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Commit 6380abb4 authored by Simmi Pateriya's avatar Simmi Pateriya
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ASoC: msm: add support for MIC-GND swap switch 



If the board has a switch to swap the GND and MIC connections for
headset jack, enable the support to flip the switch through gpio
to swap GND and MIC.

CRs-Fixed: 642944
Change-Id: Ifca2c10ef7789925f1c720a79088a376b4a0adcb
Signed-off-by: default avatarSimmi Pateriya <simmip@codeaurora.org>
parent 44e45af8

Documentation/devicetree/bindings/sound/qcom-audio-dev.txt

+17 −4
Original line number Diff line number Diff line
@@ -504,9 +504,17 @@ normally open. 
switch type on target typically the switch type will be normally open or

normally close, value for this property 0 for normally close and 1 for

normally open.

- pinctrl-names : Pincntrl entries to configure the PDM gpio lines accordingly

- pinctrl-0 : This exoplains the active state of the PDM gpio lines

- pinctrl-1 : This exoplains the suspend state of the PDM gpio lines

- pinctrl-names : Pincntrl entries to configure the PDM gpio lines and

		  cross connection switch gpio accordingly

- pinctrl-0 : This explains the active state of the PDM gpio lines

- pinctrl-1 : This explains the suspend state of the PDM gpio lines

- pinctrl-2 : This explains the active state of the cross connection

	      gpio lines

- pinctrl-3 : This explains the suspend state of the cross connection

              gpio lines



Optional Properties:

- qcom,us-euro-gpios : GPIO on which gnd/mic swap signal is coming.



Example:
@@ -517,6 +525,7 @@ Example: 
		qcom,msm-codec-type = "internal";

		qcom,msm-mbhc-hphl-swh = <0>;

		qcom,msm-mbhc-gnd-swh = <0>;

		qcom,cdc-us-euro-gpios = <&msmgpio 120 0>;

		qcom,audio-routing =

			"RX_BIAS", "MCLK",

			"INT_LDO_H", "MCLK",
@@ -527,9 +536,13 @@ Example: 
			"AMIC2", "MIC BIAS Internal2",

			"AMIC3", "MIC BIAS External";

		pinctrl-names = "cdc_pdm_lines_act",

				"cdc_pdm_lines_sus";

				"cdc_pdm_lines_sus",

				"cross_conn_det_act",

				"cross_conn_det_sus";

		pinctrl-0 = <&cdc_pdm_lines_act>;

		pinctrl-1 = <&cdc_pdm_lines_sus>;

		pinctrl-2 = <&cross_conn_det_act>;

		pinctrl-3 = <&cross_conn_det_sus>;

	};



* MSM8974 ASoC Machine driver

sound/soc/codecs/msm8x16-wcd.h

+1 −0
Original line number Diff line number Diff line
@@ -119,6 +119,7 @@ struct msm8x16_wcd_regulator { 


struct msm8916_asoc_mach_data {

	int codec_type;

	int us_euro_gpio;

	atomic_t mclk_rsc_ref;

	atomic_t dis_work_mclk;

	struct mutex cdc_mclk_mutex;

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

+20 −0
Original line number Diff line number Diff line
@@ -441,6 +441,7 @@ static void wcd_mbhc_detect_plug_type(struct wcd_mbhc *mbhc) 
		if (!result1 && !(swap_res & 0x04)) {

			plug_type = PLUG_TYPE_GND_MIC_SWAP;

			pr_debug("%s: Cross connection identified", __func__);

			goto eu_us_switch;

		} else {

			pr_debug("%s: No Cross connection found", __func__);

		}
@@ -468,6 +469,25 @@ static void wcd_mbhc_detect_plug_type(struct wcd_mbhc *mbhc) 
			goto exit;

		}

	}



eu_us_switch:

	if (plug_type == PLUG_TYPE_GND_MIC_SWAP) {

		pr_debug("%s: cross connection found\n", __func__);

		if (mbhc->mbhc_cfg->swap_gnd_mic) {

			pr_debug("%s: US_EU gpio present, flip switch\n",

				__func__);

			if (mbhc->mbhc_cfg->swap_gnd_mic(codec))

				plug_type = PLUG_TYPE_HEADSET;

		}

		/* Disable micbias and schmitt trigger */

		snd_soc_update_bits(codec,

			MSM8X16_WCD_A_ANALOG_MBHC_DET_CTL_2,

			0x6, 0x0);

		snd_soc_update_bits(codec,

			MSM8X16_WCD_A_ANALOG_MICB_2_EN,

			0x80, 0x00);

	}



	pr_debug("%s: Valid plug found, plug type is %d\n",

			 __func__, plug_type);

	wcd_mbhc_find_plug_and_report(mbhc, plug_type);

