soundwire: Intel: add trigger callback

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>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20220708061312.25878-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 0268fa5..fed6418 100644 (file)
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1004,9 +1004,18 @@ 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 b5b489e..ec16ae4 100644 (file)
--- 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);
 };
 
 /**