diff --git a/audio/aidl/Android.bp b/audio/aidl/Android.bp
index bb48ecd..515787e 100644
--- a/audio/aidl/Android.bp
+++ b/audio/aidl/Android.bp
@@ -114,6 +114,7 @@
         "android/hardware/audio/core/AudioRoute.aidl",
         "android/hardware/audio/core/IBluetooth.aidl",
         "android/hardware/audio/core/IBluetoothA2dp.aidl",
+        "android/hardware/audio/core/IBluetoothLe.aidl",
         "android/hardware/audio/core/IConfig.aidl",
         "android/hardware/audio/core/IModule.aidl",
         "android/hardware/audio/core/IStreamCallback.aidl",
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetoothLe.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetoothLe.aidl
new file mode 100644
index 0000000..f29e1fd
--- /dev/null
+++ b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetoothLe.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.audio.core;
+@VintfStability
+interface IBluetoothLe {
+  boolean isEnabled();
+  void setEnabled(boolean enabled);
+}
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl
index f18d6a5..e14e9c0 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl
@@ -38,6 +38,7 @@
   @nullable android.hardware.audio.core.ITelephony getTelephony();
   @nullable android.hardware.audio.core.IBluetooth getBluetooth();
   @nullable android.hardware.audio.core.IBluetoothA2dp getBluetoothA2dp();
+  @nullable android.hardware.audio.core.IBluetoothLe getBluetoothLe();
   android.media.audio.common.AudioPort connectExternalDevice(in android.media.audio.common.AudioPort templateIdAndAdditionalData);
   void disconnectExternalDevice(int portId);
   android.hardware.audio.core.AudioPatch[] getAudioPatches();
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IStreamCommon.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IStreamCommon.aidl
index f0bf100..65a2ee4 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IStreamCommon.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IStreamCommon.aidl
@@ -35,6 +35,7 @@
 @VintfStability
 interface IStreamCommon {
   void close();
+  void prepareToClose();
   void updateHwAvSyncId(int hwAvSyncId);
   android.hardware.audio.core.VendorParameter[] getVendorParameters(in @utf8InCpp String[] ids);
   void setVendorParameters(in android.hardware.audio.core.VendorParameter[] parameters, boolean async);
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AcousticEchoCanceler.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AcousticEchoCanceler.aidl
index 1ec7dad..16367c0 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AcousticEchoCanceler.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AcousticEchoCanceler.aidl
@@ -39,7 +39,7 @@
   boolean mobileMode;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.AcousticEchoCanceler.Tag commonTag;
   }
 }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV1.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV1.aidl
index 57d4418..e69e2bd 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV1.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV1.aidl
@@ -40,7 +40,7 @@
   boolean enableLimiter;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.AutomaticGainControlV1.Tag commonTag;
   }
 }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV2.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV2.aidl
index bdb481c..46ffcaf 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV2.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/AutomaticGainControlV2.aidl
@@ -40,7 +40,7 @@
   int saturationMarginMb;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.AutomaticGainControlV2.Tag commonTag;
   }
   @Backing(type="int") @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/BassBoost.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/BassBoost.aidl
index d09fe54..c248ce8 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/BassBoost.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/BassBoost.aidl
@@ -38,7 +38,7 @@
   int strengthPm;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.BassBoost.Tag commonTag;
   }
 }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Downmix.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Downmix.aidl
index 45a1f28..ce0a7df 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Downmix.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Downmix.aidl
@@ -38,7 +38,7 @@
   android.hardware.audio.effect.Downmix.Type type;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.Downmix.Tag commonTag;
   }
   @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/DynamicsProcessing.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/DynamicsProcessing.aidl
index 3e20e33..04f627d 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/DynamicsProcessing.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/DynamicsProcessing.aidl
@@ -34,7 +34,7 @@
 package android.hardware.audio.effect;
 @VintfStability
 union DynamicsProcessing {
-  android.hardware.audio.effect.VendorExtension vendorExtension;
+  android.hardware.audio.effect.VendorExtension vendor;
   android.hardware.audio.effect.DynamicsProcessing.EngineArchitecture engineArchitecture;
   android.hardware.audio.effect.DynamicsProcessing.ChannelConfig[] preEq;
   android.hardware.audio.effect.DynamicsProcessing.ChannelConfig[] postEq;
@@ -46,7 +46,7 @@
   android.hardware.audio.effect.DynamicsProcessing.InputGain[] inputGain;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.DynamicsProcessing.Tag commonTag;
   }
   enum ResolutionPreference {
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/EnvironmentalReverb.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/EnvironmentalReverb.aidl
index c12ebb8..00b7d1a 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/EnvironmentalReverb.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/EnvironmentalReverb.aidl
@@ -48,7 +48,7 @@
   boolean bypass;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.EnvironmentalReverb.Tag commonTag;
   }
 }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Equalizer.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Equalizer.aidl
index 3e3539f..80f7c7e 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Equalizer.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Equalizer.aidl
@@ -34,7 +34,7 @@
 package android.hardware.audio.effect;
 @VintfStability
 union Equalizer {
-  android.hardware.audio.effect.VendorExtension vendorExtension;
+  android.hardware.audio.effect.VendorExtension vendor;
   android.hardware.audio.effect.Equalizer.BandLevel[] bandLevels;
   int preset;
   int[] centerFreqMh;
@@ -42,7 +42,7 @@
   android.hardware.audio.effect.Equalizer.Preset[] presets;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.Equalizer.Tag commonTag;
   }
   @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/HapticGenerator.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/HapticGenerator.aidl
index a7dc265..8addab7 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/HapticGenerator.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/HapticGenerator.aidl
@@ -34,12 +34,12 @@
 package android.hardware.audio.effect;
 @VintfStability
 union HapticGenerator {
-  android.hardware.audio.effect.VendorExtension vendorExtension;
+  android.hardware.audio.effect.VendorExtension vendor;
   android.hardware.audio.effect.HapticGenerator.HapticScale[] hapticScales;
   android.hardware.audio.effect.HapticGenerator.VibratorInformation vibratorInfo;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.HapticGenerator.Tag commonTag;
   }
   @Backing(type="int") @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/LoudnessEnhancer.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/LoudnessEnhancer.aidl
index 774f45f..fc276d6 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/LoudnessEnhancer.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/LoudnessEnhancer.aidl
@@ -38,7 +38,7 @@
   int gainMb;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.LoudnessEnhancer.Tag commonTag;
   }
 }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/NoiseSuppression.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/NoiseSuppression.aidl
index f1a3449..7f30fe2 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/NoiseSuppression.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/NoiseSuppression.aidl
@@ -39,7 +39,7 @@
   android.hardware.audio.effect.NoiseSuppression.Type type;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.NoiseSuppression.Tag commonTag;
   }
   @Backing(type="int") @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl
index 14aa1e8..b50a2f1 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl
@@ -42,7 +42,7 @@
   android.hardware.audio.effect.Parameter.Specific specific;
   @VintfStability
   union Id {
-    int vendorEffectTag;
+    android.hardware.audio.effect.VendorExtension vendorEffectTag;
     android.hardware.audio.effect.AcousticEchoCanceler.Id acousticEchoCancelerTag;
     android.hardware.audio.effect.AutomaticGainControlV1.Id automaticGainControlV1Tag;
     android.hardware.audio.effect.AutomaticGainControlV2.Id automaticGainControlV2Tag;
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/PresetReverb.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/PresetReverb.aidl
index 148f79d..26d96b5 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/PresetReverb.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/PresetReverb.aidl
@@ -49,7 +49,7 @@
   }
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.PresetReverb.Tag commonTag;
   }
 }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Virtualizer.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Virtualizer.aidl
index e9611e4..6092b14 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Virtualizer.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Virtualizer.aidl
@@ -40,7 +40,7 @@
   android.media.audio.common.AudioDeviceDescription device;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.Virtualizer.Tag commonTag;
     android.hardware.audio.effect.Virtualizer.SpeakerAnglesPayload speakerAnglesPayload;
   }
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Visualizer.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Visualizer.aidl
index d1b1b3e..7d319da 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Visualizer.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Visualizer.aidl
@@ -44,7 +44,7 @@
   android.hardware.audio.effect.Visualizer.MeasurementMode measurementMode;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.Visualizer.Tag commonTag;
   }
   @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Volume.aidl b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Volume.aidl
index c2b2df7..8227118 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Volume.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Volume.aidl
@@ -39,7 +39,7 @@
   boolean mute;
   @VintfStability
   union Id {
-    int vendorExtensionTag;
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
     android.hardware.audio.effect.Volume.Tag commonTag;
   }
 }
diff --git a/audio/aidl/android/hardware/audio/core/IBluetooth.aidl b/audio/aidl/android/hardware/audio/core/IBluetooth.aidl
index 21ac8e2..7fa2e24 100644
--- a/audio/aidl/android/hardware/audio/core/IBluetooth.aidl
+++ b/audio/aidl/android/hardware/audio/core/IBluetooth.aidl
@@ -25,6 +25,9 @@
  * and the SCO Link. This interface is optional to implement and provide by the
  * vendor. It needs to be provided only if the device actually supports BT SCO
  * or HFP.
+ *
+ * Each of IBluetooth* interfaces is independent of each other. The HAL module
+ * can provide any combination of them.
  */
 @VintfStability
 interface IBluetooth {
diff --git a/audio/aidl/android/hardware/audio/core/IBluetoothA2dp.aidl b/audio/aidl/android/hardware/audio/core/IBluetoothA2dp.aidl
index dc4b8d0..c4dd738 100644
--- a/audio/aidl/android/hardware/audio/core/IBluetoothA2dp.aidl
+++ b/audio/aidl/android/hardware/audio/core/IBluetoothA2dp.aidl
@@ -24,8 +24,8 @@
  * the vendor. It needs to be provided only if the device actually supports BT
  * A2DP.
  *
- * This interface is separate from IBluetooth interface which manages SCO & HFP.
- * The HAL module can handle both SCO and A2DP profiles or only one of them.
+ * Each of IBluetooth* interfaces is independent of each other. The HAL module
+ * can provide any combination of them.
  */
 @VintfStability
 interface IBluetoothA2dp {
diff --git a/audio/aidl/android/hardware/audio/core/IBluetoothLe.aidl b/audio/aidl/android/hardware/audio/core/IBluetoothLe.aidl
new file mode 100644
index 0000000..272f862
--- /dev/null
+++ b/audio/aidl/android/hardware/audio/core/IBluetoothLe.aidl
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2023 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.core;
+
+/**
+ * An instance of IBluetoothLe manages settings for the LE (Low Energy)
+ * profiles. This interface is optional to implement by the vendor. It needs to
+ * be provided only if the device actually supports BT LE.
+ *
+ * Each of IBluetooth* interfaces is independent of each other. The HAL module
+ * can provide any combination of them.
+ */
+@VintfStability
+interface IBluetoothLe {
+    /**
+     * Whether BT LE is enabled.
+     *
+     * Returns the current state of LE support. The client might need to
+     * disable (suspend) LE when another profile (for example, SCO) is
+     * activated.
+     *
+     * @return Whether BT LE is enabled.
+     */
+    boolean isEnabled();
+
+    /**
+     * Enable or disable LE.
+     *
+     * Sets the current state of LE support. The client might need to
+     * disable (suspend) LE when another Bluetooth profile (for example, SCO) is
+     * activated.
+     *
+     * @param enabled Whether BT LE must be enabled or suspended.
+     * @throws EX_ILLEGAL_STATE If there was an error performing the operation.
+     */
+    void setEnabled(boolean enabled);
+}
diff --git a/audio/aidl/android/hardware/audio/core/IModule.aidl b/audio/aidl/android/hardware/audio/core/IModule.aidl
index 080d826..7830501 100644
--- a/audio/aidl/android/hardware/audio/core/IModule.aidl
+++ b/audio/aidl/android/hardware/audio/core/IModule.aidl
@@ -22,6 +22,7 @@
 import android.hardware.audio.core.AudioRoute;
 import android.hardware.audio.core.IBluetooth;
 import android.hardware.audio.core.IBluetoothA2dp;
+import android.hardware.audio.core.IBluetoothLe;
 import android.hardware.audio.core.IStreamCallback;
 import android.hardware.audio.core.IStreamIn;
 import android.hardware.audio.core.IStreamOut;
@@ -118,6 +119,20 @@
     @nullable IBluetoothA2dp getBluetoothA2dp();
 
