | return 0; | |||
| 4368 | ||||
| 4369 | if (!crtc_state->mode_changed && !crtc_state->connectors_changed) | |||
| 4370 | update_payload = false0; | |||
| 4371 | } | |||
| 4372 | ||||
| 4373 | topology_state = drm_atomic_get_mst_topology_state(state, mgr); | |||
| 4374 | if (IS_ERR(topology_state)) | |||
| 4375 | return PTR_ERR(topology_state); | |||
| 4376 | ||||
| 4377 | topology_state->pending_crtc_mask |= drm_crtc_mask(old_conn_state->crtc); | |||
| 4378 | if (!update_payload) | |||
| 4379 | return 0; | |||
| 4380 | ||||
| 4381 | payload = drm_atomic_get_mst_payload_state(topology_state, port); | |||
| 4382 | if (WARN_ON(!payload)({ int __ret = !!(!payload); if (__ret) printf("WARNING %s failed at %s:%d\n" , "!payload", "/usr/src/sys/dev/pci/drm/display/drm_dp_mst_topology.c" , 4382); __builtin_expect(!!(__ret), 0); })) { | |||
| 4383 | drm_err(mgr->dev, "No payload for [MST PORT:%p] found in mst state %p\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "No payload for [MST PORT:%p] found in mst state %p\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port, & topology_state->base) | |||
| 4384 | port, &topology_state->base)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "No payload for [MST PORT:%p] found in mst state %p\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , port, & topology_state->base); | |||
| 4385 | return -EINVAL22; | |||
| 4386 | } | |||
| 4387 | ||||
| 4388 | if (new_conn_state->crtc) | |||
| 4389 | return 0; | |||
| 4390 | ||||
| 4391 | drm_dbg_atomic(mgr->dev, "[MST PORT:%p] TU %d -> 0\n", port, payload->time_slots)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] TU %d -> 0\n" , port, payload->time_slots); | |||
| 4392 | if (!payload->delete) { | |||
| 4393 | payload->pbn = 0; | |||
| 4394 | payload->delete = true1; | |||
| 4395 | topology_state->payload_mask &= ~BIT(payload->vcpi - 1)(1UL << (payload->vcpi - 1)); | |||
| 4396 | } | |||
| 4397 | ||||
| 4398 | return 0; | |||
| 4399 | } | |||
| 4400 | EXPORT_SYMBOL(drm_dp_atomic_release_time_slots); | |||
| 4401 | ||||
| 4402 | /** | |||
| 4403 | * drm_dp_mst_atomic_setup_commit() - setup_commit hook for MST helpers | |||
| 4404 | * @state: global atomic state | |||
| 4405 | * | |||
| 4406 | * This function saves all of the &drm_crtc_commit structs in an atomic state that touch any CRTCs | |||
| 4407 | * currently assigned to an MST topology. Drivers must call this hook from their | |||
| 4408 | * &drm_mode_config_helper_funcs.atomic_commit_setup hook. | |||
| 4409 | * | |||
| 4410 | * Returns: | |||
| 4411 | * 0 if all CRTC commits were retrieved successfully, negative error code otherwise | |||
| 4412 | */ | |||
| 4413 | int drm_dp_mst_atomic_setup_commit(struct drm_atomic_state *state) | |||
| 4414 | { | |||
| 4415 | struct drm_dp_mst_topology_mgr *mgr; | |||
| 4416 | struct drm_dp_mst_topology_state *mst_state; | |||
| 4417 | struct drm_crtc *crtc; | |||
| 4418 | struct drm_crtc_state *crtc_state; | |||
| 4419 | int i, j, commit_idx, num_commit_deps; | |||
| 4420 | ||||
| 4421 | for_each_new_mst_mgr_in_state(state, mgr, mst_state, i)for ((i) = 0; (i) < (state)->num_private_objs; (i)++) if (!(__drm_dp_mst_state_iter_get((state), &(mgr), ((void * )0), &(mst_state), (i)))) {} else { | |||
| 4422 | if (!mst_state->pending_crtc_mask) | |||
| 4423 | continue; | |||
| 4424 | ||||
| 4425 | num_commit_deps = hweight32(mst_state->pending_crtc_mask); | |||
| 4426 | mst_state->commit_deps = kmalloc_array(num_commit_deps, | |||
| 4427 | sizeof(*mst_state->commit_deps), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 4428 | if (!mst_state->commit_deps) | |||
| 4429 | return -ENOMEM12; | |||
| 4430 | mst_state->num_commit_deps = num_commit_deps; | |||
| 4431 | ||||
| 4432 | commit_idx = 0; | |||
| 4433 | for_each_new_crtc_in_state(state, crtc, crtc_state, j)for ((j) = 0; (j) < (state)->dev->mode_config.num_crtc ; (j)++) if (!((state)->crtcs[j].ptr && ((crtc) = ( state)->crtcs[j].ptr, (void)(crtc) , (crtc_state) = (state )->crtcs[j].new_state, (void)(crtc_state) , 1))) {} else { | |||
| 4434 | if (mst_state->pending_crtc_mask & drm_crtc_mask(crtc)) { | |||
| 4435 | mst_state->commit_deps[commit_idx++] = | |||
| 4436 | drm_crtc_commit_get(crtc_state->commit); | |||
| 4437 | } | |||
| 4438 | } | |||
| 4439 | } | |||
| 4440 | ||||
| 4441 | return 0; | |||
| 4442 | } | |||
| 4443 | EXPORT_SYMBOL(drm_dp_mst_atomic_setup_commit); | |||
| 4444 | ||||
| 4445 | /** | |||
| 4446 | * drm_dp_mst_atomic_wait_for_dependencies() - Wait for all pending commits on MST topologies, | |||
| 4447 | * prepare new MST state for commit | |||
| 4448 | * @state: global atomic state | |||
| 4449 | * | |||
| 4450 | * Goes through any MST topologies in this atomic state, and waits for any pending commits which | |||
| 4451 | * touched CRTCs that were/are on an MST topology to be programmed to hardware and flipped to before | |||
| 4452 | * returning. This is to prevent multiple non-blocking commits affecting an MST topology from racing | |||
| 4453 | * with eachother by forcing them to be executed sequentially in situations where the only resources | |||
| 4454 | * the modeset objects in these commits share are an MST topology. | |||
| 4455 | * | |||
| 4456 | * This function also prepares the new MST state for commit by performing some state preparation | |||
| 4457 | * which can't be done until this point, such as reading back the final VC start slots (which are | |||
| 4458 | * determined at commit-time) from the previous state. | |||
| 4459 | * | |||
| 4460 | * All MST drivers must call this function after calling drm_atomic_helper_wait_for_dependencies(), | |||
| 4461 | * or whatever their equivalent of that is. | |||
| 4462 | */ | |||
| 4463 | void drm_dp_mst_atomic_wait_for_dependencies(struct drm_atomic_state *state) | |||
| 4464 | { | |||
| 4465 | struct drm_dp_mst_topology_state *old_mst_state, *new_mst_state; | |||
| 4466 | struct drm_dp_mst_topology_mgr *mgr; | |||
| 4467 | struct drm_dp_mst_atomic_payload *old_payload, *new_payload; | |||
| 4468 | int i, j, ret; | |||
| 4469 | ||||
| 4470 | for_each_oldnew_mst_mgr_in_state(state, mgr, old_mst_state, new_mst_state, i)for ((i) = 0; (i) < (state)->num_private_objs; (i)++) if (!(__drm_dp_mst_state_iter_get((state), &(mgr), &(old_mst_state ), &(new_mst_state), (i)))) {} else { | |||
| 4471 | for (j = 0; j < old_mst_state->num_commit_deps; j++) { | |||
| 4472 | ret = drm_crtc_commit_wait(old_mst_state->commit_deps[j]); | |||
| 4473 | if (ret < 0) | |||
| 4474 | drm_err(state->dev, "Failed to wait for %s: %d\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to wait for %s: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , old_mst_state ->commit_deps[j]->crtc->name, ret) | |||
| 4475 | old_mst_state->commit_deps[j]->crtc->name, ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to wait for %s: %d\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , old_mst_state ->commit_deps[j]->crtc->name, ret); | |||
| 4476 | } | |||
| 4477 | ||||
| 4478 | /* Now that previous state is committed, it's safe to copy over the start slot | |||
| 4479 | * assignments | |||
| 4480 | */ | |||
| 4481 | list_for_each_entry(old_payload, &old_mst_state->payloads, next)for (old_payload = ({ const __typeof( ((__typeof(*old_payload ) *)0)->next ) *__mptr = ((&old_mst_state->payloads )->next); (__typeof(*old_payload) *)( (char *)__mptr - __builtin_offsetof (__typeof(*old_payload), next) );}); &old_payload->next != (&old_mst_state->payloads); old_payload = ({ const __typeof( ((__typeof(*old_payload) *)0)->next ) *__mptr = (old_payload->next.next); (__typeof(*old_payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(*old_payload), next) ) ;})) { | |||
| 4482 | if (old_payload->delete) | |||
| 4483 | continue; | |||
| 4484 | ||||
| 4485 | new_payload = drm_atomic_get_mst_payload_state(new_mst_state, | |||
| 4486 | old_payload->port); | |||
| 4487 | new_payload->vc_start_slot = old_payload->vc_start_slot; | |||
| 4488 | } | |||
| 4489 | } | |||
| 4490 | } | |||
| 4491 | EXPORT_SYMBOL(drm_dp_mst_atomic_wait_for_dependencies); | |||
| 4492 | ||||
| 4493 | /** | |||
| 4494 | * drm_dp_mst_root_conn_atomic_check() - Serialize CRTC commits on MST-capable connectors operating | |||
| 4495 | * in SST mode | |||
| 4496 | * @new_conn_state: The new connector state of the &drm_connector | |||
| 4497 | * @mgr: The MST topology manager for the &drm_connector | |||
| 4498 | * | |||
| 4499 | * Since MST uses fake &drm_encoder structs, the generic atomic modesetting code isn't able to | |||
| 4500 | * serialize non-blocking commits happening on the real DP connector of an MST topology switching | |||
| 4501 | * into/away from MST mode - as the CRTC on the real DP connector and the CRTCs on the connector's | |||
| 4502 | * MST topology will never share the same &drm_encoder. | |||
| 4503 | * | |||
| 4504 | * This function takes care of this serialization issue, by checking a root MST connector's atomic | |||
| 4505 | * state to determine if it is about to have a modeset - and then pulling in the MST topology state | |||
| 4506 | * if so, along with adding any relevant CRTCs to &drm_dp_mst_topology_state.pending_crtc_mask. | |||
| 4507 | * | |||
| 4508 | * Drivers implementing MST must call this function from the | |||
| 4509 | * &drm_connector_helper_funcs.atomic_check hook of any physical DP &drm_connector capable of | |||
| 4510 | * driving MST sinks. | |||
| 4511 | * | |||
| 4512 | * Returns: | |||
| 4513 | * 0 on success, negative error code otherwise | |||
| 4514 | */ | |||
| 4515 | int drm_dp_mst_root_conn_atomic_check(struct drm_connector_state *new_conn_state, | |||
| 4516 | struct drm_dp_mst_topology_mgr *mgr) | |||
| 4517 | { | |||
| 4518 | struct drm_atomic_state *state = new_conn_state->state; | |||
| 4519 | struct drm_connector_state *old_conn_state = | |||
| 4520 | drm_atomic_get_old_connector_state(state, new_conn_state->connector); | |||
| 4521 | struct drm_crtc_state *crtc_state; | |||
| 4522 | struct drm_dp_mst_topology_state *mst_state = NULL((void *)0); | |||
| 4523 | ||||
| 4524 | if (new_conn_state->crtc) { | |||
| 4525 | crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); | |||
| 4526 | if (crtc_state && drm_atomic_crtc_needs_modeset(crtc_state)) { | |||
| 4527 | mst_state = drm_atomic_get_mst_topology_state(state, mgr); | |||
| 4528 | if (IS_ERR(mst_state)) | |||
| 4529 | return PTR_ERR(mst_state); | |||
| 4530 | ||||
| 4531 | mst_state->pending_crtc_mask |= drm_crtc_mask(new_conn_state->crtc); | |||
| 4532 | } | |||
| 4533 | } | |||
| 4534 | ||||
| 4535 | if (old_conn_state->crtc) { | |||
| 4536 | crtc_state = drm_atomic_get_new_crtc_state(state, old_conn_state->crtc); | |||
| 4537 | if (crtc_state && drm_atomic_crtc_needs_modeset(crtc_state)) { | |||
| 4538 | if (!mst_state) { | |||
| 4539 | mst_state = drm_atomic_get_mst_topology_state(state, mgr); | |||
| 4540 | if (IS_ERR(mst_state)) | |||
| 4541 | return PTR_ERR(mst_state); | |||
| 4542 | } | |||
| 4543 | ||||
| 4544 | mst_state->pending_crtc_mask |= drm_crtc_mask(old_conn_state->crtc); | |||
| 4545 | } | |||
| 4546 | } | |||
| 4547 | ||||
| 4548 | return 0; | |||
| 4549 | } | |||
| 4550 | EXPORT_SYMBOL(drm_dp_mst_root_conn_atomic_check); | |||
| 4551 | ||||
| 4552 | /** | |||
| 4553 | * drm_dp_mst_update_slots() - updates the slot info depending on the DP ecoding format | |||
| 4554 | * @mst_state: mst_state to update | |||
| 4555 | * @link_encoding_cap: the ecoding format on the link | |||
| 4556 | */ | |||
| 4557 | void drm_dp_mst_update_slots(struct drm_dp_mst_topology_state *mst_state, uint8_t link_encoding_cap) | |||
| 4558 | { | |||
| 4559 | if (link_encoding_cap == DP_CAP_ANSI_128B132B(1 << 1)) { | |||
| 4560 | mst_state->total_avail_slots = 64; | |||
| 4561 | mst_state->start_slot = 0; | |||
| 4562 | } else { | |||
| 4563 | mst_state->total_avail_slots = 63; | |||
| 4564 | mst_state->start_slot = 1; | |||
| 4565 | } | |||
| 4566 | ||||
| 4567 | DRM_DEBUG_KMS("%s encoding format on mst_state 0x%p\n",___drm_dbg(((void *)0), DRM_UT_KMS, "%s encoding format on mst_state 0x%p\n" , (link_encoding_cap == (1 << 1)) ? "128b/132b":"8b/10b" , mst_state) | |||
| 4568 | (link_encoding_cap == DP_CAP_ANSI_128B132B) ? "128b/132b":"8b/10b",___drm_dbg(((void *)0), DRM_UT_KMS, "%s encoding format on mst_state 0x%p\n" , (link_encoding_cap == (1 << 1)) ? "128b/132b":"8b/10b" , mst_state) | |||
| 4569 | mst_state)___drm_dbg(((void *)0), DRM_UT_KMS, "%s encoding format on mst_state 0x%p\n" , (link_encoding_cap == (1 << 1)) ? "128b/132b":"8b/10b" , mst_state); | |||
| 4570 | } | |||
| 4571 | EXPORT_SYMBOL(drm_dp_mst_update_slots); | |||
| 4572 | ||||
| 4573 | static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, | |||
| 4574 | int id, u8 start_slot, u8 num_slots) | |||
| 4575 | { | |||
| 4576 | u8 payload_alloc[3], status; | |||
| 4577 | int ret; | |||
| 4578 | int retries = 0; | |||
| 4579 | ||||
| 4580 | drm_dp_dpcd_writeb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS0x2c0, | |||
| 4581 | DP_PAYLOAD_TABLE_UPDATED(1 << 0)); | |||
| 4582 | ||||
| 4583 | payload_alloc[0] = id; | |||
| 4584 | payload_alloc[1] = start_slot; | |||
| 4585 | payload_alloc[2] = num_slots; | |||
| 4586 | ||||
| 4587 | ret = drm_dp_dpcd_write(mgr->aux, DP_PAYLOAD_ALLOCATE_SET0x1c0, payload_alloc, 3); | |||
| 4588 | if (ret != 3) { | |||
| 4589 | drm_dbg_kms(mgr->dev, "failed to write payload allocation %d\n", ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to write payload allocation %d\n" , ret); | |||
| 4590 | goto fail; | |||
| 4591 | } | |||
| 4592 | ||||
| 4593 | retry: | |||
| 4594 | ret = drm_dp_dpcd_readb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS0x2c0, &status); | |||
| 4595 | if (ret < 0) { | |||
| 4596 | drm_dbg_kms(mgr->dev, "failed to read payload table status %d\n", ret)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "failed to read payload table status %d\n" , ret); | |||
| 4597 | goto fail; | |||
| 4598 | } | |||
| 4599 | ||||
| 4600 | if (!(status & DP_PAYLOAD_TABLE_UPDATED(1 << 0))) { | |||
| 4601 | retries++; | |||
| 4602 | if (retries < 20) { | |||
| 4603 | usleep_range(10000, 20000); | |||
| 4604 | goto retry; | |||
| 4605 | } | |||
| 4606 | drm_dbg_kms(mgr->dev, "status not set after read payload table status %d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "status not set after read payload table status %d\n" , status) | |||
| 4607 | status)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "status not set after read payload table status %d\n" , status); | |||
| 4608 | ret = -EINVAL22; | |||
| 4609 | goto fail; | |||
| 4610 | } | |||
| 4611 | ret = 0; | |||
| 4612 | fail: | |||
| 4613 | return ret; | |||
| 4614 | } | |||
| 4615 | ||||
| 4616 | static int do_get_act_status(struct drm_dp_aux *aux) | |||
| 4617 | { | |||
| 4618 | int ret; | |||
| 4619 | u8 status; | |||
| 4620 | ||||
| 4621 | ret = drm_dp_dpcd_readb(aux, DP_PAYLOAD_TABLE_UPDATE_STATUS0x2c0, &status); | |||
| 4622 | if (ret < 0) | |||
| 4623 | return ret; | |||
| 4624 | ||||
| 4625 | return status; | |||
| 4626 | } | |||
| 4627 | ||||
| 4628 | /** | |||
| 4629 | * drm_dp_check_act_status() - Polls for ACT handled status. | |||
| 4630 | * @mgr: manager to use | |||
| 4631 | * | |||
| 4632 | * Tries waiting for the MST hub to finish updating it's payload table by | |||
| 4633 | * polling for the ACT handled bit for up to 3 seconds (yes-some hubs really | |||
| 4634 | * take that long). | |||
| 4635 | * | |||
| 4636 | * Returns: | |||
| 4637 | * 0 if the ACT was handled in time, negative error code on failure. | |||
| 4638 | */ | |||
| 4639 | int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr) | |||
| 4640 | { | |||
| 4641 | /* | |||
| 4642 | * There doesn't seem to be any recommended retry count or timeout in | |||
| 4643 | * the MST specification. Since some hubs have been observed to take | |||
| 4644 | * over 1 second to update their payload allocations under certain | |||
| 4645 | * conditions, we use a rather large timeout value. | |||
| 4646 | */ | |||
| 4647 | const int timeout_ms = 3000; | |||
| 4648 | int ret, status; | |||
| 4649 | ||||
| 4650 | ret = readx_poll_timeout(do_get_act_status, mgr->aux, status,({ struct timeval __end, __now, __timeout_tv; int __timed_out = 0; if (timeout_ms * 1000L) { microuptime(&__now); USEC_TO_TIMEVAL (timeout_ms * 1000L, &__timeout_tv); do { (&__end)-> tv_sec = (&__now)->tv_sec + (&__timeout_tv)->tv_sec ; (&__end)->tv_usec = (&__now)->tv_usec + (& __timeout_tv)->tv_usec; if ((&__end)->tv_usec >= 1000000) { (&__end)->tv_sec++; (&__end)->tv_usec -= 1000000; } } while (0); } for (;;) { (status) = (do_get_act_status )(mgr->aux); if (status & (1 << 1) || status < 0) break; if (timeout_ms * 1000L) { microuptime(&__now); if ((((&__end)->tv_sec == (&__now)->tv_sec) ? ( (&__end)->tv_usec <= (&__now)->tv_usec) : (( &__end)->tv_sec <= (&__now)->tv_sec))) { __timed_out = 1; break; } } if (200) (*delay_func)((200) / 2); } (__timed_out ) ? -60 : 0; }) | |||
| 4651 | status & DP_PAYLOAD_ACT_HANDLED || status < 0,({ struct timeval __end, __now, __timeout_tv; int __timed_out = 0; if (timeout_ms * 1000L) { microuptime(&__now); USEC_TO_TIMEVAL (timeout_ms * 1000L, &__timeout_tv); do { (&__end)-> tv_sec = (&__now)->tv_sec + (&__timeout_tv)->tv_sec ; (&__end)->tv_usec = (&__now)->tv_usec + (& __timeout_tv)->tv_usec; if ((&__end)->tv_usec >= 1000000) { (&__end)->tv_sec++; (&__end)->tv_usec -= 1000000; } } while (0); } for (;;) { (status) = (do_get_act_status )(mgr->aux); if (status & (1 << 1) || status < 0) break; if (timeout_ms * 1000L) { microuptime(&__now); if ((((&__end)->tv_sec == (&__now)->tv_sec) ? ( (&__end)->tv_usec <= (&__now)->tv_usec) : (( &__end)->tv_sec <= (&__now)->tv_sec))) { __timed_out = 1; break; } } if (200) (*delay_func)((200) / 2); } (__timed_out ) ? -60 : 0; }) | |||
| 4652 | 200, timeout_ms * USEC_PER_MSEC)({ struct timeval __end, __now, __timeout_tv; int __timed_out = 0; if (timeout_ms * 1000L) { microuptime(&__now); USEC_TO_TIMEVAL (timeout_ms * 1000L, &__timeout_tv); do { (&__end)-> tv_sec = (&__now)->tv_sec + (&__timeout_tv)->tv_sec ; (&__end)->tv_usec = (&__now)->tv_usec + (& __timeout_tv)->tv_usec; if ((&__end)->tv_usec >= 1000000) { (&__end)->tv_sec++; (&__end)->tv_usec -= 1000000; } } while (0); } for (;;) { (status) = (do_get_act_status )(mgr->aux); if (status & (1 << 1) || status < 0) break; if (timeout_ms * 1000L) { microuptime(&__now); if ((((&__end)->tv_sec == (&__now)->tv_sec) ? ( (&__end)->tv_usec <= (&__now)->tv_usec) : (( &__end)->tv_sec <= (&__now)->tv_sec))) { __timed_out = 1; break; } } if (200) (*delay_func)((200) / 2); } (__timed_out ) ? -60 : 0; }); | |||
| 4653 | if (ret < 0 && status >= 0) { | |||
| 4654 | drm_err(mgr->dev, "Failed to get ACT after %dms, last status: %02x\n",printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to get ACT after %dms, last status: %02x\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , timeout_ms , status) | |||
| 4655 | timeout_ms, status)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to get ACT after %dms, last status: %02x\n" , ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p->ps_pid, __func__ , timeout_ms , status); | |||
| 4656 | return -EINVAL22; | |||
| 4657 | } else if (status < 0) { | |||
| 4658 | /* | |||
| 4659 | * Failure here isn't unexpected - the hub may have | |||
| 4660 | * just been unplugged | |||
| 4661 | */ | |||
| 4662 | drm_dbg_kms(mgr->dev, "Failed to read payload table status: %d\n", status)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Failed to read payload table status: %d\n" , status); | |||
| 4663 | return status; | |||
| 4664 | } | |||
| 4665 | ||||
| 4666 | return 0; | |||
| 4667 | } | |||
| 4668 | EXPORT_SYMBOL(drm_dp_check_act_status); | |||
| 4669 | ||||
| 4670 | /** | |||
| 4671 | * drm_dp_calc_pbn_mode() - Calculate the PBN for a mode. | |||
| 4672 | * @clock: dot clock for the mode | |||
| 4673 | * @bpp: bpp for the mode. | |||
| 4674 | * @dsc: DSC mode. If true, bpp has units of 1/16 of a bit per pixel | |||
| 4675 | * | |||
| 4676 | * This uses the formula in the spec to calculate the PBN value for a mode. | |||
| 4677 | */ | |||
| 4678 | int drm_dp_calc_pbn_mode(int clock, int bpp, bool_Bool dsc) | |||
| 4679 | { | |||
| 4680 | /* | |||
| 4681 | * margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006 | |||
| 4682 | * The unit of 54/64Mbytes/sec is an arbitrary unit chosen based on | |||
| 4683 | * common multiplier to render an integer PBN for all link rate/lane | |||
| 4684 | * counts combinations | |||
| 4685 | * calculate | |||
| 4686 | * peak_kbps *= (1006/1000) | |||
| 4687 | * peak_kbps *= (64/54) | |||
| 4688 | * peak_kbps *= 8 convert to bytes | |||
| 4689 | * | |||
| 4690 | * If the bpp is in units of 1/16, further divide by 16. Put this | |||
| 4691 | * factor in the numerator rather than the denominator to avoid | |||
| 4692 | * integer overflow | |||
| 4693 | */ | |||
| 4694 | ||||
| 4695 | if (dsc) | |||
| 4696 | return DIV_ROUND_UP_ULL(mul_u32_u32(clock * (bpp / 16), 64 * 1006),(((mul_u32_u32(clock * (bpp / 16), 64 * 1006)) + ((8 * 54 * 1000 * 1000) - 1)) / (8 * 54 * 1000 * 1000)) | |||
| 4697 | 8 * 54 * 1000 * 1000)(((mul_u32_u32(clock * (bpp / 16), 64 * 1006)) + ((8 * 54 * 1000 * 1000) - 1)) / (8 * 54 * 1000 * 1000)); | |||
| 4698 | ||||
| 4699 | return DIV_ROUND_UP_ULL(mul_u32_u32(clock * bpp, 64 * 1006),(((mul_u32_u32(clock * bpp, 64 * 1006)) + ((8 * 54 * 1000 * 1000 ) - 1)) / (8 * 54 * 1000 * 1000)) | |||
| 4700 | 8 * 54 * 1000 * 1000)(((mul_u32_u32(clock * bpp, 64 * 1006)) + ((8 * 54 * 1000 * 1000 ) - 1)) / (8 * 54 * 1000 * 1000)); | |||
| 4701 | } | |||
| 4702 | EXPORT_SYMBOL(drm_dp_calc_pbn_mode); | |||
| 4703 | ||||
| 4704 | /* we want to kick the TX after we've ack the up/down IRQs. */ | |||
| 4705 | static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr *mgr) | |||
| 4706 | { | |||
| 4707 | queue_work(system_long_wq, &mgr->tx_work); | |||
| 4708 | } | |||
| 4709 | ||||
| 4710 | /* | |||
| 4711 | * Helper function for parsing DP device types into convenient strings | |||
| 4712 | * for use with dp_mst_topology | |||
| 4713 | */ | |||
| 4714 | static const char *pdt_to_string(u8 pdt) | |||
| 4715 | { | |||
| 4716 | switch (pdt) { | |||
| 4717 | case DP_PEER_DEVICE_NONE0x0: | |||
| 4718 | return "NONE"; | |||
| 4719 | case DP_PEER_DEVICE_SOURCE_OR_SST0x1: | |||
| 4720 | return "SOURCE OR SST"; | |||
| 4721 | case DP_PEER_DEVICE_MST_BRANCHING0x2: | |||
| 4722 | return "MST BRANCHING"; | |||
| 4723 | case DP_PEER_DEVICE_SST_SINK0x3: | |||
| 4724 | return "SST SINK"; | |||
| 4725 | case DP_PEER_DEVICE_DP_LEGACY_CONV0x4: | |||
| 4726 | return "DP LEGACY CONV"; | |||
| 4727 | default: | |||
| 4728 | return "ERR"; | |||
| 4729 | } | |||
| 4730 | } | |||
| 4731 | ||||
| 4732 | static void drm_dp_mst_dump_mstb(struct seq_file *m, | |||
| 4733 | struct drm_dp_mst_branch *mstb) | |||
| 4734 | { | |||
| 4735 | struct drm_dp_mst_port *port; | |||
| 4736 | int tabs = mstb->lct; | |||
| 4737 | char prefix[10]; | |||
| 4738 | int i; | |||
| 4739 | ||||
| 4740 | for (i = 0; i < tabs; i++) | |||
| 4741 | prefix[i] = '\t'; | |||
| 4742 | prefix[i] = '\0'; | |||
| 4743 | ||||
| 4744 | seq_printf(m, "%smstb - [%p]: num_ports: %d\n", prefix, mstb, mstb->num_ports); | |||
| 4745 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 4746 | seq_printf(m, "%sport %d - [%p] (%s - %s): ddps: %d, ldps: %d, sdp: %d/%d, fec: %s, conn: %p\n", | |||
| 4747 | prefix, | |||
| 4748 | port->port_num, | |||
| 4749 | port, | |||
| 4750 | port->input ? "input" : "output", | |||
| 4751 | pdt_to_string(port->pdt), | |||
| 4752 | port->ddps, | |||
| 4753 | port->ldps, | |||
| 4754 | port->num_sdp_streams, | |||
| 4755 | port->num_sdp_stream_sinks, | |||
| 4756 | port->fec_capable ? "true" : "false", | |||
| 4757 | port->connector); | |||
| 4758 | if (port->mstb) | |||
| 4759 | drm_dp_mst_dump_mstb(m, port->mstb); | |||
| 4760 | } | |||
| 4761 | } | |||
| 4762 | ||||
| 4763 | #define DP_PAYLOAD_TABLE_SIZE64 64 | |||
| 4764 | ||||
| 4765 | static bool_Bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, | |||
| 4766 | char *buf) | |||
| 4767 | { | |||
| 4768 | int i; | |||
| 4769 | ||||
| 4770 | for (i = 0; i < DP_PAYLOAD_TABLE_SIZE64; i += 16) { | |||
| 4771 | if (drm_dp_dpcd_read(mgr->aux, | |||
| 4772 | DP_PAYLOAD_TABLE_UPDATE_STATUS0x2c0 + i, | |||
| 4773 | &buf[i], 16) != 16) | |||
| 4774 | return false0; | |||
| 4775 | } | |||
| 4776 | return true1; | |||
| 4777 | } | |||
| 4778 | ||||
| 4779 | static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr, | |||
| 4780 | struct drm_dp_mst_port *port, char *name, | |||
| 4781 | int namelen) | |||
| 4782 | { | |||
| 4783 | struct edid *mst_edid; | |||
| 4784 | ||||
| 4785 | mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port); | |||
| 4786 | drm_edid_get_monitor_name(mst_edid, name, namelen); | |||
| 4787 | kfree(mst_edid); | |||
| 4788 | } | |||
| 4789 | ||||
| 4790 | /** | |||
| 4791 | * drm_dp_mst_dump_topology(): dump topology to seq file. | |||
| 4792 | * @m: seq_file to dump output to | |||
| 4793 | * @mgr: manager to dump current topology for. | |||
| 4794 | * | |||
| 4795 | * helper to dump MST topology to a seq file for debugfs. | |||
| 4796 | */ | |||
| 4797 | void drm_dp_mst_dump_topology(struct seq_file *m, | |||
| 4798 | struct drm_dp_mst_topology_mgr *mgr) | |||
| 4799 | { | |||
| 4800 | struct drm_dp_mst_topology_state *state; | |||
| 4801 | struct drm_dp_mst_atomic_payload *payload; | |||
| 4802 | int i, ret; | |||
| 4803 | ||||
| 4804 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 4805 | if (mgr->mst_primary) | |||
| 4806 | drm_dp_mst_dump_mstb(m, mgr->mst_primary); | |||
| 4807 | ||||
| 4808 | /* dump VCPIs */ | |||
| 4809 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 4810 | ||||
| 4811 | ret = drm_modeset_lock_single_interruptible(&mgr->base.lock); | |||
| 4812 | if (ret < 0) | |||
| 4813 | return; | |||
| 4814 | ||||
| 4815 | state = to_drm_dp_mst_topology_state(mgr->base.state); | |||
| 4816 | seq_printf(m, "\n*** Atomic state info ***\n"); | |||
| 4817 | seq_printf(m, "payload_mask: %x, max_payloads: %d, start_slot: %u, pbn_div: %d\n", | |||
| 4818 | state->payload_mask, mgr->max_payloads, state->start_slot, state->pbn_div); | |||
| 4819 | ||||
| 4820 | seq_printf(m, "\n| idx | port | vcpi | slots | pbn | dsc | sink name |\n"); | |||
| 4821 | for (i = 0; i < mgr->max_payloads; i++) { | |||
| 4822 | list_for_each_entry(payload, &state->payloads, next)for (payload = ({ const __typeof( ((__typeof(*payload) *)0)-> next ) *__mptr = ((&state->payloads)->next); (__typeof (*payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(* payload), next) );}); &payload->next != (&state-> payloads); payload = ({ const __typeof( ((__typeof(*payload) * )0)->next ) *__mptr = (payload->next.next); (__typeof(* payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(*payload ), next) );})) { | |||
| 4823 | char name[14]; | |||
| 4824 | ||||
| 4825 | if (payload->vcpi != i || payload->delete) | |||
| 4826 | continue; | |||
| 4827 | ||||
| 4828 | fetch_monitor_name(mgr, payload->port, name, sizeof(name)); | |||
| 4829 | seq_printf(m, " %5d %6d %6d %02d - %02d %5d %5s %19s\n", | |||
| 4830 | i, | |||
| 4831 | payload->port->port_num, | |||
| 4832 | payload->vcpi, | |||
| 4833 | payload->vc_start_slot, | |||
| 4834 | payload->vc_start_slot + payload->time_slots - 1, | |||
| 4835 | payload->pbn, | |||
| 4836 | payload->dsc_enabled ? "Y" : "N", | |||
| 4837 | (*name != 0) ? name : "Unknown"); | |||
| 4838 | } | |||
| 4839 | } | |||
| 4840 | ||||
| 4841 | seq_printf(m, "\n*** DPCD Info ***\n"); | |||
| 4842 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 4843 | if (mgr->mst_primary) { | |||
| 4844 | u8 buf[DP_PAYLOAD_TABLE_SIZE64]; | |||
| 4845 | int ret; | |||
| 4846 | ||||
| 4847 | if (drm_dp_read_dpcd_caps(mgr->aux, buf) < 0) { | |||
| 4848 | seq_printf(m, "dpcd read failed\n"); | |||
| 4849 | goto out; | |||
| 4850 | } | |||
| 4851 | seq_printf(m, "dpcd: %*ph\n", DP_RECEIVER_CAP_SIZE0xf, buf); | |||
| 4852 | ||||
| 4853 | ret = drm_dp_dpcd_read(mgr->aux, DP_FAUX_CAP0x020, buf, 2); | |||
| 4854 | if (ret != 2) { | |||
| 4855 | seq_printf(m, "faux/mst read failed\n"); | |||
| 4856 | goto out; | |||
| 4857 | } | |||
| 4858 | seq_printf(m, "faux/mst: %*ph\n", 2, buf); | |||
| 4859 | ||||
| 4860 | ret = drm_dp_dpcd_read(mgr->aux, DP_MSTM_CTRL0x111, buf, 1); | |||
| 4861 | if (ret != 1) { | |||
| 4862 | seq_printf(m, "mst ctrl read failed\n"); | |||
| 4863 | goto out; | |||
| 4864 | } | |||
| 4865 | seq_printf(m, "mst ctrl: %*ph\n", 1, buf); | |||
| 4866 | ||||
| 4867 | /* dump the standard OUI branch header */ | |||
| 4868 | ret = drm_dp_dpcd_read(mgr->aux, DP_BRANCH_OUI0x500, buf, DP_BRANCH_OUI_HEADER_SIZE0xc); | |||
| 4869 | if (ret != DP_BRANCH_OUI_HEADER_SIZE0xc) { | |||
| 4870 | seq_printf(m, "branch oui read failed\n"); | |||
| 4871 | goto out; | |||
| 4872 | } | |||
| 4873 | seq_printf(m, "branch oui: %*phN devid: ", 3, buf); | |||
| 4874 | ||||
| 4875 | for (i = 0x3; i < 0x8 && buf[i]; i++) | |||
| 4876 | seq_printf(m, "%c", buf[i]); | |||
| 4877 | seq_printf(m, " revision: hw: %x.%x sw: %x.%x\n", | |||
| 4878 | buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]); | |||
| 4879 | if (dump_dp_payload_table(mgr, buf)) | |||
| 4880 | seq_printf(m, "payload table: %*ph\n", DP_PAYLOAD_TABLE_SIZE64, buf); | |||
| 4881 | } | |||
| 4882 | ||||
| 4883 | out: | |||
| 4884 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 4885 | drm_modeset_unlock(&mgr->base.lock); | |||
| 4886 | } | |||
| 4887 | EXPORT_SYMBOL(drm_dp_mst_dump_topology); | |||
| 4888 | ||||
| 4889 | static void drm_dp_tx_work(struct work_struct *work) | |||
| 4890 | { | |||
| 4891 | struct drm_dp_mst_topology_mgr *mgr = container_of(work, struct drm_dp_mst_topology_mgr, tx_work)({ const __typeof( ((struct drm_dp_mst_topology_mgr *)0)-> tx_work ) *__mptr = (work); (struct drm_dp_mst_topology_mgr * )( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_mgr , tx_work) );}); | |||
| 4892 | ||||
| 4893 | mutex_lock(&mgr->qlock)rw_enter_write(&mgr->qlock); | |||
| 4894 | if (!list_empty(&mgr->tx_msg_downq)) | |||
| 4895 | process_single_down_tx_qlock(mgr); | |||
| 4896 | mutex_unlock(&mgr->qlock)rw_exit_write(&mgr->qlock); | |||
| 4897 | } | |||
| 4898 | ||||
| 4899 | static inline void | |||
| 4900 | drm_dp_delayed_destroy_port(struct drm_dp_mst_port *port) | |||
| 4901 | { | |||
| 4902 | drm_dp_port_set_pdt(port, DP_PEER_DEVICE_NONE0x0, port->mcs); | |||
| 4903 | ||||
| 4904 | if (port->connector) { | |||
| 4905 | drm_connector_unregister(port->connector); | |||
| 4906 | drm_connector_put(port->connector); | |||
| 4907 | } | |||
| 4908 | ||||
| 4909 | drm_dp_mst_put_port_malloc(port); | |||
| 4910 | } | |||
| 4911 | ||||
| 4912 | static inline void | |||
| 4913 | drm_dp_delayed_destroy_mstb(struct drm_dp_mst_branch *mstb) | |||
| 4914 | { | |||
| 4915 | struct drm_dp_mst_topology_mgr *mgr = mstb->mgr; | |||
| 4916 | struct drm_dp_mst_port *port, *port_tmp; | |||
| 4917 | struct drm_dp_sideband_msg_tx *txmsg, *txmsg_tmp; | |||
| 4918 | bool_Bool wake_tx = false0; | |||
| 4919 | ||||
| 4920 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 4921 | list_for_each_entry_safe(port, port_tmp, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}), port_tmp = ({ const __typeof( ((__typeof(*port) *)0)-> next ) *__mptr = (port->next.next); (__typeof(*port) *)( ( char *)__mptr - __builtin_offsetof(__typeof(*port), next) );} ); &port->next != (&mstb->ports); port = port_tmp , port_tmp = ({ const __typeof( ((__typeof(*port_tmp) *)0)-> next ) *__mptr = (port_tmp->next.next); (__typeof(*port_tmp ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port_tmp) , next) );})) { | |||
| 4922 | list_del(&port->next); | |||
| 4923 | drm_dp_mst_topology_put_port(port); | |||
| 4924 | } | |||
| 4925 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 4926 | ||||
| 4927 | /* drop any tx slot msg */ | |||
| 4928 | mutex_lock(&mstb->mgr->qlock)rw_enter_write(&mstb->mgr->qlock); | |||
| 4929 | list_for_each_entry_safe(txmsg, txmsg_tmp, &mgr->tx_msg_downq, next)for (txmsg = ({ const __typeof( ((__typeof(*txmsg) *)0)->next ) *__mptr = ((&mgr->tx_msg_downq)->next); (__typeof (*txmsg) *)( (char *)__mptr - __builtin_offsetof(__typeof(*txmsg ), next) );}), txmsg_tmp = ({ const __typeof( ((__typeof(*txmsg ) *)0)->next ) *__mptr = (txmsg->next.next); (__typeof( *txmsg) *)( (char *)__mptr - __builtin_offsetof(__typeof(*txmsg ), next) );}); &txmsg->next != (&mgr->tx_msg_downq ); txmsg = txmsg_tmp, txmsg_tmp = ({ const __typeof( ((__typeof (*txmsg_tmp) *)0)->next ) *__mptr = (txmsg_tmp->next.next ); (__typeof(*txmsg_tmp) *)( (char *)__mptr - __builtin_offsetof (__typeof(*txmsg_tmp), next) );})) { | |||
| 4930 | if (txmsg->dst != mstb) | |||
| 4931 | continue; | |||
| 4932 | ||||
| 4933 | txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT4; | |||
| 4934 | list_del(&txmsg->next); | |||
| 4935 | wake_tx = true1; | |||
| 4936 | } | |||
| 4937 | mutex_unlock(&mstb->mgr->qlock)rw_exit_write(&mstb->mgr->qlock); | |||
| 4938 | ||||
| 4939 | if (wake_tx) | |||
| 4940 | wake_up_all(&mstb->mgr->tx_waitq)wake_up(&mstb->mgr->tx_waitq); | |||
| 4941 | ||||
| 4942 | drm_dp_mst_put_mstb_malloc(mstb); | |||
| 4943 | } | |||
