AcoSail/kernel_optimize_test
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ASoC: Optimise configuration of WM8903 DC servo

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Modify the default startup sequence in the chip to set the DC servo
dither level for optimal performance.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2009-04-22 20:32:40 +01:00
parent c2aef4ffd2
commit 4dbfe80971
1 changed files with 5 additions and 0 deletions
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5
sound/soc/codecs/wm8903.c
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@ -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);