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         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 121         if (IS_ERR(fb)) {
 122                 ret = PTR_ERR(fb);
 123                 goto out_unref;
 124         }
 125
 126         /* Flush everything out, we'll be doing GTT only from now on */
 127         ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL);
 128         if (ret) {
 129                 DRM_ERROR("failed to pin obj: %d\n", ret);
 130                 goto out_fb;
 131         }
 132
 133         ifbdev->fb = to_intel_framebuffer(fb);
 134
 135         return 0;
 136
 137 out_fb:
 138         drm_framebuffer_remove(fb);
 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
 198 #if 0
 199         info->par = helper;
 200 #endif
 201
 202         fb = &ifbdev->fb->base;
 203
 204 #ifdef __DragonFly__
 205         vga_dev = device_get_parent(dev->dev);
 206         info->width = sizes->fb_width;
 207         info->height = sizes->fb_height;
 208         info->stride = fb->pitches[0];
 209         info->depth = sizes->surface_bpp;
 210         info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
 211         info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
 212         info->vaddr =
 213             (vm_offset_t)pmap_mapdev_attr(info->paddr,
 214                 sizes->surface_height * info->stride,
 215                 VM_MEMATTR_WRITE_COMBINING);
 216 #endif
 217
 218         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                                     struct drm_fb_offset *offsets,
 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         uint64_t conn_configured = 0, mask;
 360         int pass = 0;
 361
 362         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 363                                GFP_KERNEL);
 364         if (!save_enabled)
 365                 return false;
 366
 367         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 368         mask = (1 << fb_helper->connector_count) - 1;
 369 retry:
 370         for (i = 0; i < fb_helper->connector_count; i++) {
 371                 struct drm_fb_helper_connector *fb_conn;
 372                 struct drm_connector *connector;
 373                 struct drm_encoder *encoder;
 374                 struct drm_fb_helper_crtc *new_crtc;
 375
 376                 fb_conn = fb_helper->connector_info[i];
 377                 connector = fb_conn->connector;
 378
 379                 if (conn_configured & (1 << i))
 380                         continue;
 381
 382                 if (pass == 0 && !connector->has_tile)
 383                         continue;
 384
 385                 if (connector->status == connector_status_connected)
 386                         num_connectors_detected++;
 387
 388                 if (!enabled[i]) {
 389                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 390                                       connector->name);
 391                         conn_configured |= (1 << i);
 392                         continue;
 393                 }
 394
 395                 if (connector->force == DRM_FORCE_OFF) {
 396                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 397                                       connector->name);
 398                         enabled[i] = false;
 399                         continue;
 400                 }
 401
 402                 encoder = connector->encoder;
 403                 if (!encoder || WARN_ON(!encoder->crtc)) {
 404                         if (connector->force > DRM_FORCE_OFF)
 405                                 goto bail;
 406
 407                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 408                                       connector->name);
 409                         enabled[i] = false;
 410                         conn_configured |= (1 << i);
 411                         continue;
 412                 }
 413
 414                 num_connectors_enabled++;
 415
 416                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 417
 418                 /*
 419                  * Make sure we're not trying to drive multiple connectors
 420                  * with a single CRTC, since our cloning support may not
 421                  * match the BIOS.
 422                  */
 423                 for (j = 0; j < fb_helper->connector_count; j++) {
 424                         if (crtcs[j] == new_crtc) {
 425                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 426                                 goto bail;
 427                         }
 428                 }
 429
 430                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 431                               connector->name);
 432
 433                 /* go for command line mode first */
 434                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 435
 436                 /* try for preferred next */
 437                 if (!modes[i]) {
 438                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 439                                       connector->name, connector->has_tile);
 440                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 441                                                           height);
 442                 }
 443
 444                 /* No preferred mode marked by the EDID? Are there any modes? */
 445                 if (!modes[i] && !list_empty(&connector->modes)) {
 446                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 447                                       connector->name);
 448                         modes[i] = list_first_entry(&connector->modes,
 449                                                     struct drm_display_mode,
 450                                                     head);
 451                 }
 452
 453                 /* last resort: use current mode */
 454                 if (!modes[i]) {
 455                         /*
 456                          * IMPORTANT: We want to use the adjusted mode (i.e.
 457                          * after the panel fitter upscaling) as the initial
 458                          * config, not the input mode, which is what crtc->mode
 459                          * usually contains. But since our current fastboot
 460                          * code puts a mode derived from the post-pfit timings
 461                          * into crtc->mode this works out correctly. We don't
 462                          * use hwmode anywhere right now, so use it for this
 463                          * since the fb helper layer wants a pointer to
 464                          * something we own.
