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Diffstat (limited to 'kernel/drivers/gpu/drm/i915/intel_fbdev.c')
-rw-r--r--kernel/drivers/gpu/drm/i915/intel_fbdev.c809
1 files changed, 809 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/i915/intel_fbdev.c b/kernel/drivers/gpu/drm/i915/intel_fbdev.c
new file mode 100644
index 000000000..4e7e7da2e
--- /dev/null
+++ b/kernel/drivers/gpu/drm/i915/intel_fbdev.c
@@ -0,0 +1,809 @@
+/*
+ * Copyright © 2007 David Airlie
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * David Airlie
+ */
+
+#include <linux/async.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/sysrq.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/vga_switcheroo.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include "intel_drv.h"
+#include <drm/i915_drm.h>
+#include "i915_drv.h"
+
+static int intel_fbdev_set_par(struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ struct intel_fbdev *ifbdev =
+ container_of(fb_helper, struct intel_fbdev, helper);
+ int ret;
+
+ ret = drm_fb_helper_set_par(info);
+
+ if (ret == 0) {
+ /*
+ * FIXME: fbdev presumes that all callbacks also work from
+ * atomic contexts and relies on that for emergency oops
+ * printing. KMS totally doesn't do that and the locking here is
+ * by far not the only place this goes wrong. Ignore this for
+ * now until we solve this for real.
+ */
+ mutex_lock(&fb_helper->dev->struct_mutex);
+ ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
+ true);
+ mutex_unlock(&fb_helper->dev->struct_mutex);
+ }
+
+ return ret;
+}
+
+static int intel_fbdev_blank(int blank, struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ struct intel_fbdev *ifbdev =
+ container_of(fb_helper, struct intel_fbdev, helper);
+ int ret;
+
+ ret = drm_fb_helper_blank(blank, info);
+
+ if (ret == 0) {
+ /*
+ * FIXME: fbdev presumes that all callbacks also work from
+ * atomic contexts and relies on that for emergency oops
+ * printing. KMS totally doesn't do that and the locking here is
+ * by far not the only place this goes wrong. Ignore this for
+ * now until we solve this for real.
+ */
+ mutex_lock(&fb_helper->dev->struct_mutex);
+ intel_fb_obj_invalidate(ifbdev->fb->obj, NULL, ORIGIN_GTT);
+ mutex_unlock(&fb_helper->dev->struct_mutex);
+ }
+
+ return ret;
+}
+
+static struct fb_ops intelfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = intel_fbdev_set_par,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_blank = intel_fbdev_blank,
+ .fb_setcmap = drm_fb_helper_setcmap,
+ .fb_debug_enter = drm_fb_helper_debug_enter,
+ .fb_debug_leave = drm_fb_helper_debug_leave,
+};
+
+static int intelfb_alloc(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct intel_fbdev *ifbdev =
+ container_of(helper, struct intel_fbdev, helper);
+ struct drm_framebuffer *fb;
+ struct drm_device *dev = helper->dev;
+ struct drm_mode_fb_cmd2 mode_cmd = {};
+ struct drm_i915_gem_object *obj;
+ int size, ret;
+
+ /* we don't do packed 24bpp */
+ if (sizes->surface_bpp == 24)
+ sizes->surface_bpp = 32;
+
+ mode_cmd.width = sizes->surface_width;
+ mode_cmd.height = sizes->surface_height;
+
+ mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
+ DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
+ mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+ sizes->surface_depth);
+
