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ASoC: dmaengine_pcm: export soc_component_to_pcm 

In DPCM case, Front-End needs to get the dma chan which has
been requested by Back-End and reuse it.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/429c6ae1f3c5b47eb893f475d531d71cdcfe34c0.1591947428.git.shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shengjiu Wang 2020-06-12 15:37:49 +08:00 committed by Mark Brown
parent 6fbea6b6a8
commit a9a21e1eaf
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 11 additions and 12 deletions
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11
include/sound/dmaengine_pcm.h
View File

@ -161,4 +161,15 @@ int snd_dmaengine_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
#define SND_DMAENGINE_PCM_DRV_NAME "snd_dmaengine_pcm"
struct dmaengine_pcm {
struct dma_chan *chan[SNDRV_PCM_STREAM_LAST + 1];
const struct snd_dmaengine_pcm_config *config;
struct snd_soc_component component;
unsigned int flags;
};
static inline struct dmaengine_pcm *soc_component_to_pcm(struct snd_soc_component *p)
{
return container_of(p, struct dmaengine_pcm, component);
}
#endif

12
sound/soc/soc-generic-dmaengine-pcm.c
View File

@ -21,18 +21,6 @@
*/
#define SND_DMAENGINE_PCM_FLAG_NO_RESIDUE BIT(31)
struct dmaengine_pcm {
struct dma_chan *chan[SNDRV_PCM_STREAM_LAST + 1];
const struct snd_dmaengine_pcm_config *config;
struct snd_soc_component component;
unsigned int flags;
};
static struct dmaengine_pcm *soc_component_to_pcm(struct snd_soc_component *p)
{
return container_of(p, struct dmaengine_pcm, component);
}
static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,
struct snd_pcm_substream *substream)
{