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_gtt_view view = { 202 .type = I915_GTT_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 mutex_lock(&ifbdev->hpd_lock); 214 ret = ifbdev->hpd_suspended ? -EAGAIN : 0; 215 mutex_unlock(&ifbdev->hpd_lock); 216 if (ret) 217 return ret; 218 219 if (intel_fb && 220 (sizes->fb_width > intel_fb->base.width || 221 sizes->fb_height > intel_fb->base.height)) { 222 drm_dbg_kms(&dev_priv->drm, 223 "BIOS fb too small (%dx%d), we require (%dx%d)," 224 " releasing it\n", 225 intel_fb->base.width, intel_fb->base.height, 226 sizes->fb_width, sizes->fb_height); 227 drm_framebuffer_put(&intel_fb->base); 228 intel_fb = ifbdev->fb = NULL; 229 } 230 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { 231 drm_dbg_kms(&dev_priv->drm, 232 "no BIOS fb, allocating a new one\n"); 233 ret = intelfb_alloc(helper, sizes); 234 if (ret) 235 return ret; 236 intel_fb = ifbdev->fb; 237 } else { 238 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); 239 prealloc = true; 240 sizes->fb_width = intel_fb->base.width; 241 sizes->fb_height = intel_fb->base.height; 242 } 243 244 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 245 246 /* Pin the GGTT vma for our access via info->screen_base. 247 * This also validates that any existing fb inherited from the 248 * BIOS is suitable for own access. 249 */ 250 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, 251 &view, false, &flags); 252 if (IS_ERR(vma)) { 253 ret = PTR_ERR(vma); 254 goto out_unlock; 255 } 256 257 info = drm_fb_helper_alloc_fbi(helper); 258 if (IS_ERR(info)) { 259 drm_err(&dev_priv->drm, "Failed to allocate fb_info\n"); 260 ret = PTR_ERR(info); 261 goto out_unpin; 262 } 263 264 ifbdev->helper.fb = &ifbdev->fb->base; 265 266 info->fbops = &intelfb_ops; 267 268 /* setup aperture base/size for vesafb takeover */ 269 obj = intel_fb_obj(&intel_fb->base); 270 if (i915_gem_object_is_lmem(obj)) { 271 struct intel_memory_region *mem = obj->mm.region; 272 273 info->apertures->ranges[0].base = mem->io_start; 274 info->apertures->ranges[0].size = mem->io_size; 275 276 /* Use fbdev's framebuffer from lmem for discrete */ 277 info->fix.smem_start = 278 (unsigned long)(mem->io_start + 279 i915_gem_object_get_dma_address(obj, 0)); 280 info->fix.smem_len = obj->base.size; 281 } else { 282 info->apertures->ranges[0].base = ggtt->gmadr.start; 283 info->apertures->ranges[0].size = ggtt->mappable_end; 284 285 /* Our framebuffer is the entirety of fbdev's system memory */ 286 info->fix.smem_start = 287 (unsigned long)(ggtt->gmadr.start + vma->node.start); 288 info->fix.smem_len = vma->size; 289 } 290 291 vaddr = i915_vma_pin_iomap(vma); 292 if (IS_ERR(vaddr)) { 293 drm_err(&dev_priv->drm, 294 "Failed to remap framebuffer into virtual memory\n"); 295 ret = PTR_ERR(vaddr); 296 goto out_unpin; 297 } 298 info->screen_base = vaddr; 299 info->screen_size = vma->size; 300 301 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); 302 303 /* If the object is shmemfs backed, it will have given us zeroed pages. 304 * If the object is stolen however, it will be full of whatever 305 * garbage was left in there. 306 */ 307 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc) 308 memset_io(info->screen_base, 0, info->screen_size); 309 310 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 311 312 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", 313 ifbdev->fb->base.width, ifbdev->fb->base.height, 314 i915_ggtt_offset(vma)); 315 ifbdev->vma = vma; 316 ifbdev->vma_flags = flags; 317 318 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 319 vga_switcheroo_client_fb_set(pdev, info); 320 return 0; 321 322 out_unpin: 323 intel_unpin_fb_vma(vma, flags); 324 out_unlock: 325 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 326 return ret; 327 } 328 329 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 330 .fb_probe = intelfb_create, 331 }; 332 333 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 334 { 335 /* We rely on the object-free to release the VMA pinning for 336 * the info->screen_base mmaping. Leaking the VMA is simpler than 337 * trying to rectify all the possible error paths leading here. 338 */ 339 340 drm_fb_helper_fini(&ifbdev->helper); 341 342 if (ifbdev->vma) 343 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); 344 345 if (ifbdev->fb) 346 drm_framebuffer_remove(&ifbdev->fb->base); 347 348 kfree(ifbdev); 349 } 350 351 /* 352 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 353 * The core display code will have read out the current plane configuration, 354 * so we use that to figure out if there's an object for us to use as the 355 * fb, and if so, we re-use it for the fbdev configuration. 