06-26-2020 01:26 PM
we developed a new system that use xilinx Dispalyport TX subsystem(no 1.4, for DP 1.2) to output DP signal. But we found DP TX only can output max resolution 4K@30Hz 297MHz. The 4K@60Hz cannot output.
The system works in Kintex 325t -2. others same with KC705 that have a chip DP130 between DP interface and FPGA.
4K@60Hz format is XVIDC_VM_3840x2160_60_P_RB or XVIDC_VM_3840x2160_60_P. Both did not work. Software come form KC705. we changed for new design. Only change APP, not change for Driver.
We checked GT Lane signal. we found DP TX did not send Video info @ 4k 60Hz. But other smaller Resolution can found TX send Video info @ Vblank.
Do we not set some Registers for Video info?
06-29-2020 02:32 PM
06-30-2020 06:36 AM
Is it a custom board or are you using an evaluation board?
You might want to try with a Xilinx evaluation board with the latest vivado version (using the example design provided) and see what you get.
09-02-2020 01:43 AM
Do you have any update on this? We you able to make it work at 4k60?