Bug Summary

File:dev/pci/drm/i915/display/intel_dvo.c
Warning:line 532, column 4
Value stored to 'encoder_type' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name intel_dvo.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -D CONFIG_DRM_AMD_DC_DCN3_0 -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /usr/obj/sys/arch/amd64/compile/GENERIC.MP/scan-build/2022-01-12-131800-47421-1 -x c /usr/src/sys/dev/pci/drm/i915/display/intel_dvo.c
1/*
2 * Copyright 2006 Dave Airlie <airlied@linux.ie>
3 * Copyright © 2006-2007 Intel Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Eric Anholt <eric@anholt.net>
26 */
27
28#include <linux/i2c.h>
29#include <linux/slab.h>
30
31#include <drm/drm_atomic_helper.h>
32#include <drm/drm_crtc.h>
33
34#include "i915_drv.h"
35#include "intel_connector.h"
36#include "intel_display_types.h"
37#include "intel_dvo.h"
38#include "intel_dvo_dev.h"
39#include "intel_gmbus.h"
40#include "intel_panel.h"
41
42#define INTEL_DVO_CHIP_NONE0 0
43#define INTEL_DVO_CHIP_LVDS1 1
44#define INTEL_DVO_CHIP_TMDS2 2
45#define INTEL_DVO_CHIP_TVOUT4 4
46#define INTEL_DVO_CHIP_LVDS_NO_FIXED5 5
47
48#define SIL164_ADDR0x38 0x38
49#define CH7xxx_ADDR0x76 0x76
50#define TFP410_ADDR0x38 0x38
51#define NS2501_ADDR0x38 0x38
52
53static const struct intel_dvo_device intel_dvo_devices[] = {
54 {
55 .type = INTEL_DVO_CHIP_TMDS2,
56 .name = "sil164",
57 .dvo_reg = DVOC((const i915_reg_t){ .reg = (0x61160) }),
58 .dvo_srcdim_reg = DVOC_SRCDIM((const i915_reg_t){ .reg = (0x61164) }),
59 .slave_addr = SIL164_ADDR0x38,
60 .dev_ops = &sil164_ops,
61 },
62 {
63 .type = INTEL_DVO_CHIP_TMDS2,
64 .name = "ch7xxx",
65 .dvo_reg = DVOC((const i915_reg_t){ .reg = (0x61160) }),
66 .dvo_srcdim_reg = DVOC_SRCDIM((const i915_reg_t){ .reg = (0x61164) }),
67 .slave_addr = CH7xxx_ADDR0x76,
68 .dev_ops = &ch7xxx_ops,
69 },
70 {
71 .type = INTEL_DVO_CHIP_TMDS2,
72 .name = "ch7xxx",
73 .dvo_reg = DVOC((const i915_reg_t){ .reg = (0x61160) }),
74 .dvo_srcdim_reg = DVOC_SRCDIM((const i915_reg_t){ .reg = (0x61164) }),
75 .slave_addr = 0x75, /* For some ch7010 */
76 .dev_ops = &ch7xxx_ops,
77 },
78 {
79 .type = INTEL_DVO_CHIP_LVDS1,
80 .name = "ivch",
81 .dvo_reg = DVOA((const i915_reg_t){ .reg = (0x61120) }),
82 .dvo_srcdim_reg = DVOA_SRCDIM((const i915_reg_t){ .reg = (0x61124) }),
83 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
84 .dev_ops = &ivch_ops,
85 },
86 {
87 .type = INTEL_DVO_CHIP_TMDS2,
88 .name = "tfp410",
89 .dvo_reg = DVOC((const i915_reg_t){ .reg = (0x61160) }),
90 .dvo_srcdim_reg = DVOC_SRCDIM((const i915_reg_t){ .reg = (0x61164) }),
91 .slave_addr = TFP410_ADDR0x38,
92 .dev_ops = &tfp410_ops,
93 },
94 {
95 .type = INTEL_DVO_CHIP_LVDS1,
96 .name = "ch7017",
97 .dvo_reg = DVOC((const i915_reg_t){ .reg = (0x61160) }),
98 .dvo_srcdim_reg = DVOC_SRCDIM((const i915_reg_t){ .reg = (0x61164) }),
99 .slave_addr = 0x75,
100 .gpio = GMBUS_PIN_DPB5,
101 .dev_ops = &ch7017_ops,
102 },
103 {
104 .type = INTEL_DVO_CHIP_LVDS_NO_FIXED5,
105 .name = "ns2501",
106 .dvo_reg = DVOB((const i915_reg_t){ .reg = (0x61140) }),
107 .dvo_srcdim_reg = DVOB_SRCDIM((const i915_reg_t){ .reg = (0x61144) }),
108 .slave_addr = NS2501_ADDR0x38,
109 .dev_ops = &ns2501_ops,
110 },
111};
112
113struct intel_dvo {
114 struct intel_encoder base;
115
116 struct intel_dvo_device dev;
117
118 struct intel_connector *attached_connector;
119
120 bool_Bool panel_wants_dither;
121};
122
123static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder)
124{
125 return container_of(encoder, struct intel_dvo, base)({ const __typeof( ((struct intel_dvo *)0)->base ) *__mptr
= (encoder); (struct intel_dvo *)( (char *)__mptr - __builtin_offsetof
