diff --git a/cmds/bootanimation/BootAnimation.cpp b/cmds/bootanimation/BootAnimation.cpp
index 8ffe5bf..ed6c25d 100644
--- a/cmds/bootanimation/BootAnimation.cpp
+++ b/cmds/bootanimation/BootAnimation.cpp
@@ -302,6 +302,7 @@
     mHeight = h;
     mFlingerSurfaceControl = control;
     mFlingerSurface = s;
+    mTargetInset = -1;
 
     // If the device has encryption turned on or is in process
     // of being encrypted we show the encrypted boot animation.
@@ -942,6 +943,7 @@
                 if (mClockEnabled && mTimeIsAccurate && validClock(part)) {
                     drawClock(animation.clockFont, part.clockPosX, part.clockPosY);
                 }
+                handleViewport(frameDuration);
 
                 eglSwapBuffers(mDisplay, mSurface);
 
@@ -966,7 +968,7 @@
             usleep(part.pause * ns2us(frameDuration));
 
             // For infinite parts, we've now played them at least once, so perhaps exit
-            if(exitPending() && !part.count)
+            if(exitPending() && !part.count && mCurrentInset >= mTargetInset)
                 break;
         }
 
@@ -986,6 +988,51 @@
     return true;
 }
 
+void BootAnimation::handleViewport(nsecs_t timestep) {
+    if (mShuttingDown || !mFlingerSurfaceControl || mTargetInset == 0) {
+        return;
+    }
+    if (mTargetInset < 0) {
+        // Poll the amount for the top display inset. This will return -1 until persistent properties
+        // have been loaded.
+        mTargetInset = android::base::GetIntProperty("persist.sys.displayinset.top",
+                -1 /* default */, -1 /* min */, mHeight / 2 /* max */);
+    }
+    if (mTargetInset <= 0) {
+        return;
+    }
+
+    if (mCurrentInset < mTargetInset) {
+        // After the device boots, the inset will effectively be cropped away. We animate this here.
+        float fraction = static_cast<float>(mCurrentInset) / mTargetInset;
+        int interpolatedInset = (cosf((fraction + 1) * M_PI) / 2.0f + 0.5f) * mTargetInset;
+
+        SurfaceComposerClient::Transaction()
+                .setCrop(mFlingerSurfaceControl, Rect(0, interpolatedInset, mWidth, mHeight))
+                .apply();
+    } else {
+        // At the end of the animation, we switch to the viewport that DisplayManager will apply
+        // later. This changes the coordinate system, and means we must move the surface up by
+        // the inset amount.
+        sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
+                ISurfaceComposer::eDisplayIdMain));
+
+        Rect layerStackRect(0, 0, mWidth, mHeight - mTargetInset);
+        Rect displayRect(0, mTargetInset, mWidth, mHeight);
+
+        SurfaceComposerClient::Transaction t;
+        t.setPosition(mFlingerSurfaceControl, 0, -mTargetInset)
+                .setCrop(mFlingerSurfaceControl, Rect(0, mTargetInset, mWidth, mHeight));
+        t.setDisplayProjection(dtoken, 0 /* orientation */, layerStackRect, displayRect);
+        t.apply();
+
+        mTargetInset = mCurrentInset = 0;
+    }
+
+    int delta = timestep * mTargetInset / ms2ns(200);
+    mCurrentInset += delta;
+}
+
 void BootAnimation::releaseAnimation(Animation* animation) const
 {
     for (Vector<Animation::Part>::iterator it = animation->parts.begin(),
diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index 56e131523..b4699d8 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -157,11 +157,15 @@
 
     void checkExit();
 
