diff --git a/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp b/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp
index 22d9d10..43176a3 100644
--- a/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp
+++ b/services/surfaceflinger/FrameTimeline/FrameTimeline.cpp
@@ -285,7 +285,9 @@
     dumpTable(result, mPredictions, mActuals, indent, mPredictionState, baseTime);
 }
 
-FrameTimeline::FrameTimeline() : mCurrentDisplayFrame(std::make_shared<DisplayFrame>()) {}
+FrameTimeline::FrameTimeline()
+      : mCurrentDisplayFrame(std::make_shared<DisplayFrame>()),
+        mMaxDisplayFrames(kDefaultMaxDisplayFrames) {}
 
 FrameTimeline::DisplayFrame::DisplayFrame()
       : surfaceFlingerPredictions(TimelineItem()),
@@ -438,7 +440,7 @@
 }
 
 void FrameTimeline::finalizeCurrentDisplayFrame() {
-    while (mDisplayFrames.size() >= kMaxDisplayFrames) {
+    while (mDisplayFrames.size() >= mMaxDisplayFrames) {
         // We maintain only a fixed number of frames' data. Pop older frames
         mDisplayFrames.pop_front();
     }
@@ -530,4 +532,17 @@
     }
 }
 
+void FrameTimeline::setMaxDisplayFrames(uint32_t size) {
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    // The size can either increase or decrease, clear everything, to be consistent
+    mDisplayFrames.clear();
+    mPendingPresentFences.clear();
+    mMaxDisplayFrames = size;
+}
+
+void FrameTimeline::reset() {
+    setMaxDisplayFrames(kDefaultMaxDisplayFrames);
+}
+
 } // namespace android::frametimeline::impl
diff --git a/services/surfaceflinger/FrameTimeline/FrameTimeline.h b/services/surfaceflinger/FrameTimeline/FrameTimeline.h
index 1624c2b..7da0757 100644
--- a/services/surfaceflinger/FrameTimeline/FrameTimeline.h
+++ b/services/surfaceflinger/FrameTimeline/FrameTimeline.h
@@ -163,6 +163,12 @@
     //         or contain janky Surface Frames.
     // -all : Dumps the entire list of DisplayFrames and the SurfaceFrames contained within
     virtual void parseArgs(const Vector<String16>& args, std::string& result) = 0;
+
+    // Sets the max number of display frames that can be stored. Called by SF backdoor.
+    virtual void setMaxDisplayFrames(uint32_t size);
+
+    // Restores the max number of display frames to default. Called by SF backdoor.
+    virtual void reset() = 0;
 };
 
 namespace impl {
@@ -240,6 +246,8 @@
     void setSfPresent(nsecs_t sfPresentTime,
                       const std::shared_ptr<FenceTime>& presentFence) override;
     void parseArgs(const Vector<String16>& args, std::string& result) override;
+    void setMaxDisplayFrames(uint32_t size) override;
+    void reset() override;
 
 private:
     // Friend class for testing
@@ -284,7 +292,8 @@
     std::shared_ptr<DisplayFrame> mCurrentDisplayFrame GUARDED_BY(mMutex);
     TokenManager mTokenManager;
     std::mutex mMutex;
-    static constexpr uint32_t kMaxDisplayFrames = 64;
+    uint32_t mMaxDisplayFrames;
+    static constexpr uint32_t kDefaultMaxDisplayFrames = 64;
     // The initial container size for the vector<SurfaceFrames> inside display frame. Although this
     // number doesn't represent any bounds on the number of surface frames that can go in a display
     // frame, this is a good starting size for the vector so that we can avoid the internal vector