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Visitor
Visitor
202 Views
Registered: ‎12-16-2014

Displayport TX subsystem cannot output 4K@60Hz

Hi, 

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?

 

 

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Teacher
Teacher
116 Views
Registered: ‎06-16-2013

Hi @boooooob 

 

How do you make sure resolution and video timing on DP Tx ? Using 4K@60Hz monitor ?

If using monitor, is it LCD TV ?

 

>But other smaller Resolution can found TX send Video info @ Vblank.

Also what do you mean it ?

Would you explain more detail ?

 

Best regards,

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Moderator
Moderator
91 Views
Registered: ‎11-09-2015

Hi @boooooob 

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.


Florent
Product Application Engineer - Xilinx Technical Support EMEA
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Moderator
Moderator
34 Views
Registered: ‎11-09-2015

HI @boooooob 

Do you have any update on this? We you able to make it work at 4k60?


Florent
Product Application Engineer - Xilinx Technical Support EMEA
**~ Don't forget to reply, give kudos, and accept as solution.~**
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