diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 55705ca..1b0d892 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -103,12 +103,12 @@
         "SurfaceFlinger_DisplayModeSwitching.cpp",
         "SurfaceFlinger_DisplayTransactionCommitTest.cpp",
         "SurfaceFlinger_ExcludeDolbyVisionTest.cpp",
+        "SurfaceFlinger_FoldableTest.cpp",
         "SurfaceFlinger_GetDisplayNativePrimariesTest.cpp",
         "SurfaceFlinger_GetDisplayStatsTest.cpp",
         "SurfaceFlinger_HdrOutputControlTest.cpp",
         "SurfaceFlinger_HotplugTest.cpp",
         "SurfaceFlinger_InitializeDisplaysTest.cpp",
-        "SurfaceFlinger_MultiDisplayPacesetterTest.cpp",
         "SurfaceFlinger_NotifyPowerBoostTest.cpp",
         "SurfaceFlinger_PowerHintTest.cpp",
         "SurfaceFlinger_SetDisplayStateTest.cpp",
diff --git a/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h b/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h
index e64cb38..ee12276 100644
--- a/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h
+++ b/services/surfaceflinger/tests/unittests/DisplayTransactionTestHelpers.h
@@ -371,10 +371,11 @@
     // Called by tests to inject a HWC display setup
     template <bool kInitPowerMode = true>
     static void injectHwcDisplay(DisplayTransactionTest* test) {
-        EXPECT_CALL(*test->mComposer, getDisplayCapabilities(HWC_DISPLAY_ID, _))
-                .WillOnce(DoAll(SetArgPointee<1>(std::vector<DisplayCapability>({})),
-                                Return(Error::NONE)));
         if constexpr (kInitPowerMode) {
+            EXPECT_CALL(*test->mComposer, getDisplayCapabilities(HWC_DISPLAY_ID, _))
+                    .WillOnce(DoAll(SetArgPointee<1>(std::vector<DisplayCapability>({})),
+                                    Return(Error::NONE)));
+
             EXPECT_CALL(*test->mComposer, setPowerMode(HWC_DISPLAY_ID, INIT_POWER_MODE))
                     .WillOnce(Return(Error::NONE));
         }
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index 16fa35e..682c998 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -155,16 +155,20 @@
     EXPECT_EQ(kEventConnections, mScheduler->getEventThreadConnectionCount(mConnectionHandle));
 }
 
-TEST_F(SchedulerTest, registerDisplay) {
+TEST_F(SchedulerTest, registerDisplay) FTL_FAKE_GUARD(kMainThreadContext) {
     // Hardware VSYNC should not change if the display is already registered.
-    EXPECT_CALL(mSchedulerCallback, setVsyncEnabled(kDisplayId1, false)).Times(0);
+    EXPECT_CALL(mSchedulerCallback, requestHardwareVsync(kDisplayId1, false)).Times(0);
     mScheduler->registerDisplay(kDisplayId1,
                                 std::make_shared<RefreshRateSelector>(kDisplay1Modes,
                                                                       kDisplay1Mode60->getId()));
 
+    // TODO(b/241285191): Restore once VsyncSchedule::getPendingHardwareVsyncState is called by
+    // Scheduler::setDisplayPowerMode rather than SF::setPowerModeInternal.
+#if 0
     // Hardware VSYNC should be disabled for newly registered displays.
-    EXPECT_CALL(mSchedulerCallback, setVsyncEnabled(kDisplayId2, false)).Times(1);
-    EXPECT_CALL(mSchedulerCallback, setVsyncEnabled(kDisplayId3, false)).Times(1);
+    EXPECT_CALL(mSchedulerCallback, requestHardwareVsync(kDisplayId2, false)).Times(1);
+    EXPECT_CALL(mSchedulerCallback, requestHardwareVsync(kDisplayId3, false)).Times(1);
+#endif
 
     mScheduler->registerDisplay(kDisplayId2,
                                 std::make_shared<RefreshRateSelector>(kDisplay2Modes,
@@ -172,6 +176,10 @@
     mScheduler->registerDisplay(kDisplayId3,
                                 std::make_shared<RefreshRateSelector>(kDisplay3Modes,
                                                                       kDisplay3Mode60->getId()));
+
+    EXPECT_FALSE(mScheduler->getVsyncSchedule(kDisplayId1)->getPendingHardwareVsyncState());
+    EXPECT_FALSE(mScheduler->getVsyncSchedule(kDisplayId2)->getPendingHardwareVsyncState());
+    EXPECT_FALSE(mScheduler->getVsyncSchedule(kDisplayId3)->getPendingHardwareVsyncState());
 }
 
