[Intel-gfx] [PATCH v2] drm/i915: Fix eDP blank screen after S3 resume on HP desktops

[Daniel Vetter]

On Thu, Jun 21, 2012 at 03:30:41PM +0200, Takashi Iwai wrote:
> This patch fixes the problem on some HP desktop machines with eDP
> which give blank screens after S3 resume.
> 
> It turned out that BLC_PWM_CPU_CTL must be written after
> BLC_PWM_CPU_CTL2.  Otherwise it doesn't take effect on these
> SNB machines.
> 
> Tested with 3.5-rc3 kernel.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49233
> 
> Cc: <stable at vger.kernel.org>
> Signed-off-by: Takashi Iwai <tiwai at suse.de>
Picked up for -fixes, thanks for the patch.
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
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