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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-06-26 15:23:20 +0100
committerMark Brown <broonie@linaro.org>2014-06-28 13:18:46 +0100
commit920ec4e595faf89f7db022a068a4729a4d2c48ae (patch)
treef82ac9e0ac61eac897e602779cad88c90a41b0f9 /sound/soc/kirkwood/kirkwood-dma.c
parenta622251c01b628cbbd1b02a877a6469303ec2b58 (diff)
ASoC: kirkwood: implement NO_PERIOD_WAKEUP support
Permit ALSA to run without hardware interrupts from the audio interface. Instead, ALSA will use a kernel timer to decide when to check the buffer state, resulting in a lighter workload for the CPU. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/kirkwood/kirkwood-dma.c')
-rw-r--r--sound/soc/kirkwood/kirkwood-dma.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/sound/soc/kirkwood/kirkwood-dma.c b/sound/soc/kirkwood/kirkwood-dma.c
index aac22fccdcdc..4cf2245950d7 100644
--- a/sound/soc/kirkwood/kirkwood-dma.c
+++ b/sound/soc/kirkwood/kirkwood-dma.c
@@ -28,11 +28,12 @@ static struct kirkwood_dma_data *kirkwood_priv(struct snd_pcm_substream *subs)
}
static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
- .info = (SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_PAUSE),
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
.buffer_bytes_max = KIRKWOOD_SND_MAX_BUFFER_BYTES,
.period_bytes_min = KIRKWOOD_SND_MIN_PERIOD_BYTES,
.period_bytes_max = KIRKWOOD_SND_MAX_PERIOD_BYTES,