2015-03-26 19:46:01 +00:00
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From 1a1095927d224403af8ad57c354cc64521bf3081 Mon Sep 17 00:00:00 2001
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2013-07-22 18:41:23 +00:00
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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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2015-03-26 19:46:01 +00:00
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Subject: [PATCH 4/7] ASoC: JZ4740: delay activation of the DAC to work around
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a sound bug.
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2013-07-22 18:41:23 +00:00
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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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---
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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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--- a/sound/soc/codecs/jz4740.c
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+++ b/sound/soc/codecs/jz4740.c
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2015-05-21 19:32:46 +00:00
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@@ -249,12 +249,15 @@ static int jz4740_codec_set_bias_level(s
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2013-07-22 18:41:23 +00:00
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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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