diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index fea9f81..c5dec19 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -180,7 +180,6 @@
         "FrameTimelineInfo.cpp",
         "GLConsumer.cpp",
         "IConsumerListener.cpp",
-        "IDisplayEventConnection.cpp",
         "IGraphicBufferConsumer.cpp",
         "IGraphicBufferProducer.cpp",
         "IProducerListener.cpp",
diff --git a/libs/gui/DisplayEventReceiver.cpp b/libs/gui/DisplayEventReceiver.cpp
index 03b33c7..b916e48 100644
--- a/libs/gui/DisplayEventReceiver.cpp
+++ b/libs/gui/DisplayEventReceiver.cpp
@@ -19,7 +19,6 @@
 #include <utils/Errors.h>
 
 #include <gui/DisplayEventReceiver.h>
-#include <gui/IDisplayEventConnection.h>
 #include <gui/ISurfaceComposer.h>
 
 #include <private/gui/ComposerService.h>
diff --git a/libs/gui/IDisplayEventConnection.cpp b/libs/gui/IDisplayEventConnection.cpp
deleted file mode 100644
index c0e246f..0000000
--- a/libs/gui/IDisplayEventConnection.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2011 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.
- */
-
-#include <gui/IDisplayEventConnection.h>
-
-#include <private/gui/BitTube.h>
-
-namespace android {
-
-namespace { // Anonymous
-
-enum class Tag : uint32_t {
-    STEAL_RECEIVE_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
-    SET_VSYNC_RATE,
-    REQUEST_NEXT_VSYNC,
-    LAST = REQUEST_NEXT_VSYNC,
-};
-
-} // Anonymous namespace
-
-class BpDisplayEventConnection : public SafeBpInterface<IDisplayEventConnection> {
-public:
-    explicit BpDisplayEventConnection(const sp<IBinder>& impl)
-          : SafeBpInterface<IDisplayEventConnection>(impl, "BpDisplayEventConnection") {}
-
-    ~BpDisplayEventConnection() override;
-
-    status_t stealReceiveChannel(gui::BitTube* outChannel) override {
-        return callRemote<decltype(
-                &IDisplayEventConnection::stealReceiveChannel)>(Tag::STEAL_RECEIVE_CHANNEL,
-                                                                outChannel);
-    }
-
-    status_t setVsyncRate(uint32_t count) override {
-        return callRemote<decltype(&IDisplayEventConnection::setVsyncRate)>(Tag::SET_VSYNC_RATE,
-                                                                            count);
-    }
-
-    void requestNextVsync() override {
-        callRemoteAsync<decltype(&IDisplayEventConnection::requestNextVsync)>(
-                Tag::REQUEST_NEXT_VSYNC);
-    }
-};
-
-// Out-of-line virtual method definition to trigger vtable emission in this translation unit (see
-// clang warning -Wweak-vtables)
-BpDisplayEventConnection::~BpDisplayEventConnection() = default;
-
-IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
-
-status_t BnDisplayEventConnection::onTransact(uint32_t code, const Parcel& data, Parcel* reply,
-                                              uint32_t flags) {
-    if (code < IBinder::FIRST_CALL_TRANSACTION || code > static_cast<uint32_t>(Tag::LAST)) {
-        return BBinder::onTransact(code, data, reply, flags);
-    }
-    auto tag = static_cast<Tag>(code);
-    switch (tag) {
-        case Tag::STEAL_RECEIVE_CHANNEL:
-            return callLocal(data, reply, &IDisplayEventConnection::stealReceiveChannel);
-        case Tag::SET_VSYNC_RATE:
-            return callLocal(data, reply, &IDisplayEventConnection::setVsyncRate);
-        case Tag::REQUEST_NEXT_VSYNC:
-            return callLocalAsync(data, reply, &IDisplayEventConnection::requestNextVsync);
-    }
-}
-
-} // namespace android
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index a90f755..7f73013 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -17,12 +17,12 @@
 // tag as surfaceflinger
 #define LOG_TAG "SurfaceFlinger"
 
+#include <android/gui/IDisplayEventConnection.h>
 #include <android/gui/IRegionSamplingListener.h>
 #include <android/gui/ITransactionTraceListener.h>
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
 #include <binder/Parcel.h>
-#include <gui/IDisplayEventConnection.h>
 #include <gui/IGraphicBufferProducer.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/ISurfaceComposerClient.h>
@@ -44,6 +44,7 @@
 
