ALSA: oxygen: set fifo

Takashi Iwai

2014-09-22 07:02:12 UTC

At Sun, 21 Sep 2014 22:52:46 +0200,

Post by Clemens Ladisch
Allow the driver to report the hardware FIFO size.

Applied, thanks.

Takashi

Post by Clemens Ladisch
---
sound/pci/oxygen/oxygen_pcm.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/sound/pci/oxygen/oxygen_pcm.c b/sound/pci/oxygen/oxygen_pcm.c
index cc0bcd9..0282824 100644
--- a/sound/pci/oxygen/oxygen_pcm.c
+++ b/sound/pci/oxygen/oxygen_pcm.c
@@ -29,6 +29,9 @@
/* the multichannel DMA channel has a 24-bit counter */
#define BUFFER_BYTES_MAX_MULTICH ((1 << 24) * 4)
+#define FIFO_BYTES 256
+#define FIFO_BYTES_MULTICH 1024
+
#define PERIOD_BYTES_MIN 64
#define DEFAULT_BUFFER_BYTES (BUFFER_BYTES_MAX / 2)
@@ -60,6 +63,7 @@ static const struct snd_pcm_hardware oxygen_stereo_hardware = {
.period_bytes_max = BUFFER_BYTES_MAX,
.periods_min = 1,
.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN,
+ .fifo_size = FIFO_BYTES,
};
static const struct snd_pcm_hardware oxygen_multichannel_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
@@ -87,6 +91,7 @@ static const struct snd_pcm_hardware oxygen_multichannel_hardware = {
.period_bytes_max = BUFFER_BYTES_MAX_MULTICH,
.periods_min = 1,
.periods_max = BUFFER_BYTES_MAX_MULTICH / PERIOD_BYTES_MIN,
+ .fifo_size = FIFO_BYTES_MULTICH,
};
static const struct snd_pcm_hardware oxygen_ac97_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
@@ -106,6 +111,7 @@ static const struct snd_pcm_hardware oxygen_ac97_hardware = {
.period_bytes_max = BUFFER_BYTES_MAX,
.periods_min = 1,
.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN,
+ .fifo_size = FIFO_BYTES,
};
static const struct snd_pcm_hardware *const oxygen_hardware[PCM_COUNT] = {
@@ -141,6 +147,10 @@ static int oxygen_open(struct snd_pcm_substream *substream,
runtime->hw.rates &= ~(SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_64000);
runtime->hw.rate_min = 44100;
+ /* fall through */
+ runtime->hw.fifo_size = 0;
break;
runtime->hw.channels_max = chip->model.dac_channels_pcm;