[Intel-gfx] [PATCH 1/3] drm/i915/skl: Allow universal planes to position

[Daniel Vetter]

On Tue, Mar 10, 2015 at 09:23:54AM +0530, sonika wrote:
> 
> On Monday 09 March 2015 02:16 PM, Daniel Vetter wrote:
> >On Mon, Mar 09, 2015 at 08:33:27AM +0530, sonika wrote:
> >>On Thursday 05 March 2015 06:24 PM, Daniel Vetter wrote:
> >>>On Thu, Mar 05, 2015 at 02:51:26PM +0530, Sonika Jindal wrote:
> >>>>Signed-off-by: Sonika Jindal <sonika.jindal at intel.com>
> >>>Imo this needs a little more commit message, and more important it needs
> >>>igt test coverage. Best approach there is probably to take the plane test
> >>>we have already and extend it to the primary plane.
> >>>-Daniel
> >>This is just to take care of the case when the size of the fb is smaller
> >>than the crtc.
> >>I have extended the rotation test (yet to be posted), to create a smaller
> >>primary plane fb to be used for 90/270 rotation.
> >>
> >>Since we still set position to 0 for primary plane, I did not add any test
> >>case for positioning of primary plane.
> >>That can be added as a separate activity when positioning support is added.
> >>Right now this is just to allow smaller fb for primary plane which is
> >>possible with universal planes gen >=9.
> >Through universal planes it's already possible to position any plane
> >anywhere, and this code is all that makes sure this doesn't happen for the
> >primary plane. Since you've just changed that I think this needs a
> >testcase in igt.
> >
> >Or maybe I missed something and it's indeed not yet possible to do this?
> >-Daniel
> Yes, it isn't possible yet. We set the position to 0 in
> skylake_update_primary_plane.

Hm indeed. But with your patch we no longer reject plane updates for the
primary plane which aren't positioned at 0,0. So there's now a bug. I
guess either go the full way towards implementing universal plane support
on skl (and fix up the hw programming) or we need to wait with this patch
a bit more.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch