linux-kernel - Re: [PATCH 2/2] ASoC: Adds support for TAS575x to the pcm512x driver

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Date:   Mon, 11 Sep 2023 13:11:09 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Joerg Schambacher <joerg.hifiberry@...il.com>
Cc:     a-krasser@...com, joerg@...iberry.com,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Zhang Qilong <zhangqilong3@...wei.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ASoC: Adds support for TAS575x to the pcm512x driver

On Mon, Sep 11, 2023 at 01:59:46PM +0200, Joerg Schambacher wrote:
> Am 07.09.2023 um 17:28 hat Mark Brown geschrieben:
> > On Thu, Sep 07, 2023 at 06:21:50PM +0200, Joerg Schambacher wrote:

> > > But in the case of the TAS-devices we even then need the PLL to
> > > drive the AMP clocks.

> > That's definitely a separate quirk, and does sound like it should be
> > driven from the bias management or DAPM more than hw_params.

> Then it makes sense to use a DT-param 'force_pll_on' and even
> remove the compatible string fixes from the patch series.

If this device always needs the PLL then we should just figure it out
from the compatible rather than requiring a DT property which every
system with the device is going to need to set.

> Still, I think, this is the best part of the code to act on the PLL.
> Simply instead of checking 'do we need it or not' just let it run.
> What do you think?

It's probably fine.

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