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/async.h>
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/console.h>
  31 #include <linux/errno.h>
  32 #include <linux/string.h>
  33 #include <linux/mm.h>
  34 #include <linux/tty.h>
  35 #include <linux/sysrq.h>
  36 #include <linux/delay.h>
  37 #include <linux/fb.h>
  38 #include <linux/init.h>
  39 #include <linux/vga_switcheroo.h>
  40
  41 #include <drm/drmP.h>
  42 #include <drm/drm_crtc.h>
  43 #include <drm/drm_fb_helper.h>
  44 #include "intel_drv.h"
  45 #include <drm/i915_drm.h>
  46 #include "i915_drv.h"
  47
  48 static int intel_fbdev_set_par(struct fb_info *info)
  49 {
  50         struct drm_fb_helper *fb_helper = info->par;
  51         struct intel_fbdev *ifbdev =
  52                 container_of(fb_helper, struct intel_fbdev, helper);
  53         int ret;
  54
  55         ret = drm_fb_helper_set_par(info);
  56
  57         if (ret == 0) {
  58                 mutex_lock(&fb_helper->dev->struct_mutex);
  59                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  60                 mutex_unlock(&fb_helper->dev->struct_mutex);
  61         }
  62
  63         return ret;
  64 }
  65
  66 static int intel_fbdev_blank(int blank, struct fb_info *info)
  67 {
  68         struct drm_fb_helper *fb_helper = info->par;
  69         struct intel_fbdev *ifbdev =
  70                 container_of(fb_helper, struct intel_fbdev, helper);
  71         int ret;
  72
  73         ret = drm_fb_helper_blank(blank, info);
  74
  75         if (ret == 0) {
  76                 mutex_lock(&fb_helper->dev->struct_mutex);
  77                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  78                 mutex_unlock(&fb_helper->dev->struct_mutex);
  79         }
  80
  81         return ret;
  82 }
  83
  84 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
  85                                    struct fb_info *info)
  86 {
  87         struct drm_fb_helper *fb_helper = info->par;
  88         struct intel_fbdev *ifbdev =
  89                 container_of(fb_helper, struct intel_fbdev, helper);
  90
  91         int ret;
  92         ret = drm_fb_helper_pan_display(var, info);
  93
  94         if (ret == 0) {
  95                 mutex_lock(&fb_helper->dev->struct_mutex);
  96                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  97                 mutex_unlock(&fb_helper->dev->struct_mutex);
  98         }
  99
 100         return ret;
 101 }
 102
 103 static struct fb_ops intelfb_ops = {
 104         .owner = THIS_MODULE,
 105         .fb_check_var = drm_fb_helper_check_var,
 106         .fb_set_par = intel_fbdev_set_par,
 107         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 108         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 109         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 110         .fb_pan_display = intel_fbdev_pan_display,
 111         .fb_blank = intel_fbdev_blank,
 112         .fb_setcmap = drm_fb_helper_setcmap,
 113         .fb_debug_enter = drm_fb_helper_debug_enter,
 114         .fb_debug_leave = drm_fb_helper_debug_leave,
 115 };
 116
 117 static int intelfb_alloc(struct drm_fb_helper *helper,
 118                          struct drm_fb_helper_surface_size *sizes)
 119 {
 120         struct intel_fbdev *ifbdev =
 121                 container_of(helper, struct intel_fbdev, helper);
 122         struct drm_framebuffer *fb;
 123         struct drm_device *dev = helper->dev;
 124         struct drm_mode_fb_cmd2 mode_cmd = {};
 125         struct drm_i915_gem_object *obj;
 126         int size, ret;
 127
 128         /* we don't do packed 24bpp */
 129         if (sizes->surface_bpp == 24)
 130                 sizes->surface_bpp = 32;
 131
 132         mode_cmd.width = sizes->surface_width;
 133         mode_cmd.height = sizes->surface_height;
 134
 135         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 136                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 137         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 138                                                           sizes->surface_depth);
 139
 140         size = mode_cmd.pitches[0] * mode_cmd.height;
 141         size = PAGE_ALIGN(size);
 142         obj = i915_gem_object_create_stolen(dev, size);
 143         if (obj == NULL)
