| File: | dev/pci/drm/drm_fb_helper.c |
| Warning: | line 157, column 24 Value stored to 'helper' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2006-2009 Red Hat Inc. |
| 3 | * Copyright (c) 2006-2008 Intel Corporation |
| 4 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| 5 | * |
| 6 | * DRM framebuffer helper functions |
| 7 | * |
| 8 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 9 | * documentation for any purpose is hereby granted without fee, provided that |
| 10 | * the above copyright notice appear in all copies and that both that copyright |
| 11 | * notice and this permission notice appear in supporting documentation, and |
| 12 | * that the name of the copyright holders not be used in advertising or |
| 13 | * publicity pertaining to distribution of the software without specific, |
| 14 | * written prior permission. The copyright holders make no representations |
| 15 | * about the suitability of this software for any purpose. It is provided "as |
| 16 | * is" without express or implied warranty. |
| 17 | * |
| 18 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 19 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 20 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 21 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 22 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 23 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 24 | * OF THIS SOFTWARE. |
| 25 | * |
| 26 | * Authors: |
| 27 | * Dave Airlie <airlied@linux.ie> |
| 28 | * Jesse Barnes <jesse.barnes@intel.com> |
| 29 | */ |
| 30 | #define pr_fmt(fmt)KBUILD_MODNAME ": " fmt KBUILD_MODNAME ": " fmt |
| 31 | |
| 32 | #include <linux/console.h> |
| 33 | #include <linux/dma-buf.h> |
| 34 | #include <linux/kernel.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/sysrq.h> |
| 38 | #include <linux/vmalloc.h> |
| 39 | |
| 40 | #include <drm/drm_atomic.h> |
| 41 | #include <drm/drm_crtc.h> |
| 42 | #include <drm/drm_crtc_helper.h> |
| 43 | #include <drm/drm_drv.h> |
| 44 | #include <drm/drm_fb_helper.h> |
| 45 | #include <drm/drm_fourcc.h> |
| 46 | #include <drm/drm_framebuffer.h> |
| 47 | #include <drm/drm_print.h> |
| 48 | #include <drm/drm_vblank.h> |
| 49 | |
| 50 | #include "drm_crtc_helper_internal.h" |
| 51 | #include "drm_internal.h" |
| 52 | |
| 53 | static bool_Bool drm_fbdev_emulation = true1; |
| 54 | module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); |
| 55 | MODULE_PARM_DESC(fbdev_emulation, |
| 56 | "Enable legacy fbdev emulation [default=true]"); |
| 57 | |
| 58 | static int drm_fbdev_overalloc = CONFIG_DRM_FBDEV_OVERALLOC100; |
| 59 | module_param(drm_fbdev_overalloc, int, 0444); |
| 60 | MODULE_PARM_DESC(drm_fbdev_overalloc, |
| 61 | "Overallocation of the fbdev buffer (%) [default=" |
| 62 | __MODULE_STRING(CONFIG_DRM_FBDEV_OVERALLOC) "]"); |
| 63 | |
| 64 | /* |
| 65 | * In order to keep user-space compatibility, we want in certain use-cases |
| 66 | * to keep leaking the fbdev physical address to the user-space program |
| 67 | * handling the fbdev buffer. |
| 68 | * This is a bad habit essentially kept into closed source opengl driver |
| 69 | * that should really be moved into open-source upstream projects instead |
| 70 | * of using legacy physical addresses in user space to communicate with |
| 71 | * other out-of-tree kernel modules. |
| 72 | * |
| 73 | * This module_param *should* be removed as soon as possible and be |
| 74 | * considered as a broken and legacy behaviour from a modern fbdev device. |
| 75 | */ |
| 76 | #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM)0 |
| 77 | static bool_Bool drm_leak_fbdev_smem = false0; |
| 78 | module_param_unsafe(drm_leak_fbdev_smem, bool, 0600); |
| 79 | MODULE_PARM_DESC(drm_leak_fbdev_smem, |
| 80 | "Allow unsafe leaking fbdev physical smem address [default=false]"); |
| 81 | #endif |
| 82 | |
| 83 | static DRM_LIST_HEAD(kernel_fb_helper_list)struct list_head kernel_fb_helper_list = { &(kernel_fb_helper_list ), &(kernel_fb_helper_list) }; |
| 84 | static DEFINE_MUTEX(kernel_fb_helper_lock)struct rwlock kernel_fb_helper_lock = { 0, "kernel_fb_helper_lock" }; |
| 85 | |
| 86 | /** |
| 87 | * DOC: fbdev helpers |
| 88 | * |
| 89 | * The fb helper functions are useful to provide an fbdev on top of a drm kernel |
| 90 | * mode setting driver. They can be used mostly independently from the crtc |
| 91 | * helper functions used by many drivers to implement the kernel mode setting |
| 92 | * interfaces. |
| 93 | * |
| 94 | * Drivers that support a dumb buffer with a virtual address and mmap support, |
| 95 | * should try out the generic fbdev emulation using drm_fbdev_generic_setup(). |
| 96 | * It will automatically set up deferred I/O if the driver requires a shadow |
| 97 | * buffer. |
| 98 | * |
| 99 | * At runtime drivers should restore the fbdev console by using |
| 100 | * drm_fb_helper_lastclose() as their &drm_driver.lastclose callback. |
| 101 | * They should also notify the fb helper code from updates to the output |
| 102 | * configuration by using drm_fb_helper_output_poll_changed() as their |
| 103 | * &drm_mode_config_funcs.output_poll_changed callback. |
| 104 | * |
| 105 | * For suspend/resume consider using drm_mode_config_helper_suspend() and |
| 106 | * drm_mode_config_helper_resume() which takes care of fbdev as well. |
| 107 | * |
| 108 | * All other functions exported by the fb helper library can be used to |
| 109 | * implement the fbdev driver interface by the driver. |
| 110 | * |
| 111 | * It is possible, though perhaps somewhat tricky, to implement race-free |
| 112 | * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() |
| 113 | * helper must be called first to initialize the minimum required to make |
| 114 | * hotplug detection work. Drivers also need to make sure to properly set up |
| 115 | * the &drm_mode_config.funcs member. After calling drm_kms_helper_poll_init() |
| 116 | * it is safe to enable interrupts and start processing hotplug events. At the |
| 117 | * same time, drivers should initialize all modeset objects such as CRTCs, |
| 118 | * encoders and connectors. To finish up the fbdev helper initialization, the |
| 119 | * drm_fb_helper_init() function is called. To probe for all attached displays |
| 120 | * and set up an initial configuration using the detected hardware, drivers |
| 121 | * should call drm_fb_helper_initial_config(). |
| 122 | * |
| 123 | * If &drm_framebuffer_funcs.dirty is set, the |
| 124 | * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will |
| 125 | * accumulate changes and schedule &drm_fb_helper.dirty_work to run right |
| 126 | * away. This worker then calls the dirty() function ensuring that it will |
| 127 | * always run in process context since the fb_*() function could be running in |
| 128 | * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io |
| 129 | * callback it will also schedule dirty_work with the damage collected from the |
| 130 | * mmap page writes. |
| 131 | * |
| 132 | * Deferred I/O is not compatible with SHMEM. Such drivers should request an |
| 133 | * fbdev shadow buffer and call drm_fbdev_generic_setup() instead. |
| 134 | */ |
| 135 | |
| 136 | static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) |
| 137 | { |
| 138 | uint16_t *r_base, *g_base, *b_base; |
| 139 | |
| 140 | if (crtc->funcs->gamma_set == NULL((void *)0)) |
| 141 | return; |
| 142 | |
| 143 | r_base = crtc->gamma_store; |
| 144 | g_base = r_base + crtc->gamma_size; |
| 145 | b_base = g_base + crtc->gamma_size; |
| 146 | |
| 147 | crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, |
| 148 | crtc->gamma_size, NULL((void *)0)); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * drm_fb_helper_debug_enter - implementation for &fb_ops.fb_debug_enter |
| 153 | * @info: fbdev registered by the helper |
| 154 | */ |
| 155 | int drm_fb_helper_debug_enter(struct fb_info *info) |
| 156 | { |
| 157 | struct drm_fb_helper *helper = info->par; |
Value stored to 'helper' during its initialization is never read | |
| 158 | const struct drm_crtc_helper_funcs *funcs; |
| 159 | struct drm_mode_set *mode_set; |
| 160 | |
| 161 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list)for (helper = ({ const __typeof( ((__typeof(*helper) *)0)-> kernel_fb_list ) *__mptr = ((&kernel_fb_helper_list)-> next); (__typeof(*helper) *)( (char *)__mptr - __builtin_offsetof (__typeof(*helper), kernel_fb_list) );}); &helper->kernel_fb_list != (&kernel_fb_helper_list); helper = ({ const __typeof( ((__typeof(*helper) *)0)->kernel_fb_list ) *__mptr = (helper ->kernel_fb_list.next); (__typeof(*helper) *)( (char *)__mptr - __builtin_offsetof(__typeof(*helper), kernel_fb_list) );}) ) { |
| 162 | mutex_lock(&helper->client.modeset_mutex)rw_enter_write(&helper->client.modeset_mutex); |
| 163 | drm_client_for_each_modeset(mode_set, &helper->client)for (({ do { (void)(&(&helper->client)->modeset_mutex ); } while(0); }), mode_set = (&helper->client)->modesets ; mode_set->crtc; mode_set++) { |
| 164 | if (!mode_set->crtc->enabled) |
| 165 | continue; |
| 166 | |
| 167 | funcs = mode_set->crtc->helper_private; |
| 168 | if (funcs->mode_set_base_atomic == NULL((void *)0)) |
| 169 | continue; |
| 170 | |
| 171 | if (drm_drv_uses_atomic_modeset(mode_set->crtc->dev)) |
| 172 | continue; |
| 173 | |
| 174 | funcs->mode_set_base_atomic(mode_set->crtc, |
| 175 | mode_set->fb, |
| 176 | mode_set->x, |
| 177 | mode_set->y, |
| 178 | ENTER_ATOMIC_MODE_SET); |
| 179 | } |
| 180 | mutex_unlock(&helper->client.modeset_mutex)rw_exit_write(&helper->client.modeset_mutex); |
| 181 | } |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | EXPORT_SYMBOL(drm_fb_helper_debug_enter); |
| 186 | |
| 187 | /** |
| 188 | * drm_fb_helper_debug_leave - implementation for &fb_ops.fb_debug_leave |
| 189 | * @info: fbdev registered by the helper |
| 190 | */ |
| 191 | int drm_fb_helper_debug_leave(struct fb_info *info) |
| 192 | { |
| 193 | struct drm_fb_helper *helper = info->par; |
| 194 | struct drm_client_dev *client = &helper->client; |
| 195 | #ifdef notyet |
| 196 | struct drm_device *dev = helper->dev; |
| 197 | #endif |
| 198 | struct drm_crtc *crtc; |
| 199 | const struct drm_crtc_helper_funcs *funcs; |
| 200 | struct drm_mode_set *mode_set; |
| 201 | struct drm_framebuffer *fb; |
| 202 | |
| 203 | mutex_lock(&client->modeset_mutex)rw_enter_write(&client->modeset_mutex); |
| 204 | drm_client_for_each_modeset(mode_set, client)for (({ do { (void)(&(client)->modeset_mutex); } while (0); }), mode_set = (client)->modesets; mode_set->crtc; mode_set++) { |
| 205 | crtc = mode_set->crtc; |
| 206 | if (drm_drv_uses_atomic_modeset(crtc->dev)) |
| 207 | continue; |
| 208 | |
| 209 | funcs = crtc->helper_private; |
| 210 | fb = crtc->primary->fb; |
| 211 | |
| 212 | if (!crtc->enabled) |
| 213 | continue; |
| 214 | |
| 215 | if (!fb) { |
| 216 | drm_err(dev, "no fb to restore?\n")printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "no fb to restore?\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__); |
| 217 | continue; |
| 218 | } |
| 219 | |
| 220 | if (funcs->mode_set_base_atomic == NULL((void *)0)) |
| 221 | continue; |
| 222 | |
| 223 | drm_fb_helper_restore_lut_atomic(mode_set->crtc); |
| 224 | funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, |
| 225 | crtc->y, LEAVE_ATOMIC_MODE_SET); |
| 226 | } |
| 227 | mutex_unlock(&client->modeset_mutex)rw_exit_write(&client->modeset_mutex); |
| 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | EXPORT_SYMBOL(drm_fb_helper_debug_leave); |
| 232 | |
| 233 | static int |
| 234 | __drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper, |
| 235 | bool_Bool force) |
| 236 | { |
| 237 | bool_Bool do_delayed; |
| 238 | int ret; |
| 239 | |
| 240 | if (!drm_fbdev_emulation || !fb_helper) |
| 241 | return -ENODEV19; |
| 242 | |
| 243 | if (READ_ONCE(fb_helper->deferred_setup)({ typeof(fb_helper->deferred_setup) __tmp = *(volatile typeof (fb_helper->deferred_setup) *)&(fb_helper->deferred_setup ); membar_datadep_consumer(); __tmp; })) |
| 244 | return 0; |
| 245 | |
| 246 | #ifdef __OpenBSD__1 |
| 247 | force = true1; |
| 248 | #endif |
| 249 | |
| 250 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 251 | if (force) { |
| 252 | /* |
| 253 | * Yes this is the _locked version which expects the master lock |
| 254 | * to be held. But for forced restores we're intentionally |
| 255 | * racing here, see drm_fb_helper_set_par(). |
| 256 | */ |
| 257 | ret = drm_client_modeset_commit_locked(&fb_helper->client); |
| 258 | } else { |
| 259 | ret = drm_client_modeset_commit(&fb_helper->client); |
| 260 | } |
| 261 | |
| 262 | do_delayed = fb_helper->delayed_hotplug; |
| 263 | if (do_delayed) |
| 264 | fb_helper->delayed_hotplug = false0; |
| 265 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 266 | |
| 267 | if (do_delayed) |
| 268 | drm_fb_helper_hotplug_event(fb_helper); |
| 269 | |
| 270 | return ret; |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration |
| 275 | * @fb_helper: driver-allocated fbdev helper, can be NULL |
| 276 | * |
| 277 | * This should be called from driver's drm &drm_driver.lastclose callback |
| 278 | * when implementing an fbcon on top of kms using this helper. This ensures that |
| 279 | * the user isn't greeted with a black screen when e.g. X dies. |
| 280 | * |
| 281 | * RETURNS: |
| 282 | * Zero if everything went ok, negative error code otherwise. |
| 283 | */ |
| 284 | int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) |
| 285 | { |
| 286 | return __drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper, false0); |
| 287 | } |
| 288 | EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); |
| 289 | |
| 290 | #ifdef CONFIG_MAGIC_SYSRQ |
| 291 | /* emergency restore, don't bother with error reporting */ |
| 292 | static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) |
| 293 | { |
| 294 | struct drm_fb_helper *helper; |
| 295 | |
| 296 | mutex_lock(&kernel_fb_helper_lock)rw_enter_write(&kernel_fb_helper_lock); |
| 297 | list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list)for (helper = ({ const __typeof( ((__typeof(*helper) *)0)-> kernel_fb_list ) *__mptr = ((&kernel_fb_helper_list)-> next); (__typeof(*helper) *)( (char *)__mptr - __builtin_offsetof (__typeof(*helper), kernel_fb_list) );}); &helper->kernel_fb_list != (&kernel_fb_helper_list); helper = ({ const __typeof( ((__typeof(*helper) *)0)->kernel_fb_list ) *__mptr = (helper ->kernel_fb_list.next); (__typeof(*helper) *)( (char *)__mptr - __builtin_offsetof(__typeof(*helper), kernel_fb_list) );}) ) { |
