diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 3df8a9dbccfef707f97036e060b38ee7a8a1ac31..fd83046d8376bd38ca76746d333a0ec1f0fe2828 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -393,6 +393,7 @@ static void mtk_drm_unbind(struct device *dev)
 	drm_dev_unregister(private->drm);
 	mtk_drm_kms_deinit(private->drm);
 	drm_dev_put(private->drm);
+	private->num_pipes = 0;
 	private->drm = NULL;
 }