From: Clemens Ladisch <clemens@ladisch.de>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alan Stern <stern@rowland.harvard.edu>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
linux-media@vger.kernel.org,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-usb@vger.kernel.org, tglx@linutronix.de,
Takashi Iwai <tiwai@suse.de>,
alsa-devel@alsa-project.org
Subject: [RFC] usb: add usb_fill_iso_urb()
Date: Tue, 17 Jul 2018 08:54:34 +0200 [thread overview]
Message-ID: <d05f2d3a-dfa7-d94a-a115-925158b31b5f@ladisch.de> (raw)
Sebastian Andrzej Siewior wrote:
> sound/ is (almost) the only part where struct usb_iso_packet_descriptor
> init does not fit. It looks like it is done just before urb_submit() and
> could be avoided there (moved to the init funtcion instead).
For playback, the packet lengths change dynamically, because the nominal
sample rate (let alone the actual sample rate) often is not an integer
multiple of the 1 kHz/8 kHz USB frame rate.
Regards,
Clemens
---
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next reply other threads:[~2018-07-17 6:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-17 6:54 Clemens Ladisch [this message]
-- strict thread matches above, loose matches on Subject: below --
2018-08-06 22:02 [RFC] usb: add usb_fill_iso_urb() Sebastian Andrzej Siewior
2018-08-06 21:21 Laurent Pinchart
2018-07-16 22:53 Sebastian Andrzej Siewior
2018-07-13 20:12 Alan Stern
2018-07-13 8:01 Laurent Pinchart
2018-07-13 7:47 Sebastian Andrzej Siewior
2018-07-13 7:29 Greg Kroah-Hartman
2018-07-12 22:35 Sebastian Andrzej Siewior
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=d05f2d3a-dfa7-d94a-a115-925158b31b5f@ladisch.de \
--to=clemens@ladisch.de \
--cc=alsa-devel@alsa-project.org \
--cc=bigeasy@linutronix.de \
--cc=gregkh@linuxfoundation.org \
--cc=laurent.pinchart@ideasonboard.com \
--cc=linux-media@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=stern@rowland.harvard.edu \
--cc=tglx@linutronix.de \
--cc=tiwai@suse.de \
/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;
as well as URLs for NNTP newsgroup(s).