Merge tag 'soundwire-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire

Pull soundwire updates from Vinod Koul:
 "Updates for Intel, Cadence and Qualcomm drivers:

   - another round of Intel driver cleanup to prepare for future code
     reorg which is expected in next cycle (Pierre-Louis Bossart)

   - bus unattach notifications processing during re-enumeration along
     with Cadence driver updates for this (Richard Fitzgerald)

   - Qualcomm driver updates to handle device0 status (Srinivas
     Kandagatla)"

* tag 'soundwire-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire: (42 commits)
  soundwire: intel: add helper to stop bus
  soundwire: intel: introduce helpers to start bus
  soundwire: intel: introduce intel_shim_check_wake() helper
  soundwire: intel: simplify read ops assignment
  soundwire: intel: remove intel_init() wrapper
  soundwire: intel: move shim initialization before power up/down
  soundwire: intel: remove clock_stop parameter in intel_shim_init()
  soundwire: intel: move all PDI initialization under intel_register_dai()
  soundwire: intel: move DAI registration and debugfs init earlier
  soundwire: intel: simplify flow and use devm_ for DAI registration
  soundwire: intel: fix error handling on dai registration issues
  soundwire: cadence: Simplify error paths in cdns_xfer_msg()
  soundwire: cadence: Fix error check in cdns_xfer_msg()
  soundwire: cadence: Write to correct address for each FIFO chunk
  soundwire: bus: Fix wrong port number in sdw_handle_slave_alerts()
  soundwire: qcom: do not send status of device 0 during alert
  soundwire: qcom: update status from device id 1
  soundwire: cadence: Don't overwrite msg->buf during write commands
  soundwire: bus: Don't exit early if no device IDs were programmed
  soundwire: cadence: Fix lost ATTACHED interrupts when enumerating
  ...

drivers/soundwire/bus.c

@@ -11,11 +11,12 @@
 #include "bus.h"
 #include "sysfs_local.h"
 
-static DEFINE_IDA(sdw_ida);
+static DEFINE_IDA(sdw_bus_ida);
+static DEFINE_IDA(sdw_peripheral_ida);
 
 static int sdw_get_id(struct sdw_bus *bus)
 {
-	int rc = ida_alloc(&sdw_ida, GFP_KERNEL);
+	int rc = ida_alloc(&sdw_bus_ida, GFP_KERNEL);
 
 	if (rc < 0)
 		return rc;
@@ -75,7 +76,6 @@ int sdw_bus_master_add(struct sdw_bus *bus, struct device *parent,
 
 	/*
 	 * Initialize multi_link flag
-	 * TODO: populate this flag by reading property from FW node
 	 */
 	bus->multi_link = false;
 	if (bus->ops->read_prop) {
@@ -157,9 +157,11 @@ static int sdw_delete_slave(struct device *dev, void *data)
 
 	mutex_lock(&bus->bus_lock);
 
-	if (slave->dev_num) /* clear dev_num if assigned */
+	if (slave->dev_num) { /* clear dev_num if assigned */
 		clear_bit(slave->dev_num, bus->assigned);
-
+		if (bus->dev_num_ida_min)
+			ida_free(&sdw_peripheral_ida, slave->dev_num);
+	}
 	list_del_init(&slave->node);
 	mutex_unlock(&bus->bus_lock);
 
@@ -179,7 +181,7 @@ void sdw_bus_master_delete(struct sdw_bus *bus)
 	sdw_master_device_del(bus);
 
 	sdw_bus_debugfs_exit(bus);
-	ida_free(&sdw_ida, bus->id);
+	ida_free(&sdw_bus_ida, bus->id);
 }
 EXPORT_SYMBOL(sdw_bus_master_delete);
 
@@ -671,10 +673,18 @@ static int sdw_get_device_num(struct sdw_slave *slave)
 {
 	int bit;
 
-	bit = find_first_zero_bit(slave->bus->assigned, SDW_MAX_DEVICES);
-	if (bit == SDW_MAX_DEVICES) {
-		bit = -ENODEV;
-		goto err;
+	if (slave->bus->dev_num_ida_min) {
+		bit = ida_alloc_range(&sdw_peripheral_ida,
+				      slave->bus->dev_num_ida_min, SDW_MAX_DEVICES,
+				      GFP_KERNEL);
+		if (bit < 0)
+			goto err;
+	} else {
+		bit = find_first_zero_bit(slave->bus->assigned, SDW_MAX_DEVICES);
+		if (bit == SDW_MAX_DEVICES) {
+			bit = -ENODEV;
+			goto err;
+		}
 	}
 
 	/*
@@ -751,7 +761,7 @@ void sdw_extract_slave_id(struct sdw_bus *bus,
 }
 EXPORT_SYMBOL(sdw_extract_slave_id);
 
-static int sdw_program_device_num(struct sdw_bus *bus)
+static int sdw_program_device_num(struct sdw_bus *bus, bool *programmed)
 {
 	u8 buf[SDW_NUM_DEV_ID_REGISTERS] = {0};
 	struct sdw_slave *slave, *_s;
@@ -761,6 +771,8 @@ static int sdw_program_device_num(struct sdw_bus *bus)
 	int count = 0, ret;
 	u64 addr;
 
+	*programmed = false;
+
 	/* No Slave, so use raw xfer api */
 	ret = sdw_fill_msg(&msg, NULL, SDW_SCP_DEVID_0,
 			   SDW_NUM_DEV_ID_REGISTERS, 0, SDW_MSG_FLAG_READ, buf);
@@ -795,6 +807,16 @@ static int sdw_program_device_num(struct sdw_bus *bus)
 			if (sdw_compare_devid(slave, id) == 0) {
 				found = true;
 
+				/*
+				 * To prevent skipping state-machine stages don't
+				 * program a device until we've seen it UNATTACH.
+				 * Must return here because no other device on #0
+				 * can be detected until this one has been
+				 * assigned a device ID.
+				 */
+				if (slave->status != SDW_SLAVE_UNATTACHED)
+					return 0;
+
 				/*
 				 * Assign a new dev_num to this Slave and
 				 * not mark it present. It will be marked
@@ -809,6 +831,8 @@ static int sdw_program_device_num(struct sdw_bus *bus)
 					return ret;
 				}
 
