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 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Feb 28 16:13:29 CET 2018
From: Abhijeet Kumar abhijeet.kumar@intel.com Date: Tue, 12 Dec 2017 00:40:25 +0530 Subject: ASoC: nau8825: fix issue that pop noise when start capture
From: Abhijeet Kumar abhijeet.kumar@intel.com
[ 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.
Signed-off-by: Abhijeet Kumar abhijeet.kumar@intel.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/codecs/nau8825.c | 1 + 1 file changed, 1 insertion(+)
--- a/sound/soc/codecs/nau8825.c +++ b/sound/soc/codecs/nau8825.c @@ -882,6 +882,7 @@ 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 abhijeet.kumar@intel.com are
queue-4.9/asoc-nau8825-fix-issue-that-pop-noise-when-start-capture.patch