diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index c5f5372..a5195f4 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -41,7 +41,7 @@
 
 #include "Display/DisplaySnapshot.h"
 #include "DisplayDevice.h"
-#include "FrontEnd/FrontEndDisplayInfo.h"
+#include "FrontEnd/DisplayInfo.h"
 #include "Layer.h"
 #include "RefreshRateOverlay.h"
 #include "SurfaceFlinger.h"
@@ -132,7 +132,7 @@
     }
 }
 
-auto DisplayDevice::getFrontEndInfo() const -> FrontEndDisplayInfo {
+auto DisplayDevice::getFrontEndInfo() const -> frontend::DisplayInfo {
     gui::DisplayInfo info;
     info.displayId = getLayerStack().id;
 
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index afa13e5..4b64aab 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -45,7 +45,7 @@
 #include "DisplayHardware/DisplayMode.h"
 #include "DisplayHardware/Hal.h"
 #include "DisplayHardware/PowerAdvisor.h"
-#include "FrontEnd/FrontEndDisplayInfo.h"
+#include "FrontEnd/DisplayInfo.h"
 #include "Scheduler/RefreshRateSelector.h"
 #include "ThreadContext.h"
 #include "TracedOrdinal.h"
@@ -167,7 +167,7 @@
     void setDisplayName(const std::string& displayName);
     const std::string& getDisplayName() const { return mDisplayName; }
 
-    surfaceflinger::FrontEndDisplayInfo getFrontEndInfo() const;
+    surfaceflinger::frontend::DisplayInfo getFrontEndInfo() const;
 
     /* ------------------------------------------------------------------------
      * Display power mode management.
diff --git a/services/surfaceflinger/FrontEnd/FrontEndDisplayInfo.h b/services/surfaceflinger/FrontEnd/DisplayInfo.h
similarity index 84%
rename from services/surfaceflinger/FrontEnd/FrontEndDisplayInfo.h
rename to services/surfaceflinger/FrontEnd/DisplayInfo.h
index 95e69b3..0c7b24a 100644
--- a/services/surfaceflinger/FrontEnd/FrontEndDisplayInfo.h
+++ b/services/surfaceflinger/FrontEnd/DisplayInfo.h
@@ -18,11 +18,10 @@
 
 #include <gui/DisplayInfo.h>
 
-// TODO (b/259553365) fix namespace to be consistent with other components
-namespace android::surfaceflinger {
+namespace android::surfaceflinger::frontend {
 
 // Display information needed to populate input and calculate layer geometry.
-struct FrontEndDisplayInfo {
+struct DisplayInfo {
     gui::DisplayInfo info;
     ui::Transform transform;
     bool receivesInput;
@@ -32,4 +31,4 @@
     ui::Transform::RotationFlags rotationFlags;
 };
 
-} // namespace android::surfaceflinger
+} // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/FrontEnd/TransactionHandler.cpp b/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
index 95961fe..8629671 100644
--- a/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
+++ b/services/surfaceflinger/FrontEnd/TransactionHandler.cpp
@@ -24,7 +24,7 @@
 
 #include "TransactionHandler.h"
 
-namespace android {
+namespace android::surfaceflinger::frontend {
 
 void TransactionHandler::queueTransaction(TransactionState&& state) {
     mLocklessTransactionQueue.push(std::move(state));
@@ -186,4 +186,4 @@
         mStalledTransactions.erase(it);
     }
 }
-} // namespace android
+} // namespace android::surfaceflinger::frontend
diff --git a/services/surfaceflinger/FrontEnd/TransactionHandler.h b/services/surfaceflinger/FrontEnd/TransactionHandler.h
index 2b6f07d..a06b870 100644
--- a/services/surfaceflinger/FrontEnd/TransactionHandler.h
+++ b/services/surfaceflinger/FrontEnd/TransactionHandler.h
@@ -18,9 +18,6 @@
 
 #include <semaphore.h>
 #include <cstdint>
-#include <mutex>
-#include <queue>
-#include <thread>
 #include <vector>
 
 #include <LocklessQueue.h>
@@ -30,6 +27,10 @@
 #include <ftl/small_vector.h>
 
 namespace android {
+
+class TestableSurfaceFlinger;
+namespace surfaceflinger::frontend {
+
 class TransactionHandler {
 public:
     struct TransactionFlushState {
@@ -60,7 +61,7 @@
 
 private:
     // For unit tests
-    friend class TestableSurfaceFlinger;
+    friend class ::android::TestableSurfaceFlinger;
 
     int flushPendingTransactionQueues(std::vector<TransactionState>&, TransactionFlushState&);
     TransactionReadiness applyFilters(TransactionFlushState&);
@@ -71,5 +72,5 @@
     ftl::SmallVector<TransactionFilter, 2> mTransactionReadyFilters;
     std::vector<uint64_t> mStalledTransactions;
 };
-
+} // namespace surfaceflinger::frontend
 } // namespace android
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 2c510d7..fad951e 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -180,6 +180,7 @@
 using base::StringAppendF;
 using display::PhysicalDisplay;
 using display::PhysicalDisplays;
+using frontend::TransactionHandler;
 using gui::DisplayInfo;
 using gui::GameMode;
 using gui::IDisplayEventConnection;
@@ -3304,7 +3305,7 @@
         if (!layer->needsInputInfo()) return;
 
         const auto opt = mFrontEndDisplayInfos.get(layer->getLayerStack())
-                                 .transform([](const FrontEndDisplayInfo& info) {
+                                 .transform([](const frontend::DisplayInfo& info) {
                                      return Layer::InputDisplayArgs{&info.transform, info.isSecure};
                                  });
 
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 7c0926a..50e8e73 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -66,7 +66,7 @@
 #include "DisplayIdGenerator.h"
 #include "Effects/Daltonizer.h"
 #include "FlagManager.h"
-#include "FrontEnd/FrontEndDisplayInfo.h"
+#include "FrontEnd/DisplayInfo.h"
 #include "FrontEnd/LayerCreationArgs.h"
 #include "FrontEnd/TransactionHandler.h"
 #include "LayerVector.h"
@@ -121,6 +121,7 @@
 class ScreenCapturer;
 class WindowInfosListenerInvoker;
 
+using frontend::TransactionHandler;
 using gui::CaptureArgs;
 using gui::DisplayCaptureArgs;
 using gui::IRegionSamplingListener;
@@ -1367,7 +1368,7 @@
     } mPowerHintSessionMode;
 
     TransactionHandler mTransactionHandler;
-    display::DisplayMap<ui::LayerStack, FrontEndDisplayInfo> mFrontEndDisplayInfos;
+    display::DisplayMap<ui::LayerStack, frontend::DisplayInfo> mFrontEndDisplayInfos;
 };
 
 class SurfaceComposerAIDL : public gui::BnSurfaceComposer {
diff --git a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
index 488d4a9..d84698f 100644
--- a/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionApplicationTest.cpp
@@ -42,6 +42,8 @@
 using testing::Return;
 
 using FakeHwcDisplayInjector = TestableSurfaceFlinger::FakeHwcDisplayInjector;
+using frontend::TransactionHandler;
+
 constexpr nsecs_t TRANSACTION_TIMEOUT = s2ns(5);
 class TransactionApplicationTest : public testing::Test {
 public: