From: Devin Heitmueller <dheitmueller@kernellabs.com>
To: John S Gruber <johnsgruber@gmail.com>
Cc: linux-media@vger.kernel.org
Subject: Re: Hauppage hvr-950q au0828 transfer problem affecting audio and perhaps video
Date: Fri, 4 Dec 2009 10:43:59 -0500 [thread overview]
Message-ID: <829197380912040743q620feb3es60f8cd292c26eb7a@mail.gmail.com> (raw)
In-Reply-To: <44c6f3de0912040631m7a8c195bldf9df89af7df36fa@mail.gmail.com>
On Fri, Dec 4, 2009 at 9:31 AM, John S Gruber <johnsgruber@gmail.com> wrote:
> I produced the dump of URB sizes you requested by adding that printk() line. The
> results are at http://pastebin.com/f26f29133
Hi John,
This is good info (especially since you have kernel timestamps enabled).
Did you have a specific reference to the USB audio spec which said the
packet size has to be on an integer boundary? I took a look at the
spec last night and didn't see anything to that end.
Do you have a proposed patch to usbaudio.c which "works for you"? If
so, feel free to send it along and I will review and provide comments.
If the spec does not require the packets to be on an integer
boundary, perhaps the driver just improperly assumes they will be (and
they were for whatever developer wrote the original code).
Devin
--
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com
next prev parent reply other threads:[~2009-12-04 15:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-04 4:00 Hauppage hvr-950q au0828 transfer problem affecting audio and perhaps video John S Gruber
2009-12-04 4:21 ` Devin Heitmueller
2009-12-04 5:17 ` Devin Heitmueller
2009-12-04 14:31 ` John S Gruber
2009-12-04 15:43 ` Devin Heitmueller [this message]
2009-12-04 21:11 ` John S Gruber
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=829197380912040743q620feb3es60f8cd292c26eb7a@mail.gmail.com \
--to=dheitmueller@kernellabs.com \
--cc=johnsgruber@gmail.com \
--cc=linux-media@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox