diff --git a/services/audioflinger/PatchPanel.cpp b/services/audioflinger/PatchPanel.cpp
index 7d3900b..17591dd 100644
--- a/services/audioflinger/PatchPanel.cpp
+++ b/services/audioflinger/PatchPanel.cpp
@@ -447,6 +447,24 @@
     return status;
 }
 
+status_t PatchPanel::getAudioMixPort_l(const audio_port_v7 *devicePort,
+                                       audio_port_v7 *mixPort) {
+    if (devicePort->type != AUDIO_PORT_TYPE_DEVICE) {
+        ALOGE("%s the type of given device port is not DEVICE", __func__);
+        return INVALID_OPERATION;
+    }
+    if (mixPort->type != AUDIO_PORT_TYPE_MIX) {
+        ALOGE("%s the type of given mix port is not MIX", __func__);
+        return INVALID_OPERATION;
+    }
+    AudioHwDevice* hwDevice = findAudioHwDeviceByModule_l(devicePort->ext.device.hw_module);
+    if (hwDevice == nullptr) {
+        ALOGW("%s cannot find hw module %d", __func__, devicePort->ext.device.hw_module);
+        return BAD_VALUE;
+    }
+    return hwDevice->getAudioMixPort(devicePort, mixPort);
+}
+
 PatchPanel::Patch::~Patch()
 {
     ALOGE_IF(isSoftware(), "Software patch connections leaked %d %d",