1 /* 2 * Copyright © 2007 David Airlie 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * David Airlie 25 */ 26 27 #include <linux/async.h> 28 #include <linux/console.h> 29 #include <linux/delay.h> 30 #include <linux/errno.h> 31 #include <linux/init.h> 32 #include <linux/kernel.h> 33 #include <linux/mm.h> 34 #include <linux/module.h> 35 #include <linux/string.h> 36 #include <linux/sysrq.h> 37 #include <linux/tty.h> 38 #include <linux/vga_switcheroo.h> 39 40 #include <drm/drm_crtc.h> 41 #include <drm/drm_fb_helper.h> 42 #include <drm/drm_fourcc.h> 43 44 #include "gem/i915_gem_lmem.h" 45 46 #include "i915_drv.h" 47 #include "intel_display_types.h" 48 #include "intel_fb.h" 49 #include "intel_fb_pin.h" 50 #include "intel_fbdev.h" 51 #include "intel_frontbuffer.h" 52 53 struct intel_fbdev { 54 struct drm_fb_helper helper; 55 struct intel_framebuffer *fb; 56 struct i915_vma *vma; 57 unsigned long vma_flags; 58 async_cookie_t cookie; 59 int preferred_bpp; 60 61 /* Whether or not fbdev hpd processing is temporarily suspended */ 62 bool hpd_suspended: 1; 63 /* Set when a hotplug was received while HPD processing was suspended */ 64 bool hpd_waiting: 1; 65 66 /* Protects hpd_suspended */ 67 struct mutex hpd_lock; 68 }; 69 70 static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) 71 { 72 return ifbdev->fb->frontbuffer; 73 } 74 75 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 76 { 77 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU); 78 } 79 80 static int intel_fbdev_set_par(struct fb_info *info) 81 { 82 struct drm_fb_helper *fb_helper = info->par; 83 struct intel_fbdev *ifbdev = 84 container_of(fb_helper, struct intel_fbdev, helper); 85 int ret; 86 87 ret = drm_fb_helper_set_par(info); 88 if (ret == 0) 89 intel_fbdev_invalidate(ifbdev); 90 91 return ret; 92 } 93 94 static int intel_fbdev_blank(int blank, struct fb_info *info) 95 { 96 struct drm_fb_helper *fb_helper = info->par; 97 struct intel_fbdev *ifbdev = 98 container_of(fb_helper, struct intel_fbdev, helper); 99 int ret; 100 101 ret = drm_fb_helper_blank(blank, info); 102 if (ret == 0) 103 intel_fbdev_invalidate(ifbdev); 104 105 return ret; 106 } 107 108 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 109 struct fb_info *info) 110 { 111 struct drm_fb_helper *fb_helper = info->par; 112 struct intel_fbdev *ifbdev = 113 container_of(fb_helper, struct intel_fbdev, helper); 114 int ret; 115 116 ret = drm_fb_helper_pan_display(var, info); 117 if (ret == 0) 118 intel_fbdev_invalidate(ifbdev); 119 120 return ret; 121 } 122 123 static const struct fb_ops intelfb_ops = { 124 .owner = THIS_MODULE, 125 DRM_FB_HELPER_DEFAULT_OPS, 126 .fb_set_par = intel_fbdev_set_par, 127 .fb_fillrect = drm_fb_helper_cfb_fillrect, 128 .fb_copyarea = drm_fb_helper_cfb_copyarea, 129 .fb_imageblit = drm_fb_helper_cfb_imageblit, 130 .fb_pan_display = intel_fbdev_pan_display, 131 .fb_blank = intel_fbdev_blank, 132 }; 133 134 static int intelfb_alloc(struct drm_fb_helper *helper, 135 struct drm_fb_helper_surface_size *sizes) 136 { 137 struct intel_fbdev *ifbdev = 138 container_of(helper, struct intel_fbdev, helper); 139 struct drm_framebuffer *fb; 140 struct drm_device *dev = helper->dev; 141 struct drm_i915_private *dev_priv = to_i915(dev); 142 struct drm_mode_fb_cmd2 mode_cmd = {}; 143 struct drm_i915_gem_object *obj; 144 int size; 145 146 /* we don't do packed 24bpp */ 147 if (sizes->surface_bpp == 24) 148 sizes->surface_bpp = 32; 149 150 mode_cmd.width = sizes->surface_width; 151 mode_cmd.height = sizes->surface_height; 152 153 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 154 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 155 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 156 sizes->surface_depth); 157 158 size = mode_cmd.pitches[0] * mode_cmd.height; 159 size = PAGE_ALIGN(size); 160 161 obj = ERR_PTR(-ENODEV); 162 if (HAS_LMEM(dev_priv)) { 163 obj = i915_gem_object_create_lmem(dev_priv, size, 164 I915_BO_ALLOC_CONTIGUOUS); 165 } else { 166 /* 167 * If the FB is too big, just don't use it since fbdev is not very 168 * important and we should probably use that space with FBC or other 169 * features. 