     /**
+     * Retrieve the interface to control Bluetooth LE.
+     *
+     * If the HAL module supports LE Profile functionality for Bluetooth, it
+     * must return an instance of the IBluetoothLe interface. The same
+     * instance must be returned during the lifetime of the HAL module. If the
+     * HAL module does not support BT LE, a null must be returned, without
+     * throwing any errors.
+     *
+     * @return An instance of the IBluetoothLe interface implementation.
+     * @throws EX_ILLEGAL_STATE If there was an error creating an instance.
+     */
+    @nullable IBluetoothLe getBluetoothLe();
+
+    /**
      * Set a device port of an external device into connected state.
      *
      * This method is used to inform the HAL module that an external device has
@@ -842,7 +857,7 @@
     AudioMMapPolicyInfo[] getMmapPolicyInfos(AudioMMapPolicyType mmapPolicyType);
 
     /**
-     * Indicates if this module supports variable latency control for instance
+     * Indicates if this module supports variable latency control, for instance,
      * over Bluetooth A2DP or LE Audio links.
      *
      * If supported, all instances of IStreamOut interface returned by this module must
diff --git a/audio/aidl/android/hardware/audio/core/IStreamCommon.aidl b/audio/aidl/android/hardware/audio/core/IStreamCommon.aidl
index 533ef67..543d9e2 100644
--- a/audio/aidl/android/hardware/audio/core/IStreamCommon.aidl
+++ b/audio/aidl/android/hardware/audio/core/IStreamCommon.aidl
@@ -44,6 +44,33 @@
     void close();
 
     /**
+     * Notify the stream that it is about to be closed.
+     *
+     * This is a notification sent by the client to indicate that it intends to
+     * close the stream "soon" (the actual time period is unspecified). The
+     * purpose of this notification is to allow the stream implementation to
+     * unblock the I/O thread. This is useful for HAL modules that act as
+     * proxies to other subsystems, examples are "bluetooth" and "r_submix"
+     * modules. In such modules the I/O thread might get blocked on a read or
+     * write operation to the external subsystem. Thus, calling 'close' directly
+     * will stall, as it will try to send the 'Command.halReservedExit' on the
+     * I/O thread which is blocked and is not reading commands from the FMQ. The
+     * HAL implementation must initiate unblocking as a result of receiving the
+     * 'prepareToClose' notification.
+     *
+     * This operation must be handled by the HAL module in an "asynchronous"
+     * manner, returning control back as quick as possible.
+     *
+     * Since this operation does not have any effects observable from the client
+     * side, the HAL module must be able to handle multiple calls of this method
+     * without throwing any errors. The only case when this method is allowed
+     * to throw is when the stream has been closed.
+     *
+     * @throws EX_ILLEGAL_STATE If the stream is closed.
+     */
+    void prepareToClose();
+
+    /**
      * Update the HW AV Sync identifier for the stream.
      *
      * The argument to this method must be one of the identifiers previously
diff --git a/audio/aidl/android/hardware/audio/effect/AcousticEchoCanceler.aidl b/audio/aidl/android/hardware/audio/effect/AcousticEchoCanceler.aidl
index 49377d6..bf1f8a2 100644
--- a/audio/aidl/android/hardware/audio/effect/AcousticEchoCanceler.aidl
+++ b/audio/aidl/android/hardware/audio/effect/AcousticEchoCanceler.aidl
@@ -33,7 +33,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         AcousticEchoCanceler.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV1.aidl b/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV1.aidl
index 9b2feff..e7bf99d 100644
--- a/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV1.aidl
+++ b/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV1.aidl
@@ -35,7 +35,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         AutomaticGainControlV1.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV2.aidl b/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV2.aidl
index 836d6b8..8f2afdc 100644
--- a/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV2.aidl
+++ b/audio/aidl/android/hardware/audio/effect/AutomaticGainControlV2.aidl
@@ -36,7 +36,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         AutomaticGainControlV2.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/BassBoost.aidl b/audio/aidl/android/hardware/audio/effect/BassBoost.aidl
index d734825..479db96 100644
--- a/audio/aidl/android/hardware/audio/effect/BassBoost.aidl
+++ b/audio/aidl/android/hardware/audio/effect/BassBoost.aidl
@@ -32,7 +32,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         BassBoost.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/Downmix.aidl b/audio/aidl/android/hardware/audio/effect/Downmix.aidl
index f90e339..90fd4c7 100644
--- a/audio/aidl/android/hardware/audio/effect/Downmix.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Downmix.aidl
@@ -31,7 +31,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         Downmix.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/DynamicsProcessing.aidl b/audio/aidl/android/hardware/audio/effect/DynamicsProcessing.aidl
index 486d4f4..5aea211 100644
--- a/audio/aidl/android/hardware/audio/effect/DynamicsProcessing.aidl
+++ b/audio/aidl/android/hardware/audio/effect/DynamicsProcessing.aidl
@@ -32,14 +32,14 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         DynamicsProcessing.Tag commonTag;
     }
 
     /**
      * Vendor DynamicsProcessing implementation definition for additional parameters.
      */
-    VendorExtension vendorExtension;
+    VendorExtension vendor;
 
     /**
      * Resolution preference definition.
diff --git a/audio/aidl/android/hardware/audio/effect/EnvironmentalReverb.aidl b/audio/aidl/android/hardware/audio/effect/EnvironmentalReverb.aidl
index 95d1ff6..1d58e50 100644
--- a/audio/aidl/android/hardware/audio/effect/EnvironmentalReverb.aidl
+++ b/audio/aidl/android/hardware/audio/effect/EnvironmentalReverb.aidl
@@ -33,7 +33,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         EnvironmentalReverb.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/Equalizer.aidl b/audio/aidl/android/hardware/audio/effect/Equalizer.aidl
index 2bce151..e727f70 100644
--- a/audio/aidl/android/hardware/audio/effect/Equalizer.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Equalizer.aidl
@@ -31,14 +31,14 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         Equalizer.Tag commonTag;
     }
 
     /**
      * Vendor Equalizer implementation definition for additional parameters.
      */
-    VendorExtension vendorExtension;
+    VendorExtension vendor;
 
     /**
      * Level setting for each band in millibels.
diff --git a/audio/aidl/android/hardware/audio/effect/HapticGenerator.aidl b/audio/aidl/android/hardware/audio/effect/HapticGenerator.aidl
index a8e4564..3cc5acb 100644
--- a/audio/aidl/android/hardware/audio/effect/HapticGenerator.aidl
+++ b/audio/aidl/android/hardware/audio/effect/HapticGenerator.aidl
@@ -33,14 +33,14 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         HapticGenerator.Tag commonTag;
     }
 
     /**
      * Vendor HapticGenerator implementation definition for additional parameters.
      */
-    VendorExtension vendorExtension;
+    VendorExtension vendor;
 
     @VintfStability
     @Backing(type="int")
diff --git a/audio/aidl/android/hardware/audio/effect/LoudnessEnhancer.aidl b/audio/aidl/android/hardware/audio/effect/LoudnessEnhancer.aidl
index a7cbe8d..23e1e5a 100644
--- a/audio/aidl/android/hardware/audio/effect/LoudnessEnhancer.aidl
+++ b/audio/aidl/android/hardware/audio/effect/LoudnessEnhancer.aidl
@@ -32,7 +32,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         LoudnessEnhancer.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/NoiseSuppression.aidl b/audio/aidl/android/hardware/audio/effect/NoiseSuppression.aidl
index 6c2fb5f..c6bcc43 100644
--- a/audio/aidl/android/hardware/audio/effect/NoiseSuppression.aidl
+++ b/audio/aidl/android/hardware/audio/effect/NoiseSuppression.aidl
@@ -35,7 +35,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         NoiseSuppression.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/Parameter.aidl b/audio/aidl/android/hardware/audio/effect/Parameter.aidl
index 9f8874b..229c621 100644
--- a/audio/aidl/android/hardware/audio/effect/Parameter.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Parameter.aidl
@@ -66,10 +66,10 @@
     @VintfStability
     union Id {
         /**
-         * Parameter tag defined for vendor effects. Use int here so there is flexibility for vendor
-         * to define different tag.
+         * Parameter tag defined for vendor effects. Use VendorExtension here so it's possible to
+         * pass customized information.
          */
-        int vendorEffectTag;
+        VendorExtension vendorEffectTag;
         /**
          * Parameter tag defined for nested parameters. Can be used to get any parameter defined in
          * nested Union structure.
diff --git a/audio/aidl/android/hardware/audio/effect/PresetReverb.aidl b/audio/aidl/android/hardware/audio/effect/PresetReverb.aidl
index 87c78b0..a36da2c 100644
--- a/audio/aidl/android/hardware/audio/effect/PresetReverb.aidl
+++ b/audio/aidl/android/hardware/audio/effect/PresetReverb.aidl
@@ -68,7 +68,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         PresetReverb.Tag commonTag;
     }
 
diff --git a/audio/aidl/android/hardware/audio/effect/Virtualizer.aidl b/audio/aidl/android/hardware/audio/effect/Virtualizer.aidl
index 37ea2a4..1dbb509 100644
--- a/audio/aidl/android/hardware/audio/effect/Virtualizer.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Virtualizer.aidl
@@ -34,7 +34,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         Virtualizer.Tag commonTag;
         SpeakerAnglesPayload speakerAnglesPayload;
     }
diff --git a/audio/aidl/android/hardware/audio/effect/Visualizer.aidl b/audio/aidl/android/hardware/audio/effect/Visualizer.aidl
index 8f2faaa..0b37546 100644
--- a/audio/aidl/android/hardware/audio/effect/Visualizer.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Visualizer.aidl
@@ -33,7 +33,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         Visualizer.Tag commonTag;
     }
     Id id;
diff --git a/audio/aidl/android/hardware/audio/effect/Volume.aidl b/audio/aidl/android/hardware/audio/effect/Volume.aidl
index 4a76703..15cfdd2 100644
--- a/audio/aidl/android/hardware/audio/effect/Volume.aidl
+++ b/audio/aidl/android/hardware/audio/effect/Volume.aidl
@@ -31,7 +31,7 @@
      */
     @VintfStability
     union Id {
-        int vendorExtensionTag;
+        VendorExtension vendorExtensionTag;
         Volume.Tag commonTag;
     }
 
diff --git a/audio/aidl/default/Android.bp b/audio/aidl/default/Android.bp
index ea00dcb..8bacbb3 100644
--- a/audio/aidl/default/Android.bp
+++ b/audio/aidl/default/Android.bp
@@ -13,6 +13,7 @@
     shared_libs: [
         "libalsautilsv2",
         "libaudioaidlcommon",
+        "libaudioutils",
         "libbase",
         "libbinder_ndk",
         "libcutils",
diff --git a/audio/aidl/default/Bluetooth.cpp b/audio/aidl/default/Bluetooth.cpp
index bd9a864..8115e7b 100644
--- a/audio/aidl/default/Bluetooth.cpp
+++ b/audio/aidl/default/Bluetooth.cpp
@@ -105,4 +105,16 @@
     return ndk::ScopedAStatus::ok();
 }
 
+ndk::ScopedAStatus BluetoothLe::isEnabled(bool* _aidl_return) {
+    *_aidl_return = mEnabled;
+    LOG(DEBUG) << __func__ << ": returning " << *_aidl_return;
+    return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus BluetoothLe::setEnabled(bool in_enabled) {
+    mEnabled = in_enabled;
+    LOG(DEBUG) << __func__ << ": " << mEnabled;
+    return ndk::ScopedAStatus::ok();
+}
+
 }  // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/Module.cpp b/audio/aidl/default/Module.cpp
index c4f3844..c95c199 100644
--- a/audio/aidl/default/Module.cpp
+++ b/audio/aidl/default/Module.cpp
@@ -396,6 +396,15 @@
     return ndk::ScopedAStatus::ok();
 }
 
