1 /* $NetBSD: intel_fbdev.c,v 1.10 2021/12/20 20:34:58 chs Exp $ */ 2 3 /* 4 * Copyright 2007 David Airlie 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * David Airlie 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: intel_fbdev.c,v 1.10 2021/12/20 20:34:58 chs Exp $"); 31 32 #include <linux/async.h> 33 #include <linux/console.h> 34 #include <linux/delay.h> 35 #include <linux/errno.h> 36 #include <linux/init.h> 37 #include <linux/kernel.h> 38 #include <linux/mm.h> 39 #include <linux/module.h> 40 #include <linux/string.h> 41 #include <linux/sysrq.h> 42 #include <linux/tty.h> 43 #include <linux/vga_switcheroo.h> 44 45 #include <drm/drm_crtc.h> 46 #include <drm/drm_fb_helper.h> 47 #include <drm/drm_fourcc.h> 48 #include <drm/i915_drm.h> 49 50 #include "i915_drv.h" 51 #include "intel_display_types.h" 52 #include "intel_fbdev.h" 53 #include "intel_frontbuffer.h" 54 55 static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev) 56 { 57 return ifbdev->fb->frontbuffer; 58 } 59 60 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 61 { 62 intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU); 63 } 64 65 #ifdef __NetBSD__ 66 #include "intelfb.h" 67 #include <linux/nbsd-namespace.h> 68 #endif 69 70 #ifndef __NetBSD__ 71 static int intel_fbdev_set_par(struct fb_info *info) 72 { 73 struct drm_fb_helper *fb_helper = info->par; 74 struct intel_fbdev *ifbdev = 75 container_of(fb_helper, struct intel_fbdev, helper); 76 int ret; 77 78 ret = drm_fb_helper_set_par(info); 79 if (ret == 0) 80 intel_fbdev_invalidate(ifbdev); 81 82 return ret; 83 } 84 85 static int intel_fbdev_blank(int blank, struct fb_info *info) 86 { 87 struct drm_fb_helper *fb_helper = info->par; 88 struct intel_fbdev *ifbdev = 89 container_of(fb_helper, struct intel_fbdev, helper); 90 int ret; 91 92 ret = drm_fb_helper_blank(blank, info); 93 if (ret == 0) 94 intel_fbdev_invalidate(ifbdev); 95 96 return ret; 97 } 98 99 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 100 struct fb_info *info) 101 { 102 struct drm_fb_helper *fb_helper = info->par; 103 struct intel_fbdev *ifbdev = 104 container_of(fb_helper, struct intel_fbdev, helper); 105 int ret; 106 107 ret = drm_fb_helper_pan_display(var, info); 108 if (ret == 0) 109 intel_fbdev_invalidate(ifbdev); 110 111 return ret; 112 } 113 114 static const struct fb_ops intelfb_ops = { 115 .owner = THIS_MODULE, 116 DRM_FB_HELPER_DEFAULT_OPS, 117 .fb_set_par = intel_fbdev_set_par, 118 .fb_fillrect = drm_fb_helper_cfb_fillrect, 119 .fb_copyarea = drm_fb_helper_cfb_copyarea, 120 .fb_imageblit = drm_fb_helper_cfb_imageblit, 121 .fb_pan_display = intel_fbdev_pan_display, 122 .fb_blank = intel_fbdev_blank, 123 }; 124 #endif 125 126 static int intelfb_alloc(struct drm_fb_helper *helper, 127 struct drm_fb_helper_surface_size *sizes) 128 { 129 struct intel_fbdev *ifbdev = 130 container_of(helper, struct intel_fbdev, helper); 131 struct drm_framebuffer *fb; 132 struct drm_device *dev = helper->dev; 133 struct drm_i915_private *dev_priv = to_i915(dev); 134 struct drm_mode_fb_cmd2 mode_cmd = {}; 135 struct drm_i915_gem_object *obj; 136 int size; 137 138 /* we don't do packed 24bpp */ 139 if (sizes->surface_bpp == 24) 140 sizes->surface_bpp = 32; 141 142 mode_cmd.width = sizes->surface_width; 143 mode_cmd.height = sizes->surface_height; 144 145 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 146 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 147 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 148 sizes->surface_depth); 149 150 size = mode_cmd.pitches[0] * mode_cmd.height; 151 size = PAGE_ALIGN(size); 152 153 /* If the FB is too big, just don't use it since fbdev is not very 154 * important and we should probably use that space