[PATCH] ASoC: sgtl5000: fix VAG power up timing

From	Jean-Michel Hautbois <jhautbois@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH] ASoC: sgtl5000: fix VAG power up timing
Date	2015-12-17 11:10 +0100
Message-ID	<qGDFw-6lt-19@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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When power up, a "pop" is heard on line-in and mic-in.
An analysis of the PCM shows it lasts ~400ms
and looks like a filter response.
VAG power up should be delayed by 400ms as VAG power down is.

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@veo-labs.com>
---
 sound/soc/codecs/sgtl5000.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index f540f82..08b4046 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -189,6 +189,7 @@ static int power_vag_event(struct snd_soc_dapm_widget *w,
 	case SND_SOC_DAPM_POST_PMU:
 		snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
 			SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
+		msleep(400);
 		break;
 
 	case SND_SOC_DAPM_PRE_PMD:
-- 
2.6.4

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[PATCH] ASoC: sgtl5000: fix VAG power up timing Jean-Michel Hautbois <jhautbois@gmail.com> - 2015-12-17 11:10 +0100

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