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media: Add BGR48_12 video format

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BGR48_12 is a reversed RGB format with 12 bits per component like BGR24,
expanded to 16bits.
Data in the 12 high bits, zeros in the 4 low bits,
arranged in little endian order.

Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Ming Qian 2023-03-22 05:13:08 +00:00 committed by Mauro Carvalho Chehab
parent 99c9549677
commit da0b7a400e
4 changed files with 38 additions and 0 deletions
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33
Documentation/userspace-api/media/v4l/pixfmt-rgb.rst
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@ -956,6 +956,39 @@ number of bits for each component.
\endgroup
12 Bits Per Component
==============================
These formats store an RGB triplet in six or eight bytes, with 12 bits per component.
Expand the bits per component to 16 bits, data in the high bits, zeros in the low bits,
arranged in little endian order.
.. raw:: latex
\small
.. flat-table:: RGB Formats With 12 Bits Per Component
:header-rows: 1
* - Identifier
- Code
- Byte 1-0
- Byte 3-2
- Byte 5-4
- Byte 7-6
* .. _V4L2-PIX-FMT-BGR48-12:
- ``V4L2_PIX_FMT_BGR48_12``
- 'B312'
- B\ :sub:`15-4`
- G\ :sub:`15-4`
- R\ :sub:`15-4`
-
.. raw:: latex
\normalsize
Deprecated RGB Formats
======================

1
drivers/media/v4l2-core/v4l2-common.c
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@ -252,6 +252,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
{ .format = V4L2_PIX_FMT_RGB565, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_RGB555, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_BGR666, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_BGR48_12, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 6, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
/* YUV packed formats */
{ .format = V4L2_PIX_FMT_YUYV, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },

1
drivers/media/v4l2-core/v4l2-ioctl.c
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@ -1298,6 +1298,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break;
case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break;
case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break;
case V4L2_PIX_FMT_BGR48_12: descr = "12-bit Depth BGR"; break;
case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;

3
include/uapi/linux/videodev2.h
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@ -580,6 +580,9 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_RGBA1010102 v4l2_fourcc('R', 'A', '3', '0') /* 32 RGBA-10-10-10-2 */
#define V4L2_PIX_FMT_ARGB2101010 v4l2_fourcc('A', 'R', '3', '0') /* 32 ARGB-2-10-10-10 */
/* RGB formats (6 or 8 bytes per pixel) */
#define V4L2_PIX_FMT_BGR48_12 v4l2_fourcc('B', '3', '1', '2') /* 48 BGR 12-bit per component */
/* Grey formats */
#define V4L2_PIX_FMT_GREY v4l2_fourcc('G', 'R', 'E', 'Y') /* 8 Greyscale */
#define V4L2_PIX_FMT_Y4 v4l2_fourcc('Y', '0', '4', ' ') /* 4 Greyscale */