| 298 | struct drm_device *dev = helper->dev; |
| 299 | |
| 300 | if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) |
| 301 | continue; |
| 302 | |
| 303 | mutex_lock(&helper->lock)rw_enter_write(&helper->lock); |
| 304 | drm_client_modeset_commit_locked(&helper->client); |
| 305 | mutex_unlock(&helper->lock)rw_exit_write(&helper->lock); |
| 306 | } |
| 307 | mutex_unlock(&kernel_fb_helper_lock)rw_exit_write(&kernel_fb_helper_lock); |
| 308 | } |
| 309 | |
| 310 | static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); |
| 311 | |
| 312 | static void drm_fb_helper_sysrq(int dummy1) |
| 313 | { |
| 314 | schedule_work(&drm_fb_helper_restore_work); |
| 315 | } |
| 316 | |
| 317 | static const struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { |
| 318 | .handler = drm_fb_helper_sysrq, |
| 319 | .help_msg = "force-fb(v)", |
| 320 | .action_msg = "Restore framebuffer console", |
| 321 | }; |
| 322 | #else |
| 323 | static const struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; |
| 324 | #endif |
| 325 | |
| 326 | static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) |
| 327 | { |
| 328 | struct drm_fb_helper *fb_helper = info->par; |
| 329 | |
| 330 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 331 | drm_client_modeset_dpms(&fb_helper->client, dpms_mode); |
| 332 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * drm_fb_helper_blank - implementation for &fb_ops.fb_blank |
| 337 | * @blank: desired blanking state |
| 338 | * @info: fbdev registered by the helper |
| 339 | */ |
| 340 | int drm_fb_helper_blank(int blank, struct fb_info *info) |
| 341 | { |
| 342 | if (oops_in_progress_in_dbg_master()) |
| 343 | return -EBUSY16; |
| 344 | |
| 345 | switch (blank) { |
| 346 | /* Display: On; HSync: On, VSync: On */ |
| 347 | case FB_BLANK_UNBLANK0: |
| 348 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON0); |
| 349 | break; |
| 350 | /* Display: Off; HSync: On, VSync: On */ |
| 351 | case FB_BLANK_NORMAL1: |
| 352 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY1); |
| 353 | break; |
| 354 | /* Display: Off; HSync: Off, VSync: On */ |
| 355 | case FB_BLANK_HSYNC_SUSPEND2: |
| 356 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY1); |
| 357 | break; |
| 358 | /* Display: Off; HSync: On, VSync: Off */ |
| 359 | case FB_BLANK_VSYNC_SUSPEND3: |
| 360 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND2); |
| 361 | break; |
| 362 | /* Display: Off; HSync: Off, VSync: Off */ |
| 363 | case FB_BLANK_POWERDOWN4: |
| 364 | drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF3); |
| 365 | break; |
| 366 | } |
| 367 | return 0; |
| 368 | } |
| 369 | EXPORT_SYMBOL(drm_fb_helper_blank); |
| 370 | |
| 371 | static void drm_fb_helper_resume_worker(struct work_struct *work) |
| 372 | { |
| 373 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper,({ const __typeof( ((struct drm_fb_helper *)0)->resume_work ) *__mptr = (work); (struct drm_fb_helper *)( (char *)__mptr - __builtin_offsetof(struct drm_fb_helper, resume_work) );}) |
| 374 | resume_work)({ const __typeof( ((struct drm_fb_helper *)0)->resume_work ) *__mptr = (work); (struct drm_fb_helper *)( (char *)__mptr - __builtin_offsetof(struct drm_fb_helper, resume_work) );}); |
| 375 | |
| 376 | console_lock(); |
| 377 | fb_set_suspend(helper->fbdev, 0); |
| 378 | console_unlock(); |
| 379 | } |
| 380 | |
| 381 | static void drm_fb_helper_damage_blit_real(struct drm_fb_helper *fb_helper, |
| 382 | struct drm_clip_rect *clip, |
| 383 | struct iosys_map *dst) |
| 384 | { |
| 385 | struct drm_framebuffer *fb = fb_helper->fb; |
| 386 | size_t offset = clip->y1 * fb->pitches[0]; |
| 387 | size_t len = clip->x2 - clip->x1; |
| 388 | unsigned int y; |
| 389 | void *src; |
| 390 | |
| 391 | switch (drm_format_info_bpp(fb->format, 0)) { |
| 392 | case 1: |
| 393 | offset += clip->x1 / 8; |
| 394 | len = DIV_ROUND_UP(len + clip->x1 % 8, 8)(((len + clip->x1 % 8) + ((8) - 1)) / (8)); |
| 395 | break; |
| 396 | case 2: |
| 397 | offset += clip->x1 / 4; |
| 398 | len = DIV_ROUND_UP(len + clip->x1 % 4, 4)(((len + clip->x1 % 4) + ((4) - 1)) / (4)); |
| 399 | break; |
| 400 | case 4: |
| 401 | offset += clip->x1 / 2; |
| 402 | len = DIV_ROUND_UP(len + clip->x1 % 2, 2)(((len + clip->x1 % 2) + ((2) - 1)) / (2)); |
| 403 | break; |
| 404 | default: |
| 405 | offset += clip->x1 * fb->format->cpp[0]; |
| 406 | len *= fb->format->cpp[0]; |
| 407 | break; |
| 408 | } |
| 409 | |
| 410 | src = fb_helper->fbdev->screen_buffer + offset; |
| 411 | iosys_map_incr(dst, offset); /* go to first pixel within clip rect */ |
| 412 | |
| 413 | for (y = clip->y1; y < clip->y2; y++) { |
| 414 | iosys_map_memcpy_to(dst, 0, src, len); |
| 415 | iosys_map_incr(dst, fb->pitches[0]); |
| 416 | src += fb->pitches[0]; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | static int drm_fb_helper_damage_blit(struct drm_fb_helper *fb_helper, |
| 421 | struct drm_clip_rect *clip) |
| 422 | { |
| 423 | struct drm_client_buffer *buffer = fb_helper->buffer; |
| 424 | struct iosys_map map, dst; |
| 425 | int ret; |
| 426 | |
| 427 | /* |
| 428 | * We have to pin the client buffer to its current location while |
| 429 | * flushing the shadow buffer. In the general case, concurrent |
| 430 | * modesetting operations could try to move the buffer and would |
| 431 | * fail. The modeset has to be serialized by acquiring the reservation |
| 432 | * object of the underlying BO here. |
| 433 | * |
| 434 | * For fbdev emulation, we only have to protect against fbdev modeset |
| 435 | * operations. Nothing else will involve the client buffer's BO. So it |
| 436 | * is sufficient to acquire struct drm_fb_helper.lock here. |
| 437 | */ |
| 438 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 439 | |
| 440 | ret = drm_client_buffer_vmap(buffer, &map); |
| 441 | if (ret) |
| 442 | goto out; |
| 443 | |
| 444 | dst = map; |
| 445 | drm_fb_helper_damage_blit_real(fb_helper, clip, &dst); |
| 446 | |
| 447 | drm_client_buffer_vunmap(buffer); |
| 448 | |
| 449 | out: |
| 450 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 451 | |
| 452 | return ret; |
| 453 | } |
| 454 | |
| 455 | static void drm_fb_helper_damage_work(struct work_struct *work) |
| 456 | { |
| 457 | struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper,({ const __typeof( ((struct drm_fb_helper *)0)->damage_work ) *__mptr = (work); (struct drm_fb_helper *)( (char *)__mptr - __builtin_offsetof(struct drm_fb_helper, damage_work) );}) |
| 458 | damage_work)({ const __typeof( ((struct drm_fb_helper *)0)->damage_work ) *__mptr = (work); (struct drm_fb_helper *)( (char *)__mptr - __builtin_offsetof(struct drm_fb_helper, damage_work) );}); |
| 459 | struct drm_device *dev = helper->dev; |
| 460 | struct drm_clip_rect *clip = &helper->damage_clip; |
| 461 | struct drm_clip_rect clip_copy; |
| 462 | unsigned long flags; |
| 463 | int ret; |
| 464 | |
| 465 | spin_lock_irqsave(&helper->damage_lock, flags)do { flags = 0; mtx_enter(&helper->damage_lock); } while (0); |
| 466 | clip_copy = *clip; |
| 467 | clip->x1 = clip->y1 = ~0; |
| 468 | clip->x2 = clip->y2 = 0; |
| 469 | spin_unlock_irqrestore(&helper->damage_lock, flags)do { (void)(flags); mtx_leave(&helper->damage_lock); } while (0); |
| 470 | |
| 471 | /* Call damage handlers only if necessary */ |
| 472 | if (!(clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2)) |
| 473 | return; |
| 474 | |
| 475 | if (helper->buffer) { |
| 476 | ret = drm_fb_helper_damage_blit(helper, &clip_copy); |
| 477 | if (drm_WARN_ONCE(dev, ret, "Damage blitter failed: ret=%d\n", ret)({ static int __warned; int __ret = !!(ret); if (__ret && !__warned) { printf("%s %s: " "Damage blitter failed: ret=%d\n" , dev_driver_string((dev)->dev), "", ret); __warned = 1; } __builtin_expect(!!(__ret), 0); })) |
| 478 | goto err; |
| 479 | } |
| 480 | |
| 481 | if (helper->fb->funcs->dirty) { |
| 482 | ret = helper->fb->funcs->dirty(helper->fb, NULL((void *)0), 0, 0, &clip_copy, 1); |
| 483 | if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret)({ static int __warned; int __ret = !!(ret); if (__ret && !__warned) { printf("%s %s: " "Dirty helper failed: ret=%d\n" , dev_driver_string((dev)->dev), "", ret); __warned = 1; } __builtin_expect(!!(__ret), 0); })) |
| 484 | goto err; |
| 485 | } |
| 486 | |
| 487 | return; |
| 488 | |
| 489 | err: |
| 490 | /* |
| 491 | * Restore damage clip rectangle on errors. The next run |
| 492 | * of the damage worker will perform the update. |
| 493 | */ |
| 494 | spin_lock_irqsave(&helper->damage_lock, flags)do { flags = 0; mtx_enter(&helper->damage_lock); } while (0); |
| 495 | clip->x1 = min_t(u32, clip->x1, clip_copy.x1)({ u32 __min_a = (clip->x1); u32 __min_b = (clip_copy.x1); __min_a < __min_b ? __min_a : __min_b; }); |
| 496 | clip->y1 = min_t(u32, clip->y1, clip_copy.y1)({ u32 __min_a = (clip->y1); u32 __min_b = (clip_copy.y1); __min_a < __min_b ? __min_a : __min_b; }); |
| 497 | clip->x2 = max_t(u32, clip->x2, clip_copy.x2)({ u32 __max_a = (clip->x2); u32 __max_b = (clip_copy.x2); __max_a > __max_b ? __max_a : __max_b; }); |
| 498 | clip->y2 = max_t(u32, clip->y2, clip_copy.y2)({ u32 __max_a = (clip->y2); u32 __max_b = (clip_copy.y2); __max_a > __max_b ? __max_a : __max_b; }); |
| 499 | spin_unlock_irqrestore(&helper->damage_lock, flags)do { (void)(flags); mtx_leave(&helper->damage_lock); } while (0); |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * drm_fb_helper_prepare - setup a drm_fb_helper structure |
| 504 | * @dev: DRM device |
| 505 | * @helper: driver-allocated fbdev helper structure to set up |
| 506 | * @funcs: pointer to structure of functions associate with this helper |
| 507 | * |
| 508 | * Sets up the bare minimum to make the framebuffer helper usable. This is |
| 509 | * useful to implement race-free initialization of the polling helpers. |
| 510 | */ |
| 511 | void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, |
| 512 | const struct drm_fb_helper_funcs *funcs) |
| 513 | { |
| 514 | INIT_LIST_HEAD(&helper->kernel_fb_list); |
| 515 | mtx_init(&helper->damage_lock, IPL_TTY)do { (void)(((void *)0)); (void)(0); __mtx_init((&helper-> damage_lock), ((((0x9)) > 0x0 && ((0x9)) < 0x9) ? 0x9 : ((0x9)))); } while (0); |
| 516 | INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); |
| 517 | INIT_WORK(&helper->damage_work, drm_fb_helper_damage_work); |
| 518 | helper->damage_clip.x1 = helper->damage_clip.y1 = ~0; |
| 519 | rw_init(&helper->lock, "fbhlk")_rw_init_flags(&helper->lock, "fbhlk", 0, ((void *)0)); |
| 520 | helper->funcs = funcs; |
| 521 | helper->dev = dev; |
| 522 | } |
| 523 | EXPORT_SYMBOL(drm_fb_helper_prepare); |
| 524 | |
| 525 | /** |
| 526 | * drm_fb_helper_init - initialize a &struct drm_fb_helper |
| 527 | * @dev: drm device |
| 528 | * @fb_helper: driver-allocated fbdev helper structure to initialize |
| 529 | * |
| 530 | * This allocates the structures for the fbdev helper with the given limits. |
| 531 | * Note that this won't yet touch the hardware (through the driver interfaces) |
| 532 | * nor register the fbdev. This is only done in drm_fb_helper_initial_config() |
| 533 | * to allow driver writes more control over the exact init sequence. |
| 534 | * |
| 535 | * Drivers must call drm_fb_helper_prepare() before calling this function. |
| 536 | * |
| 537 | * RETURNS: |
| 538 | * Zero if everything went ok, nonzero otherwise. |
| 539 | */ |
| 540 | int drm_fb_helper_init(struct drm_device *dev, |
| 541 | struct drm_fb_helper *fb_helper) |
| 542 | { |
| 543 | int ret; |
| 544 | |
| 545 | if (!drm_fbdev_emulation) { |
| 546 | dev->fb_helper = fb_helper; |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | /* |
| 551 | * If this is not the generic fbdev client, initialize a drm_client |
| 552 | * without callbacks so we can use the modesets. |
| 553 | */ |
| 554 | if (!fb_helper->client.funcs) { |
| 555 | ret = drm_client_init(dev, &fb_helper->client, "drm_fb_helper", NULL((void *)0)); |
| 556 | if (ret) |
| 557 | return ret; |
| 558 | } |
| 559 | |
| 560 | dev->fb_helper = fb_helper; |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | EXPORT_SYMBOL(drm_fb_helper_init); |
| 565 | |
| 566 | /** |
| 567 | * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members |
| 568 | * @fb_helper: driver-allocated fbdev helper |
| 569 | * |
| 570 | * A helper to alloc fb_info and the members cmap and apertures. Called |
| 571 | * by the driver within the fb_probe fb_helper callback function. Drivers do not |
| 572 | * need to release the allocated fb_info structure themselves, this is |
| 573 | * automatically done when calling drm_fb_helper_fini(). |
| 574 | * |
| 575 | * RETURNS: |
| 576 | * fb_info pointer if things went okay, pointer containing error code |
| 577 | * otherwise |
| 578 | */ |
| 579 | struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) |
| 580 | { |
| 581 | struct device *dev = fb_helper->dev->dev; |
| 582 | struct fb_info *info; |
| 583 | #ifdef __linux__ |
| 584 | int ret; |
| 585 | #endif |
| 586 | |
| 587 | info = framebuffer_alloc(0, dev); |
| 588 | if (!info) |
| 589 | return ERR_PTR(-ENOMEM12); |
| 590 | |
| 591 | #ifdef __linux__ |
| 592 | ret = fb_alloc_cmap(&info->cmap, 256, 0); |
| 593 | if (ret) |
| 594 | goto err_release; |
| 595 | |
| 596 | /* |
| 597 | * TODO: We really should be smarter here and alloc an aperture |
| 598 | * for each IORESOURCE_MEM resource helper->dev->dev has and also |
| 599 | * init the ranges of the appertures based on the resources. |
| 600 | * Note some drivers currently count on there being only 1 empty |
| 601 | * aperture and fill this themselves, these will need to be dealt |
| 602 | * with somehow when fixing this. |
| 603 | */ |
| 604 | info->apertures = alloc_apertures(1); |
| 605 | if (!info->apertures) { |
| 606 | ret = -ENOMEM12; |
| 607 | goto err_free_cmap; |
| 608 | } |
| 609 | #endif |
| 610 | |
| 611 | fb_helper->fbdev = info; |
| 612 | info->skip_vt_switch = true1; |
| 613 | |
| 614 | return info; |
| 615 | |
| 616 | #ifdef __linux__ |
| 617 | err_free_cmap: |
| 618 | fb_dealloc_cmap(&info->cmap); |
| 619 | err_release: |
| 620 | framebuffer_release(info); |
| 621 | return ERR_PTR(ret); |
| 622 | #endif |
| 623 | } |
| 624 | EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); |
| 625 | |
| 626 | /** |
