linux-kernel - [PATCH] ASoC: tlv320aic32x4: SND_SOC_DAPM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 9 Jan 2019 22:41:21 +0530
From:   b-ak <anur.bhargav@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: tlv320aic32x4: SND_SOC_DAPM_MICBIAS is deprecated

SND_SOC_DAPM_MICBIAS is deprecated, replace it with SND_SOC_DAPM_SUPPLY.

MICBIAS voltage wasn't supplied to the microphone with the older
SND_SOC_DAPM_MICBIAS widget, hence the microphone wouldn't work.

This patch fixes the problem.

Signed-off-by: b-ak <anur.bhargav@...il.com>
---
 sound/soc/codecs/tlv320aic32x4.c | 30 +++++++++++++++++++++++++++++-
 sound/soc/codecs/tlv320aic32x4.h |  1 +
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index e2b5a11b16d1..521663d8b585 100644
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -79,6 +79,32 @@ struct aic32x4_priv {
 	struct device *dev;
 };
 
+static int mic_bias_event(struct snd_soc_dapm_widget *w,
+	struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		/* Change Mic Bias Registor */
+		snd_soc_component_update_bits(component, AIC32X4_MICBIAS,
+				AIC32x4_MICBIAS_MASK,
+				AIC32X4_MICBIAS_LDOIN |
+				AIC32X4_MICBIAS_2075V);
+		printk(KERN_DEBUG "%s: Mic Bias will be turned ON\n", __func__);
+		break;
+	case SND_SOC_DAPM_PRE_PMD:
+		snd_soc_component_update_bits(component, AIC32X4_MICBIAS,
+				AIC32x4_MICBIAS_MASK, 0);
+		printk(KERN_DEBUG "%s: Mic Bias will be turned OFF\n",
+				__func__);
+		break;
+	}
+
+	return 0;
+}
+
+
 static int aic32x4_get_mfp1_gpio(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
@@ -450,7 +476,9 @@ static const struct snd_soc_dapm_widget aic32x4_dapm_widgets[] = {
 	SND_SOC_DAPM_MUX("IN3_R to Left Mixer Negative Resistor", SND_SOC_NOPM, 0, 0,
 			in3r_to_lmixer_controls),
 
-	SND_SOC_DAPM_MICBIAS("Mic Bias", AIC32X4_MICBIAS, 6, 0),
+	SND_SOC_DAPM_SUPPLY("Mic Bias", AIC32X4_MICBIAS, 6, 0, mic_bias_event,
+			SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+
 
 	SND_SOC_DAPM_OUTPUT("HPL"),
 	SND_SOC_DAPM_OUTPUT("HPR"),
diff --git a/sound/soc/codecs/tlv320aic32x4.h b/sound/soc/codecs/tlv320aic32x4.h
index e9df49edbf19..c2d74025bf4b 100644
--- a/sound/soc/codecs/tlv320aic32x4.h
+++ b/sound/soc/codecs/tlv320aic32x4.h
@@ -195,6 +195,7 @@ int aic32x4_remove(struct device *dev);
 /* AIC32X4_MICBIAS */
 #define AIC32X4_MICBIAS_LDOIN		BIT(3)
 #define AIC32X4_MICBIAS_2075V		0x60
+#define AIC32x4_MICBIAS_MASK            GENMASK(6, 3)
 
 /* AIC32X4_LMICPGANIN */
 #define AIC32X4_LMICPGANIN_IN2R_10K	0x10
-- 
2.19.1