(struct intel_dvo, base) );});
126}
127
128static struct intel_dvo *intel_attached_dvo(struct intel_connector *connector)
129{
130 return enc_to_dvo(intel_attached_encoder(connector));
131}
132
133static bool_Bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
134{
135 struct drm_device *dev = connector->base.dev;
136 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(dev);
137 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
138 u32 tmp;
139
140 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
141
142 if (!(tmp & DVO_ENABLE(1 << 31)))
143 return false0;
144
145 return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
146}
147
148static bool_Bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
149 enum pipe *pipe)
150{
151 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(encoder->base.dev);
152 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
153 u32 tmp;
154
155 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
156
157 *pipe = (tmp & DVO_PIPE_SEL_MASK(1 << 30)) >> DVO_PIPE_SEL_SHIFT30;
158
159 return tmp & DVO_ENABLE(1 << 31);
160}
161
162static void intel_dvo_get_config(struct intel_encoder *encoder,
163 struct intel_crtc_state *pipe_config)
164{
165 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(encoder->base.dev);
166 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
167 u32 tmp, flags = 0;
168
169 pipe_config->output_types |= BIT(INTEL_OUTPUT_DVO)(1UL << (INTEL_OUTPUT_DVO));
170
171 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
172 if (tmp & DVO_HSYNC_ACTIVE_HIGH(1 << 3))
173 flags |= DRM_MODE_FLAG_PHSYNC(1<<0);
174 else
175 flags |= DRM_MODE_FLAG_NHSYNC(1<<1);
176 if (tmp & DVO_VSYNC_ACTIVE_HIGH(1 << 4))
177 flags |= DRM_MODE_FLAG_PVSYNC(1<<2);
178 else
179 flags |= DRM_MODE_FLAG_NVSYNC(1<<3);
180
181 pipe_config->hw.adjusted_mode.flags |= flags;
182
183 pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock;
184}
185
186static void intel_disable_dvo(struct intel_atomic_state *state,
187 struct intel_encoder *encoder,
188 const struct intel_crtc_state *old_crtc_state,
189 const struct drm_connector_state *old_conn_state)
190{
191 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(encoder->base.dev);
192 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
193 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
194 u32 temp = intel_de_read(dev_priv, dvo_reg);
195
196 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false0);
197 intel_de_write(dev_priv, dvo_reg, temp & ~DVO_ENABLE(1 << 31));
198 intel_de_read(dev_priv, dvo_reg);
199}
200
201static void intel_enable_dvo(struct intel_atomic_state *state,
202 struct intel_encoder *encoder,
203 const struct intel_crtc_state *pipe_config,
204 const struct drm_connector_state *conn_state)
205{
206 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(encoder->base.dev);
207 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
208 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
209 u32 temp = intel_de_read(dev_priv, dvo_reg);
210
211 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
212 &pipe_config->hw.mode,
213 &pipe_config->hw.adjusted_mode);
214
215 intel_de_write(dev_priv, dvo_reg, temp | DVO_ENABLE(1 << 31));
216 intel_de_read(dev_priv, dvo_reg);
217
218 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true1);
219}
220
221static enum drm_mode_status
222intel_dvo_mode_valid(struct drm_connector *connector,
223 struct drm_display_mode *mode)
224{
225 struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector)({ const __typeof( ((struct intel_connector *)0)->base ) *
