[alsa-devel] [PATCH v3 06/10] ASoC: tegra: Add a control for the headphone switch

[Dylan Reid]

On Wed, Jan 28, 2015 at 3:02 AM, Mark Brown <broonie at kernel.org> wrote:
> On Wed, Jan 28, 2015 at 11:51:04AM +0100, Tomeu Vizoso wrote:
>
>> To be used by userspace when the headphones jack is plugged in.
>
>>  static const struct snd_kcontrol_new tegra_max98090_controls[] = {
>> +     SOC_DAPM_PIN_SWITCH("Headphones"),
>>       SOC_DAPM_PIN_SWITCH("Speakers"),
>>  };
>
> Why is userspace doing this?  If this is supposed to be associated with
> the jack detection I'd expect us to be doing this in kernel.

This is only related to jack detection in that seeing a jack insert or
removal can cause userspace to set or unset it depending on the
current policy.