 465                          */
 466                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 467                                       connector->name);
 468                         intel_mode_from_pipe_config(&encoder->crtc->hwmode,
 469                                                     to_intel_crtc(encoder->crtc)->config);
 470                         modes[i] = &encoder->crtc->hwmode;
 471                 }
 472                 crtcs[i] = new_crtc;
 473
 474                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 475                               connector->name,
 476                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 477                               encoder->crtc->base.id,
 478                               modes[i]->hdisplay, modes[i]->vdisplay,
 479                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 480
 481                 fallback = false;
 482                 conn_configured |= (1 << i);
 483         }
 484
 485         if ((conn_configured & mask) != mask) {
 486                 pass++;
 487                 goto retry;
 488         }
 489
 490         /*
 491          * If the BIOS didn't enable everything it could, fall back to have the
 492          * same user experiencing of lighting up as much as possible like the
 493          * fbdev helper library.
 494          */
 495         if (num_connectors_enabled != num_connectors_detected &&
 496             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 497                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 498                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 499                               num_connectors_detected);
 500                 fallback = true;
 501         }
 502
 503         if (fallback) {
 504 bail:
 505                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 506                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 507                 kfree(save_enabled);
 508                 return false;
 509         }
 510
 511         kfree(save_enabled);
 512         return true;
 513 }
 514
 515 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 516         .initial_config = intel_fb_initial_config,
 517         .gamma_set = intel_crtc_fb_gamma_set,
 518         .gamma_get = intel_crtc_fb_gamma_get,
 519         .fb_probe = intelfb_create,
 520 };
 521
 522 static void intel_fbdev_destroy(struct drm_device *dev,
 523                                 struct intel_fbdev *ifbdev)
 524 {
 525 #if 0
 526         if (ifbdev->helper.fbdev) {
 527                 struct fb_info *info = ifbdev->helper.fbdev;
 528
 529                 unregister_framebuffer(info);
 530                 iounmap(info->screen_base);
 531                 if (info->cmap.len)
 532                         fb_dealloc_cmap(&info->cmap);
 533
 534                 framebuffer_release(info);
 535         }
 536 #endif
 537
 538         drm_fb_helper_fini(&ifbdev->helper);
 539
 540         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 541         drm_framebuffer_remove(&ifbdev->fb->base);
 542 }
 543
 544 /*
 545  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 546  * The core display code will have read out the current plane configuration,
 547  * so we use that to figure out if there's an object for us to use as the
 548  * fb, and if so, we re-use it for the fbdev configuration.
 549  *
 550  * Note we only support a single fb shared across pipes for boot (mostly for
 551  * fbcon), so we just find the biggest and use that.
 552  */
 553 static bool intel_fbdev_init_bios(struct drm_device *dev,
 554                                  struct intel_fbdev *ifbdev)
 555 {
 556         struct intel_framebuffer *fb = NULL;
 557         struct drm_crtc *crtc;
 558         struct intel_crtc *intel_crtc;
 559         struct intel_initial_plane_config *plane_config = NULL;
 560         unsigned int max_size = 0;
 561
 562         if (!i915.fastboot)
 563                 return false;
 564
 565         /* Find the largest fb */
 566         for_each_crtc(dev, crtc) {
 567                 intel_crtc = to_intel_crtc(crtc);
 568
 569                 if (!intel_crtc->active || !crtc->primary->fb) {
 570                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 571                                       pipe_name(intel_crtc->pipe));
 572                         continue;
 573                 }
 574
 575                 if (intel_crtc->plane_config.size > max_size) {
 576                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 577                                       pipe_name(intel_crtc->pipe));
 578                         plane_config = &intel_crtc->plane_config;
 579                         fb = to_intel_framebuffer(crtc->primary->fb);
 580                         max_size = plane_config->size;
 581                 }
 582         }
 583
 584         if (!fb) {
 585                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 586                 goto out;
 587         }
 588
 589         /* Now make sure all the pipes will fit into it */
 590         for_each_crtc(dev, crtc) {
 591                 unsigned int cur_size;
 592
 593                 intel_crtc = to_intel_crtc(crtc);
 594
 595                 if (!intel_crtc->active) {
 596                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 597                                       pipe_name(intel_crtc->pipe));
 598                         continue;
 599                 }
 600
 601                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 602                               pipe_name(intel_crtc->pipe));
 603
 604                 /*
 605                  * See if the plane fb we found above will fit on this
 606                  * pipe.  Note we need to use the selected fb's pitch and bpp
 607                  * rather than the current pipe's, since they differ.