+    void handleViewport(nsecs_t timestep);
+
     sp<SurfaceComposerClient>       mSession;
     AssetManager mAssets;
     Texture     mAndroid[2];
     int         mWidth;
     int         mHeight;
+    int         mCurrentInset;
+    int         mTargetInset;
     bool        mUseNpotTextures = false;
     EGLDisplay  mDisplay;
     EGLDisplay  mContext;
diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 87b3349..ab0b88c 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -146,6 +146,7 @@
 import com.android.internal.os.SomeArgs;
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.FastPrintWriter;
+import com.android.internal.util.Preconditions;
 import com.android.internal.util.function.pooled.PooledLambda;
 import com.android.org.conscrypt.OpenSSLSocketImpl;
 import com.android.org.conscrypt.TrustedCertificateStore;
@@ -5144,6 +5145,16 @@
         }
     }
 
+    /**
+     * Updates the application info.
+     *
+     * This only works in the system process. Must be called on the main thread.
+     */
+    public void handleSystemApplicationInfoChanged(@NonNull ApplicationInfo ai) {
+        Preconditions.checkState(mSystemThread, "Must only be called in the system process");
+        handleApplicationInfoChanged(ai);
+    }
+
     void handleApplicationInfoChanged(@NonNull final ApplicationInfo ai) {
         // Updates triggered by package installation go through a package update
         // receiver. Here we try to capture ApplicationInfo changes that are
diff --git a/services/core/java/com/android/server/display/DisplayManagerService.java b/services/core/java/com/android/server/display/DisplayManagerService.java
index ddd8855..cc5a827 100644
--- a/services/core/java/com/android/server/display/DisplayManagerService.java
+++ b/services/core/java/com/android/server/display/DisplayManagerService.java
@@ -151,6 +151,8 @@
     // Otherwise WFD is enabled according to the value of config_enableWifiDisplay.
     private static final String FORCE_WIFI_DISPLAY_ENABLE = "persist.debug.wfd.enable";
 
+    private static final String PROP_DEFAULT_DISPLAY_TOP_INSET = "persist.sys.displayinset.top";
+
     private static final long WAIT_FOR_DEFAULT_DISPLAY_TIMEOUT = 10000;
 
     private static final int MSG_REGISTER_DEFAULT_DISPLAY_ADAPTERS = 1;
@@ -243,6 +245,15 @@
     // device).
     private Point mStableDisplaySize = new Point();
 
+    // Whether the system has finished booting or not.
+    private boolean mSystemReady;
+
+    // The top inset of the default display.
+    // This gets persisted so that the boot animation knows how to transition from the display's
+    // full size to the size configured by the user. Right now we only persist and animate the top
+    // inset, but theoretically we could do it for all of them.
+    private int mDefaultDisplayTopInset;
+
     // Viewports of the default display and the display that should receive touch
     // input from an external source.  Used by the input system.
     private final DisplayViewport mDefaultViewport = new DisplayViewport();
@@ -301,6 +312,7 @@
         Resources resources = mContext.getResources();
         mDefaultDisplayDefaultColorMode = mContext.getResources().getInteger(
                 com.android.internal.R.integer.config_defaultDisplayDefaultColorMode);
+        mDefaultDisplayTopInset = SystemProperties.getInt(PROP_DEFAULT_DISPLAY_TOP_INSET, -1);
         float[] lux = getFloatArray(resources.obtainTypedArray(
                 com.android.internal.R.array.config_minimumBrightnessCurveLux));
         float[] nits = getFloatArray(resources.obtainTypedArray(
@@ -311,6 +323,8 @@
         PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
         mGlobalDisplayBrightness = pm.getDefaultScreenBrightnessSetting();
         mCurrentUserId = UserHandle.USER_SYSTEM;
+
+        mSystemReady = false;
     }
 
     public void setupSchedulerPolicies() {
@@ -400,6 +414,10 @@
         synchronized (mSyncRoot) {
             mSafeMode = safeMode;
             mOnlyCore = onlyCore;
+            mSystemReady = true;
+            // Just in case the top inset changed before the system was ready. At this point, any
+            // relevant configuration should be in place.
+            recordTopInsetLocked(mLogicalDisplays.get(Display.DEFAULT_DISPLAY));
         }
 
