[PATCH 0/7] soundwire: intel: introduce hw_ops and move auxdevice handling to dedicated file

[PATCH 0/7] soundwire: intel: introduce hw_ops and move auxdevice handling to dedicated file

[Bard Liao]

This series adds yet another set of cleanups
a) all the helpers are now exposed as hw_ops callbacks
b) the auxiliary device code is now completely generic.

This will allow for easier introduction of new hw_ops implementations in
the future without throwing away all the goodness of the auxiliary device
handling. Since there will be a tighter coupling with HDaudio, it's likely
that future hw_ops are implemented in the SOF driver directly.

Pierre-Louis Bossart (7):
  soundwire: intel: start using hw_ops
  soundwire: intel: add debugfs callbacks in hw_ops
  soundwire: intel: add register_dai callback in hw_ops
  soundwire: intel: add bus management callbacks in hw_ops
  soundwire: intel: add link power management callbacks in hw_ops
  soundwire: intel: add in-band wake callbacks in hw_ops
  soundwire: intel: split auxdevice to different file

 drivers/soundwire/Makefile          |   2 +-
 drivers/soundwire/intel.c           | 658 +--------------------------
 drivers/soundwire/intel.h           |  96 +++-
 drivers/soundwire/intel_auxdevice.c | 678 ++++++++++++++++++++++++++++
 drivers/soundwire/intel_auxdevice.h |  18 +
 drivers/soundwire/intel_init.c      |   2 +
 include/linux/soundwire/sdw_intel.h |  44 ++
 sound/soc/sof/intel/hda.c           |   2 +
 8 files changed, 853 insertions(+), 647 deletions(-)
 create mode 100644 drivers/soundwire/intel_auxdevice.c
 create mode 100644 drivers/soundwire/intel_auxdevice.h

-- 
2.25.1

[PATCH 1/7] soundwire: intel: start using hw_ops

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Before introducing new hardware with completely different register
spaces and programming sequences, we need to abstract some of the
existing routines in hw_ops that will be platform-specific. For now we
only use the 'cnl' ops - after the first Intel platform with SoundWire
capabilities.

Rather than one big intrusive patch, hw_ops are introduced in this
patch so show the dependencies between drivers. Follow-up patches will
introduce callbacks for debugfs, power and bus management.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c           | 38 +++++++++++++++++++++++------
 drivers/soundwire/intel.h           |  3 +++
 drivers/soundwire/intel_init.c      |  1 +
 include/linux/soundwire/sdw_intel.h | 15 ++++++++++++
 sound/soc/sof/intel/hda.c           |  2 ++
 5 files changed, 51 insertions(+), 8 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index b9cb7e31ddb3..f88319f8ded4 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -745,10 +745,10 @@ static int intel_free_stream(struct sdw_intel *sdw,
  * bank switch routines
  */
 
-static int intel_pre_bank_switch(struct sdw_bus *bus)
+static int intel_pre_bank_switch(struct sdw_intel *sdw)
 {
-	struct sdw_cdns *cdns = bus_to_cdns(bus);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_cdns *cdns = &sdw->cdns;
+	struct sdw_bus *bus = &cdns->bus;
 
 	/* Write to register only for multi-link */
 	if (!bus->multi_link)
@@ -759,10 +759,10 @@ static int intel_pre_bank_switch(struct sdw_bus *bus)
 	return 0;
 }
 
-static int intel_post_bank_switch(struct sdw_bus *bus)
+static int intel_post_bank_switch(struct sdw_intel *sdw)
 {
-	struct sdw_cdns *cdns = bus_to_cdns(bus);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_cdns *cdns = &sdw->cdns;
+	struct sdw_bus *bus = &cdns->bus;
 	void __iomem *shim = sdw->link_res->shim;
 	int sync_reg, ret;
 
@@ -1422,6 +1422,28 @@ static int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
 	return 0;
 }
 
+const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
+	.pre_bank_switch = intel_pre_bank_switch,
+	.post_bank_switch = intel_post_bank_switch,
+};
+EXPORT_SYMBOL_NS(sdw_intel_cnl_hw_ops, SOUNDWIRE_INTEL);
+
+static int generic_pre_bank_switch(struct sdw_bus *bus)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+
+	return sdw->link_res->hw_ops->pre_bank_switch(sdw);
+}
+
+static int generic_post_bank_switch(struct sdw_bus *bus)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+
+	return sdw->link_res->hw_ops->post_bank_switch(sdw);
+}
+
 static int sdw_master_read_intel_prop(struct sdw_bus *bus)
 {
 	struct sdw_master_prop *prop = &bus->prop;
@@ -1477,8 +1499,8 @@ static struct sdw_master_ops sdw_intel_ops = {
 	.xfer_msg_defer = cdns_xfer_msg_defer,
 	.reset_page_addr = cdns_reset_page_addr,
 	.set_bus_conf = cdns_bus_conf,
-	.pre_bank_switch = intel_pre_bank_switch,
-	.post_bank_switch = intel_post_bank_switch,
+	.pre_bank_switch = generic_pre_bank_switch,
+	.post_bank_switch = generic_post_bank_switch,
 	.read_ping_status = cdns_read_ping_status,
 };
 
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index cd93a44dba9a..3170df76b411 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -7,6 +7,7 @@
 /**
  * struct sdw_intel_link_res - Soundwire Intel link resource structure,
  * typically populated by the controller driver.
+ * @hw_ops: platform-specific ops
  * @mmio_base: mmio base of SoundWire registers
  * @registers: Link IO registers base
  * @shim: Audio shim pointer
@@ -22,6 +23,8 @@
  * @list: used to walk-through all masters exposed by the same controller
  */
 struct sdw_intel_link_res {
+	const struct sdw_intel_hw_ops *hw_ops;
+
 	void __iomem *mmio_base; /* not strictly needed, useful for debug */
 	void __iomem *registers;
 	void __iomem *shim;
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index d091513919df..1e6d74b3e773 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -60,6 +60,7 @@ static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *
 
 	/* Add link information used in the driver probe */
 	link = &ldev->link_res;
+	link->hw_ops = res->hw_ops;
 	link->mmio_base = res->mmio_base;
 	link->registers = res->mmio_base + SDW_LINK_BASE
 		+ (SDW_LINK_SIZE * link_id);
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 2e9fd91572d4..2dbe34b41ef1 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -233,6 +233,7 @@ struct sdw_intel_ctx {
  * struct sdw_intel_res - Soundwire Intel global resource structure,
  * typically populated by the DSP driver
  *
+ * @hw_ops: abstraction for platform ops
  * @count: link count
  * @mmio_base: mmio base of SoundWire registers
  * @irq: interrupt number
@@ -249,6 +250,7 @@ struct sdw_intel_ctx {
  * @alh_base: sdw alh base.
  */
 struct sdw_intel_res {
+	const struct sdw_intel_hw_ops *hw_ops;
 	int count;
 	void __iomem *mmio_base;
 	int irq;
@@ -292,4 +294,17 @@ irqreturn_t sdw_intel_thread(int irq, void *dev_id);
 
 #define SDW_INTEL_QUIRK_MASK_BUS_DISABLE      BIT(1)
 
+struct sdw_intel;
+
+/* struct intel_sdw_hw_ops - SoundWire ops for Intel platforms.
+ * @pre_bank_switch: helper for bus management
+ * @post_bank_switch: helper for bus management
+ */
+struct sdw_intel_hw_ops {
+	int (*pre_bank_switch)(struct sdw_intel *sdw);
+	int (*post_bank_switch)(struct sdw_intel *sdw);
+};
+
+extern const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops;
+
 #endif
diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 1188ec51816b..3d6254489056 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -188,6 +188,7 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
 
 	memset(&res, 0, sizeof(res));
 
+	res.hw_ops = &sdw_intel_cnl_hw_ops;
 	res.mmio_base = sdev->bar[HDA_DSP_BAR];
 	res.shim_base = hdev->desc->sdw_shim_base;
 	res.alh_base = hdev->desc->sdw_alh_base;
@@ -1694,3 +1695,4 @@ MODULE_IMPORT_NS(SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 MODULE_IMPORT_NS(SND_SOC_SOF_XTENSA);
 MODULE_IMPORT_NS(SND_INTEL_SOUNDWIRE_ACPI);
 MODULE_IMPORT_NS(SOUNDWIRE_INTEL_INIT);
+MODULE_IMPORT_NS(SOUNDWIRE_INTEL);
-- 
2.25.1

[PATCH 2/7] soundwire: intel: add debugfs callbacks in hw_ops

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

No functionality change, only add indirection for debugfs helpers.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c           |  7 +++++--
 drivers/soundwire/intel.h           | 16 ++++++++++++++++
 include/linux/soundwire/sdw_intel.h |  5 +++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index f88319f8ded4..914f2fb43721 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1423,6 +1423,9 @@ static int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
 }
 
 const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
+	.debugfs_init = intel_debugfs_init,
+	.debugfs_exit = intel_debugfs_exit,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1614,7 +1617,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 		goto err_power_up;
 	}
 
-	intel_debugfs_init(sdw);
+	sdw_intel_debugfs_init(sdw);
 