+ndk::ScopedAStatus Module::getBluetoothLe(std::shared_ptr<IBluetoothLe>* _aidl_return) {
+    if (!mBluetoothLe) {
+        mBluetoothLe = ndk::SharedRefBase::make<BluetoothLe>();
+    }
+    *_aidl_return = mBluetoothLe.getPtr();
+    LOG(DEBUG) << __func__ << ": returning instance of IBluetoothLe: " << _aidl_return->get();
+    return ndk::ScopedAStatus::ok();
+}
+
 ndk::ScopedAStatus Module::connectExternalDevice(const AudioPort& in_templateIdAndAdditionalData,
                                                  AudioPort* _aidl_return) {
     const int32_t templateId = in_templateIdAndAdditionalData.id;
diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index 193c793..871480b 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -660,6 +660,16 @@
 }
 
 template <class Metadata>
+ndk::ScopedAStatus StreamCommonImpl<Metadata>::prepareToClose() {
+    LOG(DEBUG) << __func__;
+    if (!isClosed()) {
+        return ndk::ScopedAStatus::ok();
+    }
+    LOG(ERROR) << __func__ << ": stream was closed";
+    return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+}
+
+template <class Metadata>
 void StreamCommonImpl<Metadata>::stopWorker() {
     if (auto commandMQ = mContext.getCommandMQ(); commandMQ != nullptr) {
         LOG(DEBUG) << __func__ << ": asking the worker to exit...";
diff --git a/audio/aidl/default/StreamStub.cpp b/audio/aidl/default/StreamStub.cpp
index 0ed9357..2467320 100644
--- a/audio/aidl/default/StreamStub.cpp
+++ b/audio/aidl/default/StreamStub.cpp
@@ -14,8 +14,11 @@
  * limitations under the License.
  */
 
+#include <cmath>
+
 #define LOG_TAG "AHAL_Stream"
 #include <android-base/logging.h>
+#include <audio_utils/clock.h>
 
 #include "core-impl/Module.h"
 #include "core-impl/StreamStub.h"
@@ -29,31 +32,42 @@
 namespace aidl::android::hardware::audio::core {
 
 DriverStub::DriverStub(const StreamContext& context, bool isInput)
-    : mFrameSizeBytes(context.getFrameSize()), mIsInput(isInput) {}
+    : mFrameSizeBytes(context.getFrameSize()),
+      mSampleRate(context.getSampleRate()),
+      mIsAsynchronous(!!context.getAsyncCallback()),
+      mIsInput(isInput) {}
 
 ::android::status_t DriverStub::init() {
-    usleep(1000);
+    usleep(500);
     return ::android::OK;
 }
 
 ::android::status_t DriverStub::drain(StreamDescriptor::DrainMode) {
-    usleep(1000);
+    usleep(500);
     return ::android::OK;
 }
 
 ::android::status_t DriverStub::flush() {
-    usleep(1000);
+    usleep(500);
     return ::android::OK;
 }
 
 ::android::status_t DriverStub::pause() {
-    usleep(1000);
+    usleep(500);
     return ::android::OK;
 }
 
 ::android::status_t DriverStub::transfer(void* buffer, size_t frameCount, size_t* actualFrameCount,
                                          int32_t* latencyMs) {
-    usleep(3000);
+    static constexpr float kMicrosPerSecond = MICROS_PER_SECOND;
+    static constexpr float kScaleFactor = .8f;
+    if (mIsAsynchronous) {
+        usleep(500);
+    } else {
+        const size_t delayUs = static_cast<size_t>(
+                std::roundf(kScaleFactor * frameCount * kMicrosPerSecond / mSampleRate));
+        usleep(delayUs);
+    }
     if (mIsInput) {
         uint8_t* byteBuffer = static_cast<uint8_t*>(buffer);
         for (size_t i = 0; i < frameCount * mFrameSizeBytes; ++i) {
@@ -66,12 +80,13 @@
 }
 
 ::android::status_t DriverStub::standby() {
-    usleep(1000);
+    usleep(500);
     return ::android::OK;
 }
 
 ::android::status_t DriverStub::setConnectedDevices(
         const std::vector<AudioDevice>& connectedDevices __unused) {
+    usleep(500);
     return ::android::OK;
 }
 
diff --git a/audio/aidl/default/dynamicProcessing/DynamicsProcessingSw.cpp b/audio/aidl/default/dynamicProcessing/DynamicsProcessingSw.cpp
index da6d0c6..5e5c974 100644
--- a/audio/aidl/default/dynamicProcessing/DynamicsProcessingSw.cpp
+++ b/audio/aidl/default/dynamicProcessing/DynamicsProcessingSw.cpp
@@ -170,7 +170,7 @@
                       EX_ILLEGAL_ARGUMENT, "inputGainCfgFailed");
             return ndk::ScopedAStatus::ok();
         }
-        case DynamicsProcessing::vendorExtension: {
+        case DynamicsProcessing::vendor: {
             LOG(ERROR) << __func__ << " unsupported tag: " << toString(tag);
             return ndk::ScopedAStatus::fromExceptionCodeWithMessage(
                     EX_ILLEGAL_ARGUMENT, "DynamicsProcessingTagNotSupported");
@@ -237,7 +237,7 @@
             dpParam.set<DynamicsProcessing::inputGain>(mContext->getInputGainCfgs());
             break;
         }
-        case DynamicsProcessing::vendorExtension: {
+        case DynamicsProcessing::vendor: {
             LOG(ERROR) << __func__ << " unsupported tag: " << toString(tag);
             return ndk::ScopedAStatus::fromExceptionCodeWithMessage(
                     EX_ILLEGAL_ARGUMENT, "DynamicsProcessingTagNotSupported");
diff --git a/audio/aidl/default/extension/ExtensionEffect.cpp b/audio/aidl/default/extension/ExtensionEffect.cpp
index d2e3ccd..c4e4999 100644
--- a/audio/aidl/default/extension/ExtensionEffect.cpp
+++ b/audio/aidl/default/extension/ExtensionEffect.cpp
@@ -88,7 +88,7 @@
     std::optional<DefaultExtension> defaultExt;
     RETURN_IF(STATUS_OK != vendorEffect.extension.getParcelable(&defaultExt), EX_ILLEGAL_ARGUMENT,
               "getParcelableFailed");
-    RETURN_IF(!defaultExt.has_value(), EX_ILLEGAL_ARGUMENT, "parcelableNulld");
+    RETURN_IF(!defaultExt.has_value(), EX_ILLEGAL_ARGUMENT, "parcelableNull");
     RETURN_IF(mContext->setParams(defaultExt->bytes) != RetCode::SUCCESS, EX_ILLEGAL_ARGUMENT,
               "paramNotSupported");
 
@@ -99,10 +99,15 @@
                                                          Parameter::Specific* specific) {
     auto tag = id.getTag();
     RETURN_IF(Parameter::Id::vendorEffectTag != tag, EX_ILLEGAL_ARGUMENT, "wrongIdTag");
-    auto specificId = id.get<Parameter::Id::vendorEffectTag>();
+    auto extensionId = id.get<Parameter::Id::vendorEffectTag>();
+    std::optional<DefaultExtension> defaultIdExt;
+    RETURN_IF(STATUS_OK != extensionId.extension.getParcelable(&defaultIdExt), EX_ILLEGAL_ARGUMENT,
+              "getIdParcelableFailed");
+    RETURN_IF(!defaultIdExt.has_value(), EX_ILLEGAL_ARGUMENT, "parcelableIdNull");
+
     VendorExtension extension;
     DefaultExtension defaultExt;
-    defaultExt.bytes = mContext->getParams(specificId);
+    defaultExt.bytes = mContext->getParams(defaultIdExt->bytes);
     RETURN_IF(STATUS_OK != extension.extension.setParcelable(defaultExt), EX_ILLEGAL_ARGUMENT,
               "setParcelableFailed");
     specific->set<Parameter::Specific::vendorEffect>(extension);
diff --git a/audio/aidl/default/extension/ExtensionEffect.h b/audio/aidl/default/extension/ExtensionEffect.h
index 399fa83..f432d40 100644
--- a/audio/aidl/default/extension/ExtensionEffect.h
+++ b/audio/aidl/default/extension/ExtensionEffect.h
@@ -37,7 +37,7 @@
         mParams = params;
         return RetCode::SUCCESS;
     }
-    std::vector<uint8_t> getParams(int tag __unused) const { return mParams; }
+    std::vector<uint8_t> getParams(std::vector<uint8_t> id __unused) const { return mParams; }
 
   private:
     std::vector<uint8_t> mParams;
diff --git a/audio/aidl/default/include/core-impl/Bluetooth.h b/audio/aidl/default/include/core-impl/Bluetooth.h
index e2f48ba..1cd0355 100644
--- a/audio/aidl/default/include/core-impl/Bluetooth.h
+++ b/audio/aidl/default/include/core-impl/Bluetooth.h
@@ -18,6 +18,7 @@
 
