Does it matter which side of the switch, the A/B side or the common side, that the HDMI source is located? Datasheet says part needs approx 1v bias. Does it matter which side of the switch the bias is applied to, A/B side or common side? Is the switch truly bidirectional for the TMDS lanes? Can it be used to select between 2 HDMI sources as well as 2 HDMI sinks?