linux-kernel - Re: [PATCH] usb: typec: tcpm: always rediscover when swapping DR

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Message-ID: <YR0bw+k0S94cmeDS@kroah.com>
Date:   Wed, 18 Aug 2021 16:40:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: typec: tcpm: always rediscover when swapping DR

On Wed, Aug 18, 2021 at 10:02:24PM +0800, Icenowy Zheng wrote:
> 
> 
> 于 2021年8月18日 GMT+08:00 下午9:56:38, Greg Kroah-Hartman <gregkh@...uxfoundation.org> 写到:
> >On Tue, Aug 17, 2021 at 02:00:33PM +0300, Heikki Krogerus wrote:
> >> > >Why is it necessary to do discovery with data role swap in general?
> >> > 
> >> > I think it could be possible for devices to expose different altmode
> >> > with different role.
> >> 
> >> OK. FWIW:
> >> 
> >> Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> >
> >Is this conflicting with https://lore.kernel.org/r/20210816075449.2236547-1-kyletso@google.com ?
> >
> >Which of these two should I take, both?  Neither?
> 
> Don't take this, it's against spec.

Ok, now dropped.  What about the linked patch above?  Does that work for
you instead?

thanks,

greg k-h