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

[Takashi Iwai]

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?


Takashi