[RFC PATCH 1/3] drm/fourcc: define Intel Xe2 related tile4 ccs modifier

[Chery, Nanley G]

> -----Original Message-----
> From: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
> Sent: Monday, May 6, 2024 2:53 PM
> To: intel-xe at lists.freedesktop.org; intel-gfx at lists.freedesktop.org
> Cc: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>; Chery, Nanley G <nanley.g.chery at intel.com>; Saarinen, Jani
> <jani.saarinen at intel.com>; Graunke, Kenneth W <kenneth.w.graunke at intel.com>; Souza, Jose <jose.souza at intel.com>; Mathew, Alwin
> <alwin.mathew at intel.com>; Zhang, Jianxun <jianxun.zhang at intel.com>; Syrjala, Ville <ville.syrjala at linux.intel.com>; Nikula, Jani
> <jani.nikula at intel.com>
> Subject: [RFC PATCH 1/3] drm/fourcc: define Intel Xe2 related tile4 ccs modifier
> 
> Add Tile4 type ccs modifier to indicate presence of compression on Xe2
> 
> Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
> ---
>  include/uapi/drm/drm_fourcc.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> index 84d502e42961..50db2cc89642 100644
> --- a/include/uapi/drm/drm_fourcc.h
> +++ b/include/uapi/drm/drm_fourcc.h
> @@ -702,6 +702,18 @@ extern "C" {
>   */
>  #define I915_FORMAT_MOD_4_TILED_MTL_RC_CCS_CC fourcc_mod_code(INTEL, 15)
> 
> +/*
> + * Intel Color Control Surfaces (CCS) for graphics ver. 20 render compression.
> + *
> + * The main surface is Tile 4 and at plane index 0. For semi-planar formats
> + * like NV12, the Y and UV planes are Tile 4 and are located at plane indices
> + * 0 and 1, respectively. The CCS for all planes are stored outside of the
> + * GEM object in a reserved memory area dedicated for the storage of the
> + * CCS data for all compressible GEM objects. The main surface pitch is
> + * required to be a multiple of four Tile 4 widths.
> + */

The pitch requirement is gone on this generation, isn't it?

-Nanley

> +#define I915_FORMAT_MOD_4_TILED_XE2_CCS fourcc_mod_code(INTEL, 16)
> +
>  /*
>   * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
>   *
> --
> 2.43.2