ALSA: oxygen: set fifo_size

Allow the driver to report the hardware FIFO size.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/oxygen/oxygen_pcm.c b/sound/pci/oxygen/oxygen_pcm.c
index cc0bcd9f335075b341dba57144fca8a44311adb6..02828240ba15740600a65b2eaf07b3f663c3463b 100644 (file)
--- 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 */
+       case PCM_A:
+       case PCM_B:
+               runtime->hw.fifo_size = 0;
                break;
        case PCM_MULTICH:
                runtime->hw.channels_max = chip->model.dac_channels_pcm;