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  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/module.h>
  28. #include <linux/kernel.h>
  29. #include <linux/errno.h>
  30. #include <linux/string.h>
  31. //#include <linux/mm.h>
  32. //#include <linux/tty.h>
  33. #include <linux/sysrq.h>
  34. //#include <linux/delay.h>
  35. #include <linux/fb.h>
  36. //#include <linux/init.h>
  37. //#include <linux/vga_switcheroo.h>
  38.  
  39. #include <drm/drmP.h>
  40. #include <drm/drm_crtc.h>
  41. #include <drm/drm_fb_helper.h>
  42. #include "intel_drv.h"
  43. #include <drm/i915_drm.h>
  44. #include "i915_drv.h"
  45.  
  46.  
  47. struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
  48. {
  49. #define BYTES_PER_LONG (BITS_PER_LONG/8)
  50. #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
  51.     int fb_info_size = sizeof(struct fb_info);
  52.     struct fb_info *info;
  53.     char *p;
  54.  
  55.     if (size)
  56.         fb_info_size += PADDING;
  57.  
  58.     p = kzalloc(fb_info_size + size, GFP_KERNEL);
  59.  
  60.     if (!p)
  61.         return NULL;
  62.  
  63.     info = (struct fb_info *) p;
  64.  
  65.     if (size)
  66.         info->par = p + fb_info_size;
  67.  
  68.     return info;
  69. #undef PADDING
  70. #undef BYTES_PER_LONG
  71. }
  72.  
  73.  
  74. static struct fb_ops intelfb_ops = {
  75.         .owner = THIS_MODULE,
  76.         .fb_check_var = drm_fb_helper_check_var,
  77.         .fb_set_par = drm_fb_helper_set_par,
  78. //   .fb_fillrect = cfb_fillrect,
  79. //   .fb_copyarea = cfb_copyarea,
  80. //   .fb_imageblit = cfb_imageblit,
  81. //   .fb_pan_display = drm_fb_helper_pan_display,
  82.         .fb_blank = drm_fb_helper_blank,
  83. //   .fb_setcmap = drm_fb_helper_setcmap,
  84. //   .fb_debug_enter = drm_fb_helper_debug_enter,
  85. //   .fb_debug_leave = drm_fb_helper_debug_leave,
  86. };
  87.  
  88. static int intelfb_alloc(struct drm_fb_helper *helper,
  89.                           struct drm_fb_helper_surface_size *sizes)
  90. {
  91.         struct intel_fbdev *ifbdev =
  92.                 container_of(helper, struct intel_fbdev, helper);
  93.         struct drm_framebuffer *fb;
  94.         struct drm_device *dev = helper->dev;
  95.         struct drm_mode_fb_cmd2 mode_cmd = {};
  96.         struct drm_i915_gem_object *obj;
  97.         int size, ret;
  98.  
  99.         /* we don't do packed 24bpp */
  100.         if (sizes->surface_bpp == 24)
  101.                 sizes->surface_bpp = 32;
  102.  
  103.         mode_cmd.width = sizes->surface_width;
  104.         mode_cmd.height = sizes->surface_height;
  105.  
  106.         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((sizes->surface_bpp + 7) /
  107.                               8), 512);
  108.         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
  109.                                                           sizes->surface_depth);
  110.  
  111.         size = mode_cmd.pitches[0] * mode_cmd.height;
  112.         size = ALIGN(size, PAGE_SIZE);
  113.         obj = main_fb_obj;
  114.         if (!obj) {
  115.                 DRM_ERROR("failed to allocate framebuffer\n");
  116.                 ret = -ENOMEM;
  117.                 goto out;
  118.         }
  119.     obj->stride = mode_cmd.pitches[0];
  120.  
  121.         /* Flush everything out, we'll be doing GTT only from now on */
  122.         ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
  123.         if (ret) {
  124.                 DRM_ERROR("failed to pin obj: %d\n", ret);
  125.                 goto out_unref;
  126.         }
  127.  
