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diff --git a/hwc2_device/DrmHwcTwo.h b/hwc2_device/DrmHwcTwo.h
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+++ b/hwc2_device/DrmHwcTwo.h
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef ANDROID_DRM_HWC_TWO_H_
+#define ANDROID_DRM_HWC_TWO_H_
+
+#include <hardware/hwcomposer2.h>
+
+#include "drm/ResourceManager.h"
+#include "hwc2_device/HwcDisplay.h"
+
+namespace android {
+
+class DrmHwcTwo : public PipelineToFrontendBindingInterface {
+ public:
+  DrmHwcTwo();
+  ~DrmHwcTwo() override = default;
+
+  std::pair<HWC2_PFN_HOTPLUG, hwc2_callback_data_t> hotplug_callback_{};
+  std::pair<HWC2_PFN_VSYNC, hwc2_callback_data_t> vsync_callback_{};
+#if PLATFORM_SDK_VERSION > 29
+  std::pair<HWC2_PFN_VSYNC_2_4, hwc2_callback_data_t> vsync_2_4_callback_{};
+  std::pair<HWC2_PFN_VSYNC_PERIOD_TIMING_CHANGED, hwc2_callback_data_t>
+      period_timing_changed_callback_{};
+#endif
+  std::pair<HWC2_PFN_REFRESH, hwc2_callback_data_t> refresh_callback_{};
+
+  // Device functions
+  HWC2::Error CreateVirtualDisplay(uint32_t width, uint32_t height,
+                                   int32_t *format, hwc2_display_t *display);
+  HWC2::Error DestroyVirtualDisplay(hwc2_display_t display);
+  void Dump(uint32_t *outSize, char *outBuffer);
+  uint32_t GetMaxVirtualDisplayCount();
+  HWC2::Error RegisterCallback(int32_t descriptor, hwc2_callback_data_t data,
+                               hwc2_function_pointer_t function);
+
+  auto GetDisplay(hwc2_display_t display_handle) {
+    return displays_.count(display_handle) != 0
+               ? displays_[display_handle].get()
+               : nullptr;
+  }
+
+  auto &GetResMan() {
+    return resource_manager_;
+  }
+
+  void ScheduleHotplugEvent(hwc2_display_t displayid, bool connected) {
+    deferred_hotplug_events_[displayid] = connected;
+  }
+
+  // PipelineToFrontendBindingInterface
+  bool BindDisplay(DrmDisplayPipeline *pipeline) override;
+  bool UnbindDisplay(DrmDisplayPipeline *pipeline) override;
+  void FinalizeDisplayBinding() override;
+
+  void SendVsyncEventToClient(hwc2_display_t displayid, int64_t timestamp,
+                              uint32_t vsync_period) const;
+  void SendVsyncPeriodTimingChangedEventToClient(hwc2_display_t displayid,
+                                                 int64_t timestamp) const;
+
+ private:
+  void SendHotplugEventToClient(hwc2_display_t displayid, bool connected);
+
+  ResourceManager resource_manager_;
+  std::map<hwc2_display_t, std::unique_ptr<HwcDisplay>> displays_;
+  std::map<DrmDisplayPipeline *, hwc2_display_t> display_handles_;
+
+  std::string mDumpString;
+
+  std::map<hwc2_display_t, bool> deferred_hotplug_events_;
+  std::vector<hwc2_display_t> displays_for_removal_list_;
+
+  uint32_t last_display_handle_ = kPrimaryDisplay;
+};
+}  // namespace android
+
+#endif