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Commit 46ab9249 authored Sep 16, 2015 by Sudheer Papothi

ASoC: wcd9xxx: Restore class h voltage reference resistance



Class-H voltage reference is set to 0 Ohms when headset
is enabled and restore back to default value when headset
is not in use.

Change-Id: I68ab1880bcc6f07686fe3eb60915f45135d1f681
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>

parent 8ffae7c0

sound/soc/codecs/wcd9xxx-common-v2.c

+14 −1

Original line number	Original line	Diff line number	Diff line
	@@ -33,6 +33,13 @@ enum {
	DAC_GAIN_M0P6DB,		DAC_GAIN_M0P6DB,
	};		};

			enum {
			VREF_FILT_R_0OHM = 0,
			VREF_FILT_R_25KOHM,
			VREF_FILT_R_50KOHM,
			VREF_FILT_R_100KOHM,
			};

	static void (clsh_state_fp[NUM_CLSH_STATES_V2])(struct snd_soc_codec ,		static void (clsh_state_fp[NUM_CLSH_STATES_V2])(struct snd_soc_codec ,
	struct wcd_clsh_cdc_data *,		struct wcd_clsh_cdc_data *,
	u8 req_state, bool en, int mode);		u8 req_state, bool en, int mode);
	@@ -256,10 +263,16 @@ static void wcd_clsh_set_hph_mode(struct snd_soc_codec *codec,
	{		{
	u8 val;		u8 val;
	u8 gain;		u8 gain;
			u8 res_val = VREF_FILT_R_0OHM;

	struct wcd9xxx *wcd9xxx = dev_get_drvdata(codec->dev->parent);		struct wcd9xxx *wcd9xxx = dev_get_drvdata(codec->dev->parent);

	switch (mode) {		switch (mode) {
	case CLS_H_NORMAL:		case CLS_H_NORMAL:
			res_val = VREF_FILT_R_50KOHM;
			val = 0x00;
			gain = DAC_GAIN_0DB;
			break;
	case CLS_AB:		case CLS_AB:
	val = 0x00;		val = 0x00;
	gain = DAC_GAIN_0DB;		gain = DAC_GAIN_0DB;
	@@ -277,7 +290,7 @@ static void wcd_clsh_set_hph_mode(struct snd_soc_codec *codec,
	snd_soc_update_bits(codec, WCD9XXX_A_ANA_HPH, 0x0C, val);		snd_soc_update_bits(codec, WCD9XXX_A_ANA_HPH, 0x0C, val);
	if (TASHA_IS_2_0(wcd9xxx->version)) {		if (TASHA_IS_2_0(wcd9xxx->version)) {
	snd_soc_update_bits(codec, WCD9XXX_CLASSH_CTRL_VCL_2,		snd_soc_update_bits(codec, WCD9XXX_CLASSH_CTRL_VCL_2,
	0x30, 0x00);		0x30, (res_val << 4));
	snd_soc_update_bits(codec, WCD9XXX_HPH_REFBUFF_UHQA_CTL,		snd_soc_update_bits(codec, WCD9XXX_HPH_REFBUFF_UHQA_CTL,
	0x07, gain);		0x07, gain);
	}		}