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ASoC: wcd934x: Add impedance detection controls

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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: Phani Kumar Uppalapati <phaniu@codeaurora.org>
This commit is contained in:
Phani Kumar Uppalapati 2016-10-28 11:38:59 -07:00
parent ce610f2fc9
commit 13a491c72c
1 changed files with 32 additions and 0 deletions
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32
sound/soc/codecs/wcd934x/wcd934x-mbhc.c
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@ -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));