From: abhijeet.kumar@intel.com
To: Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>, John Hsu <KCHSU0@nuvoton.com>,
Abhijeet Kumar <abhijeet.kumar@intel.com>,
Bhumika Goyal <bhumirks@gmail.com>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: nau8825: fix issue that pop noise when start capture
Date: Tue, 12 Dec 2017 00:40:25 +0530 [thread overview]
Message-ID: <1513019426-9623-1-git-send-email-abhijeet.kumar@intel.com> (raw)
From: Abhijeet Kumar <abhijeet.kumar@intel.com>
In skylake platform, we hear a loud pop noise(0 dB) at start of
audio capture power up sequence. This patch removes the pop noise
from the recording by adding a delay before enabling ADC.
Signed-off-by: Abhijeet Kumar <abhijeet.kumar@intel.com>
---
sound/soc/codecs/nau8825.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index 714ce17da717..e853a6dfd33b 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -905,6 +905,7 @@ static int nau8825_adc_event(struct snd_soc_dapm_widget *w,
switch (event) {
case SND_SOC_DAPM_POST_PMU:
+ msleep(125);
regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC);
break;
--
1.9.1
next reply other threads:[~2017-12-11 19:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-11 19:10 abhijeet.kumar [this message]
2017-12-15 7:16 ` John Hsu
2017-12-15 8:21 ` Kumar, Abhijeet
2017-12-19 10:58 ` Applied "ASoC: nau8825: fix issue that pop noise when start capture" to the asoc tree Mark Brown
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