diff --git a/include/input/DisplayViewport.h b/include/input/DisplayViewport.h
index b0eceef..97c2ab8 100644
--- a/include/input/DisplayViewport.h
+++ b/include/input/DisplayViewport.h
@@ -19,7 +19,6 @@
 #include <android-base/stringprintf.h>
 #include <ftl/enum.h>
 #include <ftl/string.h>
-#include <gui/constants.h>
 #include <input/Input.h>
 #include <ui/Rotation.h>
 
@@ -47,7 +46,7 @@
  * See com.android.server.display.DisplayViewport.
  */
 struct DisplayViewport {
-    int32_t displayId; // -1 if invalid
+    ui::LogicalDisplayId displayId; // ADISPLAY_ID_NONE if invalid
     ui::Rotation orientation;
     int32_t logicalLeft;
     int32_t logicalTop;
@@ -67,7 +66,7 @@
     ViewportType type;
 
     DisplayViewport()
-          : displayId(ADISPLAY_ID_NONE),
+          : displayId(ui::ADISPLAY_ID_NONE),
             orientation(ui::ROTATION_0),
             logicalLeft(0),
             logicalTop(0),
@@ -99,12 +98,10 @@
         return !(*this == other);
     }
 
-    inline bool isValid() const {
-        return displayId >= 0;
-    }
+    inline bool isValid() const { return displayId.isValid(); }
 
     void setNonDisplayViewport(int32_t width, int32_t height) {
-        displayId = ADISPLAY_ID_NONE;
+        displayId = ui::ADISPLAY_ID_NONE;
         orientation = ui::ROTATION_0;
         logicalLeft = 0;
         logicalTop = 0;
@@ -123,12 +120,13 @@
     }
 
     std::string toString() const {
-        return StringPrintf("Viewport %s: displayId=%d, uniqueId=%s, port=%s, orientation=%d, "
+        return StringPrintf("Viewport %s: displayId=%s, uniqueId=%s, port=%s, orientation=%d, "
                             "logicalFrame=[%d, %d, %d, %d], "
                             "physicalFrame=[%d, %d, %d, %d], "
                             "deviceSize=[%d, %d], "
                             "isActive=[%d]",
-                            ftl::enum_string(type).c_str(), displayId, uniqueId.c_str(),
+                            ftl::enum_string(type).c_str(), displayId.toString().c_str(),
+                            uniqueId.c_str(),
                             physicalPort ? ftl::to_string(*physicalPort).c_str() : "<none>",
                             static_cast<int>(orientation), logicalLeft, logicalTop, logicalRight,
                             logicalBottom, physicalLeft, physicalTop, physicalRight, physicalBottom,
diff --git a/include/input/Input.h b/include/input/Input.h
index 3f81fb0..092a698 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -29,6 +29,7 @@
 #include <android/os/PointerIconType.h>
 #include <math.h>
 #include <stdint.h>
+#include <ui/LogicalDisplayId.h>
 #include <ui/Transform.h>
 #include <utils/BitSet.h>
 #include <utils/Timers.h>
@@ -547,9 +548,9 @@
 
     inline void setSource(uint32_t source) { mSource = source; }
 
-    inline int32_t getDisplayId() const { return mDisplayId; }
+    inline ui::LogicalDisplayId getDisplayId() const { return mDisplayId; }
 
-    inline void setDisplayId(int32_t displayId) { mDisplayId = displayId; }
+    inline void setDisplayId(ui::LogicalDisplayId displayId) { mDisplayId = displayId; }
 
     inline std::array<uint8_t, 32> getHmac() const { return mHmac; }
 
@@ -558,7 +559,7 @@
     bool operator==(const InputEvent&) const = default;
 
 protected:
-    void initialize(int32_t id, DeviceId deviceId, uint32_t source, int32_t displayId,
+    void initialize(int32_t id, DeviceId deviceId, uint32_t source, ui::LogicalDisplayId displayId,
                     std::array<uint8_t, 32> hmac);
 
     void initialize(const InputEvent& from);
@@ -566,7 +567,7 @@
     int32_t mId;
     DeviceId mDeviceId;
     uint32_t mSource;
-    int32_t mDisplayId;
+    ui::LogicalDisplayId mDisplayId{ui::ADISPLAY_ID_NONE};
     std::array<uint8_t, 32> mHmac;
 };
 
@@ -602,7 +603,7 @@
     static const char* getLabel(int32_t keyCode);
     static std::optional<int> getKeyCodeFromLabel(const char* label);
 
-    void initialize(int32_t id, DeviceId deviceId, uint32_t source, int32_t displayId,
+    void initialize(int32_t id, DeviceId deviceId, uint32_t source, ui::LogicalDisplayId displayId,
                     std::array<uint8_t, 32> hmac, int32_t action, int32_t flags, int32_t keyCode,
                     int32_t scanCode, int32_t metaState, int32_t repeatCount, nsecs_t downTime,
                     nsecs_t eventTime);
@@ -864,7 +865,7 @@
 
     ssize_t findPointerIndex(int32_t pointerId) const;
 
-    void initialize(int32_t id, DeviceId deviceId, uint32_t source, int32_t displayId,
+    void initialize(int32_t id, DeviceId deviceId, uint32_t source, ui::LogicalDisplayId displayId,
                     std::array<uint8_t, 32> hmac, int32_t action, int32_t actionButton,
                     int32_t flags, int32_t edgeFlags, int32_t metaState, int32_t buttonState,
                     MotionClassification classification, const ui::Transform& transform,
@@ -1073,7 +1074,7 @@
     DeviceId deviceId;
     nsecs_t eventTimeNanos;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId;
 };
 
 /**
diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index e93fe8c..8783d9c 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -280,7 +280,7 @@
 
     void initialize(int32_t id, int32_t generation, int32_t controllerNumber,
                     const InputDeviceIdentifier& identifier, const std::string& alias,
-                    bool isExternal, bool hasMic, int32_t associatedDisplayId,
+                    bool isExternal, bool hasMic, ui::LogicalDisplayId associatedDisplayId,
                     InputDeviceViewBehavior viewBehavior = {{}}, bool enabled = true);
 
     inline int32_t getId() const { return mId; }
@@ -348,7 +348,7 @@
     }
     inline std::optional<InputDeviceUsiVersion> getUsiVersion() const { return mUsiVersion; }
 
-    inline int32_t getAssociatedDisplayId() const { return mAssociatedDisplayId; }
+    inline ui::LogicalDisplayId getAssociatedDisplayId() const { return mAssociatedDisplayId; }
 
     inline void setEnabled(bool enabled) { mEnabled = enabled; }
     inline bool isEnabled() const { return mEnabled; }
@@ -366,7 +366,7 @@
     int32_t mKeyboardType;
     std::shared_ptr<KeyCharacterMap> mKeyCharacterMap;
     std::optional<InputDeviceUsiVersion> mUsiVersion;
-    int32_t mAssociatedDisplayId;
+    ui::LogicalDisplayId mAssociatedDisplayId{ui::ADISPLAY_ID_NONE};
     bool mEnabled;
 
     bool mHasVibrator;
diff --git a/include/input/InputEventBuilders.h b/include/input/InputEventBuilders.h
index c0c5e24..837e70e 100644
--- a/include/input/InputEventBuilders.h
+++ b/include/input/InputEventBuilders.h
@@ -18,7 +18,6 @@
 
 #include <android/input.h>
 #include <attestation/HmacKeyManager.h>
-#include <gui/constants.h>
 #include <input/Input.h>
 #include <utils/Timers.h> // for nsecs_t, systemTime
 
@@ -83,7 +82,7 @@
         return *this;
     }
 
-    MotionEventBuilder& displayId(int32_t displayId) {
+    MotionEventBuilder& displayId(ui::LogicalDisplayId displayId) {
         mDisplayId = displayId;
         return *this;
     }
@@ -159,7 +158,7 @@
     int32_t mSource;
     nsecs_t mDownTime;
     nsecs_t mEventTime;
-    int32_t mDisplayId{ADISPLAY_ID_DEFAULT};
+    ui::LogicalDisplayId mDisplayId{ui::ADISPLAY_ID_DEFAULT};
     int32_t mActionButton{0};
     int32_t mButtonState{0};
     int32_t mFlags{0};
@@ -209,7 +208,7 @@
         return *this;
     }
 
-    KeyEventBuilder& displayId(int32_t displayId) {
+    KeyEventBuilder& displayId(ui::LogicalDisplayId displayId) {
         mDisplayId = displayId;
         return *this;
     }
@@ -248,7 +247,7 @@
     uint32_t mSource;
     nsecs_t mDownTime;
     nsecs_t mEventTime;
-    int32_t mDisplayId{ADISPLAY_ID_DEFAULT};
+    ui::LogicalDisplayId mDisplayId{ui::ADISPLAY_ID_DEFAULT};
     uint32_t mPolicyFlags = DEFAULT_POLICY_FLAGS;
     int32_t mFlags{0};
     int32_t mKeyCode{AKEYCODE_UNKNOWN};
diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index 5f9c8f5..6548810 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -353,9 +353,10 @@
      * Other errors probably indicate that the channel is broken.
      */
     status_t publishKeyEvent(uint32_t seq, int32_t eventId, int32_t deviceId, int32_t source,
-                             int32_t displayId, std::array<uint8_t, 32> hmac, int32_t action,
-                             int32_t flags, int32_t keyCode, int32_t scanCode, int32_t metaState,
-                             int32_t repeatCount, nsecs_t downTime, nsecs_t eventTime);
+                             ui::LogicalDisplayId displayId, std::array<uint8_t, 32> hmac,
+                             int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
+                             int32_t metaState, int32_t repeatCount, nsecs_t downTime,
+                             nsecs_t eventTime);
 
     /* Publishes a motion event to the input channel.
      *
@@ -366,9 +367,9 @@
      * Other errors probably indicate that the channel is broken.
      */
     status_t publishMotionEvent(uint32_t seq, int32_t eventId, int32_t deviceId, int32_t source,
-                                int32_t displayId, std::array<uint8_t, 32> hmac, int32_t action,
-                                int32_t actionButton, int32_t flags, int32_t edgeFlags,
-                                int32_t metaState, int32_t buttonState,
+                                ui::LogicalDisplayId displayId, std::array<uint8_t, 32> hmac,
+                                int32_t action, int32_t actionButton, int32_t flags,
+                                int32_t edgeFlags, int32_t metaState, int32_t buttonState,
                                 MotionClassification classification, const ui::Transform& transform,
                                 float xPrecision, float yPrecision, float xCursorPosition,
                                 float yCursorPosition, const ui::Transform& rawTransform,
diff --git a/libs/gui/DisplayInfo.cpp b/libs/gui/DisplayInfo.cpp
index bd640df..47cec07 100644
--- a/libs/gui/DisplayInfo.cpp
+++ b/libs/gui/DisplayInfo.cpp
@@ -37,8 +37,9 @@
         return BAD_VALUE;
     }
 
+    int32_t displayIdInt;
     float dsdx, dtdx, tx, dtdy, dsdy, ty;
-    SAFE_PARCEL(parcel->readInt32, &displayId);
+    SAFE_PARCEL(parcel->readInt32, &displayIdInt);
     SAFE_PARCEL(parcel->readInt32, &logicalWidth);
     SAFE_PARCEL(parcel->readInt32, &logicalHeight);
     SAFE_PARCEL(parcel->readFloat, &dsdx);
@@ -48,6 +49,7 @@
     SAFE_PARCEL(parcel->readFloat, &dsdy);
     SAFE_PARCEL(parcel->readFloat, &ty);
 
+    displayId = ui::LogicalDisplayId{displayIdInt};
     transform.set({dsdx, dtdx, tx, dtdy, dsdy, ty, 0, 0, 1});
 
     return OK;
@@ -59,7 +61,7 @@
         return BAD_VALUE;
     }
 
-    SAFE_PARCEL(parcel->writeInt32, displayId);
+    SAFE_PARCEL(parcel->writeInt32, displayId.val());
     SAFE_PARCEL(parcel->writeInt32, logicalWidth);
     SAFE_PARCEL(parcel->writeInt32, logicalHeight);
     SAFE_PARCEL(parcel->writeFloat, transform.dsdx());
@@ -76,7 +78,7 @@
     using android::base::StringAppendF;
 
     out += prefix;
-    StringAppendF(&out, "DisplayViewport[id=%" PRId32 "]\n", displayId);
+    StringAppendF(&out, "DisplayViewport[id=%s]\n", displayId.toString().c_str());
     out += prefix;
     StringAppendF(&out, INDENT "Width=%" PRId32 ", Height=%" PRId32 "\n", logicalWidth,
                   logicalHeight);
diff --git a/libs/gui/WindowInfo.cpp b/libs/gui/WindowInfo.cpp
index ad0d99d..82d2554 100644
--- a/libs/gui/WindowInfo.cpp
+++ b/libs/gui/WindowInfo.cpp
@@ -146,7 +146,7 @@
         parcel->writeInt32(ownerUid.val()) ?:
         parcel->writeUtf8AsUtf16(packageName) ?:
         parcel->writeInt32(inputConfig.get()) ?:
-        parcel->writeInt32(displayId) ?:
+        parcel->writeInt32(displayId.val()) ?:
         applicationInfo.writeToParcel(parcel) ?:
         parcel->write(touchableRegion) ?:
         parcel->writeBool(replaceTouchableRegionWithCrop) ?:
@@ -175,7 +175,8 @@
     }
 
     float dsdx, dtdx, tx, dtdy, dsdy, ty;
-    int32_t lpFlags, lpType, touchOcclusionModeInt, inputConfigInt, ownerPidInt, ownerUidInt;
+    int32_t lpFlags, lpType, touchOcclusionModeInt, inputConfigInt, ownerPidInt, ownerUidInt,
+            displayIdInt;
     sp<IBinder> touchableRegionCropHandleSp;
 
     // clang-format off
@@ -198,7 +199,7 @@
         parcel->readInt32(&ownerUidInt) ?:
         parcel->readUtf8FromUtf16(&packageName) ?:
         parcel->readInt32(&inputConfigInt) ?:
-        parcel->readInt32(&displayId) ?:
+        parcel->readInt32(&displayIdInt) ?:
         applicationInfo.readFromParcel(parcel) ?:
         parcel->read(touchableRegion) ?:
         parcel->readBool(&replaceTouchableRegionWithCrop) ?:
@@ -221,6 +222,7 @@
     ownerPid = Pid{ownerPidInt};
     ownerUid = Uid{static_cast<uid_t>(ownerUidInt)};
     touchableRegionCropHandle = touchableRegionCropHandleSp;
+    displayId = ui::LogicalDisplayId{displayIdInt};
 
     return OK;
 }
diff --git a/libs/gui/include/gui/DisplayInfo.h b/libs/gui/include/gui/DisplayInfo.h
index 42b62c7..7282b80 100644
--- a/libs/gui/include/gui/DisplayInfo.h
+++ b/libs/gui/include/gui/DisplayInfo.h
@@ -18,7 +18,7 @@
 
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
-#include <gui/constants.h>
+#include <ui/LogicalDisplayId.h>
 #include <ui/Transform.h>
 
 namespace android::gui {
@@ -29,7 +29,7 @@
  * This should only be used by InputFlinger to support raw coordinates in logical display space.
  */
 struct DisplayInfo : public Parcelable {
-    int32_t displayId = ADISPLAY_ID_NONE;
+    ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE;
 
     // Logical display dimensions.
     int32_t logicalWidth = 0;
diff --git a/libs/gui/include/gui/WindowInfo.h b/libs/gui/include/gui/WindowInfo.h
index b73e497..3ea3f67 100644
--- a/libs/gui/include/gui/WindowInfo.h
+++ b/libs/gui/include/gui/WindowInfo.h
@@ -23,7 +23,7 @@
 #include <ftl/flags.h>
 #include <ftl/mixins.h>
 #include <gui/PidUid.h>
-#include <gui/constants.h>
+#include <ui/LogicalDisplayId.h>
 #include <ui/Rect.h>
 #include <ui/Region.h>
 #include <ui/Size.h>
@@ -234,7 +234,7 @@
     Uid ownerUid = Uid::INVALID;
     std::string packageName;
     ftl::Flags<InputConfig> inputConfig;
-    int32_t displayId = ADISPLAY_ID_NONE;
+    ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE;
     InputApplicationInfo applicationInfo;
     bool replaceTouchableRegionWithCrop = false;
     wp<IBinder> touchableRegionCropHandle;
diff --git a/libs/gui/include/gui/constants.h b/libs/gui/include/gui/constants.h
deleted file mode 100644
index 8eab378..0000000
--- a/libs/gui/include/gui/constants.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2021 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.
- */
-
-#pragma once
-
-#include <stdint.h>
-
-namespace android {
-
-/**
- * Invalid value for display size. Used when display size isn't available.
- */
-constexpr int32_t INVALID_DISPLAY_SIZE = 0;
-
-enum {
-    /* Used when an event is not associated with any display.
-     * Typically used for non-pointer events. */
-    ADISPLAY_ID_NONE = -1,
-
-    /* The default display id. */
-    ADISPLAY_ID_DEFAULT = 0,
-};
-
-} // namespace android
\ No newline at end of file
diff --git a/libs/gui/tests/DisplayInfo_test.cpp b/libs/gui/tests/DisplayInfo_test.cpp
index df3329c..4df76b1 100644
--- a/libs/gui/tests/DisplayInfo_test.cpp
+++ b/libs/gui/tests/DisplayInfo_test.cpp
@@ -28,7 +28,7 @@
 
 TEST(DisplayInfo, Parcelling) {
     DisplayInfo info;
-    info.displayId = 42;
+    info.displayId = ui::LogicalDisplayId{42};
     info.logicalWidth = 99;
     info.logicalHeight = 78;
     info.transform.set({0.4, -1, 100, 0.5, 0, 40, 0, 0, 1});
diff --git a/libs/gui/tests/EndToEndNativeInputTest.cpp b/libs/gui/tests/EndToEndNativeInputTest.cpp
index f441eaa..c0e7965 100644
--- a/libs/gui/tests/EndToEndNativeInputTest.cpp
+++ b/libs/gui/tests/EndToEndNativeInputTest.cpp
@@ -59,8 +59,16 @@
 using android::gui::InputApplicationInfo;
 using android::gui::TouchOcclusionMode;
 using android::gui::WindowInfo;
+using android::ui::ADISPLAY_ID_DEFAULT;
+using android::ui::ADISPLAY_ID_NONE;
 
-namespace android::test {
+namespace android {
+namespace {
+ui::LogicalDisplayId toDisplayId(ui::LayerStack layerStack) {
+    return ui::LogicalDisplayId{static_cast<int32_t>(layerStack.id)};
+}
+} // namespace
+namespace test {
 
 using Transaction = SurfaceComposerClient::Transaction;
 
@@ -68,7 +76,9 @@
     sp<IBinder> input(defaultServiceManager()->waitForService(String16("inputflinger")));
     if (input == nullptr) {
         ALOGE("Failed to link to input service");
-    } else { ALOGE("Linked to input"); }
+    } else {
+        ALOGE("Linked to input");
+    }
     return interface_cast<IInputFlinger>(input);
 }
 
@@ -99,7 +109,7 @@
 
 class InputSurface {
 public:
-    InputSurface(const sp<SurfaceControl> &sc, int width, int height, bool noInputChannel = false) {
+    InputSurface(const sp<SurfaceControl>& sc, int width, int height, bool noInputChannel = false) {
         mSurfaceControl = sc;
 
         mInputFlinger = getInputFlinger();
@@ -130,7 +140,7 @@
         mInputInfo.applicationInfo = aInfo;
     }
 
-    static std::unique_ptr<InputSurface> makeColorInputSurface(const sp<SurfaceComposerClient> &scc,
+    static std::unique_ptr<InputSurface> makeColorInputSurface(const sp<SurfaceComposerClient>& scc,
                                                                int width, int height) {
         sp<SurfaceControl> surfaceControl =
                 scc->createSurface(String8("Test Surface"), 0 /* bufHeight */, 0 /* bufWidth */,
@@ -140,7 +150,7 @@
     }
 
     static std::unique_ptr<InputSurface> makeBufferInputSurface(
-            const sp<SurfaceComposerClient> &scc, int width, int height) {
+            const sp<SurfaceComposerClient>& scc, int width, int height) {
         sp<SurfaceControl> surfaceControl =
                 scc->createSurface(String8("Test Buffer Surface"), width, height,
                                    PIXEL_FORMAT_RGBA_8888, 0 /* flags */);
@@ -148,7 +158,7 @@
     }
 
     static std::unique_ptr<InputSurface> makeContainerInputSurface(
-            const sp<SurfaceComposerClient> &scc, int width, int height) {
+            const sp<SurfaceComposerClient>& scc, int width, int height) {
         sp<SurfaceControl> surfaceControl =
                 scc->createSurface(String8("Test Container Surface"), 0 /* bufHeight */,
                                    0 /* bufWidth */, PIXEL_FORMAT_RGBA_8888,
@@ -157,7 +167,7 @@
     }
 
     static std::unique_ptr<InputSurface> makeContainerInputSurfaceNoInputChannel(
-            const sp<SurfaceComposerClient> &scc, int width, int height) {
+            const sp<SurfaceComposerClient>& scc, int width, int height) {
         sp<SurfaceControl> surfaceControl =
                 scc->createSurface(String8("Test Container Surface"), 100 /* height */,
                                    100 /* width */, PIXEL_FORMAT_RGBA_8888,
@@ -167,7 +177,7 @@
     }
 
     static std::unique_ptr<InputSurface> makeCursorInputSurface(
-            const sp<SurfaceComposerClient> &scc, int width, int height) {
+            const sp<SurfaceComposerClient>& scc, int width, int height) {
         sp<SurfaceControl> surfaceControl =
                 scc->createSurface(String8("Test Cursor Surface"), 0 /* bufHeight */,
                                    0 /* bufWidth */, PIXEL_FORMAT_RGBA_8888,
@@ -178,7 +188,7 @@
     InputEvent* consumeEvent(std::chrono::milliseconds timeout = 3000ms) {
         mClientChannel->waitForMessage(timeout);
 
-        InputEvent *ev;
+        InputEvent* ev;
         uint32_t seqId;
         status_t consumed = mInputConsumer->consume(&mInputEventFactory, true, -1, &seqId, &ev);
         if (consumed != OK) {
@@ -190,10 +200,10 @@
     }
 
     void assertFocusChange(bool hasFocus) {
-        InputEvent *ev = consumeEvent();
+        InputEvent* ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::FOCUS, ev->getType());
-        FocusEvent *focusEvent = static_cast<FocusEvent *>(ev);
+        FocusEvent* focusEvent = static_cast<FocusEvent*>(ev);
         EXPECT_EQ(hasFocus, focusEvent->getHasFocus());
     }
 
@@ -216,10 +226,10 @@
     }
 
     void expectTapWithFlag(int x, int y, int32_t flags) {
-        InputEvent *ev = consumeEvent();
+        InputEvent* ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::MOTION, ev->getType());
-        MotionEvent *mev = static_cast<MotionEvent *>(ev);
+        MotionEvent* mev = static_cast<MotionEvent*>(ev);
         EXPECT_EQ(AMOTION_EVENT_ACTION_DOWN, mev->getAction());
         EXPECT_EQ(x, mev->getX(0));
         EXPECT_EQ(y, mev->getY(0));
@@ -228,18 +238,18 @@
         ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::MOTION, ev->getType());
-        mev = static_cast<MotionEvent *>(ev);
+        mev = static_cast<MotionEvent*>(ev);
         EXPECT_EQ(AMOTION_EVENT_ACTION_UP, mev->getAction());
         EXPECT_EQ(flags, mev->getFlags() & flags);
     }
 
     void expectTapInDisplayCoordinates(int displayX, int displayY) {
-        InputEvent *ev = consumeEvent();
+        InputEvent* ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::MOTION, ev->getType());
-        MotionEvent *mev = static_cast<MotionEvent *>(ev);
+        MotionEvent* mev = static_cast<MotionEvent*>(ev);
         EXPECT_EQ(AMOTION_EVENT_ACTION_DOWN, mev->getAction());
-        const PointerCoords &coords = *mev->getRawPointerCoords(0 /*pointerIndex*/);
+        const PointerCoords& coords = *mev->getRawPointerCoords(0 /*pointerIndex*/);
         EXPECT_EQ(displayX, coords.getX());
         EXPECT_EQ(displayY, coords.getY());
         EXPECT_EQ(0, mev->getFlags() & VERIFIED_MOTION_EVENT_FLAGS);
@@ -247,16 +257,16 @@
         ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::MOTION, ev->getType());
-        mev = static_cast<MotionEvent *>(ev);
+        mev = static_cast<MotionEvent*>(ev);
         EXPECT_EQ(AMOTION_EVENT_ACTION_UP, mev->getAction());
         EXPECT_EQ(0, mev->getFlags() & VERIFIED_MOTION_EVENT_FLAGS);
     }
 
     void expectKey(int32_t keycode) {
-        InputEvent *ev = consumeEvent();
+        InputEvent* ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::KEY, ev->getType());
-        KeyEvent *keyEvent = static_cast<KeyEvent *>(ev);
+        KeyEvent* keyEvent = static_cast<KeyEvent*>(ev);
         EXPECT_EQ(AMOTION_EVENT_ACTION_DOWN, keyEvent->getAction());
         EXPECT_EQ(keycode, keyEvent->getKeyCode());
         EXPECT_EQ(0, keyEvent->getFlags() & VERIFIED_KEY_EVENT_FLAGS);
@@ -264,7 +274,7 @@
         ev = consumeEvent();
         ASSERT_NE(ev, nullptr);
         ASSERT_EQ(InputEventType::KEY, ev->getType());
-        keyEvent = static_cast<KeyEvent *>(ev);
+        keyEvent = static_cast<KeyEvent*>(ev);
         EXPECT_EQ(AMOTION_EVENT_ACTION_UP, keyEvent->getAction());
         EXPECT_EQ(keycode, keyEvent->getKeyCode());
         EXPECT_EQ(0, keyEvent->getFlags() & VERIFIED_KEY_EVENT_FLAGS);
@@ -282,7 +292,7 @@
     }
 
     virtual void doTransaction(
-            std::function<void(SurfaceComposerClient::Transaction &, const sp<SurfaceControl> &)>
+            std::function<void(SurfaceComposerClient::Transaction&, const sp<SurfaceControl>&)>
                     transactionBody) {
         SurfaceComposerClient::Transaction t;
         transactionBody(t, mSurfaceControl);
@@ -303,13 +313,13 @@
         reportedListener->wait();
     }
 
-    void requestFocus(int displayId = ADISPLAY_ID_DEFAULT) {
+    void requestFocus(ui::LogicalDisplayId displayId = ADISPLAY_ID_DEFAULT) {
         SurfaceComposerClient::Transaction t;
         FocusRequest request;
         request.token = mInputInfo.token;
         request.windowName = mInputInfo.name;
         request.timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
-        request.displayId = displayId;
+        request.displayId = displayId.val();
         t.setFocusedWindow(request);
         t.apply(true);
     }
@@ -327,7 +337,7 @@
 
 class BlastInputSurface : public InputSurface {
 public:
-    BlastInputSurface(const sp<SurfaceControl> &sc, const sp<SurfaceControl> &parentSc, int width,
+    BlastInputSurface(const sp<SurfaceControl>& sc, const sp<SurfaceControl>& parentSc, int width,
                       int height)
           : InputSurface(sc, width, height) {
         mParentSurfaceControl = parentSc;
@@ -336,7 +346,7 @@
     ~BlastInputSurface() = default;
 
     static std::unique_ptr<BlastInputSurface> makeBlastInputSurface(
-            const sp<SurfaceComposerClient> &scc, int width, int height) {
+            const sp<SurfaceComposerClient>& scc, int width, int height) {
         sp<SurfaceControl> parentSc =
                 scc->createSurface(String8("Test Parent Surface"), 0 /* bufHeight */,
                                    0 /* bufWidth */, PIXEL_FORMAT_RGBA_8888,
@@ -351,7 +361,7 @@
     }
 
     void doTransaction(
-            std::function<void(SurfaceComposerClient::Transaction &, const sp<SurfaceControl> &)>
+            std::function<void(SurfaceComposerClient::Transaction&, const sp<SurfaceControl>&)>
                     transactionBody) override {
         SurfaceComposerClient::Transaction t;
         transactionBody(t, mParentSurfaceControl);
@@ -378,9 +388,7 @@
 
 class InputSurfacesTest : public ::testing::Test {
 public:
-    InputSurfacesTest() {
-        ProcessState::self()->startThreadPool();
-    }
+    InputSurfacesTest() { ProcessState::self()->startThreadPool(); }
 
     void SetUp() {
         mComposerClient = new SurfaceComposerClient;
@@ -400,15 +408,13 @@
         mBufferPostDelay = static_cast<int32_t>(1e6 / mode.peakRefreshRate) * 3;
     }
 
-    void TearDown() {
-        mComposerClient->dispose();
-    }
+    void TearDown() { mComposerClient->dispose(); }
 
     std::unique_ptr<InputSurface> makeSurface(int width, int height) {
         return InputSurface::makeColorInputSurface(mComposerClient, width, height);
     }
 
-    void postBuffer(const sp<SurfaceControl> &layer, int32_t w, int32_t h) {
+    void postBuffer(const sp<SurfaceControl>& layer, int32_t w, int32_t h) {
         int64_t usageFlags = BufferUsage::CPU_READ_OFTEN | BufferUsage::CPU_WRITE_OFTEN |
                 BufferUsage::COMPOSER_OVERLAY | BufferUsage::GPU_TEXTURE;
         sp<GraphicBuffer> buffer =
@@ -421,11 +427,11 @@
     int32_t mBufferPostDelay;
 };
 
-void injectTapOnDisplay(int x, int y, int displayId) {
+void injectTapOnDisplay(int x, int y, ui::LogicalDisplayId displayId) {
     char *buf1, *buf2, *bufDisplayId;
     asprintf(&buf1, "%d", x);
     asprintf(&buf2, "%d", y);
-    asprintf(&bufDisplayId, "%d", displayId);
+    asprintf(&bufDisplayId, "%d", displayId.val());
     if (fork() == 0) {
         execlp("input", "input", "-d", bufDisplayId, "tap", buf1, buf2, NULL);
     }
@@ -435,10 +441,10 @@
     injectTapOnDisplay(x, y, ADISPLAY_ID_DEFAULT);
 }
 
-void injectKeyOnDisplay(uint32_t keycode, int displayId) {
+void injectKeyOnDisplay(uint32_t keycode, ui::LogicalDisplayId displayId) {
     char *buf1, *bufDisplayId;
     asprintf(&buf1, "%d", keycode);
-    asprintf(&bufDisplayId, "%d", displayId);
+    asprintf(&bufDisplayId, "%d", displayId.val());
     if (fork() == 0) {
         execlp("input", "input", "-d", bufDisplayId, "keyevent", buf1, NULL);
     }
@@ -476,12 +482,8 @@
     injectTap(101, 101);
     surface->expectTap(1, 1);
 
-    surface2->doTransaction([](auto &t, auto &sc) {
-         t.setPosition(sc, 100, 100);
-    });
-    surface->doTransaction([](auto &t, auto &sc) {
-         t.setPosition(sc, 200, 200);
-    });
+    surface2->doTransaction([](auto& t, auto& sc) { t.setPosition(sc, 100, 100); });
+    surface->doTransaction([](auto& t, auto& sc) { t.setPosition(sc, 200, 200); });
 
     injectTap(101, 101);
     surface2->expectTap(1, 1);
@@ -497,23 +499,17 @@
     surface->showAt(10, 10);
     surface2->showAt(10, 10);
 
-    surface->doTransaction([](auto &t, auto &sc) {
-         t.setLayer(sc, LAYER_BASE + 1);
-    });
+    surface->doTransaction([](auto& t, auto& sc) { t.setLayer(sc, LAYER_BASE + 1); });
 
     injectTap(11, 11);
     surface->expectTap(1, 1);
 
-    surface2->doTransaction([](auto &t, auto &sc) {
-         t.setLayer(sc, LAYER_BASE + 1);
-    });
+    surface2->doTransaction([](auto& t, auto& sc) { t.setLayer(sc, LAYER_BASE + 1); });
 
     injectTap(11, 11);
     surface2->expectTap(1, 1);
 
-    surface2->doTransaction([](auto &t, auto &sc) {
-         t.hide(sc);
-    });
+    surface2->doTransaction([](auto& t, auto& sc) { t.hide(sc); });
 
     injectTap(11, 11);
     surface->expectTap(1, 1);
@@ -562,7 +558,7 @@
     childSurface->mInputInfo.surfaceInset = 10;
     childSurface->showAt(100, 100);
 
-    childSurface->doTransaction([&](auto &t, auto &sc) {
+    childSurface->doTransaction([&](auto& t, auto& sc) {
         t.setPosition(sc, -5, -5);
         t.reparent(sc, parentSurface->mSurfaceControl);
     });
@@ -583,7 +579,7 @@
     fgSurface->mInputInfo.surfaceInset = 5;
     fgSurface->showAt(100, 100);
 
-    fgSurface->doTransaction([&](auto &t, auto &sc) { t.setMatrix(sc, 2.0, 0, 0, 4.0); });
+    fgSurface->doTransaction([&](auto& t, auto& sc) { t.setMatrix(sc, 2.0, 0, 0, 4.0); });
 
     // expect = touch / scale - inset
     injectTap(112, 124);
@@ -602,7 +598,7 @@
     fgSurface->mInputInfo.surfaceInset = INT32_MAX;
     fgSurface->showAt(100, 100);
 
-    fgSurface->doTransaction([&](auto &t, auto &sc) { t.setMatrix(sc, 2.0, 0, 0, 2.0); });
+    fgSurface->doTransaction([&](auto& t, auto& sc) { t.setMatrix(sc, 2.0, 0, 0, 2.0); });
 
     // expect no crash for overflow, and inset size to be clamped to surface size
     injectTap(112, 124);
@@ -651,7 +647,7 @@
     fgSurface->mInputInfo.touchableRegion.orSelf(Rect{INT32_MIN, INT32_MIN, INT32_MAX, INT32_MAX});
     fgSurface->showAt(0, 0);
 
-    fgSurface->doTransaction([&](auto &t, auto &sc) { t.setMatrix(sc, 2.0, 0, 0, 2.0); });
+    fgSurface->doTransaction([&](auto& t, auto& sc) { t.setMatrix(sc, 2.0, 0, 0, 2.0); });
 
     // Expect no crash for overflow.
     injectTap(12, 24);
@@ -661,7 +657,7 @@
 // Ensure we ignore transparent region when getting screen bounds when positioning input frame.
 TEST_F(InputSurfacesTest, input_ignores_transparent_region) {
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         Region transparentRegion(Rect(0, 0, 10, 10));
         t.setTransparentRegionHint(sc, transparentRegion);
     });
@@ -702,7 +698,7 @@
     injectTap(11, 11);
     bufferSurface->expectTap(1, 1);
 
-    bufferSurface->doTransaction([](auto &t, auto &sc) { t.setAlpha(sc, 0.0); });
+    bufferSurface->doTransaction([](auto& t, auto& sc) { t.setAlpha(sc, 0.0); });
 
     injectTap(11, 11);
     bgSurface->expectTap(1, 1);
@@ -718,7 +714,7 @@
     injectTap(11, 11);
     fgSurface->expectTap(1, 1);
 
-    fgSurface->doTransaction([](auto &t, auto &sc) { t.setAlpha(sc, 0.0); });
+    fgSurface->doTransaction([](auto& t, auto& sc) { t.setAlpha(sc, 0.0); });
 
     injectTap(11, 11);
     fgSurface->expectTap(1, 1);
@@ -735,7 +731,7 @@
     injectTap(11, 11);
     containerSurface->expectTap(1, 1);
 
-    containerSurface->doTransaction([](auto &t, auto &sc) { t.hide(sc); });
+    containerSurface->doTransaction([](auto& t, auto& sc) { t.hide(sc); });
 
     injectTap(11, 11);
     bgSurface->expectTap(1, 1);
@@ -775,19 +771,19 @@
 TEST_F(InputSurfacesTest, rotate_surface) {
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->showAt(10, 10);
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, 0, 1, -1, 0); // 90 degrees
     });
     injectTap(8, 11);
     surface->expectTap(1, 2);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, -1, 0, 0, -1); // 180 degrees
     });
     injectTap(9, 8);
     surface->expectTap(1, 2);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, 0, -1, 1, 0); // 270 degrees
     });
     injectTap(12, 9);
@@ -797,19 +793,19 @@
 TEST_F(InputSurfacesTest, rotate_surface_with_scale) {
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->showAt(10, 10);
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, 0, 2, -4, 0); // 90 degrees
     });
     injectTap(2, 12);
     surface->expectTap(1, 2);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, -2, 0, 0, -4); // 180 degrees
     });
     injectTap(8, 2);
     surface->expectTap(1, 2);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, 0, -2, 4, 0); // 270 degrees
     });
     injectTap(18, 8);
@@ -821,19 +817,19 @@
     surface->mInputInfo.surfaceInset = 5;
     surface->showAt(100, 100);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, 0, 2, -4, 0); // 90 degrees
     });
     injectTap(40, 120);
     surface->expectTap(5, 10);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, -2, 0, 0, -4); // 180 degrees
     });
     injectTap(80, 40);
     surface->expectTap(5, 10);
 
-    surface->doTransaction([](auto &t, auto &sc) {
+    surface->doTransaction([](auto& t, auto& sc) {
         t.setMatrix(sc, 0, -2, 4, 0); // 270 degrees
     });
     injectTap(160, 80);
@@ -874,7 +870,7 @@
     nonTouchableSurface->showAt(0, 0);
     parentSurface->showAt(100, 100);
 
-    nonTouchableSurface->doTransaction([&](auto &t, auto &sc) {
+    nonTouchableSurface->doTransaction([&](auto& t, auto& sc) {
         t.setCrop(parentSurface->mSurfaceControl, Rect(0, 0, 50, 50));
         t.reparent(sc, parentSurface->mSurfaceControl);
     });
@@ -898,7 +894,7 @@
     nonTouchableSurface->showAt(0, 0);
     parentSurface->showAt(50, 50);
 
-    nonTouchableSurface->doTransaction([&](auto &t, auto &sc) {
+    nonTouchableSurface->doTransaction([&](auto& t, auto& sc) {
         t.setCrop(parentSurface->mSurfaceControl, Rect(0, 0, 50, 50));
         t.reparent(sc, parentSurface->mSurfaceControl);
     });
@@ -940,7 +936,7 @@
 TEST_F(InputSurfacesTest, strict_unobscured_input_unobscured_window) {
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->doTransaction(
-            [&](auto &t, auto &sc) { t.setDropInputMode(sc, gui::DropInputMode::OBSCURED); });
+            [&](auto& t, auto& sc) { t.setDropInputMode(sc, gui::DropInputMode::OBSCURED); });
     surface->showAt(100, 100);
 
     injectTap(101, 101);
@@ -954,7 +950,7 @@
 
 TEST_F(InputSurfacesTest, strict_unobscured_input_scaled_without_crop_window) {
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) {
+    surface->doTransaction([&](auto& t, auto& sc) {
         t.setDropInputMode(sc, gui::DropInputMode::OBSCURED);
         t.setMatrix(sc, 2.0, 0, 0, 2.0);
     });
@@ -973,7 +969,7 @@
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->mInputInfo.ownerUid = gui::Uid{11111};
     surface->doTransaction(
-            [&](auto &t, auto &sc) { t.setDropInputMode(sc, gui::DropInputMode::OBSCURED); });
+            [&](auto& t, auto& sc) { t.setDropInputMode(sc, gui::DropInputMode::OBSCURED); });
     surface->showAt(100, 100);
     std::unique_ptr<InputSurface> obscuringSurface = makeSurface(100, 100);
     obscuringSurface->mInputInfo.setInputConfig(WindowInfo::InputConfig::NOT_TOUCHABLE, true);
@@ -992,7 +988,7 @@
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->mInputInfo.ownerUid = gui::Uid{11111};
     surface->doTransaction(
-            [&](auto &t, auto &sc) { t.setDropInputMode(sc, gui::DropInputMode::OBSCURED); });
+            [&](auto& t, auto& sc) { t.setDropInputMode(sc, gui::DropInputMode::OBSCURED); });
     surface->showAt(100, 100);
     std::unique_ptr<InputSurface> obscuringSurface = makeSurface(100, 100);
     obscuringSurface->mInputInfo.setInputConfig(WindowInfo::InputConfig::NOT_TOUCHABLE, true);
@@ -1015,7 +1011,7 @@
 
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->showAt(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) {
+    surface->doTransaction([&](auto& t, auto& sc) {
         t.setDropInputMode(sc, gui::DropInputMode::OBSCURED);
         t.reparent(sc, parentSurface->mSurfaceControl);
         t.setAlpha(parentSurface->mSurfaceControl, 0.9f);
@@ -1036,7 +1032,7 @@
     parentSurface->showAt(0, 0, Rect(0, 0, 300, 300));
 
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) {
+    surface->doTransaction([&](auto& t, auto& sc) {
         t.setDropInputMode(sc, gui::DropInputMode::OBSCURED);
         t.reparent(sc, parentSurface->mSurfaceControl);
         t.setCrop(parentSurface->mSurfaceControl, Rect(10, 10, 100, 100));
@@ -1070,7 +1066,7 @@
 TEST_F(InputSurfacesTest, drop_input_policy) {
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
     surface->doTransaction(
-            [&](auto &t, auto &sc) { t.setDropInputMode(sc, gui::DropInputMode::ALL); });
+            [&](auto& t, auto& sc) { t.setDropInputMode(sc, gui::DropInputMode::ALL); });
     surface->showAt(100, 100);
 
     injectTap(101, 101);
@@ -1102,7 +1098,7 @@
     std::unique_ptr<InputSurface> containerSurface =
             InputSurface::makeContainerInputSurface(mComposerClient, 100, 100);
     containerSurface->doTransaction(
-            [&](auto &t, auto &sc) { t.reparent(sc, parentContainer->mSurfaceControl); });
+            [&](auto& t, auto& sc) { t.reparent(sc, parentContainer->mSurfaceControl); });
     containerSurface->mInputInfo.replaceTouchableRegionWithCrop = true;
     containerSurface->mInputInfo.touchableRegionCropHandle = nullptr;
     parentContainer->showAt(10, 10, Rect(0, 0, 20, 20));
@@ -1127,7 +1123,7 @@
     std::unique_ptr<InputSurface> containerSurface =
             InputSurface::makeContainerInputSurface(mComposerClient, 100, 100);
     containerSurface->doTransaction(
-            [&](auto &t, auto &sc) { t.reparent(sc, parentContainer->mSurfaceControl); });
+            [&](auto& t, auto& sc) { t.reparent(sc, parentContainer->mSurfaceControl); });
     containerSurface->mInputInfo.replaceTouchableRegionWithCrop = true;
     containerSurface->mInputInfo.touchableRegionCropHandle = nullptr;
     parentContainer->showAt(10, 10, Rect(0, 0, 20, 20));
@@ -1179,7 +1175,7 @@
             InputSurface::makeContainerInputSurfaceNoInputChannel(mComposerClient, 100, 100);
     childContainerSurface->showAt(0, 0);
     childContainerSurface->doTransaction(
-            [&](auto &t, auto &sc) { t.reparent(sc, parent->mSurfaceControl); });
+            [&](auto& t, auto& sc) { t.reparent(sc, parent->mSurfaceControl); });
     injectTap(101, 101);
 
     parent->assertNoEvent();
@@ -1188,8 +1184,9 @@
 class MultiDisplayTests : public InputSurfacesTest {
 public:
     MultiDisplayTests() : InputSurfacesTest() { ProcessState::self()->startThreadPool(); }
+
     void TearDown() override {
-        for (auto &token : mVirtualDisplays) {
+        for (auto& token : mVirtualDisplays) {
             SurfaceComposerClient::destroyDisplay(token);
         }
         InputSurfacesTest::TearDown();
@@ -1226,18 +1223,18 @@
     ui::LayerStack layerStack = ui::LayerStack::fromValue(42);
     // Do not create a display associated with the LayerStack.
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) { t.setLayerStack(sc, layerStack); });
+    surface->doTransaction([&](auto& t, auto& sc) { t.setLayerStack(sc, layerStack); });
     surface->showAt(100, 100);
 
