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                 mutex_lock(&fb_helper->dev->struct_mutex);
  56                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  57                 mutex_unlock(&fb_helper->dev->struct_mutex);
  58         }
  59
  60         return ret;
  61 }
  62
  63 static int intel_fbdev_blank(int blank, struct fb_info *info)
  64 {
  65         struct drm_fb_helper *fb_helper = info->par;
  66         struct intel_fbdev *ifbdev =
  67                 container_of(fb_helper, struct intel_fbdev, helper);
  68         int ret;
  69
  70         ret = drm_fb_helper_blank(blank, info);
  71
  72         if (ret == 0) {
  73                 mutex_lock(&fb_helper->dev->struct_mutex);
  74                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  75                 mutex_unlock(&fb_helper->dev->struct_mutex);
  76         }
  77
  78         return ret;
  79 }
  80
  81 static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
  82                                    struct fb_info *info)
  83 {
  84         struct drm_fb_helper *fb_helper = info->par;
  85         struct intel_fbdev *ifbdev =
  86                 container_of(fb_helper, struct intel_fbdev, helper);
  87
  88         int ret;
  89         ret = drm_fb_helper_pan_display(var, info);
  90
  91         if (ret == 0) {
  92                 mutex_lock(&fb_helper->dev->struct_mutex);
  93                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
  94                 mutex_unlock(&fb_helper->dev->struct_mutex);
  95         }
  96
  97         return ret;
  98 }
  99
 100 static struct fb_ops intelfb_ops = {
 101         .owner = THIS_MODULE,
 102         .fb_check_var = drm_fb_helper_check_var,
 103         .fb_set_par = intel_fbdev_set_par,
 104         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 105         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 106         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 107         .fb_pan_display = intel_fbdev_pan_display,
 108         .fb_blank = intel_fbdev_blank,
 109         .fb_setcmap = drm_fb_helper_setcmap,
 110         .fb_debug_enter = drm_fb_helper_debug_enter,
 111         .fb_debug_leave = drm_fb_helper_debug_leave,
 112 };
 113 #endif
 114
 115 static int intelfb_alloc(struct drm_fb_helper *helper,
 116                          struct drm_fb_helper_surface_size *sizes)
 117 {
 118         struct intel_fbdev *ifbdev =
 119                 container_of(helper, struct intel_fbdev, helper);
 120         struct drm_framebuffer *fb;
 121         struct drm_device *dev = helper->dev;
 122         struct drm_i915_private *dev_priv = to_i915(dev);
 123         struct drm_mode_fb_cmd2 mode_cmd = {};
 124         struct drm_i915_gem_object *obj = NULL;
 125         int size, ret;
 126
 127         /* we don't do packed 24bpp */
 128         if (sizes->surface_bpp == 24)
 129                 sizes->surface_bpp = 32;
 130
 131         mode_cmd.width = sizes->surface_width;
 132         mode_cmd.height = sizes->surface_height;
 133
 134         mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
 135                                     DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
 136         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 137                                                           sizes->surface_depth);
 138
 139         size = mode_cmd.pitches[0] * mode_cmd.height;
 140         size = PAGE_ALIGN(size);
 141
 142         /* If the FB is too big, just don't use it since fbdev is not very
 143          * important and we should probably use that space with FBC or other
 144          * features. */
 145         if (size * 2 < dev_priv->gtt.stolen_usable_size)
 146                 obj = i915_gem_object_create_stolen(dev, size);
 147         if (obj == NULL)
 148                 obj = i915_gem_alloc_object(dev, size);
 149         if (!obj) {
 150                 DRM_ERROR("failed to allocate framebuffer\n");
 151                 ret = -ENOMEM;
 152                 goto out;
 153         }
 154
 155         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
 156         if (IS_ERR(fb)) {
 157                 ret = PTR_ERR(fb);
 158                 goto out_unref;
 159         }
 160
 161         /* Flush everything out, we'll be doing GTT only from now on */
 162         ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL, NULL);
 163         if (ret) {
