[ALSA] Fix bugs in mode change/recalibration for opl3sa2 driver

The mode change / recalibration doesn't work always with opl3sa2 devices,
e.g. the first time it's played back.  The patch fixes the problem.

Signed-off-by: Paul Vojta <vojta@math.berkeley.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/isa/cs423x/cs4231_lib.c b/sound/isa/cs423x/cs4231_lib.c
index 914d77b61b0c..642bdaa703be 100644
--- a/sound/isa/cs423x/cs4231_lib.c
+++ b/sound/isa/cs423x/cs4231_lib.c
@@ -555,6 +555,8 @@ static void snd_cs4231_playback_format(struct snd_cs4231 *chip,
                         snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, chip->image[CS4231_PLAYBK_FORMAT] = pdfr);
                 }
                 spin_unlock_irqrestore(&chip->reg_lock, flags);
+                if (chip->hardware == CS4231_HW_OPL3SA2)
+                        udelay(100);    /* this seems to help */
                 snd_cs4231_mce_down(chip);
         }
         snd_cs4231_calibrate_mute(chip, 0);