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/module.h> 29 #include <linux/kernel.h> 30 #include <linux/console.h> 31 #include <linux/errno.h> 32 #include <linux/string.h> 33 #include <linux/mm.h> 34 #include <linux/tty.h> 35 #include <linux/sysrq.h> 36 #include <linux/delay.h> 37 #include <linux/init.h> 38 #include <linux/vga_switcheroo.h> 39 40 #include <drm/drmP.h> 41 #include <drm/drm_crtc.h> 42 #include <drm/drm_fb_helper.h> 43 #include "intel_drv.h" 44 #include "intel_frontbuffer.h" 45 #include <drm/i915_drm.h> 46 #include "i915_drv.h" 47 48 static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) 49 { 50 struct drm_i915_gem_object *obj = ifbdev->fb->obj; 51 unsigned int origin = ifbdev->vma->fence ? ORIGIN_GTT : ORIGIN_CPU; 52 53 intel_fb_obj_invalidate(obj, origin); 54 } 55 56 static int intel_fbdev_set_par(struct fb_info *info) 57 { 58 struct drm_fb_helper *fb_helper = info->par; 59 struct intel_fbdev *ifbdev = 60 container_of(fb_helper, struct intel_fbdev, helper); 61 int ret; 62 63 ret = drm_fb_helper_set_par(info); 64 if (ret == 0) 65 intel_fbdev_invalidate(ifbdev); 66 67 return ret; 68 } 69 70 static int intel_fbdev_blank(int blank, struct fb_info *info) 71 { 72 struct drm_fb_helper *fb_helper = info->par; 73 struct intel_fbdev *ifbdev = 74 container_of(fb_helper, struct intel_fbdev, helper); 75 int ret; 76 77 ret = drm_fb_helper_blank(blank, info); 78 if (ret == 0) 79 intel_fbdev_invalidate(ifbdev); 80 81 return ret; 82 } 83 84 #if 0 85 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 86 struct fb_info *info) 87 { 88 struct drm_fb_helper *fb_helper = info->par; 89 struct intel_fbdev *ifbdev = 90 container_of(fb_helper, struct intel_fbdev, helper); 91 int ret; 92 93 ret = drm_fb_helper_pan_display(var, info); 94 if (ret == 0) 95 intel_fbdev_invalidate(ifbdev); 96 97 return ret; 98 } 99 #endif 100 101 static struct fb_ops intelfb_ops = { 102 #if 0 103 .owner = THIS_MODULE, 104 #endif 105 DRM_FB_HELPER_DEFAULT_OPS, 106 .fb_set_par = intel_fbdev_set_par, 107 #if 0 108 .fb_fillrect = drm_fb_helper_cfb_fillrect, 109 .fb_copyarea = drm_fb_helper_cfb_copyarea, 110 .fb_imageblit = drm_fb_helper_cfb_imageblit, 111 .fb_pan_display = intel_fbdev_pan_display, 112 #endif 113 .fb_blank = intel_fbdev_blank, 114 }; 115 116 static int intelfb_alloc(struct drm_fb_helper *helper, 117 struct drm_fb_helper_surface_size *sizes) 118 { 119 struct intel_fbdev *ifbdev = 120 container_of(helper, struct intel_fbdev, helper); 121 struct drm_framebuffer *fb; 122 struct drm_device *dev = helper->dev; 123 struct drm_i915_private *dev_priv = to_i915(dev); 124 struct i915_ggtt *ggtt = &dev_priv->ggtt; 125 struct drm_mode_fb_cmd2 mode_cmd = {}; 126 struct drm_i915_gem_object *obj; 127 int size, ret; 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 /* If the FB is too big, just don't use it since fbdev is not very 145 * important and we should probably use that space with FBC or other 146 * features. */ 147 obj = NULL; 148 if (size * 2 < ggtt->stolen_usable_size) 149 obj = i915_gem_object_create_stolen(dev_priv, size); 150 if (obj == NULL) 151 obj = i915_gem_object_create(dev_priv, size); 152 if (IS_ERR(obj)) { 153 DRM_ERROR("failed to allocate framebuffer\n"); 154 ret = PTR_ERR(obj); 155 goto err; 156 } 157 158 fb = intel_framebuffer_create(obj, &mode_cmd); 159 if (IS_ERR(fb)) { 160 ret = PTR_ERR(fb); 161 goto err_obj; 162 } 163 164 ifbdev->fb = to_intel_framebuffer(fb); 165 166 return 0; 167 168 err_obj: 169 i915_gem_object_put(obj); 170 err: 171 return ret; 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 = dev_priv->drm.pdev; 183 struct i915_ggtt *ggtt = &dev_priv->ggtt; 184 struct fb_info *info; 185 struct drm_framebuffer *fb; 186 struct i915_vma *vma; 187 bool prealloc = false; 188 void __iomem *vaddr; 189 int ret; 190 device_t vga_dev; 191 192 if (intel_fb && 193 (sizes->fb_width > intel_fb->base.width || 194 sizes->fb_height > intel_fb->base.height)) { 195 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 196 " releasing it\n", 197 intel_fb->base.width, intel_fb->base.height, 198 sizes->fb_width, sizes->fb_height); 199 drm_framebuffer_put(&intel_fb->base); 200 intel_fb = ifbdev->fb = NULL; 201 } 202 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 203 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 204 ret = intelfb_alloc(helper, sizes); 205 if (ret) 206 return ret; 207 intel_fb = ifbdev->fb; 208 } else { 209 DRM_DEBUG_KMS("re-using BIOS fb\n"); 210 prealloc = true; 211 sizes->fb_width = intel_fb->base.width; 212 sizes->fb_height = intel_fb->base.height; 213 } 214 215 mutex_lock(&dev->struct_mutex); 216 intel_runtime_pm_get(dev_priv); 217 218 /* Pin the GGTT vma for our access via info->screen_base. 219 * This also validates that any existing fb inherited from the 220 * BIOS is suitable for own access. 221 */ 222 vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_MODE_ROTATE_0); 223 if (IS_ERR(vma)) { 224 ret = PTR_ERR(vma); 225 goto out_unlock; 226 } 227 228 info = drm_fb_helper_alloc_fbi(helper); 229 if (IS_ERR(info)) { 230 DRM_ERROR("Failed to allocate fb_info\n"); 231 ret = PTR_ERR(info); 232 goto out_unpin; 233 } 234 235 info->par = helper; 236 237 fb = &ifbdev->fb->base; 238 239 ifbdev->helper.fb = fb; 240 241 #ifdef __DragonFly__ 242 vga_dev = device_get_parent(dev->dev->bsddev); 243 info->width = sizes->fb_width; 244 info->height = sizes->fb_height; 245 info->stride = fb->pitches[0]; 246 info->depth = sizes->surface_bpp; 247 info->paddr = ggtt->mappable_base + vma->node.start; 248 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 249 info->fbops = intelfb_ops; 250 251 #else 252 strcpy(info->fix.id, "inteldrmfb"); 253 254 info->fbops = &intelfb_ops; 255 256 /* setup aperture base/size for vesafb takeover */ 257 info->apertures->ranges[0].base = dev->mode_config.fb_base; 258 info->apertures->ranges[0].size = ggtt->mappable_end; 259 260 info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma); 261 info->fix.smem_len = vma->node.size; 262 #endif 263 264 vaddr = i915_vma_pin_iomap(vma); 265 if (IS_ERR(vaddr)) { 266 DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); 267 ret = PTR_ERR(vaddr); 268 goto out_unpin; 269 } 270 #ifdef __DragonFly__ 271 info->vaddr = (vm_offset_t)vaddr; 272 #else 273 info->screen_base = vaddr; 274 info->screen_size = vma->node.size; 275 276 /* This driver doesn't need a VT switch to restore the mode on resume */ 277 info->skip_vt_switch = true; 278 279 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth); 280 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 281 282 /* If the object is shmemfs backed, it will have given us zeroed pages. 283 * If the object is stolen however, it will be full of whatever 284 * garbage was left in there. 285 */ 286 if (intel_fb->obj->stolen && !prealloc) 287 memset_io(info->screen_base, 0, info->screen_size); 288 #endif 289 290 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 291 292 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x\n", 293 fb->width, fb->height, i915_ggtt_offset(vma)); 294 ifbdev->vma = vma; 295 296 intel_runtime_pm_put(dev_priv); 297 mutex_unlock(&dev->struct_mutex); 298 vga_switcheroo_client_fb_set(pdev, info); 299 return 0; 300 301 out_unpin: 302 intel_unpin_fb_vma(vma); 303 out_unlock: 304 intel_runtime_pm_put(dev_priv); 305 mutex_unlock(&dev->struct_mutex); 306 return ret; 307 } 308 309 static struct drm_fb_helper_crtc * 310 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 311 { 312 int i; 313 314 for (i = 0; i < fb_helper->crtc_count; i++) 315 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 316 return &fb_helper->crtc_info[i]; 317 318 return NULL; 319 } 320 321 /* 322 * Try to read the BIOS display configuration and use it for the initial 323 * fb configuration. 