SurfaceFlinger: Add DISPLAY_EVENT_FRAME_RATE_OVERRIDE

Add a new event to DisplayEventReceiver that conveys a list
of apps whose frame rates have been overriden.
This event is processed by the DisplayManager to advertise the
new frame rate to the overridden app.

Change-Id: I89fce8b5b4d9db65ec5db7dd2393c384c0fcfd82
Bug: 169271059
Bug: 169271062
Bug: 170503758
Test: manual test using SF backdoor

29 files changed, 330 insertions, 145 deletions

diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 560459be13..a8c0500683 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -14,6 +14,7 @@ clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp
                libs/graphicsenv/
                libs/gui/
                libs/input/
+               libs/nativedisplay/
                libs/renderengine/
                libs/ui/
                libs/vr/
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index a0e9cbf2eb..af9ef06b86 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -237,6 +237,10 @@ cc_defaults {
         "libnativebase_headers",
     ],
 
+    include_dirs: [
+        "frameworks/native/include",
+    ],
+
     export_shared_lib_headers: [
         "libEGL",
         "libnativewindow",
diff --git a/libs/gui/DisplayEventDispatcher.cpp b/libs/gui/DisplayEventDispatcher.cpp
index abfee61685..c6c9a8f7a7 100644
--- a/libs/gui/DisplayEventDispatcher.cpp
+++ b/libs/gui/DisplayEventDispatcher.cpp
@@ -33,10 +33,10 @@ namespace android {
 // using just a few large reads.
 static const size_t EVENT_BUFFER_SIZE = 100;
 
-DisplayEventDispatcher::DisplayEventDispatcher(const sp<Looper>& looper,
-                                               ISurfaceComposer::VsyncSource vsyncSource,
-                                               ISurfaceComposer::ConfigChanged configChanged)
-      : mLooper(looper), mReceiver(vsyncSource, configChanged), mWaitingForVsync(false) {
+DisplayEventDispatcher::DisplayEventDispatcher(
+        const sp<Looper>& looper, ISurfaceComposer::VsyncSource vsyncSource,
+        ISurfaceComposer::EventRegistrationFlags eventRegistration)
+      : mLooper(looper), mReceiver(vsyncSource, eventRegistration), mWaitingForVsync(false) {
     ALOGV("dispatcher %p ~ Initializing display event dispatcher.", this);
 }
 
@@ -139,6 +139,7 @@ bool DisplayEventDispatcher::processPendingEvents(nsecs_t* outTimestamp,
     ssize_t n;
     while ((n = mReceiver.getEvents(buf, EVENT_BUFFER_SIZE)) > 0) {
         ALOGV("dispatcher %p ~ Read %d events.", this, int(n));
+        mFrameRateOverrides.reserve(n);
         for (ssize_t i = 0; i < n; i++) {
             const DisplayEventReceiver::Event& ev = buf[i];
             switch (ev.header.type) {
@@ -162,6 +163,13 @@ bool DisplayEventDispatcher::processPendingEvents(nsecs_t* outTimestamp,
                 case DisplayEventReceiver::DISPLAY_EVENT_NULL:
                     dispatchNullEvent(ev.header.timestamp, ev.header.displayId);
                     break;
+                case DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE:
+                    mFrameRateOverrides.emplace_back(ev.frameRateOverride);
+                    break;
+                case DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE_FLUSH:
+                    dispatchFrameRateOverrides(ev.header.timestamp, ev.header.displayId,
+                                               std::move(mFrameRateOverrides));
+                    break;
                 default:
                     ALOGW("dispatcher %p ~ ignoring unknown event type %#x", this, ev.header.type);
                     break;
diff --git a/libs/gui/DisplayEventReceiver.cpp b/libs/gui/DisplayEventReceiver.cpp
index f2b0962eb7..03b33c7330 100644
--- a/libs/gui/DisplayEventReceiver.cpp
+++ b/libs/gui/DisplayEventReceiver.cpp
@@ -32,11 +32,12 @@ namespace android {
 
 // ---------------------------------------------------------------------------
 
-DisplayEventReceiver::DisplayEventReceiver(ISurfaceComposer::VsyncSource vsyncSource,
-                                           ISurfaceComposer::ConfigChanged configChanged) {
+DisplayEventReceiver::DisplayEventReceiver(
+        ISurfaceComposer::VsyncSource vsyncSource,
+        ISurfaceComposer::EventRegistrationFlags eventRegistration) {
     sp<ISurfaceComposer> sf(ComposerService::getComposerService());
     if (sf != nullptr) {
-        mEventConnection = sf->createDisplayEventConnection(vsyncSource, configChanged);
+        mEventConnection = sf->createDisplayEventConnection(vsyncSource, eventRegistration);
         if (mEventConnection != nullptr) {
             mDataChannel = std::make_unique<gui::BitTube>();
             mEventConnection->stealReceiveChannel(mDataChannel.get());
diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index a9fe5bf319..e46a415f8c 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -223,8 +223,8 @@ public:
         return NO_ERROR;
     }
 
-    virtual sp<IDisplayEventConnection> createDisplayEventConnection(VsyncSource vsyncSource,
-                                                                     ConfigChanged configChanged) {
+    virtual sp<IDisplayEventConnection> createDisplayEventConnection(
+            VsyncSource vsyncSource, EventRegistrationFlags eventRegistration) {
         Parcel data, reply;
         sp<IDisplayEventConnection> result;
         int err = data.writeInterfaceToken(
@@ -233,7 +233,7 @@ public:
             return result;
         }
         data.writeInt32(static_cast<int32_t>(vsyncSource));
-        data.writeInt32(static_cast<int32_t>(configChanged));
+        data.writeUint32(eventRegistration.get());
         err = remote()->transact(
                 BnSurfaceComposer::CREATE_DISPLAY_EVENT_CONNECTION,
                 data, &reply);
@@ -1373,10 +1373,11 @@ status_t BnSurfaceComposer::onTransact(
         case CREATE_DISPLAY_EVENT_CONNECTION: {
             CHECK_INTERFACE(ISurfaceComposer, data, reply);
             auto vsyncSource = static_cast<ISurfaceComposer::VsyncSource>(data.readInt32());
-            auto configChanged = static_cast<ISurfaceComposer::ConfigChanged>(data.readInt32());
+            EventRegistrationFlags eventRegistration =
+                    static_cast<EventRegistration>(data.readUint32());
 
             sp<IDisplayEventConnection> connection(
-                    createDisplayEventConnection(vsyncSource, configChanged));
+                    createDisplayEventConnection(vsyncSource, eventRegistration));
             reply->writeStrongBinder(IInterface::asBinder(connection));
             return NO_ERROR;
         }
diff --git a/libs/gui/include/gui/DisplayEventDispatcher.h b/libs/gui/include/gui/DisplayEventDispatcher.h
index c65618b31f..5587acf08f 100644
--- a/libs/gui/include/gui/DisplayEventDispatcher.h
+++ b/libs/gui/include/gui/DisplayEventDispatcher.h
@@ -19,6 +19,7 @@
 #include <utils/Looper.h>
 
 namespace android {
+using FrameRateOverride = DisplayEventReceiver::Event::FrameRateOverride;
 
 struct VsyncEventData {
     // The Vsync Id corresponsing to this vsync event. This will be used to
@@ -36,8 +37,7 @@ public:
     explicit DisplayEventDispatcher(
             const sp<Looper>& looper,
             ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp,
-            ISurfaceComposer::ConfigChanged configChanged =
-                    ISurfaceComposer::eConfigChangedSuppress);
+            ISurfaceComposer::EventRegistrationFlags eventRegistration = {});
 
     status_t initialize();
     void dispose();
@@ -54,6 +54,8 @@ private:
     DisplayEventReceiver mReceiver;
     bool mWaitingForVsync;
 
