lkml.org 
[lkml]   [2009]   [Oct]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] Re: uvcvideo: Finally fix Logitech Quickcam for Notebooks Pro
Date
On Tuesday 06 October 2009, Ondrej Zary wrote:
> Hello,
> I have a Logitech Quickcam for Notebooks Pro camera (046d:08c3) which just
> does not work even with kernel 2.6.31 and has never worked well before.
>
> On http://linux-uvc.berlios.de/, there are two problems listed. I want to
> really fix these two problems so the camera will just work after plugging
> in (and not disconnect). I started with problem no. 2 as this causes the
> camera not to work at all when plugged in:
>
> usb 5-2.4: new high speed USB device using ehci_hcd and address 7
> usb 5-2.4: configuration #1 chosen from 1 choice
> uvcvideo: Found UVC 1.00 device <unnamed> (046d:08c3)
> uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling
> workaround.
> uvcvideo: Failed to query (129) UVC probe control : -110 (exp. 26).
> uvcvideo: Failed to initialize the device (-5).
>
> When I do "modprobe snd_usb_audio", then "rmmod snd_usb_audio" and
> finally "modprobe uvcvideo", it works. So it looks like snd_usb_audio does
> some initialization that allows uvcvideo to work. It didn't work at all I
> didn't have snd_usb_audio module compiled.
>
> What was the change that supposedly broke this in 2.6.22?

I discovered that it's not related to usb audio at all. Doing "rmmod uvcvideo"
and "modprobe uvcvideo" repeatedly succeeded after a couple of tries. Increasing
UVC_CTRL_STREAMING_TIMEOUT to 3000 helped (2000 was not enough).


Increase UVC_CTRL_STREAMING_TIMEOUT to fix initialization of
Logitech Quickcam for Notebooks Pro.
This fixes following error messages:
uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
uvcvideo: Failed to query (129) UVC probe control : -110 (exp. 26).
uvcvideo: Failed to initialize the device (-5).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>

--- linux-2.6.31-orig/drivers/media/video/uvc/uvcvideo.h 2009-09-10 00:13:59.000000000 +0200
+++ linux-2.6.31/drivers/media/video/uvc/uvcvideo.h 2009-10-07 13:47:27.000000000 +0200
@@ -304,7 +304,7 @@
#define UVC_MAX_STATUS_SIZE 16

#define UVC_CTRL_CONTROL_TIMEOUT 300
-#define UVC_CTRL_STREAMING_TIMEOUT 1000
+#define UVC_CTRL_STREAMING_TIMEOUT 3000

/* Devices quirks */
#define UVC_QUIRK_STATUS_INTERVAL 0x00000001

--
Ondrej Zary


\
 
 \ /
  Last update: 2009-10-07 15:05    [W:0.078 / U:0.956 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site