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drm/fourcc: Add NV20 and NV30 YUV formats

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DRM_FORMAT_NV20 and DRM_FORMAT_NV30 formats is the 2x1 and non-subsampled
variant of NV15, a 10-bit 2-plane YUV format that has no padding between
components. Instead, luminance and chrominance samples are grouped into 4s
so that each group is packed into an integer number of bytes:

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 when the total number of luminance samples is a multiple
of 4.

V2: Added NV30 format

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Sandy Huang <hjc@rock-chips.com>
Reviewed-by: Christopher Obbard <chris.obbard@collabora.com>
Tested-by: Christopher Obbard <chris.obbard@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231023173718.188102-2-jonas@kwiboo.se
This commit is contained in:
Jonas Karlman 2023-10-23 17:37:14 +00:00 committed by Heiko Stuebner
parent 215737e37d
commit 728c15b4b5
2 changed files with 10 additions and 0 deletions
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8
drivers/gpu/drm/drm_fourcc.c
View File

@ -299,6 +299,14 @@ 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 = 1,

2
include/uapi/drm/drm_fourcc.h
View File

@ -323,6 +323,8 @@ 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