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 = NULL;
 123         struct drm_device *dev = helper->dev;
 124         struct drm_i915_private *dev_priv = to_i915(dev);
 125         struct drm_mode_fb_cmd2 mode_cmd = {};
 126         struct drm_i915_gem_object *obj = NULL;
 127         int size, ret;
 128
 129         /* we don't do packed 24bpp */
 130         if (sizes->surface_bpp == 24)
 131                 sizes->surface_bpp = 32;
 132
 133         mode_cmd.width = sizes->surface_width;
 134         mode_cmd.height = sizes->surface_height;
 135
 136         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 137                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 138         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 139                                                           sizes->surface_depth);
 140
 141         mutex_lock(&dev->struct_mutex);
 142
 143         size = mode_cmd.pitches[0] * mode_cmd.height;
 144         size = PAGE_ALIGN(size);
 145
 146         /* If the FB is too big, just don't use it since fbdev is not very
 147          * important and we should probably use that space with FBC or other
 148          * features. */
 149         if (size * 2 < dev_priv->gtt.stolen_usable_size)
 150                 obj = i915_gem_object_create_stolen(dev, size);
 151         if (obj == NULL)
 152                 obj = i915_gem_alloc_object(dev, size);
 153         if (!obj) {
 154                 DRM_ERROR("failed to allocate framebuffer\n");
 155                 ret = -ENOMEM;
 156                 goto out;
 157         }
 158
 159         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 160         if (IS_ERR(fb)) {
 161                 drm_gem_object_unreference(&obj->base);
 162                 ret = PTR_ERR(fb);
 163                 goto out;
 164         }
 165
 166         /* Flush everything out, we'll be doing GTT only from now on */
 167         ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL);
 168         if (ret) {
 169                 DRM_ERROR("failed to pin obj: %d\n", ret);
 170                 goto out;
 171         }
 172
 173         mutex_unlock(&dev->struct_mutex);
 174
 175         ifbdev->fb = to_intel_framebuffer(fb);
 176
 177         return 0;
 178
 179 out:
 180         mutex_unlock(&dev->struct_mutex);
 181         if (!IS_ERR_OR_NULL(fb))
 182                 drm_framebuffer_unreference(fb);
 183         return ret;
 184 }
 185
 186 static int intelfb_create(struct drm_fb_helper *helper,
 187                           struct drm_fb_helper_surface_size *sizes)
 188 {
 189         struct intel_fbdev *ifbdev =
 190                 container_of(helper, struct intel_fbdev, helper);
 191         struct intel_framebuffer *intel_fb = ifbdev->fb;
 192         struct drm_device *dev = helper->dev;
 193         struct drm_i915_private *dev_priv = dev->dev_private;
 194         struct fb_info *info;
 195         struct drm_framebuffer *fb;
 196         struct drm_i915_gem_object *obj;
 197         int size, ret;
 198         bool prealloc = false;
 199
 200         if (intel_fb &&
 201             (sizes->fb_width > intel_fb->base.width ||
 202              sizes->fb_height > intel_fb->base.height)) {
 203                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 204                               " releasing it\n",
 205                               intel_fb->base.width, intel_fb->base.height,
 206                               sizes->fb_width, sizes->fb_height);
 207                 drm_framebuffer_unreference(&intel_fb->base);
 208                 intel_fb = ifbdev->fb = NULL;
 209         }
 210         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 211                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 212                 ret = intelfb_alloc(helper, sizes);
 213                 if (ret)
 214                         return ret;
 215                 intel_fb = ifbdev->fb;
 216         } else {
 217                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 218                 prealloc = true;
 219                 sizes->fb_width = intel_fb->base.width;
 220                 sizes->fb_height = intel_fb->base.height;
 221         }
 222
 223         obj = intel_fb->obj;
 224         size = obj->base.size;
 225
 226         mutex_lock(&dev->struct_mutex);
 227
 228         info = drm_fb_helper_alloc_fbi(helper);
 229         if (IS_ERR(info)) {
 230                 ret = PTR_ERR(info);
 231                 goto out_unpin;
 232         }
 233
 234         info->par = helper;
 235
 236         fb = &ifbdev->fb->base;
 237
 238         ifbdev->helper.fb = fb;
 239
 240         strcpy(info->fix.id, "inteldrmfb");
 241
 242         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 243         info->fbops = &intelfb_ops;
 244
 245         /* setup aperture base/size for vesafb takeover */
 246         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 247         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 248
 249         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 250         info->fix.smem_len = size;
 251
 252         info->screen_base =
 253                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 254                            size);
 255         if (!info->screen_base) {
 256                 ret = -ENOSPC;
 257                 goto out_destroy_fbi;
 258         }
 259         info->screen_size = size;
 260
 261         /* This driver doesn't need a VT switch to restore the mode on resume */
 262         info->skip_vt_switch = true;
 263
 264         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 265         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 266
 267         /* If the object is shmemfs backed, it will have given us zeroed pages.