+    std::vector<FrameRateOverride> mFrameRateOverrides;
+
     virtual void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count,
                                VsyncEventData vsyncEventData) = 0;
     virtual void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId,
@@ -64,6 +66,9 @@ private:
     // can be properly poked.
     virtual void dispatchNullEvent(nsecs_t timestamp, PhysicalDisplayId displayId) = 0;
 
+    virtual void dispatchFrameRateOverrides(nsecs_t timestamp, PhysicalDisplayId displayId,
+                                            std::vector<FrameRateOverride> overrides) = 0;
+
     bool processPendingEvents(nsecs_t* outTimestamp, PhysicalDisplayId* outDisplayId,
                               uint32_t* outCount, VsyncEventData* outVsyncEventData);
 };
diff --git a/libs/gui/include/gui/DisplayEventReceiver.h b/libs/gui/include/gui/DisplayEventReceiver.h
index df3118ff6d..3191fc9ab5 100644
--- a/libs/gui/include/gui/DisplayEventReceiver.h
+++ b/libs/gui/include/gui/DisplayEventReceiver.h
@@ -54,6 +54,8 @@ public:
         DISPLAY_EVENT_HOTPLUG = fourcc('p', 'l', 'u', 'g'),
         DISPLAY_EVENT_CONFIG_CHANGED = fourcc('c', 'o', 'n', 'f'),
         DISPLAY_EVENT_NULL = fourcc('n', 'u', 'l', 'l'),
+        DISPLAY_EVENT_FRAME_RATE_OVERRIDE = fourcc('r', 'a', 't', 'e'),
+        DISPLAY_EVENT_FRAME_RATE_OVERRIDE_FLUSH = fourcc('f', 'l', 's', 'h'),
     };
 
     struct Event {
@@ -85,11 +87,17 @@ public:
             nsecs_t vsyncPeriod __attribute__((aligned(8)));
         };
 
+        struct FrameRateOverride {
+            uid_t uid __attribute__((aligned(8)));
+            float frameRateHz __attribute__((aligned(8)));
+        };
+
         Header header;
         union {
             VSync vsync;
             Hotplug hotplug;
             Config config;
+            FrameRateOverride frameRateOverride;
         };
     };
 
@@ -98,13 +106,12 @@ public:
      * DisplayEventReceiver creates and registers an event connection with
      * SurfaceFlinger. VSync events are disabled by default. Call setVSyncRate
      * or requestNextVsync to receive them.
-     * To receive Config Changed events specify this in the constructor.
-     * Other events start being delivered immediately.
+     * To receive ConfigChanged and/or FrameRateOverrides events specify this in
+     * the constructor. Other events start being delivered immediately.
      */
     explicit DisplayEventReceiver(
             ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp,
-            ISurfaceComposer::ConfigChanged configChanged =
-                    ISurfaceComposer::eConfigChangedSuppress);
+            ISurfaceComposer::EventRegistrationFlags eventRegistration = {});
 
     /*
      * ~DisplayEventReceiver severs the connection with SurfaceFlinger, new events
diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index 9e96b79b8c..86e3a25f5a 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -26,6 +26,8 @@
 #include <gui/IScreenCaptureListener.h>
 #include <gui/ITransactionCompletedListener.h>
 
+#include <input/Flags.h>
+
 #include <math/vec4.h>
 
 #include <ui/ConfigStoreTypes.h>
@@ -107,7 +109,12 @@ public:
         eVsyncSourceSurfaceFlinger = 1
     };
 
-    enum ConfigChanged { eConfigChangedSuppress = 0, eConfigChangedDispatch = 1 };
+    enum class EventRegistration {
+        configChanged = 1 << 0,
+        frameRateOverride = 1 << 1,
+    };
+
+    using EventRegistrationFlags = Flags<EventRegistration>;
 
     // Needs to be in sync with android.graphics.FrameInfo.INVALID_VSYNC_ID in java
     static constexpr int64_t INVALID_VSYNC_ID = -1;
@@ -120,7 +127,7 @@ public:
     /* return an IDisplayEventConnection */
     virtual sp<IDisplayEventConnection> createDisplayEventConnection(
             VsyncSource vsyncSource = eVsyncSourceApp,
-            ConfigChanged configChanged = eConfigChangedSuppress) = 0;
+            EventRegistrationFlags eventRegistration = {}) = 0;
 
     /* create a virtual display
      * requires ACCESS_SURFACE_FLINGER permission.
diff --git a/libs/gui/tests/DisplayEventStructLayout_test.cpp b/libs/gui/tests/DisplayEventStructLayout_test.cpp
index 72109109c4..c5093e2d88 100644
--- a/libs/gui/tests/DisplayEventStructLayout_test.cpp
+++ b/libs/gui/tests/DisplayEventStructLayout_test.cpp
@@ -40,6 +40,9 @@ TEST(DisplayEventStructLayoutTest, TestEventAlignment) {
 
     CHECK_OFFSET(DisplayEventReceiver::Event::Config, configId, 0);
     CHECK_OFFSET(DisplayEventReceiver::Event::Config, vsyncPeriod, 8);
+
+    CHECK_OFFSET(DisplayEventReceiver::Event::FrameRateOverride, uid, 0);
+    CHECK_OFFSET(DisplayEventReceiver::Event::FrameRateOverride, frameRateHz, 8);
 }
 
 } // namespace android::test
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index 2392ae5ccd..ce3afa2710 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -687,7 +687,7 @@ public:
 
     sp<ISurfaceComposerClient> createConnection() override { return nullptr; }
     sp<IDisplayEventConnection> createDisplayEventConnection(
-            ISurfaceComposer::VsyncSource, ISurfaceComposer::ConfigChanged) override {
+            ISurfaceComposer::VsyncSource, ISurfaceComposer::EventRegistrationFlags) override {
         return nullptr;
     }
     sp<IBinder> createDisplay(const String8& /*displayName*/,
diff --git a/libs/nativedisplay/AChoreographer.cpp b/libs/nativedisplay/AChoreographer.cpp
index 9e515cdc80..6d91916978 100644
--- a/libs/nativedisplay/AChoreographer.cpp
+++ b/libs/nativedisplay/AChoreographer.cpp
@@ -141,6 +141,8 @@ private:
     void dispatchConfigChanged(nsecs_t timestamp, PhysicalDisplayId displayId, int32_t configId,
                                nsecs_t vsyncPeriod) override;
     void dispatchNullEvent(nsecs_t, PhysicalDisplayId) override;
+    void dispatchFrameRateOverrides(nsecs_t timestamp, PhysicalDisplayId displayId,
+                                    std::vector<FrameRateOverride> overrides) override;
 
     void scheduleCallbacks();
 
@@ -175,8 +177,7 @@ Choreographer* Choreographer::getForThread() {
 }
 
 Choreographer::Choreographer(const sp<Looper>& looper)
-      : DisplayEventDispatcher(looper, ISurfaceComposer::VsyncSource::eVsyncSourceApp,
-                               ISurfaceComposer::ConfigChanged::eConfigChangedSuppress),
+      : DisplayEventDispatcher(looper, ISurfaceComposer::VsyncSource::eVsyncSourceApp),
         mLooper(looper),
         mThreadId(std::this_thread::get_id()) {
     std::lock_guard<std::mutex> _l(gChoreographers.lock);
@@ -381,15 +382,13 @@ void Choreographer::dispatchHotplug(nsecs_t, PhysicalDisplayId displayId, bool c
             this, to_string(displayId).c_str(), toString(connected));
 }
 
-// TODO(b/74619554): The PhysicalDisplayId is ignored because currently
-// Choreographer only supports dispatching VSYNC events for the internal
-// display, so as such Choreographer does not support the notion of multiple
-// displays. When multi-display choreographer is properly supported, then
-// PhysicalDisplayId should no longer be ignored.
-void Choreographer::dispatchConfigChanged(nsecs_t, PhysicalDisplayId displayId, int32_t configId,
-                                          nsecs_t) {
-    ALOGV("choreographer %p ~ received config change event (displayId=%s, configId=%d).",
-          this, to_string(displayId).c_str(), configId);
+void Choreographer::dispatchConfigChanged(nsecs_t, PhysicalDisplayId, int32_t, nsecs_t) {
+    LOG_ALWAYS_FATAL("dispatchConfigChanged was called but was never registered");
+}
+
+void Choreographer::dispatchFrameRateOverrides(nsecs_t, PhysicalDisplayId,
+                                               std::vector<FrameRateOverride>) {
+    LOG_ALWAYS_FATAL("dispatchFrameRateOverrides was called but was never registered");
 }
 
 void Choreographer::dispatchNullEvent(nsecs_t, PhysicalDisplayId) {
diff --git a/services/surfaceflinger/Scheduler/EventThread.cpp b/services/surfaceflinger/Scheduler/EventThread.cpp
index bf5be4790d..b63e8c835b 100644
--- a/services/surfaceflinger/Scheduler/EventThread.cpp
+++ b/services/surfaceflinger/Scheduler/EventThread.cpp
@@ -45,6 +45,9 @@
 #include "FrameTimeline.h"
 #include "HwcStrongTypes.h"
 
+#undef LOG_TAG
+#define LOG_TAG "EventThread"
+
 using namespace std::chrono_literals;
 
 namespace android {
@@ -123,14 +126,36 @@ DisplayEventReceiver::Event makeConfigChanged(PhysicalDisplayId displayId,
     return event;
 }
 
+DisplayEventReceiver::Event makeFrameRateOverrideEvent(PhysicalDisplayId displayId,
+                                                       FrameRateOverride frameRateOverride) {
+    return DisplayEventReceiver::Event{
+            .header =
+                    DisplayEventReceiver::Event::Header{
+                            .type = DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE,
+                            .displayId = displayId,
+                            .timestamp = systemTime(),
+                    },
+            .frameRateOverride = frameRateOverride,
+    };
+}
+
+DisplayEventReceiver::Event makeFrameRateOverrideFlushEvent(PhysicalDisplayId displayId) {
+    return DisplayEventReceiver::Event{
+            .header = DisplayEventReceiver::Event::Header{
+                    .type = DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE_FLUSH,
+                    .displayId = displayId,
+                    .timestamp = systemTime(),
+            }};
+}
+
 } // namespace
 
-EventThreadConnection::EventThreadConnection(EventThread* eventThread, uid_t callingUid,
-                                             ResyncCallback resyncCallback,
-                                             ISurfaceComposer::ConfigChanged configChanged)
+EventThreadConnection::EventThreadConnection(
+        EventThread* eventThread, uid_t callingUid, ResyncCallback resyncCallback,
+        ISurfaceComposer::EventRegistrationFlags eventRegistration)
       : resyncCallback(std::move(resyncCallback)),
-        mConfigChanged(configChanged),
         mOwnerUid(callingUid),
+        mEventRegistration(eventRegistration),
         mEventThread(eventThread),
         mChannel(gui::BitTube::DefaultSize) {}
 
@@ -161,8 +186,25 @@ void EventThreadConnection::requestNextVsync() {
 }
 
 status_t EventThreadConnection::postEvent(const DisplayEventReceiver::Event& event) {
-    ssize_t size = DisplayEventReceiver::sendEvents(&mChannel, &event, 1);
-    return size < 0 ? status_t(size) : status_t(NO_ERROR);
+    constexpr auto toStatus = [](ssize_t size) {
+        return size < 0 ? status_t(size) : status_t(NO_ERROR);
+    };
+
+    if (event.header.type == DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE ||
+        event.header.type == DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE_FLUSH) {
+        mPendingEvents.emplace_back(event);
+        if (event.header.type == DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE) {
+            return status_t(NO_ERROR);
+        }
+
+        auto size = DisplayEventReceiver::sendEvents(&mChannel, mPendingEvents.data(),
+                                                     mPendingEvents.size());
+        mPendingEvents.clear();
+        return toStatus(size);
+    }
+
+    auto size = DisplayEventReceiver::sendEvents(&mChannel, &event, 1);
+    return toStatus(size);
 }
 
 // ---------------------------------------------------------------------------
@@ -220,10 +262,11 @@ void EventThread::setDuration(std::chrono::nanoseconds workDuration,
 }
 
 sp<EventThreadConnection> EventThread::createEventConnection(
-        ResyncCallback resyncCallback, ISurfaceComposer::ConfigChanged configChanged) const {
+        ResyncCallback resyncCallback,
+        ISurfaceComposer::EventRegistrationFlags eventRegistration) const {
     return new EventThreadConnection(const_cast<EventThread*>(this),
                                      IPCThreadState::self()->getCallingUid(),
-                                     std::move(resyncCallback), configChanged);
+                                     std::move(resyncCallback), eventRegistration);
 }
 
 status_t EventThread::registerDisplayEventConnection(const sp<EventThreadConnection>& connection) {
@@ -333,6 +376,18 @@ void EventThread::onConfigChanged(PhysicalDisplayId displayId, HwcConfigIndexTyp
     mCondition.notify_all();
 }
 
+void EventThread::onFrameRateOverridesChanged(PhysicalDisplayId displayId,
+                                              std::vector<FrameRateOverride> overrides) {
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    for (auto frameRateOverride : overrides) {
+        mPendingEvents.push_back(makeFrameRateOverrideEvent(displayId, frameRateOverride));
+    }
+    mPendingEvents.push_back(makeFrameRateOverrideFlushEvent(displayId));
+
+    mCondition.notify_all();
+}
+
 size_t EventThread::getEventThreadConnectionCount() {
     std::lock_guard<std::mutex> lock(mMutex);
     return mDisplayEventConnections.size();
@@ -459,7 +514,8 @@ bool EventThread::shouldConsumeEvent(const DisplayEventReceiver::Event& event,
             return true;
 
         case DisplayEventReceiver::DISPLAY_EVENT_CONFIG_CHANGED: {
-            return connection->mConfigChanged == ISurfaceComposer::eConfigChangedDispatch;
+            return connection->mEventRegistration.test(
+                    ISurfaceComposer::EventRegistration::configChanged);
         }
 
         case DisplayEventReceiver::DISPLAY_EVENT_VSYNC:
@@ -488,6 +544,12 @@ bool EventThread::shouldConsumeEvent(const DisplayEventReceiver::Event& event,
                     return event.vsync.count % vsyncPeriod(connection->vsyncRequest) == 0;
             }
 
+        case DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE:
+            [[fallthrough]];
+        case DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE_FLUSH:
+            return connection->mEventRegistration.test(
+                    ISurfaceComposer::EventRegistration::frameRateOverride);
+
         default:
             return false;
     }
diff --git a/services/surfaceflinger/Scheduler/EventThread.h b/services/surfaceflinger/Scheduler/EventThread.h
index 2e2d98950e..e75b7189da 100644
--- a/services/surfaceflinger/Scheduler/EventThread.h
+++ b/services/surfaceflinger/Scheduler/EventThread.h
@@ -48,6 +48,7 @@ class TokenManager;
 // ---------------------------------------------------------------------------
 
 using ResyncCallback = std::function<void()>;
+using FrameRateOverride = DisplayEventReceiver::Event::FrameRateOverride;
 
 enum class VSyncRequest {
     None = -2,
@@ -82,7 +83,7 @@ public:
 class EventThreadConnection : public BnDisplayEventConnection {
 public:
     EventThreadConnection(EventThread*, uid_t callingUid, ResyncCallback,
-                          ISurfaceComposer::ConfigChanged configChanged);
+                          ISurfaceComposer::EventRegistrationFlags eventRegistration = {});
     virtual ~EventThreadConnection();
 
     virtual status_t postEvent(const DisplayEventReceiver::Event& event);
@@ -95,15 +96,15 @@ public:
     const ResyncCallback resyncCallback;
 
