diff options
| author | Ming Qian <ming.qian@nxp.com> | 2023-03-22 05:13:05 +0000 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-04-15 09:06:34 +0100 |
| commit | a490ea68444084ec0368c019e11ee4a7e5c8bb13 (patch) | |
| tree | 7035adad34d34a3e32f95b4274114715c1842664 | |
| parent | aa1080404200694aace5989f99664ca75e73b03d (diff) | |
| download | lwn-a490ea68444084ec0368c019e11ee4a7e5c8bb13.tar.gz lwn-a490ea68444084ec0368c019e11ee4a7e5c8bb13.zip | |
media: Add Y012 video format
Y012 is a luma-only formats with 12-bits per pixel,
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>
| -rw-r--r-- | Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst | 15 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ioctl.c | 1 | ||||
| -rw-r--r-- | include/uapi/linux/videodev2.h | 1 |
3 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst index 62078a01de76..cf8e4dfbfbd4 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst @@ -103,6 +103,17 @@ are often referred to as greyscale formats. - ... - ... + * .. _V4L2-PIX-FMT-Y012: + + - ``V4L2_PIX_FMT_Y012`` + - 'Y012' + + - Y'\ :sub:`0`\ [3:0] `0000` + - Y'\ :sub:`0`\ [11:4] + - ... + - ... + - ... + * .. _V4L2-PIX-FMT-Y14: - ``V4L2_PIX_FMT_Y14`` @@ -146,3 +157,7 @@ are often referred to as greyscale formats. than 16 bits. For example, 10 bits per pixel uses values in the range 0 to 1023. For the IPU3_Y10 format 25 pixels are packed into 32 bytes, which leaves the 6 most significant bits of the last byte padded with 0. + + For Y012 and Y12 formats, Y012 places its data in the 12 high bits, with + padding zeros in the 4 low bits, in contrast to the Y12 format, which has + its padding located in the most significant bits of the 16 bit word. diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 07b9708cf69f..354ba586078c 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1303,6 +1303,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; + case V4L2_PIX_FMT_Y012: descr = "12-bit Greyscale (bits 15-4)"; break; case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 1f88e00327ea..2eb3e66a3427 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -586,6 +586,7 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_Y6 v4l2_fourcc('Y', '0', '6', ' ') /* 6 Greyscale */ #define V4L2_PIX_FMT_Y10 v4l2_fourcc('Y', '1', '0', ' ') /* 10 Greyscale */ #define V4L2_PIX_FMT_Y12 v4l2_fourcc('Y', '1', '2', ' ') /* 12 Greyscale */ +#define V4L2_PIX_FMT_Y012 v4l2_fourcc('Y', '0', '1', '2') /* 12 Greyscale */ #define V4L2_PIX_FMT_Y14 v4l2_fourcc('Y', '1', '4', ' ') /* 14 Greyscale */ #define V4L2_PIX_FMT_Y16 v4l2_fourcc('Y', '1', '6', ' ') /* 16 Greyscale */ #define V4L2_PIX_FMT_Y16_BE v4l2_fourcc_be('Y', '1', '6', ' ') /* 16 Greyscale BE */ |