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_read = drm_fb_helper_cfb_read, 128 .fb_write = drm_fb_helper_cfb_write, 129 .fb_fillrect = drm_fb_helper_cfb_fillrect, 130 .fb_copyarea = drm_fb_helper_cfb_copyarea, 131 .fb_imageblit = drm_fb_helper_cfb_imageblit, 132 .fb_pan_display = intel_fbdev_pan_display, 133 .fb_blank = intel_fbdev_blank, 134 }; 135 136 static int intelfb_alloc(struct drm_fb_helper *helper, 137 struct drm_fb_helper_surface_size *sizes) 138 { 139 struct intel_fbdev *ifbdev = 140 container_of(helper, struct intel_fbdev, helper); 141 struct drm_framebuffer *fb; 142 struct drm_device *dev = helper->dev; 143 struct drm_i915_private *dev_priv = to_i915(dev); 144 struct drm_mode_fb_cmd2 mode_cmd = {}; 145 struct drm_i915_gem_object *obj; 146 int size; 147 148 /* we don't do packed 24bpp */ 149 if (sizes->surface_bpp == 24) 150 sizes->surface_bpp = 32; 151 152 mode_cmd.width = sizes->surface_width; 153 mode_cmd.height = sizes->surface_height; 154 155 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 156 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 157 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 158 sizes->surface_depth); 159 160 size = mode_cmd.pitches[0] * mode_cmd.height; 161 size = PAGE_ALIGN(size); 162 163 obj = ERR_PTR(-ENODEV); 164 if (HAS_LMEM(dev_priv)) { 165 obj = i915_gem_object_create_lmem(dev_priv, size, 166 I915_BO_ALLOC_CONTIGUOUS); 167 } else { 168 /* 169 * If the FB is too big, just don't use it since fbdev is not very 170 * important and we should probably use that space with FBC or other 171 * features. 172 */ 173 if (size * 2 < dev_priv->dsm.usable_size) 174 obj = i915_gem_object_create_stolen(dev_priv, size); 175 if (IS_ERR(obj)) 176 obj = i915_gem_object_create_shmem(dev_priv, size); 177 } 178 179 if (IS_ERR(obj)) { 180 drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj); 181 return PTR_ERR(obj); 182 } 183 184 fb = intel_framebuffer_create(obj, &mode_cmd); 185 i915_gem_object_put(obj); 186 if (IS_ERR(fb)) 187 return PTR_ERR(fb); 188 189 ifbdev->fb = to_intel_framebuffer(fb); 190 return 0; 191 } 192 193 static int intelfb_create(struct drm_fb_helper *helper, 194 struct drm_fb_helper_surface_size *sizes) 195 { 196 struct intel_fbdev *ifbdev = 197 container_of(helper, struct intel_fbdev, helper); 198 struct intel_framebuffer *intel_fb = ifbdev->fb; 199 struct drm_device *dev = helper->dev; 200 struct drm_i915_private *dev_priv = to_i915(dev); 201 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 202 struct i915_ggtt *ggtt = to_gt(dev_priv)->ggtt; 203 const struct i915_gtt_view view = { 204 .type = I915_GTT_VIEW_NORMAL, 205 }; 206 intel_wakeref_t wakeref; 207 struct fb_info *info; 208 struct i915_vma *vma; 209 unsigned long flags = 0; 210 bool prealloc = false; 211 void __iomem *vaddr; 212 struct drm_i915_gem_object *obj; 213 int ret; 214 215 mutex_lock(&ifbdev->hpd_lock); 216 ret = ifbdev->hpd_suspended ? -EAGAIN : 0; 217 mutex_unlock(&ifbdev->hpd_lock); 218 if (ret) 219 return ret; 220 221 if (intel_fb && 222 (sizes->fb_width > intel_fb->base.width || 223 sizes->fb_height > intel_fb->base.height)) { 224 drm_dbg_kms(&dev_priv->drm, 225 "BIOS fb too small (%dx%d), we require (%dx%d)," 226 " releasing it\n", 227 intel_fb->base.width, intel_fb->base.height, 228 sizes->fb_width, sizes->fb_height); 229 drm_framebuffer_put(&intel_fb->base); 230 intel_fb = ifbdev->fb = NULL; 231 } 232 if (!intel_fb || drm_WARN_ON(dev, !intel_fb_obj(&intel_fb->base))) { 233 drm_dbg_kms(&dev_priv->drm, 234 "no BIOS fb, allocating a new one\n"); 235 ret = intelfb_alloc(helper, sizes); 236 if (ret) 237 return ret; 238 intel_fb = ifbdev->fb; 239 } else { 240 drm_dbg_kms(&dev_priv->drm, "re-using BIOS fb\n"); 241 prealloc = true; 242 sizes->fb_width = intel_fb->base.width; 243 sizes->fb_height = intel_fb->base.height; 244 } 245 246 wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm); 247 248 /* Pin the GGTT vma for our access via info->screen_base. 249 * This also validates that any existing fb inherited from the 250 * BIOS is suitable for own access. 