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->stolen_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 /* setup aperture base/size for vesafb takeover */ 271 obj = intel_fb_obj(&intel_fb->base); 272 if (i915_gem_object_is_lmem(obj)) { 273 struct intel_memory_region *mem = obj->mm.region; 274 275 info->apertures->ranges[0].base = mem->io_start; 276 info->apertures->ranges[0].size = mem->io_size; 277 278 /* Use fbdev's framebuffer from lmem for discrete */ 279 info->fix.smem_start = 280 (unsigned long)(mem->io_start + 281 i915_gem_object_get_dma_address(obj, 0)); 282 info->fix.smem_len = obj->base.size; 283 } else { 284 info->apertures->ranges[0].base = ggtt->gmadr.start; 285 info->apertures->ranges[0].size = ggtt->mappable_end; 286 287 /* Our framebuffer is the entirety of fbdev's system memory */ 288 info->fix.smem_start = 289 (unsigned long)(ggtt->gmadr.start + vma->node.start); 290 info->fix.smem_len = vma->size; 291 } 292 293 vaddr = i915_vma_pin_iomap(vma); 294 if (IS_ERR(vaddr)) { 295 drm_err(&dev_priv->drm, 296 "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); 297 ret = PTR_ERR(vaddr); 298 goto out_unpin; 299 } 300 info->screen_base = vaddr; 301 info->screen_size = vma->size; 302 303 drm_fb_helper_fill_info(info, &ifbdev->helper, sizes); 304 305 /* If the object is shmemfs backed, it will have given us zeroed pages. 306 * If the object is stolen however, it will be full of whatever 307 * garbage was left in there. 308 */ 309 if (!i915_gem_object_is_shmem(vma->obj) && !prealloc) 310 memset_io(info->screen_base, 0, info->screen_size); 311 312 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 313 314 drm_dbg_kms(&dev_priv->drm, "allocated %dx%d fb: 0x%08x\n", 315 ifbdev->fb->base.width, ifbdev->fb->base.height, 316 i915_ggtt_offset(vma)); 317 ifbdev->vma = vma; 318 ifbdev->vma_flags = flags; 319 320 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 321 vga_switcheroo_client_fb_set(pdev, info); 322 return 0; 323 324 out_unpin: 325 intel_unpin_fb_vma(vma, flags); 326 out_unlock: 327 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref); 328 return ret; 329 } 330 331 static int intelfb_dirty(struct drm_fb_helper *helper, struct drm_clip_rect *clip) 332 { 333 if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2)) 334 return 0; 335 336 if (helper->fb->funcs->dirty) 337 return helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1); 338 339 return 0; 340 } 341 342 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 343 .fb_probe = intelfb_create, 344 .fb_dirty = intelfb_dirty, 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 kfree(ifbdev); 363 } 364 365 /* 366 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 367 * The core display code will have read out the current plane configuration, 368 * so we use that to figure out if there's an object for us to use as the 369 * fb, and if so, we re-use it for the fbdev configuration. 370 * 371 * Note we only support a single fb shared across pipes for boot (mostly for 372 * fbcon), so we just find the biggest and use that. 373 */ 374 static bool intel_fbdev_init_bios(struct drm_device *dev, 375 struct intel_fbdev *ifbdev) 376 { 377 struct drm_i915_private *i915 = to_i915(dev); 378 struct intel_framebuffer *fb = NULL; 379 struct intel_crtc *crtc; 380 unsigned int max_size = 0; 381 382 /* Find the largest fb */ 383 for_each_intel_crtc(dev, crtc) { 384 struct intel_crtc_state *crtc_state = 385 to_intel_crtc_state(crtc->base.state); 386 struct intel_plane *plane = 387 to_intel_plane(crtc->base.primary); 388 struct intel_plane_state *plane_state = 389 to_intel_plane_state(plane->base.state); 390 struct drm_i915_gem_object *obj = 391 intel_fb_obj(plane_state->uapi.fb); 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 if (!obj) { 401 drm_dbg_kms(&i915->drm, 402 "[PLANE:%d:%s] no fb, skipping\n", 403 plane->base.base.id, plane->base.name); 404 continue; 405 } 406 407 if (obj->base.size > max_size) { 408 drm_dbg_kms(&i915->drm, 409 "found possible fb from [PLANE:%d:%s]\n", 410 plane->base.base.id, plane->base.name); 411 fb = to_intel_framebuffer(plane_state->uapi.fb); 412 max_size = obj->base.size; 413 } 414 } 415 416 if (!fb) { 417 drm_dbg_kms(&i915->drm, 418 "no active fbs found, not using BIOS config\n"); 419 goto out; 420 } 421 422 /* Now make sure all the pipes will fit into it */ 423 for_each_intel_crtc(dev, crtc) { 424 struct intel_crtc_state *crtc_state = 425 to_intel_crtc_state(crtc->base.state); 426 struct intel_plane *plane = 427 to_intel_plane(crtc->base.primary); 428 unsigned int cur_size; 429 430 if (!crtc_state->uapi.active) { 431 drm_dbg_kms(&i915->drm, 432 "[CRTC:%d:%s] not active, skipping\n", 433 crtc->base.base.id, crtc->base.name); 434 continue; 435 } 436 437 drm_dbg_kms(&i915->drm, "checking [PLANE:%d:%s] for BIOS fb\n", 438 plane->base.base.id, plane->base.name); 439 440 /* 441 * See if the plane fb we found above will fit on this 442 * pipe. Note we need to use the selected fb's pitch and bpp 443 * rather than the current pipe's, since they differ. 444 */ 445 cur_size = crtc_state->uapi.adjusted_mode.crtc_hdisplay; 446 cur_size = cur_size * fb->base.format->cpp[0]; 447 if (fb->base.pitches[0] < cur_size) { 448 drm_dbg_kms(&i915->drm, 449 "fb not wide enough for [PLANE:%d:%s] (%d vs %d)\n", 450 plane->base.base.id, plane->base.name, 451 cur_size, fb->base.pitches[0]); 452 fb = NULL; 453 break; 454 } 455 456 cur_size = crtc_state->uapi.adjusted_mode.crtc_vdisplay; 457 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 458 cur_size *= fb->base.pitches[0]; 459 drm_dbg_kms(&i915->drm, 460 "[CRTC:%d:%s] area: %dx%d, bpp: %d, size: %d\n", 461 crtc->base.base.id, crtc->base.name, 462 crtc_state->uapi.adjusted_mode.crtc_hdisplay, 463 crtc_state->uapi.adjusted_mode.crtc_vdisplay, 464 fb->base.format->cpp[0] * 8, 465 cur_size); 466 467 if (cur_size > max_size) { 468 drm_dbg_kms(&i915->drm, 469 "fb not big enough for [PLANE:%d:%s] (%d vs %d)\n", 470 plane->base.base.id, plane->base.name, 471 cur_size, max_size); 472 fb = NULL; 473 break; 474 } 475 476 drm_dbg_kms(&i915->drm, 477 "fb big enough [PLANE:%d:%s] (%d >= %d)\n", 478 plane->base.base.id, plane->base.name, 479 max_size, cur_size); 480 } 481 482 if (!fb) { 483 drm_dbg_kms(&i915->drm, 484 "BIOS fb not suitable for all pipes, not using\n"); 485 goto out; 486 } 487 488 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 489 ifbdev->fb = fb; 490 491 drm_framebuffer_get(&ifbdev->fb->base); 492 493 /* Final pass to check if any active pipes don't have fbs */ 494 for_each_intel_crtc(dev, crtc) { 495 struct intel_crtc_state *crtc_state = 496 to_intel_crtc_state(crtc->base.state); 497 struct intel_plane *plane = 498 to_intel_plane(crtc->base.primary); 499 struct intel_plane_state *plane_state = 500 to_intel_plane_state(plane->base.state); 501 502 if (!crtc_state->uapi.active) 503 continue; 504 505 drm_WARN(dev, !plane_state->uapi.fb, 506 "re-used BIOS config but lost an fb on [PLANE:%d:%s]\n", 507 plane->base.base.id, plane->base.name); 508 } 509 510 511 drm_dbg_kms(&i915->drm, "using BIOS fb for initial console\n"); 512 return true; 513 514 out: 515 516 return false; 517 } 518 519 static void intel_fbdev_suspend_worker(struct work_struct *work) 520 { 521 intel_fbdev_set_suspend(&container_of(work, 522 struct drm_i915_private, 523 display.fbdev.suspend_work)->drm, 524 FBINFO_STATE_RUNNING, 525 true); 526 } 527 528 int intel_fbdev_init(struct drm_device *dev) 529 { 530 struct drm_i915_private *dev_priv = to_i915(dev); 531 struct intel_fbdev *ifbdev; 532 int ret; 533 534 if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv))) 535 return -ENODEV; 536 537 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 538 if (ifbdev == NULL) 539 return -ENOMEM; 540 541 mutex_init(&ifbdev->hpd_lock); 542 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 543 544 if (!intel_fbdev_init_bios(dev, ifbdev)) 545 ifbdev->preferred_bpp = 32; 546 547 ret = drm_fb_helper_init(dev, &ifbdev->helper); 548 if (ret) { 549 kfree(ifbdev); 550 return ret; 551 } 552 553 dev_priv->display.fbdev.fbdev = ifbdev; 554 INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); 555 556 return 0; 557 } 558 559 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 560 { 561 struct intel_fbdev *ifbdev = data; 562 563 /* Due to peculiar init order wrt to hpd handling this is separate. */ 564 if (drm_fb_helper_initial_config(&ifbdev->helper, 565 ifbdev->preferred_bpp)) 566 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 567 } 568 569 void intel_fbdev_initial_config_async(struct drm_device *dev) 570 { 571 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 572 573 if (!ifbdev) 574 return; 575 576 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 577 } 578 579 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 580 { 581 if (!ifbdev->cookie) 582 return; 583 584 /* Only serialises with all preceding async calls, hence +1 */ 585 async_synchronize_cookie(ifbdev->cookie + 1); 586 ifbdev->cookie = 0; 587 } 588 589 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 590 { 591 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 592 593 if (!ifbdev) 594 return; 595 596 intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); 597 598 if (!current_is_async()) 599 intel_fbdev_sync(ifbdev); 600 601 drm_fb_helper_unregister_info(&ifbdev->helper); 602 } 603 604 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 605 { 606 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->display.fbdev.fbdev); 607 608 if (!ifbdev) 609 return; 610 611 intel_fbdev_destroy(ifbdev); 612 } 613 614 /* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD 615 * processing, fbdev will perform a full connector reprobe if a hotplug event 616 * was received while HPD was suspended. 617 */ 618 static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state) 619 { 620 struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev; 621 bool send_hpd = false; 622 623 mutex_lock(&ifbdev->hpd_lock); 624 ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED; 625 send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting; 626 ifbdev->hpd_waiting = false; 627 mutex_unlock(&ifbdev->hpd_lock); 628 629 if (send_hpd) { 630 drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n"); 631 drm_fb_helper_hotplug_event(&ifbdev->helper); 632 } 633 } 634 635 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 636 { 637 struct drm_i915_private *dev_priv = to_i915(dev); 638 struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; 639 struct fb_info *info; 640 641 if (!ifbdev || !ifbdev->vma) 642 goto set_suspend; 643 644 info = ifbdev->helper.info; 645 646 if (synchronous) { 647 /* Flush any pending work to turn the console on, and then 648 * wait to turn it off. It must be synchronous as we are 649 * about to suspend or unload the driver. 650 * 651 * Note that from within the work-handler, we cannot flush 652 * ourselves, so only flush outstanding work upon suspend! 653 */ 654 if (state != FBINFO_STATE_RUNNING) 655 flush_work(&dev_priv->display.fbdev.suspend_work); 656 657 console_lock(); 658 } else { 659 /* 660 * The console lock can be pretty contented on resume due 661 * to all the printk activity. Try to keep it out of the hot 662 * path of resume if possible. 663 */ 664 drm_WARN_ON(dev, state != FBINFO_STATE_RUNNING); 665 if (!console_trylock()) { 666 /* Don't block our own workqueue as this can 667 * be run in parallel with other i915.ko tasks. 668 */ 669 schedule_work(&dev_priv->display.fbdev.suspend_work); 670 return; 671 } 672 } 673 674 /* On resume from hibernation: If the object is shmemfs backed, it has 675 * been restored from swap. If the object is stolen however, it will be 676 * full of whatever garbage was left in there. 677 */ 678 if (state == FBINFO_STATE_RUNNING && 679 !i915_gem_object_is_shmem(intel_fb_obj(&ifbdev->fb->base))) 680 memset_io(info->screen_base, 0, info->screen_size); 681 682 drm_fb_helper_set_suspend(&ifbdev->helper, state); 683 console_unlock(); 684 685 set_suspend: 686 intel_fbdev_hpd_set_suspend(dev_priv, state); 687 } 688 689 void intel_fbdev_output_poll_changed(struct drm_device *dev) 690 { 691 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 692 bool send_hpd; 693 694 if (!ifbdev) 695 return; 696 697 intel_fbdev_sync(ifbdev); 698 699 mutex_lock(&ifbdev->hpd_lock); 700 send_hpd = !ifbdev->hpd_suspended; 701 ifbdev->hpd_waiting = true; 702 mutex_unlock(&ifbdev->hpd_lock); 703 704 if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup)) 705 drm_fb_helper_hotplug_event(&ifbdev->helper); 706 } 707 708 void intel_fbdev_restore_mode(struct drm_device *dev) 709 { 710 struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev; 711 712 if (!ifbdev) 713 return; 714 715 intel_fbdev_sync(ifbdev); 716 if (!ifbdev->vma) 717 return; 718 719 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 720 intel_fbdev_invalidate(ifbdev); 721 } 722 723 struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev) 724 { 725 if (!fbdev || !fbdev->helper.fb) 726 return NULL; 727 728 return to_intel_framebuffer(fbdev->helper.fb); 729 } 730