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105 lines
3.9 KiB
Diff
105 lines
3.9 KiB
Diff
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From 202bd8f62e30ae4da7b591b09f21e8bcd5913846 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 25 Jun 2020 17:51:03 +0100
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Subject: [PATCH] media: Add a pixel format for MIPI packed 14bit luma
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only.
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This is the format used by monochrome 14bit image sensors.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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.../userspace-api/media/v4l/pixfmt-y14p.rst | 54 +++++++++++++++++++
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.../userspace-api/media/v4l/yuv-formats.rst | 1 +
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drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
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include/uapi/linux/videodev2.h | 1 +
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4 files changed, 57 insertions(+)
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create mode 100644 Documentation/userspace-api/media/v4l/pixfmt-y14p.rst
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--- /dev/null
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+++ b/Documentation/userspace-api/media/v4l/pixfmt-y14p.rst
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@@ -0,0 +1,54 @@
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+.. Permission is granted to copy, distribute and/or modify this
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+.. document under the terms of the GNU Free Documentation License,
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+.. Version 1.1 or any later version published by the Free Software
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+.. Foundation, with no Invariant Sections, no Front-Cover Texts
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+.. and no Back-Cover Texts. A copy of the license is included at
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+.. Documentation/media/uapi/fdl-appendix.rst.
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+..
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+.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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+
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+.. _V4L2-PIX-FMT-Y14P:
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+
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+**************************
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+V4L2_PIX_FMT_Y14P ('Y14P')
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+**************************
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+
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+Grey-scale image as a MIPI RAW14 packed array
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+
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+
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+Description
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+===========
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+
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+This is a packed grey-scale image format with a depth of 14 bits per
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+pixel. Every four consecutive samples are packed into seven bytes. Each
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+of the first four bytes contain the eight high order bits of the pixels,
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+and the three following bytes contains the six least significants bits of
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+each pixel, in the same order.
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+
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+**Byte Order.**
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+Each cell is one byte.
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+
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+.. 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}|
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+
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+.. flat-table::
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+ :header-rows: 0
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+ :stub-columns: 0
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+ :widths: 2 1 1 1 1 3 3 3
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+
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+
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+ - - start + 0:
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+ - Y'\ :sub:`00high`
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+ - Y'\ :sub:`01high`
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+ - Y'\ :sub:`02high`
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+ - Y'\ :sub:`03high`
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+ - Y'\ :sub:`01low bits 1--0`\ (bits 7--6)
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+
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+ Y'\ :sub:`00low bits 5--0`\ (bits 5--0)
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+
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+ - Y'\ :sub:`02low bits 3--0`\ (bits 7--4)
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+
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+ Y'\ :sub:`01low bits 5--2`\ (bits 3--0)
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+
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+ - Y'\ :sub:`03low bits 5--0`\ (bits 7--2)
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+
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+ Y'\ :sub:`02low bits 5--4`\ (bits 1--0)
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--- a/Documentation/userspace-api/media/v4l/yuv-formats.rst
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+++ b/Documentation/userspace-api/media/v4l/yuv-formats.rst
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@@ -268,6 +268,7 @@ image.
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pixfmt-yuv-planar
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pixfmt-yuv-luma
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pixfmt-y12p
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+ pixfmt-y14p
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pixfmt-y8i
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pixfmt-y12i
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pixfmt-uv8
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--- a/drivers/media/v4l2-core/v4l2-ioctl.c
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+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
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@@ -1315,6 +1315,7 @@ static void v4l_fill_fmtdesc(struct v4l2
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case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
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case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
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case V4L2_PIX_FMT_Y12P: descr = "12-bit Greyscale (MIPI Packed)"; break;
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+ case V4L2_PIX_FMT_Y14P: descr = "14-bit Greyscale (MIPI Packed)"; break;
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case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break;
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case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
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case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
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--- a/include/uapi/linux/videodev2.h
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+++ b/include/uapi/linux/videodev2.h
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@@ -596,6 +596,7 @@ struct v4l2_pix_format {
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#define V4L2_PIX_FMT_Y10BPACK v4l2_fourcc('Y', '1', '0', 'B') /* 10 Greyscale bit-packed */
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#define V4L2_PIX_FMT_Y10P v4l2_fourcc('Y', '1', '0', 'P') /* 10 Greyscale, MIPI RAW10 packed */
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#define V4L2_PIX_FMT_Y12P v4l2_fourcc('Y', '1', '2', 'P') /* 12 Greyscale, MIPI RAW12 packed */
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+#define V4L2_PIX_FMT_Y14P v4l2_fourcc('Y', '1', '4', 'P') /* 14 Greyscale, MIPI RAW12 packed */
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#define V4L2_PIX_FMT_IPU3_Y10 v4l2_fourcc('i', 'p', '3', 'y') /* IPU3 packed 10-bit greyscale */
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/* Palette formats */
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