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>

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 98fc026..39862b8 100644 (file)
--- 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);