[alsa-devel] [PATCH 3/3] ALSA: oxygen: add support for disabling period irq
Clemens Ladisch
clemens at ladisch.de
Mon May 17 11:15:16 CEST 2010
Signed-off-by: Clemens Ladisch <clemens at ladisch.de>
--- a/sound/pci/oxygen/oxygen_pcm.c
+++ b/sound/pci/oxygen/oxygen_pcm.c
@@ -39,7 +39,8 @@ static const struct snd_pcm_hardware oxy
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
- SNDRV_PCM_INFO_SYNC_START,
+ SNDRV_PCM_INFO_SYNC_START |
+ SNDRV_PCM_INFO_NO_PERIOD_IRQ,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_32000 |
@@ -65,7 +66,8 @@ static const struct snd_pcm_hardware oxy
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
- SNDRV_PCM_INFO_SYNC_START,
+ SNDRV_PCM_INFO_SYNC_START |
+ SNDRV_PCM_INFO_NO_PERIOD_IRQ,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_32000 |
@@ -91,7 +93,8 @@ static const struct snd_pcm_hardware oxy
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
- SNDRV_PCM_INFO_SYNC_START,
+ SNDRV_PCM_INFO_SYNC_START |
+ SNDRV_PCM_INFO_NO_PERIOD_IRQ,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
@@ -530,7 +533,10 @@ static int oxygen_prepare(struct snd_pcm
oxygen_set_bits8(chip, OXYGEN_DMA_FLUSH, channel_mask);
oxygen_clear_bits8(chip, OXYGEN_DMA_FLUSH, channel_mask);
- chip->interrupt_mask |= channel_mask;
+ if (substream->runtime->no_period_irq)
+ chip->interrupt_mask &= ~channel_mask;
+ else
+ chip->interrupt_mask |= channel_mask;
oxygen_write16(chip, OXYGEN_INTERRUPT_MASK, chip->interrupt_mask);
spin_unlock_irq(&chip->reg_lock);
return 0;
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