2 files changed, 11 insertions, 2 deletions
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 20a6d30c1c..57f729bf0b 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2166,7 +2166,7 @@ void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
     // with mStateLock held to guarantee that mCurrentState won't change
     // until the transaction is committed.
 
-    mVsyncModulator.setTransactionStart(VSyncModulator::TransactionStart::NORMAL);
+    mVsyncModulator.onTransactionHandled();
     transactionFlags = getTransactionFlags(eTransactionMask);
     handleTransactionLocked(transactionFlags);
 
diff --git a/services/surfaceflinger/VSyncModulator.h b/services/surfaceflinger/VSyncModulator.h
index 3126debed4..3e5800e2a2 100644
--- a/services/surfaceflinger/VSyncModulator.h
+++ b/services/surfaceflinger/VSyncModulator.h
@@ -55,11 +55,20 @@ public:
     }
 
     void setTransactionStart(TransactionStart transactionStart) {
-        if (transactionStart == mTransactionStart) return;
+        // An early transaction stays an early transaction.
+        if (transactionStart == mTransactionStart || mTransactionStart == TransactionStart::EARLY) {
+            return;
+        }
         mTransactionStart = transactionStart;
         updatePhaseOffsets();
     }
 
+    void onTransactionHandled() {
+        if (mTransactionStart == TransactionStart::NORMAL) return;
+        mTransactionStart = TransactionStart::NORMAL;
+        updatePhaseOffsets();
+    }
+
     void setLastFrameUsedRenderEngine(bool re) {
         if (re == mLastFrameUsedRenderEngine) return;
         mLastFrameUsedRenderEngine = re;