with FBC or other 155 * features. */ 156 obj = ERR_PTR(-ENODEV); 157 if (size * 2 < dev_priv->stolen_usable_size) 158 obj = i915_gem_object_create_stolen(dev_priv, size); 159 if (IS_ERR(obj)) 160 obj = i915_gem_object_create_shmem(dev_priv, size); 161 if (IS_ERR(obj)) { 162 DRM_ERROR("failed to allocate framebuffer\n"); 163 return PTR_ERR(obj); 164 } 165 166 fb = intel_framebuffer_create(obj, &mode_cmd); 167 i915_gem_object_put(obj); 168 if (IS_ERR(fb)) 169 return PTR_ERR(fb); 170 171 ifbdev->fb = to_intel_framebuffer(fb); 172 return 0; 173 } 174 175 #ifdef __NetBSD__ 176 # define __iomem __i915_vma_iomem 177 #endif 178 179 static int intelfb_create(struct drm_fb_helper *helper, 180 struct drm_fb_helper_surface_size *sizes) 181 { 182 struct intel_fbdev *ifbdev = 183 container_of(helper, struct intel_fbdev, helper); 184 struct intel_framebuffer *intel_fb = ifbdev->fb; 185 struct drm_device *dev = helper->dev; 186 struct drm_i915_private *dev_priv = to_i915(dev); 187 struct pci_dev *pdev = dev_priv->drm.pdev; 188 struct i915_ggtt *ggtt = &dev_priv->ggtt; 189 const struct i915_ggtt_view view = { 190 .type = I915_GGTT_VIEW_NORMAL, 191 }; 192 intel_wakeref_t wakeref; 193 #ifndef __NetBSD__ 194 struct fb_info *info; 195 #endif 196 struct i915_vma *vma; 197 unsigned long flags = 0; 198 bool prealloc = false; 199 void __iomem *vaddr; 200 int ret; 201 202 if (intel_fb && 203 (sizes->fb_width > intel_fb->base.width || 204 sizes->fb_height > intel_fb->base.height)) { 205 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 206 " releasing it\n", 207 intel_fb->base.width, intel_fb->base.height, 208 sizes->fb_width, sizes->fb_height); 209 drm_framebuffer_put(&intel_fb->base); 210 intel_fb = ifbdev->fb = NULL; 211 } 212 if (!intel_fb || WARN_ON(!intel_fb_obj(&intel_fb->base))) { 213 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 214 ret = intelfb_alloc(helper, sizes); 215 if (ret) 216 return ret; 217 intel_fb = ifbdev->fb; 218 } else { 219 DRM_DEBUG_KMS("re-using BIOS fb\n"); 220 prealloc = true; 221 sizes->fb_width = intel_fb->base.width; 222 sizes->fb_height = intel_fb->base.height; 223 } 224 225 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 226 227 /* Pin the GGTT vma for our access via info->screen_base. 228 * This also validates that any existing fb inherited from the 229 * BIOS is suitable for own access. 230 */ 231 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, 232 &view, false, &flags); 233 if (IS_ERR(vma)) { 234 ret = PTR_ERR(vma); 235 goto out_unlock; 236 } 237 238 intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_DIRTYFB); 239 240 #ifdef __NetBSD__ 241 { 242 static const struct intelfb_attach_args zero_ifa; 243 struct intelfb_attach_args ifa = zero_ifa; 244 245 __USE(ggtt); 246 __USE(pdev); 247 248 vaddr = i915_vma_pin_iomap(vma); 249 if (IS_ERR(vaddr)) { 250 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 251 ret = PTR_ERR(vaddr); 252 goto out_unpin; 253 } 254 255 if (vma->obj->stolen && !prealloc) 256 memset_io(vaddr, 0, vma->node.size); 257 258 ifa.ifa_drm_dev = dev; 259 ifa.ifa_fb_helper = helper; 260 ifa.ifa_fb_sizes = *sizes; 261 ifa.ifa_fb_vaddr = vaddr; 262 263 /* 264 * XXX Should do this asynchronously, since we hold 265 * dev->struct_mutex. 