Need some help on next steps Who will do the review and patch merge? Should i add any other mailing list to this thread?
-----Original Message----- From: John Hsu [mailto:KCHSU0@nuvoton.com] Sent: Friday, December 15, 2017 12:47 PM To: Kumar, Abhijeet abhijeet.kumar@intel.com Cc: Liam Girdwood lgirdwood@gmail.com; Mark Brown broonie@kernel.org; Jaroslav Kysela perex@perex.cz; Takashi Iwai tiwai@suse.com; Bhumika Goyal bhumirks@gmail.com; alsa-devel@alsa-project.org; linux-kernel@vger.kernel.org; anatol.pomozov@gmail.com; mhkuo@nuvoton.com; wuchengli@google.com; cychiang@google.com; Chiang, Mac mac.chiang@intel.com; YHCHuang@nuvoton.com; CTLIN0@nuvoton.com; WTLI@nuvoton.com Subject: Re: [PATCH] ASoC: nau8825: fix issue that pop noise when start capture
On 12/12/2017 3:10 AM, abhijeet.kumar@intel.com wrote:
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;
The solution is fine for me. It's verified in my device and indeed helps to reduce the capture pop noise. I think the little delay is acceptable.
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