+ size = mode_cmd.pitches[0] * mode_cmd.height;
+ size = PAGE_ALIGN(size);
+ obj = i915_gem_object_create_stolen(dev, size);
+ if (obj == NULL)
+ obj = i915_gem_alloc_object(dev, size);
+ if (!obj) {
+ DRM_ERROR("failed to allocate framebuffer\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
+ if (IS_ERR(fb)) {
+ ret = PTR_ERR(fb);
+ goto out_unref;
+ }
+
+ /* Flush everything out, we'll be doing GTT only from now on */
+ ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL);
+ if (ret) {
+ DRM_ERROR("failed to pin obj: %d\n", ret);
+ goto out_fb;
+ }
+
+ ifbdev->fb = to_intel_framebuffer(fb);
+
+ return 0;
+
+out_fb:
+ drm_framebuffer_remove(fb);
+out_unref:
+ drm_gem_object_unreference(&obj->base);
+out:
+ return ret;
+}
+
+static int intelfb_create(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct intel_fbdev *ifbdev =
+ container_of(helper, struct intel_fbdev, helper);
+ struct intel_framebuffer *intel_fb = ifbdev->fb;
+ struct drm_device *dev = helper->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct fb_info *info;
+ struct drm_framebuffer *fb;
+ struct drm_i915_gem_object *obj;
+ int size, ret;
+ bool prealloc = false;
+
+ mutex_lock(&dev->struct_mutex);
+
+ if (intel_fb &&
+ (sizes->fb_width > intel_fb->base.width ||
+ sizes->fb_height > intel_fb->base.height)) {
+ DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
+ " releasing it\n",
+ intel_fb->base.width, intel_fb->base.height,
+ sizes->fb_width, sizes->fb_height);
+ drm_framebuffer_unreference(&intel_fb->base);
+ intel_fb = ifbdev->fb = NULL;
+ }
+ if (!intel_fb || WARN_ON(!intel_fb->obj)) {
+ DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
+ ret = intelfb_alloc(helper, sizes);
+ if (ret)
+ goto out_unlock;
+ intel_fb = ifbdev->fb;
+ } else {
+ DRM_DEBUG_KMS("re-using BIOS fb\n");
+ prealloc = true;
+ sizes->fb_width = intel_fb->base.width;
+ sizes->fb_height = intel_fb->base.height;
+ }
+
+ obj = intel_fb->obj;
+ size = obj->base.size;
+
+ info = framebuffer_alloc(0, &dev->pdev->dev);
+ if (!info) {
+ ret = -ENOMEM;
+ goto out_unpin;
+ }
+
+ info->par = helper;
+
+ fb = &ifbdev->fb->base;
+
+ ifbdev->helper.fb = fb;
+ ifbdev->helper.fbdev = info;
+
+ strcpy(info->fix.id, "inteldrmfb");
+
+ info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
+ info->fbops = &intelfb_ops;
+
+ ret = fb_alloc_cmap(&info->cmap, 256, 0);
+ if (ret) {
+ ret = -ENOMEM;
+ goto out_unpin;
+ }
+ /* setup aperture base/size for vesafb takeover */
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out_unpin;
+ }
+ info->apertures->ranges[0].base = dev->mode_config.fb_base;
+ info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
+
+ info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
+ info->fix.smem_len = size;
+
+ info->screen_base =
+ ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
+ size);
+ if (!info->screen_base) {
+ ret = -ENOSPC;
+ goto out_unpin;
+ }
+ info->screen_size = size;
+
+ /* This driver doesn't need a VT switch to restore the mode on resume */
+ info->skip_vt_switch = true;
+
+ drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+ drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
+
+ /* If the object is shmemfs backed, it will have given us zeroed pages.
+ * If the object is stolen however, it will be full of whatever
+ * garbage was left in there.
