07-23-2018 08:24 AM
I'm working on a custom board with Displayport IP, I used the example design to start debugging my hardware. Actually the receiver section seems to work properly, as I connect my videocard, my board is recognized as a new 4K monitor and in the MSA rx attributes I read the correct values of the input video.
Now I'm trying to check the tx section, always using the example provided with the IP as a starting point.
I see that the AUX channel is working properly as I'm able to read the monitor EDID and preferred resolution 3840x2160@60Hz etc...
The Tx section is connected to a video pattern generator (Xilinx IP) with video resolution 3840x2160, as I connect the monitor I see:
SS INFO:Training passed at link rate:0x14 lane count:4
SS INFO: Link bandwidth = 2160000 Kbps and video bandwidth = 1782000 Kbps
SS INFO:SST: Config done!
SS INFO:Link is UP after main link enabled!
SS INFO:Enabled main link!
So I think that the training is pass and everything is properly configured but the monitor tell me no signal, I'm missing something?
In the board I'm using SN75DP130 as PHY redriver, I didn't change the default setup as I think is already correct, I've to use a particular setup? As the training pass, I think the redriver has done his job of monitoring AUX channel and change his output levels.
I saw with the debug that the axi stream from the pattern generator and the tx subsystem is running, I check various registers of the IP and all seems ok.
07-24-2018 08:40 AM
07-25-2018 03:47 AM
thanks for the answer, already check the first 4 points and are ok, I don't have a working log, so I can't compare my register dump.
Actually I'm unable to check DPCD as SDK is not working and I'm looking for a solution. I will let you know as soon as possible.
08-14-2018 07:51 AM
08-20-2018 11:21 PM
10-24-2018 04:11 AM
I would like to check if you had any updates on this topic? I guess you had as we haven't heard from you for few months :)
Is it possible for you to share your solution with the community?
10-24-2018 06:18 AM