Commit 3529cb5a authored by Rob Clark's avatar Rob Clark Committed by Dmitry Baryshkov
Browse files

drm/fourcc: Add 32b float formats 



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: default avatarRob Clark <robin.clark@oss.qualcomm.com>
Acked-by: default avatarSimona Vetter <simona@ffwll.ch>
Acked-by: default avatarDaniel Stone <daniels@collabora.com>
Link: https://lore.kernel.org/r/20250625173712.116446-3-robin.clark@oss.qualcomm.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent e04c3521

include/uapi/drm/drm_fourcc.h

+10 −0
Original line number Diff line number Diff line
@@ -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: