if it uses 'power' (aside wire resistance) is not passive, e.g. I'd consider resistors, capacitors, coils - passive, even I'd agree about diodes, even though th

if it uses 'power' (aside wire resistance) is not passive, e.g. I'd consider resistors, capacitors, coils - passive, even I'd agree about diodes, even though they'd add latency. DP->HDMI requires some electronics (a level shifter) as bare min.