target/linux/bcm27xx/patches-5.4/950-0844-media-v4l-Add-14-bit-raw-bayer-pixel-formats.patch

   1 From 59a535539277240c4bdbb9c21bc07c8b586b2c3a Mon Sep 17 00:00:00 2001
   2 From: Sakari Ailus <sakari.ailus@linux.intel.com>
   3 Date: Mon, 24 Feb 2020 18:52:20 +0100
   4 Subject: [PATCH] media: v4l: Add 14-bit raw bayer pixel formats
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Commit d12127ed0e18192491c2508caae45bb19c2f8fdd upstream.
  10
  11 The formats added by this patch are:
  12
  13         V4L2_PIX_FMT_SBGGR14
  14         V4L2_PIX_FMT_SGBRG14
  15         V4L2_PIX_FMT_SGRBG14
  16         V4L2_PIX_FMT_SRGGB14
  17
  18 Signed-off-by: Jouni Ukkonen <jouni.ukkonen@intel.com>
  19 Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
  20 [dg@emlix.com: rebased onto current media_tree]
  21 Signed-off-by: Daniel Glöckner <dg@emlix.com>
  22 Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
  23 Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
  24 ---
  25  Documentation/media/uapi/v4l/pixfmt-bayer.rst |  1 +
  26  .../media/uapi/v4l/pixfmt-srggb14.rst         | 82 +++++++++++++++++++
  27  drivers/media/v4l2-core/v4l2-ioctl.c          |  4 +
  28  include/uapi/linux/videodev2.h                |  4 +
  29  4 files changed, 91 insertions(+)
  30  create mode 100644 Documentation/media/uapi/v4l/pixfmt-srggb14.rst
  31
  32 --- a/Documentation/media/uapi/v4l/pixfmt-bayer.rst
  33 +++ b/Documentation/media/uapi/v4l/pixfmt-bayer.rst
  34 @@ -34,5 +34,6 @@ orders. See also `the Wikipedia article
  35      pixfmt-srggb10-ipu3
  36      pixfmt-srggb12
  37      pixfmt-srggb12p
  38 +    pixfmt-srggb14
  39      pixfmt-srggb14p
  40      pixfmt-srggb16
  41 --- /dev/null
  42 +++ b/Documentation/media/uapi/v4l/pixfmt-srggb14.rst
  43 @@ -0,0 +1,82 @@
  44 +.. Permission is granted to copy, distribute and/or modify this
  45 +.. document under the terms of the GNU Free Documentation License,
  46 +.. Version 1.1 or any later version published by the Free Software
  47 +.. Foundation, with no Invariant Sections, no Front-Cover Texts
  48 +.. and no Back-Cover Texts. A copy of the license is included at
  49 +.. Documentation/media/uapi/fdl-appendix.rst.
  50 +..
  51 +.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
  52 +
  53 +.. _V4L2-PIX-FMT-SRGGB14:
  54 +.. _v4l2-pix-fmt-sbggr14:
  55 +.. _v4l2-pix-fmt-sgbrg14:
  56 +.. _v4l2-pix-fmt-sgrbg14:
  57 +
  58 +
  59 +***************************************************************************************************************************
  60 +V4L2_PIX_FMT_SRGGB14 ('RG14'), V4L2_PIX_FMT_SGRBG14 ('GR14'), V4L2_PIX_FMT_SGBRG14 ('GB14'), V4L2_PIX_FMT_SBGGR14 ('BG14'),
  61 +***************************************************************************************************************************
  62 +
  63 +
  64 +14-bit Bayer formats expanded to 16 bits
  65 +
  66 +
  67 +Description
  68 +===========
  69 +
  70 +These four pixel formats are raw sRGB / Bayer formats with 14 bits per
  71 +colour. Each sample is stored in a 16-bit word, with two unused high
  72 +bits filled with zeros. Each n-pixel row contains n/2 green samples
  73 +and n/2 blue or red samples, with alternating red and blue rows. Bytes
  74 +are stored in memory in little endian order. They are conventionally
  75 +described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an
  76 +example of a small V4L2_PIX_FMT_SBGGR14 image:
  77 +
  78 +**Byte Order.**
  79 +Each cell is one byte, the two most significant bits in the high bytes are
  80 +zero.
