diff --git a/services/surfaceflinger/Scheduler/Android.bp b/services/surfaceflinger/Scheduler/Android.bp
index 6d2586a..db247aa 100644
--- a/services/surfaceflinger/Scheduler/Android.bp
+++ b/services/surfaceflinger/Scheduler/Android.bp
@@ -21,6 +21,7 @@
         "libui",
         "libutils",
     ],
+    static_libs: ["libsurfaceflinger_common"],
 }
 
 cc_library_headers {
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index b54f334..29b1d62 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -118,7 +118,7 @@
 
 void Scheduler::registerDisplay(PhysicalDisplayId displayId, RefreshRateSelectorPtr selectorPtr) {
     auto schedulePtr = std::make_shared<VsyncSchedule>(
-            displayId, mFeatures,
+            selectorPtr->getActiveMode().modePtr, mFeatures,
             [this](PhysicalDisplayId id, bool enable) { onHardwareVsyncRequest(id, enable); },
             mVsyncTrackerCallback);
 
@@ -503,7 +503,7 @@
 }
 
 void Scheduler::resyncToHardwareVsyncLocked(PhysicalDisplayId id, bool allowToEnable,
-                                            std::optional<Fps> refreshRate) {
+                                            DisplayModePtr modePtr) {
     const auto displayOpt = mDisplays.get(id);
     if (!displayOpt) {
         ALOGW("%s: Invalid display %s!", __func__, to_string(id).c_str());
@@ -512,12 +512,12 @@
     const Display& display = *displayOpt;
 
     if (display.schedulePtr->isHardwareVsyncAllowed(allowToEnable)) {
-        if (!refreshRate) {
-            refreshRate = display.selectorPtr->getActiveMode().modePtr->getVsyncRate();
+        if (!modePtr) {
+            modePtr = display.selectorPtr->getActiveMode().modePtr.get();
         }
-        if (refreshRate->isValid()) {
+        if (modePtr->getVsyncRate().isValid()) {
             constexpr bool kForce = false;
-            display.schedulePtr->startPeriodTransition(refreshRate->getPeriod(), kForce);
+            display.schedulePtr->onDisplayModeChanged(ftl::as_non_null(modePtr), kForce);
         }
     }
 }
@@ -563,19 +563,7 @@
     ALOGV("%s %s (%s)", __func__, to_string(mode.fps).c_str(),
           to_string(mode.modePtr->getVsyncRate()).c_str());
 
-    display.schedulePtr->getTracker().setDisplayModeData(
-            {.renderRate = renderFrameRate,
-             .notifyExpectedPresentTimeoutOpt = getNotifyExpectedPresentTimeout(mode)});
-}
-
-std::optional<Period> Scheduler::getNotifyExpectedPresentTimeout(const FrameRateMode& mode) {
-    if (mode.modePtr->getVrrConfig() && mode.modePtr->getVrrConfig()->notifyExpectedPresentConfig) {
-        return Period::fromNs(
-                mode.modePtr->getVrrConfig()
-                        ->notifyExpectedPresentConfig->notifyExpectedPresentTimeoutNs);
-    } else {
-        return std::nullopt;
-    }
+    display.schedulePtr->getTracker().setRenderRate(renderFrameRate);
 }
 
 void Scheduler::resync() {
@@ -913,9 +901,9 @@
 
         newVsyncSchedulePtr = pacesetter.schedulePtr;
 
-        const Fps refreshRate = pacesetter.selectorPtr->getActiveMode().modePtr->getVsyncRate();
         constexpr bool kForce = true;
-        newVsyncSchedulePtr->startPeriodTransition(refreshRate.getPeriod(), kForce);
+        newVsyncSchedulePtr->onDisplayModeChanged(pacesetter.selectorPtr->getActiveMode().modePtr,
+                                                  kForce);
     }
     return newVsyncSchedulePtr;
 }
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index c78051a..0615b31 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -210,13 +210,12 @@
     // If allowToEnable is true, then hardware vsync will be turned on.
     // Otherwise, if hardware vsync is not already enabled then this method will
     // no-op.
-    // If refreshRate is nullopt, use the existing refresh rate of the display.
+    // If modePtr is nullopt, use the active display mode.
     void resyncToHardwareVsync(PhysicalDisplayId id, bool allowToEnable,
-                               std::optional<Fps> refreshRate = std::nullopt)
-            EXCLUDES(mDisplayLock) {
+                               DisplayModePtr modePtr = nullptr) EXCLUDES(mDisplayLock) {
         std::scoped_lock lock(mDisplayLock);
         ftl::FakeGuard guard(kMainThreadContext);
-        resyncToHardwareVsyncLocked(id, allowToEnable, refreshRate);
+        resyncToHardwareVsyncLocked(id, allowToEnable, modePtr);
     }
     void forceNextResync() { mLastResyncTime = 0; }
 
@@ -354,7 +353,7 @@
     void onHardwareVsyncRequest(PhysicalDisplayId, bool enable);
 
     void resyncToHardwareVsyncLocked(PhysicalDisplayId, bool allowToEnable,
-                                     std::optional<Fps> refreshRate = std::nullopt)
+                                     DisplayModePtr modePtr = nullptr)
             REQUIRES(kMainThreadContext, mDisplayLock);
     void resyncAllToHardwareVsync(bool allowToEnable) EXCLUDES(mDisplayLock);
     void setVsyncConfig(const VsyncConfig&, Period vsyncPeriod);
@@ -431,9 +430,6 @@
     Period getVsyncPeriod(uid_t) override EXCLUDES(mDisplayLock);
     void resync() override EXCLUDES(mDisplayLock);
 
-    std::optional<Period> getNotifyExpectedPresentTimeout(const FrameRateMode&)
-            REQUIRES(mDisplayLock);
-
     // Stores EventThread associated with a given VSyncSource, and an initial EventThreadConnection.
     struct Connection {
         sp<EventThreadConnection> connection;
diff --git a/services/surfaceflinger/Scheduler/VSyncPredictor.cpp b/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
index f5f93ce..acb7265 100644
--- a/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
@@ -47,16 +47,16 @@
 
 VSyncPredictor::~VSyncPredictor() = default;
 
-VSyncPredictor::VSyncPredictor(PhysicalDisplayId id, nsecs_t idealPeriod, size_t historySize,
+VSyncPredictor::VSyncPredictor(ftl::NonNull<DisplayModePtr> modePtr, size_t historySize,
                                size_t minimumSamplesForPrediction, uint32_t outlierTolerancePercent,
                                IVsyncTrackerCallback& callback)
-      : mId(id),
+      : mId(modePtr->getPhysicalDisplayId()),
         mTraceOn(property_get_bool("debug.sf.vsp_trace", false)),
         kHistorySize(historySize),
         kMinimumSamplesForPrediction(minimumSamplesForPrediction),
         kOutlierTolerancePercent(std::min(outlierTolerancePercent, kMaxPercent)),
         mVsyncTrackerCallback(callback),
-        mIdealPeriod(idealPeriod) {
+        mDisplayModePtr(modePtr) {
     resetModel();
 }
 
@@ -74,13 +74,18 @@
     return (i + 1) % mTimestamps.size();
 }
 
+nsecs_t VSyncPredictor::idealPeriod() const {
+    return mDisplayModePtr->getVsyncRate().getPeriodNsecs();
+}
+
 bool VSyncPredictor::validate(nsecs_t timestamp) const {
     if (mLastTimestampIndex < 0 || mTimestamps.empty()) {
         return true;
     }
 
-    auto const aValidTimestamp = mTimestamps[mLastTimestampIndex];
-    auto const percent = (timestamp - aValidTimestamp) % mIdealPeriod * kMaxPercent / mIdealPeriod;
+    const auto aValidTimestamp = mTimestamps[mLastTimestampIndex];
+    const auto percent =
+            (timestamp - aValidTimestamp) % idealPeriod() * kMaxPercent / idealPeriod();
     if (percent >= kOutlierTolerancePercent &&
         percent <= (kMaxPercent - kOutlierTolerancePercent)) {
         return false;
@@ -90,7 +95,7 @@
                                        [timestamp](nsecs_t a, nsecs_t b) {
                                            return std::abs(timestamp - a) < std::abs(timestamp - b);
                                        });
-    const auto distancePercent = std::abs(*iter - timestamp) * kMaxPercent / mIdealPeriod;
+    const auto distancePercent = std::abs(*iter - timestamp) * kMaxPercent / idealPeriod();
     if (distancePercent < kOutlierTolerancePercent) {
         // duplicate timestamp
         return false;
@@ -100,7 +105,7 @@
 
 nsecs_t VSyncPredictor::currentPeriod() const {
     std::lock_guard lock(mMutex);
-    return mRateMap.find(mIdealPeriod)->second.slope;
+    return mRateMap.find(idealPeriod())->second.slope;
 }
 
 bool VSyncPredictor::addVsyncTimestamp(nsecs_t timestamp) {
@@ -137,7 +142,7 @@
 
     const size_t numSamples = mTimestamps.size();
     if (numSamples < kMinimumSamplesForPrediction) {
-        mRateMap[mIdealPeriod] = {mIdealPeriod, 0};
+        mRateMap[idealPeriod()] = {idealPeriod(), 0};
         return true;
     }
 
@@ -161,7 +166,7 @@
 
     // Normalizing to the oldest timestamp cuts down on error in calculating the intercept.
     const auto oldestTS = *std::min_element(mTimestamps.begin(), mTimestamps.end());
-    auto it = mRateMap.find(mIdealPeriod);
+    auto it = mRateMap.find(idealPeriod());
     auto const currentPeriod = it->second.slope;
 
     // The mean of the ordinals must be precise for the intercept calculation, so scale them up for
@@ -199,7 +204,7 @@
     }
 
     if (CC_UNLIKELY(bottom == 0)) {
-        it->second = {mIdealPeriod, 0};
+        it->second = {idealPeriod(), 0};
         clearTimestamps();
         return false;
     }
@@ -207,9 +212,9 @@
     nsecs_t const anticipatedPeriod = top * kScalingFactor / bottom;
     nsecs_t const intercept = meanTS - (anticipatedPeriod * meanOrdinal / kScalingFactor);
 
