drm/modes: Don't apply cmdline's rotation if it wasn't specified

The rotation mode from cmdline shouldn't be taken into account if it
wasn't specified in the cmdline. This fixes ignored default display
orientation when display mode is given using cmdline without the
rotation being specified.

Fixes: 1bf4e09 ("drm/modes: Allow to specify rotation and reflection on the commandline")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711021313.29445-1-digetx@gmail.com

drivers/gpu/drm/drm_client_modeset.c

@@ -859,7 +859,7 @@ bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation)
 	 * simple XOR between the two handle the addition nicely.
 	 */
 	cmdline = &connector->cmdline_mode;
-	if (cmdline->specified) {
+	if (cmdline->specified && cmdline->rotation_reflection) {
 		unsigned int cmdline_rest, panel_rest;
 		unsigned int cmdline_rot, panel_rot;
 		unsigned int sum_rot, sum_rest;