170 */ 171 if (size * 2 < dev_priv->stolen_usable_size) 172 obj = i915_gem_object_create_stolen(dev_priv, size); 173 if (IS_ERR(obj)) 174 obj = i915_gem_object_create_shmem(dev_priv, size); 175 } 176 177 if (IS_ERR(obj)) { 178 drm_err(&dev_priv->drm, "failed to allocate framebuffer\n"); 179 return PTR_ERR(obj); 180 } 181 182 fb = intel_framebuffer_create(obj, &mode_cmd); 183 i915_gem_object_put(obj); 184 if (IS_ERR(fb)) 185 return PTR_ERR(fb); 186 187 ifbdev->fb = to_intel_framebuffer(fb); 188 return 0; 189 } 190 191 static int intelfb_create(struct drm_fb_helper *helper, 192 struct drm_fb_helper_surface_size *sizes) 193 { 194 struct intel_fbdev *ifbdev = 195 container_of(helper, struct intel_fbdev, helper); 196 struct intel_framebuffer *intel_fb = ifbdev->fb; 197 struct drm_device *dev = helper->dev; 198 struct drm_i915_private *dev_priv = to_i915(dev); 199 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 200 struct i915_ggtt *ggtt = to_gt(dev_priv)->ggtt; 201 const struct i915_ggtt_view view = { 202 .type = I915_GGTT_VIEW_NORMAL, 203 }; 204 intel_wakeref_t wakeref; 205 struct fb_info *info; 206 struct i915_vma *vma; 207 unsigned long flags = 0; 208 bool prealloc = false; 209 void __iomem *vaddr; 210 struct drm_i915_gem_object *obj; 211 int ret; 212 213 if (intel_fb && 214 (sizes->fb_width > intel_fb->base.width || 215 sizes->fb_height > intel_fb->base.height)) { 216 drm_dbg_kms(&dev_priv->drm, 217 "BIOS fb too small (%dx%d), we require (%dx%d)," 218 " releasing it\n", 219 intel_fb->base.width, intel_fb->base.height, 220 sizes->fb_width, sizes->fb_height); 221 drm_framebuffer_put(&intel_fb->base); 222 intel_fb = ifbdev->fb = NULL; 223 } 224 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { 225 drm_dbg_kms(&dev_priv->drm, 226 "no BIOS fb, allocating a new one\n"); 227 ret = intelfb_alloc(helper, sizes); 228 if (ret) 229 return ret; 230 intel_fb = ifbdev->fb; 231 } else { 232 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); 233 prealloc = true; 234 sizes->fb_width = intel_fb->base.width; 235 sizes->fb_height = intel_fb->base.height; 236 } 237 238 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 239 240 /* Pin the GGTT vma for our access via info->screen_base. 241 * This also validates that any existing fb inherited from the 242 * BIOS is suitable for own access. 243 */ 244 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, 245 &view, false, &flags); 246 if (IS_ERR(vma)) { 247 ret = PTR_ERR(vma); 248 goto out_unlock; 249 } 250 251 info = drm_fb_helper_alloc_fbi(helper); 252 if (IS_ERR(info)) { 253 drm_err(&dev_priv->drm, "Failed to allocate fb_info\n"); 254 ret = PTR_ERR(info); 255 goto out_unpin; 256 } 257 258 ifbdev->helper.fb = &ifbdev->fb->base; 259 260 info->fbops = &intelfb_ops; 261 262 /* setup aperture base/size for vesafb takeover */ 263 obj = intel_fb_obj(&intel_fb->base); 264 if (i915_gem_object_is_lmem(obj)) { 265 struct intel_memory_region *mem = obj->mm.region; 266 267 info->apertures->ranges[0].base = mem->io_start; 268 info->apertures->ranges[0].size = mem->io_size; 269 270 /* Use fbdev's framebuffer from lmem for discrete */ 271 info->fix.smem_start = 272 (unsigned long)(mem->io_start + 273 i915_gem_object_get_dma_address(obj, 0)); 274 info->fix.smem_len = obj->base.size; 275 } else { 276 info->apertures->ranges[0].base = ggtt->gmadr.start; 277 info->apertures->ranges[0].size = ggtt->mappable_end; 278 279 /* Our framebuffer is the entirety of fbdev's system memory */ 280 info->fix.smem_start = 281 (unsigned long)(ggtt->gmadr.start + vma->node.start); 282 info->fix.smem_len = vma->node.size; 283 } 284 285 vaddr = i915_vma_pin_iomap(vma); 286 if (IS_ERR(vaddr)) { 287 drm_err(&dev_priv->drm, 288 "Failed to remap framebuffer into virtual memory\n"); 289 ret = PTR_ERR(vaddr); 290 goto out_unpin; 291 } 292 info->screen_base = vaddr; 293 info->screen_size = vma->node.size; 294 295 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); 296 297 /* If the object is shmemfs backed, it will have given us zeroed pages. 