-    auto const percent = std::abs(anticipatedPeriod - mIdealPeriod) * kMaxPercent / mIdealPeriod;
+    auto const percent = std::abs(anticipatedPeriod - idealPeriod()) * kMaxPercent / idealPeriod();
     if (percent >= kOutlierTolerancePercent) {
-        it->second = {mIdealPeriod, 0};
+        it->second = {idealPeriod(), 0};
         clearTimestamps();
         return false;
     }
@@ -241,8 +246,8 @@
     if (mTimestamps.empty()) {
         traceInt64("VSP-mode", 1);
         auto const knownTimestamp = mKnownTimestamp ? *mKnownTimestamp : timePoint;
-        auto const numPeriodsOut = ((timePoint - knownTimestamp) / mIdealPeriod) + 1;
-        return knownTimestamp + numPeriodsOut * mIdealPeriod;
+        auto const numPeriodsOut = ((timePoint - knownTimestamp) / idealPeriod()) + 1;
+        return knownTimestamp + numPeriodsOut * idealPeriod();
     }
 
     auto const oldest = *std::min_element(mTimestamps.begin(), mTimestamps.end());
@@ -278,11 +283,11 @@
     mLastVsyncSequence = getVsyncSequenceLocked(timePoint);
 
     const auto renderRatePhase = [&]() REQUIRES(mMutex) -> int {
-        if (!mDisplayModeDataOpt) return 0;
+        if (!mRenderRateOpt) return 0;
 
         const auto divisor =
-                RefreshRateSelector::getFrameRateDivisor(Fps::fromPeriodNsecs(mIdealPeriod),
-                                                         mDisplayModeDataOpt->renderRate);
+                RefreshRateSelector::getFrameRateDivisor(Fps::fromPeriodNsecs(idealPeriod()),
+                                                         *mRenderRateOpt);
         if (divisor <= 1) return 0;
 
         const int mod = mLastVsyncSequence->seq % divisor;
@@ -293,12 +298,12 @@
 
     if (renderRatePhase == 0) {
         const auto vsyncTime = mLastVsyncSequence->vsyncTime;
-        if (FlagManager::getInstance().vrr_config() && mDisplayModeDataOpt) {
+        if (FlagManager::getInstance().vrr_config()) {
             const auto vsyncTimePoint = TimePoint::fromNs(vsyncTime);
             ATRACE_FORMAT("%s InPhase vsyncIn %.2fms", __func__,
                           ticks<std::milli, float>(vsyncTimePoint - TimePoint::now()));
-            mVsyncTrackerCallback.onVsyncGenerated(mId, vsyncTimePoint, *mDisplayModeDataOpt,
-                                                   Period::fromNs(mIdealPeriod));
+            const Fps renderRate = mRenderRateOpt ? *mRenderRateOpt : mDisplayModePtr->getPeakFps();
+            mVsyncTrackerCallback.onVsyncGenerated(vsyncTimePoint, mDisplayModePtr, renderRate);
         }
         return vsyncTime;
     }
@@ -307,12 +312,13 @@
     const auto approximateNextVsync = mLastVsyncSequence->vsyncTime + slope * renderRatePhase;
     const auto nextAnticipatedVsyncTime =
             nextAnticipatedVSyncTimeFromLocked(approximateNextVsync - slope / 2);
-    if (FlagManager::getInstance().vrr_config() && mDisplayModeDataOpt) {
+    if (FlagManager::getInstance().vrr_config()) {
         const auto nextAnticipatedVsyncTimePoint = TimePoint::fromNs(nextAnticipatedVsyncTime);
         ATRACE_FORMAT("%s outOfPhase vsyncIn %.2fms", __func__,
                       ticks<std::milli, float>(nextAnticipatedVsyncTimePoint - TimePoint::now()));
-        mVsyncTrackerCallback.onVsyncGenerated(mId, nextAnticipatedVsyncTimePoint,
-                                               *mDisplayModeDataOpt, Period::fromNs(mIdealPeriod));
+        const Fps renderRate = mRenderRateOpt ? *mRenderRateOpt : mDisplayModePtr->getPeakFps();
+        mVsyncTrackerCallback.onVsyncGenerated(nextAnticipatedVsyncTimePoint, mDisplayModePtr,
+                                               renderRate);
     }
     return nextAnticipatedVsyncTime;
 }
@@ -328,7 +334,8 @@
 bool VSyncPredictor::isVSyncInPhase(nsecs_t timePoint, Fps frameRate) const {
     std::lock_guard lock(mMutex);
     const auto divisor =
-            RefreshRateSelector::getFrameRateDivisor(Fps::fromPeriodNsecs(mIdealPeriod), frameRate);
+            RefreshRateSelector::getFrameRateDivisor(Fps::fromPeriodNsecs(idealPeriod()),
+                                                     frameRate);
     return isVSyncInPhaseLocked(timePoint, static_cast<unsigned>(divisor));
 }
 
@@ -344,7 +351,7 @@
         return true;
     }
 
-    const nsecs_t period = mRateMap[mIdealPeriod].slope;
+    const nsecs_t period = mRateMap[idealPeriod()].slope;
     const nsecs_t justBeforeTimePoint = timePoint - period / 2;
     const auto vsyncSequence = getVsyncSequenceLocked(justBeforeTimePoint);
     ATRACE_FORMAT_INSTANT("vsync in: %.2f sequence: %" PRId64,
@@ -352,14 +359,38 @@
     return vsyncSequence.seq % divisor == 0;
 }
 
-void VSyncPredictor::setDisplayModeData(const DisplayModeData& displayModeData) {
-    ALOGV("%s %s: RenderRate %s notifyExpectedPresentTimeout %s", __func__, to_string(mId).c_str(),
-          to_string(displayModeData.renderRate).c_str(),
-          displayModeData.notifyExpectedPresentTimeoutOpt
-                  ? std::to_string(displayModeData.notifyExpectedPresentTimeoutOpt->ns()).c_str()
-                  : "N/A");
+void VSyncPredictor::setRenderRate(Fps renderRate) {
+    ATRACE_FORMAT("%s %s", __func__, to_string(renderRate).c_str());
+    ALOGV("%s %s: RenderRate %s ", __func__, to_string(mId).c_str(), to_string(renderRate).c_str());
     std::lock_guard lock(mMutex);
-    mDisplayModeDataOpt = displayModeData;
+    mRenderRateOpt = renderRate;
+}
+
+void VSyncPredictor::setDisplayModePtr(ftl::NonNull<DisplayModePtr> modePtr) {
+    LOG_ALWAYS_FATAL_IF(mId != modePtr->getPhysicalDisplayId(),
+                        "mode does not belong to the display");
+    ATRACE_FORMAT("%s %s", __func__, to_string(*modePtr).c_str());
+    const auto timeout = modePtr->getVrrConfig()
+            ? modePtr->getVrrConfig()->notifyExpectedPresentConfig
+            : std::nullopt;
+    ALOGV("%s %s: DisplayMode %s notifyExpectedPresentTimeout %s", __func__, to_string(mId).c_str(),
+          to_string(*modePtr).c_str(),
+          timeout ? std::to_string(timeout->notifyExpectedPresentTimeoutNs).c_str() : "N/A");
+    std::lock_guard lock(mMutex);
+
+    mDisplayModePtr = modePtr;
+    traceInt64("VSP-setPeriod", modePtr->getVsyncRate().getPeriodNsecs());
+
+    static constexpr size_t kSizeLimit = 30;
+    if (CC_UNLIKELY(mRateMap.size() == kSizeLimit)) {
+        mRateMap.erase(mRateMap.begin());
+    }
+
+    if (mRateMap.find(idealPeriod()) == mRateMap.end()) {
+        mRateMap[idealPeriod()] = {idealPeriod(), 0};
+    }
+
+    clearTimestamps();
 }
 
 VSyncPredictor::Model VSyncPredictor::getVSyncPredictionModel() const {
@@ -369,26 +400,7 @@
 }
 
 VSyncPredictor::Model VSyncPredictor::getVSyncPredictionModelLocked() const {
-    return mRateMap.find(mIdealPeriod)->second;
-}
-
-void VSyncPredictor::setPeriod(nsecs_t period) {
-    ATRACE_FORMAT("%s %s", __func__, to_string(mId).c_str());
-    traceInt64("VSP-setPeriod", period);
-
-    std::lock_guard lock(mMutex);
-    static constexpr size_t kSizeLimit = 30;
-    if (CC_UNLIKELY(mRateMap.size() == kSizeLimit)) {
-        mRateMap.erase(mRateMap.begin());
-    }
-
-    // TODO(b/308610306) mIdealPeriod to be updated with setDisplayModeData
-    mIdealPeriod = period;
-    if (mRateMap.find(period) == mRateMap.end()) {
-        mRateMap[mIdealPeriod] = {period, 0};
-    }
-
-    clearTimestamps();
+    return mRateMap.find(idealPeriod())->second;
 }
 
 void VSyncPredictor::clearTimestamps() {
@@ -412,18 +424,18 @@
 
 void VSyncPredictor::resetModel() {
     std::lock_guard lock(mMutex);
-    mRateMap[mIdealPeriod] = {mIdealPeriod, 0};
+    mRateMap[idealPeriod()] = {idealPeriod(), 0};
     clearTimestamps();
 }
 
 void VSyncPredictor::dump(std::string& result) const {
     std::lock_guard lock(mMutex);
-    StringAppendF(&result, "\tmIdealPeriod=%.2f\n", mIdealPeriod / 1e6f);
+    StringAppendF(&result, "\tmDisplayModePtr=%s\n", to_string(*mDisplayModePtr).c_str());
     StringAppendF(&result, "\tRefresh Rate Map:\n");
-    for (const auto& [idealPeriod, periodInterceptTuple] : mRateMap) {
+    for (const auto& [period, periodInterceptTuple] : mRateMap) {
         StringAppendF(&result,
                       "\t\tFor ideal period %.2fms: period = %.2fms, intercept = %" PRId64 "\n",
-                      idealPeriod / 1e6f, periodInterceptTuple.slope / 1e6f,
+                      period / 1e6f, periodInterceptTuple.slope / 1e6f,
                       periodInterceptTuple.intercept);
     }
 }
diff --git a/services/surfaceflinger/Scheduler/VSyncPredictor.h b/services/surfaceflinger/Scheduler/VSyncPredictor.h
index c271eb7..fbc1e16 100644
--- a/services/surfaceflinger/Scheduler/VSyncPredictor.h
+++ b/services/surfaceflinger/Scheduler/VSyncPredictor.h
@@ -31,14 +31,14 @@
 public:
     /*
      * \param [in] PhysicalDisplayid The display this corresponds to.
-     * \param [in] idealPeriod  The initial ideal period to use.
+     * \param [in] modePtr  The initial display mode
      * \param [in] historySize  The internal amount of entries to store in the model.
      * \param [in] minimumSamplesForPrediction The minimum number of samples to collect before
      * predicting. \param [in] outlierTolerancePercent a number 0 to 100 that will be used to filter
      * samples that fall outlierTolerancePercent from an anticipated vsync event.
      * \param [in] IVsyncTrackerCallback The callback for the VSyncTracker.
      */
-    VSyncPredictor(PhysicalDisplayId, nsecs_t idealPeriod, size_t historySize,
+    VSyncPredictor(ftl::NonNull<DisplayModePtr> modePtr, size_t historySize,
                    size_t minimumSamplesForPrediction, uint32_t outlierTolerancePercent,
                    IVsyncTrackerCallback&);
     ~VSyncPredictor();
@@ -48,15 +48,6 @@
     nsecs_t currentPeriod() const final EXCLUDES(mMutex);
     void resetModel() final EXCLUDES(mMutex);
 
