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/module.h> 29 #include <linux/kernel.h> 30 #include <linux/errno.h> 31 #include <linux/string.h> 32 #include <linux/mm.h> 33 #include <linux/delay.h> 34 #include <linux/fb.h> 35 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_fb_helper.h> 39 #include "intel_drv.h" 40 #include <drm/i915_drm.h> 41 #include "i915_drv.h" 42 43 #if 0 44 static int intel_fbdev_set_par(struct fb_info *info) 45 { 46 struct drm_fb_helper *fb_helper = info->par; 47 struct intel_fbdev *ifbdev = 48 container_of(fb_helper, struct intel_fbdev, helper); 49 int ret; 50 51 ret = drm_fb_helper_set_par(info); 52 53 if (ret == 0) { 54 /* 55 * FIXME: fbdev presumes that all callbacks also work from 56 * atomic contexts and relies on that for emergency oops 57 * printing. KMS totally doesn't do that and the locking here is 58 * by far not the only place this goes wrong. Ignore this for 59 * now until we solve this for real. 60 */ 61 mutex_lock(&fb_helper->dev->struct_mutex); 62 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj, 63 true); 64 mutex_unlock(&fb_helper->dev->struct_mutex); 65 } 66 67 return ret; 68 } 69 70 static struct fb_ops intelfb_ops = { 71 .owner = THIS_MODULE, 72 .fb_check_var = drm_fb_helper_check_var, 73 .fb_set_par = intel_fbdev_set_par, 74 .fb_fillrect = cfb_fillrect, 75 .fb_copyarea = cfb_copyarea, 76 .fb_imageblit = cfb_imageblit, 77 .fb_pan_display = drm_fb_helper_pan_display, 78 .fb_blank = drm_fb_helper_blank, 79 .fb_setcmap = drm_fb_helper_setcmap, 80 .fb_debug_enter = drm_fb_helper_debug_enter, 81 .fb_debug_leave = drm_fb_helper_debug_leave, 82 }; 83 #endif 84 85 static int intelfb_alloc(struct drm_fb_helper *helper, 86 struct drm_fb_helper_surface_size *sizes) 87 { 88 struct intel_fbdev *ifbdev = 89 container_of(helper, struct intel_fbdev, helper); 90 struct drm_framebuffer *fb; 91 struct drm_device *dev = helper->dev; 92 struct drm_mode_fb_cmd2 mode_cmd = {}; 93 struct drm_i915_gem_object *obj; 94 int size, ret; 95 96 /* we don't do packed 24bpp */ 97 if (sizes->surface_bpp == 24) 98 sizes->surface_bpp = 32; 99 100 mode_cmd.width = sizes->surface_width; 101 mode_cmd.height = sizes->surface_height; 102 103 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * 104 DIV_ROUND_UP(sizes->surface_bpp, 8), 64); 105 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 106 sizes->surface_depth); 107 108 size = mode_cmd.pitches[0] * mode_cmd.height; 109 size = PAGE_ALIGN(size); 110 obj = i915_gem_object_create_stolen(dev, size); 111 if (obj == NULL) 112 obj = i915_gem_alloc_object(dev, size); 113 if (!obj) { 114 DRM_ERROR("failed to allocate framebuffer\n"); 115 ret = -ENOMEM; 116 goto out; 117 } 118 119 /* Flush everything out, we'll be doing GTT only from now on */ 120 ret = intel_pin_and_fence_fb_obj(dev, obj, NULL); 121 if (ret) { 122 DRM_ERROR("failed to pin obj: %d\n", ret); 123 goto out_unref; 124 } 125 126 fb = __intel_framebuffer_create(dev, &mode_cmd, obj); 127 if (IS_ERR(fb)) { 128 ret = PTR_ERR(fb); 129 goto out_unpin; 130 } 131 132 ifbdev->fb = to_intel_framebuffer(fb); 133 134 return 0; 135 136 out_unpin: 137 i915_gem_object_ggtt_unpin(obj); 138 out_unref: 139 drm_gem_object_unreference(&obj->base); 140 out: 141 return ret; 142 } 143 144 static int intelfb_create(struct drm_fb_helper *helper, 145 struct drm_fb_helper_surface_size *sizes) 146 { 147 struct intel_fbdev *ifbdev = 148 container_of(helper, struct intel_fbdev, helper); 149 struct intel_framebuffer *intel_fb = ifbdev->fb; 150 struct drm_device *dev = helper->dev; 151 #if 0 152 struct drm_i915_private *dev_priv = dev->dev_private; 