[ALSA] Fix the detection of resolution of ac97 controls
AC97 Codec
Fixed the detection of bit resolution of ac97 mixer controls.
This will fix the problem with TI ac97 codecs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 0b024ec..7d2854d 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -1072,9 +1072,9 @@
unsigned short val;
snd_ac97_write(ac97, reg, 0x8080 | cbit[i] | (cbit[i] << 8));
val = snd_ac97_read(ac97, reg);
- if (! *lo_max && (val & cbit[i]))
+ if (! *lo_max && (val & 0x7f) == cbit[i])
*lo_max = max[i];
- if (! *hi_max && (val & (cbit[i] << 8)))
+ if (! *hi_max && ((val >> 8) & 0x7f) == cbit[i])
*hi_max = max[i];
if (*lo_max && *hi_max)
break;