[PATCH] drm/i915/display: Disable AuxCCS framebuffers if built for Xe

[Souza, Jose]

On Thu, 2024-02-29 at 16:44 +0000, Souza, Jose wrote:
> On Wed, 2024-02-28 at 06:04 -0800, José Roberto de Souza wrote:
> > On Wed, 2024-02-28 at 16:02 +0200, Juha-Pekka Heikkila wrote:
> > > AuxCCS framebuffers don't work on Xe driver hence disable them
> > > from plane capabilities until they are fixed. FlatCCS framebuffers
> > > work and they are left enabled. CCS is left untouched for i915
> > > driver.
> > > 
> > 
> > Reviewed-by: José Roberto de Souza <jose.souza at intel.com>
> 
> This needs a Fixes tag so it gets backported to Linux 6.8.

Tested on Xe KMD and fixed the issue at least on ADL-P, you can also add:

Tested-by: José Roberto de Souza <jose.souza at intel.com>

thank you

> 
> > 
> > > Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/933
> > > Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
> > > ---
> > >  drivers/gpu/drm/i915/display/skl_universal_plane.c | 3 +++
> > >  1 file changed, 3 insertions(+)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > > index e941e2e4fd14..860574d04f88 100644
> > > --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > > +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > > @@ -2295,6 +2295,9 @@ static u8 skl_get_plane_caps(struct drm_i915_private *i915,
> > >  	if (HAS_4TILE(i915))
> > >  		caps |= INTEL_PLANE_CAP_TILING_4;
> > >  
> > > +	if (!IS_ENABLED(I915) && !HAS_FLAT_CCS(i915))
> > > +		return caps;
> > > +
> > >  	if (skl_plane_has_rc_ccs(i915, pipe, plane_id)) {
> > >  		caps |= INTEL_PLANE_CAP_CCS_RC;
> > >  		if (DISPLAY_VER(i915) >= 12)
> > 
>