SF: Fix synthetic VSYNC after first powering on

After onActiveDisplayChangedLocked, isActiveDisplay was stale, so the
first powering on of a newly active display did not enable and resync
to hardware VSYNC, i.e. EventThread stayed in SyntheticVsync.

Also, merge EventThread APIs to enable/disable synthetic VSYNC.

Fixes: 264700488
Bug: 255635821
Test: dumpsys SurfaceFlinger --events
Change-Id: Ibd4099bb856adc11d887f3b7b9432fbc4cb2e33d
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index 4b15385..422fa1c 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -122,12 +122,6 @@
     EXPECT_CALL(*mEventThread, onHotplugReceived(_, _)).Times(0);
     mScheduler->onHotplugReceived(handle, kDisplayId1, false);
 
-    EXPECT_CALL(*mEventThread, onScreenAcquired()).Times(0);
-    mScheduler->onScreenAcquired(handle);
-
-    EXPECT_CALL(*mEventThread, onScreenReleased()).Times(0);
-    mScheduler->onScreenReleased(handle);
-
     std::string output;
     EXPECT_CALL(*mEventThread, dump(_)).Times(0);
     mScheduler->dump(handle, output);
@@ -147,12 +141,6 @@
     EXPECT_CALL(*mEventThread, onHotplugReceived(kDisplayId1, false)).Times(1);
     mScheduler->onHotplugReceived(mConnectionHandle, kDisplayId1, false);
 
-    EXPECT_CALL(*mEventThread, onScreenAcquired()).Times(1);
-    mScheduler->onScreenAcquired(mConnectionHandle);
-
-    EXPECT_CALL(*mEventThread, onScreenReleased()).Times(1);
-    mScheduler->onScreenReleased(mConnectionHandle);
-
     std::string output("dump");
     EXPECT_CALL(*mEventThread, dump(output)).Times(1);
     mScheduler->dump(mConnectionHandle, output);
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
index e5f7e65..17b4714 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
@@ -59,47 +59,34 @@
 };
 
 struct EventThreadBaseSupportedVariant {
-    static void setupVsyncAndEventThreadNoCallExpectations(DisplayTransactionTest* test) {
-        // The callback should not be notified to toggle VSYNC.
+    static void setupVsyncNoCallExpectations(DisplayTransactionTest* test) {
+        // Expect no change to hardware nor synthetic VSYNC.
         EXPECT_CALL(test->mFlinger.mockSchedulerCallback(), setVsyncEnabled(_)).Times(0);
-
-        // The event thread should not be notified.
-        EXPECT_CALL(*test->mEventThread, onScreenReleased()).Times(0);
-        EXPECT_CALL(*test->mEventThread, onScreenAcquired()).Times(0);
+        EXPECT_CALL(*test->mEventThread, enableSyntheticVsync(_)).Times(0);
     }
 };
 
 struct EventThreadNotSupportedVariant : public EventThreadBaseSupportedVariant {
-    static void setupAcquireAndEnableVsyncCallExpectations(DisplayTransactionTest* test) {
-        // These calls are only expected for the primary display.
-
-        // Instead expect no calls.
-        setupVsyncAndEventThreadNoCallExpectations(test);
+    static void setupEnableVsyncCallExpectations(DisplayTransactionTest* test) {
+        setupVsyncNoCallExpectations(test);
     }
 
-    static void setupReleaseAndDisableVsyncCallExpectations(DisplayTransactionTest* test) {
-        // These calls are only expected for the primary display.
-
-        // Instead expect no calls.
-        setupVsyncAndEventThreadNoCallExpectations(test);
+    static void setupDisableVsyncCallExpectations(DisplayTransactionTest* test) {
+        setupVsyncNoCallExpectations(test);
     }
 };
 
