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Message-ID: <Z02jXu7dWhjSqX/G@duo.ucw.cz>
Date: Mon, 2 Dec 2024 13:09:02 +0100
From: Pavel Machek <pavel@...x.de>
To: Sasha Levin <sashal@...nel.org>
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
Dmitry Perchanov <dmitry.perchanov@...el.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Hans Verkuil <hverkuil-cisco@...all.nl>, mchehab@...nel.org,
hverkuil@...all.nl, sakari.ailus@...ux.intel.com,
jacopo.mondi@...asonboard.com, naush@...pberrypi.com,
jeanmichel.hautbois@...asonboard.com,
benjamin.gaignard@...labora.com, linux-media@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 5.10 1/6] media: v4l: Add luma 16-bit interlaced
pixel format
Hi!
> From: Dmitry Perchanov <dmitry.perchanov@...el.com>
>
> [ Upstream commit a8f2cdd27d114ed6c3354a0e39502e6d56215804 ]
>
> The formats added by this patch are:
>
> V4L2_PIX_FMT_Y16I
>
> Interlaced lumina format primary use in RealSense Depth cameras with
> stereo stream for left and right image sensors.
This will add unneeded defines to -stable.
Best regards,
Pavel
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-y16i.rst
> @@ -0,0 +1,73 @@
> +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
> +
> +.. _V4L2-PIX-FMT-Y16I:
> +
> +**************************
> +V4L2_PIX_FMT_Y16I ('Y16I')
> +**************************
> +
> +Interleaved grey-scale image, e.g. from a stereo-pair
> +
> +
> +Description
> +===========
> +
> +This is a grey-scale image with a depth of 16 bits per pixel, but with pixels
> +from 2 sources interleaved and unpacked. Each pixel is stored in a 16-bit word
> +in the little-endian order. The first pixel is from the left source.
> +
> +**Pixel unpacked representation.**
> +Left/Right pixels 16-bit unpacked - 16-bit for each interleaved pixel.
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> +
> + * - Y'\ :sub:`0L[7:0]`
> + - Y'\ :sub:`0L[15:8]`
> + - Y'\ :sub:`0R[7:0]`
> + - Y'\ :sub:`0R[15:8]`
> +
> +**Byte Order.**
> +Each cell is one byte.
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> +
> + * - start + 0:
> + - Y'\ :sub:`00Llow`
> + - Y'\ :sub:`00Lhigh`
> + - Y'\ :sub:`00Rlow`
> + - Y'\ :sub:`00Rhigh`
> + - Y'\ :sub:`01Llow`
> + - Y'\ :sub:`01Lhigh`
> + - Y'\ :sub:`01Rlow`
> + - Y'\ :sub:`01Rhigh`
> + * - start + 8:
> + - Y'\ :sub:`10Llow`
> + - Y'\ :sub:`10Lhigh`
> + - Y'\ :sub:`10Rlow`
> + - Y'\ :sub:`10Rhigh`
> + - Y'\ :sub:`11Llow`
> + - Y'\ :sub:`11Lhigh`
> + - Y'\ :sub:`11Rlow`
> + - Y'\ :sub:`11Rhigh`
> + * - start + 16:
> + - Y'\ :sub:`20Llow`
> + - Y'\ :sub:`20Lhigh`
> + - Y'\ :sub:`20Rlow`
> + - Y'\ :sub:`20Rhigh`
> + - Y'\ :sub:`21Llow`
> + - Y'\ :sub:`21Lhigh`
> + - Y'\ :sub:`21Rlow`
> + - Y'\ :sub:`21Rhigh`
> + * - start + 24:
> + - Y'\ :sub:`30Llow`
> + - Y'\ :sub:`30Lhigh`
> + - Y'\ :sub:`30Rlow`
> + - Y'\ :sub:`30Rhigh`
> + - Y'\ :sub:`31Llow`
> + - Y'\ :sub:`31Lhigh`
> + - Y'\ :sub:`31Rlow`
> + - Y'\ :sub:`31Rhigh`
> diff --git a/Documentation/userspace-api/media/v4l/yuv-formats.rst b/Documentation/userspace-api/media/v4l/yuv-formats.rst
> index 4a05a105a9e6c..d49e47137466b 100644
> --- a/Documentation/userspace-api/media/v4l/yuv-formats.rst
> +++ b/Documentation/userspace-api/media/v4l/yuv-formats.rst
> @@ -35,6 +35,7 @@ to brightness information.
> pixfmt-y16-be
> pixfmt-y8i
> pixfmt-y12i
> + pixfmt-y16i
> pixfmt-uv8
> pixfmt-yuyv
> pixfmt-uyvy
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 6d6d30dbbe68b..97f61e564babf 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1303,6 +1303,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> 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_Y16I: descr = "Interleaved 16-bit Greyscale"; break;
> case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
> case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
> case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 1bbd81f031fe0..579beac6f4754 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -735,6 +735,7 @@ struct v4l2_pix_format {
> #define V4L2_PIX_FMT_S5C_UYVY_JPG v4l2_fourcc('S', '5', 'C', 'I') /* S5C73M3 interleaved UYVY/JPEG */
> #define V4L2_PIX_FMT_Y8I v4l2_fourcc('Y', '8', 'I', ' ') /* Greyscale 8-bit L/R interleaved */
> #define V4L2_PIX_FMT_Y12I v4l2_fourcc('Y', '1', '2', 'I') /* Greyscale 12-bit L/R interleaved */
> +#define V4L2_PIX_FMT_Y16I v4l2_fourcc('Y', '1', '6', 'I') /* Greyscale 16-bit L/R interleaved */
> #define V4L2_PIX_FMT_Z16 v4l2_fourcc('Z', '1', '6', ' ') /* Depth data 16-bit */
> #define V4L2_PIX_FMT_MT21C v4l2_fourcc('M', 'T', '2', '1') /* Mediatek compressed block mode */
> #define V4L2_PIX_FMT_INZI v4l2_fourcc('I', 'N', 'Z', 'I') /* Intel Planar Greyscale 10-bit and Depth 16-bit */
--
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