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From: Alan Stern <stern@rowland.harvard.edu>
To: Ming Lei <tom.leiming@gmail.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Ming Lei <ming.lei@canonical.com>, <linux-media@vger.kernel.org>,
	<linux-usb@vger.kernel.org>,
	Jeremy Kerr <jeremy.kerr@canonical.com>,
	Mauro Carvalho Chehab <mchehab@redhat.com>
Subject: Re: [PATCH] uvcvideo: add fix suspend/resume quirk for Microdia camera
Date: Wed, 13 Jul 2011 11:20:18 -0400 (EDT)	[thread overview]
Message-ID: <Pine.LNX.4.44L0.1107131118550.2156-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <CACVXFVOGiJswRQ+5kJd7HW3Zyow9hrC6+HR=fB5o6o=iH-ca3A@mail.gmail.com>

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On Wed, 13 Jul 2011, Ming Lei wrote:

> Hi,
> 
> On Tue, Jul 12, 2011 at 11:44 PM, Alan Stern <stern@rowland.harvard.edu> wrote:
> > On Tue, 12 Jul 2011, Ming Lei wrote:
> >
> >> Hi Laurent,
> >>
> >> After resume from sleep,  all the ISO packets from camera are like below:
> >>
> >> ffff880122d9f400 3527230728 S Zi:1:004:1 -115:1:2568 32 -18:0:1600
> >> -18:1600:1600 -18:3200:1600 -18:4800:1600 -18:6400:1600 51200 <
> >> ffff880122d9d400 3527234708 C Zi:1:004:1 0:1:2600:0 32 0:0:12
> >> 0:1600:12 0:3200:12 0:4800:12 0:6400:12 51200 = 0c8c0000 0000fa7e
> >> 012f1b05 00000000 00000000 00000000 00000000 00000000
> >>
> >> All are headed with 0c8c0000, see attached usbmon captures.
> >
> > Maybe this device needs a USB_QUIRK_RESET_RESUME entry in quirks.c.
> 
> I will try it, but seems unbind&bind driver don't produce extra usb reset signal
> to the device.
> 
> Also, the problem didn't happen in runtime pm case, just happen in
> wakeup from system suspend case. uvcvideo has enabled auto suspend
> already at default.

Why should system suspend be different from runtime suspend?  Have you
compared usbmon traces for the two types of suspend?

Alan Stern


  reply	other threads:[~2011-07-13 15:20 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-11  9:48 [PATCH] uvcvideo: add fix suspend/resume quirk for Microdia camera Ming Lei
2011-07-11 10:44 ` Laurent Pinchart
2011-07-12  1:21   ` Ming Lei
2011-07-12 10:52     ` Ming Lei
2011-07-12 15:44       ` Alan Stern
2011-07-13  7:43         ` Ming Lei
2011-07-13 15:20           ` Alan Stern [this message]
2011-07-13 15:30             ` Ming Lei
2011-07-13 15:59               ` Alan Stern
2011-07-14  9:16                 ` Ming Lei
2011-07-14 15:03                   ` Alan Stern
2011-07-15  2:08                     ` Ming Lei
2011-07-15 13:53                     ` Ming Lei
2011-07-15 14:27                       ` Alan Stern
2011-07-15 14:44                         ` Ming Lei
2011-07-15 15:25                           ` Alan Stern
2011-07-16  3:51                             ` [PATCH] uvcvideo: add SetInterface(0) in .reset_resume handler Ming Lei
2011-07-31 15:38                               ` Laurent Pinchart
2011-08-01  0:56                                 ` Ming Lei
2011-08-01 11:26                                   ` Laurent Pinchart
2011-08-01 17:39                                     ` Mauro Carvalho Chehab
2011-08-01 22:19                                       ` [GIT PATCH FOR v3.1] uvcvideo: Set alternate setting 0 on resume if the bus has been reset Laurent Pinchart
2011-07-13  8:35         ` [PATCH] uvcvideo: add fix suspend/resume quirk for Microdia camera Ming Lei
2011-07-13  8:38     ` Laurent Pinchart
2011-07-13  8:51       ` Ming Lei
2011-07-13  8:55         ` Oliver Neukum
2011-07-13  8:59         ` Laurent Pinchart
2011-07-13  9:07           ` Ming Lei
2011-07-11 10:51 ` Sergei Shtylyov

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