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 <drm/drmP.h> 28 #include <linux/async.h> 29 #include <linux/module.h> 30 #include <linux/kernel.h> 31 #include <linux/errno.h> 32 #include <linux/string.h> 33 #include <linux/mm.h> 34 #include <linux/delay.h> 35 #include <linux/fb.h> 36 37 #include <drm/drmP.h> 38 #include <drm/drm_crtc.h> 39 #include <drm/drm_fb_helper.h> 40 #include "intel_drv.h" 41 #include <drm/i915_drm.h> 42 #include "i915_drv.h" 43 44 #if 0 45 static int intel_fbdev_set_par(struct fb_info *info) 46 { 47 struct drm_fb_helper *fb_helper = info->par; 48 struct intel_fbdev *ifbdev = 49 container_of(fb_helper, struct intel_fbdev, helper); 50 int ret; 51 52 ret = drm_fb_helper_set_par(info); 53 54 if (ret == 0) { 55 /* 56 * FIXME: fbdev presumes that all callbacks also work from 57 * atomic contexts and relies on that for emergency oops 58 * printing. KMS totally doesn't do that and the locking here is 59 * by far not the only place this goes wrong. Ignore this for 60 * now until we solve this for real. 61 */ 62 mutex_lock(&fb_helper->dev->struct_mutex); 63 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj, 64 true); 65 mutex_unlock(&fb_helper->dev->struct_mutex); 66 } 67 68 return ret; 69 } 70 71 static struct fb_ops intelfb_ops = { 72 .owner = THIS_MODULE, 73 .fb_check_var = drm_fb_helper_check_var, 74 .fb_set_par = intel_fbdev_set_par, 75 .fb_fillrect = cfb_fillrect, 76 .fb_copyarea = cfb_copyarea, 77 .fb_imageblit = cfb_imageblit, 78 .fb_pan_display = drm_fb_helper_pan_display, 79 .fb_blank = drm_fb_helper_blank, 80 .fb_setcmap = drm_fb_helper_setcmap, 81 .fb_debug_enter = drm_fb_helper_debug_enter, 82 .fb_debug_leave = drm_fb_helper_debug_leave, 83 }; 84 #endif 85 86 static int intelfb_alloc(struct drm_fb_helper *helper, 87 struct drm_fb_helper_surface_size *sizes) 88 { 89 struct intel_fbdev *ifbdev = 90 container_of(helper, struct intel_fbdev, helper); 91 struct drm_framebuffer *fb; 92 struct drm_device *dev = helper->dev; 93 struct drm_mode_fb_cmd2 mode_cmd = {}; 94 struct drm_i915_gem_object *obj; 95 int size, ret; 96 97 /* we don't do packed 24bpp */ 98 if (sizes->surface_bpp == 24) 99 sizes->surface_bpp = 32; 100 101 mode_cmd.width = sizes->surface_width; 102 mode_cmd.height = sizes->surface_height; 103 104 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 105 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 106 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 107 sizes->surface_depth); 108 109 size = mode_cmd.pitches[0] * mode_cmd.height; 110 size = PAGE_ALIGN(size); 111 obj = i915_gem_object_create_stolen(dev, size); 112 if (obj == NULL) 113 obj = i915_gem_alloc_object(dev, size); 114 if (!obj) { 115 DRM_ERROR("failed to allocate framebuffer\n"); 116 ret = -ENOMEM; 117 goto out; 118 } 119 120 /* Flush everything out, we'll be doing GTT only from now on */ 121 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL); 122 if (ret) { 123 DRM_ERROR("failed to pin obj: %d\n", ret); 124 goto out_unref; 125 } 126 127 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 128 if (IS_ERR(fb)) { 129 ret = PTR_ERR(fb); 130 goto out_unpin; 131 } 132 133 ifbdev->fb = to_intel_framebuffer(fb); 134 135 return 0; 136 137 out_unpin: 138 i915_gem_object_ggtt_unpin(obj); 139 out_unref: 140 drm_gem_object_unreference(&obj->base); 141 out: 142 return ret; 143 } 144 145 static int intelfb_create(struct drm_fb_helper *helper, 146 struct drm_fb_helper_surface_size *sizes) 147 { 148 struct intel_fbdev *ifbdev = 149 container_of(helper, struct intel_fbdev, helper); 150 struct intel_framebuffer *intel_fb = ifbdev->fb; 151 struct drm_device *dev = helper->dev; 152 struct drm_i915_private *dev_priv = dev->dev_private; 153 struct fb_info *info; 154 struct drm_framebuffer *fb; 155 struct drm_i915_gem_object *obj; 156 device_t vga_dev; 157 int size, ret; 158 bool prealloc = false; 159 160 mutex_lock(&dev->struct_mutex); 161 162 if (intel_fb && 163 (sizes->fb_width > intel_fb->base.width || 164 sizes->fb_height > intel_fb->base.height)) { 165 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 166 " releasing it\n", 167 intel_fb->base.width, intel_fb->base.height, 168 sizes->fb_width, sizes->fb_height); 