356 * 357 * Note we only support a single fb shared across pipes for boot (mostly for 358 * fbcon), so we just find the biggest and use that. 359 */ 360 static bool intel_fbdev_init_bios(struct drm_device *dev, 361 struct intel_fbdev *ifbdev) 362 { 363 struct drm_i915_private *i915 = to_i915(dev); 364 struct intel_framebuffer *fb = NULL; 365 struct intel_crtc *crtc; 366 unsigned int max_size = 0; 367 368 /* Find the largest fb */ 369 for_each_intel_crtc(dev, crtc) { 370 struct intel_crtc_state *crtc_state = 371 to_intel_crtc_state(crtc->base.state); 372 struct intel_plane *plane = 373 to_intel_plane(crtc->base.primary); 374 struct intel_plane_state *plane_state = 375 to_intel_plane_state(plane->base.state); 376 struct drm_i915_gem_object *obj = 377 intel_fb_obj(plane_state->uapi.fb); 378 379 if (!crtc_state->uapi.active) { 380 drm_dbg_kms(&i915->drm, 381 "[CRTC:%d:%s] not active, skipping\n", 382 crtc->base.base.id, crtc->base.name); 383 continue; 384 } 385 386 if (!obj) { 387 drm_dbg_kms(&i915->drm, 388 "[PLANE:%d:%s] no fb, skipping\n", 389 plane->base.base.id, plane->base.name); 390 continue; 391 } 392 393 if (obj->base.size > max_size) { 394 drm_dbg_kms(&i915->drm, 395 "found possible fb from [PLANE:%d:%s]\n", 396 plane->base.base.id, plane->base.name); 397 fb = to_intel_framebuffer(plane_state->uapi.fb); 398 max_size = obj->base.size; 399 } 400 } 401 402 if (!fb) { 403 drm_dbg_kms(&i915->drm, 404 "no active fbs found, not using BIOS config\n"); 405 goto out; 406 } 407 408 /* Now make sure all the pipes will fit into it */ 409 for_each_intel_crtc(dev, crtc) { 410 struct intel_crtc_state *crtc_state = 411 to_intel_crtc_state(crtc->base.state); 412 struct intel_plane *plane = 413 to_intel_plane(crtc->base.primary); 414 unsigned int cur_size; 415 416 if (!crtc_state->uapi.active) { 417 drm_dbg_kms(&i915->drm, 418 "[CRTC:%d:%s] not active, skipping\n", 419 crtc->base.base.id, crtc->base.name); 420 continue; 421 } 422 423 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 424 plane->base.base.id, plane->base.name); 425 426 /* 427 * See if the plane fb we found above will fit on this 428 * pipe. Note we need to use the selected fb's pitch and bpp 429 * rather than the current pipe's, since they differ. 430 */ 431 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 432 cur_size = cur_size * fb->base.format->cpp[0]; 433 if (fb->base.pitches[0] < cur_size) { 434 drm_dbg_kms(&i915->drm, 435 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 436 plane->base.base.id, plane->base.name, 437 cur_size, fb->base.pitches[0]); 438 fb = NULL; 439 break; 440 } 441 442 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 443 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 444 cur_size *= fb->base.pitches[0]; 445 drm_dbg_kms(&i915->drm, 446 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 447 crtc->base.base.id, crtc->base.name, 448 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 449 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 450 fb->base.format->cpp[0] * 8, 451 cur_size); 452 453 if (cur_size > max_size) { 454 drm_dbg_kms(&i915->drm, 455 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 456 plane->base.base.id, plane->base.name, 457 cur_size, max_size); 458 fb = NULL; 459 break; 460 } 461 462 drm_dbg_kms(&i915->drm, 463 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 464 plane->base.base.id, plane->base.name, 465 max_size, cur_size); 466 } 467 468 if (!fb) { 469 drm_dbg_kms(&i915->drm, 470 "BIOS fb not suitable for all pipes, not using\n"); 471 goto out; 472 } 473 474 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 475 ifbdev->fb = fb; 476 477 drm_framebuffer_get(&ifbdev->fb->base); 478 479 /* Final pass to check if any active pipes don't have fbs */ 480 for_each_intel_crtc(dev, crtc) { 481 struct intel_crtc_state *crtc_state = 482 to_intel_crtc_state(crtc->base.state); 483 struct intel_plane *plane = 484 to_intel_plane(crtc->base.primary); 485 struct intel_plane_state *plane_state = 486 to_intel_plane_state(plane->base.state); 487 488 if (!crtc_state->uapi.active) 489 continue; 490 491 drm_WARN(dev, !plane_state->uapi.fb, 492 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 493 plane->base.base.id, plane->base.name); 494 } 495 496 497 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 498 return true; 499 500 out: 501 502 return false; 503 } 504 505 static void intel_fbdev_suspend_worker(struct work_struct *work) 506 { 507 intel_fbdev_set_suspend(&container_of(work, 508 struct drm_i915_private, 509 display.fbdev.suspend_work)->drm, 510 FBINFO_STATE_RUNNING, 511 true); 512 } 513 514 int intel_fbdev_init(struct drm_device *dev) 515 { 516 struct drm_i915_private *dev_priv = to_i915(dev); 517 struct intel_fbdev *ifbdev; 518 int ret; 519 520 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 521 return -ENODEV; 522 523 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 524 if (ifbdev == NULL) 525 return -ENOMEM; 526 527 mutex_init(&ifbdev->hpd_lock); 528 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 529 530 if (!intel_fbdev_init_bios(dev, ifbdev)) 531 ifbdev->preferred_bpp = 32; 532 533 ret = drm_fb_helper_init(dev, &ifbdev->helper); 534 if (ret) { 535 kfree(ifbdev); 536 return ret; 537 } 538 