RE: [alsa-devel] [PATCH V2 2/2] ASoC: Davinci: machine: Add device tree binding

Hebbar, Gururaja
2013-01-24T10:24:49Z

On Thu, Jan 24, 2013 at 15:43:03, Mark Brown wrote:
> On Thu, Jan 24, 2013 at 10:06:42AM +0000, Hebbar, Gururaja wrote:
>
> > What I meant was that by using this macro (SND_SOC_DAPM_POST_PMU &
> > SND_SOC_DAPM_PRE_PMD) I can just save and restore existing voltage values inside
> > the event. They will not be user configurable (available to user through some widget).
>
> Well, you *could* add separate register control for that

That’s what I am doing using a different register control

+static const char *mic_bias_level_txt[] = { "off", "2V", "2.5V", "AVDD" };
+
+static const struct soc_enum mic_bias_level =
+SOC_ENUM_SINGLE(MICBIAS_CTRL, 6, 4, mic_bias_level_txt);
+
static const struct snd_kcontrol_new aic3x_snd_controls[] = {
/* Output */
SOC_DOUBLE_R_TLV("PCM Playback Volume",
@@ -391,6 +396,9 @@ static const struct snd_kcontrol_new aic3x_snd_controls[] = {
SOC_DOUBLE_R("PGA Capture Switch", LADC_VOL, RADC_VOL, 7, 0x01, 1),

SOC_ENUM("ADC HPF Cut-off", aic3x_enum[ADC_HPF_ENUM]),
+
+ /* Mic Bias Level */
+ SOC_ENUM("Mic Bias Level", mic_bias_level),

> but it's not
> really something that should obviously be exposed to users; usually
> that'd be something that is fixed by the platform via platform data.

Will look into this angle.

>

Going by the way of using extra register control, will my method (code change
attached in prev mail) be sufficient?

Regards,
Gururaja