diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index 5964f632da1a1..2996c3d871201 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -3781,6 +3781,7 @@ public interface WindowManager extends ViewManager {
             out.writeInt(screenOrientation);
             out.writeFloat(preferredRefreshRate);
             out.writeInt(preferredDisplayModeId);
+            out.writeFloat(preferredMaxDisplayRefreshRate);
             out.writeInt(systemUiVisibility);
             out.writeInt(subtreeSystemUiVisibility);
             out.writeBoolean(hasSystemUiListeners);
@@ -3851,6 +3852,7 @@ public interface WindowManager extends ViewManager {
             screenOrientation = in.readInt();
             preferredRefreshRate = in.readFloat();
             preferredDisplayModeId = in.readInt();
+            preferredMaxDisplayRefreshRate = in.readFloat();
             systemUiVisibility = in.readInt();
             subtreeSystemUiVisibility = in.readInt();
             hasSystemUiListeners = in.readBoolean();
@@ -3928,6 +3930,8 @@ public interface WindowManager extends ViewManager {
         public static final int MINIMAL_POST_PROCESSING_PREFERENCE_CHANGED = 1 << 28;
         /** {@hide} */
         public static final int BLUR_BEHIND_RADIUS_CHANGED = 1 << 29;
+        /** {@hide} */
+        public static final int PREFERRED_MAX_DISPLAY_REFRESH_RATE = 1 << 30;
 
         // internal buffer to backup/restore parameters under compatibility mode.
         private int[] mCompatibilityParamsBackup = null;
@@ -4059,6 +4063,11 @@ public interface WindowManager extends ViewManager {
                 changes |= PREFERRED_DISPLAY_MODE_ID;
             }
 
+            if (preferredMaxDisplayRefreshRate != o.preferredMaxDisplayRefreshRate) {
+                preferredMaxDisplayRefreshRate = o.preferredMaxDisplayRefreshRate;
+                changes |= PREFERRED_MAX_DISPLAY_REFRESH_RATE;
+            }
+
             if (systemUiVisibility != o.systemUiVisibility
                     || subtreeSystemUiVisibility != o.subtreeSystemUiVisibility) {
                 systemUiVisibility = o.systemUiVisibility;
@@ -4263,6 +4272,10 @@ public interface WindowManager extends ViewManager {
                 sb.append(" preferredDisplayMode=");
                 sb.append(preferredDisplayModeId);
             }
+            if (preferredMaxDisplayRefreshRate != 0) {
+                sb.append(" preferredMaxDisplayRefreshRate=");
+                sb.append(preferredMaxDisplayRefreshRate);
+            }
             if (hasSystemUiListeners) {
                 sb.append(" sysuil=");
                 sb.append(hasSystemUiListeners);
diff --git a/services/tests/wmtests/src/com/android/server/wm/RefreshRatePolicyTest.java b/services/tests/wmtests/src/com/android/server/wm/RefreshRatePolicyTest.java
index 20b987de9aa14..e1696924dd3df 100644
--- a/services/tests/wmtests/src/com/android/server/wm/RefreshRatePolicyTest.java
+++ b/services/tests/wmtests/src/com/android/server/wm/RefreshRatePolicyTest.java
@@ -24,9 +24,11 @@ import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
+import android.os.Parcel;
 import android.platform.test.annotations.Presubmit;
 import android.view.Display.Mode;
 import android.view.DisplayInfo;
+import android.view.WindowManager.LayoutParams;
 
 import androidx.test.filters.FlakyTest;
 import androidx.test.filters.SmallTest;
@@ -50,6 +52,16 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
     private RefreshRatePolicy mPolicy;
     private HighRefreshRateDenylist mDenylist = mock(HighRefreshRateDenylist.class);
 
+    // Parcel and Unparcel the LayoutParams in the window state to test the path the object
+    // travels from the app's process to system server
+    void parcelLayoutParams(WindowState window) {
+        Parcel parcel = Parcel.obtain();
+        window.mAttrs.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        window.mAttrs.copyFrom(new LayoutParams(parcel));
+        parcel.recycle();
+    }
+
     @Before
     public void setUp() {
         DisplayInfo di = new DisplayInfo(mDisplayInfo);
@@ -69,6 +81,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
         final WindowState cameraUsingWindow = createWindow(null, TYPE_BASE_APPLICATION,
                 "cameraUsingWindow");
         cameraUsingWindow.mAttrs.packageName = "com.android.test";
+        parcelLayoutParams(cameraUsingWindow);
         assertEquals(0, mPolicy.getPreferredModeId(cameraUsingWindow));
         assertEquals(0, mPolicy.getPreferredRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);
         assertEquals(0, mPolicy.getPreferredMaxRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);
@@ -86,6 +99,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
         final WindowState denylistedWindow = createWindow(null, TYPE_BASE_APPLICATION,
                 "denylistedWindow");
         denylistedWindow.mAttrs.packageName = "com.android.test";
+        parcelLayoutParams(denylistedWindow);
         when(mDenylist.isDenylisted("com.android.test")).thenReturn(true);
         assertEquals(0, mPolicy.getPreferredModeId(denylistedWindow));
         assertEquals(60, mPolicy.getPreferredRefreshRate(denylistedWindow), FLOAT_TOLERANCE);
@@ -97,6 +111,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
                 "overrideWindow");
         overrideWindow.mAttrs.packageName = "com.android.test";
         overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;
+        parcelLayoutParams(overrideWindow);
         when(mDenylist.isDenylisted("com.android.test")).thenReturn(true);
         assertEquals(LOW_MODE_ID, mPolicy.getPreferredModeId(overrideWindow));
         assertEquals(60, mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);
@@ -108,6 +123,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
                 "overrideWindow");
         overrideWindow.mAttrs.packageName = "com.android.test";
         overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;
+        parcelLayoutParams(overrideWindow);
         mPolicy.addNonHighRefreshRatePackage("com.android.test");
         assertEquals(LOW_MODE_ID, mPolicy.getPreferredModeId(overrideWindow));
         assertEquals(0, mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);
@@ -120,6 +136,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
                 "overrideWindow");
         overrideWindow.mAttrs.packageName = "com.android.test";
         overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;
+        parcelLayoutParams(overrideWindow);
         overrideWindow.mActivityRecord.mSurfaceAnimator.startAnimation(
                 overrideWindow.getPendingTransaction(), mock(AnimationAdapter.class),
                 false /* hidden */, ANIMATION_TYPE_APP_TRANSITION);
@@ -134,6 +151,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
         final WindowState cameraUsingWindow = createWindow(null, TYPE_BASE_APPLICATION,
                 "cameraUsingWindow");
         cameraUsingWindow.mAttrs.packageName = "com.android.test";
+        parcelLayoutParams(cameraUsingWindow);
 
         mPolicy.addNonHighRefreshRatePackage("com.android.test");
         assertEquals(0, mPolicy.getPreferredModeId(cameraUsingWindow));
@@ -152,6 +170,7 @@ public class RefreshRatePolicyTest extends WindowTestsBase {
     public void testAppMaxRefreshRate() {
         final WindowState window = createWindow(null, TYPE_BASE_APPLICATION, "window");
         window.mAttrs.preferredMaxDisplayRefreshRate = 60f;
+        parcelLayoutParams(window);
         assertEquals(0, mPolicy.getPreferredModeId(window));
         assertEquals(0, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);
         assertEquals(60, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);