-    /*
-     * Inform the model that the period is anticipated to change to a new value.
-     * model will use the period parameter to predict vsync events until enough
-     * timestamps with the new period have been collected.
-     *
-     * \param [in] period   The new period that should be used.
-     */
-    void setPeriod(nsecs_t period) final EXCLUDES(mMutex);
-
     /* Query if the model is in need of more samples to make a prediction.
      * \return  True, if model would benefit from more samples, False if not.
      */
@@ -71,7 +62,9 @@
 
     bool isVSyncInPhase(nsecs_t timePoint, Fps frameRate) const final EXCLUDES(mMutex);
 
-    void setDisplayModeData(const DisplayModeData&) final EXCLUDES(mMutex);
+    void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) final EXCLUDES(mMutex);
+
+    void setRenderRate(Fps) final EXCLUDES(mMutex);
 
     void dump(std::string& result) const final EXCLUDES(mMutex);
 
@@ -96,6 +89,7 @@
         int64_t seq;
     };
     VsyncSequence getVsyncSequenceLocked(nsecs_t timestamp) const REQUIRES(mMutex);
+    nsecs_t idealPeriod() const REQUIRES(mMutex);
 
     bool const mTraceOn;
     size_t const kHistorySize;
@@ -104,7 +98,6 @@
     IVsyncTrackerCallback& mVsyncTrackerCallback;
     std::mutex mutable mMutex;
 
-    nsecs_t mIdealPeriod GUARDED_BY(mMutex);
     std::optional<nsecs_t> mKnownTimestamp GUARDED_BY(mMutex);
 
     // Map between ideal vsync period and the calculated model
@@ -113,7 +106,8 @@
     size_t mLastTimestampIndex GUARDED_BY(mMutex) = 0;
     std::vector<nsecs_t> mTimestamps GUARDED_BY(mMutex);
 
-    std::optional<DisplayModeData> mDisplayModeDataOpt GUARDED_BY(mMutex);
+    ftl::NonNull<DisplayModePtr> mDisplayModePtr GUARDED_BY(mMutex);
+    std::optional<Fps> mRenderRateOpt GUARDED_BY(mMutex);
 
     mutable std::optional<VsyncSequence> mLastVsyncSequence GUARDED_BY(mMutex);
 };
diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.cpp b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
index 2938aa3..24737e4 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
@@ -116,32 +116,34 @@
     }
 }
 
-void VSyncReactor::startPeriodTransitionInternal(nsecs_t newPeriod) {
+void VSyncReactor::startPeriodTransitionInternal(ftl::NonNull<DisplayModePtr> modePtr) {
     ATRACE_FORMAT("%s %" PRIu64, __func__, mId.value);
     mPeriodConfirmationInProgress = true;
-    mPeriodTransitioningTo = newPeriod;
+    mModePtrTransitioningTo = modePtr.get();
     mMoreSamplesNeeded = true;
     setIgnorePresentFencesInternal(true);
 }
 
 void VSyncReactor::endPeriodTransition() {
     ATRACE_FORMAT("%s %" PRIu64, __func__, mId.value);
-    mPeriodTransitioningTo.reset();
+    mModePtrTransitioningTo.reset();
     mPeriodConfirmationInProgress = false;
     mLastHwVsync.reset();
 }
 
-void VSyncReactor::startPeriodTransition(nsecs_t period, bool force) {
-    ATRACE_INT64(ftl::Concat("VSR-", __func__, " ", mId.value).c_str(), period);
+void VSyncReactor::onDisplayModeChanged(ftl::NonNull<DisplayModePtr> modePtr, bool force) {
+    ATRACE_INT64(ftl::Concat("VSR-", __func__, " ", mId.value).c_str(),
+                 modePtr->getVsyncRate().getPeriodNsecs());
     std::lock_guard lock(mMutex);
     mLastHwVsync.reset();
 
-    if (!mSupportKernelIdleTimer && period == mTracker.currentPeriod() && !force) {
+    if (!mSupportKernelIdleTimer &&
+        modePtr->getVsyncRate().getPeriodNsecs() == mTracker.currentPeriod() && !force) {
         endPeriodTransition();
         setIgnorePresentFencesInternal(false);
         mMoreSamplesNeeded = false;
     } else {
-        startPeriodTransitionInternal(period);
+        startPeriodTransitionInternal(modePtr);
     }
 }
 
@@ -159,14 +161,16 @@
         return false;
     }
 
-    const bool periodIsChanging =
-            mPeriodTransitioningTo && (*mPeriodTransitioningTo != mTracker.currentPeriod());
+    const std::optional<Period> newPeriod = mModePtrTransitioningTo
+            ? mModePtrTransitioningTo->getVsyncRate().getPeriod()
+            : std::optional<Period>{};
+    const bool periodIsChanging = newPeriod && (newPeriod->ns() != mTracker.currentPeriod());
     if (mSupportKernelIdleTimer && !periodIsChanging) {
         // Clear out the Composer-provided period and use the allowance logic below
         HwcVsyncPeriod = {};
     }
 
-    auto const period = mPeriodTransitioningTo ? *mPeriodTransitioningTo : mTracker.currentPeriod();
+    auto const period = newPeriod ? newPeriod->ns() : mTracker.currentPeriod();
     static constexpr int allowancePercent = 10;
     static constexpr std::ratio<allowancePercent, 100> allowancePercentRatio;
     auto const allowance = period * allowancePercentRatio.num / allowancePercentRatio.den;
@@ -185,8 +189,8 @@
     std::lock_guard lock(mMutex);
     if (periodConfirmed(timestamp, hwcVsyncPeriod)) {
         ATRACE_FORMAT("VSR %" PRIu64 ": period confirmed", mId.value);
-        if (mPeriodTransitioningTo) {
-            mTracker.setPeriod(*mPeriodTransitioningTo);
+        if (mModePtrTransitioningTo) {
+            mTracker.setDisplayModePtr(ftl::as_non_null(mModePtrTransitioningTo));
             *periodFlushed = true;
         }
 
@@ -228,10 +232,11 @@
                   mInternalIgnoreFences, mExternalIgnoreFences);
     StringAppendF(&result, "mMoreSamplesNeeded=%d mPeriodConfirmationInProgress=%d\n",
                   mMoreSamplesNeeded, mPeriodConfirmationInProgress);
-    if (mPeriodTransitioningTo) {
-        StringAppendF(&result, "mPeriodTransitioningTo=%" PRId64 "\n", *mPeriodTransitioningTo);
+    if (mModePtrTransitioningTo) {
+        StringAppendF(&result, "mModePtrTransitioningTo=%s\n",
+                      to_string(*mModePtrTransitioningTo).c_str());
     } else {
-        StringAppendF(&result, "mPeriodTransitioningTo=nullptr\n");
+        StringAppendF(&result, "mModePtrTransitioningTo=nullptr\n");
     }
 
     if (mLastHwVsync) {
diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.h b/services/surfaceflinger/Scheduler/VSyncReactor.h
index f230242..2415a66 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.h
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.h
@@ -27,6 +27,7 @@
 
 #include <scheduler/TimeKeeper.h>
 
+#include "VSyncTracker.h"
 #include "VsyncController.h"
 
 namespace android::scheduler {
@@ -45,7 +46,7 @@
     bool addPresentFence(std::shared_ptr<FenceTime>) final;
     void setIgnorePresentFences(bool ignore) final;
 
-    void startPeriodTransition(nsecs_t period, bool force) final;
+    void onDisplayModeChanged(ftl::NonNull<DisplayModePtr>, bool force) final;
 
     bool addHwVsyncTimestamp(nsecs_t timestamp, std::optional<nsecs_t> hwcVsyncPeriod,
                              bool* periodFlushed) final;
@@ -57,7 +58,7 @@
 private:
     void setIgnorePresentFencesInternal(bool ignore) REQUIRES(mMutex);
     void updateIgnorePresentFencesInternal() REQUIRES(mMutex);
-    void startPeriodTransitionInternal(nsecs_t newPeriod) REQUIRES(mMutex);
+    void startPeriodTransitionInternal(ftl::NonNull<DisplayModePtr>) REQUIRES(mMutex);
     void endPeriodTransition() REQUIRES(mMutex);
     bool periodConfirmed(nsecs_t vsync_timestamp, std::optional<nsecs_t> hwcVsyncPeriod)
             REQUIRES(mMutex);
@@ -74,7 +75,7 @@
 
     bool mMoreSamplesNeeded GUARDED_BY(mMutex) = false;
     bool mPeriodConfirmationInProgress GUARDED_BY(mMutex) = false;
-    std::optional<nsecs_t> mPeriodTransitioningTo GUARDED_BY(mMutex);
+    DisplayModePtr mModePtrTransitioningTo GUARDED_BY(mMutex);
     std::optional<nsecs_t> mLastHwVsync GUARDED_BY(mMutex);
 
     hal::PowerMode mDisplayPowerMode GUARDED_BY(mMutex) = hal::PowerMode::ON;
diff --git a/services/surfaceflinger/Scheduler/VSyncTracker.h b/services/surfaceflinger/Scheduler/VSyncTracker.h
index 7eedc31..2ae5c0b 100644
--- a/services/surfaceflinger/Scheduler/VSyncTracker.h
+++ b/services/surfaceflinger/Scheduler/VSyncTracker.h
@@ -20,25 +20,16 @@
 #include <utils/Timers.h>
 
 #include <scheduler/Fps.h>
+#include <scheduler/FrameRateMode.h>
 
 #include "VSyncDispatch.h"
 
 namespace android::scheduler {
 
-struct DisplayModeData {
-    Fps renderRate;
-    std::optional<Period> notifyExpectedPresentTimeoutOpt;
-
-    bool operator==(const DisplayModeData& other) const {
-        return isApproxEqual(renderRate, other.renderRate) &&
-                notifyExpectedPresentTimeoutOpt == other.notifyExpectedPresentTimeoutOpt;
-    }
-};
-
 struct IVsyncTrackerCallback {
     virtual ~IVsyncTrackerCallback() = default;
-    virtual void onVsyncGenerated(PhysicalDisplayId, TimePoint expectedPresentTime,
-                                  const DisplayModeData&, Period vsyncPeriod) = 0;
+    virtual void onVsyncGenerated(TimePoint expectedPresentTime, ftl::NonNull<DisplayModePtr>,
+                                  Fps renderRate) = 0;
 };
 
