从这里走下去看 hardware/rockchip/camera/CameraHal/CameraHal_Module.cpp
camera_get_number_of_cameras();
LoadSensor();
OpenAndRegistALLSensor();
OpenAndRegistOneSensor();
pfIsiGetSensorI2cInfo(); // 根据sensename获取I2c信息
IMX258_IsiGetSensorI2cInfo(); // 例如sensename是IMX258，驱动中进行i2c地址赋值
RegisterSensorDevice(); // 根据caminfo注册sensor
