[alsa-devel] [PATCH 3/3] ASoC: tlv320aic3x: Add controls for selecting HP power down modes

[Mark Brown]

On Fri, Dec 23, 2016 at 08:47:07PM +0200, Jarkko Nikula wrote:

> This certainly gives more possibilities to control this depending on
> use-case and device idleness. However I think does it find use or will
> it end up being a random choice?

I suspect most people won't understand it but OTOH I can see some
people wanting to use it so...

> Alternative could be some high-impedance widget that defines the output
> mode and what a machine driver wanting lower power consumption can
> connect instead of HP outputs. Another idea that comes to my mind do you
> hear the pop if output is let to be in high-impedance but is driven to
> VCM with some delay before powering up?

I can also see a system tying it to jack detection so you get the pop
reduction if the headphones are physically connected and low power if
they're not there and nothing is going to care anyway.
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