Plumbing through GPU context priority

If the SF's RE priority is set to REALTIME, then SysUI set's it's
ThreadedRendererCompat priority to EGL_CONTEXT_PRIORITY_HIGH_IMG.

Test: Compile and observe logcat.
Bug: 168740533
Change-Id: Ib2fdac90c22b357d8b9f5c80c03a3d9c4e1a515d

core/java/android/view/SurfaceControl.java

@@ -232,6 +232,7 @@ public final class SurfaceControl implements Parcelable {
             long nativeSurfaceControl);
     private static native void nativeRemoveJankDataListener(long nativeListener);
     private static native long nativeCreateJankDataListenerWrapper(OnJankDataListener listener);
+    private static native int nativeGetGPUContextPriority();
 
     @Nullable
     @GuardedBy("mLock")
@@ -2438,7 +2439,15 @@ public final class SurfaceControl implements Parcelable {
         nativeRemoveJankDataListener(listener.mNativePtr.get());
     }
 
-     /**
+    /**
+     * Return GPU Context priority that is set in SurfaceFlinger's Render Engine.
+     * @hide
+     */
+    public static int getGPUContextPriority() {
+        return nativeGetGPUContextPriority();
+    }
+
+    /**
      * An atomic set of changes to a set of SurfaceControl.
      */
     public static class Transaction implements Closeable, Parcelable {

core/jni/android_view_SurfaceControl.cpp

@@ -1679,6 +1679,10 @@ static jlong nativeCreateJankDataListenerWrapper(JNIEnv* env, jclass clazz,
     return reinterpret_cast<jlong>(new JankDataListenerWrapper(env, jankDataListenerObject));
 }
 
+static jint nativeGetGPUContextPriority(JNIEnv* env, jclass clazz) {
+    return static_cast<jint>(SurfaceComposerClient::getGPUContextPriority());
+}
+
 // ----------------------------------------------------------------------------
 
 static const JNINativeMethod sSurfaceControlMethods[] = {
@@ -1869,6 +1873,8 @@ static const JNINativeMethod sSurfaceControlMethods[] = {
             (void*)nativeRemoveJankDataListener },
     {"nativeCreateJankDataListenerWrapper", "(Landroid/view/SurfaceControl$OnJankDataListener;)J",
             (void*)nativeCreateJankDataListenerWrapper },
+    {"nativeGetGPUContextPriority", "()I",
+            (void*)nativeGetGPUContextPriority },
         // clang-format on
 };
 

packages/SystemUI/shared/src/com/android/systemui/shared/system/ThreadedRendererCompat.java

@@ -23,6 +23,7 @@ import android.view.ThreadedRenderer;
  */
 public class ThreadedRendererCompat {
 
+    public static int EGL_CONTEXT_PRIORITY_REALTIME_NV = 0x3357;
     public static int EGL_CONTEXT_PRIORITY_HIGH_IMG = 0x3101;
     public static int EGL_CONTEXT_PRIORITY_MEDIUM_IMG = 0x3102;
     public static int EGL_CONTEXT_PRIORITY_LOW_IMG = 0x3103;

packages/SystemUI/src/com/android/systemui/SystemUIApplication.java

@@ -33,6 +33,7 @@ import android.os.UserHandle;
 import android.provider.Settings;
 import android.util.Log;
 import android.util.TimingsTraceLog;
+import android.view.SurfaceControl;
 
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.systemui.dagger.ContextComponentHelper;
@@ -41,6 +42,7 @@ import com.android.systemui.dagger.SysUIComponent;
 import com.android.systemui.dump.DumpManager;
 import com.android.systemui.people.PeopleSpaceActivity;
 import com.android.systemui.people.widget.PeopleSpaceWidgetProvider;
+import com.android.systemui.shared.system.ThreadedRendererCompat;
 import com.android.systemui.util.NotificationChannels;
 
 import java.lang.reflect.Constructor;
@@ -98,6 +100,18 @@ public class SystemUIApplication extends Application implements
         if (Process.myUserHandle().equals(UserHandle.SYSTEM)) {
             IntentFilter bootCompletedFilter = new IntentFilter(Intent.ACTION_BOOT_COMPLETED);
             bootCompletedFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
+
+            // If SF GPU context priority is set to realtime, then SysUI should run at high.
+            // The priority is defaulted at medium.
+            int sfPriority = SurfaceControl.getGPUContextPriority();
+            Log.i(TAG, "Found SurfaceFlinger's GPU Priority: " + sfPriority);
+            if (sfPriority == ThreadedRendererCompat.EGL_CONTEXT_PRIORITY_REALTIME_NV) {
+                Log.i(TAG, "Setting SysUI's GPU Context priority to: "
+                        + ThreadedRendererCompat.EGL_CONTEXT_PRIORITY_HIGH_IMG);
+                ThreadedRendererCompat.setContextPriority(
+                        ThreadedRendererCompat.EGL_CONTEXT_PRIORITY_HIGH_IMG);
+            }
+
             registerReceiver(new BroadcastReceiver() {
                 @Override
                 public void onReceive(Context context, Intent intent) {