     // Touches should be dropped if the layer is on an invalid display.
-    injectTapOnDisplay(101, 101, layerStack.id);
+    injectTapOnDisplay(101, 101, toDisplayId(layerStack));
     surface->assertNoEvent();
 
     // However, we still let the window be focused and receive keys.
-    surface->requestFocus(layerStack.id);
+    surface->requestFocus(toDisplayId(layerStack));
     surface->assertFocusChange(true);
 
-    injectKeyOnDisplay(AKEYCODE_V, layerStack.id);
+    injectKeyOnDisplay(AKEYCODE_V, toDisplayId(layerStack));
     surface->expectKey(AKEYCODE_V);
 }
 
@@ -1245,15 +1242,15 @@
     ui::LayerStack layerStack = ui::LayerStack::fromValue(42);
     createDisplay(1000, 1000, false /*isSecure*/, layerStack);
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) { t.setLayerStack(sc, layerStack); });
+    surface->doTransaction([&](auto& t, auto& sc) { t.setLayerStack(sc, layerStack); });
     surface->showAt(100, 100);
 
-    injectTapOnDisplay(101, 101, layerStack.id);
+    injectTapOnDisplay(101, 101, toDisplayId(layerStack));
     surface->expectTap(1, 1);
 
-    surface->requestFocus(layerStack.id);
+    surface->requestFocus(toDisplayId(layerStack));
     surface->assertFocusChange(true);
-    injectKeyOnDisplay(AKEYCODE_V, layerStack.id);
+    injectKeyOnDisplay(AKEYCODE_V, toDisplayId(layerStack));
     surface->expectKey(AKEYCODE_V);
 }
 
@@ -1261,19 +1258,19 @@
     ui::LayerStack layerStack = ui::LayerStack::fromValue(42);
     createDisplay(1000, 1000, false /*isSecure*/, layerStack);
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) {
+    surface->doTransaction([&](auto& t, auto& sc) {
         t.setFlags(sc, layer_state_t::eLayerSecure, layer_state_t::eLayerSecure);
         t.setLayerStack(sc, layerStack);
     });
     surface->showAt(100, 100);
 
-    injectTapOnDisplay(101, 101, layerStack.id);
+    injectTapOnDisplay(101, 101, toDisplayId(layerStack));
 
     surface->assertNoEvent();
 
-    surface->requestFocus(layerStack.id);
+    surface->requestFocus(toDisplayId(layerStack));
     surface->assertFocusChange(true);
-    injectKeyOnDisplay(AKEYCODE_V, layerStack.id);
+    injectKeyOnDisplay(AKEYCODE_V, toDisplayId(layerStack));
     surface->assertNoEvent();
 }
 
@@ -1287,20 +1284,21 @@
     seteuid(AID_ROOT);
 
     std::unique_ptr<InputSurface> surface = makeSurface(100, 100);
-    surface->doTransaction([&](auto &t, auto &sc) {
+    surface->doTransaction([&](auto& t, auto& sc) {
         t.setFlags(sc, layer_state_t::eLayerSecure, layer_state_t::eLayerSecure);
         t.setLayerStack(sc, layerStack);
     });
     surface->showAt(100, 100);
 
-    injectTapOnDisplay(101, 101, layerStack.id);
+    injectTapOnDisplay(101, 101, toDisplayId(layerStack));
     surface->expectTap(1, 1);
 
-    surface->requestFocus(layerStack.id);
+    surface->requestFocus(toDisplayId(layerStack));
     surface->assertFocusChange(true);
-    injectKeyOnDisplay(AKEYCODE_V, layerStack.id);
+    injectKeyOnDisplay(AKEYCODE_V, toDisplayId(layerStack));
 
     surface->expectKey(AKEYCODE_V);
 }
 
-} // namespace android::test
+} // namespace test
+} // namespace android
diff --git a/libs/gui/tests/WindowInfo_test.cpp b/libs/gui/tests/WindowInfo_test.cpp
index 5eb5d3b..ce22082 100644
--- a/libs/gui/tests/WindowInfo_test.cpp
+++ b/libs/gui/tests/WindowInfo_test.cpp
@@ -64,7 +64,7 @@
     i.ownerUid = gui::Uid{24};
     i.packageName = "com.example.package";
     i.inputConfig = WindowInfo::InputConfig::NOT_FOCUSABLE;
-    i.displayId = 34;
+    i.displayId = ui::LogicalDisplayId{34};
     i.replaceTouchableRegionWithCrop = true;
     i.touchableRegionCropHandle = touchableRegionCropHandle;
     i.applicationInfo.name = "ApplicationFooBar";
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 61a964e..d271563 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -27,7 +27,6 @@
 #include <android-base/logging.h>
 #include <android-base/stringprintf.h>
 #include <cutils/compiler.h>
-#include <gui/constants.h>
 #include <input/DisplayViewport.h>
 #include <input/Input.h>
 #include <input/InputDevice.h>
@@ -293,8 +292,8 @@
             event.getButtonState()};
 }
 
-void InputEvent::initialize(int32_t id, int32_t deviceId, uint32_t source, int32_t displayId,
-                            std::array<uint8_t, 32> hmac) {
+void InputEvent::initialize(int32_t id, int32_t deviceId, uint32_t source,
+                            ui::LogicalDisplayId displayId, std::array<uint8_t, 32> hmac) {
     mId = id;
     mDeviceId = deviceId;
     mSource = source;
@@ -356,10 +355,11 @@
     return InputEventLookup::getKeyCodeByLabel(label);
 }
 
-void KeyEvent::initialize(int32_t id, int32_t deviceId, uint32_t source, int32_t displayId,
-                          std::array<uint8_t, 32> hmac, int32_t action, int32_t flags,
-                          int32_t keyCode, int32_t scanCode, int32_t metaState, int32_t repeatCount,
-                          nsecs_t downTime, nsecs_t eventTime) {
+void KeyEvent::initialize(int32_t id, int32_t deviceId, uint32_t source,
+                          ui::LogicalDisplayId displayId, std::array<uint8_t, 32> hmac,
+                          int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
+                          int32_t metaState, int32_t repeatCount, nsecs_t downTime,
+                          nsecs_t eventTime) {
     InputEvent::initialize(id, deviceId, source, displayId, hmac);
     mAction = action;
     mFlags = flags;
@@ -556,14 +556,15 @@
 
 // --- MotionEvent ---
 
-void MotionEvent::initialize(int32_t id, int32_t deviceId, uint32_t source, int32_t displayId,
-                             std::array<uint8_t, 32> hmac, int32_t action, int32_t actionButton,
-                             int32_t flags, int32_t edgeFlags, int32_t metaState,
-                             int32_t buttonState, MotionClassification classification,
-                             const ui::Transform& transform, float xPrecision, float yPrecision,
-                             float rawXCursorPosition, float rawYCursorPosition,
-                             const ui::Transform& rawTransform, nsecs_t downTime, nsecs_t eventTime,
-                             size_t pointerCount, const PointerProperties* pointerProperties,
+void MotionEvent::initialize(int32_t id, int32_t deviceId, uint32_t source,
+                             ui::LogicalDisplayId displayId, std::array<uint8_t, 32> hmac,
+                             int32_t action, int32_t actionButton, int32_t flags, int32_t edgeFlags,
+                             int32_t metaState, int32_t buttonState,
+                             MotionClassification classification, const ui::Transform& transform,
+                             float xPrecision, float yPrecision, float rawXCursorPosition,
+                             float rawYCursorPosition, const ui::Transform& rawTransform,
+                             nsecs_t downTime, nsecs_t eventTime, size_t pointerCount,
+                             const PointerProperties* pointerProperties,
                              const PointerCoords* pointerCoords) {
     InputEvent::initialize(id, deviceId, source, displayId, hmac);
     mAction = action;
@@ -835,7 +836,7 @@
     mId = parcel->readInt32();
     mDeviceId = parcel->readInt32();
     mSource = parcel->readUint32();
-    mDisplayId = parcel->readInt32();
+    mDisplayId = ui::LogicalDisplayId{parcel->readInt32()};
     std::vector<uint8_t> hmac;
     status_t result = parcel->readByteVector(&hmac);
     if (result != OK || hmac.size() != 32) {
@@ -903,7 +904,7 @@
     parcel->writeInt32(mId);
     parcel->writeInt32(mDeviceId);
     parcel->writeUint32(mSource);
-    parcel->writeInt32(mDisplayId);
+    parcel->writeInt32(mDisplayId.val());
     std::vector<uint8_t> hmac(mHmac.begin(), mHmac.end());
     parcel->writeByteVector(hmac);
     parcel->writeInt32(mAction);
@@ -1203,7 +1204,7 @@
 
 void FocusEvent::initialize(int32_t id, bool hasFocus) {
     InputEvent::initialize(id, ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID, AINPUT_SOURCE_UNKNOWN,
-                           ADISPLAY_ID_NONE, INVALID_HMAC);
+                           ui::ADISPLAY_ID_NONE, INVALID_HMAC);
     mHasFocus = hasFocus;
 }
 
@@ -1216,7 +1217,7 @@
 
 void CaptureEvent::initialize(int32_t id, bool pointerCaptureEnabled) {
     InputEvent::initialize(id, ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID, AINPUT_SOURCE_UNKNOWN,
-                           ADISPLAY_ID_NONE, INVALID_HMAC);
+                           ui::ADISPLAY_ID_NONE, INVALID_HMAC);
     mPointerCaptureEnabled = pointerCaptureEnabled;
 }
 
@@ -1229,7 +1230,7 @@
 
 void DragEvent::initialize(int32_t id, float x, float y, bool isExiting) {
     InputEvent::initialize(id, ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID, AINPUT_SOURCE_UNKNOWN,
-                           ADISPLAY_ID_NONE, INVALID_HMAC);
+                           ui::ADISPLAY_ID_NONE, INVALID_HMAC);
     mIsExiting = isExiting;
     mX = x;
     mY = y;
@@ -1246,7 +1247,7 @@
 
 void TouchModeEvent::initialize(int32_t id, bool isInTouchMode) {
     InputEvent::initialize(id, ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID, AINPUT_SOURCE_UNKNOWN,
-                           ADISPLAY_ID_NONE, INVALID_HMAC);
+                           ui::ADISPLAY_ID_NONE, INVALID_HMAC);
     mIsInTouchMode = isInTouchMode;
 }
 
diff --git a/libs/input/InputConsumer.cpp b/libs/input/InputConsumer.cpp
index be2110e..abc0392 100644
--- a/libs/input/InputConsumer.cpp
+++ b/libs/input/InputConsumer.cpp
@@ -81,10 +81,10 @@
 
 void initializeKeyEvent(KeyEvent& event, const InputMessage& msg) {
     event.initialize(msg.body.key.eventId, msg.body.key.deviceId, msg.body.key.source,
-                     msg.body.key.displayId, msg.body.key.hmac, msg.body.key.action,
-                     msg.body.key.flags, msg.body.key.keyCode, msg.body.key.scanCode,
-                     msg.body.key.metaState, msg.body.key.repeatCount, msg.body.key.downTime,
-                     msg.body.key.eventTime);
+                     ui::LogicalDisplayId{msg.body.key.displayId}, msg.body.key.hmac,
+                     msg.body.key.action, msg.body.key.flags, msg.body.key.keyCode,
+                     msg.body.key.scanCode, msg.body.key.metaState, msg.body.key.repeatCount,
+                     msg.body.key.downTime, msg.body.key.eventTime);
 }
 
 void initializeFocusEvent(FocusEvent& event, const InputMessage& msg) {
@@ -117,13 +117,14 @@
                           msg.body.motion.dtdyRaw, msg.body.motion.dsdyRaw, msg.body.motion.tyRaw,
                           0, 0, 1});
     event.initialize(msg.body.motion.eventId, msg.body.motion.deviceId, msg.body.motion.source,
-                     msg.body.motion.displayId, msg.body.motion.hmac, msg.body.motion.action,
-                     msg.body.motion.actionButton, msg.body.motion.flags, msg.body.motion.edgeFlags,
-                     msg.body.motion.metaState, msg.body.motion.buttonState,
-                     msg.body.motion.classification, transform, msg.body.motion.xPrecision,
-                     msg.body.motion.yPrecision, msg.body.motion.xCursorPosition,
-                     msg.body.motion.yCursorPosition, displayTransform, msg.body.motion.downTime,
-                     msg.body.motion.eventTime, pointerCount, pointerProperties, pointerCoords);
+                     ui::LogicalDisplayId{msg.body.motion.displayId}, msg.body.motion.hmac,
+                     msg.body.motion.action, msg.body.motion.actionButton, msg.body.motion.flags,
+                     msg.body.motion.edgeFlags, msg.body.motion.metaState,
+                     msg.body.motion.buttonState, msg.body.motion.classification, transform,
+                     msg.body.motion.xPrecision, msg.body.motion.yPrecision,
+                     msg.body.motion.xCursorPosition, msg.body.motion.yCursorPosition,
+                     displayTransform, msg.body.motion.downTime, msg.body.motion.eventTime,
+                     pointerCount, pointerProperties, pointerCoords);
 }
 
 void addSample(MotionEvent& event, const InputMessage& msg) {
diff --git a/libs/input/InputConsumerNoResampling.cpp b/libs/input/InputConsumerNoResampling.cpp
index 76f2b4a..15d992f 100644
--- a/libs/input/InputConsumerNoResampling.cpp
+++ b/libs/input/InputConsumerNoResampling.cpp
@@ -47,10 +47,10 @@
 std::unique_ptr<KeyEvent> createKeyEvent(const InputMessage& msg) {
     std::unique_ptr<KeyEvent> event = std::make_unique<KeyEvent>();
     event->initialize(msg.body.key.eventId, msg.body.key.deviceId, msg.body.key.source,
-                      msg.body.key.displayId, msg.body.key.hmac, msg.body.key.action,
-                      msg.body.key.flags, msg.body.key.keyCode, msg.body.key.scanCode,
-                      msg.body.key.metaState, msg.body.key.repeatCount, msg.body.key.downTime,
-                      msg.body.key.eventTime);
+                      ui::LogicalDisplayId{msg.body.key.displayId}, msg.body.key.hmac,
+                      msg.body.key.action, msg.body.key.flags, msg.body.key.keyCode,
+                      msg.body.key.scanCode, msg.body.key.metaState, msg.body.key.repeatCount,
+                      msg.body.key.downTime, msg.body.key.eventTime);
     return event;
 }
 
@@ -93,8 +93,8 @@
                           msg.body.motion.dtdyRaw, msg.body.motion.dsdyRaw, msg.body.motion.tyRaw,
                           0, 0, 1});
     event->initialize(msg.body.motion.eventId, msg.body.motion.deviceId, msg.body.motion.source,
-                      msg.body.motion.displayId, msg.body.motion.hmac, msg.body.motion.action,
-                      msg.body.motion.actionButton, msg.body.motion.flags,
+                      ui::LogicalDisplayId{msg.body.motion.displayId}, msg.body.motion.hmac,
+                      msg.body.motion.action, msg.body.motion.actionButton, msg.body.motion.flags,
                       msg.body.motion.edgeFlags, msg.body.motion.metaState,
                       msg.body.motion.buttonState, msg.body.motion.classification, transform,
                       msg.body.motion.xPrecision, msg.body.motion.yPrecision,
diff --git a/libs/input/InputDevice.cpp b/libs/input/InputDevice.cpp
index 222647d..50239a1 100644
--- a/libs/input/InputDevice.cpp
+++ b/libs/input/InputDevice.cpp
@@ -23,7 +23,6 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <ftl/enum.h>
-#include <gui/constants.h>
 #include <input/InputDevice.h>
 #include <input/InputEventLabels.h>
 
@@ -170,7 +169,7 @@
 // --- InputDeviceInfo ---
 
 InputDeviceInfo::InputDeviceInfo() {
-    initialize(-1, 0, -1, InputDeviceIdentifier(), "", false, false, ADISPLAY_ID_NONE);
+    initialize(-1, 0, -1, InputDeviceIdentifier(), "", false, false, ui::ADISPLAY_ID_NONE);
 }
 
 InputDeviceInfo::InputDeviceInfo(const InputDeviceInfo& other)
@@ -202,7 +201,8 @@
 
 void InputDeviceInfo::initialize(int32_t id, int32_t generation, int32_t controllerNumber,
                                  const InputDeviceIdentifier& identifier, const std::string& alias,
-                                 bool isExternal, bool hasMic, int32_t associatedDisplayId,
+                                 bool isExternal, bool hasMic,
+                                 ui::LogicalDisplayId associatedDisplayId,
                                  InputDeviceViewBehavior viewBehavior, bool enabled) {
     mId = id;
     mGeneration = generation;
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index 3ca6ccc..47b4228 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -530,7 +530,7 @@
 }
 
 status_t InputPublisher::publishKeyEvent(uint32_t seq, int32_t eventId, int32_t deviceId,
-                                         int32_t source, int32_t displayId,
+                                         int32_t source, ui::LogicalDisplayId displayId,
                                          std::array<uint8_t, 32> hmac, int32_t action,
                                          int32_t flags, int32_t keyCode, int32_t scanCode,
                                          int32_t metaState, int32_t repeatCount, nsecs_t downTime,
@@ -558,7 +558,7 @@
     msg.body.key.eventId = eventId;
     msg.body.key.deviceId = deviceId;
     msg.body.key.source = source;
-    msg.body.key.displayId = displayId;
+    msg.body.key.displayId = displayId.val();
     msg.body.key.hmac = std::move(hmac);
     msg.body.key.action = action;
     msg.body.key.flags = flags;
@@ -572,11 +572,11 @@
 }
 
 status_t InputPublisher::publishMotionEvent(
-        uint32_t seq, int32_t eventId, int32_t deviceId, int32_t source, int32_t displayId,
-        std::array<uint8_t, 32> hmac, int32_t action, int32_t actionButton, int32_t flags,
-        int32_t edgeFlags, int32_t metaState, int32_t buttonState,
-        MotionClassification classification, const ui::Transform& transform, float xPrecision,
-        float yPrecision, float xCursorPosition, float yCursorPosition,
+        uint32_t seq, int32_t eventId, int32_t deviceId, int32_t source,
+        ui::LogicalDisplayId displayId, std::array<uint8_t, 32> hmac, int32_t action,
+        int32_t actionButton, int32_t flags, int32_t edgeFlags, int32_t metaState,
+        int32_t buttonState, MotionClassification classification, const ui::Transform& transform,
+        float xPrecision, float yPrecision, float xCursorPosition, float yCursorPosition,
         const ui::Transform& rawTransform, nsecs_t downTime, nsecs_t eventTime,
         uint32_t pointerCount, const PointerProperties* pointerProperties,
         const PointerCoords* pointerCoords) {
@@ -596,13 +596,13 @@
         std::string transformString;
         transform.dump(transformString, "transform", "        ");
         ALOGD("channel '%s' publisher ~ %s: seq=%u, id=%d, deviceId=%d, source=%s, "
-              "displayId=%" PRId32 ", "
+              "displayId=%s, "
               "action=%s, actionButton=0x%08x, flags=0x%x, edgeFlags=0x%x, "
               "metaState=0x%x, buttonState=0x%x, classification=%s,"
               "xPrecision=%f, yPrecision=%f, downTime=%" PRId64 ", eventTime=%" PRId64 ", "
               "pointerCount=%" PRIu32 "\n%s",
               mChannel->getName().c_str(), __func__, seq, eventId, deviceId,
-              inputEventSourceToString(source).c_str(), displayId,
+              inputEventSourceToString(source).c_str(), displayId.toString().c_str(),
               MotionEvent::actionToString(action).c_str(), actionButton, flags, edgeFlags,
               metaState, buttonState, motionClassificationToString(classification), xPrecision,
               yPrecision, downTime, eventTime, pointerCount, transformString.c_str());
@@ -625,7 +625,7 @@
     msg.body.motion.eventId = eventId;
     msg.body.motion.deviceId = deviceId;
     msg.body.motion.source = source;
-    msg.body.motion.displayId = displayId;
+    msg.body.motion.displayId = displayId.val();
     msg.body.motion.hmac = std::move(hmac);
     msg.body.motion.action = action;
     msg.body.motion.actionButton = actionButton;
diff --git a/libs/input/KeyCharacterMap.cpp b/libs/input/KeyCharacterMap.cpp
index e2feabc..41909bf 100644
--- a/libs/input/KeyCharacterMap.cpp
+++ b/libs/input/KeyCharacterMap.cpp
@@ -28,7 +28,6 @@
 #include <input/KeyCharacterMap.h>
 #include <input/Keyboard.h>
 
-#include <gui/constants.h>
 #include <utils/Errors.h>
 #include <utils/Log.h>
 #include <utils/Timers.h>
@@ -496,11 +495,11 @@
     return false;
 }
 
-void KeyCharacterMap::addKey(Vector<KeyEvent>& outEvents,
-        int32_t deviceId, int32_t keyCode, int32_t metaState, bool down, nsecs_t time) {
+void KeyCharacterMap::addKey(Vector<KeyEvent>& outEvents, int32_t deviceId, int32_t keyCode,
+                             int32_t metaState, bool down, nsecs_t time) {
     outEvents.push();
     KeyEvent& event = outEvents.editTop();
-    event.initialize(InputEvent::nextId(), deviceId, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE,
+    event.initialize(InputEvent::nextId(), deviceId, AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_NONE,
                      INVALID_HMAC, down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP, 0, keyCode,
                      0, metaState, 0, time, time);
 }
diff --git a/libs/input/tests/InputEvent_test.cpp b/libs/input/tests/InputEvent_test.cpp
index 0df06b7..cc2574d 100644
--- a/libs/input/tests/InputEvent_test.cpp
+++ b/libs/input/tests/InputEvent_test.cpp
@@ -21,14 +21,13 @@
 #include <attestation/HmacKeyManager.h>
 #include <binder/Parcel.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/Input.h>
 #include <input/InputEventBuilders.h>
 
 namespace android {
 
 // Default display id.
-static constexpr int32_t DISPLAY_ID = ADISPLAY_ID_DEFAULT;
+static constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
 
 static constexpr float EPSILON = MotionEvent::ROUNDING_PRECISION;
 
@@ -229,7 +228,7 @@
     ASSERT_EQ(AINPUT_SOURCE_JOYSTICK, event.getSource());
 
     // Set display id.
-    constexpr int32_t newDisplayId = 2;
+    constexpr ui::LogicalDisplayId newDisplayId = ui::LogicalDisplayId{2};
     event.setDisplayId(newDisplayId);
     ASSERT_EQ(newDisplayId, event.getDisplayId());
 }
@@ -528,7 +527,7 @@
     ASSERT_EQ(AINPUT_SOURCE_JOYSTICK, event.getSource());
 
     // Set displayId.
-    constexpr int32_t newDisplayId = 2;
+    constexpr ui::LogicalDisplayId newDisplayId = ui::LogicalDisplayId{2};
     event.setDisplayId(newDisplayId);
     ASSERT_EQ(newDisplayId, event.getDisplayId());
 
@@ -860,7 +859,7 @@
     nsecs_t eventTime = systemTime(SYSTEM_TIME_MONOTONIC);
     MotionEvent event;
     event.initialize(InputEvent::nextId(), /* deviceId */ 1, source,
-                     /* displayId */ 0, INVALID_HMAC, action,
+                     /* displayId */ ui::ADISPLAY_ID_DEFAULT, INVALID_HMAC, action,
                      /* actionButton */ 0, /* flags */ 0, /* edgeFlags */ 0, AMETA_NONE,
                      /* buttonState */ 0, MotionClassification::NONE, transform,
                      /* xPrecision */ 0, /* yPrecision */ 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
diff --git a/libs/input/tests/InputPublisherAndConsumerNoResampling_test.cpp b/libs/input/tests/InputPublisherAndConsumerNoResampling_test.cpp
index 6593497..7ae1cd8 100644
--- a/libs/input/tests/InputPublisherAndConsumerNoResampling_test.cpp
+++ b/libs/input/tests/InputPublisherAndConsumerNoResampling_test.cpp
@@ -18,7 +18,6 @@
 #include <attestation/HmacKeyManager.h>
 #include <ftl/enum.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/BlockingQueue.h>
 #include <input/InputConsumerNoResampling.h>
 #include <input/InputTransport.h>
@@ -56,7 +55,7 @@
     const int32_t eventId;
     const int32_t deviceId = 1;
     const uint32_t source = AINPUT_SOURCE_TOUCHSCREEN;
-    const int32_t displayId = ADISPLAY_ID_DEFAULT;
+    const ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_DEFAULT;
     const int32_t actionButton = 0;
     const int32_t edgeFlags = AMOTION_EVENT_EDGE_FLAG_TOP;
     const int32_t metaState = AMETA_ALT_LEFT_ON | AMETA_ALT_ON;
@@ -446,7 +445,7 @@
     int32_t eventId = InputEvent::nextId();
     constexpr int32_t deviceId = 1;
     constexpr uint32_t source = AINPUT_SOURCE_KEYBOARD;
-    constexpr int32_t displayId = ADISPLAY_ID_DEFAULT;
+    constexpr ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_DEFAULT;
     constexpr std::array<uint8_t, 32> hmac = {31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21,
                                               20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10,
                                               9,  8,  7,  6,  5,  4,  3,  2,  1,  0};
@@ -738,9 +737,10 @@
 
     ui::Transform identityTransform;
     status =
-            mPublisher->publishMotionEvent(0, InputEvent::nextId(), 0, 0, 0, INVALID_HMAC, 0, 0, 0,
-                                           0, 0, 0, MotionClassification::NONE, identityTransform,
-                                           0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
+            mPublisher->publishMotionEvent(0, InputEvent::nextId(), 0, 0, ui::ADISPLAY_ID_DEFAULT,
+                                           INVALID_HMAC, 0, 0, 0, 0, 0, 0,
+                                           MotionClassification::NONE, identityTransform, 0, 0,
+                                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                            AMOTION_EVENT_INVALID_CURSOR_POSITION, identityTransform,
                                            0, 0, pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status) << "publisher publishMotionEvent should return BAD_VALUE";
@@ -755,9 +755,10 @@
 
     ui::Transform identityTransform;
     status =
-            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, 0, INVALID_HMAC, 0, 0, 0,
-                                           0, 0, 0, MotionClassification::NONE, identityTransform,
-                                           0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
+            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, ui::ADISPLAY_ID_DEFAULT,
+                                           INVALID_HMAC, 0, 0, 0, 0, 0, 0,
+                                           MotionClassification::NONE, identityTransform, 0, 0,
+                                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                            AMOTION_EVENT_INVALID_CURSOR_POSITION, identityTransform,
                                            0, 0, pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status) << "publisher publishMotionEvent should return BAD_VALUE";
@@ -776,9 +777,10 @@
 
     ui::Transform identityTransform;
     status =
-            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, 0, INVALID_HMAC, 0, 0, 0,
-                                           0, 0, 0, MotionClassification::NONE, identityTransform,
-                                           0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
+            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, ui::ADISPLAY_ID_DEFAULT,
+                                           INVALID_HMAC, 0, 0, 0, 0, 0, 0,
+                                           MotionClassification::NONE, identityTransform, 0, 0,
+                                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                            AMOTION_EVENT_INVALID_CURSOR_POSITION, identityTransform,
                                            0, 0, pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status) << "publisher publishMotionEvent should return BAD_VALUE";
diff --git a/libs/input/tests/InputPublisherAndConsumer_test.cpp b/libs/input/tests/InputPublisherAndConsumer_test.cpp
index 332831f..d0dbe2a 100644
--- a/libs/input/tests/InputPublisherAndConsumer_test.cpp
+++ b/libs/input/tests/InputPublisherAndConsumer_test.cpp
@@ -16,7 +16,6 @@
 
 #include <attestation/HmacKeyManager.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/InputConsumer.h>
 #include <input/InputTransport.h>
 
@@ -49,7 +48,7 @@
     const int32_t eventId;
     const int32_t deviceId = 1;
     const uint32_t source = AINPUT_SOURCE_TOUCHSCREEN;
-    const int32_t displayId = ADISPLAY_ID_DEFAULT;
+    const ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_DEFAULT;
     const int32_t actionButton = 0;
     const int32_t edgeFlags = AMOTION_EVENT_EDGE_FLAG_TOP;
     const int32_t metaState = AMETA_ALT_LEFT_ON | AMETA_ALT_ON;
@@ -263,7 +262,7 @@
     int32_t eventId = InputEvent::nextId();
     constexpr int32_t deviceId = 1;
     constexpr uint32_t source = AINPUT_SOURCE_KEYBOARD;
-    constexpr int32_t displayId = ADISPLAY_ID_DEFAULT;
+    constexpr ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_DEFAULT;
     constexpr std::array<uint8_t, 32> hmac = {31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21,
                                               20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10,
                                               9,  8,  7,  6,  5,  4,  3,  2,  1,  0};
@@ -623,13 +622,13 @@
 
     ui::Transform identityTransform;
     status =
-            mPublisher->publishMotionEvent(0, InputEvent::nextId(), 0, 0, 0, INVALID_HMAC, 0, 0, 0,
-                                           0, 0, 0, MotionClassification::NONE, identityTransform,
-                                           0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
+            mPublisher->publishMotionEvent(0, InputEvent::nextId(), 0, 0, ui::ADISPLAY_ID_DEFAULT,
+                                           INVALID_HMAC, 0, 0, 0, 0, 0, 0,
+                                           MotionClassification::NONE, identityTransform, 0, 0,
+                                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                            AMOTION_EVENT_INVALID_CURSOR_POSITION, identityTransform,
                                            0, 0, pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(BAD_VALUE, status)
-            << "publisher publishMotionEvent should return BAD_VALUE";
+    ASSERT_EQ(BAD_VALUE, status) << "publisher publishMotionEvent should return BAD_VALUE";
 }
 
 TEST_F(InputPublisherAndConsumerTest, PublishMotionEvent_WhenPointerCountLessThan1_ReturnsError) {
@@ -640,17 +639,17 @@
 
     ui::Transform identityTransform;
     status =
-            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, 0, INVALID_HMAC, 0, 0, 0,
-                                           0, 0, 0, MotionClassification::NONE, identityTransform,
-                                           0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
+            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, ui::ADISPLAY_ID_DEFAULT,
+                                           INVALID_HMAC, 0, 0, 0, 0, 0, 0,
+                                           MotionClassification::NONE, identityTransform, 0, 0,
+                                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                            AMOTION_EVENT_INVALID_CURSOR_POSITION, identityTransform,
                                            0, 0, pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(BAD_VALUE, status)
-            << "publisher publishMotionEvent should return BAD_VALUE";
+    ASSERT_EQ(BAD_VALUE, status) << "publisher publishMotionEvent should return BAD_VALUE";
 }
 
 TEST_F(InputPublisherAndConsumerTest,
-        PublishMotionEvent_WhenPointerCountGreaterThanMax_ReturnsError) {
+       PublishMotionEvent_WhenPointerCountGreaterThanMax_ReturnsError) {
     status_t status;
     const size_t pointerCount = MAX_POINTERS + 1;
     PointerProperties pointerProperties[pointerCount];
@@ -662,13 +661,13 @@
 
     ui::Transform identityTransform;
     status =
-            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, 0, INVALID_HMAC, 0, 0, 0,
-                                           0, 0, 0, MotionClassification::NONE, identityTransform,
-                                           0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
+            mPublisher->publishMotionEvent(1, InputEvent::nextId(), 0, 0, ui::ADISPLAY_ID_DEFAULT,
+                                           INVALID_HMAC, 0, 0, 0, 0, 0, 0,
+                                           MotionClassification::NONE, identityTransform, 0, 0,
+                                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                            AMOTION_EVENT_INVALID_CURSOR_POSITION, identityTransform,
                                            0, 0, pointerCount, pointerProperties, pointerCoords);
-    ASSERT_EQ(BAD_VALUE, status)
-            << "publisher publishMotionEvent should return BAD_VALUE";
+    ASSERT_EQ(BAD_VALUE, status) << "publisher publishMotionEvent should return BAD_VALUE";
 }
 
 TEST_F(InputPublisherAndConsumerTest, PublishMultipleEvents_EndToEnd) {
diff --git a/libs/input/tests/MotionPredictor_test.cpp b/libs/input/tests/MotionPredictor_test.cpp
index b8f1caa..1c9f0c7 100644
--- a/libs/input/tests/MotionPredictor_test.cpp
+++ b/libs/input/tests/MotionPredictor_test.cpp
@@ -22,7 +22,6 @@
 #include <flag_macros.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/Input.h>
 #include <input/MotionPredictor.h>
 
@@ -59,8 +58,8 @@
     }
 
     ui::Transform identityTransform;
-    event.initialize(InputEvent::nextId(), deviceId, AINPUT_SOURCE_STYLUS, ADISPLAY_ID_DEFAULT, {0},
-                     action, /*actionButton=*/0, /*flags=*/0, AMOTION_EVENT_EDGE_FLAG_NONE,
+    event.initialize(InputEvent::nextId(), deviceId, AINPUT_SOURCE_STYLUS, ui::ADISPLAY_ID_DEFAULT,
+                     {0}, action, /*actionButton=*/0, /*flags=*/0, AMOTION_EVENT_EDGE_FLAG_NONE,
                      AMETA_NONE, /*buttonState=*/0, MotionClassification::NONE, identityTransform,
                      /*xPrecision=*/0.1,
                      /*yPrecision=*/0.2, /*xCursorPosition=*/280, /*yCursorPosition=*/540,
diff --git a/libs/input/tests/TouchResampling_test.cpp b/libs/input/tests/TouchResampling_test.cpp
index 6e23d4e..1694cad 100644
--- a/libs/input/tests/TouchResampling_test.cpp
+++ b/libs/input/tests/TouchResampling_test.cpp
@@ -84,7 +84,8 @@
         ADD_FAILURE() << "Downtime should be equal to 0 (hardcoded for convenience)";
     }
     return mPublisher->publishMotionEvent(mSeq++, InputEvent::nextId(), /*deviceId=*/1,
-                                          AINPUT_SOURCE_TOUCHSCREEN, /*displayId=*/0, INVALID_HMAC,
+                                          AINPUT_SOURCE_TOUCHSCREEN,
+                                          /*displayId=*/ui::ADISPLAY_ID_DEFAULT, INVALID_HMAC,
                                           action, /*actionButton=*/0, /*flags=*/0, /*edgeFlags=*/0,
                                           AMETA_NONE, /*buttonState=*/0, MotionClassification::NONE,
                                           identityTransform, /*xPrecision=*/0, /*yPrecision=*/0,
diff --git a/libs/input/tests/VelocityTracker_test.cpp b/libs/input/tests/VelocityTracker_test.cpp
index f9ca280..b4c4e12 100644
--- a/libs/input/tests/VelocityTracker_test.cpp
+++ b/libs/input/tests/VelocityTracker_test.cpp
@@ -24,7 +24,6 @@
 #include <android-base/stringprintf.h>
 #include <attestation/HmacKeyManager.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/VelocityTracker.h>
 
 using std::literals::chrono_literals::operator""ms;
@@ -34,7 +33,7 @@
 
 namespace android {
 
-constexpr int32_t DISPLAY_ID = ADISPLAY_ID_DEFAULT; // default display id
+constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT; // default display id
 
 constexpr int32_t DEFAULT_POINTER_ID = 0; // pointer ID used for manually defined tests
 
@@ -156,7 +155,7 @@
         MotionEvent event;
         ui::Transform identityTransform;
         event.initialize(InputEvent::nextId(), /*deviceId=*/5, AINPUT_SOURCE_ROTARY_ENCODER,
-                         ADISPLAY_ID_NONE, INVALID_HMAC, AMOTION_EVENT_ACTION_SCROLL,
+                         ui::ADISPLAY_ID_NONE, INVALID_HMAC, AMOTION_EVENT_ACTION_SCROLL,
                          /*actionButton=*/0, /*flags=*/0, AMOTION_EVENT_EDGE_FLAG_NONE, AMETA_NONE,
                          /*buttonState=*/0, MotionClassification::NONE, identityTransform,
                          /*xPrecision=*/0, /*yPrecision=*/0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
diff --git a/libs/input/tests/VerifiedInputEvent_test.cpp b/libs/input/tests/VerifiedInputEvent_test.cpp
index 277d74d..40cfaae 100644
--- a/libs/input/tests/VerifiedInputEvent_test.cpp
+++ b/libs/input/tests/VerifiedInputEvent_test.cpp
@@ -16,7 +16,6 @@
 
 #include <attestation/HmacKeyManager.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/Input.h>
 
 namespace android {
@@ -24,7 +23,7 @@
 static KeyEvent getKeyEventWithFlags(int32_t flags) {
     KeyEvent event;
     event.initialize(InputEvent::nextId(), /*deviceId=*/2, AINPUT_SOURCE_GAMEPAD,
-                     ADISPLAY_ID_DEFAULT, INVALID_HMAC, AKEY_EVENT_ACTION_DOWN, flags,
+                     ui::ADISPLAY_ID_DEFAULT, INVALID_HMAC, AKEY_EVENT_ACTION_DOWN, flags,
                      AKEYCODE_BUTTON_X, /*scanCode=*/121, AMETA_ALT_ON, /*repeatCount=*/1,
                      /*downTime=*/1000, /*eventTime=*/2000);
     return event;
@@ -44,10 +43,11 @@
     ui::Transform transform;
     transform.set({2, 0, 4, 0, 3, 5, 0, 0, 1});
     ui::Transform identity;
-    event.initialize(InputEvent::nextId(), /*deviceId=*/0, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_DEFAULT,
-                     INVALID_HMAC, AMOTION_EVENT_ACTION_DOWN, /*actionButton=*/0, flags,
-                     AMOTION_EVENT_EDGE_FLAG_NONE, AMETA_NONE, /*buttonState=*/0,
-                     MotionClassification::NONE, transform, /*xPrecision=*/0.1, /*yPrecision=*/0.2,
+    event.initialize(InputEvent::nextId(), /*deviceId=*/0, AINPUT_SOURCE_MOUSE,
+                     ui::ADISPLAY_ID_DEFAULT, INVALID_HMAC, AMOTION_EVENT_ACTION_DOWN,
+                     /*actionButton=*/0, flags, AMOTION_EVENT_EDGE_FLAG_NONE, AMETA_NONE,
+                     /*buttonState=*/0, MotionClassification::NONE, transform, /*xPrecision=*/0.1,
+                     /*yPrecision=*/0.2,
                      /*xCursorPosition=*/280, /*yCursorPosition=*/540, identity, /*downTime=*/100,
                      /*eventTime=*/200, pointerCount, pointerProperties, pointerCoords);
     return event;
diff --git a/libs/ui/include/ui/LogicalDisplayId.h b/libs/ui/include/ui/LogicalDisplayId.h
new file mode 100644
index 0000000..3e504e7
--- /dev/null
+++ b/libs/ui/include/ui/LogicalDisplayId.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2024 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.
+ */
+
+#pragma once
+
+#include <ftl/mixins.h>
+#include <sys/types.h>
+#include <string>
+
+#include <ostream>
+
+namespace android::ui {
+
+// Type-safe wrapper for a logical display id.
+struct LogicalDisplayId : ftl::Constructible<LogicalDisplayId, int32_t>,
+                          ftl::Equatable<LogicalDisplayId>,
+                          ftl::Orderable<LogicalDisplayId> {
+    using Constructible::Constructible;
+
+    constexpr auto val() const { return ftl::to_underlying(*this); }
+
+    constexpr bool isValid() const { return val() >= 0; }
+
+    std::string toString() const { return std::to_string(val()); }
+};
+
+constexpr LogicalDisplayId ADISPLAY_ID_NONE{-1};
+constexpr LogicalDisplayId ADISPLAY_ID_DEFAULT{0};
+
+inline std::ostream& operator<<(std::ostream& stream, LogicalDisplayId displayId) {
+    return stream << displayId.val();
+}
+
+} // namespace android::ui
+
+namespace std {
+template <>
+struct hash<android::ui::LogicalDisplayId> {
+    size_t operator()(const android::ui::LogicalDisplayId& displayId) const {
+        return hash<int32_t>()(displayId.val());
+    }
+};
+} // namespace std
\ No newline at end of file
diff --git a/services/inputflinger/InputCommonConverter.cpp b/services/inputflinger/InputCommonConverter.cpp
index 417c1f3..e376734 100644
--- a/services/inputflinger/InputCommonConverter.cpp
+++ b/services/inputflinger/InputCommonConverter.cpp
@@ -314,7 +314,7 @@
     common::MotionEvent event;
     event.deviceId = args.deviceId;
     event.source = getSource(args.source);
-    event.displayId = args.displayId;
+    event.displayId = args.displayId.val();
     event.downTime = args.downTime;
     event.eventTime = args.eventTime;
     event.deviceTimestamp = 0;
diff --git a/services/inputflinger/InputFilter.cpp b/services/inputflinger/InputFilter.cpp
index 1ada5e5..8e73ce5 100644
--- a/services/inputflinger/InputFilter.cpp
+++ b/services/inputflinger/InputFilter.cpp
@@ -32,7 +32,7 @@
     event.eventTime = args.eventTime;
     event.deviceId = args.deviceId;
     event.source = static_cast<Source>(args.source);
-    event.displayId = args.displayId;
+    event.displayId = args.displayId.val();
     event.policyFlags = args.policyFlags;
     event.action = static_cast<KeyEventAction>(args.action);
     event.flags = args.flags;
diff --git a/services/inputflinger/InputFilterCallbacks.cpp b/services/inputflinger/InputFilterCallbacks.cpp
index a9bdbec..5fbdc84 100644
--- a/services/inputflinger/InputFilterCallbacks.cpp
+++ b/services/inputflinger/InputFilterCallbacks.cpp
@@ -30,9 +30,9 @@
 
 NotifyKeyArgs keyEventToNotifyKeyArgs(const AidlKeyEvent& event) {
     return NotifyKeyArgs(event.id, event.eventTime, event.readTime, event.deviceId,
-                         static_cast<uint32_t>(event.source), event.displayId, event.policyFlags,
-                         static_cast<int32_t>(event.action), event.flags, event.keyCode,
-                         event.scanCode, event.metaState, event.downTime);
+                         static_cast<uint32_t>(event.source), ui::LogicalDisplayId{event.displayId},
+                         event.policyFlags, static_cast<int32_t>(event.action), event.flags,
+                         event.keyCode, event.scanCode, event.metaState, event.downTime);
 }
 
 namespace {
diff --git a/services/inputflinger/InputReaderBase.cpp b/services/inputflinger/InputReaderBase.cpp
index 4ec5b89..29b487f 100644
--- a/services/inputflinger/InputReaderBase.cpp
+++ b/services/inputflinger/InputReaderBase.cpp
@@ -68,7 +68,7 @@
         if (currentViewport.type == type) {
             if (!result ||
                 (type == ViewportType::INTERNAL &&
-                 currentViewport.displayId == ADISPLAY_ID_DEFAULT)) {
+                 currentViewport.displayId == ui::ADISPLAY_ID_DEFAULT)) {
                 result = std::make_optional(currentViewport);
             }
             count++;
@@ -93,7 +93,7 @@
 }
 
 std::optional<DisplayViewport> InputReaderConfiguration::getDisplayViewportById(
-        int32_t displayId) const {
+        ui::LogicalDisplayId displayId) const {
     for (const DisplayViewport& currentViewport : mDisplays) {
         if (currentViewport.displayId == displayId) {
             return std::make_optional(currentViewport);
diff --git a/services/inputflinger/NotifyArgs.cpp b/services/inputflinger/NotifyArgs.cpp
index de836e9..19a4f26 100644
--- a/services/inputflinger/NotifyArgs.cpp
+++ b/services/inputflinger/NotifyArgs.cpp
@@ -43,7 +43,7 @@
 // --- NotifyKeyArgs ---
 
