From: Daniel Mack <daniel@caiaq.de>
To: 6275 kson <6275.kson@gmail.com>
Cc: alsa-devel@alsa-project.org, Clemens Ladisch <clemens@ladisch.de>
Subject: Re: USB Audio device syncpipe error
Date: Fri, 10 Sep 2010 08:21:41 +0200 [thread overview]
Message-ID: <20100910062141.GL7159@buzzloop.caiaq.de> (raw)
In-Reply-To: <AANLkTimzCNquUNQapdo4afcwtBYYVHGPH9U-J1xXHqXE@mail.gmail.com>
On Thu, Sep 09, 2010 at 04:51:45PM -0500, 6275 kson wrote:
> Well I basically understand what is wrong. Usbaudio is expecting the packet
> size to be 4 and the value to be encoded as 16.16 because the device is
> operating at high speed. I made the change and my device now shows up
> properly as an output device and playback works but the feedback polling
> interval is incorrect.
>
> Since the feedback endpoint descriptor is not class specific I can see why
> one would expect it to be a usb 2.0 standard endpoint descriptor, however,
> that would mean I should also change my other audio streaming endpoint
> descriptors.
>
> Unfortunately, I'm not sure the proper way to fix this - any advice would be
> appreciated.
Hmm, I don't get your point. Why don't you just change the bInterval
field of your endpoint descriptor? Does your device work with OSX, for
example?
Daniel
next prev parent reply other threads:[~2010-09-10 6:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-08 19:25 USB Audio device syncpipe error 6275 kson
2010-09-08 19:40 ` 6275 kson
2010-09-09 2:25 ` Daniel Mack
2010-09-09 7:50 ` Clemens Ladisch
[not found] ` <AANLkTingHyn2wyJ50uH9GpjnTg_YsL6Q0gzDoVyArvgv@mail.gmail.com>
2010-09-09 21:51 ` 6275 kson
2010-09-10 6:21 ` Daniel Mack [this message]
2010-09-10 7:01 ` Clemens Ladisch
2010-09-13 14:42 ` Alex Lee
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