 268          * If the object is stolen however, it will be full of whatever
 269          * garbage was left in there.
 270          */
 271         if (ifbdev->fb->obj->stolen && !prealloc)
 272                 memset_io(info->screen_base, 0, info->screen_size);
 273
 274         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 275
 276         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08llx, bo %p\n",
 277                       fb->width, fb->height,
 278                       i915_gem_obj_ggtt_offset(obj), obj);
 279
 280         mutex_unlock(&dev->struct_mutex);
 281         vga_switcheroo_client_fb_set(dev->pdev, info);
 282         return 0;
 283
 284 out_destroy_fbi:
 285         drm_fb_helper_release_fbi(helper);
 286 out_unpin:
 287         i915_gem_object_ggtt_unpin(obj);
 288         drm_gem_object_unreference(&obj->base);
 289         mutex_unlock(&dev->struct_mutex);
 290         return ret;
 291 }
 292
 293 /** Sets the color ramps on behalf of RandR */
 294 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 295                                     u16 blue, int regno)
 296 {
 297         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 298
 299         intel_crtc->lut_r[regno] = red >> 8;
 300         intel_crtc->lut_g[regno] = green >> 8;
 301         intel_crtc->lut_b[regno] = blue >> 8;
 302 }
 303
 304 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 305                                     u16 *blue, int regno)
 306 {
 307         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 308
 309         *red = intel_crtc->lut_r[regno] << 8;
 310         *green = intel_crtc->lut_g[regno] << 8;
 311         *blue = intel_crtc->lut_b[regno] << 8;
 312 }
 313
 314 static struct drm_fb_helper_crtc *
 315 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 316 {
 317         int i;
 318
 319         for (i = 0; i < fb_helper->crtc_count; i++)
 320                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 321                         return &fb_helper->crtc_info[i];
 322
 323         return NULL;
 324 }
 325
 326 /*
 327  * Try to read the BIOS display configuration and use it for the initial
 328  * fb configuration.
 329  *
 330  * The BIOS or boot loader will generally create an initial display
 331  * configuration for us that includes some set of active pipes and displays.
 332  * This routine tries to figure out which pipes and connectors are active
 333  * and stuffs them into the crtcs and modes array given to us by the
 334  * drm_fb_helper code.
 335  *
 336  * The overall sequence is:
 337  *   intel_fbdev_init - from driver load
 338  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 339  *     drm_fb_helper_init - build fb helper structs
 340  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 341  *   intel_fbdev_initial_config - apply the config
 342  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 343  *         drm_setup_crtcs - build crtc config for fbdev
 344  *           intel_fb_initial_config - find active connectors etc
 345  *         drm_fb_helper_single_fb_probe - set up fbdev
 346  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 347  *
 348  * Note that we don't make special consideration whether we could actually
 349  * switch to the selected modes without a full modeset. E.g. when the display
 350  * is in VGA mode we need to recalculate watermarks and set a new high-res
 351  * framebuffer anyway.
 352  */
 353 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 354                                     struct drm_fb_helper_crtc **crtcs,
 355                                     struct drm_display_mode **modes,
 356                                     struct drm_fb_offset *offsets,
 357                                     bool *enabled, int width, int height)
 358 {
 359         struct drm_device *dev = fb_helper->dev;
 360         int i, j;
 361         bool *save_enabled;
 362         bool fallback = true;
 363         int num_connectors_enabled = 0;
 364         int num_connectors_detected = 0;
 365         uint64_t conn_configured = 0, mask;
 366         int pass = 0;
 367
 368         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 369                                GFP_KERNEL);
 370         if (!save_enabled)
 371                 return false;
 372
 373         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 374         mask = (1 << fb_helper->connector_count) - 1;
 375 retry:
 376         for (i = 0; i < fb_helper->connector_count; i++) {
 377                 struct drm_fb_helper_connector *fb_conn;
 378                 struct drm_connector *connector;
 379                 struct drm_encoder *encoder;
 380                 struct drm_fb_helper_crtc *new_crtc;
 381
 382                 fb_conn = fb_helper->connector_info[i];
 383                 connector = fb_conn->connector;
 384
 385                 if (conn_configured & (1 << i))
 386                         continue;
 387
 388                 if (pass == 0 && !connector->has_tile)
 389                         continue;
 390
 391                 if (connector->status == connector_status_connected)
 392                         num_connectors_detected++;
 393
 394                 if (!enabled[i]) {
 395                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 396                                       connector->name);
 397                         conn_configured |= (1 << i);
 398                         continue;
 399                 }
 400
 401                 if (connector->force == DRM_FORCE_OFF) {
 402                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 403                                       connector->name);
 404                         enabled[i] = false;
 405                         continue;
 406                 }
 407
 408                 encoder = connector->encoder;
 409                 if (!encoder || WARN_ON(!encoder->crtc)) {
 410                         if (connector->force > DRM_FORCE_OFF)
 411                                 goto bail;
 412
 413                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 414                                       connector->name);
 415                         enabled[i] = false;
 416                         conn_configured |= (1 << i);
 417                         continue;
 418                 }
 419
 420                 num_connectors_enabled++;
 421
 422                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 423
 424                 /*
 425                  * Make sure we're not trying to drive multiple connectors
 426                  * with a single CRTC, since our cloning support may not
 427                  * match the BIOS.
 428                  */
 429                 for (j = 0; j < fb_helper->connector_count; j++) {
 430                         if (crtcs[j] == new_crtc) {
 431                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 432                                 goto bail;
 433                         }
 434                 }
 435
 436                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 437                               connector->name);
 438
 439                 /* go for command line mode first */
 440                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 441
 442                 /* try for preferred next */
 443                 if (!modes[i]) {
 444                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 445                                       connector->name, connector->has_tile);
 446                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 447                                                           height);
 448                 }
 449
 450                 /* No preferred mode marked by the EDID? Are there any modes? */
 451                 if (!modes[i] && !list_empty(&connector->modes)) {
 452                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 453                                       connector->name);
 454                         modes[i] = list_first_entry(&connector->modes,
 455                                                     struct drm_display_mode,
 456                                                     head);
 457                 }
 458
 459                 /* last resort: use current mode */
 460                 if (!modes[i]) {
 461                         /*
 462                          * IMPORTANT: We want to use the adjusted mode (i.e.
 463                          * after the panel fitter upscaling) as the initial
 464                          * config, not the input mode, which is what crtc->mode
 465                          * usually contains. But since our current
 466                          * code puts a mode derived from the post-pfit timings
 467                          * into crtc->mode this works out correctly.
 468                          */
 469                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 470                                       connector->name);
 471                         modes[i] = &encoder->crtc->mode;
 472                 }
 473                 crtcs[i] = new_crtc;
 474
 475                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 476                               connector->name,
 477                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 478                               encoder->crtc->base.id,
 479                               modes[i]->hdisplay, modes[i]->vdisplay,
 480                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 481
 482                 fallback = false;
 483                 conn_configured |= (1 << i);
 484         }
 485
 486         if ((conn_configured & mask) != mask) {
 487                 pass++;
 488                 goto retry;
 489         }
 490
 491         /*
 492          * If the BIOS didn't enable everything it could, fall back to have the
 493          * same user experiencing of lighting up as much as possible like the
 494          * fbdev helper library.
 495          */
 496         if (num_connectors_enabled != num_connectors_detected &&
 497             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 498                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 499                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 500                               num_connectors_detected);
 501                 fallback = true;
 502         }
 503
 504         if (fallback) {
 505 bail:
 506                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 507                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 508                 kfree(save_enabled);
 509                 return false;
 510         }
 511
 512         kfree(save_enabled);
 513         return true;
 514 }
 515
 516 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 517         .initial_config = intel_fb_initial_config,
 518         .gamma_set = intel_crtc_fb_gamma_set,
 519         .gamma_get = intel_crtc_fb_gamma_get,
 520         .fb_probe = intelfb_create,
 521 };
 522
 523 static void intel_fbdev_destroy(struct drm_device *dev,
 524                                 struct intel_fbdev *ifbdev)
 525 {
 526
 527         drm_fb_helper_unregister_fbi(&ifbdev->helper);
 528         drm_fb_helper_release_fbi(&ifbdev->helper);
 529
 530         drm_fb_helper_fini(&ifbdev->helper);
 531
 532         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 533         drm_framebuffer_remove(&ifbdev->fb->base);
 534 }
 535
 536 /*
 537  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 538  * The core display code will have read out the current plane configuration,
 539  * so we use that to figure out if there's an object for us to use as the
 540  * fb, and if so, we re-use it for the fbdev configuration.