  128.         fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
  129.         if (IS_ERR(fb)) {
  130.                 ret = PTR_ERR(fb);
  131.                 goto out_unpin;
  132.         }
  133.  
  134.         ifbdev->fb = to_intel_framebuffer(fb);
  135.  
  136.         return 0;
  137.  
  138. out_unpin:
  139.         i915_gem_object_ggtt_unpin(obj);
  140. out_unref:
  141.         drm_gem_object_unreference(&obj->base);
  142. out:
  143.         return ret;
  144. }
  145.  
  146. static int intelfb_create(struct drm_fb_helper *helper,
  147.                           struct drm_fb_helper_surface_size *sizes)
  148. {
  149.         struct intel_fbdev *ifbdev =
  150.                 container_of(helper, struct intel_fbdev, helper);
  151.         struct intel_framebuffer *intel_fb = ifbdev->fb;
  152.         struct drm_device *dev = helper->dev;
  153.         struct drm_i915_private *dev_priv = dev->dev_private;
  154.         struct fb_info *info;
  155.         struct drm_framebuffer *fb;
  156.         struct drm_i915_gem_object *obj;
  157.         int size, ret;
  158.         bool prealloc = false;
  159.  
  160.         mutex_lock(&dev->struct_mutex);
  161.  
  162.         if (intel_fb &&
  163.             (sizes->fb_width > intel_fb->base.width ||
  164.              sizes->fb_height > intel_fb->base.height)) {
  165.                 DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
  166.                               " releasing it\n",
  167.                               intel_fb->base.width, intel_fb->base.height,
  168.                               sizes->fb_width, sizes->fb_height);
  169.                 drm_framebuffer_unreference(&intel_fb->base);
  170.                 intel_fb = ifbdev->fb = NULL;
  171.         }
  172.         if (!intel_fb || WARN_ON(!intel_fb->obj)) {
  173.                 DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
  174.                 ret = intelfb_alloc(helper, sizes);
  175.                 if (ret)
  176.                         goto out_unlock;
  177.                 intel_fb = ifbdev->fb;
  178.         } else {
  179.                 DRM_DEBUG_KMS("re-using BIOS fb\n");
  180.                 prealloc = true;
  181.                 sizes->fb_width = intel_fb->base.width;
  182.                 sizes->fb_height = intel_fb->base.height;
  183.         }
  184.  
  185.         obj = intel_fb->obj;
  186.         size = obj->base.size;
  187.  
  188.         info = framebuffer_alloc(0, &dev->pdev->dev);
  189.         if (!info) {
  190.                 ret = -ENOMEM;
  191.                 goto out_unpin;
  192.         }
  193.  
  194.         info->par = helper;
  195.  
  196.         fb = &ifbdev->fb->base;
  197.  
  198.         ifbdev->helper.fb = fb;
  199.         ifbdev->helper.fbdev = info;
  200.  
  201.     strcpy(info->fix.id, "inteldrmfb");
  202.  
  203.     info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
  204.     info->fbops = &intelfb_ops;
  205.  
  206.     /* setup aperture base/size for vesafb takeover */
  207.         info->apertures = alloc_apertures(1);
  208.         if (!info->apertures) {
  209.                 ret = -ENOMEM;
  210.                 goto out_unpin;
  211.         }
  212.         info->apertures->ranges[0].base = dev->mode_config.fb_base;
  213.         info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
  214.  
  215.  
  216.         info->screen_base = (void*) 0xFE000000;
  217.         info->screen_size = size;
  218.  
  219.         /* This driver doesn't need a VT switch to restore the mode on resume */
  220.         info->skip_vt_switch = true;
  221.  
  222.         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
  223.         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
  224.  
  225.         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
  226.  
  227.         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
  228.                       fb->width, fb->height,
  229.                       i915_gem_obj_ggtt_offset(obj), obj);
  230.  
