Mity CPU Platforms » MitySOM-AM62, MitySOM-AM62A, & MitySOM-AM62P

12/10/2024

JC 03:03 PM Software Development: RE: USB Device mode communication problems

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1449610/am625-backport-disable-usb-lpm-to-6-6-kernel-- Jonathan Cormier

JC 02:44 PM Software Development: RE: USB Device mode communication problems

iseori kang wrote in message#6830:
> Hello,
> ...
Good find. Interestingly in the 6.6 kernel both the AM62A and AM62P have those lpm-disable options for both USB0 and USB1.
https://lore.kernel.org/all/20240412-for-v6-10-am62-usb-t... Jonathan Cormier

IK 09:46 AM Software Development: RE: USB Device mode communication problems

Hello,
The team seems to have solved it with the following settings.
Fixed Dts file
snps,usb2-lpm-disable;
snps,usb2-gadget-lpm-disable;
best regards, iseori kang

IK 03:06 AM Software Development: RE: USB Device mode communication problems

Forwarding additional content
Messages when USB is working
[ 259.298196] drivers/usb/dwc3/gadget.c:3693 dwc3_gadget_interrupt() event->type = 0/Disconnect
[ 267.416974] drivers/usb/dwc3/gadget.c:3693 dwc3_gadget_interrupt() even... iseori kang

IK 12:21 AM Software Development: RE: USB Device mode communication problems

Hello,
We noticed that the message is different for success and failure.
It is only coming from a few laptops.
(Lenovo family more often)
I've attached a schematic, nothing special.
USB1 is being used for internal communicatio... iseori kang