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132 lines
4.4 KiB
Diff
132 lines
4.4 KiB
Diff
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From 363792f3fff5f4f79e2ac08ccfcc21c05216787a Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Daniel=20Gl=C3=B6ckner?= <dg@emlix.com>
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Date: Mon, 24 Feb 2020 18:52:21 +0100
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Subject: [PATCH] media: v4l: Add 14-bit raw greyscale pixel format
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Commit ae9753a04cfc8e41262605875e531b6ea5e3d0ac upstream.
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The new format is called V4L2_PIX_FMT_Y14. Like V4L2_PIX_FMT_Y10 and
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V4L2_PIX_FMT_Y12 it is stored in two bytes per pixel but has only two
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unused bits at the top.
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Signed-off-by: Daniel Glöckner <dg@emlix.com>
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Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
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Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
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Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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---
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Documentation/media/uapi/v4l/pixfmt-y14.rst | 72 ++++++++++++++++++++
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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, 75 insertions(+)
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create mode 100644 Documentation/media/uapi/v4l/pixfmt-y14.rst
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--- /dev/null
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+++ b/Documentation/media/uapi/v4l/pixfmt-y14.rst
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@@ -0,0 +1,72 @@
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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-Y14:
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+
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+*************************
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+V4L2_PIX_FMT_Y14 ('Y14 ')
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+*************************
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+
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+
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+Grey-scale image
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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 grey-scale image with a depth of 14 bits per pixel. Pixels are
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+stored in 16-bit words with unused high bits padded with 0. The least
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+significant byte is stored at lower memory addresses (little-endian).
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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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+
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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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+
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+ * - start + 0:
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+ - Y'\ :sub:`00low`
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+ - Y'\ :sub:`00high`
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+ - Y'\ :sub:`01low`
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+ - Y'\ :sub:`01high`
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+ - Y'\ :sub:`02low`
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+ - Y'\ :sub:`02high`
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+ - Y'\ :sub:`03low`
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+ - Y'\ :sub:`03high`
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+ * - start + 8:
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+ - Y'\ :sub:`10low`
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+ - Y'\ :sub:`10high`
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+ - Y'\ :sub:`11low`
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+ - Y'\ :sub:`11high`
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+ - Y'\ :sub:`12low`
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+ - Y'\ :sub:`12high`
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+ - Y'\ :sub:`13low`
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+ - Y'\ :sub:`13high`
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+ * - start + 16:
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+ - Y'\ :sub:`20low`
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+ - Y'\ :sub:`20high`
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+ - Y'\ :sub:`21low`
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+ - Y'\ :sub:`21high`
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+ - Y'\ :sub:`22low`
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+ - Y'\ :sub:`22high`
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+ - Y'\ :sub:`23low`
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+ - Y'\ :sub:`23high`
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+ * - start + 24:
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+ - Y'\ :sub:`30low`
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+ - Y'\ :sub:`30high`
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+ - Y'\ :sub:`31low`
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+ - Y'\ :sub:`31high`
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+ - Y'\ :sub:`32low`
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+ - Y'\ :sub:`32high`
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+ - Y'\ :sub:`33low`
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+ - Y'\ :sub:`33high`
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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-y14
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pixfmt-y10b
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pixfmt-y10p
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pixfmt-y16
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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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@@ -1212,6 +1212,7 @@ static void v4l_fill_fmtdesc(struct v4l2
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case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
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case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
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case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
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+ case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break;
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case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
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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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--- a/include/uapi/linux/videodev2.h
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+++ b/include/uapi/linux/videodev2.h
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@@ -569,6 +569,7 @@ struct v4l2_pix_format {
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#define V4L2_PIX_FMT_Y6 v4l2_fourcc('Y', '0', '6', ' ') /* 6 Greyscale */
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#define V4L2_PIX_FMT_Y10 v4l2_fourcc('Y', '1', '0', ' ') /* 10 Greyscale */
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#define V4L2_PIX_FMT_Y12 v4l2_fourcc('Y', '1', '2', ' ') /* 12 Greyscale */
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+#define V4L2_PIX_FMT_Y14 v4l2_fourcc('Y', '1', '4', ' ') /* 14 Greyscale */
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#define V4L2_PIX_FMT_Y16 v4l2_fourcc('Y', '1', '6', ' ') /* 16 Greyscale */
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#define V4L2_PIX_FMT_Y16_BE v4l2_fourcc_be('Y', '1', '6', ' ') /* 16 Greyscale BE */
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