     VSyncRequest vsyncRequest = VSyncRequest::None;
-    const ISurfaceComposer::ConfigChanged mConfigChanged =
-            ISurfaceComposer::ConfigChanged::eConfigChangedSuppress;
-
     const uid_t mOwnerUid;
+    const ISurfaceComposer::EventRegistrationFlags mEventRegistration;
 
 private:
     virtual void onFirstRef();
     EventThread* const mEventThread;
     gui::BitTube mChannel;
+
+    std::vector<DisplayEventReceiver::Event> mPendingEvents;
 };
 
 class EventThread {
@@ -111,7 +112,8 @@ public:
     virtual ~EventThread();
 
     virtual sp<EventThreadConnection> createEventConnection(
-            ResyncCallback, ISurfaceComposer::ConfigChanged configChanged) const = 0;
+            ResyncCallback,
+            ISurfaceComposer::EventRegistrationFlags eventRegistration = {}) const = 0;
 
     // called before the screen is turned off from main thread
     virtual void onScreenReleased() = 0;
@@ -125,6 +127,10 @@ public:
     virtual void onConfigChanged(PhysicalDisplayId displayId, HwcConfigIndexType configId,
                                  nsecs_t vsyncPeriod) = 0;
 
+    // called when SF updates the Frame Rate Override list
+    virtual void onFrameRateOverridesChanged(PhysicalDisplayId displayId,
+                                             std::vector<FrameRateOverride> overrides) = 0;
+
     virtual void dump(std::string& result) const = 0;
 
     virtual void setDuration(std::chrono::nanoseconds workDuration,
@@ -152,7 +158,8 @@ public:
     ~EventThread();
 
     sp<EventThreadConnection> createEventConnection(
-            ResyncCallback, ISurfaceComposer::ConfigChanged configChanged) const override;
+            ResyncCallback,
+            ISurfaceComposer::EventRegistrationFlags eventRegistration = {}) const override;
 
     status_t registerDisplayEventConnection(const sp<EventThreadConnection>& connection) override;
     void setVsyncRate(uint32_t rate, const sp<EventThreadConnection>& connection) override;
@@ -169,6 +176,9 @@ public:
     void onConfigChanged(PhysicalDisplayId displayId, HwcConfigIndexType configId,
                          nsecs_t vsyncPeriod) override;
 
+    void onFrameRateOverridesChanged(PhysicalDisplayId displayId,
+                                     std::vector<FrameRateOverride> overrides) override;
+
     void dump(std::string& result) const override;
 
     void setDuration(std::chrono::nanoseconds workDuration,
diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
index b872d7a4dd..8b4283cd65 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
@@ -687,21 +687,20 @@ RefreshRateConfigs::KernelIdleTimerAction RefreshRateConfigs::getIdleTimerAction
     return RefreshRateConfigs::KernelIdleTimerAction::TurnOn;
 }
 
-void RefreshRateConfigs::setPreferredRefreshRateForUid(uid_t uid, float refreshRateHz) {
-    if (refreshRateHz > 0 && refreshRateHz < 1) {
+void RefreshRateConfigs::setPreferredRefreshRateForUid(FrameRateOverride frameRateOverride) {
+    if (frameRateOverride.frameRateHz > 0 && frameRateOverride.frameRateHz < 1) {
         return;
     }
 
     std::lock_guard lock(mLock);
-    if (refreshRateHz != 0) {
-        mPreferredRefreshRateForUid[uid] = refreshRateHz;
+    if (frameRateOverride.frameRateHz != 0) {
+        mPreferredRefreshRateForUid[frameRateOverride.uid] = frameRateOverride.frameRateHz;
     } else {
-        mPreferredRefreshRateForUid.erase(uid);
+        mPreferredRefreshRateForUid.erase(frameRateOverride.uid);
     }
 }
 
 int RefreshRateConfigs::getRefreshRateDividerForUid(uid_t uid) const {
-    constexpr float kThreshold = 0.1f;
     std::lock_guard lock(mLock);
 
     const auto iter = mPreferredRefreshRateForUid.find(uid);
@@ -709,6 +708,9 @@ int RefreshRateConfigs::getRefreshRateDividerForUid(uid_t uid) const {
         return 1;
     }
 
+    // This calculation needs to be in sync with the java code
+    // in DisplayManagerService.getDisplayInfoForFrameRateOverride
+    constexpr float kThreshold = 0.1f;
     const auto refreshRateHz = iter->second;
     const auto numPeriods = mCurrentRefreshRate->getFps() / refreshRateHz;
     const auto numPeriodsRounded = std::round(numPeriods);
@@ -716,7 +718,19 @@ int RefreshRateConfigs::getRefreshRateDividerForUid(uid_t uid) const {
         return 1;
     }
 
-    return static_cast<int>(numPeriods);
+    return static_cast<int>(numPeriodsRounded);
+}
+
+std::vector<FrameRateOverride> RefreshRateConfigs::getFrameRateOverrides() {
+    std::lock_guard lock(mLock);
+    std::vector<FrameRateOverride> overrides;
+    overrides.reserve(mPreferredRefreshRateForUid.size());
+
+    for (const auto [uid, frameRate] : mPreferredRefreshRateForUid) {
+        overrides.emplace_back(FrameRateOverride{uid, frameRate});
+    }
+
+    return overrides;
 }
 
 void RefreshRateConfigs::dump(std::string& result) const {
diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
index 3159352db9..a8737778d3 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <android-base/stringprintf.h>
+#include <gui/DisplayEventReceiver.h>
 
 #include <algorithm>
 #include <numeric>
@@ -39,6 +40,8 @@ inline RefreshRateConfigEvent operator|(RefreshRateConfigEvent lhs, RefreshRateC
     return static_cast<RefreshRateConfigEvent>(static_cast<T>(lhs) | static_cast<T>(rhs));
 }
 
+using FrameRateOverride = DisplayEventReceiver::Event::FrameRateOverride;
+
 /**
  * This class is used to encapsulate configuration for refresh rates. It holds information
  * about available refresh rates on the device, and the mapping between the numbers and human
@@ -316,14 +319,17 @@ public:
     KernelIdleTimerAction getIdleTimerAction() const;
 
     // Stores the preferred refresh rate that an app should run at.
-    // refreshRate == 0 means no preference.
-    void setPreferredRefreshRateForUid(uid_t, float refreshRateHz) EXCLUDES(mLock);
+    // FrameRateOverride.refreshRateHz == 0 means no preference.
+    void setPreferredRefreshRateForUid(FrameRateOverride) EXCLUDES(mLock);
 
     // Returns a divider for the current refresh rate
     int getRefreshRateDividerForUid(uid_t) const EXCLUDES(mLock);
 
     void dump(std::string& result) const EXCLUDES(mLock);
 
+    // Returns the current frame rate overrides
+    std::vector<FrameRateOverride> getFrameRateOverrides() EXCLUDES(mLock);
+
 private:
     friend class RefreshRateConfigsTest;
 
@@ -381,6 +387,8 @@ private:
     Policy mDisplayManagerPolicy GUARDED_BY(mLock);
     std::optional<Policy> mOverridePolicy GUARDED_BY(mLock);
 
+    // A mapping between a UID and a preferred refresh rate that this app would
+    // run at.
     std::unordered_map<uid_t, float> mPreferredRefreshRateForUid GUARDED_BY(mLock);
 
     // The min and max refresh rates supported by the device.
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index a14019eeb5..a93bf11301 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -239,8 +239,7 @@ Scheduler::ConnectionHandle Scheduler::createConnection(std::unique_ptr<EventThr
     const ConnectionHandle handle = ConnectionHandle{mNextConnectionHandleId++};
     ALOGV("Creating a connection handle with ID %" PRIuPTR, handle.id);
 
-    auto connection =
-            createConnectionInternal(eventThread.get(), ISurfaceComposer::eConfigChangedSuppress);
+    auto connection = createConnectionInternal(eventThread.get());
 
     std::lock_guard<std::mutex> lock(mConnectionsLock);
     mConnections.emplace(handle, Connection{connection, std::move(eventThread)});
@@ -248,15 +247,15 @@ Scheduler::ConnectionHandle Scheduler::createConnection(std::unique_ptr<EventThr
 }
 
 sp<EventThreadConnection> Scheduler::createConnectionInternal(
-        EventThread* eventThread, ISurfaceComposer::ConfigChanged configChanged) {
-    return eventThread->createEventConnection([&] { resync(); }, configChanged);
+        EventThread* eventThread, ISurfaceComposer::EventRegistrationFlags eventRegistration) {
+    return eventThread->createEventConnection([&] { resync(); }, eventRegistration);
 }
 
 sp<IDisplayEventConnection> Scheduler::createDisplayEventConnection(
-        ConnectionHandle handle, ISurfaceComposer::ConfigChanged configChanged) {
+        ConnectionHandle handle, ISurfaceComposer::EventRegistrationFlags eventRegistration) {
     std::lock_guard<std::mutex> lock(mConnectionsLock);
     RETURN_IF_INVALID_HANDLE(handle, nullptr);
-    return createConnectionInternal(mConnections[handle].thread.get(), configChanged);
+    return createConnectionInternal(mConnections[handle].thread.get(), eventRegistration);
 }
 
 sp<EventThreadConnection> Scheduler::getEventConnection(ConnectionHandle handle) {
@@ -297,6 +296,17 @@ void Scheduler::onScreenReleased(ConnectionHandle handle) {
     thread->onScreenReleased();
 }
 
+void Scheduler::onFrameRateOverridesChanged(ConnectionHandle handle, PhysicalDisplayId displayId,
+                                            std::vector<FrameRateOverride> overrides) {
+    android::EventThread* thread;
+    {
+        std::lock_guard<std::mutex> lock(mConnectionsLock);
+        RETURN_IF_INVALID_HANDLE(handle);
+        thread = mConnections[handle].thread.get();
+    }
+    thread->onFrameRateOverridesChanged(displayId, std::move(overrides));
+}
+
 void Scheduler::onPrimaryDisplayConfigChanged(ConnectionHandle handle, PhysicalDisplayId displayId,
                                               HwcConfigIndexType configId, nsecs_t vsyncPeriod) {
     std::lock_guard<std::mutex> lock(mFeatureStateLock);
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 4c86d26a01..76e8f57adc 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -79,8 +79,8 @@ public:
                                       std::chrono::nanoseconds readyDuration,
                                       impl::EventThread::InterceptVSyncsCallback);
 
-    sp<IDisplayEventConnection> createDisplayEventConnection(ConnectionHandle,
-                                                             ISurfaceComposer::ConfigChanged);
+    sp<IDisplayEventConnection> createDisplayEventConnection(
+            ConnectionHandle, ISurfaceComposer::EventRegistrationFlags eventRegistration = {});
 
     sp<EventThreadConnection> getEventConnection(ConnectionHandle);
 
@@ -93,6 +93,9 @@ public:
     void onScreenAcquired(ConnectionHandle);
     void onScreenReleased(ConnectionHandle);
 
+    void onFrameRateOverridesChanged(ConnectionHandle, PhysicalDisplayId,
+                                     std::vector<FrameRateOverride>);
+
     // Modifies work duration in the event thread.
     void setDuration(ConnectionHandle, std::chrono::nanoseconds workDuration,
                      std::chrono::nanoseconds readyDuration);
@@ -203,8 +206,8 @@ private:
 
     // Create a connection on the given EventThread.
     ConnectionHandle createConnection(std::unique_ptr<EventThread>);
-    sp<EventThreadConnection> createConnectionInternal(EventThread*,
-                                                       ISurfaceComposer::ConfigChanged);
+    sp<EventThreadConnection> createConnectionInternal(
+            EventThread*, ISurfaceComposer::EventRegistrationFlags eventRegistration = {});
 
     // Update feature state machine to given state when corresponding timer resets or expires.
     void kernelIdleTimerCallback(TimerState);
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 91f050c017..eed6aa4a07 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1527,11 +1527,12 @@ status_t SurfaceFlinger::notifyPowerBoost(int32_t boostId) {
 // ----------------------------------------------------------------------------
 
 sp<IDisplayEventConnection> SurfaceFlinger::createDisplayEventConnection(
-        ISurfaceComposer::VsyncSource vsyncSource, ISurfaceComposer::ConfigChanged configChanged) {
+        ISurfaceComposer::VsyncSource vsyncSource,
+        ISurfaceComposer::EventRegistrationFlags eventRegistration) {
     const auto& handle =
             vsyncSource == eVsyncSourceSurfaceFlinger ? mSfConnectionHandle : mAppConnectionHandle;
 
-    return mScheduler->createDisplayEventConnection(handle, configChanged);
+    return mScheduler->createDisplayEventConnection(handle, eventRegistration);
 }
 
 void SurfaceFlinger::signalTransaction() {
@@ -5274,10 +5275,18 @@ status_t SurfaceFlinger::onTransact(uint32_t code, const Parcel& data, Parcel* r
                 return NO_ERROR;
             }
             case 1039: {
-                // The first parameter is the uid
-                n = data.readInt32();
-                const float refreshRateHz = data.readFloat();
-                mRefreshRateConfigs->setPreferredRefreshRateForUid(n, refreshRateHz);
+                PhysicalDisplayId displayId = [&]() {
+                    Mutex::Autolock lock(mStateLock);
+                    return getDefaultDisplayDeviceLocked()->getPhysicalId();
+                }();
+
+                auto inUid = static_cast<uid_t>(data.readInt32());
+                const auto refreshRate = data.readFloat();
+                mRefreshRateConfigs->setPreferredRefreshRateForUid(
+                        FrameRateOverride{inUid, refreshRate});
+                const auto mappings = mRefreshRateConfigs->getFrameRateOverrides();
+                mScheduler->onFrameRateOverridesChanged(mAppConnectionHandle, displayId,
+                                                        std::move(mappings));
             }
                 return NO_ERROR;
         }
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 9666f145b0..a909ad81c0 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -530,8 +530,7 @@ private:
     status_t getSupportedFrameTimestamps(std::vector<FrameEvent>* outSupported) const override;
     sp<IDisplayEventConnection> createDisplayEventConnection(
             ISurfaceComposer::VsyncSource vsyncSource = eVsyncSourceApp,
-            ISurfaceComposer::ConfigChanged configChanged =
-                    ISurfaceComposer::eConfigChangedSuppress) override;
+            ISurfaceComposer::EventRegistrationFlags eventRegistration = {}) override;
     status_t captureDisplay(const DisplayCaptureArgs& args,
                             const sp<IScreenCaptureListener>& captureListener) override;
     status_t captureDisplay(uint64_t displayOrLayerStack,
diff --git a/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp b/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp
index 0a70f5c504..31a51268e6 100644
--- a/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp
+++ b/services/surfaceflinger/tests/fakehwc/SFFakeHwc_test.cpp
@@ -240,8 +240,9 @@ protected:
         mComposerClient = new SurfaceComposerClient;
         ASSERT_EQ(NO_ERROR, mComposerClient->initCheck());
 
