TPS65987D: Compatibility - not charging with USB-FS

I have a compatibility issue with maintaining a simultaneous charge and data connection.

The configuration is for an embedded application, but is essentially that of a docking station.

Lenovo Tab M10 (Android 11, USB C)

Our PCB:

TPS65987DDH with 5V source (and TPS65987EVM has the same issue)

TPS2046 USB-FS

A Samsung Galaxy tablet works perfectly.

Port config 0x28

            UFP

            Standard full feature usb c

            VCONN supported as UFP/DFP

Port control 0x29

            Process swap to source

            Initaite swap to source

            Process swap to UFP

            Initaite swap to UFP

            Externally powered

Lenovo same config: charge starts and is dropped, in an infinite loop.  No USB-FS connections.

Lenovo, charge but no data

Same settings, except:

Port control 0x29

            No Initaite swap to UFP

Lenovo, no charge but data

Same settings, except:

Port config 0x28

            DFP

Global System Config 0x27

            All PP disabled

And, J5 EVM jumper removed, or it goes back into infinite loop

            This is unexpected behavior.

I understand part of the issue could be a different Lenovo config.  But, as this looks like a docking station, I don’t expect it is unsupported.

How might we start to debug this?

Also, the Application Customization Tool does not seem to handle configuration mode properly when in debug mode, current values do not display properly.  Exiting debug mode, the configuration registers seem to work again.

TPS65981_2_7_8 Application Customization Tool

GUI Version :  6.1.2

And, when using the Application Customization Tool to set Transmit Source Capabilities - Source PDO - Maximum Current to 1A, many registers seem to be corrupted.  An extended power down seems to be the only way to reset.  When setting this register from my application over I2C on my board, everything seems ok.  So, the issue seems to be with the Application Customization Tool.

Thanks!