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/async.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/errno.h>
  32 #include <linux/string.h>
  33 #include <linux/mm.h>
  34 #include <linux/delay.h>
  35 #include <linux/fb.h>
  36
  37 #include <drm/drmP.h>
  38 #include <drm/drm_crtc.h>
  39 #include <drm/drm_fb_helper.h>
  40 #include "intel_drv.h"
  41 #include <drm/i915_drm.h>
  42 #include "i915_drv.h"
  43
  44 #if 0
  45 static int intel_fbdev_set_par(struct fb_info *info)
  46 {
  47         struct drm_fb_helper *fb_helper = info->par;
  48         struct intel_fbdev *ifbdev =
  49                 container_of(fb_helper, struct intel_fbdev, helper);
  50         int ret;
  51
  52         ret = drm_fb_helper_set_par(info);
  53
  54         if (ret == 0) {
  55                 /*
  56                  * FIXME: fbdev presumes that all callbacks also work from
  57                  * atomic contexts and relies on that for emergency oops
  58                  * printing. KMS totally doesn't do that and the locking here is
  59                  * by far not the only place this goes wrong.  Ignore this for
  60                  * now until we solve this for real.
  61                  */
  62                 mutex_lock(&fb_helper->dev->struct_mutex);
  63                 ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
  64                                                         true);
  65                 mutex_unlock(&fb_helper->dev->struct_mutex);
  66         }
  67
  68         return ret;
  69 }
  70
  71 static struct fb_ops intelfb_ops = {
  72         .owner = THIS_MODULE,
  73         .fb_check_var = drm_fb_helper_check_var,
  74         .fb_set_par = intel_fbdev_set_par,
  75         .fb_fillrect = cfb_fillrect,
  76         .fb_copyarea = cfb_copyarea,
  77         .fb_imageblit = cfb_imageblit,
  78         .fb_pan_display = drm_fb_helper_pan_display,
  79         .fb_blank = drm_fb_helper_blank,
  80         .fb_setcmap = drm_fb_helper_setcmap,
  81         .fb_debug_enter = drm_fb_helper_debug_enter,
  82         .fb_debug_leave = drm_fb_helper_debug_leave,
  83 };
  84 #endif
  85
  86 static int intelfb_alloc(struct drm_fb_helper *helper,
  87                          struct drm_fb_helper_surface_size *sizes)
  88 {
  89         struct intel_fbdev *ifbdev =
  90                 container_of(helper, struct intel_fbdev, helper);
  91         struct drm_framebuffer *fb;
  92         struct drm_device *dev = helper->dev;
  93         struct drm_mode_fb_cmd2 mode_cmd = {};
  94         struct drm_i915_gem_object *obj;
  95         int size, ret;
  96
  97         /* we don't do packed 24bpp */
  98         if (sizes->surface_bpp == 24)
  99                 sizes->surface_bpp = 32;
 100
 101         mode_cmd.width = sizes->surface_width;
 102         mode_cmd.height = sizes->surface_height;
 103
 104         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 105                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 106         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 107                                                           sizes->surface_depth);
 108
 109         size = mode_cmd.pitches[0] * mode_cmd.height;
 110         size = PAGE_ALIGN(size);
 111         obj = i915_gem_object_create_stolen(dev, size);
 112         if (obj == NULL)
 113                 obj = i915_gem_alloc_object(dev, size);
 114         if (!obj) {
 115                 DRM_ERROR("failed to allocate framebuffer\n");
 116                 ret = -ENOMEM;
 117                 goto out;
 118         }
 119
 120         /* Flush everything out, we'll be doing GTT only from now on */
 121         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
 122         if (ret) {
 123                 DRM_ERROR("failed to pin obj: %d\n", ret);
 124                 goto out_unref;
 125         }
 126
 127         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 128         if (IS_ERR(fb)) {
 129                 ret = PTR_ERR(fb);
 130                 goto out_unpin;
 131         }
 132
 133         ifbdev->fb = to_intel_framebuffer(fb);
 134
 135         return 0;
 136
 137 out_unpin:
 138         i915_gem_object_ggtt_unpin(obj);
 139 out_unref:
 140         drm_gem_object_unreference(&obj->base);
 141 out:
 142         return ret;
 143 }
 144
 145 static int intelfb_create(struct drm_fb_helper *helper,
 146                           struct drm_fb_helper_surface_size *sizes)
 147 {
 148         struct intel_fbdev *ifbdev =
 149                 container_of(helper, struct intel_fbdev, helper);
 150         struct intel_framebuffer *intel_fb = ifbdev->fb;
 151         struct drm_device *dev = helper->dev;
 152         struct drm_i915_private *dev_priv = dev->dev_private;
 153         struct fb_info *info;
 154         struct drm_framebuffer *fb;
 155         struct drm_i915_gem_object *obj;
 156         device_t vga_dev;
 157         int size, ret;
 158         bool prealloc = false;
 159
 160         mutex_lock(&dev->struct_mutex);
 161
 162         if (intel_fb &&
 163             (sizes->fb_width > intel_fb->base.width ||
 164              sizes->fb_height > intel_fb->base.height)) {
 165                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 166                               " releasing it\n",
 167                               intel_fb->base.width, intel_fb->base.height,
 168                               sizes->fb_width, sizes->fb_height);
 169                 drm_framebuffer_unreference(&intel_fb->base);
 170                 intel_fb = ifbdev->fb = NULL;
 171         }
 172         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 173                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 174                 ret = intelfb_alloc(helper, sizes);
 175                 if (ret)
 176                         goto out_unlock;
 177                 intel_fb = ifbdev->fb;
 178         } else {
 179                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 180                 prealloc = true;
 181                 sizes->fb_width = intel_fb->base.width;
 182                 sizes->fb_height = intel_fb->base.height;
 183         }
 184
 185         obj = intel_fb->obj;
 186         size = obj->base.size;
 187
 188 #if 0
 189         info = framebuffer_alloc(0, &dev->pdev->dev);
 190 #else
 191         info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO);
 192 #endif
 193         if (!info) {
 194                 ret = -ENOMEM;
 195                 goto out_unpin;
 196         }
 197 #if 0
 198         info->par = helper;
 199 #endif
 200
 201 #ifdef __DragonFly__
 202         vga_dev = device_get_parent(dev->dev);
 203         info = kmalloc(sizeof(struct fb_info), M_DRM, M_WAITOK | M_ZERO);
 204         info->width = sizes->fb_width;
 205         info->height = sizes->fb_height;
 206         info->stride =
 207             ALIGN(sizes->surface_width * ((sizes->surface_bpp + 7) / 8), 64);
 208         info->depth = sizes->surface_bpp;
 209         info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
 210         info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
 211         info->vaddr =
 212             (vm_offset_t)pmap_mapdev_attr(info->paddr,
 213                 sizes->surface_height * info->stride,
 214                 VM_MEMATTR_WRITE_COMBINING);
 215 #endif
 216
 217         fb = &ifbdev->fb->base;
 218
 219         ifbdev->helper.fb = fb;
 220         ifbdev->helper.fbdev = info;
 221
 222 #if 0
 223         strcpy(info->fix.id, "inteldrmfb");
 224
 225         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 226         info->fbops = &intelfb_ops;
 227
 228         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 229         if (ret) {
 230                 ret = -ENOMEM;
 231                 goto out_unpin;
 232         }
 233         /* setup aperture base/size for vesafb takeover */
 234         info->apertures = alloc_apertures(1);
 235         if (!info->apertures) {
 236                 ret = -ENOMEM;
 237                 goto out_unpin;
 238         }
 239         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 240         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 241
 242         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 243         info->fix.smem_len = size;
 244
 245         info->screen_base =
 246                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 247                            size);
 248         if (!info->screen_base) {
 249                 ret = -ENOSPC;
 250                 goto out_unpin;
 251         }
 252         info->screen_size = size;
 253
 254         /* This driver doesn't need a VT switch to restore the mode on resume */
 255         info->skip_vt_switch = true;
 256
 257         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 258         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 259
 260         /* If the object is shmemfs backed, it will have given us zeroed pages.
 261          * If the object is stolen however, it will be full of whatever
 262          * garbage was left in there.
