Pass RawEvent latency from InputReader to InputListener

To keep track of the lower-level latency like touch driver latency, keep
track of the time when eventhub reads the events.

This information will be stored inside RawEvent as it is being read.

Next, this information will be passed to the InputListener. The InputListener will
report this data to LatencyTracker, which will aggregate this
information in order to get end-to-end touch latency.

Different mappers process the input_event events differently. So a
mapper-specific approach is used here.

Bug: 169866723
Test: atest inputflinger_tests
Change-Id: I5e4e90b3251351327022c467af99a6d84f82164e
diff --git a/services/inputflinger/InputListener.cpp b/services/inputflinger/InputListener.cpp
index 4b1f350..33b3e1e 100644
--- a/services/inputflinger/InputListener.cpp
+++ b/services/inputflinger/InputListener.cpp
@@ -50,9 +50,10 @@
 
 // --- NotifyKeyArgs ---
 
-NotifyKeyArgs::NotifyKeyArgs(int32_t id, 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, nsecs_t downTime)
+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)
       : NotifyArgs(id, eventTime),
         deviceId(deviceId),
         source(source),
@@ -63,7 +64,8 @@
         keyCode(keyCode),
         scanCode(scanCode),
         metaState(metaState),
-        downTime(downTime) {}
+        downTime(downTime),
+        readTime(readTime) {}
 
 NotifyKeyArgs::NotifyKeyArgs(const NotifyKeyArgs& other)
       : NotifyArgs(other.id, other.eventTime),
@@ -76,13 +78,15 @@
         keyCode(other.keyCode),
         scanCode(other.scanCode),
         metaState(other.metaState),
-        downTime(other.downTime) {}
+        downTime(other.downTime),
+        readTime(other.readTime) {}
 
 bool NotifyKeyArgs::operator==(const NotifyKeyArgs& rhs) const {
-    return id == rhs.id && eventTime == rhs.eventTime && deviceId == rhs.deviceId &&
-            source == rhs.source && displayId == rhs.displayId && policyFlags == rhs.policyFlags &&
-            action == rhs.action && flags == rhs.flags && keyCode == rhs.keyCode &&
-            scanCode == rhs.scanCode && metaState == rhs.metaState && downTime == rhs.downTime;
+    return id == rhs.id && eventTime == rhs.eventTime && readTime == rhs.readTime &&
+            deviceId == rhs.deviceId && source == rhs.source && displayId == rhs.displayId &&
+            policyFlags == rhs.policyFlags && action == rhs.action && flags == rhs.flags &&
+            keyCode == rhs.keyCode && scanCode == rhs.scanCode && metaState == rhs.metaState &&
+            downTime == rhs.downTime;
 }
 
 void NotifyKeyArgs::notify(const sp<InputListenerInterface>& listener) const {
@@ -91,16 +95,14 @@
 
 // --- NotifyMotionArgs ---
 
-NotifyMotionArgs::NotifyMotionArgs(int32_t id, 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, 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::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,
+        const std::vector<TouchVideoFrame>& videoFrames)
       : NotifyArgs(id, eventTime),
         deviceId(deviceId),
         source(source),
@@ -119,6 +121,7 @@
         xCursorPosition(xCursorPosition),
         yCursorPosition(yCursorPosition),
         downTime(downTime),
+        readTime(readTime),
         videoFrames(videoFrames) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         this->pointerProperties[i].copyFrom(pointerProperties[i]);
@@ -145,6 +148,7 @@
         xCursorPosition(other.xCursorPosition),
         yCursorPosition(other.yCursorPosition),
         downTime(other.downTime),
+        readTime(other.readTime),
         videoFrames(other.videoFrames) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         pointerProperties[i].copyFrom(other.pointerProperties[i]);
@@ -157,11 +161,12 @@
 }
 
 bool NotifyMotionArgs::operator==(const NotifyMotionArgs& rhs) const {
-    bool equal = id == rhs.id && eventTime == rhs.eventTime && deviceId == rhs.deviceId &&
-            source == rhs.source && displayId == rhs.displayId && policyFlags == rhs.policyFlags &&
-            action == rhs.action && actionButton == rhs.actionButton && flags == rhs.flags &&
-            metaState == rhs.metaState && buttonState == rhs.buttonState &&
-            classification == rhs.classification && edgeFlags == rhs.edgeFlags &&
+    bool equal = id == rhs.id && eventTime == rhs.eventTime && readTime == rhs.readTime &&
+            deviceId == rhs.deviceId && source == rhs.source && displayId == rhs.displayId &&
+            policyFlags == rhs.policyFlags && action == rhs.action &&
+            actionButton == rhs.actionButton && flags == rhs.flags && metaState == rhs.metaState &&
+            buttonState == rhs.buttonState && classification == rhs.classification &&
+            edgeFlags == rhs.edgeFlags &&
             pointerCount == rhs.pointerCount
             // PointerProperties and PointerCoords are compared separately below
             && xPrecision == rhs.xPrecision && yPrecision == rhs.yPrecision &&
diff --git a/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp b/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
index d6b7259..182736f 100644
--- a/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
+++ b/services/inputflinger/benchmarks/InputDispatcher_benchmarks.cpp
@@ -249,8 +249,9 @@
 
     const nsecs_t currentTime = now();
     // Define a valid motion event.
-    NotifyMotionArgs args(/* id */ 0, currentTime, DEVICE_ID, AINPUT_SOURCE_TOUCHSCREEN,
-                          ADISPLAY_ID_DEFAULT, POLICY_FLAG_PASS_TO_USER, AMOTION_EVENT_ACTION_DOWN,
+    NotifyMotionArgs args(/* id */ 0, currentTime, currentTime, DEVICE_ID,
+                          AINPUT_SOURCE_TOUCHSCREEN, 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,
                           pointerProperties, pointerCoords,
diff --git a/services/inputflinger/include/InputListener.h b/services/inputflinger/include/InputListener.h
index 094bc0c..4b7d26d 100644
--- a/services/inputflinger/include/InputListener.h
+++ b/services/inputflinger/include/InputListener.h
@@ -73,12 +73,14 @@
     int32_t scanCode;
     int32_t metaState;
     nsecs_t downTime;
+    nsecs_t readTime;
 
     inline NotifyKeyArgs() { }
 
-    NotifyKeyArgs(int32_t id, 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, nsecs_t downTime);
+    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);
 
     bool operator==(const NotifyKeyArgs& rhs) const;
 
@@ -120,13 +122,14 @@
     float xCursorPosition;
     float yCursorPosition;
     nsecs_t downTime;
+    nsecs_t readTime;
     std::vector<TouchVideoFrame> videoFrames;
 
     inline NotifyMotionArgs() { }
 
-    NotifyMotionArgs(int32_t id, 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,
+    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,
diff --git a/services/inputflinger/reader/EventHub.cpp b/services/inputflinger/reader/EventHub.cpp
index 8f8c051..265dfb7 100644
--- a/services/inputflinger/reader/EventHub.cpp
+++ b/services/inputflinger/reader/EventHub.cpp
@@ -1280,6 +1280,7 @@
                     for (size_t i = 0; i < count; i++) {
                         struct input_event& iev = readBuffer[i];
                         event->when = processEventTimestamp(iev);
+                        event->readTime = systemTime(SYSTEM_TIME_MONOTONIC);
                         event->deviceId = deviceId;
                         event->type = iev.type;
                         event->code = iev.code;
diff --git a/services/inputflinger/reader/InputDevice.cpp b/services/inputflinger/reader/InputDevice.cpp
index 574f651..d4d14b1 100644
--- a/services/inputflinger/reader/InputDevice.cpp
+++ b/services/inputflinger/reader/InputDevice.cpp
@@ -492,8 +492,8 @@
     for_each_mapper([sensorType](InputMapper& mapper) { mapper.flushSensor(sensorType); });
 }
 
-void InputDevice::cancelTouch(nsecs_t when) {
-    for_each_mapper([when](InputMapper& mapper) { mapper.cancelTouch(when); });
+void InputDevice::cancelTouch(nsecs_t when, nsecs_t readTime) {
+    for_each_mapper([when, readTime](InputMapper& mapper) { mapper.cancelTouch(when, readTime); });
 }
 
 std::optional<int32_t> InputDevice::getBatteryCapacity() {
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
index 30967df..13364e0 100644
--- a/services/inputflinger/reader/include/EventHub.h
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -51,7 +51,11 @@
  * A raw event as retrieved from the EventHub.
  */
 struct RawEvent {
+    // Time when the event happened
     nsecs_t when;
+    // Time when the event was read by EventHub. Only populated for input events.
+    // For other events (device added/removed/etc), this value is undefined and should not be read.
+    nsecs_t readTime;
     int32_t deviceId;
     int32_t type;
     int32_t code;
diff --git a/services/inputflinger/reader/include/InputDevice.h b/services/inputflinger/reader/include/InputDevice.h
index e4186c8..064e00d 100644
--- a/services/inputflinger/reader/include/InputDevice.h
+++ b/services/inputflinger/reader/include/InputDevice.h
@@ -86,7 +86,7 @@
     void cancelVibrate(int32_t token);
     bool isVibrating();
     std::vector<int32_t> getVibratorIds();
-    void cancelTouch(nsecs_t when);
+    void cancelTouch(nsecs_t when, nsecs_t readTime);
     bool enableSensor(InputDeviceSensorType sensorType, std::chrono::microseconds samplingPeriod,
                       std::chrono::microseconds maxBatchReportLatency);
     void disableSensor(InputDeviceSensorType sensorType);
@@ -322,7 +322,7 @@
     inline std::optional<DisplayViewport> getAssociatedViewport() const {
         return mDevice.getAssociatedViewport();
     }
-    inline void cancelTouch(nsecs_t when) { mDevice.cancelTouch(when); }
+    inline void cancelTouch(nsecs_t when, nsecs_t readTime) { mDevice.cancelTouch(when, readTime); }
     inline void bumpGeneration() { mDevice.bumpGeneration(); }
     inline const PropertyMap& getConfiguration() { return mDevice.getConfiguration(); }
 
diff --git a/services/inputflinger/reader/mapper/CursorInputMapper.cpp b/services/inputflinger/reader/mapper/CursorInputMapper.cpp
index 254b64b..bb12be7 100644
--- a/services/inputflinger/reader/mapper/CursorInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/CursorInputMapper.cpp
@@ -265,11 +265,11 @@
     mCursorScrollAccumulator.process(rawEvent);
 
     if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
-        sync(rawEvent->when);
+        sync(rawEvent->when, rawEvent->readTime);
     }
 }
 
-void CursorInputMapper::sync(nsecs_t when) {
+void CursorInputMapper::sync(nsecs_t when, nsecs_t readTime) {
     int32_t lastButtonState = mButtonState;
     int32_t currentButtonState = mCursorButtonAccumulator.getButtonState();
     mButtonState = currentButtonState;
@@ -362,8 +362,8 @@
     }
 
     // Synthesize key down from buttons if needed.
-    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
-                         displayId, policyFlags, lastButtonState, currentButtonState);
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, readTime, getDeviceId(),
+                         mSource, displayId, policyFlags, lastButtonState, currentButtonState);
 
     // Send motion event.
     if (downChanged || moved || scrolled || buttonsChanged) {
@@ -383,8 +383,8 @@
             while (!released.isEmpty()) {
                 int32_t actionButton = BitSet32::valueForBit(released.clearFirstMarkedBit());
                 buttonState &= ~actionButton;
-                NotifyMotionArgs releaseArgs(getContext()->getNextId(), when, getDeviceId(),
-                                             mSource, displayId, policyFlags,
+                NotifyMotionArgs releaseArgs(getContext()->getNextId(), when, readTime,
+                                             getDeviceId(), mSource, displayId, policyFlags,
                                              AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton, 0,
                                              metaState, buttonState, MotionClassification::NONE,
                                              AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
@@ -395,11 +395,11 @@
             }
         }
 
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, motionEventAction, 0, 0, metaState, currentButtonState,
-                              MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, 1,
-                              &pointerProperties, &pointerCoords, mXPrecision, mYPrecision,
-                              xCursorPosition, yCursorPosition, downTime,
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, motionEventAction, 0, 0, metaState,
+                              currentButtonState, MotionClassification::NONE,
+                              AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties, &pointerCoords,
+                              mXPrecision, mYPrecision, xCursorPosition, yCursorPosition, downTime,
                               /* videoFrames */ {});
         getListener()->notifyMotion(&args);
 
