media: staging: rkisp1: add document for rkisp1 meta buffer format

This commit add document for rkisp1 meta buffer format
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/rkisp1/Documentation/media/uapi/v4l/pixfmt-meta-rkisp1-params.rst

+.. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+.. _v4l2-meta-fmt-rkisp1-params:
+
+============================
+V4L2_META_FMT_RK_ISP1_PARAMS
+============================
+
+Rockchip ISP1 Parameters Data
+
+Description
+===========
+
+This format describes input parameters for the Rockchip ISP1.
+
+It uses c-struct :c:type:`rkisp1_params_cfg`, which is defined in
+the ``linux/rkisp1-config.h`` header file.
+
+The parameters consist of multiple modules.
+The module won't be updated if the corresponding bit was not set in module_*_update.
+
+.. kernel-doc:: include/uapi/linux/rkisp1-config.h
+   :functions: rkisp1_params_cfg

drivers/staging/media/rkisp1/Documentation/media/uapi/v4l/pixfmt-meta-rkisp1-stat.rst

+.. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+.. _v4l2-meta-fmt-rkisp1-stat:
+
+=============================
+V4L2_META_FMT_RK_ISP1_STAT_3A
+=============================
+
+
+Rockchip ISP1 Statistics Data
+
+Description
+===========
+
+This format describes image color statistics information generated by the Rockchip
+ISP1.
+
+It uses c-struct :c:type:`rkisp1_stat_buffer`, which is defined in
+the ``linux/rkisp1-config.h`` header file.
+
+.. kernel-doc:: include/uapi/linux/rkisp1-config.h
+   :functions: rkisp1_stat_buffer