| 627 | * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device |
| 628 | * @fb_helper: driver-allocated fbdev helper, can be NULL |
| 629 | * |
| 630 | * A wrapper around unregister_framebuffer, to release the fb_info |
| 631 | * framebuffer device. This must be called before releasing all resources for |
| 632 | * @fb_helper by calling drm_fb_helper_fini(). |
| 633 | */ |
| 634 | void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) |
| 635 | { |
| 636 | if (fb_helper && fb_helper->fbdev) |
| 637 | unregister_framebuffer(fb_helper->fbdev); |
| 638 | } |
| 639 | EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); |
| 640 | |
| 641 | /** |
| 642 | * drm_fb_helper_fini - finialize a &struct drm_fb_helper |
| 643 | * @fb_helper: driver-allocated fbdev helper, can be NULL |
| 644 | * |
| 645 | * This cleans up all remaining resources associated with @fb_helper. |
| 646 | */ |
| 647 | void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) |
| 648 | { |
| 649 | struct fb_info *info; |
| 650 | |
| 651 | if (!fb_helper) |
| 652 | return; |
| 653 | |
| 654 | fb_helper->dev->fb_helper = NULL((void *)0); |
| 655 | |
| 656 | if (!drm_fbdev_emulation) |
| 657 | return; |
| 658 | |
| 659 | cancel_work_sync(&fb_helper->resume_work); |
| 660 | cancel_work_sync(&fb_helper->damage_work); |
| 661 | |
| 662 | info = fb_helper->fbdev; |
| 663 | if (info) { |
| 664 | #ifdef __linux__ |
| 665 | if (info->cmap.len) |
| 666 | fb_dealloc_cmap(&info->cmap); |
| 667 | #endif |
| 668 | framebuffer_release(info); |
| 669 | } |
| 670 | fb_helper->fbdev = NULL((void *)0); |
| 671 | |
| 672 | mutex_lock(&kernel_fb_helper_lock)rw_enter_write(&kernel_fb_helper_lock); |
| 673 | if (!list_empty(&fb_helper->kernel_fb_list)) { |
| 674 | list_del(&fb_helper->kernel_fb_list); |
| 675 | if (list_empty(&kernel_fb_helper_list)) |
| 676 | unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
| 677 | } |
| 678 | mutex_unlock(&kernel_fb_helper_lock)rw_exit_write(&kernel_fb_helper_lock); |
| 679 | |
| 680 | mutex_destroy(&fb_helper->lock); |
| 681 | |
| 682 | if (!fb_helper->client.funcs) |
| 683 | drm_client_release(&fb_helper->client); |
| 684 | } |
| 685 | EXPORT_SYMBOL(drm_fb_helper_fini); |
| 686 | |
| 687 | static bool_Bool drm_fbdev_use_shadow_fb(struct drm_fb_helper *fb_helper) |
| 688 | { |
| 689 | struct drm_device *dev = fb_helper->dev; |
| 690 | struct drm_framebuffer *fb = fb_helper->fb; |
| 691 | |
| 692 | return dev->mode_config.prefer_shadow_fbdev || |
| 693 | dev->mode_config.prefer_shadow || |
| 694 | fb->funcs->dirty; |
| 695 | } |
| 696 | |
| 697 | #ifdef __linux__ |
| 698 | |
| 699 | static void drm_fb_helper_damage(struct fb_info *info, u32 x, u32 y, |
| 700 | u32 width, u32 height) |
| 701 | { |
| 702 | struct drm_fb_helper *helper = info->par; |
| 703 | struct drm_clip_rect *clip = &helper->damage_clip; |
| 704 | unsigned long flags; |
| 705 | |
| 706 | if (!drm_fbdev_use_shadow_fb(helper)) |
| 707 | return; |
| 708 | |
| 709 | spin_lock_irqsave(&helper->damage_lock, flags)do { flags = 0; mtx_enter(&helper->damage_lock); } while (0); |
| 710 | clip->x1 = min_t(u32, clip->x1, x)({ u32 __min_a = (clip->x1); u32 __min_b = (x); __min_a < __min_b ? __min_a : __min_b; }); |
| 711 | clip->y1 = min_t(u32, clip->y1, y)({ u32 __min_a = (clip->y1); u32 __min_b = (y); __min_a < __min_b ? __min_a : __min_b; }); |
| 712 | clip->x2 = max_t(u32, clip->x2, x + width)({ u32 __max_a = (clip->x2); u32 __max_b = (x + width); __max_a > __max_b ? __max_a : __max_b; }); |
| 713 | clip->y2 = max_t(u32, clip->y2, y + height)({ u32 __max_a = (clip->y2); u32 __max_b = (y + height); __max_a > __max_b ? __max_a : __max_b; }); |
| 714 | spin_unlock_irqrestore(&helper->damage_lock, flags)do { (void)(flags); mtx_leave(&helper->damage_lock); } while (0); |
| 715 | |
| 716 | schedule_work(&helper->damage_work); |
| 717 | } |
| 718 | |
| 719 | /* |
| 720 | * Convert memory region into area of scanlines and pixels per |
| 721 | * scanline. The parameters off and len must not reach beyond |
| 722 | * the end of the framebuffer. |
| 723 | */ |
| 724 | static void drm_fb_helper_memory_range_to_clip(struct fb_info *info, off_t off, size_t len, |
| 725 | struct drm_rect *clip) |
| 726 | { |
| 727 | u32 line_length = info->fix.line_length; |
| 728 | u32 fb_height = info->var.yres; |
| 729 | off_t end = off + len; |
| 730 | u32 x1 = 0; |
| 731 | u32 y1 = off / line_length; |
| 732 | u32 x2 = info->var.xres; |
| 733 | u32 y2 = DIV_ROUND_UP(end, line_length)(((end) + ((line_length) - 1)) / (line_length)); |
| 734 | |
| 735 | /* Don't allow any of them beyond the bottom bound of display area */ |
| 736 | if (y1 > fb_height) |
| 737 | y1 = fb_height; |
| 738 | if (y2 > fb_height) |
| 739 | y2 = fb_height; |
| 740 | |
| 741 | if ((y2 - y1) == 1) { |
| 742 | /* |
| 743 | * We've only written to a single scanline. Try to reduce |
| 744 | * the number of horizontal pixels that need an update. |
| 745 | */ |
| 746 | off_t bit_off = (off % line_length) * 8; |
| 747 | off_t bit_end = (end % line_length) * 8; |
| 748 | |
| 749 | x1 = bit_off / info->var.bits_per_pixel; |
| 750 | x2 = DIV_ROUND_UP(bit_end, info->var.bits_per_pixel)(((bit_end) + ((info->var.bits_per_pixel) - 1)) / (info-> var.bits_per_pixel)); |
| 751 | } |
| 752 | |
| 753 | drm_rect_init(clip, x1, y1, x2 - x1, y2 - y1); |
| 754 | } |
| 755 | |
| 756 | /** |
| 757 | * drm_fb_helper_deferred_io() - fbdev deferred_io callback function |
| 758 | * @info: fb_info struct pointer |
| 759 | * @pagereflist: list of mmap framebuffer pages that have to be flushed |
| 760 | * |
| 761 | * This function is used as the &fb_deferred_io.deferred_io |
| 762 | * callback function for flushing the fbdev mmap writes. |
| 763 | */ |
| 764 | void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagereflist) |
| 765 | { |
| 766 | unsigned long start, end, min_off, max_off; |
| 767 | struct fb_deferred_io_pageref *pageref; |
| 768 | struct drm_rect damage_area; |
| 769 | |
| 770 | min_off = ULONG_MAX0xffffffffffffffffUL; |
| 771 | max_off = 0; |
| 772 | list_for_each_entry(pageref, pagereflist, list)for (pageref = ({ const __typeof( ((__typeof(*pageref) *)0)-> list ) *__mptr = ((pagereflist)->next); (__typeof(*pageref ) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pageref), list) );}); &pageref->list != (pagereflist); pageref = ({ const __typeof( ((__typeof(*pageref) *)0)->list ) *__mptr = (pageref->list.next); (__typeof(*pageref) *)( (char *)__mptr - __builtin_offsetof(__typeof(*pageref), list) );})) { |
| 773 | start = pageref->offset; |
| 774 | end = start + PAGE_SIZE(1 << 12); |
| 775 | min_off = min(min_off, start)(((min_off)<(start))?(min_off):(start)); |
| 776 | max_off = max(max_off, end)(((max_off)>(end))?(max_off):(end)); |
| 777 | } |
| 778 | if (min_off >= max_off) |
| 779 | return; |
| 780 | |
| 781 | /* |
| 782 | * As we can only track pages, we might reach beyond the end |
| 783 | * of the screen and account for non-existing scanlines. Hence, |
| 784 | * keep the covered memory area within the screen buffer. |
| 785 | */ |
| 786 | max_off = min(max_off, info->screen_size)(((max_off)<(info->screen_size))?(max_off):(info->screen_size )); |
| 787 | |
| 788 | drm_fb_helper_memory_range_to_clip(info, min_off, max_off - min_off, &damage_area); |
| 789 | drm_fb_helper_damage(info, damage_area.x1, damage_area.y1, |
| 790 | drm_rect_width(&damage_area), |
| 791 | drm_rect_height(&damage_area)); |
| 792 | } |
| 793 | EXPORT_SYMBOL(drm_fb_helper_deferred_io); |
| 794 | |
| 795 | /** |
| 796 | * drm_fb_helper_sys_read - wrapper around fb_sys_read |
| 797 | * @info: fb_info struct pointer |
| 798 | * @buf: userspace buffer to read from framebuffer memory |
| 799 | * @count: number of bytes to read from framebuffer memory |
| 800 | * @ppos: read offset within framebuffer memory |
| 801 | * |
| 802 | * A wrapper around fb_sys_read implemented by fbdev core |
| 803 | */ |
| 804 | ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, |
| 805 | size_t count, loff_t *ppos) |
| 806 | { |
| 807 | return fb_sys_read(info, buf, count, ppos); |
| 808 | } |
| 809 | EXPORT_SYMBOL(drm_fb_helper_sys_read); |
| 810 | |
| 811 | /** |
| 812 | * drm_fb_helper_sys_write - wrapper around fb_sys_write |
| 813 | * @info: fb_info struct pointer |
| 814 | * @buf: userspace buffer to write to framebuffer memory |
| 815 | * @count: number of bytes to write to framebuffer memory |
| 816 | * @ppos: write offset within framebuffer memory |
| 817 | * |
| 818 | * A wrapper around fb_sys_write implemented by fbdev core |
| 819 | */ |
| 820 | ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, |
| 821 | size_t count, loff_t *ppos) |
| 822 | { |
| 823 | loff_t pos = *ppos; |
| 824 | ssize_t ret; |
| 825 | struct drm_rect damage_area; |
| 826 | |
| 827 | ret = fb_sys_write(info, buf, count, ppos); |
| 828 | if (ret <= 0) |
| 829 | return ret; |
| 830 | |
| 831 | drm_fb_helper_memory_range_to_clip(info, pos, ret, &damage_area); |
| 832 | drm_fb_helper_damage(info, damage_area.x1, damage_area.y1, |
| 833 | drm_rect_width(&damage_area), |
| 834 | drm_rect_height(&damage_area)); |
| 835 | |
| 836 | return ret; |
| 837 | } |
| 838 | EXPORT_SYMBOL(drm_fb_helper_sys_write); |
| 839 | |
| 840 | /** |
| 841 | * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect |
| 842 | * @info: fbdev registered by the helper |
| 843 | * @rect: info about rectangle to fill |
| 844 | * |
| 845 | * A wrapper around sys_fillrect implemented by fbdev core |
| 846 | */ |
| 847 | void drm_fb_helper_sys_fillrect(struct fb_info *info, |
| 848 | const struct fb_fillrect *rect) |
| 849 | { |
| 850 | sys_fillrect(info, rect); |
| 851 | drm_fb_helper_damage(info, rect->dx, rect->dy, rect->width, rect->height); |
| 852 | } |
| 853 | EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); |
| 854 | |
| 855 | /** |
| 856 | * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea |
| 857 | * @info: fbdev registered by the helper |
| 858 | * @area: info about area to copy |
| 859 | * |
| 860 | * A wrapper around sys_copyarea implemented by fbdev core |
| 861 | */ |
| 862 | void drm_fb_helper_sys_copyarea(struct fb_info *info, |
| 863 | const struct fb_copyarea *area) |
| 864 | { |
| 865 | sys_copyarea(info, area); |
| 866 | drm_fb_helper_damage(info, area->dx, area->dy, area->width, area->height); |
| 867 | } |
| 868 | EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); |
| 869 | |
| 870 | /** |
| 871 | * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit |
| 872 | * @info: fbdev registered by the helper |
| 873 | * @image: info about image to blit |
| 874 | * |
| 875 | * A wrapper around sys_imageblit implemented by fbdev core |
| 876 | */ |
| 877 | void drm_fb_helper_sys_imageblit(struct fb_info *info, |
| 878 | const struct fb_image *image) |
| 879 | { |
| 880 | sys_imageblit(info, image); |
| 881 | drm_fb_helper_damage(info, image->dx, image->dy, image->width, image->height); |
| 882 | } |
| 883 | EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); |
| 884 | |
| 885 | /** |
| 886 | * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect |
| 887 | * @info: fbdev registered by the helper |
| 888 | * @rect: info about rectangle to fill |
| 889 | * |
| 890 | * A wrapper around cfb_fillrect implemented by fbdev core |
| 891 | */ |
| 892 | void drm_fb_helper_cfb_fillrect(struct fb_info *info, |
| 893 | const struct fb_fillrect *rect) |
| 894 | { |
| 895 | cfb_fillrect(info, rect); |
| 896 | drm_fb_helper_damage(info, rect->dx, rect->dy, rect->width, rect->height); |
| 897 | } |
| 898 | EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); |
| 899 | |
| 900 | /** |
| 901 | * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea |
| 902 | * @info: fbdev registered by the helper |
| 903 | * @area: info about area to copy |
| 904 | * |
| 905 | * A wrapper around cfb_copyarea implemented by fbdev core |
| 906 | */ |
| 907 | void drm_fb_helper_cfb_copyarea(struct fb_info *info, |
| 908 | const struct fb_copyarea *area) |
| 909 | { |
| 910 | cfb_copyarea(info, area); |
| 911 | drm_fb_helper_damage(info, area->dx, area->dy, area->width, area->height); |
| 912 | } |
| 913 | EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); |
| 914 | |
| 915 | /** |
| 916 | * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit |
| 917 | * @info: fbdev registered by the helper |
| 918 | * @image: info about image to blit |
| 919 | * |
| 920 | * A wrapper around cfb_imageblit implemented by fbdev core |
| 921 | */ |
| 922 | void drm_fb_helper_cfb_imageblit(struct fb_info *info, |
| 923 | const struct fb_image *image) |
| 924 | { |
| 925 | cfb_imageblit(info, image); |
| 926 | drm_fb_helper_damage(info, image->dx, image->dy, image->width, image->height); |
| 927 | } |
| 928 | EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); |
| 929 | |
| 930 | #endif /* __linux__ */ |
| 931 | |
| 932 | /** |
| 933 | * drm_fb_helper_set_suspend - wrapper around fb_set_suspend |
| 934 | * @fb_helper: driver-allocated fbdev helper, can be NULL |
| 935 | * @suspend: whether to suspend or resume |
| 936 | * |
| 937 | * A wrapper around fb_set_suspend implemented by fbdev core. |
| 938 | * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take |
| 939 | * the lock yourself |
| 940 | */ |
| 941 | void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool_Bool suspend) |
| 942 | { |
| 943 | if (fb_helper && fb_helper->fbdev) |
| 944 | fb_set_suspend(fb_helper->fbdev, suspend); |
| 945 | } |
| 946 | EXPORT_SYMBOL(drm_fb_helper_set_suspend); |
| 947 | |
| 948 | /** |
| 949 | * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also |
| 950 | * takes the console lock |
| 951 | * @fb_helper: driver-allocated fbdev helper, can be NULL |
| 952 | * @suspend: whether to suspend or resume |
| 953 | * |
| 954 | * A wrapper around fb_set_suspend() that takes the console lock. If the lock |
| 955 | * isn't available on resume, a worker is tasked with waiting for the lock |
| 956 | * to become available. The console lock can be pretty contented on resume |
| 957 | * due to all the printk activity. |
| 958 | * |
| 959 | * This function can be called multiple times with the same state since |
| 960 | * &fb_info.state is checked to see if fbdev is running or not before locking. |
| 961 | * |
| 962 | * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. |
| 963 | */ |
| 964 | void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, |
| 965 | bool_Bool suspend) |
| 966 | { |
