xburst: Add 3.10 support

[openwrt/svn-archive/archive.git] / target / linux / xburst / patches-3.10 / 006-ASoC-JZ4740-delay-activation-of-the-DAC-to-work-arou.patch

diff --git a/target/linux/xburst/patches-3.10/006-ASoC-JZ4740-delay-activation-of-the-DAC-to-work-arou.patch b/target/linux/xburst/patches-3.10/006-ASoC-JZ4740-delay-activation-of-the-DAC-to-work-arou.patch
new file mode 100644 (file)
index 0000000..b4b69a8
--- /dev/null
+++ b/target/linux/xburst/patches-3.10/006-ASoC-JZ4740-delay-activation-of-the-DAC-to-work-arou.patch
@@ -0,0 +1,40 @@
+From 46c628ae74578382ec324405dd4caafdbf3838bd Mon Sep 17 00:00:00 2001
+From: Paul Cercueil <paul@crapouillou.net>
+Date: Sat, 16 Jun 2012 19:36:31 +0200
+Subject: [PATCH 06/16] ASoC: JZ4740: delay activation of the DAC to work
+ around a sound bug.
+
+A proper fix of that bug would require a big rewrite of the driver,
+which (I hope) will be done eventually.
+
+Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
+---
+ sound/soc/codecs/jz4740.c |    9 ++++++---
+ 1 file changed, 6 insertions(+), 3 deletions(-)
+
+diff --git a/sound/soc/codecs/jz4740.c b/sound/soc/codecs/jz4740.c
+index 5f607b3..76ff580 100644
+--- a/sound/soc/codecs/jz4740.c
++++ b/sound/soc/codecs/jz4740.c
+@@ -249,12 +249,15 @@ static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
+       case SND_SOC_BIAS_ON:
+               break;
+       case SND_SOC_BIAS_PREPARE:
+-              mask = JZ4740_CODEC_1_VREF_DISABLE |
+-                              JZ4740_CODEC_1_VREF_AMP_DISABLE |
+-                              JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
++              mask = JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
+               value = 0;
+ 
+               regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
++
++              msleep(500);
++              mask = JZ4740_CODEC_1_VREF_DISABLE |
++                                              JZ4740_CODEC_1_VREF_AMP_DISABLE;
++              regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, 0);
+               break;
+       case SND_SOC_BIAS_STANDBY:
+               /* The only way to clear the suspend flag is to reset the codec */
+-- 
+1.7.10.4
+