OMAPFB: search for default display with DT alias

Improve the search for the default display in two ways:
* compare the given display name to the display's alias
* if no display name is given, look for "display0" DT alias

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Archit Taneja <archit@ti.com>

diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index b746963..f121e87 100644 (file)
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2423,7 +2423,10 @@ omapfb_find_default_display(struct omapfb2_device *fbdev)
        const char *def_name;
        int i;
 
-       /* search with the display name from the user or the board file */
+       /*
+        * Search with the display name from the user or the board file,
+        * comparing to display names and aliases
+        */
 
        def_name = omapdss_get_default_display_name();
 
@@ -2435,12 +2438,30 @@ omapfb_find_default_display(struct omapfb2_device *fbdev)
 
                        if (dssdev->name && strcmp(def_name, dssdev->name) == 0)
                                return dssdev;
+
+                       if (strcmp(def_name, dssdev->alias) == 0)
+                               return dssdev;
                }
 
                /* def_name given but not found */
                return NULL;
        }
 
+       /* then look for DT alias display0 */
+       for (i = 0; i < fbdev->num_displays; ++i) {
+               struct omap_dss_device *dssdev;
+               int id;
+
+               dssdev = fbdev->displays[i].dssdev;
+
+               if (dssdev->dev->of_node == NULL)
+                       continue;
+
+               id = of_alias_get_id(dssdev->dev->of_node, "display");
+               if (id == 0)
+                       return dssdev;
+       }
+
        /* return the first display we have in the list */
        return fbdev->displays[0].dssdev;
 }