v4l2_g_ctrl
ret = v4l2_g_ctrl(esd->ctrl_handler, &hb);
EXPORT_SYMBOL(v4l2_g_ctrl);
return v4l2_g_ctrl(vfh->ctrl_handler, p);
return v4l2_g_ctrl(vfd->ctrl_handler, p);
return v4l2_g_ctrl(vfh->ctrl_handler, arg);
if (v4l2_g_ctrl(input->sensor->ctrl_handler, &ctrl) == 0)
if (v4l2_g_ctrl
int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *ctrl);