+ */
+ if (ifbdev->fb->obj->stolen && !prealloc)
+ memset_io(info->screen_base, 0, info->screen_size);
+
+ /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+
+ DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
+ fb->width, fb->height,
+ i915_gem_obj_ggtt_offset(obj), obj);
+
+ mutex_unlock(&dev->struct_mutex);
+ vga_switcheroo_client_fb_set(dev->pdev, info);
+ return 0;
+
+out_unpin:
+ i915_gem_object_ggtt_unpin(obj);
+ drm_gem_object_unreference(&obj->base);
+out_unlock:
+ mutex_unlock(&dev->struct_mutex);
+ return ret;
+}
+
+/** Sets the color ramps on behalf of RandR */
+static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
+ u16 blue, int regno)
+{
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ intel_crtc->lut_r[regno] = red >> 8;
+ intel_crtc->lut_g[regno] = green >> 8;
+ intel_crtc->lut_b[regno] = blue >> 8;
+}
+
+static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
+ u16 *blue, int regno)
+{
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ *red = intel_crtc->lut_r[regno] << 8;
+ *green = intel_crtc->lut_g[regno] << 8;
+ *blue = intel_crtc->lut_b[regno] << 8;
+}
+
+static struct drm_fb_helper_crtc *
+intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
+{
+ int i;
+
+ for (i = 0; i < fb_helper->crtc_count; i++)
+ if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
+ return &fb_helper->crtc_info[i];
+
+ return NULL;
+}
+
+/*
+ * Try to read the BIOS display configuration and use it for the initial
+ * fb configuration.
+ *
+ * The BIOS or boot loader will generally create an initial display
+ * configuration for us that includes some set of active pipes and displays.
+ * This routine tries to figure out which pipes and connectors are active
+ * and stuffs them into the crtcs and modes array given to us by the
+ * drm_fb_helper code.
+ *
+ * The overall sequence is:
+ * intel_fbdev_init - from driver load
+ * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
+ * drm_fb_helper_init - build fb helper structs
+ * drm_fb_helper_single_add_all_connectors - more fb helper structs
+ * intel_fbdev_initial_config - apply the config
+ * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
+ * drm_setup_crtcs - build crtc config for fbdev
+ * intel_fb_initial_config - find active connectors etc
+ * drm_fb_helper_single_fb_probe - set up fbdev
+ * intelfb_create - re-use or alloc fb, build out fbdev structs
+ *
+ * Note that we don't make special consideration whether we could actually
+ * switch to the selected modes without a full modeset. E.g. when the display
+ * is in VGA mode we need to recalculate watermarks and set a new high-res
+ * framebuffer anyway.
+ */
+static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
+ struct drm_fb_helper_crtc **crtcs,
+ struct drm_display_mode **modes,
+ struct drm_fb_offset *offsets,
+ bool *enabled, int width, int height)
+{
+ struct drm_device *dev = fb_helper->dev;
+ int i, j;
+ bool *save_enabled;
+ bool fallback = true;
+ int num_connectors_enabled = 0;
+ int num_connectors_detected = 0;
+ uint64_t conn_configured = 0, mask;
+ int pass = 0;
+
+ save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
+ GFP_KERNEL);
+ if (!save_enabled)
+ return false;
+
+ memcpy(save_enabled, enabled, dev->mode_config.num_connector);
+ mask = (1 << fb_helper->connector_count) - 1;
+retry:
+ for (i = 0; i < fb_helper->connector_count; i++) {
+ struct drm_fb_helper_connector *fb_conn;
+ struct drm_connector *connector;
+ struct drm_encoder *encoder;
+ struct drm_fb_helper_crtc *new_crtc;
+
+ fb_conn = fb_helper->connector_info[i];
+ connector = fb_conn->connector;
+
+ if (conn_configured & (1 << i))
+ continue;
+
+ if (pass == 0 && !connector->has_tile)
+ continue;
+
+ if (connector->status == connector_status_connected)
+ num_connectors_detected++;
+
+ if (!enabled[i]) {
+ DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
+ connector->name);
+ conn_configured |= (1 << i);
+ continue;
+ }
+
+ if (connector->force == DRM_FORCE_OFF) {
+ DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
+ connector->name);
+ enabled[i] = false;
+ continue;
+ }
+
+ encoder = connector->encoder;
+ if (!encoder || WARN_ON(!encoder->crtc)) {
+ if (connector->force > DRM_FORCE_OFF)
+ goto bail;
+
+ DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
+ connector->name);
+ enabled[i] = false;
+ conn_configured |= (1 << i);
+ continue;
+ }
+
+ num_connectors_enabled++;
+
+ new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
+
+ /*
+ * Make sure we're not trying to drive multiple connectors
+ * with a single CRTC, since our cloning support may not
+ * match the BIOS.
+ */
+ for (j = 0; j < fb_helper->connector_count; j++) {
+ if (crtcs[j] == new_crtc) {
+ DRM_DEBUG_KMS("fallback: cloned configuration\n");
+ goto bail;
+ }
+ }
+
+ DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
+ connector->name);
+
+ /* go for command line mode first */
+ modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
+
+ /* try for preferred next */
+ if (!modes[i]) {
+ DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
+ connector->name, connector->has_tile);
+ modes[i] = drm_has_preferred_mode(fb_conn, width,
+ height);
+ }
+
+ /* No preferred mode marked by the EDID? Are there any modes? */
+ if (!modes[i] && !list_empty(&connector->modes)) {
+ DRM_DEBUG_KMS("using first mode listed on connector %s\n",
+ connector->name);
+ modes[i] = list_first_entry(&connector->modes,
+ struct drm_display_mode,
+ head);
+ }
+
+ /* last resort: use current mode */
+ if (!modes[i]) {
+ /*
+ * IMPORTANT: We want to use the adjusted mode (i.e.
+ * after the panel fitter upscaling) as the initial
+ * config, not the input mode, which is what crtc->mode
+ * usually contains. But since our current fastboot
+ * code puts a mode derived from the post-pfit timings
+ * into crtc->mode this works out correctly. We don't
+ * use hwmode anywhere right now, so use it for this
+ * since the fb helper layer wants a pointer to
+ * something we own.
+ */
+ DRM_DEBUG_KMS("looking for current mode on connector %s\n",
+ connector->name);
+ intel_mode_from_pipe_config(&encoder->crtc->hwmode,
+ to_intel_crtc(encoder->crtc)->config);
+ modes[i] = &encoder->crtc->hwmode;
+ }
+ crtcs[i] = new_crtc;
+
+ DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
+ connector->name,
+ pipe_name(to_intel_crtc(encoder->crtc)->pipe),
+ encoder->crtc->base.id,
+ modes[i]->hdisplay, modes[i]->vdisplay,
+ modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
+
+ fallback = false;
+ conn_configured |= (1 << i);
+ }
+
+ if ((conn_configured & mask) != mask) {
+ pass++;
+ goto retry;
+ }
+
+ /*
+ * If the BIOS didn't enable everything it could, fall back to have the
+ * same user experiencing of lighting up as much as possible like the
+ * fbdev helper library.
+ */
+ if (num_connectors_enabled != num_connectors_detected &&
+ num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
+ DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
+ DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
+ num_connectors_detected);
+ fallback = true;
+ }
+
+ if (fallback) {
+bail:
+ DRM_DEBUG_KMS("Not using firmware configuration\n");
+ memcpy(enabled, save_enabled, dev->mode_config.num_connector);
+ kfree(save_enabled);
+ return false;
+ }
+
+ kfree(save_enabled);
+ return true;
+}
+
+static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
+ .initial_config = intel_fb_initial_config,
+ .gamma_set = intel_crtc_fb_gamma_set,
+ .gamma_get = intel_crtc_fb_gamma_get,
+ .fb_probe = intelfb_create,
+};
+
+static void intel_fbdev_destroy(struct drm_device *dev,
+ struct intel_fbdev *ifbdev)
+{
+ if (ifbdev->helper.fbdev) {
+ struct fb_info *info = ifbdev->helper.fbdev;
+
+ unregister_framebuffer(info);
+ iounmap(info->screen_base);
+ if (info->cmap.len)
+ fb_dealloc_cmap(&info->cmap);
+
+ framebuffer_release(info);
+ }
+
+ drm_fb_helper_fini(&ifbdev->helper);
+
+ drm_framebuffer_unregister_private(&ifbdev->fb->base);
+ drm_framebuffer_remove(&ifbdev->fb->base);
+}
+
+/*
+ * Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
+ * The core display code will have read out the current plane configuration,
+ * so we use that to figure out if there's an object for us to use as the
+ * fb, and if so, we re-use it for the fbdev configuration.
+ *
+ * Note we only support a single fb shared across pipes for boot (mostly for
+ * fbcon), so we just find the biggest and use that.
+ */
+static bool intel_fbdev_init_bios(struct drm_device *dev,
+ struct intel_fbdev *ifbdev)
+{
+ struct intel_framebuffer *fb = NULL;
+ struct drm_crtc *crtc;
+ struct intel_crtc *intel_crtc;
+ struct intel_initial_plane_config *plane_config = NULL;
+ unsigned int max_size = 0;
+
+ if (!i915.fastboot)
+ return false;
+
+ /* Find the largest fb */
+ for_each_crtc(dev, crtc) {
+ intel_crtc = to_intel_crtc(crtc);
+
+ if (!intel_crtc->active || !crtc->primary->fb) {
+ DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
+ pipe_name(intel_crtc->pipe));
+ continue;
+ }
+
+ if (intel_crtc->plane_config.size > max_size) {
+ DRM_DEBUG_KMS("found possible fb from plane %c\n",
+ pipe_name(intel_crtc->pipe));
+ plane_config = &intel_crtc->plane_config;
+ fb = to_intel_framebuffer(crtc->primary->fb);
+ max_size = plane_config->size;
+ }
+ }
+
+ if (!fb) {
+ DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
+ goto out;
+ }
+
+ /* Now make sure all the pipes will fit into it */
+ for_each_crtc(dev, crtc) {
+ unsigned int cur_size;
+
+ intel_crtc = to_intel_crtc(crtc);
+
+ if (!intel_crtc->active) {
+ DRM_DEBUG_KMS("pipe %c not active, skipping\n",
+ pipe_name(intel_crtc->pipe));
+ continue;
+ }
+
+ DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
+ pipe_name(intel_crtc->pipe));
+
+ /*
+ * See if the plane fb we found above will fit on this
+ * pipe. Note we need to use the selected fb's pitch and bpp
+ * rather than the current pipe's, since they differ.
+ */
+ cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
+ cur_size = cur_size * fb->base.bits_per_pixel / 8;
+ if (fb->base.pitches[0] < cur_size) {
+ DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
+ pipe_name(intel_crtc->pipe),
+ cur_size, fb->base.pitches[0]);
+ plane_config = NULL;
+ fb = NULL;
+ break;
+ }
+
+ cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
+ cur_size = intel_fb_align_height(dev, cur_size,
+ fb->base.pixel_format,
+ fb->base.modifier[0]);
+ cur_size *= fb->base.pitches[0];
+ DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
+ pipe_name(intel_crtc->pipe),
+ intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
+ intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
+ fb->base.bits_per_pixel,
+ cur_size);
+
+ if (cur_size > max_size) {
+ DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
+ pipe_name(intel_crtc->pipe),
+ cur_size, max_size);
+ plane_config = NULL;
+ fb = NULL;
+ break;
+ }
+
+ DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
+ pipe_name(intel_crtc->pipe),
+ max_size, cur_size);
+ }
+
+ if (!fb) {
+ DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
+ goto out;
+ }
+
+ ifbdev->preferred_bpp = fb->base.bits_per_pixel;
+ ifbdev->fb = fb;
+
+ drm_framebuffer_reference(&ifbdev->fb->base);
+
+ /* Final pass to check if any active pipes don't have fbs */
+ for_each_crtc(dev, crtc) {
+ intel_crtc = to_intel_crtc(crtc);
+
+ if (!intel_crtc->active)
+ continue;
+
+ WARN(!crtc->primary->fb,
+ "re-used BIOS config but lost an fb on crtc %d\n",
+ crtc->base.id);
+ }
+
+
+ DRM_DEBUG_KMS("using BIOS fb for initial console\n");
+ return true;
+
+out:
+
+ return false;
+}
+
+static void intel_fbdev_suspend_worker(struct work_struct *work)
