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drm: add modifiers for MediaTek tiled formats

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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 <eric.smith@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241219174929.126205-1-eric.smith@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Eric R. Smith 2024-12-19 13:49:28 -04:00 • committed by Daniel Stone
parent 798047e63a
commit 3ab334814d
1 changed files with 41 additions and 0 deletions
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41
include/uapi/drm/drm_fourcc.h
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@ -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
*