| 967 | #ifdef __linux__ |
| 968 | if (!fb_helper || !fb_helper->fbdev) |
| 969 | return; |
| 970 | |
| 971 | /* make sure there's no pending/ongoing resume */ |
| 972 | flush_work(&fb_helper->resume_work); |
| 973 | |
| 974 | if (suspend) { |
| 975 | if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING0) |
| 976 | return; |
| 977 | |
| 978 | console_lock(); |
| 979 | |
| 980 | } else { |
| 981 | if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING0) |
| 982 | return; |
| 983 | |
| 984 | if (!console_trylock()) { |
| 985 | schedule_work(&fb_helper->resume_work); |
| 986 | return; |
| 987 | } |
| 988 | } |
| 989 | |
| 990 | fb_set_suspend(fb_helper->fbdev, suspend); |
| 991 | console_unlock(); |
| 992 | #endif |
| 993 | } |
| 994 | EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); |
| 995 | |
| 996 | #ifdef __linux__ |
| 997 | |
| 998 | static int setcmap_pseudo_palette(struct fb_cmap *cmap, struct fb_info *info) |
| 999 | { |
| 1000 | u32 *palette = (u32 *)info->pseudo_palette; |
| 1001 | int i; |
| 1002 | |
| 1003 | if (cmap->start + cmap->len > 16) |
| 1004 | return -EINVAL22; |
| 1005 | |
| 1006 | for (i = 0; i < cmap->len; ++i) { |
| 1007 | u16 red = cmap->red[i]; |
| 1008 | u16 green = cmap->green[i]; |
| 1009 | u16 blue = cmap->blue[i]; |
| 1010 | u32 value; |
| 1011 | |
| 1012 | red >>= 16 - info->var.red.length; |
| 1013 | green >>= 16 - info->var.green.length; |
| 1014 | blue >>= 16 - info->var.blue.length; |
| 1015 | value = (red << info->var.red.offset) | |
| 1016 | (green << info->var.green.offset) | |
| 1017 | (blue << info->var.blue.offset); |
| 1018 | if (info->var.transp.length > 0) { |
| 1019 | u32 mask = (1 << info->var.transp.length) - 1; |
| 1020 | |
| 1021 | mask <<= info->var.transp.offset; |
| 1022 | value |= mask; |
| 1023 | } |
| 1024 | palette[cmap->start + i] = value; |
| 1025 | } |
| 1026 | |
| 1027 | return 0; |
| 1028 | } |
| 1029 | |
| 1030 | static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info) |
| 1031 | { |
| 1032 | struct drm_fb_helper *fb_helper = info->par; |
| 1033 | struct drm_mode_set *modeset; |
| 1034 | struct drm_crtc *crtc; |
| 1035 | u16 *r, *g, *b; |
| 1036 | int ret = 0; |
| 1037 | |
| 1038 | drm_modeset_lock_all(fb_helper->dev); |
| 1039 | drm_client_for_each_modeset(modeset, &fb_helper->client)for (({ do { (void)(&(&fb_helper->client)->modeset_mutex ); } while(0); }), modeset = (&fb_helper->client)-> modesets; modeset->crtc; modeset++) { |
| 1040 | crtc = modeset->crtc; |
| 1041 | if (!crtc->funcs->gamma_set || !crtc->gamma_size) { |
| 1042 | ret = -EINVAL22; |
| 1043 | goto out; |
| 1044 | } |
| 1045 | |
| 1046 | if (cmap->start + cmap->len > crtc->gamma_size) { |
| 1047 | ret = -EINVAL22; |
| 1048 | goto out; |
| 1049 | } |
| 1050 | |
| 1051 | r = crtc->gamma_store; |
| 1052 | g = r + crtc->gamma_size; |
| 1053 | b = g + crtc->gamma_size; |
| 1054 | |
| 1055 | memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r))__builtin_memcpy((r + cmap->start), (cmap->red), (cmap-> len * sizeof(*r))); |
| 1056 | memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g))__builtin_memcpy((g + cmap->start), (cmap->green), (cmap ->len * sizeof(*g))); |
| 1057 | memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b))__builtin_memcpy((b + cmap->start), (cmap->blue), (cmap ->len * sizeof(*b))); |
| 1058 | |
| 1059 | ret = crtc->funcs->gamma_set(crtc, r, g, b, |
| 1060 | crtc->gamma_size, NULL((void *)0)); |
| 1061 | if (ret) |
| 1062 | goto out; |
| 1063 | } |
| 1064 | out: |
| 1065 | drm_modeset_unlock_all(fb_helper->dev); |
| 1066 | |
| 1067 | return ret; |
| 1068 | } |
| 1069 | |
| 1070 | static struct drm_property_blob *setcmap_new_gamma_lut(struct drm_crtc *crtc, |
| 1071 | struct fb_cmap *cmap) |
| 1072 | { |
| 1073 | struct drm_device *dev = crtc->dev; |
| 1074 | struct drm_property_blob *gamma_lut; |
| 1075 | struct drm_color_lut *lut; |
| 1076 | int size = crtc->gamma_size; |
| 1077 | int i; |
| 1078 | |
| 1079 | if (!size || cmap->start + cmap->len > size) |
| 1080 | return ERR_PTR(-EINVAL22); |
| 1081 | |
| 1082 | gamma_lut = drm_property_create_blob(dev, sizeof(*lut) * size, NULL((void *)0)); |
| 1083 | if (IS_ERR(gamma_lut)) |
| 1084 | return gamma_lut; |
| 1085 | |
| 1086 | lut = gamma_lut->data; |
| 1087 | if (cmap->start || cmap->len != size) { |
| 1088 | u16 *r = crtc->gamma_store; |
| 1089 | u16 *g = r + crtc->gamma_size; |
| 1090 | u16 *b = g + crtc->gamma_size; |
| 1091 | |
| 1092 | for (i = 0; i < cmap->start; i++) { |
| 1093 | lut[i].red = r[i]; |
| 1094 | lut[i].green = g[i]; |
| 1095 | lut[i].blue = b[i]; |
| 1096 | } |
| 1097 | for (i = cmap->start + cmap->len; i < size; i++) { |
| 1098 | lut[i].red = r[i]; |
| 1099 | lut[i].green = g[i]; |
| 1100 | lut[i].blue = b[i]; |
| 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | for (i = 0; i < cmap->len; i++) { |
| 1105 | lut[cmap->start + i].red = cmap->red[i]; |
| 1106 | lut[cmap->start + i].green = cmap->green[i]; |
| 1107 | lut[cmap->start + i].blue = cmap->blue[i]; |
| 1108 | } |
| 1109 | |
| 1110 | return gamma_lut; |
| 1111 | } |
| 1112 | |
| 1113 | static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info) |
| 1114 | { |
| 1115 | struct drm_fb_helper *fb_helper = info->par; |
| 1116 | struct drm_device *dev = fb_helper->dev; |
| 1117 | struct drm_property_blob *gamma_lut = NULL((void *)0); |
| 1118 | struct drm_modeset_acquire_ctx ctx; |
| 1119 | struct drm_crtc_state *crtc_state; |
| 1120 | struct drm_atomic_state *state; |
| 1121 | struct drm_mode_set *modeset; |
| 1122 | struct drm_crtc *crtc; |
| 1123 | u16 *r, *g, *b; |
| 1124 | bool_Bool replaced; |
| 1125 | int ret = 0; |
| 1126 | |
| 1127 | drm_modeset_acquire_init(&ctx, 0); |
| 1128 | |
| 1129 | state = drm_atomic_state_alloc(dev); |
| 1130 | if (!state) { |
| 1131 | ret = -ENOMEM12; |
| 1132 | goto out_ctx; |
| 1133 | } |
| 1134 | |
| 1135 | state->acquire_ctx = &ctx; |
| 1136 | retry: |
| 1137 | drm_client_for_each_modeset(modeset, &fb_helper->client)for (({ do { (void)(&(&fb_helper->client)->modeset_mutex ); } while(0); }), modeset = (&fb_helper->client)-> modesets; modeset->crtc; modeset++) { |
| 1138 | crtc = modeset->crtc; |
| 1139 | |
| 1140 | if (!gamma_lut) |
| 1141 | gamma_lut = setcmap_new_gamma_lut(crtc, cmap); |
| 1142 | if (IS_ERR(gamma_lut)) { |
| 1143 | ret = PTR_ERR(gamma_lut); |
| 1144 | gamma_lut = NULL((void *)0); |
| 1145 | goto out_state; |
| 1146 | } |
| 1147 | |
| 1148 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
| 1149 | if (IS_ERR(crtc_state)) { |
| 1150 | ret = PTR_ERR(crtc_state); |
| 1151 | goto out_state; |
| 1152 | } |
| 1153 | |
| 1154 | /* |
| 1155 | * FIXME: This always uses gamma_lut. Some HW have only |
| 1156 | * degamma_lut, in which case we should reset gamma_lut and set |
| 1157 | * degamma_lut. See drm_crtc_legacy_gamma_set(). |
| 1158 | */ |
| 1159 | replaced = drm_property_replace_blob(&crtc_state->degamma_lut, |
| 1160 | NULL((void *)0)); |
| 1161 | replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL((void *)0)); |
| 1162 | replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, |
| 1163 | gamma_lut); |
| 1164 | crtc_state->color_mgmt_changed |= replaced; |
| 1165 | } |
| 1166 | |
| 1167 | ret = drm_atomic_commit(state); |
| 1168 | if (ret) |
| 1169 | goto out_state; |
| 1170 | |
| 1171 | drm_client_for_each_modeset(modeset, &fb_helper->client)for (({ do { (void)(&(&fb_helper->client)->modeset_mutex ); } while(0); }), modeset = (&fb_helper->client)-> modesets; modeset->crtc; modeset++) { |
| 1172 | crtc = modeset->crtc; |
| 1173 | |
| 1174 | r = crtc->gamma_store; |
| 1175 | g = r + crtc->gamma_size; |
| 1176 | b = g + crtc->gamma_size; |
| 1177 | |
| 1178 | memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r))__builtin_memcpy((r + cmap->start), (cmap->red), (cmap-> len * sizeof(*r))); |
| 1179 | memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g))__builtin_memcpy((g + cmap->start), (cmap->green), (cmap ->len * sizeof(*g))); |
| 1180 | memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b))__builtin_memcpy((b + cmap->start), (cmap->blue), (cmap ->len * sizeof(*b))); |
| 1181 | } |
| 1182 | |
| 1183 | out_state: |
| 1184 | if (ret == -EDEADLK11) |
| 1185 | goto backoff; |
| 1186 | |
| 1187 | drm_property_blob_put(gamma_lut); |
| 1188 | drm_atomic_state_put(state); |
| 1189 | out_ctx: |
| 1190 | drm_modeset_drop_locks(&ctx); |
| 1191 | drm_modeset_acquire_fini(&ctx); |
| 1192 | |
| 1193 | return ret; |
| 1194 | |
| 1195 | backoff: |
| 1196 | drm_atomic_state_clear(state); |
| 1197 | drm_modeset_backoff(&ctx); |
| 1198 | goto retry; |
| 1199 | } |
| 1200 | |
| 1201 | /** |
| 1202 | * drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap |
| 1203 | * @cmap: cmap to set |
| 1204 | * @info: fbdev registered by the helper |
| 1205 | */ |
| 1206 | int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
| 1207 | { |
| 1208 | struct drm_fb_helper *fb_helper = info->par; |
| 1209 | struct drm_device *dev = fb_helper->dev; |
| 1210 | int ret; |
| 1211 | |
| 1212 | if (oops_in_progress_in_dbg_master()) |
| 1213 | return -EBUSY16; |
| 1214 | |
| 1215 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 1216 | |
| 1217 | if (!drm_master_internal_acquire(dev)) { |
| 1218 | ret = -EBUSY16; |
| 1219 | goto unlock; |
| 1220 | } |
| 1221 | |
| 1222 | mutex_lock(&fb_helper->client.modeset_mutex)rw_enter_write(&fb_helper->client.modeset_mutex); |
| 1223 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) |
| 1224 | ret = setcmap_pseudo_palette(cmap, info); |
| 1225 | else if (drm_drv_uses_atomic_modeset(fb_helper->dev)) |
| 1226 | ret = setcmap_atomic(cmap, info); |
| 1227 | else |
| 1228 | ret = setcmap_legacy(cmap, info); |
| 1229 | mutex_unlock(&fb_helper->client.modeset_mutex)rw_exit_write(&fb_helper->client.modeset_mutex); |
| 1230 | |
| 1231 | drm_master_internal_release(dev); |
| 1232 | unlock: |
| 1233 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 1234 | |
| 1235 | return ret; |
| 1236 | } |
| 1237 | EXPORT_SYMBOL(drm_fb_helper_setcmap); |
| 1238 | |
| 1239 | /** |
| 1240 | * drm_fb_helper_ioctl - legacy ioctl implementation |
| 1241 | * @info: fbdev registered by the helper |
| 1242 | * @cmd: ioctl command |
| 1243 | * @arg: ioctl argument |
| 1244 | * |
| 1245 | * A helper to implement the standard fbdev ioctl. Only |
| 1246 | * FBIO_WAITFORVSYNC is implemented for now. |
| 1247 | */ |
| 1248 | int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, |
| 1249 | unsigned long arg) |
| 1250 | { |
| 1251 | struct drm_fb_helper *fb_helper = info->par; |
| 1252 | struct drm_device *dev = fb_helper->dev; |
| 1253 | struct drm_crtc *crtc; |
| 1254 | int ret = 0; |
| 1255 | |
| 1256 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 1257 | if (!drm_master_internal_acquire(dev)) { |
| 1258 | ret = -EBUSY16; |
| 1259 | goto unlock; |
| 1260 | } |
| 1261 | |
| 1262 | switch (cmd) { |
| 1263 | case FBIO_WAITFORVSYNC: |
| 1264 | /* |
| 1265 | * Only consider the first CRTC. |
| 1266 | * |
| 1267 | * This ioctl is supposed to take the CRTC number as |
| 1268 | * an argument, but in fbdev times, what that number |
| 1269 | * was supposed to be was quite unclear, different |
| 1270 | * drivers were passing that argument differently |
| 1271 | * (some by reference, some by value), and most of the |
| 1272 | * userspace applications were just hardcoding 0 as an |
| 1273 | * argument. |
| 1274 | * |
| 1275 | * The first CRTC should be the integrated panel on |
| 1276 | * most drivers, so this is the best choice we can |
| 1277 | * make. If we're not smart enough here, one should |
| 1278 | * just consider switch the userspace to KMS. |
| 1279 | */ |
| 1280 | crtc = fb_helper->client.modesets[0].crtc; |
| 1281 | |
| 1282 | /* |
| 1283 | * Only wait for a vblank event if the CRTC is |
| 1284 | * enabled, otherwise just don't do anythintg, |
| 1285 | * not even report an error. |
| 1286 | */ |
| 1287 | ret = drm_crtc_vblank_get(crtc); |
| 1288 | if (!ret) { |
| 1289 | drm_crtc_wait_one_vblank(crtc); |
| 1290 | drm_crtc_vblank_put(crtc); |
| 1291 | } |
| 1292 | |
| 1293 | ret = 0; |
| 1294 | break; |
| 1295 | default: |
| 1296 | ret = -ENOTTY25; |
| 1297 | } |
| 1298 | |
| 1299 | drm_master_internal_release(dev); |
| 1300 | unlock: |
| 1301 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 1302 | return ret; |
| 1303 | } |
| 1304 | EXPORT_SYMBOL(drm_fb_helper_ioctl); |
| 1305 | |
| 1306 | static bool_Bool drm_fb_pixel_format_equal(const struct fb_var_screeninfo *var_1, |
| 1307 | const struct fb_var_screeninfo *var_2) |
| 1308 | { |
| 1309 | return var_1->bits_per_pixel == var_2->bits_per_pixel && |
| 1310 | var_1->grayscale == var_2->grayscale && |
| 1311 | var_1->red.offset == var_2->red.offset && |
| 1312 | var_1->red.length == var_2->red.length && |
| 1313 | var_1->red.msb_right == var_2->red.msb_right && |
| 1314 | var_1->green.offset == var_2->green.offset && |
| 1315 | var_1->green.length == var_2->green.length && |
| 1316 | var_1->green.msb_right == var_2->green.msb_right && |
| 1317 | var_1->blue.offset == var_2->blue.offset && |
| 1318 | var_1->blue.length == var_2->blue.length && |
| 1319 | var_1->blue.msb_right == var_2->blue.msb_right && |
| 1320 | var_1->transp.offset == var_2->transp.offset && |
| 1321 | var_1->transp.length == var_2->transp.length && |
| 1322 | var_1->transp.msb_right == var_2->transp.msb_right; |
| 1323 | } |
| 1324 | |
| 1325 | static void drm_fb_helper_fill_pixel_fmt(struct fb_var_screeninfo *var, |
| 1326 | const struct drm_format_info *format) |
| 1327 | { |
| 1328 | u8 depth = format->depth; |
| 1329 | |
| 1330 | if (format->is_color_indexed) { |
| 1331 | var->red.offset = 0; |
| 1332 | var->green.offset = 0; |
| 1333 | var->blue.offset = 0; |
| 1334 | var->red.length = depth; |
| 1335 | var->green.length = depth; |
| 1336 | var->blue.length = depth; |
| 1337 | var->transp.offset = 0; |
| 1338 | var->transp.length = 0; |
| 1339 | return; |
| 1340 | } |
| 1341 | |
| 1342 | switch (depth) { |
| 1343 | case 15: |
| 1344 | var->red.offset = 10; |
| 1345 | var->green.offset = 5; |
| 1346 | var->blue.offset = 0; |
| 1347 | var->red.length = 5; |
| 1348 | var->green.length = 5; |
| 1349 | var->blue.length = 5; |
| 1350 | var->transp.offset = 15; |
| 1351 | var->transp.length = 1; |
| 1352 | break; |
| 1353 | case 16: |
| 1354 | var->red.offset = 11; |
| 1355 | var->green.offset = 5; |
| 1356 | var->blue.offset = 0; |
| 1357 | var->red.length = 5; |
