diff --git a/services/inputflinger/InputListener.cpp b/services/inputflinger/InputListener.cpp
index 2ee222b..520fea4 100644
--- a/services/inputflinger/InputListener.cpp
+++ b/services/inputflinger/InputListener.cpp
@@ -69,13 +69,15 @@
 NotifyMotionArgs::NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source,
         uint32_t policyFlags,
         int32_t action, int32_t actionButton, int32_t flags, int32_t metaState,
-        int32_t buttonState, int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
+        int32_t buttonState, int32_t edgeFlags, int32_t displayId, uint32_t deviceTimestamp,
+        uint32_t pointerCount,
         const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
         float xPrecision, float yPrecision, nsecs_t downTime) :
         eventTime(eventTime), deviceId(deviceId), source(source), policyFlags(policyFlags),
         action(action), actionButton(actionButton),
         flags(flags), metaState(metaState), buttonState(buttonState),
-        edgeFlags(edgeFlags), displayId(displayId), pointerCount(pointerCount),
+        edgeFlags(edgeFlags), displayId(displayId), deviceTimestamp(deviceTimestamp),
+        pointerCount(pointerCount),
         xPrecision(xPrecision), yPrecision(yPrecision), downTime(downTime) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         this->pointerProperties[i].copyFrom(pointerProperties[i]);
@@ -88,7 +90,8 @@
         policyFlags(other.policyFlags),
         action(other.action), actionButton(other.actionButton), flags(other.flags),
         metaState(other.metaState), buttonState(other.buttonState),
-        edgeFlags(other.edgeFlags), displayId(other.displayId), pointerCount(other.pointerCount),
+        edgeFlags(other.edgeFlags), displayId(other.displayId),
+        deviceTimestamp(other.deviceTimestamp), pointerCount(other.pointerCount),
         xPrecision(other.xPrecision), yPrecision(other.yPrecision), downTime(other.downTime) {
     for (uint32_t i = 0; i < pointerCount; i++) {
         pointerProperties[i].copyFrom(other.pointerProperties[i]);
diff --git a/services/inputflinger/InputListener.h b/services/inputflinger/InputListener.h
index ea3dd1c..77afb34 100644
--- a/services/inputflinger/InputListener.h
+++ b/services/inputflinger/InputListener.h
@@ -90,6 +90,13 @@
     int32_t buttonState;
     int32_t edgeFlags;
     int32_t displayId;
+    /**
+     * A timestamp in the input device's time base, not the platform's.
+     * The units are microseconds since the last reset.
+     * This can only be compared to other device timestamps from the same device.
+     * This value will overflow after a little over an hour.
+     */
+    uint32_t deviceTimestamp;
     uint32_t pointerCount;
     PointerProperties pointerProperties[MAX_POINTERS];
     PointerCoords pointerCoords[MAX_POINTERS];
@@ -102,7 +109,7 @@
     NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source, uint32_t policyFlags,
             int32_t action, int32_t actionButton, int32_t flags,
             int32_t metaState, int32_t buttonState,
-            int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
+            int32_t edgeFlags, int32_t displayId, uint32_t deviceTimestamp, uint32_t pointerCount,
             const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
             float xPrecision, float yPrecision, nsecs_t downTime);
 
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 76ea889..e0cd8a0 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -1787,7 +1787,7 @@
 
 MultiTouchMotionAccumulator::MultiTouchMotionAccumulator() :
         mCurrentSlot(-1), mSlots(NULL), mSlotCount(0), mUsingSlotsProtocol(false),
-        mHaveStylus(false) {
+        mHaveStylus(false), mDeviceTimestamp(0) {
 }
 
 MultiTouchMotionAccumulator::~MultiTouchMotionAccumulator() {
@@ -1828,6 +1828,7 @@
     } else {
         clearSlots(-1);
     }
+    mDeviceTimestamp = 0;
 }
 
 void MultiTouchMotionAccumulator::clearSlots(int32_t initialSlot) {
@@ -1921,6 +1922,8 @@
     } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_MT_REPORT) {
         // MultiTouch Sync: The driver has returned all data for *one* of the pointers.
         mCurrentSlot += 1;
+    } else if (rawEvent->type == EV_MSC && rawEvent->code == MSC_TIMESTAMP) {
+        mDeviceTimestamp = rawEvent->value;
     }
 }
 