251 */ 252 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, false, 253 &view, false, &flags); 254 if (IS_ERR(vma)) { 255 ret = PTR_ERR(vma); 256 goto out_unlock; 257 } 258 259 info = drm_fb_helper_alloc_info(helper); 260 if (IS_ERR(info)) { 261 drm_err(&dev_priv->drm, "Failed to allocate fb_info (%pe)\n", info); 262 ret = PTR_ERR(info); 263 goto out_unpin; 264 } 265 266 ifbdev->helper.fb = &ifbdev->fb->base; 267 268 info->fbops = &intelfb_ops; 269 270 obj = intel_fb_obj(&intel_fb->base); 271 if (i915_gem_object_is_lmem(obj)) { 272 struct intel_memory_region *mem = obj->mm.region; 273 274 /* Use fbdev's framebuffer from lmem for discrete */ 275 info->fix.smem_start = 276 (unsigned long)(mem->io_start + 277 i915_gem_object_get_dma_address(obj, 0)); 278 info->fix.smem_len = obj->base.size; 279 } else { 280 /* Our framebuffer is the entirety of fbdev's system memory */ 281 info->fix.smem_start = 282 (unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma)); 283 info->fix.smem_len = vma->size; 284 } 285 286 vaddr = i915_vma_pin_iomap(vma); 287 if (IS_ERR(vaddr)) { 288 drm_err(&dev_priv->drm, 289 "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); 290 ret = PTR_ERR(vaddr); 291 goto out_unpin; 292 } 293 info->screen_base = vaddr; 294 info->screen_size = vma->size; 295 296 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); 297 298 /* If the object is shmemfs backed, it will have given us zeroed pages. 299 * If the object is stolen however, it will be full of whatever 300 * garbage was left in there. 301 */ 302 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc) 303 memset_io(info->screen_base, 0, info->screen_size); 304 305 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 306 307 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", 308 ifbdev->fb->base.width, ifbdev->fb->base.height, 309 i915_ggtt_offset(vma)); 310 ifbdev->vma = vma; 311 ifbdev->vma_flags = flags; 312 313 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 314 vga_switcheroo_client_fb_set(pdev, info); 315 return 0; 316 317 out_unpin: 318 intel_unpin_fb_vma(vma, flags); 319 out_unlock: 320 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 321 return ret; 322 } 323 324 static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip) 325 { 326 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) 327 return 0; 328 329 if (helper->fb->funcs->dirty) 330 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); 331 332 return 0; 333 } 334 335 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 336 .fb_probe = intelfb_create, 337 .fb_dirty = intelfb_dirty, 338 }; 339 340 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 341 { 342 /* We rely on the object-free to release the VMA pinning for 343 * the info->screen_base mmaping. Leaking the VMA is simpler than 344 * trying to rectify all the possible error paths leading here. 345 */ 346 347 drm_fb_helper_fini(&ifbdev->helper); 348 349 if (ifbdev->vma) 350 intel_unpin_fb_vma(ifbdev->vma, ifbdev->vma_flags); 351 352 if (ifbdev->fb) 353 drm_framebuffer_remove(&ifbdev->fb->base); 354 355 drm_fb_helper_unprepare(&ifbdev->helper); 356 kfree(ifbdev); 357 } 358 359 /* 360 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 361 * The core display code will have read out the current plane configuration, 362 * so we use that to figure out if there's an object for us to use as the 363 * fb, and if so, we re-use it for the fbdev configuration. 364 * 365 * Note we only support a single fb shared across pipes for boot (mostly for 366 * fbcon), so we just find the biggest and use that. 367 */ 368 static bool intel_fbdev_init_bios(struct drm_device *dev, 369 struct intel_fbdev *ifbdev) 370 { 371 struct drm_i915_private *i915 = to_i915(dev); 372 struct intel_framebuffer *fb = NULL; 373 struct intel_crtc *crtc; 374 unsigned int max_size = 0; 375 376 /* Find the largest fb */ 377 for_each_intel_crtc(dev, crtc) { 378 struct intel_crtc_state *crtc_state = 379 to_intel_crtc_state(crtc->base.state); 380 struct intel_plane *plane = 381 to_intel_plane(crtc->base.primary); 382 struct intel_plane_state *plane_state = 383 to_intel_plane_state(plane->base.state); 384 struct drm_i915_gem_object *obj = 385 intel_fb_obj(plane_state->uapi.fb); 386 387 if (!crtc_state->uapi.active) { 388 drm_dbg_kms(&i915->drm, 389 "[CRTC:%d:%s] not active, skipping\n", 390 crtc->base.base.id, crtc->base.name); 391 continue; 392 } 393 394 if (!obj) { 395 drm_dbg_kms(&i915->drm, 396 "[PLANE:%d:%s] no fb, skipping\n", 397 plane->base.base.id, plane->base.name); 398 continue; 399 } 400 401 if (obj->base.size > max_size) { 402 drm_dbg_kms(&i915->drm, 403 "found possible fb from [PLANE:%d:%s]\n", 404 plane->base.base.id, plane->base.name); 405 fb = to_intel_framebuffer(plane_state->uapi.fb); 406 max_size = obj->base.size; 407 } 408 } 409 410 if (!fb) { 411 drm_dbg_kms(&i915->drm, 412 "no active fbs found, not using BIOS config\n"); 413 goto out; 414 } 415 416 /* Now make sure all the pipes will fit into it */ 417 for_each_intel_crtc(dev, crtc) { 418 struct intel_crtc_state *crtc_state = 419 to_intel_crtc_state(crtc->base.state); 420 struct intel_plane *plane = 421 to_intel_plane(crtc->base.primary); 422 unsigned int cur_size; 423 424 if (!crtc_state->uapi.active) { 425 drm_dbg_kms(&i915->drm, 426 "[CRTC:%d:%s] not active, skipping\n", 427 crtc->base.base.id, crtc->base.name); 428 continue; 429 } 430 431 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 432 plane->base.base.id, plane->base.name); 433 434 /* 435 * See if the plane fb we found above will fit on this 436 * pipe. Note we need to use the selected fb's pitch and bpp 437 * rather than the current pipe's, since they differ. 438 */ 439 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 440 cur_size = cur_size * fb->base.format->cpp[0]; 441 if (fb->base.pitches[0] < cur_size) { 442 drm_dbg_kms(&i915->drm, 443 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 444 plane->base.base.id, plane->base.name, 445 cur_size, fb->base.pitches[0]); 446 fb = NULL; 447 break; 448 } 449 450 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 451 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 452 cur_size *= fb->base.pitches[0]; 453 drm_dbg_kms(&i915->drm, 454 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 455 crtc->base.base.id, crtc->base.name, 456 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 457 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 458 fb->base.format->cpp[0] * 8, 459 cur_size); 460 461 if (cur_size > max_size) { 462 drm_dbg_kms(&i915->drm, 463 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 464 plane->base.base.id, plane->base.name, 465 cur_size, max_size); 466 fb = NULL; 467 break; 468 } 469 470 drm_dbg_kms(&i915->drm, 471 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 472 plane->base.base.id, plane->base.name, 473 max_size, cur_size); 474 } 475 476 if (!fb) { 477 drm_dbg_kms(&i915->drm, 478 "BIOS fb not suitable for all pipes, not using\n"); 479 goto out; 480 } 481 482 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 483 ifbdev->fb = fb; 484 485 drm_framebuffer_get(&ifbdev->fb->base); 486 487 /* Final pass to check if any active pipes don't have fbs */ 488 for_each_intel_crtc(dev, crtc) { 489 struct intel_crtc_state *crtc_state = 490 to_intel_crtc_state(crtc->base.state); 491 struct intel_plane *plane = 492 to_intel_plane(crtc->base.primary); 493 struct intel_plane_state *plane_state = 494 to_intel_plane_state(plane->base.state); 495 496 if (!crtc_state->uapi.active) 497 continue; 498 499 drm_WARN(dev, !plane_state->uapi.fb, 500 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 501 plane->base.base.id, plane->base.name); 502 } 503 504 505 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 506 return true; 507 508 out: 509 510 return false; 511 } 512 513 static void intel_fbdev_suspend_worker(struct work_struct *work) 514 { 515 intel_fbdev_set_suspend(&container_of(work, 516 struct drm_i915_private, 517 display.fbdev.suspend_work)->drm, 518 FBINFO_STATE_RUNNING, 519 true); 520 } 521 522 int intel_fbdev_init(struct drm_device *dev) 523 { 524 struct drm_i915_private *dev_priv = to_i915(dev); 525 struct intel_fbdev *ifbdev; 526 int ret; 527 528 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 529 return -ENODEV; 530 531 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 532 if (ifbdev == NULL) 533 return -ENOMEM; 534 535 mutex_init(&ifbdev->hpd_lock); 536 drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs); 537 538 if (intel_fbdev_init_bios(dev, ifbdev)) 539 ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp; 540 else 541 ifbdev->preferred_bpp = ifbdev->helper.preferred_bpp; 542 543 ret = drm_fb_helper_init(dev, &ifbdev->helper); 544 if (ret) { 545 kfree(ifbdev); 546 return ret; 547 } 548 549 dev_priv->display.fbdev.fbdev = ifbdev; 550 INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); 551 552 return 0; 553 } 554 555 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 556 { 557 struct intel_fbdev *ifbdev = data; 558 559 /* Due to peculiar init order wrt to hpd handling this is separate. */ 560 if (drm_fb_helper_initial_config(&ifbdev->helper)) 561 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 562 } 563 564 void intel_fbdev_initial_config_async(struct drm_device *dev) 565 { 566 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 