153 #endif 154 struct fb_info *info; 155 struct drm_framebuffer *fb; 156 struct drm_i915_gem_object *obj; 157 device_t vga_dev; 158 int size, ret; 159 bool prealloc = false; 160 161 mutex_lock(&dev->struct_mutex); 162 163 if (intel_fb && 164 (sizes->fb_width > intel_fb->base.width || 165 sizes->fb_height > intel_fb->base.height)) { 166 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," 167 " releasing it\n", 168 intel_fb->base.width, intel_fb->base.height, 169 sizes->fb_width, sizes->fb_height); 170 drm_framebuffer_unreference(&intel_fb->base); 171 intel_fb = ifbdev->fb = NULL; 172 } 173 if (!intel_fb || WARN_ON(!intel_fb->obj)) { 174 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); 175 ret = intelfb_alloc(helper, sizes); 176 if (ret) 177 goto out_unlock; 178 intel_fb = ifbdev->fb; 179 } else { 180 DRM_DEBUG_KMS("re-using BIOS fb\n"); 181 prealloc = true; 182 sizes->fb_width = intel_fb->base.width; 183 sizes->fb_height = intel_fb->base.height; 184 } 185 186 obj = intel_fb->obj; 187 size = obj->base.size; 188 189 #if 0 190 info = framebuffer_alloc(0, &dev->pdev->dev); 191 #else 192 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO); 193 #endif 194 if (!info) { 195 ret = -ENOMEM; 196 goto out_unpin; 197 } 198 #if 0 199 info->par = helper; 200 #endif 201 202 #ifdef __DragonFly__ 203 vga_dev = device_get_parent(dev->dev); 204 info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO); 205 info->width = sizes->fb_width; 206 info->height = sizes->fb_height; 207 info->stride = 208 ALIGN(sizes->surface_width * ((sizes->surface_bpp + 7) / 8), 64); 209 info->depth = sizes->surface_bpp; 210 info->paddr = dev->agp->base + i915_gem_obj_ggtt_offset(obj); 211 info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev); 212 info->vaddr = 213 (vm_offset_t)pmap_mapdev_attr(info->paddr, 214 sizes->surface_height * info->stride, 215 VM_MEMATTR_WRITE_COMBINING); 216 #endif 217 218 fb = &ifbdev->fb->base; 219 220 ifbdev->helper.fb = fb; 221 ifbdev->helper.fbdev = info; 222 223 #if 0 224 strcpy(info->fix.id, "inteldrmfb"); 225 226 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; 227 info->fbops = &intelfb_ops; 228 229 ret = fb_alloc_cmap(&info->cmap, 256, 0); 230 if (ret) { 231 ret = -ENOMEM; 232 goto out_unpin; 233 } 234 /* setup aperture base/size for vesafb takeover */ 235 info->apertures = alloc_apertures(1); 236 if (!info->apertures) { 237 ret = -ENOMEM; 238 goto out_unpin; 239 } 240 info->apertures->ranges[0].base = dev->mode_config.fb_base; 241 info->apertures->ranges[0].size = dev_priv->gtt.mappable_end; 242 243 info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj); 244 info->fix.smem_len = size; 245 246 info->screen_base = 247 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj), 248 size); 249 if (!info->screen_base) { 250 ret = -ENOSPC; 251 goto out_unpin; 252 } 253 info->screen_size = size; 254 255 /* This driver doesn't need a VT switch to restore the mode on resume */ 256 info->skip_vt_switch = true; 257 258 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 259 drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height); 260 261 /* If the object is shmemfs backed, it will have given us zeroed pages. 262 * If the object is stolen however, it will be full of whatever 263 * garbage was left in there. 