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 static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) 54 { 55 return ifbdev->fb->frontbuffer; 56 } 57 58 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 59 { 60 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU); 61 } 62 63 static int intel_fbdev_set_par(struct fb_info *info) 64 { 65 struct drm_fb_helper *fb_helper = info->par; 66 struct intel_fbdev *ifbdev = 67 container_of(fb_helper, struct intel_fbdev, helper); 68 int ret; 69 70 ret = drm_fb_helper_set_par(info); 71 if (ret == 0) 72 intel_fbdev_invalidate(ifbdev); 73 74 return ret; 75 } 76 77 static int intel_fbdev_blank(int blank, struct fb_info *info) 78 { 79 struct drm_fb_helper *fb_helper = info->par; 80 struct intel_fbdev *ifbdev = 81 container_of(fb_helper, struct intel_fbdev, helper); 82 int ret; 83 84 ret = drm_fb_helper_blank(blank, info); 85 if (ret == 0) 86 intel_fbdev_invalidate(ifbdev); 87 88 return ret; 89 } 90 91 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 92 struct fb_info *info) 93 { 94 struct drm_fb_helper *fb_helper = info->par; 95 struct intel_fbdev *ifbdev = 96 container_of(fb_helper, struct intel_fbdev, helper); 97 int ret; 98 99 ret = drm_fb_helper_pan_display(var, info); 100 if (ret == 0) 101 intel_fbdev_invalidate(ifbdev); 102 103 return ret; 104 } 105 106 static const struct fb_ops intelfb_ops = { 107 .owner = THIS_MODULE, 108 DRM_FB_HELPER_DEFAULT_OPS, 109 .fb_set_par = intel_fbdev_set_par, 110 .fb_fillrect = drm_fb_helper_cfb_fillrect, 111 .fb_copyarea = drm_fb_helper_cfb_copyarea, 112 .fb_imageblit = drm_fb_helper_cfb_imageblit, 113 .fb_pan_display = intel_fbdev_pan_display, 114 .fb_blank = intel_fbdev_blank, 115 }; 116 117 static int intelfb_alloc(struct drm_fb_helper *helper, 118 struct drm_fb_helper_surface_size *sizes) 119 { 120 struct intel_fbdev *ifbdev = 121 container_of(helper, struct intel_fbdev, helper); 122 struct drm_framebuffer *fb; 123 struct drm_device *dev = helper->dev; 124 struct drm_i915_private *dev_priv = to_i915(dev); 125 struct drm_mode_fb_cmd2 mode_cmd = {}; 126 struct drm_i915_gem_object *obj; 127 int size; 128 129 /* we don't do packed 24bpp */ 130 if (sizes->surface_bpp == 24) 131 sizes->surface_bpp = 32; 132 133 mode_cmd.width = sizes->surface_width; 134 mode_cmd.height = sizes->surface_height; 135 136 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 137 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 138 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 139 sizes->surface_depth); 140 141 size = mode_cmd.pitches[0] * mode_cmd.height; 142 size = PAGE_ALIGN(size); 143 144 obj = ERR_PTR(-ENODEV); 145 if (HAS_LMEM(dev_priv)) { 146 obj = i915_gem_object_create_lmem(dev_priv, size, 147 I915_BO_ALLOC_CONTIGUOUS); 148 } else { 149 /* 150 * If the FB is too big, just don't use it since fbdev is not very 151 * important and we should probably use that space with FBC or other 152 * features. 153 */ 154 if (size * 2 < dev_priv->stolen_usable_size) 155 obj = i915_gem_object_create_stolen(dev_priv, size); 156 if (IS_ERR(obj)) 157 obj = i915_gem_object_create_shmem(dev_priv, size); 158 } 159 160 if (IS_ERR(obj)) { 161 drm_err(&dev_priv->drm, "failed to allocate framebuffer\n"); 162 return PTR_ERR(obj); 163 } 164 165 fb = intel_framebuffer_create(obj, &mode_cmd); 166 i915_gem_object_put(obj); 167 if (IS_ERR(fb)) 168 return PTR_ERR(fb); 169 170 ifbdev->fb = to_intel_framebuffer(fb); 171 return 0; 172 } 173 174 static int intelfb_create(struct drm_fb_helper *helper, 175 struct drm_fb_helper_surface_size *sizes) 176 { 177 struct intel_fbdev *ifbdev = 178 container_of(helper, struct intel_fbdev, helper); 179 struct intel_framebuffer *intel_fb = ifbdev->fb; 180 struct drm_device *dev = helper->dev; 181 struct