ASoC: Disable WM8731 line bypass by default

This avoids temporarily enabling the ouput stages during startup which
can cause audible effets in the output stages.

Reported-by: Fredrik Redgård <rik@svep.se>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index 4cac3195bfa3..9e7ebcc2c491 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -594,6 +594,10 @@ static int wm8731_register(struct wm8731_priv *wm8731)
         reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
         wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100);
 
+        /* Disable bypass path by default */
+        reg = wm8731_read_reg_cache(codec, WM8731_APANA);
+        wm8731_write(codec, WM8731_APANA, reg & ~0x4);
+
         wm8731_codec = codec;
 
         ret = snd_soc_register_codec(codec);