 263          */
 264         if (ifbdev->fb->obj->stolen && !prealloc)
 265                 memset_io(info->screen_base, 0, info->screen_size);
 266
 267         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 268 #endif
 269
 270         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 271                       fb->width, fb->height,
 272                       i915_gem_obj_ggtt_offset(obj), obj);
 273
 274         mutex_unlock(&dev->struct_mutex);
 275 #if 0
 276         vga_switcheroo_client_fb_set(dev->pdev, info);
 277 #endif
 278         return 0;
 279
 280 out_unpin:
 281         i915_gem_object_ggtt_unpin(obj);
 282         drm_gem_object_unreference(&obj->base);
 283 out_unlock:
 284         mutex_unlock(&dev->struct_mutex);
 285         return ret;
 286 }
 287
 288 /** Sets the color ramps on behalf of RandR */
 289 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 290                                     u16 blue, int regno)
 291 {
 292         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 293
 294         intel_crtc->lut_r[regno] = red >> 8;
 295         intel_crtc->lut_g[regno] = green >> 8;
 296         intel_crtc->lut_b[regno] = blue >> 8;
 297 }
 298
 299 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 300                                     u16 *blue, int regno)
 301 {
 302         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 303
 304         *red = intel_crtc->lut_r[regno] << 8;
 305         *green = intel_crtc->lut_g[regno] << 8;
 306         *blue = intel_crtc->lut_b[regno] << 8;
 307 }
 308
 309 static struct drm_fb_helper_crtc *
 310 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 311 {
 312         int i;
 313
 314         for (i = 0; i < fb_helper->crtc_count; i++)
 315                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 316                         return &fb_helper->crtc_info[i];
 317
 318         return NULL;
 319 }
 320
 321 /*
 322  * Try to read the BIOS display configuration and use it for the initial
 323  * fb configuration.
 324  *
 325  * The BIOS or boot loader will generally create an initial display
 326  * configuration for us that includes some set of active pipes and displays.
 327  * This routine tries to figure out which pipes and connectors are active
 328  * and stuffs them into the crtcs and modes array given to us by the
 329  * drm_fb_helper code.
 330  *
 331  * The overall sequence is:
 332  *   intel_fbdev_init - from driver load
 333  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 334  *     drm_fb_helper_init - build fb helper structs
 335  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 336  *   intel_fbdev_initial_config - apply the config
 337  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 338  *         drm_setup_crtcs - build crtc config for fbdev
 339  *           intel_fb_initial_config - find active connectors etc
 340  *         drm_fb_helper_single_fb_probe - set up fbdev
 341  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 342  *
 343  * Note that we don't make special consideration whether we could actually
 344  * switch to the selected modes without a full modeset. E.g. when the display
 345  * is in VGA mode we need to recalculate watermarks and set a new high-res
 346  * framebuffer anyway.
 347  */
 348 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 349                                     struct drm_fb_helper_crtc **crtcs,
 350                                     struct drm_display_mode **modes,
 351                                     bool *enabled, int width, int height)
 352 {
 353         struct drm_device *dev = fb_helper->dev;
 354         int i, j;
 355         bool *save_enabled;
 356         bool fallback = true;
 357         int num_connectors_enabled = 0;
 358         int num_connectors_detected = 0;
 359
 360         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 361                                GFP_KERNEL);
 362         if (!save_enabled)
 363                 return false;
 364
 365         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 366
 367         for (i = 0; i < fb_helper->connector_count; i++) {
 368                 struct drm_fb_helper_connector *fb_conn;
 369                 struct drm_connector *connector;
 370                 struct drm_encoder *encoder;
 371                 struct drm_fb_helper_crtc *new_crtc;
 372
 373                 fb_conn = fb_helper->connector_info[i];
 374                 connector = fb_conn->connector;
 375
 376                 if (connector->status == connector_status_connected)
 377                         num_connectors_detected++;
 378
 379                 if (!enabled[i]) {
 380                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 381                                       connector->name);
 382                         continue;
 383                 }
 384
 385                 if (connector->force == DRM_FORCE_OFF) {
 386                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 387                                       connector->name);
 388                         enabled[i] = false;
 389                         continue;
 390                 }
 391
 392                 encoder = connector->encoder;
 393                 if (!encoder || WARN_ON(!encoder->crtc)) {
 394                         if (connector->force > DRM_FORCE_OFF)
 395                                 goto bail;
 396
 397                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 398                                       connector->name);
 399                         enabled[i] = false;
 400                         continue;
 401                 }
 402
 403                 num_connectors_enabled++;
 404
 405                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 406
 407                 /*
 408                  * Make sure we're not trying to drive multiple connectors
 409                  * with a single CRTC, since our cloning support may not
 410                  * match the BIOS.