 541  *
 542  * Note we only support a single fb shared across pipes for boot (mostly for
 543  * fbcon), so we just find the biggest and use that.
 544  */
 545 static bool intel_fbdev_init_bios(struct drm_device *dev,
 546                                  struct intel_fbdev *ifbdev)
 547 {
 548         struct intel_framebuffer *fb = NULL;
 549         struct drm_crtc *crtc;
 550         struct intel_crtc *intel_crtc;
 551         unsigned int max_size = 0;
 552
 553         /* Find the largest fb */
 554         for_each_crtc(dev, crtc) {
 555                 struct drm_i915_gem_object *obj =
 556                         intel_fb_obj(crtc->primary->state->fb);
 557                 intel_crtc = to_intel_crtc(crtc);
 558
 559                 if (!crtc->state->active || !obj) {
 560                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 561                                       pipe_name(intel_crtc->pipe));
 562                         continue;
 563                 }
 564
 565                 if (obj->base.size > max_size) {
 566                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 567                                       pipe_name(intel_crtc->pipe));
 568                         fb = to_intel_framebuffer(crtc->primary->state->fb);
 569                         max_size = obj->base.size;
 570                 }
 571         }
 572
 573         if (!fb) {
 574                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 575                 goto out;
 576         }
 577
 578         /* Now make sure all the pipes will fit into it */
 579         for_each_crtc(dev, crtc) {
 580                 unsigned int cur_size;
 581
 582                 intel_crtc = to_intel_crtc(crtc);
 583
 584                 if (!crtc->state->active) {
 585                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 586                                       pipe_name(intel_crtc->pipe));
 587                         continue;
 588                 }
 589
 590                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 591                               pipe_name(intel_crtc->pipe));
 592
 593                 /*
 594                  * See if the plane fb we found above will fit on this
 595                  * pipe.  Note we need to use the selected fb's pitch and bpp
 596                  * rather than the current pipe's, since they differ.
 597                  */
 598                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 599                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 600                 if (fb->base.pitches[0] < cur_size) {
 601                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 602                                       pipe_name(intel_crtc->pipe),
 603                                       cur_size, fb->base.pitches[0]);
 604                         fb = NULL;
 605                         break;
 606                 }
 607
 608                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 609                 cur_size = intel_fb_align_height(dev, cur_size,
 610                                                  fb->base.pixel_format,
 611                                                  fb->base.modifier[0]);
 612                 cur_size *= fb->base.pitches[0];
 613                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 614                               pipe_name(intel_crtc->pipe),
 615                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 616                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 617                               fb->base.bits_per_pixel,
 618                               cur_size);
 619
 620                 if (cur_size > max_size) {
 621                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 622                                       pipe_name(intel_crtc->pipe),
 623                                       cur_size, max_size);
 624                         fb = NULL;
 625                         break;
 626                 }
 627
 628                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 629                               pipe_name(intel_crtc->pipe),
 630                               max_size, cur_size);
 631         }
 632
 633         if (!fb) {
 634                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 635                 goto out;
 636         }
 637
 638         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 639         ifbdev->fb = fb;
 640
 641         drm_framebuffer_reference(&ifbdev->fb->base);
 642
 643         /* Final pass to check if any active pipes don't have fbs */
 644         for_each_crtc(dev, crtc) {
 645                 intel_crtc = to_intel_crtc(crtc);
 646
 647                 if (!crtc->state->active)
 648                         continue;
 649
 650                 WARN(!crtc->primary->fb,
 651                      "re-used BIOS config but lost an fb on crtc %d\n",
 652                      crtc->base.id);
 653         }
 654
 655
 656         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 657         return true;
 658
 659 out:
 660
 661         return false;
 662 }
 663
 664 static void intel_fbdev_suspend_worker(struct work_struct *work)
 665 {
 666         intel_fbdev_set_suspend(container_of(work,
 667                                              struct drm_i915_private,
 668                                              fbdev_suspend_work)->dev,
 669                                 FBINFO_STATE_RUNNING,
 670                                 true);
 671 }
 672
 673 int intel_fbdev_init(struct drm_device *dev)
 674 {
 675         struct intel_fbdev *ifbdev;
 676         struct drm_i915_private *dev_priv = dev->dev_private;
 677         int ret;
 678
 679         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 680                 return -ENODEV;
 681
 682         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 683         if (ifbdev == NULL)
 684                 return -ENOMEM;
 685
 686         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 687
 688         if (!intel_fbdev_init_bios(dev, ifbdev))
 689                 ifbdev->preferred_bpp = 32;
 690
 691         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 692                                  INTEL_INFO(dev)->num_pipes, 4);
 693         if (ret) {
 694                 kfree(ifbdev);
 695                 return ret;
 696         }
 697
 698         ifbdev->helper.atomic = true;
 699
 700         dev_priv->fbdev = ifbdev;
 701         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 702
 703         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 704
 705         return 0;
 706 }
 707
 708 static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 709 {
 710         struct drm_i915_private *dev_priv = data;
 711         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 712
 713         /* Due to peculiar init order wrt to hpd handling this is separate. */
 714         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
 715 }
 716
 717 void intel_fbdev_initial_config_async(struct drm_device *dev)
 718 {
 719         async_schedule(intel_fbdev_initial_config, to_i915(dev));
 720 }
 721
 722 void intel_fbdev_fini(struct drm_device *dev)
 723 {
 724         struct drm_i915_private *dev_priv = dev->dev_private;
 725         if (!dev_priv->fbdev)
 726                 return;
 727
 728         flush_work(&dev_priv->fbdev_suspend_work);
 729
 730         async_synchronize_full();
 731         intel_fbdev_destroy(dev, dev_priv->fbdev);
 732         kfree(dev_priv->fbdev);
 733         dev_priv->fbdev = NULL;
 734 }
 735
 736 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 737 {
 738         struct drm_i915_private *dev_priv = dev->dev_private;
 739         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 740         struct fb_info *info;
 741
 742         if (!ifbdev)
 743                 return;
 744
 745         info = ifbdev->helper.fbdev;
 746
 747         if (synchronous) {
 748                 /* Flush any pending work to turn the console on, and then
 749                  * wait to turn it off. It must be synchronous as we are
 750                  * about to suspend or unload the driver.
 751                  *
 752                  * Note that from within the work-handler, we cannot flush
 753                  * ourselves, so only flush outstanding work upon suspend!
 754                  */
 755                 if (state != FBINFO_STATE_RUNNING)
 756                         flush_work(&dev_priv->fbdev_suspend_work);
 757                 console_lock();
 758         } else {
 759                 /*
 760                  * The console lock can be pretty contented on resume due
 761                  * to all the printk activity.  Try to keep it out of the hot
 762                  * path of resume if possible.
 763                  */
 764                 WARN_ON(state != FBINFO_STATE_RUNNING);
 765                 if (!console_trylock()) {
 766                         /* Don't block our own workqueue as this can
 767                          * be run in parallel with other i915.ko tasks.
 768                          */
 769                         schedule_work(&dev_priv->fbdev_suspend_work);
 770                         return;
 771                 }
 772         }
 773
 774         /* On resume from hibernation: If the object is shmemfs backed, it has
 775          * been restored from swap. If the object is stolen however, it will be
 776          * full of whatever garbage was left in there.
 777          */
 778         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 779                 memset_io(info->screen_base, 0, info->screen_size);
 780
 781         drm_fb_helper_set_suspend(&ifbdev->helper, state);
 782         console_unlock();
 783 }
 784
 785 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 786 {
 787         struct drm_i915_private *dev_priv = dev->dev_private;
 788         if (dev_priv->fbdev)
 789                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 790 }
 791
 792 void intel_fbdev_restore_mode(struct drm_device *dev)
 793 {
 794         int ret;
 795         struct drm_i915_private *dev_priv = dev->dev_private;
 796         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 797         struct drm_fb_helper *fb_helper;
 798
 799         if (!ifbdev)
 800                 return;
 801
 802         fb_helper = &ifbdev->helper;
 803
 804         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 805         if (ret) {
 806                 DRM_DEBUG("failed to restore crtc mode\n");
 807         } else {
 808                 mutex_lock(&fb_helper->dev->struct_mutex);
 809                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
 810                 mutex_unlock(&fb_helper->dev->struct_mutex);
 811         }
 812 }