         mHandler.sendEmptyMessage(MSG_REGISTER_ADDITIONAL_DISPLAY_ADAPTERS);
@@ -457,7 +475,7 @@
             LogicalDisplay display = mLogicalDisplays.get(displayId);
             if (display != null) {
                 if (display.setDisplayInfoOverrideFromWindowManagerLocked(info)) {
-                    sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
+                    handleLogicalDisplayChanged(displayId, display);
                     scheduleTraversalLocked(false);
                 }
             }
@@ -938,6 +956,13 @@
         scheduleTraversalLocked(false);
     }
 
+    private void handleLogicalDisplayChanged(int displayId, @NonNull LogicalDisplay display) {
+        if (displayId == Display.DEFAULT_DISPLAY) {
+            recordTopInsetLocked(display);
+        }
+        sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
+    }
+
     private void applyGlobalDisplayStateLocked(List<Runnable> workQueue) {
         final int count = mDisplayDevices.size();
         for (int i = 0; i < count; i++) {
@@ -991,6 +1016,7 @@
         configureColorModeLocked(display, device);
         if (isDefault) {
             recordStableDisplayStatsIfNeededLocked(display);
+            recordTopInsetLocked(display);
         }
 
         mLogicalDisplays.put(displayId, display);
@@ -1039,6 +1065,21 @@
         }
     }
 
+    private void recordTopInsetLocked(@Nullable LogicalDisplay d) {
+        // We must only persist the inset after boot has completed, otherwise we will end up
+        // overwriting the persisted value before the masking flag has been loaded from the
+        // resource overlay.
+        if (!mSystemReady || d == null) {
+            return;
+        }
+        int topInset = d.getInsets().top;
+        if (topInset == mDefaultDisplayTopInset) {
+            return;
+        }
+        mDefaultDisplayTopInset = topInset;
+        SystemProperties.set(PROP_DEFAULT_DISPLAY_TOP_INSET, Integer.toString(topInset));
+    }
+
     private void setStableDisplaySizeLocked(int width, int height) {
         mStableDisplaySize = new Point(width, height);
         try {
@@ -1118,7 +1159,7 @@
                 sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_REMOVED);
                 changed = true;
             } else if (!mTempDisplayInfo.equals(display.getDisplayInfoLocked())) {
-                sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
+                handleLogicalDisplayChanged(displayId, display);
                 changed = true;
             }
         }
diff --git a/services/core/java/com/android/server/display/LogicalDisplay.java b/services/core/java/com/android/server/display/LogicalDisplay.java
index 373de63..5b7c520 100644
--- a/services/core/java/com/android/server/display/LogicalDisplay.java
+++ b/services/core/java/com/android/server/display/LogicalDisplay.java
@@ -18,6 +18,7 @@
 
 import android.graphics.Rect;
 import android.hardware.display.DisplayManagerInternal;
+import android.os.SystemProperties;
 import android.view.Display;
 import android.view.DisplayInfo;
 import android.view.Surface;
@@ -57,6 +58,8 @@
  * </p>
  */
 final class LogicalDisplay {
+    private static final String PROP_MASKING_INSET_TOP = "persist.sys.displayinset.top";
+
     private final DisplayInfo mBaseDisplayInfo = new DisplayInfo();
 
     // The layer stack we use when the display has been blanked to prevent any
@@ -297,6 +300,17 @@
     }
 
