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Patch "ASoC: nau8825: fix issue that pop noise when start capture" has been added to the 4.14-stable tree

PATCH [email protected] 1 participant 1 message Feb 28, 2018

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This is a note to let you know that I've just added the patch titled

ASoC: nau8825: fix issue that pop noise when start capture

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
asoc-nau8825-fix-issue-that-pop-noise-when-start-capture.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Wed Feb 28 16:23:28 CET 2018

From: Abhijeet Kumar <[email protected]>
Date: Tue, 12 Dec 2017 00:40:25 +0530
Subject: ASoC: nau8825: fix issue that pop noise when start capture

From: Abhijeet Kumar <[email protected]>

[ Upstream commit d070f7c703ef26e3db613f24206823f916272fc6 ]

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.

---
 sound/soc/codecs/nau8825.c |    1 +
 1 file changed, 1 insertion(+)
sound/soc/codecs/nau8825.c +1 -0
@@ -905,6 +905,7 @@ static int nau8825_adc_event(struct snd_
 
 	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;

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/asoc-nau8825-fix-issue-that-pop-noise-when-start-capture.patch