OMAPDSS: Add comments about blocking of ovl/mgr functions

Add comments specifying what ovl/mgr functions may block.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 98fc0267dd9e..39862b8c9805 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -384,6 +384,17 @@ struct omap_overlay {
         /* dynamic fields */
         struct omap_overlay_manager *manager;
 
+        /*
+         * The following functions do not block:
+         *
+         * is_enabled
+         * set_overlay_info
+         * get_overlay_info
+         *
+         * The rest of the functions may block and cannot be called from
+         * interrupt context
+         */
+
         int (*enable)(struct omap_overlay *ovl);
         int (*disable)(struct omap_overlay *ovl);
         bool (*is_enabled)(struct omap_overlay *ovl);
@@ -426,6 +437,17 @@ struct omap_overlay_manager {
         /* dynamic fields */
         struct omap_dss_device *device;
 
+        /*
+         * The following functions do not block:
+         *
+         * set_manager_info
+         * get_manager_info
+         * apply
+         *
+         * The rest of the functions may block and cannot be called from
+         * interrupt context
+         */
+
         int (*set_device)(struct omap_overlay_manager *mgr,
                 struct omap_dss_device *dssdev);
         int (*unset_device)(struct omap_overlay_manager *mgr);