 /*
@@ -77,13 +68,6 @@
      */
     virtual nsecs_t currentPeriod() const = 0;
 
-    /*
-     * Inform the tracker that the period is changing and the tracker needs to recalibrate itself.
-     *
-     * \param [in] period   The period that the system is changing into.
-     */
-    virtual void setPeriod(nsecs_t period) = 0;
-
     /* Inform the tracker that the samples it has are not accurate for prediction. */
     virtual void resetModel() = 0;
 
@@ -98,20 +82,25 @@
     virtual bool isVSyncInPhase(nsecs_t timePoint, Fps frameRate) const = 0;
 
     /*
-     * Sets the metadata about the currently active display mode such as VRR
-     * timeout period, vsyncPeriod and framework property such as render rate.
-     * If the render rate is not a divisor of the period, the render rate is
-     * ignored until the period changes.
+     * Sets the active mode of the display which includes the vsync period and other VRR attributes.
+     * This will inform the tracker that the period is changing and the tracker needs to recalibrate
+     * itself.
+     *
+     * \param [in] DisplayModePtr The display mode the tracker will use.
+     */
+    virtual void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) = 0;
+
+    /*
+     * Sets a render rate on the tracker. If the render rate is not a divisor
+     * of the period, the render rate is ignored until the period changes.
      * The tracker will continue to track the vsync timeline and expect it
      * to match the current period, however, nextAnticipatedVSyncTimeFrom will
      * return vsyncs according to the render rate set. Setting a render rate is useful
      * when a display is running at 120Hz but the render frame rate is 60Hz.
-     * When IVsyncTrackerCallback::onVsyncGenerated callback is made we will pass along
-     * the vsyncPeriod, render rate and timeoutNs.
      *
-     * \param [in] DisplayModeData The DisplayModeData the tracker will use.
+     * \param [in] Fps   The render rate the tracker should operate at.
      */
-    virtual void setDisplayModeData(const DisplayModeData&) = 0;
+    virtual void setRenderRate(Fps) = 0;
 
     virtual void dump(std::string& result) const = 0;
 
diff --git a/services/surfaceflinger/Scheduler/VsyncController.h b/services/surfaceflinger/Scheduler/VsyncController.h
index 9177899..807a7fb 100644
--- a/services/surfaceflinger/Scheduler/VsyncController.h
+++ b/services/surfaceflinger/Scheduler/VsyncController.h
@@ -22,6 +22,7 @@
 
 #include <DisplayHardware/HWComposer.h>
 #include <DisplayHardware/Hal.h>
+#include <scheduler/FrameRateMode.h>
 #include <ui/FenceTime.h>
 #include <utils/Mutex.h>
 #include <utils/RefBase.h>
@@ -59,13 +60,14 @@
                                      bool* periodFlushed) = 0;
 
     /*
-     * Inform the controller that the period is changing and the controller needs to recalibrate
-     * itself. The controller will end the period transition internally.
+     * Inform the controller that the display mode is changing and the controller needs to
+     * recalibrate itself to the new vsync period. The controller will end the period transition
+     * internally.
      *
-     * \param [in] period   The period that the system is changing into.
+     * \param [in] DisplayModePtr  The new mode the display is changing to.
      * \param [in] force    True to recalibrate even if period matches the existing period.
      */
-    virtual void startPeriodTransition(nsecs_t period, bool force) = 0;
+    virtual void onDisplayModeChanged(ftl::NonNull<DisplayModePtr>, bool force) = 0;
 
     /*
      * Tells the tracker to stop using present fences to get a vsync signal.
diff --git a/services/surfaceflinger/Scheduler/VsyncSchedule.cpp b/services/surfaceflinger/Scheduler/VsyncSchedule.cpp
index 5fb53f9..4a8aac6 100644
--- a/services/surfaceflinger/Scheduler/VsyncSchedule.cpp
+++ b/services/surfaceflinger/Scheduler/VsyncSchedule.cpp
@@ -16,6 +16,8 @@
 
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
+#include <common/FlagManager.h>
+
 #include <ftl/fake_guard.h>
 #include <scheduler/Fps.h>
 #include <scheduler/Timer.h>
@@ -53,14 +55,14 @@
     VSyncCallbackRegistration mRegistration;
 };
 
-VsyncSchedule::VsyncSchedule(PhysicalDisplayId id, FeatureFlags features,
+VsyncSchedule::VsyncSchedule(ftl::NonNull<DisplayModePtr> modePtr, FeatureFlags features,
                              RequestHardwareVsync requestHardwareVsync,
                              IVsyncTrackerCallback& callback)
-      : mId(id),
+      : mId(modePtr->getPhysicalDisplayId()),
         mRequestHardwareVsync(std::move(requestHardwareVsync)),
-        mTracker(createTracker(id, callback)),
+        mTracker(createTracker(modePtr, callback)),
         mDispatch(createDispatch(mTracker)),
-        mController(createController(id, *mTracker, features)),
+        mController(createController(modePtr->getPhysicalDisplayId(), *mTracker, features)),
         mTracer(features.test(Feature::kTracePredictedVsync)
                         ? std::make_unique<PredictedVsyncTracer>(mDispatch)
                         : nullptr) {}
@@ -101,17 +103,15 @@
     mDispatch->dump(out);
 }
 
-VsyncSchedule::TrackerPtr VsyncSchedule::createTracker(PhysicalDisplayId id,
+VsyncSchedule::TrackerPtr VsyncSchedule::createTracker(ftl::NonNull<DisplayModePtr> modePtr,
                                                        IVsyncTrackerCallback& callback) {
     // TODO(b/144707443): Tune constants.
-    constexpr nsecs_t kInitialPeriod = (60_Hz).getPeriodNsecs();
     constexpr size_t kHistorySize = 20;
     constexpr size_t kMinSamplesForPrediction = 6;
     constexpr uint32_t kDiscardOutlierPercent = 20;
 
-    return std::make_unique<VSyncPredictor>(id, kInitialPeriod, kHistorySize,
-                                            kMinSamplesForPrediction, kDiscardOutlierPercent,
-                                            callback);
+    return std::make_unique<VSyncPredictor>(modePtr, kHistorySize, kMinSamplesForPrediction,
+                                            kDiscardOutlierPercent, callback);
 }
 
 VsyncSchedule::DispatchPtr VsyncSchedule::createDispatch(TrackerPtr tracker) {
@@ -140,9 +140,9 @@
     return reactor;
 }
 
-void VsyncSchedule::startPeriodTransition(Period period, bool force) {
+void VsyncSchedule::onDisplayModeChanged(ftl::NonNull<DisplayModePtr> modePtr, bool force) {
     std::lock_guard<std::mutex> lock(mHwVsyncLock);
-    mController->startPeriodTransition(period.ns(), force);
+    mController->onDisplayModeChanged(modePtr, force);
     enableHardwareVsyncLocked();
 }
 
diff --git a/services/surfaceflinger/Scheduler/VsyncSchedule.h b/services/surfaceflinger/Scheduler/VsyncSchedule.h
index ca61f87..60c4105 100644
--- a/services/surfaceflinger/Scheduler/VsyncSchedule.h
+++ b/services/surfaceflinger/Scheduler/VsyncSchedule.h
@@ -57,21 +57,22 @@
 public:
     using RequestHardwareVsync = std::function<void(PhysicalDisplayId, bool enabled)>;
 
-    VsyncSchedule(PhysicalDisplayId, FeatureFlags, RequestHardwareVsync, IVsyncTrackerCallback&);
+    VsyncSchedule(ftl::NonNull<DisplayModePtr> modePtr, FeatureFlags, RequestHardwareVsync,
+                  IVsyncTrackerCallback&);
     ~VsyncSchedule();
 
     // IVsyncSource overrides:
     Period period() const override;
     TimePoint vsyncDeadlineAfter(TimePoint) const override;
 
-    // Inform the schedule that the period is changing and the schedule needs to recalibrate
-    // itself. The schedule will end the period transition internally. This will
-    // enable hardware VSYNCs in order to calibrate.
+    // Inform the schedule that the display mode changed the schedule needs to recalibrate
+    // itself to the new vsync period. The schedule will end the period transition internally.
+    // This will enable hardware VSYNCs in order to calibrate.
     //
-    // \param [in] period   The period that the system is changing into.
+    // \param [in] DisplayModePtr  The mode that the display is changing to.
     // \param [in] force    True to force a transition even if it is not a
     //                      change.
-    void startPeriodTransition(Period period, bool force);
+    void onDisplayModeChanged(ftl::NonNull<DisplayModePtr>, bool force);
 
     // Pass a VSYNC sample to VsyncController. Return true if
     // VsyncController detected that the VSYNC period changed. Enable or disable
@@ -125,7 +126,7 @@
     friend class android::VsyncScheduleTest;
     friend class android::fuzz::SchedulerFuzzer;
 
-    static TrackerPtr createTracker(PhysicalDisplayId, IVsyncTrackerCallback&);
+    static TrackerPtr createTracker(ftl::NonNull<DisplayModePtr> modePtr, IVsyncTrackerCallback&);
     static DispatchPtr createDispatch(TrackerPtr);
     static ControllerPtr createController(PhysicalDisplayId, VsyncTracker&, FeatureFlags);
 
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index c15e74f..2e70b22 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1202,7 +1202,7 @@
             // Start receiving vsync samples now, so that we can detect a period
             // switch.
             mScheduler->resyncToHardwareVsync(displayId, true /* allowToEnable */,
-                                              mode.modePtr->getVsyncRate());
+                                              mode.modePtr.get());
 
             // As we called to set period, we will call to onRefreshRateChangeCompleted once
             // VsyncController model is locked.
@@ -1332,10 +1332,9 @@
     const auto desiredModeOpt = display->getDesiredMode();
     const auto& modeOpt = desiredModeOpt->modeOpt;
     const auto displayId = modeOpt->modePtr->getPhysicalDisplayId();
-    const auto vsyncRate = modeOpt->modePtr->getVsyncRate();
     const auto renderFps = modeOpt->fps;
     dropModeRequest(display);
-    mScheduler->resyncToHardwareVsync(displayId, true /* allowToEnable */, vsyncRate);
+    mScheduler->resyncToHardwareVsync(displayId, true /* allowToEnable */, modeOpt->modePtr.get());
     mScheduler->setRenderRate(displayId, renderFps);
 
     if (displayId == mActiveDisplayId) {
@@ -4035,15 +4034,23 @@
     }
 }
 
-void SurfaceFlinger::onVsyncGenerated(PhysicalDisplayId displayId, TimePoint expectedPresentTime,
-                                      const scheduler::DisplayModeData& displayModeData,
-                                      Period vsyncPeriod) {
-    const auto status =
-            getHwComposer()
-                    .notifyExpectedPresentIfRequired(displayId, vsyncPeriod, expectedPresentTime,
-                                                     displayModeData.renderRate,
-                                                     displayModeData
-                                                             .notifyExpectedPresentTimeoutOpt);
+void SurfaceFlinger::onVsyncGenerated(TimePoint expectedPresentTime,
+                                      ftl::NonNull<DisplayModePtr> modePtr, Fps renderRate) {
+    const auto vsyncPeriod = modePtr->getVsyncRate().getPeriod();
+    const auto timeout = [&]() -> std::optional<Period> {
+        const auto vrrConfig = modePtr->getVrrConfig();
+        if (!vrrConfig) return std::nullopt;
+
+        const auto notifyExpectedPresentConfig =
+                modePtr->getVrrConfig()->notifyExpectedPresentConfig;
+        if (!notifyExpectedPresentConfig) return std::nullopt;
+        return Period::fromNs(notifyExpectedPresentConfig->notifyExpectedPresentTimeoutNs);
+    }();
+
+    const auto displayId = modePtr->getPhysicalDisplayId();
+    const auto status = getHwComposer().notifyExpectedPresentIfRequired(displayId, vsyncPeriod,
+                                                                        expectedPresentTime,
+                                                                        renderRate, timeout);
     if (status != NO_ERROR) {
         ALOGE("%s failed to notifyExpectedPresentHint for display %" PRId64, __func__,
               displayId.value);
@@ -5765,7 +5772,7 @@
 
     display->setPowerMode(mode);
 
-    const auto refreshRate = display->refreshRateSelector().getActiveMode().modePtr->getVsyncRate();
+    const auto activeMode = display->refreshRateSelector().getActiveMode().modePtr;
     if (!currentModeOpt || *currentModeOpt == hal::PowerMode::OFF) {
         // Turn on the display
 
@@ -5802,7 +5809,7 @@
             mScheduler->enableSyntheticVsync(false);
 
             constexpr bool kAllowToEnable = true;
-            mScheduler->resyncToHardwareVsync(displayId, kAllowToEnable, refreshRate);
+            mScheduler->resyncToHardwareVsync(displayId, kAllowToEnable, activeMode.get());
         }
 
         mVisibleRegionsDirty = true;
@@ -5844,7 +5851,8 @@
             mVisibleRegionsDirty = true;
             scheduleRepaint();
             mScheduler->enableSyntheticVsync(false);
-            mScheduler->resyncToHardwareVsync(displayId, true /* allowToEnable */, refreshRate);
+            mScheduler->resyncToHardwareVsync(displayId, true /* allowToEnable */,
+                                              activeMode.get());
         }
     } else if (mode == hal::PowerMode::DOZE_SUSPEND) {
         // Leave display going to doze
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 75fd25a..e90f8fe 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -658,8 +658,8 @@
     void notifyCpuLoadUp() override;
 
     // IVsyncTrackerCallback overrides
-    void onVsyncGenerated(PhysicalDisplayId, TimePoint expectedPresentTime,
-                          const scheduler::DisplayModeData&, Period vsyncPeriod) override;
+    void onVsyncGenerated(TimePoint expectedPresentTime, ftl::NonNull<DisplayModePtr>,
+                          Fps renderRate) override;
 
     // Toggles the kernel idle timer on or off depending the policy decisions around refresh rates.
     void toggleKernelIdleTimer() REQUIRES(mStateLock);
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h b/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h
index 9b2d453..4fc39cc 100644
--- a/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_fuzzers_utils.h
@@ -806,8 +806,7 @@
     void onChoreographerAttached() override {}
 
     // IVsyncTrackerCallback overrides
-    void onVsyncGenerated(PhysicalDisplayId, TimePoint, const scheduler::DisplayModeData&,
-                          Period) override {}
+    void onVsyncGenerated(TimePoint, ftl::NonNull<DisplayModePtr>, Fps) override {}
 
     surfaceflinger::test::Factory mFactory;
     sp<SurfaceFlinger> mFlinger =
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.cpp b/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.cpp
index 8fcfd81..101f04f 100644
--- a/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.cpp
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.cpp
@@ -28,6 +28,7 @@
 #include "Scheduler/VSyncPredictor.h"
 #include "Scheduler/VSyncReactor.h"
 
+#include "mock/DisplayHardware/MockDisplayMode.h"
 #include "mock/MockVSyncDispatch.h"
 #include "mock/MockVSyncTracker.h"
 
@@ -179,8 +180,7 @@
 }
 
 struct VsyncTrackerCallback : public scheduler::IVsyncTrackerCallback {
-    void onVsyncGenerated(PhysicalDisplayId, TimePoint, const scheduler::DisplayModeData&,
-                          Period) override {}
+    void onVsyncGenerated(TimePoint, ftl::NonNull<DisplayModePtr>, Fps) override {}
 };
 
 void SchedulerFuzzer::fuzzVSyncPredictor() {
@@ -189,14 +189,14 @@
     uint16_t minimumSamplesForPrediction = mFdp.ConsumeIntegralInRange<uint16_t>(1, UINT16_MAX);
     nsecs_t idealPeriod = mFdp.ConsumeIntegralInRange<nsecs_t>(1, UINT32_MAX);
     VsyncTrackerCallback callback;
-    scheduler::VSyncPredictor tracker{kDisplayId,
-                                      idealPeriod,
-                                      historySize,
-                                      minimumSamplesForPrediction,
+    const auto mode = ftl::as_non_null(
+            mock::createDisplayMode(DisplayModeId(0), Fps::fromPeriodNsecs(idealPeriod)));
+    scheduler::VSyncPredictor tracker{mode, historySize, minimumSamplesForPrediction,
                                       mFdp.ConsumeIntegral<uint32_t>() /*outlierTolerancePercent*/,
                                       callback};
     uint16_t period = mFdp.ConsumeIntegral<uint16_t>();
-    tracker.setPeriod(period);
+    tracker.setDisplayModePtr(ftl::as_non_null(
+            mock::createDisplayMode(DisplayModeId(0), Fps::fromPeriodNsecs(period))));
     for (uint16_t i = 0; i < minimumSamplesForPrediction; ++i) {
         if (!tracker.needsMoreSamples()) {
             break;
@@ -271,7 +271,10 @@
                                     *vSyncTracker, mFdp.ConsumeIntegral<uint8_t>() /*pendingLimit*/,
                                     false);
 
-    reactor.startPeriodTransition(mFdp.ConsumeIntegral<nsecs_t>(), mFdp.ConsumeBool());
+    const auto mode = ftl::as_non_null(
+            mock::createDisplayMode(DisplayModeId(0),
+                                    Fps::fromPeriodNsecs(mFdp.ConsumeIntegral<nsecs_t>())));
+    reactor.onDisplayModeChanged(mode, mFdp.ConsumeBool());
     bool periodFlushed = false; // Value does not matter, since this is an out
                                 // param from addHwVsyncTimestamp.
     reactor.addHwVsyncTimestamp(0, std::nullopt, &periodFlushed);
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h b/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h
index 728708f..165de1d 100644
--- a/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h
@@ -90,8 +90,6 @@
 
     nsecs_t currentPeriod() const override { return 1; }
 
-    void setPeriod(nsecs_t /* period */) override {}
-
     void resetModel() override {}
 
     bool needsMoreSamples() const override { return true; }
@@ -100,7 +98,7 @@
         return true;
     }
 
-    void setDisplayModeData(const scheduler::DisplayModeData&) override {}
+    void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) override {}
 
     nsecs_t nextVSyncTime(nsecs_t timePoint) const {
         if (timePoint % mPeriod == 0) {
@@ -109,6 +107,8 @@
         return (timePoint - (timePoint % mPeriod) + mPeriod);
     }
 
+    void setRenderRate(Fps) override {}
+
     void dump(std::string& /* result */) const override {}
 
 protected:
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
index cf3fab3..31e1330 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
@@ -25,6 +25,11 @@
 namespace android {
 namespace {
 
+MATCHER_P(DisplayModeFps, value, "equals") {
+    using fps_approx_ops::operator==;
+    return arg->getVsyncRate() == value;
+}
+
 // Used when we simulate a display that supports doze.
 template <typename Display>
 struct DozeIsSupportedVariant {
@@ -94,7 +99,8 @@
     static void setupResetModelCallExpectations(DisplayTransactionTest* test) {
         auto vsyncSchedule = test->mFlinger.scheduler()->getVsyncSchedule();
         EXPECT_CALL(static_cast<mock::VsyncController&>(vsyncSchedule->getController()),
-                    startPeriodTransition(DEFAULT_VSYNC_PERIOD, false))
+                    onDisplayModeChanged(DisplayModeFps(Fps::fromPeriodNsecs(DEFAULT_VSYNC_PERIOD)),
+                                         false))
                 .Times(1);
         EXPECT_CALL(static_cast<mock::VSyncTracker&>(vsyncSchedule->getTracker()), resetModel())
                 .Times(1);
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
index 4be07a1..2188831 100644
--- a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
@@ -50,11 +50,11 @@
 
     nsecs_t currentPeriod() const final { return mPeriod; }
 
-    void setPeriod(nsecs_t) final {}
     void resetModel() final {}
     bool needsMoreSamples() const final { return false; }
     bool isVSyncInPhase(nsecs_t, Fps) const final { return false; }
-    void setDisplayModeData(const DisplayModeData&) final {}
+    void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) final {}
+    void setRenderRate(Fps) final {}
     void dump(std::string&) const final {}
 
 private:
@@ -88,11 +88,11 @@
         return mPeriod;
     }
 
-    void setPeriod(nsecs_t) final {}
     void resetModel() final {}
     bool needsMoreSamples() const final { return false; }
     bool isVSyncInPhase(nsecs_t, Fps) const final { return false; }
-    void setDisplayModeData(const DisplayModeData&) final {}
+    void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) final {}
+    void setRenderRate(Fps) final {}
     void dump(std::string&) const final {}
 
 private:
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp
index 8310866..b97ebba 100644
--- a/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchTimerQueueTest.cpp
@@ -33,6 +33,7 @@
 #include "FlagUtils.h"
 #include "Scheduler/VSyncDispatchTimerQueue.h"
 #include "Scheduler/VSyncTracker.h"
+#include "mock/MockVSyncTracker.h"
 
