41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
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From 46c628ae74578382ec324405dd4caafdbf3838bd Mon Sep 17 00:00:00 2001
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From: Paul Cercueil <paul@crapouillou.net>
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Date: Sat, 16 Jun 2012 19:36:31 +0200
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Subject: [PATCH 06/16] ASoC: JZ4740: delay activation of the DAC to work
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around a sound bug.
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A proper fix of that bug would require a big rewrite of the driver,
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which (I hope) will be done eventually.
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Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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---
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sound/soc/codecs/jz4740.c | 9 ++++++---
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1 file changed, 6 insertions(+), 3 deletions(-)
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diff --git a/sound/soc/codecs/jz4740.c b/sound/soc/codecs/jz4740.c
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index 5f607b3..76ff580 100644
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--- a/sound/soc/codecs/jz4740.c
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+++ b/sound/soc/codecs/jz4740.c
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@@ -249,12 +249,15 @@ static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
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case SND_SOC_BIAS_ON:
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break;
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case SND_SOC_BIAS_PREPARE:
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- mask = JZ4740_CODEC_1_VREF_DISABLE |
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- JZ4740_CODEC_1_VREF_AMP_DISABLE |
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- JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
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+ mask = JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
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value = 0;
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regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
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+
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+ msleep(500);
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+ mask = JZ4740_CODEC_1_VREF_DISABLE |
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+ JZ4740_CODEC_1_VREF_AMP_DISABLE;
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+ regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, 0);
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break;
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case SND_SOC_BIAS_STANDBY:
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/* The only way to clear the suspend flag is to reset the codec */
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--
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1.7.10.4
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