@@ -408,8 +408,8 @@
             while (!pressed.isEmpty()) {
                 int32_t actionButton = BitSet32::valueForBit(pressed.clearFirstMarkedBit());
                 buttonState |= actionButton;
-                NotifyMotionArgs pressArgs(getContext()->getNextId(), when, getDeviceId(), mSource,
-                                           displayId, policyFlags,
+                NotifyMotionArgs pressArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
+                                           mSource, displayId, policyFlags,
                                            AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton, 0,
                                            metaState, buttonState, MotionClassification::NONE,
                                            AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
@@ -424,9 +424,10 @@
 
         // Send hover move after UP to tell the application that the mouse is hovering now.
         if (motionEventAction == AMOTION_EVENT_ACTION_UP && (mSource == AINPUT_SOURCE_MOUSE)) {
-            NotifyMotionArgs hoverArgs(getContext()->getNextId(), when, getDeviceId(), mSource,
-                                       displayId, policyFlags, AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
-                                       0, metaState, currentButtonState, MotionClassification::NONE,
+            NotifyMotionArgs hoverArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
+                                       mSource, displayId, policyFlags,
+                                       AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
+                                       currentButtonState, MotionClassification::NONE,
                                        AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
                                        &pointerCoords, mXPrecision, mYPrecision, xCursorPosition,
                                        yCursorPosition, downTime, /* videoFrames */ {});
@@ -438,9 +439,10 @@
             pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
             pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
 
-            NotifyMotionArgs scrollArgs(getContext()->getNextId(), when, getDeviceId(), mSource,
-                                        displayId, policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0, 0,
-                                        metaState, currentButtonState, MotionClassification::NONE,
+            NotifyMotionArgs scrollArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
+                                        mSource, displayId, policyFlags,
+                                        AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState,
+                                        currentButtonState, MotionClassification::NONE,
                                         AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
                                         &pointerCoords, mXPrecision, mYPrecision, xCursorPosition,
                                         yCursorPosition, downTime, /* videoFrames */ {});
@@ -449,7 +451,7 @@
     }
 
     // Synthesize key up from buttons if needed.
-    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, readTime, getDeviceId(), mSource,
                          displayId, policyFlags, lastButtonState, currentButtonState);
 
     mCursorMotionAccumulator.finishSync();
diff --git a/services/inputflinger/reader/mapper/CursorInputMapper.h b/services/inputflinger/reader/mapper/CursorInputMapper.h
index 05bbb26..9a8ca01 100644
--- a/services/inputflinger/reader/mapper/CursorInputMapper.h
+++ b/services/inputflinger/reader/mapper/CursorInputMapper.h
@@ -114,7 +114,7 @@
     void configureParameters();
     void dumpParameters(std::string& dump);
 
-    void sync(nsecs_t when);
+    void sync(nsecs_t when, nsecs_t readTime);
 };
 
 } // namespace android
diff --git a/services/inputflinger/reader/mapper/InputMapper.cpp b/services/inputflinger/reader/mapper/InputMapper.cpp
index 1ce54ae..df1acd4 100644
--- a/services/inputflinger/reader/mapper/InputMapper.cpp
+++ b/services/inputflinger/reader/mapper/InputMapper.cpp
@@ -68,7 +68,7 @@
     return {};
 }
 
-void InputMapper::cancelTouch(nsecs_t when) {}
+void InputMapper::cancelTouch(nsecs_t when, nsecs_t readTime) {}
 
 bool InputMapper::enableSensor(InputDeviceSensorType sensorType,
                                std::chrono::microseconds samplingPeriod,
diff --git a/services/inputflinger/reader/mapper/InputMapper.h b/services/inputflinger/reader/mapper/InputMapper.h
index 1cc5979..8719f3a 100644
--- a/services/inputflinger/reader/mapper/InputMapper.h
+++ b/services/inputflinger/reader/mapper/InputMapper.h
@@ -67,7 +67,7 @@
     virtual void cancelVibrate(int32_t token);
     virtual bool isVibrating();
     virtual std::vector<int32_t> getVibratorIds();
-    virtual void cancelTouch(nsecs_t when);
+    virtual void cancelTouch(nsecs_t when, nsecs_t readTime);
     virtual bool enableSensor(InputDeviceSensorType sensorType,
                               std::chrono::microseconds samplingPeriod,
                               std::chrono::microseconds maxBatchReportLatency);
diff --git a/services/inputflinger/reader/mapper/JoystickInputMapper.cpp b/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
index 37aa140..0dc312e 100644
--- a/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
@@ -299,14 +299,14 @@
         case EV_SYN:
             switch (rawEvent->code) {
                 case SYN_REPORT:
-                    sync(rawEvent->when, false /*force*/);
+                    sync(rawEvent->when, rawEvent->readTime, false /*force*/);
                     break;
             }
             break;
     }
 }
 
-void JoystickInputMapper::sync(nsecs_t when, bool force) {
+void JoystickInputMapper::sync(nsecs_t when, nsecs_t readTime, bool force) {
     if (!filterAxes(force)) {
         return;
     }
@@ -337,9 +337,10 @@
     // TODO: Use the input device configuration to control this behavior more finely.
     uint32_t policyFlags = 0;
 
-    NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), AINPUT_SOURCE_JOYSTICK,
-                          ADISPLAY_ID_NONE, policyFlags, AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState,
-                          buttonState, MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, 1,
+    NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(),
+                          AINPUT_SOURCE_JOYSTICK, ADISPLAY_ID_NONE, policyFlags,
+                          AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
+                          MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, 1,
                           &pointerProperties, &pointerCoords, 0, 0,
                           AMOTION_EVENT_INVALID_CURSOR_POSITION,
                           AMOTION_EVENT_INVALID_CURSOR_POSITION, 0, /* videoFrames */ {});
diff --git a/services/inputflinger/reader/mapper/JoystickInputMapper.h b/services/inputflinger/reader/mapper/JoystickInputMapper.h
index 0cf60a2..bba95ad 100644
--- a/services/inputflinger/reader/mapper/JoystickInputMapper.h
+++ b/services/inputflinger/reader/mapper/JoystickInputMapper.h
@@ -92,7 +92,7 @@
     // Axes indexed by raw ABS_* axis index.
     std::unordered_map<int32_t, Axis> mAxes;
 
-    void sync(nsecs_t when, bool force);
+    void sync(nsecs_t when, nsecs_t readTime, bool force);
 
     bool haveAxis(int32_t axisId);
     void pruneAxes(bool ignoreExplicitlyMappedAxes);
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
index 8b9f235..2c5a576 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.cpp
@@ -216,7 +216,8 @@
             mCurrentHidUsage = 0;
 
             if (isKeyboardOrGamepadKey(scanCode)) {
-                processKey(rawEvent->when, rawEvent->value != 0, scanCode, usageCode);
+                processKey(rawEvent->when, rawEvent->readTime, rawEvent->value != 0, scanCode,
+                           usageCode);
             }
             break;
         }
@@ -269,7 +270,8 @@
     return false;
 }
 
-void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t scanCode, int32_t usageCode) {
+void KeyboardInputMapper::processKey(nsecs_t when, nsecs_t readTime, bool down, int32_t scanCode,
+                                     int32_t usageCode) {
     int32_t keyCode;
     int32_t keyMetaState;
     uint32_t policyFlags;
@@ -299,7 +301,7 @@
                 return;
             }
             if (policyFlags & POLICY_FLAG_GESTURE) {
-                getDeviceContext().cancelTouch(when);
+                getDeviceContext().cancelTouch(when, readTime);
             }
 
             KeyDown keyDown;
@@ -350,8 +352,9 @@
         policyFlags |= POLICY_FLAG_DISABLE_KEY_REPEAT;
     }
 
-    NotifyKeyArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, getDisplayId(),
-                       policyFlags, down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
+    NotifyKeyArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                       getDisplayId(), policyFlags,
+                       down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
                        AKEY_EVENT_FLAG_FROM_SYSTEM, keyCode, scanCode, keyMetaState, downTime);
     getListener()->notifyKey(&args);
 }
diff --git a/services/inputflinger/reader/mapper/KeyboardInputMapper.h b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
index 4c0b42a..ca41712 100644
--- a/services/inputflinger/reader/mapper/KeyboardInputMapper.h
+++ b/services/inputflinger/reader/mapper/KeyboardInputMapper.h
@@ -86,7 +86,7 @@
     bool isKeyboardOrGamepadKey(int32_t scanCode);
     bool isMediaKey(int32_t keyCode);
 
-    void processKey(nsecs_t when, bool down, int32_t scanCode, int32_t usageCode);
+    void processKey(nsecs_t when, nsecs_t readTime, bool down, int32_t scanCode, int32_t usageCode);
 
     bool updateMetaStateIfNeeded(int32_t keyCode, bool down);
 
diff --git a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
index 594ff42..e9d0189 100644
--- a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.cpp
@@ -87,11 +87,11 @@
     mRotaryEncoderScrollAccumulator.process(rawEvent);
 
     if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
-        sync(rawEvent->when);
+        sync(rawEvent->when, rawEvent->readTime);
     }
 }
 
-void RotaryEncoderInputMapper::sync(nsecs_t when) {
+void RotaryEncoderInputMapper::sync(nsecs_t when, nsecs_t readTime) {
     PointerCoords pointerCoords;
     pointerCoords.clear();
 
@@ -121,9 +121,9 @@
         int32_t metaState = getContext()->getGlobalMetaState();
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_SCROLL, scroll * mScalingFactor);
 
-        NotifyMotionArgs scrollArgs(getContext()->getNextId(), when, getDeviceId(), mSource,
-                                    displayId, policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0, 0,
-                                    metaState, /* buttonState */ 0, MotionClassification::NONE,
+        NotifyMotionArgs scrollArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
+                                    mSource, displayId, policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0,
+                                    0, metaState, /* buttonState */ 0, MotionClassification::NONE,
                                     AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
                                     &pointerCoords, 0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                     AMOTION_EVENT_INVALID_CURSOR_POSITION, 0, /* videoFrames */ {});
diff --git a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h
index 7a77b12..e0c9404 100644
--- a/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h
+++ b/services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h
@@ -42,7 +42,7 @@
     float mScalingFactor;
     int32_t mOrientation;
 
-    void sync(nsecs_t when);
+    void sync(nsecs_t when, nsecs_t readTime);
 };
 
 } // namespace android
diff --git a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
index a86443d..5344227 100644
--- a/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
+++ b/services/inputflinger/reader/mapper/TouchCursorInputMapperCommon.h
@@ -59,27 +59,27 @@
 }
 
 static void synthesizeButtonKey(InputReaderContext* context, int32_t action, nsecs_t when,
-                                int32_t deviceId, uint32_t source, int32_t displayId,
-                                uint32_t policyFlags, int32_t lastButtonState,
+                                nsecs_t readTime, int32_t deviceId, uint32_t source,
+                                int32_t displayId, uint32_t policyFlags, int32_t lastButtonState,
                                 int32_t currentButtonState, int32_t buttonState, int32_t keyCode) {
     if ((action == AKEY_EVENT_ACTION_DOWN && !(lastButtonState & buttonState) &&
          (currentButtonState & buttonState)) ||
         (action == AKEY_EVENT_ACTION_UP && (lastButtonState & buttonState) &&
          !(currentButtonState & buttonState))) {
-        NotifyKeyArgs args(context->getNextId(), when, deviceId, source, displayId, policyFlags,
-                           action, 0, keyCode, 0, context->getGlobalMetaState(), when);
+        NotifyKeyArgs args(context->getNextId(), when, readTime, deviceId, source, displayId,
+                           policyFlags, action, 0, keyCode, 0, context->getGlobalMetaState(), when);
         context->getListener()->notifyKey(&args);
     }
 }
 
 static void synthesizeButtonKeys(InputReaderContext* context, int32_t action, nsecs_t when,
-                                 int32_t deviceId, uint32_t source, int32_t displayId,
-                                 uint32_t policyFlags, int32_t lastButtonState,
+                                 nsecs_t readTime, int32_t deviceId, uint32_t source,
+                                 int32_t displayId, uint32_t policyFlags, int32_t lastButtonState,
                                  int32_t currentButtonState) {
-    synthesizeButtonKey(context, action, when, deviceId, source, displayId, policyFlags,
+    synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId, policyFlags,
                         lastButtonState, currentButtonState, AMOTION_EVENT_BUTTON_BACK,
                         AKEYCODE_BACK);
-    synthesizeButtonKey(context, action, when, deviceId, source, displayId, policyFlags,
+    synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId, policyFlags,
                         lastButtonState, currentButtonState, AMOTION_EVENT_BUTTON_FORWARD,
                         AKEYCODE_FORWARD);
 }
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.cpp b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
index d1df37b..16cf010 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
@@ -1016,7 +1016,8 @@
             mPointerGestureMaxSwipeWidth = mConfig.pointerGestureSwipeMaxWidthRatio * rawDiagonal;
 
