diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
index 81a669a..011229e 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
@@ -22,6 +22,7 @@
 #pragma clang diagnostic ignored "-Wextra"
 
 #include "RefreshRateConfigs.h"
+#include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <utils/Trace.h>
 #include <chrono>
@@ -679,9 +680,34 @@
 RefreshRateConfigs::RefreshRateConfigs(const DisplayModes& modes, DisplayModeId currentModeId,
                                        Config config)
       : mKnownFrameRates(constructKnownFrameRates(modes)), mConfig(config) {
+    initializeIdleTimer();
     updateDisplayModes(modes, currentModeId);
 }
 
+void RefreshRateConfigs::initializeIdleTimer() {
+    const int setIdleTimerMs = base::GetIntProperty("debug.sf.set_idle_timer_ms", 0);
+
+    if (const auto millis = setIdleTimerMs ? setIdleTimerMs : sysprop::set_idle_timer_ms(0);
+        millis > 0) {
+        const auto getCallback = [this]() -> std::optional<IdleTimerCallbacks::Callbacks> {
+            std::scoped_lock lock(mIdleTimerCallbacksMutex);
+            if (!mIdleTimerCallbacks.has_value()) return {};
+            return mConfig.supportKernelTimer ? mIdleTimerCallbacks->kernel
+                                              : mIdleTimerCallbacks->platform;
+        };
+
+        mIdleTimer.emplace(
+                "IdleTimer", std::chrono::milliseconds(millis),
+                [getCallback] {
+                    if (const auto callback = getCallback()) callback->onReset();
+                },
+                [getCallback] {
+                    if (const auto callback = getCallback()) callback->onExpired();
+                });
+        mIdleTimer->start();
+    }
+}
+
 void RefreshRateConfigs::updateDisplayModes(const DisplayModes& modes,
                                             DisplayModeId currentModeId) {
     std::lock_guard lock(mLock);
@@ -944,6 +970,8 @@
 
     base::StringAppendF(&result, "Supports Frame Rate Override: %s\n",
                         mSupportsFrameRateOverride ? "yes" : "no");
+    base::StringAppendF(&result, "Idle timer: %s\n",
+                        mIdleTimer ? mIdleTimer->dump().c_str() : "off");
     result.append("\n");
 }
 
diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
index 4a9a1fd..0f0fe22 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
@@ -27,6 +27,7 @@
 #include "DisplayHardware/DisplayMode.h"
 #include "DisplayHardware/HWComposer.h"
 #include "Fps.h"
+#include "Scheduler/OneShotTimer.h"
 #include "Scheduler/SchedulerUtils.h"
 #include "Scheduler/Seamlessness.h"
 #include "Scheduler/StrongTyping.h"
@@ -305,11 +306,15 @@
         // or heuristic, such that refresh rates higher than this value will not be voted for. 0 if
         // no threshold is set.
         int frameRateMultipleThreshold = 0;
+
+        // Whether to use idle timer callbacks that support the kernel timer.
+        bool supportKernelTimer = false;
     };
 
     RefreshRateConfigs(const DisplayModes& modes, DisplayModeId currentModeId,
                        Config config = {.enableFrameRateOverride = false,
-                                        .frameRateMultipleThreshold = 0});
+                                        .frameRateMultipleThreshold = 0,
+                                        .supportKernelTimer = false});
 
     // Returns whether switching modes (refresh rate or resolution) is possible.
     // TODO(b/158780872): Consider HAL support, and skip frame rate detection if the modes only
@@ -345,6 +350,30 @@
                                                  Fps displayFrameRate, bool touch) const
             EXCLUDES(mLock);
 
+    bool supportsKernelIdleTimer() const { return mConfig.supportKernelTimer; }
+
+    void setIdleTimerCallbacks(std::function<void()> platformTimerReset,
+                               std::function<void()> platformTimerExpired,
+                               std::function<void()> kernelTimerReset,
+                               std::function<void()> kernelTimerExpired) {
+        std::scoped_lock lock(mIdleTimerCallbacksMutex);
+        mIdleTimerCallbacks.emplace();
+        mIdleTimerCallbacks->platform.onReset = platformTimerReset;
+        mIdleTimerCallbacks->platform.onExpired = platformTimerExpired;
+        mIdleTimerCallbacks->kernel.onReset = kernelTimerReset;
+        mIdleTimerCallbacks->kernel.onExpired = kernelTimerExpired;
+    }
+
+    void resetIdleTimer(bool kernelOnly) {
+        if (!mIdleTimer) {
+            return;
+        }
+        if (kernelOnly && !mConfig.supportKernelTimer) {
+            return;
+        }
+        mIdleTimer->reset();
+    };
+
     void dump(std::string& result) const EXCLUDES(mLock);
 
     RefreshRateConfigs(const RefreshRateConfigs&) = delete;
@@ -403,6 +432,8 @@
 
     void updateDisplayModes(const DisplayModes& mode, DisplayModeId currentModeId) EXCLUDES(mLock);
 
+    void initializeIdleTimer();
+
     // The list of refresh rates, indexed by display modes ID. This may change after this
     // object is initialized.
     AllRefreshRatesMapType mRefreshRates GUARDED_BY(mLock);
@@ -446,6 +477,22 @@
     };
     mutable std::optional<GetBestRefreshRateInvocation> lastBestRefreshRateInvocation
             GUARDED_BY(mLock);
+
+    // Timer that records time between requests for next vsync.
+    std::optional<scheduler::OneShotTimer> mIdleTimer;
+
+    struct IdleTimerCallbacks {
+        struct Callbacks {
+            std::function<void()> onReset;
+            std::function<void()> onExpired;
+        };
+
+        Callbacks platform;
+        Callbacks kernel;
+    };
+
+    std::mutex mIdleTimerCallbacksMutex;
+    std::optional<IdleTimerCallbacks> mIdleTimerCallbacks GUARDED_BY(mIdleTimerCallbacksMutex);
 };
 
 } // namespace android::scheduler
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 80b2504..1a5f0f4 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -120,28 +120,15 @@
 Scheduler::Scheduler(const std::shared_ptr<scheduler::RefreshRateConfigs>& configs,
                      ISchedulerCallback& callback)
       : Scheduler(configs, callback,
-                  {.supportKernelTimer = sysprop::support_kernel_idle_timer(false),
-                   .useContentDetection = sysprop::use_content_detection_for_refresh_rate(false)}) {
+                  {.useContentDetection = sysprop::use_content_detection_for_refresh_rate(false)}) {
 }
 
 Scheduler::Scheduler(const std::shared_ptr<scheduler::RefreshRateConfigs>& configs,
                      ISchedulerCallback& callback, Options options)
-      : Scheduler(createVsyncSchedule(options.supportKernelTimer), configs, callback,
+      : Scheduler(createVsyncSchedule(configs->supportsKernelIdleTimer()), configs, callback,
                   createLayerHistory(), options) {
     using namespace sysprop;
 
-    const int setIdleTimerMs = base::GetIntProperty("debug.sf.set_idle_timer_ms"s, 0);
-
-    if (const auto millis = setIdleTimerMs ? setIdleTimerMs : set_idle_timer_ms(0); millis > 0) {
-        const auto callback = mOptions.supportKernelTimer ? &Scheduler::kernelIdleTimerCallback
-                                                          : &Scheduler::idleTimerCallback;
-        mIdleTimer.emplace(
-                "IdleTimer", std::chrono::milliseconds(millis),
-                [this, callback] { std::invoke(callback, this, TimerState::Reset); },
-                [this, callback] { std::invoke(callback, this, TimerState::Expired); });
-        mIdleTimer->start();
-    }
-
     if (const int64_t millis = set_touch_timer_ms(0); millis > 0) {
         // Touch events are coming to SF every 100ms, so the timer needs to be higher than that
         mTouchTimer.emplace(
@@ -168,11 +155,11 @@
         mVsyncSchedule(std::move(schedule)),
         mLayerHistory(std::move(layerHistory)),
         mSchedulerCallback(schedulerCallback),
-        mRefreshRateConfigs(configs),
         mPredictedVsyncTracer(
                 base::GetBoolProperty("debug.sf.show_predicted_vsync", false)
                         ? std::make_unique<PredictedVsyncTracer>(*mVsyncSchedule.dispatch)
                         : nullptr) {
+    setRefreshRateConfigs(configs);
     mSchedulerCallback.setVsyncEnabled(false);
 }
 
@@ -180,7 +167,7 @@
     // Ensure the OneShotTimer threads are joined before we start destroying state.
     mDisplayPowerTimer.reset();
     mTouchTimer.reset();
-    mIdleTimer.reset();
+    mRefreshRateConfigs.reset();
 }
 
 Scheduler::VsyncSchedule Scheduler::createVsyncSchedule(bool supportKernelTimer) {
@@ -672,18 +659,16 @@
 }
 
 void Scheduler::resetIdleTimer() {
-    if (mIdleTimer) {
-        mIdleTimer->reset();
-    }
+    std::scoped_lock lock(mRefreshRateConfigsLock);
+    mRefreshRateConfigs->resetIdleTimer(/*kernelOnly*/ false);
 }
 
 void Scheduler::notifyTouchEvent() {
     if (mTouchTimer) {
         mTouchTimer->reset();
 
-        if (mOptions.supportKernelTimer && mIdleTimer) {
-            mIdleTimer->reset();
-        }
+        std::scoped_lock lock(mRefreshRateConfigsLock);
+        mRefreshRateConfigs->resetIdleTimer(/*kernelOnly*/ true);
     }
 }
 
@@ -755,7 +740,6 @@
 void Scheduler::dump(std::string& result) const {
     using base::StringAppendF;
 
-    StringAppendF(&result, "+  Idle timer: %s\n", mIdleTimer ? mIdleTimer->dump().c_str() : "off");
     StringAppendF(&result, "+  Touch timer: %s\n",
                   mTouchTimer ? mTouchTimer->dump().c_str() : "off");
     StringAppendF(&result, "+  Content detection: %s %s\n\n",
@@ -867,7 +851,7 @@
     }
 
     const bool touchActive = mTouchTimer && mFeatures.touch == TouchState::Active;
-    const bool idle = mIdleTimer && mFeatures.idleTimer == TimerState::Expired;
+    const bool idle = mFeatures.idleTimer == TimerState::Expired;
 
     return refreshRateConfigs
             ->getBestRefreshRate(mFeatures.contentRequirements,
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 4b6905b..2f97328 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -133,7 +133,6 @@
     // Detects content using layer history, and selects a matching refresh rate.
     void chooseRefreshRateForContent() EXCLUDES(mRefreshRateConfigsLock);
 
-    bool isIdleTimerEnabled() const { return mIdleTimer.has_value(); }
     void resetIdleTimer();
 
     // Function that resets the touch timer.
@@ -184,6 +183,15 @@
             EXCLUDES(mRefreshRateConfigsLock) {
         std::scoped_lock lock(mRefreshRateConfigsLock);
         mRefreshRateConfigs = std::move(refreshRateConfigs);
+        mRefreshRateConfigs->setIdleTimerCallbacks(
+                [this] { std::invoke(&Scheduler::idleTimerCallback, this, TimerState::Reset); },
+                [this] { std::invoke(&Scheduler::idleTimerCallback, this, TimerState::Expired); },
+                [this] {
+                    std::invoke(&Scheduler::kernelIdleTimerCallback, this, TimerState::Reset);
+                },
+                [this] {
+                    std::invoke(&Scheduler::kernelIdleTimerCallback, this, TimerState::Expired);
+                });
     }
 
     nsecs_t getVsyncPeriodFromRefreshRateConfigs() const EXCLUDES(mRefreshRateConfigsLock) {
@@ -201,8 +209,6 @@
     enum class TouchState { Inactive, Active };
 
     struct Options {
-        // Whether to use idle timer callbacks that support the kernel timer.
-        bool supportKernelTimer;
         // Whether to use content detection at all.
         bool useContentDetection;
     };
@@ -288,8 +294,6 @@
     // Used to choose refresh rate if content detection is enabled.
     std::unique_ptr<LayerHistory> mLayerHistory;
 
-    // Timer that records time between requests for next vsync.
-    std::optional<scheduler::OneShotTimer> mIdleTimer;
     // Timer used to monitor touch events.
     std::optional<scheduler::OneShotTimer> mTouchTimer;
     // Timer used to monitor display power mode.
diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.cpp b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
index 7b5d462..ee973f7 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
@@ -42,6 +42,7 @@
       : mClock(std::move(clock)),
         mTracker(tracker),
         mPendingLimit(pendingFenceLimit),
+        // TODO(adyabr): change mSupportKernelIdleTimer when the active display changes
         mSupportKernelIdleTimer(supportKernelIdleTimer) {}
 
 VSyncReactor::~VSyncReactor() = default;