Merge tag 'soundwire-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire

Pull soundwire updates from Vinod Koul:
 "This includes DT support thanks to Srini and more work done by Intel
  (Pierre) on improving cadence and intel support.

  Summary:

   - Add DT bindings and DT support in core

   - Add debugfs support for soundwire properties

   - Improvements on streaming handling to core

   - Improved handling of Cadence module

   - More updates and improvements to Intel driver"

* tag 'soundwire-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire: (30 commits)
  soundwire: stream: make stream name a const pointer
  soundwire: Add compute_params callback
  soundwire: core: add device tree support for slave devices
  dt-bindings: soundwire: add slave bindings
  soundwire: bus: set initial value to port_status
  soundwire: intel: handle disabled links
  soundwire: intel: add debugfs register dump
  soundwire: cadence_master: add debugfs register dump
  soundwire: add debugfs support
  soundwire: intel: remove unused variables
  soundwire: intel: move shutdown() callback and don't export symbol
  soundwire: cadence_master: add kernel parameter to override interrupt mask
  soundwire: intel_init: add kernel module parameter to filter out links
  soundwire: cadence_master: fix divider setting in clock register
  soundwire: cadence_master: make use of mclk_freq property
  soundwire: intel: read mclk_freq property from firmware
  soundwire: add new mclk_freq field for properties
  soundwire: stream: remove unnecessary variable initializations
  soundwire: stream: fix disable sequence
  soundwire: include mod_devicetable.h to avoid compiling warnings
  ...

include/linux/soundwire/sdw.h

@@ -4,6 +4,8 @@
 #ifndef __SOUNDWIRE_H
 #define __SOUNDWIRE_H
 
+#include <linux/mod_devicetable.h>
+
 struct sdw_bus;
 struct sdw_slave;
 
@@ -377,6 +379,8 @@ struct sdw_slave_prop {
  * @dynamic_frame: Dynamic frame shape supported
  * @err_threshold: Number of times that software may retry sending a single
  * command
+ * @mclk_freq: clock reference passed to SoundWire Master, in Hz.
+ * @hw_disabled: if true, the Master is not functional, typically due to pin-mux
  */
 struct sdw_master_prop {
 	u32 revision;
@@ -391,6 +395,8 @@ struct sdw_master_prop {
 	u32 default_col;
 	bool dynamic_frame;
 	u32 err_threshold;
+	u32 mclk_freq;
+	bool hw_disabled;
 };
 
 int sdw_master_read_prop(struct sdw_bus *bus);
@@ -538,6 +544,7 @@ struct sdw_slave_ops {
  * @bus: Bus handle
  * @ops: Slave callback ops
  * @prop: Slave properties
+ * @debugfs: Slave debugfs
  * @node: node for bus list
  * @port_ready: Port ready completion flag for each Slave port
  * @dev_num: Device Number assigned by Bus
@@ -549,6 +556,9 @@ struct sdw_slave {
 	struct sdw_bus *bus;
 	const struct sdw_slave_ops *ops;
 	struct sdw_slave_prop prop;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs;
+#endif
 	struct list_head node;
 	struct completion *port_ready;
 	u16 dev_num;
@@ -718,6 +728,7 @@ struct sdw_master_ops {
  * Bit set implies used number, bit clear implies unused number.
  * @bus_lock: bus lock
  * @msg_lock: message lock
+ * @compute_params: points to Bus resource management implementation
  * @ops: Master callback ops
  * @port_ops: Master port callback ops
  * @params: Current bus parameters
@@ -725,6 +736,7 @@ struct sdw_master_ops {
  * @m_rt_list: List of Master instance of all stream(s) running on Bus. This
  * is used to compute and program bus bandwidth, clock, frame shape,
  * transport and port parameters
+ * @debugfs: Bus debugfs
  * @defer_msg: Defer message
  * @clk_stop_timeout: Clock stop timeout computed
  * @bank_switch_timeout: Bank switch timeout computed
@@ -739,11 +751,15 @@ struct sdw_bus {
 	DECLARE_BITMAP(assigned, SDW_MAX_DEVICES);
 	struct mutex bus_lock;
 	struct mutex msg_lock;
+	int (*compute_params)(struct sdw_bus *bus);
 	const struct sdw_master_ops *ops;
 	const struct sdw_master_port_ops *port_ops;
 	struct sdw_bus_params params;
 	struct sdw_master_prop prop;
 	struct list_head m_rt_list;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *debugfs;
+#endif
 	struct sdw_defer defer_msg;
 	unsigned int clk_stop_timeout;
 	u32 bank_switch_timeout;
@@ -828,7 +844,7 @@ struct sdw_stream_params {
  * @m_rt_count: Count of Master runtime(s) in this stream
  */
 struct sdw_stream_runtime {
-	char *name;
+	const char *name;
 	struct sdw_stream_params params;
 	enum sdw_stream_state state;
 	enum sdw_stream_type type;
@@ -836,7 +852,7 @@ struct sdw_stream_runtime {
 	int m_rt_count;
 };
 
-struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name);
+struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name);
 void sdw_release_stream(struct sdw_stream_runtime *stream);
 int sdw_stream_add_master(struct sdw_bus *bus,
 		struct sdw_stream_config *stream_config,

include/linux/soundwire/sdw_intel.h

@@ -8,6 +8,7 @@
  * struct sdw_intel_ops: Intel audio driver callback ops
  *
  * @config_stream: configure the stream with the hw_params
+ * the first argument containing the context is mandatory
  */
 struct sdw_intel_ops {
 	int (*config_stream)(void *arg, void *substream,