[PATCH 3/7] soundwire: intel: Split PDIs and DAIs initialization

[Cezary Rojewski <cezary.rojewski@intel.com>]

Not every client of the soundwire-driver needs the secondary
soc-component and full range of DAIs immediately when initializing the
device. As function intel_register_dai() does all of that on top of
initializing PDIs, split it into two logical blocks to accommodate for
both approaches. In consequence, register_dai() callback becomes
optional.

To keep things in status quo for existing users, update
intel_link_startup() to call sdw_intel_init_pdis().

Cc: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 drivers/soundwire/intel.c           | 24 +++++++++++++++---------
 drivers/soundwire/intel.h           |  3 ++-
 drivers/soundwire/intel_auxdevice.c |  4 ++++
 3 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index d53fa3d299bc..708503373183 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1027,23 +1027,29 @@ static int intel_create_dai(struct sdw_cdns *cdns,
 	return 0;
 }
 
+int sdw_intel_init_pdis(struct sdw_intel *sdw)
+{
+	struct sdw_cdns_stream_config config;
+	int ret;
+
+	/* Read the PDI config and initialize cadence PDI */
+	intel_pdi_init(sdw, &config);
+	ret = sdw_cdns_pdi_init(&sdw->cdns, config);
+	if (ret)
+		return ret;
+
+	intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm);
+	return 0;
+}
+
 static int intel_register_dai(struct sdw_intel *sdw)
 {
 	struct sdw_cdns_dai_runtime **dai_runtime_array;
-	struct sdw_cdns_stream_config config;
 	struct sdw_cdns *cdns = &sdw->cdns;
 	struct sdw_cdns_streams *stream;
 	struct snd_soc_dai_driver *dais;
 	int num_dai, ret, off = 0;
 
-	/* Read the PDI config and initialize cadence PDI */
-	intel_pdi_init(sdw, &config);
-	ret = sdw_cdns_pdi_init(cdns, config);
-	if (ret)
-		return ret;
-
-	intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm);
-
 	/* DAIs are created based on total number of PDIs supported */
 	num_dai = cdns->pcm.num_pdi;
 
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 7a2e7e73ad63..12416cef8224 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -158,7 +158,7 @@ static inline int sdw_intel_register_dai(struct sdw_intel *sdw)
 {
 	if (SDW_INTEL_CHECK_OPS(sdw, register_dai))
 		return SDW_INTEL_OPS(sdw, register_dai)(sdw);
-	return -ENOTSUPP;
+	return 0;
 }
 
 static inline void sdw_intel_check_clock_stop(struct sdw_intel *sdw)
@@ -262,6 +262,7 @@ int intel_start_bus_after_reset(struct sdw_intel *sdw);
 void intel_check_clock_stop(struct sdw_intel *sdw);
 int intel_start_bus_after_clock_stop(struct sdw_intel *sdw);
 int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop, bool wake_enable);
+int sdw_intel_init_pdis(struct sdw_intel *sdw);
 
 /* common bank switch routines */
 int intel_pre_bank_switch(struct sdw_intel *sdw);
diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c
index 5983fbc5725a..114dadedfa14 100644
--- a/drivers/soundwire/intel_auxdevice.c
+++ b/drivers/soundwire/intel_auxdevice.c
@@ -423,6 +423,10 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	if (ret)
 		goto err_init;
 
+	ret = sdw_intel_init_pdis(sdw);
+	if (ret)
+		goto err_init;
+
 	/* Register DAIs */
 	ret = sdw_intel_register_dai(sdw);
 	if (ret) {
-- 
2.34.1