diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index 06be1b3..f2bae98 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -30,6 +30,7 @@
 #include <ui/FrameStats.h>
 #include <ui/GraphicBuffer.h>
 #include <ui/GraphicTypes.h>
+#include <ui/PhysicalDisplayId.h>
 #include <ui/PixelFormat.h>
 
 #include <utils/Errors.h>
diff --git a/libs/ui/include/ui/GraphicTypes.h b/libs/ui/include/ui/GraphicTypes.h
index 5dc56c8..d7411ea 100644
--- a/libs/ui/include/ui/GraphicTypes.h
+++ b/libs/ui/include/ui/GraphicTypes.h
@@ -16,19 +16,12 @@
 
 #pragma once
 
-#include <cinttypes>
-#include <cstdint>
-
 #include <android/hardware/graphics/common/1.1/types.h>
 #include <android/hardware/graphics/common/1.2/types.h>
 #include <system/graphics.h>
 
-#define ANDROID_PHYSICAL_DISPLAY_ID_FORMAT PRIu64
-
 namespace android {
 
-using PhysicalDisplayId = uint64_t;
-
 // android::ui::* in this header file will alias different types as
 // the HIDL interface is updated.
 namespace ui {
diff --git a/libs/ui/include/ui/PhysicalDisplayId.h b/libs/ui/include/ui/PhysicalDisplayId.h
new file mode 100644
index 0000000..1a345ac
--- /dev/null
+++ b/libs/ui/include/ui/PhysicalDisplayId.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2019 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 <cinttypes>
+#include <cstdint>
+
+#define ANDROID_PHYSICAL_DISPLAY_ID_FORMAT PRIu64
+
+namespace android {
+
+using PhysicalDisplayId = uint64_t;
+
+constexpr uint8_t getPhysicalDisplayPort(PhysicalDisplayId displayId) {
+    return static_cast<uint8_t>(displayId);
+}
+
+} // namespace android
diff --git a/libs/ui/include_vndk/ui/PhysicalDisplayId.h b/libs/ui/include_vndk/ui/PhysicalDisplayId.h
new file mode 120000
index 0000000..6e3fb1e
--- /dev/null
+++ b/libs/ui/include_vndk/ui/PhysicalDisplayId.h
@@ -0,0 +1 @@
+../../include/ui/PhysicalDisplayId.h
\ No newline at end of file
diff --git a/services/surfaceflinger/DisplayHardware/DisplayIdentification.h b/services/surfaceflinger/DisplayHardware/DisplayIdentification.h
index d63cd79..22b268a 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayIdentification.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayIdentification.h
@@ -23,7 +23,7 @@
 #include <string_view>
 #include <vector>
 
-#include <ui/GraphicTypes.h>
+#include <ui/PhysicalDisplayId.h>
 
 namespace android {