 608                  */
 609                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 610                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 611                 if (fb->base.pitches[0] < cur_size) {
 612                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 613                                       pipe_name(intel_crtc->pipe),
 614                                       cur_size, fb->base.pitches[0]);
 615                         plane_config = NULL;
 616                         fb = NULL;
 617                         break;
 618                 }
 619
 620                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 621                 cur_size = intel_fb_align_height(dev, cur_size,
 622                                                  plane_config->tiling);
 623                 cur_size *= fb->base.pitches[0];
 624                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 625                               pipe_name(intel_crtc->pipe),
 626                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 627                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 628                               fb->base.bits_per_pixel,
 629                               cur_size);
 630
 631                 if (cur_size > max_size) {
 632                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 633                                       pipe_name(intel_crtc->pipe),
 634                                       cur_size, max_size);
 635                         plane_config = NULL;
 636                         fb = NULL;
 637                         break;
 638                 }
 639
 640                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 641                               pipe_name(intel_crtc->pipe),
 642                               max_size, cur_size);
 643         }
 644
 645         if (!fb) {
 646                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 647                 goto out;
 648         }
 649
 650         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 651         ifbdev->fb = fb;
 652
 653         drm_framebuffer_reference(&ifbdev->fb->base);
 654
 655         /* Final pass to check if any active pipes don't have fbs */
 656         for_each_crtc(dev, crtc) {
 657                 intel_crtc = to_intel_crtc(crtc);
 658
 659                 if (!intel_crtc->active)
 660                         continue;
 661
 662                 WARN(!crtc->primary->fb,
 663                      "re-used BIOS config but lost an fb on crtc %d\n",
 664                      crtc->base.id);
 665         }
 666
 667
 668         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 669         return true;
 670
 671 out:
 672
 673         return false;
 674 }
 675
 676 static void intel_fbdev_suspend_worker(struct work_struct *work)
 677 {
 678         intel_fbdev_set_suspend(container_of(work,
 679                                              struct drm_i915_private,
 680                                              fbdev_suspend_work)->dev,
 681                                 FBINFO_STATE_RUNNING,
 682                                 true);
 683 }
 684
 685 int intel_fbdev_init(struct drm_device *dev)
 686 {
 687         struct intel_fbdev *ifbdev;
 688         struct drm_i915_private *dev_priv = dev->dev_private;
 689         int ret;
 690
 691         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 692                 return -ENODEV;
 693
 694         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 695         if (ifbdev == NULL)
 696                 return -ENOMEM;
 697
 698         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 699
 700         if (!intel_fbdev_init_bios(dev, ifbdev))
 701                 ifbdev->preferred_bpp = 32;
 702
 703         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 704                                  INTEL_INFO(dev)->num_pipes, 4);
 705         if (ret) {
 706                 kfree(ifbdev);
 707                 return ret;
 708         }
 709
 710         dev_priv->fbdev = ifbdev;
 711         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 712
 713         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 714
 715         return 0;
 716 }
 717
 718 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 719 {
 720         struct drm_i915_private *dev_priv = data;
 721         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 722
 723         /* Due to peculiar init order wrt to hpd handling this is separate. */
 724         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
 725 }
 726
 727 void intel_fbdev_fini(struct drm_device *dev)
 728 {
 729         struct drm_i915_private *dev_priv = dev->dev_private;
 730         if (!dev_priv->fbdev)
 731                 return;
 732
 733 #if 0
 734         flush_work(&dev_priv->fbdev_suspend_work);
 735 #endif
 736
 737         async_synchronize_full();
 738         intel_fbdev_destroy(dev, dev_priv->fbdev);
 739         kfree(dev_priv->fbdev);
 740         dev_priv->fbdev = NULL;
 741 }
 742
 743 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 744 {
 745 #if 0
 746         struct drm_i915_private *dev_priv = dev->dev_private;
 747         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 748         struct fb_info *info;
 749
 750         if (!ifbdev)
 751                 return;
 752
 753         info = ifbdev->helper.fbdev;
 754
 755         if (synchronous) {
 756                 /* Flush any pending work to turn the console on, and then
 757                  * wait to turn it off. It must be synchronous as we are
 758                  * about to suspend or unload the driver.
 759                  *
 760                  * Note that from within the work-handler, we cannot flush
 761                  * ourselves, so only flush outstanding work upon suspend!
 762                  */
 763                 if (state != FBINFO_STATE_RUNNING)
 764                         flush_work(&dev_priv->fbdev_suspend_work);
 765                 console_lock();
 766         } else {
 767                 /*
 768                  * The console lock can be pretty contented on resume due
 769                  * to all the printk activity.  Try to keep it out of the hot
 770                  * path of resume if possible.
 771                  */
 772                 WARN_ON(state != FBINFO_STATE_RUNNING);
 773                 if (!console_trylock()) {
 774                         /* Don't block our own workqueue as this can
 775                          * be run in parallel with other i915.ko tasks.
 776                          */
 777                         schedule_work(&dev_priv->fbdev_suspend_work);
 778                         return;
 779                 }
 780         }
 781
 782         /* On resume from hibernation: If the object is shmemfs backed, it has
 783          * been restored from swap. If the object is stolen however, it will be
 784          * full of whatever garbage was left in there.
 785          */
 786         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 787                 memset_io(info->screen_base, 0, info->screen_size);
 788
 789         fb_set_suspend(info, state);
 790         console_unlock();
 791 #endif
 792 }
 793
 794 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 795 {
 796         struct drm_i915_private *dev_priv = dev->dev_private;
 797         if (dev_priv->fbdev)
 798                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 799 }
 800
 801 void intel_fbdev_restore_mode(struct drm_device *dev)
 802 {
 803         int ret;
 804         struct drm_i915_private *dev_priv = dev->dev_private;
 805
 806         if (!dev_priv->fbdev)
 807                 return;
 808
 809         ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
 810         if (ret)
 811                 DRM_DEBUG("failed to restore crtc mode\n");
 812 }