[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>
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 5f2c3ca..fe07bdf 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -559,8 +559,12 @@
}
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) {