linux-kernel - Re: [alsa-devel] [PATCH] Jabra SPEAK 410 USB

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Message-ID: <20111213221426.GG16692@amd.home.annexia.org>
Date:	Tue, 13 Dec 2011 22:14:26 +0000
From:	"Richard W.M. Jones" <rjones@...hat.com>
To:	alsa-devel@...a-project.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] Jabra SPEAK 410 USB - no audio playback

On Sat, Dec 10, 2011 at 07:45:39PM +0000, Richard W.M. Jones wrote:

> diff -uNrp kernel-3.1.fc16.orig/sound/usb/stream.c kernel-3.1.fc16.new/sound/usb/stream.c
> --- kernel-3.1.fc16.orig/sound/usb/stream.c	2011-12-10 18:03:29.658729051 +0000
> +++ kernel-3.1.fc16.new/sound/usb/stream.c	2011-12-10 18:08:41.468694907 +0000
> @@ -164,6 +164,12 @@ static int parse_uac_endpoint_attributes
>  
>  	csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
>  
> +	/* Jabra SPEAK 410 USB has CS_ENDPOINT before ordinary ENDPOINT,
> +	 * which confuses the USB descriptor parsing code.  Try looking
> +	 * for CS_ENDPOINT in the interface->extra - RWMJ. */
> +	if (!csep)
> +		csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT);
> +
>  	/* Creamware Noah has this descriptor after the 2nd endpoint */
>  	if (!csep && altsd->bNumEndpoints >= 2)
>  		csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);


Anyone?  Tested on two different machines and it fixes the
audio output problem on both ...  If I've sent this to the
wrong list please let me know.

Rich.

-- 
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