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authorJani Nikula <jani.nikula@intel.com>2013-05-07 18:54:05 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-19 11:38:32 -0700
commitf28cecc16e43ca84d44e5d5fe7bc050e711d2c80 (patch)
tree7606cc354b9eee5c44feff0345e9c429a9e14195
parent60724ed5b84824747d0bc5bb2a5b10af96503ca4 (diff)
drm/i915: clear the stolen fb before resuming
commit 1ffc5289bfcf7f4c4e4213240bb4be68c48ce603 upstream. Similar to commit 88afe715dd5469bc24ca7a19ac62dd3c241cab48 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Sun Dec 16 12:15:41 2012 +0000 drm/i915: Clear the stolen fb before enabling but on the resume path. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=57191 Reported-and-tested-by: Nikolay Amiantov <nikoamia@gmail.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/gpu/drm/i915/intel_fb.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 981bdce3634e..898832b9ee9c 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -261,10 +261,22 @@ void intel_fbdev_fini(struct drm_device *dev)
void intel_fbdev_set_suspend(struct drm_device *dev, int state)
{
drm_i915_private_t *dev_priv = dev->dev_private;
- if (!dev_priv->fbdev)
+ struct intel_fbdev *ifbdev = dev_priv->fbdev;
+ struct fb_info *info;
+
+ if (!ifbdev)
return;
- fb_set_suspend(dev_priv->fbdev->helper.fbdev, state);
+ info = ifbdev->helper.fbdev;
+
+ /* 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 && ifbdev->ifb.obj->stolen)
+ memset_io(info->screen_base, 0, info->screen_size);
+
+ fb_set_suspend(info, state);
}
MODULE_LICENSE("GPL and additional rights");