diff --git a/include/input/InputTransport.h b/include/input/InputTransport.h
index f31bcea..efa1ffb 100644
--- a/include/input/InputTransport.h
+++ b/include/input/InputTransport.h
@@ -65,6 +65,7 @@
             nsecs_t eventTime __attribute__((aligned(8)));
             int32_t deviceId;
             int32_t source;
+            int32_t displayId;
             int32_t action;
             int32_t flags;
             int32_t keyCode;
@@ -83,6 +84,7 @@
             nsecs_t eventTime __attribute__((aligned(8)));
             int32_t deviceId;
             int32_t source;
+            int32_t displayId;
             int32_t action;
             int32_t actionButton;
             int32_t flags;
@@ -232,6 +234,7 @@
             uint32_t seq,
             int32_t deviceId,
             int32_t source,
+            int32_t displayId,
             int32_t action,
             int32_t actionButton,
             int32_t flags,
@@ -303,7 +306,7 @@
      * Other errors probably indicate that the channel is broken.
      */
     status_t consume(InputEventFactoryInterface* factory, bool consumeBatches,
-            nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent);
+            nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent, int32_t* displayId);
 
     /* Sends a finished signal to the publisher to inform it that the message
      * with the specified sequence number has finished being process and whether
@@ -424,9 +427,10 @@
     Vector<SeqChain> mSeqChains;
 
     status_t consumeBatch(InputEventFactoryInterface* factory,
-            nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent);
+            nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent, int32_t* displayId);
     status_t consumeSamples(InputEventFactoryInterface* factory,
-            Batch& batch, size_t count, uint32_t* outSeq, InputEvent** outEvent);
+            Batch& batch, size_t count, uint32_t* outSeq, InputEvent** outEvent,
+            int32_t* displayId);
 
     void updateTouchState(InputMessage* msg);
     void rewriteMessage(const TouchState& state, InputMessage* msg);
diff --git a/libs/input/InputTransport.cpp b/libs/input/InputTransport.cpp
index 293bc25..d5c5927 100644
--- a/libs/input/InputTransport.cpp
+++ b/libs/input/InputTransport.cpp
@@ -285,6 +285,7 @@
         uint32_t seq,
         int32_t deviceId,
         int32_t source,
+        int32_t displayId,
         int32_t action,
         int32_t actionButton,
         int32_t flags,
@@ -327,6 +328,7 @@
     msg.body.motion.seq = seq;
     msg.body.motion.deviceId = deviceId;
     msg.body.motion.source = source;
+    msg.body.motion.displayId = displayId;
     msg.body.motion.action = action;
     msg.body.motion.actionButton = actionButton;
     msg.body.motion.flags = flags;
@@ -396,7 +398,8 @@
 }
 
 status_t InputConsumer::consume(InputEventFactoryInterface* factory,
-        bool consumeBatches, nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent) {
+        bool consumeBatches, nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent,
+        int32_t* displayId) {
 #if DEBUG_TRANSPORT_ACTIONS
     ALOGD("channel '%s' consumer ~ consume: consumeBatches=%s, frameTime=%lld",
             mChannel->getName().string(), consumeBatches ? "true" : "false", frameTime);
@@ -404,6 +407,7 @@
 
     *outSeq = 0;
     *outEvent = NULL;
+    *displayId = -1;  // Invalid display.
 
     // Fetch the next input message.
     // Loop until an event can be returned or no additional events are received.
@@ -418,7 +422,7 @@
             if (result) {
                 // Consume the next batched event unless batches are being held for later.
                 if (consumeBatches || result != WOULD_BLOCK) {
-                    result = consumeBatch(factory, frameTime, outSeq, outEvent);
+                    result = consumeBatch(factory, frameTime, outSeq, outEvent, displayId);
                     if (*outEvent) {
 #if DEBUG_TRANSPORT_ACTIONS
                         ALOGD("channel '%s' consumer ~ consumed batch event, seq=%u",
@@ -462,7 +466,7 @@
                     // the previous batch right now and defer the new message until later.
                     mMsgDeferred = true;
                     status_t result = consumeSamples(factory,
-                            batch, batch.samples.size(), outSeq, outEvent);
+                            batch, batch.samples.size(), outSeq, outEvent, displayId);
                     mBatches.removeAt(batchIndex);
                     if (result) {
                         return result;
@@ -496,6 +500,7 @@
             initializeMotionEvent(motionEvent, &mMsg);
             *outSeq = mMsg.body.motion.seq;
             *outEvent = motionEvent;
+            *displayId = mMsg.body.motion.displayId;
 #if DEBUG_TRANSPORT_ACTIONS
             ALOGD("channel '%s' consumer ~ consumed motion event, seq=%u",
                     mChannel->getName().string(), *outSeq);
@@ -513,14 +518,14 @@
 }
 
 status_t InputConsumer::consumeBatch(InputEventFactoryInterface* factory,
-        nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent) {
+        nsecs_t frameTime, uint32_t* outSeq, InputEvent** outEvent, int32_t* displayId) {
     status_t result;
     for (size_t i = mBatches.size(); i > 0; ) {
         i--;
         Batch& batch = mBatches.editItemAt(i);
         if (frameTime < 0) {
             result = consumeSamples(factory, batch, batch.samples.size(),
-                    outSeq, outEvent);
+                    outSeq, outEvent, displayId);
             mBatches.removeAt(i);
             return result;
         }
@@ -534,7 +539,7 @@
             continue;
         }
 