 411                  */
 412                 for (j = 0; j < fb_helper->connector_count; j++) {
 413                         if (crtcs[j] == new_crtc) {
 414                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 415                                 goto bail;
 416                         }
 417                 }
 418
 419                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 420                               connector->name);
 421
 422                 /* go for command line mode first */
 423                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 424
 425                 /* try for preferred next */
 426                 if (!modes[i]) {
 427                         DRM_DEBUG_KMS("looking for preferred mode on connector %s\n",
 428                                       connector->name);
 429                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 430                                                           height);
 431                 }
 432
 433                 /* No preferred mode marked by the EDID? Are there any modes? */
 434                 if (!modes[i] && !list_empty(&connector->modes)) {
 435                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 436                                       connector->name);
 437                         modes[i] = list_first_entry(&connector->modes,
 438                                                     struct drm_display_mode,
 439                                                     head);
 440                 }
 441
 442                 /* last resort: use current mode */
 443                 if (!modes[i]) {
 444                         /*
 445                          * IMPORTANT: We want to use the adjusted mode (i.e.
 446                          * after the panel fitter upscaling) as the initial
 447                          * config, not the input mode, which is what crtc->mode
 448                          * usually contains. But since our current fastboot
 449                          * code puts a mode derived from the post-pfit timings
 450                          * into crtc->mode this works out correctly. We don't
 451                          * use hwmode anywhere right now, so use it for this
 452                          * since the fb helper layer wants a pointer to
 453                          * something we own.
 454                          */
 455                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 456                                       connector->name);
 457                         intel_mode_from_pipe_config(&encoder->crtc->hwmode,
 458                                                     &to_intel_crtc(encoder->crtc)->config);
 459                         modes[i] = &encoder->crtc->hwmode;
 460                 }
 461                 crtcs[i] = new_crtc;
 462
 463                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 464                               connector->name,
 465                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 466                               encoder->crtc->base.id,
 467                               modes[i]->hdisplay, modes[i]->vdisplay,
 468                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 469
 470                 fallback = false;
 471         }
 472
 473         /*
 474          * If the BIOS didn't enable everything it could, fall back to have the
 475          * same user experiencing of lighting up as much as possible like the
 476          * fbdev helper library.
 477          */
 478         if (num_connectors_enabled != num_connectors_detected &&
 479             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 480                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 481                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 482                               num_connectors_detected);
 483                 fallback = true;
 484         }
 485
 486         if (fallback) {
 487 bail:
 488                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 489                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 490                 kfree(save_enabled);
 491                 return false;
 492         }
 493
 494         kfree(save_enabled);
 495         return true;
 496 }
 497
 498 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 499         .initial_config = intel_fb_initial_config,
 500         .gamma_set = intel_crtc_fb_gamma_set,
 501         .gamma_get = intel_crtc_fb_gamma_get,
 502         .fb_probe = intelfb_create,
 503 };
 504
 505 static void intel_fbdev_destroy(struct drm_device *dev,
 506                                 struct intel_fbdev *ifbdev)
 507 {
 508 #if 0
 509         if (ifbdev->helper.fbdev) {
 510                 struct fb_info *info = ifbdev->helper.fbdev;
 511
 512                 unregister_framebuffer(info);
 513                 iounmap(info->screen_base);
 514                 if (info->cmap.len)
 515                         fb_dealloc_cmap(&info->cmap);
 516
 517                 framebuffer_release(info);
 518         }
 519 #endif
 520
 521         drm_fb_helper_fini(&ifbdev->helper);
 522
 523         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 524         drm_framebuffer_unreference(&ifbdev->fb->base);
 525 }
 526
 527 /*
 528  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 529  * The core display code will have read out the current plane configuration,
 530  * so we use that to figure out if there's an object for us to use as the
 531  * fb, and if so, we re-use it for the fbdev configuration.
