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>

diff --git a/sound/soc/codecs/rk3328_codec.c b/sound/soc/codecs/rk3328_codec.c
index 71f3fc2d970c9980c11a8557120563d2d58712ea..f3442a2283ea15d46765134fb2d594b2f231ec29 100644 (file)
--- a/sound/soc/codecs/rk3328_codec.c
+++ b/sound/soc/codecs/rk3328_codec.c
@@ -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;
 }