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