+				*programmed = true;
+
 				break;
 			}
 		}
@@ -848,13 +872,13 @@ static void sdw_modify_slave_status(struct sdw_slave *slave,
 	mutex_lock(&bus->bus_lock);
 
 	dev_vdbg(bus->dev,
-		 "%s: changing status slave %d status %d new status %d\n",
-		 __func__, slave->dev_num, slave->status, status);
+		 "changing status slave %d status %d new status %d\n",
+		 slave->dev_num, slave->status, status);
 
 	if (status == SDW_SLAVE_UNATTACHED) {
 		dev_dbg(&slave->dev,
-			"%s: initializing enumeration and init completion for Slave %d\n",
-			__func__, slave->dev_num);
+			"initializing enumeration and init completion for Slave %d\n",
+			slave->dev_num);
 
 		init_completion(&slave->enumeration_complete);
 		init_completion(&slave->initialization_complete);
@@ -862,8 +886,8 @@ static void sdw_modify_slave_status(struct sdw_slave *slave,
 	} else if ((status == SDW_SLAVE_ATTACHED) &&
 		   (slave->status == SDW_SLAVE_UNATTACHED)) {
 		dev_dbg(&slave->dev,
-			"%s: signaling enumeration completion for Slave %d\n",
-			__func__, slave->dev_num);
+			"signaling enumeration completion for Slave %d\n",
+			slave->dev_num);
 
 		complete(&slave->enumeration_complete);
 	}
@@ -1630,7 +1654,7 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 			port = buf2[0] & SDW_SCP_INTSTAT2_PORT4_10;
 			for_each_set_bit(bit, &port, 8) {
 				/* scp2 ports start from 4 */
-				port_num = bit + 3;
+				port_num = bit + 4;
 				sdw_handle_port_interrupt(slave,
 						port_num,
 						&port_status[port_num]);
@@ -1642,7 +1666,7 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 			port = buf2[1] & SDW_SCP_INTSTAT3_PORT11_14;
 			for_each_set_bit(bit, &port, 8) {
 				/* scp3 ports start from 11 */
-				port_num = bit + 10;
+				port_num = bit + 11;
 				sdw_handle_port_interrupt(slave,
 						port_num,
 						&port_status[port_num]);
@@ -1768,7 +1792,7 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 {
 	enum sdw_slave_status prev_status;
 	struct sdw_slave *slave;
-	bool attached_initializing;
+	bool attached_initializing, id_programmed;
 	int i, ret = 0;
 
 	/* first check if any Slaves fell off the bus */
@@ -1789,19 +1813,33 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 			dev_warn(&slave->dev, "Slave %d state check1: UNATTACHED, status was %d\n",
 				 i, slave->status);
 			sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED);
+
+			/* Ensure driver knows that peripheral unattached */
+			ret = sdw_update_slave_status(slave, status[i]);
+			if (ret < 0)
+				dev_warn(&slave->dev, "Update Slave status failed:%d\n", ret);
 		}
 	}
 
 	if (status[0] == SDW_SLAVE_ATTACHED) {
 		dev_dbg(bus->dev, "Slave attached, programming device number\n");
-		ret = sdw_program_device_num(bus);
-		if (ret < 0)
-			dev_err(bus->dev, "Slave attach failed: %d\n", ret);
+
 		/*
-		 * programming a device number will have side effects,
-		 * so we deal with other devices at a later time
+		 * Programming a device number will have side effects,
+		 * so we deal with other devices at a later time.
+		 * This relies on those devices reporting ATTACHED, which will
+		 * trigger another call to this function. This will only
+		 * happen if at least one device ID was programmed.
+		 * Error returns from sdw_program_device_num() are currently
+		 * ignored because there's no useful recovery that can be done.
+		 * Returning the error here could result in the current status
+		 * of other devices not being handled, because if no device IDs
+		 * were programmed there's nothing to guarantee a status change
+		 * to trigger another call to this function.
 		 */
-		return ret;
+		sdw_program_device_num(bus, &id_programmed);
+		if (id_programmed)
+			return 0;
 	}
 
 	/* Continue to check other slave statuses */
@@ -1870,8 +1908,8 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 				"Update Slave status failed:%d\n", ret);
 		if (attached_initializing) {
 			dev_dbg(&slave->dev,
-				"%s: signaling initialization completion for Slave %d\n",
-				__func__, slave->dev_num);
+				"signaling initialization completion for Slave %d\n",
+				slave->dev_num);
 
 			complete(&slave->initialization_complete);
 

drivers/soundwire/cadence_master.c

@@ -544,9 +544,12 @@ cdns_fill_msg_resp(struct sdw_cdns *cdns,
 		return SDW_CMD_IGNORED;
 	}
 
-	/* fill response */
-	for (i = 0; i < count; i++)
-		msg->buf[i + offset] = FIELD_GET(CDNS_MCP_RESP_RDATA, cdns->response_buf[i]);
+	if (msg->flags == SDW_MSG_FLAG_READ) {
+		/* fill response */
+		for (i = 0; i < count; i++)
+			msg->buf[i + offset] = FIELD_GET(CDNS_MCP_RESP_RDATA,
+							 cdns->response_buf[i]);
+	}
 
 	return SDW_CMD_OK;
 }
@@ -566,7 +569,7 @@ _cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd,
 	}
 
 	base = CDNS_MCP_CMD_BASE;
-	addr = msg->addr;
+	addr = msg->addr + offset;
 
 	for (i = 0; i < count; i++) {
 		data = FIELD_PREP(CDNS_MCP_CMD_DEV_ADDR, msg->dev_num);
@@ -705,18 +708,15 @@ cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
 	for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) {
 		ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
 				     CDNS_MCP_CMD_LEN, false);
-		if (ret < 0)
-			goto exit;
+		if (ret != SDW_CMD_OK)
+			return ret;
 	}
 
 	if (!(msg->len % CDNS_MCP_CMD_LEN))
-		goto exit;
-
-	ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
-			     msg->len % CDNS_MCP_CMD_LEN, false);
+		return SDW_CMD_OK;
 
-exit:
-	return ret;
+	return _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
+			      msg->len % CDNS_MCP_CMD_LEN, false);
 }
 EXPORT_SYMBOL(cdns_xfer_msg);
 
@@ -790,6 +790,7 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns,
 	enum sdw_slave_status status[SDW_MAX_DEVICES + 1];
 	bool is_slave = false;
 	u32 mask;
+	u32 val;
 	int i, set_status;
 
 	memset(status, 0, sizeof(status));
@@ -797,41 +798,38 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns,
 	for (i = 0; i <= SDW_MAX_DEVICES; i++) {
 		mask = (slave_intstat >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) &
 			CDNS_MCP_SLAVE_STATUS_BITS;
-		if (!mask)
-			continue;
 
-		is_slave = true;
 		set_status = 0;
 
-		if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) {
-			status[i] = SDW_SLAVE_RESERVED;
-			set_status++;
-		}
-
-		if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) {
-			status[i] = SDW_SLAVE_ATTACHED;
-			set_status++;
-		}
+		if (mask) {
+			is_slave = true;
 
