Unverified Commit f5758544 authored Dec 21, 2018 by Katsuhiro Suzuki Committed by Mark Brown Jan 03, 2019

ASoC: rockchip: add workaround for silence of rk3288 ACODEC



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>

parent c3275903

sound/soc/codecs/rk3328_codec.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

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