diff --git a/libgralloc/gpu.cpp b/libgralloc/gpu.cpp
index 4b62c9c..8b512bf 100644
--- a/libgralloc/gpu.cpp
+++ b/libgralloc/gpu.cpp
@@ -290,11 +290,20 @@
             grallocFormat = HAL_PIXEL_FORMAT_NV21_ZSL; //NV21 ZSL
         else if(usage & GRALLOC_USAGE_HW_CAMERA_READ)
             grallocFormat = HAL_PIXEL_FORMAT_YCrCb_420_SP; //NV21
-        else if(usage & GRALLOC_USAGE_HW_CAMERA_WRITE)
-            grallocFormat = HAL_PIXEL_FORMAT_YCrCb_420_SP; //NV21
-        else if(usage & GRALLOC_USAGE_HW_COMPOSER)
+        else if(usage & GRALLOC_USAGE_HW_CAMERA_WRITE) {
+           if (format == HAL_PIXEL_FORMAT_YCbCr_420_888) {
+               grallocFormat = HAL_PIXEL_FORMAT_NV21_ZSL; //NV21
+           } else {
+               grallocFormat = HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS; //NV12 preview
+           }
+        } else if(usage & GRALLOC_USAGE_HW_COMPOSER)
             //XXX: If we still haven't set a format, default to RGBA8888
             grallocFormat = HAL_PIXEL_FORMAT_RGBA_8888;
+        else if(format == HAL_PIXEL_FORMAT_YCbCr_420_888) {
+            //If no other usage flags are detected, default the
+            //flexible YUV format to NV21_ZSL
+            grallocFormat = HAL_PIXEL_FORMAT_NV21_ZSL;
+        }
     }
 
     bool useFbMem = false;