| 1358 | var->green.length = 6; |
| 1359 | var->blue.length = 5; |
| 1360 | var->transp.offset = 0; |
| 1361 | break; |
| 1362 | case 24: |
| 1363 | var->red.offset = 16; |
| 1364 | var->green.offset = 8; |
| 1365 | var->blue.offset = 0; |
| 1366 | var->red.length = 8; |
| 1367 | var->green.length = 8; |
| 1368 | var->blue.length = 8; |
| 1369 | var->transp.offset = 0; |
| 1370 | var->transp.length = 0; |
| 1371 | break; |
| 1372 | case 32: |
| 1373 | var->red.offset = 16; |
| 1374 | var->green.offset = 8; |
| 1375 | var->blue.offset = 0; |
| 1376 | var->red.length = 8; |
| 1377 | var->green.length = 8; |
| 1378 | var->blue.length = 8; |
| 1379 | var->transp.offset = 24; |
| 1380 | var->transp.length = 8; |
| 1381 | break; |
| 1382 | default: |
| 1383 | break; |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /** |
| 1388 | * drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var |
| 1389 | * @var: screeninfo to check |
| 1390 | * @info: fbdev registered by the helper |
| 1391 | */ |
| 1392 | int drm_fb_helper_check_var(struct fb_var_screeninfo *var, |
| 1393 | struct fb_info *info) |
| 1394 | { |
| 1395 | struct drm_fb_helper *fb_helper = info->par; |
| 1396 | struct drm_framebuffer *fb = fb_helper->fb; |
| 1397 | const struct drm_format_info *format = fb->format; |
| 1398 | struct drm_device *dev = fb_helper->dev; |
| 1399 | unsigned int bpp; |
| 1400 | |
| 1401 | if (in_dbg_master()) |
| 1402 | return -EINVAL22; |
| 1403 | |
| 1404 | if (var->pixclock != 0) { |
| 1405 | drm_dbg_kms(dev, "fbdev emulation doesn't support changing the pixel clock, value of pixclock is ignored\n")__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fbdev emulation doesn't support changing the pixel clock, value of pixclock is ignored\n" ); |
| 1406 | var->pixclock = 0; |
| 1407 | } |
| 1408 | |
| 1409 | switch (format->format) { |
| 1410 | case DRM_FORMAT_C1((__u32)('C') | ((__u32)('1') << 8) | ((__u32)(' ') << 16) | ((__u32)(' ') << 24)): |
| 1411 | case DRM_FORMAT_C2((__u32)('C') | ((__u32)('2') << 8) | ((__u32)(' ') << 16) | ((__u32)(' ') << 24)): |
| 1412 | case DRM_FORMAT_C4((__u32)('C') | ((__u32)('4') << 8) | ((__u32)(' ') << 16) | ((__u32)(' ') << 24)): |
| 1413 | /* supported format with sub-byte pixels */ |
| 1414 | break; |
| 1415 | |
| 1416 | default: |
| 1417 | if ((drm_format_info_block_width(format, 0) > 1) || |
| 1418 | (drm_format_info_block_height(format, 0) > 1)) |
| 1419 | return -EINVAL22; |
| 1420 | break; |
| 1421 | } |
| 1422 | |
| 1423 | /* |
| 1424 | * Changes struct fb_var_screeninfo are currently not pushed back |
| 1425 | * to KMS, hence fail if different settings are requested. |
| 1426 | */ |
| 1427 | bpp = drm_format_info_bpp(format, 0); |
| 1428 | if (var->bits_per_pixel > bpp || |
| 1429 | var->xres > fb->width || var->yres > fb->height || |
| 1430 | var->xres_virtual > fb->width || var->yres_virtual > fb->height) { |
| 1431 | drm_dbg_kms(dev, "fb requested width/height/bpp can't fit in current fb "__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var-> xres, var->yres, var->bits_per_pixel, var->xres_virtual , var->yres_virtual, fb->width, fb->height, bpp) |
| 1432 | "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var-> xres, var->yres, var->bits_per_pixel, var->xres_virtual , var->yres_virtual, fb->width, fb->height, bpp) |
| 1433 | var->xres, var->yres, var->bits_per_pixel,__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var-> xres, var->yres, var->bits_per_pixel, var->xres_virtual , var->yres_virtual, fb->width, fb->height, bpp) |
| 1434 | var->xres_virtual, var->yres_virtual,__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var-> xres, var->yres, var->bits_per_pixel, var->xres_virtual , var->yres_virtual, fb->width, fb->height, bpp) |
| 1435 | fb->width, fb->height, bpp)__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var-> xres, var->yres, var->bits_per_pixel, var->xres_virtual , var->yres_virtual, fb->width, fb->height, bpp); |
| 1436 | return -EINVAL22; |
| 1437 | } |
| 1438 | |
| 1439 | var->xres_virtual = fb->width; |
| 1440 | var->yres_virtual = fb->height; |
| 1441 | |
| 1442 | /* |
| 1443 | * Workaround for SDL 1.2, which is known to be setting all pixel format |
| 1444 | * fields values to zero in some cases. We treat this situation as a |
| 1445 | * kind of "use some reasonable autodetected values". |
| 1446 | */ |
| 1447 | if (!var->red.offset && !var->green.offset && |
| 1448 | !var->blue.offset && !var->transp.offset && |
| 1449 | !var->red.length && !var->green.length && |
| 1450 | !var->blue.length && !var->transp.length && |
| 1451 | !var->red.msb_right && !var->green.msb_right && |
| 1452 | !var->blue.msb_right && !var->transp.msb_right) { |
| 1453 | drm_fb_helper_fill_pixel_fmt(var, format); |
| 1454 | } |
| 1455 | |
| 1456 | /* |
| 1457 | * Likewise, bits_per_pixel should be rounded up to a supported value. |
| 1458 | */ |
| 1459 | var->bits_per_pixel = bpp; |
| 1460 | |
| 1461 | /* |
| 1462 | * drm fbdev emulation doesn't support changing the pixel format at all, |
| 1463 | * so reject all pixel format changing requests. |
| 1464 | */ |
| 1465 | if (!drm_fb_pixel_format_equal(var, &info->var)) { |
| 1466 | drm_dbg_kms(dev, "fbdev emulation doesn't support changing the pixel format\n")__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "fbdev emulation doesn't support changing the pixel format\n" ); |
| 1467 | return -EINVAL22; |
| 1468 | } |
| 1469 | |
| 1470 | return 0; |
| 1471 | } |
| 1472 | EXPORT_SYMBOL(drm_fb_helper_check_var); |
| 1473 | |
| 1474 | #endif /* __linux__ */ |
| 1475 | |
| 1476 | /** |
| 1477 | * drm_fb_helper_set_par - implementation for &fb_ops.fb_set_par |
| 1478 | * @info: fbdev registered by the helper |
| 1479 | * |
| 1480 | * This will let fbcon do the mode init and is called at initialization time by |
| 1481 | * the fbdev core when registering the driver, and later on through the hotplug |
| 1482 | * callback. |
| 1483 | */ |
| 1484 | int drm_fb_helper_set_par(struct fb_info *info) |
| 1485 | { |
| 1486 | struct drm_fb_helper *fb_helper = info->par; |
| 1487 | struct fb_var_screeninfo *var = &info->var; |
| 1488 | bool_Bool force; |
| 1489 | |
| 1490 | if (oops_in_progress_in_dbg_master()) |
| 1491 | return -EBUSY16; |
| 1492 | |
| 1493 | if (var->pixclock != 0) { |
| 1494 | drm_err(fb_helper->dev, "PIXEL CLOCK SET\n")printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "PIXEL CLOCK SET\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__); |
| 1495 | return -EINVAL22; |
| 1496 | } |
| 1497 | |
| 1498 | /* |
| 1499 | * Normally we want to make sure that a kms master takes precedence over |
| 1500 | * fbdev, to avoid fbdev flickering and occasionally stealing the |
| 1501 | * display status. But Xorg first sets the vt back to text mode using |
| 1502 | * the KDSET IOCTL with KD_TEXT, and only after that drops the master |
| 1503 | * status when exiting. |
| 1504 | * |
| 1505 | * In the past this was caught by drm_fb_helper_lastclose(), but on |
| 1506 | * modern systems where logind always keeps a drm fd open to orchestrate |
| 1507 | * the vt switching, this doesn't work. |
| 1508 | * |
| 1509 | * To not break the userspace ABI we have this special case here, which |
| 1510 | * is only used for the above case. Everything else uses the normal |
| 1511 | * commit function, which ensures that we never steal the display from |
| 1512 | * an active drm master. |
| 1513 | */ |
| 1514 | #ifdef __linux__ |
| 1515 | force = var->activate & FB_ACTIVATE_KD_TEXT; |
| 1516 | #else |
| 1517 | force = true1; |
| 1518 | #endif |
| 1519 | |
| 1520 | __drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper, force); |
| 1521 | |
| 1522 | return 0; |
| 1523 | } |
| 1524 | EXPORT_SYMBOL(drm_fb_helper_set_par); |
| 1525 | |
| 1526 | #ifdef notyet |
| 1527 | static void pan_set(struct drm_fb_helper *fb_helper, int x, int y) |
| 1528 | { |
| 1529 | struct drm_mode_set *mode_set; |
| 1530 | |
| 1531 | mutex_lock(&fb_helper->client.modeset_mutex)rw_enter_write(&fb_helper->client.modeset_mutex); |
| 1532 | drm_client_for_each_modeset(mode_set, &fb_helper->client)for (({ do { (void)(&(&fb_helper->client)->modeset_mutex ); } while(0); }), mode_set = (&fb_helper->client)-> modesets; mode_set->crtc; mode_set++) { |
| 1533 | mode_set->x = x; |
| 1534 | mode_set->y = y; |
| 1535 | } |
| 1536 | mutex_unlock(&fb_helper->client.modeset_mutex)rw_exit_write(&fb_helper->client.modeset_mutex); |
| 1537 | } |
| 1538 | #endif |
| 1539 | |
| 1540 | static int pan_display_atomic(struct fb_var_screeninfo *var, |
| 1541 | struct fb_info *info) |
| 1542 | { |
| 1543 | STUB()do { printf("%s: stub\n", __func__); } while(0); |
| 1544 | return -ENOSYS78; |
| 1545 | #ifdef notyet |
| 1546 | struct drm_fb_helper *fb_helper = info->par; |
| 1547 | int ret; |
| 1548 | |
| 1549 | pan_set(fb_helper, var->xoffset, var->yoffset); |
| 1550 | |
| 1551 | ret = drm_client_modeset_commit_locked(&fb_helper->client); |
| 1552 | if (!ret) { |
| 1553 | info->var.xoffset = var->xoffset; |
| 1554 | info->var.yoffset = var->yoffset; |
| 1555 | } else |
| 1556 | pan_set(fb_helper, info->var.xoffset, info->var.yoffset); |
| 1557 | |
| 1558 | return ret; |
| 1559 | #endif |
| 1560 | } |
| 1561 | |
| 1562 | static int pan_display_legacy(struct fb_var_screeninfo *var, |
| 1563 | struct fb_info *info) |
| 1564 | { |
| 1565 | STUB()do { printf("%s: stub\n", __func__); } while(0); |
| 1566 | return -ENOSYS78; |
| 1567 | #ifdef notyet |
| 1568 | struct drm_fb_helper *fb_helper = info->par; |
| 1569 | struct drm_client_dev *client = &fb_helper->client; |
| 1570 | struct drm_mode_set *modeset; |
| 1571 | int ret = 0; |
| 1572 | |
| 1573 | mutex_lock(&client->modeset_mutex)rw_enter_write(&client->modeset_mutex); |
| 1574 | drm_modeset_lock_all(fb_helper->dev); |
| 1575 | drm_client_for_each_modeset(modeset, client)for (({ do { (void)(&(client)->modeset_mutex); } while (0); }), modeset = (client)->modesets; modeset->crtc; modeset ++) { |
| 1576 | modeset->x = var->xoffset; |
| 1577 | modeset->y = var->yoffset; |
| 1578 | |
| 1579 | if (modeset->num_connectors) { |
| 1580 | ret = drm_mode_set_config_internal(modeset); |
| 1581 | if (!ret) { |
| 1582 | info->var.xoffset = var->xoffset; |
| 1583 | info->var.yoffset = var->yoffset; |
| 1584 | } |
| 1585 | } |
| 1586 | } |
| 1587 | drm_modeset_unlock_all(fb_helper->dev); |
| 1588 | mutex_unlock(&client->modeset_mutex)rw_exit_write(&client->modeset_mutex); |
| 1589 | |
| 1590 | return ret; |
| 1591 | #endif |
| 1592 | } |
| 1593 | |
| 1594 | /** |
| 1595 | * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display |
| 1596 | * @var: updated screen information |
| 1597 | * @info: fbdev registered by the helper |
| 1598 | */ |
| 1599 | int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, |
| 1600 | struct fb_info *info) |
| 1601 | { |
| 1602 | struct drm_fb_helper *fb_helper = info->par; |
| 1603 | struct drm_device *dev = fb_helper->dev; |
| 1604 | int ret; |
| 1605 | |
| 1606 | if (oops_in_progress_in_dbg_master()) |
| 1607 | return -EBUSY16; |
| 1608 | |
| 1609 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 1610 | if (!drm_master_internal_acquire(dev)) { |
| 1611 | ret = -EBUSY16; |
| 1612 | goto unlock; |
| 1613 | } |
| 1614 | |
| 1615 | if (drm_drv_uses_atomic_modeset(dev)) |
| 1616 | ret = pan_display_atomic(var, info); |
| 1617 | else |
| 1618 | ret = pan_display_legacy(var, info); |
| 1619 | |
| 1620 | drm_master_internal_release(dev); |
| 1621 | unlock: |
| 1622 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 1623 | |
| 1624 | return ret; |
| 1625 | } |
| 1626 | EXPORT_SYMBOL(drm_fb_helper_pan_display); |
| 1627 | |
| 1628 | /* |
| 1629 | * Allocates the backing storage and sets up the fbdev info structure through |
| 1630 | * the ->fb_probe callback. |
| 1631 | */ |
| 1632 | static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, |
| 1633 | int preferred_bpp) |
| 1634 | { |
| 1635 | struct drm_client_dev *client = &fb_helper->client; |
| 1636 | struct drm_device *dev = fb_helper->dev; |
| 1637 | struct drm_mode_config *config = &dev->mode_config; |
| 1638 | int ret = 0; |
| 1639 | int crtc_count = 0; |
| 1640 | struct drm_connector_list_iter conn_iter; |
| 1641 | struct drm_fb_helper_surface_size sizes; |
| 1642 | struct drm_connector *connector; |
| 1643 | struct drm_mode_set *mode_set; |
| 1644 | int best_depth = 0; |
| 1645 | |
| 1646 | memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size))__builtin_memset((&sizes), (0), (sizeof(struct drm_fb_helper_surface_size ))); |
| 1647 | sizes.surface_depth = 24; |
| 1648 | sizes.surface_bpp = 32; |
| 1649 | sizes.fb_width = (u32)-1; |
| 1650 | sizes.fb_height = (u32)-1; |
| 1651 | |
| 1652 | /* |
| 1653 | * If driver picks 8 or 16 by default use that for both depth/bpp |
| 1654 | * to begin with |
| 1655 | */ |
| 1656 | if (preferred_bpp != sizes.surface_bpp) |
| 1657 | sizes.surface_depth = sizes.surface_bpp = preferred_bpp; |
| 1658 | |
| 1659 | drm_connector_list_iter_begin(fb_helper->dev, &conn_iter); |
| 1660 | drm_client_for_each_connector_iter(connector, &conn_iter)while ((connector = drm_connector_list_iter_next(&conn_iter ))) if (connector->connector_type != 18) { |
| 1661 | struct drm_cmdline_mode *cmdline_mode; |
| 1662 | |
| 1663 | cmdline_mode = &connector->cmdline_mode; |
| 1664 | |
| 1665 | if (cmdline_mode->bpp_specified) { |
| 1666 | switch (cmdline_mode->bpp) { |
| 1667 | case 8: |
| 1668 | sizes.surface_depth = sizes.surface_bpp = 8; |
| 1669 | break; |
| 1670 | case 15: |
| 1671 | sizes.surface_depth = 15; |
| 1672 | sizes.surface_bpp = 16; |
| 1673 | break; |
| 1674 | case 16: |
| 1675 | sizes.surface_depth = sizes.surface_bpp = 16; |
| 1676 | break; |
| 1677 | case 24: |
| 1678 | sizes.surface_depth = sizes.surface_bpp = 24; |
| 1679 | break; |
| 1680 | case 32: |
| 1681 | sizes.surface_depth = 24; |
| 1682 | sizes.surface_bpp = 32; |
| 1683 | break; |
| 1684 | } |
| 1685 | break; |
| 1686 | } |
| 1687 | } |
| 1688 | drm_connector_list_iter_end(&conn_iter); |
| 1689 | |
| 1690 | /* |
| 1691 | * If we run into a situation where, for example, the primary plane |
| 1692 | * supports RGBA5551 (16 bpp, depth 15) but not RGB565 (16 bpp, depth |
| 1693 | * 16) we need to scale down the depth of the sizes we request. |
| 1694 | */ |
| 1695 | mutex_lock(&client->modeset_mutex)rw_enter_write(&client->modeset_mutex); |
