Hide HDR output control feature behind feature flag.

Bug: 234816344
Test: atest HdrConversionTest
Change-Id: I4209b0dbba7570ee850b2a9fda7b4af31d1f70ed

core/api/test-current.txt

@@ -1444,6 +1444,7 @@ package android.hardware.display {
     method @RequiresPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS) public void setUserDisabledHdrTypes(@NonNull int[]);
     method @RequiresPermission(android.Manifest.permission.OVERRIDE_DISPLAY_MODE_REQUESTS) public boolean shouldAlwaysRespectAppRequestedMode();
     field public static final String DISPLAY_CATEGORY_REAR = "android.hardware.display.category.REAR";
+    field public static final String HDR_OUTPUT_CONTROL_FLAG = "enable_hdr_output_control";
     field public static final int SWITCHING_TYPE_ACROSS_AND_WITHIN_GROUPS = 2; // 0x2
     field public static final int SWITCHING_TYPE_NONE = 0; // 0x0
     field public static final int SWITCHING_TYPE_RENDER_FRAME_RATE_ONLY = 3; // 0x3

core/java/android/hardware/display/DisplayManager.java

@@ -68,6 +68,15 @@ public final class DisplayManager {
     private static final boolean DEBUG = false;
     private static final boolean ENABLE_VIRTUAL_DISPLAY_REFRESH_RATE = true;
 
+    /**
+     * The hdr output control feature flag, the value should be read via
+     * {@link android.provider.DeviceConfig#getBoolean(String, String, boolean)} with
+     * {@link android.provider.DeviceConfig#NAMESPACE_DISPLAY_MANAGER} as the namespace.
+     * @hide
+     */
+    @TestApi
+    public static final String HDR_OUTPUT_CONTROL_FLAG = "enable_hdr_output_control";
+
     private final Context mContext;
     private final DisplayManagerGlobal mGlobal;
 

services/core/java/com/android/server/display/DisplayManagerService.java

@@ -24,6 +24,7 @@ import static android.Manifest.permission.INTERNAL_SYSTEM_WINDOW;
 import static android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_CACHED;
 import static android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_GONE;
 import static android.hardware.display.DisplayManager.EventsMask;
+import static android.hardware.display.DisplayManager.HDR_OUTPUT_CONTROL_FLAG;
 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_ALWAYS_UNLOCKED;
 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR;
 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD;
@@ -38,8 +39,10 @@ import static android.hardware.display.DisplayManagerGlobal.DisplayEvent;
 import static android.hardware.display.DisplayViewport.VIEWPORT_EXTERNAL;
 import static android.hardware.display.DisplayViewport.VIEWPORT_INTERNAL;
 import static android.hardware.display.DisplayViewport.VIEWPORT_VIRTUAL;
+import static android.hardware.display.HdrConversionMode.HDR_CONVERSION_UNSUPPORTED;
 import static android.os.Process.FIRST_APPLICATION_UID;
 import static android.os.Process.ROOT_UID;
+import static android.provider.DeviceConfig.NAMESPACE_DISPLAY_MANAGER;
 
 import android.Manifest;
 import android.annotation.NonNull;
@@ -137,6 +140,7 @@ import android.window.ScreenCapture;
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.display.BrightnessSynchronizer;
+import com.android.internal.os.BackgroundThread;
 import com.android.internal.util.DumpUtils;
 import com.android.internal.util.FrameworkStatsLog;
 import com.android.internal.util.IndentingPrintWriter;
@@ -232,6 +236,9 @@ public final class DisplayManagerService extends SystemService {
     private static final int MSG_LOAD_BRIGHTNESS_CONFIGURATIONS = 6;
     private static final int MSG_DELIVER_DISPLAY_EVENT_FRAME_RATE_OVERRIDE = 7;
     private static final int MSG_DELIVER_DISPLAY_GROUP_EVENT = 8;
+    private static final int[] EMPTY_ARRAY = new int[0];
+    private static final HdrConversionMode HDR_CONVERSION_MODE_UNSUPPORTED = new HdrConversionMode(
+            HDR_CONVERSION_UNSUPPORTED);
 
     private final Context mContext;
     private final DisplayManagerHandler mHandler;
@@ -250,6 +257,10 @@ public final class DisplayManagerService extends SystemService {
     @GuardedBy("mSyncRoot")
     private boolean mAreUserDisabledHdrTypesAllowed = true;
 