 NotifyKeyArgs::NotifyKeyArgs(int32_t id, nsecs_t eventTime, nsecs_t readTime, int32_t deviceId,
-                             uint32_t source, int32_t displayId, uint32_t policyFlags,
+                             uint32_t source, ui::LogicalDisplayId displayId, uint32_t policyFlags,
                              int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
                              int32_t metaState, nsecs_t downTime)
       : id(id),
@@ -64,7 +64,7 @@
 
 NotifyMotionArgs::NotifyMotionArgs(
         int32_t id, nsecs_t eventTime, nsecs_t readTime, int32_t deviceId, uint32_t source,
-        int32_t displayId, uint32_t policyFlags, int32_t action, int32_t actionButton,
+        ui::LogicalDisplayId displayId, uint32_t policyFlags, int32_t action, int32_t actionButton,
         int32_t flags, int32_t metaState, int32_t buttonState, MotionClassification classification,
         int32_t edgeFlags, uint32_t pointerCount, const PointerProperties* pointerProperties,
         const PointerCoords* pointerCoords, float xPrecision, float yPrecision,
diff --git a/services/inputflinger/PointerChoreographer.cpp b/services/inputflinger/PointerChoreographer.cpp
index a3d0c2b..d6c6f93 100644
--- a/services/inputflinger/PointerChoreographer.cpp
+++ b/services/inputflinger/PointerChoreographer.cpp
@@ -67,8 +67,9 @@
              !isFromSource(sources, AINPUT_SOURCE_STYLUS));
 }
 
-inline void notifyPointerDisplayChange(std::optional<std::tuple<int32_t, FloatPoint>> change,
-                                       PointerChoreographerPolicyInterface& policy) {
+inline void notifyPointerDisplayChange(
+        std::optional<std::tuple<ui::LogicalDisplayId, FloatPoint>> change,
+        PointerChoreographerPolicyInterface& policy) {
     if (!change) {
         return;
     }
@@ -100,8 +101,8 @@
         }),
         mNextListener(listener),
         mPolicy(policy),
-        mDefaultMouseDisplayId(ADISPLAY_ID_DEFAULT),
-        mNotifiedPointerDisplayId(ADISPLAY_ID_NONE),
+        mDefaultMouseDisplayId(ui::ADISPLAY_ID_DEFAULT),
+        mNotifiedPointerDisplayId(ui::ADISPLAY_ID_NONE),
         mShowTouchesEnabled(false),
         mStylusPointerIconEnabled(false) {}
 
@@ -235,7 +236,7 @@
 }
 
 void PointerChoreographer::processDrawingTabletEventLocked(const android::NotifyMotionArgs& args) {
-    if (args.displayId == ADISPLAY_ID_NONE) {
+    if (args.displayId == ui::ADISPLAY_ID_NONE) {
         return;
     }
 
@@ -272,7 +273,7 @@
  * For touch events, we do not need to populate the cursor position.
  */
 void PointerChoreographer::processTouchscreenAndStylusEventLocked(const NotifyMotionArgs& args) {
-    if (args.displayId == ADISPLAY_ID_NONE) {
+    if (!args.displayId.isValid()) {
         return;
     }
 
@@ -315,7 +316,7 @@
 }
 
 void PointerChoreographer::processStylusHoverEventLocked(const NotifyMotionArgs& args) {
-    if (args.displayId == ADISPLAY_ID_NONE) {
+    if (!args.displayId.isValid()) {
         return;
     }
 
@@ -423,7 +424,7 @@
     dump += INDENT "MousePointerControllers:\n";
     for (const auto& [displayId, mousePointerController] : mMousePointersByDisplay) {
         std::string pointerControllerDump = addLinePrefix(mousePointerController->dump(), INDENT);
-        dump += INDENT + std::to_string(displayId) + " : " + pointerControllerDump;
+        dump += INDENT + displayId.toString() + " : " + pointerControllerDump;
     }
     dump += INDENT "TouchPointerControllers:\n";
     for (const auto& [deviceId, touchPointerController] : mTouchPointersByDevice) {
@@ -443,7 +444,8 @@
     dump += "\n";
 }
 
-const DisplayViewport* PointerChoreographer::findViewportByIdLocked(int32_t displayId) const {
+const DisplayViewport* PointerChoreographer::findViewportByIdLocked(
+        ui::LogicalDisplayId displayId) const {
     for (auto& viewport : mViewports) {
         if (viewport.displayId == displayId) {
             return &viewport;
@@ -452,13 +454,14 @@
     return nullptr;
 }
 
-int32_t PointerChoreographer::getTargetMouseDisplayLocked(int32_t associatedDisplayId) const {
-    return associatedDisplayId == ADISPLAY_ID_NONE ? mDefaultMouseDisplayId : associatedDisplayId;
+ui::LogicalDisplayId PointerChoreographer::getTargetMouseDisplayLocked(
+        ui::LogicalDisplayId associatedDisplayId) const {
+    return associatedDisplayId.isValid() ? associatedDisplayId : mDefaultMouseDisplayId;
 }
 
-std::pair<int32_t, PointerControllerInterface&> PointerChoreographer::ensureMouseControllerLocked(
-        int32_t associatedDisplayId) {
-    const int32_t displayId = getTargetMouseDisplayLocked(associatedDisplayId);
+std::pair<ui::LogicalDisplayId, PointerControllerInterface&>
+PointerChoreographer::ensureMouseControllerLocked(ui::LogicalDisplayId associatedDisplayId) {
+    const ui::LogicalDisplayId displayId = getTargetMouseDisplayLocked(associatedDisplayId);
 
     auto it = mMousePointersByDisplay.find(displayId);
     if (it == mMousePointersByDisplay.end()) {
@@ -476,12 +479,12 @@
     return it != mInputDeviceInfos.end() ? &(*it) : nullptr;
 }
 
-bool PointerChoreographer::canUnfadeOnDisplay(int32_t displayId) {
+bool PointerChoreographer::canUnfadeOnDisplay(ui::LogicalDisplayId displayId) {
     return mDisplaysWithPointersHidden.find(displayId) == mDisplaysWithPointersHidden.end();
 }
 
 PointerChoreographer::PointerDisplayChange PointerChoreographer::updatePointerControllersLocked() {
-    std::set<int32_t /*displayId*/> mouseDisplaysToKeep;
+    std::set<ui::LogicalDisplayId /*displayId*/> mouseDisplaysToKeep;
     std::set<DeviceId> touchDevicesToKeep;
     std::set<DeviceId> stylusDevicesToKeep;
     std::set<DeviceId> drawingTabletDevicesToKeep;
@@ -498,7 +501,8 @@
         const bool isKnownMouse = mMouseDevices.count(info.getId()) != 0;
 
         if (isMouseOrTouchpad(sources) || isKnownMouse) {
-            const int32_t displayId = getTargetMouseDisplayLocked(info.getAssociatedDisplayId());
+            const ui::LogicalDisplayId displayId =
+                    getTargetMouseDisplayLocked(info.getAssociatedDisplayId());
             mouseDisplaysToKeep.insert(displayId);
             // For mice, show the cursor immediately when the device is first connected or
             // when it moves to a new display.
@@ -513,15 +517,15 @@
             }
         }
         if (isFromSource(sources, AINPUT_SOURCE_TOUCHSCREEN) && mShowTouchesEnabled &&
-            info.getAssociatedDisplayId() != ADISPLAY_ID_NONE) {
+            info.getAssociatedDisplayId().isValid()) {
             touchDevicesToKeep.insert(info.getId());
         }
         if (isFromSource(sources, AINPUT_SOURCE_STYLUS) && mStylusPointerIconEnabled &&
-            info.getAssociatedDisplayId() != ADISPLAY_ID_NONE) {
+            info.getAssociatedDisplayId().isValid()) {
             stylusDevicesToKeep.insert(info.getId());
         }
         if (isFromSource(sources, AINPUT_SOURCE_STYLUS | AINPUT_SOURCE_MOUSE) &&
-            info.getAssociatedDisplayId() != ADISPLAY_ID_NONE) {
+            info.getAssociatedDisplayId().isValid()) {
             drawingTabletDevicesToKeep.insert(info.getId());
         }
     }
@@ -553,7 +557,7 @@
 
 PointerChoreographer::PointerDisplayChange
 PointerChoreographer::calculatePointerDisplayChangeToNotify() {
-    int32_t displayIdToNotify = ADISPLAY_ID_NONE;
+    ui::LogicalDisplayId displayIdToNotify = ui::ADISPLAY_ID_NONE;
     FloatPoint cursorPosition = {0, 0};
     if (const auto it = mMousePointersByDisplay.find(mDefaultMouseDisplayId);
         it != mMousePointersByDisplay.end()) {
@@ -571,7 +575,7 @@
     return {{displayIdToNotify, cursorPosition}};
 }
 
-void PointerChoreographer::setDefaultMouseDisplayId(int32_t displayId) {
+void PointerChoreographer::setDefaultMouseDisplayId(ui::LogicalDisplayId displayId) {
     PointerDisplayChange pointerDisplayChange;
 
     { // acquire lock
@@ -590,7 +594,7 @@
     { // acquire lock
         std::scoped_lock _l(mLock);
         for (const auto& viewport : viewports) {
-            const int32_t displayId = viewport.displayId;
+            const ui::LogicalDisplayId displayId = viewport.displayId;
             if (const auto it = mMousePointersByDisplay.find(displayId);
                 it != mMousePointersByDisplay.end()) {
                 it->second->setDisplayViewport(viewport);
@@ -616,18 +620,18 @@
 }
 
 std::optional<DisplayViewport> PointerChoreographer::getViewportForPointerDevice(
-        int32_t associatedDisplayId) {
+        ui::LogicalDisplayId associatedDisplayId) {
     std::scoped_lock _l(mLock);
-    const int32_t resolvedDisplayId = getTargetMouseDisplayLocked(associatedDisplayId);
+    const ui::LogicalDisplayId resolvedDisplayId = getTargetMouseDisplayLocked(associatedDisplayId);
     if (const auto viewport = findViewportByIdLocked(resolvedDisplayId); viewport) {
         return *viewport;
     }
     return std::nullopt;
 }
 
-FloatPoint PointerChoreographer::getMouseCursorPosition(int32_t displayId) {
+FloatPoint PointerChoreographer::getMouseCursorPosition(ui::LogicalDisplayId displayId) {
     std::scoped_lock _l(mLock);
-    const int32_t resolvedDisplayId = getTargetMouseDisplayLocked(displayId);
+    const ui::LogicalDisplayId resolvedDisplayId = getTargetMouseDisplayLocked(displayId);
     if (auto it = mMousePointersByDisplay.find(resolvedDisplayId);
         it != mMousePointersByDisplay.end()) {
         return it->second->getPosition();
@@ -666,8 +670,8 @@
 }
 
 bool PointerChoreographer::setPointerIcon(
-        std::variant<std::unique_ptr<SpriteIcon>, PointerIconStyle> icon, int32_t displayId,
-        DeviceId deviceId) {
+        std::variant<std::unique_ptr<SpriteIcon>, PointerIconStyle> icon,
+        ui::LogicalDisplayId displayId, DeviceId deviceId) {
     std::scoped_lock _l(mLock);
     if (deviceId < 0) {
         LOG(WARNING) << "Invalid device id " << deviceId << ". Cannot set pointer icon.";
@@ -715,8 +719,8 @@
         const std::vector<android::gui::WindowInfo>& windowInfos) {
     // Mark all spot controllers secure on displays containing secure windows and
     // remove secure flag from others if required
-    std::unordered_set<int32_t> privacySensitiveDisplays;
-    std::unordered_set<int32_t> allDisplayIds;
+    std::unordered_set<ui::LogicalDisplayId> privacySensitiveDisplays;
+    std::unordered_set<ui::LogicalDisplayId> allDisplayIds;
     for (const auto& windowInfo : windowInfos) {
         allDisplayIds.insert(windowInfo.displayId);
         if (!windowInfo.inputConfig.test(gui::WindowInfo::InputConfig::NOT_VISIBLE) &&
@@ -727,7 +731,7 @@
 
     for (auto& it : mTouchPointersByDevice) {
         auto& pc = it.second;
-        for (int32_t displayId : allDisplayIds) {
+        for (ui::LogicalDisplayId displayId : allDisplayIds) {
             pc->setSkipScreenshot(displayId,
                                   privacySensitiveDisplays.find(displayId) !=
                                           privacySensitiveDisplays.end());
@@ -736,7 +740,7 @@
     // TODO (b/325252005): update skip screenshot flag for other types of pointer controllers
 }
 
-void PointerChoreographer::setPointerIconVisibility(int32_t displayId, bool visible) {
+void PointerChoreographer::setPointerIconVisibility(ui::LogicalDisplayId displayId, bool visible) {
     std::scoped_lock lock(mLock);
     if (visible) {
         mDisplaysWithPointersHidden.erase(displayId);
@@ -759,7 +763,7 @@
 }
 
 PointerChoreographer::ControllerConstructor PointerChoreographer::getMouseControllerConstructor(
-        int32_t displayId) {
+        ui::LogicalDisplayId displayId) {
     std::function<std::shared_ptr<PointerControllerInterface>()> ctor =
             [this, displayId]() REQUIRES(mLock) {
                 auto pc = mPolicy.createPointerController(
@@ -773,7 +777,7 @@
 }
 
 PointerChoreographer::ControllerConstructor PointerChoreographer::getStylusControllerConstructor(
-        int32_t displayId) {
+        ui::LogicalDisplayId displayId) {
     std::function<std::shared_ptr<PointerControllerInterface>()> ctor =
             [this, displayId]() REQUIRES(mLock) {
                 auto pc = mPolicy.createPointerController(
diff --git a/services/inputflinger/PointerChoreographer.h b/services/inputflinger/PointerChoreographer.h
index b29d9cd..fda5f52 100644
--- a/services/inputflinger/PointerChoreographer.h
+++ b/services/inputflinger/PointerChoreographer.h
@@ -54,11 +54,11 @@
      * Set the display that pointers, like the mouse cursor and drawing tablets,
      * should be drawn on.
      */
-    virtual void setDefaultMouseDisplayId(int32_t displayId) = 0;
+    virtual void setDefaultMouseDisplayId(ui::LogicalDisplayId displayId) = 0;
     virtual void setDisplayViewports(const std::vector<DisplayViewport>& viewports) = 0;
     virtual std::optional<DisplayViewport> getViewportForPointerDevice(
-            int32_t associatedDisplayId = ADISPLAY_ID_NONE) = 0;
-    virtual FloatPoint getMouseCursorPosition(int32_t displayId) = 0;
+            ui::LogicalDisplayId associatedDisplayId = ui::ADISPLAY_ID_NONE) = 0;
+    virtual FloatPoint getMouseCursorPosition(ui::LogicalDisplayId displayId) = 0;
     virtual void setShowTouchesEnabled(bool enabled) = 0;
     virtual void setStylusPointerIconEnabled(bool enabled) = 0;
     /**
@@ -67,12 +67,12 @@
      * Returns true if the icon was changed successfully, false otherwise.
      */
     virtual bool setPointerIcon(std::variant<std::unique_ptr<SpriteIcon>, PointerIconStyle> icon,
-                                int32_t displayId, DeviceId deviceId) = 0;
+                                ui::LogicalDisplayId displayId, DeviceId deviceId) = 0;
     /**
      * Set whether pointer icons for mice, touchpads, and styluses should be visible on the
      * given display.
      */
-    virtual void setPointerIconVisibility(int32_t displayId, bool visible) = 0;
+    virtual void setPointerIconVisibility(ui::LogicalDisplayId displayId, bool visible) = 0;
 
     /**
      * This method may be called on any thread (usually by the input manager on a binder thread).
@@ -86,16 +86,16 @@
                                   PointerChoreographerPolicyInterface&);
     ~PointerChoreographer() override;
 
-    void setDefaultMouseDisplayId(int32_t displayId) override;
+    void setDefaultMouseDisplayId(ui::LogicalDisplayId displayId) override;
     void setDisplayViewports(const std::vector<DisplayViewport>& viewports) override;
     std::optional<DisplayViewport> getViewportForPointerDevice(
-            int32_t associatedDisplayId) override;
-    FloatPoint getMouseCursorPosition(int32_t displayId) override;
+            ui::LogicalDisplayId associatedDisplayId) override;
+    FloatPoint getMouseCursorPosition(ui::LogicalDisplayId displayId) override;
     void setShowTouchesEnabled(bool enabled) override;
     void setStylusPointerIconEnabled(bool enabled) override;
     bool setPointerIcon(std::variant<std::unique_ptr<SpriteIcon>, PointerIconStyle> icon,
-                        int32_t displayId, DeviceId deviceId) override;
-    void setPointerIconVisibility(int32_t displayId, bool visible) override;
+                        ui::LogicalDisplayId displayId, DeviceId deviceId) override;
+    void setPointerIconVisibility(ui::LogicalDisplayId displayId, bool visible) override;
 
     void notifyInputDevicesChanged(const NotifyInputDevicesChangedArgs& args) override;
     void notifyConfigurationChanged(const NotifyConfigurationChangedArgs& args) override;
@@ -113,16 +113,18 @@
     void dump(std::string& dump) override;
 
 private:
-    using PointerDisplayChange =
-            std::optional<std::tuple<int32_t /*displayId*/, FloatPoint /*cursorPosition*/>>;
+    using PointerDisplayChange = std::optional<
+            std::tuple<ui::LogicalDisplayId /*displayId*/, FloatPoint /*cursorPosition*/>>;
     [[nodiscard]] PointerDisplayChange updatePointerControllersLocked() REQUIRES(mLock);
     [[nodiscard]] PointerDisplayChange calculatePointerDisplayChangeToNotify() REQUIRES(mLock);
-    const DisplayViewport* findViewportByIdLocked(int32_t displayId) const REQUIRES(mLock);
-    int32_t getTargetMouseDisplayLocked(int32_t associatedDisplayId) const REQUIRES(mLock);
-    std::pair<int32_t /*displayId*/, PointerControllerInterface&> ensureMouseControllerLocked(
-            int32_t associatedDisplayId) REQUIRES(mLock);
+    const DisplayViewport* findViewportByIdLocked(ui::LogicalDisplayId displayId) const
+            REQUIRES(mLock);
+    ui::LogicalDisplayId getTargetMouseDisplayLocked(ui::LogicalDisplayId associatedDisplayId) const
+            REQUIRES(mLock);
+    std::pair<ui::LogicalDisplayId /*displayId*/, PointerControllerInterface&>
+    ensureMouseControllerLocked(ui::LogicalDisplayId associatedDisplayId) REQUIRES(mLock);
     InputDeviceInfo* findInputDeviceLocked(DeviceId deviceId) REQUIRES(mLock);
-    bool canUnfadeOnDisplay(int32_t displayId) REQUIRES(mLock);
+    bool canUnfadeOnDisplay(ui::LogicalDisplayId displayId) REQUIRES(mLock);
 
     NotifyMotionArgs processMotion(const NotifyMotionArgs& args);
     NotifyMotionArgs processMouseEventLocked(const NotifyMotionArgs& args) REQUIRES(mLock);
@@ -151,16 +153,18 @@
     using ControllerConstructor =
             ConstructorDelegate<std::function<std::shared_ptr<PointerControllerInterface>()>>;
     ControllerConstructor mTouchControllerConstructor GUARDED_BY(mLock);
-    ControllerConstructor getMouseControllerConstructor(int32_t displayId) REQUIRES(mLock);
-    ControllerConstructor getStylusControllerConstructor(int32_t displayId) REQUIRES(mLock);
+    ControllerConstructor getMouseControllerConstructor(ui::LogicalDisplayId displayId)
+            REQUIRES(mLock);
+    ControllerConstructor getStylusControllerConstructor(ui::LogicalDisplayId displayId)
+            REQUIRES(mLock);
 
     std::mutex mLock;
 
     InputListenerInterface& mNextListener;
     PointerChoreographerPolicyInterface& mPolicy;
 
-    std::map<int32_t, std::shared_ptr<PointerControllerInterface>> mMousePointersByDisplay
-            GUARDED_BY(mLock);
+    std::map<ui::LogicalDisplayId, std::shared_ptr<PointerControllerInterface>>
+            mMousePointersByDisplay GUARDED_BY(mLock);
     std::map<DeviceId, std::shared_ptr<PointerControllerInterface>> mTouchPointersByDevice
             GUARDED_BY(mLock);
     std::map<DeviceId, std::shared_ptr<PointerControllerInterface>> mStylusPointersByDevice
@@ -168,14 +172,14 @@
     std::map<DeviceId, std::shared_ptr<PointerControllerInterface>> mDrawingTabletPointersByDevice
             GUARDED_BY(mLock);
 
-    int32_t mDefaultMouseDisplayId GUARDED_BY(mLock);
-    int32_t mNotifiedPointerDisplayId GUARDED_BY(mLock);
+    ui::LogicalDisplayId mDefaultMouseDisplayId GUARDED_BY(mLock);
+    ui::LogicalDisplayId mNotifiedPointerDisplayId GUARDED_BY(mLock);
     std::vector<InputDeviceInfo> mInputDeviceInfos GUARDED_BY(mLock);
     std::set<DeviceId> mMouseDevices GUARDED_BY(mLock);
     std::vector<DisplayViewport> mViewports GUARDED_BY(mLock);
     bool mShowTouchesEnabled GUARDED_BY(mLock);
     bool mStylusPointerIconEnabled GUARDED_BY(mLock);
-    std::set<int32_t /*displayId*/> mDisplaysWithPointersHidden;
+    std::set<ui::LogicalDisplayId /*displayId*/> mDisplaysWithPointersHidden;
 };
 
 } // namespace android
diff --git a/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp b/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
index 5f95590..66e4a29 100644
--- a/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
+++ b/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
@@ -18,7 +18,6 @@
 
 #include <android/os/IInputConstants.h>
 #include <binder/Binder.h>
-#include <gui/constants.h>
 #include "../dispatcher/InputDispatcher.h"
 #include "../tests/FakeApplicationHandle.h"
 #include "../tests/FakeInputDispatcherPolicy.h"
@@ -38,7 +37,7 @@
 constexpr DeviceId DEVICE_ID = 1;
 
 // An arbitrary display id
-constexpr int32_t DISPLAY_ID = ADISPLAY_ID_DEFAULT;
+constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
 
 static constexpr std::chrono::duration INJECT_EVENT_TIMEOUT = 5s;
 
@@ -63,7 +62,7 @@
     ui::Transform identityTransform;
     MotionEvent event;
     event.initialize(IInputConstants::INVALID_INPUT_EVENT_ID, DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-                     ADISPLAY_ID_DEFAULT, INVALID_HMAC, AMOTION_EVENT_ACTION_DOWN,
+                     ui::ADISPLAY_ID_DEFAULT, INVALID_HMAC, AMOTION_EVENT_ACTION_DOWN,
                      /* actionButton */ 0, /* flags */ 0,
                      /* edgeFlags */ 0, AMETA_NONE, /* buttonState */ 0, MotionClassification::NONE,
                      identityTransform, /* xPrecision */ 0,
@@ -89,7 +88,7 @@
     const nsecs_t currentTime = now();
     // Define a valid motion event.
     NotifyMotionArgs args(IInputConstants::INVALID_INPUT_EVENT_ID, currentTime, currentTime,
-                          DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT,
+                          DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN, ui::ADISPLAY_ID_DEFAULT,
                           POLICY_FLAG_PASS_TO_USER, AMOTION_EVENT_ACTION_DOWN,
                           /* actionButton */ 0, /* flags */ 0, AMETA_NONE, /* buttonState */ 0,
                           MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, 1,
diff --git a/services/inputflinger/dispatcher/CancelationOptions.h b/services/inputflinger/dispatcher/CancelationOptions.h
index 9c73f03..4a0889f 100644
--- a/services/inputflinger/dispatcher/CancelationOptions.h
+++ b/services/inputflinger/dispatcher/CancelationOptions.h
@@ -48,7 +48,7 @@
     std::optional<int32_t> deviceId = std::nullopt;
 
     // The specific display id of events to cancel, or nullopt to cancel events on any display.
-    std::optional<int32_t> displayId = std::nullopt;
+    std::optional<ui::LogicalDisplayId> displayId = std::nullopt;
 
     // The specific pointers to cancel, or nullopt to cancel all pointer events
     std::optional<std::bitset<MAX_POINTER_ID + 1>> pointerIds = std::nullopt;
diff --git a/services/inputflinger/dispatcher/Entry.cpp b/services/inputflinger/dispatcher/Entry.cpp
index c8bc87f..ad9cec1 100644
--- a/services/inputflinger/dispatcher/Entry.cpp
+++ b/services/inputflinger/dispatcher/Entry.cpp
@@ -132,9 +132,9 @@
 // --- KeyEntry ---
 
 KeyEntry::KeyEntry(int32_t id, std::shared_ptr<InjectionState> injectionState, nsecs_t eventTime,
-                   int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
-                   int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
-                   int32_t metaState, int32_t repeatCount, nsecs_t downTime)
+                   int32_t deviceId, uint32_t source, ui::LogicalDisplayId displayId,
+                   uint32_t policyFlags, int32_t action, int32_t flags, int32_t keyCode,
+                   int32_t scanCode, int32_t metaState, int32_t repeatCount, nsecs_t downTime)
       : EventEntry(id, Type::KEY, eventTime, policyFlags),
         deviceId(deviceId),
         source(source),
@@ -156,13 +156,14 @@
     if (!IS_DEBUGGABLE_BUILD) {
         return "KeyEvent";
     }
-    return StringPrintf("KeyEvent(deviceId=%d, eventTime=%" PRIu64 ", source=%s, displayId=%" PRId32
-                        ", action=%s, "
+    return StringPrintf("KeyEvent(deviceId=%d, eventTime=%" PRIu64 ", source=%s, displayId=%s, "
+                        "action=%s, "
                         "flags=0x%08x, keyCode=%s(%d), scanCode=%d, metaState=0x%08x, "
                         "repeatCount=%d), policyFlags=0x%08x",
-                        deviceId, eventTime, inputEventSourceToString(source).c_str(), displayId,
-                        KeyEvent::actionToString(action), flags, KeyEvent::getLabel(keyCode),
-                        keyCode, scanCode, metaState, repeatCount, policyFlags);
+                        deviceId, eventTime, inputEventSourceToString(source).c_str(),
+                        displayId.toString().c_str(), KeyEvent::actionToString(action), flags,
+                        KeyEvent::getLabel(keyCode), keyCode, scanCode, metaState, repeatCount,
+                        policyFlags);
 }
 
 std::ostream& operator<<(std::ostream& out, const KeyEntry& keyEntry) {
@@ -172,7 +173,8 @@
 
 // --- TouchModeEntry ---
 
-TouchModeEntry::TouchModeEntry(int32_t id, nsecs_t eventTime, bool inTouchMode, int displayId)
+TouchModeEntry::TouchModeEntry(int32_t id, nsecs_t eventTime, bool inTouchMode,
+                               ui::LogicalDisplayId displayId)
       : EventEntry(id, Type::TOUCH_MODE_CHANGED, eventTime, POLICY_FLAG_PASS_TO_USER),
         inTouchMode(inTouchMode),
         displayId(displayId) {}
@@ -184,12 +186,13 @@
 // --- MotionEntry ---
 
 MotionEntry::MotionEntry(int32_t id, std::shared_ptr<InjectionState> injectionState,
-                         nsecs_t eventTime, int32_t deviceId, uint32_t source, int32_t displayId,
-                         uint32_t policyFlags, int32_t action, int32_t actionButton, int32_t flags,
-                         int32_t metaState, int32_t buttonState,
-                         MotionClassification classification, int32_t edgeFlags, float xPrecision,
-                         float yPrecision, float xCursorPosition, float yCursorPosition,
-                         nsecs_t downTime, const std::vector<PointerProperties>& pointerProperties,
+                         nsecs_t eventTime, int32_t deviceId, uint32_t source,
+                         ui::LogicalDisplayId displayId, uint32_t policyFlags, int32_t action,
+                         int32_t actionButton, int32_t flags, int32_t metaState,
+                         int32_t buttonState, MotionClassification classification,
+                         int32_t edgeFlags, float xPrecision, float yPrecision,
+                         float xCursorPosition, float yCursorPosition, nsecs_t downTime,
+                         const std::vector<PointerProperties>& pointerProperties,
                          const std::vector<PointerCoords>& pointerCoords)
       : EventEntry(id, Type::MOTION, eventTime, policyFlags),
         deviceId(deviceId),
@@ -218,15 +221,16 @@
     }
     std::string msg;
     msg += StringPrintf("MotionEvent(deviceId=%d, eventTime=%" PRIu64
-                        ", source=%s, displayId=%" PRId32
-                        ", action=%s, actionButton=0x%08x, flags=0x%08x, metaState=0x%08x, "
+                        ", source=%s, displayId=%s, action=%s, actionButton=0x%08x, flags=0x%08x,"
+                        " metaState=0x%08x, "
                         "buttonState=0x%08x, "
                         "classification=%s, edgeFlags=0x%08x, xPrecision=%.1f, yPrecision=%.1f, "
                         "xCursorPosition=%0.1f, yCursorPosition=%0.1f, pointers=[",
-                        deviceId, eventTime, inputEventSourceToString(source).c_str(), displayId,
-                        MotionEvent::actionToString(action).c_str(), actionButton, flags, metaState,
-                        buttonState, motionClassificationToString(classification), edgeFlags,
-                        xPrecision, yPrecision, xCursorPosition, yCursorPosition);
+                        deviceId, eventTime, inputEventSourceToString(source).c_str(),
+                        displayId.toString().c_str(), MotionEvent::actionToString(action).c_str(),
+                        actionButton, flags, metaState, buttonState,
+                        motionClassificationToString(classification), edgeFlags, xPrecision,
+                        yPrecision, xCursorPosition, yCursorPosition);
 
     for (uint32_t i = 0; i < getPointerCount(); i++) {
         if (i) {
diff --git a/services/inputflinger/dispatcher/Entry.h b/services/inputflinger/dispatcher/Entry.h
index 06d5c7d..f2f31d8 100644
--- a/services/inputflinger/dispatcher/Entry.h
+++ b/services/inputflinger/dispatcher/Entry.h
@@ -120,7 +120,7 @@
 struct KeyEntry : EventEntry {
     int32_t deviceId;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId;
     int32_t action;
     int32_t keyCode;
     int32_t scanCode;
@@ -144,9 +144,9 @@
     mutable int32_t repeatCount;
 
     KeyEntry(int32_t id, std::shared_ptr<InjectionState> injectionState, nsecs_t eventTime,
-             int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
-             int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode, int32_t metaState,
-             int32_t repeatCount, nsecs_t downTime);
+             int32_t deviceId, uint32_t source, ui::LogicalDisplayId displayId,
+             uint32_t policyFlags, int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
+             int32_t metaState, int32_t repeatCount, nsecs_t downTime);
     std::string getDescription() const override;
 };
 
@@ -155,7 +155,7 @@
 struct MotionEntry : EventEntry {
     int32_t deviceId;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId;
     int32_t action;
     int32_t actionButton;
     int32_t flags;
@@ -175,11 +175,12 @@
     size_t getPointerCount() const { return pointerProperties.size(); }
 
     MotionEntry(int32_t id, std::shared_ptr<InjectionState> injectionState, nsecs_t eventTime,
-                int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
-                int32_t action, int32_t actionButton, int32_t flags, int32_t metaState,
-                int32_t buttonState, MotionClassification classification, int32_t edgeFlags,
-                float xPrecision, float yPrecision, float xCursorPosition, float yCursorPosition,
-                nsecs_t downTime, const std::vector<PointerProperties>& pointerProperties,
+                int32_t deviceId, uint32_t source, ui::LogicalDisplayId displayId,
+                uint32_t policyFlags, int32_t action, int32_t actionButton, int32_t flags,
+                int32_t metaState, int32_t buttonState, MotionClassification classification,
+                int32_t edgeFlags, float xPrecision, float yPrecision, float xCursorPosition,
+                float yCursorPosition, nsecs_t downTime,
+                const std::vector<PointerProperties>& pointerProperties,
                 const std::vector<PointerCoords>& pointerCoords);
     std::string getDescription() const override;
 };
@@ -205,9 +206,9 @@
 
 struct TouchModeEntry : EventEntry {
     bool inTouchMode;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId;
 
-    TouchModeEntry(int32_t id, nsecs_t eventTime, bool inTouchMode, int32_t displayId);
+    TouchModeEntry(int32_t id, nsecs_t eventTime, bool inTouchMode, ui::LogicalDisplayId displayId);
     std::string getDescription() const override;
 };
 
diff --git a/services/inputflinger/dispatcher/FocusResolver.cpp b/services/inputflinger/dispatcher/FocusResolver.cpp
index 0e4e79e..b374fad 100644
--- a/services/inputflinger/dispatcher/FocusResolver.cpp
+++ b/services/inputflinger/dispatcher/FocusResolver.cpp
@@ -41,12 +41,12 @@
     size_t operator()(const sp<T>& k) const { return std::hash<T*>()(k.get()); }
 };
 
-sp<IBinder> FocusResolver::getFocusedWindowToken(int32_t displayId) const {
+sp<IBinder> FocusResolver::getFocusedWindowToken(ui::LogicalDisplayId displayId) const {
     auto it = mFocusedWindowTokenByDisplay.find(displayId);
     return it != mFocusedWindowTokenByDisplay.end() ? it->second.second : nullptr;
 }
 
-std::optional<FocusRequest> FocusResolver::getFocusRequest(int32_t displayId) {
+std::optional<FocusRequest> FocusResolver::getFocusRequest(ui::LogicalDisplayId displayId) {
     auto it = mFocusRequestByDisplay.find(displayId);
     return it != mFocusRequestByDisplay.end() ? std::make_optional<>(it->second) : std::nullopt;
 }
@@ -58,7 +58,7 @@
  * we will check if the previous focus request is eligible to receive focus.
  */
 std::optional<FocusResolver::FocusChanges> FocusResolver::setInputWindows(
-        int32_t displayId, const std::vector<sp<WindowInfoHandle>>& windows) {
+        ui::LogicalDisplayId displayId, const std::vector<sp<WindowInfoHandle>>& windows) {
     std::string removeFocusReason;
 
     const std::optional<FocusRequest> request = getFocusRequest(displayId);
@@ -94,12 +94,11 @@
 
 std::optional<FocusResolver::FocusChanges> FocusResolver::setFocusedWindow(
         const FocusRequest& request, const std::vector<sp<WindowInfoHandle>>& windows) {
-    const int32_t displayId = request.displayId;
+    const ui::LogicalDisplayId displayId = ui::LogicalDisplayId{request.displayId};
     const sp<IBinder> currentFocus = getFocusedWindowToken(displayId);
     if (currentFocus == request.token) {
-        ALOGD_IF(DEBUG_FOCUS,
-                 "setFocusedWindow %s on display %" PRId32 " ignored, reason: already focused",
-                 request.windowName.c_str(), displayId);
+        ALOGD_IF(DEBUG_FOCUS, "setFocusedWindow %s on display %s ignored, reason: already focused",
+                 request.windowName.c_str(), displayId.toString().c_str());
         return std::nullopt;
     }
 
@@ -193,7 +192,7 @@
 }
 
 std::optional<FocusResolver::FocusChanges> FocusResolver::updateFocusedWindow(
-        int32_t displayId, const std::string& reason, const sp<IBinder>& newFocus,
+        ui::LogicalDisplayId displayId, const std::string& reason, const sp<IBinder>& newFocus,
         const std::string& tokenName) {
     sp<IBinder> oldFocus = getFocusedWindowToken(displayId);
     if (newFocus == oldFocus) {
@@ -216,8 +215,8 @@
     std::string dump;
     dump += INDENT "FocusedWindows:\n";
     for (const auto& [displayId, namedToken] : mFocusedWindowTokenByDisplay) {
-        dump += base::StringPrintf(INDENT2 "displayId=%" PRId32 ", name='%s'\n", displayId,
-                                   namedToken.first.c_str());
+        dump += base::StringPrintf(INDENT2 "displayId=%s, name='%s'\n",
+                                   displayId.toString().c_str(), namedToken.first.c_str());
     }
     return dump;
 }
@@ -233,13 +232,14 @@
         auto it = mLastFocusResultByDisplay.find(displayId);
         std::string result =
                 it != mLastFocusResultByDisplay.end() ? ftl::enum_string(it->second) : "";
-        dump += base::StringPrintf(INDENT2 "displayId=%" PRId32 ", name='%s' result='%s'\n",
-                                   displayId, request.windowName.c_str(), result.c_str());
+        dump += base::StringPrintf(INDENT2 "displayId=%s, name='%s' result='%s'\n",
+                                   displayId.toString().c_str(), request.windowName.c_str(),
+                                   result.c_str());
     }
     return dump;
 }
 
-void FocusResolver::displayRemoved(int32_t displayId) {
+void FocusResolver::displayRemoved(ui::LogicalDisplayId displayId) {
     mFocusRequestByDisplay.erase(displayId);
     mLastFocusResultByDisplay.erase(displayId);
 }
diff --git a/services/inputflinger/dispatcher/FocusResolver.h b/services/inputflinger/dispatcher/FocusResolver.h
index 5bb157b..2910ba4 100644
--- a/services/inputflinger/dispatcher/FocusResolver.h
+++ b/services/inputflinger/dispatcher/FocusResolver.h
@@ -49,22 +49,23 @@
 class FocusResolver {
 public:
     // Returns the focused window token on the specified display.
-    sp<IBinder> getFocusedWindowToken(int32_t displayId) const;
+    sp<IBinder> getFocusedWindowToken(ui::LogicalDisplayId displayId) const;
 
     struct FocusChanges {
         sp<IBinder> oldFocus;
         sp<IBinder> newFocus;
-        int32_t displayId;
+        ui::LogicalDisplayId displayId;
         std::string reason;
     };
     std::optional<FocusResolver::FocusChanges> setInputWindows(
-            int32_t displayId, const std::vector<sp<android::gui::WindowInfoHandle>>& windows);
+            ui::LogicalDisplayId displayId,
+            const std::vector<sp<android::gui::WindowInfoHandle>>& windows);
     std::optional<FocusResolver::FocusChanges> setFocusedWindow(
             const android::gui::FocusRequest& request,
             const std::vector<sp<android::gui::WindowInfoHandle>>& windows);
 
     // Display has been removed from the system, clean up old references.
-    void displayRemoved(int32_t displayId);
+    void displayRemoved(ui::LogicalDisplayId displayId);
 
     // exposed for debugging
     bool hasFocusedWindowTokens() const { return !mFocusedWindowTokenByDisplay.empty(); }
@@ -105,20 +106,23 @@
     // the same token. Focus is tracked by the token per display and the events are dispatched
     // to the channel associated by this token.
     typedef std::pair<std::string /* name */, sp<IBinder>> NamedToken;
-    std::unordered_map<int32_t /* displayId */, NamedToken> mFocusedWindowTokenByDisplay;
+    std::unordered_map<ui::LogicalDisplayId /* displayId */, NamedToken>
+            mFocusedWindowTokenByDisplay;
 
     // This map will store the focus request per display. When the input window handles are updated,
     // the current request will be checked to see if it can be processed at that time.
-    std::unordered_map<int32_t /* displayId */, android::gui::FocusRequest> mFocusRequestByDisplay;
+    std::unordered_map<ui::LogicalDisplayId /* displayId */, android::gui::FocusRequest>
+            mFocusRequestByDisplay;
 
     // Last reason for not granting a focus request. This is used to add more debug information
     // in the event logs.
-    std::unordered_map<int32_t /* displayId */, Focusability> mLastFocusResultByDisplay;
+    std::unordered_map<ui::LogicalDisplayId /* displayId */, Focusability>
+            mLastFocusResultByDisplay;
 
     std::optional<FocusResolver::FocusChanges> updateFocusedWindow(
-            int32_t displayId, const std::string& reason, const sp<IBinder>& token,
+            ui::LogicalDisplayId displayId, const std::string& reason, const sp<IBinder>& token,
             const std::string& tokenName = "");
-    std::optional<android::gui::FocusRequest> getFocusRequest(int32_t displayId);
+    std::optional<android::gui::FocusRequest> getFocusRequest(ui::LogicalDisplayId displayId);
 };
 
 } // namespace android::inputdispatcher
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 79b8560..c4bfa62 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -571,8 +571,8 @@
 }
 
 // Returns true if the given window can accept pointer events at the given display location.
-bool windowAcceptsTouchAt(const WindowInfo& windowInfo, int32_t displayId, float x, float y,
-                          bool isStylus, const ui::Transform& displayTransform) {
+bool windowAcceptsTouchAt(const WindowInfo& windowInfo, ui::LogicalDisplayId displayId, float x,
+                          float y, bool isStylus, const ui::Transform& displayTransform) {
     const auto inputConfig = windowInfo.inputConfig;
     if (windowInfo.displayId != displayId ||
         inputConfig.test(WindowInfo::InputConfig::NOT_VISIBLE)) {
@@ -600,8 +600,8 @@
 
 // Returns true if the given window's frame can occlude pointer events at the given display
 // location.
-bool windowOccludesTouchAt(const WindowInfo& windowInfo, int displayId, float x, float y,
-                           const ui::Transform& displayTransform) {
+bool windowOccludesTouchAt(const WindowInfo& windowInfo, ui::LogicalDisplayId displayId, float x,
+                           float y, const ui::Transform& displayTransform) {
     if (windowInfo.displayId != displayId) {
         return false;
     }
@@ -815,9 +815,9 @@
 /**
  * Return true if stylus is currently down anywhere on the specified display, and false otherwise.
  */
-bool isStylusActiveInDisplay(
-        int32_t displayId,
-        const std::unordered_map<int32_t /*displayId*/, TouchState>& touchStatesByDisplay) {
+bool isStylusActiveInDisplay(ui::LogicalDisplayId displayId,
+                             const std::unordered_map<ui::LogicalDisplayId /*displayId*/,
+                                                      TouchState>& touchStatesByDisplay) {
     const auto it = touchStatesByDisplay.find(displayId);
     if (it == touchStatesByDisplay.end()) {
         return false;
@@ -918,8 +918,9 @@
         mDispatchFrozen(false),
         mInputFilterEnabled(false),
         mMaximumObscuringOpacityForTouch(1.0f),
-        mFocusedDisplayId(ADISPLAY_ID_DEFAULT),
+        mFocusedDisplayId(ui::ADISPLAY_ID_DEFAULT),
         mWindowTokenWithPointerCapture(nullptr),
+        mAwaitedApplicationDisplayId(ui::ADISPLAY_ID_NONE),
         mLatencyAggregator(),
         mLatencyTracker(&mLatencyAggregator) {
     mLooper = sp<Looper>::make(false);
@@ -1286,7 +1287,7 @@
     // If the application takes too long to catch up then we drop all events preceding
     // the touch into the other window.
     if (isPointerDownEvent && mAwaitedFocusedApplication != nullptr) {
-        const int32_t displayId = motionEntry.displayId;
+        const ui::LogicalDisplayId displayId = motionEntry.displayId;
         const auto [x, y] = resolveTouchedPosition(motionEntry);
         const bool isStylus = isPointerFromStylus(motionEntry, /*pointerIndex=*/0);
 