 	/* start bus */
 	ret = intel_start_bus(sdw);
@@ -1685,7 +1688,7 @@ static void intel_link_remove(struct auxiliary_device *auxdev)
 	 * SDW_INTEL_CLK_STOP_NOT_ALLOWED
 	 */
 	if (!bus->prop.hw_disabled) {
-		intel_debugfs_exit(sdw);
+		sdw_intel_debugfs_exit(sdw);
 		sdw_cdns_enable_interrupt(cdns, false);
 	}
 	sdw_bus_master_delete(bus);
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 3170df76b411..5548b8451d01 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -61,4 +61,20 @@ struct sdw_intel_link_dev {
 #define auxiliary_dev_to_sdw_intel_link_dev(auxiliary_dev) \
 	container_of(auxiliary_dev, struct sdw_intel_link_dev, auxdev)
 
+#define SDW_INTEL_CHECK_OPS(sdw, cb)	((sdw) && (sdw)->link_res && (sdw)->link_res->hw_ops && \
+					 (sdw)->link_res->hw_ops->cb)
+#define SDW_INTEL_OPS(sdw, cb)		((sdw)->link_res->hw_ops->cb)
+
+static inline void sdw_intel_debugfs_init(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, debugfs_init))
+		SDW_INTEL_OPS(sdw, debugfs_init)(sdw);
+}
+
+static inline void sdw_intel_debugfs_exit(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, debugfs_exit))
+		SDW_INTEL_OPS(sdw, debugfs_exit)(sdw);
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 2dbe34b41ef1..211924e4ebf2 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -297,10 +297,15 @@ irqreturn_t sdw_intel_thread(int irq, void *dev_id);
 struct sdw_intel;
 
 /* struct intel_sdw_hw_ops - SoundWire ops for Intel platforms.
+ * @debugfs_init: initialize all debugfs capabilities
+ * @debugfs_exit: close and cleanup debugfs capabilities
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
 struct sdw_intel_hw_ops {
+	void (*debugfs_init)(struct sdw_intel *sdw);
+	void (*debugfs_exit)(struct sdw_intel *sdw);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };
-- 
2.25.1

[PATCH 3/7] soundwire: intel: add register_dai callback in hw_ops

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

No functionality change, only add indirection for DAI registration
helper.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c           | 4 +++-
 drivers/soundwire/intel.h           | 7 +++++++
 include/linux/soundwire/sdw_intel.h | 3 +++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 914f2fb43721..0496eb0d6084 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1426,6 +1426,8 @@ const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
 	.debugfs_init = intel_debugfs_init,
 	.debugfs_exit = intel_debugfs_exit,
 
+	.register_dai = intel_register_dai,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1611,7 +1613,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 		goto err_init;
 
 	/* Register DAIs */
-	ret = intel_register_dai(sdw);
+	ret = sdw_intel_register_dai(sdw);
 	if (ret) {
 		dev_err(dev, "DAI registration failed: %d\n", ret);
 		goto err_power_up;
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 5548b8451d01..0521cab311a3 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -77,4 +77,11 @@ static inline void sdw_intel_debugfs_exit(struct sdw_intel *sdw)
 		SDW_INTEL_OPS(sdw, debugfs_exit)(sdw);
 }
 
+static inline int sdw_intel_register_dai(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, register_dai))
+		return SDW_INTEL_OPS(sdw, register_dai)(sdw);
+	return -ENOTSUPP;
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 211924e4ebf2..5be63d4fe62e 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -299,6 +299,7 @@ struct sdw_intel;
 /* struct intel_sdw_hw_ops - SoundWire ops for Intel platforms.
  * @debugfs_init: initialize all debugfs capabilities
  * @debugfs_exit: close and cleanup debugfs capabilities
+ * @register_dai: read all PDI information and register DAIs
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
@@ -306,6 +307,8 @@ struct sdw_intel_hw_ops {
 	void (*debugfs_init)(struct sdw_intel *sdw);
 	void (*debugfs_exit)(struct sdw_intel *sdw);
 
+	int (*register_dai)(struct sdw_intel *sdw);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };
-- 
2.25.1

[PATCH 4/7] soundwire: intel: add bus management callbacks in hw_ops

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

No functionality change, only add indirection for bus management
helpers.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c           | 24 ++++++++++++--------
 drivers/soundwire/intel.h           | 34 +++++++++++++++++++++++++++++
 include/linux/soundwire/sdw_intel.h | 11 ++++++++++
 3 files changed, 60 insertions(+), 9 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 0496eb0d6084..6d2fdf3a01fd 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1428,6 +1428,12 @@ const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
 
 	.register_dai = intel_register_dai,
 
+	.check_clock_stop = intel_check_clock_stop,
+	.start_bus = intel_start_bus,
+	.start_bus_after_reset = intel_start_bus_after_reset,
+	.start_bus_after_clock_stop = intel_start_bus_after_clock_stop,
+	.stop_bus = intel_stop_bus,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1622,7 +1628,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	sdw_intel_debugfs_init(sdw);
 
 	/* start bus */
-	ret = intel_start_bus(sdw);
+	ret = sdw_intel_start_bus(sdw);
 	if (ret) {
 		dev_err(dev, "bus start failed: %d\n", ret);
 		goto err_power_up;
@@ -1850,7 +1856,7 @@ static int __maybe_unused intel_suspend(struct device *dev)
 		return 0;
 	}
 
-	ret = intel_stop_bus(sdw, false);
+	ret = sdw_intel_stop_bus(sdw, false);
 	if (ret < 0) {
 		dev_err(dev, "%s: cannot stop bus: %d\n", __func__, ret);
 		return ret;
@@ -1876,14 +1882,14 @@ static int __maybe_unused intel_suspend_runtime(struct device *dev)
 	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
 	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
-		ret = intel_stop_bus(sdw, false);
+		ret = sdw_intel_stop_bus(sdw, false);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot stop bus during teardown: %d\n",
 				__func__, ret);
 			return ret;
 		}
 	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || !clock_stop_quirks) {
-		ret = intel_stop_bus(sdw, true);
+		ret = sdw_intel_stop_bus(sdw, true);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot stop bus during clock_stop: %d\n",
 				__func__, ret);
@@ -1941,7 +1947,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 	 */
 	sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
 
-	ret = intel_start_bus(sdw);
+	ret = sdw_intel_start_bus(sdw);
 	if (ret < 0) {
 		dev_err(dev, "cannot start bus during resume\n");
 		intel_link_power_down(sdw);
@@ -1995,7 +2001,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		 */
 		sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
 
-		ret = intel_start_bus(sdw);
+		ret = sdw_intel_start_bus(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
 			intel_link_power_down(sdw);
@@ -2010,7 +2016,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 			return ret;
 		}
 
-		ret = intel_start_bus_after_reset(sdw);
+		ret = sdw_intel_start_bus_after_reset(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
 			intel_link_power_down(sdw);
@@ -2018,7 +2024,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		}
 	} else if (!clock_stop_quirks) {
 
-		intel_check_clock_stop(sdw);
+		sdw_intel_check_clock_stop(sdw);
 
 		ret = intel_link_power_up(sdw);
 		if (ret) {
@@ -2026,7 +2032,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 			return ret;
 		}
 
-		ret = intel_start_bus_after_clock_stop(sdw);
+		ret = sdw_intel_start_bus_after_clock_stop(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
 			intel_link_power_down(sdw);
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 0521cab311a3..99a2d875a331 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -84,4 +84,38 @@ static inline int sdw_intel_register_dai(struct sdw_intel *sdw)
 	return -ENOTSUPP;
 }
 
+static inline void sdw_intel_check_clock_stop(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, check_clock_stop))
+		SDW_INTEL_OPS(sdw, check_clock_stop)(sdw);
+}
+
+static inline int sdw_intel_start_bus(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, start_bus))
+		return SDW_INTEL_OPS(sdw, start_bus)(sdw);
+	return -ENOTSUPP;
+}
+
+static inline int sdw_intel_start_bus_after_reset(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, start_bus_after_reset))
+		return SDW_INTEL_OPS(sdw, start_bus_after_reset)(sdw);
+	return -ENOTSUPP;
+}
+
+static inline int sdw_intel_start_bus_after_clock_stop(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, start_bus_after_clock_stop))
+		return SDW_INTEL_OPS(sdw, start_bus_after_clock_stop)(sdw);
+	return -ENOTSUPP;
+}
+
+static inline int sdw_intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, stop_bus))
+		return SDW_INTEL_OPS(sdw, stop_bus)(sdw, clock_stop);
+	return -ENOTSUPP;
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 5be63d4fe62e..cee61bc9af8a 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -300,6 +300,11 @@ struct sdw_intel;
  * @debugfs_init: initialize all debugfs capabilities
  * @debugfs_exit: close and cleanup debugfs capabilities
  * @register_dai: read all PDI information and register DAIs
+ * @check_clock_stop: throw error message if clock is not stopped.
+ * @start_bus: normal start
+ * @start_bus_after_reset: start after reset
+ * @start_bus_after_clock_stop: start after mode0 clock stop
+ * @stop_bus: stop all bus
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
@@ -309,6 +314,12 @@ struct sdw_intel_hw_ops {
 
 	int (*register_dai)(struct sdw_intel *sdw);
 