             // Abort current pointer usages because the state has changed.
-            abortPointerUsage(when, 0 /*policyFlags*/);
+            const nsecs_t readTime = when; // synthetic event
+            abortPointerUsage(when, readTime, 0 /*policyFlags*/);
         }
 
         // Inform the dispatcher about the changes.
@@ -1406,11 +1407,11 @@
     mTouchButtonAccumulator.process(rawEvent);
 
     if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
-        sync(rawEvent->when);
+        sync(rawEvent->when, rawEvent->readTime);
     }
 }
 
-void TouchInputMapper::sync(nsecs_t when) {
+void TouchInputMapper::sync(nsecs_t when, nsecs_t readTime) {
     const RawState* last =
             mRawStatesPending.empty() ? &mCurrentRawState : &mRawStatesPending.back();
 
@@ -1420,6 +1421,7 @@
     RawState* next = &mRawStatesPending.back();
     next->clear();
     next->when = when;
+    next->readTime = readTime;
 
     // Sync button state.
     next->buttonState =
@@ -1453,7 +1455,7 @@
 void TouchInputMapper::processRawTouches(bool timeout) {
     if (mDeviceMode == DeviceMode::DISABLED) {
         // Drop all input if the device is disabled.
-        cancelTouch(mCurrentRawState.when);
+        cancelTouch(mCurrentRawState.when, mCurrentRawState.readTime);
         mCurrentCookedState.clear();
         updateTouchSpots();
         return;
@@ -1479,8 +1481,9 @@
         mCurrentRawState.copyFrom(next);
         if (mCurrentRawState.when < mLastRawState.when) {
             mCurrentRawState.when = mLastRawState.when;
+            mCurrentRawState.readTime = mLastRawState.readTime;
         }
-        cookAndDispatch(mCurrentRawState.when);
+        cookAndDispatch(mCurrentRawState.when, mCurrentRawState.readTime);
     }
     if (count != 0) {
         mRawStatesPending.erase(mRawStatesPending.begin(), mRawStatesPending.begin() + count);
@@ -1494,7 +1497,8 @@
 #if DEBUG_STYLUS_FUSION
             ALOGD("Timeout expired, synthesizing event with new stylus data");
 #endif
-            cookAndDispatch(when);
+            const nsecs_t readTime = when; // consider this synthetic event to be zero latency
+            cookAndDispatch(when, readTime);
         } else if (mExternalStylusFusionTimeout == LLONG_MAX) {
             mExternalStylusFusionTimeout = mExternalStylusState.when + TOUCH_DATA_TIMEOUT;
             getContext()->requestTimeoutAtTime(mExternalStylusFusionTimeout);
@@ -1502,7 +1506,7 @@
     }
 }
 
-void TouchInputMapper::cookAndDispatch(nsecs_t when) {
+void TouchInputMapper::cookAndDispatch(nsecs_t when, nsecs_t readTime) {
     // Always start with a clean state.
     mCurrentCookedState.clear();
 
@@ -1528,7 +1532,7 @@
 
     // Consume raw off-screen touches before cooking pointer data.
     // If touches are consumed, subsequent code will not receive any pointer data.
-    if (consumeRawTouches(when, policyFlags)) {
+    if (consumeRawTouches(when, readTime, policyFlags)) {
         mCurrentRawState.rawPointerData.clear();
     }
 
@@ -1541,8 +1545,8 @@
     applyExternalStylusTouchState(when);
 
     // Synthesize key down from raw buttons if needed.
-    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
-                         mViewport.displayId, policyFlags, mLastCookedState.buttonState,
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, readTime, getDeviceId(),
+                         mSource, mViewport.displayId, policyFlags, mLastCookedState.buttonState,
                          mCurrentCookedState.buttonState);
 
     // Dispatch the touches either directly or by translation through a pointer on screen.
@@ -1585,16 +1589,16 @@
             pointerUsage = PointerUsage::GESTURES;
         }
 
-        dispatchPointerUsage(when, policyFlags, pointerUsage);
+        dispatchPointerUsage(when, readTime, policyFlags, pointerUsage);
     } else {
         updateTouchSpots();
 
         if (!mCurrentMotionAborted) {
-            dispatchButtonRelease(when, policyFlags);
-            dispatchHoverExit(when, policyFlags);
-            dispatchTouches(when, policyFlags);
-            dispatchHoverEnterAndMove(when, policyFlags);
-            dispatchButtonPress(when, policyFlags);
+            dispatchButtonRelease(when, readTime, policyFlags);
+            dispatchHoverExit(when, readTime, policyFlags);
+            dispatchTouches(when, readTime, policyFlags);
+            dispatchHoverEnterAndMove(when, readTime, policyFlags);
+            dispatchButtonPress(when, readTime, policyFlags);
         }
 
         if (mCurrentCookedState.cookedPointerData.pointerCount == 0) {
@@ -1603,7 +1607,7 @@
     }
 
     // Synthesize key up from raw buttons if needed.
-    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, readTime, getDeviceId(), mSource,
                          mViewport.displayId, policyFlags, mLastCookedState.buttonState,
                          mCurrentCookedState.buttonState);
 
@@ -1716,7 +1720,9 @@
 void TouchInputMapper::timeoutExpired(nsecs_t when) {
     if (mDeviceMode == DeviceMode::POINTER) {
         if (mPointerUsage == PointerUsage::GESTURES) {
-            dispatchPointerGestures(when, 0 /*policyFlags*/, true /*isTimeout*/);
+            // Since this is a synthetic event, we can consider its latency to be zero
+            const nsecs_t readTime = when;
+            dispatchPointerGestures(when, readTime, 0 /*policyFlags*/, true /*isTimeout*/);
         }
     } else if (mDeviceMode == DeviceMode::DIRECT) {
         if (mExternalStylusFusionTimeout < when) {
@@ -1738,7 +1744,7 @@
     }
 }
 
-bool TouchInputMapper::consumeRawTouches(nsecs_t when, uint32_t policyFlags) {
+bool TouchInputMapper::consumeRawTouches(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     // Check for release of a virtual key.
     if (mCurrentVirtualKey.down) {
         if (mCurrentRawState.rawPointerData.touchingIdBits.isEmpty()) {
@@ -1749,7 +1755,7 @@
                 ALOGD("VirtualKeys: Generating key up: keyCode=%d, scanCode=%d",
                       mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
 #endif
-                dispatchVirtualKey(when, policyFlags, AKEY_EVENT_ACTION_UP,
+                dispatchVirtualKey(when, readTime, policyFlags, AKEY_EVENT_ACTION_UP,
                                    AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
             }
             return true;
@@ -1776,7 +1782,7 @@
             ALOGD("VirtualKeys: Canceling key: keyCode=%d, scanCode=%d", mCurrentVirtualKey.keyCode,
                   mCurrentVirtualKey.scanCode);
 #endif
-            dispatchVirtualKey(when, policyFlags, AKEY_EVENT_ACTION_UP,
+            dispatchVirtualKey(when, readTime, policyFlags, AKEY_EVENT_ACTION_UP,
                                AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY |
                                        AKEY_EVENT_FLAG_CANCELED);
         }
@@ -1807,7 +1813,7 @@
                         ALOGD("VirtualKeys: Generating key down: keyCode=%d, scanCode=%d",
                               mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
 #endif
-                        dispatchVirtualKey(when, policyFlags, AKEY_EVENT_ACTION_DOWN,
+                        dispatchVirtualKey(when, readTime, policyFlags, AKEY_EVENT_ACTION_DOWN,
                                            AKEY_EVENT_FLAG_FROM_SYSTEM |
                                                    AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
                     }
@@ -1838,7 +1844,7 @@
     return false;
 }
 
-void TouchInputMapper::dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
+void TouchInputMapper::dispatchVirtualKey(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
                                           int32_t keyEventAction, int32_t keyEventFlags) {
     int32_t keyCode = mCurrentVirtualKey.keyCode;
     int32_t scanCode = mCurrentVirtualKey.scanCode;
@@ -1846,19 +1852,19 @@
     int32_t metaState = getContext()->getGlobalMetaState();
     policyFlags |= POLICY_FLAG_VIRTUAL;
 
-    NotifyKeyArgs args(getContext()->getNextId(), when, getDeviceId(), AINPUT_SOURCE_KEYBOARD,
-                       mViewport.displayId, policyFlags, keyEventAction, keyEventFlags, keyCode,
-                       scanCode, metaState, downTime);
+    NotifyKeyArgs args(getContext()->getNextId(), when, readTime, getDeviceId(),
+                       AINPUT_SOURCE_KEYBOARD, mViewport.displayId, policyFlags, keyEventAction,
+                       keyEventFlags, keyCode, scanCode, metaState, downTime);
     getListener()->notifyKey(&args);
 }
 
-void TouchInputMapper::abortTouches(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::abortTouches(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
     if (!currentIdBits.isEmpty()) {
         int32_t metaState = getContext()->getGlobalMetaState();
         int32_t buttonState = mCurrentCookedState.buttonState;
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState,
-                       buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0,
+                       metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                        mCurrentCookedState.cookedPointerData.pointerProperties,
                        mCurrentCookedState.cookedPointerData.pointerCoords,
                        mCurrentCookedState.cookedPointerData.idToIndex, currentIdBits, -1,
@@ -1867,7 +1873,7 @@
     }
 }
 
-void TouchInputMapper::dispatchTouches(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchTouches(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     BitSet32 currentIdBits = mCurrentCookedState.cookedPointerData.touchingIdBits;
     BitSet32 lastIdBits = mLastCookedState.cookedPointerData.touchingIdBits;
     int32_t metaState = getContext()->getGlobalMetaState();
@@ -1877,8 +1883,8 @@
         if (!currentIdBits.isEmpty()) {
             // No pointer id changes so this is a move event.
             // The listener takes care of batching moves so we don't have to deal with that here.
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState,
-                           buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_MOVE, 0, 0,
+                           metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                            mCurrentCookedState.cookedPointerData.pointerProperties,
                            mCurrentCookedState.cookedPointerData.pointerCoords,
                            mCurrentCookedState.cookedPointerData.idToIndex, currentIdBits, -1,
@@ -1912,7 +1918,7 @@
             if (isCanceled) {
                 ALOGI("Canceling pointer %d for the palm event was detected.", upId);
             }
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_UP, 0,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_UP, 0,
                            isCanceled ? AMOTION_EVENT_FLAG_CANCELED : 0, metaState, buttonState, 0,
                            mLastCookedState.cookedPointerData.pointerProperties,
                            mLastCookedState.cookedPointerData.pointerCoords,
@@ -1927,8 +1933,9 @@
         // events, they do not generally handle them except when presented in a move event.
         if (moveNeeded && !moveIdBits.isEmpty()) {
             ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState,
-                           buttonState, 0, mCurrentCookedState.cookedPointerData.pointerProperties,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_MOVE, 0, 0,
+                           metaState, buttonState, 0,
+                           mCurrentCookedState.cookedPointerData.pointerProperties,
                            mCurrentCookedState.cookedPointerData.pointerCoords,
                            mCurrentCookedState.cookedPointerData.idToIndex, dispatchedIdBits, -1,
                            mOrientedXPrecision, mOrientedYPrecision, mDownTime);
@@ -1944,8 +1951,8 @@
                 mDownTime = when;
             }
 
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0,
-                           metaState, buttonState, 0,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_DOWN,
+                           0, 0, metaState, buttonState, 0,
                            mCurrentCookedState.cookedPointerData.pointerProperties,
                            mCurrentCookedState.cookedPointerData.pointerCoords,
                            mCurrentCookedState.cookedPointerData.idToIndex, dispatchedIdBits,
@@ -1954,13 +1961,13 @@
     }
 }
 