@@ -1411,8 +1412,8 @@
     }
 }
 
-sp<WindowInfoHandle> InputDispatcher::findTouchedWindowAtLocked(int32_t displayId, float x, float y,
-                                                                bool isStylus,
+sp<WindowInfoHandle> InputDispatcher::findTouchedWindowAtLocked(ui::LogicalDisplayId displayId,
+                                                                float x, float y, bool isStylus,
                                                                 bool ignoreDragWindow) const {
     // Traverse windows from front to back to find touched window.
     const auto& windowHandles = getWindowHandlesLocked(displayId);
@@ -1431,7 +1432,8 @@
 }
 
 std::vector<InputTarget> InputDispatcher::findOutsideTargetsLocked(
-        int32_t displayId, const sp<WindowInfoHandle>& touchedWindow, int32_t pointerId) const {
+        ui::LogicalDisplayId displayId, const sp<WindowInfoHandle>& touchedWindow,
+        int32_t pointerId) const {
     if (touchedWindow == nullptr) {
         return {};
     }
@@ -1458,7 +1460,7 @@
 }
 
 std::vector<sp<WindowInfoHandle>> InputDispatcher::findTouchedSpyWindowsAtLocked(
-        int32_t displayId, float x, float y, bool isStylus) const {
+        ui::LogicalDisplayId displayId, float x, float y, bool isStylus) const {
     // Traverse windows from front to back and gather the touched spy windows.
     std::vector<sp<WindowInfoHandle>> spyWindows;
     const auto& windowHandles = getWindowHandlesLocked(displayId);
@@ -1951,12 +1953,12 @@
 
 void InputDispatcher::logOutboundKeyDetails(const char* prefix, const KeyEntry& entry) {
     if (DEBUG_OUTBOUND_EVENT_DETAILS) {
-        ALOGD("%seventTime=%" PRId64 ", deviceId=%d, source=0x%x, displayId=%" PRId32 ", "
+        ALOGD("%seventTime=%" PRId64 ", deviceId=%d, source=0x%x, displayId=%s, "
               "policyFlags=0x%x, action=0x%x, flags=0x%x, keyCode=0x%x, scanCode=0x%x, "
               "metaState=0x%x, repeatCount=%d, downTime=%" PRId64,
-              prefix, entry.eventTime, entry.deviceId, entry.source, entry.displayId,
-              entry.policyFlags, entry.action, entry.flags, entry.keyCode, entry.scanCode,
-              entry.metaState, entry.repeatCount, entry.downTime);
+              prefix, entry.eventTime, entry.deviceId, entry.source,
+              entry.displayId.toString().c_str(), entry.policyFlags, entry.action, entry.flags,
+              entry.keyCode, entry.scanCode, entry.metaState, entry.repeatCount, entry.downTime);
     }
 }
 
@@ -2105,16 +2107,15 @@
 
 void InputDispatcher::logOutboundMotionDetails(const char* prefix, const MotionEntry& entry) {
     if (DEBUG_OUTBOUND_EVENT_DETAILS) {
-        ALOGD("%seventTime=%" PRId64 ", deviceId=%d, source=%s, displayId=%" PRId32
-              ", policyFlags=0x%x, "
+        ALOGD("%seventTime=%" PRId64 ", deviceId=%d, source=%s, displayId=%s, policyFlags=0x%x, "
               "action=%s, actionButton=0x%x, flags=0x%x, "
               "metaState=0x%x, buttonState=0x%x,"
               "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, downTime=%" PRId64,
               prefix, entry.eventTime, entry.deviceId,
-              inputEventSourceToString(entry.source).c_str(), entry.displayId, entry.policyFlags,
-              MotionEvent::actionToString(entry.action).c_str(), entry.actionButton, entry.flags,
-              entry.metaState, entry.buttonState, entry.edgeFlags, entry.xPrecision,
-              entry.yPrecision, entry.downTime);
+              inputEventSourceToString(entry.source).c_str(), entry.displayId.toString().c_str(),
+              entry.policyFlags, MotionEvent::actionToString(entry.action).c_str(),
+              entry.actionButton, entry.flags, entry.metaState, entry.buttonState, entry.edgeFlags,
+              entry.xPrecision, entry.yPrecision, entry.downTime);
 
         for (uint32_t i = 0; i < entry.getPointerCount(); i++) {
             ALOGD("  Pointer %d: id=%d, toolType=%s, "
@@ -2199,8 +2200,8 @@
  * then it should be dispatched to that display. Otherwise, the event goes to the focused display.
  * Focused display is the display that the user most recently interacted with.
  */
-int32_t InputDispatcher::getTargetDisplayId(const EventEntry& entry) {
-    int32_t displayId;
+ui::LogicalDisplayId InputDispatcher::getTargetDisplayId(const EventEntry& entry) {
+    ui::LogicalDisplayId displayId{ui::ADISPLAY_ID_NONE};
     switch (entry.type) {
         case EventEntry::Type::KEY: {
             const KeyEntry& keyEntry = static_cast<const KeyEntry&>(entry);
@@ -2220,10 +2221,10 @@
         case EventEntry::Type::SENSOR:
         case EventEntry::Type::DRAG: {
             ALOGE("%s events do not have a target display", ftl::enum_string(entry.type).c_str());
-            return ADISPLAY_ID_NONE;
+            return ui::ADISPLAY_ID_NONE;
         }
     }
-    return displayId == ADISPLAY_ID_NONE ? mFocusedDisplayId : displayId;
+    return displayId == ui::ADISPLAY_ID_NONE ? mFocusedDisplayId : displayId;
 }
 
 bool InputDispatcher::shouldWaitToSendKeyLocked(nsecs_t currentTime,
@@ -2262,7 +2263,7 @@
         InputEventInjectionResult& outInjectionResult) {
     outInjectionResult = InputEventInjectionResult::FAILED; // Default result
 
-    int32_t displayId = getTargetDisplayId(entry);
+    ui::LogicalDisplayId displayId = getTargetDisplayId(entry);
     sp<WindowInfoHandle> focusedWindowHandle = getFocusedWindowHandleLocked(displayId);
     std::shared_ptr<InputApplicationHandle> focusedApplicationHandle =
             getValueByKey(mFocusedApplicationHandlesByDisplay, displayId);
@@ -2271,8 +2272,8 @@
     // then drop the event.
     if (focusedWindowHandle == nullptr && focusedApplicationHandle == nullptr) {
         ALOGI("Dropping %s event because there is no focused window or focused application in "
-              "display %" PRId32 ".",
-              ftl::enum_string(entry.type).c_str(), displayId);
+              "display %s.",
+              ftl::enum_string(entry.type).c_str(), displayId.toString().c_str());
         return nullptr;
     }
 
@@ -2380,7 +2381,7 @@
     std::vector<InputTarget> targets;
     // For security reasons, we defer updating the touch state until we are sure that
     // event injection will be allowed.
-    const int32_t displayId = entry.displayId;
+    const ui::LogicalDisplayId displayId = entry.displayId;
     const int32_t action = entry.action;
     const int32_t maskedAction = MotionEvent::getActionMasked(action);
 
@@ -2450,7 +2451,8 @@
         }
         // Handle the case where we did not find a window.
         if (newTouchedWindowHandle == nullptr) {
-            ALOGD("No new touched window at (%.1f, %.1f) in display %" PRId32, x, y, displayId);
+            ALOGD("No new touched window at (%.1f, %.1f) in display %s", x, y,
+                  displayId.toString().c_str());
             // Try to assign the pointer to the first foreground window we find, if there is one.
             newTouchedWindowHandle = tempTouchState.getFirstForegroundWindowHandle(entry.deviceId);
         }
@@ -2491,8 +2493,8 @@
 
         if (newTouchedWindows.empty()) {
             ALOGI("Dropping event because there is no touchable window at (%.1f, %.1f) on display "
-                  "%d.",
-                  x, y, displayId);
+                  "%s.",
+                  x, y, displayId.toString().c_str());
             outInjectionResult = InputEventInjectionResult::FAILED;
             return {};
         }
@@ -2640,9 +2642,9 @@
 
             if (newTouchedWindowHandle != nullptr &&
                 !haveSameToken(oldTouchedWindowHandle, newTouchedWindowHandle)) {
-                ALOGI("Touch is slipping out of window %s into window %s in display %" PRId32,
+                ALOGI("Touch is slipping out of window %s into window %s in display %s",
                       oldTouchedWindowHandle->getName().c_str(),
-                      newTouchedWindowHandle->getName().c_str(), displayId);
+                      newTouchedWindowHandle->getName().c_str(), displayId.toString().c_str());
 
                 // Make a slippery exit from the old window.
                 std::bitset<MAX_POINTER_ID + 1> pointerIds;
@@ -2827,7 +2829,7 @@
     // Save changes unless the action was scroll in which case the temporary touch
     // state was only valid for this one action.
     if (maskedAction != AMOTION_EVENT_ACTION_SCROLL) {
-        if (displayId >= 0) {
+        if (displayId >= ui::ADISPLAY_ID_DEFAULT) {
             tempTouchState.clearWindowsWithoutPointers();
             mTouchStatesByDisplay[displayId] = tempTouchState;
         } else {
@@ -2842,7 +2844,7 @@
     return targets;
 }
 
-void InputDispatcher::finishDragAndDrop(int32_t displayId, float x, float y) {
+void InputDispatcher::finishDragAndDrop(ui::LogicalDisplayId displayId, float x, float y) {
     // Prevent stylus interceptor windows from affecting drag and drop behavior for now, until we
     // have an explicit reason to support it.
     constexpr bool isStylus = false;
@@ -3059,7 +3061,7 @@
 }
 
 void InputDispatcher::addGlobalMonitoringTargetsLocked(std::vector<InputTarget>& inputTargets,
-                                                       int32_t displayId) {
+                                                       ui::LogicalDisplayId displayId) {
     auto monitorsIt = mGlobalMonitorsByDisplay.find(displayId);
     if (monitorsIt == mGlobalMonitorsByDisplay.end()) return;
 
@@ -3131,7 +3133,7 @@
 InputDispatcher::TouchOcclusionInfo InputDispatcher::computeTouchOcclusionInfoLocked(
         const sp<WindowInfoHandle>& windowHandle, float x, float y) const {
     const WindowInfo* windowInfo = windowHandle->getInfo();
-    int32_t displayId = windowInfo->displayId;
+    ui::LogicalDisplayId displayId = windowInfo->displayId;
     const std::vector<sp<WindowInfoHandle>>& windowHandles = getWindowHandlesLocked(displayId);
     TouchOcclusionInfo info;
     info.hasBlockingOcclusion = false;
@@ -3215,7 +3217,7 @@
 
 bool InputDispatcher::isWindowObscuredAtPointLocked(const sp<WindowInfoHandle>& windowHandle,
                                                     float x, float y) const {
-    int32_t displayId = windowHandle->getInfo()->displayId;
+    ui::LogicalDisplayId displayId = windowHandle->getInfo()->displayId;
     const std::vector<sp<WindowInfoHandle>>& windowHandles = getWindowHandlesLocked(displayId);
     for (const sp<WindowInfoHandle>& otherHandle : windowHandles) {
         if (windowHandle == otherHandle) {
@@ -3231,7 +3233,7 @@
 }
 
 bool InputDispatcher::isWindowObscuredLocked(const sp<WindowInfoHandle>& windowHandle) const {
-    int32_t displayId = windowHandle->getInfo()->displayId;
+    ui::LogicalDisplayId displayId = windowHandle->getInfo()->displayId;
     const std::vector<sp<WindowInfoHandle>>& windowHandles = getWindowHandlesLocked(displayId);
     const WindowInfo* windowInfo = windowHandle->getInfo();
     for (const sp<WindowInfoHandle>& otherHandle : windowHandles) {
@@ -3239,8 +3241,7 @@
             break; // All future windows are below us. Exit early.
         }
         const WindowInfo* otherInfo = otherHandle->getInfo();
-        if (canBeObscuredBy(windowHandle, otherHandle) &&
-            otherInfo->overlaps(windowInfo)) {
+        if (canBeObscuredBy(windowHandle, otherHandle) && otherInfo->overlaps(windowInfo)) {
             return true;
         }
     }
@@ -3282,7 +3283,7 @@
         }
     }
 
-    int32_t displayId = getTargetDisplayId(eventEntry);
+    ui::LogicalDisplayId displayId = getTargetDisplayId(eventEntry);
     sp<WindowInfoHandle> focusedWindowHandle = getFocusedWindowHandleLocked(displayId);
     const WindowInfo* windowDisablingUserActivityInfo = nullptr;
     if (focusedWindowHandle != nullptr) {
@@ -4465,12 +4466,13 @@
 void InputDispatcher::notifyKey(const NotifyKeyArgs& args) {
     ALOGD_IF(debugInboundEventDetails(),
              "notifyKey - id=%" PRIx32 ", eventTime=%" PRId64
-             ", deviceId=%d, source=%s, displayId=%" PRId32
-             "policyFlags=0x%x, action=%s, flags=0x%x, keyCode=%s, scanCode=0x%x, metaState=0x%x, "
+             ", deviceId=%d, source=%s, displayId=%s, policyFlags=0x%x, action=%s, flags=0x%x, "
+             "keyCode=%s, scanCode=0x%x, metaState=0x%x, "
              "downTime=%" PRId64,
              args.id, args.eventTime, args.deviceId, inputEventSourceToString(args.source).c_str(),
-             args.displayId, args.policyFlags, KeyEvent::actionToString(args.action), args.flags,
-             KeyEvent::getLabel(args.keyCode), args.scanCode, args.metaState, args.downTime);
+             args.displayId.toString().c_str(), args.policyFlags,
+             KeyEvent::actionToString(args.action), args.flags, KeyEvent::getLabel(args.keyCode),
+             args.scanCode, args.metaState, args.downTime);
     Result<void> keyCheck = validateKeyEvent(args.action);
     if (!keyCheck.ok()) {
         LOG(ERROR) << "invalid key event: " << keyCheck.error();
@@ -4546,15 +4548,15 @@
 void InputDispatcher::notifyMotion(const NotifyMotionArgs& args) {
     if (debugInboundEventDetails()) {
         ALOGD("notifyMotion - id=%" PRIx32 " eventTime=%" PRId64 ", deviceId=%d, source=%s, "
-              "displayId=%" PRId32 ", policyFlags=0x%x, "
+              "displayId=%s, policyFlags=0x%x, "
               "action=%s, actionButton=0x%x, flags=0x%x, metaState=0x%x, buttonState=0x%x, "
               "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, xCursorPosition=%f, "
               "yCursorPosition=%f, downTime=%" PRId64,
               args.id, args.eventTime, args.deviceId, inputEventSourceToString(args.source).c_str(),
-              args.displayId, args.policyFlags, MotionEvent::actionToString(args.action).c_str(),
-              args.actionButton, args.flags, args.metaState, args.buttonState, args.edgeFlags,
-              args.xPrecision, args.yPrecision, args.xCursorPosition, args.yCursorPosition,
-              args.downTime);
+              args.displayId.toString().c_str(), args.policyFlags,
+              MotionEvent::actionToString(args.action).c_str(), args.actionButton, args.flags,
+              args.metaState, args.buttonState, args.edgeFlags, args.xPrecision, args.yPrecision,
+              args.xCursorPosition, args.yCursorPosition, args.downTime);
         for (uint32_t i = 0; i < args.getPointerCount(); i++) {
             ALOGD("  Pointer %d: id=%d, toolType=%s, x=%f, y=%f, pressure=%f, size=%f, "
                   "touchMajor=%f, touchMinor=%f, toolMajor=%f, toolMinor=%f, orientation=%f",
@@ -4583,7 +4585,8 @@
     if (DEBUG_VERIFY_EVENTS) {
         auto [it, _] =
                 mVerifiersByDisplay.try_emplace(args.displayId,
-                                                StringPrintf("display %" PRId32, args.displayId));
+                                                StringPrintf("display %s",
+                                                             args.displayId.toString().c_str()));
         Result<void> result =
                 it->second.processMovement(args.deviceId, args.source, args.action,
                                            args.getPointerCount(), args.pointerProperties.data(),
@@ -4857,8 +4860,9 @@
             const bool isPointerEvent =
                     isFromSource(event->getSource(), AINPUT_SOURCE_CLASS_POINTER);
             // If a pointer event has no displayId specified, inject it to the default display.
-            const int32_t displayId = isPointerEvent && (event->getDisplayId() == ADISPLAY_ID_NONE)
-                    ? ADISPLAY_ID_DEFAULT
+            const ui::LogicalDisplayId displayId =
+                    isPointerEvent && (event->getDisplayId() == ui::ADISPLAY_ID_NONE)
+                    ? ui::ADISPLAY_ID_DEFAULT
                     : event->getDisplayId();
             int32_t flags = motionEvent.getFlags();
 
@@ -5125,22 +5129,21 @@
 }
 
 const std::vector<sp<WindowInfoHandle>>& InputDispatcher::getWindowHandlesLocked(
-        int32_t displayId) const {
+        ui::LogicalDisplayId displayId) const {
     static const std::vector<sp<WindowInfoHandle>> EMPTY_WINDOW_HANDLES;
     auto it = mWindowHandlesByDisplay.find(displayId);
     return it != mWindowHandlesByDisplay.end() ? it->second : EMPTY_WINDOW_HANDLES;
 }
 
 sp<WindowInfoHandle> InputDispatcher::getWindowHandleLocked(
-        const sp<IBinder>& windowHandleToken, std::optional<int32_t> displayId) const {
+        const sp<IBinder>& windowHandleToken, std::optional<ui::LogicalDisplayId> displayId) const {
     if (windowHandleToken == nullptr) {
         return nullptr;
     }
 
     if (!displayId) {
         // Look through all displays.
-        for (auto& it : mWindowHandlesByDisplay) {
-            const std::vector<sp<WindowInfoHandle>>& windowHandles = it.second;
+        for (const auto& [_, windowHandles] : mWindowHandlesByDisplay) {
             for (const sp<WindowInfoHandle>& windowHandle : windowHandles) {
                 if (windowHandle->getToken() == windowHandleToken) {
                     return windowHandle;
@@ -5161,16 +5164,15 @@
 
 sp<WindowInfoHandle> InputDispatcher::getWindowHandleLocked(
         const sp<WindowInfoHandle>& windowHandle) const {
-    for (auto& it : mWindowHandlesByDisplay) {
-        const std::vector<sp<WindowInfoHandle>>& windowHandles = it.second;
+    for (const auto& [displayId, windowHandles] : mWindowHandlesByDisplay) {
         for (const sp<WindowInfoHandle>& handle : windowHandles) {
             if (handle->getId() == windowHandle->getId() &&
                 handle->getToken() == windowHandle->getToken()) {
-                if (windowHandle->getInfo()->displayId != it.first) {
-                    ALOGE("Found window %s in display %" PRId32
-                          ", but it should belong to display %" PRId32,
-                          windowHandle->getName().c_str(), it.first,
-                          windowHandle->getInfo()->displayId);
+                if (windowHandle->getInfo()->displayId != displayId) {
+                    ALOGE("Found window %s in display %s"
+                          ", but it should belong to display %s",
+                          windowHandle->getName().c_str(), displayId.toString().c_str(),
+                          windowHandle->getInfo()->displayId.toString().c_str());
                 }
                 return handle;
             }
@@ -5179,12 +5181,13 @@
     return nullptr;
 }
 
-sp<WindowInfoHandle> InputDispatcher::getFocusedWindowHandleLocked(int displayId) const {
+sp<WindowInfoHandle> InputDispatcher::getFocusedWindowHandleLocked(
+        ui::LogicalDisplayId displayId) const {
     sp<IBinder> focusedToken = mFocusResolver.getFocusedWindowToken(displayId);
     return getWindowHandleLocked(focusedToken, displayId);
 }
 
-ui::Transform InputDispatcher::getTransformLocked(int32_t displayId) const {
+ui::Transform InputDispatcher::getTransformLocked(ui::LogicalDisplayId displayId) const {
     auto displayInfoIt = mDisplayInfos.find(displayId);
     return displayInfoIt != mDisplayInfos.end() ? displayInfoIt->second.transform
                                                 : kIdentityTransform;
@@ -5253,7 +5256,8 @@
 }
 
 void InputDispatcher::updateWindowHandlesForDisplayLocked(
-        const std::vector<sp<WindowInfoHandle>>& windowInfoHandles, int32_t displayId) {
+        const std::vector<sp<WindowInfoHandle>>& windowInfoHandles,
+        ui::LogicalDisplayId displayId) {
     if (windowInfoHandles.empty()) {
         // Remove all handles on a display if there are no windows left.
         mWindowHandlesByDisplay.erase(displayId);
@@ -5285,13 +5289,14 @@
         }
 
         if (info->displayId != displayId) {
-            ALOGE("Window %s updated by wrong display %d, should belong to display %d",
-                  handle->getName().c_str(), displayId, info->displayId);
+            ALOGE("Window %s updated by wrong display %s, should belong to display %s",
+                  handle->getName().c_str(), displayId.toString().c_str(),
+                  info->displayId.toString().c_str());
             continue;
         }
 
         if ((oldHandlesById.find(handle->getId()) != oldHandlesById.end()) &&
-                (oldHandlesById.at(handle->getId())->getToken() == handle->getToken())) {
+            (oldHandlesById.at(handle->getId())->getToken() == handle->getToken())) {
             const sp<WindowInfoHandle>& oldHandle = oldHandlesById.at(handle->getId());
             oldHandle->updateFrom(handle);
             newHandles.push_back(oldHandle);
@@ -5312,7 +5317,8 @@
  * For removed handle, check if need to send a cancel event if already in touch.
  */
 void InputDispatcher::setInputWindowsLocked(
-        const std::vector<sp<WindowInfoHandle>>& windowInfoHandles, int32_t displayId) {
+        const std::vector<sp<WindowInfoHandle>>& windowInfoHandles,
+        ui::LogicalDisplayId displayId) {
     if (DEBUG_FOCUS) {
         std::string windowList;
         for (const sp<WindowInfoHandle>& iwh : windowInfoHandles) {
@@ -5417,9 +5423,10 @@
 }
 
 void InputDispatcher::setFocusedApplication(
-        int32_t displayId, const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) {
+        ui::LogicalDisplayId displayId,
+        const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) {
     if (DEBUG_FOCUS) {
-        ALOGD("setFocusedApplication displayId=%" PRId32 " %s", displayId,
+        ALOGD("setFocusedApplication displayId=%s %s", displayId.toString().c_str(),
               inputApplicationHandle ? inputApplicationHandle->getName().c_str() : "<nullptr>");
     }
     { // acquire lock
@@ -5432,7 +5439,8 @@
 }
 
 void InputDispatcher::setFocusedApplicationLocked(
-        int32_t displayId, const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) {
+        ui::LogicalDisplayId displayId,
+        const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) {
     std::shared_ptr<InputApplicationHandle> oldFocusedApplicationHandle =
             getValueByKey(mFocusedApplicationHandlesByDisplay, displayId);
 
@@ -5469,9 +5477,9 @@
  * cancel all the unreleased display-unspecified events for the focused window on the old focused
  * display. The display-specified events won't be affected.
  */
-void InputDispatcher::setFocusedDisplay(int32_t displayId) {
+void InputDispatcher::setFocusedDisplay(ui::LogicalDisplayId displayId) {
     if (DEBUG_FOCUS) {
-        ALOGD("setFocusedDisplay displayId=%" PRId32, displayId);
+        ALOGD("setFocusedDisplay displayId=%s", displayId.toString().c_str());
     }
     { // acquire lock
         std::scoped_lock _l(mLock);
@@ -5490,7 +5498,7 @@
                         options(CancelationOptions::Mode::CANCEL_NON_POINTER_EVENTS,
                                 "The display which contains this window no longer has focus.",
                                 traceContext.getTracker());
-                options.displayId = ADISPLAY_ID_NONE;
+                options.displayId = ui::ADISPLAY_ID_NONE;
                 synthesizeCancelationEventsForWindowLocked(windowHandle, options);
             }
             mFocusedDisplayId = displayId;
@@ -5500,7 +5508,8 @@
             sendFocusChangedCommandLocked(oldFocusedWindowToken, newFocusedWindowToken);
 
             if (newFocusedWindowToken == nullptr) {
-                ALOGW("Focused display #%" PRId32 " does not have a focused window.", displayId);
+                ALOGW("Focused display #%s does not have a focused window.",
+                      displayId.toString().c_str());
                 if (mFocusResolver.hasFocusedWindowTokens()) {
                     ALOGE("But another display has a focused window\n%s",
                           mFocusResolver.dumpFocusedWindows().c_str());
@@ -5566,15 +5575,15 @@
 }
 
 bool InputDispatcher::setInTouchMode(bool inTouchMode, gui::Pid pid, gui::Uid uid,
-                                     bool hasPermission, int32_t displayId) {
+                                     bool hasPermission, ui::LogicalDisplayId displayId) {
     bool needWake = false;
     {
         std::scoped_lock lock(mLock);
         ALOGD_IF(DEBUG_TOUCH_MODE,
                  "Request to change touch mode to %s (calling pid=%s, uid=%s, "
-                 "hasPermission=%s, target displayId=%d, mTouchModePerDisplay[displayId]=%s)",
+                 "hasPermission=%s, target displayId=%s, mTouchModePerDisplay[displayId]=%s)",
                  toString(inTouchMode), pid.toString().c_str(), uid.toString().c_str(),
-                 toString(hasPermission), displayId,
+                 toString(hasPermission), displayId.toString().c_str(),
                  mTouchModePerDisplay.count(displayId) == 0
                          ? "not set"
                          : std::to_string(mTouchModePerDisplay[displayId]).c_str());
@@ -5632,7 +5641,7 @@
     mMaximumObscuringOpacityForTouch = opacity;
 }
 
-std::tuple<TouchState*, TouchedWindow*, int32_t /*displayId*/>
+std::tuple<TouchState*, TouchedWindow*, ui::LogicalDisplayId /*displayId*/>
 InputDispatcher::findTouchStateWindowAndDisplayLocked(const sp<IBinder>& token) {
     for (auto& [displayId, state] : mTouchStatesByDisplay) {
         for (TouchedWindow& w : state.windows) {
@@ -5641,7 +5650,7 @@
             }
         }
     }
-    return std::make_tuple(nullptr, nullptr, ADISPLAY_ID_DEFAULT);
+    return std::make_tuple(nullptr, nullptr, ui::ADISPLAY_ID_DEFAULT);
 }
 
 bool InputDispatcher::transferTouchGesture(const sp<IBinder>& fromToken, const sp<IBinder>& toToken,
@@ -5748,10 +5757,11 @@
  * Return null if there are no windows touched on that display, or if more than one foreground
  * window is being touched.
  */
-sp<WindowInfoHandle> InputDispatcher::findTouchedForegroundWindowLocked(int32_t displayId) const {
+sp<WindowInfoHandle> InputDispatcher::findTouchedForegroundWindowLocked(
+        ui::LogicalDisplayId displayId) const {
     auto stateIt = mTouchStatesByDisplay.find(displayId);
     if (stateIt == mTouchStatesByDisplay.end()) {
-        ALOGI("No touch state on display %" PRId32, displayId);
+        ALOGI("No touch state on display %s", displayId.toString().c_str());
         return nullptr;
     }
 
@@ -5774,14 +5784,14 @@
 
 // Binder call
 bool InputDispatcher::transferTouchOnDisplay(const sp<IBinder>& destChannelToken,
-                                             int32_t displayId) {
+                                             ui::LogicalDisplayId displayId) {
     sp<IBinder> fromToken;
     { // acquire lock
         std::scoped_lock _l(mLock);
         sp<WindowInfoHandle> toWindowHandle = getWindowHandleLocked(destChannelToken, displayId);
         if (toWindowHandle == nullptr) {
-            ALOGW("Could not find window associated with token=%p on display %" PRId32,
-                  destChannelToken.get(), displayId);
+            ALOGW("Could not find window associated with token=%p on display %s",
+                  destChannelToken.get(), displayId.toString().c_str());
             return false;
         }
 
@@ -5850,18 +5860,19 @@
     dump += StringPrintf(INDENT "DispatchEnabled: %s\n", toString(mDispatchEnabled));
     dump += StringPrintf(INDENT "DispatchFrozen: %s\n", toString(mDispatchFrozen));
     dump += StringPrintf(INDENT "InputFilterEnabled: %s\n", toString(mInputFilterEnabled));
-    dump += StringPrintf(INDENT "FocusedDisplayId: %" PRId32 "\n", mFocusedDisplayId);
+    dump += StringPrintf(INDENT "FocusedDisplayId: %s\n", mFocusedDisplayId.toString().c_str());
 
     if (!mFocusedApplicationHandlesByDisplay.empty()) {
         dump += StringPrintf(INDENT "FocusedApplications:\n");
         for (auto& it : mFocusedApplicationHandlesByDisplay) {
-            const int32_t displayId = it.first;
+            const ui::LogicalDisplayId displayId = it.first;
             const std::shared_ptr<InputApplicationHandle>& applicationHandle = it.second;
             const std::chrono::duration timeout =
                     applicationHandle->getDispatchingTimeout(DEFAULT_INPUT_DISPATCHING_TIMEOUT);
-            dump += StringPrintf(INDENT2 "displayId=%" PRId32
-                                         ", name='%s', dispatchingTimeout=%" PRId64 "ms\n",
-                                 displayId, applicationHandle->getName().c_str(), millis(timeout));
+            dump += StringPrintf(INDENT2 "displayId=%s, name='%s', dispatchingTimeout=%" PRId64
+                                         "ms\n",
+                                 displayId.toString().c_str(), applicationHandle->getName().c_str(),
+                                 millis(timeout));
         }
     } else {
         dump += StringPrintf(INDENT "FocusedApplications: <none>\n");
@@ -5874,7 +5885,7 @@
         dump += StringPrintf(INDENT "TouchStatesByDisplay:\n");
         for (const auto& [displayId, state] : mTouchStatesByDisplay) {
             std::string touchStateDump = addLinePrefix(state.dump(), INDENT2);
-            dump += INDENT2 + std::to_string(displayId) + " : " + touchStateDump;
+            dump += INDENT2 + displayId.toString() + " : " + touchStateDump;
         }
     } else {
         dump += INDENT "TouchStates: <no displays touched>\n";
@@ -5887,7 +5898,7 @@
 
     if (!mWindowHandlesByDisplay.empty()) {
         for (const auto& [displayId, windowHandles] : mWindowHandlesByDisplay) {
-            dump += StringPrintf(INDENT "Display: %" PRId32 "\n", displayId);
+            dump += StringPrintf(INDENT "Display: %s\n", displayId.toString().c_str());
             if (const auto& it = mDisplayInfos.find(displayId); it != mDisplayInfos.end()) {
                 const auto& displayInfo = it->second;
                 dump += StringPrintf(INDENT2 "logicalSize=%dx%d\n", displayInfo.logicalWidth,
@@ -5913,7 +5924,8 @@
 
     if (!mGlobalMonitorsByDisplay.empty()) {
         for (const auto& [displayId, monitors] : mGlobalMonitorsByDisplay) {
-            dump += StringPrintf(INDENT "Global monitors on display %d:\n", displayId);
+            dump += StringPrintf(INDENT "Global monitors on display %s:\n",
+                                 displayId.toString().c_str());
             dumpMonitors(dump, monitors);
         }
     } else {
@@ -6002,8 +6014,8 @@
     if (!mTouchModePerDisplay.empty()) {
         dump += INDENT "TouchModePerDisplay:\n";
         for (const auto& [displayId, touchMode] : mTouchModePerDisplay) {
-            dump += StringPrintf(INDENT2 "Display: %" PRId32 " TouchMode: %s\n", displayId,
-                                 std::to_string(touchMode).c_str());
+            dump += StringPrintf(INDENT2 "Display: %s TouchMode: %s\n",
+                                 displayId.toString().c_str(), std::to_string(touchMode).c_str());
         }
     } else {
         dump += INDENT "TouchModePerDisplay: <none>\n";
@@ -6076,9 +6088,8 @@
     return clientChannel;
 }
 
-Result<std::unique_ptr<InputChannel>> InputDispatcher::createInputMonitor(int32_t displayId,
-                                                                          const std::string& name,
-                                                                          gui::Pid pid) {
+Result<std::unique_ptr<InputChannel>> InputDispatcher::createInputMonitor(
+        ui::LogicalDisplayId displayId, const std::string& name, gui::Pid pid) {
     std::unique_ptr<InputChannel> serverChannel;
     std::unique_ptr<InputChannel> clientChannel;
     status_t result = InputChannel::openInputChannelPair(name, serverChannel, clientChannel);
@@ -6089,7 +6100,7 @@
     { // acquire lock
         std::scoped_lock _l(mLock);
 
-        if (displayId < 0) {
+        if (displayId < ui::ADISPLAY_ID_DEFAULT) {
             return base::Error(BAD_VALUE) << "Attempted to create input monitor with name " << name
                                           << " without a specified display.";
         }
@@ -6274,7 +6285,8 @@
     mLooper->wake();
 }
 
-void InputDispatcher::setDisplayEligibilityForPointerCapture(int32_t displayId, bool isEligible) {
+void InputDispatcher::setDisplayEligibilityForPointerCapture(ui::LogicalDisplayId displayId,
+                                                             bool isEligible) {
     { // acquire lock
         std::scoped_lock _l(mLock);
         std::erase(mIneligibleDisplaysForPointerCapture, displayId);
@@ -6850,7 +6862,9 @@
     { // acquire lock
         std::scoped_lock _l(mLock);
         std::optional<FocusResolver::FocusChanges> changes =
-                mFocusResolver.setFocusedWindow(request, getWindowHandlesLocked(request.displayId));
+                mFocusResolver.setFocusedWindow(request,
+                                                getWindowHandlesLocked(
+                                                        ui::LogicalDisplayId{request.displayId}));
         ScopedSyntheticEventTracer traceContext(mTracer);
         if (changes) {
             onFocusChangedLocked(*changes, traceContext.getTracker());
@@ -6934,7 +6948,7 @@
     postCommandLocked(std::move(command));
 }
 
-void InputDispatcher::displayRemoved(int32_t displayId) {
+void InputDispatcher::displayRemoved(ui::LogicalDisplayId displayId) {
     { // acquire lock
         std::scoped_lock _l(mLock);
         // Set an empty list to remove all handles from the specific display.
@@ -6966,7 +6980,7 @@
     };
     // The listener sends the windows as a flattened array. Separate the windows by display for
     // more convenient parsing.
-    std::unordered_map<int32_t, std::vector<sp<WindowInfoHandle>>> handlesPerDisplay;
+    std::unordered_map<ui::LogicalDisplayId, std::vector<sp<WindowInfoHandle>>> handlesPerDisplay;
     for (const auto& info : update.windowInfos) {
         handlesPerDisplay.emplace(info.displayId, std::vector<sp<WindowInfoHandle>>());
         handlesPerDisplay[info.displayId].push_back(sp<WindowInfoHandle>::make(info));
@@ -7008,10 +7022,10 @@
                  WindowInfo::InputConfig::DROP_INPUT_IF_OBSCURED) &&
          isWindowObscuredLocked(windowHandle))) {
         ALOGW("Dropping %s event targeting %s as requested by the input configuration {%s} on "
-              "display %" PRId32 ".",
+              "display %s.",
               ftl::enum_string(entry.type).c_str(), windowHandle->getName().c_str(),
               windowHandle->getInfo()->inputConfig.string().c_str(),
-              windowHandle->getInfo()->displayId);
+              windowHandle->getInfo()->displayId.toString().c_str());
         return true;
     }
     return false;
@@ -7155,8 +7169,9 @@
     mConfig.keyRepeatDelay = delay.count();
 }
 
-bool InputDispatcher::isPointerInWindow(const sp<android::IBinder>& token, int32_t displayId,
-                                        DeviceId deviceId, int32_t pointerId) {
+bool InputDispatcher::isPointerInWindow(const sp<android::IBinder>& token,
+                                        ui::LogicalDisplayId displayId, DeviceId deviceId,
+                                        int32_t pointerId) {
     std::scoped_lock _l(mLock);
     auto touchStateIt = mTouchStatesByDisplay.find(displayId);
     if (touchStateIt == mTouchStatesByDisplay.end()) {
diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index 3d127c2..f671ea7 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -114,35 +114,37 @@
     std::unique_ptr<VerifiedInputEvent> verifyInputEvent(const InputEvent& event) override;
 
     void setFocusedApplication(
-            int32_t displayId,
+            ui::LogicalDisplayId displayId,
             const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) override;
-    void setFocusedDisplay(int32_t displayId) override;
+    void setFocusedDisplay(ui::LogicalDisplayId displayId) override;
     void setMinTimeBetweenUserActivityPokes(std::chrono::milliseconds interval) override;
     void setInputDispatchMode(bool enabled, bool frozen) override;
     void setInputFilterEnabled(bool enabled) override;
     bool setInTouchMode(bool inTouchMode, gui::Pid pid, gui::Uid uid, bool hasPermission,
-                        int32_t displayId) override;
+                        ui::LogicalDisplayId displayId) override;
     void setMaximumObscuringOpacityForTouch(float opacity) override;
 
     bool transferTouchGesture(const sp<IBinder>& fromToken, const sp<IBinder>& toToken,
                               bool isDragDrop = false) override;
-    bool transferTouchOnDisplay(const sp<IBinder>& destChannelToken, int32_t displayId) override;
+    bool transferTouchOnDisplay(const sp<IBinder>& destChannelToken,
+                                ui::LogicalDisplayId displayId) override;
 
     base::Result<std::unique_ptr<InputChannel>> createInputChannel(
             const std::string& name) override;
     void setFocusedWindow(const android::gui::FocusRequest&) override;
-    base::Result<std::unique_ptr<InputChannel>> createInputMonitor(int32_t displayId,
+    base::Result<std::unique_ptr<InputChannel>> createInputMonitor(ui::LogicalDisplayId displayId,
                                                                    const std::string& name,
                                                                    gui::Pid pid) override;
     status_t removeInputChannel(const sp<IBinder>& connectionToken) override;
     status_t pilferPointers(const sp<IBinder>& token) override;
     void requestPointerCapture(const sp<IBinder>& windowToken, bool enabled) override;
     bool flushSensor(int deviceId, InputDeviceSensorType sensorType) override;
-    void setDisplayEligibilityForPointerCapture(int displayId, bool isEligible) override;
+    void setDisplayEligibilityForPointerCapture(ui::LogicalDisplayId displayId,
+                                                bool isEligible) override;
 
     std::array<uint8_t, 32> sign(const VerifiedInputEvent& event) const;
 
-    void displayRemoved(int32_t displayId) override;
+    void displayRemoved(ui::LogicalDisplayId displayId) override;
 
     // Public because it's also used by tests to simulate the WindowInfosListener callback
     void onWindowInfosChanged(const gui::WindowInfosUpdate&);
@@ -155,8 +157,8 @@
     void setKeyRepeatConfiguration(std::chrono::nanoseconds timeout,
                                    std::chrono::nanoseconds delay) override;
 
-    bool isPointerInWindow(const sp<IBinder>& token, int32_t displayId, DeviceId deviceId,
-                           int32_t pointerId) override;
+    bool isPointerInWindow(const sp<IBinder>& token, ui::LogicalDisplayId displayId,
+                           DeviceId deviceId, int32_t pointerId) override;
 
     void setInputMethodConnectionIsActive(bool isActive) override;
 
@@ -249,17 +251,17 @@
     std::shared_ptr<const EventEntry> mNextUnblockedEvent GUARDED_BY(mLock);
 
     sp<android::gui::WindowInfoHandle> findTouchedWindowAtLocked(
-            int32_t displayId, float x, float y, bool isStylus = false,
+            ui::LogicalDisplayId displayId, float x, float y, bool isStylus = false,
             bool ignoreDragWindow = false) const REQUIRES(mLock);
     std::vector<InputTarget> findOutsideTargetsLocked(
-            int32_t displayId, const sp<android::gui::WindowInfoHandle>& touchedWindow,
+            ui::LogicalDisplayId displayId, const sp<android::gui::WindowInfoHandle>& touchedWindow,
             int32_t pointerId) const REQUIRES(mLock);
 
     std::vector<sp<android::gui::WindowInfoHandle>> findTouchedSpyWindowsAtLocked(
-            int32_t displayId, float x, float y, bool isStylus) const REQUIRES(mLock);
+            ui::LogicalDisplayId displayId, float x, float y, bool isStylus) const REQUIRES(mLock);
 
-    sp<android::gui::WindowInfoHandle> findTouchedForegroundWindowLocked(int32_t displayId) const
-            REQUIRES(mLock);
+    sp<android::gui::WindowInfoHandle> findTouchedForegroundWindowLocked(
+            ui::LogicalDisplayId displayId) const REQUIRES(mLock);
 
     std::shared_ptr<Connection> getConnectionLocked(const sp<IBinder>& inputConnectionToken) const
             REQUIRES(mLock);
@@ -283,7 +285,8 @@
     std::optional<gui::Pid> findMonitorPidByTokenLocked(const sp<IBinder>& token) REQUIRES(mLock);
 
     // Input channels that will receive a copy of all input events sent to the provided display.
-    std::unordered_map<int32_t, std::vector<Monitor>> mGlobalMonitorsByDisplay GUARDED_BY(mLock);
+    std::unordered_map<ui::LogicalDisplayId, std::vector<Monitor>> mGlobalMonitorsByDisplay
+            GUARDED_BY(mLock);
 
     const HmacKeyManager mHmacKeyManager;
     const std::array<uint8_t, 32> getSignature(const MotionEntry& motionEntry,
@@ -342,7 +345,8 @@
     // This map is not really needed, but it helps a lot with debugging (dumpsys input).
     // In the java layer, touch mode states are spread across multiple DisplayContent objects,
     // making harder to snapshot and retrieve them.
-    std::map<int32_t /*displayId*/, bool /*inTouchMode*/> mTouchModePerDisplay GUARDED_BY(mLock);
+    std::map<ui::LogicalDisplayId /*displayId*/, bool /*inTouchMode*/> mTouchModePerDisplay
+            GUARDED_BY(mLock);
 
     class DispatcherWindowListener : public gui::WindowInfosListener {
     public:
@@ -354,25 +358,26 @@
     };
     sp<gui::WindowInfosListener> mWindowInfoListener;
 
-    std::unordered_map<int32_t /*displayId*/, std::vector<sp<android::gui::WindowInfoHandle>>>
+    std::unordered_map<ui::LogicalDisplayId /*displayId*/,
+                       std::vector<sp<android::gui::WindowInfoHandle>>>
             mWindowHandlesByDisplay GUARDED_BY(mLock);
-    std::unordered_map<int32_t /*displayId*/, android::gui::DisplayInfo> mDisplayInfos
+    std::unordered_map<ui::LogicalDisplayId /*displayId*/, android::gui::DisplayInfo> mDisplayInfos
             GUARDED_BY(mLock);
     void setInputWindowsLocked(
             const std::vector<sp<android::gui::WindowInfoHandle>>& inputWindowHandles,
-            int32_t displayId) REQUIRES(mLock);
+            ui::LogicalDisplayId displayId) REQUIRES(mLock);
     // Get a reference to window handles by display, return an empty vector if not found.
     const std::vector<sp<android::gui::WindowInfoHandle>>& getWindowHandlesLocked(
-            int32_t displayId) const REQUIRES(mLock);
-    ui::Transform getTransformLocked(int32_t displayId) const REQUIRES(mLock);
+            ui::LogicalDisplayId displayId) const REQUIRES(mLock);
+    ui::Transform getTransformLocked(ui::LogicalDisplayId displayId) const REQUIRES(mLock);
 
     sp<android::gui::WindowInfoHandle> getWindowHandleLocked(
-            const sp<IBinder>& windowHandleToken, std::optional<int32_t> displayId = {}) const
-            REQUIRES(mLock);
+            const sp<IBinder>& windowHandleToken,
+            std::optional<ui::LogicalDisplayId> displayId = {}) const REQUIRES(mLock);
     sp<android::gui::WindowInfoHandle> getWindowHandleLocked(
             const sp<android::gui::WindowInfoHandle>& windowHandle) const REQUIRES(mLock);
-    sp<android::gui::WindowInfoHandle> getFocusedWindowHandleLocked(int displayId) const
-            REQUIRES(mLock);
+    sp<android::gui::WindowInfoHandle> getFocusedWindowHandleLocked(
+            ui::LogicalDisplayId displayId) const REQUIRES(mLock);
     bool canWindowReceiveMotionLocked(const sp<android::gui::WindowInfoHandle>& window,
                                       const MotionEntry& motionEntry) const REQUIRES(mLock);
 
@@ -387,20 +392,21 @@
      */
     void updateWindowHandlesForDisplayLocked(
             const std::vector<sp<android::gui::WindowInfoHandle>>& inputWindowHandles,
-            int32_t displayId) REQUIRES(mLock);
+            ui::LogicalDisplayId displayId) REQUIRES(mLock);
 
