OMAP: DSS2: Fix crash when panel doesn't define enable_te()

DSI driver didn't check if the panel driver actually implements
enable_te().

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

1 files changed, 9 insertions, 5 deletions

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index 03f85df70749..e32a53c0889f 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -2932,11 +2932,15 @@ static int dsi_set_update_mode(struct omap_dss_device *dssdev,
 
 static int dsi_set_te(struct omap_dss_device *dssdev, bool enable)
 {
-        int r;
-        r = dssdev->driver->enable_te(dssdev, enable);
-        /* XXX for some reason, DSI TE breaks if we don't wait here.
-         * Panel bug? Needs more studying */
-        msleep(100);
+        int r = 0;
+
+        if (dssdev->driver->enable_te) {
+                r = dssdev->driver->enable_te(dssdev, enable);
+                /* XXX for some reason, DSI TE breaks if we don't wait here.
+                 * Panel bug? Needs more studying */
+                msleep(100);
+        }
+
         return r;
 }