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media: uapi: Add meta formats for PiSP FE config and stats

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Add two meta formats for PiSP FE: V4L2_META_FMT_RPI_FE_CFG and
V4L2_META_FMT_RPI_FE_STATS. The former is used to provide configuration
for the FE and the latter is used to read the statistics from the FE.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Tomi Valkeinen 2024-10-03 13:31:10 +03:00 committed by Mauro Carvalho Chehab
parent a23b2b21b0
commit 6390834c6f
4 changed files with 44 additions and 0 deletions
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1
Documentation/userspace-api/media/v4l/meta-formats.rst
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@ -16,6 +16,7 @@ These formats are used for the :ref:`metadata` interface only.
metafmt-generic
metafmt-intel-ipu3
metafmt-pisp-be
metafmt-pisp-fe
metafmt-rkisp1
metafmt-uvc
metafmt-vivid

39
Documentation/userspace-api/media/v4l/metafmt-pisp-fe.rst Normal file
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@ -0,0 +1,39 @@
.. SPDX-License-Identifier: GPL-2.0
.. _v4l2-meta-fmt-rpi-fe-cfg:
************************
V4L2_META_FMT_RPI_FE_CFG
************************
Raspberry Pi PiSP Front End configuration format
================================================
The Raspberry Pi PiSP Front End image signal processor is configured by
userspace by providing a buffer of configuration parameters to the
`rp1-cfe-fe-config` output video device node using the
:c:type:`v4l2_meta_format` interface.
The `Raspberry Pi PiSP technical specification
<https://datasheets.raspberrypi.com/camera/raspberry-pi-image-signal-processor-specification.pdf>`_
provide detailed description of the Front End configuration and programming
model.
.. _v4l2-meta-fmt-rpi-fe-stats:
**************************
V4L2_META_FMT_RPI_FE_STATS
**************************
Raspberry Pi PiSP Front End statistics format
=============================================
The Raspberry Pi PiSP Front End image signal processor provides statistics data
by writing to a buffer provided via the `rp1-cfe-fe-stats` capture video device
node using the
:c:type:`v4l2_meta_format` interface.
The `Raspberry Pi PiSP technical specification
<https://datasheets.raspberrypi.com/camera/raspberry-pi-image-signal-processor-specification.pdf>`_
provide detailed description of the Front End configuration and programming
model.

2
drivers/media/v4l2-core/v4l2-ioctl.c
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@ -1468,6 +1468,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break;
case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break;
case V4L2_META_FMT_RPI_BE_CFG: descr = "RPi PiSP BE Config format"; break;
case V4L2_META_FMT_RPI_FE_CFG: descr = "RPi PiSP FE Config format"; break;
case V4L2_META_FMT_RPI_FE_STATS: descr = "RPi PiSP FE Statistics format"; break;
case V4L2_META_FMT_GENERIC_8: descr = "8-bit Generic Metadata"; break;
case V4L2_META_FMT_GENERIC_CSI2_10: descr = "8-bit Generic Meta, 10b CSI-2"; break;
case V4L2_META_FMT_GENERIC_CSI2_12: descr = "8-bit Generic Meta, 12b CSI-2"; break;

2
include/uapi/linux/videodev2.h
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@ -860,6 +860,8 @@ struct v4l2_pix_format {
/* Vendor specific - used for RaspberryPi PiSP */
#define V4L2_META_FMT_RPI_BE_CFG v4l2_fourcc('R', 'P', 'B', 'C') /* PiSP BE configuration */
#define V4L2_META_FMT_RPI_FE_CFG v4l2_fourcc('R', 'P', 'F', 'C') /* PiSP FE configuration */
#define V4L2_META_FMT_RPI_FE_STATS v4l2_fourcc('R', 'P', 'F', 'S') /* PiSP FE stats */
#ifdef __KERNEL__
/*