298 * If the object is stolen however, it will be full of whatever 299 * garbage was left in there. 300 */ 301 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc) 302 memset_io(info->screen_base, 0, info->screen_size); 303 304 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 305 306 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", 307 ifbdev->fb->base.width, ifbdev->fb->base.height, 308 i915_ggtt_offset(vma)); 309 ifbdev->vma = vma; 310 ifbdev->vma_flags = flags; 311 312 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 313 vga_switcheroo_client_fb_set(pdev, info); 314 return 0; 315 316 out_unpin: 317 intel_unpin_fb_vma(vma, flags); 318 out_unlock: 319 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 320 return ret; 321 } 322 323 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 324 .fb_probe = intelfb_create, 325 }; 326 327 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 328 { 329 /* We rely on the object-free to release the VMA pinning for 330 * the info->screen_base mmaping. Leaking the VMA is simpler than 331 * trying to rectify all the possible error paths leading here. 332 */ 333 334 drm_fb_helper_fini(&ifbdev->helper); 335 336 if (ifbdev->vma) 337 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); 338 339 if (ifbdev->fb) 340 drm_framebuffer_remove(&ifbdev->fb->base); 341 342 kfree(ifbdev); 343 } 344 345 /* 346 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 347 * The core display code will have read out the current plane configuration, 348 * so we use that to figure out if there's an object for us to use as the 349 * fb, and if so, we re-use it for the fbdev configuration. 350 * 351 * Note we only support a single fb shared across pipes for boot (mostly for 352 * fbcon), so we just find the biggest and use that. 353 */ 354 static bool intel_fbdev_init_bios(struct drm_device *dev, 355 struct intel_fbdev *ifbdev) 356 { 357 struct drm_i915_private *i915 = to_i915(dev); 358 struct intel_framebuffer *fb = NULL; 359 struct intel_crtc *crtc; 360 unsigned int max_size = 0; 361 362 /* Find the largest fb */ 363 for_each_intel_crtc(dev, crtc) { 364 struct intel_crtc_state *crtc_state = 365 to_intel_crtc_state(crtc->base.state); 366 struct intel_plane *plane = 367 to_intel_plane(crtc->base.primary); 368 struct intel_plane_state *plane_state = 369 to_intel_plane_state(plane->base.state); 370 struct drm_i915_gem_object *obj = 371 intel_fb_obj(plane_state->uapi.fb); 372 373 if (!crtc_state->uapi.active) { 374 drm_dbg_kms(&i915->drm, 375 "[CRTC:%d:%s] not active, skipping\n", 376 crtc->base.base.id, crtc->base.name); 377 continue; 378 } 379 380 if (!obj) { 381 drm_dbg_kms(&i915->drm, 382 "[PLANE:%d:%s] no fb, skipping\n", 383 plane->base.base.id, plane->base.name); 384 continue; 385 } 386 387 if (obj->base.size > max_size) { 388 drm_dbg_kms(&i915->drm, 389 "found possible fb from [PLANE:%d:%s]\n", 390 plane->base.base.id, plane->base.name); 391 fb = to_intel_framebuffer(plane_state->uapi.fb); 392 max_size = obj->base.size; 393 } 394 } 395 396 if (!fb) { 397 drm_dbg_kms(&i915->drm, 398 "no active fbs found, not using BIOS config\n"); 399 goto out; 400 } 401 402 /* Now make sure all the pipes will fit into it */ 403 for_each_intel_crtc(dev, crtc) { 404 struct intel_crtc_state *crtc_state = 405 to_intel_crtc_state(crtc->base.state); 406 struct intel_plane *plane = 407 to_intel_plane(crtc->base.primary); 408 unsigned int cur_size; 409 410 if (!crtc_state->uapi.active) { 411 drm_dbg_kms(&i915->drm, 412 "[CRTC:%d:%s] not active, skipping\n", 413 crtc->base.base.id, crtc->base.name); 414 continue; 415 } 416 417 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 418 plane->base.base.id, plane->base.name); 419 420 /* 421 * See if the plane fb we found above will fit on this 422 * pipe. Note we need to use the selected fb's pitch and bpp 423 * rather than the current pipe's, since they differ. 