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media: Add a pixel format for MIPI packed 12bit luma only.

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This is the format used by monochrome 12bit image sensors.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2020-05-07 16:59:03 +01:00
committed by popcornmix
parent f78626dc1d
commit ec127d471e
4 changed files with 48 additions and 0 deletions
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45
Documentation/userspace-api/media/v4l/pixfmt-y12p.rst Normal file
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@@ -0,0 +1,45 @@
.. Permission is granted to copy, distribute and/or modify this
.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
.. _V4L2-PIX-FMT-Y12P:
******************************
V4L2_PIX_FMT_Y12P ('Y12P')
******************************
Grey-scale image as a MIPI RAW12 packed array
Description
===========
This is a packed grey-scale image format with a depth of 12 bits per
pixel. Two consecutive pixels are packed into 3 bytes. The first 2 bytes
contain the 8 high order bits of the pixels, and the 3rd byte contains the 4
least significants bits of each pixel, in the same order.
**Byte Order.**
Each cell is one byte.
.. tabularcolumns:: |p{2.2cm}|p{1.2cm}|p{1.2cm}|p{3.1cm}|
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 2 1 1 1
- - start + 0:
- Y'\ :sub:`00high`
- Y'\ :sub:`01high`
- Y'\ :sub:`01low`\ (bits 7--4)
Y'\ :sub:`00low`\ (bits 3--0)

1
Documentation/userspace-api/media/v4l/yuv-formats.rst
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@@ -28,6 +28,7 @@ to brightness information.
pixfmt-grey
pixfmt-y10
pixfmt-y12
pixfmt-y12p
pixfmt-y14
pixfmt-y10b
pixfmt-y10p

1
drivers/media/v4l2-core/v4l2-ioctl.c
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@@ -1283,6 +1283,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
case V4L2_PIX_FMT_Y12P: descr = "12-bit Greyscale (MIPI Packed)"; break;
case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;

1
include/uapi/linux/videodev2.h
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@@ -580,6 +580,7 @@ struct v4l2_pix_format {
/* Grey bit-packed formats */
#define V4L2_PIX_FMT_Y10BPACK v4l2_fourcc('Y', '1', '0', 'B') /* 10 Greyscale bit-packed */
#define V4L2_PIX_FMT_Y10P v4l2_fourcc('Y', '1', '0', 'P') /* 10 Greyscale, MIPI RAW10 packed */
#define V4L2_PIX_FMT_Y12P v4l2_fourcc('Y', '1', '2', 'P') /* 12 Greyscale, MIPI RAW12 packed */
/* Palette formats */
#define V4L2_PIX_FMT_PAL8 v4l2_fourcc('P', 'A', 'L', '8') /* 8 8-bit palette */