+{
+ intel_fbdev_set_suspend(container_of(work,
+ struct drm_i915_private,
+ fbdev_suspend_work)->dev,
+ FBINFO_STATE_RUNNING,
+ true);
+}
+
+int intel_fbdev_init(struct drm_device *dev)
+{
+ struct intel_fbdev *ifbdev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int ret;
+
+ if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
+ return -ENODEV;
+
+ ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
+ if (ifbdev == NULL)
+ return -ENOMEM;
+
+ drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
+
+ if (!intel_fbdev_init_bios(dev, ifbdev))
+ ifbdev->preferred_bpp = 32;
+
+ ret = drm_fb_helper_init(dev, &ifbdev->helper,
+ INTEL_INFO(dev)->num_pipes, 4);
+ if (ret) {
+ kfree(ifbdev);
+ return ret;
+ }
+
+ dev_priv->fbdev = ifbdev;
+ INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
+
+ drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
+
+ return 0;
+}
+
+void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
+{
+ struct drm_i915_private *dev_priv = data;
+ struct intel_fbdev *ifbdev = dev_priv->fbdev;
+
+ /* Due to peculiar init order wrt to hpd handling this is separate. */
+ drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
+}
+
+void intel_fbdev_fini(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ if (!dev_priv->fbdev)
+ return;
+
+ flush_work(&dev_priv->fbdev_suspend_work);
+
+ async_synchronize_full();
+ intel_fbdev_destroy(dev, dev_priv->fbdev);
+ kfree(dev_priv->fbdev);
+ dev_priv->fbdev = NULL;
+}
+
+void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_fbdev *ifbdev = dev_priv->fbdev;
+ struct fb_info *info;
+
+ if (!ifbdev)
+ return;
+
+ info = ifbdev->helper.fbdev;
+
+ if (synchronous) {
+ /* Flush any pending work to turn the console on, and then
+ * wait to turn it off. It must be synchronous as we are
+ * about to suspend or unload the driver.
+ *
+ * Note that from within the work-handler, we cannot flush
+ * ourselves, so only flush outstanding work upon suspend!
+ */
+ if (state != FBINFO_STATE_RUNNING)
+ flush_work(&dev_priv->fbdev_suspend_work);
+ console_lock();
+ } else {
+ /*
+ * The console lock can be pretty contented on resume due
+ * to all the printk activity. Try to keep it out of the hot
+ * path of resume if possible.
+ */
+ WARN_ON(state != FBINFO_STATE_RUNNING);
+ if (!console_trylock()) {
+ /* Don't block our own workqueue as this can
+ * be run in parallel with other i915.ko tasks.
+ */
+ schedule_work(&dev_priv->fbdev_suspend_work);
+ return;
+ }
+ }
+
+ /* On resume from hibernation: If the object is shmemfs backed, it has
+ * been restored from swap. If the object is stolen however, it will be
+ * full of whatever garbage was left in there.
+ */
+ if (state == FBINFO_STATE_RUNNING && ifbdev->fb->obj->stolen)
+ memset_io(info->screen_base, 0, info->screen_size);
+
+ fb_set_suspend(info, state);
+ console_unlock();
+}
+
+void intel_fbdev_output_poll_changed(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ if (dev_priv->fbdev)
+ drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
+}
+
+void intel_fbdev_restore_mode(struct drm_device *dev)
+{
+ int ret;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (!dev_priv->fbdev)
+ return;
+
+ ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper);
+ if (ret)
+ DRM_DEBUG("failed to restore crtc mode\n");
+}