 #include <aidl/android/hardware/audio/core/BnBluetooth.h>
 #include <aidl/android/hardware/audio/core/BnBluetoothA2dp.h>
+#include <aidl/android/hardware/audio/core/BnBluetoothLe.h>
 
 namespace aidl::android::hardware::audio::core {
 
@@ -48,4 +49,15 @@
     bool mEnabled = false;
 };
 
+class BluetoothLe : public BnBluetoothLe {
+  public:
+    BluetoothLe() = default;
+
+  private:
+    ndk::ScopedAStatus isEnabled(bool* _aidl_return) override;
+    ndk::ScopedAStatus setEnabled(bool in_enabled) override;
+
+    bool mEnabled = false;
+};
+
 }  // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/include/core-impl/Module.h b/audio/aidl/default/include/core-impl/Module.h
index c35025f..2cbda7d 100644
--- a/audio/aidl/default/include/core-impl/Module.h
+++ b/audio/aidl/default/include/core-impl/Module.h
@@ -72,6 +72,7 @@
     ndk::ScopedAStatus getTelephony(std::shared_ptr<ITelephony>* _aidl_return) override;
     ndk::ScopedAStatus getBluetooth(std::shared_ptr<IBluetooth>* _aidl_return) override;
     ndk::ScopedAStatus getBluetoothA2dp(std::shared_ptr<IBluetoothA2dp>* _aidl_return) override;
+    ndk::ScopedAStatus getBluetoothLe(std::shared_ptr<IBluetoothLe>* _aidl_return) override;
     ndk::ScopedAStatus connectExternalDevice(
             const ::aidl::android::media::audio::common::AudioPort& in_templateIdAndAdditionalData,
             ::aidl::android::media::audio::common::AudioPort* _aidl_return) override;
@@ -164,7 +165,7 @@
     bool isMmapSupported();
 
     // This value is used for all AudioPatches.
-    static constexpr int32_t kMinimumStreamBufferSizeFrames = 16;
+    static constexpr int32_t kMinimumStreamBufferSizeFrames = 256;
     // The maximum stream buffer size is 1 GiB = 2 ** 30 bytes;
     static constexpr int32_t kMaximumStreamBufferSizeBytes = 1 << 30;
 
@@ -175,6 +176,7 @@
     ChildInterface<ITelephony> mTelephony;
     ChildInterface<IBluetooth> mBluetooth;
     ChildInterface<IBluetoothA2dp> mBluetoothA2dp;
+    ChildInterface<IBluetoothLe> mBluetoothLe;
     // ids of ports created at runtime via 'connectExternalDevice'.
     std::set<int32_t> mConnectedDevicePorts;
     Streams mStreams;
diff --git a/audio/aidl/default/include/core-impl/Stream.h b/audio/aidl/default/include/core-impl/Stream.h
index e9b1fbb..65680df 100644
--- a/audio/aidl/default/include/core-impl/Stream.h
+++ b/audio/aidl/default/include/core-impl/Stream.h
@@ -294,6 +294,7 @@
 struct StreamCommonInterface {
     virtual ~StreamCommonInterface() = default;
     virtual ndk::ScopedAStatus close() = 0;
+    virtual ndk::ScopedAStatus prepareToClose() = 0;
     virtual ndk::ScopedAStatus updateHwAvSyncId(int32_t in_hwAvSyncId) = 0;
     virtual ndk::ScopedAStatus getVendorParameters(const std::vector<std::string>& in_ids,
                                                    std::vector<VendorParameter>* _aidl_return) = 0;
@@ -318,6 +319,11 @@
         return delegate != nullptr ? delegate->close()
                                    : ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
     }
+    ndk::ScopedAStatus prepareToClose() override {
+        auto delegate = mDelegate.lock();
+        return delegate != nullptr ? delegate->prepareToClose()
+                                   : ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     ndk::ScopedAStatus updateHwAvSyncId(int32_t in_hwAvSyncId) override {
         auto delegate = mDelegate.lock();
         return delegate != nullptr ? delegate->updateHwAvSyncId(in_hwAvSyncId)
@@ -359,6 +365,7 @@
 class StreamCommonImpl : public StreamCommonInterface {
   public:
     ndk::ScopedAStatus close() override;
+    ndk::ScopedAStatus prepareToClose() override;
     ndk::ScopedAStatus updateHwAvSyncId(int32_t in_hwAvSyncId) override;
     ndk::ScopedAStatus getVendorParameters(const std::vector<std::string>& in_ids,
                                            std::vector<VendorParameter>* _aidl_return) override;
diff --git a/audio/aidl/default/include/core-impl/StreamStub.h b/audio/aidl/default/include/core-impl/StreamStub.h
index 69fd7b3..df0182c 100644
--- a/audio/aidl/default/include/core-impl/StreamStub.h
+++ b/audio/aidl/default/include/core-impl/StreamStub.h
@@ -36,6 +36,8 @@
 
   private:
     const size_t mFrameSizeBytes;
+    const int mSampleRate;
+    const bool mIsAsynchronous;
     const bool mIsInput;
 };
 
diff --git a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
index 1e0c900..650a543 100644
--- a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
@@ -62,6 +62,7 @@
 using aidl::android::hardware::audio::core::AudioRoute;
 using aidl::android::hardware::audio::core::IBluetooth;
 using aidl::android::hardware::audio::core::IBluetoothA2dp;
+using aidl::android::hardware::audio::core::IBluetoothLe;
 using aidl::android::hardware::audio::core::IModule;
 using aidl::android::hardware::audio::core::IStreamCommon;
 using aidl::android::hardware::audio::core::IStreamIn;
@@ -1070,6 +1071,8 @@
         std::shared_ptr<IStreamCommon> common;
         ndk::ScopedAStatus status = stream->getStreamCommon(&common);
         if (!status.isOk()) return status;
+        status = common->prepareToClose();
+        if (!status.isOk()) return status;
         return common->close();
     }
 
@@ -2109,6 +2112,42 @@
     }
 }
 
+class AudioCoreBluetoothLe : public AudioCoreModuleBase,
+                             public testing::TestWithParam<std::string> {
+  public:
+    void SetUp() override {
+        ASSERT_NO_FATAL_FAILURE(SetUpImpl(GetParam()));
+        ASSERT_IS_OK(module->getBluetoothLe(&bluetooth));
+    }
+
+    void TearDown() override { ASSERT_NO_FATAL_FAILURE(TearDownImpl()); }
+
+    std::shared_ptr<IBluetoothLe> bluetooth;
+};
+
+TEST_P(AudioCoreBluetoothLe, SameInstance) {
+    if (bluetooth == nullptr) {
+        GTEST_SKIP() << "BluetoothLe is not supported";
+    }
+    std::shared_ptr<IBluetoothLe> bluetooth2;
+    EXPECT_IS_OK(module->getBluetoothLe(&bluetooth2));
+    ASSERT_NE(nullptr, bluetooth2.get());
+    EXPECT_EQ(bluetooth->asBinder(), bluetooth2->asBinder())
+            << "getBluetoothLe must return the same interface instance across invocations";
+}
+
+TEST_P(AudioCoreBluetoothLe, Enabled) {
+    if (bluetooth == nullptr) {
+        GTEST_SKIP() << "BluetoothLe is not supported";
+    }
+    // Since enabling LE may require having an actual device connection,
+    // limit testing to setting back the current value.
+    bool enabled;
+    ASSERT_IS_OK(bluetooth->isEnabled(&enabled));
+    EXPECT_IS_OK(bluetooth->setEnabled(enabled))
+            << "setEnabled without actual state change must not fail";
+}
+
 class AudioCoreTelephony : public AudioCoreModuleBase, public testing::TestWithParam<std::string> {
   public:
     void SetUp() override {
@@ -2302,6 +2341,26 @@
                 << "when closing the stream twice";
     }
 
+    void PrepareToCloseTwice() {
+        const auto portConfig = moduleConfig->getSingleConfigForMixPort(IOTraits<Stream>::is_input);
+        if (!portConfig.has_value()) {
+            GTEST_SKIP() << "No mix port for attached devices";
+        }
+        std::shared_ptr<IStreamCommon> heldStreamCommon;
+        {
+            WithStream<Stream> stream(portConfig.value());
+            ASSERT_NO_FATAL_FAILURE(stream.SetUp(module.get(), kDefaultBufferSizeFrames));
+            std::shared_ptr<IStreamCommon> streamCommon;
+            ASSERT_IS_OK(stream.get()->getStreamCommon(&streamCommon));
+            heldStreamCommon = streamCommon;
+            EXPECT_IS_OK(streamCommon->prepareToClose());
+            EXPECT_IS_OK(streamCommon->prepareToClose())
+                    << "when calling prepareToClose second time";
+        }
+        EXPECT_STATUS(EX_ILLEGAL_STATE, heldStreamCommon->prepareToClose())
+                << "when calling prepareToClose on a closed stream";
+    }
+
     void OpenAllConfigs() {
         const auto allPortConfigs =
                 moduleConfig->getPortConfigsForMixPorts(IOTraits<Stream>::is_input);
@@ -2597,6 +2656,7 @@
     }
 