-void TouchInputMapper::dispatchHoverExit(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchHoverExit(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     if (mSentHoverEnter &&
         (mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty() ||
          !mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty())) {
         int32_t metaState = getContext()->getGlobalMetaState();
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState,
-                       mLastCookedState.buttonState, 0,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0,
+                       metaState, mLastCookedState.buttonState, 0,
                        mLastCookedState.cookedPointerData.pointerProperties,
                        mLastCookedState.cookedPointerData.pointerCoords,
                        mLastCookedState.cookedPointerData.idToIndex,
@@ -1970,13 +1977,14 @@
     }
 }
 
-void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, nsecs_t readTime,
+                                                 uint32_t policyFlags) {
     if (mCurrentCookedState.cookedPointerData.touchingIdBits.isEmpty() &&
         !mCurrentCookedState.cookedPointerData.hoveringIdBits.isEmpty()) {
         int32_t metaState = getContext()->getGlobalMetaState();
         if (!mSentHoverEnter) {
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0,
-                           metaState, mCurrentRawState.buttonState, 0,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
+                           0, 0, metaState, mCurrentRawState.buttonState, 0,
                            mCurrentCookedState.cookedPointerData.pointerProperties,
                            mCurrentCookedState.cookedPointerData.pointerCoords,
                            mCurrentCookedState.cookedPointerData.idToIndex,
@@ -1985,8 +1993,8 @@
             mSentHoverEnter = true;
         }
 
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
-                       mCurrentRawState.buttonState, 0,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
+                       metaState, mCurrentRawState.buttonState, 0,
                        mCurrentCookedState.cookedPointerData.pointerProperties,
                        mCurrentCookedState.cookedPointerData.pointerCoords,
                        mCurrentCookedState.cookedPointerData.idToIndex,
@@ -1995,7 +2003,7 @@
     }
 }
 
-void TouchInputMapper::dispatchButtonRelease(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchButtonRelease(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     BitSet32 releasedButtons(mLastCookedState.buttonState & ~mCurrentCookedState.buttonState);
     const BitSet32& idBits = findActiveIdBits(mLastCookedState.cookedPointerData);
     const int32_t metaState = getContext()->getGlobalMetaState();
@@ -2003,7 +2011,7 @@
     while (!releasedButtons.isEmpty()) {
         int32_t actionButton = BitSet32::valueForBit(releasedButtons.clearFirstMarkedBit());
         buttonState &= ~actionButton;
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_RELEASE,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_RELEASE,
                        actionButton, 0, metaState, buttonState, 0,
                        mCurrentCookedState.cookedPointerData.pointerProperties,
                        mCurrentCookedState.cookedPointerData.pointerCoords,
@@ -2012,7 +2020,7 @@
     }
 }
 
-void TouchInputMapper::dispatchButtonPress(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchButtonPress(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     BitSet32 pressedButtons(mCurrentCookedState.buttonState & ~mLastCookedState.buttonState);
     const BitSet32& idBits = findActiveIdBits(mCurrentCookedState.cookedPointerData);
     const int32_t metaState = getContext()->getGlobalMetaState();
@@ -2020,8 +2028,8 @@
     while (!pressedButtons.isEmpty()) {
         int32_t actionButton = BitSet32::valueForBit(pressedButtons.clearFirstMarkedBit());
         buttonState |= actionButton;
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton,
-                       0, metaState, buttonState, 0,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS,
+                       actionButton, 0, metaState, buttonState, 0,
                        mCurrentCookedState.cookedPointerData.pointerProperties,
                        mCurrentCookedState.cookedPointerData.pointerCoords,
                        mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
@@ -2308,38 +2316,38 @@
     }
 }
 
-void TouchInputMapper::dispatchPointerUsage(nsecs_t when, uint32_t policyFlags,
+void TouchInputMapper::dispatchPointerUsage(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
                                             PointerUsage pointerUsage) {
     if (pointerUsage != mPointerUsage) {
-        abortPointerUsage(when, policyFlags);
+        abortPointerUsage(when, readTime, policyFlags);
         mPointerUsage = pointerUsage;
     }
 
     switch (mPointerUsage) {
         case PointerUsage::GESTURES:
-            dispatchPointerGestures(when, policyFlags, false /*isTimeout*/);
+            dispatchPointerGestures(when, readTime, policyFlags, false /*isTimeout*/);
             break;
         case PointerUsage::STYLUS:
-            dispatchPointerStylus(when, policyFlags);
+            dispatchPointerStylus(when, readTime, policyFlags);
             break;
         case PointerUsage::MOUSE:
-            dispatchPointerMouse(when, policyFlags);
+            dispatchPointerMouse(when, readTime, policyFlags);
             break;
         case PointerUsage::NONE:
             break;
     }
 }
 
-void TouchInputMapper::abortPointerUsage(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::abortPointerUsage(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     switch (mPointerUsage) {
         case PointerUsage::GESTURES:
-            abortPointerGestures(when, policyFlags);
+            abortPointerGestures(when, readTime, policyFlags);
             break;
         case PointerUsage::STYLUS:
-            abortPointerStylus(when, policyFlags);
+            abortPointerStylus(when, readTime, policyFlags);
             break;
         case PointerUsage::MOUSE:
-            abortPointerMouse(when, policyFlags);
+            abortPointerMouse(when, readTime, policyFlags);
             break;
         case PointerUsage::NONE:
             break;
@@ -2348,7 +2356,8 @@
     mPointerUsage = PointerUsage::NONE;
 }
 
-void TouchInputMapper::dispatchPointerGestures(nsecs_t when, uint32_t policyFlags, bool isTimeout) {
+void TouchInputMapper::dispatchPointerGestures(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
+                                               bool isTimeout) {
     // Update current gesture coordinates.
     bool cancelPreviousGesture, finishPreviousGesture;
     bool sendEvents =
@@ -2441,8 +2450,8 @@
     BitSet32 dispatchedGestureIdBits(mPointerGesture.lastGestureIdBits);
     if (!dispatchedGestureIdBits.isEmpty()) {
         if (cancelPreviousGesture) {
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState,
-                           buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0,
+                           metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                            mPointerGesture.lastGestureProperties, mPointerGesture.lastGestureCoords,
                            mPointerGesture.lastGestureIdToIndex, dispatchedGestureIdBits, -1, 0, 0,
                            mPointerGesture.downTime);
@@ -2459,9 +2468,9 @@
             while (!upGestureIdBits.isEmpty()) {
                 uint32_t id = upGestureIdBits.clearFirstMarkedBit();
 
-                dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
-                               metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
-                               mPointerGesture.lastGestureProperties,
+                dispatchMotion(when, readTime, policyFlags, mSource,
+                               AMOTION_EVENT_ACTION_POINTER_UP, 0, 0, metaState, buttonState,
+                               AMOTION_EVENT_EDGE_FLAG_NONE, mPointerGesture.lastGestureProperties,
                                mPointerGesture.lastGestureCoords,
                                mPointerGesture.lastGestureIdToIndex, dispatchedGestureIdBits, id, 0,
                                0, mPointerGesture.downTime);
@@ -2473,8 +2482,8 @@
 
     // Send motion events for all pointers that moved.
     if (moveNeeded) {
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState,
-                       buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_MOVE, 0, 0,
+                       metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                        mPointerGesture.currentGestureProperties,
                        mPointerGesture.currentGestureCoords,
                        mPointerGesture.currentGestureIdToIndex, dispatchedGestureIdBits, -1, 0, 0,
@@ -2493,8 +2502,9 @@
                 mPointerGesture.downTime = when;
             }
 
-            dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0,
-                           metaState, buttonState, 0, mPointerGesture.currentGestureProperties,
+            dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_POINTER_DOWN,
+                           0, 0, metaState, buttonState, 0,
+                           mPointerGesture.currentGestureProperties,
                            mPointerGesture.currentGestureCoords,
                            mPointerGesture.currentGestureIdToIndex, dispatchedGestureIdBits, id, 0,
                            0, mPointerGesture.downTime);
@@ -2503,8 +2513,8 @@
 
     // Send motion events for hover.
     if (mPointerGesture.currentGestureMode == PointerGesture::Mode::HOVER) {
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
-                       buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
+                       metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                        mPointerGesture.currentGestureProperties,
                        mPointerGesture.currentGestureCoords,
                        mPointerGesture.currentGestureIdToIndex,
@@ -2528,11 +2538,11 @@
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
 
         const int32_t displayId = mPointerController->getDisplayId();
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
-                              buttonState, MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE,
-                              1, &pointerProperties, &pointerCoords, 0, 0, x, y,
-                              mPointerGesture.downTime, /* videoFrames */ {});
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
+                              metaState, buttonState, MotionClassification::NONE,
+                              AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties, &pointerCoords,
+                              0, 0, x, y, mPointerGesture.downTime, /* videoFrames */ {});
         getListener()->notifyMotion(&args);
     }
 
@@ -2554,13 +2564,13 @@
     }
 }
 
-void TouchInputMapper::abortPointerGestures(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::abortPointerGestures(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     // Cancel previously dispatches pointers.
     if (!mPointerGesture.lastGestureIdBits.isEmpty()) {
         int32_t metaState = getContext()->getGlobalMetaState();
         int32_t buttonState = mCurrentRawState.buttonState;
-        dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState,
-                       buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+        dispatchMotion(when, readTime, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0,
+                       metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
                        mPointerGesture.lastGestureProperties, mPointerGesture.lastGestureCoords,
                        mPointerGesture.lastGestureIdToIndex, mPointerGesture.lastGestureIdBits, -1,
                        0, 0, mPointerGesture.downTime);
@@ -3335,7 +3345,7 @@
     return true;
 }
 
-void TouchInputMapper::dispatchPointerStylus(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchPointerStylus(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     mPointerSimple.currentCoords.clear();
     mPointerSimple.currentProperties.clear();
 
@@ -3363,14 +3373,14 @@
         hovering = false;
     }
 
-    dispatchPointerSimple(when, policyFlags, down, hovering);
+    dispatchPointerSimple(when, readTime, policyFlags, down, hovering);
 }
 
-void TouchInputMapper::abortPointerStylus(nsecs_t when, uint32_t policyFlags) {
-    abortPointerSimple(when, policyFlags);
+void TouchInputMapper::abortPointerStylus(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
+    abortPointerSimple(when, readTime, policyFlags);
 }
 
-void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::dispatchPointerMouse(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     mPointerSimple.currentCoords.clear();
     mPointerSimple.currentProperties.clear();
 
@@ -3417,17 +3427,17 @@
         hovering = false;
     }
 
-    dispatchPointerSimple(when, policyFlags, down, hovering);
+    dispatchPointerSimple(when, readTime, policyFlags, down, hovering);
 }
 
-void TouchInputMapper::abortPointerMouse(nsecs_t when, uint32_t policyFlags) {
-    abortPointerSimple(when, policyFlags);
+void TouchInputMapper::abortPointerMouse(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
+    abortPointerSimple(when, readTime, policyFlags);
 
     mPointerVelocityControl.reset();
 }
 
-void TouchInputMapper::dispatchPointerSimple(nsecs_t when, uint32_t policyFlags, bool down,
-                                             bool hovering) {
+void TouchInputMapper::dispatchPointerSimple(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
+                                             bool down, bool hovering) {
     int32_t metaState = getContext()->getGlobalMetaState();
 
     if (down || hovering) {
@@ -3448,8 +3458,8 @@
         mPointerSimple.down = false;
 
         // Send up.
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, AMOTION_EVENT_ACTION_UP, 0, 0, metaState,
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, AMOTION_EVENT_ACTION_UP, 0, 0, metaState,
                               mLastRawState.buttonState, MotionClassification::NONE,
                               AMOTION_EVENT_EDGE_FLAG_NONE, 1, &mPointerSimple.lastProperties,
                               &mPointerSimple.lastCoords, mOrientedXPrecision, mOrientedYPrecision,
@@ -3462,9 +3472,9 @@
         mPointerSimple.hovering = false;
 
         // Send hover exit.
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState,
-                              mLastRawState.buttonState, MotionClassification::NONE,
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0,
+                              metaState, mLastRawState.buttonState, MotionClassification::NONE,
                               AMOTION_EVENT_EDGE_FLAG_NONE, 1, &mPointerSimple.lastProperties,
                               &mPointerSimple.lastCoords, mOrientedXPrecision, mOrientedYPrecision,
                               xCursorPosition, yCursorPosition, mPointerSimple.downTime,
@@ -3478,7 +3488,7 @@
             mPointerSimple.downTime = when;
 
