From: Jean-Michel Hautbois <jhautbois@gmail.com>
Date: Thu, 17 Dec 2015 10:07:23 +0000 (+0100)
Subject: ASoC: sgtl5000: fix VAG power up timing
X-Git-Tag: v3.16.79~73
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=77bca5f8935ec8f7294cd5c573335214fe0d971e;p=thirdparty%2Fkernel%2Fstable.git

ASoC: sgtl5000: fix VAG power up timing

commit c803cc2dcd722e08020c1ba63bb5ceece4a19fdb upstream.

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>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 31281d24e0095..7b342c59e9473 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -175,6 +175,7 @@ static int power_vag_event(struct snd_soc_dapm_widget *w,
 	case SND_SOC_DAPM_POST_PMU:
 		snd_soc_update_bits(w->codec, SGTL5000_CHIP_ANA_POWER,
 			SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP);
+		msleep(400);
 		break;
 
 	case SND_SOC_DAPM_PRE_PMD: