linux-kernel - Re: [PATCH v3 2/5] ASoC: codecs: msm8916-wcd-analog: get micbias voltage from dt

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Date:   Fri, 11 Aug 2017 16:15:47 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Banajit Goswami <bgoswami@...eaurora.org>,
        alsa-devel@...a-project.org, damien.riegel@...oirfairelinux.com,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Patrick Lai <plai@...eaurora.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/5] ASoC: codecs: msm8916-wcd-analog: get micbias
 voltage from dt



On 10/08/17 16:24, Mark Brown wrote:
> On Wed, Aug 09, 2017 at 06:49:24PM +0200, srinivas.kandagatla@...aro.org wrote:
> 
>> -	snd_soc_write(codec, CDC_A_MICB_1_VAL, MICB_1_VAL_MICB_OUT_VAL_V2P70V);
>> -	/*
>> -	 * Special headset needs MICBIAS as 2.7V so wait for
>> -	 * 50 msec for the MICBIAS to reach 2.7 volts.
>> -	 */
>> -	msleep(50);
>> +	if (wcd->micbias_mv)
> 
> We seem to have just completely lost this ramp time handling?
Yes, will take care of this in next version.

>