[Intel-gfx] [PATCH v2] drm/i915/hsw: keep gamma and CSC enabled for primary plane disable

[Ville Syrjälä]

On Thu, Oct 15, 2015 at 02:31:09PM +0200, Daniel Vetter wrote:
> 
> On Thu, Oct 15, 2015 at 12:51 AM, Kevin Strasser <kevin.strasser at linux.intel.com> wrote:
> > On HSW the crc differs between black and disabled primary planes, causing an
> > assert to fail in the kms_universal_plane test. It seems that gamma correction
> > and color space conversion are causing the black primary plane case to result in
> > a brighter color than the disabled primary plane case.
> >
> > Keep gamma and CSC bits enabled for plane disable path on HSW.
> >
> > v2: Avoid use of RMW
> >     Keep path unchanged for non-HSW users
> >
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89331
> > Testcase: igt/kms_universal_plane/universal-plane-pipe-A-functional
> > Signed-off-by: Kevin Strasser <kevin.strasser at linux.intel.com>
> 
> With big discussions please add everyone who participated (Ville, Chris,
> Jani, me) to the cc list of the sob section of the patch when doing a new
> revisions.
> 
> Bob did something eerily similarly a while ago to fix crc failures:
> 
> http://lists.freedesktop.org/archives/intel-gfx/2015-August/074657.html
> http://lists.freedesktop.org/archives/intel-gfx/2015-August/074828.html
> 
> Unfortunately those patches did go nowhere :( Related?

Those seem to be for active plane cases. I'll go review them...

-- 
Ville Syrjälä
Intel OTC