drm_i915_private *dev_priv = to_i915(dev); 182 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 183 struct i915_ggtt *ggtt = &dev_priv->ggtt; 184 const struct i915_ggtt_view view = { 185 .type = I915_GGTT_VIEW_NORMAL, 186 }; 187 intel_wakeref_t wakeref; 188 struct fb_info *info; 189 struct i915_vma *vma; 190 unsigned long flags = 0; 191 bool prealloc = false; 192 void __iomem *vaddr; 193 struct drm_i915_gem_object *obj; 194 int ret; 195 196 if (intel_fb && 197 (sizes->fb_width > intel_fb->base.width || 198 sizes->fb_height > intel_fb->base.height)) { 199 drm_dbg_kms(&dev_priv->drm, 200 "BIOS fb too small (%dx%d), we require (%dx%d)," 201 " releasing it\n", 202 intel_fb->base.width, intel_fb->base.height, 203 sizes->fb_width, sizes->fb_height); 204 drm_framebuffer_put(&intel_fb->base); 205 intel_fb = ifbdev->fb = NULL; 206 } 207 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { 208 drm_dbg_kms(&dev_priv->drm, 209 "no BIOS fb, allocating a new one\n"); 210 ret = intelfb_alloc(helper, sizes); 211 if (ret) 212 return ret; 213 intel_fb = ifbdev->fb; 214 } else { 215 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); 216 prealloc = true; 217 sizes->fb_width = intel_fb->base.width; 218 sizes->fb_height = intel_fb->base.height; 219 } 220 221 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 222 223 /* Pin the GGTT vma for our access via info->screen_base. 224 * This also validates that any existing fb inherited from the 225 * BIOS is suitable for own access. 226 */ 227 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, 228 &view, false, &flags); 229 if (IS_ERR(vma)) { 230 ret = PTR_ERR(vma); 231 goto out_unlock; 232 } 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 intel_crtc *crtc; 343 unsigned int max_size = 0; 344 345 /* Find the largest fb */ 346 for_each_intel_crtc(dev, crtc) { 347 struct intel_crtc_state *crtc_state = 348 to_intel_crtc_state(crtc->base.state); 349 struct intel_plane *plane = 350 to_intel_plane(crtc->base.primary); 351 struct intel_plane_state *plane_state = 352 to_intel_plane_state(plane->base.state); 353 struct drm_i915_gem_object *obj = 354 intel_fb_obj(plane_state->uapi.fb); 355 356 if (!crtc_state->uapi.active) { 357 drm_dbg_kms(&i915->drm, 358 "[CRTC:%d:%s] not active, skipping\n", 359 crtc->base.base.id, crtc->base.name); 360 continue; 361 } 362 363 if (!obj) { 364 drm_dbg_kms(&i915->drm, 365 "[PLANE:%d:%s] no fb, skipping\n", 366 plane->base.base.id, plane->base.name); 367 continue; 368 } 369 370 if (obj->base.size > max_size) { 371 drm_dbg_kms(&i915->drm, 372 "found possible fb from [PLANE:%d:%s]\n", 373 plane->base.base.id, plane->base.name); 374 fb = to_intel_framebuffer(plane_state->uapi.fb); 375 max_size = obj->base.size; 376 } 377 } 378 379 if (!fb) { 380 drm_dbg_kms(&i915->drm, 381 "no active fbs found, not using BIOS config\n"); 382 goto out; 383 } 384 385 /* Now make sure all the pipes will fit into it */ 386 for_each_intel_crtc(dev, crtc) { 387 struct intel_crtc_state *crtc_state = 388 to_intel_crtc_state(crtc->base.state); 389 struct intel_plane *plane = 390 to_intel_plane(crtc->base.primary); 391 unsigned int cur_size; 392 393 if (!crtc_state->uapi.active) { 394 drm_dbg_kms(&i915->drm, 395 "[CRTC:%d:%s] not active, skipping\n", 396 crtc->base.base.id, crtc->base.name); 397 continue; 398 } 399 400 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 401 plane->base.base.id, plane->base.name); 402 403 /* 404 * See if the plane fb we found above will fit on this 405 * pipe. Note we need to use the selected fb's pitch and bpp 406 * rather than the current pipe's, since they differ. 