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drm/fourcc: Add 32b float formats

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Add 1, 2, 3, and 4 component 32b float formats, so that buffers with
these formats can be imported/exported with fourcc+modifier, and/or
created by gbm.

These correspond to PIPE_FORMAT_{R32,R32G32,R32G32B32,R32G32B32A32}_FLOAT
in mesa.

v2: Fix comment describing float32 layout [Sima]

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Acked-by: Simona Vetter <simona@ffwll.ch>
Acked-by: Daniel Stone <daniels@collabora.com>
Link: https://lore.kernel.org/r/20250625173712.116446-3-robin.clark@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Rob Clark
2025-06-25 10:37:11 -07:00
committed by Dmitry Baryshkov
parent e04c3521df
commit 3529cb5ab1
1 changed files with 10 additions and 0 deletions
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10
include/uapi/drm/drm_fourcc.h
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@@ -232,6 +232,16 @@ extern "C" {
#define DRM_FORMAT_GR1616F fourcc_code('G', 'R', ' ', 'H') /* [31:0] G:R 16:16 little endian */
#define DRM_FORMAT_BGR161616F fourcc_code('B', 'G', 'R', 'H') /* [47:0] B:G:R 16:16:16 little endian */
/*
* Floating point - 32b/component
* IEEE 754-2008 binary32 float
* [31:0] sign:exponent:mantissa 1:8:23
*/
#define DRM_FORMAT_R32F fourcc_code('R', ' ', ' ', 'F') /* [31:0] R 32 little endian */
#define DRM_FORMAT_GR3232F fourcc_code('G', 'R', ' ', 'F') /* [63:0] R:G 32:32 little endian */
#define DRM_FORMAT_BGR323232F fourcc_code('B', 'G', 'R', 'F') /* [95:0] R:G:B 32:32:32 little endian */
#define DRM_FORMAT_ABGR32323232F fourcc_code('A', 'B', '8', 'F') /* [127:0] R:G:B:A 32:32:32:32 little endian */
/*
* RGBA format with 10-bit components packed in 64-bit per pixel, with 6 bits
* of unused padding per component: