2021-02-18 17:04:33 +00:00
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From 14ed8669ba80f2bb9a5f0d6be51052813d4a75e8 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 7 May 2020 16:59:03 +0100
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Subject: [PATCH] media: Add a pixel format for MIPI packed 12bit
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luma only.
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This is the format used by monochrome 12bit image sensors.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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Documentation/media/uapi/v4l/pixfmt-y12p.rst | 45 ++++++++++++++++++++
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Documentation/media/uapi/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, 48 insertions(+)
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create mode 100644 Documentation/media/uapi/v4l/pixfmt-y12p.rst
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--- /dev/null
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+++ b/Documentation/media/uapi/v4l/pixfmt-y12p.rst
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@@ -0,0 +1,45 @@
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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-Y12P:
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+
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+******************************
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+V4L2_PIX_FMT_Y12P ('Y12P')
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+******************************
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+
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+Grey-scale image as a MIPI RAW12 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 12 bits per
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+pixel. Two consecutive pixels are packed into 3 bytes. The first 2 bytes
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+contain the 8 high order bits of the pixels, and the 3rd byte contains the 4
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+least significants bits of 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{2.2cm}|p{1.2cm}|p{1.2cm}|p{3.1cm}|
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+
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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
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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:`01low`\ (bits 7--4)
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+
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+ Y'\ :sub:`00low`\ (bits 3--0)
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+
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--- a/Documentation/media/uapi/v4l/yuv-formats.rst
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+++ b/Documentation/media/uapi/v4l/yuv-formats.rst
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@@ -35,6 +35,7 @@ to brightness information.
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pixfmt-grey
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pixfmt-y10
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pixfmt-y12
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+ pixfmt-y12p
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pixfmt-y14
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pixfmt-y10b
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pixfmt-y10p
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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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2021-12-05 16:43:36 +00:00
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@@ -1235,6 +1235,7 @@ static void v4l_fill_fmtdesc(struct v4l2
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2021-02-18 17:04:33 +00:00
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case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
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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_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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case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; 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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@@ -576,6 +576,7 @@ struct v4l2_pix_format {
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/* Grey bit-packed formats */
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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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/* Palette formats */
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#define V4L2_PIX_FMT_PAL8 v4l2_fourcc('P', 'A', 'L', '8') /* 8 8-bit palette */
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