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ASoC: soc-pcm: add option to start DMA after DAI 

Add option to start DMA component after DAI trigger. This is done
by filling the new struct snd_soc_component_driver::start_dma_last.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230228110145.3770525-2-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Claudiu Beznea 2023-02-28 13:01:43 +02:00 committed by Mark Brown
parent fb1847cc46
commit 54fc4b72b6
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 24 additions and 5 deletions
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2
include/sound/soc-component.h
View File

@ -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

27
sound/soc/soc-pcm.c
View File

@ -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 last? */
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_dai_trigger(substream, cmd, 0);
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);
}
start_err:
if (ret < 0)
rollback = 1;