-    std::unordered_map<int32_t, TouchState> mTouchStatesByDisplay GUARDED_BY(mLock);
+    std::unordered_map<ui::LogicalDisplayId /*displayId*/, TouchState> mTouchStatesByDisplay
+            GUARDED_BY(mLock);
     std::unique_ptr<DragState> mDragState GUARDED_BY(mLock);
 
     void setFocusedApplicationLocked(
-            int32_t displayId,
+            ui::LogicalDisplayId displayId,
             const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) REQUIRES(mLock);
     // Focused applications.
-    std::unordered_map<int32_t, std::shared_ptr<InputApplicationHandle>>
+    std::unordered_map<ui::LogicalDisplayId /*displayId*/, std::shared_ptr<InputApplicationHandle>>
             mFocusedApplicationHandlesByDisplay GUARDED_BY(mLock);
 
     // Top focused display.
-    int32_t mFocusedDisplayId GUARDED_BY(mLock);
+    ui::LogicalDisplayId mFocusedDisplayId GUARDED_BY(mLock);
 
     // Keeps track of the focused window per display and determines focus changes.
     FocusResolver mFocusResolver GUARDED_BY(mLock);
@@ -417,7 +423,8 @@
 
     // Displays that are ineligible for pointer capture.
     // TODO(b/214621487): Remove or move to a display flag.
-    std::vector<int32_t> mIneligibleDisplaysForPointerCapture GUARDED_BY(mLock);
+    std::vector<ui::LogicalDisplayId /*displayId*/> mIneligibleDisplaysForPointerCapture
+            GUARDED_BY(mLock);
 
     // Disable Pointer Capture as a result of loss of window focus.
     void disablePointerCaptureForcedLocked() REQUIRES(mLock);
@@ -492,7 +499,7 @@
     /**
      * The displayId that the focused application is associated with.
      */
-    int32_t mAwaitedApplicationDisplayId GUARDED_BY(mLock);
+    ui::LogicalDisplayId mAwaitedApplicationDisplayId GUARDED_BY(mLock);
     void processNoFocusedWindowAnrLocked() REQUIRES(mLock);
 
     /**
@@ -526,7 +533,7 @@
     // shade is pulled down while we are counting down the timeout).
     void resetNoFocusedWindowTimeoutLocked() REQUIRES(mLock);
 
-    int32_t getTargetDisplayId(const EventEntry& entry);
+    ui::LogicalDisplayId getTargetDisplayId(const EventEntry& entry);
     sp<android::gui::WindowInfoHandle> findFocusedWindowTargetLocked(
             nsecs_t currentTime, const EventEntry& entry, nsecs_t& nextWakeupTime,
             android::os::InputEventInjectionResult& outInjectionResult) REQUIRES(mLock);
@@ -551,13 +558,13 @@
                                       std::bitset<MAX_POINTER_ID + 1> pointerIds,
                                       std::optional<nsecs_t> firstDownTimeInTarget,
                                       std::vector<InputTarget>& inputTargets) const REQUIRES(mLock);
-    void addGlobalMonitoringTargetsLocked(std::vector<InputTarget>& inputTargets, int32_t displayId)
-            REQUIRES(mLock);
+    void addGlobalMonitoringTargetsLocked(std::vector<InputTarget>& inputTargets,
+                                          ui::LogicalDisplayId displayId) REQUIRES(mLock);
     void pokeUserActivityLocked(const EventEntry& eventEntry) REQUIRES(mLock);
     // Enqueue a drag event if needed, and update the touch state.
     // Uses findTouchedWindowTargetsLocked to make the decision
     void addDragEventLocked(const MotionEntry& entry) REQUIRES(mLock);
-    void finishDragAndDrop(int32_t displayId, float x, float y) REQUIRES(mLock);
+    void finishDragAndDrop(ui::LogicalDisplayId displayId, float x, float y) REQUIRES(mLock);
 
     struct TouchOcclusionInfo {
         bool hasBlockingOcclusion;
@@ -675,14 +682,14 @@
                                   const std::string& reason) REQUIRES(mLock);
     void updateLastAnrStateLocked(const std::string& windowLabel, const std::string& reason)
             REQUIRES(mLock);
-    std::map<int32_t /*displayId*/, InputVerifier> mVerifiersByDisplay;
+    std::map<ui::LogicalDisplayId /*displayId*/, InputVerifier> mVerifiersByDisplay;
     // Returns a fallback KeyEntry that should be sent to the connection, if required.
     std::unique_ptr<const KeyEntry> afterKeyEventLockedInterruptable(
             const std::shared_ptr<Connection>& connection, DispatchEntry& dispatchEntry,
             const KeyEntry& keyEntry, bool handled) REQUIRES(mLock);
 
     // Find touched state and touched window by token.
-    std::tuple<TouchState*, TouchedWindow*, int32_t /*displayId*/>
+    std::tuple<TouchState*, TouchedWindow*, ui::LogicalDisplayId /*displayId*/>
     findTouchStateWindowAndDisplayLocked(const sp<IBinder>& token) REQUIRES(mLock);
 
     // Statistics gathering.
diff --git a/services/inputflinger/dispatcher/InputState.cpp b/services/inputflinger/dispatcher/InputState.cpp
index 02bc368..46e7e8b 100644
--- a/services/inputflinger/dispatcher/InputState.cpp
+++ b/services/inputflinger/dispatcher/InputState.cpp
@@ -28,7 +28,8 @@
 
 InputState::~InputState() {}
 
-bool InputState::isHovering(DeviceId deviceId, uint32_t source, int32_t displayId) const {
+bool InputState::isHovering(DeviceId deviceId, uint32_t source,
+                            ui::LogicalDisplayId displayId) const {
     for (const MotionMemento& memento : mMotionMementos) {
         if (memento.deviceId == deviceId && memento.source == source &&
             memento.displayId == displayId && memento.hovering) {
diff --git a/services/inputflinger/dispatcher/InputState.h b/services/inputflinger/dispatcher/InputState.h
index d49469d..ab83ef9 100644
--- a/services/inputflinger/dispatcher/InputState.h
+++ b/services/inputflinger/dispatcher/InputState.h
@@ -36,7 +36,7 @@
 
     // Returns true if the specified source is known to have received a hover enter
     // motion event.
-    bool isHovering(DeviceId deviceId, uint32_t source, int32_t displayId) const;
+    bool isHovering(DeviceId deviceId, uint32_t source, ui::LogicalDisplayId displayId) const;
 
     // Records tracking information for a key event that has just been published.
     // Returns true if the event should be delivered, false if it is inconsistent
@@ -90,7 +90,7 @@
     struct KeyMemento {
         DeviceId deviceId;
         uint32_t source;
-        int32_t displayId;
+        ui::LogicalDisplayId displayId{ui::ADISPLAY_ID_NONE};
         int32_t keyCode;
         int32_t scanCode;
         int32_t metaState;
@@ -102,7 +102,7 @@
     struct MotionMemento {
         DeviceId deviceId;
         uint32_t source;
-        int32_t displayId;
+        ui::LogicalDisplayId displayId{ui::ADISPLAY_ID_NONE};
         int32_t flags;
         float xPrecision;
         float yPrecision;
diff --git a/services/inputflinger/dispatcher/InputTarget.h b/services/inputflinger/dispatcher/InputTarget.h
index 60a75ee..90374f1 100644
--- a/services/inputflinger/dispatcher/InputTarget.h
+++ b/services/inputflinger/dispatcher/InputTarget.h
@@ -18,7 +18,6 @@
 
 #include <ftl/flags.h>
 #include <gui/WindowInfo.h>
-#include <gui/constants.h>
 #include <ui/Transform.h>
 #include <utils/BitSet.h>
 #include <bitset>
diff --git a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
index 6b9262c..653f595 100644
--- a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
+++ b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
@@ -92,14 +92,14 @@
      * This method may be called on any thread (usually by the input manager).
      */
     virtual void setFocusedApplication(
-            int32_t displayId,
+            ui::LogicalDisplayId displayId,
             const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle) = 0;
 
     /* Sets the focused display.
      *
      * This method may be called on any thread (usually by the input manager).
      */
-    virtual void setFocusedDisplay(int32_t displayId) = 0;
+    virtual void setFocusedDisplay(ui::LogicalDisplayId displayId) = 0;
 
     /** Sets the minimum time between user activity pokes. */
     virtual void setMinTimeBetweenUserActivityPokes(std::chrono::milliseconds interval) = 0;
@@ -130,7 +130,7 @@
      * Returns true when changing touch mode state.
      */
     virtual bool setInTouchMode(bool inTouchMode, gui::Pid pid, gui::Uid uid, bool hasPermission,
-                                int32_t displayId) = 0;
+                                ui::LogicalDisplayId displayId) = 0;
 
     /**
      * Sets the maximum allowed obscuring opacity by UID to propagate touches.
@@ -156,7 +156,8 @@
      * Returns true on success, false if there was no on-going touch on the display.
      * @deprecated
      */
-    virtual bool transferTouchOnDisplay(const sp<IBinder>& destChannelToken, int32_t displayId) = 0;
+    virtual bool transferTouchOnDisplay(const sp<IBinder>& destChannelToken,
+                                        ui::LogicalDisplayId displayId) = 0;
 
     /**
      * Sets focus on the specified window.
@@ -179,9 +180,8 @@
      *
      * This method may be called on any thread (usually by the input manager).
      */
-    virtual base::Result<std::unique_ptr<InputChannel>> createInputMonitor(int32_t displayId,
-                                                                           const std::string& name,
-                                                                           gui::Pid pid) = 0;
+    virtual base::Result<std::unique_ptr<InputChannel>> createInputMonitor(
+            ui::LogicalDisplayId displayId, const std::string& name, gui::Pid pid) = 0;
 
     /* Removes input channels that will no longer receive input events.
      *
@@ -207,7 +207,8 @@
      * ineligible, all attempts to request pointer capture for windows on that display will fail.
      *  TODO(b/214621487): Remove or move to a display flag.
      */
-    virtual void setDisplayEligibilityForPointerCapture(int displayId, bool isEligible) = 0;
+    virtual void setDisplayEligibilityForPointerCapture(ui::LogicalDisplayId displayId,
+                                                        bool isEligible) = 0;
 
     /* Flush input device motion sensor.
      *
@@ -218,7 +219,7 @@
     /**
      * Called when a display has been removed from the system.
      */
-    virtual void displayRemoved(int32_t displayId) = 0;
+    virtual void displayRemoved(ui::LogicalDisplayId displayId) = 0;
 
     /*
      * Abort the current touch stream.
@@ -234,8 +235,8 @@
     /*
      * Determine if a pointer from a device is being dispatched to the given window.
      */
-    virtual bool isPointerInWindow(const sp<IBinder>& token, int32_t displayId, DeviceId deviceId,
-                                   int32_t pointerId) = 0;
+    virtual bool isPointerInWindow(const sp<IBinder>& token, ui::LogicalDisplayId displayId,
+                                   DeviceId deviceId, int32_t pointerId) = 0;
 
     /*
      * Notify the dispatcher that the state of the input method connection changed.
diff --git a/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h b/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h
index 62c2b02..0f03620 100644
--- a/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h
+++ b/services/inputflinger/dispatcher/include/InputDispatcherPolicyInterface.h
@@ -99,8 +99,9 @@
      * This method is expected to set the POLICY_FLAG_PASS_TO_USER policy flag if the event
      * should be dispatched to applications.
      */
-    virtual void interceptMotionBeforeQueueing(int32_t displayId, uint32_t source, int32_t action,
-                                               nsecs_t when, uint32_t& policyFlags) = 0;
+    virtual void interceptMotionBeforeQueueing(ui::LogicalDisplayId displayId, uint32_t source,
+                                               int32_t action, nsecs_t when,
+                                               uint32_t& policyFlags) = 0;
 
     /* Allows the policy a chance to intercept a key before dispatching. */
     virtual nsecs_t interceptKeyBeforeDispatching(const sp<IBinder>& token,
@@ -119,7 +120,8 @@
                               uint32_t policyFlags) = 0;
 
     /* Poke user activity for an event dispatched to a window. */
-    virtual void pokeUserActivity(nsecs_t eventTime, int32_t eventType, int32_t displayId) = 0;
+    virtual void pokeUserActivity(nsecs_t eventTime, int32_t eventType,
+                                  ui::LogicalDisplayId displayId) = 0;
 
     /*
      * Return true if the provided event is stale, and false otherwise. Used for determining
diff --git a/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp b/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp
index c431fb7..2d7554c 100644
--- a/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp
+++ b/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp
@@ -47,7 +47,7 @@
     outProto.set_source(event.source);
     outProto.set_action(event.action);
     outProto.set_device_id(event.deviceId);
-    outProto.set_display_id(event.displayId);
+    outProto.set_display_id(event.displayId.val());
     outProto.set_classification(static_cast<int32_t>(event.classification));
     outProto.set_flags(event.flags);
     outProto.set_policy_flags(event.policyFlags);
@@ -88,7 +88,7 @@
     outProto.set_source(event.source);
     outProto.set_action(event.action);
     outProto.set_device_id(event.deviceId);
-    outProto.set_display_id(event.displayId);
+    outProto.set_display_id(event.displayId.val());
     outProto.set_repeat_count(event.repeatCount);
     outProto.set_flags(event.flags);
     outProto.set_policy_flags(event.policyFlags);
diff --git a/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h b/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h
index 2b45e3a..25099c3 100644
--- a/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h
+++ b/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h
@@ -50,7 +50,7 @@
     uint32_t policyFlags;
     int32_t deviceId;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId;
     int32_t action;
     int32_t keyCode;
     int32_t scanCode;
@@ -70,7 +70,7 @@
     uint32_t policyFlags;
     int32_t deviceId;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId;
     int32_t action;
     int32_t actionButton;
     int32_t flags;
diff --git a/services/inputflinger/include/InputReaderBase.h b/services/inputflinger/include/InputReaderBase.h
index 4d8ed99..e5c3aa0 100644
--- a/services/inputflinger/include/InputReaderBase.h
+++ b/services/inputflinger/include/InputReaderBase.h
@@ -125,7 +125,7 @@
     std::unordered_map<std::string, KeyboardLayoutInfo> keyboardLayoutAssociations;
 
     // The suggested display ID to show the cursor.
-    int32_t defaultPointerDisplayId;
+    ui::LogicalDisplayId defaultPointerDisplayId;
 
     // The mouse pointer speed, as a number from -7 (slowest) to 7 (fastest).
     //
@@ -135,7 +135,7 @@
     // Displays on which an acceleration curve shouldn't be applied for pointer movements from mice.
     //
     // Currently only used when the enable_new_mouse_pointer_ballistics flag is enabled.
-    std::set<int32_t> displaysWithMousePointerAccelerationDisabled;
+    std::set<ui::LogicalDisplayId> displaysWithMousePointerAccelerationDisabled;
 
     // Velocity control parameters for mouse pointer movements.
     //
@@ -243,6 +243,7 @@
 
     InputReaderConfiguration()
           : virtualKeyQuietTime(0),
+            defaultPointerDisplayId(ui::ADISPLAY_ID_DEFAULT),
             mousePointerSpeed(0),
             displaysWithMousePointerAccelerationDisabled(),
             pointerVelocityControlParameters(1.0f, 500.0f, 3000.0f,
@@ -275,7 +276,7 @@
     std::optional<DisplayViewport> getDisplayViewportByUniqueId(const std::string& uniqueDisplayId)
             const;
     std::optional<DisplayViewport> getDisplayViewportByPort(uint8_t physicalPort) const;
-    std::optional<DisplayViewport> getDisplayViewportById(int32_t displayId) const;
+    std::optional<DisplayViewport> getDisplayViewportById(ui::LogicalDisplayId displayId) const;
     void setDisplayViewports(const std::vector<DisplayViewport>& viewports);
 
     void dump(std::string& dump) const;
@@ -366,7 +367,7 @@
     virtual std::vector<InputDeviceSensorInfo> getSensors(int32_t deviceId) = 0;
 
     /* Return true if the device can send input events to the specified display. */
-    virtual bool canDispatchToDisplay(int32_t deviceId, int32_t displayId) = 0;
+    virtual bool canDispatchToDisplay(int32_t deviceId, ui::LogicalDisplayId displayId) = 0;
 
     /* Enable sensor in input reader mapper. */
     virtual bool enableSensor(int32_t deviceId, InputDeviceSensorType sensorType,
@@ -471,7 +472,7 @@
      * be used as the range of possible values for pointing devices, like mice and touchpads.
      */
     virtual std::optional<DisplayViewport> getPointerViewportForAssociatedDisplay(
-            int32_t associatedDisplayId = ADISPLAY_ID_NONE) = 0;
+            ui::LogicalDisplayId associatedDisplayId = ui::ADISPLAY_ID_NONE) = 0;
 };
 
 } // namespace android
diff --git a/services/inputflinger/include/NotifyArgs.h b/services/inputflinger/include/NotifyArgs.h
index 736b1e0..865f3d0 100644
--- a/services/inputflinger/include/NotifyArgs.h
+++ b/services/inputflinger/include/NotifyArgs.h
@@ -61,7 +61,7 @@
 
     int32_t deviceId;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId{ui::ADISPLAY_ID_NONE};
     uint32_t policyFlags;
     int32_t action;
     int32_t flags;
@@ -74,9 +74,9 @@
     inline NotifyKeyArgs() {}
 
     NotifyKeyArgs(int32_t id, nsecs_t eventTime, nsecs_t readTime, int32_t deviceId,
-                  uint32_t source, int32_t displayId, uint32_t policyFlags, int32_t action,
-                  int32_t flags, int32_t keyCode, int32_t scanCode, int32_t metaState,
-                  nsecs_t downTime);
+                  uint32_t source, ui::LogicalDisplayId displayId, uint32_t policyFlags,
+                  int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
+                  int32_t metaState, nsecs_t downTime);
 
     bool operator==(const NotifyKeyArgs& rhs) const = default;
 
@@ -91,7 +91,7 @@
 
     int32_t deviceId;
     uint32_t source;
-    int32_t displayId;
+    ui::LogicalDisplayId displayId{ui::ADISPLAY_ID_NONE};
     uint32_t policyFlags;
     int32_t action;
     int32_t actionButton;
@@ -123,12 +123,12 @@
     inline NotifyMotionArgs() {}
 
     NotifyMotionArgs(int32_t id, nsecs_t eventTime, nsecs_t readTime, int32_t deviceId,
-                     uint32_t source, int32_t displayId, uint32_t policyFlags, int32_t action,
-                     int32_t actionButton, int32_t flags, int32_t metaState, int32_t buttonState,
-                     MotionClassification classification, int32_t edgeFlags, uint32_t pointerCount,
-                     const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
-                     float xPrecision, float yPrecision, float xCursorPosition,
-                     float yCursorPosition, nsecs_t downTime,
+                     uint32_t source, ui::LogicalDisplayId displayId, uint32_t policyFlags,
+                     int32_t action, int32_t actionButton, int32_t flags, int32_t metaState,
+                     int32_t buttonState, MotionClassification classification, int32_t edgeFlags,
+                     uint32_t pointerCount, const PointerProperties* pointerProperties,
+                     const PointerCoords* pointerCoords, float xPrecision, float yPrecision,
+                     float xCursorPosition, float yCursorPosition, nsecs_t downTime,
                      const std::vector<TouchVideoFrame>& videoFrames);
 
     NotifyMotionArgs(const NotifyMotionArgs& other) = default;
diff --git a/services/inputflinger/include/NotifyArgsBuilders.h b/services/inputflinger/include/NotifyArgsBuilders.h
index 1bd5595..1ba0cfd 100644
--- a/services/inputflinger/include/NotifyArgsBuilders.h
+++ b/services/inputflinger/include/NotifyArgsBuilders.h
@@ -19,7 +19,6 @@
 #include <NotifyArgs.h>
 #include <android/input.h>
 #include <attestation/HmacKeyManager.h>
-#include <gui/constants.h>
 #include <input/Input.h>
 #include <input/InputEventBuilders.h>
 #include <utils/Timers.h> // for nsecs_t, systemTime
@@ -55,7 +54,7 @@
         return *this;
     }
 
-    MotionArgsBuilder& displayId(int32_t displayId) {
+    MotionArgsBuilder& displayId(ui::LogicalDisplayId displayId) {
         mDisplayId = displayId;
         return *this;
     }
@@ -151,7 +150,7 @@
     uint32_t mSource;
     nsecs_t mDownTime;
     nsecs_t mEventTime;
-    int32_t mDisplayId{ADISPLAY_ID_DEFAULT};
+    ui::LogicalDisplayId mDisplayId{ui::ADISPLAY_ID_DEFAULT};
     uint32_t mPolicyFlags = DEFAULT_POLICY_FLAGS;
     int32_t mActionButton{0};
     int32_t mButtonState{0};
@@ -187,7 +186,7 @@
         return *this;
     }
 
-    KeyArgsBuilder& displayId(int32_t displayId) {
+    KeyArgsBuilder& displayId(ui::LogicalDisplayId displayId) {
         mDisplayId = displayId;
         return *this;
     }
@@ -230,7 +229,7 @@
     uint32_t mSource;
     nsecs_t mDownTime;
     nsecs_t mEventTime;
-    int32_t mDisplayId{ADISPLAY_ID_DEFAULT};
+    ui::LogicalDisplayId mDisplayId{ui::ADISPLAY_ID_DEFAULT};
     uint32_t mPolicyFlags = DEFAULT_POLICY_FLAGS;
     int32_t mFlags{0};
     int32_t mKeyCode{AKEYCODE_UNKNOWN};
diff --git a/services/inputflinger/include/PointerChoreographerPolicyInterface.h b/services/inputflinger/include/PointerChoreographerPolicyInterface.h
index 462aedc..f6dc109 100644
--- a/services/inputflinger/include/PointerChoreographerPolicyInterface.h
+++ b/services/inputflinger/include/PointerChoreographerPolicyInterface.h
@@ -53,7 +53,8 @@
      * @param displayId The updated display on which the mouse cursor is shown
      * @param position The new position of the mouse cursor on the logical display
      */
-    virtual void notifyPointerDisplayIdChanged(int32_t displayId, const FloatPoint& position) = 0;
+    virtual void notifyPointerDisplayIdChanged(ui::LogicalDisplayId displayId,
+                                               const FloatPoint& position) = 0;
 };
 
 } // namespace android
diff --git a/services/inputflinger/include/PointerControllerInterface.h b/services/inputflinger/include/PointerControllerInterface.h
index c1467b3..cee44fc 100644
--- a/services/inputflinger/include/PointerControllerInterface.h
+++ b/services/inputflinger/include/PointerControllerInterface.h
@@ -125,13 +125,13 @@
      * pressed (not hovering).
      */
     virtual void setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
-                          BitSet32 spotIdBits, int32_t displayId) = 0;
+                          BitSet32 spotIdBits, ui::LogicalDisplayId displayId) = 0;
 
     /* Removes all spots. */
     virtual void clearSpots() = 0;
 
     /* Gets the id of the display where the pointer should be shown. */
-    virtual int32_t getDisplayId() const = 0;
+    virtual ui::LogicalDisplayId getDisplayId() const = 0;
 
     /* Sets the associated display of this pointer. Pointer should show on that display. */
     virtual void setDisplayViewport(const DisplayViewport& displayViewport) = 0;
@@ -145,7 +145,7 @@
     /* Sets the flag to skip screenshot of the pointer indicators on the display matching the
      * provided displayId.
      */
-    virtual void setSkipScreenshot(int32_t displayId, bool skip) = 0;
+    virtual void setSkipScreenshot(ui::LogicalDisplayId displayId, bool skip) = 0;
 };
 
 } // namespace android
diff --git a/services/inputflinger/reader/InputDevice.cpp b/services/inputflinger/reader/InputDevice.cpp
index 44dfd15..15586e2 100644
--- a/services/inputflinger/reader/InputDevice.cpp
+++ b/services/inputflinger/reader/InputDevice.cpp
@@ -442,7 +442,7 @@
 InputDeviceInfo InputDevice::getDeviceInfo() {
     InputDeviceInfo outDeviceInfo;
     outDeviceInfo.initialize(mId, mGeneration, mControllerNumber, mIdentifier, mAlias, mIsExternal,
-                             mHasMic, getAssociatedDisplayId().value_or(ADISPLAY_ID_NONE),
+                             mHasMic, getAssociatedDisplayId().value_or(ui::ADISPLAY_ID_NONE),
                              {mShouldSmoothScroll}, isEnabled());
 
     for_each_mapper(
@@ -699,14 +699,14 @@
     return NotifyDeviceResetArgs(mContext->getNextId(), when, mId);
 }
 
-std::optional<int32_t> InputDevice::getAssociatedDisplayId() {
+std::optional<ui::LogicalDisplayId> InputDevice::getAssociatedDisplayId() {
     // Check if we had associated to the specific display.
     if (mAssociatedViewport) {
         return mAssociatedViewport->displayId;
     }
 
     // No associated display port, check if some InputMapper is associated.
-    return first_in_mappers<int32_t>(
+    return first_in_mappers<ui::LogicalDisplayId>(
             [](InputMapper& mapper) { return mapper.getAssociatedDisplayId(); });
 }
 
diff --git a/services/inputflinger/reader/InputReader.cpp b/services/inputflinger/reader/InputReader.cpp
index 903c6ed..12f52b8 100644
--- a/services/inputflinger/reader/InputReader.cpp
+++ b/services/inputflinger/reader/InputReader.cpp
@@ -856,7 +856,7 @@
     return false;
 }
 
-bool InputReader::canDispatchToDisplay(int32_t deviceId, int32_t displayId) {
+bool InputReader::canDispatchToDisplay(int32_t deviceId, ui::LogicalDisplayId displayId) {
     std::scoped_lock _l(mLock);
 
     InputDevice* device = findInputDeviceLocked(deviceId);
@@ -870,10 +870,9 @@
         return false;
     }
 
-    std::optional<int32_t> associatedDisplayId = device->getAssociatedDisplayId();
+    std::optional<ui::LogicalDisplayId> associatedDisplayId = device->getAssociatedDisplayId();
     // No associated display. By default, can dispatch to all displays.
-    if (!associatedDisplayId ||
-            *associatedDisplayId == ADISPLAY_ID_NONE) {
+    if (!associatedDisplayId || !associatedDisplayId->isValid()) {
         return true;
     }
 
diff --git a/services/inputflinger/reader/include/InputDevice.h b/services/inputflinger/reader/include/InputDevice.h
index feb4071..4c9af2e 100644
--- a/services/inputflinger/reader/include/InputDevice.h
+++ b/services/inputflinger/reader/include/InputDevice.h
@@ -131,7 +131,7 @@
     inline const PropertyMap& getConfiguration() { return mConfiguration; }
     inline EventHubInterface* getEventHub() { return mContext->getEventHub(); }
 
-    std::optional<int32_t> getAssociatedDisplayId();
+    std::optional<ui::LogicalDisplayId> getAssociatedDisplayId();
 
     void updateLedState(bool reset);
 
diff --git a/services/inputflinger/reader/include/InputReader.h b/services/inputflinger/reader/include/InputReader.h
index 5f882cf..d9ac917 100644
--- a/services/inputflinger/reader/include/InputReader.h
+++ b/services/inputflinger/reader/include/InputReader.h
@@ -86,7 +86,7 @@
 
     std::vector<int32_t> getVibratorIds(int32_t deviceId) override;
 
-    bool canDispatchToDisplay(int32_t deviceId, int32_t displayId) override;
+    bool canDispatchToDisplay(int32_t deviceId, ui::LogicalDisplayId displayId) override;
 
     bool enableSensor(int32_t deviceId, InputDeviceSensorType sensorType,
                       std::chrono::microseconds samplingPeriod,
diff --git a/services/inputflinger/reader/mapper/CapturedTouchpadEventConverter.cpp b/services/inputflinger/reader/mapper/CapturedTouchpadEventConverter.cpp
index 061c6a3..21dec6f 100644
--- a/services/inputflinger/reader/mapper/CapturedTouchpadEventConverter.cpp
+++ b/services/inputflinger/reader/mapper/CapturedTouchpadEventConverter.cpp
@@ -19,7 +19,6 @@
 #include <sstream>
 
 #include <android-base/stringprintf.h>
-#include <gui/constants.h>
 #include <input/PrintTools.h>
 #include <linux/input-event-codes.h>
 #include <log/log_main.h>
@@ -279,7 +278,7 @@
     LOG_ALWAYS_FATAL_IF(coords.size() != properties.size(),
                         "Mismatched coords and properties arrays.");
     return NotifyMotionArgs(mReaderContext.getNextId(), when, readTime, mDeviceId, SOURCE,
-                            ADISPLAY_ID_NONE, /*policyFlags=*/POLICY_FLAG_WAKE, action,
+                            ui::ADISPLAY_ID_NONE, /*policyFlags=*/POLICY_FLAG_WAKE, action,
                             /*actionButton=*/actionButton, flags,
                             mReaderContext.getGlobalMetaState(), mButtonState,
                             MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, coords.size(),
diff --git a/services/inputflinger/reader/mapper/CursorInputMapper.cpp b/services/inputflinger/reader/mapper/CursorInputMapper.cpp
index ede2d72..d5fe040 100644
--- a/services/inputflinger/reader/mapper/CursorInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/CursorInputMapper.cpp
@@ -129,7 +129,8 @@
                          mWheelXVelocityControl.getParameters().dump().c_str());
     dump += StringPrintf(INDENT3 "VWheelScale: %0.3f\n", mVWheelScale);
     dump += StringPrintf(INDENT3 "HWheelScale: %0.3f\n", mHWheelScale);
-    dump += StringPrintf(INDENT3 "DisplayId: %s\n", toString(mDisplayId).c_str());
+    dump += StringPrintf(INDENT3 "DisplayId: %s\n",
+                         toString(mDisplayId, streamableToString).c_str());
     dump += StringPrintf(INDENT3 "Orientation: %s\n", ftl::enum_string(mOrientation).c_str());
     dump += StringPrintf(INDENT3 "ButtonState: 0x%08x\n", mButtonState);
     dump += StringPrintf(INDENT3 "Down: %s\n", toString(isPointerDown(mButtonState)));
@@ -417,7 +418,7 @@
     }
 }
 
-std::optional<int32_t> CursorInputMapper::getAssociatedDisplayId() {
+std::optional<ui::LogicalDisplayId> CursorInputMapper::getAssociatedDisplayId() {
     return mDisplayId;
 }
 
@@ -487,13 +488,13 @@
         if (mEnableNewMousePointerBallistics) {
             mNewPointerVelocityControl.setAccelerationEnabled(
                     config.displaysWithMousePointerAccelerationDisabled.count(
-                            mDisplayId.value_or(ADISPLAY_ID_NONE)) == 0);
+                            mDisplayId.value_or(ui::ADISPLAY_ID_NONE)) == 0);
             mNewPointerVelocityControl.setCurve(
                     createAccelerationCurveForPointerSensitivity(config.mousePointerSpeed));
         } else {
             mOldPointerVelocityControl.setParameters(
                     (config.displaysWithMousePointerAccelerationDisabled.count(
-                             mDisplayId.value_or(ADISPLAY_ID_NONE)) == 0)
+                             mDisplayId.value_or(ui::ADISPLAY_ID_NONE)) == 0)
                             ? config.pointerVelocityControlParameters
                             : FLAT_VELOCITY_CONTROL_PARAMS);
         }
@@ -505,7 +506,7 @@
 void CursorInputMapper::configureOnChangeDisplayInfo(const InputReaderConfiguration& config) {
     const bool isPointer = mParameters.mode == Parameters::Mode::POINTER;
 
-    mDisplayId = ADISPLAY_ID_NONE;
+    mDisplayId = ui::ADISPLAY_ID_NONE;
     std::optional<DisplayViewport> resolvedViewport;
     if (auto assocViewport = mDeviceContext.getAssociatedViewport(); assocViewport) {
         // This InputDevice is associated with a viewport.
@@ -517,7 +518,7 @@
         // Always use DISPLAY_ID_NONE for mouse events.
         // PointerChoreographer will make it target the correct the displayId later.
         resolvedViewport = getContext()->getPolicy()->getPointerViewportForAssociatedDisplay();
-        mDisplayId = resolvedViewport ? std::make_optional(ADISPLAY_ID_NONE) : std::nullopt;
+        mDisplayId = resolvedViewport ? std::make_optional(ui::ADISPLAY_ID_NONE) : std::nullopt;
     }
 
     mOrientation = (mParameters.orientationAware && mParameters.hasAssociatedDisplay) ||
diff --git a/services/inputflinger/reader/mapper/CursorInputMapper.h b/services/inputflinger/reader/mapper/CursorInputMapper.h
index 3daae2f..e45105a 100644
--- a/services/inputflinger/reader/mapper/CursorInputMapper.h
+++ b/services/inputflinger/reader/mapper/CursorInputMapper.h
@@ -66,7 +66,7 @@
 
     virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode) override;
 
-    virtual std::optional<int32_t> getAssociatedDisplayId() override;
+    virtual std::optional<ui::LogicalDisplayId> getAssociatedDisplayId() override;
 
 private:
     // Amount that trackball needs to move in order to generate a key event.
@@ -115,7 +115,7 @@
     // The display that events generated by this mapper should target. This can be set to
     // ADISPLAY_ID_NONE to target the focused display. If there is no display target (i.e.
     // std::nullopt), all events will be ignored.
-    std::optional<int32_t> mDisplayId;
+    std::optional<ui::LogicalDisplayId> mDisplayId;
     ui::Rotation mOrientation{ui::ROTATION_0};
     FloatRect mBoundsInLogicalDisplay{};
 
diff --git a/services/inputflinger/reader/mapper/InputMapper.h b/services/inputflinger/reader/mapper/InputMapper.h
index 06de4c2..c7eea0e 100644
--- a/services/inputflinger/reader/mapper/InputMapper.h
+++ b/services/inputflinger/reader/mapper/InputMapper.h
@@ -117,7 +117,7 @@
 
     [[nodiscard]] virtual std::list<NotifyArgs> updateExternalStylusState(const StylusState& state);
 
-    virtual std::optional<int32_t> getAssociatedDisplayId() { return std::nullopt; }
+    virtual std::optional<ui::LogicalDisplayId> getAssociatedDisplayId() { return std::nullopt; }
     virtual void updateLedState(bool reset) {}
 
 protected:
diff --git a/services/inputflinger/reader/mapper/JoystickInputMapper.cpp b/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
index 8a9ea75..7fcff95 100644
--- a/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
@@ -341,7 +341,7 @@
     // button will likely wake the device.
     // TODO: Use the input device configuration to control this behavior more finely.
     uint32_t policyFlags = 0;
-    int32_t displayId = ADISPLAY_ID_NONE;
+    ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE;
     if (getDeviceContext().getAssociatedViewport()) {
         displayId = getDeviceContext().getAssociatedViewport()->displayId;
     }
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
index 658ceab..be8d183 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
@@ -110,11 +110,11 @@
     return ui::ROTATION_0;
 }
 
-int32_t KeyboardInputMapper::getDisplayId() {
+ui::LogicalDisplayId KeyboardInputMapper::getDisplayId() {
     if (mViewport) {
         return mViewport->displayId;
     }
-    return ADISPLAY_ID_NONE;
+    return ui::ADISPLAY_ID_NONE;
 }
 
 std::optional<KeyboardLayoutInfo> KeyboardInputMapper::getKeyboardLayoutInfo() const {
@@ -457,7 +457,7 @@
     }
 }
 
-std::optional<int32_t> KeyboardInputMapper::getAssociatedDisplayId() {
+std::optional<ui::LogicalDisplayId> KeyboardInputMapper::getAssociatedDisplayId() {
     if (mViewport) {
         return std::make_optional(mViewport->displayId);
     }
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.h b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
index 500256b..f2d3f4d 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.h
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
@@ -46,7 +46,7 @@
 
     int32_t getMetaState() override;
     bool updateMetaState(int32_t keyCode) override;
-    std::optional<int32_t> getAssociatedDisplayId() override;
+    std::optional<ui::LogicalDisplayId> getAssociatedDisplayId() override;
     void updateLedState(bool reset) override;
 
 private:
@@ -91,7 +91,7 @@
     void dumpParameters(std::string& dump) const;
 
     ui::Rotation getOrientation();
-    int32_t getDisplayId();
+    ui::LogicalDisplayId getDisplayId();
 
     [[nodiscard]] std::list<NotifyArgs> processKey(nsecs_t when, nsecs_t readTime, bool down,
                                                    int32_t scanCode, int32_t usageCode);
diff --git a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
index 07ae5b1..a3206c2 100644
--- a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
@@ -125,7 +125,7 @@
     if (scrolled) {
         int32_t metaState = getContext()->getGlobalMetaState();
         // This is not a pointer, so it's not associated with a display.
-        int32_t displayId = ADISPLAY_ID_NONE;
+        ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE;
 
         if (mOrientation == ui::ROTATION_180) {
             scroll = -scroll;
diff --git a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp
index c12e95d..d60dc55 100644
--- a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp
+++ b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.cpp
@@ -28,7 +28,7 @@
 
 [[nodiscard]] std::list<NotifyArgs> synthesizeButtonKey(
         InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
-        int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
+        int32_t deviceId, uint32_t source, ui::LogicalDisplayId displayId, uint32_t policyFlags,
         int32_t lastButtonState, int32_t currentButtonState, int32_t buttonState, int32_t keyCode) {
     std::list<NotifyArgs> out;
     if ((action == AKEY_EVENT_ACTION_DOWN && !(lastButtonState & buttonState) &&
@@ -88,7 +88,7 @@
 
 [[nodiscard]] std::list<NotifyArgs> synthesizeButtonKeys(
         InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
-        int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
+        int32_t deviceId, uint32_t source, ui::LogicalDisplayId displayId, uint32_t policyFlags,
         int32_t lastButtonState, int32_t currentButtonState) {
     std::list<NotifyArgs> out;
     out += synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId,
diff --git a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
index 3023e68..13d952b 100644
--- a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
+++ b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
@@ -36,7 +36,7 @@
 
 [[nodiscard]] std::list<NotifyArgs> synthesizeButtonKeys(
         InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
-        int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
+        int32_t deviceId, uint32_t source, ui::LogicalDisplayId displayId, uint32_t policyFlags,
         int32_t lastButtonState, int32_t currentButtonState);
 
 // For devices connected over Bluetooth, although they may produce events at a consistent rate,
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.cpp b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
index cf07506..489bea8 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
@@ -555,8 +555,8 @@
             if (viewport) {
                 return viewport;
             } else {
-                ALOGW("Can't find designated display viewport with ID %" PRId32 " for pointers.",
-                      mConfig.defaultPointerDisplayId);
+                ALOGW("Can't find designated display viewport with ID %s for pointers.",
+                      mConfig.defaultPointerDisplayId.toString().c_str());
             }
         }
 
@@ -1043,10 +1043,10 @@
 
     if ((viewportChanged && !skipViewportUpdate) || deviceModeChanged) {
         ALOGI("Device reconfigured: id=%d, name='%s', size %s, orientation %s, mode %s, "
-              "display id %d",
+              "display id %s",
               getDeviceId(), getDeviceName().c_str(), toString(mDisplayBounds).c_str(),
               ftl::enum_string(mInputDeviceOrientation).c_str(),
-              ftl::enum_string(mDeviceMode).c_str(), mViewport.displayId);
+              ftl::enum_string(mDeviceMode).c_str(), mViewport.displayId.toString().c_str());
 
         configureVirtualKeys();
 
@@ -2646,7 +2646,7 @@
         PointerCoords pointerCoords;
         pointerCoords.clear();
         out.push_back(NotifyMotionArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
-                                       mSource, ADISPLAY_ID_NONE, policyFlags,
+                                       mSource, ui::ADISPLAY_ID_NONE, policyFlags,
                                        AMOTION_EVENT_ACTION_HOVER_MOVE, 0, flags, metaState,
                                        buttonState, MotionClassification::NONE,
                                        AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
@@ -3477,7 +3477,7 @@
         hovering = false;
     }
 
-    return dispatchPointerSimple(when, readTime, policyFlags, down, hovering, ADISPLAY_ID_NONE);
+    return dispatchPointerSimple(when, readTime, policyFlags, down, hovering, ui::ADISPLAY_ID_NONE);
 }
 
 std::list<NotifyArgs> TouchInputMapper::abortPointerMouse(nsecs_t when, nsecs_t readTime,
@@ -3491,7 +3491,8 @@
 
 std::list<NotifyArgs> TouchInputMapper::dispatchPointerSimple(nsecs_t when, nsecs_t readTime,
                                                               uint32_t policyFlags, bool down,
-                                                              bool hovering, int32_t displayId) {
+                                                              bool hovering,
+                                                              ui::LogicalDisplayId displayId) {
     LOG_ALWAYS_FATAL_IF(mDeviceMode != DeviceMode::POINTER,
                         "%s cannot be used when the device is not in POINTER mode.", __func__);
     std::list<NotifyArgs> out;
@@ -3683,14 +3684,14 @@
         source |= AINPUT_SOURCE_BLUETOOTH_STYLUS;
     }
 
-    const int32_t displayId = getAssociatedDisplayId().value_or(ADISPLAY_ID_NONE);
+    const ui::LogicalDisplayId displayId = getAssociatedDisplayId().value_or(ui::ADISPLAY_ID_NONE);
 
     float xCursorPosition = AMOTION_EVENT_INVALID_CURSOR_POSITION;
     float yCursorPosition = AMOTION_EVENT_INVALID_CURSOR_POSITION;
     if (mDeviceMode == DeviceMode::POINTER) {
         xCursorPosition = yCursorPosition = 0.f;
     }
-    const int32_t deviceId = getDeviceId();
+    const DeviceId deviceId = getDeviceId();
     std::vector<TouchVideoFrame> frames = getDeviceContext().getVideoFrames();
     std::for_each(frames.begin(), frames.end(),
                   [this](TouchVideoFrame& frame) { frame.rotate(this->mInputDeviceOrientation); });
@@ -3957,10 +3958,10 @@
     return true;
 }
 
-std::optional<int32_t> TouchInputMapper::getAssociatedDisplayId() {
+std::optional<ui::LogicalDisplayId> TouchInputMapper::getAssociatedDisplayId() {
     if (mParameters.hasAssociatedDisplay) {
         if (mDeviceMode == DeviceMode::POINTER) {
-            return ADISPLAY_ID_NONE;
+            return ui::ADISPLAY_ID_NONE;
         } else {
             return std::make_optional(mViewport.displayId);
         }
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.h b/services/inputflinger/reader/mapper/TouchInputMapper.h
index 6485ab2..0c9ffa2 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.h
@@ -26,13 +26,12 @@
 #include <utility>
 #include <vector>
 
-#include <stdint.h>
-#include <gui/constants.h>
 #include <input/DisplayViewport.h>
 #include <input/Input.h>
 #include <input/InputDevice.h>
 #include <input/VelocityControl.h>
 #include <input/VelocityTracker.h>
+#include <stdint.h>
 #include <ui/Rect.h>
 #include <ui/Rotation.h>
 #include <ui/Size.h>
@@ -186,7 +185,7 @@
     [[nodiscard]] std::list<NotifyArgs> timeoutExpired(nsecs_t when) override;
     [[nodiscard]] std::list<NotifyArgs> updateExternalStylusState(
             const StylusState& state) override;
-    std::optional<int32_t> getAssociatedDisplayId() override;
+    std::optional<ui::LogicalDisplayId> getAssociatedDisplayId() override;
 
 protected:
     CursorButtonAccumulator mCursorButtonAccumulator;
@@ -706,7 +705,7 @@
 
         // Values reported for the last pointer event.
         uint32_t source;
-        int32_t displayId;
+        ui::LogicalDisplayId displayId{ui::ADISPLAY_ID_NONE};
         float lastCursorX;
         float lastCursorY;
 
@@ -719,7 +718,7 @@
             hovering = false;
             downTime = 0;
             source = 0;
-            displayId = ADISPLAY_ID_NONE;
+            displayId = ui::ADISPLAY_ID_NONE;
             lastCursorX = 0.f;
             lastCursorY = 0.f;
         }
@@ -810,7 +809,8 @@
 
