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

["Souza, Jose" <jose.souza@intel.com>]

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@intel.com>

This needs a Fixes tag so it gets backported to Linux 6.8.

> 
> > Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/933
> > Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@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)
>