diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 5328a22..60b85c5 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -868,6 +868,14 @@
     result.append(mHwcDevice->dump().c_str());
 }
 
+std::optional<hwc2_display_t>
+HWComposer::getHwcDisplayId(int32_t displayId) const {
+    if (!isValidDisplay(displayId)) {
+        return {};
+    }
+    return mDisplayData[displayId].hwcDisplay->getId();
+}
+
 // ---------------------------------------------------------------------------
 
 HWComposer::DisplayData::DisplayData()
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index 3b6d931..74b3a38 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -33,6 +33,7 @@
 #include <utils/Vector.h>
 
 #include <memory>
+#include <optional>
 #include <set>
 #include <vector>
 
@@ -161,6 +162,8 @@
     void dump(String8& out) const;
 
     android::Hwc2::Composer* getComposer() const { return mHwcDevice->getComposer(); }
+
+    std::optional<hwc2_display_t> getHwcDisplayId(int32_t displayId) const;
 private:
     static const int32_t VIRTUAL_DISPLAY_ID_BASE = 2;