-		if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) {
-			status[i] = SDW_SLAVE_ALERT;
-			set_status++;
-		}
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) {
+				status[i] = SDW_SLAVE_RESERVED;
+				set_status++;
+			}
 
-		if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) {
-			status[i] = SDW_SLAVE_UNATTACHED;
-			set_status++;
-		}
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) {
+				status[i] = SDW_SLAVE_ATTACHED;
+				set_status++;
+			}
 
-		/* first check if Slave reported multiple status */
-		if (set_status > 1) {
-			u32 val;
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) {
+				status[i] = SDW_SLAVE_ALERT;
+				set_status++;
+			}
 
-			dev_warn_ratelimited(cdns->dev,
-					     "Slave %d reported multiple Status: %d\n",
-					     i, mask);
+			if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) {
+				status[i] = SDW_SLAVE_UNATTACHED;
+				set_status++;
+			}
+		}
 
-			/* check latest status extracted from PING commands */
+		/*
+		 * check that there was a single reported Slave status and when
+		 * there is not use the latest status extracted from PING commands
+		 */
+		if (set_status != 1) {
 			val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
 			val >>= (i * 2);
 
@@ -850,11 +848,6 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns,
 				status[i] = SDW_SLAVE_RESERVED;
 				break;
 			}
-
-			dev_warn_ratelimited(cdns->dev,
-					     "Slave %d status updated to %d\n",
-					     i, status[i]);
-
 		}
 	}
 
@@ -969,9 +962,22 @@ static void cdns_update_slave_status_work(struct work_struct *work)
 	u32 device0_status;
 	int retry_count = 0;
 
+	/*
+	 * Clear main interrupt first so we don't lose any assertions
+	 * that happen during this function.
+	 */
+	cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK);
+
 	slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
 	slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
 
+	/*
+	 * Clear the bits before handling so we don't lose any
+	 * bits that re-assert.
+	 */
+	cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0);
+	cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1);
+
 	/* combine the two status */
 	slave_intstat = ((u64)slave1 << 32) | slave0;
 
@@ -979,8 +985,6 @@ static void cdns_update_slave_status_work(struct work_struct *work)
 
 update_status:
 	cdns_update_slave_status(cdns, slave_intstat);
-	cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0);
-	cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1);
 
 	/*
 	 * When there is more than one peripheral per link, it's
@@ -997,6 +1001,11 @@ static void cdns_update_slave_status_work(struct work_struct *work)
 	 * attention with PING commands. There is no need to check for
 	 * ALERTS since they are not allowed until a non-zero
 	 * device_number is assigned.
+	 *
+	 * Do not clear the INTSTAT0/1. While looping to enumerate devices on
+	 * #0 there could be status changes on other devices - these must
+	 * be kept in the INTSTAT so they can be handled when all #0 devices
+	 * have been handled.
 	 */
 
 	device0_status = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
@@ -1016,8 +1025,7 @@ static void cdns_update_slave_status_work(struct work_struct *work)
 		}
 	}
 
-	/* clear and unmask Slave interrupt now */
-	cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK);
+	/* unmask Slave interrupt now */
 	cdns_updatel(cdns, CDNS_MCP_INTMASK,
 		     CDNS_MCP_INT_SLAVE_MASK, CDNS_MCP_INT_SLAVE_MASK);
 

drivers/soundwire/dmi-quirks.c

@@ -55,7 +55,26 @@ static const struct adr_remap dell_sku_0A3E[] = {
 	{}
 };
 
+/*
+ * The HP Omen 16-k0005TX does not expose the correct version of RT711 on link0
+ * and does not expose a RT1316 on link3
+ */
+static const struct adr_remap hp_omen_16[] = {
+	/* rt711-sdca on link0 */
+	{
+		0x000020025d071100ull,
+		0x000030025d071101ull
+	},
+	/* rt1316-sdca on link3 */
+	{
+		0x000120025d071100ull,
+		0x000330025d131601ull
+	},
+	{}
+};
+
 static const struct dmi_system_id adr_remap_quirk_table[] = {
+	/* TGL devices */
 	{
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
@@ -78,6 +97,14 @@ static const struct dmi_system_id adr_remap_quirk_table[] = {
 		},
 		.driver_data = (void *)dell_sku_0A3E,
 	},
+	/* ADL devices */
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "OMEN by HP Gaming Laptop 16-k0xxx"),
+		},
+		.driver_data = (void *)hp_omen_16,
+	},
 	{}
 };
 

drivers/soundwire/intel.c

@@ -22,6 +22,9 @@
 #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
 
@@ -135,7 +138,7 @@ static int intel_reg_show(struct seq_file *s_file, void *data)
 	if (!buf)
 		return -ENOMEM;
 
-	links = intel_readl(s, SDW_SHIM_LCAP) & GENMASK(2, 0);
+	links = intel_readl(s, SDW_SHIM_LCAP) & SDW_SHIM_LCAP_LCOUNT_MASK;
 
 	ret = scnprintf(buf, RD_BUF, "Register  Value\n");
 	ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");
@@ -167,9 +170,8 @@ static int intel_reg_show(struct seq_file *s_file, void *data)
 			ret += intel_sprintf(s, false, buf, ret,
 					SDW_SHIM_PCMSYCHC(i, j));
 		}
-		ret += scnprintf(buf + ret, RD_BUF - ret, "\n PDMSCAP, IOCTL, CTMCTL\n");
+		ret += scnprintf(buf + ret, RD_BUF - ret, "\n IOCTL, CTMCTL\n");
 
