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