 164                 DRM_ERROR("failed to pin obj: %d\n", ret);
 165                 goto out_fb;
 166         }
 167
 168         ifbdev->fb = to_intel_framebuffer(fb);
 169
 170         return 0;
 171
 172 out_fb:
 173         drm_framebuffer_remove(fb);
 174 out_unref:
 175         drm_gem_object_unreference(&obj->base);
 176 out:
 177         return ret;
 178 }
 179
 180 static int intelfb_create(struct drm_fb_helper *helper,
 181                           struct drm_fb_helper_surface_size *sizes)
 182 {
 183         struct intel_fbdev *ifbdev =
 184                 container_of(helper, struct intel_fbdev, helper);
 185         struct intel_framebuffer *intel_fb = ifbdev->fb;
 186         struct drm_device *dev = helper->dev;
 187         struct drm_i915_private *dev_priv = dev->dev_private;
 188         struct fb_info *info;
 189         struct drm_framebuffer *fb;
 190         struct drm_i915_gem_object *obj;
 191         device_t vga_dev;
 192         int size, ret;
 193         bool prealloc = false;
 194
 195         mutex_lock(&dev->struct_mutex);
 196
 197         if (intel_fb &&
 198             (sizes->fb_width > intel_fb->base.width ||
 199              sizes->fb_height > intel_fb->base.height)) {
 200                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
 201                               " releasing it\n",
 202                               intel_fb->base.width, intel_fb->base.height,
 203                               sizes->fb_width, sizes->fb_height);
 204                 drm_framebuffer_unreference(&intel_fb->base);
 205                 intel_fb = ifbdev->fb = NULL;
 206         }
 207         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
 208                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
 209                 ret = intelfb_alloc(helper, sizes);
 210                 if (ret)
 211                         goto out_unlock;
 212                 intel_fb = ifbdev->fb;
 213         } else {
 214                 DRM_DEBUG_KMS("re-using BIOS fb\n");
 215                 prealloc = true;
 216                 sizes->fb_width = intel_fb->base.width;
 217                 sizes->fb_height = intel_fb->base.height;
 218         }
 219
 220         obj = intel_fb->obj;
 221         size = obj->base.size;
 222
 223         info = drm_fb_helper_alloc_fbi(helper);
 224         if (IS_ERR(info)) {
 225                 ret = PTR_ERR(info);
 226                 goto out_unpin;
 227         }
 228
 229 #if 0
 230         info->par = helper;
 231 #endif
 232
 233         fb = &ifbdev->fb->base;
 234
 235         ifbdev->helper.fb = fb;
 236
 237 #ifdef __DragonFly__
 238         vga_dev = device_get_parent(dev->dev);
 239         info->width = sizes->fb_width;
 240         info->height = sizes->fb_height;
 241         info->stride = fb->pitches[0];
 242         info->depth = sizes->surface_bpp;
 243         info->paddr = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
 244         info->is_vga_boot_display = vga_pci_is_boot_display(vga_dev);
 245         info->vaddr =
 246             (vm_offset_t)pmap_mapdev_attr(info->paddr,
 247                 sizes->surface_height * info->stride,
 248                 VM_MEMATTR_WRITE_COMBINING);
 249 #else
 250         strcpy(info->fix.id, "inteldrmfb");
 251
 252         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 253         info->fbops = &intelfb_ops;
 254
 255         /* setup aperture base/size for vesafb takeover */
 256         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 257         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
 258
 259         info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
 260         info->fix.smem_len = size;
 261
 262         info->screen_base =
 263                 ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
 264                            size);
 265         if (!info->screen_base) {
 266                 ret = -ENOSPC;
 267                 goto out_destroy_fbi;
 268         }
 269         info->screen_size = size;
 270
 271         /* This driver doesn't need a VT switch to restore the mode on resume */
 272         info->skip_vt_switch = true;
 273
 274         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 275         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 276
 277         /* If the object is shmemfs backed, it will have given us zeroed pages.
 278          * If the object is stolen however, it will be full of whatever
 279          * garbage was left in there.