__mptr = (connector); (struct intel_connector *)( (char *)__mptr
- __builtin_offsetof(struct intel_connector, base) );}));
226 const struct drm_display_mode *fixed_mode =
227 to_intel_connector(connector)({ const __typeof( ((struct intel_connector *)0)->base ) *
__mptr = (connector); (struct intel_connector *)( (char *)__mptr
- __builtin_offsetof(struct intel_connector, base) );})->panel.fixed_mode;
228 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
229 int target_clock = mode->clock;
230
231 if (mode->flags & DRM_MODE_FLAG_DBLSCAN(1<<5))
232 return MODE_NO_DBLESCAN;
233
234 /* XXX: Validate clock range */
235
236 if (fixed_mode) {
237 if (mode->hdisplay > fixed_mode->hdisplay)
238 return MODE_PANEL;
239 if (mode->vdisplay > fixed_mode->vdisplay)
240 return MODE_PANEL;
241
242 target_clock = fixed_mode->clock;
243 }
244
245 if (target_clock > max_dotclk)
246 return MODE_CLOCK_HIGH;
247
248 return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
249}
250
251static int intel_dvo_compute_config(struct intel_encoder *encoder,
252 struct intel_crtc_state *pipe_config,
253 struct drm_connector_state *conn_state)
254{
255 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
256 const struct drm_display_mode *fixed_mode =
257 intel_dvo->attached_connector->panel.fixed_mode;
258 struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
259
260 /*
261 * If we have timings from the BIOS for the panel, put them in
262 * to the adjusted mode. The CRTC will be set up for this mode,
263 * with the panel scaling set up to source from the H/VDisplay
264 * of the original mode.
265 */
266 if (fixed_mode)
267 intel_fixed_panel_mode(fixed_mode, adjusted_mode);
268
269 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN(1<<5))
270 return -EINVAL22;
271
272 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
273
274 return 0;
275}
276
277static void intel_dvo_pre_enable(struct intel_atomic_state *state,
278 struct intel_encoder *encoder,
279 const struct intel_crtc_state *pipe_config,
280 const struct drm_connector_state *conn_state)
281{
282 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(encoder->base.dev);
283 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc)({ const __typeof( ((struct intel_crtc *)0)->base ) *__mptr
= (pipe_config->uapi.crtc); (struct intel_crtc *)( (char *
)__mptr - __builtin_offsetof(struct intel_crtc, base) );});
284 const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
285 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
286 enum pipe pipe = crtc->pipe;
287 u32 dvo_val;
288 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
289 i915_reg_t dvo_srcdim_reg = intel_dvo->dev.dvo_srcdim_reg;
290
291 /* Save the data order, since I don't know what it should be set to. */
292 dvo_val = intel_de_read(dev_priv, dvo_reg) &
293 (DVO_PRESERVE_MASK(0x7 << 24) | DVO_DATA_ORDER_GBRG(1 << 6));
294 dvo_val |= DVO_DATA_ORDER_FP(1 << 14) | DVO_BORDER_ENABLE(1 << 7) |
295 DVO_BLANK_ACTIVE_HIGH(1 << 2);
296
297 dvo_val |= DVO_PIPE_SEL(pipe)((pipe) << 30);
298 dvo_val |= DVO_PIPE_STALL(1 << 28);
299 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC(1<<0))
300 dvo_val |= DVO_HSYNC_ACTIVE_HIGH(1 << 3);
301 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC(1<<2))
302 dvo_val |= DVO_VSYNC_ACTIVE_HIGH(1 << 4);
303
304 /*I915_WRITE(DVOB_SRCDIM,
305 (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
306 (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
307 intel_de_write(dev_priv, dvo_srcdim_reg,
308 (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT12) | (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT0));
309 /*I915_WRITE(DVOB, dvo_val);*/
310 intel_de_write(dev_priv, dvo_reg, dvo_val);
311}
312
313static enum drm_connector_status
314intel_dvo_detect(struct drm_connector *connector, bool_Bool force)
315{
316 struct drm_i915_privateinteldrm_softc *i915 = to_i915(connector->dev);
317 struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector)({ const __typeof( ((struct intel_connector *)0)->base ) *
__mptr = (connector); (struct intel_connector *)( (char *)__mptr
- __builtin_offsetof(struct intel_connector, base) );}));
318
319 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",__drm_dbg(DRM_UT_KMS, "[CONNECTOR:%d:%s]\n", connector->base
.id, connector->name)
320 connector->base.id, connector->name)__drm_dbg(DRM_UT_KMS, "[CONNECTOR:%d:%s]\n", connector->base
.id, connector->name);
321
322 if (!INTEL_DISPLAY_ENABLED(i915)(({ int __ret = !!((!((&(i915)->__info)->pipe_mask !=
0))); if (__ret) printf("%s %s: " "%s", dev_driver_string(((
&(i915)->drm))->dev), "", "drm_WARN_ON(" "!((&(i915)->__info)->pipe_mask != 0)"
")"); __builtin_expect(!!(__ret), 0); }), !(i915)->params
.disable_display))
323 return connector_status_disconnected;
324
325 return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
326}
327
328static int intel_dvo_get_modes(struct drm_connector *connector)
329{
330 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(connector->dev);
331 const struct drm_display_mode *fixed_mode =
332 to_intel_connector(connector)({ const __typeof( ((struct intel_connector *)0)->base ) *
__mptr = (connector); (struct intel_connector *)( (char *)__mptr
- __builtin_offsetof(struct intel_connector, base) );})->panel.fixed_mode;
333 int num_modes;
334
335 /*
336 * We should probably have an i2c driver get_modes function for those
337 * devices which will have a fixed set of modes determined by the chip
338 * (TV-out, for example), but for now with just TMDS and LVDS,
339 * that's not the case.
340 */
341 num_modes = intel_ddc_get_modes(connector,
342 intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPC4));
343 if (num_modes)
344 return num_modes;
345
346 if (fixed_mode) {
347 struct drm_display_mode *mode;
348
349 mode = drm_mode_duplicate(connector->dev, fixed_mode);
350 if (mode) {
351 drm_mode_probed_add(connector, mode);
352 num_modes++;
353 }
354 }
355
356 return num_modes;
357}
358
359static const struct drm_connector_funcs intel_dvo_connector_funcs = {
360 .detect = intel_dvo_detect,
361 .late_register = intel_connector_register,
362 .early_unregister = intel_connector_unregister,
363 .destroy = intel_connector_destroy,
364 .fill_modes = drm_helper_probe_single_connector_modes,
365 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
366 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
367};
368
369static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
370 .mode_valid = intel_dvo_mode_valid,
371 .get_modes = intel_dvo_get_modes,
372};
373
374static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
375{
376 struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder)({ const __typeof( ((struct intel_encoder *)0)->base ) *__mptr
= (encoder); (struct intel_encoder *)( (char *)__mptr - __builtin_offsetof
(struct intel_encoder, base) );}));
377
378 if (intel_dvo->dev.dev_ops->destroy)
379 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
380
381 intel_encoder_destroy(encoder);
382}
383
384static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
385 .destroy = intel_dvo_enc_destroy,
386};
387
388/*
389 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
390 *
391 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
392 * chip being on DVOB/C and having multiple pipes.
