diff --git a/gnss/2.1/default/GnssDebug.cpp b/gnss/2.1/default/GnssDebug.cpp
new file mode 100644
index 0000000..a9f7ded
--- /dev/null
+++ b/gnss/2.1/default/GnssDebug.cpp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "GnssDebug"
+
+#include <log/log.h>
+
+#include "Constants.h"
+#include "GnssDebug.h"
+
+using namespace ::android::hardware::gnss::common;
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_1 {
+namespace implementation {
+
+// Methods from ::android::hardware::gnss::V1_0::IGnssDebug follow.
+Return<void> GnssDebug::getDebugData(V1_0::IGnssDebug::getDebugData_cb _hidl_cb) {
+    PositionDebug positionDebug = {
+            .valid = true,
+            .latitudeDegrees = kMockLatitudeDegrees,
+            .longitudeDegrees = kMockLongitudeDegrees,
+            .altitudeMeters = kMockAltitudeMeters,
+            .speedMetersPerSec = kMockSpeedMetersPerSec,
+            .bearingDegrees = kMockBearingDegrees,
+            .horizontalAccuracyMeters = kMockHorizontalAccuracyMeters,
+            .verticalAccuracyMeters = kMockVerticalAccuracyMeters,
+            .speedAccuracyMetersPerSecond = kMockSpeedAccuracyMetersPerSecond,
+            .bearingAccuracyDegrees = kMockBearingAccuracyDegrees,
+            .ageSeconds = 0.99};
+
+    TimeDebug timeDebug = {.timeEstimate = kMockTimestamp,
+                           .timeUncertaintyNs = 1000,
+                           .frequencyUncertaintyNsPerSec = 5.0e4};
+
+    DebugData data = {.position = positionDebug, .time = timeDebug};
+
+    _hidl_cb(data);
+
+    return Void();
+}
+
+}  // namespace implementation
+}  // namespace V1_1
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android