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Commit f2af49a2 authored by Aviral Gupta's avatar Aviral Gupta
Browse files

ASoC: msm8x16-wcd: fix the extra power used during the suspend case 



Power down the static supplies during the suspend and power the
supplies back in the resume. This approach reduces the power
numbers during the suspend use cases.

CRs-Fixed: 671163
Change-Id: Ib03a460b1517f66e992b6655f9b4d29a8df63a7c
Signed-off-by: default avatarAviral Gupta <aviralg@codeaurora.org>
parent 2ecd9b09

sound/soc/codecs/msm8x16-wcd.c

+61 −0
Original line number Diff line number Diff line
@@ -3131,9 +3131,66 @@ static int msm8x16_wcd_codec_remove(struct snd_soc_codec *codec) 
	return 0;

}



static int msm8x16_wcd_enable_static_supplies_to_optimum(

				struct msm8x16_wcd *msm8x16,

				struct msm8x16_wcd_pdata *pdata)

{

	int i;

	int ret = 0;



	for (i = 0; i < msm8x16->num_of_supplies; i++) {

		if (pdata->regulator[i].ondemand)

			continue;

		if (regulator_count_voltages(msm8x16->supplies[i].consumer) <=

			0)

			continue;



		ret = regulator_set_voltage(msm8x16->supplies[i].consumer,

			pdata->regulator[i].min_uv,

			pdata->regulator[i].max_uv);

		if (ret) {

			dev_err(msm8x16->dev,

				"Setting volt failed for regulator %s err %d\n",

				msm8x16->supplies[i].supply, ret);

		}



		ret = regulator_set_optimum_mode(msm8x16->supplies[i].consumer,

			pdata->regulator[i].optimum_ua);

		dev_dbg(msm8x16->dev, "Regulator %s set optimum mode\n",

			 msm8x16->supplies[i].supply);

	}



	return ret;

}



static int msm8x16_wcd_disable_static_supplies_to_optimum(

			struct msm8x16_wcd *msm8x16,

			struct msm8x16_wcd_pdata *pdata)

{

	int i;

	int ret = 0;



	for (i = 0; i < msm8x16->num_of_supplies; i++) {

		if (pdata->regulator[i].ondemand)

			continue;

		if (regulator_count_voltages(msm8x16->supplies[i].consumer) <=

			0)

			continue;

		regulator_set_voltage(msm8x16->supplies[i].consumer, 0,

			pdata->regulator[i].max_uv);

		regulator_set_optimum_mode(msm8x16->supplies[i].consumer, 0);

		dev_dbg(msm8x16->dev, "Regulator %s set optimum mode\n",

				 msm8x16->supplies[i].supply);

	}



	return ret;

}



int msm8x16_wcd_suspend(struct snd_soc_codec *codec)

{

	struct msm8916_asoc_mach_data *pdata = NULL;

	struct msm8x16_wcd *msm8x16 = codec->control_data;

	struct msm8x16_wcd_pdata *msm8x16_pdata = msm8x16->dev->platform_data;



	pdata = snd_soc_card_get_drvdata(codec->card);

	pr_debug("%s: mclk cnt = %d, dis_work_mclk = %d\n",
@@ -3165,6 +3222,7 @@ int msm8x16_wcd_suspend(struct snd_soc_codec *codec) 
		 * mark no activity on mclk in this suspend

		 */

		atomic_set(&pdata->mclk_act, MCLK_SUS_NO_ACT);

	msm8x16_wcd_disable_static_supplies_to_optimum(msm8x16, msm8x16_pdata);

	mutex_unlock(&pdata->cdc_mclk_mutex);

	return 0;

}
@@ -3172,8 +3230,11 @@ int msm8x16_wcd_suspend(struct snd_soc_codec *codec) 
int msm8x16_wcd_resume(struct snd_soc_codec *codec)

{

	struct msm8916_asoc_mach_data *pdata = NULL;

	struct msm8x16_wcd *msm8x16 = codec->control_data;

	struct msm8x16_wcd_pdata *msm8x16_pdata = msm8x16->dev->platform_data;



	pdata = snd_soc_card_get_drvdata(codec->card);

	msm8x16_wcd_enable_static_supplies_to_optimum(msm8x16, msm8x16_pdata);

	pr_debug("%s: mclk cnt = %d, dis_work_mclk = %d\n",

			__func__, atomic_read(&pdata->mclk_rsc_ref),

			atomic_read(&pdata->dis_work_mclk));