[Intel-gfx] [PATCH 1/2] drm/framebuffer: Format modifier for Intel Gen 12 render compression with Clear Color

[Daniel Vetter]

On Fri, Nov 27, 2020 at 04:31:00PM +0200, Imre Deak wrote:
> Hi Daniel, Jani,
> 
> is it ok to merge this patch along with 2/2 via the i915 tree?

Ack from mesa (userspace in general, but mesa is kinda mandatory) is
missing I think. With that

Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> 
> --Imre
> 
> On Mon, Nov 23, 2020 at 08:26:30PM +0200, Imre Deak wrote:
> > From: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
> > 
> > Gen12 display can decompress surfaces compressed by render engine with
> > Clear Color, add a new modifier as the driver needs to know the surface
> > was compressed by render engine.
> > 
> > V2: Description changes as suggested by Rafael.
> > V3: Mention the Clear Color size of 64 bits in the comments(DK)
> > v4: Fix trailing whitespaces
> > v5: Explain Clear Color in the documentation.
> > v6: Documentation Nitpicks(Nanley)
> > 
> > Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
> > Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> > Cc: Kalyan Kondapally <kalyan.kondapally at intel.com>
> > Cc: Rafael Antognolli <rafael.antognolli at intel.com>
> > Cc: Nanley Chery <nanley.g.chery at intel.com>
> > Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
> > Signed-off-by: Imre Deak <imre.deak at intel.com>
> > ---
> >  include/uapi/drm/drm_fourcc.h | 19 +++++++++++++++++++
> >  1 file changed, 19 insertions(+)
> > 
> > diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> > index ca48ed0e6bc1..0a1b2c4c4bee 100644
> > --- a/include/uapi/drm/drm_fourcc.h
> > +++ b/include/uapi/drm/drm_fourcc.h
> > @@ -527,6 +527,25 @@ extern "C" {
> >   */
> >  #define I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS fourcc_mod_code(INTEL, 7)
> >  
> > +/*
> > + * Intel Color Control Surface with Clear Color (CCS) for Gen-12 render
> > + * compression.
> > + *
> > + * The main surface is Y-tiled and is at plane index 0 whereas CCS is linear
> > + * and at index 1. The clear color is stored at index 2, and the pitch should
> > + * be ignored. The clear color structure is 256 bits. The first 128 bits
> > + * represents Raw Clear Color Red, Green, Blue and Alpha color each represented
> > + * by 32 bits. The raw clear color is consumed by the 3d engine and generates
> > + * the converted clear color of size 64 bits. The first 32 bits store the Lower
> > + * Converted Clear Color value and the next 32 bits store the Higher Converted
> > + * Clear Color value when applicable. The Converted Clear Color values are
> > + * consumed by the DE. The last 64 bits are used to store Color Discard Enable
> > + * and Depth Clear Value Valid which are ignored by the DE. A CCS cache line
> > + * corresponds to an area of 4x1 tiles in the main surface. The main surface
> > + * pitch is required to be a multiple of 4 tile widths.
> > + */
> > +#define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC fourcc_mod_code(INTEL, 8)
> > +
> >  /*
> >   * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
> >   *
> > -- 
> > 2.25.1
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch