media: v4l: Add packed Bayer raw12 pixel formats

These formats are compressed 12-bit raw bayer formats with four different
pixel orders. They are similar to 10-bit variants. The formats added by
this patch are

	V4L2_PIX_FMT_SBGGR12P
	V4L2_PIX_FMT_SGBRG12P
	V4L2_PIX_FMT_SGRBG12P
	V4L2_PIX_FMT_SRGGB12P

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

2 files changed, 104 insertions, 0 deletions

diff --git a/Documentation/media/uapi/v4l/pixfmt-rgb.rst b/Documentation/media/uapi/v4l/pixfmt-rgb.rst
index b0f35136021e..4cc27195dc79 100644
--- a/Documentation/media/uapi/v4l/pixfmt-rgb.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-rgb.rst
@@ -17,4 +17,5 @@ RGB Formats
     pixfmt-srggb10alaw8
     pixfmt-srggb10dpcm8
     pixfmt-srggb12
+    pixfmt-srggb12p
     pixfmt-srggb16
diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb12p.rst b/Documentation/media/uapi/v4l/pixfmt-srggb12p.rst
new file mode 100644
index 000000000000..c0541e5acd01
--- /dev/null
+++ b/Documentation/media/uapi/v4l/pixfmt-srggb12p.rst
@@ -0,0 +1,103 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _V4L2-PIX-FMT-SRGGB12P:
+.. _v4l2-pix-fmt-sbggr12p:
+.. _v4l2-pix-fmt-sgbrg12p:
+.. _v4l2-pix-fmt-sgrbg12p:
+
+*******************************************************************************************************************************
+V4L2_PIX_FMT_SRGGB12P ('pRAA'), V4L2_PIX_FMT_SGRBG12P ('pgAA'), V4L2_PIX_FMT_SGBRG12P ('pGAA'), V4L2_PIX_FMT_SBGGR12P ('pBAA'),
+*******************************************************************************************************************************
+
+
+12-bit packed Bayer formats
+
+
+Description
+===========
+
+These four pixel formats are packed raw sRGB / Bayer formats with 12
+bits per colour. Every two consecutive samples are packed into three
+bytes. Each of the first two bytes contain the 8 high order bits of
+the pixels, and the third byte contains the four least significants
+bits of each pixel, in the same order.
+
+Each n-pixel row contains n/2 green samples and n/2 blue or red
+samples, with alternating green-red and green-blue rows. They are
+conventionally described as GRGR... BGBG..., RGRG... GBGB..., etc.
+Below is an example of a small V4L2_PIX_FMT_SBGGR12P image:
+
+**Byte Order.**
+Each cell is one byte.
+
+
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       2 1 1 1 1 1 1
+
+
+    -  .. row 1
+
+       -  start + 0:
+
+       -  B\ :sub:`00high`
+
+       -  G\ :sub:`01high`
+
+       -  G\ :sub:`01low`\ (bits 7--4) B\ :sub:`00low`\ (bits 3--0)
+
+       -  B\ :sub:`02high`
+
+       -  G\ :sub:`03high`
+
+       -  G\ :sub:`03low`\ (bits 7--4) B\ :sub:`02low`\ (bits 3--0)
+
+    -  .. row 2
+
+       -  start + 6:
+
+       -  G\ :sub:`10high`
+
+       -  R\ :sub:`11high`
+
+       -  R\ :sub:`11low`\ (bits 7--4) G\ :sub:`10low`\ (bits 3--0)
+
+       -  G\ :sub:`12high`
+
+       -  R\ :sub:`13high`
+
+       -  R\ :sub:`13low`\ (bits 3--2) G\ :sub:`12low`\ (bits 3--0)
+
+    -  .. row 3
+
+       -  start + 12:
+
+       -  B\ :sub:`20high`
+
+       -  G\ :sub:`21high`
+
+       -  G\ :sub:`21low`\ (bits 7--4) B\ :sub:`20low`\ (bits 3--0)
+
+       -  B\ :sub:`22high`
+
+       -  G\ :sub:`23high`
+
+       -  G\ :sub:`23low`\ (bits 7--4) B\ :sub:`22low`\ (bits 3--0)
+
+    -  .. row 4
+
+       -  start + 18:
+
+       -  G\ :sub:`30high`
+
+       -  R\ :sub:`31high`
+
+       -  R\ :sub:`31low`\ (bits 7--4) G\ :sub:`30low`\ (bits 3--0)
+
+       -  G\ :sub:`32high`
+
+       -  R\ :sub:`33high`
+
+       -  R\ :sub:`33low`\ (bits 3--2) G\ :sub:`32low`\ (bits 3--0)