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ASoC: rockchip: add workaround for silence of rk3288 ACODEC

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This patch adds reset and precharge in shutdown of PCM device.

ACODEC goes to silence if we change Fs to 44.1kHz from 48kHz. This
workaround seems to work but I don't know this workaround is correct
sequence or not for ACODEC.

Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Katsuhiro Suzuki 2018-12-21 00:36:36 +09:00 committed by Mark Brown
parent c32759035a
commit f5758544d9
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 1 deletions
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5
sound/soc/codecs/rk3328_codec.c
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@ -261,9 +261,12 @@ static int rk3328_codec_close_playback(struct rk3328_codec_priv *rk3328)
mdelay(1);
}
/* Workaround for silence when changed Fs 48 -> 44.1kHz */
rk3328_codec_reset(rk3328);
regmap_update_bits(rk3328->regmap, DAC_PRECHARGE_CTRL,
DAC_CHARGE_CURRENT_ALL_MASK,
DAC_CHARGE_CURRENT_I);
DAC_CHARGE_CURRENT_ALL_ON);
return 0;
}