  231.         mutex_unlock(&dev->struct_mutex);
  232.         return 0;
  233.  
  234. out_unpin:
  235.         i915_gem_object_ggtt_unpin(obj);
  236.         drm_gem_object_unreference(&obj->base);
  237. out_unlock:
  238.         mutex_unlock(&dev->struct_mutex);
  239.         return ret;
  240. }
  241.  
  242. /** Sets the color ramps on behalf of RandR */
  243. static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
  244.                                     u16 blue, int regno)
  245. {
  246.         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  247.  
  248.         intel_crtc->lut_r[regno] = red >> 8;
  249.         intel_crtc->lut_g[regno] = green >> 8;
  250.         intel_crtc->lut_b[regno] = blue >> 8;
  251. }
  252.  
  253. static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
  254.                                     u16 *blue, int regno)
  255. {
  256.         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  257.  
  258.         *red = intel_crtc->lut_r[regno] << 8;
  259.         *green = intel_crtc->lut_g[regno] << 8;
  260.         *blue = intel_crtc->lut_b[regno] << 8;
  261. }
  262.  
  263. static struct drm_fb_helper_crtc *
  264. intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
  265. {
  266.         int i;
  267.  
  268.         for (i = 0; i < fb_helper->crtc_count; i++)
  269.                 if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
  270.                         return &fb_helper->crtc_info[i];
  271.  
  272.         return NULL;
  273. }
  274.  
  275. /*
  276.  * Try to read the BIOS display configuration and use it for the initial
  277.  * fb configuration.
  278.  *
  279.  * The BIOS or boot loader will generally create an initial display
  280.  * configuration for us that includes some set of active pipes and displays.
  281.  * This routine tries to figure out which pipes and connectors are active
  282.  * and stuffs them into the crtcs and modes array given to us by the
  283.  * drm_fb_helper code.
  284.  *
  285.  * The overall sequence is:
  286.  *   intel_fbdev_init - from driver load
  287.  *     intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
  288.  *     drm_fb_helper_init - build fb helper structs
  289.  *     drm_fb_helper_single_add_all_connectors - more fb helper structs
  290.  *   intel_fbdev_initial_config - apply the config
  291.  *     drm_fb_helper_initial_config - call ->probe then register_framebuffer()
  292.  *         drm_setup_crtcs - build crtc config for fbdev
  293.  *           intel_fb_initial_config - find active connectors etc
  294.  *         drm_fb_helper_single_fb_probe - set up fbdev
  295.  *           intelfb_create - re-use or alloc fb, build out fbdev structs
  296.  *
  297.  * Note that we don't make special consideration whether we could actually
  298.  * switch to the selected modes without a full modeset. E.g. when the display
  299.  * is in VGA mode we need to recalculate watermarks and set a new high-res
  300.  * framebuffer anyway.
  301.  */
  302. static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
  303.                                     struct drm_fb_helper_crtc **crtcs,
  304.                                     struct drm_display_mode **modes,
  305.                                     bool *enabled, int width, int height)
  306. {
  307.         struct drm_device *dev = fb_helper->dev;
  308.         int i, j;
  309.         bool *save_enabled;
  310.         bool fallback = true;
  311.         int num_connectors_enabled = 0;
  312.         int num_connectors_detected = 0;
  313.  
  314.         /*
  315.          * If the user specified any force options, just bail here
  316.          * and use that config.
  317.          */
  318.         for (i = 0; i < fb_helper->connector_count; i++) {
  319.                 struct drm_fb_helper_connector *fb_conn;
  320.                 struct drm_connector *connector;
  321.  
  322.                 fb_conn = fb_helper->connector_info[i];
  323.                 connector = fb_conn->connector;
  324.  
  325.                 if (!enabled[i])
  326.                         continue;
  327.  
  328.                 if (connector->force != DRM_FORCE_UNSPECIFIED)
  329.                         return false;
  330.         }
  331.  
