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 fb = &ifbdev->fb->base; 202 203 #ifdef __DragonFly__ 204 vga_dev = device_get_parent(dev->dev); 205 info->width = sizes->fb_width; 206 info->height = sizes->fb_height; 207 info->stride = fb->pitches[0]; 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 ifbdev->helper.fb = fb; 218 ifbdev->helper.fbdev = info; 219 220 #if 0 221 strcpy(info->fix.id, "inteldrmfb"); 222 223 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 224 info->fbops = &intelfb_ops; 225 226 ret = fb_alloc_cmap(&info->cmap, 256, 0); 227 if (ret) { 228 ret = -ENOMEM; 229 goto out_unpin; 230 } 231 /* setup aperture base/size for vesafb takeover */ 232 info->apertures = alloc_apertures(1); 233 if (!info->apertures) { 234 ret = -ENOMEM; 235 goto out_unpin; 236 } 237 info->apertures->ranges[0].base = dev->mode_config.fb_base; 238 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 239 240 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 241 info->fix.smem_len = size; 242 243 info->screen_base = 244 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 245 size); 246 if (!info->screen_base) { 247 ret = -ENOSPC; 248 goto out_unpin; 249 } 250 info->screen_size = size; 251 252 /* This driver doesn't need a VT switch to restore the mode on resume */ 253 info->skip_vt_switch = true; 254 255 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 256 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 257 258 /* If the object is shmemfs backed, it will have given us zeroed pages. 259 * If the object is stolen however, it will be full of whatever 260 * garbage was left in there. 261 */ 262 if (ifbdev->fb->obj->stolen && !prealloc) 263 memset_io(info->screen_base, 0, info->screen_size); 264 265 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 266 #endif 267 268 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", 269 fb->width, fb->height, 270 i915_gem_obj_ggtt_offset(obj), obj); 271 272 mutex_unlock(&dev->struct_mutex); 273 #if 0 274 vga_switcheroo_client_fb_set(dev->pdev, info); 275 #endif 276 return 0; 277 278 out_unpin: 279 i915_gem_object_ggtt_unpin(obj); 280 drm_gem_object_unreference(&obj->base); 281 out_unlock: 282 mutex_unlock(&dev->struct_mutex); 283 return ret; 284 } 285 286 /** Sets the color ramps on behalf of RandR */ 287 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 288 u16 blue, int regno) 289 { 290 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 291 292 intel_crtc->lut_r[regno] = red >> 8; 293 intel_crtc->lut_g[regno] = green >> 8; 294 intel_crtc->lut_b[regno] = blue >> 8; 295 } 296 297 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 298 u16 *blue, int regno) 299 { 300 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 301 302 *red = intel_crtc->lut_r[regno] << 8; 303 *green = intel_crtc->lut_g[regno] << 8; 304 *blue = intel_crtc->lut_b[regno] << 8; 305 } 306 307 static struct drm_fb_helper_crtc * 308 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 309 { 310 int i; 311 312 for (i = 0; i < fb_helper->crtc_count; i++) 313 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 314 return &fb_helper->crtc_info[i]; 315 316 return NULL; 317 } 318 319 /* 320 * Try to read the BIOS display configuration and use it for the initial 321 * fb configuration. 322 * 323 * The BIOS or boot loader will generally create an initial display 324 * configuration for us that includes some set of active pipes and displays. 325 * This routine tries to figure out which pipes and connectors are active 326 * and stuffs them into the crtcs and modes array given to us by the 327 * drm_fb_helper code. 328 * 329 * The overall sequence is: 330 * intel_fbdev_init - from driver load 331 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 332 * drm_fb_helper_init - build fb helper structs 333 * drm_fb_helper_single_add_all_connectors - more fb helper structs 334 * intel_fbdev_initial_config - apply the config 335 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 336 * drm_setup_crtcs - build crtc config for fbdev 337 * intel_fb_initial_config - find active connectors etc 338 * drm_fb_helper_single_fb_probe - set up fbdev 339 * intelfb_create - re-use or alloc fb, build out fbdev structs 340 * 341 * Note that we don't make special consideration whether we could actually 342 * switch to the selected modes without a full modeset. E.g. when the display 343 * is in VGA mode we need to recalculate watermarks and set a new high-res 344 * framebuffer anyway. 