 #include <com_android_graphics_surfaceflinger_flags.h>
 
@@ -42,7 +43,7 @@
 namespace android::scheduler {
 using namespace com::android::graphics::surfaceflinger;
 
-class MockVSyncTracker : public VSyncTracker {
+class MockVSyncTracker : public mock::VSyncTracker {
 public:
     MockVSyncTracker(nsecs_t period) : mPeriod{period} {
         ON_CALL(*this, nextAnticipatedVSyncTimeFrom(_))
@@ -52,16 +53,6 @@
                 .WillByDefault(Invoke(this, &MockVSyncTracker::getCurrentPeriod));
     }
 
-    MOCK_METHOD1(addVsyncTimestamp, bool(nsecs_t));
-    MOCK_CONST_METHOD1(nextAnticipatedVSyncTimeFrom, nsecs_t(nsecs_t));
-    MOCK_CONST_METHOD0(currentPeriod, nsecs_t());
-    MOCK_METHOD1(setPeriod, void(nsecs_t));
-    MOCK_METHOD0(resetModel, void());
-    MOCK_CONST_METHOD0(needsMoreSamples, bool());
-    MOCK_CONST_METHOD2(isVSyncInPhase, bool(nsecs_t, Fps));
-    MOCK_METHOD(void, setDisplayModeData, (const DisplayModeData&), (override));
-    MOCK_CONST_METHOD1(dump, void(std::string&));
-
     nsecs_t nextVSyncTime(nsecs_t timePoint) const {
         if (timePoint % mPeriod == 0) {
             return timePoint;
diff --git a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
index 30a2855..01f5af4 100644
--- a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
@@ -25,6 +25,7 @@
 
 #include "FlagUtils.h"
 #include "Scheduler/VSyncPredictor.h"
+#include "mock/DisplayHardware/MockDisplayMode.h"
 #include "mock/MockVsyncTrackerCallback.h"
 
 #include <gmock/gmock.h>
@@ -39,12 +40,24 @@
 using namespace std::literals;
 using namespace com::android::graphics::surfaceflinger;
 
+using NotifyExpectedPresentConfig =
+        ::aidl::android::hardware::graphics::composer3::VrrConfig::NotifyExpectedPresentConfig;
+
+using android::mock::createDisplayMode;
+using android::mock::createVrrDisplayMode;
+
 namespace android::scheduler {
 
+namespace {
 MATCHER_P2(IsCloseTo, value, tolerance, "is within tolerance") {
     return arg <= value + tolerance && arg >= value - tolerance;
 }
 
+MATCHER_P(FpsMatcher, value, "equals") {
+    using fps_approx_ops::operator==;
+    return arg == value;
+}
+
 std::vector<nsecs_t> generateVsyncTimestamps(size_t count, nsecs_t period, nsecs_t bias) {
     std::vector<nsecs_t> vsyncs(count);
     std::generate(vsyncs.begin(), vsyncs.end(),
@@ -54,21 +67,27 @@
 
 constexpr PhysicalDisplayId DEFAULT_DISPLAY_ID = PhysicalDisplayId::fromPort(42u);
 
+ftl::NonNull<DisplayModePtr> displayMode(nsecs_t period) {
+    const int32_t kGroup = 0;
+    const auto kResolution = ui::Size(1920, 1080);
+    const auto refreshRate = Fps::fromPeriodNsecs(period);
+    return ftl::as_non_null(createDisplayMode(DisplayModeId(0), refreshRate, kGroup, kResolution,
+                                              DEFAULT_DISPLAY_ID));
+}
+} // namespace
+
 struct VSyncPredictorTest : testing::Test {
     nsecs_t mNow = 0;
     nsecs_t mPeriod = 1000;
+    ftl::NonNull<DisplayModePtr> mMode = displayMode(mPeriod);
     scheduler::mock::VsyncTrackerCallback mVsyncTrackerCallback;
     static constexpr size_t kHistorySize = 10;
     static constexpr size_t kMinimumSamplesForPrediction = 6;
     static constexpr size_t kOutlierTolerancePercent = 25;
     static constexpr nsecs_t mMaxRoundingError = 100;
 
-    VSyncPredictor tracker{DEFAULT_DISPLAY_ID,
-                           mPeriod,
-                           kHistorySize,
-                           kMinimumSamplesForPrediction,
-                           kOutlierTolerancePercent,
-                           mVsyncTrackerCallback};
+    VSyncPredictor tracker{mMode, kHistorySize, kMinimumSamplesForPrediction,
+                           kOutlierTolerancePercent, mVsyncTrackerCallback};
 };
 
 TEST_F(VSyncPredictorTest, reportsAnticipatedPeriod) {
@@ -78,7 +97,7 @@
     EXPECT_THAT(model.intercept, Eq(0));
 
     auto const changedPeriod = 2000;
-    tracker.setPeriod(changedPeriod);
+    tracker.setDisplayModePtr(displayMode(changedPeriod));
     model = tracker.getVSyncPredictionModel();
     EXPECT_THAT(model.slope, Eq(changedPeriod));
     EXPECT_THAT(model.intercept, Eq(0));
@@ -99,7 +118,7 @@
     EXPECT_FALSE(tracker.needsMoreSamples());
 
     auto const changedPeriod = mPeriod * 2;
-    tracker.setPeriod(changedPeriod);
+    tracker.setDisplayModePtr(displayMode(changedPeriod));
     EXPECT_TRUE(tracker.needsMoreSamples());
 
     for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
@@ -133,7 +152,7 @@
     }
 
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + slightlyLessPeriod));
-    tracker.setPeriod(changedPeriod);
+    tracker.setDisplayModePtr(displayMode(changedPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + changedPeriod));
 }
 
@@ -179,7 +198,7 @@
     auto constexpr expectedPeriod = 16639242;
     auto constexpr expectedIntercept = 1049341;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -198,7 +217,7 @@
     auto expectedPeriod = 11089413;
     auto expectedIntercept = 94421;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -225,7 +244,7 @@
     auto expectedPeriod = 45450152;
     auto expectedIntercept = 469647;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -251,7 +270,7 @@
     auto expectedPeriod = 1999892;
     auto expectedIntercept = 86342;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -271,7 +290,7 @@
     auto const simulatedVsyncsSlow =
             generateVsyncTimestamps(kMinimumSamplesForPrediction, slowPeriod, slowTimeBase);
 
-    tracker.setPeriod(fastPeriod);
+    tracker.setDisplayModePtr(displayMode(fastPeriod));
     for (auto const& timestamp : simulatedVsyncsFast) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -281,7 +300,7 @@
     EXPECT_THAT(model.slope, IsCloseTo(fastPeriod, mMaxRoundingError));
     EXPECT_THAT(model.intercept, IsCloseTo(0, mMaxRoundingError));
 
-    tracker.setPeriod(slowPeriod);
+    tracker.setDisplayModePtr(displayMode(slowPeriod));
     for (auto const& timestamp : simulatedVsyncsSlow) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -305,7 +324,7 @@
             generateVsyncTimestamps(kMinimumSamplesForPrediction, fastPeriod2, fastTimeBase);
 
     auto idealPeriod = 100000;
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncsFast) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -313,14 +332,14 @@
     EXPECT_THAT(model.slope, Eq(fastPeriod));
     EXPECT_THAT(model.intercept, Eq(0));
 
-    tracker.setPeriod(slowPeriod);
+    tracker.setDisplayModePtr(displayMode(slowPeriod));
     for (auto const& timestamp : simulatedVsyncsSlow) {
         tracker.addVsyncTimestamp(timestamp);
     }
 
     // we had a model for 100ns mPeriod before, use that until the new samples are
     // sufficiently built up
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     model = tracker.getVSyncPredictionModel();
     EXPECT_THAT(model.slope, Eq(fastPeriod));
     EXPECT_THAT(model.intercept, Eq(0));
@@ -369,7 +388,7 @@
     auto const expectedPeriod = 11113919;
     auto const expectedIntercept = -1195945;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -388,11 +407,8 @@
 
 // See b/151146131
 TEST_F(VSyncPredictorTest, hasEnoughPrecision) {
-    VSyncPredictor tracker{DEFAULT_DISPLAY_ID,
-                           mPeriod,
-                           20,
-                           kMinimumSamplesForPrediction,
-                           kOutlierTolerancePercent,
+    const auto mode = displayMode(mPeriod);
+    VSyncPredictor tracker{mode, 20, kMinimumSamplesForPrediction, kOutlierTolerancePercent,
                            mVsyncTrackerCallback};
     std::vector<nsecs_t> const simulatedVsyncs{840873348817, 840890049444, 840906762675,
                                                840923581635, 840940161584, 840956868096,
@@ -407,7 +423,7 @@
     auto const expectedPeriod = 16698426;
     auto const expectedIntercept = 58055;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -420,7 +436,7 @@
 TEST_F(VSyncPredictorTest, resetsWhenInstructed) {
     auto const idealPeriod = 10000;
     auto const realPeriod = 10500;
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto i = 0; i < kMinimumSamplesForPrediction; i++) {
         tracker.addVsyncTimestamp(i * realPeriod);
     }
@@ -562,7 +578,7 @@
     auto constexpr expectedPeriod = 16'644'742;
     auto constexpr expectedIntercept = 125'626;
 
-    tracker.setPeriod(idealPeriod);
+    tracker.setDisplayModePtr(displayMode(idealPeriod));
     for (auto const& timestamp : simulatedVsyncs) {
         tracker.addVsyncTimestamp(timestamp);
     }
@@ -580,7 +596,7 @@
         tracker.addVsyncTimestamp(mNow);
     }
 
-    tracker.setDisplayModeData({.renderRate = Fps::fromPeriodNsecs(3 * mPeriod)});
+    tracker.setRenderRate(Fps::fromPeriodNsecs(3 * mPeriod));
 
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 100), Eq(mNow + mPeriod));
@@ -602,12 +618,12 @@
 
     const auto refreshRate = Fps::fromPeriodNsecs(mPeriod);
 
-    tracker.setDisplayModeData({.renderRate = refreshRate / 4});
+    tracker.setRenderRate(refreshRate / 4);
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 3 * mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 3 * mPeriod), Eq(mNow + 7 * mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 7 * mPeriod), Eq(mNow + 11 * mPeriod));
 