-        mReceiver.reset(new DisplayEventReceiver(ISurfaceComposer::eVsyncSourceApp,
-                                                 ISurfaceComposer::eConfigChangedDispatch));
+        mReceiver.reset(
+                new DisplayEventReceiver(ISurfaceComposer::eVsyncSourceApp,
+                                         ISurfaceComposer::EventRegistration::configChanged));
         mLooper = new Looper(false);
         mLooper->addFd(mReceiver->getFd(), 0, ALOOPER_EVENT_INPUT, processDisplayEvents, this);
     }
diff --git a/services/surfaceflinger/tests/unittests/CompositionTest.cpp b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
index 091171266f..be9d336137 100644
--- a/services/surfaceflinger/tests/unittests/CompositionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
@@ -133,17 +133,13 @@ public:
 
         EXPECT_CALL(*eventThread, registerDisplayEventConnection(_));
         EXPECT_CALL(*eventThread, createEventConnection(_, _))
-                .WillOnce(Return(
-                        new EventThreadConnection(eventThread.get(), /*callingUid=*/0,
-                                                  ResyncCallback(),
-                                                  ISurfaceComposer::eConfigChangedSuppress)));
+                .WillOnce(Return(new EventThreadConnection(eventThread.get(), /*callingUid=*/0,
+                                                           ResyncCallback())));
 
         EXPECT_CALL(*sfEventThread, registerDisplayEventConnection(_));
         EXPECT_CALL(*sfEventThread, createEventConnection(_, _))
-                .WillOnce(Return(
-                        new EventThreadConnection(sfEventThread.get(), /*callingUid=*/0,
-                                                  ResyncCallback(),
-                                                  ISurfaceComposer::eConfigChangedSuppress)));
+                .WillOnce(Return(new EventThreadConnection(sfEventThread.get(), /*callingUid=*/0,
+                                                           ResyncCallback())));
 
         auto vsyncController = std::make_unique<mock::VsyncController>();
         auto vsyncTracker = std::make_unique<mock::VSyncTracker>();
diff --git a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
index f0311bdaab..90692003ef 100644
--- a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
@@ -70,15 +70,13 @@ DisplayTransactionTest::~DisplayTransactionTest() {
 void DisplayTransactionTest::injectMockScheduler() {
     EXPECT_CALL(*mEventThread, registerDisplayEventConnection(_));
     EXPECT_CALL(*mEventThread, createEventConnection(_, _))
-            .WillOnce(Return(new EventThreadConnection(mEventThread, /*callingUid=*/0,
-                                                       ResyncCallback(),
-                                                       ISurfaceComposer::eConfigChangedSuppress)));
+            .WillOnce(Return(
+                    new EventThreadConnection(mEventThread, /*callingUid=*/0, ResyncCallback())));
 
     EXPECT_CALL(*mSFEventThread, registerDisplayEventConnection(_));
     EXPECT_CALL(*mSFEventThread, createEventConnection(_, _))
-            .WillOnce(Return(new EventThreadConnection(mSFEventThread, /*callingUid=*/0,
-                                                       ResyncCallback(),
-                                                       ISurfaceComposer::eConfigChangedSuppress)));
+            .WillOnce(Return(
+                    new EventThreadConnection(mSFEventThread, /*callingUid=*/0, ResyncCallback())));
 
     mFlinger.setupScheduler(std::unique_ptr<scheduler::VsyncController>(mVsyncController),
                             std::unique_ptr<scheduler::VSyncTracker>(mVSyncTracker),
diff --git a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
index 3aafd456d9..ee56178169 100644
--- a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
+++ b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
@@ -29,6 +29,7 @@
 using namespace std::chrono_literals;
 using namespace std::placeholders;
 
+using namespace android::flag_operators;
 using testing::_;
 using testing::Invoke;
 
@@ -61,9 +62,9 @@ protected:
     public:
         MockEventThreadConnection(impl::EventThread* eventThread, uid_t callingUid,
                                   ResyncCallback&& resyncCallback,
-                                  ISurfaceComposer::ConfigChanged configChanged)
+                                  ISurfaceComposer::EventRegistrationFlags eventRegistration)
               : EventThreadConnection(eventThread, callingUid, std::move(resyncCallback),
-                                      configChanged) {}
+                                      eventRegistration) {}
         MOCK_METHOD1(postEvent, status_t(const DisplayEventReceiver::Event& event));
     };
 
@@ -74,9 +75,10 @@ protected:
     ~EventThreadTest() override;
 
     void createThread(std::unique_ptr<VSyncSource>);
-    sp<MockEventThreadConnection> createConnection(ConnectionEventRecorder& recorder,
-                                                   ISurfaceComposer::ConfigChanged configChanged,
-                                                   uid_t ownerUid = mConnectionUid);
+    sp<MockEventThreadConnection> createConnection(
+            ConnectionEventRecorder& recorder,
+            ISurfaceComposer::EventRegistrationFlags eventRegistration = {},
+            uid_t ownerUid = mConnectionUid);
 
     void expectVSyncSetEnabledCallReceived(bool expectedState);
     void expectVSyncSetDurationCallReceived(std::chrono::nanoseconds expectedDuration,
@@ -93,6 +95,8 @@ protected:
                                                       int32_t expectedConfigId,
                                                       nsecs_t expectedVsyncPeriod);
     void expectThrottleVsyncReceived(nsecs_t expectedTimestamp, uid_t);
+    void expectUidFrameRateMappingEventReceivedByConnection(PhysicalDisplayId expectedDisplayId,
+                                                            std::vector<FrameRateOverride>);
 
     AsyncCallRecorder<void (*)(bool)> mVSyncSetEnabledCallRecorder;
     AsyncCallRecorder<void (*)(VSyncSource::Callback*)> mVSyncSetCallbackCallRecorder;
@@ -133,10 +137,11 @@ EventThreadTest::EventThreadTest() {
 
     createThread(std::move(vsyncSource));
     mConnection = createConnection(mConnectionEventCallRecorder,
-                                   ISurfaceComposer::eConfigChangedDispatch);
-    mThrottledConnection =
-            createConnection(mThrottledConnectionEventCallRecorder,
-                             ISurfaceComposer::eConfigChangedDispatch, mThrottledConnectionUid);
+                                   ISurfaceComposer::EventRegistration::configChanged |
+                                           ISurfaceComposer::EventRegistration::frameRateOverride);
+    mThrottledConnection = createConnection(mThrottledConnectionEventCallRecorder,
+                                            ISurfaceComposer::EventRegistration::configChanged,
+                                            mThrottledConnectionUid);
 
     // A display must be connected for VSYNC events to be delivered.
     mThread->onHotplugReceived(INTERNAL_DISPLAY_ID, true);
@@ -169,11 +174,11 @@ void EventThreadTest::createThread(std::unique_ptr<VSyncSource> source) {
 }
 
 sp<EventThreadTest::MockEventThreadConnection> EventThreadTest::createConnection(
-        ConnectionEventRecorder& recorder, ISurfaceComposer::ConfigChanged configChanged,
-        uid_t ownerUid) {
+        ConnectionEventRecorder& recorder,
+        ISurfaceComposer::EventRegistrationFlags eventRegistration, uid_t ownerUid) {
     sp<MockEventThreadConnection> connection =
             new MockEventThreadConnection(mThread.get(), ownerUid,
-                                          mResyncCallRecorder.getInvocable(), configChanged);
+                                          mResyncCallRecorder.getInvocable(), eventRegistration);
     EXPECT_CALL(*connection, postEvent(_)).WillRepeatedly(Invoke(recorder.getInvocable()));
     return connection;
 }
@@ -254,6 +259,25 @@ void EventThreadTest::expectConfigChangedEventReceivedByConnection(
     EXPECT_EQ(expectedVsyncPeriod, event.config.vsyncPeriod);
 }
 
