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authorDaniel Glöckner <dg@emlix.com>2020-02-24 18:52:21 +0100
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-03-20 09:00:56 +0100
commitae9753a04cfc8e41262605875e531b6ea5e3d0ac (patch)
tree6d02ea29452d5223b819aecf3c618d4dd26d3891
parentd12127ed0e18192491c2508caae45bb19c2f8fdd (diff)
media: v4l: Add 14-bit raw greyscale pixel format
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 <dg@emlix.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
-rw-r--r--Documentation/media/uapi/v4l/pixfmt-y14.rst72
-rw-r--r--Documentation/media/uapi/v4l/yuv-formats.rst1
-rw-r--r--drivers/media/v4l2-core/v4l2-ioctl.c1
-rw-r--r--include/uapi/linux/videodev2.h1
4 files changed, 75 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/pixfmt-y14.rst b/Documentation/media/uapi/v4l/pixfmt-y14.rst
new file mode 100644
index 000000000000..5c260f8da088
--- /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`
diff --git a/Documentation/media/uapi/v4l/yuv-formats.rst b/Documentation/media/uapi/v4l/yuv-formats.rst
index 867470e5f9e1..3b259e31b7a1 100644
--- 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
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 00e6ff847659..b2ef8e60ea7d 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1222,6 +1222,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
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;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4c276d79d2d0..9817b7e2c968 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -565,6 +565,7 @@ 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 */

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