linux-kernel - [PATCH 2/2] media: v4l: Add new 10-bit packed grayscale format

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Message-Id: <1524829239-4664-3-git-send-email-todor.tomov@linaro.org>
Date:   Fri, 27 Apr 2018 14:40:39 +0300
From:   Todor Tomov <todor.tomov@...aro.org>
To:     mchehab@...nel.org, hverkuil@...all.nl, sakari.ailus@....fi,
        laurent.pinchart@...asonboard.com, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Todor Tomov <todor.tomov@...aro.org>
Subject: [PATCH 2/2] media: v4l: Add new 10-bit packed grayscale format

The new format will be called V4L2_PIX_FMT_Y10P.
It is similar to the V4L2_PIX_FMT_SBGGR10P family formats
but V4L2_PIX_FMT_Y10P is a grayscale format.

Signed-off-by: Todor Tomov <todor.tomov@...aro.org>
---
 Documentation/media/uapi/v4l/pixfmt-y10p.rst | 31 ++++++++++++++++++++++++++++
 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, 34 insertions(+)
 create mode 100644 Documentation/media/uapi/v4l/pixfmt-y10p.rst

diff --git a/Documentation/media/uapi/v4l/pixfmt-y10p.rst b/Documentation/media/uapi/v4l/pixfmt-y10p.rst
new file mode 100644
index 0000000..0018fe7
--- /dev/null
+++ b/Documentation/media/uapi/v4l/pixfmt-y10p.rst
@@ -0,0 +1,31 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _V4L2-PIX-FMT-Y10P:
+
+******************************
+V4L2_PIX_FMT_Y10P ('Y10P')
+******************************
+
+Grey-scale image as a MIPI RAW10 packed array
+
+
+Description
+===========
+
+This is a packed grey-scale image format with a depth of 10 bits per
+pixel. Every four consecutive pixels are packed into 5 bytes. Each of
+the first 4 bytes contain the 8 high order bits of the pixels, and
+the 5th byte contains the 2 least significants bits of each pixel,
+in the same order.
+
+**Bit-packed representation.**
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+
+    * - Y'\ :sub:`00[9:2]`
+      - Y'\ :sub:`01[9:2]`
+      - Y'\ :sub:`02[9:2]`
+      - Y'\ :sub:`03[9:2]`
+      - Y'\ :sub:`03[1:0]`\ Y'\ :sub:`02[1:0]`\ Y'\ :sub:`01[1:0]`\ Y'\ :sub:`00[1:0]`
diff --git a/Documentation/media/uapi/v4l/yuv-formats.rst b/Documentation/media/uapi/v4l/yuv-formats.rst
index 3334ea4..9ab0592 100644
--- a/Documentation/media/uapi/v4l/yuv-formats.rst
+++ b/Documentation/media/uapi/v4l/yuv-formats.rst
@@ -29,6 +29,7 @@ to brightness information.
     pixfmt-y10
     pixfmt-y12
     pixfmt-y10b
+    pixfmt-y10p
     pixfmt-y16
     pixfmt-y16-be
     pixfmt-y8i
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index f48c505..bdf2399 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1147,6 +1147,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	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;
+	case V4L2_PIX_FMT_Y10P:		descr = "10-bit Greyscale (MIPI Packed)"; break;
 	case V4L2_PIX_FMT_Y8I:		descr = "Interleaved 8-bit Greyscale"; break;
 	case V4L2_PIX_FMT_Y12I:		descr = "Interleaved 12-bit Greyscale"; break;
 	case V4L2_PIX_FMT_Z16:		descr = "16-bit Depth"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 600877b..b24ab720 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -522,6 +522,7 @@ struct v4l2_pix_format {
 
 /* Grey bit-packed formats */
 #define V4L2_PIX_FMT_Y10BPACK    v4l2_fourcc('Y', '1', '0', 'B') /* 10  Greyscale bit-packed */
+#define V4L2_PIX_FMT_Y10P    v4l2_fourcc('Y', '1', '0', 'P') /* 10  Greyscale, MIPI RAW10 packed */
 
 /* Palette formats */
 #define V4L2_PIX_FMT_PAL8    v4l2_fourcc('P', 'A', 'L', '8') /*  8  8-bit palette */
-- 
2.7.4