diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardDisplayManager.java b/packages/SystemUI/src/com/android/keyguard/KeyguardDisplayManager.java
index ec8fa921c6fab..9f21a31bd2c05 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardDisplayManager.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardDisplayManager.java
@@ -19,27 +19,34 @@ import android.app.Presentation;
 import android.content.Context;
 import android.graphics.Color;
 import android.graphics.Rect;
+import android.hardware.devicestate.DeviceStateManager;
 import android.hardware.display.DisplayManager;
 import android.media.MediaRouter;
 import android.media.MediaRouter.RouteInfo;
 import android.os.Bundle;
 import android.os.Trace;
+import android.text.TextUtils;
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.Display;
+import android.view.DisplayAddress;
 import android.view.DisplayInfo;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.WindowManager;
 
+import androidx.annotation.Nullable;
+
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.keyguard.dagger.KeyguardStatusViewComponent;
 import com.android.systemui.R;
+import com.android.systemui.dagger.SysUISingleton;
 import com.android.systemui.dagger.qualifiers.Main;
 import com.android.systemui.dagger.qualifiers.UiBackground;
 import com.android.systemui.navigationbar.NavigationBarController;
 import com.android.systemui.navigationbar.NavigationBarView;
 import com.android.systemui.settings.DisplayTracker;
+import com.android.systemui.statusbar.policy.KeyguardStateController;
 
 import java.util.concurrent.Executor;
 
@@ -47,6 +54,7 @@ import javax.inject.Inject;
 
 import dagger.Lazy;
 
+@SysUISingleton
 public class KeyguardDisplayManager {
     protected static final String TAG = "KeyguardDisplayManager";
     private static final boolean DEBUG = KeyguardConstants.DEBUG;
@@ -61,6 +69,9 @@ public class KeyguardDisplayManager {
     private boolean mShowing;
     private final DisplayInfo mTmpDisplayInfo = new DisplayInfo();
 
+    private final DeviceStateHelper mDeviceStateHelper;
+    private final KeyguardStateController mKeyguardStateController;
+
     private final SparseArray<Presentation> mPresentations = new SparseArray<>();
 
     private final DisplayTracker.Callback mDisplayCallback =
@@ -92,7 +103,9 @@ public class KeyguardDisplayManager {
             KeyguardStatusViewComponent.Factory keyguardStatusViewComponentFactory,
             DisplayTracker displayTracker,
             @Main Executor mainExecutor,
-            @UiBackground Executor uiBgExecutor) {
+            @UiBackground Executor uiBgExecutor,
+            DeviceStateHelper deviceStateHelper,
+            KeyguardStateController keyguardStateController) {
         mContext = context;
         mNavigationBarControllerLazy = navigationBarControllerLazy;
         mKeyguardStatusViewComponentFactory = keyguardStatusViewComponentFactory;
@@ -100,6 +113,8 @@ public class KeyguardDisplayManager {
         mDisplayService = mContext.getSystemService(DisplayManager.class);
         mDisplayTracker = displayTracker;
         mDisplayTracker.addDisplayChangeCallback(mDisplayCallback, mainExecutor);
+        mDeviceStateHelper = deviceStateHelper;
+        mKeyguardStateController = keyguardStateController;
     }
 
     private boolean isKeyguardShowable(Display display) {
@@ -122,6 +137,18 @@ public class KeyguardDisplayManager {
             }
             return false;
         }
+        if (mKeyguardStateController.isOccluded()
+                && mDeviceStateHelper.isConcurrentDisplayActive(display)) {
+            if (DEBUG) {
+                // When activities with FLAG_SHOW_WHEN_LOCKED are shown on top of Keyguard, the
+                // Keyguard state becomes "occluded". In this case, we should not show the
+                // KeyguardPresentation, since the activity is presenting content onto the
+                // non-default display.
+                Log.i(TAG, "Do not show KeyguardPresentation when occluded and concurrent"
+                        + " display is active");
+            }
+            return false;
+        }
 
