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Subject[PATCH v2 1/2] soundwire: Intel: add trigger callback
Date
When a pipeline is split into FE and BE parts, the BE pipeline may need to
be triggered separately in the BE trigger op. So add the trigger callback
in the link_res ops that will be invoked during BE DAI trigger.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
---
drivers/soundwire/intel.c | 8 ++++++++
include/linux/soundwire/sdw_intel.h | 1 +
2 files changed, 9 insertions(+)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 505c5ef061e3..2e7c27d303b4 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1004,9 +1004,17 @@ static int intel_trigger(struct snd_pcm_substream *substream, int cmd, struct sn
{
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
struct sdw_intel *sdw = cdns_to_intel(cdns);
+ struct sdw_intel_link_res *res = sdw->link_res;
struct sdw_cdns_dma_data *dma;
int ret = 0;

+ /* The .trigger callback is used to send required IPC to audio
+ * firmware. The .free_stream callback will still be called
+ * by intel_free_stream() in the TRIGGER_SUSPEND case.
+ */
+ if (res->ops && res->ops->trigger)
+ res->ops->trigger(dai, cmd, substream->stream);
+
dma = snd_soc_dai_get_dma_data(dai, substream);
if (!dma) {
dev_err(dai->dev, "failed to get dma data in %s\n",
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index b5b489ea1aef..ec16ae49e6a4 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -121,6 +121,7 @@ struct sdw_intel_ops {
struct sdw_intel_stream_params_data *params_data);
int (*free_stream)(struct device *dev,
struct sdw_intel_stream_free_data *free_data);
+ int (*trigger)(struct snd_soc_dai *dai, int cmd, int stream);
};

/**
--
2.17.1
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