-    tracker.setDisplayModeData({.renderRate = refreshRate / 2});
+    tracker.setRenderRate(refreshRate / 2);
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 1 * mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1 * mPeriod), Eq(mNow + 3 * mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 3 * mPeriod), Eq(mNow + 5 * mPeriod));
@@ -615,7 +631,7 @@
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 7 * mPeriod), Eq(mNow + 9 * mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 9 * mPeriod), Eq(mNow + 11 * mPeriod));
 
-    tracker.setDisplayModeData({.renderRate = refreshRate / 6});
+    tracker.setRenderRate(refreshRate / 6);
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 1 * mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1 * mPeriod), Eq(mNow + 7 * mPeriod));
 }
@@ -629,7 +645,7 @@
         tracker.addVsyncTimestamp(mNow);
     }
 
-    tracker.setDisplayModeData({.renderRate = Fps::fromPeriodNsecs(3.5f * mPeriod)});
+    tracker.setRenderRate(Fps::fromPeriodNsecs(3.5f * mPeriod));
 
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod));
     EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 100), Eq(mNow + mPeriod));
@@ -642,16 +658,27 @@
 
 TEST_F(VSyncPredictorTest, vsyncTrackerCallback) {
     SET_FLAG_FOR_TEST(flags::vrr_config, true);
+
     const auto refreshRate = Fps::fromPeriodNsecs(mPeriod);
-    DisplayModeData displayModeData =
-            DisplayModeData{.renderRate = refreshRate,
-                            .notifyExpectedPresentTimeoutOpt = Period::fromNs(30)};
-    tracker.setDisplayModeData(displayModeData);
+    NotifyExpectedPresentConfig notifyExpectedPresentConfig;
+    notifyExpectedPresentConfig.notifyExpectedPresentTimeoutNs = Period::fromNs(30).ns();
+
+    hal::VrrConfig vrrConfig;
+    vrrConfig.notifyExpectedPresentConfig = notifyExpectedPresentConfig;
+    vrrConfig.minFrameIntervalNs = refreshRate.getPeriodNsecs();
+
+    const int32_t kGroup = 0;
+    const auto kResolution = ui::Size(1920, 1080);
+    const auto mode =
+            ftl::as_non_null(createVrrDisplayMode(DisplayModeId(0), refreshRate, vrrConfig, kGroup,
+                                                  kResolution, DEFAULT_DISPLAY_ID));
+
+    tracker.setDisplayModePtr(mode);
     auto last = mNow;
     for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
         EXPECT_CALL(mVsyncTrackerCallback,
-                    onVsyncGenerated(DEFAULT_DISPLAY_ID, TimePoint::fromNs(last + mPeriod),
-                                     displayModeData, Period::fromNs(mPeriod)))
+                    onVsyncGenerated(TimePoint::fromNs(last + mPeriod), mode,
+                                     FpsMatcher(refreshRate)))
                 .Times(1);
         EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(last + mPeriod));
         mNow += mPeriod;
@@ -659,14 +686,12 @@
         tracker.addVsyncTimestamp(mNow);
     }
 
-    displayModeData = DisplayModeData{.renderRate = refreshRate / 2,
-                                      .notifyExpectedPresentTimeoutOpt = Period::fromNs(30)};
-    tracker.setDisplayModeData(displayModeData);
+    tracker.setRenderRate(refreshRate / 2);
     {
         // out of render rate phase
         EXPECT_CALL(mVsyncTrackerCallback,
-                    onVsyncGenerated(DEFAULT_DISPLAY_ID, TimePoint::fromNs(mNow + 3 * mPeriod),
-                                     displayModeData, Period::fromNs(mPeriod)))
+                    onVsyncGenerated(TimePoint::fromNs(mNow + 3 * mPeriod), mode,
+                                     FpsMatcher(refreshRate / 2)))
                 .Times(1);
         EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1 * mPeriod),
                     Eq(mNow + 3 * mPeriod));
diff --git a/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp b/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp
index aca3ccc..8d9623d 100644
--- a/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncReactorTest.cpp
@@ -31,6 +31,9 @@
 
 #include <scheduler/TimeKeeper.h>
 
+#include "mock/DisplayHardware/MockDisplayMode.h"
+#include "mock/MockVSyncTracker.h"
+
 #include "Scheduler/VSyncDispatch.h"
 #include "Scheduler/VSyncReactor.h"
 #include "Scheduler/VSyncTracker.h"
@@ -40,20 +43,7 @@
 
 namespace android::scheduler {
 
-class MockVSyncTracker : public VSyncTracker {
-public:
-    MockVSyncTracker() { ON_CALL(*this, addVsyncTimestamp(_)).WillByDefault(Return(true)); }
-    MOCK_METHOD1(addVsyncTimestamp, bool(nsecs_t));
-    MOCK_CONST_METHOD1(nextAnticipatedVSyncTimeFrom, nsecs_t(nsecs_t));
-    MOCK_CONST_METHOD0(currentPeriod, nsecs_t());
-    MOCK_METHOD1(setPeriod, void(nsecs_t));
-    MOCK_METHOD0(resetModel, void());
-    MOCK_CONST_METHOD0(needsMoreSamples, bool());
-    MOCK_CONST_METHOD2(isVSyncInPhase, bool(nsecs_t, Fps));
-    MOCK_METHOD(void, setDisplayModeData, (const DisplayModeData&), (override));
-    MOCK_CONST_METHOD1(dump, void(std::string&));
-};
-
+namespace {
 class MockClock : public Clock {
 public:
     MOCK_CONST_METHOD0(now, nsecs_t());
@@ -93,18 +83,33 @@
 
 constexpr PhysicalDisplayId DEFAULT_DISPLAY_ID = PhysicalDisplayId::fromPort(42u);
 
+ftl::NonNull<DisplayModePtr> displayMode(nsecs_t vsyncPeriod) {
+    const int32_t kGroup = 0;
+    const auto kResolution = ui::Size(1920, 1080);
+    const auto refreshRate = Fps::fromPeriodNsecs(vsyncPeriod);
+    return ftl::as_non_null(mock::createDisplayMode(DisplayModeId(0), refreshRate, kGroup,
+                                                    kResolution, DEFAULT_DISPLAY_ID));
+}
+
+MATCHER_P(DisplayModeMatcher, value, "display mode equals") {
+    return arg->getId() == value->getId() && equalsExceptDisplayModeId(*arg, *value);
+}
+
+} // namespace
+
 class VSyncReactorTest : public testing::Test {
 protected:
     VSyncReactorTest()
-          : mMockTracker(std::make_shared<NiceMock<MockVSyncTracker>>()),
+          : mMockTracker(std::make_shared<NiceMock<mock::VSyncTracker>>()),
             mMockClock(std::make_shared<NiceMock<MockClock>>()),
             mReactor(DEFAULT_DISPLAY_ID, std::make_unique<ClockWrapper>(mMockClock), *mMockTracker,
                      kPendingLimit, false /* supportKernelIdleTimer */) {
         ON_CALL(*mMockClock, now()).WillByDefault(Return(mFakeNow));
         ON_CALL(*mMockTracker, currentPeriod()).WillByDefault(Return(period));
+        ON_CALL(*mMockTracker, addVsyncTimestamp(_)).WillByDefault(Return(true));
     }
 
-    std::shared_ptr<MockVSyncTracker> mMockTracker;
+    std::shared_ptr<mock::VSyncTracker> mMockTracker;
     std::shared_ptr<MockClock> mMockClock;
     static constexpr size_t kPendingLimit = 3;
     static constexpr nsecs_t mDummyTime = 47;
@@ -194,7 +199,8 @@
     mReactor.setIgnorePresentFences(true);
 
     nsecs_t const newPeriod = 5000;
-    mReactor.startPeriodTransition(newPeriod, false);
+
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(0, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
@@ -206,8 +212,8 @@
 
 TEST_F(VSyncReactorTest, setPeriodCalledOnceConfirmedChange) {
     nsecs_t const newPeriod = 5000;
-    EXPECT_CALL(*mMockTracker, setPeriod(_)).Times(0);
-    mReactor.startPeriodTransition(newPeriod, false);
+    EXPECT_CALL(*mMockTracker, setDisplayModePtr(_)).Times(0);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     bool periodFlushed = true;
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(10000, std::nullopt, &periodFlushed));
@@ -217,7 +223,7 @@
     EXPECT_FALSE(periodFlushed);
 
     Mock::VerifyAndClearExpectations(mMockTracker.get());
-    EXPECT_CALL(*mMockTracker, setPeriod(newPeriod)).Times(1);
+    EXPECT_CALL(*mMockTracker, setDisplayModePtr(/*displayMode(newPeriod)*/ _)).Times(1);
 
     EXPECT_FALSE(mReactor.addHwVsyncTimestamp(25000, std::nullopt, &periodFlushed));
     EXPECT_TRUE(periodFlushed);
@@ -226,7 +232,7 @@
 TEST_F(VSyncReactorTest, changingPeriodBackAbortsConfirmationProcess) {
     nsecs_t sampleTime = 0;
     nsecs_t const newPeriod = 5000;
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
     bool periodFlushed = true;
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(sampleTime += period, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
@@ -234,7 +240,7 @@
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(sampleTime += period, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
 
-    mReactor.startPeriodTransition(period, false);
+    mReactor.onDisplayModeChanged(displayMode(period), false);
     EXPECT_FALSE(mReactor.addHwVsyncTimestamp(sampleTime += period, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
 }
@@ -244,13 +250,13 @@
     nsecs_t const secondPeriod = 5000;
     nsecs_t const thirdPeriod = 2000;
 
-    mReactor.startPeriodTransition(secondPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(secondPeriod), false);
     bool periodFlushed = true;
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(sampleTime += period, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(sampleTime += period, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
-    mReactor.startPeriodTransition(thirdPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(thirdPeriod), false);
     EXPECT_TRUE(
             mReactor.addHwVsyncTimestamp(sampleTime += secondPeriod, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
@@ -291,21 +297,22 @@
 
 TEST_F(VSyncReactorTest, presentFenceAdditionDoesNotInterruptConfirmationProcess) {
     nsecs_t const newPeriod = 5000;
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
     EXPECT_TRUE(mReactor.addPresentFence(generateSignalledFenceWithTime(0)));
 }
 
 TEST_F(VSyncReactorTest, setPeriodCalledFirstTwoEventsNewPeriod) {
     nsecs_t const newPeriod = 5000;
-    EXPECT_CALL(*mMockTracker, setPeriod(_)).Times(0);
-    mReactor.startPeriodTransition(newPeriod, false);
+    EXPECT_CALL(*mMockTracker, setDisplayModePtr(_)).Times(0);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     bool periodFlushed = true;
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(5000, std::nullopt, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
     Mock::VerifyAndClearExpectations(mMockTracker.get());
 