324 * 325 * The BIOS or boot loader will generally create an initial display 326 * configuration for us that includes some set of active pipes and displays. 327 * This routine tries to figure out which pipes and connectors are active 328 * and stuffs them into the crtcs and modes array given to us by the 329 * drm_fb_helper code. 330 * 331 * The overall sequence is: 332 * intel_fbdev_init - from driver load 333 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 334 * drm_fb_helper_init - build fb helper structs 335 * drm_fb_helper_single_add_all_connectors - more fb helper structs 336 * intel_fbdev_initial_config - apply the config 337 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 338 * drm_setup_crtcs - build crtc config for fbdev 339 * intel_fb_initial_config - find active connectors etc 340 * drm_fb_helper_single_fb_probe - set up fbdev 341 * intelfb_create - re-use or alloc fb, build out fbdev structs 342 * 343 * Note that we don't make special consideration whether we could actually 344 * switch to the selected modes without a full modeset. E.g. when the display 345 * is in VGA mode we need to recalculate watermarks and set a new high-res 346 * framebuffer anyway. 347 */ 348 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 349 struct drm_fb_helper_crtc **crtcs, 350 struct drm_display_mode **modes, 351 struct drm_fb_offset *offsets, 352 bool *enabled, int width, int height) 353 { 354 struct drm_i915_private *dev_priv = to_i915(fb_helper->dev); 355 unsigned long conn_configured, conn_seq, mask; 356 unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); 357 int i, j; 358 bool *save_enabled; 359 bool fallback = true, ret = true; 360 int num_connectors_enabled = 0; 361 int num_connectors_detected = 0; 362 struct drm_modeset_acquire_ctx ctx; 363 364 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); 365 if (!save_enabled) 366 return false; 367 368 drm_modeset_acquire_init(&ctx, 0); 369 370 while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0) 371 drm_modeset_backoff(&ctx); 372 373 memcpy(save_enabled, enabled, count); 374 mask = GENMASK(count - 1, 0); 375 conn_configured = 0; 376 retry: 377 conn_seq = conn_configured; 378 for (i = 0; i < count; i++) { 379 struct drm_fb_helper_connector *fb_conn; 380 struct drm_connector *connector; 381 struct drm_encoder *encoder; 382 struct drm_fb_helper_crtc *new_crtc; 383 384 fb_conn = fb_helper->connector_info[i]; 385 connector = fb_conn->connector; 386 387 if (conn_configured & BIT(i)) 388 continue; 389 390 if (conn_seq == 0 && !connector->has_tile) 391 continue; 392 393 if (connector->status == connector_status_connected) 394 num_connectors_detected++; 395 396 if (!enabled[i]) { 397 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 398 connector->name); 399 conn_configured |= BIT(i); 400 continue; 401 } 402 403 if (connector->force == DRM_FORCE_OFF) { 404 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 405 connector->name); 406 enabled[i] = false; 407 continue; 408 } 409 410 encoder = connector->state->best_encoder; 411 if (!encoder || WARN_ON(!connector->state->crtc)) { 412 if (connector->force > DRM_FORCE_OFF) 413 goto bail; 414 415 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 416 connector->name); 417 enabled[i] = false; 418 conn_configured |= BIT(i); 419 continue; 420 } 421 422 num_connectors_enabled++; 423 424 new_crtc = intel_fb_helper_crtc(fb_helper, 425 connector->state->crtc); 426 427 /* 428 * Make sure we're not trying to drive multiple connectors 429 * with a single CRTC, since our cloning support may not 430 * match the BIOS. 431 */ 432 for (j = 0; j < count; j++) { 433 if (crtcs[j] == new_crtc) { 434 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 435 goto bail; 436 } 437 } 438 439 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 440 connector->name); 441 442 /* go for command line mode first */ 443 modes[i] = drm_pick_cmdline_mode(fb_conn); 444 445 /* try for preferred next */ 446 if (!modes[i]) { 447 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", 448 connector->name, connector->has_tile); 449 modes[i] = drm_has_preferred_mode(fb_conn, width, 450 height); 451 } 452 453 /* No preferred mode marked by the EDID? Are there any modes? */ 454 if (!modes[i] && !list_empty(&connector->modes)) { 455 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 456 connector->name); 457 modes[i] = list_first_entry(&connector->modes, 458 struct drm_display_mode, 459 head); 460 } 461 462 /* last resort: use current mode */ 463 if (!modes[i]) { 464 /* 465 * IMPORTANT: We want to use the adjusted mode (i.e. 466 * after the panel fitter upscaling) as the initial 467 * config, not the input mode, which is what crtc->mode 468 * usually contains. But since our current 469 * code puts a mode derived from the post-pfit timings 470 * into crtc->mode this works out correctly. 471 * 472 * This is crtc->mode and not crtc->state->mode for the 473 * fastboot check to work correctly. crtc_state->mode has 474 * I915_MODE_FLAG_INHERITED, which we clear to force check 475 * state. 476 */ 477 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 478 connector->name); 479 modes[i] = &connector->state->crtc->mode; 480 } 481 crtcs[i] = new_crtc; 482 483 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", 484 connector->name, 485 connector->state->crtc->base.id, 486 connector->state->crtc->name, 487 modes[i]->hdisplay, modes[i]->vdisplay, 488 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 489 490 fallback = false; 491 conn_configured |= BIT(i); 492 } 493 494 if ((conn_configured & mask) != mask && conn_configured != conn_seq) 495 goto retry; 496 497 /* 498 * If the BIOS didn't enable everything it could, fall back to have the 499 * same user experiencing of lighting up as much as possible like the 500 * fbdev helper library. 501 */ 502 if (num_connectors_enabled != num_connectors_detected && 503 num_connectors_enabled < INTEL_INFO(dev_priv)->num_pipes) { 504 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 505 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 506 num_connectors_detected); 507 fallback = true; 508 } 509 510 if (fallback) { 511 bail: 512 DRM_DEBUG_KMS("Not using firmware configuration\n"); 513 memcpy(enabled, save_enabled, count); 514 ret = false; 515 } 516 517 drm_modeset_drop_locks(&ctx); 518 drm_modeset_acquire_fini(&ctx); 519 520 kfree(save_enabled); 521 return ret; 522 } 523 524 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 525 .initial_config = intel_fb_initial_config, 526 .fb_probe = intelfb_create, 527 }; 528 529 static void intel_fbdev_destroy(struct intel_fbdev *ifbdev) 530 { 531 /* We rely on the object-free to release the VMA pinning for 532 * the info->screen_base mmaping. Leaking the VMA is simpler than 533 * trying to rectify all the possible error paths leading here. 534 */ 535 536 drm_fb_helper_fini(&ifbdev->helper); 537 538 if (ifbdev->vma) { 539 mutex_lock(&ifbdev->helper.dev->struct_mutex); 540 intel_unpin_fb_vma(ifbdev->vma); 541 mutex_unlock(&ifbdev->helper.dev->struct_mutex); 542 } 543 544 if (ifbdev->fb) 545 drm_framebuffer_remove(&ifbdev->fb->base); 546 547 kfree(ifbdev); 548 } 549 550 /* 551 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 552 * The core display code will have read out the current plane configuration, 553 * so we use that to figure out if there's an object for us to use as the 554 * fb, and if so, we re-use it for the fbdev configuration. 555 * 556 * Note we only support a single fb shared across pipes for boot (mostly for 557 * fbcon), so we just find the biggest and use that. 558 */ 559 static bool intel_fbdev_init_bios(struct drm_device *dev, 560 struct intel_fbdev *ifbdev) 561 { 562 struct intel_framebuffer *fb = NULL; 563 struct drm_crtc *crtc; 564 struct intel_crtc *intel_crtc; 565 unsigned int max_size = 0; 566 567 /* Find the largest fb */ 568 for_each_crtc(dev, crtc) { 569 struct drm_i915_gem_object *obj = 570 intel_fb_obj(crtc->primary->state->fb); 571 intel_crtc = to_intel_crtc(crtc); 572 573 if (!crtc->state->active || !obj) { 574 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 575 pipe_name(intel_crtc->pipe)); 576 continue; 577 } 578 579 if (obj->base.size > max_size) { 580 DRM_DEBUG_KMS("found possible fb from plane %c\n", 581 pipe_name(intel_crtc->pipe)); 582 fb = to_intel_framebuffer(crtc->primary->state->fb); 583 max_size = obj->base.size; 584 } 585 } 586 587 if (!fb) { 588 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 589 goto out; 590 } 591 592 /* Now make sure all the pipes will fit into it */ 593 for_each_crtc(dev, crtc) { 594 unsigned int cur_size; 595 596 intel_crtc = to_intel_crtc(crtc); 597 598 if (!crtc->state->active) { 599 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 600 pipe_name(intel_crtc->pipe)); 601 continue; 602 } 603 604 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 605 pipe_name(intel_crtc->pipe)); 606 607 /* 608 * See if the plane fb we found above will fit on this 609 * pipe. Note we need to use the selected fb's pitch and bpp 610 * rather than the current pipe's, since they differ. 611 */ 612 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay; 613 cur_size = cur_size * fb->base.format->cpp[0]; 614 if (fb->base.pitches[0] < cur_size) { 615 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 616 pipe_name(intel_crtc->pipe), 617 cur_size, fb->base.pitches[0]); 618 fb = NULL; 619 break; 620 } 621 622 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay; 623 cur_size = intel_fb_align_height(&fb->base, 0, cur_size); 624 cur_size *= fb->base.pitches[0]; 625 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 626 pipe_name(intel_crtc->pipe), 627 intel_crtc->config->base.adjusted_mode.crtc_hdisplay, 628 intel_crtc->config->base.adjusted_mode.crtc_vdisplay, 629 fb->base.format->cpp[0] * 8, 630 cur_size); 631 632 if (cur_size > max_size) { 633 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 634 pipe_name(intel_crtc->pipe), 635 cur_size, max_size); 636 fb = NULL; 637 break; 638 } 639 640 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 641 pipe_name(intel_crtc->pipe), 642 max_size, cur_size); 643 } 644 645 if (!fb) { 646 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 647 goto out; 648 } 649 650 ifbdev->preferred_bpp = fb->base.format->cpp[0] * 8; 651 ifbdev->fb = fb; 652 653 drm_framebuffer_get(&ifbdev->fb->base); 654 655 /* Final pass to check if any active pipes don't have fbs */ 656 for_each_crtc(dev, crtc) { 657 intel_crtc = to_intel_crtc(crtc); 658 659 if (!crtc->state->active) 660 continue; 661 662 WARN(!crtc->primary->fb, 663 "re-used BIOS config but lost an fb on crtc %d\n", 664 crtc->base.id); 665 } 666 667 668 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 669 return true; 670 671 out: 672 673 return false; 674 } 675 676 static void intel_fbdev_suspend_worker(struct work_struct *work) 677 { 678 intel_fbdev_set_suspend(&container_of(work, 679 struct drm_i915_private, 680 fbdev_suspend_work)->drm, 681 FBINFO_STATE_RUNNING, 682 true); 683 } 684 685 int intel_fbdev_init(struct drm_device *dev) 686 { 687 struct drm_i915_private *dev_priv = to_i915(dev); 688 struct intel_fbdev *ifbdev; 689 int ret; 690 691 if (WARN_ON(INTEL_INFO(dev_priv)->num_pipes == 0)) 692 return -ENODEV; 693 694 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 695 if (ifbdev == NULL) 696 return -ENOMEM; 697 698 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 699 700 if (!intel_fbdev_init_bios(dev, ifbdev)) 701 ifbdev->preferred_bpp = 32; 702 703 ret = drm_fb_helper_init(dev, &ifbdev->helper, 4); 704 if (ret) { 705 kfree(ifbdev); 706 return ret; 707 } 708 709 dev_priv->fbdev = ifbdev; 710 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 711 712 