From: Eric R. Smith Date: Thu, 19 Dec 2024 17:49:28 +0000 (-0400) Subject: drm: add modifiers for MediaTek tiled formats X-Git-Tag: block-6.15-20250403~41^2~20^2~113 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=3ab334814dc7dff39075e055e12847d51878916e;p=linux-block.git drm: add modifiers for MediaTek tiled formats MediaTek (MTK) uses some unique tiled memory formats for video decoding. Add these to the uapi drm_fourcc.h so that we can use them in Mesa, GStreamer, and other tools/libraries. v2: - Classify the modifier bits into categories and provide room for expansion (Daniel S.) Signed-off-by: Eric R. Smith Reviewed-by: Daniel Stone Link: https://patchwork.freedesktop.org/patch/msgid/20241219174929.126205-1-eric.smith@collabora.com Signed-off-by: Daniel Stone --- diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index 70f3b00b0681..e41a3cec6a9e 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -421,6 +421,7 @@ extern "C" { #define DRM_FORMAT_MOD_VENDOR_ARM 0x08 #define DRM_FORMAT_MOD_VENDOR_ALLWINNER 0x09 #define DRM_FORMAT_MOD_VENDOR_AMLOGIC 0x0a +#define DRM_FORMAT_MOD_VENDOR_MTK 0x0b /* add more to the end as needed */ @@ -1453,6 +1454,46 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier) */ #define AMLOGIC_FBC_OPTION_MEM_SAVING (1ULL << 0) +/* MediaTek modifiers + * Bits Parameter Notes + * ----- ------------------------ --------------------------------------------- + * 7: 0 TILE LAYOUT Values are MTK_FMT_MOD_TILE_* + * 15: 8 COMPRESSION Values are MTK_FMT_MOD_COMPRESS_* + * 23:16 10 BIT LAYOUT Values are MTK_FMT_MOD_10BIT_LAYOUT_* + * + */ + +#define DRM_FORMAT_MOD_MTK(__flags) fourcc_mod_code(MTK, __flags) + +/* + * MediaTek Tiled Modifier + * The lowest 8 bits of the modifier is used to specify the tiling + * layout. Only the 16L_32S tiling is used for now, but we define an + * "untiled" version and leave room for future expansion. + */ +#define MTK_FMT_MOD_TILE_MASK 0xf +#define MTK_FMT_MOD_TILE_NONE 0x0 +#define MTK_FMT_MOD_TILE_16L32S 0x1 + +/* + * Bits 8-15 specify compression options + */ +#define MTK_FMT_MOD_COMPRESS_MASK (0xf << 8) +#define MTK_FMT_MOD_COMPRESS_NONE (0x0 << 8) +#define MTK_FMT_MOD_COMPRESS_V1 (0x1 << 8) + +/* + * Bits 16-23 specify how the bits of 10 bit formats are + * stored out in memory + */ +#define MTK_FMT_MOD_10BIT_LAYOUT_MASK (0xf << 16) +#define MTK_FMT_MOD_10BIT_LAYOUT_PACKED (0x0 << 16) +#define MTK_FMT_MOD_10BIT_LAYOUT_LSBTILED (0x1 << 16) +#define MTK_FMT_MOD_10BIT_LAYOUT_LSBRASTER (0x2 << 16) + +/* alias for the most common tiling format */ +#define DRM_FORMAT_MOD_MTK_16L_32S_TILE DRM_FORMAT_MOD_MTK(MTK_FMT_MOD_TILE_16L32S) + /* * AMD modifiers *