[Intel-gfx] [PATCH 12/21] drm/i915: Ensure colorkey and scaling aren't enabled at same time

[Daniel Vetter]

On Tue, Mar 17, 2015 at 02:16:33PM +0000, Chris Wilson wrote:
> On Tue, Mar 17, 2015 at 03:16:01PM +0100, Daniel Vetter wrote:
> > On Sat, Mar 14, 2015 at 10:55:37PM -0700, Chandra Konduru wrote:
> > > Plane scaling and colorkey are mutually exclusive. Ensure scaling
> > > isn't active at the time of enabling colorkey.
> > > 
> > > Signed-off-by: Chandra Konduru <chandra.konduru at intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/intel_sprite.c |    6 ++++++
> > >  1 file changed, 6 insertions(+)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> > > index c010528..0194390 100644
> > > --- a/drivers/gpu/drm/i915/intel_sprite.c
> > > +++ b/drivers/gpu/drm/i915/intel_sprite.c
> > > @@ -319,6 +319,12 @@ skl_update_colorkey(struct drm_plane *drm_plane,
> > >  	const int plane = intel_plane->plane;
> > >  	u32 plane_ctl;
> > >  
> > > +	/* plane scaling and colorkey are mutually exclusive */
> > > +	if (to_intel_plane_state(drm_plane->state)->scaler_id >= 0) {
> > > +		DRM_ERROR("colorkey not allowed with scaler\n");
> > > +		return -EINVAL;
> > > +	}
> > 
> > Yeah this is a bit trouble because of the interactions between colorkey
> > state in hw and the atomic scaler state in the atomic state structures.
> > 
> > Since colorkey isn't support with atomic atm anyway and we want to move
> > towards atomic: Do we really have anyone who cares about legacy sprite
> > ioctls on skl? If we'd just add a 
> 
> Yes. Current userspace uses sprites and colorkey.

Yes I know we have the code around and it'll keep working. This was more a
question of priority and whether we really should keep it working or
whether cros/android don't really care. Since sooner or later we need to
convert it to atomic/properties if we want to keep it working. Right now
(since skl is still prelimary support) we can still do that I hope ...
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch