PowerManagerService: call surfaceflinger blank and unblank through binder

Synchronize with SurfaceFlinger during screen off and on to ensure that
a black frame has been drawn on the display, and then trigger all early
suspend handlers on devices that have early suspend, as well as PowerHAL
operations.

Change-Id: I8a5ad5a84c9e80ce5bb8f7f0b09b064e2b9ad4ef

1 files changed, 3 insertions, 0 deletions

diff --git a/services/jni/com_android_server_PowerManagerService.cpp b/services/jni/com_android_server_PowerManagerService.cpp
index 0904bdd..2b8715c 100644
--- a/services/jni/com_android_server_PowerManagerService.cpp
+++ b/services/jni/com_android_server_PowerManagerService.cpp
@@ -177,12 +177,15 @@ static void nativeReleaseWakeLock(JNIEnv *env, jobject clazz, jstring idObj) {
 }
 
 static int nativeSetScreenState(JNIEnv *env, jobject clazz, jboolean on) {
+    sp<ISurfaceComposer> s(ComposerService::getComposerService());
     if (on) {
         autosuspend_disable();
         if (gPowerModule) {
             gPowerModule->setInteractive(gPowerModule, true);
         }
+        s->unblank();
     } else {
+        s->blank();
         if (gPowerModule) {
             gPowerModule->setInteractive(gPowerModule, false);
         }