Index: src/arm/nxp/imx/imx6q-cm-fx6.dts
--- src/arm/nxp/imx/imx6q-cm-fx6.dts.orig
+++ src/arm/nxp/imx/imx6q-cm-fx6.dts
@@ -55,6 +55,10 @@
 		reg = <0x10000000 0x80000000>;
 	};
 
+	chosen {
+		stdout-path = &uart4;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