 532  *
 533  * Note we only support a single fb shared across pipes for boot (mostly for
 534  * fbcon), so we just find the biggest and use that.
 535  */
 536 static bool intel_fbdev_init_bios(struct drm_device *dev,
 537                                  struct intel_fbdev *ifbdev)
 538 {
 539         struct intel_framebuffer *fb = NULL;
 540         struct drm_crtc *crtc;
 541         struct intel_crtc *intel_crtc;
 542         struct intel_plane_config *plane_config = NULL;
 543         unsigned int max_size = 0;
 544
 545         if (!i915.fastboot)
 546                 return false;
 547
 548         /* Find the largest fb */
 549         for_each_crtc(dev, crtc) {
 550                 intel_crtc = to_intel_crtc(crtc);
 551
 552                 if (!intel_crtc->active || !crtc->primary->fb) {
 553                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 554                                       pipe_name(intel_crtc->pipe));
 555                         continue;
 556                 }
 557
 558                 if (intel_crtc->plane_config.size > max_size) {
 559                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 560                                       pipe_name(intel_crtc->pipe));
 561                         plane_config = &intel_crtc->plane_config;
 562                         fb = to_intel_framebuffer(crtc->primary->fb);
 563                         max_size = plane_config->size;
 564                 }
 565         }
 566
 567         if (!fb) {
 568                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 569                 goto out;
 570         }
 571
 572         /* Now make sure all the pipes will fit into it */
 573         for_each_crtc(dev, crtc) {
 574                 unsigned int cur_size;
 575
 576                 intel_crtc = to_intel_crtc(crtc);
 577
 578                 if (!intel_crtc->active) {
 579                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 580                                       pipe_name(intel_crtc->pipe));
 581                         continue;
 582                 }
 583
 584                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 585                               pipe_name(intel_crtc->pipe));
 586
 587                 /*
 588                  * See if the plane fb we found above will fit on this
 589                  * pipe.  Note we need to use the selected fb's pitch and bpp
 590                  * rather than the current pipe's, since they differ.
 591                  */
 592                 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
 593                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 594                 if (fb->base.pitches[0] < cur_size) {
 595                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 596                                       pipe_name(intel_crtc->pipe),
 597                                       cur_size, fb->base.pitches[0]);
 598                         plane_config = NULL;
 599                         fb = NULL;
 600                         break;
 601                 }
 602
 603                 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
 604                 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
 605                 cur_size *= fb->base.pitches[0];
 606                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 607                               pipe_name(intel_crtc->pipe),
 608                               intel_crtc->config.adjusted_mode.crtc_hdisplay,
 609                               intel_crtc->config.adjusted_mode.crtc_vdisplay,
 610                               fb->base.bits_per_pixel,
 611                               cur_size);
 612
 613                 if (cur_size > max_size) {
 614                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 615                                       pipe_name(intel_crtc->pipe),
 616                                       cur_size, max_size);
 617                         plane_config = NULL;
 618                         fb = NULL;
 619                         break;
 620                 }
 621
 622                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 623                               pipe_name(intel_crtc->pipe),
 624                               max_size, cur_size);
 625         }
 626
 627         if (!fb) {
 628                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 629                 goto out;
 630         }
 631
 632         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 633         ifbdev->fb = fb;
 634
 635         drm_framebuffer_reference(&ifbdev->fb->base);
 636
 637         /* Final pass to check if any active pipes don't have fbs */
 638         for_each_crtc(dev, crtc) {
 639                 intel_crtc = to_intel_crtc(crtc);
 640
 641                 if (!intel_crtc->active)
 642                         continue;
 643
 644                 WARN(!crtc->primary->fb,
 645                      "re-used BIOS config but lost an fb on crtc %d\n",
 646                      crtc->base.id);
 647         }
 648
 649
