diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index da0df5f..d49a002 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -574,6 +574,10 @@
                                              media::DeviceConnectedState state) = 0;
 
     virtual status_t invalidateTracks(const std::vector<audio_port_handle_t>& portIds) = 0;
+
+    // Get the attributes of the mix port when connecting to the given device port.
+    virtual status_t getAudioMixPort(const struct audio_port_v7 *devicePort,
+                                     struct audio_port_v7 *mixPort) = 0;
 };
 
     // These are the signatures of createAudioPolicyManager/destroyAudioPolicyManager