diff --git a/src/kernel/linux/v4.19/drivers/phy/mediatek/phy-mtk-pcie.c b/src/kernel/linux/v4.19/drivers/phy/mediatek/phy-mtk-pcie.c
index 0133bee..9b55a59 100644
--- a/src/kernel/linux/v4.19/drivers/phy/mediatek/phy-mtk-pcie.c
+++ b/src/kernel/linux/v4.19/drivers/phy/mediatek/phy-mtk-pcie.c
@@ -585,7 +585,8 @@
 //tianyan@2021.10.21 modify for pcie loopback test start
 	if(!pcie_loopback_test(pcie_phy->sif_base)){
 		pcie_loopback_test_res = true;
-		pr_info("pcie loopback test success!\n");
+		pr_info("pcie loopback test success! GPIO97 output high\n");
+		gpio_direction_output(268+97,1);
 	}
 	(void*)debugfs_create_file("pcie_loopback",
 				    S_IFREG | 0444, NULL,