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Commit cf4b68e0 authored by Laxminath Kasam's avatar Laxminath Kasam
Browse files

ASoC: msm8x16-wcd: increase ref buffer current of OPAMP 



In tombak codec, TX degradation issue is seen on TSMC
parts. The present setting of reference buffer current
of 0.5uA is making the reference buffer too slow and
it is not able to keep the reference voltage fixed.
Consequently, noise folding and noise shaping degradation
is seen. Increase the ADC REF Bias to address this issue.

CRs-Fixed: 762776
Change-Id: Iddc953805ea8d278386be906593f0037c028d0cf
Signed-off-by: default avatarLaxminath Kasam <lkasam@codeaurora.org>
parent eec8e250

sound/soc/codecs/msm8x16-wcd.c

+2 −6
Original line number Diff line number Diff line
@@ -1801,7 +1801,6 @@ static int msm8x16_wcd_codec_enable_adc(struct snd_soc_dapm_widget *w, 
	struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_codec *codec = w->codec;

	struct msm8x16_wcd_priv *msm8x16_wcd = snd_soc_codec_get_drvdata(codec);

	u16 adc_reg;

	u8 init_bit_shift;
@@ -1822,9 +1821,6 @@ static int msm8x16_wcd_codec_enable_adc(struct snd_soc_dapm_widget *w, 


	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		if (get_codec_version(msm8x16_wcd) != TOMBAK_1_0)

			snd_soc_update_bits(codec,

			MSM8X16_WCD_A_ANALOG_TX_1_2_OPAMP_BIAS, 0x07, 0x04);

		msm8x16_wcd_codec_enable_adc_block(codec, 1);

		if (w->reg == MSM8X16_WCD_A_ANALOG_TX_2_EN)

			snd_soc_update_bits(codec,
@@ -3539,7 +3535,7 @@ static const struct msm8x16_wcd_reg_mask_val msm8x16_wcd_reg_defaults[] = { 
static const struct msm8x16_wcd_reg_mask_val msm8x16_wcd_reg_defaults_2_0[] = {

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_DIGITAL_SEC_ACCESS, 0xA5),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_DIGITAL_PERPH_RESET_CTL3, 0x0F),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_TX_1_2_OPAMP_BIAS, 0x4B),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_TX_1_2_OPAMP_BIAS, 0x4F),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_NCP_FBCTRL, 0x28),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_SPKR_DRV_CTL, 0x69),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_SPKR_DRV_DBG, 0x01),
@@ -3558,7 +3554,7 @@ static const struct msm8x16_wcd_reg_mask_val msm8909_wcd_reg_defaults[] = { 
	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_DIGITAL_PERPH_RESET_CTL3, 0x0F),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_SEC_ACCESS, 0xA5),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_PERPH_RESET_CTL3, 0x0F),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_TX_1_2_OPAMP_BIAS, 0x4B),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_TX_1_2_OPAMP_BIAS, 0x4C),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_NCP_FBCTRL, 0x28),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_SPKR_DRV_CTL, 0x69),

	MSM8X16_WCD_REG_VAL(MSM8X16_WCD_A_ANALOG_SPKR_DRV_DBG, 0x01),