Add method to get current vsync from sf directly.

Bug: 205721584
Test: atest libsurfaceflinger_unittest
Test: atest DisplayEventReceiverTest
Change-Id: I38d4bd20bc2f2ad7ff964c3d613c28919478c0fc

1 files changed, 15 insertions, 0 deletions

diff --git a/libs/gui/DisplayEventReceiver.cpp b/libs/gui/DisplayEventReceiver.cpp
index b916e48f79..36e7d80d5e 100644
--- a/libs/gui/DisplayEventReceiver.cpp
+++ b/libs/gui/DisplayEventReceiver.cpp
@@ -20,6 +20,7 @@
 
 #include <gui/DisplayEventReceiver.h>
 #include <gui/ISurfaceComposer.h>
+#include <gui/VsyncEventData.h>
 
 #include <private/gui/ComposerService.h>
 
@@ -79,6 +80,20 @@ status_t DisplayEventReceiver::requestNextVsync() {
     return NO_INIT;
 }
 
+status_t DisplayEventReceiver::getLatestVsyncEventData(VsyncEventData* outVsyncEventData) const {
+    if (mEventConnection != nullptr) {
+        VsyncEventData vsyncEventData;
+        auto status = mEventConnection->getLatestVsyncEventData(&vsyncEventData);
+        if (!status.isOk()) {
+            ALOGE("Failed to get latest vsync event data: %s", status.exceptionMessage().c_str());
+            return status.transactionError();
+        }
+        *outVsyncEventData = vsyncEventData;
+        return NO_ERROR;
+    }
+    return NO_INIT;
+}
+
 ssize_t DisplayEventReceiver::getEvents(DisplayEventReceiver::Event* events,
         size_t count) {
     return DisplayEventReceiver::getEvents(mDataChannel.get(), events, count);