diff --git a/umac/cmn_services/obj_mgr/inc/wlan_objmgr_pdev_obj.h b/umac/cmn_services/obj_mgr/inc/wlan_objmgr_pdev_obj.h
index 2be938846e09..82bc47d0647b 100644
--- a/umac/cmn_services/obj_mgr/inc/wlan_objmgr_pdev_obj.h
+++ b/umac/cmn_services/obj_mgr/inc/wlan_objmgr_pdev_obj.h
@@ -121,6 +121,8 @@
 #define WLAN_PDEV_OP_RESTART_INPROGRESS 0x00020000
    /* PDEV MBSSID VDEV restart trigger */
 #define WLAN_PDEV_OP_MBSSID_RESTART     0x00040000
+   /* RADAR DETECT Defer */
+#define WLAN_PDEV_OP_RADAR_DETECT_DEFER 0x00080000
 
 
 struct osif_pdev_priv;
diff --git a/umac/mlme/include/wlan_vdev_mlme.h b/umac/mlme/include/wlan_vdev_mlme.h
index dc8fc72fb217..9dbb955e01a0 100644
--- a/umac/mlme/include/wlan_vdev_mlme.h
+++ b/umac/mlme/include/wlan_vdev_mlme.h
@@ -452,6 +452,8 @@ enum vdev_start_resp_type {
  *                                      peer delete completion
  * @mlme_vdev_down_send:                callback to initiate actions of VDEV
  *                                      MLME down operation
+ * @mlme_vdev_notify_start_state_exit:  callback to notify on vdev start
+ *                                      start state exit
  */
 struct vdev_mlme_ops {
 	QDF_STATUS (*mlme_vdev_validate_basic_params)(
@@ -519,6 +521,8 @@ struct vdev_mlme_ops {
 	QDF_STATUS (*mlme_vdev_ext_start_rsp)(
 				struct vdev_mlme_obj *vdev_mlme,
 				struct vdev_start_response *rsp);
+	QDF_STATUS (*mlme_vdev_notify_start_state_exit)(
+				struct vdev_mlme_obj *vdev_mlme);
 };
 
 /**
@@ -986,4 +990,25 @@ static inline QDF_STATUS mlme_vdev_notify_down_complete(
 	return ret;
 }
 
+/**
+ * mlme_vdev_notify_start_state_exit - VDEV SM start state exit notification
+ * @vdev_mlme_obj:  VDEV MLME comp object
+ *
+ * API notifies on start state exit
+ *
+ * Return: SUCCESS on successful completion of notification
+ *         FAILURE, if it fails due to any
+ */
+static inline QDF_STATUS mlme_vdev_notify_start_state_exit(
+				struct vdev_mlme_obj *vdev_mlme)
+{
+	QDF_STATUS ret = QDF_STATUS_SUCCESS;
+
+	if ((vdev_mlme->ops) &&
+	    vdev_mlme->ops->mlme_vdev_notify_start_state_exit)
+		ret = vdev_mlme->ops->mlme_vdev_notify_start_state_exit(
+								vdev_mlme);
+
+	return ret;
+}
 #endif
diff --git a/umac/mlme/vdev_mgr/core/src/vdev_mlme_sm.c b/umac/mlme/vdev_mgr/core/src/vdev_mlme_sm.c
index e116ccd47aba..56cd96e83215 100644
--- a/umac/mlme/vdev_mgr/core/src/vdev_mlme_sm.c
+++ b/umac/mlme/vdev_mgr/core/src/vdev_mlme_sm.c
@@ -888,7 +888,9 @@ static void mlme_vdev_subst_start_conn_progress_entry(void *ctx)
  */
 static void mlme_vdev_subst_start_conn_progress_exit(void *ctx)
 {
-	/* NONE */
+	struct vdev_mlme_obj *vdev_mlme = (struct vdev_mlme_obj *)ctx;
+
+	mlme_vdev_notify_start_state_exit(vdev_mlme);
 }
 
 /**