git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From e3da593c79ce8e7ab7072fe1551fc1e8b5494eab Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 25 Jun 2020 17:51:03 +0100
   4 Subject: [PATCH] media: Add a pixel format for MIPI packed 14bit luma
   5  only.
   6
   7 This is the format used by monochrome 14bit image sensors.
   8
   9 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  10 ---
  11  .../userspace-api/media/v4l/pixfmt-y14p.rst   | 54 +++++++++++++++++++
  12  .../userspace-api/media/v4l/yuv-formats.rst   |  1 +
  13  drivers/media/v4l2-core/v4l2-ioctl.c          |  1 +
  14  include/uapi/linux/videodev2.h                |  1 +
  15  4 files changed, 57 insertions(+)
  16  create mode 100644 Documentation/userspace-api/media/v4l/pixfmt-y14p.rst
  17
  18 --- /dev/null
  19 +++ b/Documentation/userspace-api/media/v4l/pixfmt-y14p.rst
  20 @@ -0,0 +1,54 @@
  21 +.. Permission is granted to copy, distribute and/or modify this
  22 +.. document under the terms of the GNU Free Documentation License,
  23 +.. Version 1.1 or any later version published by the Free Software
  24 +.. Foundation, with no Invariant Sections, no Front-Cover Texts
  25 +.. and no Back-Cover Texts. A copy of the license is included at
  26 +.. Documentation/media/uapi/fdl-appendix.rst.
  27 +..
  28 +.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
  29 +
  30 +.. _V4L2-PIX-FMT-Y14P:
  31 +
  32 +**************************
  33 +V4L2_PIX_FMT_Y14P ('Y14P')
  34 +**************************
  35 +
  36 +Grey-scale image as a MIPI RAW14 packed array
  37 +
  38 +
  39 +Description
  40 +===========
  41 +
  42 +This is a packed grey-scale image format with a depth of 14 bits per
  43 +pixel. Every four consecutive samples are packed into seven bytes. Each
  44 +of the first four bytes contain the eight high order bits of the pixels,
  45 +and the three following bytes contains the six least significants bits of
  46 +each pixel, in the same order.
  47 +
  48 +**Byte Order.**
  49 +Each cell is one byte.
  50 +
  51 +.. tabularcolumns:: |p{1.8cm}|p{1.0cm}|p{1.0cm}|p{1.0cm}|p{1.1cm}|p{3.3cm}|p{3.3cm}|p{3.3cm}|
  52 +
  53 +.. flat-table::
  54 +    :header-rows:  0
  55 +    :stub-columns: 0
  56 +    :widths:       2 1 1 1 1 3 3 3
  57 +
  58 +
  59 +    -  -  start + 0:
  60 +       -  Y'\ :sub:`00high`
  61 +       -  Y'\ :sub:`01high`
  62 +       -  Y'\ :sub:`02high`
  63 +       -  Y'\ :sub:`03high`
  64 +       -  Y'\ :sub:`01low bits 1--0`\ (bits 7--6)
  65 +
  66 +         Y'\ :sub:`00low bits 5--0`\ (bits 5--0)
  67 +
  68 +       -  Y'\ :sub:`02low bits 3--0`\ (bits 7--4)
  69 +
  70 +         Y'\ :sub:`01low bits 5--2`\ (bits 3--0)
  71 +
  72 +       -  Y'\ :sub:`03low bits 5--0`\ (bits 7--2)
  73 +
  74 +         Y'\ :sub:`02low bits 5--4`\ (bits 1--0)
  75 --- a/Documentation/userspace-api/media/v4l/yuv-formats.rst
  76 +++ b/Documentation/userspace-api/media/v4l/yuv-formats.rst
  77 @@ -30,6 +30,7 @@ to brightness information.
  78      pixfmt-y12
  79      pixfmt-y12p
  80      pixfmt-y14
  81 +    pixfmt-y14p
  82      pixfmt-y10b
  83      pixfmt-y10p
  84      pixfmt-y16
  85 --- a/drivers/media/v4l2-core/v4l2-ioctl.c
  86 +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
  87 @@ -1284,6 +1284,7 @@ static void v4l_fill_fmtdesc(struct v4l2
  88         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
  89         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
  90         case V4L2_PIX_FMT_Y12P:         descr = "12-bit Greyscale (MIPI Packed)"; break;
  91 +       case V4L2_PIX_FMT_Y14P:         descr = "14-bit Greyscale (MIPI Packed)"; break;
  92         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
  93         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
  94         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
  95 --- a/include/uapi/linux/videodev2.h
  96 +++ b/include/uapi/linux/videodev2.h
  97 @@ -581,6 +581,7 @@ struct v4l2_pix_format {
  98  #define V4L2_PIX_FMT_Y10BPACK    v4l2_fourcc('Y', '1', '0', 'B') /* 10  Greyscale bit-packed */
  99  #define V4L2_PIX_FMT_Y10P    v4l2_fourcc('Y', '1', '0', 'P') /* 10  Greyscale, MIPI RAW10 packed */
 100  #define V4L2_PIX_FMT_Y12P    v4l2_fourcc('Y', '1', '2', 'P') /* 12  Greyscale, MIPI RAW12 packed */
 101 +#define V4L2_PIX_FMT_Y14P    v4l2_fourcc('Y', '1', '4', 'P') /* 14  Greyscale, MIPI RAW12 packed */
 102
 103  /* Palette formats */
 104  #define V4L2_PIX_FMT_PAL8    v4l2_fourcc('P', 'A', 'L', '8') /*  8  8-bit palette */