Hello,
Orin Nano Design Guide p.56 mentions about the series resistor (Rs) for HDMI , and explains it as “Series Resistor (RS): Series resistor on P/N path for HDMI 2.0 but not required for HDMI 2.1 (Mandatory to meet HDMI 2.0
Compliance).” If the downstream device is running only at HDMI 1.4 , is this resistor needed?