| 1696 | drm_client_for_each_modeset(mode_set, client)for (({ do { (void)(&(client)->modeset_mutex); } while (0); }), mode_set = (client)->modesets; mode_set->crtc; mode_set++) { |
| 1697 | struct drm_crtc *crtc = mode_set->crtc; |
| 1698 | struct drm_plane *plane = crtc->primary; |
| 1699 | int j; |
| 1700 | |
| 1701 | drm_dbg_kms(dev, "test CRTC %u primary plane\n", drm_crtc_index(crtc))__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "test CRTC %u primary plane\n", drm_crtc_index (crtc)); |
| 1702 | |
| 1703 | for (j = 0; j < plane->format_count; j++) { |
| 1704 | const struct drm_format_info *fmt; |
| 1705 | |
| 1706 | fmt = drm_format_info(plane->format_types[j]); |
| 1707 | |
| 1708 | /* |
| 1709 | * Do not consider YUV or other complicated formats |
| 1710 | * for framebuffers. This means only legacy formats |
| 1711 | * are supported (fmt->depth is a legacy field) but |
| 1712 | * the framebuffer emulation can only deal with such |
| 1713 | * formats, specifically RGB/BGA formats. |
| 1714 | */ |
| 1715 | if (fmt->depth == 0) |
| 1716 | continue; |
| 1717 | |
| 1718 | /* We found a perfect fit, great */ |
| 1719 | if (fmt->depth == sizes.surface_depth) { |
| 1720 | best_depth = fmt->depth; |
| 1721 | break; |
| 1722 | } |
| 1723 | |
| 1724 | /* Skip depths above what we're looking for */ |
| 1725 | if (fmt->depth > sizes.surface_depth) |
| 1726 | continue; |
| 1727 | |
| 1728 | /* Best depth found so far */ |
| 1729 | if (fmt->depth > best_depth) |
| 1730 | best_depth = fmt->depth; |
| 1731 | } |
| 1732 | } |
| 1733 | if (sizes.surface_depth != best_depth && best_depth) { |
| 1734 | drm_info(dev, "requested bpp %d, scaled depth down to %d",do { } while(0) |
| 1735 | sizes.surface_bpp, best_depth)do { } while(0); |
| 1736 | sizes.surface_depth = best_depth; |
| 1737 | } |
| 1738 | |
| 1739 | /* first up get a count of crtcs now in use and new min/maxes width/heights */ |
| 1740 | crtc_count = 0; |
| 1741 | drm_client_for_each_modeset(mode_set, client)for (({ do { (void)(&(client)->modeset_mutex); } while (0); }), mode_set = (client)->modesets; mode_set->crtc; mode_set++) { |
| 1742 | struct drm_display_mode *desired_mode; |
| 1743 | int x, y, j; |
| 1744 | /* in case of tile group, are we the last tile vert or horiz? |
| 1745 | * If no tile group you are always the last one both vertically |
| 1746 | * and horizontally |
| 1747 | */ |
| 1748 | bool_Bool lastv = true1, lasth = true1; |
| 1749 | |
| 1750 | desired_mode = mode_set->mode; |
| 1751 | |
| 1752 | if (!desired_mode) |
| 1753 | continue; |
| 1754 | |
| 1755 | crtc_count++; |
| 1756 | |
| 1757 | x = mode_set->x; |
| 1758 | y = mode_set->y; |
| 1759 | |
| 1760 | sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width)({ u32 __max_a = (desired_mode->hdisplay + x); u32 __max_b = (sizes.surface_width); __max_a > __max_b ? __max_a : __max_b ; }); |
| 1761 | sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height)({ u32 __max_a = (desired_mode->vdisplay + y); u32 __max_b = (sizes.surface_height); __max_a > __max_b ? __max_a : __max_b ; }); |
| 1762 | |
| 1763 | for (j = 0; j < mode_set->num_connectors; j++) { |
| 1764 | struct drm_connector *connector = mode_set->connectors[j]; |
| 1765 | |
| 1766 | if (connector->has_tile && |
| 1767 | desired_mode->hdisplay == connector->tile_h_size && |
| 1768 | desired_mode->vdisplay == connector->tile_v_size) { |
| 1769 | lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); |
| 1770 | lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); |
| 1771 | /* cloning to multiple tiles is just crazy-talk, so: */ |
| 1772 | break; |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | if (lasth) |
| 1777 | sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width)({ u32 __min_a = (desired_mode->hdisplay + x); u32 __min_b = (sizes.fb_width); __min_a < __min_b ? __min_a : __min_b ; }); |
| 1778 | if (lastv) |
| 1779 | sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height)({ u32 __min_a = (desired_mode->vdisplay + y); u32 __min_b = (sizes.fb_height); __min_a < __min_b ? __min_a : __min_b ; }); |
| 1780 | } |
| 1781 | mutex_unlock(&client->modeset_mutex)rw_exit_write(&client->modeset_mutex); |
| 1782 | |
| 1783 | if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { |
| 1784 | #ifdef __linux__ |
| 1785 | drm_info(dev, "Cannot find any crtc or sizes\n")do { } while(0); |
| 1786 | |
| 1787 | /* First time: disable all crtc's.. */ |
| 1788 | if (!fb_helper->deferred_setup) |
| 1789 | drm_client_modeset_commit(client); |
| 1790 | return -EAGAIN35; |
| 1791 | #else |
| 1792 | drm_info(dev, "Cannot find any crtc or sizes - going 1024x768\n")do { } while(0); |
| 1793 | sizes.fb_width = sizes.surface_width = 1024; |
| 1794 | sizes.fb_height = sizes.surface_height = 768; |
| 1795 | #endif |
| 1796 | } |
| 1797 | |
| 1798 | /* Handle our overallocation */ |
| 1799 | sizes.surface_height *= drm_fbdev_overalloc; |
| 1800 | sizes.surface_height /= 100; |
| 1801 | if (sizes.surface_height > config->max_height) { |
| 1802 | drm_dbg_kms(dev, "Fbdev over-allocation too large; clamping height to %d\n",__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "Fbdev over-allocation too large; clamping height to %d\n" , config->max_height) |
| 1803 | config->max_height)__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "Fbdev over-allocation too large; clamping height to %d\n" , config->max_height); |
| 1804 | sizes.surface_height = config->max_height; |
| 1805 | } |
| 1806 | |
| 1807 | /* push down into drivers */ |
| 1808 | ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); |
| 1809 | if (ret < 0) |
| 1810 | return ret; |
| 1811 | |
| 1812 | #ifdef __linux__ |
| 1813 | strcpy(fb_helper->fb->comm, "[fbcon]"); |
| 1814 | #else |
| 1815 | strlcpy(fb_helper->fb->comm, "[fbcon]", sizeof(fb_helper->fb->comm)); |
| 1816 | #endif |
| 1817 | return 0; |
| 1818 | } |
| 1819 | |
| 1820 | #ifdef __linux__ |
| 1821 | |
| 1822 | static void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, |
| 1823 | bool_Bool is_color_indexed) |
| 1824 | { |
| 1825 | info->fix.type = FB_TYPE_PACKED_PIXELS; |
| 1826 | info->fix.visual = is_color_indexed ? FB_VISUAL_PSEUDOCOLOR |
| 1827 | : FB_VISUAL_TRUECOLOR; |
| 1828 | info->fix.mmio_start = 0; |
| 1829 | info->fix.mmio_len = 0; |
| 1830 | info->fix.type_aux = 0; |
| 1831 | info->fix.xpanstep = 1; /* doing it in hw */ |
| 1832 | info->fix.ypanstep = 1; /* doing it in hw */ |
| 1833 | info->fix.ywrapstep = 0; |
| 1834 | info->fix.accel = FB_ACCEL_NONE; |
| 1835 | |
| 1836 | info->fix.line_length = pitch; |
| 1837 | } |
| 1838 | |
| 1839 | #endif /* __linux__ */ |
| 1840 | |
| 1841 | static void drm_fb_helper_fill_var(struct fb_info *info, |
| 1842 | struct drm_fb_helper *fb_helper, |
| 1843 | uint32_t fb_width, uint32_t fb_height) |
| 1844 | { |
| 1845 | struct drm_framebuffer *fb = fb_helper->fb; |
| 1846 | const struct drm_format_info *format = fb->format; |
| 1847 | |
| 1848 | switch (format->format) { |
| 1849 | case DRM_FORMAT_C1((__u32)('C') | ((__u32)('1') << 8) | ((__u32)(' ') << 16) | ((__u32)(' ') << 24)): |
| 1850 | case DRM_FORMAT_C2((__u32)('C') | ((__u32)('2') << 8) | ((__u32)(' ') << 16) | ((__u32)(' ') << 24)): |
| 1851 | case DRM_FORMAT_C4((__u32)('C') | ((__u32)('4') << 8) | ((__u32)(' ') << 16) | ((__u32)(' ') << 24)): |
| 1852 | /* supported format with sub-byte pixels */ |
| 1853 | break; |
| 1854 | |
| 1855 | default: |
| 1856 | WARN_ON((drm_format_info_block_width(format, 0) > 1) ||({ int __ret = !!((drm_format_info_block_width(format, 0) > 1) || (drm_format_info_block_height(format, 0) > 1)); if ( __ret) printf("WARNING %s failed at %s:%d\n", "(drm_format_info_block_width(format, 0) > 1) || (drm_format_info_block_height(format, 0) > 1)" , "/usr/src/sys/dev/pci/drm/drm_fb_helper.c", 1857); __builtin_expect (!!(__ret), 0); }) |
| 1857 | (drm_format_info_block_height(format, 0) > 1))({ int __ret = !!((drm_format_info_block_width(format, 0) > 1) || (drm_format_info_block_height(format, 0) > 1)); if ( __ret) printf("WARNING %s failed at %s:%d\n", "(drm_format_info_block_width(format, 0) > 1) || (drm_format_info_block_height(format, 0) > 1)" , "/usr/src/sys/dev/pci/drm/drm_fb_helper.c", 1857); __builtin_expect (!!(__ret), 0); }); |
| 1858 | break; |
| 1859 | } |
| 1860 | |
| 1861 | #ifdef notyet |
| 1862 | info->pseudo_palette = fb_helper->pseudo_palette; |
| 1863 | info->var.xres_virtual = fb->width; |
| 1864 | info->var.yres_virtual = fb->height; |
| 1865 | info->var.bits_per_pixel = drm_format_info_bpp(format, 0); |
| 1866 | info->var.accel_flags = FB_ACCELF_TEXT; |
| 1867 | info->var.xoffset = 0; |
| 1868 | info->var.yoffset = 0; |
| 1869 | info->var.activate = FB_ACTIVATE_NOW; |
| 1870 | |
| 1871 | drm_fb_helper_fill_pixel_fmt(&info->var, format); |
| 1872 | #endif |
| 1873 | |
| 1874 | info->var.xres = fb_width; |
| 1875 | info->var.yres = fb_height; |
| 1876 | } |
| 1877 | |
| 1878 | /** |
| 1879 | * drm_fb_helper_fill_info - initializes fbdev information |
| 1880 | * @info: fbdev instance to set up |
| 1881 | * @fb_helper: fb helper instance to use as template |
| 1882 | * @sizes: describes fbdev size and scanout surface size |
| 1883 | * |
| 1884 | * Sets up the variable and fixed fbdev metainformation from the given fb helper |
| 1885 | * instance and the drm framebuffer allocated in &drm_fb_helper.fb. |
| 1886 | * |
| 1887 | * Drivers should call this (or their equivalent setup code) from their |
| 1888 | * &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev |
| 1889 | * backing storage framebuffer. |
| 1890 | */ |
| 1891 | void drm_fb_helper_fill_info(struct fb_info *info, |
| 1892 | struct drm_fb_helper *fb_helper, |
| 1893 | struct drm_fb_helper_surface_size *sizes) |
| 1894 | { |
| 1895 | #ifdef __linux__ |
| 1896 | struct drm_framebuffer *fb = fb_helper->fb; |
| 1897 | |
| 1898 | drm_fb_helper_fill_fix(info, fb->pitches[0], |
| 1899 | fb->format->is_color_indexed); |
| 1900 | #endif |
| 1901 | drm_fb_helper_fill_var(info, fb_helper, |
| 1902 | sizes->fb_width, sizes->fb_height); |
| 1903 | |
| 1904 | info->par = fb_helper; |
| 1905 | #ifdef __linux__ |
| 1906 | /* |
| 1907 | * The DRM drivers fbdev emulation device name can be confusing if the |
| 1908 | * driver name also has a "drm" suffix on it. Leading to names such as |
| 1909 | * "simpledrmdrmfb" in /proc/fb. Unfortunately, it's an uAPI and can't |
| 1910 | * be changed due user-space tools (e.g: pm-utils) matching against it. |
| 1911 | */ |
| 1912 | snprintf(info->fix.id, sizeof(info->fix.id), "%sdrmfb", |
| 1913 | fb_helper->dev->driver->name); |
| 1914 | #endif |
| 1915 | } |
| 1916 | EXPORT_SYMBOL(drm_fb_helper_fill_info); |
| 1917 | |
| 1918 | /* |
| 1919 | * This is a continuation of drm_setup_crtcs() that sets up anything related |
| 1920 | * to the framebuffer. During initialization, drm_setup_crtcs() is called before |
| 1921 | * the framebuffer has been allocated (fb_helper->fb and fb_helper->fbdev). |
| 1922 | * So, any setup that touches those fields needs to be done here instead of in |
| 1923 | * drm_setup_crtcs(). |
| 1924 | */ |
| 1925 | static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) |
| 1926 | { |
| 1927 | struct drm_client_dev *client = &fb_helper->client; |
| 1928 | struct drm_connector_list_iter conn_iter; |
| 1929 | struct fb_info *info = fb_helper->fbdev; |
| 1930 | unsigned int rotation, sw_rotations = 0; |
| 1931 | struct drm_connector *connector; |
| 1932 | struct drm_mode_set *modeset; |
| 1933 | |
| 1934 | mutex_lock(&client->modeset_mutex)rw_enter_write(&client->modeset_mutex); |
| 1935 | drm_client_for_each_modeset(modeset, client)for (({ do { (void)(&(client)->modeset_mutex); } while (0); }), modeset = (client)->modesets; modeset->crtc; modeset ++) { |
| 1936 | if (!modeset->num_connectors) |
| 1937 | continue; |
| 1938 | |
| 1939 | modeset->fb = fb_helper->fb; |
| 1940 | |
| 1941 | if (drm_client_rotation(modeset, &rotation)) |
| 1942 | /* Rotating in hardware, fbcon should not rotate */ |
| 1943 | sw_rotations |= DRM_MODE_ROTATE_0(1<<0); |
| 1944 | else |
| 1945 | sw_rotations |= rotation; |
| 1946 | } |
| 1947 | mutex_unlock(&client->modeset_mutex)rw_exit_write(&client->modeset_mutex); |
| 1948 | |
| 1949 | drm_connector_list_iter_begin(fb_helper->dev, &conn_iter); |
| 1950 | drm_client_for_each_connector_iter(connector, &conn_iter)while ((connector = drm_connector_list_iter_next(&conn_iter ))) if (connector->connector_type != 18) { |
| 1951 | |
| 1952 | /* use first connected connector for the physical dimensions */ |
| 1953 | if (connector->status == connector_status_connected) { |
| 1954 | info->var.width = connector->display_info.width_mm; |
| 1955 | info->var.height = connector->display_info.height_mm; |
| 1956 | break; |
| 1957 | } |
| 1958 | } |
| 1959 | drm_connector_list_iter_end(&conn_iter); |
| 1960 | |
| 1961 | switch (sw_rotations) { |
| 1962 | case DRM_MODE_ROTATE_0(1<<0): |
| 1963 | info->fbcon_rotate_hint = FB_ROTATE_UR0; |
| 1964 | break; |
| 1965 | case DRM_MODE_ROTATE_90(1<<1): |
| 1966 | info->fbcon_rotate_hint = FB_ROTATE_CCW3; |
| 1967 | break; |
| 1968 | case DRM_MODE_ROTATE_180(1<<2): |
| 1969 | info->fbcon_rotate_hint = FB_ROTATE_UD2; |
| 1970 | break; |
| 1971 | case DRM_MODE_ROTATE_270(1<<3): |
| 1972 | info->fbcon_rotate_hint = FB_ROTATE_CW1; |
| 1973 | break; |
| 1974 | default: |
| 1975 | /* |
| 1976 | * Multiple bits are set / multiple rotations requested |
| 1977 | * fbcon cannot handle separate rotation settings per |
| 1978 | * output, so fallback to unrotated. |
| 1979 | */ |
| 1980 | info->fbcon_rotate_hint = FB_ROTATE_UR0; |
| 1981 | } |
| 1982 | } |
| 1983 | |
| 1984 | /* Note: Drops fb_helper->lock before returning. */ |
| 1985 | static int |
| 1986 | __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper, |
| 1987 | int bpp_sel) |
| 1988 | { |
| 1989 | struct drm_device *dev = fb_helper->dev; |
| 1990 | struct fb_info *info; |
| 1991 | unsigned int width, height; |
| 1992 | int ret; |
| 1993 | |
| 1994 | width = dev->mode_config.max_width; |
| 1995 | height = dev->mode_config.max_height; |
| 1996 | |
| 1997 | drm_client_modeset_probe(&fb_helper->client, width, height); |
| 1998 | ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); |
| 1999 | if (ret < 0) { |
| 2000 | if (ret == -EAGAIN35) { |
| 2001 | fb_helper->preferred_bpp = bpp_sel; |
| 2002 | fb_helper->deferred_setup = true1; |
| 2003 | ret = 0; |
| 2004 | } |
| 2005 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 2006 | |
| 2007 | return ret; |