  332.         save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
  333.                                GFP_KERNEL);
  334.         if (!save_enabled)
  335.                 return false;
  336.  
  337.         memcpy(save_enabled, enabled, dev->mode_config.num_connector);
  338.  
  339.         for (i = 0; i < fb_helper->connector_count; i++) {
  340.                 struct drm_fb_helper_connector *fb_conn;
  341.                 struct drm_connector *connector;
  342.                 struct drm_encoder *encoder;
  343.                 struct drm_fb_helper_crtc *new_crtc;
  344.  
  345.                 fb_conn = fb_helper->connector_info[i];
  346.                 connector = fb_conn->connector;
  347.  
  348.                 if (connector->status == connector_status_connected)
  349.                         num_connectors_detected++;
  350.  
  351.                 if (!enabled[i]) {
  352.                         DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
  353.                                       connector->name);
  354.                         continue;
  355.                 }
  356.  
  357.                 encoder = connector->encoder;
  358.                 if (!encoder || WARN_ON(!encoder->crtc)) {
  359.                         DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
  360.                                       connector->name);
  361.                         enabled[i] = false;
  362.                         continue;
  363.                 }
  364.  
  365.                 num_connectors_enabled++;
  366.  
  367.                 new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
  368.  
  369.                 /*
  370.                  * Make sure we're not trying to drive multiple connectors
  371.                  * with a single CRTC, since our cloning support may not
  372.                  * match the BIOS.
  373.                  */
  374.                 for (j = 0; j < fb_helper->connector_count; j++) {
  375.                         if (crtcs[j] == new_crtc) {
  376.                                 DRM_DEBUG_KMS("fallback: cloned configuration\n");
  377.                                 fallback = true;
  378.                                 goto out;
  379.                         }
  380.                 }
  381.  
  382.                 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
  383.                               connector->name);
  384.  
  385.                 /* go for command line mode first */
  386.                 modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
  387.  
  388.                 /* try for preferred next */
  389.                 if (!modes[i]) {
  390.                         DRM_DEBUG_KMS("looking for preferred mode on connector %s\n",
  391.                                       connector->name);
  392.                         modes[i] = drm_has_preferred_mode(fb_conn, width,
  393.                                                           height);
  394.                 }
  395.  
  396.                 /* No preferred mode marked by the EDID? Are there any modes? */
  397.                 if (!modes[i] && !list_empty(&connector->modes)) {
  398.                         DRM_DEBUG_KMS("using first mode listed on connector %s\n",
  399.                                       connector->name);
  400.                         modes[i] = list_first_entry(&connector->modes,
  401.                                                     struct drm_display_mode,
  402.                                                     head);
  403.                 }
  404.  
  405.                 /* last resort: use current mode */
  406.                 if (!modes[i]) {
  407.                         /*
  408.                          * IMPORTANT: We want to use the adjusted mode (i.e.
  409.                          * after the panel fitter upscaling) as the initial
  410.                          * config, not the input mode, which is what crtc->mode
  411.                          * usually contains. But since our current fastboot
  412.                          * code puts a mode derived from the post-pfit timings
  413.                          * into crtc->mode this works out correctly. We don't
  414.                          * use hwmode anywhere right now, so use it for this
  415.                          * since the fb helper layer wants a pointer to
  416.                          * something we own.
  417.                          */
  418.                         DRM_DEBUG_KMS("looking for current mode on connector %s\n",
  419.                                       connector->name);
  420.                         intel_mode_from_pipe_config(&encoder->crtc->hwmode,
  421.                                                     &to_intel_crtc(encoder->crtc)->config);
  422.                         modes[i] = &encoder->crtc->hwmode;
  423.                 }
  424.                 crtcs[i] = new_crtc;
  425.  
  426.                 DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
  427.                               connector->name,
  428.                               pipe_name(to_intel_crtc(encoder->crtc)->pipe),
  429.                               encoder->crtc->base.id,
  430.                               modes[i]->hdisplay, modes[i]->vdisplay,
  431.                               modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
  432.  