             // Send down.
-            NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource,
+            NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
                                   displayId, policyFlags, AMOTION_EVENT_ACTION_DOWN, 0, 0,
                                   metaState, mCurrentRawState.buttonState,
                                   MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, 1,
@@ -3489,8 +3499,8 @@
         }
 
         // Send move.
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState,
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState,
                               mCurrentRawState.buttonState, MotionClassification::NONE,
                               AMOTION_EVENT_EDGE_FLAG_NONE, 1, &mPointerSimple.currentProperties,
                               &mPointerSimple.currentCoords, mOrientedXPrecision,
@@ -3504,7 +3514,7 @@
             mPointerSimple.hovering = true;
 
             // Send hover enter.
-            NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource,
+            NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
                                   displayId, policyFlags, AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0,
                                   metaState, mCurrentRawState.buttonState,
                                   MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE, 1,
@@ -3515,9 +3525,9 @@
         }
 
         // Send hover move.
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
-                              mCurrentRawState.buttonState, MotionClassification::NONE,
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
+                              metaState, mCurrentRawState.buttonState, MotionClassification::NONE,
                               AMOTION_EVENT_EDGE_FLAG_NONE, 1, &mPointerSimple.currentProperties,
                               &mPointerSimple.currentCoords, mOrientedXPrecision,
                               mOrientedYPrecision, xCursorPosition, yCursorPosition,
@@ -3537,8 +3547,8 @@
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
 
-        NotifyMotionArgs args(getContext()->getNextId(), when, getDeviceId(), mSource, displayId,
-                              policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState,
+        NotifyMotionArgs args(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
+                              displayId, policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState,
                               mCurrentRawState.buttonState, MotionClassification::NONE,
                               AMOTION_EVENT_EDGE_FLAG_NONE, 1, &mPointerSimple.currentProperties,
                               &pointerCoords, mOrientedXPrecision, mOrientedYPrecision,
@@ -3556,17 +3566,17 @@
     }
 }
 
-void TouchInputMapper::abortPointerSimple(nsecs_t when, uint32_t policyFlags) {
+void TouchInputMapper::abortPointerSimple(nsecs_t when, nsecs_t readTime, uint32_t policyFlags) {
     mPointerSimple.currentCoords.clear();
     mPointerSimple.currentProperties.clear();
 
-    dispatchPointerSimple(when, policyFlags, false, false);
+    dispatchPointerSimple(when, readTime, policyFlags, false, false);
 }
 
-void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
-                                      int32_t action, int32_t actionButton, int32_t flags,
-                                      int32_t metaState, int32_t buttonState, int32_t edgeFlags,
-                                      const PointerProperties* properties,
+void TouchInputMapper::dispatchMotion(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
+                                      uint32_t source, int32_t action, int32_t actionButton,
+                                      int32_t flags, int32_t metaState, int32_t buttonState,
+                                      int32_t edgeFlags, const PointerProperties* properties,
                                       const PointerCoords* coords, const uint32_t* idToIndex,
                                       BitSet32 idBits, int32_t changedId, float xPrecision,
                                       float yPrecision, nsecs_t downTime) {
@@ -3615,8 +3625,8 @@
     std::vector<TouchVideoFrame> frames = getDeviceContext().getVideoFrames();
     std::for_each(frames.begin(), frames.end(),
                   [this](TouchVideoFrame& frame) { frame.rotate(this->mSurfaceOrientation); });
-    NotifyMotionArgs args(getContext()->getNextId(), when, deviceId, source, displayId, policyFlags,
-                          action, actionButton, flags, metaState, buttonState,
+    NotifyMotionArgs args(getContext()->getNextId(), when, readTime, deviceId, source, displayId,
+                          policyFlags, action, actionButton, flags, metaState, buttonState,
                           MotionClassification::NONE, edgeFlags, pointerCount, pointerProperties,
                           pointerCoords, xPrecision, yPrecision, xCursorPosition, yCursorPosition,
                           downTime, std::move(frames));
@@ -3653,9 +3663,9 @@
     return changed;
 }
 
-void TouchInputMapper::cancelTouch(nsecs_t when) {
-    abortPointerUsage(when, 0 /*policyFlags*/);
-    abortTouches(when, 0 /* policyFlags*/);
+void TouchInputMapper::cancelTouch(nsecs_t when, nsecs_t readTime) {
+    abortPointerUsage(when, readTime, 0 /*policyFlags*/);
+    abortTouches(when, readTime, 0 /* policyFlags*/);
 }
 
 // Transform raw coordinate to surface coordinate
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.h b/services/inputflinger/reader/mapper/TouchInputMapper.h
index 6621825..cb52e2d 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.h
@@ -150,7 +150,7 @@
     bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes, const int32_t* keyCodes,
                                uint8_t* outFlags) override;
 
-    void cancelTouch(nsecs_t when) override;
+    void cancelTouch(nsecs_t when, nsecs_t readTime) override;
     void timeoutExpired(nsecs_t when) override;
     void updateExternalStylusState(const StylusState& state) override;
     std::optional<int32_t> getAssociatedDisplayId() override;
@@ -298,6 +298,7 @@
 
     struct RawState {
         nsecs_t when;
+        nsecs_t readTime;
 
         // Raw pointer sample data.
         RawPointerData rawPointerData;
@@ -310,6 +311,7 @@
 
         void copyFrom(const RawState& other) {
             when = other.when;
+            readTime = other.readTime;
             rawPointerData.copyFrom(other.rawPointerData);
             buttonState = other.buttonState;
             rawVScroll = other.rawVScroll;
@@ -318,6 +320,7 @@
 
         void clear() {
             when = 0;
+            readTime = 0;
             rawPointerData.clear();
             buttonState = 0;
             rawVScroll = 0;
@@ -702,39 +705,42 @@
     void resetExternalStylus();
     void clearStylusDataPendingFlags();
 
-    void sync(nsecs_t when);
+    void sync(nsecs_t when, nsecs_t readTime);
 
-    bool consumeRawTouches(nsecs_t when, uint32_t policyFlags);
+    bool consumeRawTouches(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
     void processRawTouches(bool timeout);
-    void cookAndDispatch(nsecs_t when);
-    void dispatchVirtualKey(nsecs_t when, uint32_t policyFlags, int32_t keyEventAction,
-                            int32_t keyEventFlags);
+    void cookAndDispatch(nsecs_t when, nsecs_t readTime);
+    void dispatchVirtualKey(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
+                            int32_t keyEventAction, int32_t keyEventFlags);
 
-    void dispatchTouches(nsecs_t when, uint32_t policyFlags);
-    void dispatchHoverExit(nsecs_t when, uint32_t policyFlags);
-    void dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags);
-    void dispatchButtonRelease(nsecs_t when, uint32_t policyFlags);
-    void dispatchButtonPress(nsecs_t when, uint32_t policyFlags);
+    void dispatchTouches(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
+    void dispatchHoverExit(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
+    void dispatchHoverEnterAndMove(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
+    void dispatchButtonRelease(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
+    void dispatchButtonPress(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
     const BitSet32& findActiveIdBits(const CookedPointerData& cookedPointerData);
     void cookPointerData();
-    void abortTouches(nsecs_t when, uint32_t policyFlags);
+    void abortTouches(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
 
-    void dispatchPointerUsage(nsecs_t when, uint32_t policyFlags, PointerUsage pointerUsage);
-    void abortPointerUsage(nsecs_t when, uint32_t policyFlags);
+    void dispatchPointerUsage(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
+                              PointerUsage pointerUsage);
+    void abortPointerUsage(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
 
-    void dispatchPointerGestures(nsecs_t when, uint32_t policyFlags, bool isTimeout);
-    void abortPointerGestures(nsecs_t when, uint32_t policyFlags);
+    void dispatchPointerGestures(nsecs_t when, nsecs_t readTime, uint32_t policyFlags,
+                                 bool isTimeout);
+    void abortPointerGestures(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
     bool preparePointerGestures(nsecs_t when, bool* outCancelPreviousGesture,
                                 bool* outFinishPreviousGesture, bool isTimeout);
 
-    void dispatchPointerStylus(nsecs_t when, uint32_t policyFlags);
-    void abortPointerStylus(nsecs_t when, uint32_t policyFlags);
+    void dispatchPointerStylus(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
+    void abortPointerStylus(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
 
-    void dispatchPointerMouse(nsecs_t when, uint32_t policyFlags);
-    void abortPointerMouse(nsecs_t when, uint32_t policyFlags);
+    void dispatchPointerMouse(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
+    void abortPointerMouse(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
 
-    void dispatchPointerSimple(nsecs_t when, uint32_t policyFlags, bool down, bool hovering);
-    void abortPointerSimple(nsecs_t when, uint32_t policyFlags);
+    void dispatchPointerSimple(nsecs_t when, nsecs_t readTime, uint32_t policyFlags, bool down,
+                               bool hovering);
+    void abortPointerSimple(nsecs_t when, nsecs_t readTime, uint32_t policyFlags);
 
     bool assignExternalStylusId(const RawState& state, bool timeout);
     void applyExternalStylusButtonState(nsecs_t when);
@@ -744,9 +750,9 @@
     // If the changedId is >= 0 and the action is POINTER_DOWN or POINTER_UP, the
     // method will take care of setting the index and transmuting the action to DOWN or UP
     // it is the first / last pointer to go down / up.
-    void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source, int32_t action,
-                        int32_t actionButton, int32_t flags, int32_t metaState, int32_t buttonState,
-                        int32_t edgeFlags, const PointerProperties* properties,
+    void dispatchMotion(nsecs_t when, nsecs_t readTime, uint32_t policyFlags, uint32_t source,
+                        int32_t action, int32_t actionButton, int32_t flags, int32_t metaState,
+                        int32_t buttonState, int32_t edgeFlags, const PointerProperties* properties,
                         const PointerCoords* coords, const uint32_t* idToIndex, BitSet32 idBits,
                         int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime);
 
diff --git a/services/inputflinger/tests/InputClassifierConverter_test.cpp b/services/inputflinger/tests/InputClassifierConverter_test.cpp
index f58b628..c0ada9d 100644
--- a/services/inputflinger/tests/InputClassifierConverter_test.cpp
+++ b/services/inputflinger/tests/InputClassifierConverter_test.cpp
@@ -38,13 +38,13 @@
     coords.setAxisValue(AMOTION_EVENT_AXIS_Y, 2);
     coords.setAxisValue(AMOTION_EVENT_AXIS_SIZE, 0.5);
     static constexpr nsecs_t downTime = 2;
-    NotifyMotionArgs motionArgs(1 /*sequenceNum*/, downTime /*eventTime*/, 3 /*deviceId*/,
-                                AINPUT_SOURCE_ANY, ADISPLAY_ID_DEFAULT, 4 /*policyFlags*/,
-                                AMOTION_EVENT_ACTION_DOWN, 0 /*actionButton*/, 0 /*flags*/,
-                                AMETA_NONE, 0 /*buttonState*/, MotionClassification::NONE,
-                                AMOTION_EVENT_EDGE_FLAG_NONE, 1 /*pointerCount*/, &properties,
-                                &coords, 0 /*xPrecision*/, 0 /*yPrecision*/,
-                                AMOTION_EVENT_INVALID_CURSOR_POSITION,
+    NotifyMotionArgs motionArgs(1 /*sequenceNum*/, downTime /*eventTime*/, 2 /*readTime*/,
+                                3 /*deviceId*/, AINPUT_SOURCE_ANY, ADISPLAY_ID_DEFAULT,
+                                4 /*policyFlags*/, AMOTION_EVENT_ACTION_DOWN, 0 /*actionButton*/,
+                                0 /*flags*/, AMETA_NONE, 0 /*buttonState*/,
+                                MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE,
+                                1 /*pointerCount*/, &properties, &coords, 0 /*xPrecision*/,
+                                0 /*yPrecision*/, AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                 AMOTION_EVENT_INVALID_CURSOR_POSITION, downTime,
                                 {} /*videoFrames*/);
     return motionArgs;
diff --git a/services/inputflinger/tests/InputClassifier_test.cpp b/services/inputflinger/tests/InputClassifier_test.cpp
index ab74a04..a72df01 100644
--- a/services/inputflinger/tests/InputClassifier_test.cpp
+++ b/services/inputflinger/tests/InputClassifier_test.cpp
@@ -41,13 +41,13 @@
     coords.setAxisValue(AMOTION_EVENT_AXIS_X, 1);
     coords.setAxisValue(AMOTION_EVENT_AXIS_Y, 1);
     static constexpr nsecs_t downTime = 2;
-    NotifyMotionArgs motionArgs(1 /*sequenceNum*/, downTime /*eventTime*/, 3 /*deviceId*/,
-                                AINPUT_SOURCE_ANY, ADISPLAY_ID_DEFAULT, 4 /*policyFlags*/,
-                                AMOTION_EVENT_ACTION_DOWN, 0 /*actionButton*/, 0 /*flags*/,
-                                AMETA_NONE, 0 /*buttonState*/, MotionClassification::NONE,
-                                AMOTION_EVENT_EDGE_FLAG_NONE, 1 /*pointerCount*/, &properties,
-                                &coords, 0 /*xPrecision*/, 0 /*yPrecision*/,
-                                AMOTION_EVENT_INVALID_CURSOR_POSITION,
+    NotifyMotionArgs motionArgs(1 /*sequenceNum*/, downTime /*eventTime*/, 2 /*readTime*/,
+                                3 /*deviceId*/, AINPUT_SOURCE_ANY, ADISPLAY_ID_DEFAULT,
+                                4 /*policyFlags*/, AMOTION_EVENT_ACTION_DOWN, 0 /*actionButton*/,
+                                0 /*flags*/, AMETA_NONE, 0 /*buttonState*/,
+                                MotionClassification::NONE, AMOTION_EVENT_EDGE_FLAG_NONE,
+                                1 /*pointerCount*/, &properties, &coords, 0 /*xPrecision*/,
+                                0 /*yPrecision*/, AMOTION_EVENT_INVALID_CURSOR_POSITION,
                                 AMOTION_EVENT_INVALID_CURSOR_POSITION, downTime,
                                 {} /*videoFrames*/);
     return motionArgs;
@@ -85,9 +85,10 @@
 
