diff --git a/graphics/mapper/3.0/utils/vts/MapperVts.cpp b/graphics/mapper/3.0/utils/vts/MapperVts.cpp
index 8428403..4b24a1f 100644
--- a/graphics/mapper/3.0/utils/vts/MapperVts.cpp
+++ b/graphics/mapper/3.0/utils/vts/MapperVts.cpp
@@ -164,7 +164,8 @@
 }
 
 void* Gralloc::lock(const native_handle_t* bufferHandle, uint64_t cpuUsage,
-                    const IMapper::Rect& accessRegion, int acquireFence) {
+                    const IMapper::Rect& accessRegion, int acquireFence, int32_t* outBytesPerPixel,
+                    int32_t* outBytesPerStride) {
     auto buffer = const_cast<native_handle_t*>(bufferHandle);
 
     NATIVE_HANDLE_DECLARE_STORAGE(acquireFenceStorage, 1, 0);
@@ -177,9 +178,12 @@
 
     void* data = nullptr;
     mMapper->lock(buffer, cpuUsage, accessRegion, acquireFenceHandle,
-                  [&](const auto& tmpError, const auto& tmpData) {
+                  [&](const auto& tmpError, const auto& tmpData, int32_t tmpBytesPerPixel,
+                      int32_t tmpBytesPerStride) {
                       ASSERT_EQ(Error::NONE, tmpError) << "failed to lock buffer " << buffer;
                       data = tmpData;
+                      *outBytesPerPixel = tmpBytesPerPixel;
+                      *outBytesPerStride = tmpBytesPerStride;
                   });
 
     if (acquireFence >= 0) {
diff --git a/graphics/mapper/3.0/utils/vts/include/mapper-vts/3.0/MapperVts.h b/graphics/mapper/3.0/utils/vts/include/mapper-vts/3.0/MapperVts.h
index c94961c..efae82f 100644
--- a/graphics/mapper/3.0/utils/vts/include/mapper-vts/3.0/MapperVts.h
+++ b/graphics/mapper/3.0/utils/vts/include/mapper-vts/3.0/MapperVts.h
@@ -68,7 +68,8 @@
     // in and out of the mapper.  The ownership of the fd is always transferred
     // with each of these functions.
     void* lock(const native_handle_t* bufferHandle, uint64_t cpuUsage,
-               const IMapper::Rect& accessRegion, int acquireFence);
+               const IMapper::Rect& accessRegion, int acquireFence, int32_t* outBytesPerPixel,
+               int32_t* outBytesPerStride);
     YCbCrLayout lockYCbCr(const native_handle_t* bufferHandle, uint64_t cpuUsage,
                           const IMapper::Rect& accessRegion, int acquireFence);
     int unlock(const native_handle_t* bufferHandle);