 TEST_F(SchedulerTest, chooseRefreshRateForContentIsNoopWhenModeSwitchingIsNotSupported) {
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_FoldableTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_FoldableTest.cpp
new file mode 100644
index 0000000..bd2344c
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_FoldableTest.cpp
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "LibSurfaceFlingerUnittests"
+
+#include "DisplayTransactionTestHelpers.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace android {
+namespace {
+
+struct FoldableTest : DisplayTransactionTest {
+    static constexpr bool kWithMockScheduler = false;
+    FoldableTest() : DisplayTransactionTest(kWithMockScheduler) {}
+
+    void SetUp() override {
+        injectMockScheduler(kInnerDisplayId);
+
+        // Inject inner and outer displays with uninitialized power modes.
+        constexpr bool kInitPowerMode = false;
+        {
+            InnerDisplayVariant::injectHwcDisplay<kInitPowerMode>(this);
+            auto injector = InnerDisplayVariant::makeFakeExistingDisplayInjector(this);
+            injector.setPowerMode(std::nullopt);
+            injector.setRefreshRateSelector(mFlinger.scheduler()->refreshRateSelector());
+            mInnerDisplay = injector.inject();
+        }
+        {
+            OuterDisplayVariant::injectHwcDisplay<kInitPowerMode>(this);
+            auto injector = OuterDisplayVariant::makeFakeExistingDisplayInjector(this);
+            injector.setPowerMode(std::nullopt);
+            mOuterDisplay = injector.inject();
+        }
+    }
+
+    static inline PhysicalDisplayId kInnerDisplayId = InnerDisplayVariant::DISPLAY_ID::get();
+    static inline PhysicalDisplayId kOuterDisplayId = OuterDisplayVariant::DISPLAY_ID::get();
+
+    sp<DisplayDevice> mInnerDisplay, mOuterDisplay;
+};
+
+TEST_F(FoldableTest, foldUnfold) {
+    // When the device boots, the inner display should be the pacesetter.
+    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), kInnerDisplayId);
+
+    // ...and should still be after powering on.
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::ON);
+    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), kInnerDisplayId);
+
+    // The outer display should become the pacesetter after folding.
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::OFF);
+    mFlinger.setPowerModeInternal(mOuterDisplay, PowerMode::ON);
+    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), kOuterDisplayId);
+
+    // The inner display should become the pacesetter after unfolding.
+    mFlinger.setPowerModeInternal(mOuterDisplay, PowerMode::OFF);
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::ON);
+    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), kInnerDisplayId);
+
+    // The inner display should stay the pacesetter if both are powered on.
+    // TODO(b/255635821): The pacesetter should depend on the displays' refresh rates.
+    mFlinger.setPowerModeInternal(mOuterDisplay, PowerMode::ON);
+    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), kInnerDisplayId);
+
+    // The outer display should become the pacesetter if designated.
+    mFlinger.scheduler()->setPacesetterDisplay(kOuterDisplayId);
+    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), kOuterDisplayId);
+}
+
+TEST_F(FoldableTest, doesNotRequestHardwareVsyncIfPoweredOff) {
+    // Both displays are powered off.
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kInnerDisplayId, _))
+            .Times(0);
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kOuterDisplayId, _))
+            .Times(0);
+
+    EXPECT_FALSE(mInnerDisplay->isPoweredOn());
+    EXPECT_FALSE(mOuterDisplay->isPoweredOn());
+
+    auto& scheduler = *mFlinger.scheduler();
+    scheduler.onHardwareVsyncRequest(kInnerDisplayId, true);
+    scheduler.onHardwareVsyncRequest(kOuterDisplayId, true);
+}
+
+TEST_F(FoldableTest, requestsHardwareVsyncForInnerDisplay) {
+    // Only inner display is powered on.
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kInnerDisplayId, true))
+            .Times(1);
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kOuterDisplayId, _))
+            .Times(0);
+
+    // The injected VsyncSchedule uses TestableScheduler::mockRequestHardwareVsync, so no calls to
+    // ISchedulerCallback::requestHardwareVsync are expected during setPowerModeInternal.
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::ON);
+
+    EXPECT_TRUE(mInnerDisplay->isPoweredOn());
+    EXPECT_FALSE(mOuterDisplay->isPoweredOn());
+
+    auto& scheduler = *mFlinger.scheduler();
+    scheduler.onHardwareVsyncRequest(kInnerDisplayId, true);
+    scheduler.onHardwareVsyncRequest(kOuterDisplayId, true);
+}
+
+TEST_F(FoldableTest, requestsHardwareVsyncForOuterDisplay) {
+    // Only outer display is powered on.
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kInnerDisplayId, _))
+            .Times(0);
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kOuterDisplayId, true))
+            .Times(1);
+
+    // The injected VsyncSchedule uses TestableScheduler::mockRequestHardwareVsync, so no calls to
+    // ISchedulerCallback::requestHardwareVsync are expected during setPowerModeInternal.
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::ON);
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::OFF);
+    mFlinger.setPowerModeInternal(mOuterDisplay, PowerMode::ON);
+
+    EXPECT_FALSE(mInnerDisplay->isPoweredOn());
+    EXPECT_TRUE(mOuterDisplay->isPoweredOn());
+
+    auto& scheduler = *mFlinger.scheduler();