 144                 obj = i915_gem_alloc_object(dev, size);
 145         if (!obj) {
 146                 DRM_ERROR("failed to allocate framebuffer\n");
 147                 ret = -ENOMEM;
 148                 goto out;
 149         }
 150
 151         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 152         if (IS_ERR(fb)) {
 153                 ret = PTR_ERR(fb);
 154                 goto out_unref;
 155         }
 156
 157         /* Flush everything out, we'll be doing GTT only from now on */
 158         ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL, NULL);
 159         if (ret) {
 160                 DRM_ERROR("failed to pin obj: %d\n", ret);
 161                 goto out_fb;
 162         }
 163
 164         ifbdev->fb = to_intel_framebuffer(fb);
 165
 166         return 0;
 167
 168 out_fb:
 169         drm_framebuffer_remove(fb);
 170 out_unref:
 171         drm_gem_object_unreference(&obj->base);
 172 out:
 173         return ret;
 174 }
 175
 176 static int intelfb_create(struct drm_fb_helper *helper,
 177                           struct drm_fb_helper_surface_size *sizes)
 178 {
 179         struct intel_fbdev *ifbdev =
 180                 container_of(helper, struct intel_fbdev, helper);
 181         struct intel_framebuffer *intel_fb = ifbdev->fb;
 182         struct drm_device *dev = helper->dev;
 183         struct drm_i915_private *dev_priv = dev->dev_private;
 184         struct fb_info *info;
 185         struct drm_framebuffer *fb;
 186         struct drm_i915_gem_object *obj;
 187         int size, ret;
 188         bool prealloc = false;
 189
 190         mutex_lock(&dev->struct_mutex);
 191
 192         if (intel_fb &&
 193             (sizes->fb_width > intel_fb->base.width ||
 194              sizes->fb_height > intel_fb->base.height)) {
 195                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 196                               " releasing it\n",
 197                               intel_fb->base.width, intel_fb->base.height,
 198                               sizes->fb_width, sizes->fb_height);
 199                 drm_framebuffer_unreference(&intel_fb->base);
 200                 intel_fb = ifbdev->fb = NULL;
 201         }
 202         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 203                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 204                 ret = intelfb_alloc(helper, sizes);
 205                 if (ret)
 206                         goto out_unlock;
 207                 intel_fb = ifbdev->fb;
 208         } else {
 209                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 210                 prealloc = true;
 211                 sizes->fb_width = intel_fb->base.width;
 212                 sizes->fb_height = intel_fb->base.height;
 213         }
 214
 215         obj = intel_fb->obj;
 216         size = obj->base.size;
 217
 218         info = drm_fb_helper_alloc_fbi(helper);
 219         if (IS_ERR(info)) {
 220                 ret = PTR_ERR(info);
 221                 goto out_unpin;
 222         }
 223
 224         info->par = helper;
 225
 226         fb = &ifbdev->fb->base;
 227
 228         ifbdev->helper.fb = fb;
 229
 230         strcpy(info->fix.id, "inteldrmfb");
 231
 232         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 233         info->fbops = &intelfb_ops;
 234
 235         /* setup aperture base/size for vesafb takeover */
 236         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 237         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 238
 239         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 240         info->fix.smem_len = size;
 241
 242         info->screen_base =
 243                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 244                            size);
 245         if (!info->screen_base) {
 246                 ret = -ENOSPC;
 247                 goto out_destroy_fbi;
 248         }
 249         info->screen_size = size;
 250
 251         /* This driver doesn't need a VT switch to restore the mode on resume */
 252         info->skip_vt_switch = true;
 253
 254         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 255         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 256
 257         /* If the object is shmemfs backed, it will have given us zeroed pages.
