    LOGD("using MMU handle: %x", isp_query_cap_cmd.device_iommu.non_secure);
    LOGD("using MMU handle: %x", isp_query_cap_cmd.cdm_iommu.non_secure);
    int device_iommu = isp_query_cap_cmd.device_iommu.non_secure;
    int cdm_iommu = isp_query_cap_cmd.cdm_iommu.non_secure;
    s->rear.device_iommu = s->front.device_iommu = s->wide.device_iommu = device_iommu;
    s->rear.cdm_iommu = s->front.cdm_iommu = s->wide.cdm_iommu = cdm_iommu;
  
    // subscribe
    LOG("-- Subscribing");
    static struct v4l2_event_subscription sub = {0};
    sub.type = 0x8000000;
 
</s> remove   s->rear.isp_fd = s->front.isp_fd = s->wide.isp_fd = s->isp_fd;
 </s> add   s->road_cam.isp_fd = s->driver_cam.isp_fd = s->wide_road_cam.isp_fd = s->isp_fd; </s> remove static void rear_start(CameraState *s) {
 </s> add static void road_camera_start(CameraState *s) { </s> remove   CameraState *c_handles[3] = {&s->wide, &s->rear, &s->front};
 </s> add   CameraState *c_handles[3] = {&s->wide_road_cam, &s->road_cam, &s->driver_cam}; </s> remove   int rear_op_id_last = 0;
  int front_op_id_last = 0;
 </s> add   int last_road_cam_op_id = 0;
  int last_driver_cam_op_id = 0; </s> remove   static const bool rhd_front = Params().read_db_bool("IsRHD");
 </s> add   static const bool is_rhd = Params().read_db_bool("IsRHD");
  s->road_cam.device_iommu = s->driver_cam.device_iommu = s->wide_road_cam.device_iommu = device_iommu;
  s->road_cam.cdm_iommu = s->driver_cam.cdm_iommu = s->wide_road_cam.cdm_iommu = cdm_iommu;
    LOGD("using MMU handle: %x", isp_query_cap_cmd.device_iommu.non_secure);
    LOGD("using MMU handle: %x", isp_query_cap_cmd.cdm_iommu.non_secure);
    int device_iommu = isp_query_cap_cmd.device_iommu.non_secure;
    int cdm_iommu = isp_query_cap_cmd.cdm_iommu.non_secure;
  s->road_cam.device_iommu = s->driver_cam.device_iommu = s->wide_road_cam.device_iommu = device_iommu;
  s->road_cam.cdm_iommu = s->driver_cam.cdm_iommu = s->wide_road_cam.cdm_iommu = cdm_iommu;
  s->road_cam.device_iommu = s->driver_cam.device_iommu = s->wide_road_cam.device_iommu = device_iommu;
  s->road_cam.cdm_iommu = s->driver_cam.cdm_iommu = s->wide_road_cam.cdm_iommu = cdm_iommu;
  
    // subscribe
    LOG("-- Subscribing");
    static struct v4l2_event_subscription sub = {0};
    sub.type = 0x8000000;
keep keep keep keep replace replace keep keep keep keep keep
 camerad: rename variables&functions to follow new convention (#20096)

* rename CameraState variables to follow new convention

* continue

* rename camera_process functions

* qcom:rename exposure related variables

* continue

* update commments

* bool real -> bool is_road_cam

* rename sm_front -> sm

* remove paramater tname from start_process_thread

* rename rhd_front to is_rhd

* remove unused varialble name from struct CameraInfo

* rename env_send_xxx

* rename cap_front to cap_driver,cap_rear to cap_road

* rename xxx_camera_process to process_xxx_camera

* update snapshot.py 
selfdrive/camerad/cameras/camera_qcom2.cc