Re: [PATCH v3 4/8] ASoC: sun8i-codec-analog: Add amplifier event to fix first delay

From: Maxime Ripard
Date: Tue Jan 31 2017 - 05:35:46 EST

On Tue, Jan 31, 2017 at 11:05:48AM +0100, Mylène Josserand wrote:
> When playing a sound for the first time, a short delay, where the audio
> file is not played, can be noticed.
> On a second play (right after), the sound is played correctly.
> If we wait a short time (~5 sec which corresponds to the aplay
> timeout), the delay is back.
> This patch fixes it by using an event on headphone amplifier.
> It allows to keep the amplifier enable while playing a sound.
> A delay of 700ms allows to wait that the amplifier is powered-up
> before playing the sound.
> Signed-off-by: Mylène Josserand <mylene.josserand@xxxxxxxxxxxxxxxxxx>

Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>


Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering

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