diff --git a/hwc3/DrmHwcThree.cpp b/hwc3/DrmHwcThree.cpp
new file mode 100644
index 0000000..62984b4
--- /dev/null
+++ b/hwc3/DrmHwcThree.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2024 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 "DrmHwcThree.h"
+
+#include <cinttypes>
+
+namespace aidl::android::hardware::graphics::composer3::impl {
+
+void DrmHwcThree::Init(std::shared_ptr<IComposerCallback> callback) {
+  composer_callback_ = std::move(callback);
+  GetResMan().Init();
+}
+
+void DrmHwcThree::SendVsyncPeriodTimingChangedEventToClient(
+    uint64_t display_id, int64_t timestamp) const {
+  VsyncPeriodChangeTimeline timeline;
+  timeline.newVsyncAppliedTimeNanos = timestamp;
+  timeline.refreshRequired = false;
+  timeline.refreshTimeNanos = 0;
+
+  composer_callback_->onVsyncPeriodTimingChanged(static_cast<int64_t>(
+                                                     display_id),
+                                                 timeline);
+}
+
+void DrmHwcThree::SendRefreshEventToClient(uint64_t display_id) {
+  composer_callback_->onRefresh(static_cast<int64_t>(display_id));
+}
+
+void DrmHwcThree::SendVsyncEventToClient(uint64_t display_id, int64_t timestamp,
+                                         uint32_t vsync_period) const {
+  composer_callback_->onVsync(static_cast<int64_t>(display_id), timestamp,
+                              static_cast<int32_t>(vsync_period));
+}
+
+void DrmHwcThree::SendHotplugEventToClient(hwc2_display_t display_id,
+                                           bool connected) {
+  composer_callback_->onHotplug(static_cast<int64_t>(display_id), connected);
+}
+
+}  // namespace aidl::android::hardware::graphics::composer3::impl