-    EXPECT_CALL(*mMockTracker, setPeriod(newPeriod)).Times(1);
+    EXPECT_CALL(*mMockTracker, setDisplayModePtr(DisplayModeMatcher(displayMode(newPeriod))))
+            .Times(1);
     EXPECT_FALSE(mReactor.addHwVsyncTimestamp(10000, std::nullopt, &periodFlushed));
     EXPECT_TRUE(periodFlushed);
 }
@@ -323,7 +330,7 @@
     bool periodFlushed = false;
     nsecs_t const newPeriod = 4000;
 
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     auto time = 0;
     auto constexpr numTimestampSubmissions = 10;
@@ -348,7 +355,7 @@
     bool periodFlushed = false;
     nsecs_t const newPeriod = 4000;
 
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     auto time = 0;
     // If the power mode is not DOZE or DOZE_SUSPEND, it is still collecting timestamps.
@@ -365,7 +372,7 @@
     auto time = 0;
     bool periodFlushed = false;
     nsecs_t const newPeriod = 4000;
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     time += period;
     mReactor.addHwVsyncTimestamp(time, std::nullopt, &periodFlushed);
@@ -381,7 +388,7 @@
     auto time = 0;
     bool periodFlushed = false;
     nsecs_t const newPeriod = 4000;
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     static auto constexpr numSamplesWithNewPeriod = 4;
     Sequence seq;
@@ -408,7 +415,7 @@
     auto time = 0;
     bool periodFlushed = false;
     nsecs_t const newPeriod = 4000;
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     Sequence seq;
     EXPECT_CALL(*mMockTracker, needsMoreSamples())
@@ -428,7 +435,7 @@
     nsecs_t const newPeriod1 = 4000;
     nsecs_t const newPeriod2 = 7000;
 
-    mReactor.startPeriodTransition(newPeriod1, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod1), false);
 
     Sequence seq;
     EXPECT_CALL(*mMockTracker, needsMoreSamples())
@@ -447,7 +454,7 @@
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(time += newPeriod1, std::nullopt, &periodFlushed));
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(time += newPeriod1, std::nullopt, &periodFlushed));
 
-    mReactor.startPeriodTransition(newPeriod2, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod2), false);
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(time += newPeriod1, std::nullopt, &periodFlushed));
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(time += newPeriod2, std::nullopt, &periodFlushed));
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(time += newPeriod2, std::nullopt, &periodFlushed));
@@ -460,7 +467,7 @@
     mReactor.setIgnorePresentFences(true);
 
     nsecs_t const newPeriod = 5000;
-    mReactor.startPeriodTransition(newPeriod, false);
+    mReactor.onDisplayModeChanged(displayMode(newPeriod), false);
 
     EXPECT_TRUE(mReactor.addHwVsyncTimestamp(0, 0, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
@@ -484,7 +491,7 @@
 
     // First, set the same period, which should only be confirmed when we receive two
     // matching callbacks
-    idleReactor.startPeriodTransition(10000, false);
+    idleReactor.onDisplayModeChanged(displayMode(10000), false);
     EXPECT_TRUE(idleReactor.addHwVsyncTimestamp(0, 0, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
     // Correct period but incorrect timestamp delta
@@ -497,7 +504,7 @@
     // Then, set a new period, which should be confirmed as soon as we receive a callback
     // reporting the new period
     nsecs_t const newPeriod = 5000;
-    idleReactor.startPeriodTransition(newPeriod, false);
+    idleReactor.onDisplayModeChanged(displayMode(newPeriod), false);
     // Incorrect timestamp delta and period
     EXPECT_TRUE(idleReactor.addHwVsyncTimestamp(20000, 10000, &periodFlushed));
     EXPECT_FALSE(periodFlushed);
diff --git a/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp b/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp
index a8a3cd0..bfdd596 100644
--- a/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp
@@ -25,10 +25,12 @@
 #include <scheduler/Fps.h>
 #include "Scheduler/VsyncSchedule.h"
 #include "ThreadContext.h"
+#include "mock/DisplayHardware/MockDisplayMode.h"
 #include "mock/MockVSyncDispatch.h"
 #include "mock/MockVSyncTracker.h"
 #include "mock/MockVsyncController.h"
 
+using android::mock::createDisplayMode;
 using testing::_;
 
 namespace android {
@@ -157,35 +159,35 @@
     // allowed.
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
 
-    const Period period = (60_Hz).getPeriod();
+    const auto mode = ftl::as_non_null(createDisplayMode(DisplayModeId(0), 60_Hz));
 
     EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
-    EXPECT_CALL(getController(), startPeriodTransition(period.ns(), false));
+    EXPECT_CALL(getController(), onDisplayModeChanged(mode, false));
 
-    mVsyncSchedule->startPeriodTransition(period, false);
+    mVsyncSchedule->onDisplayModeChanged(mode, false);
 }
 
 TEST_F(VsyncScheduleTest, StartPeriodTransitionAlreadyEnabled) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
     mVsyncSchedule->enableHardwareVsync();
 
-    const Period period = (60_Hz).getPeriod();
+    const auto mode = ftl::as_non_null(createDisplayMode(DisplayModeId(0), 60_Hz));
 
     EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
-    EXPECT_CALL(getController(), startPeriodTransition(period.ns(), false));
+    EXPECT_CALL(getController(), onDisplayModeChanged(mode, false));
 
-    mVsyncSchedule->startPeriodTransition(period, false);
+    mVsyncSchedule->onDisplayModeChanged(mode, false);
 }
 
 TEST_F(VsyncScheduleTest, StartPeriodTransitionForce) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
 
-    const Period period = (60_Hz).getPeriod();
+    const auto mode = ftl::as_non_null(createDisplayMode(DisplayModeId(0), 60_Hz));
 
     EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
-    EXPECT_CALL(getController(), startPeriodTransition(period.ns(), true));
+    EXPECT_CALL(getController(), onDisplayModeChanged(mode, true));
 
-    mVsyncSchedule->startPeriodTransition(period, true);
+    mVsyncSchedule->onDisplayModeChanged(mode, true);
 }
 
 TEST_F(VsyncScheduleTest, AddResyncSampleDisallowed) {
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h
index cb05c00..5bcce50 100644
--- a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockDisplayMode.h
@@ -52,6 +52,7 @@
             .setVrrConfig(std::move(vrrConfig))
             .build();
 }
+
 inline DisplayModePtr cloneForDisplay(PhysicalDisplayId displayId, const DisplayModePtr& modePtr) {
     return DisplayMode::Builder(modePtr->getHwcId())
             .setId(modePtr->getId())
diff --git a/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h b/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h
index 31eb86e..ec22b70 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockVSyncTracker.h
@@ -27,15 +27,15 @@
     VSyncTracker();
     ~VSyncTracker() override;
 
-    MOCK_METHOD1(addVsyncTimestamp, bool(nsecs_t));
-    MOCK_CONST_METHOD1(nextAnticipatedVSyncTimeFrom, nsecs_t(nsecs_t));
-    MOCK_CONST_METHOD0(currentPeriod, nsecs_t());
-    MOCK_METHOD1(setPeriod, void(nsecs_t));
-    MOCK_METHOD0(resetModel, void());
-    MOCK_CONST_METHOD0(needsMoreSamples, bool());
-    MOCK_CONST_METHOD2(isVSyncInPhase, bool(nsecs_t, Fps));
-    MOCK_METHOD(void, setDisplayModeData, (const scheduler::DisplayModeData&), (override));
-    MOCK_CONST_METHOD1(dump, void(std::string&));
+    MOCK_METHOD(bool, addVsyncTimestamp, (nsecs_t), (override));
+    MOCK_METHOD(nsecs_t, nextAnticipatedVSyncTimeFrom, (nsecs_t), (const, override));
+    MOCK_METHOD(nsecs_t, currentPeriod, (), (const, override));
+    MOCK_METHOD(void, resetModel, (), (override));
+    MOCK_METHOD(bool, needsMoreSamples, (), (const, override));
+    MOCK_METHOD(bool, isVSyncInPhase, (nsecs_t, Fps), (const, override));
+    MOCK_METHOD(void, setDisplayModePtr, (ftl::NonNull<DisplayModePtr>), (override));
+    MOCK_METHOD(void, setRenderRate, (Fps), (override));
+    MOCK_METHOD(void, dump, (std::string&), (const, override));
 };
 
 } // namespace android::mock
diff --git a/services/surfaceflinger/tests/unittests/mock/MockVsyncController.h b/services/surfaceflinger/tests/unittests/mock/MockVsyncController.h
index 69ec60a..f743390 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockVsyncController.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockVsyncController.h
@@ -29,7 +29,7 @@
 
     MOCK_METHOD(bool, addPresentFence, (std::shared_ptr<FenceTime>), (override));
     MOCK_METHOD(bool, addHwVsyncTimestamp, (nsecs_t, std::optional<nsecs_t>, bool*), (override));
-    MOCK_METHOD(void, startPeriodTransition, (nsecs_t, bool), (override));
+    MOCK_METHOD(void, onDisplayModeChanged, (ftl::NonNull<DisplayModePtr>, bool), (override));
     MOCK_METHOD(void, setIgnorePresentFences, (bool), (override));
     MOCK_METHOD(void, setDisplayPowerMode, (hal::PowerMode), (override));
 
diff --git a/services/surfaceflinger/tests/unittests/mock/MockVsyncTrackerCallback.h b/services/surfaceflinger/tests/unittests/mock/MockVsyncTrackerCallback.h
index b8e24e0..b48529f 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockVsyncTrackerCallback.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockVsyncTrackerCallback.h
@@ -23,13 +23,10 @@
 namespace android::scheduler::mock {
 
 struct VsyncTrackerCallback final : IVsyncTrackerCallback {
-    MOCK_METHOD(void, onVsyncGenerated,
-                (PhysicalDisplayId, TimePoint, const scheduler::DisplayModeData&, Period),
-                (override));
+    MOCK_METHOD(void, onVsyncGenerated, (TimePoint, ftl::NonNull<DisplayModePtr>, Fps), (override));
 };
 
 struct NoOpVsyncTrackerCallback final : IVsyncTrackerCallback {
-    void onVsyncGenerated(PhysicalDisplayId, TimePoint, const scheduler::DisplayModeData&,
-                          Period) override{};
+    void onVsyncGenerated(TimePoint, ftl::NonNull<DisplayModePtr>, Fps) override{};
 };
 } // namespace android::scheduler::mock