264 */ 265 if (ifbdev->fb->obj->stolen && !prealloc) 266 memset_io(info->screen_base, 0, info->screen_size); 267 268 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 269 #endif 270 271 DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n", 272 fb->width, fb->height, 273 i915_gem_obj_ggtt_offset(obj), obj); 274 275 mutex_unlock(&dev->struct_mutex); 276 #if 0 277 vga_switcheroo_client_fb_set(dev->pdev, info); 278 #endif 279 return 0; 280 281 out_unpin: 282 i915_gem_object_ggtt_unpin(obj); 283 drm_gem_object_unreference(&obj->base); 284 out_unlock: 285 mutex_unlock(&dev->struct_mutex); 286 return ret; 287 } 288 289 /** Sets the color ramps on behalf of RandR */ 290 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 291 u16 blue, int regno) 292 { 293 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 294 295 intel_crtc->lut_r[regno] = red >> 8; 296 intel_crtc->lut_g[regno] = green >> 8; 297 intel_crtc->lut_b[regno] = blue >> 8; 298 } 299 300 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 301 u16 *blue, int regno) 302 { 303 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 304 305 *red = intel_crtc->lut_r[regno] << 8; 306 *green = intel_crtc->lut_g[regno] << 8; 307 *blue = intel_crtc->lut_b[regno] << 8; 308 } 309 310 static struct drm_fb_helper_crtc * 311 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) 312 { 313 int i; 314 315 for (i = 0; i < fb_helper->crtc_count; i++) 316 if (fb_helper->crtc_info[i].mode_set.crtc == crtc) 317 return &fb_helper->crtc_info[i]; 318 319 return NULL; 320 } 321 322 /* 323 * Try to read the BIOS display configuration and use it for the initial 324 * fb configuration. 325 * 326 * The BIOS or boot loader will generally create an initial display 327 * configuration for us that includes some set of active pipes and displays. 328 * This routine tries to figure out which pipes and connectors are active 329 * and stuffs them into the crtcs and modes array given to us by the 330 * drm_fb_helper code. 331 * 332 * The overall sequence is: 333 * intel_fbdev_init - from driver load 334 * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data 335 * drm_fb_helper_init - build fb helper structs 336 * drm_fb_helper_single_add_all_connectors - more fb helper structs 337 * intel_fbdev_initial_config - apply the config 338 * drm_fb_helper_initial_config - call ->probe then register_framebuffer() 339 * drm_setup_crtcs - build crtc config for fbdev 340 * intel_fb_initial_config - find active connectors etc 341 * drm_fb_helper_single_fb_probe - set up fbdev 342 * intelfb_create - re-use or alloc fb, build out fbdev structs 343 * 344 * Note that we don't make special consideration whether we could actually 345 * switch to the selected modes without a full modeset. E.g. when the display 346 * is in VGA mode we need to recalculate watermarks and set a new high-res 347 * framebuffer anyway. 348 */ 349 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, 350 struct drm_fb_helper_crtc **crtcs, 351 struct drm_display_mode **modes, 352 bool *enabled, int width, int height) 353 { 354 struct drm_device *dev = fb_helper->dev; 355 int i, j; 356 bool *save_enabled; 357 bool fallback = true; 358 int num_connectors_enabled = 0; 359 int num_connectors_detected = 0; 360 361 /* 362 * If the user specified any force options, just bail here 363 * and use that config. 364 */ 365 for (i = 0; i < fb_helper->connector_count; i++) { 366 struct drm_fb_helper_connector *fb_conn; 367 struct drm_connector *connector; 368 369 fb_conn = fb_helper->connector_info[i]; 370 connector = fb_conn->connector; 371 372 if (!enabled[i]) 373 continue; 374 375 if (connector->force != DRM_FORCE_UNSPECIFIED) 376 return false; 377 } 378 379 save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), 380 GFP_KERNEL); 381 if (!save_enabled) 382 return false; 383 384 memcpy(save_enabled, enabled, dev->mode_config.num_connector); 385 386 for (i = 0; i < fb_helper->connector_count; i++) { 387 struct drm_fb_helper_connector *fb_conn; 388 struct drm_connector *connector; 389 struct drm_encoder *encoder; 390 struct drm_fb_helper_crtc *new_crtc; 391 392 fb_conn = fb_helper->connector_info[i]; 393 connector = fb_conn->connector; 394 395 if (connector->status == connector_status_connected) 396 num_connectors_detected++; 397 398 if (!enabled[i]) { 399 DRM_DEBUG_KMS("connector %s not enabled, skipping\n", 400 connector->name); 401 continue; 402 } 403 404 encoder = connector->encoder; 405 if (!encoder || WARN_ON(!encoder->crtc)) { 406 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", 407 connector->name); 408 enabled[i] = false; 409 continue; 410 } 411 412 num_connectors_enabled++; 413 414 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc); 415 416 /* 417 * Make sure we're not trying to drive multiple connectors 418 * with a single CRTC, since our cloning support may not 419 * match the BIOS. 420 */ 421 for (j = 0; j < fb_helper->connector_count; j++) { 422 if (crtcs[j] == new_crtc) { 423 DRM_DEBUG_KMS("fallback: cloned configuration\n"); 424 fallback = true; 425 goto out; 426 } 427 } 428 429 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", 430 connector->name); 431 432 /* go for command line mode first */ 433 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height); 434 435 /* try for preferred next */ 436 if (!modes[i]) { 437 DRM_DEBUG_KMS("looking for preferred mode on connector %s\n", 438 connector->name); 439 modes[i] = drm_has_preferred_mode(fb_conn, width, 440 height); 441 } 442 443 /* No preferred mode marked by the EDID? Are there any modes? */ 444 if (!modes[i] && !list_empty(&connector->modes)) { 445 DRM_DEBUG_KMS("using first mode listed on connector %s\n", 446 connector->name); 447 modes[i] = list_first_entry(&connector->modes, 448 struct drm_display_mode, 449 head); 450 } 451 452 /* last resort: use current mode */ 453 if (!modes[i]) { 454 /* 455 * IMPORTANT: We want to use the adjusted mode (i.e. 456 * after the panel fitter upscaling) as the initial 457 * config, not the input mode, which is what crtc->mode 458 * usually contains. But since our current fastboot 459 * code puts a mode derived from the post-pfit timings 460 * into crtc->mode this works out correctly. We don't 461 * use hwmode anywhere right now, so use it for this 462 * since the fb helper layer wants a pointer to 463 * something we own. 464 */ 465 DRM_DEBUG_KMS("looking for current mode on connector %s\n", 466 connector->name); 467 intel_mode_from_pipe_config(&encoder->crtc->hwmode, 468 &to_intel_crtc(encoder->crtc)->config); 469 modes[i] = &encoder->crtc->hwmode; 470 } 471 crtcs[i] = new_crtc; 472 473 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n", 474 connector->name, 475 pipe_name(to_intel_crtc(encoder->crtc)->pipe), 476 encoder->crtc->base.id, 477 modes[i]->hdisplay, modes[i]->vdisplay, 478 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); 479 480 fallback = false; 481 } 482 483 /* 484 * If the BIOS didn't enable everything it could, fall back to have the 485 * same user experiencing of lighting up as much as possible like the 486 * fbdev helper library. 