hi, jock,   please consider the following additions and corrections to dts:   disable i2c5 to get rid of kernel messages like "0xff170000 timeout ..."  &i2c5 { status = "disabled"; };   as a result of the previous editing, change the value of the property of ddc-i2c-bus to i2c4 &hdmi { ddc-i2c-bus = <&i2c4>; #sound-dai-cells = <0>; status = "okay"; };   maybe you forgot, add, please, the element 'dr_mode = "host";' in the