+	void (*check_clock_stop)(struct sdw_intel *sdw);
+	int (*start_bus)(struct sdw_intel *sdw);
+	int (*start_bus_after_reset)(struct sdw_intel *sdw);
+	int (*start_bus_after_clock_stop)(struct sdw_intel *sdw);
+	int (*stop_bus)(struct sdw_intel *sdw, bool clock_stop);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };
-- 
2.25.1

[PATCH 5/7] soundwire: intel: add link power management callbacks in hw_ops

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

No functionality change, only add indirection for link power
management helpers.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c           | 23 +++++++++++++----------
 drivers/soundwire/intel.h           | 14 ++++++++++++++
 include/linux/soundwire/sdw_intel.h |  5 +++++
 3 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 6d2fdf3a01fd..2320f1b8a2d1 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1434,6 +1434,9 @@ const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
 	.start_bus_after_clock_stop = intel_start_bus_after_clock_stop,
 	.stop_bus = intel_stop_bus,
 
+	.link_power_up = intel_link_power_up,
+	.link_power_down = intel_link_power_down,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1614,7 +1617,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	bus->multi_link = multi_link;
 
 	/* Initialize shim, controller */
-	ret = intel_link_power_up(sdw);
+	ret = sdw_intel_link_power_up(sdw);
 	if (ret)
 		goto err_init;
 
@@ -1679,7 +1682,7 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	return 0;
 
 err_power_up:
-	intel_link_power_down(sdw);
+	sdw_intel_link_power_down(sdw);
 err_init:
 	return ret;
 }
@@ -1935,7 +1938,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 			pm_runtime_idle(dev);
 	}
 
-	ret = intel_link_power_up(sdw);
+	ret = sdw_intel_link_power_up(sdw);
 	if (ret) {
 		dev_err(dev, "%s failed: %d\n", __func__, ret);
 		return ret;
@@ -1950,7 +1953,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 	ret = sdw_intel_start_bus(sdw);
 	if (ret < 0) {
 		dev_err(dev, "cannot start bus during resume\n");
-		intel_link_power_down(sdw);
+		sdw_intel_link_power_down(sdw);
 		return ret;
 	}
 
@@ -1989,7 +1992,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
 	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
-		ret = intel_link_power_up(sdw);
+		ret = sdw_intel_link_power_up(sdw);
 		if (ret) {
 			dev_err(dev, "%s: power_up failed after teardown: %d\n", __func__, ret);
 			return ret;
@@ -2004,13 +2007,13 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		ret = sdw_intel_start_bus(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
-			intel_link_power_down(sdw);
+			sdw_intel_link_power_down(sdw);
 			return ret;
 		}
 
 
 	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
-		ret = intel_link_power_up(sdw);
+		ret = sdw_intel_link_power_up(sdw);
 		if (ret) {
 			dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
 			return ret;
@@ -2019,14 +2022,14 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		ret = sdw_intel_start_bus_after_reset(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
-			intel_link_power_down(sdw);
+			sdw_intel_link_power_down(sdw);
 			return ret;
 		}
 	} else if (!clock_stop_quirks) {
 
 		sdw_intel_check_clock_stop(sdw);
 
-		ret = intel_link_power_up(sdw);
+		ret = sdw_intel_link_power_up(sdw);
 		if (ret) {
 			dev_err(dev, "%s: power_up failed: %d\n", __func__, ret);
 			return ret;
@@ -2035,7 +2038,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		ret = sdw_intel_start_bus_after_clock_stop(sdw);
 		if (ret < 0) {
 			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
-			intel_link_power_down(sdw);
+			sdw_intel_link_power_down(sdw);
 			return ret;
 		}
 	} else {
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 99a2d875a331..0f63e7584132 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -118,4 +118,18 @@ static inline int sdw_intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
 	return -ENOTSUPP;
 }
 
+static inline int sdw_intel_link_power_up(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, link_power_up))
+		return SDW_INTEL_OPS(sdw, link_power_up)(sdw);
+	return -ENOTSUPP;
+}
+
+static inline int sdw_intel_link_power_down(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, link_power_down))
+		return SDW_INTEL_OPS(sdw, link_power_down)(sdw);
+	return -ENOTSUPP;
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index cee61bc9af8a..81430201b8b9 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -305,6 +305,8 @@ struct sdw_intel;
  * @start_bus_after_reset: start after reset
  * @start_bus_after_clock_stop: start after mode0 clock stop
  * @stop_bus: stop all bus
+ * @link_power_up: power-up using chip-specific helpers
+ * @link_power_down: power-down with chip-specific helpers
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
@@ -320,6 +322,9 @@ struct sdw_intel_hw_ops {
 	int (*start_bus_after_clock_stop)(struct sdw_intel *sdw);
 	int (*stop_bus)(struct sdw_intel *sdw, bool clock_stop);
 
+	int (*link_power_up)(struct sdw_intel *sdw);
+	int (*link_power_down)(struct sdw_intel *sdw);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };
-- 
2.25.1

[PATCH 6/7] soundwire: intel: add in-band wake callbacks in hw_ops

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

No functionality change, only add indirection for in-band wake
management helpers.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c           | 11 +++++++----
 drivers/soundwire/intel.h           | 13 +++++++++++++
 include/linux/soundwire/sdw_intel.h |  5 +++++
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 2320f1b8a2d1..ea6479b4010d 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1437,6 +1437,9 @@ const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
 	.link_power_up = intel_link_power_up,
 	.link_power_down = intel_link_power_down,
 
+	.shim_check_wake = intel_shim_check_wake,
+	.shim_wake = intel_shim_wake,
+
 	.pre_bank_switch = intel_pre_bank_switch,
 	.post_bank_switch = intel_post_bank_switch,
 };
@@ -1720,11 +1723,11 @@ int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
 		return 0;
 	}
 
-	if (!intel_shim_check_wake(sdw))
+	if (!sdw_intel_shim_check_wake(sdw))
 		return 0;
 
 	/* disable WAKEEN interrupt ASAP to prevent interrupt flood */
-	intel_shim_wake(sdw, false);
+	sdw_intel_shim_wake(sdw, false);
 
 	/*
 	 * resume the Master, which will generate a bus reset and result in
@@ -1852,7 +1855,7 @@ static int __maybe_unused intel_suspend(struct device *dev)
 				 */
 				dev_err(dev, "%s: invalid config: parent is suspended\n", __func__);
 			} else {
-				intel_shim_wake(sdw, false);
+				sdw_intel_shim_wake(sdw, false);
 			}
 		}
 
@@ -1987,7 +1990,7 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 	}
 
 	/* unconditionally disable WAKEEN interrupt */
-	intel_shim_wake(sdw, false);
+	sdw_intel_shim_wake(sdw, false);
 
 	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 0f63e7584132..9ac3397757a0 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -132,4 +132,17 @@ static inline int sdw_intel_link_power_down(struct sdw_intel *sdw)
 	return -ENOTSUPP;
 }
 
+static inline int sdw_intel_shim_check_wake(struct sdw_intel *sdw)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, shim_check_wake))
+		return SDW_INTEL_OPS(sdw, shim_check_wake)(sdw);
+	return -ENOTSUPP;
+}
+
+static inline void sdw_intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+	if (SDW_INTEL_CHECK_OPS(sdw, shim_wake))
+		SDW_INTEL_OPS(sdw, shim_wake)(sdw, wake_enable);
+}
+
 #endif /* __SDW_INTEL_LOCAL_H */
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h
index 81430201b8b9..0942cd464095 100644
--- a/include/linux/soundwire/sdw_intel.h
+++ b/include/linux/soundwire/sdw_intel.h
@@ -307,6 +307,8 @@ struct sdw_intel;
  * @stop_bus: stop all bus
  * @link_power_up: power-up using chip-specific helpers
  * @link_power_down: power-down with chip-specific helpers
+ * @shim_check_wake: check if a wake was received
+ * @shim_wake: enable/disable in-band wake management
  * @pre_bank_switch: helper for bus management
  * @post_bank_switch: helper for bus management
  */
@@ -325,6 +327,9 @@ struct sdw_intel_hw_ops {
 	int (*link_power_up)(struct sdw_intel *sdw);
 	int (*link_power_down)(struct sdw_intel *sdw);
 
+	int  (*shim_check_wake)(struct sdw_intel *sdw);
+	void (*shim_wake)(struct sdw_intel *sdw, bool wake_enable);
+
 	int (*pre_bank_switch)(struct sdw_intel *sdw);
 	int (*post_bank_switch)(struct sdw_intel *sdw);
 };
-- 
2.25.1

[PATCH 7/7] soundwire: intel: split auxdevice to different file

[Bard Liao]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

The auxdevice layer is completely generic, it should be split from
intel.c which is only geared to the 'cnl' hw_ops now.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/Makefile          |   2 +-
 drivers/soundwire/intel.c           | 657 ---------------------------
 drivers/soundwire/intel.h           |  11 +-
 drivers/soundwire/intel_auxdevice.c | 678 ++++++++++++++++++++++++++++
 drivers/soundwire/intel_auxdevice.h |  18 +
 drivers/soundwire/intel_init.c      |   1 +
 6 files changed, 700 insertions(+), 667 deletions(-)
 create mode 100644 drivers/soundwire/intel_auxdevice.c
 create mode 100644 drivers/soundwire/intel_auxdevice.h

diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
index 986776787b9e..ca97414ada70 100644
--- a/drivers/soundwire/Makefile
+++ b/drivers/soundwire/Makefile
@@ -20,7 +20,7 @@ soundwire-cadence-y := cadence_master.o
 obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
 