+    scheduler.onHardwareVsyncRequest(kInnerDisplayId, true);
+    scheduler.onHardwareVsyncRequest(kOuterDisplayId, true);
+}
+
+TEST_F(FoldableTest, requestsHardwareVsyncForBothDisplays) {
+    // Both displays are powered on.
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kInnerDisplayId, true))
+            .Times(1);
+    EXPECT_CALL(mFlinger.mockSchedulerCallback(), requestHardwareVsync(kOuterDisplayId, true))
+            .Times(1);
+
+    // The injected VsyncSchedule uses TestableScheduler::mockRequestHardwareVsync, so no calls to
+    // ISchedulerCallback::requestHardwareVsync are expected during setPowerModeInternal.
+    mFlinger.setPowerModeInternal(mInnerDisplay, PowerMode::ON);
+    mFlinger.setPowerModeInternal(mOuterDisplay, PowerMode::ON);
+
+    EXPECT_TRUE(mInnerDisplay->isPoweredOn());
+    EXPECT_TRUE(mOuterDisplay->isPoweredOn());
+
+    auto& scheduler = *mFlinger.scheduler();
+    scheduler.onHardwareVsyncRequest(mInnerDisplay->getPhysicalId(), true);
+    scheduler.onHardwareVsyncRequest(mOuterDisplay->getPhysicalId(), true);
+}
+
+} // namespace
+} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_MultiDisplayPacesetterTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_MultiDisplayPacesetterTest.cpp
deleted file mode 100644
index e38f56e..0000000
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_MultiDisplayPacesetterTest.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright 2023 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#undef LOG_TAG
-#define LOG_TAG "LibSurfaceFlingerUnittests"
-
-#include "DisplayTransactionTestHelpers.h"
-
-#include <gmock/gmock.h>
-#include <gtest/gtest.h>
-
-namespace android {
-namespace {
-
-struct MultiDisplayPacesetterTest : DisplayTransactionTest {
-    static constexpr bool kWithMockScheduler = false;
-    MultiDisplayPacesetterTest() : DisplayTransactionTest(kWithMockScheduler) {}
-};
-
-TEST_F(MultiDisplayPacesetterTest, foldable) {
-    injectMockScheduler(InnerDisplayVariant::DISPLAY_ID::get());
-
-    // Inject inner and outer displays with uninitialized power modes.
-    sp<DisplayDevice> innerDisplay, outerDisplay;
-    constexpr bool kInitPowerMode = false;
-    {
-        InnerDisplayVariant::injectHwcDisplay<kInitPowerMode>(this);
-        auto injector = InnerDisplayVariant::makeFakeExistingDisplayInjector(this);
-        injector.setPowerMode(std::nullopt);
-        injector.setRefreshRateSelector(mFlinger.scheduler()->refreshRateSelector());
-        innerDisplay = injector.inject();
-    }
-    {
-        OuterDisplayVariant::injectHwcDisplay<kInitPowerMode>(this);
-        auto injector = OuterDisplayVariant::makeFakeExistingDisplayInjector(this);
-        injector.setPowerMode(std::nullopt);
-        outerDisplay = injector.inject();
-    }
-
-    // When the device boots, the inner display should be the pacesetter.
-    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), innerDisplay->getPhysicalId());
-
-    // ...and should still be after powering on.
-    mFlinger.setPowerModeInternal(innerDisplay, PowerMode::ON);
-    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), innerDisplay->getPhysicalId());
-
-    // The outer display should become the pacesetter after folding.
-    mFlinger.setPowerModeInternal(innerDisplay, PowerMode::OFF);
-    mFlinger.setPowerModeInternal(outerDisplay, PowerMode::ON);
-    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), outerDisplay->getPhysicalId());
-
-    // The inner display should become the pacesetter after unfolding.
-    mFlinger.setPowerModeInternal(outerDisplay, PowerMode::OFF);
-    mFlinger.setPowerModeInternal(innerDisplay, PowerMode::ON);
-    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), innerDisplay->getPhysicalId());
-
-    // The inner display should stay the pacesetter if both are powered on.
-    // TODO(b/255635821): The pacesetter should depend on the displays' refresh rates.
-    mFlinger.setPowerModeInternal(outerDisplay, PowerMode::ON);
-    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), innerDisplay->getPhysicalId());
-
-    // The outer display should become the pacesetter if designated.
-    mFlinger.scheduler()->setPacesetterDisplay(outerDisplay->getPhysicalId());
-    ASSERT_EQ(mFlinger.scheduler()->pacesetterDisplayId(), outerDisplay->getPhysicalId());
-}
-
-} // namespace
-} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
index 7754c21..cf3fab3 100644
--- a/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_SetPowerModeInternalTest.cpp
@@ -61,7 +61,7 @@
 struct EventThreadBaseSupportedVariant {
     static void setupVsyncNoCallExpectations(DisplayTransactionTest* test) {
         // Expect no change to hardware nor synthetic VSYNC.
-        EXPECT_CALL(test->mFlinger.mockSchedulerCallback(), setVsyncEnabled(_, _)).Times(0);
+        EXPECT_CALL(test->mFlinger.scheduler()->mockRequestHardwareVsync, Call(_, _)).Times(0);
         EXPECT_CALL(*test->mEventThread, enableSyntheticVsync(_)).Times(0);
     }
 };
@@ -79,13 +79,13 @@
 struct EventThreadIsSupportedVariant : public EventThreadBaseSupportedVariant {
     static void setupEnableVsyncCallExpectations(DisplayTransactionTest* test) {
         // Expect to enable hardware VSYNC and disable synthetic VSYNC.
-        EXPECT_CALL(test->mFlinger.mockSchedulerCallback(), setVsyncEnabled(_, true)).Times(1);
+        EXPECT_CALL(test->mFlinger.scheduler()->mockRequestHardwareVsync, Call(_, true)).Times(1);
         EXPECT_CALL(*test->mEventThread, enableSyntheticVsync(false)).Times(1);
     }
 
