diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7157b2f422f0..4db241345d06 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -3900,10 +3900,8 @@ void dw_hdmi_suspend(struct device *dev)
 {
 	struct dw_hdmi *hdmi = dev_get_drvdata(dev);
 
-	mutex_lock(&hdmi->mutex);
 	if (hdmi->irq)
 		disable_irq(hdmi->irq);
-	mutex_unlock(&hdmi->mutex);
 	cancel_delayed_work(&hdmi->work);
 	flush_workqueue(hdmi->workqueue);
 	pinctrl_pm_select_sleep_state(dev);