393 */
394static struct drm_display_mode *
395intel_dvo_get_current_mode(struct intel_encoder *encoder)
396{
397 struct drm_display_mode *mode;
398
399 mode = intel_encoder_current_mode(encoder);
400 if (mode) {
401 DRM_DEBUG_KMS("using current (BIOS) mode: ")__drm_dbg(DRM_UT_KMS, "using current (BIOS) mode: ");
402 drm_mode_debug_printmodeline(mode);
403 mode->type |= DRM_MODE_TYPE_PREFERRED(1<<3);
404 }
405
406 return mode;
407}
408
409static enum port intel_dvo_port(i915_reg_t dvo_reg)
410{
411 if (i915_mmio_reg_equal(dvo_reg, DVOA((const i915_reg_t){ .reg = (0x61120) })))
412 return PORT_A;
413 else if (i915_mmio_reg_equal(dvo_reg, DVOB((const i915_reg_t){ .reg = (0x61140) })))
414 return PORT_B;
415 else
416 return PORT_C;
417}
418
419void intel_dvo_init(struct drm_i915_privateinteldrm_softc *dev_priv)
420{
421 struct intel_encoder *intel_encoder;
422 struct intel_dvo *intel_dvo;
423 struct intel_connector *intel_connector;
424 int i;
425 int encoder_type = DRM_MODE_ENCODER_NONE0;
426
427 intel_dvo = kzalloc(sizeof(*intel_dvo), GFP_KERNEL(0x0001 | 0x0004));
428 if (!intel_dvo)
429 return;
430
431 intel_connector = intel_connector_alloc();
432 if (!intel_connector) {
433 kfree(intel_dvo);
434 return;
435 }
436
437 intel_dvo->attached_connector = intel_connector;
438
439 intel_encoder = &intel_dvo->base;
440
441 intel_encoder->disable = intel_disable_dvo;
442 intel_encoder->enable = intel_enable_dvo;
443 intel_encoder->get_hw_state = intel_dvo_get_hw_state;
444 intel_encoder->get_config = intel_dvo_get_config;
445 intel_encoder->compute_config = intel_dvo_compute_config;
446 intel_encoder->pre_enable = intel_dvo_pre_enable;
447 intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
448
449 /* Now, try to find a controller */
450 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices)(sizeof((intel_dvo_devices)) / sizeof((intel_dvo_devices)[0])
); i++) {
451 struct drm_connector *connector = &intel_connector->base;
452 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
453 struct i2c_adapter *i2c;
454 int gpio;
455 bool_Bool dvoinit;
456 enum pipe pipe;
457 u32 dpll[I915_MAX_PIPES];
458 enum port port;
459
460 /*
461 * Allow the I2C driver info to specify the GPIO to be used in
462 * special cases, but otherwise default to what's defined
463 * in the spec.
464 */
465 if (intel_gmbus_is_valid_pin(dev_priv, dvo->gpio))
466 gpio = dvo->gpio;
467 else if (dvo->type == INTEL_DVO_CHIP_LVDS1)
468 gpio = GMBUS_PIN_SSC1;
469 else
470 gpio = GMBUS_PIN_DPB5;
471
472 /*
473 * Set up the I2C bus necessary for the chip we're probing.
474 * It appears that everything is on GPIOE except for panels
475 * on i830 laptops, which are on GPIOB (DVOA).
476 */
477 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
478
479 intel_dvo->dev = *dvo;
480
481 /*
482 * GMBUS NAK handling seems to be unstable, hence let the
483 * transmitter detection run in bit banging mode for now.
484 */
485 intel_gmbus_force_bit(i2c, true1);
486
487 /*
488 * ns2501 requires the DVO 2x clock before it will
489 * respond to i2c accesses, so make sure we have
490 * have the clock enabled before we attempt to
491 * initialize the device.
