查阅include/uapi/linux/rk-camera-module.h

 　　在设备树中添加该配置

rockchip,camera-hdr-mode = <5>;

static void init_engine(struct rkaiq_media_info *media_info)
{
    int index;
    rk_aiq_working_mode_t  work_mode = RK_AIQ_WORKING_MODE_ISP_HDR2;
   if (work_mode){
        rk_aiq_uapi2_sysctl_preInit_scene(media_info->sensor_entity_name, "hdr","day");
        ERR("rkaiq engine prepare mode0x%x   main_scene: hdr,   sub_scene:day  !\n",work_mode);
    }
    else{
          rk_aiq_uapi2_sysctl_preInit_scene(media_info->sensor_entity_name, "normal","day");
        ERR("rkaiq engine prepare mode0x%x   main_scene: normal, sub_scene:day !\n",work_mode);
    }

    media_info->aiq_ctx = rk_aiq_uapi2_sysctl_init(media_info->sensor_entity_name,
                                                  IQ_PATH, NULL, NULL);
    /* 3A server has listened stream events already */
    rk_aiq_uapi2_sysctl_setListenStrmStatus(media_info->aiq_ctx, false);
    if (has_mul_cam)
        rk_aiq_uapi2_sysctl_setMulCamConc(media_info->aiq_ctx, 1);

    if (rk_aiq_uapi2_sysctl_prepare(media_info->aiq_ctx,
            width, height, work_mode)) {
        ERR("rkaiq engine prepare failed !\n");
        exit(-1);
    }
}