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Commit 08054f05 authored by Yeleswarapu Nagaradhesh's avatar Yeleswarapu Nagaradhesh Committed by Aravind Kumar
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ASoC: msm8x16-wcd: add support to change micbias voltage 



Add provision to adjust the initial micbias voltage as
required for headset detection by specifying the
voltage ranging from 1.6v to 2.85v

Change-Id: Ic52655529810b0c07e5a1d335cbc51fb7f5c1e11
Signed-off-by: default avatarYeleswarapu Nagaradhesh <nagaradh@codeaurora.org>
parent 156aa1e4

Documentation/devicetree/bindings/sound/taiko_codec.txt

+1 −0
Original line number Diff line number Diff line
@@ -382,6 +382,7 @@ Optional properties: 
 - qcom,cdc-on-demand-supplies: List of supplies which can be enabled

				dynamically.

				Supplies in this list are off by default.

 - qcom,cdc-micbias-cfilt-mv : MICBIAS voltage value



Example:

msm8x16_wcd_codec@f000{

sound/soc/codecs/msm8x16-wcd.c

+46 −0
Original line number Diff line number Diff line
@@ -76,6 +76,13 @@ 
#define EAR_PA_DISABLE (0x01 << 3)

#define SPKR_PA_DISABLE (0x01 << 4)



#define MICBIAS_DEFAULT_VAL 1800000

#define MICBIAS_MIN_VAL 1600000

#define MICBIAS_STEP_SIZE 50000



#define VOLTAGE_CONVERTER(value, min_value, step_size)\

	((value - min_value)/step_size);



enum {

	AIF1_PB = 0,

	AIF1_CAP,
@@ -171,6 +178,7 @@ static struct msm8x16_wcd_pdata *msm8x16_wcd_populate_dt_pdata( 
static int msm8x16_wcd_enable_ext_mb_source(struct snd_soc_codec *codec,

					    bool turn_on);

static void msm8x16_trim_btn_reg(struct snd_soc_codec *codec);

static void msm8x16_wcd_set_micb_v(struct snd_soc_codec *codec);



struct msm8x16_wcd_spmi msm8x16_wcd_modules[MAX_MSM8X16_WCD_DEVICE];
@@ -203,6 +211,7 @@ static const struct wcd_mbhc_cb mbhc_cb = { 
	.enable_mb_source = msm8x16_wcd_enable_ext_mb_source,

	.trim_btn_reg = msm8x16_trim_btn_reg,

	.compute_impedance = msm8x16_wcd_compute_impedance,

	.set_micbias_value = msm8x16_wcd_set_micb_v,

};



int msm8x16_unregister_notifier(struct snd_soc_codec *codec,
@@ -566,6 +575,23 @@ static int msm8x16_wcd_dt_parse_vreg_info(struct device *dev, 
	return 0;

}



static void msm8x16_wcd_dt_parse_micbias_info(struct device *dev,

			struct wcd9xxx_micbias_setting *micbias)

{

	const char *prop_name = "qcom,cdc-micbias-cfilt-mv";

	int ret;



	ret = of_property_read_u32(dev->of_node, prop_name,

			&micbias->cfilt1_mv);

	if (ret) {

		dev_dbg(dev, "Looking up %s property in node %s failed",

			prop_name, dev->of_node->full_name);

		micbias->cfilt1_mv = MICBIAS_DEFAULT_VAL;

		return;

	}

	return;

}



static struct msm8x16_wcd_pdata *msm8x16_wcd_populate_dt_pdata(

						struct device *dev)

{
@@ -644,6 +670,7 @@ static struct msm8x16_wcd_pdata *msm8x16_wcd_populate_dt_pdata( 
			goto err;