345 */ 346 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 347 struct drm_fb_helper_crtc **crtcs, 348 struct drm_display_mode **modes, 349 bool *enabled, int width, int height) 350 { 351 struct drm_device *dev = fb_helper->dev; 352 int i, j; 353 bool *save_enabled; 354 bool fallback = true; 355 int num_connectors_enabled = 0; 356 int num_connectors_detected = 0; 357 358 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), 359 GFP_KERNEL); 360 if (!save_enabled) 361 return false; 362 363 memcpy(save_enabled, enabled, dev->mode_config.num_connector); 364 365 for (i = 0; i < fb_helper->connector_count; i++) { 366 struct drm_fb_helper_connector *fb_conn; 367 struct drm_connector *connector; 368 struct drm_encoder *encoder; 369 struct drm_fb_helper_crtc *new_crtc; 370 371 fb_conn = fb_helper->connector_info[i]; 372 connector = fb_conn->connector; 373 374 if (connector->status == connector_status_connected) 375 num_connectors_detected++; 376 377 if (!enabled[i]) { 378 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 379 connector->name); 380 continue; 381 } 382 383 if (connector->force == DRM_FORCE_OFF) { 384 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", 385 connector->name); 386 enabled[i] = false; 387 continue; 388 } 389 390 encoder = connector->encoder; 391 if (!encoder || WARN_ON(!encoder->crtc)) { 392 if (connector->force > DRM_FORCE_OFF) 393 goto bail; 394 395 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 396 connector->name); 397 enabled[i] = false; 398 continue; 399 } 400 401 num_connectors_enabled++; 402 403 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); 404 405 /* 406 * Make sure we're not trying to drive multiple connectors 407 * with a single CRTC, since our cloning support may not 408 * match the BIOS. 409 */ 410 for (j = 0; j < fb_helper->connector_count; j++) { 411 if (crtcs[j] == new_crtc) { 412 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 413 goto bail; 414 } 415 } 416 417 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 418 connector->name); 419 420 /* go for command line mode first */ 421 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 422 423 /* try for preferred next */ 424 if (!modes[i]) { 425 DRM_DEBUG_KMS("looking for preferred mode on connector %s\n", 426 connector->name); 427 modes[i] = drm_has_preferred_mode(fb_conn, width, 428 height); 429 } 430 431 /* No preferred mode marked by the EDID? Are there any modes? */ 432 if (!modes[i] && !list_empty(&connector->modes)) { 433 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 434 connector->name); 435 modes[i] = list_first_entry(&connector->modes, 436 struct drm_display_mode, 437 head); 438 } 439 440 /* last resort: use current mode */ 441 if (!modes[i]) { 442 /* 443 * IMPORTANT: We want to use the adjusted mode (i.e. 444 * after the panel fitter upscaling) as the initial 445 * config, not the input mode, which is what crtc->mode 446 * usually contains. But since our current fastboot 447 * code puts a mode derived from the post-pfit timings 448 * into crtc->mode this works out correctly. We don't 449 * use hwmode anywhere right now, so use it for this 450 * since the fb helper layer wants a pointer to 451 * something we own. 452 */ 453 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 454 connector->name); 455 intel_mode_from_pipe_config(&encoder->crtc->hwmode, 456 &to_intel_crtc(encoder->crtc)->config); 457 modes[i] = &encoder->crtc->hwmode; 458 } 459 crtcs[i] = new_crtc; 460 461 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 462 connector->name, 463 pipe_name(to_intel_crtc(encoder->crtc)->pipe), 464 encoder->crtc->base.id, 465 modes[i]->hdisplay, modes[i]->vdisplay, 466 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 467 468 fallback = false; 469 } 470 471 /* 472 * If the BIOS didn't enable everything it could, fall back to have the 473 * same user experiencing of lighting up as much as possible like the 474 * fbdev helper library. 