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Commit 13a491c7 authored by Phani Kumar Uppalapati's avatar Phani Kumar Uppalapati
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ASoC: wcd934x: Add impedance detection controls 



Add impedance detection mixer controls used to get
the impedance values of headphone left and right
channels.

CRs-Fixed: 1083198
Change-Id: Ibbca465192c58deba3618d70e36089119c7f3994
Signed-off-by: default avatarPhani Kumar Uppalapati <phaniu@codeaurora.org>
parent ce610f2f

sound/soc/codecs/wcd934x/wcd934x-mbhc.c

+32 −0
Original line number Diff line number Diff line
@@ -870,11 +870,41 @@ static int tavil_get_hph_type(struct snd_kcontrol *kcontrol, 
	return 0;

}



static int tavil_hph_impedance_get(struct snd_kcontrol *kcontrol,

				   struct snd_ctl_elem_value *ucontrol)

{

	uint32_t zl, zr;

	bool hphr;

	struct soc_multi_mixer_control *mc;

	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);

	struct wcd934x_mbhc *wcd934x_mbhc = tavil_soc_get_mbhc(codec);



	if (!wcd934x_mbhc) {

		dev_err(codec->dev, "%s: mbhc not initialized!\n", __func__);

		return -EINVAL;

	}



	mc = (struct soc_multi_mixer_control *)(kcontrol->private_value);

	hphr = mc->shift;

	wcd_mbhc_get_impedance(&wcd934x_mbhc->wcd_mbhc, &zl, &zr);

	dev_dbg(codec->dev, "%s: zl=%u(ohms), zr=%u(ohms)\n", __func__, zl, zr);

	ucontrol->value.integer.value[0] = hphr ? zr : zl;



	return 0;

}



static const struct snd_kcontrol_new hph_type_detect_controls[] = {

	SOC_SINGLE_EXT("HPH Type", 0, 0, UINT_MAX, 0,

		       tavil_get_hph_type, NULL),

};



static const struct snd_kcontrol_new impedance_detect_controls[] = {

	SOC_SINGLE_EXT("HPHL Impedance", 0, 0, UINT_MAX, 0,

		       tavil_hph_impedance_get, NULL),

	SOC_SINGLE_EXT("HPHR Impedance", 0, 1, UINT_MAX, 0,

		       tavil_hph_impedance_get, NULL),

};



/*

 * tavil_mbhc_hs_detect: starts mbhc insertion/removal functionality

 * @codec: handle to snd_soc_codec *
@@ -985,6 +1015,8 @@ int tavil_mbhc_init(struct wcd934x_mbhc **mbhc, struct snd_soc_codec *codec, 
				0;

	}



	snd_soc_add_codec_controls(codec, impedance_detect_controls,

				   ARRAY_SIZE(impedance_detect_controls));

	snd_soc_add_codec_controls(codec, hph_type_detect_controls,

				   ARRAY_SIZE(hph_type_detect_controls));