diff --git a/camera/device/aidl/android/hardware/camera/device/ShutterMsg.aidl b/camera/device/aidl/android/hardware/camera/device/ShutterMsg.aidl
index 24ae1a0..f5489d4 100644
--- a/camera/device/aidl/android/hardware/camera/device/ShutterMsg.aidl
+++ b/camera/device/aidl/android/hardware/camera/device/ShutterMsg.aidl
@@ -40,6 +40,9 @@
      * as timestamp, and for a rolling shutter sensor, the value must be
      * timestamp + exposureTime + t_crop_top where t_crop_top is the exposure time
      * skew of the cropped lines on the top.
+     *
+     * If ANDROID_SENSOR_READOUT_TIMESTAMP is set to NOT_SUPPORTED, this field
+     * will be ignored by the camera framework.
      */
     long readoutTimestamp;
 }
diff --git a/camera/provider/aidl/vts/camera_aidl_test.cpp b/camera/provider/aidl/vts/camera_aidl_test.cpp
index 1ad5af9..f905011 100644
--- a/camera/provider/aidl/vts/camera_aidl_test.cpp
+++ b/camera/provider/aidl/vts/camera_aidl_test.cpp
@@ -456,6 +456,22 @@
     return ret;
 }
 
+bool CameraAidlTest::isReadoutTimestampSupported(const camera_metadata_t* staticMeta) {
+    camera_metadata_ro_entry readoutTimestampEntry;
+    int rc = find_camera_metadata_ro_entry(staticMeta, ANDROID_SENSOR_READOUT_TIMESTAMP,
+                                           &readoutTimestampEntry);
+    if (rc != 0) {
+        ALOGI("%s: Failed to find ANDROID_SENSOR_READOUT_TIMESTAMP", __FUNCTION__);
+        return true;
+    }
+    if (readoutTimestampEntry.count == 1 && !readoutTimestampEntry.data.u8[0]) {
+        ALOGI("%s: readout timestamp not supported", __FUNCTION__);
+        return false;
+    }
+    ALOGI("%s: readout timestamp supported", __FUNCTION__);
+    return true;
+}
+
 void CameraAidlTest::verifyLogicalCameraResult(const camera_metadata_t* staticMetadata,
                                                const std::vector<uint8_t>& resultMetadata) {
     camera_metadata_t* metadata = (camera_metadata_t*)resultMetadata.data();
@@ -2383,13 +2399,13 @@
             ASSERT_NE(inflightReq->resultOutputBuffers.size(), 0u);
             ASSERT_EQ(testStream.id, inflightReq->resultOutputBuffers[0].buffer.streamId);
 
-            // shutterReadoutTimestamp must be available, and it must
+            // shutterReadoutTimestamp, if supported, must
             // be >= shutterTimestamp + exposureTime,
             // and < shutterTimestamp + exposureTime + rollingShutterSkew / 2.
-            ASSERT_TRUE(inflightReq->shutterReadoutTimestampValid);
             ASSERT_FALSE(inflightReq->collectedResult.isEmpty());
 
-            if (inflightReq->collectedResult.exists(ANDROID_SENSOR_EXPOSURE_TIME)) {
+            if (mSupportReadoutTimestamp &&
+                inflightReq->collectedResult.exists(ANDROID_SENSOR_EXPOSURE_TIME)) {
                 camera_metadata_entry_t exposureTimeResult =
                         inflightReq->collectedResult.find(ANDROID_SENSOR_EXPOSURE_TIME);
                 nsecs_t exposureToReadout =
@@ -2904,13 +2920,14 @@
             ASSERT_FALSE(inflightReq->errorCodeValid);
             ASSERT_NE(inflightReq->resultOutputBuffers.size(), 0u);
             ASSERT_EQ(testStream.id, inflightReq->resultOutputBuffers[0].buffer.streamId);
-            ASSERT_TRUE(inflightReq->shutterReadoutTimestampValid);
-            nsecs_t readoutTimestamp = inflightReq->shutterReadoutTimestamp;
+            nsecs_t captureTimestamp = mSupportReadoutTimestamp
+                                               ? inflightReq->shutterReadoutTimestamp
+                                               : inflightReq->shutterTimestamp;
 
             if (previewStabilizationOn) {
                 // Here we collect the time difference between the buffer ready
-                // timestamp - notify readout timestamp.
-                // timeLag = buffer ready timestamp - notify readout timestamp.
+                // timestamp - notify timestamp.
+                // timeLag = buffer ready timestamp - notify timestamp.
                 // timeLag(previewStabilization) must be <=
                 //        timeLag(stabilization off) + 1 frame duration.
                 auto it = cameraDeviceToTimeLag.find(name);
@@ -2921,12 +2938,12 @@
                 ASSERT_TRUE(it != cameraDeviceToTimeLag.end());
 
                 nsecs_t previewStabOnLagTime =
-                        inflightReq->resultOutputBuffers[0].timeStamp - readoutTimestamp;
+                        inflightReq->resultOutputBuffers[0].timeStamp - captureTimestamp;
                 ASSERT_TRUE(previewStabOnLagTime <= (it->second + frameDuration));
             } else {
                 // Fill in the buffer ready timestamp - notify timestamp;
                 cameraDeviceToTimeLag[std::string(name)] =
-                        inflightReq->resultOutputBuffers[0].timeStamp - readoutTimestamp;
+                        inflightReq->resultOutputBuffers[0].timeStamp - captureTimestamp;
             }
         }
 
diff --git a/camera/provider/aidl/vts/camera_aidl_test.h b/camera/provider/aidl/vts/camera_aidl_test.h
index 782794b..9edbf41 100644
--- a/camera/provider/aidl/vts/camera_aidl_test.h
+++ b/camera/provider/aidl/vts/camera_aidl_test.h
@@ -346,6 +346,8 @@
 
     static Status isOfflineSessionSupported(const camera_metadata_t* staticMeta);
 
+    static bool isReadoutTimestampSupported(const camera_metadata_t* staticMeta);
+
     static Status getPhysicalCameraIds(const camera_metadata_t* staticMeta,
                                        std::unordered_set<std::string>* physicalIds /*out*/);
 
@@ -456,8 +458,6 @@
     struct InFlightRequest {
         // Set by notify() SHUTTER call.
         nsecs_t shutterTimestamp;
-
-        bool shutterReadoutTimestampValid;
         nsecs_t shutterReadoutTimestamp;
 
         bool errorCodeValid;
@@ -523,7 +523,6 @@
 
         InFlightRequest()
             : shutterTimestamp(0),
-              shutterReadoutTimestampValid(false),
               shutterReadoutTimestamp(0),
               errorCodeValid(false),
               errorCode(ErrorCode::ERROR_BUFFER),
@@ -541,7 +540,6 @@
         InFlightRequest(ssize_t numBuffers, bool hasInput, bool partialResults,
                         int32_t partialCount, std::shared_ptr<ResultMetadataQueue> queue = nullptr)
             : shutterTimestamp(0),
-              shutterReadoutTimestampValid(false),
               shutterReadoutTimestamp(0),
               errorCodeValid(false),
               errorCode(ErrorCode::ERROR_BUFFER),
@@ -561,7 +559,6 @@
                         const std::unordered_set<std::string>& extraPhysicalResult,
                         std::shared_ptr<ResultMetadataQueue> queue = nullptr)
             : shutterTimestamp(0),
-              shutterReadoutTimestampValid(false),
               shutterReadoutTimestamp(0),
               errorCodeValid(false),
               errorCode(ErrorCode::ERROR_BUFFER),
@@ -631,6 +628,8 @@
 
     HandleImporter mHandleImporter;
 
+    bool mSupportReadoutTimestamp;
+
     friend class DeviceCb;
     friend class SimpleDeviceCb;
     friend class TorchProviderCb;
diff --git a/camera/provider/aidl/vts/device_cb.cpp b/camera/provider/aidl/vts/device_cb.cpp
index 8a8b925..bfd1cd1 100644
--- a/camera/provider/aidl/vts/device_cb.cpp
+++ b/camera/provider/aidl/vts/device_cb.cpp
@@ -32,10 +32,11 @@
 
 DeviceCb::DeviceCb(CameraAidlTest* parent, camera_metadata_t* staticMeta) : mParent(parent) {
     mStaticMetadata = staticMeta;
+    parent->mSupportReadoutTimestamp = CameraAidlTest::isReadoutTimestampSupported(staticMeta);
 }
 
 ScopedAStatus DeviceCb::notify(const std::vector<NotifyMsg>& msgs) {
-    std::vector<std::pair<bool, nsecs_t>> readoutTimestamps;
+    std::vector<nsecs_t> readoutTimestamps;
 
     size_t count = msgs.size();
     readoutTimestamps.resize(count);
@@ -44,11 +45,11 @@
         const NotifyMsg& msg = msgs[i];
         switch (msg.getTag()) {
             case NotifyMsg::Tag::error:
-                readoutTimestamps[i] = {false, 0};
+                readoutTimestamps[i] = 0;
                 break;
             case NotifyMsg::Tag::shutter:
                 const auto& shutter = msg.get<NotifyMsg::Tag::shutter>();
-                readoutTimestamps[i] = {true, shutter.readoutTimestamp};
+                readoutTimestamps[i] = shutter.readoutTimestamp;
                 break;
         }
     }
@@ -446,9 +447,8 @@
     return notify;
 }
 
-ScopedAStatus DeviceCb::notifyHelper(
-        const std::vector<NotifyMsg>& msgs,
-        const std::vector<std::pair<bool, nsecs_t>>& readoutTimestamps) {
+ScopedAStatus DeviceCb::notifyHelper(const std::vector<NotifyMsg>& msgs,
+                                     const std::vector<nsecs_t>& readoutTimestamps) {
     std::lock_guard<std::mutex> l(mParent->mLock);
 
     for (size_t i = 0; i < msgs.size(); i++) {
@@ -514,8 +514,7 @@
                 }
                 auto& r = itr->second;
                 r->shutterTimestamp = msg.get<NotifyMsg::Tag::shutter>().timestamp;
-                r->shutterReadoutTimestampValid = readoutTimestamps[i].first;
-                r->shutterReadoutTimestamp = readoutTimestamps[i].second;
+                r->shutterReadoutTimestamp = readoutTimestamps[i];
                 break;
         }
     }
diff --git a/camera/provider/aidl/vts/device_cb.h b/camera/provider/aidl/vts/device_cb.h
index 3ae7d10..d839ab4 100644
--- a/camera/provider/aidl/vts/device_cb.h
+++ b/camera/provider/aidl/vts/device_cb.h
@@ -60,7 +60,7 @@
     bool processCaptureResultLocked(const CaptureResult& results,
                                     std::vector<PhysicalCameraMetadata> physicalCameraMetadata);
     ScopedAStatus notifyHelper(const std::vector<NotifyMsg>& msgs,
-                               const std::vector<std::pair<bool, nsecs_t>>& readoutTimestamps);
+                               const std::vector<nsecs_t>& readoutTimestamps);
 
     CameraAidlTest* mParent;  // Parent object