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Commit 776bf8e6 authored by Sudheer Papothi's avatar Sudheer Papothi
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ASoC: wcd938x: Update DMIC enable sequence on WCD938x 



Update DMIC enable sequence on WCD938x codec to support
audio capture on WCD DMICs.

Change-Id: I432bbc3a89ad6cbf968fa6474b9bbeb4924e2791
Signed-off-by: default avatarSudheer Papothi <spapothi@codeaurora.org>
parent f6dc0839

asoc/codecs/wcd938x/wcd938x.c

+42 −32
Original line number Diff line number Diff line
@@ -961,49 +961,51 @@ static int wcd938x_codec_enable_dmic(struct snd_soc_dapm_widget *w, 
	struct snd_soc_component *component =

				snd_soc_dapm_to_component(w->dapm);

	struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component);

	u16 dmic_clk_reg;

	u16 dmic_clk_reg, dmic_clk_en_reg;

	s32 *dmic_clk_cnt;

	unsigned int dmic;

	char *wname;

	int ret = 0;



	wname = strpbrk(w->name, "012345");



	if (!wname) {

		dev_err(component->dev, "%s: widget not found\n", __func__);

		return -EINVAL;

	}



	ret = kstrtouint(wname, 10, &dmic);

	if (ret < 0) {

		dev_err(component->dev, "%s: Invalid DMIC line on the codec\n",

			__func__);

		return -EINVAL;

	}

	u8 dmic_ctl_shift = 0;

	u8 dmic_clk_shift = 0;

	u8 dmic_clk_mask = 0;



	dev_dbg(component->dev, "%s wname: %s event: %d\n", __func__,

		w->name, event);



	switch (dmic) {

	switch (w->shift) {

	case 0:

	case 1:

		dmic_clk_cnt = &(wcd938x->dmic_0_1_clk_cnt);

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC1_CTL;

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC_RATE_1_2;

		dmic_clk_en_reg = WCD938X_DIGITAL_CDC_DMIC1_CTL;

		dmic_clk_mask = 0x0F;

		dmic_clk_shift = 0x00;

		dmic_ctl_shift = 0x00;

		break;

	case 2:

	case 3:

		dmic_clk_cnt = &(wcd938x->dmic_2_3_clk_cnt);

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC2_CTL;

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC_RATE_1_2;

		dmic_clk_en_reg = WCD938X_DIGITAL_CDC_DMIC2_CTL;

		dmic_clk_mask = 0xF0;

		dmic_clk_shift = 0x04;

		dmic_ctl_shift = 0x01;

		break;

	case 4:

	case 5:

		dmic_clk_cnt = &(wcd938x->dmic_4_5_clk_cnt);

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC3_CTL;

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC_RATE_3_4;

		dmic_clk_en_reg = WCD938X_DIGITAL_CDC_DMIC3_CTL;

		dmic_clk_mask = 0x0F;

		dmic_clk_shift = 0x00;

		dmic_ctl_shift = 0x02;

		break;

	case 6:

	case 7:

		dmic_clk_cnt = &(wcd938x->dmic_6_7_clk_cnt);

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC4_CTL;

		dmic_clk_reg = WCD938X_DIGITAL_CDC_DMIC_RATE_3_4;

		dmic_clk_en_reg = WCD938X_DIGITAL_CDC_DMIC4_CTL;

		dmic_clk_mask = 0xF0;

		dmic_clk_shift = 0x04;

		dmic_ctl_shift = 0x03;

		break;

	default:

		dev_err(component->dev, "%s: Invalid DMIC Selection\n",
@@ -1011,27 +1013,35 @@ static int wcd938x_codec_enable_dmic(struct snd_soc_dapm_widget *w, 
		return -EINVAL;

	};

	dev_dbg(component->dev, "%s: event %d DMIC%d dmic_clk_cnt %d\n",

			__func__, event,  dmic, *dmic_clk_cnt);

			__func__, event,  (w->shift +1), *dmic_clk_cnt);



	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		snd_soc_component_update_bits(component,

				WCD938X_DIGITAL_CDC_DIG_CLK_CTL, 0x80, 0x80);

		/* enable clock scaling */

		snd_soc_component_update_bits(component,

				WCD938X_DIGITAL_CDC_DMIC_CTL, 0x06, 0x06);

				WCD938X_DIGITAL_CDC_AMIC_CTL,

				(0x01 << dmic_ctl_shift), 0x00);

		/* 250us sleep as per HW requirement */

		usleep_range(250, 260);

		/* Setting DMIC clock rate to 2.4MHz */

		snd_soc_component_update_bits(component,

						dmic_clk_reg, 0x07, 0x02);

					      dmic_clk_reg, dmic_clk_mask,

					      (0x03 << dmic_clk_shift));

		snd_soc_component_update_bits(component,

						dmic_clk_reg, 0x08, 0x08);

					      dmic_clk_en_reg, 0x08, 0x08);

		/* enable clock scaling */

		snd_soc_component_update_bits(component,

						dmic_clk_reg, 0x70, 0x20);

				WCD938X_DIGITAL_CDC_DMIC_CTL, 0x06, 0x06);

		wcd938x_tx_connect_port(component, DMIC0 + (w->shift), true);

		break;

	case SND_SOC_DAPM_POST_PMD:

		wcd938x_tx_connect_port(component, DMIC0 + (w->shift), false);

		snd_soc_component_update_bits(component,

				WCD938X_DIGITAL_CDC_AMIC_CTL,

				(0x01 << dmic_ctl_shift),

				(0x01 << dmic_ctl_shift));

		snd_soc_component_update_bits(component,

					      dmic_clk_en_reg, 0x08, 0x00);

		break;



	};

	return 0;

}