 258          * If the object is stolen however, it will be full of whatever
 259          * garbage was left in there.
 260          */
 261         if (ifbdev->fb->obj->stolen && !prealloc)
 262                 memset_io(info->screen_base, 0, info->screen_size);
 263
 264         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 265
 266         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n",
 267                       fb->width, fb->height,
 268                       i915_gem_obj_ggtt_offset(obj), obj);
 269
 270         mutex_unlock(&dev->struct_mutex);
 271         vga_switcheroo_client_fb_set(dev->pdev, info);
 272         return 0;
 273
 274 out_destroy_fbi:
 275         drm_fb_helper_release_fbi(helper);
 276 out_unpin:
 277         i915_gem_object_ggtt_unpin(obj);
 278         drm_gem_object_unreference(&obj->base);
 279 out_unlock:
 280         mutex_unlock(&dev->struct_mutex);
 281         return ret;
 282 }
 283
 284 /** Sets the color ramps on behalf of RandR */
 285 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 286                                     u16 blue, int regno)
 287 {
 288         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 289
 290         intel_crtc->lut_r[regno] = red >> 8;
 291         intel_crtc->lut_g[regno] = green >> 8;
 292         intel_crtc->lut_b[regno] = blue >> 8;
 293 }
 294
 295 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 296                                     u16 *blue, int regno)
 297 {
 298         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 299
 300         *red = intel_crtc->lut_r[regno] << 8;
 301         *green = intel_crtc->lut_g[regno] << 8;
 302         *blue = intel_crtc->lut_b[regno] << 8;
 303 }
 304
 305 static struct drm_fb_helper_crtc *
 306 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 307 {
 308         int i;
 309
 310         for (i = 0; i < fb_helper->crtc_count; i++)
 311                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 312                         return &fb_helper->crtc_info[i];
 313
 314         return NULL;
 315 }
 316
 317 /*
 318  * Try to read the BIOS display configuration and use it for the initial
 319  * fb configuration.
 320  *
 321  * The BIOS or boot loader will generally create an initial display
 322  * configuration for us that includes some set of active pipes and displays.
 323  * This routine tries to figure out which pipes and connectors are active
 324  * and stuffs them into the crtcs and modes array given to us by the
 325  * drm_fb_helper code.
 326  *
 327  * The overall sequence is:
 328  *   intel_fbdev_init - from driver load
 329  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 330  *     drm_fb_helper_init - build fb helper structs
 331  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 332  *   intel_fbdev_initial_config - apply the config
 333  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 334  *         drm_setup_crtcs - build crtc config for fbdev
 335  *           intel_fb_initial_config - find active connectors etc
 336  *         drm_fb_helper_single_fb_probe - set up fbdev
 337  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 338  *
 339  * Note that we don't make special consideration whether we could actually
 340  * switch to the selected modes without a full modeset. E.g. when the display
 341  * is in VGA mode we need to recalculate watermarks and set a new high-res
 342  * framebuffer anyway.
