sys/dev/drm/i915/intel_fbdev.c

   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 }