diff --git a/osal/inc/mpp_list.h b/osal/inc/mpp_list.h
index ba34349b..204ab92c 100644
--- a/osal/inc/mpp_list.h
+++ b/osal/inc/mpp_list.h
@@ -67,7 +67,9 @@ public:
 
     // for list wait
     MPP_RET wait_lt(RK_S64 timeout, RK_S32 val);
+    MPP_RET wait_le(RK_S64 timeout, RK_S32 val);
     MPP_RET wait_gt(RK_S64 timeout, RK_S32 val);
+    MPP_RET wait_ge(RK_S64 timeout, RK_S32 val);
 
 private:
     node_destructor         destroy;
diff --git a/osal/mpp_list.cpp b/osal/mpp_list.cpp
index a747c63c..7c9ec3d2 100644
--- a/osal/mpp_list.cpp
+++ b/osal/mpp_list.cpp
@@ -300,6 +300,22 @@ RK_S32 mpp_list::flush()
 }
 
 MPP_RET mpp_list::wait_lt(RK_S64 timeout, RK_S32 val)
+{
+    if (list_size() < val)
+        return MPP_OK;
+
+    if (!timeout)
+        return MPP_NOK;
+
+    if (timeout < 0)
+        wait();
+    else
+        wait(timeout);
+
+    return list_size() < val ? MPP_OK : MPP_NOK;
+}
+
+MPP_RET mpp_list::wait_le(RK_S64 timeout, RK_S32 val)
 {
     if (list_size() <= val)
         return MPP_OK;
@@ -316,6 +332,22 @@ MPP_RET mpp_list::wait_lt(RK_S64 timeout, RK_S32 val)
 }
 
 MPP_RET mpp_list::wait_gt(RK_S64 timeout, RK_S32 val)
+{
+    if (list_size() > val)
+        return MPP_OK;
+
+    if (!timeout)
+        return MPP_NOK;
+
+    if (timeout < 0)
+        wait();
+    else
+        wait(timeout);
+
+    return list_size() > val ? MPP_OK : MPP_NOK;
+}
+
+MPP_RET mpp_list::wait_ge(RK_S64 timeout, RK_S32 val)
 {
     if (list_size() >= val)
         return MPP_OK;