 TEST_IN_AND_OUT_STREAM(CloseTwice);
+TEST_IN_AND_OUT_STREAM(PrepareToCloseTwice);
 TEST_IN_AND_OUT_STREAM(GetStreamCommon);
 TEST_IN_AND_OUT_STREAM(OpenAllConfigs);
 TEST_IN_AND_OUT_STREAM(OpenInvalidBufferSize);
@@ -3520,6 +3580,10 @@
                          testing::ValuesIn(android::getAidlHalInstanceNames(IModule::descriptor)),
                          android::PrintInstanceNameToString);
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(AudioCoreBluetoothA2dp);
+INSTANTIATE_TEST_SUITE_P(AudioCoreBluetoothLeTest, AudioCoreBluetoothLe,
+                         testing::ValuesIn(android::getAidlHalInstanceNames(IModule::descriptor)),
+                         android::PrintInstanceNameToString);
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(AudioCoreBluetoothLe);
 INSTANTIATE_TEST_SUITE_P(AudioCoreTelephonyTest, AudioCoreTelephony,
                          testing::ValuesIn(android::getAidlHalInstanceNames(IModule::descriptor)),
                          android::PrintInstanceNameToString);
diff --git a/audio/aidl/vts/VtsHalDynamicsProcessingTest.cpp b/audio/aidl/vts/VtsHalDynamicsProcessingTest.cpp
index ece07f0..3e6fa7a 100644
--- a/audio/aidl/vts/VtsHalDynamicsProcessingTest.cpp
+++ b/audio/aidl/vts/VtsHalDynamicsProcessingTest.cpp
@@ -224,7 +224,7 @@
                     dpRef.get<DynamicsProcessing::inputGain>(),
                     dpTest.get<DynamicsProcessing::inputGain>());
         }
-        case DynamicsProcessing::vendorExtension: {
+        case DynamicsProcessing::vendor: {
             return false;
         }
     }
diff --git a/confirmationui/aidl/vts/functional/Android.bp b/confirmationui/aidl/vts/functional/Android.bp
index 3649c87..ac2d53a 100644
--- a/confirmationui/aidl/vts/functional/Android.bp
+++ b/confirmationui/aidl/vts/functional/Android.bp
@@ -23,7 +23,7 @@
     name: "VtsHalConfirmationUITargetTest",
     defaults: [
         "VtsHalTargetTestDefaults",
-        "keymint_use_latest_hal_aidl_ndk_shared",
+        "keymint_use_latest_hal_aidl_ndk_static",
         "use_libaidlvintf_gtest_helper_static",
     ],
     srcs: [
@@ -31,8 +31,9 @@
     ],
     static_libs: [
         "android.hardware.confirmationui-V1-ndk",
-        "libcn-cbor",
         "android.hardware.confirmationui-support-lib",
+        "android.hardware.security.secureclock-V1-ndk",
+        "libcn-cbor",
     ],
     shared_libs: [
         "libbinder_ndk",
diff --git a/gatekeeper/OWNERS b/gatekeeper/OWNERS
index fddc2ff..5262dce 100644
--- a/gatekeeper/OWNERS
+++ b/gatekeeper/OWNERS
@@ -1,4 +1,6 @@
 # Bug component: 1124862
-swillden@google.com
+drysdale@google.com
 guangzhu@google.com
+oarbildo@google.com
 subrahmanyaman@google.com
+swillden@google.com
diff --git a/gatekeeper/aidl/vts/functional/Android.bp b/gatekeeper/aidl/vts/functional/Android.bp
index 2fa80de..008f25c 100644
--- a/gatekeeper/aidl/vts/functional/Android.bp
+++ b/gatekeeper/aidl/vts/functional/Android.bp
@@ -24,14 +24,17 @@
     defaults: [
         "VtsHalTargetTestDefaults",
         "use_libaidlvintf_gtest_helper_static",
-        "keymint_use_latest_hal_aidl_ndk_shared",
+        "keymint_use_latest_hal_aidl_ndk_static",
     ],
     srcs: ["VtsHalGatekeeperTargetTest.cpp"],
     shared_libs: [
         "libbinder_ndk",
         "libbase",
     ],
-    static_libs: ["android.hardware.gatekeeper-V1-ndk"],
+    static_libs: [
+        "android.hardware.gatekeeper-V1-ndk",
+        "android.hardware.security.secureclock-V1-ndk",
+    ],
     test_suites: [
         "general-tests",
         "vts",
diff --git a/identity/aidl/android/hardware/identity/IIdentityCredential.aidl b/identity/aidl/android/hardware/identity/IIdentityCredential.aidl
index abdb00b..df8e2bd 100644
--- a/identity/aidl/android/hardware/identity/IIdentityCredential.aidl
+++ b/identity/aidl/android/hardware/identity/IIdentityCredential.aidl
@@ -370,7 +370,8 @@
      *  - issuer: CN shall be set to "Android Identity Credential Key". (fixed value:
      *    same on all certs)
      *
-     *  - validity: should be from current time and one year in the future (365 days).
+     *  - validity: should be from current time and 31536000 seconds in the
+     *    future (approximately 365 days).
      *
      *  - subjectPublicKeyInfo: must contain attested public key.
      *
diff --git a/vibrator/OWNERS b/vibrator/OWNERS
index 05e2e73..62a567e 100644
--- a/vibrator/OWNERS
+++ b/vibrator/OWNERS
@@ -2,7 +2,6 @@
 
 include platform/frameworks/base:/services/core/java/com/android/server/vibrator/OWNERS
 
-chasewu@google.com
 chrispaulo@google.com
 michaelwr@google.com
 nathankulczak@google.com
diff --git a/wifi/1.6/vts/functional/wifi_nan_iface_hidl_test.cpp b/wifi/1.6/vts/functional/wifi_nan_iface_hidl_test.cpp
index 7bcc6d3..37c55e7 100644
--- a/wifi/1.6/vts/functional/wifi_nan_iface_hidl_test.cpp
+++ b/wifi/1.6/vts/functional/wifi_nan_iface_hidl_test.cpp
@@ -68,17 +68,10 @@
 
     virtual void TearDown() override { stopWifi(GetInstanceName()); }
 
-    /* Used as a mechanism to inform the test about data/event callback */
-    inline void notify() {
-        std::unique_lock<std::mutex> lock(mtx_);
-        count_++;
-        cv_.notify_one();
-    }
 
     enum CallbackType {
-        INVALID = -2,
         ANY_CALLBACK = -1,
-
+        INVALID = 0,
         NOTIFY_CAPABILITIES_RESPONSE = 0,
         NOTIFY_ENABLE_RESPONSE,
         NOTIFY_CONFIG_RESPONSE,
@@ -114,8 +107,14 @@
         EVENT_DATA_PATH_CONFIRM_1_6,
     };
 
+    /* Used as a mechanism to inform the test about data/event callback */
+    inline void notify(CallbackType callbackType) {
+        std::unique_lock<std::mutex> lock(mtx_);
+        callbackEventBitMap |= (0x1 << callbackType);
+        cv_.notify_one();
+    }
     /* Test code calls this function to wait for data/event callback */
-    /* Must set callbackType = INVALID before call this function */
+    /* Must set callbackEventBitMap = INVALID before call this function */
     inline std::cv_status wait(CallbackType waitForCallbackType) {
         std::unique_lock<std::mutex> lock(mtx_);
 
@@ -124,15 +123,11 @@
 
         std::cv_status status = std::cv_status::no_timeout;
         auto now = std::chrono::system_clock::now();
-        while (count_ == 0) {
+        while (!(callbackEventBitMap & (0x1 << waitForCallbackType))) {
             status = cv_.wait_until(lock, now + std::chrono::seconds(TIMEOUT_PERIOD));
-            if (status == std::cv_status::timeout) return status;
-            if (waitForCallbackType != ANY_CALLBACK && callbackType != INVALID &&
-                callbackType != waitForCallbackType) {
-                count_--;
-            }
+            if (status == std::cv_status::timeout)
+                return status;
         }
-        count_--;
         return status;
     }
 