| 2008 | } |
| 2009 | drm_setup_crtcs_fb(fb_helper); |
| 2010 | |
| 2011 | fb_helper->deferred_setup = false0; |
| 2012 | |
| 2013 | info = fb_helper->fbdev; |
| 2014 | info->var.pixclock = 0; |
| 2015 | /* Shamelessly allow physical address leaking to userspace */ |
| 2016 | #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM)0 |
| 2017 | if (!drm_leak_fbdev_smem) |
| 2018 | #endif |
| 2019 | /* don't leak any physical addresses to userspace */ |
| 2020 | info->flags |= FBINFO_HIDE_SMEM_START0; |
| 2021 | |
| 2022 | /* Need to drop locks to avoid recursive deadlock in |
| 2023 | * register_framebuffer. This is ok because the only thing left to do is |
| 2024 | * register the fbdev emulation instance in kernel_fb_helper_list. */ |
| 2025 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 2026 | |
| 2027 | ret = register_framebuffer(info); |
| 2028 | if (ret < 0) |
| 2029 | return ret; |
| 2030 | |
| 2031 | #ifdef __linux__ |
| 2032 | drm_info(dev, "fb%d: %s frame buffer device\n",do { } while(0) |
| 2033 | info->node, info->fix.id)do { } while(0); |
| 2034 | #endif |
| 2035 | |
| 2036 | mutex_lock(&kernel_fb_helper_lock)rw_enter_write(&kernel_fb_helper_lock); |
| 2037 | if (list_empty(&kernel_fb_helper_list)) |
| 2038 | register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); |
| 2039 | |
| 2040 | list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); |
| 2041 | mutex_unlock(&kernel_fb_helper_lock)rw_exit_write(&kernel_fb_helper_lock); |
| 2042 | |
| 2043 | return 0; |
| 2044 | } |
| 2045 | |
| 2046 | /** |
| 2047 | * drm_fb_helper_initial_config - setup a sane initial connector configuration |
| 2048 | * @fb_helper: fb_helper device struct |
| 2049 | * @bpp_sel: bpp value to use for the framebuffer configuration |
| 2050 | * |
| 2051 | * Scans the CRTCs and connectors and tries to put together an initial setup. |
| 2052 | * At the moment, this is a cloned configuration across all heads with |
| 2053 | * a new framebuffer object as the backing store. |
| 2054 | * |
| 2055 | * Note that this also registers the fbdev and so allows userspace to call into |
| 2056 | * the driver through the fbdev interfaces. |
| 2057 | * |
| 2058 | * This function will call down into the &drm_fb_helper_funcs.fb_probe callback |
| 2059 | * to let the driver allocate and initialize the fbdev info structure and the |
| 2060 | * drm framebuffer used to back the fbdev. drm_fb_helper_fill_info() is provided |
| 2061 | * as a helper to setup simple default values for the fbdev info structure. |
| 2062 | * |
| 2063 | * HANG DEBUGGING: |
| 2064 | * |
| 2065 | * When you have fbcon support built-in or already loaded, this function will do |
| 2066 | * a full modeset to setup the fbdev console. Due to locking misdesign in the |
| 2067 | * VT/fbdev subsystem that entire modeset sequence has to be done while holding |
| 2068 | * console_lock. Until console_unlock is called no dmesg lines will be sent out |
| 2069 | * to consoles, not even serial console. This means when your driver crashes, |
| 2070 | * you will see absolutely nothing else but a system stuck in this function, |
| 2071 | * with no further output. Any kind of printk() you place within your own driver |
| 2072 | * or in the drm core modeset code will also never show up. |
| 2073 | * |
| 2074 | * Standard debug practice is to run the fbcon setup without taking the |
| 2075 | * console_lock as a hack, to be able to see backtraces and crashes on the |
| 2076 | * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel |
| 2077 | * cmdline option. |
| 2078 | * |
| 2079 | * The other option is to just disable fbdev emulation since very likely the |
| 2080 | * first modeset from userspace will crash in the same way, and is even easier |
| 2081 | * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 |
| 2082 | * kernel cmdline option. |
| 2083 | * |
| 2084 | * RETURNS: |
| 2085 | * Zero if everything went ok, nonzero otherwise. |
| 2086 | */ |
| 2087 | int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) |
| 2088 | { |
| 2089 | int ret; |
| 2090 | |
| 2091 | if (!drm_fbdev_emulation) |
| 2092 | return 0; |
| 2093 | |
| 2094 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 2095 | ret = __drm_fb_helper_initial_config_and_unlock(fb_helper, bpp_sel); |
| 2096 | |
| 2097 | return ret; |
| 2098 | } |
| 2099 | EXPORT_SYMBOL(drm_fb_helper_initial_config); |
| 2100 | |
| 2101 | /** |
| 2102 | * drm_fb_helper_hotplug_event - respond to a hotplug notification by |
| 2103 | * probing all the outputs attached to the fb |
| 2104 | * @fb_helper: driver-allocated fbdev helper, can be NULL |
| 2105 | * |
| 2106 | * Scan the connectors attached to the fb_helper and try to put together a |
| 2107 | * setup after notification of a change in output configuration. |
| 2108 | * |
| 2109 | * Called at runtime, takes the mode config locks to be able to check/change the |
| 2110 | * modeset configuration. Must be run from process context (which usually means |
| 2111 | * either the output polling work or a work item launched from the driver's |
| 2112 | * hotplug interrupt). |
| 2113 | * |
| 2114 | * Note that drivers may call this even before calling |
| 2115 | * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows |
| 2116 | * for a race-free fbcon setup and will make sure that the fbdev emulation will |
| 2117 | * not miss any hotplug events. |
| 2118 | * |
| 2119 | * RETURNS: |
| 2120 | * 0 on success and a non-zero error code otherwise. |
| 2121 | */ |
| 2122 | int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) |
| 2123 | { |
| 2124 | struct fb_info *fbi; |
| 2125 | int err = 0; |
| 2126 | |
| 2127 | if (!drm_fbdev_emulation || !fb_helper) |
| 2128 | return 0; |
| 2129 | |
| 2130 | mutex_lock(&fb_helper->lock)rw_enter_write(&fb_helper->lock); |
| 2131 | if (fb_helper->deferred_setup) { |
| 2132 | err = __drm_fb_helper_initial_config_and_unlock(fb_helper, |
| 2133 | fb_helper->preferred_bpp); |
| 2134 | return err; |
| 2135 | } |
| 2136 | |
| 2137 | if (!fb_helper->fb || !drm_master_internal_acquire(fb_helper->dev)) { |
| 2138 | fb_helper->delayed_hotplug = true1; |
| 2139 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 2140 | return err; |
| 2141 | } |
| 2142 | |
| 2143 | drm_master_internal_release(fb_helper->dev); |
| 2144 | |
| 2145 | drm_dbg_kms(fb_helper->dev, "\n")__drm_dev_dbg(((void *)0), (fb_helper->dev) ? (fb_helper-> dev)->dev : ((void *)0), DRM_UT_KMS, "\n"); |
| 2146 | |
| 2147 | drm_client_modeset_probe(&fb_helper->client, fb_helper->fb->width, fb_helper->fb->height); |
| 2148 | drm_setup_crtcs_fb(fb_helper); |
| 2149 | mutex_unlock(&fb_helper->lock)rw_exit_write(&fb_helper->lock); |
| 2150 | |
| 2151 | fbi = fb_helper->fbdev; |
| 2152 | if (fbi->fbops && fbi->fbops->fb_set_par) |
| 2153 | fbi->fbops->fb_set_par(fbi); |
| 2154 | else |
| 2155 | drm_fb_helper_set_par(fb_helper->fbdev); |
| 2156 | |
| 2157 | return 0; |
| 2158 | } |
| 2159 | EXPORT_SYMBOL(drm_fb_helper_hotplug_event); |
| 2160 | |
| 2161 | /** |
| 2162 | * drm_fb_helper_lastclose - DRM driver lastclose helper for fbdev emulation |
| 2163 | * @dev: DRM device |
| 2164 | * |
| 2165 | * This function can be used as the &drm_driver->lastclose callback for drivers |
| 2166 | * that only need to call drm_fb_helper_restore_fbdev_mode_unlocked(). |
| 2167 | */ |
| 2168 | void drm_fb_helper_lastclose(struct drm_device *dev) |
| 2169 | { |
| 2170 | drm_fb_helper_restore_fbdev_mode_unlocked(dev->fb_helper); |
| 2171 | } |
| 2172 | EXPORT_SYMBOL(drm_fb_helper_lastclose); |
| 2173 | |
| 2174 | /** |
| 2175 | * drm_fb_helper_output_poll_changed - DRM mode config \.output_poll_changed |
| 2176 | * helper for fbdev emulation |
| 2177 | * @dev: DRM device |
| 2178 | * |
| 2179 | * This function can be used as the |
| 2180 | * &drm_mode_config_funcs.output_poll_changed callback for drivers that only |
| 2181 | * need to call drm_fb_helper_hotplug_event(). |
| 2182 | */ |
| 2183 | void drm_fb_helper_output_poll_changed(struct drm_device *dev) |
| 2184 | { |
| 2185 | drm_fb_helper_hotplug_event(dev->fb_helper); |
| 2186 | } |
| 2187 | EXPORT_SYMBOL(drm_fb_helper_output_poll_changed); |
| 2188 | |
| 2189 | #ifdef __linux__ |
| 2190 | /* @user: 1=userspace, 0=fbcon */ |
| 2191 | static int drm_fbdev_fb_open(struct fb_info *info, int user) |
| 2192 | { |
| 2193 | struct drm_fb_helper *fb_helper = info->par; |
| 2194 | |
| 2195 | /* No need to take a ref for fbcon because it unbinds on unregister */ |
| 2196 | if (user && !try_module_get(fb_helper->dev->driver->fops->owner)) |
| 2197 | return -ENODEV19; |
| 2198 | |
| 2199 | return 0; |
| 2200 | } |
| 2201 | |
| 2202 | static int drm_fbdev_fb_release(struct fb_info *info, int user) |
| 2203 | { |
| 2204 | struct drm_fb_helper *fb_helper = info->par; |
| 2205 | |
| 2206 | if (user) |
| 2207 | module_put(fb_helper->dev->driver->fops->owner); |
| 2208 | |
| 2209 | return 0; |
| 2210 | } |
| 2211 | |
| 2212 | #endif /* __linux__ */ |
| 2213 | |
| 2214 | static void drm_fbdev_cleanup(struct drm_fb_helper *fb_helper) |
| 2215 | { |
| 2216 | struct fb_info *fbi = fb_helper->fbdev; |
| 2217 | void *shadow = NULL((void *)0); |
| 2218 | |
| 2219 | if (!fb_helper->dev) |
| 2220 | return; |
| 2221 | |
| 2222 | if (fbi) { |
| 2223 | #ifdef notyet |
| 2224 | if (fbi->fbdefio) |
| 2225 | fb_deferred_io_cleanup(fbi); |
| 2226 | #endif |
| 2227 | if (drm_fbdev_use_shadow_fb(fb_helper)) |
| 2228 | shadow = fbi->screen_buffer; |
| 2229 | } |
| 2230 | |
| 2231 | drm_fb_helper_fini(fb_helper); |
| 2232 | |
| 2233 | if (shadow) |
| 2234 | vfree(shadow); |
| 2235 | else if (fb_helper->buffer) |
| 2236 | drm_client_buffer_vunmap(fb_helper->buffer); |
| 2237 | |
| 2238 | drm_client_framebuffer_delete(fb_helper->buffer); |
| 2239 | } |
| 2240 | |
| 2241 | static void drm_fbdev_release(struct drm_fb_helper *fb_helper) |
| 2242 | { |
| 2243 | drm_fbdev_cleanup(fb_helper); |
| 2244 | drm_client_release(&fb_helper->client); |
| 2245 | kfree(fb_helper); |
| 2246 | } |
| 2247 | |
| 2248 | #ifdef __linux__ |
| 2249 | |
| 2250 | /* |
| 2251 | * fb_ops.fb_destroy is called by the last put_fb_info() call at the end of |
| 2252 | * unregister_framebuffer() or fb_release(). |
| 2253 | */ |
| 2254 | static void drm_fbdev_fb_destroy(struct fb_info *info) |
| 2255 | { |
| 2256 | drm_fbdev_release(info->par); |
| 2257 | } |
| 2258 | |
| 2259 | static int drm_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) |
| 2260 | { |
| 2261 | struct drm_fb_helper *fb_helper = info->par; |
| 2262 | |
| 2263 | if (drm_fbdev_use_shadow_fb(fb_helper)) |
| 2264 | return fb_deferred_io_mmap(info, vma); |
| 2265 | else if (fb_helper->dev->driver->gem_prime_mmap) |
| 2266 | return fb_helper->dev->driver->gem_prime_mmap(fb_helper->buffer->gem, vma); |
| 2267 | else |
| 2268 | return -ENODEV19; |
| 2269 | } |
| 2270 | |
| 2271 | static bool_Bool drm_fbdev_use_iomem(struct fb_info *info) |
| 2272 | { |
| 2273 | struct drm_fb_helper *fb_helper = info->par; |
| 2274 | struct drm_client_buffer *buffer = fb_helper->buffer; |
| 2275 | |
| 2276 | return !drm_fbdev_use_shadow_fb(fb_helper) && buffer->map.is_iomem; |
| 2277 | } |
| 2278 | |
| 2279 | static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count, |
| 2280 | loff_t pos) |
| 2281 | { |
| 2282 | const char __iomem *src = info->screen_base + pos; |
| 2283 | size_t alloc_size = min_t(size_t, count, PAGE_SIZE)({ size_t __min_a = (count); size_t __min_b = ((1 << 12 )); __min_a < __min_b ? __min_a : __min_b; }); |
| 2284 | ssize_t ret = 0; |
| 2285 | int err = 0; |
| 2286 | char *tmp; |
| 2287 | |
| 2288 | tmp = kmalloc(alloc_size, GFP_KERNEL(0x0001 | 0x0004)); |
| 2289 | if (!tmp) |
| 2290 | return -ENOMEM12; |
| 2291 | |
| 2292 | while (count) { |
| 2293 | size_t c = min_t(size_t, count, alloc_size)({ size_t __min_a = (count); size_t __min_b = (alloc_size); __min_a < __min_b ? __min_a : __min_b; }); |
| 2294 | |
| 2295 | memcpy_fromio(tmp, src, c)__builtin_memcpy((tmp), (src), (c)); |
| 2296 | if (copy_to_user(buf, tmp, c)) { |
| 2297 | err = -EFAULT14; |
| 2298 | break; |
| 2299 | } |
| 2300 | |
| 2301 | src += c; |
| 2302 | buf += c; |
| 2303 | ret += c; |
| 2304 | count -= c; |
| 2305 | } |
| 2306 | |
| 2307 | kfree(tmp); |
| 2308 | |
| 2309 | return ret ? ret : err; |
| 2310 | } |
| 2311 | |
| 2312 | static ssize_t fb_read_screen_buffer(struct fb_info *info, char __user *buf, size_t count, |
| 2313 | loff_t pos) |
| 2314 | { |
| 2315 | const char *src = info->screen_buffer + pos; |
| 2316 | |
| 2317 | if (copy_to_user(buf, src, count)) |
| 2318 | return -EFAULT14; |
| 2319 | |
| 2320 | return count; |
| 2321 | } |
| 2322 | |
| 2323 | static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, |
| 2324 | size_t count, loff_t *ppos) |
| 2325 | { |
| 2326 | loff_t pos = *ppos; |
| 2327 | size_t total_size; |
| 2328 | ssize_t ret; |
| 2329 | |
| 2330 | if (info->screen_size) |
| 2331 | total_size = info->screen_size; |
| 2332 | else |
| 2333 | total_size = info->fix.smem_len; |
| 2334 | |
| 2335 | if (pos >= total_size) |
| 2336 | return 0; |
| 2337 | if (count >= total_size) |
| 2338 | count = total_size; |
| 2339 | if (total_size - count < pos) |
| 2340 | count = total_size - pos; |
| 2341 | |
| 2342 | if (drm_fbdev_use_iomem(info)) |
| 2343 | ret = fb_read_screen_base(info, buf, count, pos); |
| 2344 | else |
| 2345 | ret = fb_read_screen_buffer(info, buf, count, pos); |
| 2346 | |
| 2347 | if (ret > 0) |
| 2348 | *ppos += ret; |
| 2349 | |
| 2350 | return ret; |
| 2351 | } |
| 2352 | |
| 2353 | static ssize_t fb_write_screen_base(struct fb_info *info, const char __user *buf, size_t count, |
| 2354 | loff_t pos) |
| 2355 | { |
| 2356 | char __iomem *dst = info->screen_base + pos; |
| 2357 | size_t alloc_size = min_t(size_t, count, PAGE_SIZE)({ size_t __min_a = (count); size_t __min_b = ((1 << 12 )); __min_a < __min_b ? __min_a : __min_b; }); |
| 2358 | ssize_t ret = 0; |
| 2359 | int err = 0; |
| 2360 | u8 *tmp; |
| 2361 | |
| 2362 | tmp = kmalloc(alloc_size, GFP_KERNEL(0x0001 | 0x0004)); |
| 2363 | if (!tmp) |
| 2364 | return -ENOMEM12; |
| 2365 | |
| 2366 | while (count) { |
| 2367 | size_t c = min_t(size_t, count, alloc_size)({ size_t __min_a = (count); size_t __min_b = (alloc_size); __min_a < __min_b ? __min_a : __min_b; }); |
| 2368 | |
| 2369 | if (copy_from_user(tmp, buf, c)) { |
| 2370 | err = -EFAULT14; |
| 2371 | break; |
| 2372 | } |
| 2373 | memcpy_toio(dst, tmp, c)__builtin_memcpy((dst), (tmp), (c)); |
