diff --git a/services/surfaceflinger/CompositionEngine/tests/MockPowerAdvisor.h b/services/surfaceflinger/CompositionEngine/tests/MockPowerAdvisor.h
index 8c164ed..c8bd5e4 100644
--- a/services/surfaceflinger/CompositionEngine/tests/MockPowerAdvisor.h
+++ b/services/surfaceflinger/CompositionEngine/tests/MockPowerAdvisor.h
@@ -55,7 +55,8 @@
     MOCK_METHOD(void, setRequiresClientComposition,
                 (DisplayId displayId, bool requiresClientComposition), (override));
     MOCK_METHOD(void, setExpectedPresentTime, (nsecs_t expectedPresentTime), (override));
-    MOCK_METHOD(void, setPresentFenceTime, (nsecs_t presentFenceTime), (override));
+    MOCK_METHOD(void, setSfPresentTiming, (nsecs_t presentFenceTime, nsecs_t presentEndTime),
+                (override));
     MOCK_METHOD(void, setHwcPresentDelayedTime,
                 (DisplayId displayId,
                  std::chrono::steady_clock::time_point earliestFrameStartTime));
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp b/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
index 62078ba..25f624c 100644
--- a/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
@@ -315,7 +315,8 @@
     mExpectedPresentTimes.append(expectedPresentTime);
 }
 
-void PowerAdvisor::setPresentFenceTime(nsecs_t presentFenceTime) {
+void PowerAdvisor::setSfPresentTiming(nsecs_t presentFenceTime, nsecs_t presentEndTime) {
+    mLastSfPresentEndTime = presentEndTime;
     mLastPresentFenceTime = presentFenceTime;
 }
 
@@ -334,13 +335,7 @@
 }
 
 void PowerAdvisor::setCompositeEnd(nsecs_t compositeEnd) {
-    mLastCompositeEndTime = compositeEnd;
-    // calculate the postcomp time here as well
-    std::vector<DisplayId>&& displays = getOrderedDisplayIds(&DisplayTimingData::hwcPresentEndTime);
-    DisplayTimingData& timingData = mDisplayTimingData[displays.back()];
-    mLastPostcompDuration = compositeEnd -
-            (timingData.skippedValidate ? *timingData.hwcValidateEndTime
-                                        : *timingData.hwcPresentEndTime);
+    mLastPostcompDuration = compositeEnd - mLastSfPresentEndTime;
 }
 
 void PowerAdvisor::setDisplays(std::vector<DisplayId>& displayIds) {
@@ -399,7 +394,7 @@
             getOrderedDisplayIds(&DisplayTimingData::hwcPresentStartTime);
     DisplayTimeline referenceTiming, estimatedTiming;
 
-    // Iterate over the displays in the same order they are presented
+    // Iterate over the displays that use hwc in the same order they are presented
     for (DisplayId displayId : displayIds) {
         if (mDisplayTimingData.count(displayId) == 0) {
             continue;
@@ -451,8 +446,11 @@
     }
     ATRACE_INT64("Idle duration", idleDuration);
 
+    nsecs_t estimatedFlingerEndTime = earlyHint ? estimatedEndTime : mLastSfPresentEndTime;
+
     // Don't count time spent idly waiting in the estimate as we could do more work in that time
     estimatedEndTime -= idleDuration;
+    estimatedFlingerEndTime -= idleDuration;
 
     // We finish the frame when both present and the gpu are done, so wait for the later of the two
     // Also add the frame delay duration since the target did not move while we were delayed
@@ -460,7 +458,10 @@
             std::max(estimatedEndTime, estimatedGpuEndTime.value_or(0)) - mCommitStartTimes[0];
 
     // We finish SurfaceFlinger when post-composition finishes, so add that in here
-    nsecs_t flingerDuration = estimatedEndTime + mLastPostcompDuration - mCommitStartTimes[0];
+    nsecs_t flingerDuration =
+            estimatedFlingerEndTime + mLastPostcompDuration - mCommitStartTimes[0];
+
+    // Combine the two timings into a single normalized one
     nsecs_t combinedDuration = combineTimingEstimates(totalDuration, flingerDuration);
 
     return std::make_optional(combinedDuration);
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
index a93744f..859cf3d 100644
--- a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
@@ -72,8 +72,8 @@
                                      nsecs_t presentEndTime) = 0;
     // Reports the expected time that the current frame will present to the display
     virtual void setExpectedPresentTime(nsecs_t expectedPresentTime) = 0;
-    // Reports the most recent present fence time once it's known at the end of the frame
-    virtual void setPresentFenceTime(nsecs_t presentFenceTime) = 0;
+    // Reports the most recent present fence time and end time once known
+    virtual void setSfPresentTiming(nsecs_t presentFenceTime, nsecs_t presentEndTime) = 0;
     // Reports whether a display used client composition this frame
     virtual void setRequiresClientComposition(DisplayId displayId,
                                               bool requiresClientComposition) = 0;
@@ -142,7 +142,7 @@
     void setSkippedValidate(DisplayId displayId, bool skipped) override;
     void setRequiresClientComposition(DisplayId displayId, bool requiresClientComposition) override;
     void setExpectedPresentTime(nsecs_t expectedPresentTime) override;
-    void setPresentFenceTime(nsecs_t presentFenceTime) override;
+    void setSfPresentTiming(nsecs_t presentFenceTime, nsecs_t presentEndTime) override;
     void setHwcPresentDelayedTime(
             DisplayId displayId,
             std::chrono::steady_clock::time_point earliestFrameStartTime) override;
@@ -245,8 +245,6 @@
 
     // Current frame's delay
     nsecs_t mFrameDelayDuration = 0;
-    // Last frame's composite end time
-    nsecs_t mLastCompositeEndTime = -1;
     // Last frame's post-composition duration
     nsecs_t mLastPostcompDuration = 0;
     // Buffer of recent commit start times
@@ -255,6 +253,8 @@
     RingBuffer<nsecs_t, 2> mExpectedPresentTimes;
     // Most recent present fence time, set at the end of the frame once known
     nsecs_t mLastPresentFenceTime = -1;
+    // Most recent present fence time, set at the end of the frame once known
+    nsecs_t mLastSfPresentEndTime = -1;
     // Target for the entire pipeline including gpu
     std::optional<nsecs_t> mTotalFrameTargetDuration;
     // Updated list of display IDs
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index de12d62..499eb4c 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2235,7 +2235,8 @@
 
     // Send a power hint hint after presentation is finished
     if (mPowerHintSessionEnabled) {
-        mPowerAdvisor->setPresentFenceTime(mPreviousPresentFences[0].fenceTime->getSignalTime());
+        mPowerAdvisor->setSfPresentTiming(mPreviousPresentFences[0].fenceTime->getSignalTime(),
+                                          systemTime());
         if (mPowerHintSessionMode.late) {
             mPowerAdvisor->sendActualWorkDuration();
         }
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h
index d6dca45..aede250 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h
@@ -53,7 +53,8 @@
     MOCK_METHOD(void, setRequiresClientComposition,
                 (DisplayId displayId, bool requiresClientComposition), (override));
     MOCK_METHOD(void, setExpectedPresentTime, (nsecs_t expectedPresentTime), (override));
-    MOCK_METHOD(void, setPresentFenceTime, (nsecs_t presentFenceTime), (override));
+    MOCK_METHOD(void, setSfPresentTiming, (nsecs_t presentFenceTime, nsecs_t presentEndTime),
+                (override));
     MOCK_METHOD(void, setHwcPresentDelayedTime,
                 (DisplayId displayId,
                  std::chrono::steady_clock::time_point earliestFrameStartTime));