 #Intel driver
-soundwire-intel-y :=	intel.o intel_init.o dmi-quirks.o
+soundwire-intel-y :=	intel.o intel_auxdevice.o intel_init.o dmi-quirks.o
 obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o
 
 #Qualcomm driver
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index ea6479b4010d..bc9c50bacc49 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -8,10 +8,7 @@
 #include <linux/acpi.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
 #include <linux/io.h>
-#include <linux/auxiliary_bus.h>
 #include <sound/pcm_params.h>
 #include <linux/pm_runtime.h>
 #include <sound/soc.h>
@@ -22,27 +19,6 @@
 #include "bus.h"
 #include "intel.h"
 
-/* IDA min selected to avoid conflicts with HDaudio/iDISP SDI values */
-#define INTEL_DEV_NUM_IDA_MIN           4
-
-#define INTEL_MASTER_SUSPEND_DELAY_MS	3000
-#define INTEL_MASTER_RESET_ITERATIONS	10
-
-/*
- * debug/config flags for the Intel SoundWire Master.
- *
- * Since we may have multiple masters active, we can have up to 8
- * flags reused in each byte, with master0 using the ls-byte, etc.
- */
-
-#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME		BIT(0)
-#define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP		BIT(1)
-#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE	BIT(2)
-#define SDW_INTEL_MASTER_DISABLE_MULTI_LINK		BIT(3)
-
-static int md_flags;
-module_param_named(sdw_md_flags, md_flags, int, 0444);
-MODULE_PARM_DESC(sdw_md_flags, "SoundWire Intel Master device flags (0x0 all off)");
 
 enum intel_pdi_type {
 	INTEL_PDI_IN = 0,
@@ -1445,636 +1421,3 @@ const struct sdw_intel_hw_ops sdw_intel_cnl_hw_ops = {
 };
 EXPORT_SYMBOL_NS(sdw_intel_cnl_hw_ops, SOUNDWIRE_INTEL);
 