407 */ 408 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 409 cur_size = cur_size * fb->base.format->cpp[0]; 410 if (fb->base.pitches[0] < cur_size) { 411 drm_dbg_kms(&i915->drm, 412 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 413 plane->base.base.id, plane->base.name, 414 cur_size, fb->base.pitches[0]); 415 fb = NULL; 416 break; 417 } 418 419 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 420 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 421 cur_size *= fb->base.pitches[0]; 422 drm_dbg_kms(&i915->drm, 423 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 424 crtc->base.base.id, crtc->base.name, 425 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 426 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 427 fb->base.format->cpp[0] * 8, 428 cur_size); 429 430 if (cur_size > max_size) { 431 drm_dbg_kms(&i915->drm, 432 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 433 plane->base.base.id, plane->base.name, 434 cur_size, max_size); 435 fb = NULL; 436 break; 437 } 438 439 drm_dbg_kms(&i915->drm, 440 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 441 plane->base.base.id, plane->base.name, 442 max_size, cur_size); 443 } 444 445 if (!fb) { 446 drm_dbg_kms(&i915->drm, 447 "BIOS fb not suitable for all pipes, not using\n"); 448 goto out; 449 } 450 451 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 452 ifbdev->fb = fb; 453 454 drm_framebuffer_get(&ifbdev->fb->base); 455 456 /* Final pass to check if any active pipes don't have fbs */ 457 for_each_intel_crtc(dev, crtc) { 458 struct intel_crtc_state *crtc_state = 459 to_intel_crtc_state(crtc->base.state); 460 struct intel_plane *plane = 461 to_intel_plane(crtc->base.primary); 462 struct intel_plane_state *plane_state = 463 to_intel_plane_state(plane->base.state); 464 465 if (!crtc_state->uapi.active) 466 continue; 467 468 drm_WARN(dev, !plane_state->uapi.fb, 469 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 470 plane->base.base.id, plane->base.name); 471 } 472 473 474 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 475 return true; 476 477 out: 478 479 return false; 480 } 481 482 static void intel_fbdev_suspend_worker(struct work_struct *work) 483 { 484 intel_fbdev_set_suspend(&container_of(work, 485 struct drm_i915_private, 486 fbdev_suspend_work)->drm, 487 FBINFO_STATE_RUNNING, 488 true); 489 } 490 491 int intel_fbdev_init(struct drm_device *dev) 492 { 493 struct drm_i915_private *dev_priv = to_i915(dev); 494 struct intel_fbdev *ifbdev; 495 int ret; 496 497 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 498 return -ENODEV; 499 500 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 501 if (ifbdev == NULL) 502 return -ENOMEM; 503 504 mutex_init(&ifbdev->hpd_lock); 505 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 506 507 if (!intel_fbdev_init_bios(dev, ifbdev)) 508 ifbdev->preferred_bpp = 32; 509 510 ret = drm_fb_helper_init(dev, &ifbdev->helper); 511 if (ret) { 512 kfree(ifbdev); 513 return ret; 514 } 515 516 dev_priv->fbdev = ifbdev; 517 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 518 519 return 0; 520 } 521 522 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 523 { 524 struct intel_fbdev *ifbdev = data; 525 526 /* Due to peculiar init order wrt to hpd handling this is separate. */ 527 if (drm_fb_helper_initial_config(&ifbdev->helper, 528 ifbdev->preferred_bpp)) 529 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 530 } 531 532 void intel_fbdev_initial_config_async(struct drm_device *dev) 533 { 534 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 535 536 if (!ifbdev) 537 return; 538 539 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 540 } 541 542 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 543 { 544 if (!ifbdev->cookie) 545 return; 546 547 /* Only serialises with all preceding async calls, hence +1 */ 548 async_synchronize_cookie(ifbdev->cookie + 1); 549 