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drm-uapi: update drm_fourcc.h

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adds Apple modifiers from drm-misc-next:
https://cgit.freedesktop.org/drm-misc/commit/?id=c8619f5402cbcccfe58151b53421029852473e4c

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34075>
This commit is contained in:
Alyssa Rosenzweig 2025-03-14 10:25:15 -04:00 • committed by Marge Bot
parent 1b63ffc31e
commit ba8eeaee8c
1 changed files with 45 additions and 0 deletions
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45
include/drm-uapi/drm_fourcc.h
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@ -422,6 +422,7 @@ extern "C" {
#define DRM_FORMAT_MOD_VENDOR_ALLWINNER 0x09
#define DRM_FORMAT_MOD_VENDOR_AMLOGIC 0x0a
#define DRM_FORMAT_MOD_VENDOR_MTK 0x0b
#define DRM_FORMAT_MOD_VENDOR_APPLE 0x0c
/* add more to the end as needed */
@ -1494,6 +1495,50 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier)
/* alias for the most common tiling format */
#define DRM_FORMAT_MOD_MTK_16L_32S_TILE DRM_FORMAT_MOD_MTK(MTK_FMT_MOD_TILE_16L32S)
/*
* Apple GPU-tiled layouts.
*
* Apple GPUs support nonlinear tilings with optional lossless compression.
*
* GPU-tiled images are divided into 16KiB tiles:
*
* Bytes per pixel Tile size
* --------------- ---------
* 1 128x128
* 2 128x64
* 4 64x64
* 8 64x32
* 16 32x32
*
* Tiles are raster-order. Pixels within a tile are interleaved (Morton order).
*
* Compressed images pad the body to 128-bytes and are immediately followed by a
* metadata section. The metadata section rounds the image dimensions to
* powers-of-two and contains 8 bytes for each 16x16 compression subtile.
* Subtiles are interleaved (Morton order).
*
* All images are 128-byte aligned.
*
* These layouts fundamentally do not have meaningful strides. No matter how we
* specify strides for these layouts, userspace unaware of Apple image layouts
* will be unable to use correctly the specified stride for any purpose.
* Userspace aware of the image layouts do not use strides. The most "correct"
* convention would be setting the image stride to 0. Unfortunately, some
* software assumes the stride is at least (width * bytes per pixel). We
* therefore require that stride equals (width * bytes per pixel). Since the
* stride is arbitrary here, we pick the simplest convention.
*
* Although containing two sections, compressed image layouts are treated in
* software as a single plane. This is modelled after AFBC, a similar
* scheme. Attempting to separate the sections to be "explicit" in DRM would
* only generate more confusion, as software does not treat the image this way.
*
* For detailed information on the hardware image layouts, see
* https://docs.mesa3d.org/drivers/asahi.html#image-layouts
*/
#define DRM_FORMAT_MOD_APPLE_GPU_TILED fourcc_mod_code(APPLE, 1)
#define DRM_FORMAT_MOD_APPLE_GPU_TILED_COMPRESSED fourcc_mod_code(APPLE, 2)
/*
* AMD modifiers
*