		}

	}

	msm8x16_wcd_dt_parse_micbias_info(dev, &pdata->micbias);



	return pdata;

err:
@@ -3330,6 +3357,7 @@ static int msm8x16_wcd_device_up(struct snd_soc_codec *codec) 
	msm8x16_wcd_codec_init_reg(codec);

	msm8x16_wcd_update_reg_defaults(codec);



	msm8x16_wcd_set_micb_v(codec);

	wcd_mbhc_stop(&msm8x16_wcd_priv->mbhc);

	wcd_mbhc_start(&msm8x16_wcd_priv->mbhc,

			msm8x16_wcd_priv->mbhc.mbhc_cfg);
@@ -3401,6 +3429,21 @@ void msm8x16_wcd_hs_detect_exit(struct snd_soc_codec *codec) 
}

EXPORT_SYMBOL(msm8x16_wcd_hs_detect_exit);



static void msm8x16_wcd_set_micb_v(struct snd_soc_codec *codec)

{



	struct msm8x16_wcd *msm8x16 = codec->control_data;

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

	u8 reg_val;



	reg_val = VOLTAGE_CONVERTER(pdata->micbias.cfilt1_mv, MICBIAS_MIN_VAL,

			MICBIAS_STEP_SIZE);

	dev_dbg(codec->dev, "cfilt1_mv %d reg_val %x\n",

			(u32)pdata->micbias.cfilt1_mv, reg_val);

	snd_soc_update_bits(codec, MSM8X16_WCD_A_ANALOG_MICB_1_VAL,

			0xF8, (reg_val << 3));

}



static int msm8x16_wcd_codec_probe(struct snd_soc_codec *codec)

{

	struct msm8x16_wcd_priv *msm8x16_wcd_priv;
@@ -3460,6 +3503,9 @@ static int msm8x16_wcd_codec_probe(struct snd_soc_codec *codec) 
	msm8x16_wcd_priv->clock_active = false;

	msm8x16_wcd_priv->config_mode_active = false;



	/* Set initial MICBIAS voltage level */

	msm8x16_wcd_set_micb_v(codec);



	registered_codec = codec;

	modem_state_notifier =

	    subsys_notif_register_notifier("modem",

sound/soc/codecs/wcd-mbhc-v2.c

+2 −3
Original line number Diff line number Diff line
@@ -270,8 +270,7 @@ static int wcd_event_notify(struct notifier_block *self, unsigned long val, 
		snd_soc_update_bits(codec,

				MSM8X16_WCD_A_ANALOG_MICB_2_EN,

				0x18, 0x00);

		snd_soc_write(codec, MSM8X16_WCD_A_ANALOG_MICB_1_VAL,

				0x20);

		mbhc->mbhc_cb->set_micbias_value(codec);

		/* Enable current source again for polling */

		wcd_enable_curr_micbias(mbhc, WCD_MBHC_EN_CS);

		mbhc->is_hs_recording = false;
@@ -864,7 +863,7 @@ static bool wcd_is_special_headset(struct wcd_mbhc *mbhc) 
	}

	snd_soc_update_bits(codec, MSM8X16_WCD_A_ANALOG_MICB_1_CTL, 0x60, 0x00);

	snd_soc_write(codec, MSM8X16_WCD_A_ANALOG_MICB_2_EN, reg);

	snd_soc_write(codec, MSM8X16_WCD_A_ANALOG_MICB_1_VAL, 0x20);

	mbhc->mbhc_cb->set_micbias_value(codec);

	snd_soc_update_bits(codec, MSM8X16_WCD_A_ANALOG_MICB_2_EN, 0x18, 0x00);



	pr_debug("%s: leave\n", __func__);

sound/soc/codecs/wcd-mbhc-v2.h

+1 −0
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ struct wcd_mbhc_cb { 
	int (*enable_mb_source) (struct snd_soc_codec *, bool);

	void (*trim_btn_reg) (struct snd_soc_codec *);

	void (*compute_impedance) (s16 , s16 , uint32_t *, uint32_t *, bool);

	void (*set_micbias_value) (struct snd_soc_codec *);

};



struct wcd_mbhc {