 280          */
 281         if (ifbdev->fb->obj->stolen && !prealloc)
 282                 memset_io(info->screen_base, 0, info->screen_size);
 283
 284         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 285 #endif
 286
 287         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
 288                       fb->width, fb->height,
 289                       i915_gem_obj_ggtt_offset(obj), obj);
 290
 291         mutex_unlock(&dev->struct_mutex);
 292 #if 0
 293         vga_switcheroo_client_fb_set(dev->pdev, info);
 294 #endif
 295         return 0;
 296
 297 #if 0
 298 out_destroy_fbi:
 299         drm_fb_helper_release_fbi(helper);
 300 #endif
 301 out_unpin:
 302         i915_gem_object_ggtt_unpin(obj);
 303         drm_gem_object_unreference(&obj->base);
 304 out_unlock:
 305         mutex_unlock(&dev->struct_mutex);
 306         return ret;
 307 }
 308
 309 /** Sets the color ramps on behalf of RandR */
 310 static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 311                                     u16 blue, int regno)
 312 {
 313         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 314
 315         intel_crtc->lut_r[regno] = red >> 8;
 316         intel_crtc->lut_g[regno] = green >> 8;
 317         intel_crtc->lut_b[regno] = blue >> 8;
 318 }
 319
 320 static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 321                                     u16 *blue, int regno)
 322 {
 323         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 324
 325         *red = intel_crtc->lut_r[regno] << 8;
 326         *green = intel_crtc->lut_g[regno] << 8;
 327         *blue = intel_crtc->lut_b[regno] << 8;
 328 }
 329
 330 static struct drm_fb_helper_crtc *
 331 intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
 332 {
 333         int i;
 334
 335         for (i = 0; i < fb_helper->crtc_count; i++)
 336                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
 337                         return &fb_helper->crtc_info[i];
 338
 339         return NULL;
 340 }
 341
 342 /*
 343  * Try to read the BIOS display configuration and use it for the initial
 344  * fb configuration.
 345  *
 346  * The BIOS or boot loader will generally create an initial display
 347  * configuration for us that includes some set of active pipes and displays.
 348  * This routine tries to figure out which pipes and connectors are active
 349  * and stuffs them into the crtcs and modes array given to us by the
 350  * drm_fb_helper code.
 351  *
 352  * The overall sequence is:
 353  *   intel_fbdev_init - from driver load
 354  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
 355  *     drm_fb_helper_init - build fb helper structs
 356  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
 357  *   intel_fbdev_initial_config - apply the config
 358  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
 359  *         drm_setup_crtcs - build crtc config for fbdev
 360  *           intel_fb_initial_config - find active connectors etc
 361  *         drm_fb_helper_single_fb_probe - set up fbdev
 362  *           intelfb_create - re-use or alloc fb, build out fbdev structs
 363  *
 364  * Note that we don't make special consideration whether we could actually
 365  * switch to the selected modes without a full modeset. E.g. when the display
 366  * is in VGA mode we need to recalculate watermarks and set a new high-res
 367  * framebuffer anyway.
 368  */
 369 static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
 370                                     struct drm_fb_helper_crtc **crtcs,
 371                                     struct drm_display_mode **modes,
 372                                     struct drm_fb_offset *offsets,
 373                                     bool *enabled, int width, int height)
 374 {
 375         struct drm_device *dev = fb_helper->dev;
 376         int i, j;
 377         bool *save_enabled;
 378         bool fallback = true;
 379         int num_connectors_enabled = 0;
 380         int num_connectors_detected = 0;
 381         uint64_t conn_configured = 0, mask;
 382         int pass = 0;
 383
 384         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
 385                                GFP_KERNEL);
 386         if (!save_enabled)
 387                 return false;
 388
 389         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
 390         mask = (1 << fb_helper->connector_count) - 1;
 391 retry:
 392         for (i = 0; i < fb_helper->connector_count; i++) {
 393                 struct drm_fb_helper_connector *fb_conn;
 394                 struct drm_connector *connector;
 395                 struct drm_encoder *encoder;
 396                 struct drm_fb_helper_crtc *new_crtc;
 397
 398                 fb_conn = fb_helper->connector_info[i];
 399                 connector = fb_conn->connector;
 400
 401                 if (conn_configured & (1 << i))
 402                         continue;
 403
 404                 if (pass == 0 && !connector->has_tile)
 405                         continue;
 406
 407                 if (connector->status == connector_status_connected)
 408                         num_connectors_detected++;
 409
 410                 if (!enabled[i]) {
 411                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
 412                                       connector->name);
 413                         conn_configured |= (1 << i);
 414                         continue;
 415                 }
 416
 417                 if (connector->force == DRM_FORCE_OFF) {
 418                         DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
 419                                       connector->name);
 420                         enabled[i] = false;
 421                         continue;
 422                 }
 423
 424                 encoder = connector->encoder;
 425                 if (!encoder || WARN_ON(!encoder->crtc)) {
 426                         if (connector->force > DRM_FORCE_OFF)
 427                                 goto bail;
 428
 429                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
 430                                       connector->name);
 431                         enabled[i] = false;
 432                         conn_configured |= (1 << i);
 433                         continue;
 434                 }
 435
 436                 num_connectors_enabled++;
 437
 438                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
 439
 440                 /*
 441                  * Make sure we're not trying to drive multiple connectors
 442                  * with a single CRTC, since our cloning support may not
 443                  * match the BIOS.
