[i.MX7D][Yocto 2.1] How to test PCIe eye pattern

[alex_cheng1]

I want to test PCIe eye pattern for i.MX7 Dual core.
Can you tell me the method of PCIe eye pattern test?

Thank you.

Best Regards,
Alex Cheng

[igorpadykov]

Hi Alex

one can try to follow sect.2.1 TX test configuration and procedures

AN4784 PCIe Certification Guide

https://www.nxp.com/docs/en/application-note/AN4784.pdf 

according to footnote 2 on p.3 :

2. After a far-end termination is determined to be present, the Link Training and

Status State Machine (LTSSM) enters the polling.compliance state and begins transmitting

the compliance pattern on all lanes. Users do not need to enter
any command to force the system into the polling.compliance state after boot.

Best regards
igor
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