From 363792f3fff5f4f79e2ac08ccfcc21c05216787a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gl=C3=B6ckner?= Date: Mon, 24 Feb 2020 18:52:21 +0100 Subject: [PATCH] media: v4l: Add 14-bit raw greyscale pixel format MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit ae9753a04cfc8e41262605875e531b6ea5e3d0ac upstream. The new format is called V4L2_PIX_FMT_Y14. Like V4L2_PIX_FMT_Y10 and V4L2_PIX_FMT_Y12 it is stored in two bytes per pixel but has only two unused bits at the top. Signed-off-by: Daniel Glöckner Signed-off-by: Hans Verkuil Acked-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- Documentation/media/uapi/v4l/pixfmt-y14.rst | 72 ++++++++++++++++++++ Documentation/media/uapi/v4l/yuv-formats.rst | 1 + drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/uapi/linux/videodev2.h | 1 + 4 files changed, 75 insertions(+) create mode 100644 Documentation/media/uapi/v4l/pixfmt-y14.rst --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-y14.rst @@ -0,0 +1,72 @@ +.. Permission is granted to copy, distribute and/or modify this +.. document under the terms of the GNU Free Documentation License, +.. Version 1.1 or any later version published by the Free Software +.. Foundation, with no Invariant Sections, no Front-Cover Texts +.. and no Back-Cover Texts. A copy of the license is included at +.. Documentation/media/uapi/fdl-appendix.rst. +.. +.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections + +.. _V4L2-PIX-FMT-Y14: + +************************* +V4L2_PIX_FMT_Y14 ('Y14 ') +************************* + + +Grey-scale image + + +Description +=========== + +This is a grey-scale image with a depth of 14 bits per pixel. Pixels are +stored in 16-bit words with unused high bits padded with 0. The least +significant byte is stored at lower memory addresses (little-endian). + +**Byte Order.** +Each cell is one byte. + + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + * - start + 0: + - Y'\ :sub:`00low` + - Y'\ :sub:`00high` + - Y'\ :sub:`01low` + - Y'\ :sub:`01high` + - Y'\ :sub:`02low` + - Y'\ :sub:`02high` + - Y'\ :sub:`03low` + - Y'\ :sub:`03high` + * - start + 8: + - Y'\ :sub:`10low` + - Y'\ :sub:`10high` + - Y'\ :sub:`11low` + - Y'\ :sub:`11high` + - Y'\ :sub:`12low` + - Y'\ :sub:`12high` + - Y'\ :sub:`13low` + - Y'\ :sub:`13high` + * - start + 16: + - Y'\ :sub:`20low` + - Y'\ :sub:`20high` + - Y'\ :sub:`21low` + - Y'\ :sub:`21high` + - Y'\ :sub:`22low` + - Y'\ :sub:`22high` + - Y'\ :sub:`23low` + - Y'\ :sub:`23high` + * - start + 24: + - Y'\ :sub:`30low` + - Y'\ :sub:`30high` + - Y'\ :sub:`31low` + - Y'\ :sub:`31high` + - Y'\ :sub:`32low` + - Y'\ :sub:`32high` + - Y'\ :sub:`33low` + - Y'\ :sub:`33high` --- a/Documentation/media/uapi/v4l/yuv-formats.rst +++ b/Documentation/media/uapi/v4l/yuv-formats.rst @@ -35,6 +35,7 @@ to brightness information. pixfmt-grey pixfmt-y10 pixfmt-y12 + pixfmt-y14 pixfmt-y10b pixfmt-y10p pixfmt-y16 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1230,6 +1230,7 @@ static void v4l_fill_fmtdesc(struct v4l2 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; + case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -569,6 +569,7 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_Y6 v4l2_fourcc('Y', '0', '6', ' ') /* 6 Greyscale */ #define V4L2_PIX_FMT_Y10 v4l2_fourcc('Y', '1', '0', ' ') /* 10 Greyscale */ #define V4L2_PIX_FMT_Y12 v4l2_fourcc('Y', '1', '2', ' ') /* 12 Greyscale */ +#define V4L2_PIX_FMT_Y14 v4l2_fourcc('Y', '1', '4', ' ') /* 14 Greyscale */ #define V4L2_PIX_FMT_Y16 v4l2_fourcc('Y', '1', '6', ' ') /* 16 Greyscale */ #define V4L2_PIX_FMT_Y16_BE v4l2_fourcc_be('Y', '1', '6', ' ') /* 16 Greyscale BE */