@@ -2894,7 +2897,7 @@
                 NotifyMotionArgs releaseArgs(when, getDeviceId(), mSource, policyFlags,
                         AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton, 0,
                         metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
-                        displayId, 1, &pointerProperties, &pointerCoords,
+                        displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                         mXPrecision, mYPrecision, downTime);
                 getListener()->notifyMotion(&releaseArgs);
             }
@@ -2903,7 +2906,7 @@
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                 motionEventAction, 0, 0, metaState, currentButtonState,
                 AMOTION_EVENT_EDGE_FLAG_NONE,
-                displayId, 1, &pointerProperties, &pointerCoords,
+                displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                 mXPrecision, mYPrecision, downTime);
         getListener()->notifyMotion(&args);
 
@@ -2915,7 +2918,7 @@
                 NotifyMotionArgs pressArgs(when, getDeviceId(), mSource, policyFlags,
                         AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton, 0,
                         metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
-                        displayId, 1, &pointerProperties, &pointerCoords,
+                        displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                         mXPrecision, mYPrecision, downTime);
                 getListener()->notifyMotion(&pressArgs);
             }
@@ -2929,7 +2932,7 @@
             NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
                     AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                     metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
-                    displayId, 1, &pointerProperties, &pointerCoords,
+                    displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                     mXPrecision, mYPrecision, downTime);
             getListener()->notifyMotion(&hoverArgs);
         }
@@ -2942,7 +2945,7 @@
             NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
                     AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, currentButtonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
-                    displayId, 1, &pointerProperties, &pointerCoords,
+                    displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                     mXPrecision, mYPrecision, downTime);
             getListener()->notifyMotion(&scrollArgs);
         }
@@ -3072,7 +3075,7 @@
         NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
                 AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, 0,
                 AMOTION_EVENT_EDGE_FLAG_NONE,
-                displayId, 1, &pointerProperties, &pointerCoords,
+                displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                 0, 0, 0);
         getListener()->notifyMotion(&scrollArgs);
     }
@@ -4729,6 +4732,7 @@
         int32_t buttonState = mCurrentCookedState.buttonState;
         dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_CANCEL, 0, 0,
                 metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                mCurrentCookedState.deviceTimestamp,
                 mCurrentCookedState.cookedPointerData.pointerProperties,
                 mCurrentCookedState.cookedPointerData.pointerCoords,
                 mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4751,6 +4755,7 @@
             dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
                     AMOTION_EVENT_EDGE_FLAG_NONE,
+                    mCurrentCookedState.deviceTimestamp,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4785,6 +4790,7 @@
 
             dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_POINTER_UP, 0, 0, metaState, buttonState, 0,
+                    mCurrentCookedState.deviceTimestamp,
                     mLastCookedState.cookedPointerData.pointerProperties,
                     mLastCookedState.cookedPointerData.pointerCoords,
                     mLastCookedState.cookedPointerData.idToIndex,
@@ -4799,6 +4805,7 @@
             ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
             dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, 0,
+                    mCurrentCookedState.deviceTimestamp,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4817,6 +4824,7 @@
 
             dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
+                    mCurrentCookedState.deviceTimestamp,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4832,6 +4840,7 @@
         int32_t metaState = getContext()->getGlobalMetaState();
         dispatchMotion(when, policyFlags, mSource,
                 AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastCookedState.buttonState, 0,
+                mLastCookedState.deviceTimestamp,
                 mLastCookedState.cookedPointerData.pointerProperties,
                 mLastCookedState.cookedPointerData.pointerCoords,
                 mLastCookedState.cookedPointerData.idToIndex,
@@ -4848,6 +4857,7 @@
         if (!mSentHoverEnter) {
             dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_HOVER_ENTER,
                     0, 0, metaState, mCurrentRawState.buttonState, 0,
+                    mCurrentCookedState.deviceTimestamp,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4859,6 +4869,7 @@
         dispatchMotion(when, policyFlags, mSource,
                 AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
                 mCurrentRawState.buttonState, 0,
+                mCurrentCookedState.deviceTimestamp,
                 mCurrentCookedState.cookedPointerData.pointerProperties,
                 mCurrentCookedState.cookedPointerData.pointerCoords,
                 mCurrentCookedState.cookedPointerData.idToIndex,
@@ -4878,6 +4889,7 @@
         dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_BUTTON_RELEASE, actionButton,
                     0, metaState, buttonState, 0,
+                    mCurrentCookedState.deviceTimestamp,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
@@ -4895,6 +4907,7 @@
         buttonState |= actionButton;
         dispatchMotion(when, policyFlags, mSource, AMOTION_EVENT_ACTION_BUTTON_PRESS, actionButton,
                     0, metaState, buttonState, 0,
+                    mCurrentCookedState.deviceTimestamp,
                     mCurrentCookedState.cookedPointerData.pointerProperties,
                     mCurrentCookedState.cookedPointerData.pointerCoords,
                     mCurrentCookedState.cookedPointerData.idToIndex, idBits, -1,
@@ -4913,6 +4926,8 @@
     uint32_t currentPointerCount = mCurrentRawState.rawPointerData.pointerCount;
 
     mCurrentCookedState.cookedPointerData.clear();
+    mCurrentCookedState.deviceTimestamp =
+            mCurrentRawState.deviceTimestamp;
     mCurrentCookedState.cookedPointerData.pointerCount = currentPointerCount;
     mCurrentCookedState.cookedPointerData.hoveringIdBits =
             mCurrentRawState.rawPointerData.hoveringIdBits;
@@ -5305,7 +5320,7 @@
         if (cancelPreviousGesture) {
             dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
-                    AMOTION_EVENT_EDGE_FLAG_NONE,
+                    AMOTION_EVENT_EDGE_FLAG_NONE, /* deviceTimestamp */ 0,
                     mPointerGesture.lastGestureProperties,
                     mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
                     dispatchedGestureIdBits, -1, 0,
@@ -5326,6 +5341,7 @@
                 dispatchMotion(when, policyFlags, mSource,
                         AMOTION_EVENT_ACTION_POINTER_UP, 0, 0,
                         metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        /* deviceTimestamp */ 0,
                         mPointerGesture.lastGestureProperties,
                         mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
                         dispatchedGestureIdBits, id,
@@ -5340,7 +5356,7 @@
     if (moveNeeded) {
         dispatchMotion(when, policyFlags, mSource,
                 AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState,
-                AMOTION_EVENT_EDGE_FLAG_NONE,
+                AMOTION_EVENT_EDGE_FLAG_NONE, /* deviceTimestamp */ 0,
                 mPointerGesture.currentGestureProperties,
                 mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                 dispatchedGestureIdBits, -1,
@@ -5361,6 +5377,7 @@
 
