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authorEliot Blennerhassett <eblennerhassett@audioscience.com>2011-12-22 13:38:33 +1300
committerTakashi Iwai <tiwai@suse.de>2011-12-22 08:12:58 +0100
commitc382a5da5cda3e0d8a8f2e8809460285d0a7c1cb (patch)
treefbfb3208ad1b616d9103330237117bd52c85f91e /sound/pci/asihpi
parent40818b6242513676c8adf30811fb7877b02005fb (diff)
ALSA: asihpi - Low latency mode stream has fixed channel count.
Unlike other streams which support 1..max channels, 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.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index 1ba50e36929..44e6ef3e99c 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -135,6 +135,8 @@ struct snd_card_asihpi {
u16 update_interval_frames;
u16 in_max_chans;
u16 out_max_chans;
+ u16 in_min_chans;
+ u16 out_min_chans;
};
/* Per stream data */
@@ -968,8 +970,6 @@ static void snd_card_asihpi_playback_format(struct snd_card_asihpi *asihpi,
}
static struct snd_pcm_hardware snd_card_asihpi_playback = {
- .channels_min = 1,
- .channels_max = 2,
.buffer_bytes_max = BUFFER_BYTES_MAX,
.period_bytes_min = PERIOD_BYTES_MIN,
.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN,
@@ -1013,6 +1013,7 @@ static int snd_card_asihpi_playback_open(struct snd_pcm_substream *substream)
runtime->private_free = snd_card_asihpi_runtime_free;
snd_card_asihpi_playback.channels_max = card->out_max_chans;
+ snd_card_asihpi_playback.channels_min = card->out_min_chans;
/*?snd_card_asihpi_playback.period_bytes_min =
card->out_max_chans * 4096; */
@@ -1150,8 +1151,6 @@ static void snd_card_asihpi_capture_format(struct snd_card_asihpi *asihpi,
static struct snd_pcm_hardware snd_card_asihpi_capture = {
- .channels_min = 1,
- .channels_max = 2,
.buffer_bytes_max = BUFFER_BYTES_MAX,
.period_bytes_min = PERIOD_BYTES_MIN,
.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN,
@@ -1193,6 +1192,7 @@ static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream)
runtime->private_free = snd_card_asihpi_runtime_free;
snd_card_asihpi_capture.channels_max = card->in_max_chans;
+ snd_card_asihpi_capture.channels_min = card->in_min_chans;
snd_card_asihpi_capture_format(card, dpcm->h_stream,
&snd_card_asihpi_capture);
snd_card_asihpi_pcm_samplerates(card, &snd_card_asihpi_capture);
@@ -2883,6 +2883,15 @@ static int __devinit snd_asihpi_probe(struct pci_dev *pci_dev,
asihpi->out_max_chans = 2;
}
+ if (asihpi->out_max_chans > 2) { /* assume LL mode */
+ asihpi->out_min_chans = asihpi->out_max_chans;
+ asihpi->in_min_chans = asihpi->in_max_chans;
+ asihpi->support_grouping = 0;
+ } else {
+ asihpi->out_min_chans = 1;
+ asihpi->in_min_chans = 1;
+ }
+
snd_printk(KERN_INFO "has dma:%d, grouping:%d, mrx:%d\n",
asihpi->can_dma,
asihpi->support_grouping,