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PMice's avatar
PMice
Icon for New Contributor rankNew Contributor
3 days ago

Display port TX SST not working.

Hi,

I am working on an existing project where Display Port Transmitter MST (multi stream) is already present and working.

In the current version I just need to convert that transmitter into a Dispaly Port TX SST (single stream).

The result is that, starting from the design example i got a version which works only up to 3840x2160 30Hz and does not at 3840x2160 60Hz.

In both cases the training is completed and lane allocated adt 5.4GHz. Bun in tha case of 60 Hz I do not see any image.

The Quartus Prime Pro used is 17.1.2 for Windows.

 

I do not know where to check for debug more.

Kind Regards,

Paolo.

 

Transceiver
Video

1 Reply

  • VenT_Altera's avatar
    VenT_Altera
    Icon for Frequent Contributor rankFrequent Contributor
    1 hour ago

    Hi PMice 

    Thanks for reaching out. 

    Based on your description, we’ll need additional design configuration details to proceed with debugging. However, I noticed that you’ve submitted a similar debug request in the APS platform, where there is already an active discussion.
    Since you’re receiving dedicated support from our SME Application Engineer in APS, do you still need assistance on this forum? If this is a duplicate of the APS case, I suggest we close this thread and please continue the discussion in APS. 

    For your reference, you can use our DisplayPort bandwidth calculator tools to verify the total available link bandwidth and ensure it meets the video requirements. DisplayPort IP User Guide: https://docs.altera.com/r/docs/683273/25.3/displayport-ip-user-guide/calculating-video-bandwidth-and-recovered-pixel-clock-frequency  

    Please let me know if you have any concerns. 

    Thanks. 
    Best Regards, 
    Ven Ting