-		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PDMSCAP(i));
 		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i));
 		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i));
 	}
@@ -258,86 +260,6 @@ static void intel_debugfs_exit(struct sdw_intel *sdw) {}
 /*
  * shim ops
  */
-
-static int intel_link_power_up(struct sdw_intel *sdw)
-{
-	unsigned int link_id = sdw->instance;
-	void __iomem *shim = sdw->link_res->shim;
-	u32 *shim_mask = sdw->link_res->shim_mask;
-	struct sdw_bus *bus = &sdw->cdns.bus;
-	struct sdw_master_prop *prop = &bus->prop;
-	u32 spa_mask, cpa_mask;
-	u32 link_control;
-	int ret = 0;
-	u32 syncprd;
-	u32 sync_reg;
-
-	mutex_lock(sdw->link_res->shim_lock);
-
-	/*
-	 * The hardware relies on an internal counter, typically 4kHz,
-	 * to generate the SoundWire SSP - which defines a 'safe'
-	 * synchronization point between commands and audio transport
-	 * and allows for multi link synchronization. The SYNCPRD value
-	 * is only dependent on the oscillator clock provided to
-	 * the IP, so adjust based on _DSD properties reported in DSDT
-	 * tables. The values reported are based on either 24MHz
-	 * (CNL/CML) or 38.4 MHz (ICL/TGL+).
-	 */
-	if (prop->mclk_freq % 6000000)
-		syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
-	else
-		syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24;
-
-	if (!*shim_mask) {
-		dev_dbg(sdw->cdns.dev, "%s: powering up all links\n", __func__);
-
-		/* we first need to program the SyncPRD/CPU registers */
-		dev_dbg(sdw->cdns.dev,
-			"%s: first link up, programming SYNCPRD\n", __func__);
-
-		/* set SyncPRD period */
-		sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
-		u32p_replace_bits(&sync_reg, syncprd, SDW_SHIM_SYNC_SYNCPRD);
-
-		/* Set SyncCPU bit */
-		sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
-		intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
-
-		/* Link power up sequence */
-		link_control = intel_readl(shim, SDW_SHIM_LCTL);
-
-		/* only power-up enabled links */
-		spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, sdw->link_res->link_mask);
-		cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
-
-		link_control |=  spa_mask;
-
-		ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
-		if (ret < 0) {
-			dev_err(sdw->cdns.dev, "Failed to power up link: %d\n", ret);
-			goto out;
-		}
-
-		/* SyncCPU will change once link is active */
-		ret = intel_wait_bit(shim, SDW_SHIM_SYNC,
-				     SDW_SHIM_SYNC_SYNCCPU, 0);
-		if (ret < 0) {
-			dev_err(sdw->cdns.dev,
-				"Failed to set SHIM_SYNC: %d\n", ret);
-			goto out;
-		}
-	}
-
-	*shim_mask |= BIT(link_id);
-
-	sdw->cdns.link_up = true;
-out:
-	mutex_unlock(sdw->link_res->shim_lock);
-
-	return ret;
-}
-
 /* this needs to be called with shim_lock */
 static void intel_shim_glue_to_master_ip(struct sdw_intel *sdw)
 {
@@ -389,15 +311,13 @@ static void intel_shim_master_ip_to_glue(struct sdw_intel *sdw)
 	/* at this point Integration Glue has full control of the I/Os */
 }
 
-static int intel_shim_init(struct sdw_intel *sdw, bool clock_stop)
+/* this needs to be called with shim_lock */
+static void intel_shim_init(struct sdw_intel *sdw)
 {
 	void __iomem *shim = sdw->link_res->shim;
 	unsigned int link_id = sdw->instance;
-	int ret = 0;
 	u16 ioctl = 0, act = 0;
 
-	mutex_lock(sdw->link_res->shim_lock);
-
 	/* Initialize Shim */
 	ioctl |= SDW_SHIM_IOCTL_BKE;
 	intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
@@ -422,10 +342,17 @@ static int intel_shim_init(struct sdw_intel *sdw, bool clock_stop)
 	act |= SDW_SHIM_CTMCTL_DODS;
 	intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
 	usleep_range(10, 15);
+}
 
-	mutex_unlock(sdw->link_res->shim_lock);
+static int intel_shim_check_wake(struct sdw_intel *sdw)
+{
+	void __iomem *shim;
+	u16 wake_sts;
 
-	return ret;
+	shim = sdw->link_res->shim;
+	wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
+
+	return wake_sts & BIT(sdw->instance);
 }
 
 static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
@@ -454,6 +381,88 @@ static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
 	mutex_unlock(sdw->link_res->shim_lock);
 }
 
+static int intel_link_power_up(struct sdw_intel *sdw)
+{
+	unsigned int link_id = sdw->instance;
+	void __iomem *shim = sdw->link_res->shim;
+	u32 *shim_mask = sdw->link_res->shim_mask;
+	struct sdw_bus *bus = &sdw->cdns.bus;
+	struct sdw_master_prop *prop = &bus->prop;
+	u32 spa_mask, cpa_mask;
+	u32 link_control;
+	int ret = 0;
+	u32 syncprd;
+	u32 sync_reg;
+
+	mutex_lock(sdw->link_res->shim_lock);
+
+	/*
+	 * The hardware relies on an internal counter, typically 4kHz,
+	 * to generate the SoundWire SSP - which defines a 'safe'
+	 * synchronization point between commands and audio transport
+	 * and allows for multi link synchronization. The SYNCPRD value
+	 * is only dependent on the oscillator clock provided to
+	 * the IP, so adjust based on _DSD properties reported in DSDT
+	 * tables. The values reported are based on either 24MHz
+	 * (CNL/CML) or 38.4 MHz (ICL/TGL+).
+	 */
+	if (prop->mclk_freq % 6000000)
+		syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
+	else
+		syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24;
+
+	if (!*shim_mask) {
+		dev_dbg(sdw->cdns.dev, "powering up all links\n");
+
+		/* we first need to program the SyncPRD/CPU registers */
+		dev_dbg(sdw->cdns.dev,
+			"first link up, programming SYNCPRD\n");
+
+		/* set SyncPRD period */
+		sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
+		u32p_replace_bits(&sync_reg, syncprd, SDW_SHIM_SYNC_SYNCPRD);
+
+		/* Set SyncCPU bit */
+		sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
+		intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
+
+		/* Link power up sequence */
+		link_control = intel_readl(shim, SDW_SHIM_LCTL);
+
+		/* only power-up enabled links */
+		spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, sdw->link_res->link_mask);
+		cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
+
+		link_control |=  spa_mask;
+
+		ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
+		if (ret < 0) {
+			dev_err(sdw->cdns.dev, "Failed to power up link: %d\n", ret);
+			goto out;
+		}
+
+		/* SyncCPU will change once link is active */
+		ret = intel_wait_bit(shim, SDW_SHIM_SYNC,
+				     SDW_SHIM_SYNC_SYNCCPU, 0);
+		if (ret < 0) {
+			dev_err(sdw->cdns.dev,
+				"Failed to set SHIM_SYNC: %d\n", ret);
+			goto out;
+		}
+	}
+
+	*shim_mask |= BIT(link_id);
+
+	sdw->cdns.link_up = true;
+
+	intel_shim_init(sdw);
+
+out:
+	mutex_unlock(sdw->link_res->shim_lock);
+
+	return ret;
+}
+
 static int intel_link_power_down(struct sdw_intel *sdw)
 {
 	u32 link_control, spa_mask, cpa_mask;
@@ -476,7 +485,7 @@ static int intel_link_power_down(struct sdw_intel *sdw)
 
 	if (!*shim_mask) {
 
-		dev_dbg(sdw->cdns.dev, "%s: powering down all links\n", __func__);
+		dev_dbg(sdw->cdns.dev, "powering down all links\n");
 