 TEST_F(InputClassifierTest, SendToNextStage_NotifyKeyArgs) {
     // Create a basic key event and send to classifier
-    NotifyKeyArgs args(1/*sequenceNum*/, 2/*eventTime*/, 3/*deviceId*/, AINPUT_SOURCE_KEYBOARD,
-            ADISPLAY_ID_DEFAULT, 0/*policyFlags*/, AKEY_EVENT_ACTION_DOWN, 4/*flags*/,
-            AKEYCODE_HOME, 5/*scanCode*/, AMETA_NONE, 6/*downTime*/);
+    NotifyKeyArgs args(1 /*sequenceNum*/, 2 /*eventTime*/, 21 /*readTime*/, 3 /*deviceId*/,
+                       AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_DEFAULT, 0 /*policyFlags*/,
+                       AKEY_EVENT_ACTION_DOWN, 4 /*flags*/, AKEYCODE_HOME, 5 /*scanCode*/,
+                       AMETA_NONE, 6 /*downTime*/);
 
     mClassifier->notifyKey(&args);
     NotifyKeyArgs outArgs;
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index dd044ca..0fef8a3 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -1232,9 +1232,9 @@
 static NotifyKeyArgs generateKeyArgs(int32_t action, int32_t displayId = ADISPLAY_ID_NONE) {
     nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
     // Define a valid key event.
-    NotifyKeyArgs args(/* id */ 0, currentTime, DEVICE_ID, AINPUT_SOURCE_KEYBOARD, displayId,
-                       POLICY_FLAG_PASS_TO_USER, action, /* flags */ 0, AKEYCODE_A, KEY_A,
-                       AMETA_NONE, currentTime);
+    NotifyKeyArgs args(/* id */ 0, currentTime, 0 /*readTime*/, DEVICE_ID, AINPUT_SOURCE_KEYBOARD,
+                       displayId, POLICY_FLAG_PASS_TO_USER, action, /* flags */ 0, AKEYCODE_A,
+                       KEY_A, AMETA_NONE, currentTime);
 
     return args;
 }
@@ -1261,7 +1261,7 @@
 
     nsecs_t currentTime = systemTime(SYSTEM_TIME_MONOTONIC);
     // Define a valid motion event.
-    NotifyMotionArgs args(/* id */ 0, currentTime, DEVICE_ID, source, displayId,
+    NotifyMotionArgs args(/* id */ 0, currentTime, 0 /*readTime*/, DEVICE_ID, source, displayId,
                           POLICY_FLAG_PASS_TO_USER, action, /* actionButton */ 0, /* flags */ 0,
                           AMETA_NONE, /* buttonState */ 0, MotionClassification::NONE,
                           AMOTION_EVENT_EDGE_FLAG_NONE, pointerCount, pointerProperties,
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 409c62a..f626563 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -48,7 +48,8 @@
 static constexpr std::chrono::duration WAIT_TIMEOUT = 100ms;
 
 // An arbitrary time value.
-static const nsecs_t ARBITRARY_TIME = 1234;
+static constexpr nsecs_t ARBITRARY_TIME = 1234;
+static constexpr nsecs_t READ_TIME = 4321;
 
 // Arbitrary display properties.
 static constexpr int32_t DISPLAY_ID = 0;
@@ -427,14 +428,14 @@
         device->identifier.name = name;
         mDevices.add(deviceId, device);
 
-        enqueueEvent(ARBITRARY_TIME, deviceId, EventHubInterface::DEVICE_ADDED, 0, 0);
+        enqueueEvent(ARBITRARY_TIME, READ_TIME, deviceId, EventHubInterface::DEVICE_ADDED, 0, 0);
     }
 
     void removeDevice(int32_t deviceId) {
         delete mDevices.valueFor(deviceId);
         mDevices.removeItem(deviceId);
 
-        enqueueEvent(ARBITRARY_TIME, deviceId, EventHubInterface::DEVICE_REMOVED, 0, 0);
+        enqueueEvent(ARBITRARY_TIME, READ_TIME, deviceId, EventHubInterface::DEVICE_REMOVED, 0, 0);
     }
 
     bool isDeviceEnabled(int32_t deviceId) {
@@ -475,7 +476,7 @@
     }
 
     void finishDeviceScan() {
-        enqueueEvent(ARBITRARY_TIME, 0, EventHubInterface::FINISHED_DEVICE_SCAN, 0, 0);
+        enqueueEvent(ARBITRARY_TIME, READ_TIME, 0, EventHubInterface::FINISHED_DEVICE_SCAN, 0, 0);
     }
 
     void addConfigurationProperty(int32_t deviceId, const String8& key, const String8& value) {
@@ -576,11 +577,12 @@
         device->virtualKeys.push_back(definition);
     }
 
-    void enqueueEvent(nsecs_t when, int32_t deviceId, int32_t type,
-            int32_t code, int32_t value) {
+    void enqueueEvent(nsecs_t when, nsecs_t readTime, int32_t deviceId, int32_t type, int32_t code,
+                      int32_t value) {
         std::scoped_lock<std::mutex> lock(mLock);
         RawEvent event;
         event.when = when;
+        event.readTime = readTime;
         event.deviceId = deviceId;
         event.type = type;
         event.code = code;
@@ -1704,18 +1706,21 @@
 TEST_F(InputReaderTest, LoopOnce_ForwardsRawEventsToMappers) {
     constexpr int32_t deviceId = END_RESERVED_ID + 1000;
     constexpr Flags<InputDeviceClass> deviceClass = InputDeviceClass::KEYBOARD;
+    constexpr nsecs_t when = 0;
     constexpr int32_t eventHubId = 1;
+    constexpr nsecs_t readTime = 2;
     FakeInputMapper& mapper =
             addDeviceWithFakeInputMapper(deviceId, eventHubId, "fake", deviceClass,
                                          AINPUT_SOURCE_KEYBOARD, nullptr);
 
-    mFakeEventHub->enqueueEvent(0, eventHubId, EV_KEY, KEY_A, 1);
+    mFakeEventHub->enqueueEvent(when, readTime, eventHubId, EV_KEY, KEY_A, 1);
     mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeEventHub->assertQueueIsEmpty());
 
     RawEvent event;
     ASSERT_NO_FATAL_FAILURE(mapper.assertProcessWasCalled(&event));
-    ASSERT_EQ(0, event.when);
+    ASSERT_EQ(when, event.when);
+    ASSERT_EQ(readTime, event.readTime);
     ASSERT_EQ(eventHubId, event.deviceId);
     ASSERT_EQ(EV_KEY, event.type);
     ASSERT_EQ(KEY_A, event.code);
@@ -2080,12 +2085,14 @@
     ASSERT_NE(prevId, keyArgs.id);
     prevId = keyArgs.id;
     ASSERT_LE(prevTimestamp, keyArgs.eventTime);
+    ASSERT_LE(keyArgs.eventTime, keyArgs.readTime);
     prevTimestamp = keyArgs.eventTime;
 
     ASSERT_NO_FATAL_FAILURE(mTestListener->assertNotifyKeyWasCalled(&keyArgs));
     ASSERT_EQ(AKEY_EVENT_ACTION_UP, keyArgs.action);
     ASSERT_NE(prevId, keyArgs.id);
     ASSERT_LE(prevTimestamp, keyArgs.eventTime);
+    ASSERT_LE(keyArgs.eventTime, keyArgs.readTime);
 }
 
 /**
@@ -2562,9 +2569,11 @@
         mFakePolicy->clearViewports();
     }
 
-    void process(InputMapper& mapper, nsecs_t when, int32_t type, int32_t code, int32_t value) {
+    void process(InputMapper& mapper, nsecs_t when, nsecs_t readTime, int32_t type, int32_t code,
+                 int32_t value) {
         RawEvent event;
         event.when = when;
+        event.readTime = readTime;
         event.deviceId = mapper.getDeviceContext().getEventHubId();
         event.type = type;
         event.code = code;
@@ -2643,10 +2652,10 @@
 TEST_F(SwitchInputMapperTest, Process) {
     SwitchInputMapper& mapper = addMapperAndConfigure<SwitchInputMapper>();
 
-    process(mapper, ARBITRARY_TIME, EV_SW, SW_LID, 1);
-    process(mapper, ARBITRARY_TIME, EV_SW, SW_JACK_PHYSICAL_INSERT, 1);
-    process(mapper, ARBITRARY_TIME, EV_SW, SW_HEADPHONE_INSERT, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SW, SW_LID, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SW, SW_JACK_PHYSICAL_INSERT, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SW, SW_HEADPHONE_INSERT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
 
     NotifySwitchArgs args;
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifySwitchWasCalled(&args));
@@ -2816,11 +2825,11 @@
                                     std::chrono::microseconds(10000),
                                     std::chrono::microseconds(0)));
     ASSERT_TRUE(mFakeEventHub->isDeviceEnabled(EVENTHUB_ID));
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_X, 20000);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_Y, -20000);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_Z, 40000);
-    process(mapper, ARBITRARY_TIME, EV_MSC, MSC_TIMESTAMP, 1000);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_X, 20000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_Y, -20000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_Z, 40000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_MSC, MSC_TIMESTAMP, 1000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
 
     NotifySensorArgs args;
     std::vector<float> values = {20000.0f / ACCEL_RAW_RESOLUTION * GRAVITY_MS2_UNIT,
@@ -2846,11 +2855,11 @@
                                     std::chrono::microseconds(10000),
                                     std::chrono::microseconds(0)));
     ASSERT_TRUE(mFakeEventHub->isDeviceEnabled(EVENTHUB_ID));
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_RX, 20000);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_RY, -20000);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_RZ, 40000);
-    process(mapper, ARBITRARY_TIME, EV_MSC, MSC_TIMESTAMP, 1000);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_RX, 20000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_RY, -20000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_RZ, 40000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_MSC, MSC_TIMESTAMP, 1000);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
 
     NotifySensorArgs args;
     std::vector<float> values = {20000.0f / GYRO_RAW_RESOLUTION * DEGREE_RADIAN_UNIT,
@@ -2919,14 +2928,14 @@
                                                   int32_t rotatedKeyCode, int32_t displayId) {
     NotifyKeyArgs args;
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, originalScanCode, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, originalScanCode, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, args.action);
     ASSERT_EQ(originalScanCode, args.scanCode);
     ASSERT_EQ(rotatedKeyCode, args.keyCode);
     ASSERT_EQ(displayId, args.displayId);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, originalScanCode, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, originalScanCode, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AKEY_EVENT_ACTION_UP, args.action);
     ASSERT_EQ(originalScanCode, args.scanCode);
@@ -2959,7 +2968,7 @@
     mapper.updateMetaState(AKEYCODE_NUM_LOCK);
 
