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;