     static void setupDisableVsyncCallExpectations(DisplayTransactionTest* test) {
         // Expect to disable hardware VSYNC and enable synthetic VSYNC.
-        EXPECT_CALL(test->mFlinger.mockSchedulerCallback(), setVsyncEnabled(_, false)).Times(1);
+        EXPECT_CALL(test->mFlinger.scheduler()->mockRequestHardwareVsync, Call(_, false)).Times(1);
         EXPECT_CALL(*test->mEventThread, enableSyntheticVsync(true)).Times(1);
     }
 };
diff --git a/services/surfaceflinger/tests/unittests/TestableScheduler.h b/services/surfaceflinger/tests/unittests/TestableScheduler.h
index 5d2dfe4..aac11c0 100644
--- a/services/surfaceflinger/tests/unittests/TestableScheduler.h
+++ b/services/surfaceflinger/tests/unittests/TestableScheduler.h
@@ -27,6 +27,7 @@
 #include "Scheduler/Scheduler.h"
 #include "Scheduler/VSyncTracker.h"
 #include "Scheduler/VsyncController.h"
+#include "Scheduler/VsyncSchedule.h"
 #include "mock/MockVSyncDispatch.h"
 #include "mock/MockVSyncTracker.h"
 #include "mock/MockVsyncController.h"
@@ -80,9 +81,13 @@
                                                    new VsyncSchedule(displayId, std::move(tracker),
                                                                      std::make_shared<
                                                                              mock::VSyncDispatch>(),
-                                                                     std::move(controller))));
+                                                                     std::move(controller),
+                                                                     mockRequestHardwareVsync
+                                                                             .AsStdFunction())));
     }
 
