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drm/i915: clear the stolen fb before resuming

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commit 88afe715dd
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>
Cc: stable@vger.kernel.org (3.9 only)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2013-05-07 18:54:05 +03:00 committed by Daniel Vetter
parent c4ae25ecdf
commit 1ffc5289bf
1 changed files with 14 additions and 2 deletions
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16
drivers/gpu/drm/i915/intel_fb.c
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@ -262,10 +262,22 @@ 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");