drm/bridge: sii902x: use display info is_hdmi

Use the pre-parsed information instead of parsing EDID again.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/9350875730b332ab2cac58fcbe7f4812fab567b8.1706038510.git.jani.nikula@intel.com

drivers/gpu/drm/bridge/sii902x.c

@@ -286,12 +286,6 @@ static struct edid *sii902x_get_edid(struct sii902x *sii902x,
 	mutex_lock(&sii902x->mutex);
 
 	edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
-	if (edid) {
-		if (drm_detect_hdmi_monitor(edid))
-			sii902x->sink_is_hdmi = true;
-		else
-			sii902x->sink_is_hdmi = false;
-	}
 
 	mutex_unlock(&sii902x->mutex);
 
@@ -311,6 +305,8 @@ static int sii902x_get_modes(struct drm_connector *connector)
 		kfree(edid);
 	}
 
+	sii902x->sink_is_hdmi = connector->display_info.is_hdmi;
+
 	return num;
 }