 		/* Link power down sequence */
 		link_control = intel_readl(shim, SDW_SHIM_LCTL);
@@ -1169,11 +1178,20 @@ static int intel_create_dai(struct sdw_cdns *cdns,
 
 static int intel_register_dai(struct sdw_intel *sdw)
 {
+	struct sdw_cdns_stream_config config;
 	struct sdw_cdns *cdns = &sdw->cdns;
 	struct sdw_cdns_streams *stream;
 	struct snd_soc_dai_driver *dais;
 	int num_dai, ret, off = 0;
 
+	/* Read the PDI config and initialize cadence PDI */
+	intel_pdi_init(sdw, &config);
+	ret = sdw_cdns_pdi_init(cdns, config);
+	if (ret)
+		return ret;
+
+	intel_pdi_ch_update(sdw);
+
 	/* DAIs are created based on total number of PDIs supported */
 	num_dai = cdns->pcm.num_pdi;
 
@@ -1201,8 +1219,208 @@ static int intel_register_dai(struct sdw_intel *sdw)
 	if (ret)
 		return ret;
 
-	return snd_soc_register_component(cdns->dev, &dai_component,
-					  dais, num_dai);
+	return devm_snd_soc_register_component(cdns->dev, &dai_component,
+					       dais, num_dai);
+}
+
+static int intel_start_bus(struct sdw_intel *sdw)
+{
+	struct device *dev = sdw->cdns.dev;
+	struct sdw_cdns *cdns = &sdw->cdns;
+	struct sdw_bus *bus = &cdns->bus;
+	int ret;
+
+	ret = sdw_cdns_enable_interrupt(cdns, true);
+	if (ret < 0) {
+		dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
+		return ret;
+	}
+
+	/*
+	 * follow recommended programming flows to avoid timeouts when
+	 * gsync is enabled
+	 */
+	if (bus->multi_link)
+		intel_shim_sync_arm(sdw);
+
+	ret = sdw_cdns_init(cdns);
+	if (ret < 0) {
+		dev_err(dev, "%s: unable to initialize Cadence IP: %d\n", __func__, ret);
+		goto err_interrupt;
+	}
+
+	ret = sdw_cdns_exit_reset(cdns);
+	if (ret < 0) {
+		dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret);
+		goto err_interrupt;
+	}
+
+	if (bus->multi_link) {
+		ret = intel_shim_sync_go(sdw);
+		if (ret < 0) {
+			dev_err(dev, "%s: sync go failed: %d\n", __func__, ret);
+			goto err_interrupt;
+		}
+	}
+	sdw_cdns_check_self_clearing_bits(cdns, __func__,
+					  true, INTEL_MASTER_RESET_ITERATIONS);
+
+	return 0;
+
+err_interrupt:
+	sdw_cdns_enable_interrupt(cdns, false);
+	return ret;
+}
+
+static int intel_start_bus_after_reset(struct sdw_intel *sdw)
+{
+	struct device *dev = sdw->cdns.dev;
+	struct sdw_cdns *cdns = &sdw->cdns;
+	struct sdw_bus *bus = &cdns->bus;
+	bool clock_stop0;
+	int status;
+	int ret;
+
+	/*
+	 * An exception condition occurs for the CLK_STOP_BUS_RESET
+	 * case if one or more masters remain active. In this condition,
+	 * all the masters are powered on for they are in the same power
+	 * domain. Master can preserve its context for clock stop0, so
+	 * there is no need to clear slave status and reset bus.
+	 */
+	clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
+
+	if (!clock_stop0) {
+
+		/*
+		 * make sure all Slaves are tagged as UNATTACHED and
+		 * provide reason for reinitialization
+		 */
+
+		status = SDW_UNATTACH_REQUEST_MASTER_RESET;
+		sdw_clear_slave_status(bus, status);
+
+		ret = sdw_cdns_enable_interrupt(cdns, true);
+		if (ret < 0) {
+			dev_err(dev, "cannot enable interrupts during resume\n");
+			return ret;
+		}
+
+		/*
+		 * follow recommended programming flows to avoid
+		 * timeouts when gsync is enabled
+		 */
+		if (bus->multi_link)
+			intel_shim_sync_arm(sdw);
+
+		/*
+		 * Re-initialize the IP since it was powered-off
+		 */
+		sdw_cdns_init(&sdw->cdns);
+
+	} else {
+		ret = sdw_cdns_enable_interrupt(cdns, true);
+		if (ret < 0) {
+			dev_err(dev, "cannot enable interrupts during resume\n");
+			return ret;
+		}
+	}
+
+	ret = sdw_cdns_clock_restart(cdns, !clock_stop0);
+	if (ret < 0) {
+		dev_err(dev, "unable to restart clock during resume\n");
+		goto err_interrupt;
+	}
+
+	if (!clock_stop0) {
+		ret = sdw_cdns_exit_reset(cdns);
+		if (ret < 0) {
+			dev_err(dev, "unable to exit bus reset sequence during resume\n");
+			goto err_interrupt;
+		}
+
+		if (bus->multi_link) {
+			ret = intel_shim_sync_go(sdw);
+			if (ret < 0) {
+				dev_err(sdw->cdns.dev, "sync go failed during resume\n");
+				goto err_interrupt;
+			}
+		}
+	}
+	sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS);
+
+	return 0;
+
+err_interrupt:
+	sdw_cdns_enable_interrupt(cdns, false);
+	return ret;
+}
+
+static void intel_check_clock_stop(struct sdw_intel *sdw)
+{
+	struct device *dev = sdw->cdns.dev;
+	bool clock_stop0;
+
+	clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
+	if (!clock_stop0)
+		dev_err(dev, "%s: invalid configuration, clock was not stopped\n", __func__);
+}
+
+static int intel_start_bus_after_clock_stop(struct sdw_intel *sdw)
+{
+	struct device *dev = sdw->cdns.dev;
+	struct sdw_cdns *cdns = &sdw->cdns;
+	int ret;
+
+	ret = sdw_cdns_enable_interrupt(cdns, true);
+	if (ret < 0) {
+		dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
+		return ret;
+	}
+
+	ret = sdw_cdns_clock_restart(cdns, false);
+	if (ret < 0) {
+		dev_err(dev, "%s: unable to restart clock: %d\n", __func__, ret);
+		sdw_cdns_enable_interrupt(cdns, false);
+		return ret;
+	}
+
+	sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime no_quirks",
+					  true, INTEL_MASTER_RESET_ITERATIONS);
+
+	return 0;
+}
+
+static int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
+{
+	struct device *dev = sdw->cdns.dev;
+	struct sdw_cdns *cdns = &sdw->cdns;
+	bool wake_enable = false;
+	int ret;
+
+	if (clock_stop) {
+		ret = sdw_cdns_clock_stop(cdns, true);
+		if (ret < 0)
+			dev_err(dev, "%s: cannot stop clock: %d\n", __func__, ret);
+		else
+			wake_enable = true;
+	}
+
+	ret = sdw_cdns_enable_interrupt(cdns, false);
+	if (ret < 0) {
+		dev_err(dev, "%s: cannot disable interrupts: %d\n", __func__, ret);
+		return ret;
+	}
+
+	ret = intel_link_power_down(sdw);
+	if (ret) {
+		dev_err(dev, "%s: Link power down failed: %d\n", __func__, ret);
+		return ret;
+	}
+
+	intel_shim_wake(sdw, wake_enable);
+
+	return 0;
 }
 
