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

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Date:   Wed, 19 Feb 2020 15:44:25 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>
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 2/2] ASoC: meson: add t9015 internal DAC driver

On Wed, Feb 19, 2020 at 04:27:12PM +0100, Jerome Brunet wrote:
> On Wed 19 Feb 2020 at 15:55, Mark Brown <broonie@...nel.org> wrote:

> >> +	/* Channel Src */
> >> +	SOC_ENUM("Right DAC Source", dacr_in_enum),
> >> +	SOC_ENUM("Left DAC Source",  dacl_in_enum),

> > Ideally these would be moved into DAPM (using an AIF_IN widget for the
> > DAI).

> I can (I initially did) but I don't think it is worth it.

> I would split Playback into 2 AIF for Left and Right, then add a mux to
> select one them if front of both DAC. It will had 4 widgets and 6 routes
> but it won't allow turn anything on or off. There is no PM improvement.

> Do you still want me to change this ?

It can help us track things like external amps connected to the DACs,
especially when we manage to get to the point of tracking individual
audio streams over DAI links.

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