From e04c3521df073b688b9e9e2213cd3c588e3b6e68 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Wed, 25 Jun 2025 10:37:10 -0700 Subject: [PATCH 4200/5403] drm/fourcc: Add missing half-float formats Not something that is likely to be scanned out, but GPUs usually support half-float formats with 1, 2, or possibly 3 components, and it is useful to be able to import/export them with a valid fourcc, and/or use gbm to create them. These correspond to PIPE_FORMAT_{R16,R16G16,R16G16B16}_FLOAT in mesa. Signed-off-by: Rob Clark Acked-by: Simona Vetter Acked-by: Daniel Stone Link: https://lore.kernel.org/r/20250625173712.116446-2-robin.clark@oss.qualcomm.com Signed-off-by: Dmitry Baryshkov --- include/uapi/drm/drm_fourcc.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index 6483f76a2165..89a82d02b7e8 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -218,7 +218,7 @@ extern "C" { #define DRM_FORMAT_ABGR16161616 fourcc_code('A', 'B', '4', '8') /* [63:0] A:B:G:R 16:16:16:16 little endian */ /* - * Floating point 64bpp RGB + * Half-Floating point - 16b/component * IEEE 754-2008 binary16 half-precision float * [15:0] sign:exponent:mantissa 1:5:10 */ @@ -228,6 +228,10 @@ extern "C" { #define DRM_FORMAT_ARGB16161616F fourcc_code('A', 'R', '4', 'H') /* [63:0] A:R:G:B 16:16:16:16 little endian */ #define DRM_FORMAT_ABGR16161616F fourcc_code('A', 'B', '4', 'H') /* [63:0] A:B:G:R 16:16:16:16 little endian */ +#define DRM_FORMAT_R16F fourcc_code('R', ' ', ' ', 'H') /* [15:0] R 16 little endian */ +#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 */ + /* * RGBA format with 10-bit components packed in 64-bit per pixel, with 6 bits * of unused padding per component: -- 2.54.0