Add option to start DMA component after DAI trigger. This is done by filling the new struct snd_dmaengine_pcm_config::start_dma_last.
Signed-off-by: Claudiu Beznea claudiu.beznea@microchip.com --- include/sound/dmaengine_pcm.h | 1 + include/sound/soc-component.h | 2 ++ sound/soc/soc-generic-dmaengine-pcm.c | 8 +++++--- sound/soc/soc-pcm.c | 27 ++++++++++++++++++++++----- 4 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index 2df54cf02cb3..4e3dcb94576d 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -149,6 +149,7 @@ struct snd_dmaengine_pcm_config {
const struct snd_pcm_hardware *pcm_hardware; unsigned int prealloc_buffer_size; + unsigned int start_dma_last; };
int snd_dmaengine_pcm_register(struct device *dev, diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h index 3203d35bc8c1..0814ed143864 100644 --- a/include/sound/soc-component.h +++ b/include/sound/soc-component.h @@ -190,6 +190,8 @@ struct snd_soc_component_driver { bool use_dai_pcm_id; /* use DAI link PCM ID as PCM device number */ int be_pcm_base; /* base device ID for all BE PCMs */
+ unsigned int start_dma_last; + #ifdef CONFIG_DEBUG_FS const char *debugfs_prefix; #endif diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c index 3b99f619e37e..264e87af6b58 100644 --- a/sound/soc/soc-generic-dmaengine-pcm.c +++ b/sound/soc/soc-generic-dmaengine-pcm.c @@ -318,7 +318,7 @@ static int dmaengine_copy_user(struct snd_soc_component *component, return 0; }
-static const struct snd_soc_component_driver dmaengine_pcm_component = { +static struct snd_soc_component_driver dmaengine_pcm_component = { .name = SND_DMAENGINE_PCM_DRV_NAME, .probe_order = SND_SOC_COMP_ORDER_LATE, .open = dmaengine_pcm_open, @@ -329,7 +329,7 @@ static const struct snd_soc_component_driver dmaengine_pcm_component = { .pcm_construct = dmaengine_pcm_new, };
-static const struct snd_soc_component_driver dmaengine_pcm_component_process = { +static struct snd_soc_component_driver dmaengine_pcm_component_process = { .name = SND_DMAENGINE_PCM_DRV_NAME, .probe_order = SND_SOC_COMP_ORDER_LATE, .open = dmaengine_pcm_open, @@ -425,7 +425,7 @@ static const struct snd_dmaengine_pcm_config snd_dmaengine_pcm_default_config = int snd_dmaengine_pcm_register(struct device *dev, const struct snd_dmaengine_pcm_config *config, unsigned int flags) { - const struct snd_soc_component_driver *driver; + struct snd_soc_component_driver *driver; struct dmaengine_pcm *pcm; int ret;
@@ -450,6 +450,8 @@ int snd_dmaengine_pcm_register(struct device *dev, else driver = &dmaengine_pcm_component;
+ driver->start_dma_last = config->start_dma_last; + ret = snd_soc_component_initialize(&pcm->component, driver, dev); if (ret) goto err_free_dma; diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 005b179a770a..ec429b93a4ee 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1088,22 +1088,39 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream, static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); - int ret = -EINVAL, _ret = 0; + struct snd_soc_component *component; + int ret = -EINVAL, _ret = 0, start_dma_last = 0, i; int rollback = 0;
switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + /* Do we need to start dma first? */ + for_each_rtd_components(rtd, i, component) { + if (component->driver->start_dma_last) { + start_dma_last = 1; + break; + } + } + ret = snd_soc_link_trigger(substream, cmd, 0); if (ret < 0) goto start_err;
- ret = snd_soc_pcm_component_trigger(substream, cmd, 0); - if (ret < 0) - goto start_err; + if (start_dma_last) { + ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); + if (ret < 0) + goto start_err; + + ret = snd_soc_pcm_component_trigger(substream, cmd, 0); + } else { + ret = snd_soc_pcm_component_trigger(substream, cmd, 0); + if (ret < 0) + goto start_err;
- ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); + ret = snd_soc_pcm_dai_trigger(substream, cmd, 0); + } start_err: if (ret < 0) rollback = 1;