Commit 54fc4b72 authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Mark Brown

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: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230228110145.3770525-2-claudiu.beznea@microchip.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent fb1847cc
......@@ -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
......
......@@ -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;
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);
}
start_err:
if (ret < 0)
rollback = 1;
......
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