[alsa-devel] [PATCH] ASoC: rt5640: change widgetsequencefordepop

[Lars-Peter Clausen]

On 08/06/2013 12:07 PM, Bard Liao wrote:
>> -----Original Message-----
>> From: Lars-Peter Clausen [mailto:lars at metafoo.de]
>> Sent: Tuesday, August 06, 2013 5:36 PM
>> To: Bard Liao
>> Cc: Mark Brown; Oder Chiou; alsa-devel at alsa-project.org;
>> swarren at nvidia.com; swarren at wwwdotorg.org; lgirdwood at gmail.com; Flove
>> Subject: Re: [alsa-devel] [PATCH] ASoC: rt5640: change
>> widgetsequencefordepop
>>
>> On 08/06/2013 11:13 AM, Bard Liao wrote:
>>>>> I think I need to use SND_SOC_DAPM_SWITCH with
>>>> SOC_DAPM_SINGLE_AUTODISABLE for this control.
>>>>> Am I right?
>>>>> I am trying to do that, but meet a problem.
>>>>> If I set speaker switch unmute before playing music, dapm will mute
>>>>> it
>>>> automatically in power on sequence.
>>>>> The only way I can unmute speaker is set speaker switch unmute while
>>>> playing music.
>>>>
>>>> DAPM should unmute the switch on power up and mute it on power down.
>>>> The Speaker Channel Switch control has the invert flag set did you
>>>> also set the invert flag for the new autodisable control?
>>>
>>> Yes, the related code is as below.
>>> static const struct snd_kcontrol_new spk_l_enable_control =
>>> 	SOC_DAPM_SINGLE_AUTODISABLE("Switch", RT5640_SPK_VOL,
>>> 		RT5640_L_MUTE_SFT, 1, 1);
>>>
>>> static const struct snd_kcontrol_new spk_r_enable_control =
>>> 	SOC_DAPM_SINGLE_AUTODISABLE("Switch", RT5640_SPK_VOL,
>>> 		RT5640_R_MUTE_SFT, 1, 1);
>>>
>>> 	SND_SOC_DAPM_SWITCH("Speaker L Playback", SND_SOC_NOPM, 0, 0,
>>> 			&spk_l_enable_control),
>>> 	SND_SOC_DAPM_SWITCH("Speaker R Playback", SND_SOC_NOPM, 0, 0,
>>> 			&spk_r_enable_control),
>>
>> Looks good. Maybe I got the invert = 1 case wrong somewhere. Can you add a
>> couple of printks and send me the result?
>
> The result is as below.
>
> [    9.418738] new control: Speaker R Playback Switch 1
> [    9.423949] new control: Speaker L Playback Switch 1
>
> root at tegra-ubuntu:/home/ubuntu# amixer cset name="Speaker L Playback Switch" 0
> numid=25,iface=MIXER,name='Speaker L Playback Switch'
>    ; type=BOOLEAN,access=rw------,values=1
>    : values=off
> root at tegra-ubuntu:/home/ubuntu# dmesg -c
> [  163.717158] Speaker L Playback Switch->on_val = 1
> root at tegra-ubuntu:/home/ubuntu#
> root at tegra-ubuntu:/home/ubuntu# amixer cset name="Speaker L Playback Switch" 1
> numid=25,iface=MIXER,name='Speaker L Playback Switch'
>    ; type=BOOLEAN,access=rw------,values=1
>    : values=on
> root at tegra-ubuntu:/home/ubuntu#
> root at tegra-ubuntu:/home/ubuntu# dmesg -c
> [  174.482833] Speaker L Playback Switch->on_val = 0

That looks right, right? on_val is what is going to be written to the control's 
register. And in your case this needs to be 0 for unmute and 1 for mute. So why 
would DAPM mute the control on power-up?

- Lars