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 713 714 return 0; 715 } 716 717 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 718 { 719 struct intel_fbdev *ifbdev = data; 720 721 /* Due to peculiar init order wrt to hpd handling this is separate. */ 722 if (drm_fb_helper_initial_config(&ifbdev->helper, 723 ifbdev->preferred_bpp)) 724 intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); 725 } 726 727 void intel_fbdev_initial_config_async(struct drm_device *dev) 728 { 729 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 730 731 if (!ifbdev) 732 return; 733 734 ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); 735 } 736 737 static void intel_fbdev_sync(struct intel_fbdev *ifbdev) 738 { 739 if (!ifbdev->cookie) 740 return; 741 742 /* Only serialises with all preceding async calls, hence +1 */ 743 async_synchronize_cookie(ifbdev->cookie + 1); 744 ifbdev->cookie = 0; 745 } 746 747 void intel_fbdev_unregister(struct drm_i915_private *dev_priv) 748 { 749 struct intel_fbdev *ifbdev = dev_priv->fbdev; 750 751 if (!ifbdev) 752 return; 753 754 cancel_work_sync(&dev_priv->fbdev_suspend_work); 755 if (!current_is_async()) 756 intel_fbdev_sync(ifbdev); 757 758 drm_fb_helper_unregister_fbi(&ifbdev->helper); 759 } 760 761 void intel_fbdev_fini(struct drm_i915_private *dev_priv) 762 { 763 struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev); 764 765 if (!ifbdev) 766 return; 767 768 intel_fbdev_destroy(ifbdev); 769 } 770 771 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 772 { 773 #if 0 774 struct drm_i915_private *dev_priv = to_i915(dev); 775 struct intel_fbdev *ifbdev = dev_priv->fbdev; 776 struct fb_info *info; 777 778 if (!ifbdev || !ifbdev->vma) 779 return; 780 781 info = ifbdev->helper.fbdev; 782 783 if (synchronous) { 784 /* Flush any pending work to turn the console on, and then 785 * wait to turn it off. It must be synchronous as we are 786 * about to suspend or unload the driver. 787 * 788 * Note that from within the work-handler, we cannot flush 789 * ourselves, so only flush outstanding work upon suspend! 790 */ 791 if (state != FBINFO_STATE_RUNNING) 792 flush_work(&dev_priv->fbdev_suspend_work); 793 console_lock(); 794 } else { 795 /* 796 * The console lock can be pretty contented on resume due 797 * to all the printk activity. Try to keep it out of the hot 798 * path of resume if possible. 799 */ 800 WARN_ON(state != FBINFO_STATE_RUNNING); 801 if (!console_trylock()) { 802 /* Don't block our own workqueue as this can 803 * be run in parallel with other i915.ko tasks. 804 */ 805 schedule_work(&dev_priv->fbdev_suspend_work); 806 return; 807 } 808 } 809 810 /* On resume from hibernation: If the object is shmemfs backed, it has 811 * been restored from swap. If the object is stolen however, it will be 812 * full of whatever garbage was left in there. 813 */ 814 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 815 memset_io(info->screen_base, 0, info->screen_size); 816 817 drm_fb_helper_set_suspend(&ifbdev->helper, state); 818 console_unlock(); 819 #endif 820 } 821 822 void intel_fbdev_output_poll_changed(struct drm_device *dev) 823 { 824 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 825 826 if (!ifbdev) 827 return; 828 829 intel_fbdev_sync(ifbdev); 830 if (ifbdev->vma) 831 drm_fb_helper_hotplug_event(&ifbdev->helper); 832 } 833 834 void intel_fbdev_restore_mode(struct drm_device *dev) 835 { 836 struct intel_fbdev *ifbdev = to_i915(dev)->fbdev; 837 838 if (!ifbdev) 839 return; 840 841 intel_fbdev_sync(ifbdev); 842 if (!ifbdev->vma) 843 return; 844 845 #ifdef __DragonFly__ 846 /* XXX: avoid dead-locking the Xorg on exit */ 847 if (mutex_is_locked(&dev->mode_config.mutex)) { 848 DRM_ERROR("fubar while trying to restore kms_console\n"); 849 return; /* drm_modeset_unlock_all(dev) ? */ 850 } 851 #endif 852 853 if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0) 854 intel_fbdev_invalidate(ifbdev); 855 } 856