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

Bard Liao
2023-03-23T05:31:08Z

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>
---
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