+void EventThreadTest::expectUidFrameRateMappingEventReceivedByConnection(
+        PhysicalDisplayId expectedDisplayId, std::vector<FrameRateOverride> expectedOverrides) {
+    for (const auto [uid, frameRateHz] : expectedOverrides) {
+        auto args = mConnectionEventCallRecorder.waitForCall();
+        ASSERT_TRUE(args.has_value());
+        const auto& event = std::get<0>(args.value());
+        EXPECT_EQ(DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE, event.header.type);
+        EXPECT_EQ(expectedDisplayId, event.header.displayId);
+        EXPECT_EQ(uid, event.frameRateOverride.uid);
+        EXPECT_EQ(frameRateHz, event.frameRateOverride.frameRateHz);
+    }
+
+    auto args = mConnectionEventCallRecorder.waitForCall();
+    ASSERT_TRUE(args.has_value());
+    const auto& event = std::get<0>(args.value());
+    EXPECT_EQ(DisplayEventReceiver::DISPLAY_EVENT_FRAME_RATE_OVERRIDE_FLUSH, event.header.type);
+    EXPECT_EQ(expectedDisplayId, event.header.displayId);
+}
+
 namespace {
 
 /* ------------------------------------------------------------------------
@@ -313,9 +337,7 @@ TEST_F(EventThreadTest, requestNextVsyncPostsASingleVSyncEventToTheConnection) {
 TEST_F(EventThreadTest, setVsyncRateZeroPostsNoVSyncEventsToThatConnection) {
     // Create a first connection, register it, and request a vsync rate of zero.
     ConnectionEventRecorder firstConnectionEventRecorder{0};
-    sp<MockEventThreadConnection> firstConnection =
-            createConnection(firstConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+    sp<MockEventThreadConnection> firstConnection = createConnection(firstConnectionEventRecorder);
     mThread->setVsyncRate(0, firstConnection);
 
     // By itself, this should not enable vsync events
@@ -325,8 +347,7 @@ TEST_F(EventThreadTest, setVsyncRateZeroPostsNoVSyncEventsToThatConnection) {
     // However if there is another connection which wants events at a nonzero rate.....
     ConnectionEventRecorder secondConnectionEventRecorder{0};
     sp<MockEventThreadConnection> secondConnection =
-            createConnection(secondConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+            createConnection(secondConnectionEventRecorder);
     mThread->setVsyncRate(1, secondConnection);
 
     // EventThread should enable vsync callbacks.
@@ -418,9 +439,7 @@ TEST_F(EventThreadTest, connectionsRemovedIfInstanceDestroyed) {
 
 TEST_F(EventThreadTest, connectionsRemovedIfEventDeliveryError) {
     ConnectionEventRecorder errorConnectionEventRecorder{NO_MEMORY};
-    sp<MockEventThreadConnection> errorConnection =
-            createConnection(errorConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+    sp<MockEventThreadConnection> errorConnection = createConnection(errorConnectionEventRecorder);
     mThread->setVsyncRate(1, errorConnection);
 
     // EventThread should enable vsync callbacks.
@@ -445,15 +464,12 @@ TEST_F(EventThreadTest, connectionsRemovedIfEventDeliveryError) {
 TEST_F(EventThreadTest, tracksEventConnections) {
     EXPECT_EQ(2, mThread->getEventThreadConnectionCount());
     ConnectionEventRecorder errorConnectionEventRecorder{NO_MEMORY};
-    sp<MockEventThreadConnection> errorConnection =
-            createConnection(errorConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+    sp<MockEventThreadConnection> errorConnection = createConnection(errorConnectionEventRecorder);
     mThread->setVsyncRate(1, errorConnection);
     EXPECT_EQ(3, mThread->getEventThreadConnectionCount());
     ConnectionEventRecorder secondConnectionEventRecorder{0};
     sp<MockEventThreadConnection> secondConnection =
-            createConnection(secondConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+            createConnection(secondConnectionEventRecorder);
     mThread->setVsyncRate(1, secondConnection);
     EXPECT_EQ(4, mThread->getEventThreadConnectionCount());
 
@@ -472,9 +488,7 @@ TEST_F(EventThreadTest, tracksEventConnections) {
 
 TEST_F(EventThreadTest, eventsDroppedIfNonfatalEventDeliveryError) {
     ConnectionEventRecorder errorConnectionEventRecorder{WOULD_BLOCK};
-    sp<MockEventThreadConnection> errorConnection =
-            createConnection(errorConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+    sp<MockEventThreadConnection> errorConnection = createConnection(errorConnectionEventRecorder);
     mThread->setVsyncRate(1, errorConnection);
 
     // EventThread should enable vsync callbacks.
@@ -539,8 +553,7 @@ TEST_F(EventThreadTest, postConfigChangedPrimary64bit) {
 TEST_F(EventThreadTest, suppressConfigChanged) {
     ConnectionEventRecorder suppressConnectionEventRecorder{0};
     sp<MockEventThreadConnection> suppressConnection =
-            createConnection(suppressConnectionEventRecorder,
-                             ISurfaceComposer::eConfigChangedSuppress);
+            createConnection(suppressConnectionEventRecorder);
 
     mThread->onConfigChanged(INTERNAL_DISPLAY_ID, HwcConfigIndexType(9), 16666666);
     expectConfigChangedEventReceivedByConnection(INTERNAL_DISPLAY_ID, 9, 16666666);
@@ -549,6 +562,35 @@ TEST_F(EventThreadTest, suppressConfigChanged) {
     ASSERT_FALSE(args.has_value());
 }
 
+TEST_F(EventThreadTest, postUidFrameRateMapping) {
+    const std::vector<FrameRateOverride> overrides = {
+            {.uid = 1, .frameRateHz = 20},
+            {.uid = 3, .frameRateHz = 40},
+            {.uid = 5, .frameRateHz = 60},
+    };
+
+    mThread->onFrameRateOverridesChanged(INTERNAL_DISPLAY_ID, overrides);
+    expectUidFrameRateMappingEventReceivedByConnection(INTERNAL_DISPLAY_ID, overrides);
+}
+
+TEST_F(EventThreadTest, suppressUidFrameRateMapping) {
+    const std::vector<FrameRateOverride> overrides = {
+            {.uid = 1, .frameRateHz = 20},
+            {.uid = 3, .frameRateHz = 40},
+            {.uid = 5, .frameRateHz = 60},
+    };
+
+    ConnectionEventRecorder suppressConnectionEventRecorder{0};
+    sp<MockEventThreadConnection> suppressConnection =
+            createConnection(suppressConnectionEventRecorder);
+
+    mThread->onFrameRateOverridesChanged(INTERNAL_DISPLAY_ID, overrides);
+    expectUidFrameRateMappingEventReceivedByConnection(INTERNAL_DISPLAY_ID, overrides);
+
+    auto args = suppressConnectionEventRecorder.waitForCall();
+    ASSERT_FALSE(args.has_value());
+}
+
 TEST_F(EventThreadTest, requestNextVsyncWithThrottleVsyncDoesntPostVSync) {
     // Signal that we want the next vsync event to be posted to the throttled connection
     mThread->requestNextVsync(mThrottledConnection);
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
index df7611043a..2fbc72a01a 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
@@ -1601,7 +1601,7 @@ TEST_F(RefreshRateConfigsTest, RefreshRateDividerForUid) {
             std::make_unique<RefreshRateConfigs>(m30_60_72_90_120Device,
                                                  /*currentConfigId=*/HWC_CONFIG_ID_30);
     const uid_t uid = 1234;
-    refreshRateConfigs->setPreferredRefreshRateForUid(uid, 30);
+    refreshRateConfigs->setPreferredRefreshRateForUid({uid, 30});
     EXPECT_EQ(1, refreshRateConfigs->getRefreshRateDividerForUid(uid));
 
