blob: 9d05c3888d307c0786c07d9766ab2fbf246afce1 [file] [log] [blame]
/*
* 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/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 "intel_frontbuffer.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
{
struct drm_i915_gem_object *obj = ifbdev->fb->obj;
unsigned int origin = ifbdev->vma->fence ? ORIGIN_GTT : ORIGIN_CPU;
intel_fb_obj_invalidate(obj, origin);
}
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)
intel_fbdev_invalidate(ifbdev);
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)
intel_fbdev_invalidate(ifbdev);
return ret;
}
static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
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_pan_display(var, info);
if (ret == 0)
intel_fbdev_invalidate(ifbdev);
return ret;
}
static struct fb_ops intelfb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_set_par = intel_fbdev_set_par,
.fb_fillrect = drm_fb_helper_cfb_fillrect,
.fb_copyarea = drm_fb_helper_cfb_copyarea,
.fb_imageblit = drm_fb_helper_cfb_imageblit,
.fb_pan_display = intel_fbdev_pan_display,
.fb_blank = intel_fbdev_blank,
};
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_i915_private *dev_priv = to_i915(dev);
struct i915_ggtt *ggtt = &dev_priv->ggtt;
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);
/* If the FB is too big, just don't use it since fbdev is not very
* important and we should probably use that space with FBC or other
* features. */
obj = NULL;
if (size * 2 < ggtt->stolen_usable_size)
obj = i915_gem_object_create_stolen(dev_priv, size);
if (obj == NULL)
obj = i915_gem_object_create(dev_priv, size);
if (IS_ERR(obj)) {
DRM_ERROR("failed to allocate framebuffer\n");
ret = PTR_ERR(obj);
goto err;
}
fb = intel_framebuffer_create(obj, &mode_cmd);
if (IS_ERR(fb)) {
ret = PTR_ERR(fb);
goto err_obj;
}
ifbdev->fb = to_intel_framebuffer(fb);
return 0;
err_obj:
i915_gem_object_put(obj);
err:
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 = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
struct i915_ggtt *ggtt = &dev_priv->ggtt;
struct fb_info *info;
struct drm_framebuffer *fb;
struct i915_vma *vma;
bool prealloc = false;
void __iomem *vaddr;
int ret;
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)
return ret;
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;
}
mutex_lock(&dev->struct_mutex);
intel_runtime_pm_get(dev_priv);
/* Pin the GGTT vma for our access via info->screen_base.
* This also validates that any existing fb inherited from the
* BIOS is suitable for own access.
*/
vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_MODE_ROTATE_0);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
goto out_unlock;
}
info = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(info)) {
DRM_ERROR("Failed to allocate fb_info\n");
ret = PTR_ERR(info);
goto out_unpin;
}
info->par = helper;
fb = &ifbdev->fb->base;
ifbdev->helper.fb = fb;
strcpy(info->fix.id, "inteldrmfb");
info->fbops = &intelfb_ops;
/* setup aperture base/size for vesafb takeover */
info->apertures->ranges[0].base = dev->mode_config.fb_base;
info->apertures->ranges[0].size = ggtt->mappable_end;
info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma);
info->fix.smem_len = vma->node.size;
vaddr = i915_vma_pin_iomap(vma);
if (IS_ERR(vaddr)) {
DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
ret = PTR_ERR(vaddr);
goto out_unpin;
}
info->screen_base = vaddr;
info->screen_size = vma->node.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->format->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 (intel_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%08x\n",
fb->width, fb->height, i915_ggtt_offset(vma));
ifbdev->vma = vma;
intel_runtime_pm_put(dev_priv);
mutex_unlock(&dev->struct_mutex);
vga_switcheroo_client_fb_set(pdev, info);
return 0;
out_unpin:
intel_unpin_fb_vma(vma);
out_unlock:
intel_runtime_pm_put(dev_priv);
mutex_unlock(&dev->struct_mutex);
return ret;
}
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_i915_private *dev_priv = to_i915(fb_helper->dev);
unsigned long conn_configured, conn_seq, mask;
unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
int i, j;
bool *save_enabled;
bool fallback = true, ret = true;
int num_connectors_enabled = 0;
int num_connectors_detected = 0;
struct drm_modeset_acquire_ctx ctx;
save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
if (!save_enabled)
return false;
drm_modeset_acquire_init(&ctx, 0);
while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0)
drm_modeset_backoff(&ctx);
memcpy(save_enabled, enabled, count);
mask = GENMASK(count - 1, 0);
conn_configured = 0;
retry:
conn_seq = conn_configured;
for (i = 0; i < 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 & BIT(i))
continue;
if (conn_seq == 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 |= BIT(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->state->best_encoder;
if (!encoder || WARN_ON(!connector->state->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 |= BIT(i);
continue;
}
num_connectors_enabled++;
new_crtc = intel_fb_helper_crtc(fb_helper,
connector->state->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 < 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);
/* 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
* code puts a mode derived from the post-pfit timings
* into crtc->mode this works out correctly.
*
* This is crtc->mode and not crtc->state->mode for the
* fastboot check to work correctly. crtc_state->mode has
* I915_MODE_FLAG_INHERITED, which we clear to force check
* state.
*/
DRM_DEBUG_KMS("looking for current mode on connector %s\n",
connector->name);
modes[i] = &connector->state->crtc->mode;
}
crtcs[i] = new_crtc;
DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
connector->name,
connector->state->crtc->base.id,
connector->state->crtc->name,
modes[i]->hdisplay, modes[i]->vdisplay,
modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
fallback = false;
conn_configured |= BIT(i);
}
if ((conn_configured & mask) != mask && conn_configured != conn_seq)
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_priv)->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, count);
ret = false;
}
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
kfree(save_enabled);
return ret;
}
static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
.initial_config = intel_fb_initial_config,
.fb_probe = intelfb_create,
};
static void intel_fbdev_destroy(struct intel_fbdev *ifbdev)
{
/* We rely on the object-free to release the VMA pinning for
* the info->screen_base mmaping. Leaking the VMA is simpler than
* trying to rectify all the possible error paths leading here.
*/
drm_fb_helper_fini(&ifbdev->helper);
if (ifbdev->vma) {
mutex_lock(&ifbdev->helper.dev->struct_mutex);
intel_unpin_fb_vma(ifbdev->vma);
mutex_unlock(&ifbdev->helper.dev->struct_mutex);
}
if (ifbdev->fb)
drm_framebuffer_remove(&ifbdev->fb->base);
kfree(ifbdev);
}
/*
* 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;
unsigned int max_size = 0;
/* Find the largest fb */
for_each_crtc(dev, crtc) {
struct drm_i915_gem_object *obj =
intel_fb_obj(crtc->primary->state->fb);
intel_crtc = to_intel_crtc(crtc);
if (!crtc->state->active || !obj) {
DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
pipe_name(intel_crtc->pipe));
continue;
}
if (obj->base.size > max_size) {
DRM_DEBUG_KMS("found possible fb from plane %c\n",
pipe_name(intel_crtc->pipe));
fb = to_intel_framebuffer(crtc->primary->state->fb);
max_size = obj->base.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 (!crtc->state->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.format->cpp[0];
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]);
fb = NULL;
break;
}
cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
cur_size = intel_fb_align_height(&fb->base, 0, cur_size);
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.format->cpp[0] * 8,
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);
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.format->cpp[0] * 8;
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 (!crtc->state->active)
continue;
WARN(!crtc->primary->state->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)->drm,
FBINFO_STATE_RUNNING,
true);
}
int intel_fbdev_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_fbdev *ifbdev;
int ret;
if (WARN_ON(INTEL_INFO(dev_priv)->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, 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;
}
static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
{
struct intel_fbdev *ifbdev = data;
/* Due to peculiar init order wrt to hpd handling this is separate. */
if (drm_fb_helper_initial_config(&ifbdev->helper,
ifbdev->preferred_bpp))
intel_fbdev_unregister(to_i915(ifbdev->helper.dev));
}
void intel_fbdev_initial_config_async(struct drm_device *dev)
{
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
if (!ifbdev)
return;
ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
}
static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
{
if (!ifbdev->cookie)
return;
/* Only serialises with all preceding async calls, hence +1 */
async_synchronize_cookie(ifbdev->cookie + 1);
ifbdev->cookie = 0;
}
void intel_fbdev_unregister(struct drm_i915_private *dev_priv)
{
struct intel_fbdev *ifbdev = dev_priv->fbdev;
if (!ifbdev)
return;
cancel_work_sync(&dev_priv->fbdev_suspend_work);
if (!current_is_async())
intel_fbdev_sync(ifbdev);
drm_fb_helper_unregister_fbi(&ifbdev->helper);
}
void intel_fbdev_fini(struct drm_i915_private *dev_priv)
{
struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv->fbdev);
if (!ifbdev)
return;
intel_fbdev_destroy(ifbdev);
}
void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_fbdev *ifbdev = dev_priv->fbdev;
struct fb_info *info;
if (!ifbdev || !ifbdev->vma)
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);
drm_fb_helper_set_suspend(&ifbdev->helper, state);
console_unlock();
}
void intel_fbdev_output_poll_changed(struct drm_device *dev)
{
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
if (!ifbdev)
return;
intel_fbdev_sync(ifbdev);
if (ifbdev->vma)
drm_fb_helper_hotplug_event(&ifbdev->helper);
}
void intel_fbdev_restore_mode(struct drm_device *dev)
{
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
if (!ifbdev)
return;
intel_fbdev_sync(ifbdev);
if (!ifbdev->vma)
return;
if (drm_fb_helper_restore_fbdev_mode_unlocked(&ifbdev->helper) == 0)
intel_fbdev_invalidate(ifbdev);
}