492 */
493 for_each_pipe(dev_priv, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(dev_priv)->__info)->pipe_mask & (1UL <<
(pipe)))) {} else {
494 dpll[pipe] = intel_de_read(dev_priv, DPLL(pipe)((const i915_reg_t){ .reg = ((((const u32 []){ (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6014), (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6018), (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6030) })[(pipe)]))
}));
495 intel_de_write(dev_priv, DPLL(pipe)((const i915_reg_t){ .reg = ((((const u32 []){ (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6014), (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6018), (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6030) })[(pipe)]))
}),
496 dpll[pipe] | DPLL_DVO_2X_MODE(1 << 30));
497 }
498
499 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c);
500
501 /* restore the DVO 2x clock state to original */
502 for_each_pipe(dev_priv, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(dev_priv)->__info)->pipe_mask & (1UL <<
(pipe)))) {} else {
503 intel_de_write(dev_priv, DPLL(pipe)((const i915_reg_t){ .reg = ((((const u32 []){ (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6014), (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6018), (((&(dev_priv
)->__info)->display_mmio_offset) + 0x6030) })[(pipe)]))
}), dpll[pipe]);
504 }
505
506 intel_gmbus_force_bit(i2c, false0);
507
508 if (!dvoinit)
509 continue;
510
511 port = intel_dvo_port(dvo->dvo_reg);
512 drm_encoder_init(&dev_priv->drm, &intel_encoder->base,
513 &intel_dvo_enc_funcs, encoder_type,
514 "DVO %c", port_name(port)((port) + 'A'));
515
516 intel_encoder->type = INTEL_OUTPUT_DVO;
517 intel_encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
518 intel_encoder->port = port;
519 intel_encoder->pipe_mask = ~0;
520
521 if (dvo->type != INTEL_DVO_CHIP_LVDS1)
522 intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) |
523 (1 << INTEL_OUTPUT_DVO);
524
525 switch (dvo->type) {
526 case INTEL_DVO_CHIP_TMDS2:
527 intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT(1 << 1) |
528 DRM_CONNECTOR_POLL_DISCONNECT(1 << 2);
529 drm_connector_init(&dev_priv->drm, connector,
530 &intel_dvo_connector_funcs,
531 DRM_MODE_CONNECTOR_DVII2);
532 encoder_type = DRM_MODE_ENCODER_TMDS2;
Value stored to 'encoder_type' is never read
533 break;
534 case INTEL_DVO_CHIP_LVDS_NO_FIXED5:
535 case INTEL_DVO_CHIP_LVDS1:
536 drm_connector_init(&dev_priv->drm, connector,
537 &intel_dvo_connector_funcs,
538 DRM_MODE_CONNECTOR_LVDS7);
539 encoder_type = DRM_MODE_ENCODER_LVDS3;
540 break;
541 }
542
543 drm_connector_helper_add(connector,
544 &intel_dvo_connector_helper_funcs);
545 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
546 connector->interlace_allowed = false0;
547 connector->doublescan_allowed = false0;
548
549 intel_connector_attach_encoder(intel_connector, intel_encoder);
550 if (dvo->type == INTEL_DVO_CHIP_LVDS1) {
551 /*
552 * For our LVDS chipsets, we should hopefully be able
553 * to dig the fixed panel mode out of the BIOS data.
554 * However, it's in a different format from the BIOS
555 * data on chipsets with integrated LVDS (stored in AIM
556 * headers, likely), so for now, just get the current
557 * mode being output through DVO.
558 */
559 intel_panel_init(&intel_connector->panel,
560 intel_dvo_get_current_mode(intel_encoder),
561 NULL((void *)0));
562 intel_dvo->panel_wants_dither = true1;
563 }
564
565 return;
566 }
567
568 kfree(intel_dvo);
569 kfree(intel_connector);
570}