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From 1a3319588434a2acfe47a38fcdf6583a3b84ecd3 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Fri, 24 Jan 2020 14:22:06 +0000
Subject: [PATCH] drm/fourcc: Add packed 10bit YUV 4:2:0 format
Adds a format that is 3 10bit YUV 4:2:0 samples packed into
a 32bit work (with 2 spare bits).
Supported on Broadcom BCM2711 chips.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
drivers/gpu/drm/drm_fourcc.c | 3 +++
include/uapi/drm/drm_fourcc.h | 11 +++++++++++
2 files changed, 14 insertions(+)
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -286,6 +286,9 @@ const struct drm_format_info *__drm_form
.num_planes = 3, .char_per_block = { 2, 2, 2 },
.block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0,
.vsub = 0, .is_yuv = true },
+ { .format = DRM_FORMAT_P030, .depth = 0, .num_planes = 2,
+ .char_per_block = { 4, 4, 0 }, .block_w = { 3, 0, 0 }, .block_h = { 1, 0, 0 },
+ .hsub = 2, .vsub = 2, .is_yuv = true},
};
unsigned int i;
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -288,6 +288,13 @@ extern "C" {
#define DRM_FORMAT_Q401 fourcc_code('Q', '4', '0', '1')
/*
+ * 2 plane YCbCr MSB aligned, 3 pixels packed into 4 bytes.
+ * index 0 = Y plane, [31:0] x:Y2:Y1:Y0 2:10:10:10 little endian
+ * index 1 = Cr:Cb plane, [63:0] x:Cr2:Cb2:Cr1:x:Cb1:Cr0:Cb0 [2:10:10:10:2:10:10:10] little endian
+ */
+#define DRM_FORMAT_P030 fourcc_code('P', '0', '3', '0') /* 2x2 subsampled Cr:Cb plane 10 bits per channel packed */
+
+/*
* 3 plane YCbCr
* index 0: Y plane, [7:0] Y
* index 1: Cb plane, [7:0] Cb
@@ -777,6 +784,10 @@ drm_fourcc_canonicalize_nvidia_format_mo
* and UV. Some SAND-using hardware stores UV in a separate tiled
* image from Y to reduce the column height, which is not supported
* with these modifiers.
+ *
+ * The DRM_FORMAT_MOD_BROADCOM_SAND128_COL_HEIGHT modifier is also
+ * supported for DRM_FORMAT_P030 where the columns remain as 128 bytes
+ * wide, but as this is a 10 bpp format that translates to 96 pixels.
*/
#define DRM_FORMAT_MOD_BROADCOM_SAND32_COL_HEIGHT(v) \
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