From: Clemens Ladisch <clemens@ladisch.de>
To: Torstein Hegge <hegge@resisty.net>
Cc: alsa-devel@alsa-project.org
Subject: Re: [PATCH v4] ALSA: usb: Work around CM6631 sample rate change bug
Date: Fri, 22 Mar 2013 16:32:19 +0100 [thread overview]
Message-ID: <514C7983.40904@ladisch.de> (raw)
In-Reply-To: <20130319214531.GD7539@pvv.ntnu.no>
Torstein Hegge wrote:
> + if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
> + USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
> + UAC2_CS_CONTROL_SAM_FREQ << 8,
> + snd_usb_ctrl_intf(chip) | (clock << 8),
> + data, sizeof(data))) < 0) {
> + snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n",
> + dev->devnum, iface, fmt->altsetting);
> + return err;
> + }
This code requires that all devices allow reading the sample rate.
When you cannot read the current rate, just assume it needs to be set.
Regards,
Clemens
next prev parent reply other threads:[~2013-03-22 15:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-19 21:45 [PATCH v4] ALSA: usb: Work around CM6631 sample rate change bug Torstein Hegge
2013-03-22 15:32 ` Clemens Ladisch [this message]
2013-03-24 20:46 ` Torstein Hegge
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