 444                  */
 445                 for (j = 0; j < fb_helper->connector_count; j++) {
 446                         if (crtcs[j] == new_crtc) {
 447                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
 448                                 goto bail;
 449                         }
 450                 }
 451
 452                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
 453                               connector->name);
 454
 455                 /* go for command line mode first */
 456                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
 457
 458                 /* try for preferred next */
 459                 if (!modes[i]) {
 460                         DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
 461                                       connector->name, connector->has_tile);
 462                         modes[i] = drm_has_preferred_mode(fb_conn, width,
 463                                                           height);
 464                 }
 465
 466                 /* No preferred mode marked by the EDID? Are there any modes? */
 467                 if (!modes[i] && !list_empty(&connector->modes)) {
 468                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
 469                                       connector->name);
 470                         modes[i] = list_first_entry(&connector->modes,
 471                                                     struct drm_display_mode,
 472                                                     head);
 473                 }
 474
 475                 /* last resort: use current mode */
 476                 if (!modes[i]) {
 477                         /*
 478                          * IMPORTANT: We want to use the adjusted mode (i.e.
 479                          * after the panel fitter upscaling) as the initial
 480                          * config, not the input mode, which is what crtc->mode
 481                          * usually contains. But since our current
 482                          * code puts a mode derived from the post-pfit timings
 483                          * into crtc->mode this works out correctly.
 484                          */
 485                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
 486                                       connector->name);
 487                         modes[i] = &encoder->crtc->mode;
 488                 }
 489                 crtcs[i] = new_crtc;
 490
 491                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
 492                               connector->name,
 493                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
 494                               encoder->crtc->base.id,
 495                               modes[i]->hdisplay, modes[i]->vdisplay,
 496                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
 497
 498                 fallback = false;
 499                 conn_configured |= (1 << i);
 500         }
 501
 502         if ((conn_configured & mask) != mask) {
 503                 pass++;
 504                 goto retry;
 505         }
 506
 507         /*
 508          * If the BIOS didn't enable everything it could, fall back to have the
 509          * same user experiencing of lighting up as much as possible like the
 510          * fbdev helper library.
 511          */
 512         if (num_connectors_enabled != num_connectors_detected &&
 513             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
 514                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
 515                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
 516                               num_connectors_detected);
 517                 fallback = true;
 518         }
 519
 520         if (fallback) {
 521 bail:
 522                 DRM_DEBUG_KMS("Not using firmware configuration\n");
 523                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
 524                 kfree(save_enabled);
 525                 return false;
 526         }
 527
 528         kfree(save_enabled);
 529         return true;
 530 }
 531
 532 static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 533         .initial_config = intel_fb_initial_config,
 534         .gamma_set = intel_crtc_fb_gamma_set,
 535         .gamma_get = intel_crtc_fb_gamma_get,
 536         .fb_probe = intelfb_create,
 537 };
 538
 539 static void intel_fbdev_destroy(struct drm_device *dev,
 540                                 struct intel_fbdev *ifbdev)
 541 {
 542 #if 0
 543         drm_fb_helper_unregister_fbi(&ifbdev->helper);
 544         drm_fb_helper_release_fbi(&ifbdev->helper);
 545 #endif
 546
 547         drm_fb_helper_fini(&ifbdev->helper);
 548
 549         drm_framebuffer_unregister_private(&ifbdev->fb->base);
 550         drm_framebuffer_remove(&ifbdev->fb->base);
 551 }
 552
 553 /*
 554  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
 555  * The core display code will have read out the current plane configuration,
 556  * so we use that to figure out if there's an object for us to use as the
 557  * fb, and if so, we re-use it for the fbdev configuration.
 558  *
 559  * Note we only support a single fb shared across pipes for boot (mostly for
 560  * fbcon), so we just find the biggest and use that.
