[Intel-gfx] [PATCH] drm/i915/mtl: Add support of Tile4 to MTL

[Lisovskiy, Stanislav]

On Mon, Dec 19, 2022 at 08:27:30PM +0200, Juha-Pekka Heikkila wrote:
> Hi Stan,
> 
> On 19.12.2022 15.50, Stanislav Lisovskiy wrote:
> > We have some Tile4 tests now skipping, which were
> > supposed to be working. So lets make them work, by
> > adding display_ver 14 as supported.
> > 
> > Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
> > ---
> >   drivers/gpu/drm/i915/display/intel_fb.c | 8 ++++----
> >   1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
> > index 63137ae5ab217..75a17f38def53 100644
> > --- a/drivers/gpu/drm/i915/display/intel_fb.c
> > +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> > @@ -158,11 +158,11 @@ struct intel_modifier_desc {
> >   static const struct intel_modifier_desc intel_modifiers[] = {
> >   	{
> >   		.modifier = I915_FORMAT_MOD_4_TILED_DG2_MC_CCS,
> > -		.display_ver = { 13, 13 },
> > +		.display_ver = { 13, 14 },
> 
> I don't think you'd want to do this. These DG2 ccs modifiers rely on usage
> of flat ccs which is not present in Meteorlake.
> 
> >   		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_MC,
> >   	}, {
> >   		.modifier = I915_FORMAT_MOD_4_TILED_DG2_RC_CCS_CC,
> > -		.display_ver = { 13, 13 },
> > +		.display_ver = { 13, 14 },
> 
> Let's drop this change too.
> 
> >   		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_RC_CC,
> >   		.ccs.cc_planes = BIT(1),
> > @@ -170,11 +170,11 @@ static const struct intel_modifier_desc intel_modifiers[] = {
> >   		FORMAT_OVERRIDE(gen12_flat_ccs_cc_formats),
> >   	}, {
> >   		.modifier = I915_FORMAT_MOD_4_TILED_DG2_RC_CCS,
> > -		.display_ver = { 13, 13 },
> > +		.display_ver = { 13, 14 },
> 
> And this.

Ah, I have been surfing yesterday the spec, trying to find if ccs is supported or not, looks like
I got bit confused. 

> 
> >   		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_RC,
> >   	}, {
> >   		.modifier = I915_FORMAT_MOD_4_TILED,
> > -		.display_ver = { 13, 13 },
> > +		.display_ver = { 13, 14 },
> 
> Here you could do something like ".display_ver = { 13, -1 }," to enable
> tile4 from version 13 onward and we'll fix it if it ever change in the
> future.

Yeah, recently had similar approach in other feature.

Stan

> 
> /Juha-Pekka
> 
> >   		.plane_caps = INTEL_PLANE_CAP_TILING_4,
> >   	}, {
> >   		.modifier = I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS,
>