[igt-dev] [PATCH i-g-t 02/10] include/drm-uapi: Introduce new Tile 4 format

[Zbigniew Kempczyński]

On Fri, Feb 25, 2022 at 10:38:45AM +0530, Jeevan B wrote:
> This tiling layout uses 4KB tiles in a row-major layout. It has the same
> shape as Tile Y at two granularities: 4KB (128B x 32) and 64B (16B x 4). It
> only differs from Tile Y at the 256B granularity in between. At this
> granularity, Tile Y has a shape of 16B x 32 rows, but this tiling has a shape
> of 64B x 8 rows.
> 
> Reference:
> https://cgit.freedesktop.org/drm/drm-tip/commit/?id=c6e7deb0f092616bd8cb19e8c436b212c64daaab
> 
> Signed-off-by: Jeevan B <jeevan.b at intel.com>
> ---
>  include/drm-uapi/drm_fourcc.h | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/include/drm-uapi/drm_fourcc.h b/include/drm-uapi/drm_fourcc.h
> index 91b6a0fd..318b50fa 100644
> --- a/include/drm-uapi/drm_fourcc.h
> +++ b/include/drm-uapi/drm_fourcc.h
> @@ -559,6 +559,17 @@ extern "C" {
>   */
>  #define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC fourcc_mod_code(INTEL, 8)
>  
> +/*
> + * Intel Tile 4 layout
> + *
> + * This is a tiled layout using 4KB tiles in a row-major layout. It has the same
> + * shape as Tile Y at two granularities: 4KB (128B x 32) and 64B (16B x 4). It
> + * only differs from Tile Y at the 256B granularity in between. At this
> + * granularity, Tile Y has a shape of 16B x 32 rows, but this tiling has a shape
> + * of 64B x 8 rows.
> + */
> +#define I915_FORMAT_MOD_4_TILED         fourcc_mod_code(INTEL, 9)
> +
>  /*
>   * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
>   *
> -- 
> 2.17.1
> 

I think you should sync this file, not only apply this change.

--
Zbigniew