 561  */
 562 static bool intel_fbdev_init_bios(struct drm_device *dev,
 563                                  struct intel_fbdev *ifbdev)
 564 {
 565         struct intel_framebuffer *fb = NULL;
 566         struct drm_crtc *crtc;
 567         struct intel_crtc *intel_crtc;
 568         unsigned int max_size = 0;
 569
 570         /* Find the largest fb */
 571         for_each_crtc(dev, crtc) {
 572                 struct drm_i915_gem_object *obj =
 573                         intel_fb_obj(crtc->primary->state->fb);
 574                 intel_crtc = to_intel_crtc(crtc);
 575
 576                 if (!crtc->state->active || !obj) {
 577                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
 578                                       pipe_name(intel_crtc->pipe));
 579                         continue;
 580                 }
 581
 582                 if (obj->base.size > max_size) {
 583                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
 584                                       pipe_name(intel_crtc->pipe));
 585                         fb = to_intel_framebuffer(crtc->primary->state->fb);
 586                         max_size = obj->base.size;
 587                 }
 588         }
 589
 590         if (!fb) {
 591                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
 592                 goto out;
 593         }
 594
 595         /* Now make sure all the pipes will fit into it */
 596         for_each_crtc(dev, crtc) {
 597                 unsigned int cur_size;
 598
 599                 intel_crtc = to_intel_crtc(crtc);
 600
 601                 if (!crtc->state->active) {
 602                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
 603                                       pipe_name(intel_crtc->pipe));
 604                         continue;
 605                 }
 606
 607                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
 608                               pipe_name(intel_crtc->pipe));
 609
 610                 /*
 611                  * See if the plane fb we found above will fit on this
 612                  * pipe.  Note we need to use the selected fb's pitch and bpp
 613                  * rather than the current pipe's, since they differ.
 614                  */
 615                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
 616                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
 617                 if (fb->base.pitches[0] < cur_size) {
 618                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
 619                                       pipe_name(intel_crtc->pipe),
 620                                       cur_size, fb->base.pitches[0]);
 621                         fb = NULL;
 622                         break;
 623                 }
 624
 625                 cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
 626                 cur_size = intel_fb_align_height(dev, cur_size,
 627                                                  fb->base.pixel_format,
 628                                                  fb->base.modifier[0]);
 629                 cur_size *= fb->base.pitches[0];
 630                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
 631                               pipe_name(intel_crtc->pipe),
 632                               intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
 633                               intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
 634                               fb->base.bits_per_pixel,
 635                               cur_size);
 636
 637                 if (cur_size > max_size) {
 638                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
 639                                       pipe_name(intel_crtc->pipe),
 640                                       cur_size, max_size);
 641                         fb = NULL;
 642                         break;
 643                 }
 644
 645                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
 646                               pipe_name(intel_crtc->pipe),
 647                               max_size, cur_size);
 648         }
 649
 650         if (!fb) {
 651                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
 652                 goto out;
 653         }
 654
 655         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
 656         ifbdev->fb = fb;
 657
 658         drm_framebuffer_reference(&ifbdev->fb->base);
 659
 660         /* Final pass to check if any active pipes don't have fbs */
 661         for_each_crtc(dev, crtc) {
 662                 intel_crtc = to_intel_crtc(crtc);
 663
 664                 if (!crtc->state->active)
 665                         continue;
 666
 667                 WARN(!crtc->primary->fb,
 668                      "re-used BIOS config but lost an fb on crtc %d\n",
 669                      crtc->base.id);
 670         }
 671
 672
 673         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
 674         return true;
 675
 676 out:
 677
 678         return false;
 679 }
 680
 681 static void intel_fbdev_suspend_worker(struct work_struct *work)
 682 {
 683         intel_fbdev_set_suspend(container_of(work,
 684                                              struct drm_i915_private,
 685                                              fbdev_suspend_work)->dev,
 686                                 FBINFO_STATE_RUNNING,
 687                                 true);
 688 }
 689
