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