539 dev_priv->display.fbdev.fbdev = ifbdev; 540 INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); 541 542 return 0; 543 } 544 545 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 546 { 547 struct intel_fbdev *ifbdev = data; 548 549 /* Due to peculiar init order wrt to hpd handling this is separate. */ 550 if (drm_fb_helper_initial_config(&ifbdev->helper, 551 ifbdev->preferred_bpp)) 552 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 553 } 554 555 void intel_fbdev_initial_config_async(struct drm_device *dev) 556 { 557 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 558 559 if (!ifbdev) 560 return; 561 562 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 563 } 564 565 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 566 { 567 if (!ifbdev->cookie) 568 return; 569 570 /* Only serialises with all preceding async calls, hence +1 */ 571 async_synchronize_cookie(ifbdev->cookie + 1); 572 ifbdev->cookie = 0; 573 } 574 575 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 576 { 577 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 578 579 if (!ifbdev) 580 return; 581 582 intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); 583 584 if (!current_is_async()) 585 intel_fbdev_sync(ifbdev); 586 587 drm_fb_helper_unregister_fbi(&ifbdev->helper); 588 } 589 590 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 591 { 592 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); 593 594 if (!ifbdev) 595 return; 596 597 intel_fbdev_destroy(ifbdev); 598 } 599 600 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 601 * processing, fbdev will perform a full connector reprobe if a hotplug event 602 * was received while HPD was suspended. 603 */ 604 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 605 { 606 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; 607 bool send_hpd = false; 608 609 mutex_lock(&ifbdev->hpd_lock); 610 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 611 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 612 ifbdev->hpd_waiting = false; 613 mutex_unlock(&ifbdev->hpd_lock); 614 615 if (send_hpd) { 616 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 617 drm_fb_helper_hotplug_event(&ifbdev->helper); 618 } 619 } 620 621 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 622 { 623 struct drm_i915_private *dev_priv = to_i915(dev); 624 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 625 struct fb_info *info; 626 627 if (!ifbdev || !ifbdev->vma) 628 goto set_suspend; 629 630 info = ifbdev->helper.fbdev; 631 632 if (synchronous) { 633 /* Flush any pending work to turn the console on, and then 634 * wait to turn it off. It must be synchronous as we are 635 * about to suspend or unload the driver. 636 * 637 * Note that from within the work-handler, we cannot flush 638 * ourselves, so only flush outstanding work upon suspend! 639 */ 640 if (state != FBINFO_STATE_RUNNING) 641 flush_work(&dev_priv->display.fbdev.suspend_work); 642 643 console_lock(); 644 } else { 645 /* 646 * The console lock can be pretty contented on resume due 647 * to all the printk activity. Try to keep it out of the hot 648 * path of resume if possible. 649 */ 650 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 651 if (!console_trylock()) { 652 /* Don't block our own workqueue as this can 653 * be run in parallel with other i915.ko tasks. 654 */ 655 schedule_work(&dev_priv->display.fbdev.suspend_work); 656 return; 657 } 658 } 659 660 /* On resume from hibernation: If the object is shmemfs backed, it has 661 * been restored from swap. If the object is stolen however, it will be 662 * full of whatever garbage was left in there. 663 */ 664 if (state == FBINFO_STATE_RUNNING && 665 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 666 memset_io(info->screen_base, 0, info->screen_size); 667 668 drm_fb_helper_set_suspend(&ifbdev->helper, state); 669 console_unlock(); 670 671 set_suspend: 672 intel_fbdev_hpd_set_suspend(dev_priv, state); 673 } 674 675 void intel_fbdev_output_poll_changed(struct drm_device *dev) 676 { 677 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 678 bool send_hpd; 679 680 if (!ifbdev) 681 return; 682 683 intel_fbdev_sync(ifbdev); 684 685 mutex_lock(&ifbdev->hpd_lock); 686 send_hpd = !ifbdev->hpd_suspended; 687 ifbdev->hpd_waiting = true; 688 mutex_unlock(&ifbdev->hpd_lock); 689 690 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 691 drm_fb_helper_hotplug_event(&ifbdev->helper); 692 } 693 694 void intel_fbdev_restore_mode(struct drm_device *dev) 695 { 696 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 697 698 if (!ifbdev) 699 return; 700 701 intel_fbdev_sync(ifbdev); 702 if (!ifbdev->vma) 703 return; 704 705 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 706 intel_fbdev_invalidate(ifbdev); 707 } 708 709 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) 710 { 711 if (!fbdev || !fbdev->helper.fb) 712 return NULL; 713 714 return to_intel_framebuffer(fbdev->helper.fb); 715 } 716