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authorEliot Blennerhassett <eblennerhassett@audioscience.com>2011-12-22 13:38:34 +1300
committerTakashi Iwai <tiwai@suse.de>2011-12-22 08:12:58 +0100
commitd4b06d23ab1c5aefbb1377fb01939b555236f57f (patch)
tree0cfc94913edab14208d2f9e91bb957146fd8f72f /sound/pci/asihpi
parentc382a5da5cda3e0d8a8f2e8809460285d0a7c1cb (diff)
ALSA: asihpi - Volumes and meters may have 1 or 2 channels.
The channel count can be queried to determine which. Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/asihpi')
-rw-r--r--sound/pci/asihpi/asihpi.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index 44e6ef3e99c..6e89e5b83a4 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -1410,6 +1410,7 @@ static int snd_asihpi_volume_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
u32 h_control = kcontrol->private_value;
+ u32 count;
u16 err;
/* native gains are in millibels */
short min_gain_mB;
@@ -1424,8 +1425,12 @@ static int snd_asihpi_volume_info(struct snd_kcontrol *kcontrol,
step_gain_mB = VOL_STEP_mB;
}
+ err = hpi_meter_query_channels(h_control, &count);
+ if (err)
+ count = HPI_MAX_CHANNELS;
+
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = 2;
+ uinfo->count = count;
uinfo->value.integer.min = min_gain_mB / VOL_STEP_mB;
uinfo->value.integer.max = max_gain_mB / VOL_STEP_mB;
uinfo->value.integer.step = step_gain_mB / VOL_STEP_mB;
@@ -2033,8 +2038,15 @@ static int __devinit snd_asihpi_tuner_add(struct snd_card_asihpi *asihpi,
static int snd_asihpi_meter_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
+ u32 h_control = kcontrol->private_value;
+ u32 count;
+ u16 err;
+ err = hpi_meter_query_channels(h_control, &count);
+ if (err)
+ count = HPI_MAX_CHANNELS;
+
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = HPI_MAX_CHANNELS;
+ uinfo->count = count;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 0x7FFFFFFF;
return 0;