Just been going through the OpenWF Display spec and just noticed that there doesn't appear to be any API to control the brightness of a WFDPort (or rather the display hardware connected to a WFDPort of type WFD_PORT_TYPE_INTERNAL)? The closest I can see is WFD_PORT_POWER_MODE which allows toggling between WFD_POWER_MODE_ON and WFD_POWER_MODE_LIMITED_USE, which I guess could be used to "dim" the display.. have I missed something?