     // Key down by scan code.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_HOME, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_HOME, 1);
     NotifyKeyArgs args;
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DEVICE_ID, args.deviceId);
@@ -2974,7 +2983,7 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 
     // Key up by scan code.
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_HOME, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_HOME, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DEVICE_ID, args.deviceId);
     ASSERT_EQ(AINPUT_SOURCE_KEYBOARD, args.source);
@@ -2988,8 +2997,8 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 
     // Key down by usage code.
-    process(mapper, ARBITRARY_TIME, EV_MSC, MSC_SCAN, USAGE_A);
-    process(mapper, ARBITRARY_TIME, EV_KEY, 0, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_MSC, MSC_SCAN, USAGE_A);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, 0, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DEVICE_ID, args.deviceId);
     ASSERT_EQ(AINPUT_SOURCE_KEYBOARD, args.source);
@@ -3003,8 +3012,8 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 
     // Key up by usage code.
-    process(mapper, ARBITRARY_TIME, EV_MSC, MSC_SCAN, USAGE_A);
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, 0, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_MSC, MSC_SCAN, USAGE_A);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, 0, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DEVICE_ID, args.deviceId);
     ASSERT_EQ(AINPUT_SOURCE_KEYBOARD, args.source);
@@ -3018,8 +3027,8 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 
     // Key down with unknown scan code or usage code.
-    process(mapper, ARBITRARY_TIME, EV_MSC, MSC_SCAN, USAGE_UNKNOWN);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UNKNOWN, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_MSC, MSC_SCAN, USAGE_UNKNOWN);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UNKNOWN, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DEVICE_ID, args.deviceId);
     ASSERT_EQ(AINPUT_SOURCE_KEYBOARD, args.source);
@@ -3033,8 +3042,8 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 
     // Key up with unknown scan code or usage code.
-    process(mapper, ARBITRARY_TIME, EV_MSC, MSC_SCAN, USAGE_UNKNOWN);
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_UNKNOWN, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_MSC, MSC_SCAN, USAGE_UNKNOWN);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_UNKNOWN, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DEVICE_ID, args.deviceId);
     ASSERT_EQ(AINPUT_SOURCE_KEYBOARD, args.source);
@@ -3048,6 +3057,28 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 }
 
+/**
+ * Ensure that the readTime is set to the time when the EV_KEY is received.
+ */
+TEST_F(KeyboardInputMapperTest, Process_SendsReadTime) {
+    mFakeEventHub->addKey(EVENTHUB_ID, KEY_HOME, 0, AKEYCODE_HOME, POLICY_FLAG_WAKE);
+
+    KeyboardInputMapper& mapper =
+            addMapperAndConfigure<KeyboardInputMapper>(AINPUT_SOURCE_KEYBOARD,
+                                                       AINPUT_KEYBOARD_TYPE_ALPHABETIC);
+    NotifyKeyArgs args;
+
+    // Key down
+    process(mapper, ARBITRARY_TIME, 12 /*readTime*/, EV_KEY, KEY_HOME, 1);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
+    ASSERT_EQ(12, args.readTime);
+
+    // Key up
+    process(mapper, ARBITRARY_TIME, 15 /*readTime*/, EV_KEY, KEY_HOME, 1);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
+    ASSERT_EQ(15, args.readTime);
+}
+
 TEST_F(KeyboardInputMapperTest, Process_ShouldUpdateMetaState) {
     mFakeEventHub->addKey(EVENTHUB_ID, KEY_LEFTSHIFT, 0, AKEYCODE_SHIFT_LEFT, 0);
     mFakeEventHub->addKey(EVENTHUB_ID, KEY_A, 0, AKEYCODE_A, 0);
@@ -3064,7 +3095,7 @@
     mapper.updateMetaState(AKEYCODE_NUM_LOCK);
 
     // Metakey down.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_LEFTSHIFT, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_LEFTSHIFT, 1);
     NotifyKeyArgs args;
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_ON, args.metaState);
@@ -3072,19 +3103,19 @@
     ASSERT_NO_FATAL_FAILURE(mReader->getContext()->assertUpdateGlobalMetaStateWasCalled());
 
     // Key down.
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_A, 1);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_A, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_ON, args.metaState);
     ASSERT_EQ(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_ON, mapper.getMetaState());
 
     // Key up.
-    process(mapper, ARBITRARY_TIME + 2, EV_KEY, KEY_A, 0);
+    process(mapper, ARBITRARY_TIME + 2, READ_TIME, EV_KEY, KEY_A, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_ON, args.metaState);
     ASSERT_EQ(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_ON, mapper.getMetaState());
 
     // Metakey up.
-    process(mapper, ARBITRARY_TIME + 3, EV_KEY, KEY_LEFTSHIFT, 0);
+    process(mapper, ARBITRARY_TIME + 3, READ_TIME, EV_KEY, KEY_LEFTSHIFT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AMETA_NONE, args.metaState);
     ASSERT_EQ(AMETA_NONE, mapper.getMetaState());
@@ -3171,7 +3202,7 @@
     NotifyKeyArgs args;
     clearViewports();
     prepareDisplay(DISPLAY_ORIENTATION_270);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, args.action);
     ASSERT_EQ(KEY_UP, args.scanCode);
@@ -3179,7 +3210,7 @@
 
     clearViewports();
     prepareDisplay(DISPLAY_ORIENTATION_180);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AKEY_EVENT_ACTION_UP, args.action);
     ASSERT_EQ(KEY_UP, args.scanCode);
@@ -3197,16 +3228,16 @@
     NotifyKeyArgs args;
 
     // Display id should be ADISPLAY_ID_NONE without any display configuration.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 0);
+    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);
 
     prepareDisplay(DISPLAY_ORIENTATION_0);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 0);
+    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);
 }
@@ -3227,9 +3258,9 @@
 
     setDisplayInfoAndReconfigure(DISPLAY_ID, DISPLAY_WIDTH, DISPLAY_HEIGHT, DISPLAY_ORIENTATION_0,
                                  UNIQUE_ID, NO_PORT, ViewportType::INTERNAL);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(DISPLAY_ID, args.displayId);
 
@@ -3237,9 +3268,9 @@
     clearViewports();
     setDisplayInfoAndReconfigure(newDisplayId, DISPLAY_WIDTH, DISPLAY_HEIGHT, DISPLAY_ORIENTATION_0,
                                  UNIQUE_ID, NO_PORT, ViewportType::INTERNAL);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_UP, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_UP, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(newDisplayId, args.displayId);
 }
@@ -3303,48 +3334,48 @@
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
 
     // Toggle caps lock on.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_CAPSLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_CAPSLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_CAPSLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_CAPSLOCK, 0);
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
     ASSERT_EQ(AMETA_CAPS_LOCK_ON, mapper.getMetaState());
 
     // Toggle num lock on.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_NUMLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_NUMLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_NUMLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_NUMLOCK, 0);
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
     ASSERT_EQ(AMETA_CAPS_LOCK_ON | AMETA_NUM_LOCK_ON, mapper.getMetaState());
 
     // Toggle caps lock off.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_CAPSLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_CAPSLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_CAPSLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_CAPSLOCK, 0);
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
     ASSERT_EQ(AMETA_NUM_LOCK_ON, mapper.getMetaState());
 
     // Toggle scroll lock on.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_SCROLLLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_SCROLLLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_SCROLLLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_SCROLLLOCK, 0);
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
     ASSERT_EQ(AMETA_NUM_LOCK_ON | AMETA_SCROLL_LOCK_ON, mapper.getMetaState());
 
     // Toggle num lock off.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_NUMLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_NUMLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_NUMLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_NUMLOCK, 0);
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
     ASSERT_EQ(AMETA_SCROLL_LOCK_ON, mapper.getMetaState());
 
     // Toggle scroll lock off.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_SCROLLLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_SCROLLLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_SCROLLLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_SCROLLLOCK, 0);
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
@@ -3372,7 +3403,7 @@
 
     NotifyKeyArgs args;
     // Press button "A"
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_A, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_A, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AMETA_NONE, args.metaState);
     ASSERT_EQ(AMETA_NONE, mapper.getMetaState());
@@ -3380,7 +3411,7 @@
     ASSERT_EQ(AKEYCODE_BUTTON_A, args.keyCode);
 
     // Button up.
-    process(mapper, ARBITRARY_TIME + 2, EV_KEY, BTN_A, 0);
+    process(mapper, ARBITRARY_TIME + 2, READ_TIME, EV_KEY, BTN_A, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(AMETA_NONE, args.metaState);
     ASSERT_EQ(AMETA_NONE, mapper.getMetaState());
@@ -3487,20 +3518,20 @@
     ASSERT_FALSE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
 
     // Toggle caps lock on.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_CAPSLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_CAPSLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_CAPSLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_CAPSLOCK, 0);
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_CAPSL));
     ASSERT_EQ(AMETA_CAPS_LOCK_ON, mapper.getMetaState());
 
     // Toggle num lock on.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_NUMLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_NUMLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_NUMLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_NUMLOCK, 0);
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_NUML));
     ASSERT_EQ(AMETA_CAPS_LOCK_ON | AMETA_NUM_LOCK_ON, mapper.getMetaState());
 
     // Toggle scroll lock on.
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_SCROLLLOCK, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_SCROLLLOCK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_SCROLLLOCK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_SCROLLLOCK, 0);
     ASSERT_TRUE(mFakeEventHub->getLedState(EVENTHUB_ID, LED_SCROLLL));
     ASSERT_EQ(AMETA_CAPS_LOCK_ON | AMETA_NUM_LOCK_ON | AMETA_SCROLL_LOCK_ON, mapper.getMetaState());
 
@@ -3555,28 +3586,28 @@
             addMapperAndConfigure<KeyboardInputMapper>(AINPUT_SOURCE_KEYBOARD,
                                                        AINPUT_KEYBOARD_TYPE_ALPHABETIC);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_HOME, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_HOME, 1);
     NotifyKeyArgs args;
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_HOME, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_HOME, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(uint32_t(0), args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_PLAY, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_PLAY, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(uint32_t(0), args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_PLAY, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_PLAY, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(uint32_t(0), args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_PLAYPAUSE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_PLAYPAUSE, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_PLAYPAUSE, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_PLAYPAUSE, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 }
@@ -3593,28 +3624,28 @@
             addMapperAndConfigure<KeyboardInputMapper>(AINPUT_SOURCE_KEYBOARD,
                                                        AINPUT_KEYBOARD_TYPE_ALPHABETIC);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_HOME, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_HOME, 1);
     NotifyKeyArgs args;
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_HOME, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_HOME, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_DOWN, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_DOWN, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(uint32_t(0), args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_DOWN, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_DOWN, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(uint32_t(0), args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, KEY_PLAY, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, KEY_PLAY, 1);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, KEY_PLAY, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, KEY_PLAY, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&args));
     ASSERT_EQ(POLICY_FLAG_WAKE, args.policyFlags);
 }
@@ -3652,9 +3683,9 @@
                                                int32_t rotatedY) {
     NotifyMotionArgs args;
 
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, originalX);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, originalY);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, originalX);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, originalY);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3735,8 +3766,8 @@
 
     // Button press.
     // Mostly testing non x/y behavior here so we don't need to check again elsewhere.
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MOUSE, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(ARBITRARY_TIME, args.eventTime);
     ASSERT_EQ(DEVICE_ID, args.deviceId);
@@ -3776,8 +3807,8 @@
     ASSERT_EQ(ARBITRARY_TIME, args.downTime);
 
     // Button release.  Should have same down time.
-    process(mapper, ARBITRARY_TIME + 1, EV_KEY, BTN_MOUSE, 0);
-    process(mapper, ARBITRARY_TIME + 1, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_KEY, BTN_MOUSE, 0);
+    process(mapper, ARBITRARY_TIME + 1, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(ARBITRARY_TIME + 1, args.eventTime);
     ASSERT_EQ(DEVICE_ID, args.deviceId);
@@ -3824,16 +3855,16 @@
     NotifyMotionArgs args;
 
     // Motion in X but not Y.
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
             1.0f / TRACKBALL_MOVEMENT_THRESHOLD, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // Motion in Y but not X.
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, -2);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, -2);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3847,8 +3878,8 @@
     NotifyMotionArgs args;
 
     // Button press.
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MOUSE, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3860,8 +3891,8 @@
             0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // Button release.
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MOUSE, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3880,10 +3911,10 @@
     NotifyMotionArgs args;
 
