testdisplay: Test the first mode if there is no preferred mode.

For a TV device, there  might be no preferred mode. In this case,
we can test the first mode.

Signed-off-by: Hai Lan <hai.lan@intel.com>

diff --git a/tests/testdisplay.c b/tests/testdisplay.c
index e8e3309..dae52ca 100644 (file)
--- a/tests/testdisplay.c
+++ b/tests/testdisplay.c
@@ -325,9 +325,16 @@ static void connector_find_preferred_mode(struct connector *c)
        }
 
        if (!c->mode_valid) {
-               fprintf(stderr, "failed to find any modes on connector %d\n",
-                       c->id);
-               return;
+               if (connector->count_modes > 0) {
+                       /* use the first mode as test mode */
+                       c->mode = connector->modes[0];
+                       c->mode_valid = 1;
+               }
+               else {
+                       fprintf(stderr, "failed to find any modes on connector %d\n",
+                               c->id);
+                       return;
+               }
        }
 
        /* Now get the encoder */