-static int generic_pre_bank_switch(struct sdw_bus *bus)
-{
-	struct sdw_cdns *cdns = bus_to_cdns(bus);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-
-	return sdw->link_res->hw_ops->pre_bank_switch(sdw);
-}
-
-static int generic_post_bank_switch(struct sdw_bus *bus)
-{
-	struct sdw_cdns *cdns = bus_to_cdns(bus);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-
-	return sdw->link_res->hw_ops->post_bank_switch(sdw);
-}
-
-static int sdw_master_read_intel_prop(struct sdw_bus *bus)
-{
-	struct sdw_master_prop *prop = &bus->prop;
-	struct fwnode_handle *link;
-	char name[32];
-	u32 quirk_mask;
-
-	/* Find master handle */
-	snprintf(name, sizeof(name),
-		 "mipi-sdw-link-%d-subproperties", bus->link_id);
-
-	link = device_get_named_child_node(bus->dev, name);
-	if (!link) {
-		dev_err(bus->dev, "Master node %s not found\n", name);
-		return -EIO;
-	}
-
-	fwnode_property_read_u32(link,
-				 "intel-sdw-ip-clock",
-				 &prop->mclk_freq);
-
-	/* the values reported by BIOS are the 2x clock, not the bus clock */
-	prop->mclk_freq /= 2;
-
-	fwnode_property_read_u32(link,
-				 "intel-quirk-mask",
-				 &quirk_mask);
-
-	if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE)
-		prop->hw_disabled = true;
-
-	prop->quirks = SDW_MASTER_QUIRKS_CLEAR_INITIAL_CLASH |
-		SDW_MASTER_QUIRKS_CLEAR_INITIAL_PARITY;
-
-	return 0;
-}
-
-static int intel_prop_read(struct sdw_bus *bus)
-{
-	/* Initialize with default handler to read all DisCo properties */
-	sdw_master_read_prop(bus);
-
-	/* read Intel-specific properties */
-	sdw_master_read_intel_prop(bus);
-
-	return 0;
-}
-
-static struct sdw_master_ops sdw_intel_ops = {
-	.read_prop = intel_prop_read,
-	.override_adr = sdw_dmi_override_adr,
-	.xfer_msg = cdns_xfer_msg,
-	.xfer_msg_defer = cdns_xfer_msg_defer,
-	.reset_page_addr = cdns_reset_page_addr,
-	.set_bus_conf = cdns_bus_conf,
-	.pre_bank_switch = generic_pre_bank_switch,
-	.post_bank_switch = generic_post_bank_switch,
-	.read_ping_status = cdns_read_ping_status,
-};
-
-/*
- * probe and init (aux_dev_id argument is required by function prototype but not used)
- */
-static int intel_link_probe(struct auxiliary_device *auxdev,
-			    const struct auxiliary_device_id *aux_dev_id)
-
-{
-	struct device *dev = &auxdev->dev;
-	struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
-	struct sdw_intel *sdw;
-	struct sdw_cdns *cdns;
-	struct sdw_bus *bus;
-	int ret;
-
-	sdw = devm_kzalloc(dev, sizeof(*sdw), GFP_KERNEL);
-	if (!sdw)
-		return -ENOMEM;
-
-	cdns = &sdw->cdns;
-	bus = &cdns->bus;
-
-	sdw->instance = auxdev->id;
-	sdw->link_res = &ldev->link_res;
-	cdns->dev = dev;
-	cdns->registers = sdw->link_res->registers;
-	cdns->instance = sdw->instance;
-	cdns->msg_count = 0;
-
-	bus->link_id = auxdev->id;
-	bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN;
-	bus->clk_stop_timeout = 1;
-
-	sdw_cdns_probe(cdns);
-
-	/* Set ops */
-	bus->ops = &sdw_intel_ops;
-
-	/* set driver data, accessed by snd_soc_dai_get_drvdata() */
-	auxiliary_set_drvdata(auxdev, cdns);
-
-	/* use generic bandwidth allocation algorithm */
-	sdw->cdns.bus.compute_params = sdw_compute_params;
-
-	/* avoid resuming from pm_runtime suspend if it's not required */
-	dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND);
-
-	ret = sdw_bus_master_add(bus, dev, dev->fwnode);
-	if (ret) {
-		dev_err(dev, "sdw_bus_master_add fail: %d\n", ret);
-		return ret;
-	}
-
-	if (bus->prop.hw_disabled)
-		dev_info(dev,
-			 "SoundWire master %d is disabled, will be ignored\n",
-			 bus->link_id);
-	/*
-	 * Ignore BIOS err_threshold, it's a really bad idea when dealing
-	 * with multiple hardware synchronized links
-	 */
-	bus->prop.err_threshold = 0;
-
-	return 0;
-}
-
-int intel_link_startup(struct auxiliary_device *auxdev)
-{
-	struct device *dev = &auxdev->dev;
-	struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-	int link_flags;
-	bool multi_link;
-	u32 clock_stop_quirks;
-	int ret;
-
-	if (bus->prop.hw_disabled) {
-		dev_info(dev,
-			 "SoundWire master %d is disabled, ignoring\n",
-			 sdw->instance);
-		return 0;
-	}
-
-	link_flags = md_flags >> (bus->link_id * 8);
-	multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK);
-	if (!multi_link) {
-		dev_dbg(dev, "Multi-link is disabled\n");
-	} else {
-		/*
-		 * hardware-based synchronization is required regardless
-		 * of the number of segments used by a stream: SSP-based
-		 * synchronization is gated by gsync when the multi-master
-		 * mode is set.
-		 */
-		bus->hw_sync_min_links = 1;
-	}
-	bus->multi_link = multi_link;
-
-	/* Initialize shim, controller */
-	ret = sdw_intel_link_power_up(sdw);
-	if (ret)
-		goto err_init;
-
-	/* Register DAIs */
-	ret = sdw_intel_register_dai(sdw);
-	if (ret) {
-		dev_err(dev, "DAI registration failed: %d\n", ret);
-		goto err_power_up;
-	}
-
-	sdw_intel_debugfs_init(sdw);
-
-	/* start bus */
-	ret = sdw_intel_start_bus(sdw);
-	if (ret) {
-		dev_err(dev, "bus start failed: %d\n", ret);
-		goto err_power_up;
-	}
-
-	/* Enable runtime PM */
-	if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) {
-		pm_runtime_set_autosuspend_delay(dev,
-						 INTEL_MASTER_SUSPEND_DELAY_MS);
-		pm_runtime_use_autosuspend(dev);
-		pm_runtime_mark_last_busy(dev);
-
-		pm_runtime_set_active(dev);
-		pm_runtime_enable(dev);
-	}
-
-	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
-	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_NOT_ALLOWED) {
-		/*
-		 * To keep the clock running we need to prevent
-		 * pm_runtime suspend from happening by increasing the
-		 * reference count.
-		 * This quirk is specified by the parent PCI device in
-		 * case of specific latency requirements. It will have
-		 * no effect if pm_runtime is disabled by the user via
-		 * a module parameter for testing purposes.
-		 */
-		pm_runtime_get_noresume(dev);
-	}
-
-	/*
-	 * The runtime PM status of Slave devices is "Unsupported"
-	 * until they report as ATTACHED. If they don't, e.g. because
-	 * there are no Slave devices populated or if the power-on is
-	 * delayed or dependent on a power switch, the Master will
-	 * remain active and prevent its parent from suspending.
-	 *
-	 * Conditionally force the pm_runtime core to re-evaluate the
-	 * Master status in the absence of any Slave activity. A quirk
-	 * is provided to e.g. deal with Slaves that may be powered on
-	 * with a delay. A more complete solution would require the
-	 * definition of Master properties.
-	 */
-	if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE))
-		pm_runtime_idle(dev);
-
-	sdw->startup_done = true;
-	return 0;
-
-err_power_up:
-	sdw_intel_link_power_down(sdw);
-err_init:
-	return ret;
-}
-
-static void intel_link_remove(struct auxiliary_device *auxdev)
-{
-	struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-
-	/*
-	 * Since pm_runtime is already disabled, we don't decrease
-	 * the refcount when the clock_stop_quirk is
-	 * SDW_INTEL_CLK_STOP_NOT_ALLOWED
-	 */
-	if (!bus->prop.hw_disabled) {
-		sdw_intel_debugfs_exit(sdw);
-		sdw_cdns_enable_interrupt(cdns, false);
-	}
-	sdw_bus_master_delete(bus);
-}
-
-int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
-{
-	struct device *dev = &auxdev->dev;
-	struct sdw_intel *sdw;
-	struct sdw_bus *bus;
-
-	sdw = auxiliary_get_drvdata(auxdev);
-	bus = &sdw->cdns.bus;
-
-	if (bus->prop.hw_disabled || !sdw->startup_done) {
-		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
-			bus->link_id);
-		return 0;
-	}
-
-	if (!sdw_intel_shim_check_wake(sdw))
-		return 0;
-
-	/* disable WAKEEN interrupt ASAP to prevent interrupt flood */
-	sdw_intel_shim_wake(sdw, false);
-
-	/*
-	 * resume the Master, which will generate a bus reset and result in
-	 * Slaves re-attaching and be re-enumerated. The SoundWire physical
-	 * device which generated the wake will trigger an interrupt, which
-	 * will in turn cause the corresponding Linux Slave device to be
-	 * resumed and the Slave codec driver to check the status.
-	 */
-	pm_request_resume(dev);
-
-	return 0;
-}
-
-/*
- * PM calls
- */
-
-static int intel_resume_child_device(struct device *dev, void *data)
-{
-	int ret;
-	struct sdw_slave *slave = dev_to_sdw_dev(dev);
-
-	if (!slave->probed) {
-		dev_dbg(dev, "skipping device, no probed driver\n");
-		return 0;
-	}
-	if (!slave->dev_num_sticky) {
-		dev_dbg(dev, "skipping device, never detected on bus\n");
-		return 0;
-	}
-
-	ret = pm_request_resume(dev);
-	if (ret < 0)
-		dev_err(dev, "%s: pm_request_resume failed: %d\n", __func__, ret);
-
-	return ret;
-}
-
-static int __maybe_unused intel_pm_prepare(struct device *dev)
-{
-	struct sdw_cdns *cdns = dev_get_drvdata(dev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-	u32 clock_stop_quirks;
-	int ret;
-
-	if (bus->prop.hw_disabled || !sdw->startup_done) {
-		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
-			bus->link_id);
-		return 0;
-	}
-
-	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
-
-	if (pm_runtime_suspended(dev) &&
-	    pm_runtime_suspended(dev->parent) &&
-	    ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
-	     !clock_stop_quirks)) {
-		/*
-		 * if we've enabled clock stop, and the parent is suspended, the SHIM registers
-		 * are not accessible and the shim wake cannot be disabled.
-		 * The only solution is to resume the entire bus to full power
-		 */
-
-		/*
-		 * If any operation in this block fails, we keep going since we don't want
-		 * to prevent system suspend from happening and errors should be recoverable
-		 * on resume.
-		 */
-
-		/*
-		 * first resume the device for this link. This will also by construction
-		 * resume the PCI parent device.
-		 */
-		ret = pm_request_resume(dev);
-		if (ret < 0) {
-			dev_err(dev, "%s: pm_request_resume failed: %d\n", __func__, ret);
-			return 0;
-		}
-
-		/*
-		 * Continue resuming the entire bus (parent + child devices) to exit
-		 * the clock stop mode. If there are no devices connected on this link
-		 * this is a no-op.
-		 * The resume to full power could have been implemented with a .prepare
-		 * step in SoundWire codec drivers. This would however require a lot
-		 * of code to handle an Intel-specific corner case. It is simpler in
-		 * practice to add a loop at the link level.
-		 */
-		ret = device_for_each_child(bus->dev, NULL, intel_resume_child_device);
-
-		if (ret < 0)
-			dev_err(dev, "%s: intel_resume_child_device failed: %d\n", __func__, ret);
-	}
-
-	return 0;
-}
-
-static int __maybe_unused intel_suspend(struct device *dev)
-{
-	struct sdw_cdns *cdns = dev_get_drvdata(dev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-	u32 clock_stop_quirks;
-	int ret;
-
-	if (bus->prop.hw_disabled || !sdw->startup_done) {
-		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
-			bus->link_id);
-		return 0;
-	}
-
-	if (pm_runtime_suspended(dev)) {
-		dev_dbg(dev, "pm_runtime status: suspended\n");
-
-		clock_stop_quirks = sdw->link_res->clock_stop_quirks;
-
-		if ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
-		    !clock_stop_quirks) {
-
-			if (pm_runtime_suspended(dev->parent)) {
-				/*
-				 * paranoia check: this should not happen with the .prepare
-				 * resume to full power
-				 */
-				dev_err(dev, "%s: invalid config: parent is suspended\n", __func__);
-			} else {
-				sdw_intel_shim_wake(sdw, false);
-			}
-		}
-
-		return 0;
-	}
-
-	ret = sdw_intel_stop_bus(sdw, false);
-	if (ret < 0) {
-		dev_err(dev, "%s: cannot stop bus: %d\n", __func__, ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static int __maybe_unused intel_suspend_runtime(struct device *dev)
-{
-	struct sdw_cdns *cdns = dev_get_drvdata(dev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-	u32 clock_stop_quirks;
-	int ret;
-
-	if (bus->prop.hw_disabled || !sdw->startup_done) {
-		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
-			bus->link_id);
-		return 0;
-	}
-
-	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
-
-	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
-		ret = sdw_intel_stop_bus(sdw, false);
-		if (ret < 0) {
-			dev_err(dev, "%s: cannot stop bus during teardown: %d\n",
-				__func__, ret);
-			return ret;
-		}
-	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || !clock_stop_quirks) {
-		ret = sdw_intel_stop_bus(sdw, true);
-		if (ret < 0) {
-			dev_err(dev, "%s: cannot stop bus during clock_stop: %d\n",
-				__func__, ret);
-			return ret;
-		}
-	} else {
-		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
-			__func__, clock_stop_quirks);
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static int __maybe_unused intel_resume(struct device *dev)
-{
-	struct sdw_cdns *cdns = dev_get_drvdata(dev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-	int link_flags;
-	int ret;
-
-	if (bus->prop.hw_disabled || !sdw->startup_done) {
-		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
-			bus->link_id);
-		return 0;
-	}
-
-	link_flags = md_flags >> (bus->link_id * 8);
-
-	if (pm_runtime_suspended(dev)) {
-		dev_dbg(dev, "pm_runtime status was suspended, forcing active\n");
-
-		/* follow required sequence from runtime_pm.rst */
-		pm_runtime_disable(dev);
-		pm_runtime_set_active(dev);
-		pm_runtime_mark_last_busy(dev);
-		pm_runtime_enable(dev);
-
-		link_flags = md_flags >> (bus->link_id * 8);
-
-		if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE))
-			pm_runtime_idle(dev);
-	}
-
-	ret = sdw_intel_link_power_up(sdw);
-	if (ret) {
-		dev_err(dev, "%s failed: %d\n", __func__, ret);
-		return ret;
-	}
-
-	/*
-	 * make sure all Slaves are tagged as UNATTACHED and provide
-	 * reason for reinitialization
-	 */
-	sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
-
-	ret = sdw_intel_start_bus(sdw);
-	if (ret < 0) {
-		dev_err(dev, "cannot start bus during resume\n");
-		sdw_intel_link_power_down(sdw);
-		return ret;
-	}
-
-	/*
-	 * after system resume, the pm_runtime suspend() may kick in
-	 * during the enumeration, before any children device force the
-	 * master device to remain active.  Using pm_runtime_get()
-	 * routines is not really possible, since it'd prevent the
-	 * master from suspending.
-	 * A reasonable compromise is to update the pm_runtime
-	 * counters and delay the pm_runtime suspend by several
-	 * seconds, by when all enumeration should be complete.
-	 */
-	pm_runtime_mark_last_busy(dev);
-
-	return 0;
-}
-
-static int __maybe_unused intel_resume_runtime(struct device *dev)
-{
-	struct sdw_cdns *cdns = dev_get_drvdata(dev);
-	struct sdw_intel *sdw = cdns_to_intel(cdns);
-	struct sdw_bus *bus = &cdns->bus;
-	u32 clock_stop_quirks;
-	int ret;
-
-	if (bus->prop.hw_disabled || !sdw->startup_done) {
-		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
-			bus->link_id);
-		return 0;
-	}
-
-	/* unconditionally disable WAKEEN interrupt */
-	sdw_intel_shim_wake(sdw, false);
-
-	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
-
-	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
-		ret = sdw_intel_link_power_up(sdw);
-		if (ret) {
-			dev_err(dev, "%s: power_up failed after teardown: %d\n", __func__, ret);
-			return ret;
-		}
-
-		/*
-		 * make sure all Slaves are tagged as UNATTACHED and provide
-		 * reason for reinitialization
-		 */
-		sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
-
-		ret = sdw_intel_start_bus(sdw);
-		if (ret < 0) {
-			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
-			sdw_intel_link_power_down(sdw);
-			return ret;
-		}
-
-
-	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
-		ret = sdw_intel_link_power_up(sdw);
-		if (ret) {
-			dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
-			return ret;
-		}
-
-		ret = sdw_intel_start_bus_after_reset(sdw);
-		if (ret < 0) {
-			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
-			sdw_intel_link_power_down(sdw);
-			return ret;
-		}
-	} else if (!clock_stop_quirks) {
-
-		sdw_intel_check_clock_stop(sdw);
-
-		ret = sdw_intel_link_power_up(sdw);
-		if (ret) {
-			dev_err(dev, "%s: power_up failed: %d\n", __func__, ret);
-			return ret;
-		}
-
-		ret = sdw_intel_start_bus_after_clock_stop(sdw);
-		if (ret < 0) {
-			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
-			sdw_intel_link_power_down(sdw);
-			return ret;
-		}
-	} else {
-		dev_err(dev, "%s: clock_stop_quirks %x unsupported\n",
-			__func__, clock_stop_quirks);
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static const struct dev_pm_ops intel_pm = {
-	.prepare = intel_pm_prepare,
-	SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
-	SET_RUNTIME_PM_OPS(intel_suspend_runtime, intel_resume_runtime, NULL)
-};
-
-static const struct auxiliary_device_id intel_link_id_table[] = {
-	{ .name = "soundwire_intel.link" },
-	{},
-};
-MODULE_DEVICE_TABLE(auxiliary, intel_link_id_table);
-
-static struct auxiliary_driver sdw_intel_drv = {
-	.probe = intel_link_probe,
-	.remove = intel_link_remove,
-	.driver = {
-		/* auxiliary_driver_register() sets .name to be the modname */
-		.pm = &intel_pm,
-	},
-	.id_table = intel_link_id_table
-};
-module_auxiliary_driver(sdw_intel_drv);
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_DESCRIPTION("Intel Soundwire Link Driver");
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 9ac3397757a0..de9883313c8f 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -50,16 +50,9 @@ struct sdw_intel {
 #endif
 };
 