 690 int intel_fbdev_init(struct drm_device *dev)
 691 {
 692         struct intel_fbdev *ifbdev;
 693         struct drm_i915_private *dev_priv = dev->dev_private;
 694         int ret;
 695
 696         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
 697                 return -ENODEV;
 698
 699         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 700         if (ifbdev == NULL)
 701                 return -ENOMEM;
 702
 703         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
 704
 705         if (!intel_fbdev_init_bios(dev, ifbdev))
 706                 ifbdev->preferred_bpp = 32;
 707
 708         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 709                                  INTEL_INFO(dev)->num_pipes, 4);
 710         if (ret) {
 711                 kfree(ifbdev);
 712                 return ret;
 713         }
 714
 715         ifbdev->helper.atomic = true;
 716
 717         dev_priv->fbdev = ifbdev;
 718         INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
 719
 720         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 721
 722         return 0;
 723 }
 724
 725 void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
 726 {
 727         struct drm_i915_private *dev_priv = data;
 728         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 729
 730         /* Due to peculiar init order wrt to hpd handling this is separate. */
 731         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
 732 }
 733
 734 void intel_fbdev_fini(struct drm_device *dev)
 735 {
 736         struct drm_i915_private *dev_priv = dev->dev_private;
 737         if (!dev_priv->fbdev)
 738                 return;
 739
 740 #if 0
 741         flush_work(&dev_priv->fbdev_suspend_work);
 742 #endif
 743
 744         async_synchronize_full();
 745         intel_fbdev_destroy(dev, dev_priv->fbdev);
 746         kfree(dev_priv->fbdev);
 747         dev_priv->fbdev = NULL;
 748 }
 749
 750 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 751 {
 752 #if 0
 753         struct drm_i915_private *dev_priv = dev->dev_private;
 754         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 755         struct fb_info *info;
 756
 757         if (!ifbdev)
 758                 return;
 759
 760         info = ifbdev->helper.fbdev;
 761
 762         if (synchronous) {
 763                 /* Flush any pending work to turn the console on, and then
 764                  * wait to turn it off. It must be synchronous as we are
 765                  * about to suspend or unload the driver.
 766                  *
 767                  * Note that from within the work-handler, we cannot flush
 768                  * ourselves, so only flush outstanding work upon suspend!
 769                  */
 770                 if (state != FBINFO_STATE_RUNNING)
 771                         flush_work(&dev_priv->fbdev_suspend_work);
 772                 console_lock();
 773         } else {
 774                 /*
 775                  * The console lock can be pretty contented on resume due
 776                  * to all the printk activity.  Try to keep it out of the hot
 777                  * path of resume if possible.
 778                  */
 779                 WARN_ON(state != FBINFO_STATE_RUNNING);
 780                 if (!console_trylock()) {
 781                         /* Don't block our own workqueue as this can
 782                          * be run in parallel with other i915.ko tasks.
 783                          */
 784                         schedule_work(&dev_priv->fbdev_suspend_work);
 785                         return;
 786                 }
 787         }
 788
 789         /* On resume from hibernation: If the object is shmemfs backed, it has
 790          * been restored from swap. If the object is stolen however, it will be
 791          * full of whatever garbage was left in there.
 792          */
 793         if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
 794                 memset_io(info->screen_base, 0, info->screen_size);
 795
 796         drm_fb_helper_set_suspend(&ifbdev->helper, state);
 797         console_unlock();
 798 #endif
 799 }
 800
 801 void intel_fbdev_output_poll_changed(struct drm_device *dev)
 802 {
 803         struct drm_i915_private *dev_priv = dev->dev_private;
 804         if (dev_priv->fbdev)
 805                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 806 }
 807
 808 void intel_fbdev_restore_mode(struct drm_device *dev)
 809 {
 810         int ret;
 811         struct drm_i915_private *dev_priv = dev->dev_private;
 812         struct intel_fbdev *ifbdev = dev_priv->fbdev;
 813         struct drm_fb_helper *fb_helper;
 814
 815         if (!ifbdev)
 816                 return;
 817
 818         fb_helper = &ifbdev->helper;
 819
 820         /* XXX: avoid dead-locking the Xorg on exit */
 821         if (mutex_is_locked(&dev->mode_config.mutex)) {
 822                 DRM_ERROR("fubar while trying to restore kms_console\n");
 823                 return; /* drm_modeset_unlock_all(dev) ? */
 824         }
 825
 826         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 827         if (ret) {
 828                 DRM_DEBUG("failed to restore crtc mode\n");
 829         } else {
 830                 mutex_lock(&fb_helper->dev->struct_mutex);
 831                 intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
 832                 mutex_unlock(&fb_helper->dev->struct_mutex);
 833         }
 834 }