linux-kernel - [PATCH v4 1/2] drm/fourcc: add a 10bits fully packed variant of NV12

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Date:   Sun, 18 Nov 2018 00:53:45 +0800
From:   Randy Li <ayaka@...lik.info>
To:     dri-devel@...ts.freedesktop.org
Cc:     maarten.lankhorst@...ux.intel.com, maxime.ripard@...tlin.com,
        sean@...rly.run, airlied@...ux.ie, linux-kernel@...r.kernel.org,
        hjc@...k-chips.com, heiko@...ech.de,
        linux-rockchip@...ts.infradead.org, Randy Li <ayaka@...lik.info>
Subject: [PATCH v4 1/2] drm/fourcc: add a 10bits fully packed variant of NV12

This pixel format is a fully packed and 10bits variant of NV12.
A luma pixel would take 10bits in memory, without any
filled bits between pixels in a stride.

Signed-off-by: Randy Li <ayaka@...lik.info>
---
 drivers/gpu/drm/drm_fourcc.c  | 1 +
 include/uapi/drm/drm_fourcc.h | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index f523948c82b1..76d3ce314f31 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -237,6 +237,7 @@ const struct drm_format_info *__drm_format_info(u32 format)
 		{ .format = DRM_FORMAT_X0L2,		.depth = 0,  .num_planes = 1,
 		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
 		  .hsub = 2, .vsub = 2, .is_yuv = true },
+		{ .format = DRM_FORMAT_NV12_10LE40,	.depth = 0,  .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2 },
 	};
 
 	unsigned int i;
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index e7e48f1f4a74..5de5aff83d85 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -193,6 +193,14 @@ extern "C" {
 #define DRM_FORMAT_NV61		fourcc_code('N', 'V', '6', '1') /* 2x1 subsampled Cb:Cr plane */
 #define DRM_FORMAT_NV24		fourcc_code('N', 'V', '2', '4') /* non-subsampled Cr:Cb plane */
 #define DRM_FORMAT_NV42		fourcc_code('N', 'V', '4', '2') /* non-subsampled Cb:Cr plane */
+/*
+ * A fully packed  2 plane YCbCr
+ * Y1 0-9, Y2 10-19, Y3 20-29, Y4 20-39
+ * ....
+ * U1V1: 0-19, U2V2: 20-39
+ */
+#define DRM_FORMAT_NV12_10LE40	fourcc_code('R', 'K', '2', '0') /* 2x2 subsampled Cr:Cb plane */
+
 
 /*
  * 3 plane YCbCr
-- 
2.14.5