[IMX8MP, IMX8MM] How to set registers for USB eye diagram testing

[mayqueen]

As title, our products prepare to mass production BUT face an issue about signal certification.

We need to pass the USB eye diagram testing, but I have no idea how to enable it.

My software setting:

Platforms: IMX8MP(USB3.0), IMX8MM(USB2.0)

OS: Android 12-1.0.0

Kernel: 5.10.72

In addition, we're not connect to USB host connector directly from SOC side (via an USB-HUB), so does IMX8 support  compliance mode for eye diagram testing?

I found some documents about USB eye diagram but cannot download, I'll appreciate if someone can provide the correct link of documents.

Thanks a lot

[Dhruvit]

Hi @mayqueen,

I hope you are doing well.

Please refer to the below Document for the information related to the USB eye diagram and compliance tests.

AN12409 - i.MX 6/7/8 series USB Certification Guide

Thanks & Regards,

Dhruvit Vasavada