+    testing::MockFunction<void(PhysicalDisplayId, bool)> mockRequestHardwareVsync;
+
     void unregisterDisplay(PhysicalDisplayId displayId) {
         ftl::FakeGuard guard(kMainThreadContext);
         Scheduler::unregisterDisplay(displayId);
@@ -163,6 +168,8 @@
                                           : VsyncSchedule::HwVsyncState::Disabled;
     }
 
+    using Scheduler::onHardwareVsyncRequest;
+
 private:
     // ICompositor overrides:
     void configure() override {}
diff --git a/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp b/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp
index 4010fa6..a8a3cd0 100644
--- a/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VsyncScheduleTest.cpp
@@ -25,7 +25,6 @@
 #include <scheduler/Fps.h>
 #include "Scheduler/VsyncSchedule.h"
 #include "ThreadContext.h"
-#include "mock/MockSchedulerCallback.h"
 #include "mock/MockVSyncDispatch.h"
 #include "mock/MockVSyncTracker.h"
 #include "mock/MockVsyncController.h"
@@ -34,20 +33,21 @@
 
 namespace android {
 
-constexpr PhysicalDisplayId DEFAULT_DISPLAY_ID = PhysicalDisplayId::fromPort(42u);
+constexpr PhysicalDisplayId kDisplayId = PhysicalDisplayId::fromPort(42u);
 
 class VsyncScheduleTest : public testing::Test {
 protected:
     VsyncScheduleTest();
     ~VsyncScheduleTest() override;
 
-    scheduler::mock::SchedulerCallback mCallback;
+    testing::MockFunction<void(PhysicalDisplayId, bool)> mRequestHardwareVsync;
+
     const std::unique_ptr<scheduler::VsyncSchedule> mVsyncSchedule =
             std::unique_ptr<scheduler::VsyncSchedule>(
-                    new scheduler::VsyncSchedule(DEFAULT_DISPLAY_ID,
-                                                 std::make_shared<mock::VSyncTracker>(),
+                    new scheduler::VsyncSchedule(kDisplayId, std::make_shared<mock::VSyncTracker>(),
                                                  std::make_shared<mock::VSyncDispatch>(),
-                                                 std::make_unique<mock::VsyncController>()));
+                                                 std::make_unique<mock::VsyncController>(),
+                                                 mRequestHardwareVsync.AsStdFunction()));
 
     mock::VsyncController& getController() {
         return *static_cast<mock::VsyncController*>(&mVsyncSchedule->getController());
@@ -75,21 +75,21 @@
 }
 
 TEST_F(VsyncScheduleTest, EnableDoesNothingWhenDisallowed) {
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
 
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 }
 
 TEST_F(VsyncScheduleTest, DisableDoesNothingWhenDisallowed) {
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
 
-    mVsyncSchedule->disableHardwareVsync(mCallback, false /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(false /* disallow */);
 }
 
