linux-kernel - [PATCH 1/1] drm: drm_fourcc: add NV20 and NV30 format

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Message-Id: <20210709121550.17958-1-hjc@rock-chips.com>
Date:   Fri,  9 Jul 2021 20:15:50 +0800
From:   Sandy Huang <hjc@...k-chips.com>
To:     hjc@...k-chips.com, dri-devel@...ts.freedesktop.org,
        heiko@...ech.de,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-kernel@...ts.infradead.org, ben.davis@....com,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] drm: drm_fourcc: add NV20 and NV30 format

DRM_FORMAT_NV20 and DRM_FORMAT_NV30 is a 2 plane format suitable for
linear layouts, this two format is similar to NV15 has no padding
between component, but NV15 is 4:2:0 sub-sampling, NV20 is 4:2:2
sub-sampling and NV30 is no-sampling.

YYYY = UVUV = 4 * 10 bits = 40 bits = 5 bytes

The '20' and '30' suffix refers to the optimum effective bits per
pixel which is achieved.

Signed-off-by: Sandy Huang <hjc@...k-chips.com>
Change-Id: I84da7e03125e675f274c6307128b4b7b307767cc
---
 drivers/gpu/drm/drm_fourcc.c  | 8 ++++++++
 include/uapi/drm/drm_fourcc.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index eda832f9200d..9498e9d466fb 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -258,6 +258,14 @@ const struct drm_format_info *__drm_format_info(u32 format)
 		  .num_planes = 2, .char_per_block = { 5, 5, 0 },
 		  .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2,
 		  .vsub = 2, .is_yuv = true },
+		{ .format = DRM_FORMAT_NV20,		.depth = 0,
+		  .num_planes = 2, .char_per_block = { 5, 5, 0 },
+		  .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2,
+		  .vsub = 1, .is_yuv = true },
+		{ .format = DRM_FORMAT_NV30,		.depth = 0,
+		  .num_planes = 2, .char_per_block = { 5, 5, 0 },
+		  .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 1,
+		  .vsub = 1, .is_yuv = true },
 		{ .format = DRM_FORMAT_Q410,		.depth = 0,
 		  .num_planes = 3, .char_per_block = { 2, 2, 2 },
 		  .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0,
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index f7156322aba5..a30bb7ef7632 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -279,6 +279,8 @@ extern "C" {
  * index 1 = Cr:Cb plane, [39:0] Cr1:Cb1:Cr0:Cb0 little endian
  */
 #define DRM_FORMAT_NV15		fourcc_code('N', 'V', '1', '5') /* 2x2 subsampled Cr:Cb plane */
+#define DRM_FORMAT_NV20		fourcc_code('N', 'V', '2', '0') /* 2x1 subsampled Cr:Cb plane */
+#define DRM_FORMAT_NV30		fourcc_code('N', 'V', '3', '0') /* non-subsampled Cr:Cb plane */
 
 /*
  * 2 plane YCbCr MSB aligned
-- 
2.17.1