 343  */
 344 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 345                                     struct drm_fb_helper_crtc **crtcs,
 346                                     struct drm_display_mode **modes,
 347                                     struct drm_fb_offset *offsets,
 348                                     bool *enabled, int width, int height)
 349 {
 350         struct drm_device *dev = fb_helper->dev;
 351         int i, j;
 352         bool *save_enabled;
 353         bool fallback = true;
 354         int num_connectors_enabled = 0;
 355         int num_connectors_detected = 0;
 356         uint64_t conn_configured = 0, mask;
 357         int pass = 0;
 358
 359         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 360                                GFP_KERNEL);
 361         if (!save_enabled)
 362                 return false;
 363
 364         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 365         mask = (1 << fb_helper->connector_count) - 1;
 366 retry:
 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 (conn_configured & (1 << i))
 377                         continue;
 378
 379                 if (pass == 0 && !connector->has_tile)
 380                         continue;
 381
 382                 if (connector->status == connector_status_connected)
 383                         num_connectors_detected++;
 384
 385                 if (!enabled[i]) {
 386                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 387                                       connector->name);
 388                         conn_configured |= (1 << i);
 389                         continue;
 390                 }
 391
 392                 if (connector->force == DRM_FORCE_OFF) {
 393                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 394                                       connector->name);
 395                         enabled[i] = false;
 396                         continue;
 397                 }
 398
 399                 encoder = connector->encoder;
 400                 if (!encoder || WARN_ON(!encoder->crtc)) {
 401                         if (connector->force > DRM_FORCE_OFF)
 402                                 goto bail;
 403
 404                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 405                                       connector->name);
 406                         enabled[i] = false;
 407                         conn_configured |= (1 << i);
 408                         continue;
 409                 }
 410
 411                 num_connectors_enabled++;
 412
 413                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 414
 415                 /*
 416                  * Make sure we're not trying to drive multiple connectors
 417                  * with a single CRTC, since our cloning support may not
 418                  * match the BIOS.
 419                  */
 420                 for (j = 0; j < fb_helper->connector_count; j++) {
 421                         if (crtcs[j] == new_crtc) {
 422                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 423                                 goto bail;
 424                         }
 425                 }
 426
 427                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 428                               connector->name);
 429
 430                 /* go for command line mode first */
 431                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 432
 433                 /* try for preferred next */
 434                 if (!modes[i]) {
 435                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 436                                       connector->name, connector->has_tile);
 437                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 438                                                           height);
 439                 }
 440
 441                 /* No preferred mode marked by the EDID? Are there any modes? */
 442                 if (!modes[i] && !list_empty(&connector->modes)) {
 443                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 444                                       connector->name);
 445                         modes[i] = list_first_entry(&connector->modes,
 446                                                     struct drm_display_mode,
 447                                                     head);
 448                 }
 449
 450                 /* last resort: use current mode */
 451                 if (!modes[i]) {
 452                         /*
 453                          * IMPORTANT: We want to use the adjusted mode (i.e.
 454                          * after the panel fitter upscaling) as the initial
 455                          * config, not the input mode, which is what crtc->mode
 456                          * usually contains. But since our current
 457                          * code puts a mode derived from the post-pfit timings
 458                          * into crtc->mode this works out correctly.
 459                          */
 460                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 461                                       connector->name);
 462                         modes[i] = &encoder->crtc->mode;
 463                 }
 464                 crtcs[i] = new_crtc;
 465
 466                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 467                               connector->name,
 468                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 469                               encoder->crtc->base.id,
 470                               modes[i]->hdisplay, modes[i]->vdisplay,
 471                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 472
 473                 fallback = false;
 474                 conn_configured |= (1 << i);
 475         }
 476
 477         if ((conn_configured & mask) != mask) {
 478                 pass++;
 479                 goto retry;
 480         }
 481
 482         /*
 483          * If the BIOS didn't enable everything it could, fall back to have the
 484          * same user experiencing of lighting up as much as possible like the
 485          * fbdev helper library.
