1*e6a47023SSakari Ailus.. SPDX-License-Identifier: GPL-2.0 2*e6a47023SSakari Ailus 3*e6a47023SSakari Ailus.. _v4l2-meta-fmt-rk-isp1-params: 4*e6a47023SSakari Ailus 5*e6a47023SSakari Ailus.. _v4l2-meta-fmt-rk-isp1-stat-3a: 6*e6a47023SSakari Ailus 7*e6a47023SSakari Ailus***************************************************************************** 8*e6a47023SSakari AilusV4L2_META_FMT_RK_ISP1_PARAMS ('rk1p'), V4L2_META_FMT_RK_ISP1_STAT_3A ('rk1s') 9*e6a47023SSakari Ailus***************************************************************************** 10*e6a47023SSakari Ailus 11*e6a47023SSakari AilusConfiguration parameters 12*e6a47023SSakari Ailus======================== 13*e6a47023SSakari Ailus 14*e6a47023SSakari AilusThe configuration parameters are passed to the 15*e6a47023SSakari Ailus:ref:`rkisp1_params <rkisp1_params>` metadata output video node, using 16*e6a47023SSakari Ailusthe :c:type:`v4l2_meta_format` interface. The buffer contains 17*e6a47023SSakari Ailusa single instance of the C structure :c:type:`rkisp1_params_cfg` defined in 18*e6a47023SSakari Ailus``rkisp1-config.h``. So the structure can be obtained from the buffer by: 19*e6a47023SSakari Ailus 20*e6a47023SSakari Ailus.. code-block:: c 21*e6a47023SSakari Ailus 22*e6a47023SSakari Ailus struct rkisp1_params_cfg *params = (struct rkisp1_params_cfg*) buffer; 23*e6a47023SSakari Ailus 24*e6a47023SSakari Ailus.. rkisp1_stat_buffer 25*e6a47023SSakari Ailus 26*e6a47023SSakari Ailus3A and histogram statistics 27*e6a47023SSakari Ailus=========================== 28*e6a47023SSakari Ailus 29*e6a47023SSakari AilusThe ISP1 device collects different statistics over an input Bayer frame. 30*e6a47023SSakari AilusThose statistics are obtained from the :ref:`rkisp1_stats <rkisp1_stats>` 31*e6a47023SSakari Ailusmetadata capture video node, 32*e6a47023SSakari Ailususing the :c:type:`v4l2_meta_format` interface. The buffer contains a single 33*e6a47023SSakari Ailusinstance of the C structure :c:type:`rkisp1_stat_buffer` defined in 34*e6a47023SSakari Ailus``rkisp1-config.h``. So the structure can be obtained from the buffer by: 35*e6a47023SSakari Ailus 36*e6a47023SSakari Ailus.. code-block:: c 37*e6a47023SSakari Ailus 38*e6a47023SSakari Ailus struct rkisp1_stat_buffer *stats = (struct rkisp1_stat_buffer*) buffer; 39*e6a47023SSakari Ailus 40*e6a47023SSakari AilusThe statistics collected are Exposure, AWB (Auto-white balance), Histogram and 41*e6a47023SSakari AilusAF (Auto-focus). See :c:type:`rkisp1_stat_buffer` for details of the statistics. 42*e6a47023SSakari Ailus 43*e6a47023SSakari AilusThe 3A statistics and configuration parameters described here are usually 44*e6a47023SSakari Ailusconsumed and produced by dedicated user space libraries that comprise the 45*e6a47023SSakari Ailusimportant tuning tools using software control loop. 46*e6a47023SSakari Ailus 47*e6a47023SSakari Ailusrkisp1 uAPI data types 48*e6a47023SSakari Ailus====================== 49*e6a47023SSakari Ailus 50*e6a47023SSakari Ailus.. kernel-doc:: include/uapi/linux/rkisp1-config.h 51