linux-kernel - Re: [PATCH 12/25] ASoC: meson: t9015: add support for A1 SoC family

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Date: Tue, 19 Mar 2024 01:43:20 +0300
From: Jan Dakinevich <jan.dakinevich@...utedevices.com>
To: Mark Brown <broonie@...nel.org>
CC: Neil Armstrong <neil.armstrong@...aro.org>, Jerome Brunet
	<jbrunet@...libre.com>, Michael Turquette <mturquette@...libre.com>, Stephen
 Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>, Kevin Hilman <khilman@...libre.com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>, Liam Girdwood
	<lgirdwood@...il.com>, Linus Walleij <linus.walleij@...aro.org>, Jaroslav
 Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
	<linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <alsa-devel@...a-project.org>,
	<linux-sound@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
	<kernel@...utedevices.com>
Subject: Re: [PATCH 12/25] ASoC: meson: t9015: add support for A1 SoC family



On 3/18/24 16:48, Mark Brown wrote:
> On Sun, Mar 17, 2024 at 07:27:14PM +0300, Jan Dakinevich wrote:
> 
>> Both mic bias and ADC's input mode depends on schematics and should be
>> configurable. What is the better way to give access to these parameters?
>> Device tree?
> 
> Yes.
> 
>>>> +	SOC_SINGLE("ADC Mic Bias Switch", LINEIN_CFG, MICBIAS_EN, 1, 0),
>>>> +	SOC_ENUM("ADC Mic Bias Level", a1_adc_mic_bias_level),
> 
>>> Why would micbias be user controlled rather than a DAPM widget as
>>> normal?
> 
>> Yes, I could use SND_SOC_DAPM_SUPPLY, but it supports only raw values,
>> and doesn't supports enums. Here, I want to use enum to restrict
>> possible values, because only these values mentioned in the
>> documentation that I have.
> 
> A supply is an on/off switch not an enum.  Users should not be selecting
> values at all.

Ok. For me it is great if I am free to move these kcontrols to device tree.

-- 
Best regards
Jan Dakinevich