linux-kernel - Re: [PATCH v2 2/2] ASoC: meson: add t9015 internal DAC driver

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Date:   Wed, 19 Feb 2020 18:30:33 +0100
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        Kevin Hilman <khilman@...libre.com>
Subject: Re: [PATCH v2 2/2] ASoC: meson: add t9015 internal DAC driver


On Wed 19 Feb 2020 at 17:20, Mark Brown <broonie@...nel.org> wrote:

> On Wed, Feb 19, 2020 at 05:16:25PM +0100, Jerome Brunet wrote:
>
>> +	SOC_SINGLE("Playback Mute Switch", VOL_CTRL1, DAC_SOFT_MUTE, 1, 0),
>> +	SOC_DOUBLE_TLV("Playback Volume", VOL_CTRL1, DACL_VC, DACR_VC,
>> +		       0xff, 0, dac_vol_tlv),
>
> Sorry, that should just be plain "Playback Switch" - this can be used by
> applications to present a combined mute/volume control together with the
> Volume control

Ah, Ok. I thought it was important to make difference between Mute
(Playing silence) and a Stream stop ... I guess the app does not care
about such detail. No problem, I'll fix this.

> (though as in this case there's no per-channel control it
> is possible some applications will struggle with that).

alsamixer seems happy enough with it :)