| 4944 | ||||
| 4945 | static void drm_dp_delayed_destroy_work(struct work_struct *work) | |||
| 4946 | { | |||
| 4947 | struct drm_dp_mst_topology_mgr *mgr = | |||
| 4948 | container_of(work, struct drm_dp_mst_topology_mgr,({ const __typeof( ((struct drm_dp_mst_topology_mgr *)0)-> delayed_destroy_work ) *__mptr = (work); (struct drm_dp_mst_topology_mgr *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_mgr , delayed_destroy_work) );}) | |||
| 4949 | delayed_destroy_work)({ const __typeof( ((struct drm_dp_mst_topology_mgr *)0)-> delayed_destroy_work ) *__mptr = (work); (struct drm_dp_mst_topology_mgr *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_mgr , delayed_destroy_work) );}); | |||
| 4950 | bool_Bool send_hotplug = false0, go_again; | |||
| 4951 | ||||
| 4952 | /* | |||
| 4953 | * Not a regular list traverse as we have to drop the destroy | |||
| 4954 | * connector lock before destroying the mstb/port, to avoid AB->BA | |||
| 4955 | * ordering between this lock and the config mutex. | |||
| 4956 | */ | |||
| 4957 | do { | |||
| 4958 | go_again = false0; | |||
| 4959 | ||||
| 4960 | for (;;) { | |||
| 4961 | struct drm_dp_mst_branch *mstb; | |||
| 4962 | ||||
| 4963 | mutex_lock(&mgr->delayed_destroy_lock)rw_enter_write(&mgr->delayed_destroy_lock); | |||
| 4964 | mstb = list_first_entry_or_null(&mgr->destroy_branch_device_list,(list_empty(&mgr->destroy_branch_device_list) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_mst_branch *)0)-> destroy_next ) *__mptr = ((&mgr->destroy_branch_device_list )->next); (struct drm_dp_mst_branch *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_branch, destroy_next) );})) | |||
| 4965 | struct drm_dp_mst_branch,(list_empty(&mgr->destroy_branch_device_list) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_mst_branch *)0)-> destroy_next ) *__mptr = ((&mgr->destroy_branch_device_list )->next); (struct drm_dp_mst_branch *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_branch, destroy_next) );})) | |||
| 4966 | destroy_next)(list_empty(&mgr->destroy_branch_device_list) ? ((void *)0) : ({ const __typeof( ((struct drm_dp_mst_branch *)0)-> destroy_next ) *__mptr = ((&mgr->destroy_branch_device_list )->next); (struct drm_dp_mst_branch *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_branch, destroy_next) );})); | |||
| 4967 | if (mstb) | |||
| 4968 | list_del(&mstb->destroy_next); | |||
| 4969 | mutex_unlock(&mgr->delayed_destroy_lock)rw_exit_write(&mgr->delayed_destroy_lock); | |||
| 4970 | ||||
| 4971 | if (!mstb) | |||
| 4972 | break; | |||
| 4973 | ||||
| 4974 | drm_dp_delayed_destroy_mstb(mstb); | |||
| 4975 | go_again = true1; | |||
| 4976 | } | |||
| 4977 | ||||
| 4978 | for (;;) { | |||
| 4979 | struct drm_dp_mst_port *port; | |||
| 4980 | ||||
| 4981 | mutex_lock(&mgr->delayed_destroy_lock)rw_enter_write(&mgr->delayed_destroy_lock); | |||
| 4982 | port = list_first_entry_or_null(&mgr->destroy_port_list,(list_empty(&mgr->destroy_port_list) ? ((void *)0) : ( { const __typeof( ((struct drm_dp_mst_port *)0)->next ) *__mptr = ((&mgr->destroy_port_list)->next); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_port , next) );})) | |||
| 4983 | struct drm_dp_mst_port,(list_empty(&mgr->destroy_port_list) ? ((void *)0) : ( { const __typeof( ((struct drm_dp_mst_port *)0)->next ) *__mptr = ((&mgr->destroy_port_list)->next); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_port , next) );})) | |||
| 4984 | next)(list_empty(&mgr->destroy_port_list) ? ((void *)0) : ( { const __typeof( ((struct drm_dp_mst_port *)0)->next ) *__mptr = ((&mgr->destroy_port_list)->next); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_port , next) );})); | |||
| 4985 | if (port) | |||
| 4986 | list_del(&port->next); | |||
| 4987 | mutex_unlock(&mgr->delayed_destroy_lock)rw_exit_write(&mgr->delayed_destroy_lock); | |||
| 4988 | ||||
| 4989 | if (!port) | |||
| 4990 | break; | |||
| 4991 | ||||
| 4992 | drm_dp_delayed_destroy_port(port); | |||
| 4993 | send_hotplug = true1; | |||
| 4994 | go_again = true1; | |||
| 4995 | } | |||
| 4996 | } while (go_again); | |||
| 4997 | ||||
| 4998 | if (send_hotplug) | |||
| 4999 | drm_kms_helper_hotplug_event(mgr->dev); | |||
| 5000 | } | |||
| 5001 | ||||
| 5002 | static struct drm_private_state * | |||
| 5003 | drm_dp_mst_duplicate_state(struct drm_private_obj *obj) | |||
| 5004 | { | |||
| 5005 | struct drm_dp_mst_topology_state *state, *old_state = | |||
| 5006 | to_dp_mst_topology_state(obj->state)({ const __typeof( ((struct drm_dp_mst_topology_state *)0)-> base ) *__mptr = (obj->state); (struct drm_dp_mst_topology_state *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_state , base) );}); | |||
| 5007 | struct drm_dp_mst_atomic_payload *pos, *payload; | |||
| 5008 | ||||
| 5009 | state = kmemdup(old_state, sizeof(*state), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 5010 | if (!state) | |||
| 5011 | return NULL((void *)0); | |||
| 5012 | ||||
| 5013 | __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base); | |||
| 5014 | ||||
| 5015 | INIT_LIST_HEAD(&state->payloads); | |||
| 5016 | state->commit_deps = NULL((void *)0); | |||
| 5017 | state->num_commit_deps = 0; | |||
| 5018 | state->pending_crtc_mask = 0; | |||
| 5019 | ||||
| 5020 | list_for_each_entry(pos, &old_state->payloads, next)for (pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) *__mptr = ((&old_state->payloads)->next); (__typeof (*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos) , next) );}); &pos->next != (&old_state->payloads ); pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) * __mptr = (pos->next.next); (__typeof(*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos), next) );})) { | |||
| 5021 | /* Prune leftover freed timeslot allocations */ | |||
| 5022 | if (pos->delete) | |||
| 5023 | continue; | |||
| 5024 | ||||
| 5025 | payload = kmemdup(pos, sizeof(*payload), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 5026 | if (!payload) | |||
| 5027 | goto fail; | |||
| 5028 | ||||
| 5029 | drm_dp_mst_get_port_malloc(payload->port); | |||
| 5030 | list_add(&payload->next, &state->payloads); | |||
| 5031 | } | |||
| 5032 | ||||
| 5033 | return &state->base; | |||
| 5034 | ||||
| 5035 | fail: | |||
| 5036 | list_for_each_entry_safe(pos, payload, &state->payloads, next)for (pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) *__mptr = ((&state->payloads)->next); (__typeof(*pos ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos), next ) );}), payload = ({ const __typeof( ((__typeof(*pos) *)0)-> next ) *__mptr = (pos->next.next); (__typeof(*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos), next) );}); & pos->next != (&state->payloads); pos = payload, payload = ({ const __typeof( ((__typeof(*payload) *)0)->next ) *__mptr = (payload->next.next); (__typeof(*payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(*payload), next) );})) { | |||
| 5037 | drm_dp_mst_put_port_malloc(pos->port); | |||
| 5038 | kfree(pos); | |||
| 5039 | } | |||
| 5040 | kfree(state); | |||
| 5041 | ||||
| 5042 | return NULL((void *)0); | |||
| 5043 | } | |||
| 5044 | ||||
| 5045 | static void drm_dp_mst_destroy_state(struct drm_private_obj *obj, | |||
| 5046 | struct drm_private_state *state) | |||
| 5047 | { | |||
| 5048 | struct drm_dp_mst_topology_state *mst_state = | |||
| 5049 | to_dp_mst_topology_state(state)({ const __typeof( ((struct drm_dp_mst_topology_state *)0)-> base ) *__mptr = (state); (struct drm_dp_mst_topology_state * )( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_state , base) );}); | |||
| 5050 | struct drm_dp_mst_atomic_payload *pos, *tmp; | |||
| 5051 | int i; | |||
| 5052 | ||||
| 5053 | list_for_each_entry_safe(pos, tmp, &mst_state->payloads, next)for (pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) *__mptr = ((&mst_state->payloads)->next); (__typeof (*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos) , next) );}), tmp = ({ const __typeof( ((__typeof(*pos) *)0)-> next ) *__mptr = (pos->next.next); (__typeof(*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos), next) );}); & pos->next != (&mst_state->payloads); pos = tmp, tmp = ({ const __typeof( ((__typeof(*tmp) *)0)->next ) *__mptr = (tmp->next.next); (__typeof(*tmp) *)( (char *)__mptr - __builtin_offsetof (__typeof(*tmp), next) );})) { | |||
| 5054 | /* We only keep references to ports with active payloads */ | |||
| 5055 | if (!pos->delete) | |||
| 5056 | drm_dp_mst_put_port_malloc(pos->port); | |||
| 5057 | kfree(pos); | |||
| 5058 | } | |||
| 5059 | ||||
| 5060 | for (i = 0; i < mst_state->num_commit_deps; i++) | |||
| 5061 | drm_crtc_commit_put(mst_state->commit_deps[i]); | |||
| 5062 | ||||
| 5063 | kfree(mst_state->commit_deps); | |||
| 5064 | kfree(mst_state); | |||
| 5065 | } | |||
| 5066 | ||||
| 5067 | static bool_Bool drm_dp_mst_port_downstream_of_branch(struct drm_dp_mst_port *port, | |||
| 5068 | struct drm_dp_mst_branch *branch) | |||
| 5069 | { | |||
| 5070 | while (port->parent) { | |||
| 5071 | if (port->parent == branch) | |||
| 5072 | return true1; | |||
| 5073 | ||||
| 5074 | if (port->parent->port_parent) | |||
| 5075 | port = port->parent->port_parent; | |||
| 5076 | else | |||
| 5077 | break; | |||
| 5078 | } | |||
| 5079 | return false0; | |||
| 5080 | } | |||
| 5081 | ||||
| 5082 | static int | |||
| 5083 | drm_dp_mst_atomic_check_port_bw_limit(struct drm_dp_mst_port *port, | |||
| 5084 | struct drm_dp_mst_topology_state *state); | |||
| 5085 | ||||
| 5086 | static int | |||
| 5087 | drm_dp_mst_atomic_check_mstb_bw_limit(struct drm_dp_mst_branch *mstb, | |||
| 5088 | struct drm_dp_mst_topology_state *state) | |||
| 5089 | { | |||
| 5090 | struct drm_dp_mst_atomic_payload *payload; | |||
| 5091 | struct drm_dp_mst_port *port; | |||
| 5092 | int pbn_used = 0, ret; | |||
| 5093 | bool_Bool found = false0; | |||
| 5094 | ||||
| 5095 | /* Check that we have at least one port in our state that's downstream | |||
| 5096 | * of this branch, otherwise we can skip this branch | |||
| 5097 | */ | |||
| 5098 | list_for_each_entry(payload, &state->payloads, next)for (payload = ({ const __typeof( ((__typeof(*payload) *)0)-> next ) *__mptr = ((&state->payloads)->next); (__typeof (*payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(* payload), next) );}); &payload->next != (&state-> payloads); payload = ({ const __typeof( ((__typeof(*payload) * )0)->next ) *__mptr = (payload->next.next); (__typeof(* payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(*payload ), next) );})) { | |||
| 5099 | if (!payload->pbn || | |||
| 5100 | !drm_dp_mst_port_downstream_of_branch(payload->port, mstb)) | |||
| 5101 | continue; | |||
| 5102 | ||||
| 5103 | found = true1; | |||
| 5104 | break; | |||
| 5105 | } | |||
| 5106 | if (!found) | |||
| 5107 | return 0; | |||
| 5108 | ||||
| 5109 | if (mstb->port_parent) | |||
| 5110 | drm_dbg_atomic(mstb->mgr->dev,__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] Checking bandwidth limits on [MSTB:%p]\n" , mstb->port_parent->parent, mstb->port_parent, mstb ) | |||