475 */ 476 if (num_connectors_enabled != num_connectors_detected && 477 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 478 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 479 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 480 num_connectors_detected); 481 fallback = true; 482 } 483 484 if (fallback) { 485 bail: 486 DRM_DEBUG_KMS("Not using firmware configuration\n"); 487 memcpy(enabled, save_enabled, dev->mode_config.num_connector); 488 kfree(save_enabled); 489 return false; 490 } 491 492 kfree(save_enabled); 493 return true; 494 } 495 496 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 497 .initial_config = intel_fb_initial_config, 498 .gamma_set = intel_crtc_fb_gamma_set, 499 .gamma_get = intel_crtc_fb_gamma_get, 500 .fb_probe = intelfb_create, 501 }; 502 503 static void intel_fbdev_destroy(struct drm_device *dev, 504 struct intel_fbdev *ifbdev) 505 { 506 #if 0 507 if (ifbdev->helper.fbdev) { 508 struct fb_info *info = ifbdev->helper.fbdev; 509 510 unregister_framebuffer(info); 511 iounmap(info->screen_base); 512 if (info->cmap.len) 513 fb_dealloc_cmap(&info->cmap); 514 515 framebuffer_release(info); 516 } 517 #endif 518 519 drm_fb_helper_fini(&ifbdev->helper); 520 521 drm_framebuffer_unregister_private(&ifbdev->fb->base); 522 drm_framebuffer_unreference(&ifbdev->fb->base); 523 } 524 525 /* 526 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 527 * The core display code will have read out the current plane configuration, 528 * so we use that to figure out if there's an object for us to use as the 529 * fb, and if so, we re-use it for the fbdev configuration. 530 * 531 * Note we only support a single fb shared across pipes for boot (mostly for 532 * fbcon), so we just find the biggest and use that. 533 */ 534 static bool intel_fbdev_init_bios(struct drm_device *dev, 535 struct intel_fbdev *ifbdev) 536 { 537 struct intel_framebuffer *fb = NULL; 538 struct drm_crtc *crtc; 539 struct intel_crtc *intel_crtc; 540 struct intel_plane_config *plane_config = NULL; 541 unsigned int max_size = 0; 542 543 if (!i915.fastboot) 544 return false; 545 546 /* Find the largest fb */ 547 for_each_crtc(dev, crtc) { 548 intel_crtc = to_intel_crtc(crtc); 549 550 if (!intel_crtc->active || !crtc->primary->fb) { 551 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 552 pipe_name(intel_crtc->pipe)); 553 continue; 554 } 555 556 if (intel_crtc->plane_config.size > max_size) { 557 DRM_DEBUG_KMS("found possible fb from plane %c\n", 558 pipe_name(intel_crtc->pipe)); 559 plane_config = &intel_crtc->plane_config; 560 fb = to_intel_framebuffer(crtc->primary->fb); 561 max_size = plane_config->size; 562 } 563 } 564 565 if (!fb) { 566 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 567 goto out; 568 } 569 570 /* Now make sure all the pipes will fit into it */ 571 for_each_crtc(dev, crtc) { 572 unsigned int cur_size; 573 574 intel_crtc = to_intel_crtc(crtc); 575 576 if (!intel_crtc->active) { 577 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 578 pipe_name(intel_crtc->pipe)); 579 continue; 580 } 581 582 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 583 pipe_name(intel_crtc->pipe)); 584 585 /* 586 * See if the plane fb we found above will fit on this 587 * pipe. Note we need to use the selected fb's pitch and bpp 588 * rather than the current pipe's, since they differ. 589 */ 590 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay; 591 cur_size = cur_size * fb->base.bits_per_pixel / 8; 592 if (fb->base.pitches[0] < cur_size) { 593 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 594 pipe_name(intel_crtc->pipe), 595 cur_size, fb->base.pitches[0]); 596 plane_config = NULL; 597 fb = NULL; 598 break; 599 } 600 601 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay; 602 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1); 603 cur_size *= fb->base.pitches[0]; 604 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 605 pipe_name(intel_crtc->pipe), 606 intel_crtc->config.adjusted_mode.crtc_hdisplay, 607 intel_crtc->config.adjusted_mode.crtc_vdisplay, 608 fb->base.bits_per_pixel, 609 cur_size); 610 611 if (cur_size > max_size) { 612 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 613 pipe_name(intel_crtc->pipe), 614 cur_size, max_size); 615 plane_config = NULL; 616 fb = NULL; 617 break; 618 } 619 620 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 621 pipe_name(intel_crtc->pipe), 622 max_size, cur_size); 623 } 624 625 if (!fb) { 626 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 627 goto out; 628 } 629 630 