424 */ 425 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 426 cur_size = cur_size * fb->base.format->cpp[0]; 427 if (fb->base.pitches[0] < cur_size) { 428 drm_dbg_kms(&i915->drm, 429 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 430 plane->base.base.id, plane->base.name, 431 cur_size, fb->base.pitches[0]); 432 fb = NULL; 433 break; 434 } 435 436 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 437 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 438 cur_size *= fb->base.pitches[0]; 439 drm_dbg_kms(&i915->drm, 440 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 441 crtc->base.base.id, crtc->base.name, 442 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 443 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 444 fb->base.format->cpp[0] * 8, 445 cur_size); 446 447 if (cur_size > max_size) { 448 drm_dbg_kms(&i915->drm, 449 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 450 plane->base.base.id, plane->base.name, 451 cur_size, max_size); 452 fb = NULL; 453 break; 454 } 455 456 drm_dbg_kms(&i915->drm, 457 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 458 plane->base.base.id, plane->base.name, 459 max_size, cur_size); 460 } 461 462 if (!fb) { 463 drm_dbg_kms(&i915->drm, 464 "BIOS fb not suitable for all pipes, not using\n"); 465 goto out; 466 } 467 468 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 469 ifbdev->fb = fb; 470 471 drm_framebuffer_get(&ifbdev->fb->base); 472 473 /* Final pass to check if any active pipes don't have fbs */ 474 for_each_intel_crtc(dev, crtc) { 475 struct intel_crtc_state *crtc_state = 476 to_intel_crtc_state(crtc->base.state); 477 struct intel_plane *plane = 478 to_intel_plane(crtc->base.primary); 479 struct intel_plane_state *plane_state = 480 to_intel_plane_state(plane->base.state); 481 482 if (!crtc_state->uapi.active) 483 continue; 484 485 drm_WARN(dev, !plane_state->uapi.fb, 486 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 487 plane->base.base.id, plane->base.name); 488 } 489 490 491 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 492 return true; 493 494 out: 495 496 return false; 497 } 498 499 static void intel_fbdev_suspend_worker(struct work_struct *work) 500 { 501 intel_fbdev_set_suspend(&container_of(work, 502 struct drm_i915_private, 503 fbdev_suspend_work)->drm, 504 FBINFO_STATE_RUNNING, 505 true); 506 } 507 508 int intel_fbdev_init(struct drm_device *dev) 509 { 510 struct drm_i915_private *dev_priv = to_i915(dev); 511 struct intel_fbdev *ifbdev; 512 int ret; 513 514 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 515 return -ENODEV; 516 517 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 518 if (ifbdev == NULL) 519 return -ENOMEM; 520 521 mutex_init(&ifbdev->hpd_lock); 522 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 523 524 if (!intel_fbdev_init_bios(dev, ifbdev)) 525 ifbdev->preferred_bpp = 32; 526 527 ret = drm_fb_helper_init(dev, &ifbdev->helper); 528 if (ret) { 529 kfree(ifbdev); 530 return ret; 531 } 532 533 dev_priv->fbdev = ifbdev; 534 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 535 536 return 0; 537 } 538 539 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 540 { 541 struct intel_fbdev *ifbdev = data; 542 543 /* Due to peculiar init order wrt to hpd handling this is separate. */ 544 if (drm_fb_helper_initial_config(&ifbdev->helper, 545 ifbdev->preferred_bpp)) 546 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 547 } 548 549 void intel_fbdev_initial_config_async(struct drm_device *dev) 550 { 551 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 552 553 if (!ifbdev) 554 return; 555 556 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 557 } 558 559 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 560 { 561 if (!ifbdev->cookie) 562 return; 563 564 /* Only serialises with all preceding async calls, hence +1 */ 565 