+    // This value indicates whether or not HDR output control is enabled.
+    // It is read from DeviceConfig and is updated via a listener if the config changes.
+    private volatile boolean mIsHdrOutputControlEnabled;
+
     // Display mode chosen by user.
     private Display.Mode mUserPreferredMode;
     // HDR conversion mode chosen by user
@@ -674,6 +685,11 @@ public final class DisplayManagerService extends SystemService {
         synchronized (mSyncRoot) {
             mSafeMode = safeMode;
             mSystemReady = true;
+            mIsHdrOutputControlEnabled = isDeviceConfigHdrOutputControlEnabled();
+            DeviceConfig.addOnPropertiesChangedListener(NAMESPACE_DISPLAY_MANAGER,
+                    BackgroundThread.getExecutor(),
+                    properties -> mIsHdrOutputControlEnabled =
+                            isDeviceConfigHdrOutputControlEnabled());
             // Just in case the top inset changed before the system was ready. At this point, any
             // relevant configuration should be in place.
             recordTopInsetLocked(mLogicalDisplayMapper.getDisplayLocked(Display.DEFAULT_DISPLAY));
@@ -681,7 +697,9 @@ public final class DisplayManagerService extends SystemService {
             updateSettingsLocked();
             updateUserDisabledHdrTypesFromSettingsLocked();
             updateUserPreferredDisplayModeSettingsLocked();
-            updateHdrConversionModeSettingsLocked();
+            if (mIsHdrOutputControlEnabled) {
+                updateHdrConversionModeSettingsLocked();
+            }
         }
 
         mDisplayModeDirector.setDesiredDisplayModeSpecsListener(
@@ -702,6 +720,12 @@ public final class DisplayManagerService extends SystemService {
         mContext.registerReceiver(mIdleModeReceiver, filter);
     }
 
+    private boolean isDeviceConfigHdrOutputControlEnabled() {
+        return DeviceConfig.getBoolean(NAMESPACE_DISPLAY_MANAGER,
+                HDR_OUTPUT_CONTROL_FLAG,
+                true);
+    }
+
     @VisibleForTesting
     Handler getDisplayHandler() {
         return mHandler;
@@ -2117,7 +2141,7 @@ public final class DisplayManagerService extends SystemService {
 
     private HdrConversionMode getHdrConversionModeSettingInternal() {
         if (!mInjector.getHdrOutputConversionSupport()) {
-            return new HdrConversionMode(HdrConversionMode.HDR_CONVERSION_UNSUPPORTED);
+            return HDR_CONVERSION_MODE_UNSUPPORTED;
         }
         synchronized (mSyncRoot) {
             if (mHdrConversionMode != null) {
@@ -2129,7 +2153,7 @@ public final class DisplayManagerService extends SystemService {
 
     private HdrConversionMode getHdrConversionModeInternal() {
         if (!mInjector.getHdrOutputConversionSupport()) {
-            return new HdrConversionMode(HdrConversionMode.HDR_CONVERSION_UNSUPPORTED);
+            return HDR_CONVERSION_MODE_UNSUPPORTED;
         }
         HdrConversionMode mode;
         synchronized (mSyncRoot) {
@@ -3948,6 +3972,9 @@ public final class DisplayManagerService extends SystemService {
 
         @Override // Binder call
         public void setHdrConversionMode(HdrConversionMode hdrConversionMode) {
+            if (!mIsHdrOutputControlEnabled) {
+                return;
+            }
             mContext.enforceCallingOrSelfPermission(
                     Manifest.permission.MODIFY_HDR_CONVERSION_MODE,
                     "Permission required to set the HDR conversion mode.");
@@ -3961,6 +3988,9 @@ public final class DisplayManagerService extends SystemService {
 
         @Override // Binder call
         public HdrConversionMode getHdrConversionModeSetting() {
+            if (!mIsHdrOutputControlEnabled) {
+                return HDR_CONVERSION_MODE_UNSUPPORTED;
+            }
             final long token = Binder.clearCallingIdentity();
             try {
                 return getHdrConversionModeSettingInternal();
@@ -3971,6 +4001,9 @@ public final class DisplayManagerService extends SystemService {
 
         @Override // Binder call
         public HdrConversionMode getHdrConversionMode() {
+            if (!mIsHdrOutputControlEnabled) {
+                return HDR_CONVERSION_MODE_UNSUPPORTED;
+            }
             final long token = Binder.clearCallingIdentity();
             try {
                 return getHdrConversionModeInternal();
@@ -3982,6 +4015,9 @@ public final class DisplayManagerService extends SystemService {
         @Display.HdrCapabilities.HdrType
         @Override // Binder call
         public int[] getSupportedHdrOutputTypes() {
+            if (!mIsHdrOutputControlEnabled) {
+                return EMPTY_ARRAY;
+            }
             final long token = Binder.clearCallingIdentity();
             try {
                 return getSupportedHdrOutputTypesInternal();