-int intel_link_startup(struct auxiliary_device *auxdev);
-int intel_link_process_wakeen_event(struct auxiliary_device *auxdev);
+#define cdns_to_intel(_cdns) container_of(_cdns, struct sdw_intel, cdns)
 
-struct sdw_intel_link_dev {
-	struct auxiliary_device auxdev;
-	struct sdw_intel_link_res link_res;
-};
-
-#define auxiliary_dev_to_sdw_intel_link_dev(auxiliary_dev) \
-	container_of(auxiliary_dev, struct sdw_intel_link_dev, auxdev)
+#define INTEL_MASTER_RESET_ITERATIONS	10
 
 #define SDW_INTEL_CHECK_OPS(sdw, cb)	((sdw) && (sdw)->link_res && (sdw)->link_res->hw_ops && \
 					 (sdw)->link_res->hw_ops->cb)
diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c
new file mode 100644
index 000000000000..96c6b2112feb
--- /dev/null
+++ b/drivers/soundwire/intel_auxdevice.c
@@ -0,0 +1,678 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+// Copyright(c) 2015-22 Intel Corporation.
+
+/*
+ * Soundwire Intel Manager Driver
+ */
+
+#include <linux/acpi.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/auxiliary_bus.h>
+#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
+#include <sound/soc.h>
+#include <linux/soundwire/sdw_registers.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_intel.h>
+#include "cadence_master.h"
+#include "bus.h"
+#include "intel.h"
+#include "intel_auxdevice.h"
+
+/* IDA min selected to avoid conflicts with HDaudio/iDISP SDI values */
+#define INTEL_DEV_NUM_IDA_MIN           4
+
+#define INTEL_MASTER_SUSPEND_DELAY_MS	3000
+
+/*
+ * debug/config flags for the Intel SoundWire Master.
+ *
+ * Since we may have multiple masters active, we can have up to 8
+ * flags reused in each byte, with master0 using the ls-byte, etc.
+ */
+
+#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME		BIT(0)
+#define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP		BIT(1)
+#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE	BIT(2)
+#define SDW_INTEL_MASTER_DISABLE_MULTI_LINK		BIT(3)
+
+static int md_flags;
+module_param_named(sdw_md_flags, md_flags, int, 0444);
+MODULE_PARM_DESC(sdw_md_flags, "SoundWire Intel Master device flags (0x0 all off)");
+
+static int generic_pre_bank_switch(struct sdw_bus *bus)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+
+	return sdw->link_res->hw_ops->pre_bank_switch(sdw);
+}
+
+static int generic_post_bank_switch(struct sdw_bus *bus)
+{
+	struct sdw_cdns *cdns = bus_to_cdns(bus);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+
+	return sdw->link_res->hw_ops->post_bank_switch(sdw);
+}
+
+static int sdw_master_read_intel_prop(struct sdw_bus *bus)
+{
+	struct sdw_master_prop *prop = &bus->prop;
+	struct fwnode_handle *link;
+	char name[32];
+	u32 quirk_mask;
+
+	/* Find master handle */
+	snprintf(name, sizeof(name),
+		 "mipi-sdw-link-%d-subproperties", bus->link_id);
+
+	link = device_get_named_child_node(bus->dev, name);
+	if (!link) {
+		dev_err(bus->dev, "Master node %s not found\n", name);
+		return -EIO;
+	}
+
+	fwnode_property_read_u32(link,
+				 "intel-sdw-ip-clock",
+				 &prop->mclk_freq);
+
+	/* the values reported by BIOS are the 2x clock, not the bus clock */
+	prop->mclk_freq /= 2;
+
+	fwnode_property_read_u32(link,
+				 "intel-quirk-mask",
+				 &quirk_mask);
+
+	if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE)
+		prop->hw_disabled = true;
+
+	prop->quirks = SDW_MASTER_QUIRKS_CLEAR_INITIAL_CLASH |
+		SDW_MASTER_QUIRKS_CLEAR_INITIAL_PARITY;
+
+	return 0;
+}
+
+static int intel_prop_read(struct sdw_bus *bus)
+{
+	/* Initialize with default handler to read all DisCo properties */
+	sdw_master_read_prop(bus);
+
+	/* read Intel-specific properties */
+	sdw_master_read_intel_prop(bus);
+
+	return 0;
+}
+
+static struct sdw_master_ops sdw_intel_ops = {
+	.read_prop = intel_prop_read,
+	.override_adr = sdw_dmi_override_adr,
+	.xfer_msg = cdns_xfer_msg,
+	.xfer_msg_defer = cdns_xfer_msg_defer,
+	.reset_page_addr = cdns_reset_page_addr,
+	.set_bus_conf = cdns_bus_conf,
+	.pre_bank_switch = generic_pre_bank_switch,
+	.post_bank_switch = generic_post_bank_switch,
+	.read_ping_status = cdns_read_ping_status,
+};
+
+/*
+ * probe and init (aux_dev_id argument is required by function prototype but not used)
+ */
+static int intel_link_probe(struct auxiliary_device *auxdev,
+			    const struct auxiliary_device_id *aux_dev_id)
+
+{
+	struct device *dev = &auxdev->dev;
+	struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
+	struct sdw_intel *sdw;
+	struct sdw_cdns *cdns;
+	struct sdw_bus *bus;
+	int ret;
+
+	sdw = devm_kzalloc(dev, sizeof(*sdw), GFP_KERNEL);
+	if (!sdw)
+		return -ENOMEM;
+
+	cdns = &sdw->cdns;
+	bus = &cdns->bus;
+
+	sdw->instance = auxdev->id;
+	sdw->link_res = &ldev->link_res;
+	cdns->dev = dev;
+	cdns->registers = sdw->link_res->registers;
+	cdns->instance = sdw->instance;
+	cdns->msg_count = 0;
+
+	bus->link_id = auxdev->id;
+	bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN;
+	bus->clk_stop_timeout = 1;
+
+	sdw_cdns_probe(cdns);
+
+	/* Set ops */
+	bus->ops = &sdw_intel_ops;
+
+	/* set driver data, accessed by snd_soc_dai_get_drvdata() */
+	auxiliary_set_drvdata(auxdev, cdns);
+
+	/* use generic bandwidth allocation algorithm */
+	sdw->cdns.bus.compute_params = sdw_compute_params;
+
+	/* avoid resuming from pm_runtime suspend if it's not required */
+	dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND);
+
+	ret = sdw_bus_master_add(bus, dev, dev->fwnode);
+	if (ret) {
+		dev_err(dev, "sdw_bus_master_add fail: %d\n", ret);
+		return ret;
+	}
+
+	if (bus->prop.hw_disabled)
+		dev_info(dev,
+			 "SoundWire master %d is disabled, will be ignored\n",
+			 bus->link_id);
+	/*
+	 * Ignore BIOS err_threshold, it's a really bad idea when dealing
+	 * with multiple hardware synchronized links
+	 */
+	bus->prop.err_threshold = 0;
+
+	return 0;
+}
+
+int intel_link_startup(struct auxiliary_device *auxdev)
+{
+	struct device *dev = &auxdev->dev;
+	struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+	int link_flags;
+	bool multi_link;
+	u32 clock_stop_quirks;
+	int ret;
+
+	if (bus->prop.hw_disabled) {
+		dev_info(dev,
+			 "SoundWire master %d is disabled, ignoring\n",
+			 sdw->instance);
+		return 0;
+	}
+
+	link_flags = md_flags >> (bus->link_id * 8);
+	multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK);
+	if (!multi_link) {
+		dev_dbg(dev, "Multi-link is disabled\n");
+	} else {
+		/*
+		 * hardware-based synchronization is required regardless
+		 * of the number of segments used by a stream: SSP-based
+		 * synchronization is gated by gsync when the multi-master
+		 * mode is set.
+		 */
+		bus->hw_sync_min_links = 1;
+	}
+	bus->multi_link = multi_link;
+
+	/* Initialize shim, controller */
+	ret = sdw_intel_link_power_up(sdw);
+	if (ret)
+		goto err_init;
+
+	/* Register DAIs */
+	ret = sdw_intel_register_dai(sdw);
+	if (ret) {
+		dev_err(dev, "DAI registration failed: %d\n", ret);
+		goto err_power_up;
+	}
+
+	sdw_intel_debugfs_init(sdw);
+
+	/* start bus */
+	ret = sdw_intel_start_bus(sdw);
+	if (ret) {
+		dev_err(dev, "bus start failed: %d\n", ret);
+		goto err_power_up;
+	}
+
+	/* Enable runtime PM */
+	if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) {
+		pm_runtime_set_autosuspend_delay(dev,
+						 INTEL_MASTER_SUSPEND_DELAY_MS);
+		pm_runtime_use_autosuspend(dev);
+		pm_runtime_mark_last_busy(dev);
+
+		pm_runtime_set_active(dev);
+		pm_runtime_enable(dev);
+	}
+
+	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
+	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_NOT_ALLOWED) {
+		/*
+		 * To keep the clock running we need to prevent
+		 * pm_runtime suspend from happening by increasing the
+		 * reference count.
+		 * This quirk is specified by the parent PCI device in
+		 * case of specific latency requirements. It will have
+		 * no effect if pm_runtime is disabled by the user via
+		 * a module parameter for testing purposes.
+		 */
+		pm_runtime_get_noresume(dev);
+	}
+
+	/*
+	 * The runtime PM status of Slave devices is "Unsupported"
+	 * until they report as ATTACHED. If they don't, e.g. because
+	 * there are no Slave devices populated or if the power-on is
+	 * delayed or dependent on a power switch, the Master will
+	 * remain active and prevent its parent from suspending.
+	 *
+	 * Conditionally force the pm_runtime core to re-evaluate the
+	 * Master status in the absence of any Slave activity. A quirk
+	 * is provided to e.g. deal with Slaves that may be powered on
+	 * with a delay. A more complete solution would require the
+	 * definition of Master properties.
+	 */
+	if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE))
+		pm_runtime_idle(dev);
+
+	sdw->startup_done = true;
+	return 0;
+
+err_power_up:
+	sdw_intel_link_power_down(sdw);
+err_init:
+	return ret;
+}
+
+static void intel_link_remove(struct auxiliary_device *auxdev)
+{
+	struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+
+	/*
+	 * Since pm_runtime is already disabled, we don't decrease
+	 * the refcount when the clock_stop_quirk is
+	 * SDW_INTEL_CLK_STOP_NOT_ALLOWED
+	 */
+	if (!bus->prop.hw_disabled) {
+		sdw_intel_debugfs_exit(sdw);
+		sdw_cdns_enable_interrupt(cdns, false);
+	}
+	sdw_bus_master_delete(bus);
+}
+
+int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
+{
+	struct device *dev = &auxdev->dev;
+	struct sdw_intel *sdw;
+	struct sdw_bus *bus;
+
+	sdw = auxiliary_get_drvdata(auxdev);
+	bus = &sdw->cdns.bus;
+
+	if (bus->prop.hw_disabled || !sdw->startup_done) {
+		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
+			bus->link_id);
+		return 0;
+	}
+
+	if (!sdw_intel_shim_check_wake(sdw))
+		return 0;
+
+	/* disable WAKEEN interrupt ASAP to prevent interrupt flood */
+	sdw_intel_shim_wake(sdw, false);
+
+	/*
+	 * resume the Master, which will generate a bus reset and result in
+	 * Slaves re-attaching and be re-enumerated. The SoundWire physical
+	 * device which generated the wake will trigger an interrupt, which
+	 * will in turn cause the corresponding Linux Slave device to be
+	 * resumed and the Slave codec driver to check the status.
+	 */
+	pm_request_resume(dev);
+
+	return 0;
+}
+
+/*
