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| author |   Olivier Moysan <olivier.moysan@st.com> | 2018-02-19 16:00:36 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2018-02-26 11:11:20 +0000 |
| commit | 78648092ef46255e6dc6685202164199c86cf930 (patch) | |
| tree | f226b44417b9638854052f6fb75b74d99e6ea9c9 /include/sound | |
| parent | ASoC: soc-generic-dmaengine-pcm: Fix sparse warnings (diff) | |
| download | linux-dev-78648092ef46255e6dc6685202164199c86cf930.tar.xz linux-dev-78648092ef46255e6dc6685202164199c86cf930.zip | |
ASoC: dmaengine_pcm: add processing support
Allow dmaengine client to optionally register a processing callback.
This callback is intended to apply processing
on samples in buffer copied from/to user space, before/after DMA transfer.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/dmaengine_pcm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index 8a5a8404966e..47ef486852ed 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -140,6 +140,9 @@ struct snd_dmaengine_pcm_config { struct dma_chan *(*compat_request_channel)( struct snd_soc_pcm_runtime *rtd, struct snd_pcm_substream *substream); + int (*process)(struct snd_pcm_substream *substream, + int channel, unsigned long hwoff, + void *buf, unsigned long bytes); dma_filter_fn compat_filter_fn; struct device *dma_dev; const char *chan_names[SNDRV_PCM_STREAM_LAST + 1]; |