diff --git a/audio/7.1/IPrimaryDevice.hal b/audio/7.1/IPrimaryDevice.hal
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+++ b/audio/7.1/IPrimaryDevice.hal
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+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.audio@7.1;
+
+import android.hardware.audio.common@7.0;
+import @7.0::IPrimaryDevice;
+import IDevice;
+
+interface IPrimaryDevice extends @7.0::IPrimaryDevice {
+    /**
+     * Retrieve the generic @7.1::IDevice interface.
+     *
+     * Since @7.1::IPrimaryDevice extends @7.0::IPrimaryDevice, the interface
+     * reference can not be downcasted to @7.1::IDevice using standard methods.
+     * For this reason a dedicated interface method is provided.
+     *
+     * @return result the generic part of the interface.
+     */
+    getDevice() generates (IDevice result);
+};