[PATCH 3.16 02/72] ASoC: sgtl5000: fix VAG power up timing

Ben Hutchings
2019-12-08T13:59:20Z

From: Jean-Michel Hautbois <jhautbois@gmail.com>

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>
---
sound/soc/codecs/sgtl5000.c | 1 +
1 file changed, 1 insertion(+)

--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -175,6 +175,7 @@ static int power_vag_event(struct snd_so
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;