169 drm_framebuffer_unreference(&intel_fb->base); 170 intel_fb = ifbdev->fb = NULL; 171 } 172 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 173 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 174 ret = intelfb_alloc(helper, sizes); 175 if (ret) 176 goto out_unlock; 177 intel_fb = ifbdev->fb; 178 } else { 179 DRM_DEBUG_KMS("re-using BIOS fb\n"); 180 prealloc = true; 181 sizes->fb_width = intel_fb->base.width; 182 sizes->fb_height = intel_fb->base.height; 183 } 184 185 obj = intel_fb->obj; 186 size = obj->base.size; 187 188 #if 0 189 info = framebuffer_alloc(0, &dev->pdev->dev); 190 #else 191 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO); 192 #endif 193 if (!info) { 194 ret = -ENOMEM; 195 goto out_unpin; 196 } 197 #if 0 198 info->par = helper; 199 #endif 200 201 #ifdef __DragonFly__ 202 vga_dev = device_get_parent(dev->dev); 203 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO); 204 info->width = sizes->fb_width; 205 info->height = sizes->fb_height; 206 info->stride = 207 ALIGN(sizes->surface_width * ((sizes->surface_bpp + 7) / 8), 64); 208 info->depth = sizes->surface_bpp; 209 info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj); 210 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 211 info->vaddr = 212 (vm_offset_t)pmap_mapdev_attr(info->paddr, 213 sizes->surface_height * info->stride, 214 VM_MEMATTR_WRITE_COMBINING); 215 #endif 216 217 fb = &ifbdev->fb->base; 218 219 ifbdev->helper.fb = fb; 220 ifbdev->helper.fbdev = info; 221 222 #if 0 223 strcpy(info->fix.id, "inteldrmfb"); 224 225 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 226 info->fbops = &intelfb_ops; 227 228 ret = fb_alloc_cmap(&info->cmap, 256, 0); 229 if (ret) { 230 ret = -ENOMEM; 231 goto out_unpin; 232 } 233 /* setup aperture base/size for vesafb takeover */ 234 info->apertures = alloc_apertures(1); 235 if (!info->apertures) { 236 ret = -ENOMEM; 237 goto out_unpin; 238 } 239 info->apertures->ranges[0].base = dev->mode_config.fb_base; 240 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 241 242 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 243 info->fix.smem_len = size; 244 245 info->screen_base = 246 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 247 size); 248 if (!info->screen_base) { 249 ret = -ENOSPC; 250 goto out_unpin; 251 } 252 info->screen_size = size; 253 254 /* This driver doesn't need a VT switch to restore the mode on resume */ 255 info->skip_vt_switch = true; 256 257 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 258 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 259 260 /* If the object is shmemfs backed, it will have given us zeroed pages. 261 * If the object is stolen however, it will be full of whatever 262 * garbage was left in there. 263 */ 264 if (ifbdev->fb->obj->stolen && !prealloc) 265 memset_io(info->screen_base, 0, info->screen_size); 266 267 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 268 #endif 269 270 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", 271 fb->width, fb->height, 272 i915_gem_obj_ggtt_offset(obj), obj); 273 274 mutex_unlock(&dev->struct_mutex); 275 #if 0 276 vga_switcheroo_client_fb_set(dev->pdev, info); 277 #endif 278 return 0; 279 280 out_unpin: 281 i915_gem_object_ggtt_unpin(obj); 282 drm_gem_object_unreference(&obj->base); 283 out_unlock: 284 mutex_unlock(&dev->struct_mutex); 285 return ret; 286 } 287 288 /** Sets the color ramps on behalf of RandR */ 289 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 290 u16 blue, int regno) 291 { 292 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 293 294 intel_crtc->lut_r[regno] = red >> 8; 295 intel_crtc->lut_g[regno] = green >> 8; 296 intel_crtc->lut_b[regno] = blue >> 8; 297 } 298 299 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 300 u16 *blue, int regno) 301 { 302 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 303 304 *red = intel_crtc->lut_r[regno] << 8; 305 *green = intel_crtc->lut_g[regno] << 8; 306 *blue = intel_crtc->lut_b[regno] << 8; 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 bool *enabled, int width, int height) 352 { 353 struct drm_device *dev = fb_helper->dev; 354 int i, j; 355 bool *save_enabled; 