Re: [PATCH 3/3] usb: dwc3: add a quirk for device disconnection issue in Synopsis dwc3 core

Felipe Balbi
2014-12-22T15:38:41Z

[-- Attachment #1: Type: text/plain, Size: 857 bytes --]

On Tue, Dec 16, 2014 at 10:10:28AM +0800, Sneeker Yeh wrote:
> Synopsis DesignWare USB3 IP Core integrated with a config-free
> phy needs special handling during device disconnection to avoid
> the host controller dying.
>
> This quirk makes sure PORT_CSC is cleared after the disable slot
> command when usb device is disconnected from internal root hub,
> otherwise, Synopsis core would fall into a state that cannot use
> any endpoint command. Consequently, device disconnection procedure
> might not be finished because sometimes endpoint need to be stop
> by endpoint stop command issuing.
>
> Symptom usually happens when disconnected device is keyboard,
> mouse, and hub.

you need to point us to the synopsys STARS ticket number. That's the
only way to reference this specific quirk. Add it to a comment
somewhere.