ifbdev->cookie = 0; 550 } 551 552 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 553 { 554 struct intel_fbdev *ifbdev = dev_priv->fbdev; 555 556 if (!ifbdev) 557 return; 558 559 cancel_work_sync(&dev_priv->fbdev_suspend_work); 560 if (!current_is_async()) 561 intel_fbdev_sync(ifbdev); 562 563 drm_fb_helper_unregister_fbi(&ifbdev->helper); 564 } 565 566 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 567 { 568 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev); 569 570 if (!ifbdev) 571 return; 572 573 intel_fbdev_destroy(ifbdev); 574 } 575 576 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 577 * processing, fbdev will perform a full connector reprobe if a hotplug event 578 * was received while HPD was suspended. 579 */ 580 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 581 { 582 struct intel_fbdev *ifbdev = i915->fbdev; 583 bool send_hpd = false; 584 585 mutex_lock(&ifbdev->hpd_lock); 586 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 587 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 588 ifbdev->hpd_waiting = false; 589 mutex_unlock(&ifbdev->hpd_lock); 590 591 if (send_hpd) { 592 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 593 drm_fb_helper_hotplug_event(&ifbdev->helper); 594 } 595 } 596 597 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 598 { 599 struct drm_i915_private *dev_priv = to_i915(dev); 600 struct intel_fbdev *ifbdev = dev_priv->fbdev; 601 struct fb_info *info; 602 603 if (!ifbdev || !ifbdev->vma) 604 return; 605 606 info = ifbdev->helper.fbdev; 607 608 if (synchronous) { 609 /* Flush any pending work to turn the console on, and then 610 * wait to turn it off. It must be synchronous as we are 611 * about to suspend or unload the driver. 612 * 613 * Note that from within the work-handler, we cannot flush 614 * ourselves, so only flush outstanding work upon suspend! 615 */ 616 if (state != FBINFO_STATE_RUNNING) 617 flush_work(&dev_priv->fbdev_suspend_work); 618 619 console_lock(); 620 } else { 621 /* 622 * The console lock can be pretty contented on resume due 623 * to all the printk activity. Try to keep it out of the hot 624 * path of resume if possible. 625 */ 626 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 627 if (!console_trylock()) { 628 /* Don't block our own workqueue as this can 629 * be run in parallel with other i915.ko tasks. 630 */ 631 schedule_work(&dev_priv->fbdev_suspend_work); 632 return; 633 } 634 } 635 636 /* On resume from hibernation: If the object is shmemfs backed, it has 637 * been restored from swap. If the object is stolen however, it will be 638 * full of whatever garbage was left in there. 639 */ 640 if (state == FBINFO_STATE_RUNNING && 641 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 642 memset_io(info->screen_base, 0, info->screen_size); 643 644 drm_fb_helper_set_suspend(&ifbdev->helper, state); 645 console_unlock(); 646 647 intel_fbdev_hpd_set_suspend(dev_priv, state); 648 } 649 650 void intel_fbdev_output_poll_changed(struct drm_device *dev) 651 { 652 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 653 bool send_hpd; 654 655 if (!ifbdev) 656 return; 657 658 intel_fbdev_sync(ifbdev); 659 660 mutex_lock(&ifbdev->hpd_lock); 661 send_hpd = !ifbdev->hpd_suspended; 662 ifbdev->hpd_waiting = true; 663 mutex_unlock(&ifbdev->hpd_lock); 664 665 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 666 drm_fb_helper_hotplug_event(&ifbdev->helper); 667 } 668 669 void intel_fbdev_restore_mode(struct drm_device *dev) 670 { 671 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 672 673 if (!ifbdev) 674 return; 675 676 intel_fbdev_sync(ifbdev); 677 if (!ifbdev->vma) 678 return; 679 680 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 681 intel_fbdev_invalidate(ifbdev); 682 } 683