487 */ 488 if (num_connectors_enabled != num_connectors_detected && 489 num_connectors_enabled < INTEL_INFO(dev)->num_pipes) { 490 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); 491 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, 492 num_connectors_detected); 493 fallback = true; 494 } 495 496 out: 497 if (fallback) { 498 DRM_DEBUG_KMS("Not using firmware configuration\n"); 499 memcpy(enabled, save_enabled, dev->mode_config.num_connector); 500 kfree(save_enabled); 501 return false; 502 } 503 504 kfree(save_enabled); 505 return true; 506 } 507 508 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { 509 .initial_config = intel_fb_initial_config, 510 .gamma_set = intel_crtc_fb_gamma_set, 511 .gamma_get = intel_crtc_fb_gamma_get, 512 .fb_probe = intelfb_create, 513 }; 514 515 static void intel_fbdev_destroy(struct drm_device *dev, 516 struct intel_fbdev *ifbdev) 517 { 518 #if 0 519 if (ifbdev->helper.fbdev) { 520 struct fb_info *info = ifbdev->helper.fbdev; 521 522 unregister_framebuffer(info); 523 iounmap(info->screen_base); 524 if (info->cmap.len) 525 fb_dealloc_cmap(&info->cmap); 526 527 framebuffer_release(info); 528 } 529 #endif 530 531 drm_fb_helper_fini(&ifbdev->helper); 532 533 drm_framebuffer_unregister_private(&ifbdev->fb->base); 534 drm_framebuffer_unreference(&ifbdev->fb->base); 535 } 536 537 /* 538 * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible. 539 * The core display code will have read out the current plane configuration, 540 * so we use that to figure out if there's an object for us to use as the 541 * fb, and if so, we re-use it for the fbdev configuration. 542 * 543 * Note we only support a single fb shared across pipes for boot (mostly for 544 * fbcon), so we just find the biggest and use that. 545 */ 546 static bool intel_fbdev_init_bios(struct drm_device *dev, 547 struct intel_fbdev *ifbdev) 548 { 549 struct intel_framebuffer *fb = NULL; 550 struct drm_crtc *crtc; 551 struct intel_crtc *intel_crtc; 552 struct intel_plane_config *plane_config = NULL; 553 unsigned int max_size = 0; 554 555 if (!i915.fastboot) 556 return false; 557 558 /* Find the largest fb */ 559 for_each_crtc(dev, crtc) { 560 intel_crtc = to_intel_crtc(crtc); 561 562 if (!intel_crtc->active || !crtc->primary->fb) { 563 DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n", 564 pipe_name(intel_crtc->pipe)); 565 continue; 566 } 567 568 if (intel_crtc->plane_config.size > max_size) { 569 DRM_DEBUG_KMS("found possible fb from plane %c\n", 570 pipe_name(intel_crtc->pipe)); 571 plane_config = &intel_crtc->plane_config; 572 fb = to_intel_framebuffer(crtc->primary->fb); 573 max_size = plane_config->size; 574 } 575 } 576 577 if (!fb) { 578 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n"); 579 goto out; 580 } 581 582 /* Now make sure all the pipes will fit into it */ 583 for_each_crtc(dev, crtc) { 584 unsigned int cur_size; 585 586 intel_crtc = to_intel_crtc(crtc); 587 588 if (!intel_crtc->active) { 589 DRM_DEBUG_KMS("pipe %c not active, skipping\n", 590 pipe_name(intel_crtc->pipe)); 591 continue; 592 } 593 594 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n", 595 pipe_name(intel_crtc->pipe)); 596 597 /* 598 * See if the plane fb we found above will fit on this 599 * pipe. Note we need to use the selected fb's pitch and bpp 600 * rather than the current pipe's, since they differ. 601 */ 602 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay; 603 cur_size = cur_size * fb->base.bits_per_pixel / 8; 604 if (fb->base.pitches[0] < cur_size) { 605 DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n", 606 pipe_name(intel_crtc->pipe), 607 cur_size, fb->base.pitches[0]); 608 plane_config = NULL; 609 fb = NULL; 610 break; 611 } 612 613 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay; 614 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1); 615 cur_size *= fb->base.pitches[0]; 616 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n", 617 pipe_name(intel_crtc->pipe), 618 intel_crtc->config.adjusted_mode.crtc_hdisplay, 619 