Serdes and Domain Crossing tests
- Testing pertaining to domain crossing
- A loopback only works at some phase relations between RX and TX clock
- Likely due to FFSynchronizer issues
- LTSSM got to L0 by itself when the PC was off
- Likely due to parasitic coupling of TX and RX
- Skipping SERDES clock cycles to change the phase between RX and TX clock has been added
- A loopback only works at some phase relations between RX and TX clock