  81 +
  82 +
  83 +
  84 +.. flat-table::
  85 +    :header-rows:  0
  86 +    :stub-columns: 0
  87 +    :widths:       2 1 1 1 1 1 1 1 1
  88 +
  89 +
  90 +    * - start + 0:
  91 +      - B\ :sub:`00low`
  92 +      - B\ :sub:`00high`
  93 +      - G\ :sub:`01low`
  94 +      - G\ :sub:`01high`
  95 +      - B\ :sub:`02low`
  96 +      - B\ :sub:`02high`
  97 +      - G\ :sub:`03low`
  98 +      - G\ :sub:`03high`
  99 +    * - start + 8:
 100 +      - G\ :sub:`10low`
 101 +      - G\ :sub:`10high`
 102 +      - R\ :sub:`11low`
 103 +      - R\ :sub:`11high`
 104 +      - G\ :sub:`12low`
 105 +      - G\ :sub:`12high`
 106 +      - R\ :sub:`13low`
 107 +      - R\ :sub:`13high`
 108 +    * - start + 16:
 109 +      - B\ :sub:`20low`
 110 +      - B\ :sub:`20high`
 111 +      - G\ :sub:`21low`
 112 +      - G\ :sub:`21high`
 113 +      - B\ :sub:`22low`
 114 +      - B\ :sub:`22high`
 115 +      - G\ :sub:`23low`
 116 +      - G\ :sub:`23high`
 117 +    * - start + 24:
 118 +      - G\ :sub:`30low`
 119 +      - G\ :sub:`30high`
 120 +      - R\ :sub:`31low`
 121 +      - R\ :sub:`31high`
 122 +      - G\ :sub:`32low`
 123 +      - G\ :sub:`32high`
 124 +      - R\ :sub:`33low`
 125 +      - R\ :sub:`33high`
 126 --- a/drivers/media/v4l2-core/v4l2-ioctl.c
 127 +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
 128 @@ -1298,6 +1298,10 @@ static void v4l_fill_fmtdesc(struct v4l2
 129         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
 130         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
 131         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
 132 +       case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
 133 +       case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
 134 +       case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
 135 +       case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
 136         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
 137         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
 138         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
 139 --- a/include/uapi/linux/videodev2.h
 140 +++ b/include/uapi/linux/videodev2.h
 141 @@ -666,6 +666,10 @@ struct v4l2_pix_format {
 142  #define V4L2_PIX_FMT_SGBRG12P v4l2_fourcc('p', 'G', 'C', 'C')
 143  #define V4L2_PIX_FMT_SGRBG12P v4l2_fourcc('p', 'g', 'C', 'C')
 144  #define V4L2_PIX_FMT_SRGGB12P v4l2_fourcc('p', 'R', 'C', 'C')
 145 +#define V4L2_PIX_FMT_SBGGR14 v4l2_fourcc('B', 'G', '1', '4') /* 14  BGBG.. GRGR.. */
 146 +#define V4L2_PIX_FMT_SGBRG14 v4l2_fourcc('G', 'B', '1', '4') /* 14  GBGB.. RGRG.. */
 147 +#define V4L2_PIX_FMT_SGRBG14 v4l2_fourcc('G', 'R', '1', '4') /* 14  GRGR.. BGBG.. */
 148 +#define V4L2_PIX_FMT_SRGGB14 v4l2_fourcc('R', 'G', '1', '4') /* 14  RGRG.. GBGB.. */
 149         /* 14bit raw bayer packed, 7 bytes for every 4 pixels */
 150  #define V4L2_PIX_FMT_SBGGR14P v4l2_fourcc('p', 'B', 'E', 'E')
 151  #define V4L2_PIX_FMT_SGBRG14P v4l2_fourcc('p', 'G', 'E', 'E')