     [[nodiscard]] std::list<NotifyArgs> dispatchPointerSimple(nsecs_t when, nsecs_t readTime,
                                                               uint32_t policyFlags, bool down,
-                                                              bool hovering, int32_t displayId);
+                                                              bool hovering,
+                                                              ui::LogicalDisplayId displayId);
     [[nodiscard]] std::list<NotifyArgs> abortPointerSimple(nsecs_t when, nsecs_t readTime,
                                                            uint32_t policyFlags);
 
diff --git a/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp b/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
index 6a38aa7..e157862 100644
--- a/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
@@ -309,7 +309,8 @@
     }
     dump += INDENT3 "Captured event converter:\n";
     dump += addLinePrefix(mCapturedEventConverter.dump(), INDENT4);
-    dump += StringPrintf(INDENT3 "DisplayId: %s\n", toString(mDisplayId).c_str());
+    dump += StringPrintf(INDENT3 "DisplayId: %s\n",
+                         toString(mDisplayId, streamableToString).c_str());
 }
 
 std::list<NotifyArgs> TouchpadInputMapper::reconfigure(nsecs_t when,
@@ -321,7 +322,7 @@
     }
 
     if (!changes.any() || changes.test(InputReaderConfiguration::Change::DISPLAY_INFO)) {
-        mDisplayId = ADISPLAY_ID_NONE;
+        mDisplayId = ui::ADISPLAY_ID_NONE;
         std::optional<DisplayViewport> resolvedViewport;
         std::optional<FloatRect> boundsInLogicalDisplay;
         if (auto assocViewport = mDeviceContext.getAssociatedViewport(); assocViewport) {
@@ -334,7 +335,7 @@
             // Always use DISPLAY_ID_NONE for touchpad events.
             // PointerChoreographer will make it target the correct the displayId later.
             resolvedViewport = getContext()->getPolicy()->getPointerViewportForAssociatedDisplay();
-            mDisplayId = resolvedViewport ? std::make_optional(ADISPLAY_ID_NONE) : std::nullopt;
+            mDisplayId = resolvedViewport ? std::make_optional(ui::ADISPLAY_ID_NONE) : std::nullopt;
         }
 
         mGestureConverter.setDisplayId(mDisplayId);
@@ -497,7 +498,7 @@
     return out;
 }
 
-std::optional<int32_t> TouchpadInputMapper::getAssociatedDisplayId() {
+std::optional<ui::LogicalDisplayId> TouchpadInputMapper::getAssociatedDisplayId() {
     return mDisplayId;
 }
 
diff --git a/services/inputflinger/reader/mapper/TouchpadInputMapper.h b/services/inputflinger/reader/mapper/TouchpadInputMapper.h
index 9f685ec..f27895f 100644
--- a/services/inputflinger/reader/mapper/TouchpadInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchpadInputMapper.h
@@ -66,7 +66,7 @@
     using MetricsIdentifier = std::tuple<uint16_t /*busId*/, uint16_t /*vendorId*/,
                                          uint16_t /*productId*/, uint16_t /*version*/>;
 
-    std::optional<int32_t> getAssociatedDisplayId() override;
+    std::optional<ui::LogicalDisplayId> getAssociatedDisplayId() override;
 
 private:
     void resetGestureInterpreter(nsecs_t when);
@@ -109,7 +109,7 @@
     // The display that events generated by this mapper should target. This can be set to
     // ADISPLAY_ID_NONE to target the focused display. If there is no display target (i.e.
     // std::nullopt), all events will be ignored.
-    std::optional<int32_t> mDisplayId;
+    std::optional<ui::LogicalDisplayId> mDisplayId;
 
     nsecs_t mGestureStartTime{0};
 };
diff --git a/services/inputflinger/reader/mapper/gestures/GestureConverter.h b/services/inputflinger/reader/mapper/gestures/GestureConverter.h
index e6ced0f..829fb92 100644
--- a/services/inputflinger/reader/mapper/gestures/GestureConverter.h
+++ b/services/inputflinger/reader/mapper/gestures/GestureConverter.h
@@ -51,7 +51,7 @@
     void setOrientation(ui::Rotation orientation) { mOrientation = orientation; }
     [[nodiscard]] std::list<NotifyArgs> reset(nsecs_t when);
 
-    void setDisplayId(std::optional<int32_t> displayId) { mDisplayId = displayId; }
+    void setDisplayId(std::optional<ui::LogicalDisplayId> displayId) { mDisplayId = displayId; }
 
     void setBoundsInLogicalDisplay(FloatRect bounds) { mBoundsInLogicalDisplay = bounds; }
 
@@ -100,7 +100,7 @@
     InputReaderContext& mReaderContext;
     const bool mEnableFlingStop;
 
-    std::optional<int32_t> mDisplayId;
+    std::optional<ui::LogicalDisplayId> mDisplayId;
     FloatRect mBoundsInLogicalDisplay{};
     ui::Rotation mOrientation = ui::ROTATION_0;
     RawAbsoluteAxisInfo mXAxisInfo;
diff --git a/services/inputflinger/tests/CursorInputMapper_test.cpp b/services/inputflinger/tests/CursorInputMapper_test.cpp
index c237fb6..72b5573 100644
--- a/services/inputflinger/tests/CursorInputMapper_test.cpp
+++ b/services/inputflinger/tests/CursorInputMapper_test.cpp
@@ -50,8 +50,8 @@
 constexpr auto BUTTON_RELEASE = AMOTION_EVENT_ACTION_BUTTON_RELEASE;
 constexpr auto HOVER_MOVE = AMOTION_EVENT_ACTION_HOVER_MOVE;
 constexpr auto INVALID_CURSOR_POSITION = AMOTION_EVENT_INVALID_CURSOR_POSITION;
-constexpr int32_t DISPLAY_ID = 0;
-constexpr int32_t SECONDARY_DISPLAY_ID = DISPLAY_ID + 1;
+constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
+constexpr ui::LogicalDisplayId SECONDARY_DISPLAY_ID = ui::LogicalDisplayId{DISPLAY_ID.val() + 1};
 constexpr int32_t DISPLAY_WIDTH = 480;
 constexpr int32_t DISPLAY_HEIGHT = 800;
 
@@ -909,7 +909,7 @@
     EXPECT_THAT(args,
                 ElementsAre(VariantWith<NotifyMotionArgs>(
                         AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE),
-                              WithSource(AINPUT_SOURCE_MOUSE), WithDisplayId(ADISPLAY_ID_NONE),
+                              WithSource(AINPUT_SOURCE_MOUSE), WithDisplayId(ui::ADISPLAY_ID_NONE),
                               WithCoords(0.0f, 0.0f)))));
 }
 
diff --git a/services/inputflinger/tests/FakeInputDispatcherPolicy.cpp b/services/inputflinger/tests/FakeInputDispatcherPolicy.cpp
index 36491ab..530416c 100644
--- a/services/inputflinger/tests/FakeInputDispatcherPolicy.cpp
+++ b/services/inputflinger/tests/FakeInputDispatcherPolicy.cpp
@@ -396,8 +396,8 @@
     }
 }
 
-void FakeInputDispatcherPolicy::interceptMotionBeforeQueueing(int32_t, uint32_t, int32_t, nsecs_t,
-                                                              uint32_t&) {}
+void FakeInputDispatcherPolicy::interceptMotionBeforeQueueing(ui::LogicalDisplayId, uint32_t,
+                                                              int32_t, nsecs_t, uint32_t&) {}
 
 nsecs_t FakeInputDispatcherPolicy::interceptKeyBeforeDispatching(const sp<IBinder>&,
                                                                  const KeyEvent&, uint32_t) {
@@ -426,7 +426,7 @@
 }
 
 void FakeInputDispatcherPolicy::pokeUserActivity(nsecs_t eventTime, int32_t eventType,
-                                                 int32_t displayId) {
+                                                 ui::LogicalDisplayId displayId) {
     std::scoped_lock lock(mLock);
     mNotifyUserActivity.notify_all();
     mUserActivityPokeEvents.push({eventTime, eventType, displayId});
diff --git a/services/inputflinger/tests/FakeInputDispatcherPolicy.h b/services/inputflinger/tests/FakeInputDispatcherPolicy.h
index 25d3d3c..2c86146 100644
--- a/services/inputflinger/tests/FakeInputDispatcherPolicy.h
+++ b/services/inputflinger/tests/FakeInputDispatcherPolicy.h
@@ -53,7 +53,7 @@
     struct UserActivityPokeEvent {
         nsecs_t eventTime;
         int32_t eventType;
-        int32_t displayId;
+        ui::LogicalDisplayId displayId;
 
         bool operator==(const UserActivityPokeEvent& rhs) const = default;
         inline friend std::ostream& operator<<(std::ostream& os, const UserActivityPokeEvent& ev) {
@@ -183,13 +183,15 @@
     void notifyVibratorState(int32_t deviceId, bool isOn) override;
     bool filterInputEvent(const InputEvent& inputEvent, uint32_t policyFlags) override;
     void interceptKeyBeforeQueueing(const KeyEvent& inputEvent, uint32_t&) override;
-    void interceptMotionBeforeQueueing(int32_t, uint32_t, int32_t, nsecs_t, uint32_t&) override;
+    void interceptMotionBeforeQueueing(ui::LogicalDisplayId, uint32_t, int32_t, nsecs_t,
+                                       uint32_t&) override;
     nsecs_t interceptKeyBeforeDispatching(const sp<IBinder>&, const KeyEvent&, uint32_t) override;
     std::optional<KeyEvent> dispatchUnhandledKey(const sp<IBinder>&, const KeyEvent& event,
                                                  uint32_t) override;
     void notifySwitch(nsecs_t when, uint32_t switchValues, uint32_t switchMask,
                       uint32_t policyFlags) override;
-    void pokeUserActivity(nsecs_t eventTime, int32_t eventType, int32_t displayId) override;
+    void pokeUserActivity(nsecs_t eventTime, int32_t eventType,
+                          ui::LogicalDisplayId displayId) override;
     bool isStaleEvent(nsecs_t currentTime, nsecs_t eventTime) override;
     void onPointerDownOutsideFocus(const sp<IBinder>& newToken) override;
     void setPointerCapture(const PointerCaptureRequest& request) override;
diff --git a/services/inputflinger/tests/FakeInputReaderPolicy.cpp b/services/inputflinger/tests/FakeInputReaderPolicy.cpp
index e2dcb41..088c7df 100644
--- a/services/inputflinger/tests/FakeInputReaderPolicy.cpp
+++ b/services/inputflinger/tests/FakeInputReaderPolicy.cpp
@@ -82,9 +82,9 @@
     mConfig.setDisplayViewports(mViewports);
 }
 
-void FakeInputReaderPolicy::addDisplayViewport(int32_t displayId, int32_t width, int32_t height,
-                                               ui::Rotation orientation, bool isActive,
-                                               const std::string& uniqueId,
+void FakeInputReaderPolicy::addDisplayViewport(ui::LogicalDisplayId displayId, int32_t width,
+                                               int32_t height, ui::Rotation orientation,
+                                               bool isActive, const std::string& uniqueId,
                                                std::optional<uint8_t> physicalPort,
                                                ViewportType type) {
     const bool isRotated = orientation == ui::ROTATION_90 || orientation == ui::ROTATION_270;
@@ -178,7 +178,7 @@
     return mConfig.pointerCaptureRequest;
 }
 
-void FakeInputReaderPolicy::setDefaultPointerDisplayId(int32_t pointerDisplayId) {
+void FakeInputReaderPolicy::setDefaultPointerDisplayId(ui::LogicalDisplayId pointerDisplayId) {
     mConfig.defaultPointerDisplayId = pointerDisplayId;
 }
 
@@ -255,8 +255,8 @@
 }
 
 std::optional<DisplayViewport> FakeInputReaderPolicy::getPointerViewportForAssociatedDisplay(
-        int32_t associatedDisplayId) {
-    if (associatedDisplayId == ADISPLAY_ID_NONE) {
+        ui::LogicalDisplayId associatedDisplayId) {
+    if (!associatedDisplayId.isValid()) {
         associatedDisplayId = mConfig.defaultPointerDisplayId;
     }
     for (auto& viewport : mViewports) {
diff --git a/services/inputflinger/tests/FakeInputReaderPolicy.h b/services/inputflinger/tests/FakeInputReaderPolicy.h
index 88f0ba7..94f1311 100644
--- a/services/inputflinger/tests/FakeInputReaderPolicy.h
+++ b/services/inputflinger/tests/FakeInputReaderPolicy.h
@@ -48,7 +48,7 @@
     std::optional<DisplayViewport> getDisplayViewportByType(ViewportType type) const;
     std::optional<DisplayViewport> getDisplayViewportByPort(uint8_t displayPort) const;
     void addDisplayViewport(DisplayViewport viewport);
-    void addDisplayViewport(int32_t displayId, int32_t width, int32_t height,
+    void addDisplayViewport(ui::LogicalDisplayId displayId, int32_t width, int32_t height,
                             ui::Rotation orientation, bool isActive, const std::string& uniqueId,
                             std::optional<uint8_t> physicalPort, ViewportType type);
     bool updateViewport(const DisplayViewport& viewport);
@@ -67,7 +67,7 @@
                                                            ui::Rotation surfaceRotation);
     void setTouchAffineTransformation(const TouchAffineTransformation t);
     PointerCaptureRequest setPointerCapture(const sp<IBinder>& window);
-    void setDefaultPointerDisplayId(int32_t pointerDisplayId);
+    void setDefaultPointerDisplayId(ui::LogicalDisplayId pointerDisplayId);
     void setPointerGestureEnabled(bool enabled);
     float getPointerGestureMovementSpeedRatio();
     float getPointerGestureZoomSpeedRatio();
@@ -77,7 +77,7 @@
     void setIsInputMethodConnectionActive(bool active);
     bool isInputMethodConnectionActive() override;
     std::optional<DisplayViewport> getPointerViewportForAssociatedDisplay(
-            int32_t associatedDisplayId) override;
+            ui::LogicalDisplayId associatedDisplayId) override;
 
 private:
     void getReaderConfiguration(InputReaderConfiguration* outConfig) override;
diff --git a/services/inputflinger/tests/FakePointerController.cpp b/services/inputflinger/tests/FakePointerController.cpp
index 28d4b67..731a286 100644
--- a/services/inputflinger/tests/FakePointerController.cpp
+++ b/services/inputflinger/tests/FakePointerController.cpp
@@ -32,7 +32,7 @@
     mHaveBounds = false;
 }
 
-const std::map<int32_t, std::vector<int32_t>>& FakePointerController::getSpots() {
+const std::map<ui::LogicalDisplayId, std::vector<int32_t>>& FakePointerController::getSpots() {
     return mSpotsByDisplay;
 }
 
@@ -51,9 +51,9 @@
     return {mX, mY};
 }
 
-int32_t FakePointerController::getDisplayId() const {
+ui::LogicalDisplayId FakePointerController::getDisplayId() const {
     if (!mEnabled || !mDisplayId) {
-        return ADISPLAY_ID_NONE;
+        return ui::ADISPLAY_ID_NONE;
     }
     return *mDisplayId;
 }
@@ -76,7 +76,7 @@
     mCustomIconStyle = icon.style;
 }
 
-void FakePointerController::setSkipScreenshot(int32_t displayId, bool skip) {
+void FakePointerController::setSkipScreenshot(ui::LogicalDisplayId displayId, bool skip) {
     if (skip) {
         mDisplaysToSkipScreenshot.insert(displayId);
     } else {
@@ -84,7 +84,7 @@
     }
 };
 
-void FakePointerController::assertViewportSet(int32_t displayId) {
+void FakePointerController::assertViewportSet(ui::LogicalDisplayId displayId) {
     ASSERT_TRUE(mDisplayId);
     ASSERT_EQ(displayId, mDisplayId);
 }
@@ -99,7 +99,7 @@
     ASSERT_NEAR(y, actualY, 1);
 }
 
-void FakePointerController::assertSpotCount(int32_t displayId, int32_t count) {
+void FakePointerController::assertSpotCount(ui::LogicalDisplayId displayId, int32_t count) {
     auto it = mSpotsByDisplay.find(displayId);
     ASSERT_TRUE(it != mSpotsByDisplay.end()) << "Spots not found for display " << displayId;
     ASSERT_EQ(static_cast<size_t>(count), it->second.size());
@@ -125,7 +125,8 @@
     ASSERT_EQ(std::nullopt, mCustomIconStyle);
 }
 
-void FakePointerController::assertIsHiddenOnMirroredDisplays(int32_t displayId, bool isHidden) {
+void FakePointerController::assertIsHiddenOnMirroredDisplays(ui::LogicalDisplayId displayId,
+                                                             bool isHidden) {
     if (isHidden) {
         ASSERT_TRUE(mDisplaysToSkipScreenshot.find(displayId) != mDisplaysToSkipScreenshot.end());
     } else {
@@ -166,7 +167,7 @@
 }
 
 void FakePointerController::setSpots(const PointerCoords*, const uint32_t*, BitSet32 spotIdBits,
-                                     int32_t displayId) {
+                                     ui::LogicalDisplayId displayId) {
     if (!mEnabled) return;
 
     std::vector<int32_t> newSpots;
diff --git a/services/inputflinger/tests/FakePointerController.h b/services/inputflinger/tests/FakePointerController.h
index b5b982e..5bc713f 100644
--- a/services/inputflinger/tests/FakePointerController.h
+++ b/services/inputflinger/tests/FakePointerController.h
@@ -17,7 +17,6 @@
 #pragma once
 
 #include <PointerControllerInterface.h>
-#include <gui/constants.h>
 #include <input/DisplayViewport.h>
 #include <input/Input.h>
 #include <utils/BitSet.h>
@@ -38,26 +37,26 @@
 
     void setBounds(float minX, float minY, float maxX, float maxY);
     void clearBounds();
-    const std::map<int32_t, std::vector<int32_t>>& getSpots();
+    const std::map<ui::LogicalDisplayId, std::vector<int32_t>>& getSpots();
 
     void setPosition(float x, float y) override;
     FloatPoint getPosition() const override;
-    int32_t getDisplayId() const override;
+    ui::LogicalDisplayId getDisplayId() const override;
     void setDisplayViewport(const DisplayViewport& viewport) override;
     void updatePointerIcon(PointerIconStyle iconId) override;
     void setCustomPointerIcon(const SpriteIcon& icon) override;
-    void setSkipScreenshot(int32_t displayId, bool skip) override;
+    void setSkipScreenshot(ui::LogicalDisplayId displayId, bool skip) override;
     void fade(Transition) override;
 
-    void assertViewportSet(int32_t displayId);
+    void assertViewportSet(ui::LogicalDisplayId displayId);
     void assertViewportNotSet();
     void assertPosition(float x, float y);
-    void assertSpotCount(int32_t displayId, int32_t count);
+    void assertSpotCount(ui::LogicalDisplayId displayId, int32_t count);
     void assertPointerIconSet(PointerIconStyle iconId);
     void assertPointerIconNotSet();
     void assertCustomPointerIconSet(PointerIconStyle iconId);
     void assertCustomPointerIconNotSet();
-    void assertIsHiddenOnMirroredDisplays(int32_t displayId, bool isHidden);
+    void assertIsHiddenOnMirroredDisplays(ui::LogicalDisplayId displayId, bool isHidden);
     bool isPointerShown();
 
 private:
@@ -67,20 +66,20 @@
     void unfade(Transition) override;
     void setPresentation(Presentation) override {}
     void setSpots(const PointerCoords*, const uint32_t*, BitSet32 spotIdBits,
-                  int32_t displayId) override;
+                  ui::LogicalDisplayId displayId) override;
     void clearSpots() override;
 
     const bool mEnabled;
     bool mHaveBounds{false};
     float mMinX{0}, mMinY{0}, mMaxX{0}, mMaxY{0};
     float mX{0}, mY{0};
-    std::optional<int32_t> mDisplayId;
+    std::optional<ui::LogicalDisplayId> mDisplayId;
     bool mIsPointerShown{false};
     std::optional<PointerIconStyle> mIconStyle;
     std::optional<PointerIconStyle> mCustomIconStyle;
 
-    std::map<int32_t, std::vector<int32_t>> mSpotsByDisplay;
-    std::unordered_set<int32_t> mDisplaysToSkipScreenshot;
+    std::map<ui::LogicalDisplayId, std::vector<int32_t>> mSpotsByDisplay;
+    std::unordered_set<ui::LogicalDisplayId> mDisplaysToSkipScreenshot;
 };
 
 } // namespace android
diff --git a/services/inputflinger/tests/FakeWindows.cpp b/services/inputflinger/tests/FakeWindows.cpp
index a6955ec..c800d6a 100644
--- a/services/inputflinger/tests/FakeWindows.cpp
+++ b/services/inputflinger/tests/FakeWindows.cpp
@@ -81,7 +81,7 @@
 }
 
 void FakeInputReceiver::consumeEvent(InputEventType expectedEventType, int32_t expectedAction,
-                                     std::optional<int32_t> expectedDisplayId,
+                                     std::optional<ui::LogicalDisplayId> expectedDisplayId,
                                      std::optional<int32_t> expectedFlags) {
     std::unique_ptr<InputEvent> event = consume(CONSUME_TIMEOUT_EVENT_EXPECTED);
 
@@ -152,7 +152,7 @@
     ASSERT_NE(nullptr, event) << mName.c_str() << ": consumer should have returned non-NULL event.";
     ASSERT_EQ(InputEventType::FOCUS, event->getType()) << "Instead of FocusEvent, got " << *event;
 
-    ASSERT_EQ(ADISPLAY_ID_NONE, event->getDisplayId())
+    ASSERT_EQ(ui::ADISPLAY_ID_NONE, event->getDisplayId())
             << mName.c_str() << ": event displayId should always be NONE.";
 
     FocusEvent& focusEvent = static_cast<FocusEvent&>(*event);
@@ -165,7 +165,7 @@
     ASSERT_EQ(InputEventType::CAPTURE, event->getType())
             << "Instead of CaptureEvent, got " << *event;
 
-    ASSERT_EQ(ADISPLAY_ID_NONE, event->getDisplayId())
+    ASSERT_EQ(ui::ADISPLAY_ID_NONE, event->getDisplayId())
             << mName.c_str() << ": event displayId should always be NONE.";
 
     const auto& captureEvent = static_cast<const CaptureEvent&>(*event);
@@ -177,7 +177,7 @@
     ASSERT_NE(nullptr, event) << mName.c_str() << ": consumer should have returned non-NULL event.";
     ASSERT_EQ(InputEventType::DRAG, event->getType()) << "Instead of DragEvent, got " << *event;
 
-    EXPECT_EQ(ADISPLAY_ID_NONE, event->getDisplayId())
+    EXPECT_EQ(ui::ADISPLAY_ID_NONE, event->getDisplayId())
             << mName.c_str() << ": event displayId should always be NONE.";
 
     const auto& dragEvent = static_cast<const DragEvent&>(*event);
@@ -192,7 +192,7 @@
     ASSERT_EQ(InputEventType::TOUCH_MODE, event->getType())
             << "Instead of TouchModeEvent, got " << *event;
 
-    ASSERT_EQ(ADISPLAY_ID_NONE, event->getDisplayId())
+    ASSERT_EQ(ui::ADISPLAY_ID_NONE, event->getDisplayId())
             << mName.c_str() << ": event displayId should always be NONE.";
     const auto& touchModeEvent = static_cast<const TouchModeEvent&>(*event);
     EXPECT_EQ(inTouchMode, touchModeEvent.isInTouchMode());
@@ -244,7 +244,7 @@
 FakeWindowHandle::FakeWindowHandle(
         const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle,
         const std::unique_ptr<inputdispatcher::InputDispatcher>& dispatcher, const std::string name,
-        int32_t displayId, bool createInputChannel)
+        ui::LogicalDisplayId displayId, bool createInputChannel)
       : mName(name) {
     sp<IBinder> token;
     if (createInputChannel) {
@@ -272,7 +272,7 @@
     mInfo.inputConfig = InputConfig::DEFAULT;
 }
 
-sp<FakeWindowHandle> FakeWindowHandle::clone(int32_t displayId) {
+sp<FakeWindowHandle> FakeWindowHandle::clone(ui::LogicalDisplayId displayId) {
     sp<FakeWindowHandle> handle = sp<FakeWindowHandle>::make(mInfo.name + "(Mirror)");
     handle->mInfo = mInfo;
     handle->mInfo.displayId = displayId;
diff --git a/services/inputflinger/tests/FakeWindows.h b/services/inputflinger/tests/FakeWindows.h
index 6cd76b2..8a40337 100644
--- a/services/inputflinger/tests/FakeWindows.h
+++ b/services/inputflinger/tests/FakeWindows.h
@@ -79,7 +79,7 @@
     void sendTimeline(int32_t inputEventId, std::array<nsecs_t, GraphicsTimeline::SIZE> timeline);
 
     void consumeEvent(android::InputEventType expectedEventType, int32_t expectedAction,
-                      std::optional<int32_t> expectedDisplayId,
+                      std::optional<ui::LogicalDisplayId> expectedDisplayId,
                       std::optional<int32_t> expectedFlags);
 
     std::unique_ptr<MotionEvent> consumeMotion();
@@ -119,9 +119,10 @@
 
     FakeWindowHandle(const std::shared_ptr<InputApplicationHandle>& inputApplicationHandle,
                      const std::unique_ptr<inputdispatcher::InputDispatcher>& dispatcher,
-                     const std::string name, int32_t displayId, bool createInputChannel = true);
+                     const std::string name, ui::LogicalDisplayId displayId,
+                     bool createInputChannel = true);
 
-    sp<FakeWindowHandle> clone(int32_t displayId);
+    sp<FakeWindowHandle> clone(ui::LogicalDisplayId displayId);
 
     inline void setTouchable(bool touchable) {
         mInfo.setInputConfig(InputConfig::NOT_TOUCHABLE, !touchable);
@@ -249,37 +250,39 @@
         return keyEvent;
     }
 
-    inline void consumeKeyDown(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    inline void consumeKeyDown(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         consumeKeyEvent(testing::AllOf(WithKeyAction(AKEY_EVENT_ACTION_DOWN),
                                        WithDisplayId(expectedDisplayId), WithFlags(expectedFlags)));
     }
 
-    inline void consumeKeyUp(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    inline void consumeKeyUp(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         consumeKeyEvent(testing::AllOf(WithKeyAction(AKEY_EVENT_ACTION_UP),
                                        WithDisplayId(expectedDisplayId), WithFlags(expectedFlags)));
     }
 
-    inline void consumeMotionCancel(int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
-                                    int32_t expectedFlags = 0) {
+    inline void consumeMotionCancel(
+            ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
+            int32_t expectedFlags = 0) {
         consumeMotionEvent(testing::AllOf(WithMotionAction(AMOTION_EVENT_ACTION_CANCEL),
                                           WithDisplayId(expectedDisplayId),
                                           WithFlags(expectedFlags | AMOTION_EVENT_FLAG_CANCELED)));
     }
 
-    inline void consumeMotionMove(int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
+    inline void consumeMotionMove(ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
                                   int32_t expectedFlags = 0) {
         consumeMotionEvent(testing::AllOf(WithMotionAction(AMOTION_EVENT_ACTION_MOVE),
                                           WithDisplayId(expectedDisplayId),
                                           WithFlags(expectedFlags)));
     }
 
-    inline void consumeMotionDown(int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
+    inline void consumeMotionDown(ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
                                   int32_t expectedFlags = 0) {
         consumeAnyMotionDown(expectedDisplayId, expectedFlags);
     }
 
-    inline void consumeAnyMotionDown(std::optional<int32_t> expectedDisplayId = std::nullopt,
-                                     std::optional<int32_t> expectedFlags = std::nullopt) {
+    inline void consumeAnyMotionDown(
+            std::optional<ui::LogicalDisplayId> expectedDisplayId = std::nullopt,
+            std::optional<int32_t> expectedFlags = std::nullopt) {
         consumeMotionEvent(
                 testing::AllOf(WithMotionAction(AMOTION_EVENT_ACTION_DOWN),
                                testing::Conditional(expectedDisplayId.has_value(),
@@ -288,9 +291,9 @@
                                                     WithFlags(*expectedFlags), testing::_)));
     }
 
-    inline void consumeMotionPointerDown(int32_t pointerIdx,
-                                         int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
-                                         int32_t expectedFlags = 0) {
+    inline void consumeMotionPointerDown(
+            int32_t pointerIdx, ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
+            int32_t expectedFlags = 0) {
         const int32_t action = AMOTION_EVENT_ACTION_POINTER_DOWN |
                 (pointerIdx << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
         consumeMotionEvent(testing::AllOf(WithMotionAction(action),
@@ -298,9 +301,9 @@
                                           WithFlags(expectedFlags)));
     }
 
-    inline void consumeMotionPointerUp(int32_t pointerIdx,
-                                       int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
-                                       int32_t expectedFlags = 0) {
+    inline void consumeMotionPointerUp(
+            int32_t pointerIdx, ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
+            int32_t expectedFlags = 0) {
         const int32_t action = AMOTION_EVENT_ACTION_POINTER_UP |
                 (pointerIdx << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
         consumeMotionEvent(testing::AllOf(WithMotionAction(action),
@@ -308,15 +311,16 @@
                                           WithFlags(expectedFlags)));
     }
 
-    inline void consumeMotionUp(int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
+    inline void consumeMotionUp(ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
                                 int32_t expectedFlags = 0) {
         consumeMotionEvent(testing::AllOf(WithMotionAction(AMOTION_EVENT_ACTION_UP),
                                           WithDisplayId(expectedDisplayId),
                                           WithFlags(expectedFlags)));
     }
 
-    inline void consumeMotionOutside(int32_t expectedDisplayId = ADISPLAY_ID_DEFAULT,
-                                     int32_t expectedFlags = 0) {
+    inline void consumeMotionOutside(
+            ui::LogicalDisplayId expectedDisplayId = ui::ADISPLAY_ID_DEFAULT,
+            int32_t expectedFlags = 0) {
         consumeMotionEvent(testing::AllOf(WithMotionAction(AMOTION_EVENT_ACTION_OUTSIDE),
                                           WithDisplayId(expectedDisplayId),
                                           WithFlags(expectedFlags)));
diff --git a/services/inputflinger/tests/FocusResolver_test.cpp b/services/inputflinger/tests/FocusResolver_test.cpp
index cb8c3cb..f794da5 100644
--- a/services/inputflinger/tests/FocusResolver_test.cpp
+++ b/services/inputflinger/tests/FocusResolver_test.cpp
@@ -74,7 +74,7 @@
     std::optional<FocusResolver::FocusChanges> changes =
             focusResolver.setFocusedWindow(request, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ focusableWindowToken);
-    ASSERT_EQ(request.displayId, changes->displayId);
+    ASSERT_EQ(ui::LogicalDisplayId{request.displayId}, changes->displayId);
 
     // invisible window cannot get focused
     request.token = invisibleWindowToken;
@@ -169,19 +169,20 @@
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ focusableWindowToken);
 
     // The mirror window now comes on top, and the focus does not change
-    changes = focusResolver.setInputWindows(request.displayId, {mirror, window});
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId},
+                                            {mirror, window});
     ASSERT_FALSE(changes.has_value());
 
     // The window now comes on top while the mirror is removed, and the focus does not change
-    changes = focusResolver.setInputWindows(request.displayId, {window});
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, {window});
     ASSERT_FALSE(changes.has_value());
 
     // The window is removed but the mirror is on top, and focus does not change
-    changes = focusResolver.setInputWindows(request.displayId, {mirror});
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, {mirror});
     ASSERT_FALSE(changes.has_value());
 
     // All windows removed
-    changes = focusResolver.setInputWindows(request.displayId, {});
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, {});
     ASSERT_FOCUS_CHANGE(changes, /*from*/ focusableWindowToken, /*to*/ nullptr);
 }
 
@@ -203,12 +204,12 @@
     ASSERT_EQ(focusableWindowToken, changes->newFocus);
 
     // When there are no changes to the window, focus does not change
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FALSE(changes.has_value());
 
     // Window visibility changes and the window loses focus
     window->setVisible(false);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ focusableWindowToken, /*to*/ nullptr);
 }
 
@@ -232,7 +233,7 @@
 
     // Window visibility changes and the window gets focused
     invisibleWindow->setVisible(true);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ invisibleWindowToken);
 }
 
@@ -256,25 +257,25 @@
 
     // Focusability changes and the window gets focused
     window->setFocusable(true);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ windowToken);
 
     // Visibility changes and the window loses focus
     window->setVisible(false);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ windowToken, /*to*/ nullptr);
 
     // Visibility changes and the window gets focused
     window->setVisible(true);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ windowToken);
 
     // Window is gone and the window loses focus
-    changes = focusResolver.setInputWindows(request.displayId, {});
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, {});
     ASSERT_FOCUS_CHANGE(changes, /*from*/ windowToken, /*to*/ nullptr);
 
     // Window returns and the window gains focus
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ windowToken);
 }
 
@@ -307,27 +308,27 @@
 
     // Embedded is now focusable so will gain focus
     embeddedWindow->setFocusable(true);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ hostWindowToken, /*to*/ embeddedWindowToken);
 
     // Embedded is not visible so host will get focus
     embeddedWindow->setVisible(false);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ embeddedWindowToken, /*to*/ hostWindowToken);
 
     // Embedded is now visible so will get focus
     embeddedWindow->setVisible(true);
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ hostWindowToken, /*to*/ embeddedWindowToken);
 
     // Remove focusTransferTarget from host. Host will gain focus.
     hostWindow->editInfo()->focusTransferTarget = nullptr;
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ embeddedWindowToken, /*to*/ hostWindowToken);
 
     // Set invalid token for focusTransferTarget. Host will remain focus
     hostWindow->editInfo()->focusTransferTarget = sp<BBinder>::make();
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FALSE(changes);
 }
 
@@ -415,16 +416,16 @@
     std::optional<FocusResolver::FocusChanges> changes =
             focusResolver.setFocusedWindow(request, windows);
     ASSERT_FOCUS_CHANGE(changes, /*from*/ nullptr, /*to*/ windowToken);
-    ASSERT_EQ(request.displayId, changes->displayId);
+    ASSERT_EQ(ui::LogicalDisplayId{request.displayId}, changes->displayId);
 
     // When a display is removed, all windows are removed from the display
     // and our focused window loses focus
-    changes = focusResolver.setInputWindows(request.displayId, {});
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, {});
     ASSERT_FOCUS_CHANGE(changes, /*from*/ windowToken, /*to*/ nullptr);
-    focusResolver.displayRemoved(request.displayId);
+    focusResolver.displayRemoved(ui::LogicalDisplayId{request.displayId});
 
     // When a display is re-added, the window does not get focus since the request was cleared.
-    changes = focusResolver.setInputWindows(request.displayId, windows);
+    changes = focusResolver.setInputWindows(ui::LogicalDisplayId{request.displayId}, windows);
     ASSERT_FALSE(changes);
 }
 
diff --git a/services/inputflinger/tests/GestureConverter_test.cpp b/services/inputflinger/tests/GestureConverter_test.cpp
index f50f517..1132e92 100644
--- a/services/inputflinger/tests/GestureConverter_test.cpp
+++ b/services/inputflinger/tests/GestureConverter_test.cpp
@@ -20,7 +20,6 @@
 #include <flag_macros.h>
 #include <gestures/GestureConverter.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 
 #include "FakeEventHub.h"
 #include "FakeInputReaderPolicy.h"
@@ -46,6 +45,7 @@
 
 } // namespace
 
+using android::ui::ADISPLAY_ID_DEFAULT;
 using testing::AllOf;
 using testing::Each;
 using testing::ElementsAre;
@@ -93,7 +93,7 @@
 TEST_F(GestureConverterTest, Move) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
     std::list<NotifyArgs> args =
@@ -125,7 +125,7 @@
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
     converter.setOrientation(ui::ROTATION_90);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
     std::list<NotifyArgs> args =
@@ -147,7 +147,7 @@
 TEST_F(GestureConverterTest, ButtonsChange) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     // Press left and right buttons at once
     Gesture downGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
@@ -172,7 +172,7 @@
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithCoords(0, 0),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     // Then release the left button
     Gesture leftUpGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
@@ -203,13 +203,13 @@
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithButtonState(0), WithCoords(0, 0),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, ButtonDownAfterMoveExitsHover) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
     std::list<NotifyArgs> args =
@@ -229,7 +229,7 @@
 TEST_F(GestureConverterTest, DragWithButton) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     // Press the button
     Gesture downGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
@@ -248,7 +248,7 @@
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithCoords(0, 0),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     // Move
     Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
@@ -258,7 +258,7 @@
                         AllOf(WithMotionAction(AMOTION_EVENT_ACTION_MOVE), WithCoords(0, 0),
                               WithRelativeMotion(-5, 10), WithToolType(ToolType::FINGER),
                               WithButtonState(AMOTION_EVENT_BUTTON_PRIMARY), WithPressure(1.0f),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     // Release the button
     Gesture upGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
@@ -276,14 +276,14 @@
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithButtonState(0), WithCoords(0, 0),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Scroll) {
     const nsecs_t downTime = 12345;
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -10);
     std::list<NotifyArgs> args =
@@ -303,7 +303,7 @@
                         AllOf(WithMotionClassification(MotionClassification::TWO_FINGER_SWIPE),
                               WithFlags(AMOTION_EVENT_FLAG_IS_GENERATED_GESTURE),
                               WithToolType(ToolType::FINGER),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture continueGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -5);
     args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, ARBITRARY_TIME, continueGesture);
@@ -314,7 +314,7 @@
                               WithMotionClassification(MotionClassification::TWO_FINGER_SWIPE),
                               WithToolType(ToolType::FINGER),
                               WithFlags(AMOTION_EVENT_FLAG_IS_GENERATED_GESTURE),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture flingGesture(kGestureFling, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 1, 1,
                          GESTURES_FLING_START);
@@ -333,7 +333,7 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Scroll_Rotated) {
@@ -341,7 +341,7 @@
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
     converter.setOrientation(ui::ROTATION_90);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -10);
     std::list<NotifyArgs> args =
@@ -360,7 +360,7 @@
                 Each(VariantWith<NotifyMotionArgs>(
                         AllOf(WithMotionClassification(MotionClassification::TWO_FINGER_SWIPE),
                               WithToolType(ToolType::FINGER),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture continueGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -5);
     args = converter.handleGesture(ARBITRARY_TIME, READ_TIME, ARBITRARY_TIME, continueGesture);
@@ -388,13 +388,13 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Scroll_ClearsClassificationAfterGesture) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -10);
     std::list<NotifyArgs> args =
@@ -412,13 +412,13 @@
     ASSERT_THAT(args,
                 ElementsAre(VariantWith<NotifyMotionArgs>(
                         AllOf(WithMotionClassification(MotionClassification::NONE),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Scroll_ClearsScrollDistanceAfterGesture) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -10);
     std::list<NotifyArgs> args =
@@ -443,7 +443,7 @@
 TEST_F(GestureConverterTest, ThreeFingerSwipe_ClearsClassificationAfterGesture) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureSwipe, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /*dx=*/0,
                          /*dy=*/0);
@@ -464,7 +464,7 @@
 TEST_F(GestureConverterTest, ThreeFingerSwipe_ClearsGestureAxesAfterGesture) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureSwipe, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /*dx=*/5,
                          /*dy=*/5);
@@ -491,7 +491,7 @@
     // only checks movement in one dimension.
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureSwipe, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* dx= */ 0,
                          /* dy= */ 10);
@@ -502,7 +502,7 @@
                 Each(VariantWith<NotifyMotionArgs>(
                         AllOf(WithMotionClassification(MotionClassification::MULTI_FINGER_SWIPE),
                               WithGestureSwipeFingerCount(3), WithToolType(ToolType::FINGER),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     // Three fake fingers should be created. We don't actually care where they are, so long as they
     // move appropriately.
@@ -548,7 +548,7 @@
                       WithGestureOffset(0, -0.005, EPSILON), WithGestureSwipeFingerCount(3),
                       WithMotionClassification(MotionClassification::MULTI_FINGER_SWIPE),
                       WithPointerCount(3u), WithToolType(ToolType::FINGER),
-                      WithDisplayId(ADISPLAY_ID_DEFAULT)));
+                      WithDisplayId(ui::ADISPLAY_ID_DEFAULT)));
     EXPECT_EQ(arg.pointerCoords[0].getX(), finger0Start.getX());
     EXPECT_EQ(arg.pointerCoords[1].getX(), finger1Start.getX());
     EXPECT_EQ(arg.pointerCoords[2].getX(), finger2Start.getX());
@@ -590,21 +590,21 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, ThreeFingerSwipe_Rotated) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
     converter.setOrientation(ui::ROTATION_90);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureSwipe, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* dx= */ 0,
                          /* dy= */ 10);
     std::list<NotifyArgs> args =
             converter.handleGesture(ARBITRARY_TIME, READ_TIME, ARBITRARY_TIME, startGesture);
     ASSERT_EQ(4u, args.size());
-    ASSERT_THAT(args, Each(VariantWith<NotifyMotionArgs>(WithDisplayId(ADISPLAY_ID_DEFAULT))));
+    ASSERT_THAT(args, Each(VariantWith<NotifyMotionArgs>(WithDisplayId(ui::ADISPLAY_ID_DEFAULT))));
 
     // Three fake fingers should be created. We don't actually care where they are, so long as they
     // move appropriately.
@@ -648,7 +648,7 @@
     ASSERT_THAT(arg,
                 AllOf(WithMotionAction(AMOTION_EVENT_ACTION_MOVE),
                       WithGestureOffset(0, -0.005, EPSILON), WithPointerCount(3u),
-                      WithDisplayId(ADISPLAY_ID_DEFAULT)));
+                      WithDisplayId(ui::ADISPLAY_ID_DEFAULT)));
     EXPECT_EQ(arg.pointerCoords[0].getX(), finger0Start.getX() - 15);
     EXPECT_EQ(arg.pointerCoords[1].getX(), finger1Start.getX() - 15);
     EXPECT_EQ(arg.pointerCoords[2].getX(), finger2Start.getX() - 15);
@@ -680,7 +680,7 @@
 TEST_F(GestureConverterTest, FourFingerSwipe_Horizontal) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureFourFingerSwipe, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
                          /* dx= */ 10, /* dy= */ 0);
@@ -691,7 +691,7 @@
                 Each(VariantWith<NotifyMotionArgs>(
                         AllOf(WithMotionClassification(MotionClassification::MULTI_FINGER_SWIPE),
                               WithGestureSwipeFingerCount(4), WithToolType(ToolType::FINGER),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     // Four fake fingers should be created. We don't actually care where they are, so long as they
     // move appropriately.
@@ -746,7 +746,7 @@
                       WithGestureOffset(0.005, 0, EPSILON), WithGestureSwipeFingerCount(4),
                       WithMotionClassification(MotionClassification::MULTI_FINGER_SWIPE),
                       WithPointerCount(4u), WithToolType(ToolType::FINGER),
-                      WithDisplayId(ADISPLAY_ID_DEFAULT)));
+                      WithDisplayId(ui::ADISPLAY_ID_DEFAULT)));
     EXPECT_EQ(arg.pointerCoords[0].getX(), finger0Start.getX() + 15);
     EXPECT_EQ(arg.pointerCoords[1].getX(), finger1Start.getX() + 15);
     EXPECT_EQ(arg.pointerCoords[2].getX(), finger2Start.getX() + 15);
@@ -799,13 +799,13 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Pinch_Inwards) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGesturePinch, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* dz= */ 1,
                          GESTURES_ZOOM_START);
@@ -825,7 +825,7 @@
                         AllOf(WithMotionClassification(MotionClassification::PINCH),
                               WithGesturePinchScaleFactor(1.0f, EPSILON),
                               WithToolType(ToolType::FINGER),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture updateGesture(kGesturePinch, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
                           /* dz= */ 0.8, GESTURES_ZOOM_UPDATE);
@@ -837,7 +837,7 @@
                               WithGesturePinchScaleFactor(0.8f, EPSILON),
                               WithPointerCoords(0, -80, 0), WithPointerCoords(1, 80, 0),
                               WithPointerCount(2u), WithToolType(ToolType::FINGER),
-                              WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                              WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture endGesture(kGesturePinch, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* dz= */ 1,
                        GESTURES_ZOOM_END);
@@ -923,13 +923,13 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Pinch_ClearsClassificationAfterGesture) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGesturePinch, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /*dz=*/1,
                          GESTURES_ZOOM_START);
@@ -954,7 +954,7 @@
 TEST_F(GestureConverterTest, Pinch_ClearsScaleFactorAfterGesture) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGesturePinch, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /*dz=*/1,
                          GESTURES_ZOOM_START);
@@ -981,7 +981,7 @@
 TEST_F(GestureConverterTest, ResetWithButtonPressed) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture downGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
                         /*down=*/GESTURES_BUTTON_LEFT | GESTURES_BUTTON_RIGHT,
@@ -1007,13 +1007,13 @@
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithCoords(0, 0),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, ResetDuringScroll) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -10);
     (void)converter.handleGesture(ARBITRARY_TIME, READ_TIME, ARBITRARY_TIME, startGesture);
@@ -1033,13 +1033,13 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, ResetDuringThreeFingerSwipe) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGestureSwipe, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /*dx=*/0,
                          /*dy=*/10);
@@ -1074,13 +1074,13 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, ResetDuringPinch) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture startGesture(kGesturePinch, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /*dz=*/1,
                          GESTURES_ZOOM_START);
@@ -1106,13 +1106,13 @@
                                           WithMotionClassification(MotionClassification::NONE)))));
     ASSERT_THAT(args,
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, FlingTapDown) {
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture tapDownGesture(kGestureFling, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
                            /*vx=*/0.f, /*vy=*/0.f, GESTURES_FLING_TAP_DOWN);
@@ -1129,7 +1129,7 @@
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     input_flags::enable_touchpad_fling_stop(true);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture scrollGesture(kGestureScroll, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, 0, -10);
     std::list<NotifyArgs> args =
@@ -1161,7 +1161,7 @@
     // Tap should produce button press/release events
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture flingGesture(kGestureFling, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* vx= */ 0,
                          /* vy= */ 0, GESTURES_FLING_TAP_DOWN);
@@ -1201,14 +1201,14 @@
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithCoords(0, 0),
                                                          WithRelativeMotion(0.f, 0.f),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 }
 
