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TUSB8042A: USB-A ports will not enter compliance mode

Part Number: TUSB8042A

Tool/software:

Hello,

My company is developing a device with USB-A ports, and as part of testing, we need the ports to enter TX compliance mode. This post says that to get the ports into compliance mode, a command must be issued in the USB system to change the port link state. I have implemented the command using libusb but the ports never change to compliance mode.

Does anybody know why the command isn't working? Is there some other way to get the ports into TX compliance mode?

I appreciate your help.

-Sam