| 5111 | "[MSTB:%p] [MST PORT:%p] Checking bandwidth limits on [MSTB:%p]\n",__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] Checking bandwidth limits on [MSTB:%p]\n" , mstb->port_parent->parent, mstb->port_parent, mstb ) | |||
| 5112 | mstb->port_parent->parent, mstb->port_parent, mstb)__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] Checking bandwidth limits on [MSTB:%p]\n" , mstb->port_parent->parent, mstb->port_parent, mstb ); | |||
| 5113 | else | |||
| 5114 | drm_dbg_atomic(mstb->mgr->dev, "[MSTB:%p] Checking bandwidth limits\n", mstb)__drm_dev_dbg(((void *)0), (mstb->mgr->dev) ? (mstb-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] Checking bandwidth limits\n" , mstb); | |||
| 5115 | ||||
| 5116 | list_for_each_entry(port, &mstb->ports, next)for (port = ({ const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = ((&mstb->ports)->next); (__typeof(*port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*port), next ) );}); &port->next != (&mstb->ports); port = ( { const __typeof( ((__typeof(*port) *)0)->next ) *__mptr = (port->next.next); (__typeof(*port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*port), next) );})) { | |||
| 5117 | ret = drm_dp_mst_atomic_check_port_bw_limit(port, state); | |||
| 5118 | if (ret < 0) | |||
| 5119 | return ret; | |||
| 5120 | ||||
| 5121 | pbn_used += ret; | |||
| 5122 | } | |||
| 5123 | ||||
| 5124 | return pbn_used; | |||
| 5125 | } | |||
| 5126 | ||||
| 5127 | static int | |||
| 5128 | drm_dp_mst_atomic_check_port_bw_limit(struct drm_dp_mst_port *port, | |||
| 5129 | struct drm_dp_mst_topology_state *state) | |||
| 5130 | { | |||
| 5131 | struct drm_dp_mst_atomic_payload *payload; | |||
| 5132 | int pbn_used = 0; | |||
| 5133 | ||||
| 5134 | if (port->pdt == DP_PEER_DEVICE_NONE0x0) | |||
| 5135 | return 0; | |||
| 5136 | ||||
| 5137 | if (drm_dp_mst_is_end_device(port->pdt, port->mcs)) { | |||
| 5138 | payload = drm_atomic_get_mst_payload_state(state, port); | |||
| 5139 | if (!payload) | |||
| 5140 | return 0; | |||
| 5141 | ||||
| 5142 | /* | |||
| 5143 | * This could happen if the sink deasserted its HPD line, but | |||
| 5144 | * the branch device still reports it as attached (PDT != NONE). | |||
| 5145 | */ | |||
| 5146 | if (!port->full_pbn) { | |||
| 5147 | drm_dbg_atomic(port->mgr->dev,__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] no BW available for the port\n" , port->parent, port) | |||
| 5148 | "[MSTB:%p] [MST PORT:%p] no BW available for the port\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] no BW available for the port\n" , port->parent, port) | |||
| 5149 | port->parent, port)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] no BW available for the port\n" , port->parent, port); | |||
| 5150 | return -EINVAL22; | |||
| 5151 | } | |||
| 5152 | ||||
| 5153 | pbn_used = payload->pbn; | |||
| 5154 | } else { | |||
| 5155 | pbn_used = drm_dp_mst_atomic_check_mstb_bw_limit(port->mstb, | |||
| 5156 | state); | |||
| 5157 | if (pbn_used <= 0) | |||
| 5158 | return pbn_used; | |||
| 5159 | } | |||
| 5160 | ||||
| 5161 | if (pbn_used > port->full_pbn) { | |||
| 5162 | drm_dbg_atomic(port->mgr->dev,__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] required PBN of %d exceeds port limit of %d\n" , port->parent, port, pbn_used, port->full_pbn) | |||
| 5163 | "[MSTB:%p] [MST PORT:%p] required PBN of %d exceeds port limit of %d\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] required PBN of %d exceeds port limit of %d\n" , port->parent, port, pbn_used, port->full_pbn) | |||
| 5164 | port->parent, port, pbn_used, port->full_pbn)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] required PBN of %d exceeds port limit of %d\n" , port->parent, port, pbn_used, port->full_pbn); | |||
| 5165 | return -ENOSPC28; | |||
| 5166 | } | |||
| 5167 | ||||
| 5168 | drm_dbg_atomic(port->mgr->dev, "[MSTB:%p] [MST PORT:%p] uses %d out of %d PBN\n",__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] uses %d out of %d PBN\n" , port->parent, port, pbn_used, port->full_pbn) | |||
| 5169 | port->parent, port, pbn_used, port->full_pbn)__drm_dev_dbg(((void *)0), (port->mgr->dev) ? (port-> mgr->dev)->dev : ((void *)0), DRM_UT_ATOMIC, "[MSTB:%p] [MST PORT:%p] uses %d out of %d PBN\n" , port->parent, port, pbn_used, port->full_pbn); | |||
| 5170 | ||||
| 5171 | return pbn_used; | |||
| 5172 | } | |||
| 5173 | ||||
| 5174 | static inline int | |||
| 5175 | drm_dp_mst_atomic_check_payload_alloc_limits(struct drm_dp_mst_topology_mgr *mgr, | |||
| 5176 | struct drm_dp_mst_topology_state *mst_state) | |||
| 5177 | { | |||
| 5178 | struct drm_dp_mst_atomic_payload *payload; | |||
| 5179 | int avail_slots = mst_state->total_avail_slots, payload_count = 0; | |||
| 5180 | ||||
| 5181 | list_for_each_entry(payload, &mst_state->payloads, next)for (payload = ({ const __typeof( ((__typeof(*payload) *)0)-> next ) *__mptr = ((&mst_state->payloads)->next); (__typeof (*payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(* payload), next) );}); &payload->next != (&mst_state ->payloads); payload = ({ const __typeof( ((__typeof(*payload ) *)0)->next ) *__mptr = (payload->next.next); (__typeof (*payload) *)( (char *)__mptr - __builtin_offsetof(__typeof(* payload), next) );})) { | |||
| 5182 | /* Releasing payloads is always OK-even if the port is gone */ | |||
| 5183 | if (payload->delete) { | |||
| 5184 | drm_dbg_atomic(mgr->dev, "[MST PORT:%p] releases all time slots\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] releases all time slots\n" , payload->port) | |||
| 5185 | payload->port)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] releases all time slots\n" , payload->port); | |||
| 5186 | continue; | |||
| 5187 | } | |||
| 5188 | ||||
| 5189 | drm_dbg_atomic(mgr->dev, "[MST PORT:%p] requires %d time slots\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] requires %d time slots\n" , payload->port, payload->time_slots) | |||
| 5190 | payload->port, payload->time_slots)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] requires %d time slots\n" , payload->port, payload->time_slots); | |||
| 5191 | ||||
| 5192 | avail_slots -= payload->time_slots; | |||
| 5193 | if (avail_slots < 0) { | |||
| 5194 | drm_dbg_atomic(mgr->dev,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] not enough time slots in mst state %p (avail=%d)\n" , payload->port, mst_state, avail_slots + payload->time_slots ) | |||
| 5195 | "[MST PORT:%p] not enough time slots in mst state %p (avail=%d)\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] not enough time slots in mst state %p (avail=%d)\n" , payload->port, mst_state, avail_slots + payload->time_slots ) | |||
| 5196 | payload->port, mst_state, avail_slots + payload->time_slots)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] not enough time slots in mst state %p (avail=%d)\n" , payload->port, mst_state, avail_slots + payload->time_slots ); | |||
| 5197 | return -ENOSPC28; | |||
| 5198 | } | |||
| 5199 | ||||
| 5200 | if (++payload_count > mgr->max_payloads) { | |||
| 5201 | drm_dbg_atomic(mgr->dev,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] state %p has too many payloads (max=%d)\n" , mgr, mst_state, mgr->max_payloads) | |||
| 5202 | "[MST MGR:%p] state %p has too many payloads (max=%d)\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] state %p has too many payloads (max=%d)\n" , mgr, mst_state, mgr->max_payloads) | |||
| 5203 | mgr, mst_state, mgr->max_payloads)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] state %p has too many payloads (max=%d)\n" , mgr, mst_state, mgr->max_payloads); | |||
| 5204 | return -EINVAL22; | |||
| 5205 | } | |||
| 5206 | ||||
| 5207 | /* Assign a VCPI */ | |||
| 5208 | if (!payload->vcpi) { | |||
| 5209 | payload->vcpi = ffz(mst_state->payload_mask)__builtin_ctzl(~(mst_state->payload_mask)) + 1; | |||
| 5210 | drm_dbg_atomic(mgr->dev, "[MST PORT:%p] assigned VCPI #%d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] assigned VCPI #%d\n" , payload->port, payload->vcpi) | |||
| 5211 | payload->port, payload->vcpi)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] assigned VCPI #%d\n" , payload->port, payload->vcpi); | |||
| 5212 | mst_state->payload_mask |= BIT(payload->vcpi - 1)(1UL << (payload->vcpi - 1)); | |||
| 5213 | } | |||
| 5214 | } | |||
| 5215 | ||||
| 5216 | if (!payload_count) | |||
| 5217 | mst_state->pbn_div = 0; | |||
| 5218 | ||||
| 5219 | drm_dbg_atomic(mgr->dev, "[MST MGR:%p] mst state %p TU pbn_div=%d avail=%d used=%d\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] mst state %p TU pbn_div=%d avail=%d used=%d\n" , mgr, mst_state, mst_state->pbn_div, avail_slots, mst_state ->total_avail_slots - avail_slots) | |||
| 5220 | mgr, mst_state, mst_state->pbn_div, avail_slots,__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] mst state %p TU pbn_div=%d avail=%d used=%d\n" , mgr, mst_state, mst_state->pbn_div, avail_slots, mst_state ->total_avail_slots - avail_slots) | |||
| 5221 | mst_state->total_avail_slots - avail_slots)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] mst state %p TU pbn_div=%d avail=%d used=%d\n" , mgr, mst_state, mst_state->pbn_div, avail_slots, mst_state ->total_avail_slots - avail_slots); | |||
| 5222 | ||||
| 5223 | return 0; | |||
| 5224 | } | |||
| 5225 | ||||
| 5226 | /** | |||
| 5227 | * drm_dp_mst_add_affected_dsc_crtcs | |||
| 5228 | * @state: Pointer to the new struct drm_dp_mst_topology_state | |||
| 5229 | * @mgr: MST topology manager | |||
| 5230 | * | |||
| 5231 | * Whenever there is a change in mst topology | |||
| 5232 | * DSC configuration would have to be recalculated | |||
| 5233 | * therefore we need to trigger modeset on all affected | |||
| 5234 | * CRTCs in that topology | |||
| 5235 | * | |||
| 5236 | * See also: | |||
| 5237 | * drm_dp_mst_atomic_enable_dsc() | |||
| 5238 | */ | |||
| 5239 | int drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state, struct drm_dp_mst_topology_mgr *mgr) | |||
| 5240 | { | |||
| 5241 | struct drm_dp_mst_topology_state *mst_state; | |||
| 5242 | struct drm_dp_mst_atomic_payload *pos; | |||
| 5243 | struct drm_connector *connector; | |||
| 5244 | struct drm_connector_state *conn_state; | |||
| 5245 | struct drm_crtc *crtc; | |||
| 5246 | struct drm_crtc_state *crtc_state; | |||
| 5247 | ||||
| 5248 | mst_state = drm_atomic_get_mst_topology_state(state, mgr); | |||
| 5249 | ||||
| 5250 | if (IS_ERR(mst_state)) | |||
| 5251 | return PTR_ERR(mst_state); | |||
| 5252 | ||||
| 5253 | list_for_each_entry(pos, &mst_state->payloads, next)for (pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) *__mptr = ((&mst_state->payloads)->next); (__typeof (*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos) , next) );}); &pos->next != (&mst_state->payloads ); pos = ({ const __typeof( ((__typeof(*pos) *)0)->next ) * __mptr = (pos->next.next); (__typeof(*pos) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pos), next) );})) { | |||
| 5254 | ||||
| 5255 | connector = pos->port->connector; | |||
| 5256 | ||||
| 5257 | if (!connector) | |||
| 5258 | return -EINVAL22; | |||
| 5259 | ||||
| 5260 | conn_state = drm_atomic_get_connector_state(state, connector); | |||