async_synchronize_cookie(ifbdev->cookie + 1); 566 ifbdev->cookie = 0; 567 } 568 569 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 570 { 571 struct intel_fbdev *ifbdev = dev_priv->fbdev; 572 573 if (!ifbdev) 574 return; 575 576 cancel_work_sync(&dev_priv->fbdev_suspend_work); 577 if (!current_is_async()) 578 intel_fbdev_sync(ifbdev); 579 580 drm_fb_helper_unregister_fbi(&ifbdev->helper); 581 } 582 583 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 584 { 585 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev); 586 587 if (!ifbdev) 588 return; 589 590 intel_fbdev_destroy(ifbdev); 591 } 592 593 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 594 * processing, fbdev will perform a full connector reprobe if a hotplug event 595 * was received while HPD was suspended. 596 */ 597 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 598 { 599 struct intel_fbdev *ifbdev = i915->fbdev; 600 bool send_hpd = false; 601 602 mutex_lock(&ifbdev->hpd_lock); 603 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 604 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 605 ifbdev->hpd_waiting = false; 606 mutex_unlock(&ifbdev->hpd_lock); 607 608 if (send_hpd) { 609 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 610 drm_fb_helper_hotplug_event(&ifbdev->helper); 611 } 612 } 613 614 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 615 { 616 struct drm_i915_private *dev_priv = to_i915(dev); 617 struct intel_fbdev *ifbdev = dev_priv->fbdev; 618 struct fb_info *info; 619 620 if (!ifbdev || !ifbdev->vma) 621 return; 622 623 info = ifbdev->helper.fbdev; 624 625 if (synchronous) { 626 /* Flush any pending work to turn the console on, and then 627 * wait to turn it off. It must be synchronous as we are 628 * about to suspend or unload the driver. 629 * 630 * Note that from within the work-handler, we cannot flush 631 * ourselves, so only flush outstanding work upon suspend! 632 */ 633 if (state != FBINFO_STATE_RUNNING) 634 flush_work(&dev_priv->fbdev_suspend_work); 635 636 console_lock(); 637 } else { 638 /* 639 * The console lock can be pretty contented on resume due 640 * to all the printk activity. Try to keep it out of the hot 641 * path of resume if possible. 642 */ 643 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 644 if (!console_trylock()) { 645 /* Don't block our own workqueue as this can 646 * be run in parallel with other i915.ko tasks. 647 */ 648 schedule_work(&dev_priv->fbdev_suspend_work); 649 return; 650 } 651 } 652 653 /* On resume from hibernation: If the object is shmemfs backed, it has 654 * been restored from swap. If the object is stolen however, it will be 655 * full of whatever garbage was left in there. 656 */ 657 if (state == FBINFO_STATE_RUNNING && 658 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 659 memset_io(info->screen_base, 0, info->screen_size); 660 661 drm_fb_helper_set_suspend(&ifbdev->helper, state); 662 console_unlock(); 663 664 intel_fbdev_hpd_set_suspend(dev_priv, state); 665 } 666 667 void intel_fbdev_output_poll_changed(struct drm_device *dev) 668 { 669 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 670 bool send_hpd; 671 672 if (!ifbdev) 673 return; 674 675 intel_fbdev_sync(ifbdev); 676 677 mutex_lock(&ifbdev->hpd_lock); 678 send_hpd = !ifbdev->hpd_suspended; 679 ifbdev->hpd_waiting = true; 680 mutex_unlock(&ifbdev->hpd_lock); 681 682 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 683 drm_fb_helper_hotplug_event(&ifbdev->helper); 684 } 685 686 void intel_fbdev_restore_mode(struct drm_device *dev) 687 { 688 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 689 690 if (!ifbdev) 691 return; 692 693 intel_fbdev_sync(ifbdev); 694 if (!ifbdev->vma) 695 return; 696 697 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 698 intel_fbdev_invalidate(ifbdev); 699 } 700 701 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) 702 { 703 if (!fbdev || !fbdev->helper.fb) 704 return NULL; 705 706 return to_intel_framebuffer(fbdev->helper.fb); 707 } 708