266 */ 267 KERNEL_LOCK(1, NULL); 268 helper->fbdev = config_found(dev->dev, &ifa, NULL, 269 CFARGS(.iattr = "intelfbbus")); 270 KERNEL_UNLOCK_ONE(NULL); 271 if (helper->fbdev == NULL) { 272 DRM_ERROR("unable to attach intelfb\n"); 273 ret = -ENXIO; 274 goto out_unpin; 275 } 276 ifbdev->helper.fb = &ifbdev->fb->base; 277 } 278 #else 279 info = drm_fb_helper_alloc_fbi(helper); 280 if (IS_ERR(info)) { 281 DRM_ERROR("Failed to allocate fb_info\n"); 282 ret = PTR_ERR(info); 283 goto out_unpin; 284 } 285 286 ifbdev->helper.fb = &ifbdev->fb->base; 287 288 info->fbops = &intelfb_ops; 289 290 /* setup aperture base/size for vesafb takeover */ 291 info->apertures->ranges[0].base = ggtt->gmadr.start; 292 info->apertures->ranges[0].size = ggtt->mappable_end; 293 294 /* Our framebuffer is the entirety of fbdev's system memory */ 295 info->fix.smem_start = 296 (unsigned long)(ggtt->gmadr.start + vma->node.start); 297 info->fix.smem_len = vma->node.size; 298 299 vaddr = i915_vma_pin_iomap(vma); 300 if (IS_ERR(vaddr)) { 301 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 302 ret = PTR_ERR(vaddr); 303 goto out_unpin; 304 } 305 info->screen_base = vaddr; 306 info->screen_size = vma->node.size; 307 308 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); 309 310 /* If the object is shmemfs backed, it will have given us zeroed pages. 311 * If the object is stolen however, it will be full of whatever 312 * garbage was left in there. 313 */ 314 if (vma->obj->stolen && !prealloc) 315 memset_io(info->screen_base, 0, info->screen_size); 316 #endif 317 318 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 319 320 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08"PRIx32"\n", 321 ifbdev->fb->base.width, ifbdev->fb->base.height, 322 i915_ggtt_offset(vma)); 323 ifbdev->vma = vma; 324 ifbdev->vma_flags = flags; 325 326 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 327 #ifndef __NetBSD__ 328 vga_switcheroo_client_fb_set(pdev, info); 329 #endif 330 return 0; 331 332 out_unpin: 333 intel_unpin_fb_vma(vma, flags); 334 out_unlock: 335 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 336 return ret; 337 } 338 339 #ifdef __NetBSD__ 340 # undef __iomem 341 #endif 342 343 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 344 .fb_probe = intelfb_create, 345 }; 346 347 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 348 { 349 /* We rely on the object-free to release the VMA pinning for 350 * the info->screen_base mmaping. Leaking the VMA is simpler than 351 * trying to rectify all the possible error paths leading here. 352 */ 353 354 drm_fb_helper_fini(&ifbdev->helper); 355 356 if (ifbdev->vma) 357 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); 358 359 if (ifbdev->fb) 360 drm_framebuffer_remove(&ifbdev->fb->base); 361 362 mutex_destroy(&ifbdev->hpd_lock); 363 364 kfree(ifbdev); 365 } 366 367 /* 368 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 369 * The core display code will have read out the current plane configuration, 370 * so we use that to figure out if there's an object for us to use as the 371 * fb, and if so, we re-use it for the fbdev configuration. 372 * 373 * Note we only support a single fb shared across pipes for boot (mostly for 374 * fbcon), so we just find the biggest and use that. 375 */ 376 static bool intel_fbdev_init_bios(struct drm_device *dev, 377 struct intel_fbdev *ifbdev) 378 { 379 struct intel_framebuffer *fb = NULL; 380 struct drm_crtc *crtc; 381 struct intel_crtc *intel_crtc; 382 unsigned int max_size = 0; 383 384 /* Find the largest fb */ 385 for_each_crtc(dev, crtc) { 386 struct drm_i915_gem_object *obj = 387 intel_fb_obj(crtc->primary->state->fb); 388 intel_crtc = to_intel_crtc(crtc); 389 390 if (!crtc->state->active || !obj) { 391 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 392 pipe_name(intel_crtc->pipe)); 393 continue; 394 } 395 396 if (obj->base.size > max_size) { 397 DRM_DEBUG_KMS("found possible fb from plane %c\n", 398 pipe_name(intel_crtc->pipe)); 399 fb = to_intel_framebuffer(crtc->primary->state->fb); 400 max_size = obj->base.size; 401 } 402 } 403 404 if (!fb) { 405 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 406 goto out; 407 } 408 409 /* Now make sure all the pipes will fit into it */ 410 for_each_crtc(dev, crtc) { 411 unsigned int cur_size; 412 413 intel_crtc = to_intel_crtc(crtc); 414 415 if (!crtc->state->active) { 416 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 417 pipe_name(intel_crtc->pipe)); 418 continue; 419 } 420 421 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 422 pipe_name(intel_crtc->pipe)); 423 424 /* 425 * See if the plane fb we found above will fit on this 426 * pipe. Note we need to use the selected fb's pitch and bpp 427 * rather than the current pipe's, since they differ. 428 */ 429 cur_size = crtc->state->adjusted_mode.crtc_hdisplay; 430 cur_size = cur_size * fb->base.format->cpp[0]; 431 if (fb->base.pitches[0] < cur_size) { 432 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 433 pipe_name(intel_crtc->pipe), 434 cur_size, fb->base.pitches[0]); 435 fb = NULL; 436 break; 437 } 438 439 cur_size = crtc->state->adjusted_mode.crtc_vdisplay; 440 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 441 cur_size *= fb->base.pitches[0]; 442 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 443 pipe_name(intel_crtc->pipe), 444 crtc->state->adjusted_mode.crtc_hdisplay, 445 crtc->state->adjusted_mode.crtc_vdisplay, 446 fb->base.format->cpp[0] * 8, 447 cur_size); 448 449 if (cur_size > max_size) { 450 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 451 pipe_name(intel_crtc->pipe), 452 cur_size, max_size); 453 fb = NULL; 454 break; 455 } 456 457 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 458 pipe_name(intel_crtc->pipe), 459 max_size, cur_size); 460 } 461 462 if (!fb) { 463 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 464 goto out; 465 } 466 467 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 468 ifbdev->fb = fb; 469 470 drm_framebuffer_get(&ifbdev->fb->base); 471 472 /* Final pass to check if any active pipes don't have fbs */ 473 for_each_crtc(dev, crtc) { 474 intel_crtc = to_intel_crtc(crtc); 475 476 if (!crtc->state->active) 477 continue; 478 479 WARN(!crtc->primary->state->fb, 480 "re-used BIOS config but lost an fb on crtc %d\n", 481 crtc->base.id); 482 } 483 484 485 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 486 return true; 487 488 out: 489 490 return false; 491 } 492 493 static void intel_fbdev_suspend_worker(struct work_struct *work) 494 { 495 #ifndef __NetBSD__ /* XXX fb suspend */ 496 intel_fbdev_set_suspend(&container_of(work, 497 struct drm_i915_private, 498 fbdev_suspend_work)->drm, 499 FBINFO_STATE_RUNNING, 500 true); 501 #endif 502 } 503 504 int intel_fbdev_init(struct drm_device *dev) 505 { 506 struct drm_i915_private *dev_priv = to_i915(dev); 507 struct intel_fbdev *ifbdev; 508 int ret; 509 510 if (WARN_ON(!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))) 511 return -ENODEV; 512 513 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 514 if (ifbdev == NULL) 515 return -ENOMEM; 516 517 mutex_init(&ifbdev->hpd_lock); 518 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 519 520 if (!intel_fbdev_init_bios(dev, ifbdev)) 521 ifbdev->preferred_bpp = 32; 522 523 ret = drm_fb_helper_init(dev, &ifbdev->helper, 4); 524 if (ret) { 525 kfree(ifbdev); 526 return ret; 527 } 528 529 dev_priv->fbdev = ifbdev; 530 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 531 532 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 533 534 return 0; 535 } 536 537 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 538 { 539 struct intel_fbdev *ifbdev = data; 540 541 /* Due to peculiar init order wrt to hpd handling this is separate. */ 542 if (drm_fb_helper_initial_config(&ifbdev->helper, 543 ifbdev->preferred_bpp)) 544 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 545 } 546 547 void