linux-kernel - RE: [EXTERNAL] Re: [PATCH] ASoC: max98390: Add controls for tx path

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Date:   Sat, 3 Apr 2021 01:33:54 +0000
From:   Steve Lee <SteveS.Lee@...imintegrated.com>
To:     Mark Brown <broonie@...nel.org>
CC:     "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "perex@...ex.cz" <perex@...ex.cz>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "ckeepax@...nsource.cirrus.com" <ckeepax@...nsource.cirrus.com>,
        "geert@...ux-m68k.org" <geert@...ux-m68k.org>,
        "rf@...nsource.wolfsonmicro.com" <rf@...nsource.wolfsonmicro.com>,
        "shumingf@...ltek.com" <shumingf@...ltek.com>,
        "srinivas.kandagatla@...aro.org" <srinivas.kandagatla@...aro.org>,
        "krzk@...nel.org" <krzk@...nel.org>,
        "dmurphy@...com" <dmurphy@...com>,
        "jack.yu@...ltek.com" <jack.yu@...ltek.com>,
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        "steves.lee.maxim@...il.com" <steves.lee.maxim@...il.com>
Subject: RE: [EXTERNAL] Re: [PATCH] ASoC: max98390: Add controls for tx path

> -----Original Message-----
> From: Mark Brown <broonie@...nel.org>
> Sent: Saturday, April 3, 2021 12:23 AM
> To: Steve Lee <SteveS.Lee@...imintegrated.com>
> Cc: lgirdwood@...il.com; perex@...ex.cz; tiwai@...e.com;
> ckeepax@...nsource.cirrus.com; geert@...ux-m68k.org;
> rf@...nsource.wolfsonmicro.com; shumingf@...ltek.com;
> srinivas.kandagatla@...aro.org; krzk@...nel.org; dmurphy@...com;
> jack.yu@...ltek.com; nuno.sa@...log.com; linux-kernel@...r.kernel.org;
> alsa-devel@...a-project.org; ryan.lee.maxim@...il.com;
> steves.lee.maxim@...il.com
> Subject: [EXTERNAL] Re: [PATCH] ASoC: max98390: Add controls for tx path
> 
> On Fri, Apr 02, 2021 at 12:36:43PM +0900, Steve Lee wrote:
> 
> > +	SOC_SINGLE("Tx Enable Selection", MAX98390_PCM_TX_EN_A,
> > +		0, 255, 0),
> 
> I'm not clear what this is (especially given the source selection below) but it
> looks like it should be a mute control?
Yes, each channel of enable and disable control. 
I will update this also configured by TDM slot configuration.  
> 
> > +	SOC_SINGLE("Tx Hiz Selection", MAX98390_PCM_TX_HIZ_CTRL_A,
> > +		0, 255, 0),
> 
> This I'd expect to be tied into machine driver configuration, either DT properties
> or TDM slot configuration - it's not something that looks like it's something
> you'd want to control at runtime.
I will update this with either TDM slot configuration and DT properties.
> 
> > +	SOC_SINGLE("Tx Source Selection", MAX98390_PCM_CH_SRC_2,
> > +		0, 255, 0),
> 
> This looks like it should be a DAPM control or possibly a TDM slot configuration -
> look at how the Arizona devices handle routing from multiple TDM slots for the
> DAPM version.
This is for Current Sensing and Voltage sensing slot selection. I will update this as DT properties.