Sorry, but my default device tree for the Xavier AGX Devkit running Jetpack 4.4 does not look like the one in that thread, mine looks this:
external-connection {
compatible = "simple-bus";
device_type = "external-connection";
#address-cells = <0x1>;
#size-cells = <0x0>;
disp-state {
compatible = "extcon-disp-state";
#extcon-cells = <0x1>;
};
};
Is the default one you showed from the tegra194-p2888-0001-p2822-0000.dts file?