 static int sdw_master_read_intel_prop(struct sdw_bus *bus)
@@ -1254,7 +1472,7 @@ static int intel_prop_read(struct sdw_bus *bus)
 }
 
 static struct sdw_master_ops sdw_intel_ops = {
-	.read_prop = sdw_master_read_prop,
+	.read_prop = intel_prop_read,
 	.override_adr = sdw_dmi_override_adr,
 	.xfer_msg = cdns_xfer_msg,
 	.xfer_msg_defer = cdns_xfer_msg_defer,
@@ -1265,20 +1483,6 @@ static struct sdw_master_ops sdw_intel_ops = {
 	.read_ping_status = cdns_read_ping_status,
 };
 
-static int intel_init(struct sdw_intel *sdw)
-{
-	bool clock_stop;
-
-	/* Initialize shim and controller */
-	intel_link_power_up(sdw);
-
-	clock_stop = sdw_cdns_is_clock_stop(&sdw->cdns);
-
-	intel_shim_init(sdw, clock_stop);
-
-	return 0;
-}
-
 /*
  * probe and init (aux_dev_id argument is required by function prototype but not used)
  */
@@ -1308,11 +1512,11 @@ static int intel_link_probe(struct auxiliary_device *auxdev,
 	cdns->msg_count = 0;
 
 	bus->link_id = auxdev->id;
+	bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN;
 
 	sdw_cdns_probe(cdns);
 
-	/* Set property read ops */
-	sdw_intel_ops.read_prop = intel_prop_read;
+	/* Set ops */
 	bus->ops = &sdw_intel_ops;
 
 	/* set driver data, accessed by snd_soc_dai_get_drvdata() */
@@ -1345,7 +1549,6 @@ static int intel_link_probe(struct auxiliary_device *auxdev,
 
 int intel_link_startup(struct auxiliary_device *auxdev)
 {
-	struct sdw_cdns_stream_config config;
 	struct device *dev = &auxdev->dev;
 	struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
@@ -1366,7 +1569,6 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK);
 	if (!multi_link) {
 		dev_dbg(dev, "Multi-link is disabled\n");
-		bus->multi_link = false;
 	} else {
 		/*
 		 * hardware-based synchronization is required regardless
@@ -1374,68 +1576,31 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 		 * synchronization is gated by gsync when the multi-master
 		 * mode is set.
 		 */
-		bus->multi_link = true;
 		bus->hw_sync_min_links = 1;
 	}
+	bus->multi_link = multi_link;
 
 	/* Initialize shim, controller */
-	ret = intel_init(sdw);
-	if (ret)
-		goto err_init;
-
-	/* Read the PDI config and initialize cadence PDI */
-	intel_pdi_init(sdw, &config);
-	ret = sdw_cdns_pdi_init(cdns, config);
+	ret = intel_link_power_up(sdw);
 	if (ret)
 		goto err_init;
 
-	intel_pdi_ch_update(sdw);
-
-	ret = sdw_cdns_enable_interrupt(cdns, true);
-	if (ret < 0) {
-		dev_err(dev, "cannot enable interrupts\n");
-		goto err_init;
-	}
-
-	/*
-	 * follow recommended programming flows to avoid timeouts when
-	 * gsync is enabled
-	 */
-	if (multi_link)
-		intel_shim_sync_arm(sdw);
-
-	ret = sdw_cdns_init(cdns);
-	if (ret < 0) {
-		dev_err(dev, "unable to initialize Cadence IP\n");
-		goto err_interrupt;
-	}
-
-	ret = sdw_cdns_exit_reset(cdns);
-	if (ret < 0) {
-		dev_err(dev, "unable to exit bus reset sequence\n");
-		goto err_interrupt;
-	}
-
-	if (multi_link) {
-		ret = intel_shim_sync_go(sdw);
-		if (ret < 0) {
-			dev_err(dev, "sync go failed: %d\n", ret);
-			goto err_interrupt;
-		}
-	}
-	sdw_cdns_check_self_clearing_bits(cdns, __func__,
-					  true, INTEL_MASTER_RESET_ITERATIONS);
-
 	/* Register DAIs */
 	ret = intel_register_dai(sdw);
 	if (ret) {
 		dev_err(dev, "DAI registration failed: %d\n", ret);
-		snd_soc_unregister_component(dev);
-		goto err_interrupt;
+		goto err_power_up;
 	}
 
 	intel_debugfs_init(sdw);
 
+	/* start bus */
+	ret = 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,
@@ -1480,15 +1645,14 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	sdw->startup_done = true;
 	return 0;
 
-err_interrupt:
-	sdw_cdns_enable_interrupt(cdns, false);
+err_power_up:
+	intel_link_power_down(sdw);
 err_init:
 	return ret;
 }
 
 static void intel_link_remove(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;
@@ -1501,7 +1665,6 @@ static void intel_link_remove(struct auxiliary_device *auxdev)
 	if (!bus->prop.hw_disabled) {
 		intel_debugfs_exit(sdw);
 		sdw_cdns_enable_interrupt(cdns, false);
-		snd_soc_unregister_component(dev);
 	}
 	sdw_bus_master_delete(bus);
 }
@@ -1511,8 +1674,6 @@ int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
 	struct device *dev = &auxdev->dev;
 	struct sdw_intel *sdw;
 	struct sdw_bus *bus;
-	void __iomem *shim;
-	u16 wake_sts;
 
 	sdw = auxiliary_get_drvdata(auxdev);
 	bus = &sdw->cdns.bus;
@@ -1523,10 +1684,7 @@ int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
 		return 0;
 	}
 
