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

[Jani Nikula]

On Fri, 27 Nov 2020, Daniel Vetter <daniel at ffwll.ch> wrote:
> 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>

With the same conditions,

Acked-by: Jani Nikula <jani.nikula at intel.com>


>
>> 
>> --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
>> > 
>> > _______________________________________________
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>> > Intel-gfx at lists.freedesktop.org
>> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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-- 
Jani Nikula, Intel Open Source Graphics Center