diff options
| author | Daniel Scally <dan.scally@ideasonboard.com> | 2025-11-11 16:15:55 +0000 |
|---|---|---|
| committer | Hans Verkuil <hverkuil+cisco@kernel.org> | 2025-11-14 15:48:49 +0100 |
| commit | b35d9f3e301dce2c822704ee4d95c0337ed9fb14 (patch) | |
| tree | 356b3a89714f816a3dfceafe55008a4c75a3c46c /Documentation/userspace-api | |
| parent | 5d1f7403d681f8a4664c1b4072798eb236ae82be (diff) | |
Documentation: media: mali-c55: Add Statistics documentation
Add documentation explaining the ability to capture statistics from
the mali-c55 driver's new V4L2 device, as well as the various tap
points from which those statistics can be drawn in the ISP's
processing flow. Additionally add a page detailing the new V4L2
meta format for the mali-c55 statistics.
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Nayden Kanchev <nayden.kanchev@arm.com>
Co-developed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/meta-formats.rst | 1 | ||||
| -rw-r--r-- | Documentation/userspace-api/media/v4l/metafmt-arm-mali-c55.rst | 29 |
2 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/meta-formats.rst b/Documentation/userspace-api/media/v4l/meta-formats.rst index 7b758ea9eb4a..3e0cab153f0a 100644 --- a/Documentation/userspace-api/media/v4l/meta-formats.rst +++ b/Documentation/userspace-api/media/v4l/meta-formats.rst @@ -13,6 +13,7 @@ These formats are used for the :ref:`metadata` interface only. .. toctree:: :maxdepth: 1 + metafmt-arm-mali-c55 metafmt-c3-isp metafmt-d4xx metafmt-generic diff --git a/Documentation/userspace-api/media/v4l/metafmt-arm-mali-c55.rst b/Documentation/userspace-api/media/v4l/metafmt-arm-mali-c55.rst new file mode 100644 index 000000000000..0bda9740a6be --- /dev/null +++ b/Documentation/userspace-api/media/v4l/metafmt-arm-mali-c55.rst @@ -0,0 +1,29 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. _v4l2-meta-fmt-mali-c55-stats: + +************************************* +V4L2_META_FMT_MALI_C55_STATS ('C55S') +************************************* + +3A Statistics +============= + +The ISP device collects different statistics over an input bayer frame. Those +statistics can be obtained by userspace from the +:ref:`mali-c55 3a stats <mali-c55-3a-stats>` metadata capture video node, using +the :c:type:`v4l2_meta_format` interface. The buffer contains a single instance +of the C structure :c:type:`mali_c55_stats_buffer` defined in +``mali-c55-config.h``, so the structure can be obtained from the buffer by: + +.. code-block:: C + + struct mali_c55_stats_buffer *stats = + (struct mali_c55_stats_buffer *)buf; + +For details of the statistics see :c:type:`mali_c55_stats_buffer`. + +Arm Mali-C55 uAPI data types +============================ + +.. kernel-doc:: include/uapi/linux/media/arm/mali-c55-config.h |