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

From: Dylan Reid
Date: Wed Jan 28 2015 - 17:06:37 EST


On Wed, Jan 28, 2015 at 3:02 AM, Mark Brown <broonie@xxxxxxxxxx> 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.
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