             dispatchMotion(when, policyFlags, mSource,
                     AMOTION_EVENT_ACTION_POINTER_DOWN, 0, 0, metaState, buttonState, 0,
+                    /* deviceTimestamp */ 0,
                     mPointerGesture.currentGestureProperties,
                     mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                     dispatchedGestureIdBits, id,
@@ -5372,7 +5389,7 @@
     if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
         dispatchMotion(when, policyFlags, mSource,
                 AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
-                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE, /* deviceTimestamp */ 0,
                 mPointerGesture.currentGestureProperties,
                 mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
                 mPointerGesture.currentGestureIdBits, -1,
@@ -5399,7 +5416,7 @@
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                 AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0,
                 metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
-                mViewport.displayId, 1, &pointerProperties, &pointerCoords,
+                mViewport.displayId, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
                 0, 0, mPointerGesture.downTime);
         getListener()->notifyMotion(&args);
     }
@@ -5429,7 +5446,7 @@
         int32_t buttonState = mCurrentRawState.buttonState;
         dispatchMotion(when, policyFlags, mSource,
                 AMOTION_EVENT_ACTION_CANCEL, 0, 0, metaState, buttonState,
-                AMOTION_EVENT_EDGE_FLAG_NONE,
+                AMOTION_EVENT_EDGE_FLAG_NONE, /* deviceTimestamp */ 0,
                 mPointerGesture.lastGestureProperties,
                 mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
                 mPointerGesture.lastGestureIdBits, -1,
@@ -6321,7 +6338,7 @@
         // Send up.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                  AMOTION_EVENT_ACTION_UP, 0, 0, metaState, mLastRawState.buttonState, 0,
-                 mViewport.displayId,
+                 mViewport.displayId, /* deviceTimestamp */ 0,
                  1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
                  mOrientedXPrecision, mOrientedYPrecision,
                  mPointerSimple.downTime);
@@ -6334,7 +6351,7 @@
         // Send hover exit.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                 AMOTION_EVENT_ACTION_HOVER_EXIT, 0, 0, metaState, mLastRawState.buttonState, 0,
-                mViewport.displayId,
+                mViewport.displayId, /* deviceTimestamp */ 0,
                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
                 mPointerSimple.downTime);
@@ -6349,7 +6366,7 @@
             // Send down.
             NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                     AMOTION_EVENT_ACTION_DOWN, 0, 0, metaState, mCurrentRawState.buttonState, 0,
-                    mViewport.displayId,
+                    mViewport.displayId, /* deviceTimestamp */ 0,
                     1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                     mOrientedXPrecision, mOrientedYPrecision,
                     mPointerSimple.downTime);
@@ -6359,7 +6376,7 @@
         // Send move.
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                 AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, mCurrentRawState.buttonState, 0,
-                mViewport.displayId,
+                mViewport.displayId, /* deviceTimestamp */ 0,
                 1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
                 mPointerSimple.downTime);
@@ -6374,7 +6391,7 @@
             NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                     AMOTION_EVENT_ACTION_HOVER_ENTER, 0, 0, metaState,
                     mCurrentRawState.buttonState, 0,
-                    mViewport.displayId,
+                    mViewport.displayId, /* deviceTimestamp */ 0,
                     1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                     mOrientedXPrecision, mOrientedYPrecision,
                     mPointerSimple.downTime);
@@ -6385,7 +6402,7 @@
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                 AMOTION_EVENT_ACTION_HOVER_MOVE, 0, 0, metaState,
                 mCurrentRawState.buttonState, 0,
-                mViewport.displayId,
+                mViewport.displayId, /* deviceTimestamp */ 0,
                 1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
                 mPointerSimple.downTime);
@@ -6406,7 +6423,7 @@
 
         NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
                 AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, mCurrentRawState.buttonState, 0,
-                mViewport.displayId,
+                mViewport.displayId, /* deviceTimestamp */ 0,
                 1, &mPointerSimple.currentProperties, &pointerCoords,
                 mOrientedXPrecision, mOrientedYPrecision,
                 mPointerSimple.downTime);
@@ -6431,7 +6448,7 @@
 
 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,
+        int32_t metaState, int32_t buttonState, int32_t edgeFlags, uint32_t deviceTimestamp,
         const PointerProperties* properties, const PointerCoords* coords,
         const uint32_t* idToIndex, BitSet32 idBits, int32_t changedId,
         float xPrecision, float yPrecision, nsecs_t downTime) {
@@ -6469,7 +6486,7 @@
 
     NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
             action, actionButton, flags, metaState, buttonState, edgeFlags,
-            mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
+            mViewport.displayId, deviceTimestamp, pointerCount, pointerProperties, pointerCoords,
             xPrecision, yPrecision, downTime);
     getListener()->notifyMotion(&args);
 }
@@ -6949,6 +6966,7 @@
         outCount += 1;
     }
 
+    outState->deviceTimestamp = mMultiTouchMotionAccumulator.getDeviceTimestamp();
     outState->rawPointerData.pointerCount = outCount;
     mPointerIdBits = newPointerIdBits;
 
@@ -7388,7 +7406,8 @@
 
     NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
             AMOTION_EVENT_ACTION_MOVE, 0, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
-            ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
+            ADISPLAY_ID_NONE, /* deviceTimestamp */ 0, 1, &pointerProperties, &pointerCoords,
+            0, 0, 0);
     getListener()->notifyMotion(&args);
 }
 
