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Message-Id: <1316090379-30760-8-git-send-email-peter.ujfalusi@ti.com>
Date: Thu, 15 Sep 2011 15:39:29 +0300
From: Peter Ujfalusi <peter.ujfalusi@...com>
To: Samuel Ortiz <samuel.ortiz@...el.com>,
Dmitry Torokhov <dtor@...l.ru>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Liam Girdwood <lrg@...com>
Cc: alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
Misael Lopez Cruz <misael.lopez@...com>
Subject: [PATCH 07/17] ASoC: twl6040: Lower the initial gains
The default gains on outputs/inputs are set to 0dB.
To be able to handle pop noise better, we need to lower
the gains on controls, where it is possible.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
sound/soc/codecs/twl6040.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index 987d9c9..1f6068b 100644
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -269,6 +269,13 @@ static void twl6040_init_chip(struct snd_soc_codec *codec)
/* No imput selected for microphone amplifiers */
twl6040_write_reg_cache(codec, TWL6040_REG_MICLCTL, 0x18);
twl6040_write_reg_cache(codec, TWL6040_REG_MICRCTL, 0x18);
+
+ /* Lower the gains */
+ twl6040_write_reg_cache(codec, TWL6040_REG_HSGAIN, 0xff);
+ twl6040_write_reg_cache(codec, TWL6040_REG_EARCTL, 0x1e);
+ twl6040_write_reg_cache(codec, TWL6040_REG_HFLGAIN, 0x1d);
+ twl6040_write_reg_cache(codec, TWL6040_REG_HFRGAIN, 0x1d);
+ twl6040_write_reg_cache(codec, TWL6040_REG_LINEGAIN, 0);
}
static void twl6040_restore_regs(struct snd_soc_codec *codec)
--
1.7.6.1
--
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