linux-kernel - Re: [PATCH v2 2/8] ASoC: codecs: wcd: add common helper for wcd codecs

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Message-ID: <f6a631bb-d17d-4eba-adfc-4db08540f5a0@oss.qualcomm.com>
Date: Fri, 5 Sep 2025 08:03:49 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: broonie@...nel.org, perex@...ex.cz, tiwai@...e.com, srini@...nel.org,
        lgirdwood@...il.com, linux-sound@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        krzysztof.kozlowski@...aro.org, neil.armstrong@...aro.org
Subject: Re: [PATCH v2 2/8] ASoC: codecs: wcd: add common helper for wcd
 codecs

Sorry for some reason I did not notice this email!.

On 8/22/25 12:18 PM, Dmitry Baryshkov wrote:
>> + */
>> +
>> +#ifndef __WCD_COMMON_H__
>> +#define __WCD_COMMON_H___
>> +
>> +#define WCD_MIN_MICBIAS_MV	1000
>> +#define WCD_DEF_MICBIAS_MV	1800
>> +#define WCD_MAX_MICBIAS_MV	2850
> These do not belong to a public header.


All the wcd codecs have same MICBIAS circuitry, this is the internal
micbias circuit we are talking about here.

Actual micbias value comes from device tree, but these are min/max
ranges that are supported by all WCD codecs.

Why do you think it should not be part of common header?

--srini
> 
>> +#define WCD_MAX_MICBIAS		4
>> +
>> +struct wcd_common {
>> +	struct device *dev;
>> +	int max_bias;
>> +	u32 micb_mv[WCD_MAX_MICBIAS];
>> +	u32 micb_vout[WCD_MAX_MICBIAS];
>> +};
>> +
>> +int wcd_get_micb_vout_ctl_val(struct device *dev, u32 micb_mv);
>> +int wcd_dt_parse_micbias_info(struct wcd_common *common);
>> +
>> +#endif /* __WCD_COMMON_H___  */