[PATCH v4 04/11] drm/fourcc: Add DRM_FORMAT_Y10_P32

Tomi Valkeinen
2025-03-26T13:23:26Z

Add Y10_P32, a 10 bit greyscale format, with 3 pixels packed into
32-bit container.

The fourcc for the format is 'YPA4', which comes from Y - Y only, P -
packed, A - 10 (as in 0xA), 4 - 4 bytes.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
drivers/gpu/drm/drm_fourcc.c | 3 +++
include/uapi/drm/drm_fourcc.h | 1 +
2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index 355aaf7b5e9e..e5f04f7ec164 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -353,6 +353,9 @@ const struct drm_format_info *__drm_format_info(u32 format)
{ .format = DRM_FORMAT_XV20, .depth = 0, .num_planes = 2,
.char_per_block = { 4, 8, 0 }, .block_w = { 3, 3, 0 }, .block_h = { 1, 1, 0 },
.hsub = 2, .vsub = 1, .is_yuv = true },
+ { .format = DRM_FORMAT_Y10_P32, .depth = 0, .num_planes = 1,
+ .char_per_block = { 4, 0, 0 }, .block_w = { 3, 0, 0 }, .block_h = { 1, 0, 0 },
+ .hsub = 1, .vsub = 1, .is_yuv = true },
};

unsigned int i;
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 751b8087b35f..f6316adbeb97 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -408,6 +408,7 @@ extern "C" {
/* Greyscale formats */

#define DRM_FORMAT_Y8 fourcc_code('G', 'R', 'E', 'Y') /* 8-bit Y-only */
+#define DRM_FORMAT_Y10_P32 fourcc_code('Y', 'P', 'A', '4') /* [31:0] x:Y2:Y1:Y0 2:10:10:10 little endian */

/*
* Format Modifiers:

--
2.43.0