diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-dart-dt8mcustomboard.dts b/arch/arm64/boot/dts/freescale/imx8mm-var-dart-dt8mcustomboard.dts
index 80db1b6cfa30..444f71122e65 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-dart-dt8mcustomboard.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-dart-dt8mcustomboard.dts
@@ -258,8 +258,8 @@
 		clock-frequency = <33000000>;
 		hactive = <800>;
 		vactive = <480>;
-		hback-porch = <40>;
-		hfront-porch = <40>;
+		hback-porch = <30>;
+		hfront-porch = <30>;
 		vback-porch = <29>;
 		vfront-porch = <13>;
 		hsync-len = <48>;
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
index aad3108249af..b80b3450023f 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
@@ -274,8 +274,8 @@
 		clock-frequency = <33000000>;
 		hactive = <800>;
 		vactive = <480>;
-		hback-porch = <40>;
-		hfront-porch = <40>;
+		hback-porch = <30>;
+		hfront-porch = <30>;
 		vback-porch = <29>;
 		vfront-porch = <13>;
 		hsync-len = <48>;