| 5261 | ||||
| 5262 | if (IS_ERR(conn_state)) | |||
| 5263 | return PTR_ERR(conn_state); | |||
| 5264 | ||||
| 5265 | crtc = conn_state->crtc; | |||
| 5266 | ||||
| 5267 | if (!crtc) | |||
| 5268 | continue; | |||
| 5269 | ||||
| 5270 | if (!drm_dp_mst_dsc_aux_for_port(pos->port)) | |||
| 5271 | continue; | |||
| 5272 | ||||
| 5273 | crtc_state = drm_atomic_get_crtc_state(mst_state->base.state, crtc); | |||
| 5274 | ||||
| 5275 | if (IS_ERR(crtc_state)) | |||
| 5276 | return PTR_ERR(crtc_state); | |||
| 5277 | ||||
| 5278 | drm_dbg_atomic(mgr->dev, "[MST MGR:%p] Setting mode_changed flag on CRTC %p\n",__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] Setting mode_changed flag on CRTC %p\n" , mgr, crtc) | |||
| 5279 | mgr, crtc)__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST MGR:%p] Setting mode_changed flag on CRTC %p\n" , mgr, crtc); | |||
| 5280 | ||||
| 5281 | crtc_state->mode_changed = true1; | |||
| 5282 | } | |||
| 5283 | return 0; | |||
| 5284 | } | |||
| 5285 | EXPORT_SYMBOL(drm_dp_mst_add_affected_dsc_crtcs); | |||
| 5286 | ||||
| 5287 | /** | |||
| 5288 | * drm_dp_mst_atomic_enable_dsc - Set DSC Enable Flag to On/Off | |||
| 5289 | * @state: Pointer to the new drm_atomic_state | |||
| 5290 | * @port: Pointer to the affected MST Port | |||
| 5291 | * @pbn: Newly recalculated bw required for link with DSC enabled | |||
| 5292 | * @enable: Boolean flag to enable or disable DSC on the port | |||
| 5293 | * | |||
| 5294 | * This function enables DSC on the given Port | |||
| 5295 | * by recalculating its vcpi from pbn provided | |||
| 5296 | * and sets dsc_enable flag to keep track of which | |||
| 5297 | * ports have DSC enabled | |||
| 5298 | * | |||
| 5299 | */ | |||
| 5300 | int drm_dp_mst_atomic_enable_dsc(struct drm_atomic_state *state, | |||
| 5301 | struct drm_dp_mst_port *port, | |||
| 5302 | int pbn, bool_Bool enable) | |||
| 5303 | { | |||
| 5304 | struct drm_dp_mst_topology_state *mst_state; | |||
| 5305 | struct drm_dp_mst_atomic_payload *payload; | |||
| 5306 | int time_slots = 0; | |||
| 5307 | ||||
| 5308 | mst_state = drm_atomic_get_mst_topology_state(state, port->mgr); | |||
| 5309 | if (IS_ERR(mst_state)) | |||
| 5310 | return PTR_ERR(mst_state); | |||
| 5311 | ||||
| 5312 | payload = drm_atomic_get_mst_payload_state(mst_state, port); | |||
| 5313 | if (!payload) { | |||
| 5314 | drm_dbg_atomic(state->dev,__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] Couldn't find payload in mst state %p\n" , port, mst_state) | |||
| 5315 | "[MST PORT:%p] Couldn't find payload in mst state %p\n",__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] Couldn't find payload in mst state %p\n" , port, mst_state) | |||
| 5316 | port, mst_state)__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] Couldn't find payload in mst state %p\n" , port, mst_state); | |||
| 5317 | return -EINVAL22; | |||
| 5318 | } | |||
| 5319 | ||||
| 5320 | if (payload->dsc_enabled == enable) { | |||
| 5321 | drm_dbg_atomic(state->dev,__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] DSC flag is already set to %d, returning %d time slots\n" , port, enable, payload->time_slots) | |||
| 5322 | "[MST PORT:%p] DSC flag is already set to %d, returning %d time slots\n",__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] DSC flag is already set to %d, returning %d time slots\n" , port, enable, payload->time_slots) | |||
| 5323 | port, enable, payload->time_slots)__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] DSC flag is already set to %d, returning %d time slots\n" , port, enable, payload->time_slots); | |||
| 5324 | time_slots = payload->time_slots; | |||
| 5325 | } | |||
| 5326 | ||||
| 5327 | if (enable) { | |||
| 5328 | time_slots = drm_dp_atomic_find_time_slots(state, port->mgr, port, pbn); | |||
| 5329 | drm_dbg_atomic(state->dev,__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] Enabling DSC flag, reallocating %d time slots on the port\n" , port, time_slots) | |||
| 5330 | "[MST PORT:%p] Enabling DSC flag, reallocating %d time slots on the port\n",__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] Enabling DSC flag, reallocating %d time slots on the port\n" , port, time_slots) | |||
| 5331 | port, time_slots)__drm_dev_dbg(((void *)0), (state->dev) ? (state->dev)-> dev : ((void *)0), DRM_UT_ATOMIC, "[MST PORT:%p] Enabling DSC flag, reallocating %d time slots on the port\n" , port, time_slots); | |||
| 5332 | if (time_slots < 0) | |||
| 5333 | return -EINVAL22; | |||
| 5334 | } | |||
| 5335 | ||||
| 5336 | payload->dsc_enabled = enable; | |||
| 5337 | ||||
| 5338 | return time_slots; | |||
| 5339 | } | |||
| 5340 | EXPORT_SYMBOL(drm_dp_mst_atomic_enable_dsc); | |||
| 5341 | ||||
| 5342 | /** | |||
| 5343 | * drm_dp_mst_atomic_check - Check that the new state of an MST topology in an | |||
| 5344 | * atomic update is valid | |||
| 5345 | * @state: Pointer to the new &struct drm_dp_mst_topology_state | |||
| 5346 | * | |||
| 5347 | * Checks the given topology state for an atomic update to ensure that it's | |||
| 5348 | * valid. This includes checking whether there's enough bandwidth to support | |||
| 5349 | * the new timeslot allocations in the atomic update. | |||
| 5350 | * | |||
| 5351 | * Any atomic drivers supporting DP MST must make sure to call this after | |||
| 5352 | * checking the rest of their state in their | |||
| 5353 | * &drm_mode_config_funcs.atomic_check() callback. | |||
| 5354 | * | |||
| 5355 | * See also: | |||
| 5356 | * drm_dp_atomic_find_time_slots() | |||
| 5357 | * drm_dp_atomic_release_time_slots() | |||
| 5358 | * | |||
| 5359 | * Returns: | |||
| 5360 | * | |||
| 5361 | * 0 if the new state is valid, negative error code otherwise. | |||
| 5362 | */ | |||
| 5363 | int drm_dp_mst_atomic_check(struct drm_atomic_state *state) | |||
| 5364 | { | |||
| 5365 | struct drm_dp_mst_topology_mgr *mgr; | |||
| 5366 | struct drm_dp_mst_topology_state *mst_state; | |||
| 5367 | int i, ret = 0; | |||
| 5368 | ||||
| 5369 | for_each_new_mst_mgr_in_state(state, mgr, mst_state, i)for ((i) = 0; (i) < (state)->num_private_objs; (i)++) if (!(__drm_dp_mst_state_iter_get((state), &(mgr), ((void * )0), &(mst_state), (i)))) {} else { | |||
| 5370 | if (!mgr->mst_state) | |||
| 5371 | continue; | |||
| 5372 | ||||
| 5373 | ret = drm_dp_mst_atomic_check_payload_alloc_limits(mgr, mst_state); | |||
| 5374 | if (ret) | |||
| 5375 | break; | |||
| 5376 | ||||
| 5377 | mutex_lock(&mgr->lock)rw_enter_write(&mgr->lock); | |||
| 5378 | ret = drm_dp_mst_atomic_check_mstb_bw_limit(mgr->mst_primary, | |||
| 5379 | mst_state); | |||
| 5380 | mutex_unlock(&mgr->lock)rw_exit_write(&mgr->lock); | |||
| 5381 | if (ret < 0) | |||
| 5382 | break; | |||
| 5383 | else | |||
| 5384 | ret = 0; | |||
| 5385 | } | |||
| 5386 | ||||
| 5387 | return ret; | |||
| 5388 | } | |||
| 5389 | EXPORT_SYMBOL(drm_dp_mst_atomic_check); | |||
| 5390 | ||||
| 5391 | const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs = { | |||
| 5392 | .atomic_duplicate_state = drm_dp_mst_duplicate_state, | |||
| 5393 | .atomic_destroy_state = drm_dp_mst_destroy_state, | |||
| 5394 | }; | |||
| 5395 | EXPORT_SYMBOL(drm_dp_mst_topology_state_funcs); | |||
| 5396 | ||||
| 5397 | /** | |||
| 5398 | * drm_atomic_get_mst_topology_state: get MST topology state | |||
| 5399 | * @state: global atomic state | |||
| 5400 | * @mgr: MST topology manager, also the private object in this case | |||
| 5401 | * | |||
| 5402 | * This function wraps drm_atomic_get_priv_obj_state() passing in the MST atomic | |||
| 5403 | * state vtable so that the private object state returned is that of a MST | |||
| 5404 | * topology object. | |||
| 5405 | * | |||
| 5406 | * RETURNS: | |||
| 5407 | * | |||
| 5408 | * The MST topology state or error pointer. | |||
| 5409 | */ | |||
| 5410 | struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state, | |||
| 5411 | struct drm_dp_mst_topology_mgr *mgr) | |||
| 5412 | { | |||
| 5413 | return to_dp_mst_topology_state(drm_atomic_get_private_obj_state(state, &mgr->base))({ const __typeof( ((struct drm_dp_mst_topology_state *)0)-> base ) *__mptr = (drm_atomic_get_private_obj_state(state, & mgr->base)); (struct drm_dp_mst_topology_state *)( (char * )__mptr - __builtin_offsetof(struct drm_dp_mst_topology_state , base) );}); | |||
| 5414 | } | |||
| 5415 | EXPORT_SYMBOL(drm_atomic_get_mst_topology_state); | |||
| 5416 | ||||
| 5417 | /** | |||
| 5418 | * drm_atomic_get_old_mst_topology_state: get old MST topology state in atomic state, if any | |||
| 5419 | * @state: global atomic state | |||
| 5420 | * @mgr: MST topology manager, also the private object in this case | |||
| 5421 | * | |||
| 5422 | * This function wraps drm_atomic_get_old_private_obj_state() passing in the MST atomic | |||
| 5423 | * state vtable so that the private object state returned is that of a MST | |||
| 5424 | * topology object. | |||
| 5425 | * | |||
| 5426 | * Returns: | |||
| 5427 | * | |||
| 5428 | * The old MST topology state, or NULL if there's no topology state for this MST mgr | |||
| 5429 | * in the global atomic state | |||
| 5430 | */ | |||
| 5431 | struct drm_dp_mst_topology_state * | |||
| 5432 | drm_atomic_get_old_mst_topology_state(struct drm_atomic_state *state, | |||
| 5433 | struct drm_dp_mst_topology_mgr *mgr) | |||
| 5434 | { | |||
| 5435 | struct drm_private_state *old_priv_state = | |||
| 5436 | drm_atomic_get_old_private_obj_state(state, &mgr->base); | |||
| 5437 | ||||
| 5438 | return old_priv_state ? to_dp_mst_topology_state(old_priv_state)({ const __typeof( ((struct drm_dp_mst_topology_state *)0)-> base ) *__mptr = (old_priv_state); (struct drm_dp_mst_topology_state *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_state , base) );}) : NULL((void *)0); | |||
| 5439 | } | |||
| 5440 | EXPORT_SYMBOL(drm_atomic_get_old_mst_topology_state); | |||
| 5441 | ||||
| 5442 | /** | |||
| 5443 | * drm_atomic_get_new_mst_topology_state: get new MST topology state in atomic state, if any | |||
| 5444 | * @state: global atomic state | |||
| 5445 | * @mgr: MST topology manager, also the private object in this case | |||
| 5446 | * | |||
| 5447 | * This function wraps drm_atomic_get_new_private_obj_state() passing in the MST atomic | |||
| 5448 | * state vtable so that the private object state returned is that of a MST | |||
| 5449 | * topology object. | |||
| 5450 | * | |||
| 5451 | * Returns: | |||
| 5452 | * | |||
| 5453 | * The new MST topology state, or NULL if there's no topology state for this MST mgr | |||
| 5454 | * in the global atomic state | |||
| 5455 | */ | |||
| 5456 | struct drm_dp_mst_topology_state * | |||
| 5457 | drm_atomic_get_new_mst_topology_state(struct drm_atomic_state *state, | |||
| 5458 | struct drm_dp_mst_topology_mgr *mgr) | |||
| 5459 | { | |||
| 5460 | struct drm_private_state *new_priv_state = | |||
| 5461 | drm_atomic_get_new_private_obj_state(state, &mgr->base); | |||
| 5462 | ||||
| 5463 | return new_priv_state ? to_dp_mst_topology_state(new_priv_state)({ const __typeof( ((struct drm_dp_mst_topology_state *)0)-> base ) *__mptr = (new_priv_state); (struct drm_dp_mst_topology_state *)( (char *)__mptr - __builtin_offsetof(struct drm_dp_mst_topology_state , base) );}) : NULL((void *)0); | |||
