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Commit 39c26180 authored by Takeshi Kihara's avatar Takeshi Kihara Committed by Mark Brown
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ASoC: ak4642: enable stereo line output power-save mode 



ak4642 has power-save mode for stereo line to reduce pop noise.
This patch enables it.

Signed-off-by: default avatarTakeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 379c4b05

sound/soc/codecs/ak4642.c

+31 −2
Original line number Diff line number Diff line
@@ -97,6 +97,9 @@ 
#define PMMP		(1 << 2) /* MPWR pin Power Management */

#define MGAIN0		(1 << 0) /* MIC amp gain*/



/* SG_SL2 */

#define LOPS		(1 << 6) /* Stero Line-out Power Save Mode */



/* TIMER */

#define ZTM(param)	((param & 0x3) << 4) /* ALC Zero Crossing TimeOut */

#define WTM(param)	(((param & 0x4) << 4) | ((param & 0x3) << 2))
@@ -168,6 +171,29 @@ static const struct snd_kcontrol_new ak4642_lout_mixer_controls[] = { 
	SOC_DAPM_SINGLE("DACL", SG_SL1, 4, 1, 0),

};



/* event handlers */

static int ak4642_lout_event(struct snd_soc_dapm_widget *w,

			     struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);



	switch (event) {

	case SND_SOC_DAPM_PRE_PMD:

	case SND_SOC_DAPM_PRE_PMU:

		/* Power save mode ON */

		snd_soc_update_bits(codec, SG_SL2, LOPS, LOPS);

		break;

	case SND_SOC_DAPM_POST_PMU:

	case SND_SOC_DAPM_POST_PMD:

		/* Power save mode OFF */

		mdelay(300);

		snd_soc_update_bits(codec, SG_SL2, LOPS, 0);

		break;

	}



	return 0;

}



static const struct snd_soc_dapm_widget ak4642_dapm_widgets[] = {



	/* Outputs */
@@ -182,9 +208,12 @@ static const struct snd_soc_dapm_widget ak4642_dapm_widgets[] = { 


	SND_SOC_DAPM_PGA("DACH", MD_CTL4, 0, 0, NULL, 0),



	SND_SOC_DAPM_MIXER("LINEOUT Mixer", PW_MGMT1, 3, 0,

	SND_SOC_DAPM_MIXER_E("LINEOUT Mixer", PW_MGMT1, 3, 0,

			   &ak4642_lout_mixer_controls[0],

			   ARRAY_SIZE(ak4642_lout_mixer_controls)),

			   ARRAY_SIZE(ak4642_lout_mixer_controls),

			   ak4642_lout_event,

			   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |

			   SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),



	/* DAC */

	SND_SOC_DAPM_DAC("DAC", NULL, PW_MGMT1, 2, 0),