     /**
+     * Return the insets currently applied to the display.
+     *
+     * Note that the base DisplayInfo already takes these insets into account, so if you want to
+     * find out the <b>true</b> size of the display, you need to add them back to the logical
+     * dimensions.
+     */
+    public Rect getInsets() {
+        return getMaskingInsets(mPrimaryDisplayDeviceInfo);
+    }
+
+    /**
      * Returns insets in ROTATION_0 for areas that are masked.
      */
     private static Rect getMaskingInsets(DisplayDeviceInfo deviceInfo) {
diff --git a/services/core/java/com/android/server/om/OverlayManagerService.java b/services/core/java/com/android/server/om/OverlayManagerService.java
index f082271..c738701 100644
--- a/services/core/java/com/android/server/om/OverlayManagerService.java
+++ b/services/core/java/com/android/server/om/OverlayManagerService.java
@@ -22,11 +22,14 @@
 import static android.content.Intent.ACTION_PACKAGE_REMOVED;
 import static android.content.Intent.ACTION_USER_ADDED;
 import static android.content.Intent.ACTION_USER_REMOVED;
+import static android.content.pm.PackageManager.GET_SHARED_LIBRARY_FILES;
+import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
 import static android.content.pm.PackageManager.SIGNATURE_MATCH;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.app.ActivityManager;
+import android.app.ActivityThread;
 import android.app.IActivityManager;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -34,6 +37,7 @@
 import android.content.IntentFilter;
 import android.content.om.IOverlayManager;
 import android.content.om.OverlayInfo;
+import android.content.pm.ApplicationInfo;
 import android.content.pm.IPackageManager;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManagerInternal;
@@ -269,13 +273,30 @@
 
     @Override
     public void onBootPhase(int phase) {
-        if (phase == PHASE_SYSTEM_SERVICES_READY) {
+        if (phase == PHASE_SYSTEM_SERVICES_READY && mInitCompleteSignal != null) {
             ConcurrentUtils.waitForFutureNoInterrupt(mInitCompleteSignal,
                     "Wait for OverlayManagerService init");
             mInitCompleteSignal = null;
         }
     }
 
+    public void updateSystemUiContext() {
+        if (mInitCompleteSignal != null) {
+            ConcurrentUtils.waitForFutureNoInterrupt(mInitCompleteSignal,
+                    "Wait for OverlayManagerService init");
+            mInitCompleteSignal = null;
+        }
+
+        final ApplicationInfo ai;
+        try {
+            ai = mPackageManager.mPackageManager.getApplicationInfo("android",
+                    GET_SHARED_LIBRARY_FILES, UserHandle.USER_SYSTEM);
+        } catch (RemoteException e) {
+            throw e.rethrowAsRuntimeException();
+        }
+        ActivityThread.currentActivityThread().handleSystemApplicationInfoChanged(ai);
+    }
+
     private void initIfNeeded() {
         final UserManager um = getContext().getSystemService(UserManager.class);
         final List<UserInfo> users = um.getUsers(true /*excludeDying*/);
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 3c833d8..a61970e 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -29,6 +29,7 @@
 import android.content.res.Resources.Theme;
 import android.database.sqlite.SQLiteCompatibilityWalFlags;
 import android.database.sqlite.SQLiteGlobal;
+import android.hardware.display.DisplayManagerInternal;
 import android.os.BaseBundle;
 import android.os.Binder;
 import android.os.Build;
@@ -677,9 +678,17 @@
 
         // Manages Overlay packages
         traceBeginAndSlog("StartOverlayManagerService");
-        mSystemServiceManager.startService(new OverlayManagerService(mSystemContext, installer));
+        OverlayManagerService overlayManagerService = new OverlayManagerService(
+                mSystemContext, installer);
+        mSystemServiceManager.startService(overlayManagerService);
         traceEnd();
 
+        if (SystemProperties.getInt("persist.sys.displayinset.top", 0) > 0) {
+            // DisplayManager needs the overlay immediately.
+            overlayManagerService.updateSystemUiContext();
+            LocalServices.getService(DisplayManagerInternal.class).onOverlayChanged();
+        }
+
         // The sensor service needs access to package manager service, app ops
         // service, and permissions service, therefore we start it after them.
         // Start sensor service in a separate thread. Completion should be checked