 struct EventThreadIsSupportedVariant : public EventThreadBaseSupportedVariant {
-    static void setupAcquireAndEnableVsyncCallExpectations(DisplayTransactionTest* test) {
-        // The callback should be notified to enable VSYNC.
+    static void setupEnableVsyncCallExpectations(DisplayTransactionTest* test) {
+        // Expect to enable hardware VSYNC and disable synthetic VSYNC.
         EXPECT_CALL(test->mFlinger.mockSchedulerCallback(), setVsyncEnabled(true)).Times(1);
-
-        // The event thread should be notified that the screen was acquired.
-        EXPECT_CALL(*test->mEventThread, onScreenAcquired()).Times(1);
+        EXPECT_CALL(*test->mEventThread, enableSyntheticVsync(false)).Times(1);
     }
 
-    static void setupReleaseAndDisableVsyncCallExpectations(DisplayTransactionTest* test) {
-        // The callback should be notified to disable VSYNC.
+    static void setupDisableVsyncCallExpectations(DisplayTransactionTest* test) {
+        // Expect to disable hardware VSYNC and enable synthetic VSYNC.
         EXPECT_CALL(test->mFlinger.mockSchedulerCallback(), setVsyncEnabled(false)).Times(1);
-
-        // The event thread should not be notified that the screen was released.
-        EXPECT_CALL(*test->mEventThread, onScreenReleased()).Times(1);
+        EXPECT_CALL(*test->mEventThread, enableSyntheticVsync(true)).Times(1);
     }
 };
 
@@ -133,7 +120,7 @@
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::setupComposerCallExpectations(test, IComposerClient::PowerMode::ON);
-        Case::EventThread::setupAcquireAndEnableVsyncCallExpectations(test);
+        Case::EventThread::setupEnableVsyncCallExpectations(test);
         Case::DispSync::setupResetModelCallExpectations(test);
         Case::setupRepaintEverythingCallExpectations(test);
     }
@@ -148,7 +135,7 @@
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
         Case::setupComposerCallExpectations(test, Case::Doze::ACTUAL_POWER_MODE_FOR_DOZE_SUSPEND);
-        Case::EventThread::setupVsyncAndEventThreadNoCallExpectations(test);
+        Case::EventThread::setupVsyncNoCallExpectations(test);
         Case::setupRepaintEverythingCallExpectations(test);
     }
 
@@ -160,7 +147,7 @@
 struct TransitionOnToOffVariant : public TransitionVariantCommon<PowerMode::ON, PowerMode::OFF> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupReleaseAndDisableVsyncCallExpectations(test);
+        Case::EventThread::setupDisableVsyncCallExpectations(test);
         Case::setupComposerCallExpectations(test, IComposerClient::PowerMode::OFF);
     }
 
@@ -173,7 +160,7 @@
       : public TransitionVariantCommon<PowerMode::DOZE_SUSPEND, PowerMode::OFF> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupVsyncAndEventThreadNoCallExpectations(test);
+        Case::EventThread::setupVsyncNoCallExpectations(test);
         Case::setupComposerCallExpectations(test, IComposerClient::PowerMode::OFF);
     }
 