     // Combined X, Y and Button.
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 1);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, -2);
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MOUSE, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, -2);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3897,9 +3928,9 @@
             1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // Move X, Y a bit while pressed.
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 2);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 2);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3907,8 +3938,8 @@
             1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // Release Button.
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MOUSE, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, args.action);
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(args.pointerCoords[0],
@@ -3993,8 +4024,8 @@
     NotifyKeyArgs keyArgs;
 
     // press BTN_LEFT, release BTN_LEFT
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_LEFT, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_LEFT, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, motionArgs.action);
     ASSERT_EQ(AMOTION_EVENT_BUTTON_PRIMARY, motionArgs.buttonState);
@@ -4009,8 +4040,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_LEFT, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_LEFT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(0, motionArgs.buttonState);
@@ -4033,9 +4064,9 @@
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // press BTN_RIGHT + BTN_MIDDLE, release BTN_RIGHT, release BTN_MIDDLE
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_RIGHT, 1);
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MIDDLE, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_RIGHT, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MIDDLE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, motionArgs.action);
     ASSERT_EQ(AMOTION_EVENT_BUTTON_SECONDARY | AMOTION_EVENT_BUTTON_TERTIARY,
@@ -4062,8 +4093,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_RIGHT, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_RIGHT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(AMOTION_EVENT_BUTTON_TERTIARY, motionArgs.buttonState);
@@ -4078,16 +4109,16 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MIDDLE, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MIDDLE, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(0, motionArgs.buttonState);
     ASSERT_EQ(0, mFakePointerController->getButtonState());
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MIDDLE, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MIDDLE, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
 
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(0, motionArgs.buttonState);
@@ -4104,8 +4135,8 @@
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // press BTN_BACK, release BTN_BACK
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_BACK, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_BACK, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&keyArgs));
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, keyArgs.action);
     ASSERT_EQ(AKEYCODE_BACK, keyArgs.keyCode);
@@ -4124,8 +4155,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_BACK, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_BACK, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(0, motionArgs.buttonState);
@@ -4145,8 +4176,8 @@
     ASSERT_EQ(AKEYCODE_BACK, keyArgs.keyCode);
 
     // press BTN_SIDE, release BTN_SIDE
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_SIDE, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_SIDE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&keyArgs));
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, keyArgs.action);
     ASSERT_EQ(AKEYCODE_BACK, keyArgs.keyCode);
@@ -4165,8 +4196,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_SIDE, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_SIDE, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(0, motionArgs.buttonState);
@@ -4186,8 +4217,8 @@
     ASSERT_EQ(AKEYCODE_BACK, keyArgs.keyCode);
 
     // press BTN_FORWARD, release BTN_FORWARD
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_FORWARD, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_FORWARD, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&keyArgs));
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, keyArgs.action);
     ASSERT_EQ(AKEYCODE_FORWARD, keyArgs.keyCode);
@@ -4206,8 +4237,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_FORWARD, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_FORWARD, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(0, motionArgs.buttonState);
@@ -4227,8 +4258,8 @@
     ASSERT_EQ(AKEYCODE_FORWARD, keyArgs.keyCode);
 
     // press BTN_EXTRA, release BTN_EXTRA
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_EXTRA, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_EXTRA, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyKeyWasCalled(&keyArgs));
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, keyArgs.action);
     ASSERT_EQ(AKEYCODE_FORWARD, keyArgs.keyCode);
@@ -4247,8 +4278,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPointerCoords(motionArgs.pointerCoords[0],
             100.0f, 200.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_EXTRA, 0);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_EXTRA, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&motionArgs));
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, motionArgs.action);
     ASSERT_EQ(0, motionArgs.buttonState);
@@ -4278,9 +4309,9 @@
 
     NotifyMotionArgs args;
 
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 10);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, 20);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 10);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 20);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, args.action);
@@ -4306,9 +4337,9 @@
     NotifyMotionArgs args;
 
     // Move.
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 10);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, 20);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 10);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 20);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE_RELATIVE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
@@ -4317,8 +4348,8 @@
     ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 100.0f, 200.0f));
 
     // Button press.
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_MOUSE, 1);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_MOUSE, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE_RELATIVE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_DOWN, args.action);
@@ -4331,8 +4362,8 @@
             0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // Button release.
-    process(mapper, ARBITRARY_TIME + 2, EV_KEY, BTN_MOUSE, 0);
-    process(mapper, ARBITRARY_TIME + 2, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME + 2, READ_TIME, EV_KEY, BTN_MOUSE, 0);
+    process(mapper, ARBITRARY_TIME + 2, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE_RELATIVE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_BUTTON_RELEASE, args.action);
@@ -4345,9 +4376,9 @@
             0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f));
 
     // Another move.
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 30);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, 40);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 30);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 40);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE_RELATIVE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);
@@ -4366,9 +4397,9 @@
     ASSERT_EQ(ARBITRARY_TIME, resetArgs.eventTime);
     ASSERT_EQ(DEVICE_ID, resetArgs.deviceId);
 
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 10);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, 20);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 10);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 20);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, args.action);
@@ -4394,9 +4425,9 @@
     mFakePointerController->setButtonState(0);
 
     NotifyMotionArgs args;
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_X, 10);
-    process(mapper, ARBITRARY_TIME, EV_REL, REL_Y, 20);
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 10);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 20);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
     ASSERT_EQ(AINPUT_SOURCE_MOUSE, args.source);
     ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, args.action);
@@ -4619,46 +4650,46 @@
 }
 
 void SingleTouchInputMapperTest::processDown(SingleTouchInputMapper& mapper, int32_t x, int32_t y) {
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_TOUCH, 1);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_X, x);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_Y, y);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_TOUCH, 1);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_X, x);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_Y, y);
 }
 
 void SingleTouchInputMapperTest::processMove(SingleTouchInputMapper& mapper, int32_t x, int32_t y) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_X, x);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_Y, y);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_X, x);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_Y, y);
 }
 
 void SingleTouchInputMapperTest::processUp(SingleTouchInputMapper& mapper) {
-    process(mapper, ARBITRARY_TIME, EV_KEY, BTN_TOUCH, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, BTN_TOUCH, 0);
 }
 
 void SingleTouchInputMapperTest::processPressure(SingleTouchInputMapper& mapper, int32_t pressure) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_PRESSURE, pressure);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_PRESSURE, pressure);
 }
 
 void SingleTouchInputMapperTest::processToolMajor(SingleTouchInputMapper& mapper,
                                                   int32_t toolMajor) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_TOOL_WIDTH, toolMajor);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_TOOL_WIDTH, toolMajor);
 }
 
 void SingleTouchInputMapperTest::processDistance(SingleTouchInputMapper& mapper, int32_t distance) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_DISTANCE, distance);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_DISTANCE, distance);
 }
 
 void SingleTouchInputMapperTest::processTilt(SingleTouchInputMapper& mapper, int32_t tiltX,
                                              int32_t tiltY) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_TILT_X, tiltX);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_TILT_Y, tiltY);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_TILT_X, tiltX);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_TILT_Y, tiltY);
 }
 
 void SingleTouchInputMapperTest::processKey(SingleTouchInputMapper& mapper, int32_t code,
                                             int32_t value) {
-    process(mapper, ARBITRARY_TIME, EV_KEY, code, value);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, code, value);
 }
 
 void SingleTouchInputMapperTest::processSync(SingleTouchInputMapper& mapper) {
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
 }
 
 TEST_F(SingleTouchInputMapperTest, GetSources_WhenDeviceTypeIsNotSpecifiedAndNotACursor_ReturnsPointer) {
@@ -5946,64 +5977,64 @@
 
 void MultiTouchInputMapperTest::processPosition(MultiTouchInputMapper& mapper, int32_t x,
                                                 int32_t y) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_POSITION_X, x);
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_POSITION_Y, y);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_POSITION_X, x);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_POSITION_Y, y);
 }
 
 void MultiTouchInputMapperTest::processTouchMajor(MultiTouchInputMapper& mapper,
                                                   int32_t touchMajor) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_TOUCH_MAJOR, touchMajor);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_TOUCH_MAJOR, touchMajor);
 }
 
 void MultiTouchInputMapperTest::processTouchMinor(MultiTouchInputMapper& mapper,
                                                   int32_t touchMinor) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_TOUCH_MINOR, touchMinor);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_TOUCH_MINOR, touchMinor);
 }
 
 void MultiTouchInputMapperTest::processToolMajor(MultiTouchInputMapper& mapper, int32_t toolMajor) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_WIDTH_MAJOR, toolMajor);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_WIDTH_MAJOR, toolMajor);
 }
 
 void MultiTouchInputMapperTest::processToolMinor(MultiTouchInputMapper& mapper, int32_t toolMinor) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_WIDTH_MINOR, toolMinor);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_WIDTH_MINOR, toolMinor);
 }
 
 void MultiTouchInputMapperTest::processOrientation(MultiTouchInputMapper& mapper,
                                                    int32_t orientation) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_ORIENTATION, orientation);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_ORIENTATION, orientation);
 }
 
 void MultiTouchInputMapperTest::processPressure(MultiTouchInputMapper& mapper, int32_t pressure) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_PRESSURE, pressure);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_PRESSURE, pressure);
 }
 
 void MultiTouchInputMapperTest::processDistance(MultiTouchInputMapper& mapper, int32_t distance) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_DISTANCE, distance);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_DISTANCE, distance);
 }
 
 void MultiTouchInputMapperTest::processId(MultiTouchInputMapper& mapper, int32_t id) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_TRACKING_ID, id);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_TRACKING_ID, id);
 }
 
 void MultiTouchInputMapperTest::processSlot(MultiTouchInputMapper& mapper, int32_t slot) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_SLOT, slot);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_SLOT, slot);
 }
 
 void MultiTouchInputMapperTest::processToolType(MultiTouchInputMapper& mapper, int32_t toolType) {
-    process(mapper, ARBITRARY_TIME, EV_ABS, ABS_MT_TOOL_TYPE, toolType);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_ABS, ABS_MT_TOOL_TYPE, toolType);
 }
 
 void MultiTouchInputMapperTest::processKey(MultiTouchInputMapper& mapper, int32_t code,
                                            int32_t value) {
-    process(mapper, ARBITRARY_TIME, EV_KEY, code, value);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_KEY, code, value);
 }
 
 void MultiTouchInputMapperTest::processMTSync(MultiTouchInputMapper& mapper) {
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_MT_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_MT_REPORT, 0);
 }
 
 void MultiTouchInputMapperTest::processSync(MultiTouchInputMapper& mapper) {
-    process(mapper, ARBITRARY_TIME, EV_SYN, SYN_REPORT, 0);
+    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);
 }
 
 TEST_F(MultiTouchInputMapperTest, Process_NormalMultiTouchGesture_WithoutTrackingIds) {
@@ -7437,6 +7468,32 @@
 }
 
 /**
+ * Ensure that the readTime is set to the SYN_REPORT value when processing touch events.
+ */
+TEST_F(MultiTouchInputMapperTest, Process_SendsReadTime) {
+    addConfigurationProperty("touch.deviceType", "touchScreen");
+    prepareAxes(POSITION);
+    MultiTouchInputMapper& mapper = addMapperAndConfigure<MultiTouchInputMapper>();
+
+    prepareDisplay(DISPLAY_ORIENTATION_0);
+    process(mapper, 10, 11 /*readTime*/, EV_ABS, ABS_MT_TRACKING_ID, 1);
+    process(mapper, 15, 16 /*readTime*/, EV_ABS, ABS_MT_POSITION_X, 100);
+    process(mapper, 20, 21 /*readTime*/, EV_ABS, ABS_MT_POSITION_Y, 100);
+    process(mapper, 25, 26 /*readTime*/, EV_SYN, SYN_REPORT, 0);
+
+    NotifyMotionArgs args;
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+    ASSERT_EQ(26, args.readTime);
+
+    process(mapper, 30, 31 /*readTime*/, EV_ABS, ABS_MT_POSITION_X, 110);
+    process(mapper, 30, 32 /*readTime*/, EV_ABS, ABS_MT_POSITION_Y, 220);
+    process(mapper, 30, 33 /*readTime*/, EV_SYN, SYN_REPORT, 0);
+
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+    ASSERT_EQ(33, args.readTime);
+}
+
+/**
  * When the viewport is not active (isActive=false), the touch mapper should be disabled and the
  * events should not be delivered to the listener.
  */