356 bool fallback = true; 357 int num_connectors_enabled = 0; 358 int num_connectors_detected = 0; 359 360 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), 361 GFP_KERNEL); 362 if (!save_enabled) 363 return false; 364 365 memcpy(save_enabled, enabled, dev->mode_config.num_connector); 366 367 for (i = 0; i < fb_helper->connector_count; i++) { 368 struct drm_fb_helper_connector *fb_conn; 369 struct drm_connector *connector; 370 struct drm_encoder *encoder; 371 struct drm_fb_helper_crtc *new_crtc; 372 373 fb_conn = fb_helper->connector_info[i]; 374 connector = fb_conn->connector; 375 376 if (connector->status == connector_status_connected) 377 num_connectors_detected++; 378 379 if (!enabled[i]) { 380 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 381 connector->name); 382 continue; 383 } 384 385 if (connector->force == DRM_FORCE_OFF) { 386 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 387 connector->name); 388 enabled[i] = false; 389 continue; 390 } 391 392 encoder = connector->encoder; 393 if (!encoder || WARN_ON(!encoder->crtc)) { 394 if (connector->force > DRM_FORCE_OFF) 395 goto bail; 396 397 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 398 connector->name); 399 enabled[i] = false; 400 continue; 401 } 402 403 num_connectors_enabled++; 404 405 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); 406 407 /* 408 * Make sure we're not trying to drive multiple connectors 409 * with a single CRTC, since our cloning support may not 410 * match the BIOS. 411 */ 412 for (j = 0; j < fb_helper->connector_count; j++) { 413 if (crtcs[j] == new_crtc) { 414 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 415 goto bail; 416 } 417 } 418 419 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 420 connector->name); 421 422 /* go for command line mode first */ 423 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 424 425 /* try for preferred next */ 426 if (!modes[i]) { 427 DRM_DEBUG_KMS("looking for preferred mode on connector %s\n", 428 connector->name); 429 modes[i] = drm_has_preferred_mode(fb_conn, width, 430 height); 431 } 432 433 /* No preferred mode marked by the EDID? Are there any modes? */ 434 if (!modes[i] && !list_empty(&connector->modes)) { 435 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 436 connector->name); 437 modes[i] = list_first_entry(&connector->modes, 438 struct drm_display_mode, 439 head); 440 } 441 442 /* last resort: use current mode */ 443 if (!modes[i]) { 444 /* 445 * IMPORTANT: We want to use the adjusted mode (i.e. 446 * after the panel fitter upscaling) as the initial 447 * config, not the input mode, which is what crtc->mode 448 * usually contains. But since our current fastboot 449 * code puts a mode derived from the post-pfit timings 450 * into crtc->mode this works out correctly. We don't 451 * use hwmode anywhere right now, so use it for this 452 * since the fb helper layer wants a pointer to 453 * something we own. 454 */ 455 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 456 connector->name); 457 intel_mode_from_pipe_config(&encoder->crtc->hwmode, 458 &to_intel_crtc(encoder->crtc)->config); 459 modes[i] = &encoder->crtc->hwmode; 460 } 461 crtcs[i] = new_crtc; 462 463 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 464 connector->name, 465 pipe_name(to_intel_crtc(encoder->crtc)->pipe), 466 encoder->crtc->base.id, 467 modes[i]->hdisplay, modes[i]->vdisplay, 468 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 469 470 fallback = false; 471 } 472 473 /* 474 * If the BIOS didn't enable everything it could, fall back to have the 475 * same user experiencing of lighting up as much as possible like the 476 * fbdev helper library. 