ethtool, cable-test option error

[link]

hardware: Orange Pi Zero H2

Kernel: 5.9.14-sunxi

Armbian 20.11.3 Buster

ethtool version 5.9

 

get error on cable-test option. full log: http://ix.io/2Icy

 

sudo ethtool --cable-test eth0

netlink error: PHY driver does not support cable testing
netlink error: Operation not supported