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 631 ifbdev->fb = fb; 632 633 drm_framebuffer_reference(&ifbdev->fb->base); 634 635 /* Final pass to check if any active pipes don't have fbs */ 636 for_each_crtc(dev, crtc) { 637 intel_crtc = to_intel_crtc(crtc); 638 639 if (!intel_crtc->active) 640 continue; 641 642 WARN(!crtc->primary->fb, 643 "re-used BIOS config but lost an fb on crtc %d\n", 644 crtc->base.id); 645 } 646 647 648 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 649 return true; 650 651 out: 652 653 return false; 654 } 655 656 static void intel_fbdev_suspend_worker(struct work_struct *work) 657 { 658 intel_fbdev_set_suspend(container_of(work, 659 struct drm_i915_private, 660 fbdev_suspend_work)->dev, 661 FBINFO_STATE_RUNNING, 662 true); 663 } 664 665 int intel_fbdev_init(struct drm_device *dev) 666 { 667 struct intel_fbdev *ifbdev; 668 struct drm_i915_private *dev_priv = dev->dev_private; 669 int ret; 670 671 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 672 return -ENODEV; 673 674 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 675 if (ifbdev == NULL) 676 return -ENOMEM; 677 678 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 679 680 if (!intel_fbdev_init_bios(dev, ifbdev)) 681 ifbdev->preferred_bpp = 32; 682 683 ret = drm_fb_helper_init(dev, &ifbdev->helper, 684 INTEL_INFO(dev)->num_pipes, 4); 685 if (ret) { 686 kfree(ifbdev); 687 return ret; 688 } 689 690 dev_priv->fbdev = ifbdev; 691 INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); 692 693 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 694 695 return 0; 696 } 697 698 void intel_fbdev_initial_config(void *data, async_cookie_t cookie) 699 { 700 struct drm_i915_private *dev_priv = data; 701 702 /* Due to peculiar init order wrt to hpd handling this is separate. */ 703 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32); 704 } 705 706 void intel_fbdev_fini(struct drm_device *dev) 707 { 708 struct drm_i915_private *dev_priv = dev->dev_private; 709 if (!dev_priv->fbdev) 710 return; 711 712 #if 0 713 flush_work(&dev_priv->fbdev_suspend_work); 714 #endif 715 716 async_synchronize_full(); 717 intel_fbdev_destroy(dev, dev_priv->fbdev); 718 kfree(dev_priv->fbdev); 719 dev_priv->fbdev = NULL; 720 } 721 722 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) 723 { 724 #if 0 725 struct drm_i915_private *dev_priv = dev->dev_private; 726 struct intel_fbdev *ifbdev = dev_priv->fbdev; 727 struct fb_info *info; 728 729 if (!ifbdev) 730 return; 731 732 info = ifbdev->helper.fbdev; 733 734 if (synchronous) { 735 /* Flush any pending work to turn the console on, and then 736 * wait to turn it off. It must be synchronous as we are 737 * about to suspend or unload the driver. 738 * 739 * Note that from within the work-handler, we cannot flush 740 * ourselves, so only flush outstanding work upon suspend! 741 */ 742 if (state != FBINFO_STATE_RUNNING) 743 flush_work(&dev_priv->fbdev_suspend_work); 744 console_lock(); 745 } else { 746 /* 747 * The console lock can be pretty contented on resume due 748 * to all the printk activity. Try to keep it out of the hot 749 * path of resume if possible. 750 */ 751 WARN_ON(state != FBINFO_STATE_RUNNING); 752 if (!console_trylock()) { 753 /* Don't block our own workqueue as this can 754 * be run in parallel with other i915.ko tasks. 755 */ 756 schedule_work(&dev_priv->fbdev_suspend_work); 757 return; 758 } 759 } 760 761 /* On resume from hibernation: If the object is shmemfs backed, it has 762 * been restored from swap. If the object is stolen however, it will be 763 * full of whatever garbage was left in there. 764 */ 765 if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen) 766 memset_io(info->screen_base, 0, info->screen_size); 767 768 fb_set_suspend(info, state); 769 console_unlock(); 770 #endif 771 } 772 773 void intel_fbdev_output_poll_changed(struct drm_device *dev) 774 { 775 struct drm_i915_private *dev_priv = dev->dev_private; 776 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 777 } 778 779 void intel_fbdev_restore_mode(struct drm_device *dev) 780 { 781 int ret; 782 struct drm_i915_private *dev_priv = dev->dev_private; 783 784 if (INTEL_INFO(dev)->num_pipes == 0) 785 return; 786 787 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); 788 if (ret) 789 DRM_DEBUG("failed to restore crtc mode\n"); 790 } 791