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_60);
@@ -1615,6 +1615,12 @@ TEST_F(RefreshRateConfigsTest, RefreshRateDividerForUid) {
 
     refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_120);
     EXPECT_EQ(4, refreshRateConfigs->getRefreshRateDividerForUid(uid));
+
+    refreshRateConfigs->setCurrentConfigId(HWC_CONFIG_ID_90);
+    refreshRateConfigs->setPreferredRefreshRateForUid({uid, 22.5});
+    EXPECT_EQ(4, refreshRateConfigs->getRefreshRateDividerForUid(uid));
+    refreshRateConfigs->setPreferredRefreshRateForUid({uid, 22.6f});
+    EXPECT_EQ(4, refreshRateConfigs->getRefreshRateDividerForUid(uid));
 }
 
 } // namespace
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
index 8cd8372626..c5deb7ca07 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
@@ -132,14 +132,12 @@ void RefreshRateSelectionTest::setupScheduler() {
     EXPECT_CALL(*eventThread, registerDisplayEventConnection(_));
     EXPECT_CALL(*eventThread, createEventConnection(_, _))
             .WillOnce(Return(new EventThreadConnection(eventThread.get(), /*callingUid=*/0,
-                                                       ResyncCallback(),
-                                                       ISurfaceComposer::eConfigChangedSuppress)));
+                                                       ResyncCallback())));
 
     EXPECT_CALL(*sfEventThread, registerDisplayEventConnection(_));
     EXPECT_CALL(*sfEventThread, createEventConnection(_, _))
             .WillOnce(Return(new EventThreadConnection(sfEventThread.get(), /*callingUid=*/0,
-                                                       ResyncCallback(),
-                                                       ISurfaceComposer::eConfigChangedSuppress)));
+                                                       ResyncCallback())));
 
     auto vsyncController = std::make_unique<mock::VsyncController>();
     auto vsyncTracker = std::make_unique<mock::VSyncTracker>();
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index 509858a4ab..647689b46c 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -42,8 +42,7 @@ protected:
     class MockEventThreadConnection : public android::EventThreadConnection {
     public:
         explicit MockEventThreadConnection(EventThread* eventThread)
-              : EventThreadConnection(eventThread, /*callingUid=*/0, ResyncCallback(),
-                                      ISurfaceComposer::eConfigChangedSuppress) {}
+              : EventThreadConnection(eventThread, /*callingUid=*/0, ResyncCallback()) {}
         ~MockEventThreadConnection() = default;
 
         MOCK_METHOD1(stealReceiveChannel, status_t(gui::BitTube* outChannel));
@@ -98,9 +97,7 @@ SchedulerTest::SchedulerTest() {
 TEST_F(SchedulerTest, invalidConnectionHandle) {
     Scheduler::ConnectionHandle handle;
 
-    const sp<IDisplayEventConnection> connection =
-            mScheduler.createDisplayEventConnection(handle,
-                                                    ISurfaceComposer::eConfigChangedSuppress);
+    const sp<IDisplayEventConnection> connection = mScheduler.createDisplayEventConnection(handle);
 
     EXPECT_FALSE(connection);
     EXPECT_FALSE(mScheduler.getEventConnection(handle));
@@ -126,8 +123,7 @@ TEST_F(SchedulerTest, invalidConnectionHandle) {
 
 TEST_F(SchedulerTest, validConnectionHandle) {
     const sp<IDisplayEventConnection> connection =
-            mScheduler.createDisplayEventConnection(mConnectionHandle,
-                                                    ISurfaceComposer::eConfigChangedSuppress);
+            mScheduler.createDisplayEventConnection(mConnectionHandle);
 
     ASSERT_EQ(mEventThreadConnection, connection);
     EXPECT_TRUE(mScheduler.getEventConnection(mConnectionHandle));
diff --git a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
index e25d501fe3..5278641e5b 100644
--- a/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SetFrameRateTest.cpp
@@ -172,14 +172,12 @@ void SetFrameRateTest::setupScheduler() {
     EXPECT_CALL(*eventThread, registerDisplayEventConnection(_));
     EXPECT_CALL(*eventThread, createEventConnection(_, _))
             .WillOnce(Return(new EventThreadConnection(eventThread.get(), /*callingUid=*/0,
-                                                       ResyncCallback(),
-                                                       ISurfaceComposer::eConfigChangedSuppress)));
+                                                       ResyncCallback())));
 
     EXPECT_CALL(*sfEventThread, registerDisplayEventConnection(_));
     EXPECT_CALL(*sfEventThread, createEventConnection(_, _))
             .WillOnce(Return(new EventThreadConnection(sfEventThread.get(), /*callingUid=*/0,
-                                                       ResyncCallback(),
-                                                       ISurfaceComposer::eConfigChangedSuppress)));
+                                                       ResyncCallback())));
 
     auto vsyncController = std::make_unique<mock::VsyncController>();
     auto vsyncTracker = std::make_unique<mock::VSyncTracker>();
diff --git a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
index 68cf330b9c..c36d9947b7 100644
--- a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
@@ -65,17 +65,13 @@ public:
 
         EXPECT_CALL(*eventThread, registerDisplayEventConnection(_));
         EXPECT_CALL(*eventThread, createEventConnection(_, _))
-                .WillOnce(Return(
-                        new EventThreadConnection(eventThread.get(), /*callingUid=*/0,
-                                                  ResyncCallback(),
-                                                  ISurfaceComposer::eConfigChangedSuppress)));
+                .WillOnce(Return(new EventThreadConnection(eventThread.get(), /*callingUid=*/0,
+                                                           ResyncCallback())));
 
         EXPECT_CALL(*sfEventThread, registerDisplayEventConnection(_));
         EXPECT_CALL(*sfEventThread, createEventConnection(_, _))
-                .WillOnce(Return(
-                        new EventThreadConnection(sfEventThread.get(), /*callingUid=*/0,
-                                                  ResyncCallback(),
-                                                  ISurfaceComposer::eConfigChangedSuppress)));
+                .WillOnce(Return(new EventThreadConnection(sfEventThread.get(), /*callingUid=*/0,
+                                                           ResyncCallback())));
 
         EXPECT_CALL(*mVSyncTracker, nextAnticipatedVSyncTimeFrom(_)).WillRepeatedly(Return(0));
         EXPECT_CALL(*mVSyncTracker, currentPeriod())
diff --git a/services/surfaceflinger/tests/unittests/mock/MockEventThread.h b/services/surfaceflinger/tests/unittests/mock/MockEventThread.h
index b4594c183d..650d52d88a 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockEventThread.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockEventThread.h
@@ -28,11 +28,14 @@ public:
     ~EventThread() override;
 
     MOCK_CONST_METHOD2(createEventConnection,
-                       sp<EventThreadConnection>(ResyncCallback, ISurfaceComposer::ConfigChanged));
+                       sp<EventThreadConnection>(ResyncCallback,
+                                                 ISurfaceComposer::EventRegistrationFlags));
     MOCK_METHOD0(onScreenReleased, void());
     MOCK_METHOD0(onScreenAcquired, void());
     MOCK_METHOD2(onHotplugReceived, void(PhysicalDisplayId, bool));
     MOCK_METHOD3(onConfigChanged, void(PhysicalDisplayId, HwcConfigIndexType, nsecs_t));
+    MOCK_METHOD2(onFrameRateOverridesChanged,
+                 void(PhysicalDisplayId, std::vector<FrameRateOverride>));
     MOCK_CONST_METHOD1(dump, void(std::string&));
     MOCK_METHOD2(setDuration,
                  void(std::chrono::nanoseconds workDuration,