| 5464 | } | |||
| 5465 | EXPORT_SYMBOL(drm_atomic_get_new_mst_topology_state); | |||
| 5466 | ||||
| 5467 | /** | |||
| 5468 | * drm_dp_mst_topology_mgr_init - initialise a topology manager | |||
| 5469 | * @mgr: manager struct to initialise | |||
| 5470 | * @dev: device providing this structure - for i2c addition. | |||
| 5471 | * @aux: DP helper aux channel to talk to this device | |||
| 5472 | * @max_dpcd_transaction_bytes: hw specific DPCD transaction limit | |||
| 5473 | * @max_payloads: maximum number of payloads this GPU can source | |||
| 5474 | * @conn_base_id: the connector object ID the MST device is connected to. | |||
| 5475 | * | |||
| 5476 | * Return 0 for success, or negative error code on failure | |||
| 5477 | */ | |||
| 5478 | int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, | |||
| 5479 | struct drm_device *dev, struct drm_dp_aux *aux, | |||
| 5480 | int max_dpcd_transaction_bytes, int max_payloads, | |||
| 5481 | int conn_base_id) | |||
| 5482 | { | |||
| 5483 | struct drm_dp_mst_topology_state *mst_state; | |||
| 5484 | ||||
| 5485 | rw_init(&mgr->lock, "mst")_rw_init_flags(&mgr->lock, "mst", 0, ((void *)0)); | |||
| 5486 | rw_init(&mgr->qlock, "mstq")_rw_init_flags(&mgr->qlock, "mstq", 0, ((void *)0)); | |||
| 5487 | rw_init(&mgr->delayed_destroy_lock, "mstdc")_rw_init_flags(&mgr->delayed_destroy_lock, "mstdc", 0, ((void *)0)); | |||
| 5488 | rw_init(&mgr->up_req_lock, "mstup")_rw_init_flags(&mgr->up_req_lock, "mstup", 0, ((void * )0)); | |||
| 5489 | rw_init(&mgr->probe_lock, "mstprb")_rw_init_flags(&mgr->probe_lock, "mstprb", 0, ((void * )0)); | |||
| 5490 | #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)0 | |||
| 5491 | rw_init(&mgr->topology_ref_history_lock, "msttr")_rw_init_flags(&mgr->topology_ref_history_lock, "msttr" , 0, ((void *)0)); | |||
| 5492 | stack_depot_init(); | |||
| 5493 | #endif | |||
| 5494 | INIT_LIST_HEAD(&mgr->tx_msg_downq); | |||
| 5495 | INIT_LIST_HEAD(&mgr->destroy_port_list); | |||
| 5496 | INIT_LIST_HEAD(&mgr->destroy_branch_device_list); | |||
| 5497 | INIT_LIST_HEAD(&mgr->up_req_list); | |||
| 5498 | ||||
| 5499 | /* | |||
| 5500 | * delayed_destroy_work will be queued on a dedicated WQ, so that any | |||
| 5501 | * requeuing will be also flushed when deiniting the topology manager. | |||
| 5502 | */ | |||
| 5503 | mgr->delayed_destroy_wq = alloc_ordered_workqueue("drm_dp_mst_wq", 0); | |||
| 5504 | if (mgr->delayed_destroy_wq == NULL((void *)0)) | |||
| 5505 | return -ENOMEM12; | |||
| 5506 | ||||
| 5507 | INIT_WORK(&mgr->work, drm_dp_mst_link_probe_work); | |||
| 5508 | INIT_WORK(&mgr->tx_work, drm_dp_tx_work); | |||
| 5509 | INIT_WORK(&mgr->delayed_destroy_work, drm_dp_delayed_destroy_work); | |||
| 5510 | INIT_WORK(&mgr->up_req_work, drm_dp_mst_up_req_work); | |||
| 5511 | init_waitqueue_head(&mgr->tx_waitq); | |||
| 5512 | mgr->dev = dev; | |||
| 5513 | mgr->aux = aux; | |||
| 5514 | mgr->max_dpcd_transaction_bytes = max_dpcd_transaction_bytes; | |||
| 5515 | mgr->max_payloads = max_payloads; | |||
| 5516 | mgr->conn_base_id = conn_base_id; | |||
| 5517 | ||||
| 5518 | mst_state = kzalloc(sizeof(*mst_state), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 5519 | if (mst_state == NULL((void *)0)) | |||
| 5520 | return -ENOMEM12; | |||
| 5521 | ||||
| 5522 | mst_state->total_avail_slots = 63; | |||
| 5523 | mst_state->start_slot = 1; | |||
| 5524 | ||||
| 5525 | mst_state->mgr = mgr; | |||
| 5526 | INIT_LIST_HEAD(&mst_state->payloads); | |||
| 5527 | ||||
| 5528 | drm_atomic_private_obj_init(dev, &mgr->base, | |||
| 5529 | &mst_state->base, | |||
| 5530 | &drm_dp_mst_topology_state_funcs); | |||
| 5531 | ||||
| 5532 | return 0; | |||
| 5533 | } | |||
| 5534 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_init); | |||
| 5535 | ||||
| 5536 | /** | |||
| 5537 | * drm_dp_mst_topology_mgr_destroy() - destroy topology manager. | |||
| 5538 | * @mgr: manager to destroy | |||
| 5539 | */ | |||
| 5540 | void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr) | |||
| 5541 | { | |||
| 5542 | drm_dp_mst_topology_mgr_set_mst(mgr, false0); | |||
| 5543 | flush_work(&mgr->work); | |||
| 5544 | /* The following will also drain any requeued work on the WQ. */ | |||
| 5545 | if (mgr->delayed_destroy_wq) { | |||
| 5546 | destroy_workqueue(mgr->delayed_destroy_wq); | |||
| 5547 | mgr->delayed_destroy_wq = NULL((void *)0); | |||
| 5548 | } | |||
| 5549 | mgr->dev = NULL((void *)0); | |||
| 5550 | mgr->aux = NULL((void *)0); | |||
| 5551 | drm_atomic_private_obj_fini(&mgr->base); | |||
| 5552 | mgr->funcs = NULL((void *)0); | |||
| 5553 | ||||
| 5554 | mutex_destroy(&mgr->delayed_destroy_lock); | |||
| 5555 | mutex_destroy(&mgr->qlock); | |||
| 5556 | mutex_destroy(&mgr->lock); | |||
| 5557 | mutex_destroy(&mgr->up_req_lock); | |||
| 5558 | mutex_destroy(&mgr->probe_lock); | |||
| 5559 | #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)0 | |||
| 5560 | mutex_destroy(&mgr->topology_ref_history_lock); | |||
| 5561 | #endif | |||
| 5562 | } | |||
| 5563 | EXPORT_SYMBOL(drm_dp_mst_topology_mgr_destroy); | |||
| 5564 | ||||
| 5565 | static bool_Bool remote_i2c_read_ok(const struct i2c_msg msgs[], int num) | |||
| 5566 | { | |||
| 5567 | int i; | |||
| 5568 | ||||
| 5569 | if (num - 1 > DP_REMOTE_I2C_READ_MAX_TRANSACTIONS4) | |||
| 5570 | return false0; | |||
| 5571 | ||||
| 5572 | for (i = 0; i < num - 1; i++) { | |||
| 5573 | if (msgs[i].flags & I2C_M_RD0x0001 || | |||
| 5574 | msgs[i].len > 0xff) | |||
| 5575 | return false0; | |||
| 5576 | } | |||
| 5577 | ||||
| 5578 | return msgs[num - 1].flags & I2C_M_RD0x0001 && | |||
| 5579 | msgs[num - 1].len <= 0xff; | |||
| 5580 | } | |||
| 5581 | ||||
| 5582 | static bool_Bool remote_i2c_write_ok(const struct i2c_msg msgs[], int num) | |||
| 5583 | { | |||
| 5584 | int i; | |||
| 5585 | ||||
| 5586 | for (i = 0; i < num - 1; i++) { | |||
| 5587 | if (msgs[i].flags & I2C_M_RD0x0001 || !(msgs[i].flags & I2C_M_STOP0x0004) || | |||
| 5588 | msgs[i].len > 0xff) | |||
| 5589 | return false0; | |||
| 5590 | } | |||
| 5591 | ||||
| 5592 | return !(msgs[num - 1].flags & I2C_M_RD0x0001) && msgs[num - 1].len <= 0xff; | |||
| 5593 | } | |||
| 5594 | ||||
| 5595 | static int drm_dp_mst_i2c_read(struct drm_dp_mst_branch *mstb, | |||
| 5596 | struct drm_dp_mst_port *port, | |||
| 5597 | struct i2c_msg *msgs, int num) | |||
| 5598 | { | |||
| 5599 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; | |||
| 5600 | unsigned int i; | |||
| 5601 | struct drm_dp_sideband_msg_req_body msg; | |||
| 5602 | struct drm_dp_sideband_msg_tx *txmsg = NULL((void *)0); | |||
| 5603 | int ret; | |||
| 5604 | ||||
| 5605 | memset(&msg, 0, sizeof(msg))__builtin_memset((&msg), (0), (sizeof(msg))); | |||
| 5606 | msg.req_type = DP_REMOTE_I2C_READ0x22; | |||
| 5607 | msg.u.i2c_read.num_transactions = num - 1; | |||
| 5608 | msg.u.i2c_read.port_number = port->port_num; | |||
| 5609 | for (i = 0; i < num - 1; i++) { | |||
| 5610 | msg.u.i2c_read.transactions[i].i2c_dev_id = msgs[i].addr; | |||
| 5611 | msg.u.i2c_read.transactions[i].num_bytes = msgs[i].len; | |||
| 5612 | msg.u.i2c_read.transactions[i].bytes = msgs[i].buf; | |||
| 5613 | msg.u.i2c_read.transactions[i].no_stop_bit = !(msgs[i].flags & I2C_M_STOP0x0004); | |||
| 5614 | } | |||
| 5615 | msg.u.i2c_read.read_i2c_device_id = msgs[num - 1].addr; | |||
| 5616 | msg.u.i2c_read.num_bytes_read = msgs[num - 1].len; | |||
| 5617 | ||||
| 5618 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 5619 | if (!txmsg) { | |||
| 5620 | ret = -ENOMEM12; | |||
| 5621 | goto out; | |||
| 5622 | } | |||
| 5623 | ||||
| 5624 | txmsg->dst = mstb; | |||
| 5625 | drm_dp_encode_sideband_req(&msg, txmsg); | |||
| 5626 | ||||
| 5627 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 5628 | ||||
| 5629 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 5630 | if (ret > 0) { | |||
| 5631 | ||||
| 5632 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 5633 | ret = -EREMOTEIO5; | |||
| 5634 | goto out; | |||
| 5635 | } | |||
| 5636 | if (txmsg->reply.u.remote_i2c_read_ack.num_bytes != msgs[num - 1].len) { | |||
| 5637 | ret = -EIO5; | |||
| 5638 | goto out; | |||
| 5639 | } | |||
| 5640 | memcpy(msgs[num - 1].buf, txmsg->reply.u.remote_i2c_read_ack.bytes, msgs[num - 1].len)__builtin_memcpy((msgs[num - 1].buf), (txmsg->reply.u.remote_i2c_read_ack .bytes), (msgs[num - 1].len)); | |||
| 5641 | ret = num; | |||
| 5642 | } | |||
| 5643 | out: | |||
| 5644 | kfree(txmsg); | |||
| 5645 | return ret; | |||
| 5646 | } | |||
| 5647 | ||||
| 5648 | static int drm_dp_mst_i2c_write(struct drm_dp_mst_branch *mstb, | |||
| 5649 | struct drm_dp_mst_port *port, | |||
| 5650 | struct i2c_msg *msgs, int num) | |||
| 5651 | { | |||
| 5652 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; | |||
| 5653 | unsigned int i; | |||
| 5654 | struct drm_dp_sideband_msg_req_body msg; | |||
| 5655 | struct drm_dp_sideband_msg_tx *txmsg = NULL((void *)0); | |||
| 5656 | int ret; | |||
| 5657 | ||||
| 5658 | txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL(0x0001 | 0x0004)); | |||
| 5659 | if (!txmsg) { | |||
| 5660 | ret = -ENOMEM12; | |||
| 5661 | goto out; | |||
| 5662 | } | |||
| 5663 | for (i = 0; i < num; i++) { | |||
| 5664 | memset(&msg, 0, sizeof(msg))__builtin_memset((&msg), (0), (sizeof(msg))); | |||
| 5665 | msg.req_type = DP_REMOTE_I2C_WRITE0x23; | |||
| 5666 | msg.u.i2c_write.port_number = port->port_num; | |||
| 5667 | msg.u.i2c_write.write_i2c_device_id = msgs[i].addr; | |||
| 5668 | msg.u.i2c_write.num_bytes = msgs[i].len; | |||
| 5669 | msg.u.i2c_write.bytes = msgs[i].buf; | |||
| 5670 | ||||
| 5671 | memset(txmsg, 0, sizeof(*txmsg))__builtin_memset((txmsg), (0), (sizeof(*txmsg))); | |||
| 5672 | txmsg->dst = mstb; | |||
| 5673 | ||||
| 5674 | drm_dp_encode_sideband_req(&msg, txmsg); | |||
| 5675 | drm_dp_queue_down_tx(mgr, txmsg); | |||
| 5676 | ||||
| 5677 | ret = drm_dp_mst_wait_tx_reply(mstb, txmsg); | |||
| 5678 | if (ret > 0) { | |||
| 5679 | if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK0x01) { | |||
| 5680 | ret = -EREMOTEIO5; | |||
| 5681 | goto out; | |||
| 5682 | } | |||
| 5683 | } else { | |||
| 5684 | goto out; | |||
| 5685 | } | |||
| 5686 | } | |||
| 5687 | ret = num; | |||
| 5688 | out: | |||
| 5689 | kfree(txmsg); | |||
| 5690 | return ret; | |||
| 5691 | } | |||
| 5692 | ||||
| 5693 | /* I2C device */ | |||
| 5694 | static int drm_dp_mst_i2c_xfer(struct i2c_adapter *adapter, | |||
| 5695 | struct i2c_msg *msgs, int num) | |||
| 5696 | { | |||
| 5697 | struct drm_dp_aux *aux = adapter->algo_data; | |||
| 5698 | struct drm_dp_mst_port *port = | |||
| 5699 | container_of(aux, struct drm_dp_mst_port, aux)({ const __typeof( ((struct drm_dp_mst_port *)0)->aux ) *__mptr = (aux); (struct drm_dp_mst_port *)( (char *)__mptr - __builtin_offsetof (struct drm_dp_mst_port, aux) );}); | |||
| 5700 | struct drm_dp_mst_branch *mstb; | |||
| 5701 | struct drm_dp_mst_topology_mgr *mgr = port->mgr; | |||