@@ -148,340 +143,276 @@
         Return<void> notifyCapabilitiesResponse(
                 uint16_t id, const WifiNanStatus& status,
                 const ::android::hardware::wifi::V1_0::NanCapabilities& capabilities) override {
-            parent_.callbackType = NOTIFY_CAPABILITIES_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
             parent_.capabilities = capabilities;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_CAPABILITIES_RESPONSE);
             return Void();
         }
 
         Return<void> notifyCapabilitiesResponse_1_5(
                 uint16_t id, const WifiNanStatus& status,
                 const ::android::hardware::wifi::V1_5::NanCapabilities& capabilities) override {
-            parent_.callbackType = NOTIFY_CAPABILITIES_RESPONSE_1_5;
-
             parent_.id = id;
             parent_.status = status;
             parent_.capabilities_1_5 = capabilities;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_CAPABILITIES_RESPONSE_1_5);
             return Void();
         }
 
         Return<void> notifyEnableResponse(uint16_t id, const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_ENABLE_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_ENABLE_RESPONSE);
             return Void();
         }
 
         Return<void> notifyConfigResponse(uint16_t id, const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_CONFIG_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_CONFIG_RESPONSE);
             return Void();
         }
 
         Return<void> notifyDisableResponse(uint16_t id, const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_DISABLE_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_DISABLE_RESPONSE);
             return Void();
         }
 
         Return<void> notifyStartPublishResponse(uint16_t id, const WifiNanStatus& status,
                                                 uint8_t sessionId) override {
-            parent_.callbackType = NOTIFY_START_PUBLISH_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
             parent_.sessionId = sessionId;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_START_PUBLISH_RESPONSE);
             return Void();
         }
 
         Return<void> notifyStopPublishResponse(uint16_t id, const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_STOP_PUBLISH_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_STOP_PUBLISH_RESPONSE);
             return Void();
         }
 
         Return<void> notifyStartSubscribeResponse(uint16_t id, const WifiNanStatus& status,
                                                   uint8_t sessionId) override {
-            parent_.callbackType = NOTIFY_START_SUBSCRIBE_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
             parent_.sessionId = sessionId;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_START_SUBSCRIBE_RESPONSE);
             return Void();
         }
 
         Return<void> notifyStopSubscribeResponse(uint16_t id,
                                                  const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_STOP_SUBSCRIBE_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_STOP_SUBSCRIBE_RESPONSE);
             return Void();
         }
 
         Return<void> notifyTransmitFollowupResponse(uint16_t id,
                                                     const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_TRANSMIT_FOLLOWUP_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_TRANSMIT_FOLLOWUP_RESPONSE);
             return Void();
         }
 
         Return<void> notifyCreateDataInterfaceResponse(uint16_t id,
                                                        const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_CREATE_DATA_INTERFACE_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_CREATE_DATA_INTERFACE_RESPONSE);
             return Void();
         }
 
         Return<void> notifyDeleteDataInterfaceResponse(uint16_t id,
                                                        const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_DELETE_DATA_INTERFACE_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_DELETE_DATA_INTERFACE_RESPONSE);
             return Void();
         }
 
         Return<void> notifyInitiateDataPathResponse(uint16_t id, const WifiNanStatus& status,
                                                     uint32_t ndpInstanceId) override {
-            parent_.callbackType = NOTIFY_INITIATE_DATA_PATH_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
             parent_.ndpInstanceId = ndpInstanceId;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_INITIATE_DATA_PATH_RESPONSE);
             return Void();
         }
 
         Return<void> notifyRespondToDataPathIndicationResponse(
                 uint16_t id, const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_RESPOND_TO_DATA_PATH_INDICATION_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_RESPOND_TO_DATA_PATH_INDICATION_RESPONSE);
             return Void();
         }
 
         Return<void> notifyTerminateDataPathResponse(uint16_t id,
                                                      const WifiNanStatus& status) override {
-            parent_.callbackType = NOTIFY_TERMINATE_DATA_PATH_RESPONSE;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_TERMINATE_DATA_PATH_RESPONSE);
             return Void();
         }
 
         Return<void> eventClusterEvent(const NanClusterEventInd& event) override {
-            parent_.callbackType = EVENT_CLUSTER_EVENT;
-
             parent_.nanClusterEventInd = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_CLUSTER_EVENT);
             return Void();
         }
 
         Return<void> eventDisabled(const WifiNanStatus& status) override {
-            parent_.callbackType = EVENT_DISABLED;
-
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(EVENT_DISABLED);
             return Void();
         }
 
         Return<void> eventPublishTerminated(uint8_t sessionId,
                                             const WifiNanStatus& status) override {
-            parent_.callbackType = EVENT_PUBLISH_TERMINATED;
-
             parent_.sessionId = sessionId;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(EVENT_PUBLISH_TERMINATED);
             return Void();
         }
 
         Return<void> eventSubscribeTerminated(uint8_t sessionId,
                                               const WifiNanStatus& status) override {
-            parent_.callbackType = EVENT_SUBSCRIBE_TERMINATED;
-
             parent_.sessionId = sessionId;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(EVENT_SUBSCRIBE_TERMINATED);
             return Void();
         }
 
         Return<void> eventMatch(
                 const ::android::hardware::wifi::V1_0::NanMatchInd& event) override {
-            parent_.callbackType = EVENT_MATCH;
-
             parent_.nanMatchInd = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_MATCH);
             return Void();
         }
 
         Return<void> eventMatchExpired(uint8_t discoverySessionId, uint32_t peerId) override {
-            parent_.callbackType = EVENT_MATCH_EXPIRED;
-
             parent_.sessionId = discoverySessionId;
             parent_.peerId = peerId;
 
-            parent_.notify();
+            parent_.notify(EVENT_MATCH_EXPIRED);
             return Void();
         }
 
         Return<void> eventFollowupReceived(const NanFollowupReceivedInd& event) override {
-            parent_.callbackType = EVENT_FOLLOWUP_RECEIVED;
-
             parent_.nanFollowupReceivedInd = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_FOLLOWUP_RECEIVED);
             return Void();
         }
 
         Return<void> eventTransmitFollowup(uint16_t id, const WifiNanStatus& status) override {
-            parent_.callbackType = EVENT_TRANSMIT_FOLLOWUP;
-
             parent_.id = id;
             parent_.status = status;
 
-            parent_.notify();
+            parent_.notify(EVENT_TRANSMIT_FOLLOWUP);
             return Void();
         }
 
         Return<void> eventDataPathRequest(const NanDataPathRequestInd& event) override {
-            parent_.callbackType = EVENT_DATA_PATH_REQUEST;
-
             parent_.nanDataPathRequestInd = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_REQUEST);
             return Void();
         }
 
         Return<void> eventDataPathConfirm(
                 const ::android::hardware::wifi::V1_0::NanDataPathConfirmInd& event) override {
-            parent_.callbackType = EVENT_DATA_PATH_CONFIRM;
-
             parent_.nanDataPathConfirmInd = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_CONFIRM);
             return Void();
         }
 
         Return<void> eventDataPathTerminated(uint32_t ndpInstanceId) override {
-            parent_.callbackType = EVENT_DATA_PATH_TERMINATED;
-
             parent_.ndpInstanceId = ndpInstanceId;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_TERMINATED);
             return Void();
         }
 
         Return<void> eventDataPathConfirm_1_2(
                 const ::android::hardware::wifi::V1_2::NanDataPathConfirmInd& event) override {
-            parent_.callbackType = EVENT_DATA_PATH_CONFIRM_1_2;
-
             parent_.nanDataPathConfirmInd_1_2 = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_CONFIRM_1_2);
             return Void();
         }
 
         Return<void> eventDataPathScheduleUpdate(
                 const ::android::hardware::wifi::V1_2::NanDataPathScheduleUpdateInd& event)
                 override {
-            parent_.callbackType = EVENT_DATA_PATH_SCHEDULE_UPDATE;
-
             parent_.nanDataPathScheduleUpdateInd_1_2 = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_SCHEDULE_UPDATE);
             return Void();
         }
 
         Return<void> eventMatch_1_6(
                 const ::android::hardware::wifi::V1_6::NanMatchInd& event) override {
-            parent_.callbackType = EVENT_MATCH_1_6;
-
             parent_.nanMatchInd_1_6 = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_MATCH_1_6);
             return Void();
         }
 
         Return<void> notifyCapabilitiesResponse_1_6(
                 uint16_t id, const WifiNanStatus& status,
                 const ::android::hardware::wifi::V1_6::NanCapabilities& capabilities) override {
-            parent_.callbackType = NOTIFY_CAPABILITIES_RESPONSE_1_6;
-
             parent_.id = id;
             parent_.status = status;
             parent_.capabilities_1_6 = capabilities;
 
-            parent_.notify();
+            parent_.notify(NOTIFY_CAPABILITIES_RESPONSE_1_6);
             return Void();
         }
 
         Return<void> eventDataPathScheduleUpdate_1_6(
                 const ::android::hardware::wifi::V1_6::NanDataPathScheduleUpdateInd& event)
                 override {
-            parent_.callbackType = EVENT_DATA_PATH_SCHEDULE_UPDATE_1_6;
-
             parent_.nanDataPathScheduleUpdateInd_1_6 = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_SCHEDULE_UPDATE_1_6);
             return Void();
         }
 
         Return<void> eventDataPathConfirm_1_6(
                 const ::android::hardware::wifi::V1_6::NanDataPathConfirmInd& event) override {
-            parent_.callbackType = EVENT_DATA_PATH_CONFIRM_1_6;
-
             parent_.nanDataPathConfirmInd_1_6 = event;
 
-            parent_.notify();
+            parent_.notify(EVENT_DATA_PATH_CONFIRM_1_6);
             return Void();
         }
     };
@@ -490,7 +421,6 @@
     // synchronization objects
     std::mutex mtx_;
     std::condition_variable cv_;
-    int count_ = 0;
 
   protected:
     android::sp<::android::hardware::wifi::V1_6::IWifiNanIface> iwifiNanIface;
@@ -498,7 +428,7 @@
     // Data from IWifiNanIfaceEventCallback callbacks: this is the collection of
     // all arguments to all callbacks. They are set by the callback
     // (notifications or events) and can be retrieved by tests.
-    CallbackType callbackType;
+    uint32_t callbackEventBitMap;
     uint16_t id;
     WifiNanStatus status;
     uint8_t sessionId;
@@ -535,7 +465,7 @@
  */
 TEST_P(WifiNanIfaceHidlTest, enableRequest_1_6InvalidArgs) {
     uint16_t inputCmdId = 10;
-    callbackType = INVALID;
+    callbackEventBitMap = INVALID;
     ::android::hardware::wifi::V1_4::NanEnableRequest nanEnableRequest = {};
     ::android::hardware::wifi::V1_6::NanConfigRequestSupplemental nanConfigRequestSupp = {};
     const auto& halStatus = HIDL_INVOKE(iwifiNanIface, enableRequest_1_6, inputCmdId,
@@ -545,7 +475,7 @@
 
         // wait for a callback
         ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_ENABLE_RESPONSE));
-        ASSERT_EQ(NOTIFY_ENABLE_RESPONSE, callbackType);
+        ASSERT_EQ(0x1 << NOTIFY_ENABLE_RESPONSE, callbackEventBitMap & (0x1 << NOTIFY_ENABLE_RESPONSE));
         ASSERT_EQ(id, inputCmdId);
         ASSERT_EQ(status.status, NanStatusType::INVALID_ARGS);
     }
@@ -572,7 +502,7 @@
  */
 TEST_P(WifiNanIfaceHidlTest, configRequest_1_6InvalidArgs) {
     uint16_t inputCmdId = 10;
-    callbackType = INVALID;
+    callbackEventBitMap = INVALID;
     ::android::hardware::wifi::V1_4::NanConfigRequest nanConfigRequest = {};
     ::android::hardware::wifi::V1_6::NanConfigRequestSupplemental nanConfigRequestSupp = {};
     const auto& halStatus = HIDL_INVOKE(iwifiNanIface, configRequest_1_6, inputCmdId,
@@ -583,7 +513,7 @@
 
         // wait for a callback
         ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_CONFIG_RESPONSE));
-        ASSERT_EQ(NOTIFY_CONFIG_RESPONSE, callbackType);
+        ASSERT_EQ(0x1 << NOTIFY_CONFIG_RESPONSE, callbackEventBitMap & (0x1 << NOTIFY_CONFIG_RESPONSE));
         ASSERT_EQ(id, inputCmdId);
         ASSERT_EQ(status.status, NanStatusType::INVALID_ARGS);
     }
@@ -610,12 +540,12 @@
  */
 TEST_P(WifiNanIfaceHidlTest, notifyCapabilitiesResponse_1_6) {
     uint16_t inputCmdId = 10;
-    callbackType = INVALID;
+    callbackEventBitMap = INVALID;
     const auto& halStatus = HIDL_INVOKE(iwifiNanIface, getCapabilitiesRequest_1_5, inputCmdId).code;
     ASSERT_EQ(WifiStatusCode::SUCCESS, halStatus);
     // wait for a callback
     ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_CAPABILITIES_RESPONSE_1_6));
-    ASSERT_EQ(NOTIFY_CAPABILITIES_RESPONSE_1_6, callbackType);
+    ASSERT_EQ(0x1 << NOTIFY_CAPABILITIES_RESPONSE_1_6, callbackEventBitMap & (0x1 << NOTIFY_CAPABILITIES_RESPONSE_1_6));
     ASSERT_EQ(id, inputCmdId);
     ASSERT_EQ(status.status, NanStatusType::SUCCESS);
 
@@ -711,7 +641,7 @@
     nanConfigRequestSupp.V1_5.V1_2.numberOfSpatialStreamsInDiscovery = 0;
     nanConfigRequestSupp.V1_5.V1_2.enableDiscoveryWindowEarlyTermination = false;
 
-    callbackType = INVALID;
+    callbackEventBitMap = INVALID;
 
     const auto& halStatus =
             HIDL_INVOKE(iwifiNanIface, enableRequest_1_6, inputCmdId, req, nanConfigRequestSupp);
@@ -720,7 +650,7 @@
 
         // wait for a callback
         ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_ENABLE_RESPONSE));
-        ASSERT_EQ(NOTIFY_ENABLE_RESPONSE, callbackType);
+        ASSERT_EQ(0x1 << NOTIFY_ENABLE_RESPONSE, callbackEventBitMap & (0x1 << NOTIFY_ENABLE_RESPONSE));
         ASSERT_EQ(id, inputCmdId);
         ASSERT_EQ(status.status, NanStatusType::SUCCESS);
     }
@@ -749,7 +679,7 @@
 
         // wait for a callback
         ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_START_PUBLISH_RESPONSE));
-        ASSERT_EQ(NOTIFY_START_PUBLISH_RESPONSE, callbackType);
+        ASSERT_EQ(0x1 << NOTIFY_START_PUBLISH_RESPONSE, callbackEventBitMap & (0x1 << NOTIFY_START_PUBLISH_RESPONSE));
         ASSERT_EQ(id, inputCmdId + 1);
         ASSERT_EQ(status.status, NanStatusType::SUCCESS);
     }
@@ -760,7 +690,7 @@
  */
 TEST_P(WifiNanIfaceHidlTest, respondToDataPathIndicationRequest_1_6ShimInvalidArgs) {
     uint16_t inputCmdId = 10;
-    callbackType = INVALID;
+    callbackEventBitMap = INVALID;
     ::android::hardware::wifi::V1_6::NanRespondToDataPathIndicationRequest
             nanRespondToDataPathIndicationRequest = {};
     nanRespondToDataPathIndicationRequest.ifaceName = "AwareinterfaceNameTooLong";
@@ -777,7 +707,7 @@
  */
 TEST_P(WifiNanIfaceHidlTest, initiateDataPathRequest_1_6ShimInvalidArgs) {
     uint16_t inputCmdId = 10;
-    callbackType = INVALID;
+    callbackEventBitMap = INVALID;
     ::android::hardware::wifi::V1_6::NanInitiateDataPathRequest nanInitiateDataPathRequest = {};
     nanInitiateDataPathRequest.ifaceName = "AwareinterfaceNameTooLong";
     const auto& halStatus = HIDL_INVOKE(iwifiNanIface, initiateDataPathRequest_1_6, inputCmdId,