linux-kernel - [PATCH v3 8/9] Documentation: media: add documentation file metafmt-c3-isp.rst

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Message-Id: <20240918-c3isp-v3-8-f774a39e6774@amlogic.com>
Date: Wed, 18 Sep 2024 14:07:19 +0800
From: Keke Li via B4 Relay <devnull+keke.li.amlogic.com@...nel.org>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, kieran.bingham@...asonboard.com, 
 laurent.pinchart@...asonboard.com, dan.scally@...asonboard.com, 
 Keke Li <keke.li@...ogic.com>
Subject: [PATCH v3 8/9] Documentation: media: add documentation file
 metafmt-c3-isp.rst

From: Keke Li <keke.li@...ogic.com>

Add the file 'metafmt-c3-isp.rst' that documents
the meta format of c3-isp.

Signed-off-by: Keke Li <keke.li@...ogic.com>
---
 .../userspace-api/media/v4l/meta-formats.rst       |  1 +
 .../userspace-api/media/v4l/metafmt-c3-isp.rst     | 39 ++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/meta-formats.rst b/Documentation/userspace-api/media/v4l/meta-formats.rst
index c6e56b5888bc..3a420747f6e7 100644
--- a/Documentation/userspace-api/media/v4l/meta-formats.rst
+++ b/Documentation/userspace-api/media/v4l/meta-formats.rst
@@ -12,6 +12,7 @@ These formats are used for the :ref:`metadata` interface only.
 .. toctree::
     :maxdepth: 1
 
+    metafmt-c3-isp
     metafmt-d4xx
     metafmt-generic
     metafmt-intel-ipu3
diff --git a/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst b/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst
new file mode 100644
index 000000000000..bbaf3542c1ca
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst
@@ -0,0 +1,39 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR MIT)
+
+.. _v4l2-meta-fmt-c3isp-stats:
+.. _v4l2-meta-fmt-c3isp-params:
+
+***********************************************************************
+V4L2_META_FMT_C3ISP_STATS ('CSTS'), V4L2_META_FMT_C3ISP_PARAMS ('CPRM')
+***********************************************************************
+
+.. c3_isp_stats_info
+
+3A statistics
+=============
+
+The C3 ISP can collect different statistics over an input Bayer frame.
+Those statistics are obtained from the "isp-stats" metadata capture video nodes,
+using the :c:type:`v4l2_meta_format` interface.
+They are formatted as described by the :c:type:`c3_isp_stats_info` structure.
+
+The statistics collected are  Auto-white balance,
+Auto-exposure and Auto-focus information.
+
+.. c3_isp_params_buffer
+
+Pipeline parameters
+===================
+
+The pipeline parameters are passed to the "isp-params" metadata
+output video nodes, using the :c:type:`v4l2_meta_format` interface. They are
+formatted as described by the :c:type:`c3_isp_params_buffer` structure.
+
+The structure c3_isp_params_buffer includes the necessary parameters
+required by the ISP.
+These parameters are written to the ISP hardware.
+
+Amlogic C3 ISP uAPI data types
+===============================
+
+.. kernel-doc:: drivers/media/platform/amlogic/c3-isp/include/uapi/c3-isp-config.h

-- 
2.46.1