linux-kernel - Re: [PATCH v3 0/9] Tegra xHCI support

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Message-ID: <CAL1qeaF7U9aoBp5gQPS=r+pe6krKmXdP1qak2gjhNqQMoHFB8A@mail.gmail.com>
Date:	Mon, 8 Sep 2014 09:22:11 -0700
From:	Andrew Bresticker <abrestic@...omium.org>
To:	Tomeu Vizoso <tomeu@...euvizoso.net>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Grant Likely <grant.likely@...aro.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Arnd Bergmann <arnd@...db.de>,
	Kishon Vijay Abraham I <kishon@...com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v3 0/9] Tegra xHCI support

On Mon, Sep 8, 2014 at 8:34 AM, Tomeu Vizoso <tomeu@...euvizoso.net> wrote:
> On 2 September 2014 23:34, Andrew Bresticker <abrestic@...omium.org> wrote:
>>
>> Tested on Venice2, Jetson TK1, and Big with a variety of USB2.0 and
>> USB3.0 memory sticks and ethernet dongles using controller firmware
>> recently posted by Andrew Chew [2].
>
> I have had mixed results when testing this on a Jetson TK1 board. Of 8
> USB devices I tested with, about half where probed correctly, but the
> other half repeatedly fail in hub_port_init because in the GET_STATUS
> right after the reset, the C_PORT_CONNECTION bit is set.
>
> I don't see any correlation between the failure and the kind of usb
> device, but I don't have much experience with USB implementations
> either.

Hmm... I haven't seen that before.  Which particular devices were you using?
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