[alsa-devel] [PATCH] Mixer quirk for QuickCam E 3500

[Alexey Fisher]

Takashi Iwai schrieb:
> At Wed, 22 Jul 2009 07:15:41 +0200,
> Alexey Fisher wrote:
>> Takashi Iwai schrieb:
>>> At Tue, 21 Jul 2009 23:57:46 +0200,
>>> Alexey Fisher wrote:
>>>> Takashi Iwai schrieb:
>>>>> At Tue, 21 Jul 2009 23:10:42 +0200,
>>>>> Alexey Fisher wrote:
>>>>>> 1. E3500 report cval->max more than it actually can handel, so if you
>>>>>> set 95% capture level it will be muted.
>>>>>> 2. betwen cval->min and cval-max(real) is 2940 control units,
>>>>>> but real are only 7.
>>>>>> 3. we found only 7 real control units, with cval->res = 384,
>>>>>> but alsa can't handel less than 10 controls, so make it more
>>>>>> and set cval->res = 192.
>>>>>>
>>>>>> Signed-off-by: Alexey Fisher <bug-track at fisher-privat.net>
>>>>> Thanks for the patch.  The added code looks almost good.
>>>>> But, it's better to put your code into another place, e.g. a bit
>>>>> later so that you don't insert it between the comment and the other
>>>>> code.  Also, if you use switch(), you need break.
>>>>>
>>>>> In your case, simply put a new if () block with a proper comment
>>>>> after that switch() block.  It's not necessarily merged into a single
>>>>> switch.  The compiler should be clever enough.
>>>>>
>>>>> Also, try to keep the patch checkpatch.pl-clean.  Run it once before
>>>>> submitting your patch.
>>>>>
>>>>> Could you fix these and repost?
>>>>>
>>>>>
>>>>> thanks,
>>>>>
>>>>> Takashi
>>>>>
>>>>>> ---
>>>>>>  sound/usb/usbmixer.c |    7 +++++++
>>>>>>  1 files changed, 7 insertions(+), 0 deletions(-)
>>>>>>
>>>>>> diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c
>>>>>> index 4bd3a7a..72562ee 100644
>>>>>> --- a/sound/usb/usbmixer.c
>>>>>> +++ b/sound/usb/usbmixer.c
>>>>>> @@ -995,6 +995,13 @@ static void build_feature_ctl(struct mixer_build *state, unsigned char *desc,
>>>>>>  	/* is not very clear from datasheets */
>>>>>>  	/* I hope that the min value is -15360 for newer firmware --jk */
>>>>>>  	switch (state->chip->usb_id) {
>>>>>> +	case USB_ID(0x046d, 0x09a4):
>>>>>> +		if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
>>>>>> +			snd_printk(KERN_INFO "using volume control quirk for the QuickCam E3500\n");
>>>>>> +			cval->min = 6080;
>>>>>> +			cval->max = 8768;
>>>>>> +			cval->res = 192;
>>>>>> +		}
>>>>>>  	case USB_ID(0x0471, 0x0101):
>>>>>>  	case USB_ID(0x0471, 0x0104):
>>>>>>  	case USB_ID(0x0471, 0x0105):
>>>> There is some thing wrong with this. After suspend and resume this quirk 
>>>> not working. Even replug the cam not help, only reloading of 
>>>> snd_usb_sound will do it work again.
>>> But isn't it irrelevant with your patch?
>>>
>>>
>>> Takashi
>> it should be irrelevant, but some times it doesn't use this quirk. Seems 
>> like it depend on my usb.. so if quirk is not used there passably (if 
>> capture level set to more then 90%) will be no sound on this cam.
>>
>> here is example. On this port it's working fine:
>> ===========================================================================
>> [ 1197.141867] ALSA sound/usb/usbaudio.c:2802: 17:3:1: add audio 
>> endpoint 0x86
>> [ 1198.144187] ALSA sound/usb/usbaudio.c:1295: 17:3:1: cannot get freq 
>> at ep 0x86
>> [ 1198.144344] ALSA sound/usb/usbmixer.c:1017: [5] FU [Mic Capture 
>> Switch] ch = 1, val = 0/1/1
>> [ 1198.917814] ALSA sound/usb/usbmixer.c:1000: using volume control 
>> quirk for the QuickCam E3500
>> [ 1198.917818] ALSA sound/usb/usbmixer.c:1017: [5] FU [Mic Capture 
>> Volume] ch = 1, val = 6080/8768/192
>> [ 1198.972148] ALSA sound/usb/usbaudio.c:1349: setting usb interface 3:1
>> [ 1198.999384] ALSA sound/usb/usbaudio.c:1349: setting usb interface 3:1
>> ==================================================================================
>>
>> and quirk is applied:
>> =================================================================
>> amixer -D hw:1
>> Simple mixer control 'Mic',0
>>    Capabilities: cvolume cvolume-joined cswitch cswitch-joined
>>    Capture channels: Mono
>>    Limits: Capture 0 - 14
>>    Mono: Capture 14 [100%] [34.25dB] [on]
>> ======================================================================
>>
>>
>>
>> On this port it's looks different:
>> ==================================================================
>> [  434.298740] ALSA sound/usb/usbaudio.c:2802: 16:3:1: add audio 
>> endpoint 0x86
>> [  435.296189] ALSA sound/usb/usbaudio.c:1288: 16:3:1: cannot set freq 
>> 16000 to ep 0x86
>> [  435.296346] ALSA sound/usb/usbmixer.c:1017: [5] FU [Mic Capture 
>> Switch] ch = 1, val = 0/1/1
>> [  436.055930] ALSA sound/usb/usbmixer.c:374: cannot get ctl value: req 
>> = 0x83, wValue = 0x200, wIndex = 0x502, type = 4
>> [  436.055936] ALSA sound/usb/usbmixer.c:730: 5:2: cannot get min/max 
>> values for control 2 (id 5)
>> [  436.055954] ALSA sound/usb/usbmixer.c:1000: using volume control 
>> quirk for the QuickCam E3500
>> [  436.055957] ALSA sound/usb/usbmixer.c:1017: [5] FU [Mic Capture 
>> Volume] ch = 1, val = 6080/8768/192
>> [  436.107018] ALSA sound/usb/usbaudio.c:1349: setting usb interface 3:1
>> [  436.133640] ALSA sound/usb/usbaudio.c:1349: setting usb interface 3:1
>> ========================================================================
>>
>> and quirk is not working:
>> =========================================================
>> amixer -D hw:1
>> Simple mixer control 'Mic',0
>>    Capabilities: cvolume cvolume-joined cswitch cswitch-joined
>>    Capture channels: Mono
>>    Limits: Capture 0 - 3072
>>    Mono: Capture 3072 [100%] [23.00dB] [on]
>> ============================================================
>>
>> this can't  be reproduce with every plug in.. but some port have better 
>> possibility to get error. On this kind of port  the setting can be 
>> changed after resume.
> 
> Hm, then it means that chip->usb_id has a different number.
> Could you check with printk?

 From the second dmesg you can see, the quirk was applyed. But for some 
reason overwrite after it did get_min_max. i did some debuging with 
printk but was not able to reproduce this issue. So will leave this 
until i have some more time.