-	shim = sdw->link_res->shim;
-	wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
-
-	if (!(wake_sts & BIT(sdw->instance)))
+	if (!intel_shim_check_wake(sdw))
 		return 0;
 
 	/* disable WAKEEN interrupt ASAP to prevent interrupt flood */
@@ -1554,11 +1712,11 @@ static int intel_resume_child_device(struct device *dev, void *data)
 	struct sdw_slave *slave = dev_to_sdw_dev(dev);
 
 	if (!slave->probed) {
-		dev_dbg(dev, "%s: skipping device, no probed driver\n", __func__);
+		dev_dbg(dev, "skipping device, no probed driver\n");
 		return 0;
 	}
 	if (!slave->dev_num_sticky) {
-		dev_dbg(dev, "%s: skipping device, never detected on bus\n", __func__);
+		dev_dbg(dev, "skipping device, never detected on bus\n");
 		return 0;
 	}
 
@@ -1644,7 +1802,7 @@ static int __maybe_unused intel_suspend(struct device *dev)
 	}
 
 	if (pm_runtime_suspended(dev)) {
-		dev_dbg(dev, "%s: pm_runtime status: suspended\n", __func__);
+		dev_dbg(dev, "pm_runtime status: suspended\n");
 
 		clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
@@ -1665,20 +1823,12 @@ static int __maybe_unused intel_suspend(struct device *dev)
 		return 0;
 	}
 
-	ret = sdw_cdns_enable_interrupt(cdns, false);
+	ret = intel_stop_bus(sdw, false);
 	if (ret < 0) {
-		dev_err(dev, "cannot disable interrupts on suspend\n");
-		return ret;
-	}
-
-	ret = intel_link_power_down(sdw);
-	if (ret) {
-		dev_err(dev, "Link power down failed: %d\n", ret);
+		dev_err(dev, "%s: cannot stop bus: %d\n", __func__, ret);
 		return ret;
 	}
 
-	intel_shim_wake(sdw, false);
-
 	return 0;
 }
 
@@ -1699,44 +1849,19 @@ 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 = sdw_cdns_enable_interrupt(cdns, false);
+		ret = intel_stop_bus(sdw, false);
 		if (ret < 0) {
-			dev_err(dev, "cannot disable interrupts on suspend\n");
-			return ret;
-		}
-
-		ret = intel_link_power_down(sdw);
-		if (ret) {
-			dev_err(dev, "Link power down failed: %d\n", ret);
+			dev_err(dev, "%s: cannot stop bus during teardown: %d\n",
+				__func__, ret);
 			return ret;
 		}
-
-		intel_shim_wake(sdw, false);
-
-	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET ||
-		   !clock_stop_quirks) {
-		bool wake_enable = true;
-
-		ret = sdw_cdns_clock_stop(cdns, true);
-		if (ret < 0) {
-			dev_err(dev, "cannot enable clock stop on suspend\n");
-			wake_enable = false;
-		}
-
-		ret = sdw_cdns_enable_interrupt(cdns, false);
+	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || !clock_stop_quirks) {
+		ret = intel_stop_bus(sdw, true);
 		if (ret < 0) {
-			dev_err(dev, "cannot disable interrupts on suspend\n");
-			return ret;
-		}
-
-		ret = intel_link_power_down(sdw);
-		if (ret) {
-			dev_err(dev, "Link power down failed: %d\n", ret);
+			dev_err(dev, "%s: cannot stop bus during clock_stop: %d\n",
+				__func__, ret);
 			return ret;
 		}
-
-		intel_shim_wake(sdw, wake_enable);
 	} else {
 		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
 			__func__, clock_stop_quirks);
@@ -1752,7 +1877,6 @@ static int __maybe_unused intel_resume(struct device *dev)
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_bus *bus = &cdns->bus;
 	int link_flags;
-	bool multi_link;
 	int ret;
 
 	if (bus->prop.hw_disabled || !sdw->startup_done) {
@@ -1762,10 +1886,9 @@ static int __maybe_unused intel_resume(struct device *dev)
 	}
 
 	link_flags = md_flags >> (bus->link_id * 8);
-	multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK);
 
 	if (pm_runtime_suspended(dev)) {
-		dev_dbg(dev, "%s: pm_runtime status was suspended, forcing active\n", __func__);
+		dev_dbg(dev, "pm_runtime status was suspended, forcing active\n");
 
 		/* follow required sequence from runtime_pm.rst */
 		pm_runtime_disable(dev);
@@ -1779,7 +1902,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 			pm_runtime_idle(dev);
 	}
 
-	ret = intel_init(sdw);
+	ret = intel_link_power_up(sdw);
 	if (ret) {
 		dev_err(dev, "%s failed: %d\n", __func__, ret);
 		return ret;
@@ -1791,41 +1914,13 @@ static int __maybe_unused intel_resume(struct device *dev)
 	 */
 	sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
 
-	ret = sdw_cdns_enable_interrupt(cdns, true);
-	if (ret < 0) {
-		dev_err(dev, "cannot enable interrupts during resume\n");
-		return ret;
-	}
-
-	/*
-	 * follow recommended programming flows to avoid timeouts when
-	 * gsync is enabled
-	 */
-	if (multi_link)
-		intel_shim_sync_arm(sdw);
-
-	ret = sdw_cdns_init(&sdw->cdns);
-	if (ret < 0) {
-		dev_err(dev, "unable to initialize Cadence IP during resume\n");
-		return ret;
-	}
-
-	ret = sdw_cdns_exit_reset(cdns);
+	ret = intel_start_bus(sdw);
 	if (ret < 0) {
-		dev_err(dev, "unable to exit bus reset sequence during resume\n");
+		dev_err(dev, "cannot start bus during resume\n");
+		intel_link_power_down(sdw);
 		return ret;
 	}
 
-	if (multi_link) {
-		ret = intel_shim_sync_go(sdw);
-		if (ret < 0) {
-			dev_err(dev, "sync go failed during resume\n");
-			return ret;
-		}
-	}
-	sdw_cdns_check_self_clearing_bits(cdns, __func__,
-					  true, INTEL_MASTER_RESET_ITERATIONS);
-
 	/*
 	 * after system resume, the pm_runtime suspend() may kick in
 	 * during the enumeration, before any children device force the
@@ -1838,7 +1933,7 @@ static int __maybe_unused intel_resume(struct device *dev)
 	 */
 	pm_runtime_mark_last_busy(dev);
 
-	return ret;
+	return 0;
 }
 
 static int __maybe_unused intel_resume_runtime(struct device *dev)
@@ -1847,10 +1942,6 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_bus *bus = &cdns->bus;
 	u32 clock_stop_quirks;
-	bool clock_stop0;
-	int link_flags;
-	bool multi_link;
-	int status;
 	int ret;
 
 	if (bus->prop.hw_disabled || !sdw->startup_done) {
@@ -1862,15 +1953,12 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 	/* unconditionally disable WAKEEN interrupt */
 	intel_shim_wake(sdw, false);
 
