linux-kernel - [PATCH v5 04/11] drm/fourcc: Add DRM_FORMAT_Y10

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Message-Id: <20250425-xilinx-formats-v5-4-c74263231630@ideasonboard.com>
Date: Fri, 25 Apr 2025 14:01:24 +0300
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Vishal Sagar <vishal.sagar@....com>, 
 Anatoliy Klymenko <anatoliy.klymenko@....com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Michal Simek <michal.simek@....com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Geert Uytterhoeven <geert@...ux-m68k.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, 
 Pekka Paalanen <ppaalanen@...il.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v5 04/11] drm/fourcc: Add DRM_FORMAT_Y10_P32

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@...asonboard.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 5af64a683dd7..fceb7a2dfeb4 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -415,6 +415,7 @@ extern "C" {
  */
 
 #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