  433.                 fallback = false;
  434.         }
  435.  
  436.         /*
  437.          * If the BIOS didn't enable everything it could, fall back to have the
  438.          * same user experiencing of lighting up as much as possible like the
  439.          * fbdev helper library.
  440.          */
  441.         if (num_connectors_enabled != num_connectors_detected &&
  442.             num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
  443.                 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
  444.                 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
  445.                               num_connectors_detected);
  446.                 fallback = true;
  447.         }
  448.  
  449. out:
  450.         if (fallback) {
  451.                 DRM_DEBUG_KMS("Not using firmware configuration\n");
  452.                 memcpy(enabled, save_enabled, dev->mode_config.num_connector);
  453.                 kfree(save_enabled);
  454.                 return false;
  455.         }
  456.  
  457.         kfree(save_enabled);
  458.         return true;
  459. }
  460.  
  461. static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
  462.         .initial_config = intel_fb_initial_config,
  463.         .gamma_set = intel_crtc_fb_gamma_set,
  464.         .gamma_get = intel_crtc_fb_gamma_get,
  465.         .fb_probe = intelfb_create,
  466. };
  467.  
  468. /*
  469.  * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
  470.  * The core display code will have read out the current plane configuration,
  471.  * so we use that to figure out if there's an object for us to use as the
  472.  * fb, and if so, we re-use it for the fbdev configuration.
  473.  *
  474.  * Note we only support a single fb shared across pipes for boot (mostly for
  475.  * fbcon), so we just find the biggest and use that.
  476.  */
  477. static bool intel_fbdev_init_bios(struct drm_device *dev,
  478.                                  struct intel_fbdev *ifbdev)
  479. {
  480.         struct intel_framebuffer *fb = NULL;
  481.         struct drm_crtc *crtc;
  482.         struct intel_crtc *intel_crtc;
  483.         struct intel_plane_config *plane_config = NULL;
  484.         unsigned int max_size = 0;
  485.  
  486.         if (!i915.fastboot)
  487.                 return false;
  488.  
  489.         /* Find the largest fb */
  490.         for_each_crtc(dev, crtc) {
  491.                 intel_crtc = to_intel_crtc(crtc);
  492.  
  493.                 if (!intel_crtc->active || !crtc->primary->fb) {
  494.                         DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
  495.                                       pipe_name(intel_crtc->pipe));
  496.                         continue;
  497.                 }
  498.  
  499.                 if (intel_crtc->plane_config.size > max_size) {
  500.                         DRM_DEBUG_KMS("found possible fb from plane %c\n",
  501.                                       pipe_name(intel_crtc->pipe));
  502.                         plane_config = &intel_crtc->plane_config;
  503.                         fb = to_intel_framebuffer(crtc->primary->fb);
  504.                         max_size = plane_config->size;
  505.                 }
  506.         }
  507.  
  508.         if (!fb) {
  509.                 DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
  510.                 goto out;
  511.         }
  512.  
  513.         /* Now make sure all the pipes will fit into it */
  514.         for_each_crtc(dev, crtc) {
  515.                 unsigned int cur_size;
  516.  
  517.                 intel_crtc = to_intel_crtc(crtc);
  518.  
  519.                 if (!intel_crtc->active) {
  520.                         DRM_DEBUG_KMS("pipe %c not active, skipping\n",
  521.                                       pipe_name(intel_crtc->pipe));
  522.                         continue;
  523.                 }
  524.  
  525.                 DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
  526.                               pipe_name(intel_crtc->pipe));
  527.  
  528.                 /*
  529.                  * See if the plane fb we found above will fit on this
  530.                  * pipe.  Note we need to use the selected fb's pitch and bpp
  531.                  * rather than the current pipe's, since they differ.
  532.                  */
  533.                 cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
  534.                 cur_size = cur_size * fb->base.bits_per_pixel / 8;
  535.                 if (fb->base.pitches[0] < cur_size) {
  536.                         DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
  537.                                       pipe_name(intel_crtc->pipe),
  538.                                       cur_size, fb->base.pitches[0]);
  539.                         plane_config = NULL;
  540.                         fb = NULL;
  541.                         break;
  542.                 }
  543.  
  544.                 cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
  545.                 cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
  546.                 cur_size *= fb->base.pitches[0];
  547.                 DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
  548.                               pipe_name(intel_crtc->pipe),
  549.                               intel_crtc->config.adjusted_mode.crtc_hdisplay,
  550.                               intel_crtc->config.adjusted_mode.crtc_vdisplay,
  551.                               fb->base.bits_per_pixel,
  552.                               cur_size);
  553.  
  554.                 if (cur_size > max_size) {
  555.                         DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
  556.                                       pipe_name(intel_crtc->pipe),
  557.                                       cur_size, max_size);
  558.                         plane_config = NULL;
  559.                         fb = NULL;
  560.                         break;
  561.                 }
  562.  
  563.                 DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
  564.                               pipe_name(intel_crtc->pipe),
  565.                               max_size, cur_size);
  566.         }
  567.  
  568.         if (!fb) {
  569.                 DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
  570.                 goto out;
  571.         }
  572.  
  573.         ifbdev->preferred_bpp = fb->base.bits_per_pixel;
  574.         ifbdev->fb = fb;
  575.  
  576.         drm_framebuffer_reference(&ifbdev->fb->base);
  577.  
  578.         /* Final pass to check if any active pipes don't have fbs */
  579.         for_each_crtc(dev, crtc) {
  580.                 intel_crtc = to_intel_crtc(crtc);
  581.  
  582.                 if (!intel_crtc->active)
  583.                         continue;
  584.  
  585.                 WARN(!crtc->primary->fb,
  586.                      "re-used BIOS config but lost an fb on crtc %d\n",
  587.                      crtc->base.id);
  588.         }
  589.  
  590.  
  591.         DRM_DEBUG_KMS("using BIOS fb for initial console\n");
  592.         return true;
  593.  
  594. out:
  595.  
  596.         return false;
  597. }
  598.  
  599. int intel_fbdev_init(struct drm_device *dev)
  600. {
  601.         struct intel_fbdev *ifbdev;
  602.         struct drm_i915_private *dev_priv = dev->dev_private;
  603.         int ret;
  604.  
  605.         if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
  606.                 return -ENODEV;
  607.  
  608.         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
  609.         if (ifbdev == NULL)
  610.                 return -ENOMEM;
  611.  
  612.         drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
  613.  
  614.         if (!intel_fbdev_init_bios(dev, ifbdev))
  615.                 ifbdev->preferred_bpp = 32;
  616.  
  617.         ret = drm_fb_helper_init(dev, &ifbdev->helper,
  618.                                  INTEL_INFO(dev)->num_pipes, 4);
  619.         if (ret) {
  620.                 kfree(ifbdev);
  621.                 return ret;
  622.         }
  623.  
  624.         dev_priv->fbdev = ifbdev;
  625.         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
  626.  
  627.     return 0;
  628. }
  629.  
  630. void intel_fbdev_initial_config(struct drm_device *dev)
  631. {
  632.         struct drm_i915_private *dev_priv = dev->dev_private;
  633.         struct intel_fbdev *ifbdev = dev_priv->fbdev;
  634.  
  635.         /* Due to peculiar init order wrt to hpd handling this is separate. */
  636.         drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
  637. }
  638.  
  639.  
  640. void intel_fbdev_output_poll_changed(struct drm_device *dev)
  641. {
  642.         struct drm_i915_private *dev_priv = dev->dev_private;
  643.         if (dev_priv->fbdev)
  644.                 drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
  645. }
  646.