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    SubjectRe: [Linux-uvc-devel] [PATCH] Re: uvcvideo: Finally fix Logitech Quickcam for Notebooks Pro
    Date
    On Wednesday 07 October 2009, Gianluca Cecchi wrote:
    > On Wed, Oct 7, 2009 at 2:59 PM, Ondrej Zary
    <linux@rainbow-software.org>wrote:
    > > [snip]
    > >
    > > > 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
    >
    > Could this kind of fix also be useful in my case with Omnivision oem in
    > Dell sp2208wfp monitor, in your opinion?
    > See thread
    > https://lists.berlios.de/pipermail/linux-uvc-devel/2008-February/003076.html
    >
    > incidentally at that time I was using Fedora 8 32bit with kernel
    > 2.6.23.15-137.fc8 that indeed is post 2.6.22....

    I don't know - try it. My patch is not related to 2.6.22 and usb-audio at all.

    --
    Ondrej Zary


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