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.