Hi,
On Mon, Jun 03, 2024, Mike Looijmans wrote:
> When disconnecting the USB cable on an LS1028 device, nothing happens
> in userspace, which keeps thinking everything is still up and running.
> Turns out that the DWC3 controller only sends DWC3_DEVICE_EVENT_SUSPEND
> in that case, and not a DWC3_DEVICE_EVENT_DISCONNECT as one would
> expect. As a result, sysfs attribute "state" remains "configured"
> until something resets it.
>
> Forward the "suspended" state to sysfs, so that the "state" at least
> changes into "suspended" when one removes the cable, and hence also
> matches the gadget's state when really suspended.
On disconnection, did you see disconnect interrupt? If so, it should
transition to USB_STATE_NOATTACHED. This change doesn't seem to directly
address your issue. Can you provide the driver tracepoints?
Thanks,
Thinh
>
> Signed-off-by: Mike Looijmans <mike.looijmans@xxxxxxxx>
> ---
>
> drivers/usb/dwc3/gadget.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 4df2661f6675..99e8ea9db600 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -4343,6 +4343,7 @@ static void dwc3_gadget_suspend_interrupt(struct dwc3 *dwc,
> if (!dwc->suspended && next == DWC3_LINK_STATE_U3) {
> dwc->suspended = true;
> dwc3_suspend_gadget(dwc);
> + usb_gadget_set_state(dwc->gadget, USB_STATE_SUSPENDED);
> }
>
> dwc->link_state = next;
> --
> 2.34.1
>
>
> Met vriendelijke groet / kind regards,
>
> Mike Looijmans
> System Expert
>
>
> TOPIC Embedded Products B.V.
> Materiaalweg 4, 5681 RJ Best
> The Netherlands
>
> T: +31 (0) 499 33 69 69
> E: mike.looijmans@xxxxxxxx
> W: https://urldefense.com/v3/__http://www.topic.nl__;!!A4F2R9G_pg!dXv5bN6_FJRVB7pQogk6ZxPOb97r2m4CJ9R2rvxelfjbfNhJjQ9ilRpqRBgO983Jxof9Hs8f8rY6nX1hyIvD6ZNIwnKmb9c$
>
> Please consider the environment before printing this e-mail
