Re: A plea for help on mixer support for Fast Track Ultra (8R)

From: Felix Homann <linuxaudio@showlabor.de>
To: Grant Diffey <gdiffey@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>,
	alsa-devel@alsa-project.org, Daniel Mack <zonque@gmail.com>
Subject: Re: A plea for help on mixer support for Fast Track Ultra (8R)
Date: Fri, 20 May 2011 17:52:37 +0200	[thread overview]
Message-ID: <4DD68E45.3010202@showlabor.de> (raw)
In-Reply-To: <BANLkTimS+VrNTsicpJQ30En7cH68VTFOXQ@mail.gmail.com>

I'm not close to my FTU at the moment. So I can't test it myself. Could 
you try interchanging  chn and n in the calls of  
snd_maudio_ftu_create_ctl(mixer, n, chn, name) in 
snd_maudio_ftu_create_mixer().

--Felix

Am 20.05.2011 17:43, schrieb Grant Diffey:
> So something is very whacky with the control map. not sure how to debug
> this.
>
> The original patch felix posted works as I expect this one doesn't where
> should I start debugging this?
>
> Grant.
>
>
> On Sat, May 21, 2011 at 1:08 AM, Grant Diffey<gdiffey@gmail.com>  wrote:
>
>> so this works.. (ie compiles and I get controls that do change volumes of
>> things )
>>
>> I think there's something whacky with the control map. (I can't seem to
>> send Ain5 to out 1 and 2 successfully. but I'll test this with felix's
>> original code.
>>
>> The Ain's are not capture volumes for this device.
>>
>> There's 8 "analog ins" and 8 "software returns" (pcm channels) that are
>> mixed to 8 outputs. all the input gain controls are physical or line +4db
>> level balanced
>>
>> Grant.
>>
>>
>>
>> On Fri, May 20, 2011 at 9:37 PM, Daniel Mack<zonque@gmail.com>  wrote:
>>
>>> On Fri, May 20, 2011 at 1:14 PM, Felix Homann<linuxaudio@showlabor.de>
>>> wrote:
>>>> Sorry, here are the first lines:
>>>>
>>>> [ 4104.510080] usb 1-3: new high speed USB device using ehci_hcd and
>>> address
>>>> 2
>>>> [ 4104.661745] usb 1-3: config 1 interface 3 altsetting 0 bulk endpoint
>>> 0x7
>>>> has invalid maxpacket 8
>>>> [ 4104.661750] usb 1-3: config 1 interface 3 altsetting 0 bulk endpoint
>>> 0x87
>>>> has invalid maxpacket 8
>>>> [ 4104.824137] BUG: unable to handle kernel NULL pointer dereference at
>>>> 0000000000000020
>>>> [ 4104.824147] IP: [<ffffffffa04b0119>]
>>> snd_usb_mixer_controls+0x49/0x1a0
>>>> [snd_usb_audio]
>>> Ok, chip->ctrl_intf needs to be initialized. Next try ...
>>>
>>>
>>> Daniel
>>>
>>
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