 TEST_F(VsyncScheduleTest, DisableDoesNothingWhenDisallowed2) {
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
 
-    mVsyncSchedule->disableHardwareVsync(mCallback, true /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(true /* disallow */);
 }
 
 TEST_F(VsyncScheduleTest, MakeAllowed) {
@@ -98,33 +98,33 @@
 
 TEST_F(VsyncScheduleTest, DisableDoesNothingWhenDisabled) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
 
-    mVsyncSchedule->disableHardwareVsync(mCallback, false /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(false /* disallow */);
 }
 
 TEST_F(VsyncScheduleTest, DisableDoesNothingWhenDisabled2) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
 
-    mVsyncSchedule->disableHardwareVsync(mCallback, true /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(true /* disallow */);
 }
 
 TEST_F(VsyncScheduleTest, EnableWorksWhenDisabled) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, true));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
 
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 }
 
 TEST_F(VsyncScheduleTest, EnableWorksOnce) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, true));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
 
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
+    mVsyncSchedule->enableHardwareVsync();
 }
 
 TEST_F(VsyncScheduleTest, AllowedIsSticky) {
@@ -134,22 +134,22 @@
 
 TEST_F(VsyncScheduleTest, EnableDisable) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, true));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
 
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, false));
-    mVsyncSchedule->disableHardwareVsync(mCallback, false /* disallow */);
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, false));
+    mVsyncSchedule->disableHardwareVsync(false /* disallow */);
 }
 
 TEST_F(VsyncScheduleTest, EnableDisable2) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, true));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
 
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, false));
-    mVsyncSchedule->disableHardwareVsync(mCallback, true /* disallow */);
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, false));
+    mVsyncSchedule->disableHardwareVsync(true /* disallow */);
 }
 
 TEST_F(VsyncScheduleTest, StartPeriodTransition) {
@@ -159,22 +159,22 @@
 
     const Period period = (60_Hz).getPeriod();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, true));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
     EXPECT_CALL(getController(), startPeriodTransition(period.ns(), false));
 
-    mVsyncSchedule->startPeriodTransition(mCallback, period, false);
+    mVsyncSchedule->startPeriodTransition(period, false);
 }
 
 TEST_F(VsyncScheduleTest, StartPeriodTransitionAlreadyEnabled) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 
     const Period period = (60_Hz).getPeriod();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
     EXPECT_CALL(getController(), startPeriodTransition(period.ns(), false));
 
-    mVsyncSchedule->startPeriodTransition(mCallback, period, false);
+    mVsyncSchedule->startPeriodTransition(period, false);
 }
 
 TEST_F(VsyncScheduleTest, StartPeriodTransitionForce) {
@@ -182,20 +182,20 @@
 
     const Period period = (60_Hz).getPeriod();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, true));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, true));
     EXPECT_CALL(getController(), startPeriodTransition(period.ns(), true));
 
-    mVsyncSchedule->startPeriodTransition(mCallback, period, true);
+    mVsyncSchedule->startPeriodTransition(period, true);
 }
 
 TEST_F(VsyncScheduleTest, AddResyncSampleDisallowed) {
     const Period period = (60_Hz).getPeriod();
     const auto timestamp = TimePoint::now();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
     EXPECT_CALL(getController(), addHwVsyncTimestamp(_, _, _)).Times(0);
 
-    mVsyncSchedule->addResyncSample(mCallback, timestamp, period);
+    mVsyncSchedule->addResyncSample(timestamp, period);
 }
 
 TEST_F(VsyncScheduleTest, AddResyncSampleDisabled) {
@@ -203,40 +203,40 @@
     const Period period = (60_Hz).getPeriod();
     const auto timestamp = TimePoint::now();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
     EXPECT_CALL(getController(), addHwVsyncTimestamp(_, _, _)).Times(0);
 
-    mVsyncSchedule->addResyncSample(mCallback, timestamp, period);
+    mVsyncSchedule->addResyncSample(timestamp, period);
 }
 
