diff --git a/inc/rk_mpi.h b/inc/rk_mpi.h
index 2cce8973..88863f22 100644
--- a/inc/rk_mpi.h
+++ b/inc/rk_mpi.h
@@ -240,6 +240,33 @@ MPP_RET mpp_create(MppCtx *ctx, MppApi **mpi);
  *         error code. For details, please refer mpp_err.h.
  */
 MPP_RET mpp_init(MppCtx ctx, MppCtxType type, MppCodingType coding);
+/**
+ * @ingroup rk_mpi
+ * @brief Call after mpp_init to start mpp working.
+ *        Control SET_CFG can be called both before and after mpp_start.
+ *        Before mpp_start is called both global param and dynamic param can be set.
+ *        After mpp_start is called only dynamic param can be set.
+ *        This funciton purpose is to stop recieving global param and do
+ *        preparation for processing data flow.
+ *        This function will call internal context start function.
+ * @param[in] ctx The context of mpp, created by mpp_create().
+ * @return 0 for success, others for failure. The return value is an
+ *         error code. For details, please refer mpp_err.h.
+ */
+MPP_RET mpp_start(MppCtx ctx);
+/**
+ * @ingroup rk_mpi
+ * @brief Call before mpp_destroy to stop mpp working.
+ *        Control SET_CFG can be called after starting.
+ *        Before mpp_stop is called only dynamic param can be set.
+ *        After mpp_stop is called both global param and dynamic param can be set.
+ *        This funciton purpose is to stop processing data and do preparation
+ *        to receive global param.
+ * @param[in] ctx The context of mpp, created by mpp_create().
+ * @return 0 for success, others for failure. The return value is an
+ *         error code. For details, please refer mpp_err.h.
+ */
+MPP_RET mpp_stop(MppCtx ctx);
 /**
  * @ingroup rk_mpi
  * @brief Destroy mpp context and free both context and mpi structure,