-        result = consumeSamples(factory, batch, split + 1, outSeq, outEvent);
+        result = consumeSamples(factory, batch, split + 1, outSeq, outEvent, displayId);
         const InputMessage* next;
         if (batch.samples.isEmpty()) {
             mBatches.removeAt(i);
@@ -552,7 +557,7 @@
 }
 
 status_t InputConsumer::consumeSamples(InputEventFactoryInterface* factory,
-        Batch& batch, size_t count, uint32_t* outSeq, InputEvent** outEvent) {
+        Batch& batch, size_t count, uint32_t* outSeq, InputEvent** outEvent, int32_t* displayId) {
     MotionEvent* motionEvent = factory->createMotionEvent();
     if (! motionEvent) return NO_MEMORY;
 
@@ -567,6 +572,7 @@
             mSeqChains.push(seqChain);
             addSample(motionEvent, &msg);
         } else {
+            *displayId = msg.body.motion.displayId;
             initializeMotionEvent(motionEvent, &msg);
         }
         chain = msg.body.motion.seq;
diff --git a/libs/input/tests/InputPublisherAndConsumer_test.cpp b/libs/input/tests/InputPublisherAndConsumer_test.cpp
index 8e69c9c..a136738 100644
--- a/libs/input/tests/InputPublisherAndConsumer_test.cpp
+++ b/libs/input/tests/InputPublisherAndConsumer_test.cpp
@@ -89,7 +89,8 @@
 
     uint32_t consumeSeq;
     InputEvent* event;
-    status = mConsumer->consume(&mEventFactory, true /*consumeBatches*/, -1, &consumeSeq, &event);
+    status = mConsumer->consume(&mEventFactory, true /*consumeBatches*/, -1, &consumeSeq, &event,
+            0);
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
@@ -132,6 +133,7 @@
     const uint32_t seq = 15;
     const int32_t deviceId = 1;
     const int32_t source = AINPUT_SOURCE_TOUCHSCREEN;
+    const int32_t displayId = 0;
     const int32_t action = AMOTION_EVENT_ACTION_MOVE;
     const int32_t actionButton = 0;
     const int32_t flags = AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED;
@@ -164,7 +166,7 @@
         pointerCoords[i].setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, 3.5 * i);
     }
 
-    status = mPublisher->publishMotionEvent(seq, deviceId, source, action, actionButton,
+    status = mPublisher->publishMotionEvent(seq, deviceId, source, displayId, action, actionButton,
             flags, edgeFlags, metaState, buttonState, xOffset, yOffset, xPrecision, yPrecision,
             downTime, eventTime, pointerCount,
             pointerProperties, pointerCoords);
@@ -173,7 +175,8 @@
 
     uint32_t consumeSeq;
     InputEvent* event;
-    status = mConsumer->consume(&mEventFactory, true /*consumeBatches*/, -1, &consumeSeq, &event);
+    status = mConsumer->consume(&mEventFactory, true /*consumeBatches*/, -1, &consumeSeq, &event,
+            0);
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
@@ -256,7 +259,7 @@
     PointerProperties pointerProperties[pointerCount];
     PointerCoords pointerCoords[pointerCount];
 
-    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status)
             << "publisher publishMotionEvent should return BAD_VALUE";
@@ -272,7 +275,7 @@
         pointerCoords[i].clear();
     }
 
-    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    status = mPublisher->publishMotionEvent(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             pointerCount, pointerProperties, pointerCoords);
     ASSERT_EQ(BAD_VALUE, status)
             << "publisher publishMotionEvent should return BAD_VALUE";
diff --git a/libs/input/tests/StructLayout_test.cpp b/libs/input/tests/StructLayout_test.cpp
index 81b9953..d19f3b8 100644
--- a/libs/input/tests/StructLayout_test.cpp
+++ b/libs/input/tests/StructLayout_test.cpp
@@ -38,31 +38,33 @@
   CHECK_OFFSET(InputMessage::Body::Key, eventTime, 8);
   CHECK_OFFSET(InputMessage::Body::Key, deviceId, 16);
   CHECK_OFFSET(InputMessage::Body::Key, source, 20);
-  CHECK_OFFSET(InputMessage::Body::Key, action, 24);
-  CHECK_OFFSET(InputMessage::Body::Key, flags, 28);
-  CHECK_OFFSET(InputMessage::Body::Key, keyCode, 32);
-  CHECK_OFFSET(InputMessage::Body::Key, scanCode, 36);
-  CHECK_OFFSET(InputMessage::Body::Key, metaState, 40);
-  CHECK_OFFSET(InputMessage::Body::Key, repeatCount, 44);
-  CHECK_OFFSET(InputMessage::Body::Key, downTime, 48);
+  CHECK_OFFSET(InputMessage::Body::Key, displayId, 24);
+  CHECK_OFFSET(InputMessage::Body::Key, action, 28);
+  CHECK_OFFSET(InputMessage::Body::Key, flags, 32);
+  CHECK_OFFSET(InputMessage::Body::Key, keyCode, 36);
+  CHECK_OFFSET(InputMessage::Body::Key, scanCode, 40);
+  CHECK_OFFSET(InputMessage::Body::Key, metaState, 44);
+  CHECK_OFFSET(InputMessage::Body::Key, repeatCount, 48);
+  CHECK_OFFSET(InputMessage::Body::Key, downTime, 56);
 