| 2374 | |
| 2375 | dst += c; |
| 2376 | buf += c; |
| 2377 | ret += c; |
| 2378 | count -= c; |
| 2379 | } |
| 2380 | |
| 2381 | kfree(tmp); |
| 2382 | |
| 2383 | return ret ? ret : err; |
| 2384 | } |
| 2385 | |
| 2386 | static ssize_t fb_write_screen_buffer(struct fb_info *info, const char __user *buf, size_t count, |
| 2387 | loff_t pos) |
| 2388 | { |
| 2389 | char *dst = info->screen_buffer + pos; |
| 2390 | |
| 2391 | if (copy_from_user(dst, buf, count)) |
| 2392 | return -EFAULT14; |
| 2393 | |
| 2394 | return count; |
| 2395 | } |
| 2396 | |
| 2397 | static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, |
| 2398 | size_t count, loff_t *ppos) |
| 2399 | { |
| 2400 | loff_t pos = *ppos; |
| 2401 | size_t total_size; |
| 2402 | ssize_t ret; |
| 2403 | struct drm_rect damage_area; |
| 2404 | int err = 0; |
| 2405 | |
| 2406 | if (info->screen_size) |
| 2407 | total_size = info->screen_size; |
| 2408 | else |
| 2409 | total_size = info->fix.smem_len; |
| 2410 | |
| 2411 | if (pos > total_size) |
| 2412 | return -EFBIG27; |
| 2413 | if (count > total_size) { |
| 2414 | err = -EFBIG27; |
| 2415 | count = total_size; |
| 2416 | } |
| 2417 | if (total_size - count < pos) { |
| 2418 | if (!err) |
| 2419 | err = -ENOSPC28; |
| 2420 | count = total_size - pos; |
| 2421 | } |
| 2422 | |
| 2423 | /* |
| 2424 | * Copy to framebuffer even if we already logged an error. Emulates |
| 2425 | * the behavior of the original fbdev implementation. |
| 2426 | */ |
| 2427 | if (drm_fbdev_use_iomem(info)) |
| 2428 | ret = fb_write_screen_base(info, buf, count, pos); |
| 2429 | else |
| 2430 | ret = fb_write_screen_buffer(info, buf, count, pos); |
| 2431 | |
| 2432 | if (ret < 0) |
| 2433 | return ret; /* return last error, if any */ |
| 2434 | else if (!ret) |
| 2435 | return err; /* return previous error, if any */ |
| 2436 | |
| 2437 | *ppos += ret; |
| 2438 | |
| 2439 | drm_fb_helper_memory_range_to_clip(info, pos, ret, &damage_area); |
| 2440 | drm_fb_helper_damage(info, damage_area.x1, damage_area.y1, |
| 2441 | drm_rect_width(&damage_area), |
| 2442 | drm_rect_height(&damage_area)); |
| 2443 | |
| 2444 | return ret; |
| 2445 | } |
| 2446 | |
| 2447 | static void drm_fbdev_fb_fillrect(struct fb_info *info, |
| 2448 | const struct fb_fillrect *rect) |
| 2449 | { |
| 2450 | if (drm_fbdev_use_iomem(info)) |
| 2451 | drm_fb_helper_cfb_fillrect(info, rect); |
| 2452 | else |
| 2453 | drm_fb_helper_sys_fillrect(info, rect); |
| 2454 | } |
| 2455 | |
| 2456 | static void drm_fbdev_fb_copyarea(struct fb_info *info, |
| 2457 | const struct fb_copyarea *area) |
| 2458 | { |
| 2459 | if (drm_fbdev_use_iomem(info)) |
| 2460 | drm_fb_helper_cfb_copyarea(info, area); |
| 2461 | else |
| 2462 | drm_fb_helper_sys_copyarea(info, area); |
| 2463 | } |
| 2464 | |
| 2465 | static void drm_fbdev_fb_imageblit(struct fb_info *info, |
| 2466 | const struct fb_image *image) |
| 2467 | { |
| 2468 | if (drm_fbdev_use_iomem(info)) |
| 2469 | drm_fb_helper_cfb_imageblit(info, image); |
| 2470 | else |
| 2471 | drm_fb_helper_sys_imageblit(info, image); |
| 2472 | } |
| 2473 | |
| 2474 | #endif /* __linux__ */ |
| 2475 | |
| 2476 | static const struct fb_ops drm_fbdev_fb_ops = { |
| 2477 | #ifdef notyet |
| 2478 | .owner = THIS_MODULE((void *)0), |
| 2479 | DRM_FB_HELPER_DEFAULT_OPS.fb_set_par = drm_fb_helper_set_par, |
| 2480 | .fb_open = drm_fbdev_fb_open, |
| 2481 | .fb_release = drm_fbdev_fb_release, |
| 2482 | .fb_destroy = drm_fbdev_fb_destroy, |
| 2483 | .fb_mmap = drm_fbdev_fb_mmap, |
| 2484 | .fb_read = drm_fbdev_fb_read, |
| 2485 | .fb_write = drm_fbdev_fb_write, |
| 2486 | .fb_fillrect = drm_fbdev_fb_fillrect, |
| 2487 | .fb_copyarea = drm_fbdev_fb_copyarea, |
| 2488 | .fb_imageblit = drm_fbdev_fb_imageblit, |
| 2489 | #else |
| 2490 | DRM_FB_HELPER_DEFAULT_OPS.fb_set_par = drm_fb_helper_set_par, |
| 2491 | #endif |
| 2492 | }; |
| 2493 | |
| 2494 | #ifdef notyet |
| 2495 | static struct fb_deferred_io drm_fbdev_defio = { |
| 2496 | .delay = HZhz / 20, |
| 2497 | .deferred_io = drm_fb_helper_deferred_io, |
| 2498 | }; |
| 2499 | #endif |
| 2500 | |
| 2501 | /* |
| 2502 | * This function uses the client API to create a framebuffer backed by a dumb buffer. |
| 2503 | * |
| 2504 | * The _sys_ versions are used for &fb_ops.fb_read, fb_write, fb_fillrect, |
| 2505 | * fb_copyarea, fb_imageblit. |
| 2506 | */ |
| 2507 | static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, |
| 2508 | struct drm_fb_helper_surface_size *sizes) |
| 2509 | { |
| 2510 | struct drm_client_dev *client = &fb_helper->client; |
| 2511 | struct drm_device *dev = fb_helper->dev; |
| 2512 | struct drm_client_buffer *buffer; |
| 2513 | struct drm_framebuffer *fb; |
| 2514 | struct fb_info *fbi; |
| 2515 | u32 format; |
| 2516 | struct iosys_map map; |
| 2517 | int ret; |
| 2518 | |
| 2519 | drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n",__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "surface width(%d), height(%d) and bpp(%d)\n", sizes->surface_width, sizes->surface_height, sizes-> surface_bpp) |
| 2520 | sizes->surface_width, sizes->surface_height,__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "surface width(%d), height(%d) and bpp(%d)\n", sizes->surface_width, sizes->surface_height, sizes-> surface_bpp) |
| 2521 | sizes->surface_bpp)__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "surface width(%d), height(%d) and bpp(%d)\n", sizes->surface_width, sizes->surface_height, sizes-> surface_bpp); |
| 2522 | |
| 2523 | format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth); |
| 2524 | buffer = drm_client_framebuffer_create(client, sizes->surface_width, |
| 2525 | sizes->surface_height, format); |
| 2526 | if (IS_ERR(buffer)) |
| 2527 | return PTR_ERR(buffer); |
| 2528 | |
| 2529 | fb_helper->buffer = buffer; |
| 2530 | fb_helper->fb = buffer->fb; |
| 2531 | fb = buffer->fb; |
| 2532 | |
| 2533 | fbi = drm_fb_helper_alloc_fbi(fb_helper); |
| 2534 | if (IS_ERR(fbi)) |
| 2535 | return PTR_ERR(fbi); |
| 2536 | |
| 2537 | fbi->fbops = &drm_fbdev_fb_ops; |
| 2538 | fbi->screen_size = sizes->surface_height * fb->pitches[0]; |
| 2539 | #ifdef __linux__ |
| 2540 | fbi->fix.smem_len = fbi->screen_size; |
| 2541 | #endif |
| 2542 | fbi->flags = FBINFO_DEFAULT0; |
| 2543 | |
| 2544 | drm_fb_helper_fill_info(fbi, fb_helper, sizes); |
| 2545 | |
| 2546 | if (drm_fbdev_use_shadow_fb(fb_helper)) { |
| 2547 | fbi->screen_buffer = vzalloc(fbi->screen_size); |
| 2548 | if (!fbi->screen_buffer) |
| 2549 | return -ENOMEM12; |
| 2550 | fbi->flags |= FBINFO_VIRTFB1 | FBINFO_READS_FAST2; |
| 2551 | |
| 2552 | #ifdef notyet |
| 2553 | fbi->fbdefio = &drm_fbdev_defio; |
| 2554 | fb_deferred_io_init(fbi); |
| 2555 | #endif |
| 2556 | } else { |
| 2557 | /* buffer is mapped for HW framebuffer */ |
| 2558 | ret = drm_client_buffer_vmap(fb_helper->buffer, &map); |
| 2559 | if (ret) |
| 2560 | return ret; |
| 2561 | if (map.is_iomem) { |
| 2562 | fbi->screen_base = map.vaddr_iomem; |
| 2563 | } else { |
| 2564 | fbi->screen_buffer = map.vaddr; |
| 2565 | fbi->flags |= FBINFO_VIRTFB1; |
| 2566 | } |
| 2567 | |
| 2568 | /* |
| 2569 | * Shamelessly leak the physical address to user-space. As |
| 2570 | * page_to_phys() is undefined for I/O memory, warn in this |
| 2571 | * case. |
| 2572 | */ |
| 2573 | #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM)0 |
| 2574 | if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0 && |
| 2575 | !drm_WARN_ON_ONCE(dev, map.is_iomem)({ static int __warned; int __ret = !!((map.is_iomem)); if (__ret && !__warned) { printf("%s %s: " "%s", dev_driver_string (((dev))->dev), "", "drm_WARN_ON_ONCE(" "map.is_iomem" ")" ); __warned = 1; } __builtin_expect(!!(__ret), 0); })) |
| 2576 | fbi->fix.smem_start = |
| 2577 | page_to_phys(virt_to_page(fbi->screen_buffer))(((virt_to_page(fbi->screen_buffer))->phys_addr)); |
| 2578 | #endif |
| 2579 | } |
| 2580 | |
| 2581 | return 0; |
| 2582 | } |
| 2583 | |
| 2584 | static const struct drm_fb_helper_funcs drm_fb_helper_generic_funcs = { |
| 2585 | .fb_probe = drm_fb_helper_generic_probe, |
| 2586 | }; |
| 2587 | |
| 2588 | static void drm_fbdev_client_unregister(struct drm_client_dev *client) |
| 2589 | { |
| 2590 | struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); |
| 2591 | |
| 2592 | if (fb_helper->fbdev) |
| 2593 | /* drm_fbdev_fb_destroy() takes care of cleanup */ |
| 2594 | drm_fb_helper_unregister_fbi(fb_helper); |
| 2595 | else |
| 2596 | drm_fbdev_release(fb_helper); |
| 2597 | } |
| 2598 | |
| 2599 | static int drm_fbdev_client_restore(struct drm_client_dev *client) |
| 2600 | { |
| 2601 | drm_fb_helper_lastclose(client->dev); |
| 2602 | |
| 2603 | return 0; |
| 2604 | } |
| 2605 | |
| 2606 | static int drm_fbdev_client_hotplug(struct drm_client_dev *client) |
| 2607 | { |
| 2608 | struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); |
| 2609 | struct drm_device *dev = client->dev; |
| 2610 | int ret; |
| 2611 | |
| 2612 | /* Setup is not retried if it has failed */ |
| 2613 | if (!fb_helper->dev && fb_helper->funcs) |
| 2614 | return 0; |
| 2615 | |
| 2616 | if (dev->fb_helper) |
| 2617 | return drm_fb_helper_hotplug_event(dev->fb_helper); |
| 2618 | |
| 2619 | if (!dev->mode_config.num_connector) { |
| 2620 | drm_dbg_kms(dev, "No connectors found, will not create framebuffer!\n")__drm_dev_dbg(((void *)0), (dev) ? (dev)->dev : ((void *)0 ), DRM_UT_KMS, "No connectors found, will not create framebuffer!\n" ); |
| 2621 | return 0; |
| 2622 | } |
| 2623 | |
| 2624 | drm_fb_helper_prepare(dev, fb_helper, &drm_fb_helper_generic_funcs); |
| 2625 | |
| 2626 | ret = drm_fb_helper_init(dev, fb_helper); |
| 2627 | if (ret) |
| 2628 | goto err; |
| 2629 | |
| 2630 | if (!drm_drv_uses_atomic_modeset(dev)) |
| 2631 | drm_helper_disable_unused_functions(dev); |
| 2632 | |
| 2633 | ret = drm_fb_helper_initial_config(fb_helper, fb_helper->preferred_bpp); |
| 2634 | if (ret) |
| 2635 | goto err_cleanup; |
| 2636 | |
| 2637 | return 0; |
| 2638 | |
| 2639 | err_cleanup: |
| 2640 | drm_fbdev_cleanup(fb_helper); |
| 2641 | err: |
| 2642 | fb_helper->dev = NULL((void *)0); |
| 2643 | fb_helper->fbdev = NULL((void *)0); |
| 2644 | |
| 2645 | drm_err(dev, "fbdev: Failed to setup generic emulation (ret=%d)\n", ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "fbdev: Failed to setup generic emulation (ret=%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); |
| 2646 | |
| 2647 | return ret; |
| 2648 | } |
| 2649 | |
| 2650 | static const struct drm_client_funcs drm_fbdev_client_funcs = { |
| 2651 | .owner = THIS_MODULE((void *)0), |
| 2652 | .unregister = drm_fbdev_client_unregister, |
| 2653 | .restore = drm_fbdev_client_restore, |
| 2654 | .hotplug = drm_fbdev_client_hotplug, |
| 2655 | }; |
| 2656 | |
| 2657 | /** |
| 2658 | * drm_fbdev_generic_setup() - Setup generic fbdev emulation |
| 2659 | * @dev: DRM device |
| 2660 | * @preferred_bpp: Preferred bits per pixel for the device. |
| 2661 | * @dev->mode_config.preferred_depth is used if this is zero. |
| 2662 | * |
| 2663 | * This function sets up generic fbdev emulation for drivers that supports |
| 2664 | * dumb buffers with a virtual address and that can be mmap'ed. |
| 2665 | * drm_fbdev_generic_setup() shall be called after the DRM driver registered |
| 2666 | * the new DRM device with drm_dev_register(). |
| 2667 | * |
| 2668 | * Restore, hotplug events and teardown are all taken care of. Drivers that do |
| 2669 | * suspend/resume need to call drm_fb_helper_set_suspend_unlocked() themselves. |
| 2670 | * Simple drivers might use drm_mode_config_helper_suspend(). |
| 2671 | * |
| 2672 | * Drivers that set the dirty callback on their framebuffer will get a shadow |
| 2673 | * fbdev buffer that is blitted onto the real buffer. This is done in order to |
| 2674 | * make deferred I/O work with all kinds of buffers. A shadow buffer can be |
| 2675 | * requested explicitly by setting struct drm_mode_config.prefer_shadow or |
| 2676 | * struct drm_mode_config.prefer_shadow_fbdev to true beforehand. This is |
| 2677 | * required to use generic fbdev emulation with SHMEM helpers. |
| 2678 | * |
| 2679 | * This function is safe to call even when there are no connectors present. |
| 2680 | * Setup will be retried on the next hotplug event. |
| 2681 | * |
| 2682 | * The fbdev is destroyed by drm_dev_unregister(). |
| 2683 | */ |
| 2684 | void drm_fbdev_generic_setup(struct drm_device *dev, |
| 2685 | unsigned int preferred_bpp) |
| 2686 | { |
| 2687 | struct drm_fb_helper *fb_helper; |
| 2688 | int ret; |
| 2689 | |
| 2690 | drm_WARN(dev, !dev->registered, "Device has not been registered.\n")({ int __ret = !!(!dev->registered); if (__ret) printf("%s %s: " "Device has not been registered.\n", dev_driver_string((dev) ->dev), ""); __builtin_expect(!!(__ret), 0); }); |
| 2691 | drm_WARN(dev, dev->fb_helper, "fb_helper is already set!\n")({ int __ret = !!(dev->fb_helper); if (__ret) printf("%s %s: " "fb_helper is already set!\n", dev_driver_string((dev)->dev ), ""); __builtin_expect(!!(__ret), 0); }); |
| 2692 | |
| 2693 | if (!drm_fbdev_emulation) |
| 2694 | return; |
| 2695 | |
| 2696 | fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL(0x0001 | 0x0004)); |
| 2697 | if (!fb_helper) { |
| 2698 | drm_err(dev, "Failed to allocate fb_helper\n")printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to allocate fb_helper\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__); |
| 2699 | return; |
| 2700 | } |
| 2701 | |
| 2702 | ret = drm_client_init(dev, &fb_helper->client, "fbdev", &drm_fbdev_client_funcs); |
| 2703 | if (ret) { |
| 2704 | kfree(fb_helper); |
| 2705 | drm_err(dev, "Failed to register client: %d\n", ret)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to register client: %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); |
| 2706 | return; |
| 2707 | } |
| 2708 | |
| 2709 | /* |
| 2710 | * FIXME: This mixes up depth with bpp, which results in a glorious |
| 2711 | * mess, resulting in some drivers picking wrong fbdev defaults and |
| 2712 | * others wrong preferred_depth defaults. |
| 2713 | */ |
| 2714 | if (!preferred_bpp) |
| 2715 | preferred_bpp = dev->mode_config.preferred_depth; |
| 2716 | if (!preferred_bpp) |
| 2717 | preferred_bpp = 32; |
| 2718 | fb_helper->preferred_bpp = preferred_bpp; |
| 2719 | |
| 2720 | drm_client_register(&fb_helper->client); |
| 2721 | } |
| 2722 | EXPORT_SYMBOL(drm_fbdev_generic_setup); |