@@ -185,7 +172,7 @@
 struct TransitionOnToDozeVariant : public TransitionVariantCommon<PowerMode::ON, PowerMode::DOZE> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupVsyncAndEventThreadNoCallExpectations(test);
+        Case::EventThread::setupVsyncNoCallExpectations(test);
         Case::setupComposerCallExpectations(test, Case::Doze::ACTUAL_POWER_MODE_FOR_DOZE);
     }
 };
@@ -194,7 +181,7 @@
       : public TransitionVariantCommon<PowerMode::DOZE_SUSPEND, PowerMode::DOZE> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupAcquireAndEnableVsyncCallExpectations(test);
+        Case::EventThread::setupEnableVsyncCallExpectations(test);
         Case::DispSync::setupResetModelCallExpectations(test);
         Case::setupComposerCallExpectations(test, Case::Doze::ACTUAL_POWER_MODE_FOR_DOZE);
     }
@@ -203,7 +190,7 @@
 struct TransitionDozeToOnVariant : public TransitionVariantCommon<PowerMode::DOZE, PowerMode::ON> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupVsyncAndEventThreadNoCallExpectations(test);
+        Case::EventThread::setupVsyncNoCallExpectations(test);
         Case::setupComposerCallExpectations(test, IComposerClient::PowerMode::ON);
     }
 };
@@ -212,7 +199,7 @@
       : public TransitionVariantCommon<PowerMode::DOZE_SUSPEND, PowerMode::ON> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupAcquireAndEnableVsyncCallExpectations(test);
+        Case::EventThread::setupEnableVsyncCallExpectations(test);
         Case::DispSync::setupResetModelCallExpectations(test);
         Case::setupComposerCallExpectations(test, IComposerClient::PowerMode::ON);
     }
@@ -222,7 +209,7 @@
       : public TransitionVariantCommon<PowerMode::ON, PowerMode::DOZE_SUSPEND> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupReleaseAndDisableVsyncCallExpectations(test);
+        Case::EventThread::setupDisableVsyncCallExpectations(test);
         Case::setupComposerCallExpectations(test, Case::Doze::ACTUAL_POWER_MODE_FOR_DOZE_SUSPEND);
     }
 };
@@ -231,7 +218,7 @@
       : public TransitionVariantCommon<PowerMode::ON, static_cast<PowerMode>(POWER_MODE_LEET)> {
     template <typename Case>
     static void setupCallExpectations(DisplayTransactionTest* test) {
-        Case::EventThread::setupVsyncAndEventThreadNoCallExpectations(test);
+        Case::EventThread::setupVsyncNoCallExpectations(test);
         Case::setupNoComposerPowerModeCallExpectations(test);
     }
 };
diff --git a/services/surfaceflinger/tests/unittests/TestableScheduler.h b/services/surfaceflinger/tests/unittests/TestableScheduler.h
index bd3f3ca..48c5d48 100644
--- a/services/surfaceflinger/tests/unittests/TestableScheduler.h
+++ b/services/surfaceflinger/tests/unittests/TestableScheduler.h
@@ -91,6 +91,7 @@
         Scheduler::setLeaderDisplay(displayId);
     }
 
+    auto& mutableAppConnectionHandle() { return mAppConnectionHandle; }
     auto& mutableVsyncModulator() { return *mVsyncModulator; }
     auto& mutableLayerHistory() { return mLayerHistory; }
 
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index 8703359..4488038 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -252,7 +252,10 @@
 
         mScheduler->initVsync(mScheduler->getVsyncSchedule().getDispatch(), *mTokenManager, 0ms);
 
-        mFlinger->mAppConnectionHandle = mScheduler->createConnection(std::move(appEventThread));
+        mScheduler->mutableAppConnectionHandle() =
+                mScheduler->createConnection(std::move(appEventThread));
+
+        mFlinger->mAppConnectionHandle = mScheduler->mutableAppConnectionHandle();
         mFlinger->mSfConnectionHandle = mScheduler->createConnection(std::move(sfEventThread));
         resetScheduler(mScheduler);
     }
diff --git a/services/surfaceflinger/tests/unittests/mock/MockEventThread.h b/services/surfaceflinger/tests/unittests/mock/MockEventThread.h
index f8567bd..8026a7a 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockEventThread.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockEventThread.h
@@ -31,8 +31,7 @@
 
     MOCK_CONST_METHOD2(createEventConnection,
                        sp<EventThreadConnection>(ResyncCallback, EventRegistrationFlags));
-    MOCK_METHOD0(onScreenReleased, void());
-    MOCK_METHOD0(onScreenAcquired, void());
+    MOCK_METHOD(void, enableSyntheticVsync, (bool), (override));
     MOCK_METHOD2(onHotplugReceived, void(PhysicalDisplayId, bool));
     MOCK_METHOD1(onModeChanged, void(const scheduler::FrameRateMode &));
     MOCK_METHOD2(onFrameRateOverridesChanged,