Other Parts Discussed in Thread: TMDS181
The setup runs 4K video:
DP source -> DP-HDMI Adaptor -> 181 Eval -> HDMI Sink MNA
The system runs correctly from power up.
Here are the details of the failure
- When we cycle power to the 181 Eval the video blanks and will not recover
- We get an IIC error of TMDS_Scrambler_Status = N
- When we disconnect and reconnect the HDMI source cable to the 181 Eval, it starts working
- Same failure mode with DP-HDMI Adaptors from other vendors
- Failure also happens when we cycle power to the 181 Eval and the HDMI Sink MNA
- Failure does not happen when we remove the 181 Eval from the system and just cycle power to HDMI Sink MNA
- Failure does not happen when we replace the HDMI Sink MNA with a 4K monitor
- Failure does not happen when we remove the DP-HDMI Adaptor and have a HDMI source
Here are the jumper setting on the Eval board:
J1 2-3
J6 1-2
J4 1-2
J3 open
J12 open
J11 open
J17 open
J15 open
J7 open
J8 1-2
J14 open
Any suggestions to debug the issue?
Thank you!