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index 4f48262..cef3212 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -947,6 +947,7 @@
 
     inline size_t getSlotCount() const { return mSlotCount; }
     inline const Slot* getSlot(size_t index) const { return &mSlots[index]; }
+    inline uint32_t getDeviceTimestamp() const { return mDeviceTimestamp; }
 
 private:
     int32_t mCurrentSlot;
@@ -954,6 +955,7 @@
     size_t mSlotCount;
     bool mUsingSlotsProtocol;
     bool mHaveStylus;
+    uint32_t mDeviceTimestamp;
 
     void clearSlots(int32_t initialSlot);
 };
@@ -1396,6 +1398,7 @@
 
     struct RawState {
         nsecs_t when;
+        uint32_t deviceTimestamp;
 
         // Raw pointer sample data.
         RawPointerData rawPointerData;
@@ -1408,6 +1411,7 @@
 
         void copyFrom(const RawState& other) {
             when = other.when;
+            deviceTimestamp = other.deviceTimestamp;
             rawPointerData.copyFrom(other.rawPointerData);
             buttonState = other.buttonState;
             rawVScroll = other.rawVScroll;
@@ -1416,6 +1420,7 @@
 
         void clear() {
             when = 0;
+            deviceTimestamp = 0;
             rawPointerData.clear();
             buttonState = 0;
             rawVScroll = 0;
@@ -1424,6 +1429,7 @@
     };
 
     struct CookedState {
+        uint32_t deviceTimestamp;
         // Cooked pointer sample data.
         CookedPointerData cookedPointerData;
 
@@ -1435,6 +1441,7 @@
         int32_t buttonState;
 
         void copyFrom(const CookedState& other) {
+            deviceTimestamp = other.deviceTimestamp;
             cookedPointerData.copyFrom(other.cookedPointerData);
             fingerIdBits = other.fingerIdBits;
             stylusIdBits = other.stylusIdBits;
@@ -1443,6 +1450,7 @@
         }
 
         void clear() {
+            deviceTimestamp = 0;
             cookedPointerData.clear();
             fingerIdBits.clear();
             stylusIdBits.clear();
@@ -1837,6 +1845,7 @@
     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,
+            uint32_t deviceTimestamp,
             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/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 63c92d1..0a961cb 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -4384,6 +4384,7 @@
     void processSlot(MultiTouchInputMapper* mapper, int32_t slot);
     void processToolType(MultiTouchInputMapper* mapper, int32_t toolType);
     void processKey(MultiTouchInputMapper* mapper, int32_t code, int32_t value);
+    void processTimestamp(MultiTouchInputMapper* mapper, uint32_t value);
     void processMTSync(MultiTouchInputMapper* mapper);
     void processSync(MultiTouchInputMapper* mapper);
 };
@@ -4499,6 +4500,10 @@
     process(mapper, ARBITRARY_TIME, DEVICE_ID, EV_KEY, code, value);
 }
 
+void MultiTouchInputMapperTest::processTimestamp(MultiTouchInputMapper* mapper, uint32_t value) {
+    process(mapper, ARBITRARY_TIME, DEVICE_ID, EV_MSC, MSC_TIMESTAMP, value);
+}
+
 void MultiTouchInputMapperTest::processMTSync(MultiTouchInputMapper* mapper) {
     process(mapper, ARBITRARY_TIME, DEVICE_ID, EV_SYN, SYN_MT_REPORT, 0);
 }
@@ -5881,5 +5886,30 @@
             toDisplayX(150), toDisplayY(250), 0, 0, 0, 0, 0, 0, 0, 0));
 }
 
+TEST_F(MultiTouchInputMapperTest, Process_HandlesTimestamp) {
+    MultiTouchInputMapper* mapper = new MultiTouchInputMapper(mDevice);
+
+    addConfigurationProperty("touch.deviceType", "touchScreen");
+    prepareDisplay(DISPLAY_ORIENTATION_0);
+    prepareAxes(POSITION);
+    addMapperAndConfigure(mapper);
+    NotifyMotionArgs args;
+
+    // By default, deviceTimestamp should be zero
+    processPosition(mapper, 100, 100);
+    processMTSync(mapper);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+    ASSERT_EQ(0U, args.deviceTimestamp);
+
+    // Now the timestamp of 1000 is reported by evdev and should appear in MotionArgs
+    processPosition(mapper, 0, 0);
+    processTimestamp(mapper, 1000);
+    processMTSync(mapper);
+    processSync(mapper);
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+    ASSERT_EQ(1000U, args.deviceTimestamp);
+}
+
 
 } // namespace android