477 */ 478 if (num_connectors_enabled != num_connectors_detected && 479 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 480 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 481 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 482 num_connectors_detected); 483 fallback = true; 484 } 485 486 if (fallback) { 487 bail: 488 DRM_DEBUG_KMS("Not using firmware configuration\n"); 489 memcpy(enabled, save_enabled, dev->mode_config.num_connector); 490 kfree(save_enabled); 491 return false; 492 } 493 494 kfree(save_enabled); 495 return true; 496 } 497 498 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 499 .initial_config = intel_fb_initial_config, 500 .gamma_set = intel_crtc_fb_gamma_set, 501 .gamma_get = intel_crtc_fb_gamma_get, 502 .fb_probe = intelfb_create, 503 }; 504 505 static void intel_fbdev_destroy(struct drm_device *dev, 506 struct intel_fbdev *ifbdev) 507 { 508 #if 0 509 if (ifbdev->helper.fbdev) { 510 struct fb_info *info = ifbdev->helper.fbdev; 511 512 unregister_framebuffer(info); 513 iounmap(info->screen_base); 514 if (info->cmap.len) 515 fb_dealloc_cmap(&info->cmap); 516 517 framebuffer_release(info); 518 } 519 #endif 520 521 drm_fb_helper_fini(&ifbdev->helper); 522 523 drm_framebuffer_unregister_private(&ifbdev->fb->base); 524 drm_framebuffer_unreference(&ifbdev->fb->base); 525 } 526 527 /* 528 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 529 * The core display code will have read out the current plane configuration, 530 * so we use that to figure out if there's an object for us to use as the 531 * fb, and if so, we re-use it for the fbdev configuration. 532 * 533 * Note we only support a single fb shared across pipes for boot (mostly for 534 * fbcon), so we just find the biggest and use that. 535 */ 536 static bool intel_fbdev_init_bios(struct drm_device *dev, 537 struct intel_fbdev *ifbdev) 538 { 539 struct intel_framebuffer *fb = NULL; 540 struct drm_crtc *crtc; 541 struct intel_crtc *intel_crtc; 542 struct intel_plane_config *plane_config = NULL; 543 unsigned int max_size = 0; 544 545 if (!i915.fastboot) 546 return false; 547 548 /* Find the largest fb */ 549 for_each_crtc(dev, crtc) { 550 intel_crtc = to_intel_crtc(crtc); 551 552 if (!intel_crtc->active || !crtc->primary->fb) { 553 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 554 pipe_name(intel_crtc->pipe)); 555 continue; 556 } 557 558 if (intel_crtc->plane_config.size > max_size) { 559 DRM_DEBUG_KMS("found possible fb from plane %c\n", 560 pipe_name(intel_crtc->pipe)); 561 plane_config = &intel_crtc->plane_config; 562 fb = to_intel_framebuffer(crtc->primary->fb); 563 max_size = plane_config->size; 564 } 565 } 566 567 if (!fb) { 568 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 569 goto out; 570 } 571 572 /* Now make sure all the pipes will fit into it */ 573 for_each_crtc(dev, crtc) { 574 unsigned int cur_size; 575 576 intel_crtc = to_intel_crtc(crtc); 577 578 if (!intel_crtc->active) { 579 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 580 pipe_name(intel_crtc->pipe)); 581 continue; 582 } 583 584 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 585 pipe_name(intel_crtc->pipe)); 586 587 /* 588 * See if the plane fb we found above will fit on this 589 * pipe. Note we need to use the selected fb's pitch and bpp 590 * rather than the current pipe's, since they differ. 591 */ 592 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay; 593 cur_size = cur_size * fb->base.bits_per_pixel / 8; 594 if (fb->base.pitches[0] < cur_size) { 595 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 596 pipe_name(intel_crtc->pipe), 597 cur_size, fb->base.pitches[0]); 598 plane_config = NULL; 599 fb = NULL; 600 break; 601 } 602 603 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay; 604 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1); 605 cur_size *= fb->base.pitches[0]; 606 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 607 pipe_name(intel_crtc->pipe), 608 intel_crtc->config.adjusted_mode.crtc_hdisplay, 609 intel_crtc->config.adjusted_mode.crtc_vdisplay, 610 fb->base.bits_per_pixel, 611 cur_size); 612 613 if (cur_size > max_size) { 614 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 615 pipe_name(intel_crtc->pipe), 616 cur_size, max_size); 617 plane_config = NULL; 618 fb = NULL; 619 break; 620 } 621 622 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 623 pipe_name(intel_crtc->pipe), 624 max_size, cur_size); 625 } 626 627 if (!fb) { 628 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 629 goto out; 630 } 631 632 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 633 ifbdev->fb = fb; 634 635 drm_framebuffer_reference(&ifbdev->fb->base); 636 637 /* Final pass to check if any active pipes don't have fbs */ 638 for_each_crtc(dev, crtc) { 639 intel_crtc = to_intel_crtc(crtc); 640 641 if (!intel_crtc->active) 642 continue; 643 644 WARN(!crtc->primary->fb, 645 "re-used BIOS config but lost an fb on crtc %d\n", 646 crtc->base.id); 647 } 648 649 650 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 651 return true; 652 653 out: 654 655 return false; 656 } 657 658 static void intel_fbdev_suspend_worker(struct work_struct *work) 659 { 660 intel_fbdev_set_suspend(container_of(work, 661 struct drm_i915_private, 662 fbdev_suspend_work)->dev, 663 FBINFO_STATE_RUNNING, 664 true); 665 } 666 667 int intel_fbdev_init(struct drm_device *dev) 668 { 669 struct intel_fbdev *ifbdev; 670 struct drm_i915_private *dev_priv = dev->dev_private; 671 int ret; 672 673 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 674 return -ENODEV; 675 676 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 677 if (ifbdev == NULL) 678 return -ENOMEM; 679 680 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 681 682 if (!intel_fbdev_init_bios(dev, ifbdev)) 683 ifbdev->preferred_bpp = 32; 684 685 ret = drm_fb_helper_init(dev, &ifbdev->helper, 686 INTEL_INFO(dev)->num_pipes, 4); 687 if (ret) { 688 kfree(ifbdev); 689 return ret; 690 } 691 692 dev_priv->fbdev = ifbdev; 693 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 694 695 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 696 697 return 0; 698 } 699 700 void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 701 { 702 struct drm_i915_private *dev_priv = data; 703 704 /* Due to peculiar init order wrt to hpd handling this is separate. */ 705 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32); 706 } 707 708 void intel_fbdev_fini(struct drm_device *dev) 709 { 710 struct drm_i915_private *dev_priv = dev->dev_private; 711 if (!dev_priv->fbdev) 712 return; 713 714 #if 0 715 flush_work(&dev_priv->fbdev_suspend_work); 716 #endif 717 718 async_synchronize_full(); 719 intel_fbdev_destroy(dev, dev_priv->fbdev); 720 kfree(dev_priv->fbdev); 721 dev_priv->fbdev = NULL; 722 } 723 724 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 725 { 726 #if 0 727 struct drm_i915_private *dev_priv = dev->dev_private; 728 struct intel_fbdev *ifbdev = dev_priv->fbdev; 729 struct fb_info *info; 730 731 if (!ifbdev) 732 return; 733 734 info = ifbdev->helper.fbdev; 735 736 if (synchronous) { 737 /* Flush any pending work to turn the console on, and then 738 * wait to turn it off. It must be synchronous as we are 739 * about to suspend or unload the driver. 740 * 741 * Note that from within the work-handler, we cannot flush 742 * ourselves, so only flush outstanding work upon suspend! 743 */ 744 if (state != FBINFO_STATE_RUNNING) 745 flush_work(&dev_priv->fbdev_suspend_work); 746 console_lock(); 747 } else { 748 /* 749 * The console lock can be pretty contented on resume due 750 * to all the printk activity. Try to keep it out of the hot 751 * path of resume if possible. 752 */ 753 WARN_ON(state != FBINFO_STATE_RUNNING); 754 if (!console_trylock()) { 755 /* Don't block our own workqueue as this can 756 * be run in parallel with other i915.ko tasks. 757 */ 758 schedule_work(&dev_priv->fbdev_suspend_work); 759 return; 760 } 761 } 762 763 /* On resume from hibernation: If the object is shmemfs backed, it has 764 * been restored from swap. If the object is stolen however, it will be 765 * full of whatever garbage was left in there. 766 */ 767 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 768 memset_io(info->screen_base, 0, info->screen_size); 769 770 fb_set_suspend(info, state); 771 console_unlock(); 772 #endif 773 } 774 775 void intel_fbdev_output_poll_changed(struct drm_device *dev) 776 { 777 struct drm_i915_private *dev_priv = dev->dev_private; 778 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 779 } 780 781 void intel_fbdev_restore_mode(struct drm_device *dev) 782 { 783 int ret; 784 struct drm_i915_private *dev_priv = dev->dev_private; 785 786 if (INTEL_INFO(dev)->num_pipes == 0) 787 return; 788 789 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); 790 if (ret) 791 DRM_DEBUG("failed to restore crtc mode\n"); 792 } 793