linux-kernel - Re: [PATCH] ASoC: max98090

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Date:   Tue, 1 Aug 2017 14:25:10 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, Hsin-Yu Chao <hychao@...omium.org>
Subject: Re: [PATCH] ASoC: max98090 - Expose HP out enable.

On Mon, Jul 24, 2017 at 11:05:25AM +0200, Enric Balletbo i Serra wrote:
> From: Hsin-Yu Chao <hychao@...omium.org>
> 
> Expose the headphone output enables to user space.  This will allow
> userspace to ensure that there is stable output before the headphones
> are turned on, avoiding a pop on insertion.

If the user needs to force the headphones on for some reason they should
be using the existing DAPM mechanisms to do it, either just playing
audio continuously or having the machine driver force enable things.

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