diff --git a/graphics/composer/aidl/Android.bp b/graphics/composer/aidl/Android.bp
index 3b60f68..1728f78 100644
--- a/graphics/composer/aidl/Android.bp
+++ b/graphics/composer/aidl/Android.bp
@@ -37,6 +37,7 @@
     imports: [
         "android.hardware.graphics.common-V5",
         "android.hardware.common-V2",
+        "android.hardware.drm.common-V1",
     ],
     backend: {
         cpp: {
diff --git a/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerCallback.aidl b/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerCallback.aidl
index e64bd52..cd27360 100644
--- a/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerCallback.aidl
+++ b/graphics/composer/aidl/aidl_api/android.hardware.graphics.composer3/current/android/hardware/graphics/composer3/IComposerCallback.aidl
@@ -45,4 +45,5 @@
   oneway void onVsyncIdle(long display);
   oneway void onRefreshRateChangedDebug(in android.hardware.graphics.composer3.RefreshRateChangedDebugData data);
   void onHotplugEvent(long display, android.hardware.graphics.common.DisplayHotplugEvent event);
+  oneway void onHdcpLevelsChanged(long display, in android.hardware.drm.HdcpLevels levels);
 }
diff --git a/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerCallback.aidl b/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerCallback.aidl
index 96eccd7..a1d61fd 100644
--- a/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerCallback.aidl
+++ b/graphics/composer/aidl/android/hardware/graphics/composer3/IComposerCallback.aidl
@@ -16,6 +16,7 @@
 
 package android.hardware.graphics.composer3;
 
+import android.hardware.drm.HdcpLevels;
 import android.hardware.graphics.common.DisplayHotplugEvent;
 import android.hardware.graphics.composer3.RefreshRateChangedDebugData;
 import android.hardware.graphics.composer3.VsyncPeriodChangeTimeline;
@@ -139,4 +140,12 @@
      * @param event is the type of event that occurred.
      */
     void onHotplugEvent(long display, DisplayHotplugEvent event);
+
+    /**
+     * Notify the client the HDCP levels of the display changed.
+     *
+     * @param display is the display whose HDCP levels have changed.
+     * @param levels is the new HDCP levels.
+     */
+    oneway void onHdcpLevelsChanged(long display, in HdcpLevels levels);
 }
diff --git a/graphics/composer/aidl/vts/Android.bp b/graphics/composer/aidl/vts/Android.bp
index a2ab3d6..894ca52 100644
--- a/graphics/composer/aidl/vts/Android.bp
+++ b/graphics/composer/aidl/vts/Android.bp
@@ -66,6 +66,7 @@
         "android.hardware.graphics.common@1.2",
         "android.hardware.common-V2-ndk",
         "android.hardware.common.fmq-V1-ndk",
+        "android.hardware.drm.common-V1-ndk",
         "libaidlcommonsupport",
         "libarect",
         "libbase",
diff --git a/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp b/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp
index 544f692..1f7972c 100644
--- a/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp
+++ b/graphics/composer/aidl/vts/GraphicsComposerCallback.cpp
@@ -208,4 +208,15 @@
     }
 }
 
+::ndk::ScopedAStatus GraphicsComposerCallback::onHdcpLevelsChanged(
+        int64_t in_display, const ::aidl::android::hardware::drm::HdcpLevels&) {
+    std::scoped_lock lock(mMutex);
+
+    const auto it = std::find(mDisplays.begin(), mDisplays.end(), in_display);
+    if (it != mDisplays.end()) {
+        mHdcpLevelChangedCount++;
+    }
+    return ::ndk::ScopedAStatus::ok();
+}
+
 }  // namespace aidl::android::hardware::graphics::composer3::vts
diff --git a/graphics/composer/aidl/vts/GraphicsComposerCallback.h b/graphics/composer/aidl/vts/GraphicsComposerCallback.h
index 7a8d4a3..97f8e2b 100644
--- a/graphics/composer/aidl/vts/GraphicsComposerCallback.h
+++ b/graphics/composer/aidl/vts/GraphicsComposerCallback.h
@@ -65,6 +65,8 @@
             const RefreshRateChangedDebugData&) override;
     virtual ::ndk::ScopedAStatus onHotplugEvent(int64_t in_display,
                                                 common::DisplayHotplugEvent) override;
+    virtual ::ndk::ScopedAStatus onHdcpLevelsChanged(
+            int64_t in_display, const ::aidl::android::hardware::drm::HdcpLevels&) override;
 
     mutable std::mutex mMutex;
     // the set of all currently connected displays
@@ -88,6 +90,7 @@
     int32_t mInvalidVsyncPeriodChangeCount GUARDED_BY(mMutex) = 0;
     int32_t mInvalidSeamlessPossibleCount GUARDED_BY(mMutex) = 0;
     int32_t mInvalidRefreshRateDebugEnabledCallbackCount GUARDED_BY(mMutex) = 0;
+    int32_t mHdcpLevelChangedCount GUARDED_BY(mMutex) = 0;
 };
 
 }  // namespace aidl::android::hardware::graphics::composer3::vts