 650         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 651         return true;
 652
 653 out:
 654
 655         return false;
 656 }
 657
 658 static void intel_fbdev_suspend_worker(struct work_struct *work)
 659 {
 660         intel_fbdev_set_suspend(container_of(work,
 661                                              struct drm_i915_private,
 662                                              fbdev_suspend_work)->dev,
 663                                 FBINFO_STATE_RUNNING,
 664                                 true);
 665 }
 666
 667 int intel_fbdev_init(struct drm_device *dev)
 668 {
 669         struct intel_fbdev *ifbdev;
 670         struct drm_i915_private *dev_priv = dev->dev_private;
 671         int ret;
 672
 673         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 674                 return -ENODEV;
 675
 676         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 677         if (ifbdev == NULL)
 678                 return -ENOMEM;
 679
 680         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 681
 682         if (!intel_fbdev_init_bios(dev, ifbdev))
 683                 ifbdev->preferred_bpp = 32;
 684
 685         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 686                                  INTEL_INFO(dev)->num_pipes, 4);
 687         if (ret) {
 688                 kfree(ifbdev);
 689                 return ret;
 690         }
 691
 692         dev_priv->fbdev = ifbdev;
 693         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 694
 695         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 696
 697         return 0;
 698 }
 699
 700 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 701 {
 702         struct drm_i915_private *dev_priv = data;
 703
 704         /* Due to peculiar init order wrt to hpd handling this is separate. */
 705         drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
 706 }
 707
 708 void intel_fbdev_fini(struct drm_device *dev)
 709 {
 710         struct drm_i915_private *dev_priv = dev->dev_private;
 711         if (!dev_priv->fbdev)
 712                 return;
 713
 714 #if 0
 715         flush_work(&dev_priv->fbdev_suspend_work);
 716 #endif
 717
 718         async_synchronize_full();
 719         intel_fbdev_destroy(dev, dev_priv->fbdev);
 720         kfree(dev_priv->fbdev);
 721         dev_priv->fbdev = NULL;
 722 }
 723
 724 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 725 {
 726 #if 0
 727         struct drm_i915_private *dev_priv = dev->dev_private;
 728         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 729         struct fb_info *info;
 730
 731         if (!ifbdev)
 732                 return;
 733
 734         info = ifbdev->helper.fbdev;
 735
 736         if (synchronous) {
 737                 /* Flush any pending work to turn the console on, and then
 738                  * wait to turn it off. It must be synchronous as we are
 739                  * about to suspend or unload the driver.
 740                  *
 741                  * Note that from within the work-handler, we cannot flush
 742                  * ourselves, so only flush outstanding work upon suspend!
 743                  */
 744                 if (state != FBINFO_STATE_RUNNING)
 745                         flush_work(&dev_priv->fbdev_suspend_work);
 746                 console_lock();
 747         } else {
 748                 /*
 749                  * The console lock can be pretty contented on resume due
 750                  * to all the printk activity.  Try to keep it out of the hot
 751                  * path of resume if possible.
 752                  */
 753                 WARN_ON(state != FBINFO_STATE_RUNNING);
 754                 if (!console_trylock()) {
 755                         /* Don't block our own workqueue as this can
 756                          * be run in parallel with other i915.ko tasks.
 757                          */
 758                         schedule_work(&dev_priv->fbdev_suspend_work);
 759                         return;
 760                 }
 761         }
 762
 763         /* On resume from hibernation: If the object is shmemfs backed, it has
 764          * been restored from swap. If the object is stolen however, it will be
 765          * full of whatever garbage was left in there.
 766          */
 767         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 768                 memset_io(info->screen_base, 0, info->screen_size);
 769
 770         fb_set_suspend(info, state);
 771         console_unlock();
 772 #endif
 773 }
 774
 775 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 776 {
 777         struct drm_i915_private *dev_priv = dev->dev_private;
 778         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 779 }
 780
 781 void intel_fbdev_restore_mode(struct drm_device *dev)
 782 {
 783         int ret;
 784         struct drm_i915_private *dev_priv = dev->dev_private;
 785
 786         if (INTEL_INFO(dev)->num_pipes == 0)
 787                 return;
 788
 789         ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
 790         if (ret)
 791                 DRM_DEBUG("failed to restore crtc mode\n");
 792 }