[PATCH v2 04/16] soundwire: stream: extend sdw_alloc_stream() to take 'type' parameter

[Bard Liao <yung-chuan.liao@linux.intel.com>]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>

In the existing definition of sdw_stream_runtime, the 'type' member is
never set and defaults to PCM. To prepare for the BPT/BRA support, we
need to special-case streams and make use of the 'type'.

No functional change for now, the implicit PCM type is now explicit.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
---
 Documentation/driver-api/soundwire/stream.rst | 2 +-
 drivers/soundwire/stream.c                    | 6 ++++--
 include/linux/soundwire/sdw.h                 | 2 +-
 sound/soc/qcom/sdw.c                          | 2 +-
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/driver-api/soundwire/stream.rst b/Documentation/driver-api/soundwire/stream.rst
index 2a794484f62c..d66201299633 100644
--- a/Documentation/driver-api/soundwire/stream.rst
+++ b/Documentation/driver-api/soundwire/stream.rst
@@ -291,7 +291,7 @@ per stream. From ASoC DPCM framework, this stream state maybe linked to
 
 .. code-block:: c
 
-  int sdw_alloc_stream(char * stream_name);
+  int sdw_alloc_stream(char * stream_name, enum sdw_stream_type type);
 
 The SoundWire core provides a sdw_startup_stream() helper function,
 typically called during a dailink .startup() callback, which performs
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index dd8de88d8b46..ae6d1c767ab9 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1806,12 +1806,13 @@ static int set_stream(struct snd_pcm_substream *substream,
  * sdw_alloc_stream() - Allocate and return stream runtime
  *
  * @stream_name: SoundWire stream name
+ * @type: stream type (could be PCM ,PDM or BPT)
  *
  * Allocates a SoundWire stream runtime instance.
  * sdw_alloc_stream should be called only once per stream. Typically
  * invoked from ALSA/ASoC machine/platform driver.
  */
-struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name)
+struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name, enum sdw_stream_type type)
 {
 	struct sdw_stream_runtime *stream;
 
@@ -1823,6 +1824,7 @@ struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name)
 	INIT_LIST_HEAD(&stream->master_list);
 	stream->state = SDW_STREAM_ALLOCATED;
 	stream->m_rt_count = 0;
+	stream->type = type;
 
 	return stream;
 }
@@ -1851,7 +1853,7 @@ int sdw_startup_stream(void *sdw_substream)
 	if (!name)
 		return -ENOMEM;
 
-	sdw_stream = sdw_alloc_stream(name);
+	sdw_stream = sdw_alloc_stream(name, SDW_STREAM_PCM);
 	if (!sdw_stream) {
 		dev_err(rtd->dev, "alloc stream failed for substream DAI %s\n", substream->name);
 		ret = -ENOMEM;
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 857b670eb9a5..ba58e2a52322 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -1019,7 +1019,7 @@ struct sdw_bus {
 	unsigned int lane_used_bandwidth[SDW_MAX_LANES];
 };
 
-struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name);
+struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name, enum sdw_stream_type type);
 void sdw_release_stream(struct sdw_stream_runtime *stream);
 
 int sdw_compute_params(struct sdw_bus *bus, struct sdw_stream_runtime *stream);
diff --git a/sound/soc/qcom/sdw.c b/sound/soc/qcom/sdw.c
index f2eda2ff46c0..875da4adb1d7 100644
--- a/sound/soc/qcom/sdw.c
+++ b/sound/soc/qcom/sdw.c
@@ -27,7 +27,7 @@ int qcom_snd_sdw_startup(struct snd_pcm_substream *substream)
 	struct snd_soc_dai *codec_dai;
 	int ret, i;
 
-	sruntime = sdw_alloc_stream(cpu_dai->name);
+	sruntime = sdw_alloc_stream(cpu_dai->name, SDW_STREAM_PCM);
 	if (!sruntime)
 		return -ENOMEM;
 
-- 
2.43.0