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

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ struct wcd_mbhc_config { 
	void *calibration;

	bool detect_extn_cable;

	bool mono_stero_detection;

	bool (*swap_gnd_mic) (struct snd_soc_codec *codec);

};



struct wcd_mbhc_intr {

sound/soc/msm/msm8x16.c

+71 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ static struct wcd_mbhc_config mbhc_cfg = { 
	.calibration = NULL,

	.detect_extn_cable = true,

	.mono_stero_detection = false,

	.swap_gnd_mic = NULL,

};



static struct afe_clk_cfg mi2s_rx_clk = {
@@ -82,6 +83,8 @@ struct cdc_pdm_pinctrl_info { 
	struct pinctrl *pinctrl;

	struct pinctrl_state *cdc_pdm_sus;

	struct pinctrl_state *cdc_pdm_act;

	struct pinctrl_state *cross_conn_det_sus;

	struct pinctrl_state *cross_conn_det_act;

};



static struct cdc_pdm_pinctrl_info pinctrl_info;
@@ -970,7 +973,29 @@ static int cdc_pdm_get_pinctrl(struct platform_device *pdev) 
		pr_err("%s: Failed to disable the TLMM pins\n", __func__);

		return -EIO;

	}

	/* get pinctrl handle for cross det pin*/

	pinctrl_info.cross_conn_det_sus = pinctrl_lookup_state(pinctrl,

							"cross_conn_det_sus");

	if (IS_ERR(pinctrl_info.cross_conn_det_sus)) {

		pr_err("%s: Unable to get pinctrl disable state handle\n",

								__func__);

		return -EINVAL;

	}



	pinctrl_info.cross_conn_det_act = pinctrl_lookup_state(pinctrl,

							"cross_conn_det_act");

	if (IS_ERR(pinctrl_info.cross_conn_det_act)) {

		pr_err("%s: Unable to get pinctrl active state handle\n",

								 __func__);

		return -EINVAL;

	}

	/* Reset cross conn det pins to default state*/

	ret = pinctrl_select_state(pinctrl_info.pinctrl,

					pinctrl_info.cross_conn_det_sus);

	if (ret != 0) {

		pr_err("%s: Failed to disable cross conn det pins\n", __func__);

		return -EIO;

	}

	return 0;

}
@@ -998,6 +1023,50 @@ void enable_mclk(struct work_struct *work) 
	mutex_unlock(&pdata->cdc_mclk_mutex);

}



static bool msm8x16_swap_gnd_mic(struct snd_soc_codec *codec)

{

	struct snd_soc_card *card = codec->card;

	struct msm8916_asoc_mach_data *pdata = snd_soc_card_get_drvdata(card);

	int value, ret;



	if (!gpio_is_valid(pdata->us_euro_gpio)) {

		pr_debug("%s: Invalid gpio: %d", __func__, pdata->us_euro_gpio);

		return false;

	}

	ret = pinctrl_select_state(pinctrl_info.pinctrl,

				pinctrl_info.cross_conn_det_act);

	if (ret < 0) {

		pr_err("failed to configure the gpio\n");

		return ret;

	}

	value = gpio_get_value_cansleep(pdata->us_euro_gpio);

	gpio_direction_output(pdata->us_euro_gpio, !value);

	pr_debug("%s: swap select switch %d to %d\n", __func__, value, !value);

	ret = pinctrl_select_state(pinctrl_info.pinctrl,

				pinctrl_info.cross_conn_det_sus);

	if (ret < 0) {

		pr_err("failed to configure the gpio\n");

		return ret;

	}



	return true;

}



static void msm8x16_setup_hs_jack(struct platform_device *pdev,

			struct msm8916_asoc_mach_data *pdata)

{

	pdata->us_euro_gpio = of_get_named_gpio(pdev->dev.of_node,

					"qcom,cdc-us-euro-gpios", 0);

	if (pdata->us_euro_gpio < 0) {

		dev_dbg(&pdev->dev,

			"property %s in node %s not found %d\n",

			"qcom,cdc-us-euro-gpios", pdev->dev.of_node->full_name,

			pdata->us_euro_gpio);

	} else {

		mbhc_cfg.swap_gnd_mic = msm8x16_swap_gnd_mic;

	}

}



static int msm8x16_asoc_machine_probe(struct platform_device *pdev)

{

	struct snd_soc_card *card;
@@ -1065,6 +1134,8 @@ static int msm8x16_asoc_machine_probe(struct platform_device *pdev) 
	}

	card = &bear_cards[pdev->id];



	msm8x16_setup_hs_jack(pdev, pdata);



	card->dev = &pdev->dev;

	platform_set_drvdata(pdev, card);

	snd_soc_card_set_drvdata(card, pdata);