 namespace android {
 
+using gui::IDisplayEventConnection;
 using gui::IRegionSamplingListener;
 using gui::IWindowInfosListener;
 using ui::ColorMode;
diff --git a/libs/gui/aidl/android/gui/BitTube.aidl b/libs/gui/aidl/android/gui/BitTube.aidl
new file mode 100644
index 0000000..6b0595e
--- /dev/null
+++ b/libs/gui/aidl/android/gui/BitTube.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2021 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.gui;
+
+parcelable BitTube cpp_header "private/gui/BitTube.h";
diff --git a/libs/gui/aidl/android/gui/IDisplayEventConnection.aidl b/libs/gui/aidl/android/gui/IDisplayEventConnection.aidl
new file mode 100644
index 0000000..9f41593
--- /dev/null
+++ b/libs/gui/aidl/android/gui/IDisplayEventConnection.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 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.gui;
+
+import android.gui.BitTube;
+
+/** @hide */
+interface IDisplayEventConnection {
+    /*
+     * stealReceiveChannel() returns a BitTube to receive events from. Only the receive file
+     * descriptor of outChannel will be initialized, and this effectively "steals" the receive
+     * channel from the remote end (such that the remote end can only use its send channel).
+     */
+    void stealReceiveChannel(out BitTube outChannel);
+
+    /*
+     * setVsyncRate() sets the vsync event delivery rate. A value of 1 returns every vsync event.
+     * A value of 2 returns every other event, etc. A value of 0 returns no event unless
+     * requestNextVsync() has been called.
+     */
+    void setVsyncRate(in int count);
+
+    /*
+     * requestNextVsync() schedules the next vsync event. It has no effect if the vsync rate is > 0.
+     */
+    oneway void requestNextVsync(); // Asynchronous
+}
diff --git a/libs/gui/include/gui/DisplayEventReceiver.h b/libs/gui/include/gui/DisplayEventReceiver.h
index ca36843..456bbfb 100644
--- a/libs/gui/include/gui/DisplayEventReceiver.h
+++ b/libs/gui/include/gui/DisplayEventReceiver.h
@@ -33,7 +33,7 @@
 
 // ----------------------------------------------------------------------------
 
-class IDisplayEventConnection;
+using gui::IDisplayEventConnection;
 
 namespace gui {
 class BitTube;
diff --git a/libs/gui/include/gui/IDisplayEventConnection.h b/libs/gui/include/gui/IDisplayEventConnection.h
deleted file mode 100644
index cff22a3..0000000
--- a/libs/gui/include/gui/IDisplayEventConnection.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright (C) 2011 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.
- */
-
-#pragma once
-
-#include <binder/IInterface.h>
-#include <binder/SafeInterface.h>
-#include <gui/ISurfaceComposer.h>
-#include <utils/Errors.h>
-
-#include <cstdint>
-
-namespace android {
-
-namespace gui {
-class BitTube;
-} // namespace gui
-
-class IDisplayEventConnection : public IInterface {
-public:
-    DECLARE_META_INTERFACE(DisplayEventConnection)
-
-    /*
-     * stealReceiveChannel() returns a BitTube to receive events from. Only the receive file
-     * descriptor of outChannel will be initialized, and this effectively "steals" the receive
-     * channel from the remote end (such that the remote end can only use its send channel).
-     */
-    virtual status_t stealReceiveChannel(gui::BitTube* outChannel) = 0;
-
-    /*
-     * setVsyncRate() sets the vsync event delivery rate. A value of 1 returns every vsync event.
-     * A value of 2 returns every other event, etc. A value of 0 returns no event unless
-     * requestNextVsync() has been called.
-     */
-    virtual status_t setVsyncRate(uint32_t count) = 0;
-
-    /*
-     * requestNextVsync() schedules the next vsync event. It has no effect if the vsync rate is > 0.
-     */
-    virtual void requestNextVsync() = 0; // Asynchronous
-};
-
-class BnDisplayEventConnection : public SafeBnInterface<IDisplayEventConnection> {
-public:
-    BnDisplayEventConnection()
-          : SafeBnInterface<IDisplayEventConnection>("BnDisplayEventConnection") {}
-
-    status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply,
-                        uint32_t flags = 0) override;
-};
-
-} // namespace android
diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index e1e9182..2546e4c 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <android/gui/DisplayBrightness.h>
+#include <android/gui/IDisplayEventConnection.h>
 #include <android/gui/IFpsListener.h>
 #include <android/gui/IHdrLayerInfoListener.h>
 #include <android/gui/IRegionSamplingListener.h>
@@ -61,12 +62,12 @@
 struct LayerCaptureArgs;
 class LayerDebugInfo;
 class HdrCapabilities;
-class IDisplayEventConnection;
 class IGraphicBufferProducer;
 class ISurfaceComposerClient;
 class Rect;
 enum class FrameEvent;
 
+using gui::IDisplayEventConnection;
 using gui::IRegionSamplingListener;
 using gui::IScreenCaptureListener;
 
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index e0c2aa7..d6ac3f9 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -19,11 +19,11 @@
 #include <gtest/gtest.h>
 
 #include <SurfaceFlingerProperties.h>
+#include <android/gui/IDisplayEventConnection.h>
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <binder/ProcessState.h>
 #include <configstore/Utils.h>
 #include <gui/BufferItemConsumer.h>
-#include <gui/IDisplayEventConnection.h>
 #include <gui/IProducerListener.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/Surface.h>
@@ -45,6 +45,7 @@
 // retrieve wide-color and hdr settings from configstore
 using namespace android::hardware::configstore;
 using namespace android::hardware::configstore::V1_0;
+using gui::IDisplayEventConnection;
 using gui::IRegionSamplingListener;
 using ui::ColorMode;