intel_crtc->config.adjusted_mode.crtc_vdisplay, 620 fb->base.bits_per_pixel, 621 cur_size); 622 623 if (cur_size > max_size) { 624 DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n", 625 pipe_name(intel_crtc->pipe), 626 cur_size, max_size); 627 plane_config = NULL; 628 fb = NULL; 629 break; 630 } 631 632 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n", 633 pipe_name(intel_crtc->pipe), 634 max_size, cur_size); 635 } 636 637 if (!fb) { 638 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n"); 639 goto out; 640 } 641 642 ifbdev->preferred_bpp = fb->base.bits_per_pixel; 643 ifbdev->fb = fb; 644 645 drm_framebuffer_reference(&ifbdev->fb->base); 646 647 /* Final pass to check if any active pipes don't have fbs */ 648 for_each_crtc(dev, crtc) { 649 intel_crtc = to_intel_crtc(crtc); 650 651 if (!intel_crtc->active) 652 continue; 653 654 WARN(!crtc->primary->fb, 655 "re-used BIOS config but lost an fb on crtc %d\n", 656 crtc->base.id); 657 } 658 659 660 DRM_DEBUG_KMS("using BIOS fb for initial console\n"); 661 return true; 662 663 out: 664 665 return false; 666 } 667 668 int intel_fbdev_init(struct drm_device *dev) 669 { 670 struct intel_fbdev *ifbdev; 671 struct drm_i915_private *dev_priv = dev->dev_private; 672 int ret; 673 674 if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0)) 675 return -ENODEV; 676 677 ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL); 678 if (ifbdev == NULL) 679 return -ENOMEM; 680 681 drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs); 682 683 if (!intel_fbdev_init_bios(dev, ifbdev)) 684 ifbdev->preferred_bpp = 32; 685 686 ret = drm_fb_helper_init(dev, &ifbdev->helper, 687 INTEL_INFO(dev)->num_pipes, 4); 688 if (ret) { 689 kfree(ifbdev); 690 return ret; 691 } 692 693 dev_priv->fbdev = ifbdev; 694 drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 695 696 return 0; 697 } 698 699 void intel_fbdev_initial_config(struct drm_device *dev) 700 { 701 struct drm_i915_private *dev_priv = dev->dev_private; 702 703 /* Due to peculiar init order wrt to hpd handling this is separate. */ 704 drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32); 705 } 706 707 void intel_fbdev_fini(struct drm_device *dev) 708 { 709 struct drm_i915_private *dev_priv = dev->dev_private; 710 if (!dev_priv->fbdev) 711 return; 712 713 intel_fbdev_destroy(dev, dev_priv->fbdev); 714 kfree(dev_priv->fbdev); 715 dev_priv->fbdev = NULL; 716 } 717 718 void intel_fbdev_set_suspend(struct drm_device *dev, int state) 719 { 720 #if 0 721 struct drm_i915_private *dev_priv = dev->dev_private; 722 struct intel_fbdev *ifbdev = dev_priv->fbdev; 723 struct fb_info *info; 724 725 if (!ifbdev) 726 return; 727 728 info = ifbdev->helper.fbdev; 729 730 /* On resume from hibernation: If the object is shmemfs backed, it has 731 * been restored from swap. If the object is stolen however, it will be 732 * full of whatever garbage was left in there. 733 */ 734 if (state == FBINFO_STATE_RUNNING && ifbdev->ifb.obj->stolen) 735 memset_io(info->screen_base, 0, info->screen_size); 736 737 fb_set_suspend(info, state); 738 #endif 739 } 740 741 void intel_fbdev_output_poll_changed(struct drm_device *dev) 742 { 743 struct drm_i915_private *dev_priv = dev->dev_private; 744 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper); 745 } 746 747 void intel_fbdev_restore_mode(struct drm_device *dev) 748 { 749 int ret; 750 struct drm_i915_private *dev_priv = dev->dev_private; 751 752 if (INTEL_INFO(dev)->num_pipes == 0) 753 return; 754 755 ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); 756 if (ret) 757 DRM_DEBUG("failed to restore crtc mode\n"); 758 } 759