 TEST_F(GestureConverterTest, Click) {
     // Click should produce button press/release events
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture flingGesture(kGestureFling, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* vx= */ 0,
                          /* vy= */ 0, GESTURES_FLING_TAP_DOWN);
@@ -1238,7 +1238,7 @@
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithCoords(0, 0),
                                                          WithRelativeMotion(0.f, 0.f),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture buttonUpGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
                             /* down= */ GESTURES_BUTTON_NONE,
@@ -1273,7 +1273,7 @@
 
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture flingGesture(kGestureFling, currentTime, currentTime, /* vx= */ 0,
                          /* vy= */ 0, GESTURES_FLING_TAP_DOWN);
@@ -1302,7 +1302,7 @@
 
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture flingGesture(kGestureFling, currentTime, currentTime, /* vx= */ 0,
                          /* vy= */ 0, GESTURES_FLING_TAP_DOWN);
@@ -1384,7 +1384,7 @@
 
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture flingGesture(kGestureFling, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, /* vx= */ 0,
                          /* vy= */ 0, GESTURES_FLING_TAP_DOWN);
@@ -1414,7 +1414,7 @@
                 Each(VariantWith<NotifyMotionArgs>(AllOf(WithCoords(0, 0),
                                                          WithRelativeMotion(0.f, 0.f),
                                                          WithToolType(ToolType::FINGER),
-                                                         WithDisplayId(ADISPLAY_ID_DEFAULT)))));
+                                                         WithDisplayId(ui::ADISPLAY_ID_DEFAULT)))));
 
     Gesture buttonUpGesture(kGestureButtonsChange, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME,
                             /* down= */ GESTURES_BUTTON_NONE,
@@ -1452,7 +1452,7 @@
 
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     Gesture moveGesture(kGestureMove, ARBITRARY_GESTURE_TIME, ARBITRARY_GESTURE_TIME, -5, 10);
     std::list<NotifyArgs> args =
@@ -1468,7 +1468,7 @@
     const nsecs_t gestureStartTime = 1000;
     InputDeviceContext deviceContext(*mDevice, EVENTHUB_ID);
     GestureConverter converter(*mReader->getContext(), deviceContext, DEVICE_ID);
-    converter.setDisplayId(ADISPLAY_ID_DEFAULT);
+    converter.setDisplayId(ui::ADISPLAY_ID_DEFAULT);
 
     // Start a move gesture at gestureStartTime
     Gesture moveGesture(kGestureMove, gestureStartTime, gestureStartTime, -5, 10);
diff --git a/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp b/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp
index 85e055d..029414b 100644
--- a/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp
+++ b/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp
@@ -18,7 +18,6 @@
 
 #include <NotifyArgsBuilders.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <input/InputEventBuilders.h>
 #include <linux/input.h>
 
@@ -64,7 +63,7 @@
                                        uint32_t sources = TOUCHSCREEN | STYLUS) {
     auto info = InputDeviceInfo();
     info.initialize(id, /*generation=*/1, /*controllerNumber=*/1, generateTestIdentifier(id),
-                    "alias", /*isExternal=*/false, /*hasMic=*/false, ADISPLAY_ID_NONE);
+                    "alias", /*isExternal=*/false, /*hasMic=*/false, ui::ADISPLAY_ID_NONE);
     info.addSource(sources);
     return info;
 }
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 09b358a..184659d 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -53,6 +53,7 @@
 using android::gui::WindowInfoHandle;
 using android::os::InputEventInjectionResult;
 using android::os::InputEventInjectionSync;
+using android::ui::ADISPLAY_ID_DEFAULT;
 
 namespace android::inputdispatcher {
 
@@ -72,8 +73,8 @@
 static constexpr int32_t SECOND_DEVICE_ID = 2;
 
 // An arbitrary display id.
-static constexpr int32_t DISPLAY_ID = ADISPLAY_ID_DEFAULT;
-static constexpr int32_t SECOND_DISPLAY_ID = 1;
+constexpr ui::LogicalDisplayId DISPLAY_ID = ADISPLAY_ID_DEFAULT;
+constexpr ui::LogicalDisplayId SECOND_DISPLAY_ID = ui::LogicalDisplayId{1};
 
 // Ensure common actions are interchangeable between keys and motions for convenience.
 static_assert(AMOTION_EVENT_ACTION_DOWN == AKEY_EVENT_ACTION_DOWN);
@@ -128,7 +129,7 @@
 static KeyEvent getTestKeyEvent() {
     KeyEvent event;
 
-    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE,
+    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_NONE,
                      INVALID_HMAC, AKEY_EVENT_ACTION_DOWN, 0, AKEYCODE_A, KEY_A, AMETA_NONE, 0,
                      ARBITRARY_TIME, ARBITRARY_TIME);
     return event;
@@ -243,7 +244,7 @@
         request.token = window->getToken();
         request.windowName = window->getName();
         request.timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
-        request.displayId = window->getInfo()->displayId;
+        request.displayId = window->getInfo()->displayId.val();
         mDispatcher->setFocusedWindow(request);
     }
 };
@@ -252,7 +253,7 @@
     KeyEvent event;
 
     // Rejects undefined key actions.
-    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE,
+    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_NONE,
                      INVALID_HMAC,
                      /*action=*/-1, 0, AKEYCODE_A, KEY_A, AMETA_NONE, 0, ARBITRARY_TIME,
                      ARBITRARY_TIME);
@@ -262,7 +263,7 @@
             << "Should reject key events with undefined action.";
 
     // Rejects ACTION_MULTIPLE since it is not supported despite being defined in the API.
-    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE,
+    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_NONE,
                      INVALID_HMAC, AKEY_EVENT_ACTION_MULTIPLE, 0, AKEYCODE_A, KEY_A, AMETA_NONE, 0,
                      ARBITRARY_TIME, ARBITRARY_TIME);
     ASSERT_EQ(InputEventInjectionResult::FAILED,
@@ -438,12 +439,13 @@
 
 class FakeMonitorReceiver {
 public:
-    FakeMonitorReceiver(InputDispatcher& dispatcher, const std::string name, int32_t displayId)
+    FakeMonitorReceiver(InputDispatcher& dispatcher, const std::string name,
+                        ui::LogicalDisplayId displayId)
           : mInputReceiver(*dispatcher.createInputMonitor(displayId, name, MONITOR_PID), name) {}
 
     sp<IBinder> getToken() { return mInputReceiver.getToken(); }
 
-    void consumeKeyDown(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    void consumeKeyDown(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         mInputReceiver.consumeEvent(InputEventType::KEY, AKEY_EVENT_ACTION_DOWN, expectedDisplayId,
                                     expectedFlags);
     }
@@ -455,22 +457,22 @@
 
     void finishEvent(uint32_t consumeSeq) { return mInputReceiver.finishEvent(consumeSeq); }
 
-    void consumeMotionDown(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    void consumeMotionDown(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         mInputReceiver.consumeEvent(InputEventType::MOTION, AMOTION_EVENT_ACTION_DOWN,
                                     expectedDisplayId, expectedFlags);
     }
 
-    void consumeMotionMove(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    void consumeMotionMove(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         mInputReceiver.consumeEvent(InputEventType::MOTION, AMOTION_EVENT_ACTION_MOVE,
                                     expectedDisplayId, expectedFlags);
     }
 
-    void consumeMotionUp(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    void consumeMotionUp(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         mInputReceiver.consumeEvent(InputEventType::MOTION, AMOTION_EVENT_ACTION_UP,
                                     expectedDisplayId, expectedFlags);
     }
 
-    void consumeMotionCancel(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+    void consumeMotionCancel(ui::LogicalDisplayId expectedDisplayId, int32_t expectedFlags = 0) {
         mInputReceiver.consumeMotionEvent(
                 AllOf(WithMotionAction(AMOTION_EVENT_ACTION_CANCEL),
                       WithDisplayId(expectedDisplayId),
@@ -498,7 +500,7 @@
 
 static InputEventInjectionResult injectKey(
         InputDispatcher& dispatcher, int32_t action, int32_t repeatCount,
-        int32_t displayId = ADISPLAY_ID_NONE,
+        ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE,
         InputEventInjectionSync syncMode = InputEventInjectionSync::WAIT_FOR_RESULT,
         std::chrono::milliseconds injectionTimeout = INJECT_EVENT_TIMEOUT,
         bool allowKeyRepeat = true, std::optional<gui::Uid> targetUid = {},
@@ -520,30 +522,30 @@
 
 static void assertInjectedKeyTimesOut(InputDispatcher& dispatcher) {
     InputEventInjectionResult result =
-            injectKey(dispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, ADISPLAY_ID_NONE,
+            injectKey(dispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, ui::ADISPLAY_ID_NONE,
                       InputEventInjectionSync::WAIT_FOR_RESULT, CONSUME_TIMEOUT_NO_EVENT_EXPECTED);
     if (result != InputEventInjectionResult::TIMED_OUT) {
         FAIL() << "Injection should have timed out, but got " << ftl::enum_string(result);
     }
 }
 
-static InputEventInjectionResult injectKeyDown(InputDispatcher& dispatcher,
-                                               int32_t displayId = ADISPLAY_ID_NONE) {
+static InputEventInjectionResult injectKeyDown(
+        InputDispatcher& dispatcher, ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE) {
     return injectKey(dispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, displayId);
 }
 
 // Inject a down event that has key repeat disabled. This allows InputDispatcher to idle without
 // sending a subsequent key up. When key repeat is enabled, the dispatcher cannot idle because it
 // has to be woken up to process the repeating key.
-static InputEventInjectionResult injectKeyDownNoRepeat(InputDispatcher& dispatcher,
-                                                       int32_t displayId = ADISPLAY_ID_NONE) {
+static InputEventInjectionResult injectKeyDownNoRepeat(
+        InputDispatcher& dispatcher, ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE) {
     return injectKey(dispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, displayId,
                      InputEventInjectionSync::WAIT_FOR_RESULT, INJECT_EVENT_TIMEOUT,
                      /*allowKeyRepeat=*/false);
 }
 
-static InputEventInjectionResult injectKeyUp(InputDispatcher& dispatcher,
-                                             int32_t displayId = ADISPLAY_ID_NONE) {
+static InputEventInjectionResult injectKeyUp(
+        InputDispatcher& dispatcher, ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE) {
     return injectKey(dispatcher, AKEY_EVENT_ACTION_UP, /*repeatCount=*/0, displayId);
 }
 
@@ -557,7 +559,7 @@
 }
 
 static InputEventInjectionResult injectMotionEvent(
-        InputDispatcher& dispatcher, int32_t action, int32_t source, int32_t displayId,
+        InputDispatcher& dispatcher, int32_t action, int32_t source, ui::LogicalDisplayId displayId,
         const PointF& position = {100, 200},
         const PointF& cursorPosition = {AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                         AMOTION_EVENT_INVALID_CURSOR_POSITION},
@@ -583,18 +585,19 @@
 }
 
 static InputEventInjectionResult injectMotionDown(InputDispatcher& dispatcher, int32_t source,
-                                                  int32_t displayId,
+                                                  ui::LogicalDisplayId displayId,
                                                   const PointF& location = {100, 200}) {
     return injectMotionEvent(dispatcher, AMOTION_EVENT_ACTION_DOWN, source, displayId, location);
 }
 
 static InputEventInjectionResult injectMotionUp(InputDispatcher& dispatcher, int32_t source,
-                                                int32_t displayId,
+                                                ui::LogicalDisplayId displayId,
                                                 const PointF& location = {100, 200}) {
     return injectMotionEvent(dispatcher, AMOTION_EVENT_ACTION_UP, source, displayId, location);
 }
 
-static NotifyKeyArgs generateKeyArgs(int32_t action, int32_t displayId = ADISPLAY_ID_NONE) {
+static NotifyKeyArgs generateKeyArgs(int32_t action,
+                                     ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE) {
     nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
     // Define a valid key event.
     NotifyKeyArgs args(InputEvent::nextId(), currentTime, /*readTime=*/0, DEVICE_ID,
@@ -604,8 +607,8 @@
     return args;
 }
 
-static NotifyKeyArgs generateSystemShortcutArgs(int32_t action,
-                                                int32_t displayId = ADISPLAY_ID_NONE) {
+static NotifyKeyArgs generateSystemShortcutArgs(
+        int32_t action, ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE) {
     nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
     // Define a valid key event.
     NotifyKeyArgs args(InputEvent::nextId(), currentTime, /*readTime=*/0, DEVICE_ID,
@@ -615,8 +618,8 @@
     return args;
 }
 
-static NotifyKeyArgs generateAssistantKeyArgs(int32_t action,
-                                              int32_t displayId = ADISPLAY_ID_NONE) {
+static NotifyKeyArgs generateAssistantKeyArgs(
+        int32_t action, ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE) {
     nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
     // Define a valid key event.
     NotifyKeyArgs args(InputEvent::nextId(), currentTime, /*readTime=*/0, DEVICE_ID,
@@ -627,7 +630,7 @@
 }
 
 [[nodiscard]] static NotifyMotionArgs generateMotionArgs(int32_t action, int32_t source,
-                                                         int32_t displayId,
+                                                         ui::LogicalDisplayId displayId,
                                                          const std::vector<PointF>& points) {
     size_t pointerCount = points.size();
     if (action == AMOTION_EVENT_ACTION_DOWN || action == AMOTION_EVENT_ACTION_UP) {
@@ -664,7 +667,8 @@
     return generateMotionArgs(action, AINPUT_SOURCE_TOUCHSCREEN, DISPLAY_ID, points);
 }
 
-static NotifyMotionArgs generateMotionArgs(int32_t action, int32_t source, int32_t displayId) {
+static NotifyMotionArgs generateMotionArgs(int32_t action, int32_t source,
+                                           ui::LogicalDisplayId displayId) {
     return generateMotionArgs(action, source, displayId, {PointF{100, 200}});
 }
 
@@ -733,7 +737,7 @@
     mDispatcher->onWindowInfosChanged({{*window->getInfo()}, {}, 0, 0});
     // Inject a MotionEvent to an unknown display.
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
-              injectMotionDown(*mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_NONE))
+              injectMotionDown(*mDispatcher, AINPUT_SOURCE_TOUCHSCREEN, ui::ADISPLAY_ID_NONE))
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
 
     // Window should receive motion event.
@@ -1267,7 +1271,6 @@
               injectMotionEvent(*mDispatcher, secondFingerDownEvent, INJECT_EVENT_TIMEOUT,
                                 InputEventInjectionSync::WAIT_FOR_RESULT))
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
-
     foregroundWindow->consumeMotionPointerDown(/*pointerIndex=*/1);
     wallpaperWindow->consumeMotionPointerDown(/*pointerIndex=*/1, ADISPLAY_ID_DEFAULT,
                                               EXPECTED_WALLPAPER_FLAGS);
@@ -5567,8 +5570,8 @@
     ASSERT_NE(nullptr, event);
     EXPECT_EQ(AMOTION_EVENT_ACTION_CANCEL, event->getAction());
 
-    // The cancel event is sent to windowDefaultDisplay of the ADISPLAY_ID_DEFAULT display, so the
-    // coordinates of the cancel are converted by windowDefaultDisplay's transform, the x and y
+    // The cancel event is sent to windowDefaultDisplay of the ADISPLAY_ID_DEFAULT display, so
+    // the coordinates of the cancel are converted by windowDefaultDisplay's transform, the x and y
     // coordinates are both 100, otherwise if the cancel event is sent to windowSecondDisplay of
     // SECOND_DISPLAY_ID, the x and y coordinates are 200
     EXPECT_EQ(100, event->getX(0));
@@ -5589,7 +5592,7 @@
         removeAllWindowsAndDisplays();
     }
 
-    void addDisplayInfo(int displayId, const ui::Transform& transform) {
+    void addDisplayInfo(ui::LogicalDisplayId displayId, const ui::Transform& transform) {
         gui::DisplayInfo info;
         info.displayId = displayId;
         info.transform = transform;
@@ -7278,7 +7281,7 @@
     verifiedEvent.eventTimeNanos += 1;
     ASSERT_NE(initialHmac, mDispatcher->sign(verifiedEvent));
 
-    verifiedEvent.displayId += 1;
+    verifiedEvent.displayId = ui::LogicalDisplayId{verifiedEvent.displayId.val() + 1};
     ASSERT_NE(initialHmac, mDispatcher->sign(verifiedEvent));
 
     verifiedEvent.action += 1;
@@ -7323,7 +7326,7 @@
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
 
     // Focused window should receive event.
-    windowSecond->consumeKeyDown(ADISPLAY_ID_NONE);
+    windowSecond->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     windowTop->assertNoEvents();
 }
 
@@ -7388,7 +7391,7 @@
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
 
     // Focused window should receive event.
-    windowSecond->consumeKeyDown(ADISPLAY_ID_NONE);
+    windowSecond->consumeKeyDown(ui::ADISPLAY_ID_NONE);
 }
 
 TEST_F(InputDispatcherTest, SetFocusedWindow_TransferFocusTokenNotFocusable) {
@@ -7411,7 +7414,7 @@
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
 
     // Event should be dropped.
-    windowTop->consumeKeyDown(ADISPLAY_ID_NONE);
+    windowTop->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     windowSecond->assertNoEvents();
 }
 
@@ -8516,13 +8519,13 @@
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDownNoRepeat(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
     windowInPrimary->assertNoEvents();
-    windowInSecondary->consumeKeyDown(ADISPLAY_ID_NONE);
+    windowInSecondary->consumeKeyDown(ui::ADISPLAY_ID_NONE);
 
     // Remove all windows in secondary display.
     mDispatcher->onWindowInfosChanged({{*windowInPrimary->getInfo()}, {}, 0, 0});
 
     // Old focus should receive a cancel event.
-    windowInSecondary->consumeKeyUp(ADISPLAY_ID_NONE, AKEY_EVENT_FLAG_CANCELED);
+    windowInSecondary->consumeKeyUp(ui::ADISPLAY_ID_NONE, AKEY_EVENT_FLAG_CANCELED);
 
     // Test inject a key down, should timeout because of no target window.
     ASSERT_NO_FATAL_FAILURE(assertInjectedKeyTimesOut(*mDispatcher));
@@ -8567,12 +8570,12 @@
     // If specific a display, it will dispatch to the focused window of particular display,
     // or it will dispatch to the focused window of focused display.
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
-              injectMotionDown(*mDispatcher, AINPUT_SOURCE_TRACKBALL, ADISPLAY_ID_NONE))
+              injectMotionDown(*mDispatcher, AINPUT_SOURCE_TRACKBALL, ui::ADISPLAY_ID_NONE))
             << "Inject motion event should return InputEventInjectionResult::SUCCEEDED";
     windowInPrimary->assertNoEvents();
     monitorInPrimary.assertNoEvents();
-    windowInSecondary->consumeMotionDown(ADISPLAY_ID_NONE);
-    monitorInSecondary.consumeMotionDown(ADISPLAY_ID_NONE);
+    windowInSecondary->consumeMotionDown(ui::ADISPLAY_ID_NONE);
+    monitorInSecondary.consumeMotionDown(ui::ADISPLAY_ID_NONE);
 }
 
 // Test per-display input monitors for key event.
@@ -8588,8 +8591,8 @@
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
     windowInPrimary->assertNoEvents();
     monitorInPrimary.assertNoEvents();
-    windowInSecondary->consumeKeyDown(ADISPLAY_ID_NONE);
-    monitorInSecondary.consumeKeyDown(ADISPLAY_ID_NONE);
+    windowInSecondary->consumeKeyDown(ui::ADISPLAY_ID_NONE);
+    monitorInSecondary.consumeKeyDown(ui::ADISPLAY_ID_NONE);
 }
 
 TEST_F(InputDispatcherFocusOnTwoDisplaysTest, CanFocusWindowOnUnfocusedDisplay) {
@@ -8748,7 +8751,7 @@
 
 class InputFilterTest : public InputDispatcherTest {
 protected:
-    void testNotifyMotion(int32_t displayId, bool expectToBeFiltered,
+    void testNotifyMotion(ui::LogicalDisplayId displayId, bool expectToBeFiltered,
                           const ui::Transform& transform = ui::Transform()) {
         NotifyMotionArgs motionArgs;
 
@@ -8873,7 +8876,7 @@
 
         const nsecs_t eventTime = systemTime(SYSTEM_TIME_MONOTONIC);
         event.initialize(InputEvent::nextId(), injectedDeviceId, AINPUT_SOURCE_KEYBOARD,
-                         ADISPLAY_ID_NONE, INVALID_HMAC, AKEY_EVENT_ACTION_DOWN, 0, AKEYCODE_A,
+                         ui::ADISPLAY_ID_NONE, INVALID_HMAC, AKEY_EVENT_ACTION_DOWN, 0, AKEYCODE_A,
                          KEY_A, AMETA_NONE, /*repeatCount=*/0, eventTime, eventTime);
         const int32_t additionalPolicyFlags =
                 POLICY_FLAG_PASS_TO_USER | POLICY_FLAG_DISABLE_KEY_REPEAT;
@@ -8967,7 +8970,7 @@
         mWindow->consumeFocusEvent(true);
     }
 
-    void notifyAndConsumeMotion(int32_t action, uint32_t source, int32_t displayId,
+    void notifyAndConsumeMotion(int32_t action, uint32_t source, ui::LogicalDisplayId displayId,
                                 nsecs_t eventTime) {
         mDispatcher->notifyMotion(MotionArgsBuilder(action, source)
                                           .displayId(displayId)
@@ -9482,7 +9485,7 @@
 // Send a regular key and respond, which should not cause an ANR.
 TEST_F(InputDispatcherSingleWindowAnr, WhenKeyIsConsumed_NoAnr) {
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDownNoRepeat(*mDispatcher));
-    mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     ASSERT_TRUE(mDispatcher->waitForIdle());
     mFakePolicy->assertNotifyAnrWasNotCalled();
 }
@@ -9558,7 +9561,8 @@
     // injection times out (instead of failing).
     const InputEventInjectionResult result =
             injectKey(*mDispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, ADISPLAY_ID_DEFAULT,
-                      InputEventInjectionSync::WAIT_FOR_RESULT, 50ms, /*allowKeyRepeat=*/false);
+                      InputEventInjectionSync::WAIT_FOR_RESULT, 50ms,
+                      /*allowKeyRepeat=*/false);
     ASSERT_EQ(InputEventInjectionResult::TIMED_OUT, result);
     const std::chrono::duration timeout = mApplication->getDispatchingTimeout(DISPATCHING_TIMEOUT);
     mFakePolicy->assertNotifyNoFocusedWindowAnrWasCalled(timeout, mApplication);
@@ -9581,7 +9585,7 @@
             std::chrono::nanoseconds(STALE_EVENT_TIMEOUT).count();
 
     // Define a valid key down event that is stale (too old).
-    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE,
+    event.initialize(InputEvent::nextId(), DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_NONE,
                      INVALID_HMAC, AKEY_EVENT_ACTION_DOWN, /*flags=*/0, AKEYCODE_A, KEY_A,
                      AMETA_NONE, /*repeatCount=*/0, eventTime, eventTime);
 
@@ -10262,7 +10266,8 @@
 
     InputEventInjectionResult result =
             injectKey(*mDispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, ADISPLAY_ID_DEFAULT,
-                      InputEventInjectionSync::NONE, /*injectionTimeout=*/100ms);
+                      InputEventInjectionSync::NONE,
+                      /*injectionTimeout=*/100ms);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, result);
     // Key will not be sent to the window, yet, because the window is still processing events
     // and the key remains pending, waiting for the touch events to be processed.
@@ -10365,7 +10370,8 @@
     // Key will not be sent anywhere because we have no focused window. It will remain pending.
     InputEventInjectionResult result =
             injectKey(*mDispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, ADISPLAY_ID_DEFAULT,
-                      InputEventInjectionSync::NONE, /*injectionTimeout=*/100ms,
+                      InputEventInjectionSync::NONE,
+                      /*injectionTimeout=*/100ms,
                       /*allowKeyRepeat=*/false);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, result);
 
@@ -10467,7 +10473,8 @@
     // Pretend we are injecting KEYCODE_BACK, but it doesn't actually matter what key it is.
     InputEventInjectionResult result =
             injectKey(*mDispatcher, AKEY_EVENT_ACTION_DOWN, /*repeatCount=*/0, ADISPLAY_ID_DEFAULT,
-                      InputEventInjectionSync::NONE, /*injectionTimeout=*/100ms,
+                      InputEventInjectionSync::NONE,
+                      /*injectionTimeout=*/100ms,
                       /*allowKeyRepeat=*/false);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, result);
 
@@ -10476,7 +10483,8 @@
                                       .pointer(PointerBuilder(0, ToolType::FINGER).x(50).y(50))
                                       .build());
     result = injectKey(*mDispatcher, AKEY_EVENT_ACTION_UP, /*repeatCount=*/0, ADISPLAY_ID_DEFAULT,
-                       InputEventInjectionSync::NONE, /*injectionTimeout=*/100ms,
+                       InputEventInjectionSync::NONE,
+                       /*injectionTimeout=*/100ms,
                        /*allowKeyRepeat=*/false);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, result);
     // The key that was injected is blocking the dispatcher, so the navigation bar shouldn't be
@@ -10598,7 +10606,7 @@
     mWindow->consumeFocusEvent(true);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyDown(ui::ADISPLAY_ID_NONE);
 }
 
 // A focused & mirrored window remains focused only if the window and its mirror are both
@@ -10610,10 +10618,10 @@
     mWindow->consumeFocusEvent(true);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyUp(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyUp(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyUp(ui::ADISPLAY_ID_NONE);
 
     mMirror->setFocusable(false);
     mDispatcher->onWindowInfosChanged({{*mWindow->getInfo(), *mMirror->getInfo()}, {}, 0, 0});
@@ -10635,20 +10643,20 @@
     mWindow->consumeFocusEvent(true);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyUp(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyUp(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyUp(ui::ADISPLAY_ID_NONE);
 
     mMirror->setVisible(false);
     mDispatcher->onWindowInfosChanged({{*mWindow->getInfo(), *mMirror->getInfo()}, {}, 0, 0});
 
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyUp(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyUp(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyUp(ui::ADISPLAY_ID_NONE);
 
     mWindow->setVisible(false);
     mDispatcher->onWindowInfosChanged({{*mWindow->getInfo(), *mMirror->getInfo()}, {}, 0, 0});
@@ -10669,20 +10677,20 @@
     mWindow->consumeFocusEvent(true);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyDown(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyUp(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mWindow->consumeKeyUp(ADISPLAY_ID_NONE);
+    mWindow->consumeKeyUp(ui::ADISPLAY_ID_NONE);
 
     // single window is removed but the window token remains focused
     mDispatcher->onWindowInfosChanged({{*mMirror->getInfo()}, {}, 0, 0});
 
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mMirror->consumeKeyDown(ADISPLAY_ID_NONE);
+    mMirror->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyUp(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    mMirror->consumeKeyUp(ADISPLAY_ID_NONE);
+    mMirror->consumeKeyUp(ui::ADISPLAY_ID_NONE);
 
     // Both windows are removed
     mDispatcher->onWindowInfosChanged({{}, {}, 0, 0});
@@ -12489,11 +12497,11 @@
 
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    window->consumeKeyDown(ADISPLAY_ID_NONE);
+    window->consumeKeyDown(ui::ADISPLAY_ID_NONE);
 
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyUp(*mDispatcher))
             << "Inject key event should return InputEventInjectionResult::SUCCEEDED";
-    window->consumeKeyUp(ADISPLAY_ID_NONE);
+    window->consumeKeyUp(ui::ADISPLAY_ID_NONE);
 
     spy->assertNoEvents();
 }
@@ -13073,7 +13081,8 @@
     }
 
     InputEventInjectionResult injectTargetedKey(int32_t action) const {
-        return inputdispatcher::injectKey(*mDispatcher, action, /*repeatCount=*/0, ADISPLAY_ID_NONE,
+        return inputdispatcher::injectKey(*mDispatcher, action, /*repeatCount=*/0,
+                                          ui::ADISPLAY_ID_NONE,
                                           InputEventInjectionSync::WAIT_FOR_RESULT,
                                           INJECT_EVENT_TIMEOUT, /*allowKeyRepeat=*/false, {mUid},
                                           mPolicyFlags);
@@ -13105,7 +13114,7 @@
 
     EXPECT_EQ(InputEventInjectionResult::SUCCEEDED,
               owner.injectTargetedKey(AKEY_EVENT_ACTION_DOWN));
-    window->consumeKeyDown(ADISPLAY_ID_NONE);
+    window->consumeKeyDown(ui::ADISPLAY_ID_NONE);
 }
 
 TEST_F(InputDispatcherTargetedInjectionTest, CannotInjectIntoUnownedWindow) {
@@ -13178,7 +13187,7 @@
     randosSpy->consumeFocusEvent(true);
 
     EXPECT_EQ(InputEventInjectionResult::SUCCEEDED, injectKeyDown(*mDispatcher));
-    randosSpy->consumeKeyDown(ADISPLAY_ID_NONE);
+    randosSpy->consumeKeyDown(ui::ADISPLAY_ID_NONE);
     window->assertNoEvents();
 }
 
diff --git a/services/inputflinger/tests/InputMapperTest.cpp b/services/inputflinger/tests/InputMapperTest.cpp
index ae6c849..fea1349 100644
--- a/services/inputflinger/tests/InputMapperTest.cpp
+++ b/services/inputflinger/tests/InputMapperTest.cpp
@@ -172,8 +172,8 @@
     return device;
 }
 
-void InputMapperTest::setDisplayInfoAndReconfigure(int32_t displayId, int32_t width, int32_t height,
-                                                   ui::Rotation orientation,
+void InputMapperTest::setDisplayInfoAndReconfigure(ui::LogicalDisplayId displayId, int32_t width,
+                                                   int32_t height, ui::Rotation orientation,
                                                    const std::string& uniqueId,
                                                    std::optional<uint8_t> physicalPort,
                                                    ViewportType viewportType) {
diff --git a/services/inputflinger/tests/InputMapperTest.h b/services/inputflinger/tests/InputMapperTest.h
index 509a593..5bd8cda 100644
--- a/services/inputflinger/tests/InputMapperTest.h
+++ b/services/inputflinger/tests/InputMapperTest.h
@@ -128,7 +128,7 @@
                                                  args...);
     }
 
-    void setDisplayInfoAndReconfigure(int32_t displayId, int32_t width, int32_t height,
+    void setDisplayInfoAndReconfigure(ui::LogicalDisplayId displayId, int32_t width, int32_t height,
                                       ui::Rotation orientation, const std::string& uniqueId,
                                       std::optional<uint8_t> physicalPort,
                                       ViewportType viewportType);
diff --git a/services/inputflinger/tests/InputProcessorConverter_test.cpp b/services/inputflinger/tests/InputProcessorConverter_test.cpp
index 4b42f4b..1556532 100644
--- a/services/inputflinger/tests/InputProcessorConverter_test.cpp
+++ b/services/inputflinger/tests/InputProcessorConverter_test.cpp
@@ -17,7 +17,6 @@
 #include "../InputCommonConverter.h"
 
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <utils/BitSet.h>
 
 using namespace aidl::android::hardware::input;
@@ -39,7 +38,7 @@
     coords.setAxisValue(AMOTION_EVENT_AXIS_SIZE, 0.5);
     static constexpr nsecs_t downTime = 2;
     NotifyMotionArgs motionArgs(/*sequenceNum=*/1, /*eventTime=*/downTime, /*readTime=*/2,
-                                /*deviceId=*/3, AINPUT_SOURCE_ANY, ADISPLAY_ID_DEFAULT,
+                                /*deviceId=*/3, AINPUT_SOURCE_ANY, ui::ADISPLAY_ID_DEFAULT,
                                 /*policyFlags=*/4, AMOTION_EVENT_ACTION_DOWN, /*actionButton=*/0,
                                 /*flags=*/0, AMETA_NONE, /*buttonState=*/0,
                                 MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE,
diff --git a/services/inputflinger/tests/InputProcessor_test.cpp b/services/inputflinger/tests/InputProcessor_test.cpp
index 3b7cbfa..5606a91 100644
--- a/services/inputflinger/tests/InputProcessor_test.cpp
+++ b/services/inputflinger/tests/InputProcessor_test.cpp
@@ -16,7 +16,6 @@
 
 #include "../InputProcessor.h"
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 
 #include "TestInputListener.h"
 
@@ -45,7 +44,7 @@
     coords.setAxisValue(AMOTION_EVENT_AXIS_Y, 1);
     static constexpr nsecs_t downTime = 2;
     NotifyMotionArgs motionArgs(/*sequenceNum=*/1, /*eventTime=*/downTime, /*readTime=*/2,
-                                /*deviceId=*/3, AINPUT_SOURCE_ANY, ADISPLAY_ID_DEFAULT,
+                                /*deviceId=*/3, AINPUT_SOURCE_ANY, ui::ADISPLAY_ID_DEFAULT,
                                 /*policyFlags=*/4, AMOTION_EVENT_ACTION_DOWN, /*actionButton=*/0,
                                 /*flags=*/0, AMETA_NONE, /*buttonState=*/0,
                                 MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE,
@@ -81,7 +80,7 @@
 TEST_F(InputProcessorTest, SendToNextStage_NotifyKeyArgs) {
     // Create a basic key event and send to processor
     NotifyKeyArgs args(/*sequenceNum=*/1, /*eventTime=*/2, /*readTime=*/21, /*deviceId=*/3,
-                       AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_DEFAULT, /*policyFlags=*/0,
+                       AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_DEFAULT, /*policyFlags=*/0,
                        AKEY_EVENT_ACTION_DOWN, /*flags=*/4, AKEYCODE_HOME, /*scanCode=*/5,
                        AMETA_NONE, /*downTime=*/6);
 
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 92489ae..fcc52a8 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -40,7 +40,6 @@
 #include <com_android_input_flags.h>
 #include <ftl/enum.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <ui/Rotation.h>
 
 #include <thread>
@@ -60,13 +59,14 @@
 using std::chrono_literals::operator""s;
 
 // Arbitrary display properties.
-static constexpr int32_t DISPLAY_ID = 0;
+static constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
 static const std::string DISPLAY_UNIQUE_ID = "local:1";
-static constexpr int32_t SECONDARY_DISPLAY_ID = DISPLAY_ID + 1;
+static constexpr ui::LogicalDisplayId SECONDARY_DISPLAY_ID =
+        ui::LogicalDisplayId{DISPLAY_ID.val() + 1};
 static const std::string SECONDARY_DISPLAY_UNIQUE_ID = "local:2";
 static constexpr int32_t DISPLAY_WIDTH = 480;
 static constexpr int32_t DISPLAY_HEIGHT = 800;
-static constexpr int32_t VIRTUAL_DISPLAY_ID = 1;
+static constexpr ui::LogicalDisplayId VIRTUAL_DISPLAY_ID = ui::LogicalDisplayId{1};
 static constexpr int32_t VIRTUAL_DISPLAY_WIDTH = 400;
 static constexpr int32_t VIRTUAL_DISPLAY_HEIGHT = 500;
 static const char* VIRTUAL_DISPLAY_UNIQUE_ID = "virtual:1";
@@ -358,7 +358,7 @@
     virtual void fadePointer() {
     }
 
-    virtual std::optional<int32_t> getAssociatedDisplay() {
+    virtual std::optional<ui::LogicalDisplayId> getAssociatedDisplay() {
         if (mViewport) {
             return std::make_optional(mViewport->displayId);
         }
@@ -417,8 +417,8 @@
     const std::string externalUniqueId = "local:1";
     const std::string virtualUniqueId1 = "virtual:2";
     const std::string virtualUniqueId2 = "virtual:3";
-    constexpr int32_t virtualDisplayId1 = 2;
-    constexpr int32_t virtualDisplayId2 = 3;
+    constexpr ui::LogicalDisplayId virtualDisplayId1 = ui::LogicalDisplayId{2};
+    constexpr ui::LogicalDisplayId virtualDisplayId2 = ui::LogicalDisplayId{3};
 
     // Add an internal viewport
     mFakePolicy->addDisplayViewport(DISPLAY_ID, DISPLAY_WIDTH, DISPLAY_HEIGHT, ui::ROTATION_0,
@@ -475,8 +475,8 @@
 TEST_F(InputReaderPolicyTest, Viewports_TwoOfSameType) {
     const std::string uniqueId1 = "uniqueId1";
     const std::string uniqueId2 = "uniqueId2";
-    constexpr int32_t displayId1 = 2;
-    constexpr int32_t displayId2 = 3;
+    constexpr ui::LogicalDisplayId displayId1 = ui::LogicalDisplayId{2};
+    constexpr ui::LogicalDisplayId displayId2 = ui::LogicalDisplayId{3};
 
     std::vector<ViewportType> types = {ViewportType::INTERNAL, ViewportType::EXTERNAL,
                                        ViewportType::VIRTUAL};
@@ -520,13 +520,13 @@
 TEST_F(InputReaderPolicyTest, Viewports_ByTypeReturnsDefaultForInternal) {
     const std::string uniqueId1 = "uniqueId1";
     const std::string uniqueId2 = "uniqueId2";
-    constexpr int32_t nonDefaultDisplayId = 2;
-    static_assert(nonDefaultDisplayId != ADISPLAY_ID_DEFAULT,
-                  "Test display ID should not be ADISPLAY_ID_DEFAULT");
+    constexpr ui::LogicalDisplayId nonDefaultDisplayId = ui::LogicalDisplayId{2};
+    ASSERT_NE(nonDefaultDisplayId, ui::ADISPLAY_ID_DEFAULT)
+            << "Test display ID should not be ui::ADISPLAY_ID_DEFAULT ";
 
     // Add the default display first and ensure it gets returned.
     mFakePolicy->clearViewports();
-    mFakePolicy->addDisplayViewport(ADISPLAY_ID_DEFAULT, DISPLAY_WIDTH, DISPLAY_HEIGHT,
+    mFakePolicy->addDisplayViewport(ui::ADISPLAY_ID_DEFAULT, DISPLAY_WIDTH, DISPLAY_HEIGHT,
                                     ui::ROTATION_0, /*isActive=*/true, uniqueId1, NO_PORT,
                                     ViewportType::INTERNAL);
     mFakePolicy->addDisplayViewport(nonDefaultDisplayId, DISPLAY_WIDTH, DISPLAY_HEIGHT,
@@ -536,7 +536,7 @@
     std::optional<DisplayViewport> viewport =
             mFakePolicy->getDisplayViewportByType(ViewportType::INTERNAL);
     ASSERT_TRUE(viewport);
-    ASSERT_EQ(ADISPLAY_ID_DEFAULT, viewport->displayId);
+    ASSERT_EQ(ui::ADISPLAY_ID_DEFAULT, viewport->displayId);
     ASSERT_EQ(ViewportType::INTERNAL, viewport->type);
 
     // Add the default display second to make sure order doesn't matter.
@@ -544,13 +544,13 @@
     mFakePolicy->addDisplayViewport(nonDefaultDisplayId, DISPLAY_WIDTH, DISPLAY_HEIGHT,
                                     ui::ROTATION_0, /*isActive=*/true, uniqueId2, NO_PORT,
                                     ViewportType::INTERNAL);
-    mFakePolicy->addDisplayViewport(ADISPLAY_ID_DEFAULT, DISPLAY_WIDTH, DISPLAY_HEIGHT,
+    mFakePolicy->addDisplayViewport(ui::ADISPLAY_ID_DEFAULT, DISPLAY_WIDTH, DISPLAY_HEIGHT,
                                     ui::ROTATION_0, /*isActive=*/true, uniqueId1, NO_PORT,
                                     ViewportType::INTERNAL);
 
     viewport = mFakePolicy->getDisplayViewportByType(ViewportType::INTERNAL);
     ASSERT_TRUE(viewport);
-    ASSERT_EQ(ADISPLAY_ID_DEFAULT, viewport->displayId);
+    ASSERT_EQ(ui::ADISPLAY_ID_DEFAULT, viewport->displayId);
     ASSERT_EQ(ViewportType::INTERNAL, viewport->type);
 }
 
@@ -561,8 +561,8 @@
     constexpr ViewportType type = ViewportType::EXTERNAL;
     const std::string uniqueId1 = "uniqueId1";
     const std::string uniqueId2 = "uniqueId2";
-    constexpr int32_t displayId1 = 1;
-    constexpr int32_t displayId2 = 2;
+    constexpr ui::LogicalDisplayId displayId1 = ui::LogicalDisplayId{1};
+    constexpr ui::LogicalDisplayId displayId2 = ui::LogicalDisplayId{2};
     const uint8_t hdmi1 = 0;
     const uint8_t hdmi2 = 1;
     const uint8_t hdmi3 = 2;
@@ -1598,7 +1598,7 @@
         mDeviceInfo = *info;
     }
 
-    void setDisplayInfoAndReconfigure(int32_t displayId, int32_t width, int32_t height,
+    void setDisplayInfoAndReconfigure(ui::LogicalDisplayId displayId, int32_t width, int32_t height,
                                       ui::Rotation orientation, const std::string& uniqueId,
                                       std::optional<uint8_t> physicalPort,
                                       ViewportType viewportType) {
@@ -3244,7 +3244,7 @@
 
     void testDPadKeyRotation(KeyboardInputMapper& mapper, int32_t originalScanCode,
                              int32_t originalKeyCode, int32_t rotatedKeyCode,
-                             int32_t displayId = ADISPLAY_ID_NONE);
+                             ui::LogicalDisplayId displayId = ui::ADISPLAY_ID_NONE);
 };
 
