drm/rockchip: cdn-dp: Load firmware if no monitor connected

If no monitor is connected, suspend/resume cycles result in firmware
load errors because the driver attempts to load the firmware while
the system is in suspend state. This results in a kernel warning and
traceback.

Loading the firmware during boot fixes the problem. Note that we can not
just call schedule_work conditionally in cdn_dp_pd_event() if the insertion
status changed. The problem would still be seen if a monitor is connected
for the first time during suspend.
Signed-off-by: NGuenter Roeck <groeck@chromium.org>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Signed-off-by: NChris Zhong <zyw@rock-chips.com>

drivers/gpu/drm/rockchip/cdn-dp-core.c

@@ -1021,7 +1021,6 @@ static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
 	struct cdn_dp_port *port;
 	struct drm_device *drm_dev = data;
 	int ret, i;
-	bool schedule_event = false;
 
 	ret = cdn_dp_parse_dt(dp);
 	if (ret < 0)
@@ -1083,15 +1082,11 @@ static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
 				      "register EXTCON_DISP_DP notifier err\n");
 			goto err_free_connector;
 		}
-
-		if (extcon_get_state(port->extcon, EXTCON_DISP_DP))
-			schedule_event = true;
 	}
 
 	pm_runtime_enable(dev);
 
-	if (schedule_event)
-		schedule_work(&dp->event_work);
+	schedule_work(&dp->event_work);
 
 	return 0;