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media: v4l: Add luma 16-bit interlaced pixel format

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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.

Signed-off-by: Dmitry Perchanov <dmitry.perchanov@intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/568efbd75290e286b8ad9e7347b5f43745121020.camel@intel.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Dmitry Perchanov 2024-08-26 16:04:23 +03:00 committed by Hans Verkuil
parent 1b4420bdfa
commit a8f2cdd27d
4 changed files with 76 additions and 0 deletions
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73
Documentation/userspace-api/media/v4l/pixfmt-y16i.rst Normal file
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@ -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`

1
Documentation/userspace-api/media/v4l/yuv-formats.rst
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@ -269,5 +269,6 @@ image.
pixfmt-yuv-luma
pixfmt-y8i
pixfmt-y12i
pixfmt-y16i
pixfmt-uv8
pixfmt-m420

1
drivers/media/v4l2-core/v4l2-ioctl.c
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@ -1327,6 +1327,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_Y14P: descr = "14-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;

1
include/uapi/linux/videodev2.h
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@ -798,6 +798,7 @@ 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_MM21 v4l2_fourcc('M', 'M', '2', '1') /* Mediatek 8-bit block mode, two non-contiguous planes */