 486          */
 487         if (num_connectors_enabled != num_connectors_detected &&
 488             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 489                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 490                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 491                               num_connectors_detected);
 492                 fallback = true;
 493         }
 494
 495         if (fallback) {
 496 bail:
 497                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 498                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 499                 kfree(save_enabled);
 500                 return false;
 501         }
 502
 503         kfree(save_enabled);
 504         return true;
 505 }
 506
 507 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 508         .initial_config = intel_fb_initial_config,
 509         .gamma_set = intel_crtc_fb_gamma_set,
 510         .gamma_get = intel_crtc_fb_gamma_get,
 511         .fb_probe = intelfb_create,
 512 };
 513
 514 static void intel_fbdev_destroy(struct drm_device *dev,
 515                                 struct intel_fbdev *ifbdev)
 516 {
 517
 518         drm_fb_helper_unregister_fbi(&ifbdev->helper);
 519         drm_fb_helper_release_fbi(&ifbdev->helper);
 520
 521         drm_fb_helper_fini(&ifbdev->helper);
 522
 523         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 524         drm_framebuffer_remove(&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         unsigned int max_size = 0;
 543
 544         /* Find the largest fb */
 545         for_each_crtc(dev, crtc) {
 546                 struct drm_i915_gem_object *obj =
 547                         intel_fb_obj(crtc->primary->state->fb);
 548                 intel_crtc = to_intel_crtc(crtc);
 549
 550                 if (!crtc->state->active || !obj) {
 551                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 552                                       pipe_name(intel_crtc->pipe));
 553                         continue;
 554                 }
 555
 556                 if (obj->base.size > max_size) {
 557                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 558                                       pipe_name(intel_crtc->pipe));
 559                         fb = to_intel_framebuffer(crtc->primary->state->fb);
 560                         max_size = obj->base.size;
 561                 }
 562         }
 563
 564         if (!fb) {
 565                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 566                 goto out;
 567         }
 568
 569         /* Now make sure all the pipes will fit into it */
 570         for_each_crtc(dev, crtc) {
 571                 unsigned int cur_size;
 572
 573                 intel_crtc = to_intel_crtc(crtc);
 574
 575                 if (!crtc->state->active) {
 576                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 577                                       pipe_name(intel_crtc->pipe));
 578                         continue;
 579                 }
 580
 581                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 582                               pipe_name(intel_crtc->pipe));
 583
 584                 /*
 585                  * See if the plane fb we found above will fit on this
 586                  * pipe.  Note we need to use the selected fb's pitch and bpp
 587                  * rather than the current pipe's, since they differ.
 588                  */
 589                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 590                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 591                 if (fb->base.pitches[0] < cur_size) {
 592                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 593                                       pipe_name(intel_crtc->pipe),
 594                                       cur_size, fb->base.pitches[0]);
 595                         fb = NULL;
 596                         break;
 597                 }
 598
 599                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 600                 cur_size = intel_fb_align_height(dev, cur_size,
 601                                                  fb->base.pixel_format,
 602                                                  fb->base.modifier[0]);
 603                 cur_size *= fb->base.pitches[0];
 604                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 605                               pipe_name(intel_crtc->pipe),
 606                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 607                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 608                               fb->base.bits_per_pixel,
 609                               cur_size);
 610
 611                 if (cur_size > max_size) {
 612                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 613                                       pipe_name(intel_crtc->pipe),
 614                                       cur_size, max_size);
 615                         fb = NULL;
 616                         break;
 617                 }
 618
 619                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 620                               pipe_name(intel_crtc->pipe),
 621                               max_size, cur_size);
 622         }
 623
 624         if (!fb) {
 625                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 626                 goto out;
 627         }
 628
 629         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 630         ifbdev->fb = fb;
 631
 632         drm_framebuffer_reference(&ifbdev->fb->base);
 633
 634         /* Final pass to check if any active pipes don't have fbs */
 635         for_each_crtc(dev, crtc) {
 636                 intel_crtc = to_intel_crtc(crtc);
 637
 638                 if (!crtc->state->active)
 639                         continue;
 640
 641                 WARN(!crtc->primary->fb,
 642                      "re-used BIOS config but lost an fb on crtc %d\n",
 643                      crtc->base.id);
 644         }
 645
 646
 647         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 648         return true;
 649
 650 out:
 651
 652         return false;
 653 }
 654
 655 static void intel_fbdev_suspend_worker(struct work_struct *work)
 656 {
 657         intel_fbdev_set_suspend(container_of(work,
 658                                              struct drm_i915_private,
 659                                              fbdev_suspend_work)->dev,
 660                                 FBINFO_STATE_RUNNING,
 661                                 true);
 662 }
 663
 664 int intel_fbdev_init(struct drm_device *dev)
 665 {
 666         struct intel_fbdev *ifbdev;
 667         struct drm_i915_private *dev_priv = dev->dev_private;
 668         int ret;
 669
 670         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 671                 return -ENODEV;
 672
 673         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 674         if (ifbdev == NULL)
 675                 return -ENOMEM;
 676
 677         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 678
 679         if (!intel_fbdev_init_bios(dev, ifbdev))
 680                 ifbdev->preferred_bpp = 32;
 681
 682         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 683                                  INTEL_INFO(dev)->num_pipes, 4);
 684         if (ret) {
 685                 kfree(ifbdev);
 686                 return ret;
 687         }
 688
 689         ifbdev->helper.atomic = true;
 690
 691         dev_priv->fbdev = ifbdev;
 692         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 693
 694         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 695
 696         return 0;
 697 }
 698
 699 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 700 {
 701         struct drm_i915_private *dev_priv = data;
 702         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 703
 704         /* Due to peculiar init order wrt to hpd handling this is separate. */
 705         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
 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         flush_work(&dev_priv->fbdev_suspend_work);
 715
 716         async_synchronize_full();
 717         intel_fbdev_destroy(dev, dev_priv->fbdev);
 718         kfree(dev_priv->fbdev);
 719         dev_priv->fbdev = NULL;
 720 }
 721
 722 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 723 {
 724         struct drm_i915_private *dev_priv = dev->dev_private;
 725         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 726         struct fb_info *info;
 727
 728         if (!ifbdev)
 729                 return;
 730
 731         info = ifbdev->helper.fbdev;
 732
 733         if (synchronous) {
 734                 /* Flush any pending work to turn the console on, and then
 735                  * wait to turn it off. It must be synchronous as we are
 736                  * about to suspend or unload the driver.
 737                  *
 738                  * Note that from within the work-handler, we cannot flush
 739                  * ourselves, so only flush outstanding work upon suspend!
 740                  */
 741                 if (state != FBINFO_STATE_RUNNING)
 742                         flush_work(&dev_priv->fbdev_suspend_work);
 743                 console_lock();
 744         } else {
 745                 /*
 746                  * The console lock can be pretty contented on resume due
 747                  * to all the printk activity.  Try to keep it out of the hot
 748                  * path of resume if possible.
 749                  */
 750                 WARN_ON(state != FBINFO_STATE_RUNNING);
 751                 if (!console_trylock()) {
 752                         /* Don't block our own workqueue as this can
 753                          * be run in parallel with other i915.ko tasks.
 754                          */
 755                         schedule_work(&dev_priv->fbdev_suspend_work);
 756                         return;
 757                 }
 758         }
 759
 760         /* On resume from hibernation: If the object is shmemfs backed, it has
 761          * been restored from swap. If the object is stolen however, it will be
 762          * full of whatever garbage was left in there.
 763          */
 764         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 765                 memset_io(info->screen_base, 0, info->screen_size);
 766
 767         drm_fb_helper_set_suspend(&ifbdev->helper, state);
 768         console_unlock();
 769 }
 770
 771 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 772 {
 773         struct drm_i915_private *dev_priv = dev->dev_private;
 774         if (dev_priv->fbdev)
 775                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 776 }
 777
 778 void intel_fbdev_restore_mode(struct drm_device *dev)
 779 {
 780         int ret;
 781         struct drm_i915_private *dev_priv = dev->dev_private;
 782         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 783         struct drm_fb_helper *fb_helper;
 784
 785         if (!ifbdev)
 786                 return;
 787
 788         fb_helper = &ifbdev->helper;
 789
 790         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 791         if (ret) {
 792                 DRM_DEBUG("failed to restore crtc mode\n");
 793         } else {
 794                 mutex_lock(&fb_helper->dev->struct_mutex);
 795                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
 796                 mutex_unlock(&fb_helper->dev->struct_mutex);
 797         }
 798 }