[Intel-gfx] [PATCH 11/15] drm/framebuffer: Format modifier for Intel Gen-12 media compression

[Kahola, Mika]

On Wed, 2019-12-18 at 18:11 +0200, Imre Deak wrote:
> From: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> 
> Gen-12 display can decompress surfaces compressed by the media
> engine, add
> a new modifier as the driver needs to know the surface was compressed
> by
> the media or render engine.
> 
> v2: Update code comment describing the color plane order for YUV
>     semiplanar formats.
> 
> Cc: Nanley G Chery <nanley.g.chery at intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> Signed-off-by: Imre Deak <imre.deak at intel.com>

Reviewed-by: Mika Kahola <mika.kahola at intel.com>

> ---
>  include/uapi/drm/drm_fourcc.h | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/include/uapi/drm/drm_fourcc.h
> b/include/uapi/drm/drm_fourcc.h
> index 5ba481f49931..8bc0b31597d8 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -421,6 +421,19 @@ extern "C" {
>   */
>  #define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS fourcc_mod_code(INTEL,
> 6)
>  
> +/*
> + * Intel color control surfaces (CCS) for Gen-12 media compression
> + *
> + * The main surface is Y-tiled and at plane index 0, the CCS is
> linear and
> + * at index 1. A 64B CCS cache line corresponds to an area of 4x1
> tiles in
> + * main surface. In other words, 4 bits in CCS map to a main surface
> cache
> + * line pair. The main surface pitch is required to be a multiple of
> four
> + * Y-tile widths. For semi-planar formats like NV12, CCS planes
> follow the
> + * Y and UV planes i.e., planes 0 and 1 are used for Y and UV
> surfaces,
> + * planes 2 and 3 for the respective CCS.
> + */
> +#define I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS fourcc_mod_code(INTEL,
> 7)
> +
>  /*
>   * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized
> macroblocks
>   *