+ * PM calls
+ */
+
+static int intel_resume_child_device(struct device *dev, void *data)
+{
+	int ret;
+	struct sdw_slave *slave = dev_to_sdw_dev(dev);
+
+	if (!slave->probed) {
+		dev_dbg(dev, "skipping device, no probed driver\n");
+		return 0;
+	}
+	if (!slave->dev_num_sticky) {
+		dev_dbg(dev, "skipping device, never detected on bus\n");
+		return 0;
+	}
+
+	ret = pm_request_resume(dev);
+	if (ret < 0)
+		dev_err(dev, "%s: pm_request_resume failed: %d\n", __func__, ret);
+
+	return ret;
+}
+
+static int __maybe_unused intel_pm_prepare(struct device *dev)
+{
+	struct sdw_cdns *cdns = dev_get_drvdata(dev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+	u32 clock_stop_quirks;
+	int ret;
+
+	if (bus->prop.hw_disabled || !sdw->startup_done) {
+		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
+			bus->link_id);
+		return 0;
+	}
+
+	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
+
+	if (pm_runtime_suspended(dev) &&
+	    pm_runtime_suspended(dev->parent) &&
+	    ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
+	     !clock_stop_quirks)) {
+		/*
+		 * if we've enabled clock stop, and the parent is suspended, the SHIM registers
+		 * are not accessible and the shim wake cannot be disabled.
+		 * The only solution is to resume the entire bus to full power
+		 */
+
+		/*
+		 * If any operation in this block fails, we keep going since we don't want
+		 * to prevent system suspend from happening and errors should be recoverable
+		 * on resume.
+		 */
+
+		/*
+		 * first resume the device for this link. This will also by construction
+		 * resume the PCI parent device.
+		 */
+		ret = pm_request_resume(dev);
+		if (ret < 0) {
+			dev_err(dev, "%s: pm_request_resume failed: %d\n", __func__, ret);
+			return 0;
+		}
+
+		/*
+		 * Continue resuming the entire bus (parent + child devices) to exit
+		 * the clock stop mode. If there are no devices connected on this link
+		 * this is a no-op.
+		 * The resume to full power could have been implemented with a .prepare
+		 * step in SoundWire codec drivers. This would however require a lot
+		 * of code to handle an Intel-specific corner case. It is simpler in
+		 * practice to add a loop at the link level.
+		 */
+		ret = device_for_each_child(bus->dev, NULL, intel_resume_child_device);
+
+		if (ret < 0)
+			dev_err(dev, "%s: intel_resume_child_device failed: %d\n", __func__, ret);
+	}
+
+	return 0;
+}
+
+static int __maybe_unused intel_suspend(struct device *dev)
+{
+	struct sdw_cdns *cdns = dev_get_drvdata(dev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+	u32 clock_stop_quirks;
+	int ret;
+
+	if (bus->prop.hw_disabled || !sdw->startup_done) {
+		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
+			bus->link_id);
+		return 0;
+	}
+
+	if (pm_runtime_suspended(dev)) {
+		dev_dbg(dev, "pm_runtime status: suspended\n");
+
+		clock_stop_quirks = sdw->link_res->clock_stop_quirks;
+
+		if ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
+		    !clock_stop_quirks) {
+
+			if (pm_runtime_suspended(dev->parent)) {
+				/*
+				 * paranoia check: this should not happen with the .prepare
+				 * resume to full power
+				 */
+				dev_err(dev, "%s: invalid config: parent is suspended\n", __func__);
+			} else {
+				sdw_intel_shim_wake(sdw, false);
+			}
+		}
+
+		return 0;
+	}
+
+	ret = sdw_intel_stop_bus(sdw, false);
+	if (ret < 0) {
+		dev_err(dev, "%s: cannot stop bus: %d\n", __func__, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused intel_suspend_runtime(struct device *dev)
+{
+	struct sdw_cdns *cdns = dev_get_drvdata(dev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+	u32 clock_stop_quirks;
+	int ret;
+
+	if (bus->prop.hw_disabled || !sdw->startup_done) {
+		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
+			bus->link_id);
+		return 0;
+	}
+
+	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
+
+	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
+		ret = sdw_intel_stop_bus(sdw, false);
+		if (ret < 0) {
+			dev_err(dev, "%s: cannot stop bus during teardown: %d\n",
+				__func__, ret);
+			return ret;
+		}
+	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || !clock_stop_quirks) {
+		ret = sdw_intel_stop_bus(sdw, true);
+		if (ret < 0) {
+			dev_err(dev, "%s: cannot stop bus during clock_stop: %d\n",
+				__func__, ret);
+			return ret;
+		}
+	} else {
+		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
+			__func__, clock_stop_quirks);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int __maybe_unused intel_resume(struct device *dev)
+{
+	struct sdw_cdns *cdns = dev_get_drvdata(dev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+	int link_flags;
+	int ret;
+
+	if (bus->prop.hw_disabled || !sdw->startup_done) {
+		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
+			bus->link_id);
+		return 0;
+	}
+
+	link_flags = md_flags >> (bus->link_id * 8);
+
+	if (pm_runtime_suspended(dev)) {
+		dev_dbg(dev, "pm_runtime status was suspended, forcing active\n");
+
+		/* follow required sequence from runtime_pm.rst */
+		pm_runtime_disable(dev);
+		pm_runtime_set_active(dev);
+		pm_runtime_mark_last_busy(dev);
+		pm_runtime_enable(dev);
+
+		link_flags = md_flags >> (bus->link_id * 8);
+
+		if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE))
+			pm_runtime_idle(dev);
+	}
+
+	ret = sdw_intel_link_power_up(sdw);
+	if (ret) {
+		dev_err(dev, "%s failed: %d\n", __func__, ret);
+		return ret;
+	}
+
+	/*
+	 * make sure all Slaves are tagged as UNATTACHED and provide
+	 * reason for reinitialization
+	 */
+	sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
+
+	ret = sdw_intel_start_bus(sdw);
+	if (ret < 0) {
+		dev_err(dev, "cannot start bus during resume\n");
+		sdw_intel_link_power_down(sdw);
+		return ret;
+	}
+
+	/*
+	 * after system resume, the pm_runtime suspend() may kick in
+	 * during the enumeration, before any children device force the
+	 * master device to remain active.  Using pm_runtime_get()
+	 * routines is not really possible, since it'd prevent the
+	 * master from suspending.
+	 * A reasonable compromise is to update the pm_runtime
+	 * counters and delay the pm_runtime suspend by several
+	 * seconds, by when all enumeration should be complete.
+	 */
+	pm_runtime_mark_last_busy(dev);
+
+	return 0;
+}
+
+static int __maybe_unused intel_resume_runtime(struct device *dev)
+{
+	struct sdw_cdns *cdns = dev_get_drvdata(dev);
+	struct sdw_intel *sdw = cdns_to_intel(cdns);
+	struct sdw_bus *bus = &cdns->bus;
+	u32 clock_stop_quirks;
+	int ret;
+
+	if (bus->prop.hw_disabled || !sdw->startup_done) {
+		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
+			bus->link_id);
+		return 0;
+	}
+
+	/* unconditionally disable WAKEEN interrupt */
+	sdw_intel_shim_wake(sdw, false);
+
+	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
+
+	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
+		ret = sdw_intel_link_power_up(sdw);
+		if (ret) {
+			dev_err(dev, "%s: power_up failed after teardown: %d\n", __func__, ret);
+			return ret;
+		}
+
+		/*
+		 * make sure all Slaves are tagged as UNATTACHED and provide
+		 * reason for reinitialization
+		 */
+		sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
+
+		ret = sdw_intel_start_bus(sdw);
+		if (ret < 0) {
+			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
+			sdw_intel_link_power_down(sdw);
+			return ret;
+		}
+
+	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
+		ret = sdw_intel_link_power_up(sdw);
+		if (ret) {
+			dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
+			return ret;
+		}
+
+		ret = sdw_intel_start_bus_after_reset(sdw);
+		if (ret < 0) {
+			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
+			sdw_intel_link_power_down(sdw);
+			return ret;
+		}
+	} else if (!clock_stop_quirks) {
+
+		sdw_intel_check_clock_stop(sdw);
+
+		ret = sdw_intel_link_power_up(sdw);
+		if (ret) {
+			dev_err(dev, "%s: power_up failed: %d\n", __func__, ret);
+			return ret;
+		}
+
+		ret = sdw_intel_start_bus_after_clock_stop(sdw);
+		if (ret < 0) {
+			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
+			sdw_intel_link_power_down(sdw);
+			return ret;
+		}
+	} else {
+		dev_err(dev, "%s: clock_stop_quirks %x unsupported\n",
+			__func__, clock_stop_quirks);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct dev_pm_ops intel_pm = {
+	.prepare = intel_pm_prepare,
+	SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
+	SET_RUNTIME_PM_OPS(intel_suspend_runtime, intel_resume_runtime, NULL)
+};
+
+static const struct auxiliary_device_id intel_link_id_table[] = {
+	{ .name = "soundwire_intel.link" },
+	{},
+};
+MODULE_DEVICE_TABLE(auxiliary, intel_link_id_table);
+
+static struct auxiliary_driver sdw_intel_drv = {
+	.probe = intel_link_probe,
+	.remove = intel_link_remove,
+	.driver = {
+		/* auxiliary_driver_register() sets .name to be the modname */
+		.pm = &intel_pm,
+	},
+	.id_table = intel_link_id_table
+};
+module_auxiliary_driver(sdw_intel_drv);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Intel Soundwire Link Driver");
diff --git a/drivers/soundwire/intel_auxdevice.h b/drivers/soundwire/intel_auxdevice.h
new file mode 100644
index 000000000000..a00ecde95563
--- /dev/null
+++ b/drivers/soundwire/intel_auxdevice.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
+/* Copyright(c) 2015-2022 Intel Corporation. */
+
+#ifndef __SDW_INTEL_AUXDEVICE_H
+#define __SDW_INTEL_AUXDEVICE_H
+
+int intel_link_startup(struct auxiliary_device *auxdev);
+int intel_link_process_wakeen_event(struct auxiliary_device *auxdev);
+
+struct sdw_intel_link_dev {
+	struct auxiliary_device auxdev;
+	struct sdw_intel_link_res link_res;
+};
+
+#define auxiliary_dev_to_sdw_intel_link_dev(auxiliary_dev) \
+	container_of(auxiliary_dev, struct sdw_intel_link_dev, auxdev)
+
+#endif /* __SDW_INTEL_AUXDEVICE_H */
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 1e6d74b3e773..b3a8db7c3b77 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -17,6 +17,7 @@
 #include <linux/soundwire/sdw_intel.h>
 #include "cadence_master.h"
 #include "intel.h"
+#include "intel_auxdevice.h"
 
 static void intel_link_dev_release(struct device *dev)
 {
-- 
2.25.1

RE: [PATCH 7/7] soundwire: intel: split auxdevice to different file

[Liao, Bard]

> -----Original Message-----
> From: Bard Liao <yung-chuan.liao@linux.intel.com>
> Sent: Friday, November 11, 2022 9:32 AM
> To: alsa-devel@alsa-project.org; vkoul@kernel.org
> Cc: vinod.koul@linaro.org; linux-kernel@vger.kernel.org; pierre-
> louis.bossart@linux.intel.com; Liao, Bard <bard.liao@intel.com>
> Subject: [PATCH 7/7] soundwire: intel: split auxdevice to different file
> 
> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> 
> The auxdevice layer is completely generic, it should be split from
> intel.c which is only geared to the 'cnl' hw_ops now.
> 
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Reviewed-by: Rander Wang <rander.wang@intel.com>
> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Hi Vinod,

Note that "soundwire: intel: Initialize clock stop timeout" which is in
your fixes branch, but not in your next branch is needed before applying
this patch.

Re: [PATCH 0/7] soundwire: intel: introduce hw_ops and move auxdevice handling to dedicated file

[Vinod Koul]

On 11-11-22, 09:31, Bard Liao wrote:
> This series adds yet another set of cleanups
> a) all the helpers are now exposed as hw_ops callbacks
> b) the auxiliary device code is now completely generic.
> 
> This will allow for easier introduction of new hw_ops implementations in
> the future without throwing away all the goodness of the auxiliary device
> handling. Since there will be a tighter coupling with HDaudio, it's likely
> that future hw_ops are implemented in the SOF driver directly.

Applied, thanks

-- 
~Vinod