 TEST_F(VsyncScheduleTest, AddResyncSampleReturnsTrue) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 
     const Period period = (60_Hz).getPeriod();
     const auto timestamp = TimePoint::now();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(_, _)).Times(0);
+    EXPECT_CALL(mRequestHardwareVsync, Call(_, _)).Times(0);
     EXPECT_CALL(getController(),
                 addHwVsyncTimestamp(timestamp.ns(), std::optional<nsecs_t>(period.ns()), _))
             .WillOnce(Return(true));
 
-    mVsyncSchedule->addResyncSample(mCallback, timestamp, period);
+    mVsyncSchedule->addResyncSample(timestamp, period);
 }
 
 TEST_F(VsyncScheduleTest, AddResyncSampleReturnsFalse) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    mVsyncSchedule->enableHardwareVsync(mCallback);
+    mVsyncSchedule->enableHardwareVsync();
 
     const Period period = (60_Hz).getPeriod();
     const auto timestamp = TimePoint::now();
 
-    EXPECT_CALL(mCallback, setVsyncEnabled(DEFAULT_DISPLAY_ID, false));
+    EXPECT_CALL(mRequestHardwareVsync, Call(kDisplayId, false));
     EXPECT_CALL(getController(),
                 addHwVsyncTimestamp(timestamp.ns(), std::optional<nsecs_t>(period.ns()), _))
             .WillOnce(Return(false));
 
-    mVsyncSchedule->addResyncSample(mCallback, timestamp, period);
+    mVsyncSchedule->addResyncSample(timestamp, period);
 }
 
 TEST_F(VsyncScheduleTest, PendingState) FTL_FAKE_GUARD(kMainThreadContext) {
@@ -250,19 +250,19 @@
 
 TEST_F(VsyncScheduleTest, DisableDoesNotMakeAllowed) {
     ASSERT_FALSE(mVsyncSchedule->isHardwareVsyncAllowed(false /* makeAllowed */));
-    mVsyncSchedule->disableHardwareVsync(mCallback, false /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(false /* disallow */);
     ASSERT_FALSE(mVsyncSchedule->isHardwareVsyncAllowed(false /* makeAllowed */));
 }
 
 TEST_F(VsyncScheduleTest, DisallowMakesNotAllowed) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    mVsyncSchedule->disableHardwareVsync(mCallback, true /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(true /* disallow */);
     ASSERT_FALSE(mVsyncSchedule->isHardwareVsyncAllowed(false /* makeAllowed */));
 }
 
 TEST_F(VsyncScheduleTest, StillAllowedAfterDisable) {
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(true /* makeAllowed */));
-    mVsyncSchedule->disableHardwareVsync(mCallback, false /* disallow */);
+    mVsyncSchedule->disableHardwareVsync(false /* disallow */);
     ASSERT_TRUE(mVsyncSchedule->isHardwareVsyncAllowed(false /* makeAllowed */));
 }
 
diff --git a/services/surfaceflinger/tests/unittests/mock/MockSchedulerCallback.h b/services/surfaceflinger/tests/unittests/mock/MockSchedulerCallback.h
index a8eca21..306eb4d 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockSchedulerCallback.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockSchedulerCallback.h
@@ -23,14 +23,14 @@
 namespace android::scheduler::mock {
 
 struct SchedulerCallback final : ISchedulerCallback {
-    MOCK_METHOD(void, setVsyncEnabled, (PhysicalDisplayId, bool), (override));
+    MOCK_METHOD(void, requestHardwareVsync, (PhysicalDisplayId, bool), (override));
     MOCK_METHOD(void, requestDisplayModes, (std::vector<display::DisplayModeRequest>), (override));
     MOCK_METHOD(void, kernelTimerChanged, (bool), (override));
     MOCK_METHOD(void, triggerOnFrameRateOverridesChanged, (), (override));
 };
 
 struct NoOpSchedulerCallback final : ISchedulerCallback {
-    void setVsyncEnabled(PhysicalDisplayId, bool) override {}
+    void requestHardwareVsync(PhysicalDisplayId, bool) override {}
     void requestDisplayModes(std::vector<display::DisplayModeRequest>) override {}
     void kernelTimerChanged(bool) override {}
     void triggerOnFrameRateOverridesChanged() override {}