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-rw-r--r--include/linux/host1x.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index e8dc5bc41f79..c0bf4e581fe9 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -31,6 +31,11 @@ u64 host1x_get_dma_mask(struct host1x *host1x);
* struct host1x_bo_cache - host1x buffer object cache
* @mappings: list of mappings
* @lock: synchronizes accesses to the list of mappings
+ *
+ * Note that entries are not periodically evicted from this cache and instead need to be
+ * explicitly released. This is used primarily for DRM/KMS where the cache's reference is
+ * released when the last reference to a buffer object represented by a mapping in this
+ * cache is dropped.
*/
struct host1x_bo_cache {
struct list_head mappings;
@@ -81,6 +86,7 @@ struct host1x_client_ops {
* @parent: pointer to parent structure
* @usecount: reference count for this structure
* @lock: mutex for mutually exclusive concurrency
+ * @cache: host1x buffer object cache
*/
struct host1x_client {
struct list_head list;