         return true;
     }
@@ -260,6 +287,53 @@ public class KeyguardDisplayManager {
 
     }
 
+    /**
+     * Helper used to receive device state info from {@link DeviceStateManager}.
+     */
+    static class DeviceStateHelper implements DeviceStateManager.DeviceStateCallback {
+
+        @Nullable
+        private final DisplayAddress.Physical mRearDisplayPhysicalAddress;
+
+        // TODO(b/271317597): These device states should be defined in DeviceStateManager
+        private final int mConcurrentState;
+        private boolean mIsInConcurrentDisplayState;
+
+        @Inject
+        DeviceStateHelper(Context context,
+                DeviceStateManager deviceStateManager,
+                @Main Executor mainExecutor) {
+
+            final String rearDisplayPhysicalAddress = context.getResources().getString(
+                    com.android.internal.R.string.config_rearDisplayPhysicalAddress);
+            if (TextUtils.isEmpty(rearDisplayPhysicalAddress)) {
+                mRearDisplayPhysicalAddress = null;
+            } else {
+                mRearDisplayPhysicalAddress = DisplayAddress
+                        .fromPhysicalDisplayId(Long.parseLong(rearDisplayPhysicalAddress));
+            }
+
+            mConcurrentState = context.getResources().getInteger(
+                    com.android.internal.R.integer.config_deviceStateConcurrentRearDisplay);
+            deviceStateManager.registerCallback(mainExecutor, this);
+        }
+
+        @Override
+        public void onStateChanged(int state) {
+            // When concurrent state ends, the display also turns off. This is enforced in various
+            // ExtensionRearDisplayPresentationTest CTS tests. So, we don't need to invoke
+            // hide() since that will happen through the onDisplayRemoved callback.
+            mIsInConcurrentDisplayState = state == mConcurrentState;
+        }
+
+        boolean isConcurrentDisplayActive(Display display) {
+            return mIsInConcurrentDisplayState
+                    && mRearDisplayPhysicalAddress != null
+                    && mRearDisplayPhysicalAddress.equals(display.getAddress());
+        }
+    }
+
+
     @VisibleForTesting
     static final class KeyguardPresentation extends Presentation {
         private static final int VIDEO_SAFE_REGION = 80; // Percentage of display width & height
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardDisplayManagerTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardDisplayManagerTest.java
index 30e3d09299f2c..b3496967f5256 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardDisplayManagerTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardDisplayManagerTest.java
@@ -25,6 +25,7 @@ import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 import android.hardware.display.DisplayManagerGlobal;
 import android.testing.AndroidTestingRunner;
@@ -38,6 +39,7 @@ import com.android.keyguard.dagger.KeyguardStatusViewComponent;
 import com.android.systemui.SysuiTestCase;
 import com.android.systemui.navigationbar.NavigationBarController;
 import com.android.systemui.settings.FakeDisplayTracker;
+import com.android.systemui.statusbar.policy.KeyguardStateController;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -58,6 +60,10 @@ public class KeyguardDisplayManagerTest extends SysuiTestCase {
     private KeyguardStatusViewComponent.Factory mKeyguardStatusViewComponentFactory;
     @Mock
     private KeyguardDisplayManager.KeyguardPresentation mKeyguardPresentation;
+    @Mock
+    private KeyguardDisplayManager.DeviceStateHelper mDeviceStateHelper;
+    @Mock
+    private KeyguardStateController mKeyguardStateController;
 
     private Executor mMainExecutor = Runnable::run;
     private Executor mBackgroundExecutor = Runnable::run;
@@ -76,7 +82,7 @@ public class KeyguardDisplayManagerTest extends SysuiTestCase {
         MockitoAnnotations.initMocks(this);
         mManager = spy(new KeyguardDisplayManager(mContext, () -> mNavigationBarController,
                 mKeyguardStatusViewComponentFactory, mDisplayTracker, mMainExecutor,
-                mBackgroundExecutor));
+                mBackgroundExecutor, mDeviceStateHelper, mKeyguardStateController));
         doReturn(mKeyguardPresentation).when(mManager).createPresentation(any());
 
         mDefaultDisplay = new Display(DisplayManagerGlobal.getInstance(), Display.DEFAULT_DISPLAY,
@@ -123,4 +129,13 @@ public class KeyguardDisplayManagerTest extends SysuiTestCase {
         mManager.show();
         verify(mManager, times(1)).createPresentation(eq(mSecondaryDisplay));
     }
+
+    @Test
+    public void testShow_concurrentDisplayActive_occluded() {
+        mDisplayTracker.setAllDisplays(new Display[]{mDefaultDisplay, mSecondaryDisplay});
+
+        when(mDeviceStateHelper.isConcurrentDisplayActive(mSecondaryDisplay)).thenReturn(true);
+        when(mKeyguardStateController.isOccluded()).thenReturn(true);
+        verify(mManager, never()).createPresentation(eq(mSecondaryDisplay));
+    }
 }