 /* Similar to setDisplayInfoAndReconfigure, but pre-populates all parameters except for the
@@ -3257,7 +3257,8 @@
 
 void KeyboardInputMapperTest::testDPadKeyRotation(KeyboardInputMapper& mapper,
                                                   int32_t originalScanCode, int32_t originalKeyCode,
-                                                  int32_t rotatedKeyCode, int32_t displayId) {
+                                                  int32_t rotatedKeyCode,
+                                                  ui::LogicalDisplayId displayId) {
     NotifyKeyArgs args;
 
     process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, originalScanCode, 1);
@@ -3583,14 +3584,14 @@
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
-    ASSERT_EQ(ADISPLAY_ID_NONE, args.displayId);
+    ASSERT_EQ(ui::ADISPLAY_ID_NONE, args.displayId);
 
     prepareDisplay(ui::ROTATION_0);
     process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
-    ASSERT_EQ(ADISPLAY_ID_NONE, args.displayId);
+    ASSERT_EQ(ui::ADISPLAY_ID_NONE, args.displayId);
 }
 
 TEST_F(KeyboardInputMapperTest, DisplayIdConfigurationChange_OrientationAware) {
@@ -3615,7 +3616,7 @@
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DISPLAY_ID, args.displayId);
 
-    constexpr int32_t newDisplayId = 2;
+    constexpr ui::LogicalDisplayId newDisplayId = ui::LogicalDisplayId{2};
     clearViewports();
     setDisplayInfoAndReconfigure(newDisplayId, DISPLAY_WIDTH, DISPLAY_HEIGHT, ui::ROTATION_0,
                                  UNIQUE_ID, NO_PORT, ViewportType::INTERNAL);
@@ -3830,7 +3831,7 @@
     ASSERT_FALSE(device2->isEnabled());
 
     // Prepare second display.
-    constexpr int32_t newDisplayId = 2;
+    constexpr ui::LogicalDisplayId newDisplayId = ui::LogicalDisplayId{2};
     setDisplayInfoAndReconfigure(DISPLAY_ID, DISPLAY_WIDTH, DISPLAY_HEIGHT, ui::ROTATION_0,
                                  UNIQUE_ID, hdmi1, ViewportType::INTERNAL);
     setDisplayInfoAndReconfigure(newDisplayId, DISPLAY_WIDTH, DISPLAY_HEIGHT, ui::ROTATION_0,
@@ -8674,7 +8675,7 @@
 
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, motionArgs.action);
-    ASSERT_EQ(ADISPLAY_ID_NONE, motionArgs.displayId);
+    ASSERT_EQ(ui::ADISPLAY_ID_NONE, motionArgs.displayId);
 }
 
 /**
@@ -9571,7 +9572,7 @@
     processPosition(mapper, 100, 100);
     processSync(mapper);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
-    ASSERT_EQ(ADISPLAY_ID_DEFAULT, motionArgs.displayId);
+    ASSERT_EQ(ui::ADISPLAY_ID_DEFAULT, motionArgs.displayId);
 
     // Expect the event to be sent to the external viewport if it is present.
     prepareSecondaryDisplay(ViewportType::EXTERNAL);
diff --git a/services/inputflinger/tests/InputTracingTest.cpp b/services/inputflinger/tests/InputTracingTest.cpp
index 0404d6d..dfbbce3 100644
--- a/services/inputflinger/tests/InputTracingTest.cpp
+++ b/services/inputflinger/tests/InputTracingTest.cpp
@@ -41,7 +41,7 @@
 
 namespace {
 
-constexpr int32_t DISPLAY_ID = ADISPLAY_ID_DEFAULT;
+constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
 
 // Ensure common actions are interchangeable between keys and motions for convenience.
 static_assert(static_cast<int32_t>(AMOTION_EVENT_ACTION_DOWN) ==
@@ -127,7 +127,7 @@
         request.token = window->getToken();
         request.windowName = window->getName();
         request.timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
-        request.displayId = window->getInfo()->displayId;
+        request.displayId = window->getInfo()->displayId.val();
         mDispatcher->setFocusedWindow(request);
     }
 
diff --git a/services/inputflinger/tests/LatencyTracker_test.cpp b/services/inputflinger/tests/LatencyTracker_test.cpp
index 6606de8..01fd03e 100644
--- a/services/inputflinger/tests/LatencyTracker_test.cpp
+++ b/services/inputflinger/tests/LatencyTracker_test.cpp
@@ -20,7 +20,6 @@
 #include <android-base/properties.h>
 #include <binder/Binder.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <inttypes.h>
 #include <linux/input.h>
 #include <log/log.h>
@@ -44,7 +43,7 @@
     identifier.product = productId;
     auto info = InputDeviceInfo();
     info.initialize(deviceId, /*generation=*/1, /*controllerNumber=*/1, identifier, "Test Device",
-                    /*isExternal=*/false, /*hasMic=*/false, ADISPLAY_ID_NONE);
+                    /*isExternal=*/false, /*hasMic=*/false, ui::ADISPLAY_ID_NONE);
     return info;
 }
 
diff --git a/services/inputflinger/tests/MultiTouchInputMapper_test.cpp b/services/inputflinger/tests/MultiTouchInputMapper_test.cpp
index d726385..437020f 100644
--- a/services/inputflinger/tests/MultiTouchInputMapper_test.cpp
+++ b/services/inputflinger/tests/MultiTouchInputMapper_test.cpp
@@ -35,7 +35,7 @@
 using testing::SetArgPointee;
 using testing::VariantWith;
 
-static constexpr int32_t DISPLAY_ID = 0;
+static constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
 static constexpr int32_t DISPLAY_WIDTH = 480;
 static constexpr int32_t DISPLAY_HEIGHT = 800;
 static constexpr std::optional<uint8_t> NO_PORT = std::nullopt; // no physical port is specified
diff --git a/services/inputflinger/tests/NotifyArgs_test.cpp b/services/inputflinger/tests/NotifyArgs_test.cpp
index 1536756..2e5ecc3 100644
--- a/services/inputflinger/tests/NotifyArgs_test.cpp
+++ b/services/inputflinger/tests/NotifyArgs_test.cpp
@@ -36,7 +36,7 @@
     nsecs_t readTime = downTime++;
     int32_t deviceId = 7;
     uint32_t source = AINPUT_SOURCE_TOUCHSCREEN;
-    int32_t displayId = 42;
+    ui::LogicalDisplayId displayId = ui::LogicalDisplayId{42};
     uint32_t policyFlags = POLICY_FLAG_GESTURE;
     int32_t action = AMOTION_EVENT_ACTION_HOVER_MOVE;
     int32_t actionButton = AMOTION_EVENT_BUTTON_PRIMARY;
diff --git a/services/inputflinger/tests/PointerChoreographer_test.cpp b/services/inputflinger/tests/PointerChoreographer_test.cpp
index d81f8a0..33e7277 100644
--- a/services/inputflinger/tests/PointerChoreographer_test.cpp
+++ b/services/inputflinger/tests/PointerChoreographer_test.cpp
@@ -46,8 +46,8 @@
 constexpr int32_t DEVICE_ID = 3;
 constexpr int32_t SECOND_DEVICE_ID = DEVICE_ID + 1;
 constexpr int32_t THIRD_DEVICE_ID = SECOND_DEVICE_ID + 1;
-constexpr int32_t DISPLAY_ID = 5;
-constexpr int32_t ANOTHER_DISPLAY_ID = 10;
+constexpr ui::LogicalDisplayId DISPLAY_ID = ui::LogicalDisplayId{5};
+constexpr ui::LogicalDisplayId ANOTHER_DISPLAY_ID = ui::LogicalDisplayId{10};
 constexpr int32_t DISPLAY_WIDTH = 480;
 constexpr int32_t DISPLAY_HEIGHT = 800;
 constexpr auto DRAWING_TABLET_SOURCE = AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_STYLUS;
@@ -63,7 +63,7 @@
                                       .axis(AMOTION_EVENT_AXIS_RELATIVE_Y, 20);
 
 static InputDeviceInfo generateTestDeviceInfo(int32_t deviceId, uint32_t source,
-                                              int32_t associatedDisplayId) {
+                                              ui::LogicalDisplayId associatedDisplayId) {
     InputDeviceIdentifier identifier;
 
     auto info = InputDeviceInfo();
@@ -73,7 +73,7 @@
     return info;
 }
 
-static std::vector<DisplayViewport> createViewports(std::vector<int32_t> displayIds) {
+static std::vector<DisplayViewport> createViewports(std::vector<ui::LogicalDisplayId> displayIds) {
     std::vector<DisplayViewport> viewports;
     for (auto displayId : displayIds) {
         DisplayViewport viewport;
@@ -124,7 +124,7 @@
                                         "reference to this PointerController";
     }
 
-    void assertPointerDisplayIdNotified(int32_t displayId) {
+    void assertPointerDisplayIdNotified(ui::LogicalDisplayId displayId) {
         ASSERT_EQ(displayId, mPointerDisplayIdNotified);
         mPointerDisplayIdNotified.reset();
     }
@@ -134,7 +134,7 @@
 private:
     std::deque<std::pair<ControllerType, std::shared_ptr<FakePointerController>>>
             mCreatedControllers;
-    std::optional<int32_t> mPointerDisplayIdNotified;
+    std::optional<ui::LogicalDisplayId> mPointerDisplayIdNotified;
 
     std::shared_ptr<PointerControllerInterface> createPointerController(
             ControllerType type) override {
@@ -144,7 +144,8 @@
         return pc;
     }
 
-    void notifyPointerDisplayIdChanged(int32_t displayId, const FloatPoint& position) override {
+    void notifyPointerDisplayIdChanged(ui::LogicalDisplayId displayId,
+                                       const FloatPoint& position) override {
         mPointerDisplayIdNotified = displayId;
     }
 };
@@ -201,13 +202,15 @@
 
 TEST_F(PointerChoreographerTest, WhenMouseIsAddedCreatesPointerController) {
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerCreated(ControllerType::MOUSE);
 }
 
 TEST_F(PointerChoreographerTest, WhenMouseIsRemovedRemovesPointerController) {
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
 
     // Remove the mouse.
@@ -218,7 +221,7 @@
 TEST_F(PointerChoreographerTest, WhenKeyboardIsAddedDoesNotCreatePointerController) {
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerNotCreated();
 }
 
@@ -252,7 +255,8 @@
     // For a mouse event without a target display, default viewport should be set for
     // the PointerController.
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     pc->assertViewportSet(DISPLAY_ID);
     ASSERT_TRUE(pc->isPointerShown());
@@ -264,7 +268,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID, ANOTHER_DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto firstDisplayPc = assertPointerControllerCreated(ControllerType::MOUSE);
     firstDisplayPc->assertViewportSet(DISPLAY_ID);
     ASSERT_TRUE(firstDisplayPc->isPointerShown());
@@ -283,7 +288,8 @@
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerCreated(ControllerType::MOUSE);
 
     assertPointerDisplayIdNotified(DISPLAY_ID);
@@ -292,7 +298,8 @@
 TEST_F(PointerChoreographerTest, WhenViewportIsSetLaterCallsNotifyPointerDisplayIdChanged) {
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerCreated(ControllerType::MOUSE);
     assertPointerDisplayIdNotNotified();
 
@@ -304,12 +311,13 @@
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     assertPointerDisplayIdNotified(DISPLAY_ID);
 
     mChoreographer.notifyInputDevicesChanged({/*id=*/1, {}});
-    assertPointerDisplayIdNotified(ADISPLAY_ID_NONE);
+    assertPointerDisplayIdNotified(ui::ADISPLAY_ID_NONE);
     assertPointerControllerRemoved(pc);
 }
 
@@ -320,7 +328,8 @@
     // Set one viewport as a default mouse display ID.
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto firstDisplayPc = assertPointerControllerCreated(ControllerType::MOUSE);
     assertPointerDisplayIdNotified(DISPLAY_ID);
 
@@ -336,7 +345,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
 
@@ -348,7 +358,7 @@
             MotionArgsBuilder(AMOTION_EVENT_ACTION_HOVER_MOVE, AINPUT_SOURCE_MOUSE)
                     .pointer(MOUSE_POINTER)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
 
     // Check that the PointerController updated the position and the pointer is shown.
@@ -364,7 +374,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
 
@@ -379,7 +390,7 @@
             MotionArgsBuilder(AMOTION_EVENT_ACTION_HOVER_MOVE, AINPUT_SOURCE_MOUSE)
                     .pointer(absoluteMousePointer)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
 
     // Check that the PointerController updated the position and the pointer is shown.
@@ -401,7 +412,7 @@
     // Add two devices, one unassociated and the other associated with non-default mouse display.
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE),
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE),
               generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ANOTHER_DISPLAY_ID)}});
     auto unassociatedMousePc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, unassociatedMousePc->getDisplayId());
@@ -437,7 +448,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
 
@@ -447,7 +459,8 @@
     // Assume that pointer capture is enabled.
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/1,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE_RELATIVE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE_RELATIVE,
+                                     ui::ADISPLAY_ID_NONE)}});
     mChoreographer.notifyPointerCaptureChanged(
             NotifyPointerCaptureChangedArgs(/*id=*/2, systemTime(SYSTEM_TIME_MONOTONIC),
                                             PointerCaptureRequest(/*window=*/sp<BBinder>::make(),
@@ -462,7 +475,7 @@
                                      .axis(AMOTION_EVENT_AXIS_RELATIVE_X, 10)
                                      .axis(AMOTION_EVENT_AXIS_RELATIVE_Y, 20))
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
 
     // Check that there's no update on the PointerController.
@@ -471,7 +484,8 @@
 
     // Check x-y coordinates, displayId and cursor position are not changed.
     mTestListener.assertNotifyMotionWasCalled(
-            AllOf(WithCoords(10, 20), WithRelativeMotion(10, 20), WithDisplayId(ADISPLAY_ID_NONE),
+            AllOf(WithCoords(10, 20), WithRelativeMotion(10, 20),
+                  WithDisplayId(ui::ADISPLAY_ID_NONE),
                   WithCursorPosition(AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                      AMOTION_EVENT_INVALID_CURSOR_POSITION)));
 }
@@ -480,7 +494,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
     ASSERT_TRUE(pc->isPointerShown());
@@ -499,7 +514,8 @@
 
     // A mouse is connected, and the pointer is shown.
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
 
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_TRUE(pc->isPointerShown());
@@ -509,15 +525,17 @@
     // Add a second mouse is added, the pointer is shown again.
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE),
-              generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE),
+              generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE,
+                                     ui::ADISPLAY_ID_NONE)}});
     ASSERT_TRUE(pc->isPointerShown());
 
     // One of the mice is removed, and it does not cause the mouse pointer to fade, because
     // we have one more mouse connected.
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE,
+                                     ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerNotRemoved(pc);
     ASSERT_TRUE(pc->isPointerShown());
 
@@ -530,7 +548,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
 
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_TRUE(pc->isPointerShown());
@@ -540,7 +559,7 @@
     // Adding a touchscreen device does not unfade the mouse pointer.
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE),
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE),
               generateTestDeviceInfo(SECOND_DEVICE_ID,
                                      AINPUT_SOURCE_TOUCHSCREEN | AINPUT_SOURCE_STYLUS,
                                      DISPLAY_ID)}});
@@ -557,7 +576,7 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     InputDeviceInfo mouseDeviceInfo =
-            generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE);
+            generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE);
     // Disable this mouse device.
     mouseDeviceInfo.setEnabled(false);
     mChoreographer.notifyInputDevicesChanged({/*id=*/0, {mouseDeviceInfo}});
@@ -570,7 +589,7 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     InputDeviceInfo mouseDeviceInfo =
-            generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE);
+            generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE);
 
     mChoreographer.notifyInputDevicesChanged({/*id=*/0, {mouseDeviceInfo}});
 
@@ -589,14 +608,14 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     InputDeviceInfo disabledMouseDeviceInfo =
-            generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE);
+            generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE);
     disabledMouseDeviceInfo.setEnabled(false);
 
     InputDeviceInfo enabledMouseDeviceInfo =
-            generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE);
+            generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE);
 
     InputDeviceInfo anotherEnabledMouseDeviceInfo =
-            generateTestDeviceInfo(THIRD_DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE);
+            generateTestDeviceInfo(THIRD_DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE);
 
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
@@ -1158,7 +1177,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerCreated(ControllerType::MOUSE);
 }
 
@@ -1166,7 +1185,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
 
     // Remove the touchpad.
@@ -1207,7 +1226,8 @@
     // For a touchpad event without a target display, default viewport should be set for
     // the PointerController.
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     pc->assertViewportSet(DISPLAY_ID);
 }
@@ -1220,7 +1240,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto firstDisplayPc = assertPointerControllerCreated(ControllerType::MOUSE);
     firstDisplayPc->assertViewportSet(DISPLAY_ID);
 
@@ -1238,7 +1258,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerCreated(ControllerType::MOUSE);
 
     assertPointerDisplayIdNotified(DISPLAY_ID);
@@ -1249,7 +1269,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerCreated(ControllerType::MOUSE);
     assertPointerDisplayIdNotNotified();
 
@@ -1263,12 +1283,12 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     assertPointerDisplayIdNotified(DISPLAY_ID);
 
     mChoreographer.notifyInputDevicesChanged({/*id=*/1, {}});
-    assertPointerDisplayIdNotified(ADISPLAY_ID_NONE);
+    assertPointerDisplayIdNotified(ui::ADISPLAY_ID_NONE);
     assertPointerControllerRemoved(pc);
 }
 
@@ -1282,11 +1302,11 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto firstDisplayPc = assertPointerControllerCreated(ControllerType::MOUSE);
     assertPointerDisplayIdNotified(DISPLAY_ID);
 
-    // Set another viewport as a default mouse display ID. ADISPLAY_ID_NONE will be notified
+    // Set another viewport as a default mouse display ID. ui::ADISPLAY_ID_NONE will be notified
     // before a touchpad event.
     mChoreographer.setDefaultMouseDisplayId(ANOTHER_DISPLAY_ID);
     assertPointerControllerRemoved(firstDisplayPc);
@@ -1301,7 +1321,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
 
@@ -1313,7 +1333,7 @@
             MotionArgsBuilder(AMOTION_EVENT_ACTION_HOVER_MOVE, AINPUT_SOURCE_MOUSE)
                     .pointer(TOUCHPAD_POINTER)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
 
     // Check that the PointerController updated the position and the pointer is shown.
@@ -1331,7 +1351,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
 
@@ -1345,7 +1365,7 @@
                     .pointer(PointerBuilder(/*id=*/0, ToolType::FINGER).x(-100).y(0))
                     .classification(MotionClassification::MULTI_FINGER_SWIPE)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
     mTestListener.assertNotifyMotionWasCalled(
             AllOf(WithMotionAction(AMOTION_EVENT_ACTION_DOWN),
@@ -1359,7 +1379,7 @@
                     .pointer(PointerBuilder(/*id=*/1, ToolType::FINGER).x(0).y(0))
                     .classification(MotionClassification::MULTI_FINGER_SWIPE)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
     mTestListener.assertNotifyMotionWasCalled(
             AllOf(WithMotionAction(AMOTION_EVENT_ACTION_POINTER_DOWN |
@@ -1376,7 +1396,7 @@
                     .pointer(PointerBuilder(/*id=*/2, ToolType::FINGER).x(100).y(0))
                     .classification(MotionClassification::MULTI_FINGER_SWIPE)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
     mTestListener.assertNotifyMotionWasCalled(
             AllOf(WithMotionAction(AMOTION_EVENT_ACTION_POINTER_DOWN |
@@ -1391,7 +1411,7 @@
                     .pointer(PointerBuilder(/*id=*/2, ToolType::FINGER).x(110).y(10))
                     .classification(MotionClassification::MULTI_FINGER_SWIPE)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
     mTestListener.assertNotifyMotionWasCalled(
             AllOf(WithMotionAction(AMOTION_EVENT_ACTION_MOVE),
@@ -1410,7 +1430,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE),
+                                     ui::ADISPLAY_ID_NONE),
               generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
                                      ANOTHER_DISPLAY_ID)}});
     auto unassociatedMousePc = assertPointerControllerCreated(ControllerType::MOUSE);
@@ -1449,7 +1469,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
 
@@ -1466,7 +1486,7 @@
     mChoreographer.notifyMotion(MotionArgsBuilder(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHPAD)
                                         .pointer(FIRST_TOUCH_POINTER)
                                         .deviceId(DEVICE_ID)
-                                        .displayId(ADISPLAY_ID_NONE)
+                                        .displayId(ui::ADISPLAY_ID_NONE)
                                         .build());
 
     // Check that there's no update on the PointerController.
@@ -1475,7 +1495,7 @@
 
     // Check x-y coordinates, displayId and cursor position are not changed.
     mTestListener.assertNotifyMotionWasCalled(
-            AllOf(WithCoords(100, 200), WithDisplayId(ADISPLAY_ID_NONE),
+            AllOf(WithCoords(100, 200), WithDisplayId(ui::ADISPLAY_ID_NONE),
                   WithCursorPosition(AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                      AMOTION_EVENT_INVALID_CURSOR_POSITION)));
 }
@@ -1486,7 +1506,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, pc->getDisplayId());
     ASSERT_TRUE(pc->isPointerShown());
@@ -1504,7 +1524,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     pc->assertPointerIconNotSet();
 
@@ -1518,7 +1539,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     pc->assertPointerIconNotSet();
 
@@ -1533,7 +1555,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     pc->assertPointerIconNotSet();
 
@@ -1548,7 +1571,8 @@
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     pc->assertCustomPointerIconNotSet();
 
@@ -1571,7 +1595,7 @@
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE),
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE),
               generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ANOTHER_DISPLAY_ID)}});
     auto firstMousePc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, firstMousePc->getDisplayId());
@@ -1766,14 +1790,14 @@
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE),
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE),
               generateTestDeviceInfo(SECOND_DEVICE_ID, source, DISPLAY_ID)}});
     mChoreographer.setDisplayViewports(createViewports({DISPLAY_ID}));
     mChoreographer.notifyMotion(
             MotionArgsBuilder(AMOTION_EVENT_ACTION_HOVER_MOVE, AINPUT_SOURCE_MOUSE)
                     .pointer(MOUSE_POINTER)
                     .deviceId(DEVICE_ID)
-                    .displayId(ADISPLAY_ID_NONE)
+                    .displayId(ui::ADISPLAY_ID_NONE)
                     .build());
     auto mousePc = assertPointerControllerCreated(ControllerType::MOUSE);
     mChoreographer.notifyMotion(MotionArgsBuilder(AMOTION_EVENT_ACTION_HOVER_ENTER, source)
@@ -1801,7 +1825,7 @@
     mChoreographer.setDefaultMouseDisplayId(DISPLAY_ID);
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE),
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE),
               generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ANOTHER_DISPLAY_ID)}});
     auto firstMousePc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, firstMousePc->getDisplayId());
@@ -1857,7 +1881,8 @@
     // Hide the pointer on the display, and then connect the mouse.
     mChoreographer.setPointerIconVisibility(DISPLAY_ID, false);
     mChoreographer.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+            {/*id=*/0,
+             {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE, ui::ADISPLAY_ID_NONE)}});
     auto mousePc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, mousePc->getDisplayId());
 
@@ -1875,7 +1900,7 @@
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
              {generateTestDeviceInfo(DEVICE_ID, AINPUT_SOURCE_MOUSE | AINPUT_SOURCE_TOUCHPAD,
-                                     ADISPLAY_ID_NONE)}});
+                                     ui::ADISPLAY_ID_NONE)}});
     auto touchpadPc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_EQ(DISPLAY_ID, touchpadPc->getDisplayId());
 
@@ -1920,7 +1945,7 @@
 
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ui::ADISPLAY_ID_NONE)}});
     // There should be no controller created when a drawing tablet is connected
     assertPointerControllerNotCreated();
 
@@ -1947,7 +1972,7 @@
     // First drawing tablet is added
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerNotCreated();
 
     mChoreographer.notifyMotion(
@@ -1962,8 +1987,9 @@
     // Second drawing tablet is added
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE),
-              generateTestDeviceInfo(SECOND_DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ui::ADISPLAY_ID_NONE),
+              generateTestDeviceInfo(SECOND_DEVICE_ID, DRAWING_TABLET_SOURCE,
+                                     ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerNotRemoved(pc);
 
     mChoreographer.notifyMotion(
@@ -1976,7 +2002,7 @@
     // First drawing tablet is removed
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ui::ADISPLAY_ID_NONE)}});
     assertPointerControllerNotRemoved(pc);
 
     // Second drawing tablet is removed
@@ -1991,8 +2017,9 @@
     // Mouse and drawing tablet connected
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE),
-              generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ui::ADISPLAY_ID_NONE),
+              generateTestDeviceInfo(SECOND_DEVICE_ID, AINPUT_SOURCE_MOUSE,
+                                     ui::ADISPLAY_ID_NONE)}});
     auto pc = assertPointerControllerCreated(ControllerType::MOUSE);
     ASSERT_TRUE(pc->isPointerShown());
 
@@ -2007,7 +2034,7 @@
     // Remove the mouse device
     mChoreographer.notifyInputDevicesChanged(
             {/*id=*/0,
-             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ADISPLAY_ID_NONE)}});
+             {generateTestDeviceInfo(DEVICE_ID, DRAWING_TABLET_SOURCE, ui::ADISPLAY_ID_NONE)}});
 
     // The mouse controller should not be removed, because the drawing tablet has produced a
     // mouse event, so we are treating it as a mouse too.
diff --git a/services/inputflinger/tests/PreferStylusOverTouch_test.cpp b/services/inputflinger/tests/PreferStylusOverTouch_test.cpp
index 9818176..c273e92 100644
--- a/services/inputflinger/tests/PreferStylusOverTouch_test.cpp
+++ b/services/inputflinger/tests/PreferStylusOverTouch_test.cpp
@@ -15,7 +15,6 @@
  */
 
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include "../PreferStylusOverTouchBlocker.h"
 
 namespace android {
@@ -64,8 +63,9 @@
     }
 
     // Define a valid motion event.
-    NotifyMotionArgs args(/*id=*/0, eventTime, /*readTime=*/0, deviceId, source, /*displayId=*/0,
-                          POLICY_FLAG_PASS_TO_USER, action, /* actionButton */ 0,
+    NotifyMotionArgs args(/*id=*/0, eventTime, /*readTime=*/0, deviceId, source,
+                          /*displayId=*/ui::ADISPLAY_ID_DEFAULT, POLICY_FLAG_PASS_TO_USER, action,
+                          /* actionButton */ 0,
                           /*flags=*/0, AMETA_NONE, /*buttonState=*/0, MotionClassification::NONE,
                           AMOTION_EVENT_EDGE_FLAG_NONE, pointerCount, pointerProperties,
                           pointerCoords, /*xPrecision=*/0, /*yPrecision=*/0,
@@ -439,7 +439,7 @@
     InputDeviceInfo stylusDevice;
     stylusDevice.initialize(STYLUS_DEVICE_ID, /*generation=*/1, /*controllerNumber=*/1,
                             /*identifier=*/{}, "stylus device", /*external=*/false,
-                            /*hasMic=*/false, ADISPLAY_ID_NONE);
+                            /*hasMic=*/false, ui::ADISPLAY_ID_NONE);
     notifyInputDevicesChanged({stylusDevice});
     // The touchscreen device was removed, so we no longer remember anything about it. We should
     // again start blocking touch events from it.
diff --git a/services/inputflinger/tests/TestEventMatchers.h b/services/inputflinger/tests/TestEventMatchers.h
index a3e8eaf..65fb9c6 100644
--- a/services/inputflinger/tests/TestEventMatchers.h
+++ b/services/inputflinger/tests/TestEventMatchers.h
@@ -145,7 +145,7 @@
 class WithDisplayIdMatcher {
 public:
     using is_gtest_matcher = void;
-    explicit WithDisplayIdMatcher(int32_t displayId) : mDisplayId(displayId) {}
+    explicit WithDisplayIdMatcher(ui::LogicalDisplayId displayId) : mDisplayId(displayId) {}
 
     bool MatchAndExplain(const NotifyMotionArgs& args, std::ostream*) const {
         return mDisplayId == args.displayId;
@@ -164,10 +164,10 @@
     void DescribeNegationTo(std::ostream* os) const { *os << "wrong display id"; }
 
 private:
-    const int32_t mDisplayId;
+    const ui::LogicalDisplayId mDisplayId;
 };
 
-inline WithDisplayIdMatcher WithDisplayId(int32_t displayId) {
+inline WithDisplayIdMatcher WithDisplayId(ui::LogicalDisplayId displayId) {
     return WithDisplayIdMatcher(displayId);
 }
 
diff --git a/services/inputflinger/tests/TouchpadInputMapper_test.cpp b/services/inputflinger/tests/TouchpadInputMapper_test.cpp
index 402654c..245497c 100644
--- a/services/inputflinger/tests/TouchpadInputMapper_test.cpp
+++ b/services/inputflinger/tests/TouchpadInputMapper_test.cpp
@@ -37,7 +37,7 @@
 constexpr auto HOVER_MOVE = AMOTION_EVENT_ACTION_HOVER_MOVE;
 constexpr auto HOVER_ENTER = AMOTION_EVENT_ACTION_HOVER_ENTER;
 constexpr auto HOVER_EXIT = AMOTION_EVENT_ACTION_HOVER_EXIT;
-constexpr int32_t DISPLAY_ID = 0;
+constexpr ui::LogicalDisplayId DISPLAY_ID = ui::ADISPLAY_ID_DEFAULT;
 constexpr int32_t DISPLAY_WIDTH = 480;
 constexpr int32_t DISPLAY_HEIGHT = 800;
 constexpr std::optional<uint8_t> NO_PORT = std::nullopt; // no physical port is specified
diff --git a/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp b/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp
index 78f7291..80430d1 100644
--- a/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp
+++ b/services/inputflinger/tests/UnwantedInteractionBlocker_test.cpp
@@ -18,7 +18,6 @@
 #include <android-base/silent_death_test.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
-#include <gui/constants.h>
 #include <linux/input.h>
 #include <thread>
 #include "ui/events/ozone/evdev/touch_filter/neural_stylus_palm_detection_filter.h"
@@ -89,7 +88,8 @@
 
     // Define a valid motion event.
     NotifyMotionArgs args(/*id=*/0, eventTime, /*readTime=*/0, DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-                          /*displayId=*/0, POLICY_FLAG_PASS_TO_USER, action, /*actionButton=*/0,
+                          /*displayId=*/ui::ADISPLAY_ID_DEFAULT, POLICY_FLAG_PASS_TO_USER, action,
+                          /*actionButton=*/0,
                           /*flags=*/0, AMETA_NONE, /*buttonState=*/0, MotionClassification::NONE,
                           AMOTION_EVENT_EDGE_FLAG_NONE, pointerCount, pointerProperties,
                           pointerCoords, /*xPrecision=*/0, /*yPrecision=*/0,
@@ -104,7 +104,7 @@
 
     auto info = InputDeviceInfo();
     info.initialize(DEVICE_ID, /*generation=*/1, /*controllerNumber=*/1, identifier, "alias",
-                    /*isExternal=*/false, /*hasMic=*/false, ADISPLAY_ID_NONE);
+                    /*isExternal=*/false, /*hasMic=*/false, ui::ADISPLAY_ID_NONE);
     info.addSource(AINPUT_SOURCE_TOUCHSCREEN);
     info.addMotionRange(AMOTION_EVENT_AXIS_X, AINPUT_SOURCE_TOUCHSCREEN, 0, 1599, /*flat=*/0,
                         /*fuzz=*/0, X_RESOLUTION);
@@ -434,7 +434,7 @@
 TEST_F(UnwantedInteractionBlockerTest, KeyIsPassedToNextListener) {
     // Create a basic key event and send to blocker
     NotifyKeyArgs args(/*sequenceNum=*/1, /*eventTime=*/2, /*readTime=*/21, /*deviceId=*/3,
-                       AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_DEFAULT, /*policyFlags=*/0,
+                       AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_DEFAULT, /*policyFlags=*/0,
                        AKEY_EVENT_ACTION_DOWN, /*flags=*/4, AKEYCODE_HOME, /*scanCode=*/5,
                        AMETA_NONE, /*downTime=*/6);
 
diff --git a/services/inputflinger/tests/fuzzers/FuzzedInputStream.h b/services/inputflinger/tests/fuzzers/FuzzedInputStream.h
index 885820f..812969b 100644
--- a/services/inputflinger/tests/fuzzers/FuzzedInputStream.h
+++ b/services/inputflinger/tests/fuzzers/FuzzedInputStream.h
@@ -178,7 +178,7 @@
         pointerCoords.push_back(coords);
     }
 
-    const int32_t displayId = fdp.ConsumeIntegralInRange<int32_t>(0, maxDisplays - 1);
+    const ui::LogicalDisplayId displayId{fdp.ConsumeIntegralInRange<int32_t>(0, maxDisplays - 1)};
     const int32_t deviceId = fdp.ConsumeIntegralInRange<int32_t>(0, MAX_RANDOM_DEVICES - 1);
 
     // Current time +- 5 seconds
diff --git a/services/inputflinger/tests/fuzzers/InputClassifierFuzzer.cpp b/services/inputflinger/tests/fuzzers/InputClassifierFuzzer.cpp
index deb811d..0446d76 100644
--- a/services/inputflinger/tests/fuzzers/InputClassifierFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/InputClassifierFuzzer.cpp
@@ -54,7 +54,7 @@
                     mClassifier->notifyKey({/*sequenceNum=*/fdp.ConsumeIntegral<int32_t>(),
                                             eventTime, readTime,
                                             /*deviceId=*/fdp.ConsumeIntegral<int32_t>(),
-                                            AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_DEFAULT,
+                                            AINPUT_SOURCE_KEYBOARD, ui::ADISPLAY_ID_DEFAULT,
                                             /*policyFlags=*/fdp.ConsumeIntegral<uint32_t>(),
                                             AKEY_EVENT_ACTION_DOWN,
                                             /*flags=*/fdp.ConsumeIntegral<int32_t>(), AKEYCODE_HOME,
diff --git a/services/inputflinger/tests/fuzzers/InputDispatcherFuzzer.cpp b/services/inputflinger/tests/fuzzers/InputDispatcherFuzzer.cpp
index 7335fb7..79a5ff6 100644
--- a/services/inputflinger/tests/fuzzers/InputDispatcherFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/InputDispatcherFuzzer.cpp
@@ -90,7 +90,7 @@
 
 sp<FakeWindowHandle> generateFuzzedWindow(FuzzedDataProvider& fdp,
                                           std::unique_ptr<InputDispatcher>& dispatcher,
-                                          int32_t displayId) {
+                                          ui::LogicalDisplayId displayId) {
     static size_t windowNumber = 0;
     std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
     std::string windowName = android::base::StringPrintf("Win") + std::to_string(windowNumber++);
@@ -101,10 +101,11 @@
     return window;
 }
 
-void randomizeWindows(
-        std::unordered_map<int32_t, std::vector<sp<FakeWindowHandle>>>& windowsPerDisplay,
-        FuzzedDataProvider& fdp, std::unique_ptr<InputDispatcher>& dispatcher) {
-    const int32_t displayId = fdp.ConsumeIntegralInRange<int32_t>(0, MAX_RANDOM_DISPLAYS - 1);
+void randomizeWindows(std::unordered_map<ui::LogicalDisplayId, std::vector<sp<FakeWindowHandle>>>&
+                              windowsPerDisplay,
+                      FuzzedDataProvider& fdp, std::unique_ptr<InputDispatcher>& dispatcher) {
+    const ui::LogicalDisplayId displayId{
+            fdp.ConsumeIntegralInRange<int32_t>(0, MAX_RANDOM_DISPLAYS - 1)};
     std::vector<sp<FakeWindowHandle>>& windows = windowsPerDisplay[displayId];
 
     fdp.PickValueInArray<std::function<void()>>({
@@ -148,7 +149,7 @@
     // Start InputDispatcher thread
     dispatcher->start();
 
-    std::unordered_map<int32_t, std::vector<sp<FakeWindowHandle>>> windowsPerDisplay;
+    std::unordered_map<ui::LogicalDisplayId, std::vector<sp<FakeWindowHandle>>> windowsPerDisplay;
 
     // Randomly invoke InputDispatcher api's until randomness is exhausted.
     while (fdp.remaining_bytes() > 0) {
diff --git a/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp b/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
index 9223287..34ea54c 100644
--- a/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
+++ b/services/inputflinger/tests/fuzzers/InputReaderFuzzer.cpp
@@ -119,7 +119,7 @@
         return reader->getSensors(deviceId);
     }
 
-    bool canDispatchToDisplay(int32_t deviceId, int32_t displayId) {
+    bool canDispatchToDisplay(int32_t deviceId, ui::LogicalDisplayId displayId) {
         return reader->canDispatchToDisplay(deviceId, displayId);
     }
 
@@ -241,7 +241,8 @@
                 },
                 [&]() -> void {
                     reader->canDispatchToDisplay(fdp->ConsumeIntegral<int32_t>(),
-                                                 fdp->ConsumeIntegral<int32_t>());
+                                                 ui::LogicalDisplayId{
+                                                         fdp->ConsumeIntegral<int32_t>()});
                 },
                 [&]() -> void {
                     reader->getKeyCodeForKeyLocation(fdp->ConsumeIntegral<int32_t>(),
diff --git a/services/inputflinger/tests/fuzzers/MapperHelpers.h b/services/inputflinger/tests/fuzzers/MapperHelpers.h
index e020ca9..25f2f2e 100644
--- a/services/inputflinger/tests/fuzzers/MapperHelpers.h
+++ b/services/inputflinger/tests/fuzzers/MapperHelpers.h
@@ -285,7 +285,7 @@
     void notifyStylusGestureStarted(int32_t, nsecs_t) {}
     bool isInputMethodConnectionActive() override { return mFdp->ConsumeBool(); }
     std::optional<DisplayViewport> getPointerViewportForAssociatedDisplay(
-            int32_t associatedDisplayId) override {
+            ui::LogicalDisplayId associatedDisplayId) override {
         return {};
     }
 };
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 45ab7dd..3bf0eaa 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -137,7 +137,7 @@
 
 auto DisplayDevice::getFrontEndInfo() const -> frontend::DisplayInfo {
     gui::DisplayInfo info;
-    info.displayId = getLayerStack().id;
+    info.displayId = ui::LogicalDisplayId{static_cast<int32_t>(getLayerStack().id)};
 
     // The physical orientation is set when the orientation of the display panel is
     // different than the default orientation of the device. Other services like
diff --git a/services/surfaceflinger/FrontEnd/DisplayInfo.h b/services/surfaceflinger/FrontEnd/DisplayInfo.h
index 6502f36..ea51e92 100644
--- a/services/surfaceflinger/FrontEnd/DisplayInfo.h
+++ b/services/surfaceflinger/FrontEnd/DisplayInfo.h
@@ -21,6 +21,7 @@
 #include <gui/DisplayInfo.h>
 #include <ui/DisplayMap.h>
 #include <ui/LayerStack.h>
+#include <ui/LogicalDisplayId.h>
 #include <ui/Transform.h>
 
 namespace android::surfaceflinger::frontend {
diff --git a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
index 2ff0fac..e40c79c 100644
--- a/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp
@@ -1044,7 +1044,8 @@
     snapshot.touchCropId = requested.touchCropId;
 
     snapshot.inputInfo.id = static_cast<int32_t>(snapshot.uniqueSequence);
-    snapshot.inputInfo.displayId = static_cast<int32_t>(snapshot.outputFilter.layerStack.id);
+    snapshot.inputInfo.displayId =
+            ui::LogicalDisplayId{static_cast<int32_t>(snapshot.outputFilter.layerStack.id)};
     snapshot.inputInfo.touchOcclusionMode = requested.hasInputInfo()
             ? requested.windowInfoHandle->getInfo()->touchOcclusionMode
             : parentSnapshot.inputInfo.touchOcclusionMode;
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 0137a7b..363b35c 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -90,6 +90,10 @@
 
 const ui::Transform kIdentityTransform;
 
+ui::LogicalDisplayId toLogicalDisplayId(const ui::LayerStack& layerStack) {
+    return ui::LogicalDisplayId{static_cast<int32_t>(layerStack.id)};
+}
+
 bool assignTransform(ui::Transform* dst, ui::Transform& from) {
     if (*dst == from) {
         return false;
@@ -2465,7 +2469,7 @@
         mDrawingState.inputInfo.ownerUid = gui::Uid{mOwnerUid};
         mDrawingState.inputInfo.ownerPid = gui::Pid{mOwnerPid};
         mDrawingState.inputInfo.inputConfig |= WindowInfo::InputConfig::NO_INPUT_CHANNEL;
-        mDrawingState.inputInfo.displayId = getLayerStack().id;
+        mDrawingState.inputInfo.displayId = toLogicalDisplayId(getLayerStack());
     }
 
     const ui::Transform& displayTransform =
@@ -2473,7 +2477,7 @@
 
     WindowInfo info = mDrawingState.inputInfo;
     info.id = sequence;
-    info.displayId = getLayerStack().id;
+    info.displayId = toLogicalDisplayId(getLayerStack());
 
     fillInputFrameInfo(info, displayTransform);
 
diff --git a/services/surfaceflinger/LayerProtoHelper.cpp b/services/surfaceflinger/LayerProtoHelper.cpp
index 513c943..753886a 100644
--- a/services/surfaceflinger/LayerProtoHelper.cpp
+++ b/services/surfaceflinger/LayerProtoHelper.cpp
@@ -465,7 +465,7 @@
     displays.Reserve(displayInfos.size());
     for (const auto& [layerStack, displayInfo] : displayInfos) {
         auto displayProto = displays.Add();
-        displayProto->set_id(displayInfo.info.displayId);
+        displayProto->set_id(displayInfo.info.displayId.val());
         displayProto->set_layer_stack(layerStack.id);
         displayProto->mutable_size()->set_w(displayInfo.info.logicalWidth);
         displayProto->mutable_size()->set_h(displayInfo.info.logicalHeight);
diff --git a/services/surfaceflinger/Tracing/TransactionProtoParser.cpp b/services/surfaceflinger/Tracing/TransactionProtoParser.cpp
index 2dc89b5..b3e9fab 100644
--- a/services/surfaceflinger/Tracing/TransactionProtoParser.cpp
+++ b/services/surfaceflinger/Tracing/TransactionProtoParser.cpp
@@ -566,7 +566,7 @@
         const frontend::DisplayInfo& displayInfo, uint32_t layerStack) {
     perfetto::protos::DisplayInfo proto;
     proto.set_layer_stack(layerStack);
-    proto.set_display_id(displayInfo.info.displayId);
+    proto.set_display_id(displayInfo.info.displayId.val());
     proto.set_logical_width(displayInfo.info.logicalWidth);
     proto.set_logical_height(displayInfo.info.logicalHeight);
     asProto(proto.mutable_transform_inverse(), displayInfo.info.transform);
@@ -588,7 +588,7 @@
 frontend::DisplayInfo TransactionProtoParser::fromProto(
         const perfetto::protos::DisplayInfo& proto) {
     frontend::DisplayInfo displayInfo;
-    displayInfo.info.displayId = proto.display_id();
+    displayInfo.info.displayId = ui::LogicalDisplayId{proto.display_id()};
     displayInfo.info.logicalWidth = proto.logical_width();
     displayInfo.info.logicalHeight = proto.logical_height();
     fromProto2(displayInfo.info.transform, proto.transform_inverse());
diff --git a/services/surfaceflinger/tests/unittests/TransactionProtoParserTest.cpp b/services/surfaceflinger/tests/unittests/TransactionProtoParserTest.cpp
index cbb597a..af02330 100644
--- a/services/surfaceflinger/tests/unittests/TransactionProtoParserTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TransactionProtoParserTest.cpp
@@ -106,7 +106,7 @@
 
 TEST(TransactionProtoParserTest, parseDisplayInfo) {
     frontend::DisplayInfo d1;
-    d1.info.displayId = 42;
+    d1.info.displayId = ui::LogicalDisplayId{42};
     d1.info.logicalWidth = 43;
     d1.info.logicalHeight = 44;
     d1.info.transform.set(1, 2, 3, 4);