ASoC/soundwire: intel: pass hdac_bus pointer for link management

The hdac_bus pointer is used to access the extended link information
and handle power management. Pass it from the SOF driver down to the
auxiliary devices.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230515071042.2038-7-yung-chuan.liao@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/intel.h

@@ -4,6 +4,8 @@
 #ifndef __SDW_INTEL_LOCAL_H
 #define __SDW_INTEL_LOCAL_H
 
+struct hdac_bus;
+
 /**
  * struct sdw_intel_link_res - Soundwire Intel link resource structure,
  * typically populated by the controller driver.
@@ -23,6 +25,7 @@
  * @link_mask: global mask needed for power-up/down sequences
  * @cdns: Cadence master descriptor
  * @list: used to walk-through all masters exposed by the same controller
+ * @hbus: hdac_bus pointer, needed for power management
  */
 struct sdw_intel_link_res {
 	const struct sdw_intel_hw_ops *hw_ops;
@@ -42,6 +45,7 @@ struct sdw_intel_link_res {
 	u32 link_mask;
 	struct sdw_cdns *cdns;
 	struct list_head list;
+	struct hdac_bus *hbus;
 };
 
 struct sdw_intel {

drivers/soundwire/intel_init.c

@@ -84,6 +84,8 @@ static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *
 	link->shim_mask = &ctx->shim_mask;
 	link->link_mask = ctx->link_mask;
 
+	link->hbus = res->hbus;
+
 	/* now follow the two-step init/add sequence */
 	ret = auxiliary_device_init(auxdev);
 	if (ret < 0) {

include/linux/soundwire/sdw_intel.h

@@ -269,6 +269,8 @@ struct sdw_intel_slave_id {
 	struct sdw_slave_id id;
 };
 
+struct hdac_bus;
+
 /**
  * struct sdw_intel_ctx - context allocated by the controller
  * driver probe
@@ -324,6 +326,7 @@ struct sdw_intel_ctx {
  * @shim_base: sdw shim base.
  * @alh_base: sdw alh base.
  * @ext: extended HDaudio link support
+ * @hbus: hdac_bus pointer, needed for power management
  */
 struct sdw_intel_res {
 	const struct sdw_intel_hw_ops *hw_ops;
@@ -339,6 +342,7 @@ struct sdw_intel_res {
 	u32 shim_base;
 	u32 alh_base;
 	bool ext;
+	struct hdac_bus *hbus;
 };
 
 /*

sound/soc/sof/intel/hda.c

@@ -189,6 +189,7 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
 	res.ops = &sdw_callback;
 	res.dev = sdev->dev;
 	res.clock_stop_quirks = sdw_clock_stop_quirks;
+	res.hbus = sof_to_bus(sdev);
 
 	/*
 	 * ops and arg fields are not populated for now,