From c382a5da5cda3e0d8a8f2e8809460285d0a7c1cb Mon Sep 17 00:00:00 2001 From: Eliot Blennerhassett Date: Thu, 22 Dec 2011 13:38:33 +1300 Subject: [PATCH] ALSA: asihpi - Low latency mode stream has fixed channel count. Unlike other streams which support 1..max channels, Signed-off-by: Eliot Blennerhassett Signed-off-by: Takashi Iwai --- sound/pci/asihpi/asihpi.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c index 1ba50e369296..44e6ef3e99cc 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, -- GitLab