From: Tvrtko Ursulin <[email protected]> Starting with SKL display engine can scan out Y, and newly introduced Yf tiling formats so add the latter to the frame buffer modifier space.
v2: Definitions moved to drm_fourcc.h. v3: Try to document the format better. Signed-off-by: Tvrtko Ursulin <[email protected]> Reviewed-by: Damien Lespiau <[email protected]> --- include/uapi/drm/drm_fourcc.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index 1a5a357..e6efac2 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -192,4 +192,19 @@ */ #define I915_FORMAT_MOD_Y_TILED fourcc_mod_code(INTEL, 2) +/* + * Intel Yf-tiling layout + * + * This is a tiled layout using 4Kb tiles in row-major layout. + * Within the tile pixels are laid out in 16 256 byte units / sub-tiles which + * are arranged in four groups (two wide, two high) with column-major layout. + * Each group therefore consits out of four 256 byte units, which are also laid + * out as 2x2 column-major. + * 256 byte units are made out of four 64 byte blocks of pixels, producing + * either a square block or a 2:1 unit. + * 64 byte blocks of pixels contain four pixel rows of 16 bytes, where the width + * in pixel depends on the pixel depth. + */ +#define I915_FORMAT_MOD_Yf_TILED fourcc_mod_code(INTEL, 3) + #endif /* DRM_FOURCC_H */ -- 2.3.0 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
