diff --git a/gralloc_priv.h b/gralloc_priv.h
index c573941..fdf5d5e 100644
--- a/gralloc_priv.h
+++ b/gralloc_priv.h
@@ -51,6 +51,10 @@ enum {
     HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO    = 0x10A,
     HAL_PIXEL_FORMAT_YCrCb_422_SP           = 0x10B,
     HAL_PIXEL_FORMAT_YCrCb_420_SP_INTERLACE = 0x10C,
+    HAL_PIXEL_FORMAT_R_8                    = 0x10D,
+    HAL_PIXEL_FORMAT_RG_88                  = 0x10E,
+    HAL_PIXEL_FORMAT_INTERLACE              = 0x180,
+
 };
 
 /*****************************************************************************/
@@ -96,6 +100,7 @@ struct private_handle_t {
         PRIV_FLAGS_USES_PMEM      = 0x00000002,
         PRIV_FLAGS_USES_PMEM_ADSP = 0x00000004,
         PRIV_FLAGS_NEEDS_FLUSH    = 0x00000008,
+        PRIV_FLAGS_USES_ASHMEM    = 0x00000010,
     };
 
     enum {
diff --git a/mapper.cpp b/mapper.cpp
index 26fadbc..61243eb 100644
--- a/mapper.cpp
+++ b/mapper.cpp
@@ -279,12 +279,15 @@ int gralloc_unlock(gralloc_module_t const* module,
     int32_t current_value, new_value;
 
     if (hnd->flags & private_handle_t::PRIV_FLAGS_NEEDS_FLUSH) {
-        struct pmem_region region;
         int err;
+        if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM) {
+            struct pmem_addr pmem_addr;
+            pmem_addr.vaddr = hnd->base;
+            pmem_addr.offset = hnd->offset;
+            pmem_addr.length = hnd->size;
+            err = ioctl( hnd->fd, PMEM_CLEAN_CACHES,  &pmem_addr);
+        }       
 
-        region.offset = hnd->offset;
-        region.len = hnd->size;
-        err = ioctl(hnd->fd, PMEM_CACHE_FLUSH, &region);
         LOGE_IF(err < 0, "cannot flush handle %p (offs=%x len=%x)\n",
                 hnd, hnd->offset, hnd->size);
         hnd->flags &= ~private_handle_t::PRIV_FLAGS_NEEDS_FLUSH;