| 5702 | int ret; | |||
| 5703 | ||||
| 5704 | mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent); | |||
| 5705 | if (!mstb) | |||
| 5706 | return -EREMOTEIO5; | |||
| 5707 | ||||
| 5708 | if (remote_i2c_read_ok(msgs, num)) { | |||
| 5709 | ret = drm_dp_mst_i2c_read(mstb, port, msgs, num); | |||
| 5710 | } else if (remote_i2c_write_ok(msgs, num)) { | |||
| 5711 | ret = drm_dp_mst_i2c_write(mstb, port, msgs, num); | |||
| 5712 | } else { | |||
| 5713 | drm_dbg_kms(mgr->dev, "Unsupported I2C transaction for MST device\n")__drm_dev_dbg(((void *)0), (mgr->dev) ? (mgr->dev)-> dev : ((void *)0), DRM_UT_KMS, "Unsupported I2C transaction for MST device\n" ); | |||
| 5714 | ret = -EIO5; | |||
| 5715 | } | |||
| 5716 | ||||
| 5717 | drm_dp_mst_topology_put_mstb(mstb); | |||
| 5718 | return ret; | |||
| 5719 | } | |||
| 5720 | ||||
| 5721 | static u32 drm_dp_mst_i2c_functionality(struct i2c_adapter *adapter) | |||
| 5722 | { | |||
| 5723 | return I2C_FUNC_I2C0 | I2C_FUNC_SMBUS_EMUL0 | | |||
| 5724 | I2C_FUNC_SMBUS_READ_BLOCK_DATA0 | | |||
| 5725 | I2C_FUNC_SMBUS_BLOCK_PROC_CALL0 | | |||
| 5726 | I2C_FUNC_10BIT_ADDR0; | |||
| 5727 | } | |||
| 5728 | ||||
| 5729 | static const struct i2c_algorithm drm_dp_mst_i2c_algo = { | |||
| 5730 | .functionality = drm_dp_mst_i2c_functionality, | |||
| 5731 | .master_xfer = drm_dp_mst_i2c_xfer, | |||
| 5732 | }; | |||
| 5733 | ||||
| 5734 | /** | |||
| 5735 | * drm_dp_mst_register_i2c_bus() - register an I2C adapter for I2C-over-AUX | |||
| 5736 | * @port: The port to add the I2C bus on | |||
| 5737 | * | |||
| 5738 | * Returns 0 on success or a negative error code on failure. | |||
| 5739 | */ | |||
| 5740 | static int drm_dp_mst_register_i2c_bus(struct drm_dp_mst_port *port) | |||
| 5741 | { | |||
| 5742 | struct drm_dp_aux *aux = &port->aux; | |||
| 5743 | #ifdef __linux__ | |||
| 5744 | struct device *parent_dev = port->mgr->dev->dev; | |||
| 5745 | #endif | |||
| 5746 | ||||
| 5747 | aux->ddc.algo = &drm_dp_mst_i2c_algo; | |||
| 5748 | aux->ddc.algo_data = aux; | |||
| 5749 | aux->ddc.retries = 3; | |||
| 5750 | ||||
| 5751 | #ifdef __linux__ | |||
| 5752 | aux->ddc.class = I2C_CLASS_DDC; | |||
| 5753 | aux->ddc.owner = THIS_MODULE((void *)0); | |||
| 5754 | /* FIXME: set the kdev of the port's connector as parent */ | |||
| 5755 | aux->ddc.dev.parent = parent_dev; | |||
| 5756 | aux->ddc.dev.of_node = parent_dev->of_node; | |||
| 5757 | #endif | |||
| 5758 | ||||
| 5759 | strlcpy(aux->ddc.name, aux->name ? aux->name : dev_name(parent_dev)"", | |||
| 5760 | sizeof(aux->ddc.name)); | |||
| 5761 | ||||
| 5762 | return i2c_add_adapter(&aux->ddc); | |||
| 5763 | } | |||
| 5764 | ||||
| 5765 | /** | |||
| 5766 | * drm_dp_mst_unregister_i2c_bus() - unregister an I2C-over-AUX adapter | |||
| 5767 | * @port: The port to remove the I2C bus from | |||
| 5768 | */ | |||
| 5769 | static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_mst_port *port) | |||
| 5770 | { | |||
| 5771 | i2c_del_adapter(&port->aux.ddc); | |||
| 5772 | } | |||
| 5773 | ||||
| 5774 | /** | |||
| 5775 | * drm_dp_mst_is_virtual_dpcd() - Is the given port a virtual DP Peer Device | |||
| 5776 | * @port: The port to check | |||
| 5777 | * | |||
| 5778 | * A single physical MST hub object can be represented in the topology | |||
| 5779 | * by multiple branches, with virtual ports between those branches. | |||
| 5780 | * | |||
| 5781 | * As of DP1.4, An MST hub with internal (virtual) ports must expose | |||
| 5782 | * certain DPCD registers over those ports. See sections 2.6.1.1.1 | |||
| 5783 | * and 2.6.1.1.2 of Display Port specification v1.4 for details. | |||
| 5784 | * | |||
| 5785 | * May acquire mgr->lock | |||
| 5786 | * | |||
| 5787 | * Returns: | |||
| 5788 | * true if the port is a virtual DP peer device, false otherwise | |||
| 5789 | */ | |||
| 5790 | static bool_Bool drm_dp_mst_is_virtual_dpcd(struct drm_dp_mst_port *port) | |||
| 5791 | { | |||
| 5792 | struct drm_dp_mst_port *downstream_port; | |||
| 5793 | ||||
| 5794 | if (!port || port->dpcd_rev < DP_DPCD_REV_140x14) | |||
| 5795 | return false0; | |||
| 5796 | ||||
| 5797 | /* Virtual DP Sink (Internal Display Panel) */ | |||
| 5798 | if (port->port_num >= 8) | |||
| 5799 | return true1; | |||
| 5800 | ||||
| 5801 | /* DP-to-HDMI Protocol Converter */ | |||
| 5802 | if (port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV0x4 && | |||
| 5803 | !port->mcs && | |||
| 5804 | port->ldps) | |||
| 5805 | return true1; | |||
| 5806 | ||||
| 5807 | /* DP-to-DP */ | |||
| 5808 | mutex_lock(&port->mgr->lock)rw_enter_write(&port->mgr->lock); | |||
| 5809 | if (port->pdt == DP_PEER_DEVICE_MST_BRANCHING0x2 && | |||
| 5810 | port->mstb && | |||
| 5811 | port->mstb->num_ports == 2) { | |||
| 5812 | list_for_each_entry(downstream_port, &port->mstb->ports, next)for (downstream_port = ({ const __typeof( ((__typeof(*downstream_port ) *)0)->next ) *__mptr = ((&port->mstb->ports)-> next); (__typeof(*downstream_port) *)( (char *)__mptr - __builtin_offsetof (__typeof(*downstream_port), next) );}); &downstream_port ->next != (&port->mstb->ports); downstream_port = ({ const __typeof( ((__typeof(*downstream_port) *)0)->next ) *__mptr = (downstream_port->next.next); (__typeof(*downstream_port ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*downstream_port ), next) );})) { | |||
| 5813 | if (downstream_port->pdt == DP_PEER_DEVICE_SST_SINK0x3 && | |||
| 5814 | !downstream_port->input) { | |||
| 5815 | mutex_unlock(&port->mgr->lock)rw_exit_write(&port->mgr->lock); | |||
| 5816 | return true1; | |||
| 5817 | } | |||
| 5818 | } | |||
| 5819 | } | |||
| 5820 | mutex_unlock(&port->mgr->lock)rw_exit_write(&port->mgr->lock); | |||
| 5821 | ||||
| 5822 | return false0; | |||
| 5823 | } | |||
| 5824 | ||||
| 5825 | /** | |||
| 5826 | * drm_dp_mst_dsc_aux_for_port() - Find the correct aux for DSC | |||
| 5827 | * @port: The port to check. A leaf of the MST tree with an attached display. | |||
| 5828 | * | |||
| 5829 | * Depending on the situation, DSC may be enabled via the endpoint aux, | |||
| 5830 | * the immediately upstream aux, or the connector's physical aux. | |||
| 5831 | * | |||
| 5832 | * This is both the correct aux to read DSC_CAPABILITY and the | |||
| 5833 | * correct aux to write DSC_ENABLED. | |||
| 5834 | * | |||
| 5835 | * This operation can be expensive (up to four aux reads), so | |||
| 5836 | * the caller should cache the return. | |||
| 5837 | * | |||
| 5838 | * Returns: | |||
| 5839 | * NULL if DSC cannot be enabled on this port, otherwise the aux device | |||
| 5840 | */ | |||
| 5841 | struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port) | |||
| 5842 | { | |||
| 5843 | struct drm_dp_mst_port *immediate_upstream_port; | |||
| 5844 | struct drm_dp_mst_port *fec_port; | |||
| 5845 | struct drm_dp_desc desc = {}; | |||
| 5846 | u8 endpoint_fec; | |||
| 5847 | u8 endpoint_dsc; | |||
| 5848 | ||||
| 5849 | if (!port) | |||
| 5850 | return NULL((void *)0); | |||
| 5851 | ||||
| 5852 | if (port->parent->port_parent) | |||
| 5853 | immediate_upstream_port = port->parent->port_parent; | |||
| 5854 | else | |||
| 5855 | immediate_upstream_port = NULL((void *)0); | |||
| 5856 | ||||
| 5857 | fec_port = immediate_upstream_port; | |||
| 5858 | while (fec_port) { | |||
| 5859 | /* | |||
| 5860 | * Each physical link (i.e. not a virtual port) between the | |||
| 5861 | * output and the primary device must support FEC | |||
| 5862 | */ | |||
| 5863 | if (!drm_dp_mst_is_virtual_dpcd(fec_port) && | |||
| 5864 | !fec_port->fec_capable) | |||
| 5865 | return NULL((void *)0); | |||
| 5866 | ||||
| 5867 | fec_port = fec_port->parent->port_parent; | |||
| 5868 | } | |||
| 5869 | ||||
| 5870 | /* DP-to-DP peer device */ | |||
| 5871 | if (drm_dp_mst_is_virtual_dpcd(immediate_upstream_port)) { | |||
| 5872 | u8 upstream_dsc; | |||
| 5873 | ||||
| 5874 | if (drm_dp_dpcd_read(&port->aux, | |||
| 5875 | DP_DSC_SUPPORT0x060, &endpoint_dsc, 1) != 1) | |||
| 5876 | return NULL((void *)0); | |||
| 5877 | if (drm_dp_dpcd_read(&port->aux, | |||
| 5878 | DP_FEC_CAPABILITY0x090, &endpoint_fec, 1) != 1) | |||
| 5879 | return NULL((void *)0); | |||
| 5880 | if (drm_dp_dpcd_read(&immediate_upstream_port->aux, | |||
| 5881 | DP_DSC_SUPPORT0x060, &upstream_dsc, 1) != 1) | |||
| 5882 | return NULL((void *)0); | |||
| 5883 | ||||
| 5884 | /* Enpoint decompression with DP-to-DP peer device */ | |||
| 5885 | if ((endpoint_dsc & DP_DSC_DECOMPRESSION_IS_SUPPORTED(1 << 0)) && | |||
| 5886 | (endpoint_fec & DP_FEC_CAPABLE(1 << 0)) && | |||
| 5887 | (upstream_dsc & DP_DSC_PASSTHROUGH_IS_SUPPORTED(1 << 1))) { | |||
| 5888 | port->passthrough_aux = &immediate_upstream_port->aux; | |||
| 5889 | return &port->aux; | |||
| 5890 | } | |||
| 5891 | ||||
| 5892 | /* Virtual DPCD decompression with DP-to-DP peer device */ | |||
| 5893 | return &immediate_upstream_port->aux; | |||
| 5894 | } | |||
| 5895 | ||||
| 5896 | /* Virtual DPCD decompression with DP-to-HDMI or Virtual DP Sink */ | |||
| 5897 | if (drm_dp_mst_is_virtual_dpcd(port)) | |||
| 5898 | return &port->aux; | |||
| 5899 | ||||
| 5900 | /* | |||
| 5901 | * Synaptics quirk | |||
| 5902 | * Applies to ports for which: | |||
| 5903 | * - Physical aux has Synaptics OUI | |||
| 5904 | * - DPv1.4 or higher | |||
| 5905 | * - Port is on primary branch device | |||
| 5906 | * - Not a VGA adapter (DP_DWN_STRM_PORT_TYPE_ANALOG) | |||
| 5907 | */ | |||
| 5908 | if (drm_dp_read_desc(port->mgr->aux, &desc, true1)) | |||
| 5909 | return NULL((void *)0); | |||
| 5910 | ||||
| 5911 | if (drm_dp_has_quirk(&desc, DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD) && | |||
| 5912 | port->mgr->dpcd[DP_DPCD_REV0x000] >= DP_DPCD_REV_140x14 && | |||
| 5913 | port->parent == port->mgr->mst_primary) { | |||
| 5914 | u8 dpcd_ext[DP_RECEIVER_CAP_SIZE0xf]; | |||
| 5915 | ||||
| 5916 | if (drm_dp_read_dpcd_caps(port->mgr->aux, dpcd_ext) < 0) | |||
| 5917 | return NULL((void *)0); | |||
| 5918 | ||||
| 5919 | if ((dpcd_ext[DP_DOWNSTREAMPORT_PRESENT0x005] & DP_DWN_STRM_PORT_PRESENT(1 << 0)) && | |||
| 5920 | ((dpcd_ext[DP_DOWNSTREAMPORT_PRESENT0x005] & DP_DWN_STRM_PORT_TYPE_MASK0x06) | |||
| 5921 | != DP_DWN_STRM_PORT_TYPE_ANALOG(1 << 1))) | |||
| 5922 | return port->mgr->aux; | |||
| 5923 | } | |||
| 5924 | ||||
| 5925 | /* | |||
| 5926 | * The check below verifies if the MST sink | |||
| 5927 | * connected to the GPU is capable of DSC - | |||
| 5928 | * therefore the endpoint needs to be | |||
| 5929 | * both DSC and FEC capable. | |||
| 5930 | */ | |||
| 5931 | if (drm_dp_dpcd_read(&port->aux, | |||
| 5932 | DP_DSC_SUPPORT0x060, &endpoint_dsc, 1) != 1) | |||
| 5933 | return NULL((void *)0); | |||
| 5934 | if (drm_dp_dpcd_read(&port->aux, | |||
| 5935 | DP_FEC_CAPABILITY0x090, &endpoint_fec, 1) != 1) | |||
| 5936 | return NULL((void *)0); | |||
| 5937 | if ((endpoint_dsc & DP_DSC_DECOMPRESSION_IS_SUPPORTED(1 << 0)) && | |||
| 5938 | (endpoint_fec & DP_FEC_CAPABLE(1 << 0))) | |||
| 5939 | return &port->aux; | |||
| 5940 | ||||
| 5941 | return NULL((void *)0); | |||
| 5942 | } | |||
| 5943 | EXPORT_SYMBOL(drm_dp_mst_dsc_aux_for_port); |