[PATCH 06/20] ASoC/soundwire: intel: pass hdac_bus pointer for link management

[Bard Liao]

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

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@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
 drivers/soundwire/intel.h           | 4 ++++
 drivers/soundwire/intel_init.c      | 2 ++
 include/linux/soundwire/sdw_intel.h | 4 ++++
 sound/soc/sof/intel/hda.c           | 1 +
 4 files changed, 11 insertions(+)

diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 1b23292bb8be..cf9db4906de4 100644
--- a/drivers/soundwire/intel.h
+++ b/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 {
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 43d339c6bcee..c918d2b81cc3 100644
--- a/drivers/soundwire/intel_init.c
+++ b/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) {
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 88eb5bf98140..c4281aa06e2e 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/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;
 };
 
 /*
diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index db103524be4f..22eba57bb3e6 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -229,6 +229,7 @@ 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,
-- 
2.25.1