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Date: Tue, 23 Aug 2011 20:21:12 +0300
From: Felipe Balbi <balbi@ti.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Felipe Balbi <balbi@ti.com>, Michal Nazarewicz <mnazarewicz@google.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Yang Rui Rui <ruirui.r.yang@tieto.com>,
        Dave Young <hidave.darkstar@gmail.com>, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCHv3 2/4] usb: gadget: replace "is_dualspeed" with
 "max_speed"
Message-ID: <20110823172111.GD10996@legolas.emea.dhcp.ti.com>
Reply-To: balbi@ti.com
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 <Pine.LNX.4.44L0.1108231141400.2069-100000@iolanthe.rowland.org>
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Hi,

On Tue, Aug 23, 2011 at 11:43:44AM -0400, Alan Stern wrote:
> > if they are both part of the of the same configuration, full speed.
> > Otherwise Audio won't work. If they are part of different
> > configurations, then maximum_speed will be defined by the chosen config,
> > no ?
>=20
> No.  The speed has to be chosen first, when the gadget connects to the=20
> host.  The config isn't chosen until later, after the host retrieves=20
> the various descriptors and decides among them.

true

> > I stand with the fact that if they are part of the same configuration,
> > there's no way around it, storage will have to come down to full speed.
> > Unless I'm missing something.
>=20
> What if they are in different configurations?

then you use the fastest speed between both configurations?

--=20
balbi

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