diff options
| author |   Russell King <rmk+kernel@arm.linux.org.uk> | 2014-06-26 15:23:20 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@linaro.org> | 2014-06-28 13:18:46 +0100 |
| commit | 920ec4e595faf89f7db022a068a4729a4d2c48ae (patch) | |
| tree | f82ac9e0ac61eac897e602779cad88c90a41b0f9 /sound/soc/kirkwood/kirkwood-dma.c | |
| parent | ASoC: kirkwood: allow smaller audio periods and smaller number of periods (diff) | |
| download | linux-dev-920ec4e595faf89f7db022a068a4729a4d2c48ae.tar.xz linux-dev-920ec4e595faf89f7db022a068a4729a4d2c48ae.zip | |
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.c | 11 |
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, |