diff options
| -rw-r--r-- | firmware/drivers/wm8731l.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/firmware/drivers/wm8731l.c b/firmware/drivers/wm8731l.c index 4f0f249149..62b1b6a81e 100644 --- a/firmware/drivers/wm8731l.c +++ b/firmware/drivers/wm8731l.c @@ -43,6 +43,9 @@ #define IPOD_PCM_LEVEL 0x65 /* -6dB */ +/* use zero crossing to reduce clicks during volume changes */ +#define VOLUME_ZC_WAIT (1<<7) + /* convert tenth of dB volume (-730..60) to master volume register value */ int tenthdb2master(int db) { @@ -159,8 +162,8 @@ int audiohw_set_master_vol(int vol_l, int vol_r) /* 0110000 == -73dB */ /* 0101111 == mute (0x2f) */ - wmcodec_write(LOUTVOL, vol_l); - wmcodec_write(ROUTVOL, vol_r); + wmcodec_write(LOUTVOL, VOLUME_ZC_WAIT | vol_l); + wmcodec_write(ROUTVOL, VOLUME_ZC_WAIT | vol_r); return 0; } |