567 568 if (!ifbdev) 569 return; 570 571 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 572 } 573 574 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 575 { 576 if (!ifbdev->cookie) 577 return; 578 579 /* Only serialises with all preceding async calls, hence +1 */ 580 async_synchronize_cookie(ifbdev->cookie + 1); 581 ifbdev->cookie = 0; 582 } 583 584 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 585 { 586 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 587 588 if (!ifbdev) 589 return; 590 591 intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); 592 593 if (!current_is_async()) 594 intel_fbdev_sync(ifbdev); 595 596 drm_fb_helper_unregister_info(&ifbdev->helper); 597 } 598 599 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 600 { 601 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); 602 603 if (!ifbdev) 604 return; 605 606 intel_fbdev_destroy(ifbdev); 607 } 608 609 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 610 * processing, fbdev will perform a full connector reprobe if a hotplug event 611 * was received while HPD was suspended. 612 */ 613 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 614 { 615 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; 616 bool send_hpd = false; 617 618 mutex_lock(&ifbdev->hpd_lock); 619 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 620 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 621 ifbdev->hpd_waiting = false; 622 mutex_unlock(&ifbdev->hpd_lock); 623 624 if (send_hpd) { 625 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 626 drm_fb_helper_hotplug_event(&ifbdev->helper); 627 } 628 } 629 630 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 631 { 632 struct drm_i915_private *dev_priv = to_i915(dev); 633 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 634 struct fb_info *info; 635 636 if (!ifbdev) 637 return; 638 639 if (drm_WARN_ON(&dev_priv->drm, !HAS_DISPLAY(dev_priv))) 640 return; 641 642 if (!ifbdev->vma) 643 goto set_suspend; 644 645 info = ifbdev->helper.info; 646 647 if (synchronous) { 648 /* Flush any pending work to turn the console on, and then 649 * wait to turn it off. It must be synchronous as we are 650 * about to suspend or unload the driver. 651 * 652 * Note that from within the work-handler, we cannot flush 653 * ourselves, so only flush outstanding work upon suspend! 654 */ 655 if (state != FBINFO_STATE_RUNNING) 656 flush_work(&dev_priv->display.fbdev.suspend_work); 657 658 console_lock(); 659 } else { 660 /* 661 * The console lock can be pretty contented on resume due 662 * to all the printk activity. Try to keep it out of the hot 663 * path of resume if possible. 664 */ 665 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 666 if (!console_trylock()) { 667 /* Don't block our own workqueue as this can 668 * be run in parallel with other i915.ko tasks. 669 */ 670 schedule_work(&dev_priv->display.fbdev.suspend_work); 671 return; 672 } 673 } 674 675 /* On resume from hibernation: If the object is shmemfs backed, it has 676 * been restored from swap. If the object is stolen however, it will be 677 * full of whatever garbage was left in there. 678 */ 679 if (state == FBINFO_STATE_RUNNING && 680 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 681 memset_io(info->screen_base, 0, info->screen_size); 682 683 drm_fb_helper_set_suspend(&ifbdev->helper, state); 684 console_unlock(); 685 686 set_suspend: 687 intel_fbdev_hpd_set_suspend(dev_priv, state); 688 } 689 690 void intel_fbdev_output_poll_changed(struct drm_device *dev) 691 { 692 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 693 bool send_hpd; 694 695 if (!ifbdev) 696 return; 697 698 intel_fbdev_sync(ifbdev); 699 700 mutex_lock(&ifbdev->hpd_lock); 701 send_hpd = !ifbdev->hpd_suspended; 702 ifbdev->hpd_waiting = true; 703 mutex_unlock(&ifbdev->hpd_lock); 704 705 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 706 drm_fb_helper_hotplug_event(&ifbdev->helper); 707 } 708 709 void intel_fbdev_restore_mode(struct drm_device *dev) 710 { 711 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 712 713 if (!ifbdev) 714 return; 715 716 intel_fbdev_sync(ifbdev); 717 if (!ifbdev->vma) 718 return; 719 720 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 721 intel_fbdev_invalidate(ifbdev); 722 } 723 724 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) 725 { 726 if (!fbdev || !fbdev->helper.fb) 727 return NULL; 728 729 return to_intel_framebuffer(fbdev->helper.fb); 730 } 731