Re: [Intel-gfx] [PATCH 1/2] drm/fourcc: define Intel Meteorlake related ccs modifiers

[Matt Atwood <matthew.s.atwood@intel.com>]

On Thu, May 11, 2023 at 01:37:13PM +0300, Juha-Pekka Heikkila wrote:
> Add Tile4 type ccs modifiers with aux buffer needed for MTL
> 
Bspec: 49251, 49252, 49253
> Cc: dri-devel@lists.freedesktop.org
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
> Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
> ---
>  include/uapi/drm/drm_fourcc.h | 43 +++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index de703c6be969..cbe214adf1e4 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -657,6 +657,49 @@ extern "C" {
>   */
>  #define I915_FORMAT_MOD_4_TILED_DG2_RC_CCS_CC fourcc_mod_code(INTEL, 12)
>  
> +/*
> + * Intel color control surfaces (CCS) for display ver 14 render compression.
nit: Color Control Surfaces, ver.
> + *
> + * The main surface is tile4 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
> + * tile4 widths.
> + */
> +#define I915_FORMAT_MOD_4_TILED_MTL_RC_CCS fourcc_mod_code(INTEL, 13)
> +
> +/*
> + * Intel color control surfaces (CCS) for display ver 14 media compression
nit: Color Control Surfaces, ver.
> + *
> + * The main surface is tile4 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
> + * tile4 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_4_TILED_MTL_MC_CCS fourcc_mod_code(INTEL, 14)
> +
> +/*
> + * Intel Color Control Surface with Clear Color (CCS) for display ver 14 render
nit: ver.
> + * compression.
> + *
> + * The main surface is tile4 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_4_TILED_MTL_RC_CCS_CC fourcc_mod_code(INTEL, 15)
> +
>  /*
>   * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
>   *
> -- 
> 2.25.1
>