[alsa-devel] Fwd: Re: [PATCH] snd-usb-audio with multiple audio functions
Rolf Meeser
rolfm_9dq at yahoo.de
Mon Jun 6 17:04:11 CEST 2011
Hi Clemens,
On 06/06/2011 01:44 PM, Clemens Ladisch wrote:
> Rolf Meeser wrote:
>> + if (usb_chip[i]&&
>> + (usb_chip[i]->dev == dev)&&
>> + (usb_chip[i]->ctrl_intf)&&
>> + (usb_chip[i]->ctrl_intf->desc.bInterfaceNumber == ifnum)) {
> Many audio devices with multiple vendor-specific interfaces do not have
> a control interface. This code would split them into multiple cards.
>
>
> Regards,
> Clemens
>
Breaking existing setups would indeed be bad!
Can you see an easy way to identify such cards here? Then we could assign a new
card index only in case of a class compliant card, where this is desirable.
Regards,
Rolf
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