[ALSA] hda-intel - Add workarounds for STAC codecs

Some machines with STAC codecs seem to have problems (e.g. no audible
playback) when the delay in codec-read routine is too short.
I still don't figure out which command sequence causes this problem
(due to lack of test hardware), but it's known that increasing the
delay fixes.  So, added a stupid workaround here temporarily...

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 6 insertions, 2 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 5f2c3ca863db..fe07bdff60d0 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -559,8 +559,12 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec)
                 }
                 if (!chip->rirb.cmds)
                         return chip->rirb.res; /* the last value */
-                udelay(10);
-                cond_resched();
+                if (codec->bus->needs_damn_long_delay)
+                        msleep(2); /* temporary workaround */
+                else {
+                        udelay(10);
+                        cond_resched();
+                }
         } while (time_after_eq(timeout, jiffies));
 
         if (chip->msi) {