Re: [PATCH] usb: typec: Defer checking of valid power role swap to low level drivers

From: Oliver Neukum
Date: Fri May 19 2017 - 06:42:31 EST


Am Donnerstag, den 18.05.2017, 14:08 -0700 schrieb Badhri Jagan
Sridharan:
> > Badhri, would that work for us ?
>
> Yes Geunter that should work as well. Requesting non-pd role swap either through
> current_power_role or current_data_role is virtually the same.

Yes and that is the issue.
If you can do PD and swap power roles, power roles will be swapped
and data connection and driver assignments stay put. However without
PD drivers will be unbound. That means that user space must be made
aware that requesting a power role change will have side effects.

Regards
Oliver