+ if (vma->priv) {
+ struct mediatek_private_map_data *priv = vma->priv;
+ vma->addr = priv->gem_addr;
+ free(priv->cached_addr);
+ free(priv);
+ vma->priv = NULL;
+ }
+
+ return munmap(vma->addr, vma->length);
+}
+
+static int mediatek_bo_invalidate(struct bo *bo, struct mapping *mapping)
+{
+ if (mapping->vma->priv) {
+ struct mediatek_private_map_data *priv = mapping->vma->priv;
+ memcpy(priv->cached_addr, priv->gem_addr, bo->total_size);
+ }
+
+ return 0;
+}
+
+static int mediatek_bo_flush(struct bo *bo, struct mapping *mapping)
+{
+ struct mediatek_private_map_data *priv = mapping->vma->priv;
+ if (priv && (mapping->vma->map_flags & BO_MAP_WRITE))
+ memcpy(priv->gem_addr, priv->cached_addr, bo->total_size);
+
+ return 0;
+}
+
+static uint32_t mediatek_resolve_format(uint32_t format, uint64_t use_flags)
+{
+ switch (format) {
+ case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
+ /*HACK: See b/28671744 */
+ return DRM_FORMAT_XBGR8888;
+ case DRM_FORMAT_FLEX_YCbCr_420_888:
+ return DRM_FORMAT_YVU420;
+ default:
+ return format;
+ }
+}
+
+const struct backend backend_mediatek = {