   CHECK_OFFSET(InputMessage::Body::Motion, seq, 0);
   CHECK_OFFSET(InputMessage::Body::Motion, eventTime, 8);
   CHECK_OFFSET(InputMessage::Body::Motion, deviceId, 16);
   CHECK_OFFSET(InputMessage::Body::Motion, source, 20);
-  CHECK_OFFSET(InputMessage::Body::Motion, action, 24);
-  CHECK_OFFSET(InputMessage::Body::Motion, actionButton, 28);
-  CHECK_OFFSET(InputMessage::Body::Motion, flags, 32);
-  CHECK_OFFSET(InputMessage::Body::Motion, metaState, 36);
-  CHECK_OFFSET(InputMessage::Body::Motion, buttonState, 40);
-  CHECK_OFFSET(InputMessage::Body::Motion, edgeFlags, 44);
-  CHECK_OFFSET(InputMessage::Body::Motion, downTime, 48);
-  CHECK_OFFSET(InputMessage::Body::Motion, xOffset, 56);
-  CHECK_OFFSET(InputMessage::Body::Motion, yOffset, 60);
-  CHECK_OFFSET(InputMessage::Body::Motion, xPrecision, 64);
-  CHECK_OFFSET(InputMessage::Body::Motion, yPrecision, 68);
-  CHECK_OFFSET(InputMessage::Body::Motion, pointerCount, 72);
-  CHECK_OFFSET(InputMessage::Body::Motion, pointers, 80);
+  CHECK_OFFSET(InputMessage::Body::Motion, displayId, 24);
+  CHECK_OFFSET(InputMessage::Body::Motion, action, 28);
+  CHECK_OFFSET(InputMessage::Body::Motion, actionButton, 32);
+  CHECK_OFFSET(InputMessage::Body::Motion, flags, 36);
+  CHECK_OFFSET(InputMessage::Body::Motion, metaState, 40);
+  CHECK_OFFSET(InputMessage::Body::Motion, buttonState, 44);
+  CHECK_OFFSET(InputMessage::Body::Motion, edgeFlags, 48);
+  CHECK_OFFSET(InputMessage::Body::Motion, downTime, 56);
+  CHECK_OFFSET(InputMessage::Body::Motion, xOffset, 64);
+  CHECK_OFFSET(InputMessage::Body::Motion, yOffset, 68);
+  CHECK_OFFSET(InputMessage::Body::Motion, xPrecision, 72);
+  CHECK_OFFSET(InputMessage::Body::Motion, yPrecision, 76);
+  CHECK_OFFSET(InputMessage::Body::Motion, pointerCount, 80);
+  CHECK_OFFSET(InputMessage::Body::Motion, pointers, 88);
 }
 
 } // namespace android
diff --git a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp
index 7bc702d..69067d2 100644
--- a/services/inputflinger/InputDispatcher.cpp
+++ b/services/inputflinger/InputDispatcher.cpp
@@ -2023,7 +2023,7 @@
 
             // Publish the motion event.
             status = connection->inputPublisher.publishMotionEvent(dispatchEntry->seq,
-                    motionEntry->deviceId, motionEntry->source,
+                    motionEntry->deviceId, motionEntry->source, motionEntry->displayId,
                     dispatchEntry->resolvedAction, motionEntry->actionButton,
                     dispatchEntry->resolvedFlags, motionEntry->edgeFlags,
                     motionEntry->metaState, motionEntry->buttonState,
@@ -2597,8 +2597,9 @@
         uint32_t policyFlags) {
 #if DEBUG_INBOUND_EVENT_DETAILS
     ALOGD("injectInputEvent - eventType=%d, injectorPid=%d, injectorUid=%d, "
-            "syncMode=%d, timeoutMillis=%d, policyFlags=0x%08x",
-            event->getType(), injectorPid, injectorUid, syncMode, timeoutMillis, policyFlags);
+            "syncMode=%d, timeoutMillis=%d, policyFlags=0x%08x, displayId=%d",
+            event->getType(), injectorPid, injectorUid, syncMode, timeoutMillis, policyFlags,
+            displayId);
 #endif
 
     nsecs_t endTime = now() + milliseconds_to_nanoseconds(timeoutMillis);