Add SDCA DAI ops helpers

Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:

First, a couple of minor code fixups to already submitted code. Then
some patches to add new DAI ops helpers for the SDCA stuff, these allow
configuring things like the sample rate and finding out which SoundWire
port should be used for a specific SDCA streaming input/output terminal.
Still a few bits of outstanding work here (propogation of Cluster
information particularly) but his should be good enough to get some
basic use-cases working.

Hopefully we are getting fairly close to completing a first version of
the SDCA work now. Should be one more series to add FDL (firmware
downloading), then we should be able to send a first version of the
actual SDCA class driver itself.

Author: broonie

include/sound/sdca_asoc.h

@@ -11,9 +11,13 @@
 #define __SDCA_ASOC_H__
 
 struct device;
+struct regmap;
 struct sdca_function_data;
 struct snd_kcontrol_new;
+struct snd_pcm_hw_params;
+struct snd_pcm_substream;
 struct snd_soc_component_driver;
+struct snd_soc_dai;
 struct snd_soc_dai_driver;
 struct snd_soc_dai_ops;
 struct snd_soc_dapm_route;
@@ -39,4 +43,19 @@ int sdca_asoc_populate_component(struct device *dev,
 				 struct snd_soc_dai_driver **dai_drv, int *num_dai_drv,
 				 const struct snd_soc_dai_ops *ops);
 
+int sdca_asoc_set_constraints(struct device *dev, struct regmap *regmap,
+			      struct sdca_function_data *function,
+			      struct snd_pcm_substream *substream,
+			      struct snd_soc_dai *dai);
+void sdca_asoc_free_constraints(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai);
+int sdca_asoc_get_port(struct device *dev, struct regmap *regmap,
+		       struct sdca_function_data *function,
+		       struct snd_soc_dai *dai);
+int sdca_asoc_hw_params(struct device *dev, struct regmap *regmap,
+			struct sdca_function_data *function,
+			struct snd_pcm_substream *substream,
+			struct snd_pcm_hw_params *params,
+			struct snd_soc_dai *dai);
+
 #endif // __SDCA_ASOC_H__

include/sound/sdca_function.h

@@ -185,6 +185,14 @@ enum sdca_usage_range {
 	SDCA_USAGE_NCOLS				= 7,
 };
 
+/**
+ * enum sdca_dataport_selector_range - Column definitions for DataPort_Selector
+ */
+enum sdca_dataport_selector_range {
+	SDCA_DATAPORT_SELECTOR_NCOLS			= 16,
+	SDCA_DATAPORT_SELECTOR_NROWS			= 4,
+};
+
 /**
  * enum sdca_mu_controls - SDCA Controls for Mixer Unit
  *
@@ -1268,6 +1276,15 @@ struct sdca_cluster {
 	struct sdca_channel *channels;
 };
 
+/**
+ * enum sdca_cluster_range - SDCA Range column definitions for ClusterIndex
+ */
+enum sdca_cluster_range {
+	SDCA_CLUSTER_BYTEINDEX				= 0,
+	SDCA_CLUSTER_CLUSTERID				= 1,
+	SDCA_CLUSTER_NCOLS				= 2,
+};
+
 /**
  * struct sdca_function_data - top-level information for one SDCA function
  * @desc: Pointer to short descriptor from initial parsing.
@@ -1316,4 +1333,18 @@ int sdca_parse_function(struct device *dev,
 			struct sdca_function_desc *desc,
 			struct sdca_function_data *function);
 
+struct sdca_control *sdca_selector_find_control(struct device *dev,
+						struct sdca_entity *entity,
+						const int sel);
+struct sdca_control_range *sdca_control_find_range(struct device *dev,
+						   struct sdca_entity *entity,
+						   struct sdca_control *control,
+						   int cols, int rows);
+struct sdca_control_range *sdca_selector_find_range(struct device *dev,
+						    struct sdca_entity *entity,
+						    int sel, int cols, int rows);
+struct sdca_cluster *sdca_id_find_cluster(struct device *dev,
+					  struct sdca_function_data *function,
+					  const int id);
+
 #endif

include/sound/soc-dai.h

@@ -463,6 +463,9 @@ struct snd_soc_dai {
 
 	/* bit field */
 	unsigned int probed:1;
+
+	/* DAI private data */
+	void *priv;
 };
 
 static inline const struct snd_soc_pcm_stream *