1Common bindings for HDMI CEC adapters 2 3- hdmi-phandle: phandle to the HDMI controller. 4 5- needs-hpd: if present the CEC support is only available when the HPD 6 is high. Some boards only let the CEC pin through if the HPD is high, 7 for example if there is a level converter that uses the HPD to power 8 up or down. 9