intel_fbdev_initial_config_async(struct drm_device *dev) 548 { 549 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 550 551 if (!ifbdev) 552 return; 553 554 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 555 } 556 557 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 558 { 559 if (!ifbdev->cookie) 560 return; 561 562 /* Only serialises with all preceding async calls, hence +1 */ 563 async_synchronize_cookie(ifbdev->cookie + 1); 564 ifbdev->cookie = 0; 565 } 566 567 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 568 { 569 struct intel_fbdev *ifbdev = dev_priv->fbdev; 570 571 if (!ifbdev) 572 return; 573 574 cancel_work_sync(&dev_priv->fbdev_suspend_work); 575 #ifndef __NetBSD__ /* XXX fb async */ 576 if (!current_is_async()) 577 #endif 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 #ifndef __NetBSD__ /* XXX fb suspend */ 598 static void intel_fbdev_hpd_set_suspend(struct intel_fbdev *ifbdev, int state) 599 { 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_DEBUG_KMS("Handling delayed fbcon HPD event\n"); 610 drm_fb_helper_hotplug_event(&ifbdev->helper); 611 } 612 } 613 #endif /* __NetBSD__ */ 614 615 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 616 { 617 #ifndef __NetBSD__ /* XXX fb suspend */ 618 struct drm_i915_private *dev_priv = to_i915(dev); 619 struct intel_fbdev *ifbdev = dev_priv->fbdev; 620 struct fb_info *info; 621 622 if (!ifbdev || !ifbdev->vma) 623 return; 624 625 info = ifbdev->helper.fbdev; 626 627 if (synchronous) { 628 /* Flush any pending work to turn the console on, and then 629 * wait to turn it off. It must be synchronous as we are 630 * about to suspend or unload the driver. 631 * 632 * Note that from within the work-handler, we cannot flush 633 * ourselves, so only flush outstanding work upon suspend! 634 */ 635 if (state != FBINFO_STATE_RUNNING) 636 flush_work(&dev_priv->fbdev_suspend_work); 637 638 console_lock(); 639 } else { 640 /* 641 * The console lock can be pretty contented on resume due 642 * to all the printk activity. Try to keep it out of the hot 643 * path of resume if possible. 644 */ 645 WARN_ON(state != FBINFO_STATE_RUNNING); 646 if (!console_trylock()) { 647 /* Don't block our own workqueue as this can 648 * be run in parallel with other i915.ko tasks. 649 */ 650 schedule_work(&dev_priv->fbdev_suspend_work); 651 return; 652 } 653 } 654 655 /* On resume from hibernation: If the object is shmemfs backed, it has 656 * been restored from swap. If the object is stolen however, it will be 657 * full of whatever garbage was left in there. 658 */ 659 if (state == FBINFO_STATE_RUNNING && 660 intel_fb_obj(&ifbdev->fb->base)->stolen) 661 memset_io(info->screen_base, 0, info->screen_size); 662 663 drm_fb_helper_set_suspend(&ifbdev->helper, state); 664 console_unlock(); 665 666 intel_fbdev_hpd_set_suspend(ifbdev, state); 667 #endif 668 } 669 670 void intel_fbdev_output_poll_changed(struct drm_device *dev) 671 { 672 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 673 bool send_hpd; 674 675 if (!ifbdev) 676 return; 677 678 intel_fbdev_sync(ifbdev); 679 680 mutex_lock(&ifbdev->hpd_lock); 681 send_hpd = !ifbdev->hpd_suspended; 682 ifbdev->hpd_waiting = true; 683 mutex_unlock(&ifbdev->hpd_lock); 684 685 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 686 drm_fb_helper_hotplug_event(&ifbdev->helper); 687 } 688 689 void intel_fbdev_restore_mode(struct drm_device *dev) 690 { 691 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 692 693 if (!ifbdev) 694 return; 695 696 intel_fbdev_sync(ifbdev); 697 if (!ifbdev->vma) 698 return; 699 700 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 701 intel_fbdev_invalidate(ifbdev); 702 } 703
Indexes created Sat Sep 20 22:09:52 GMT 2025