From 4dbfe8097157fde1f8054f48f991ea45833852cd Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 22 Apr 2009 20:32:40 +0100 Subject: [PATCH] ASoC: Optimise configuration of WM8903 DC servo Modify the default startup sequence in the chip to set the DC servo dither level for optimal performance. Signed-off-by: Mark Brown --- sound/soc/codecs/wm8903.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 27c8b94c0551..de0a58507202 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -978,6 +978,11 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec, wm8903_write(codec, WM8903_CLOCK_RATES_2, WM8903_CLK_SYS_ENA); + /* Change DC servo dither level in startup sequence */ + wm8903_write(codec, WM8903_WRITE_SEQUENCER_0, 0x11); + wm8903_write(codec, WM8903_WRITE_SEQUENCER_1, 0x1257); + wm8903_write(codec, WM8903_WRITE_SEQUENCER_2, 0x2); + wm8903_run_sequence(codec, 0); wm8903_sync_reg_cache(codec, codec->reg_cache); -- 2.34.1