-	link_flags = md_flags >> (bus->link_id * 8);
-	multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK);
-
 	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
 	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
-		ret = intel_init(sdw);
+		ret = intel_link_power_up(sdw);
 		if (ret) {
-			dev_err(dev, "%s failed: %d\n", __func__, ret);
+			dev_err(dev, "%s: power_up failed after teardown: %d\n", __func__, ret);
 			return ret;
 		}
 
@@ -1880,145 +1968,45 @@ static int __maybe_unused intel_resume_runtime(struct device *dev)
 		 */
 		sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
 
-		ret = sdw_cdns_enable_interrupt(cdns, true);
-		if (ret < 0) {
-			dev_err(dev, "cannot enable interrupts during resume\n");
-			return ret;
-		}
-
-		/*
-		 * follow recommended programming flows to avoid
-		 * timeouts when gsync is enabled
-		 */
-		if (multi_link)
-			intel_shim_sync_arm(sdw);
-
-		ret = sdw_cdns_init(&sdw->cdns);
-		if (ret < 0) {
-			dev_err(dev, "unable to initialize Cadence IP during resume\n");
-			return ret;
-		}
-
-		ret = sdw_cdns_exit_reset(cdns);
+		ret = intel_start_bus(sdw);
 		if (ret < 0) {
-			dev_err(dev, "unable to exit bus reset sequence during resume\n");
+			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
+			intel_link_power_down(sdw);
 			return ret;
 		}
 
-		if (multi_link) {
-			ret = intel_shim_sync_go(sdw);
-			if (ret < 0) {
-				dev_err(dev, "sync go failed during resume\n");
-				return ret;
-			}
-		}
-		sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime TEARDOWN",
-						  true, INTEL_MASTER_RESET_ITERATIONS);
 
 	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
-		ret = intel_init(sdw);
+		ret = intel_link_power_up(sdw);
 		if (ret) {
-			dev_err(dev, "%s failed: %d\n", __func__, ret);
+			dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
 			return ret;
 		}
 
-		/*
-		 * An exception condition occurs for the CLK_STOP_BUS_RESET
-		 * case if one or more masters remain active. In this condition,
-		 * all the masters are powered on for they are in the same power
-		 * domain. Master can preserve its context for clock stop0, so
-		 * there is no need to clear slave status and reset bus.
-		 */
-		clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
-
-		if (!clock_stop0) {
-
-			/*
-			 * make sure all Slaves are tagged as UNATTACHED and
-			 * provide reason for reinitialization
-			 */
-
-			status = SDW_UNATTACH_REQUEST_MASTER_RESET;
-			sdw_clear_slave_status(bus, status);
-
-			ret = sdw_cdns_enable_interrupt(cdns, true);
-			if (ret < 0) {
-				dev_err(dev, "cannot enable interrupts during resume\n");
-				return ret;
-			}
-
-			/*
-			 * follow recommended programming flows to avoid
-			 * timeouts when gsync is enabled
-			 */
-			if (multi_link)
-				intel_shim_sync_arm(sdw);
-
-			/*
-			 * Re-initialize the IP since it was powered-off
-			 */
-			sdw_cdns_init(&sdw->cdns);
-
-		} else {
-			ret = sdw_cdns_enable_interrupt(cdns, true);
-			if (ret < 0) {
-				dev_err(dev, "cannot enable interrupts during resume\n");
-				return ret;
-			}
-		}
-
-		ret = sdw_cdns_clock_restart(cdns, !clock_stop0);
+		ret = intel_start_bus_after_reset(sdw);
 		if (ret < 0) {
-			dev_err(dev, "unable to restart clock during resume\n");
+			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
+			intel_link_power_down(sdw);
 			return ret;
 		}
-
-		if (!clock_stop0) {
-			ret = sdw_cdns_exit_reset(cdns);
-			if (ret < 0) {
-				dev_err(dev, "unable to exit bus reset sequence during resume\n");
-				return ret;
-			}
-
-			if (multi_link) {
-				ret = intel_shim_sync_go(sdw);
-				if (ret < 0) {
-					dev_err(sdw->cdns.dev, "sync go failed during resume\n");
-					return ret;
-				}
-			}
-		}
-		sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime BUS_RESET",
-						  true, INTEL_MASTER_RESET_ITERATIONS);
-
 	} else if (!clock_stop_quirks) {
 
-		clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
-		if (!clock_stop0)
-			dev_err(dev, "%s invalid configuration, clock was not stopped", __func__);
+		intel_check_clock_stop(sdw);
 
-		ret = intel_init(sdw);
+		ret = intel_link_power_up(sdw);
 		if (ret) {
-			dev_err(dev, "%s failed: %d\n", __func__, ret);
+			dev_err(dev, "%s: power_up failed: %d\n", __func__, ret);
 			return ret;
 		}
 
-		ret = sdw_cdns_enable_interrupt(cdns, true);
+		ret = intel_start_bus_after_clock_stop(sdw);
 		if (ret < 0) {
-			dev_err(dev, "cannot enable interrupts during resume\n");
+			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
+			intel_link_power_down(sdw);
 			return ret;
 		}
-
-		ret = sdw_cdns_clock_restart(cdns, false);
-		if (ret < 0) {
-			dev_err(dev, "unable to resume master during resume\n");
-			return ret;
-		}
-
-		sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime no_quirks",
-						  true, INTEL_MASTER_RESET_ITERATIONS);
 	} else {
-		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
+		dev_err(dev, "%s: clock_stop_quirks %x unsupported\n",
 			__func__, clock_stop_quirks);
 		ret = -EINVAL;
 	}

drivers/soundwire/intel_init.c

@@ -306,7 +306,7 @@ sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
 
 	/* Check SNDWLCAP.LCOUNT */
 	caps = ioread32(ctx->mmio_base + ctx->shim_base + SDW_SHIM_LCAP);
-	caps &= GENMASK(2, 0);
+	caps &= SDW_SHIM_LCAP_LCOUNT_MASK;
 
 	/* Check HW supported vs property value */
 	if (caps < ctx->count) {

drivers/soundwire/qcom.c

@@ -420,7 +420,7 @@ static int qcom_swrm_get_alert_slave_dev_num(struct qcom_swrm_ctrl *ctrl)
 
 	ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
 
-	for (dev_num = 0; dev_num <= SDW_MAX_DEVICES; dev_num++) {
+	for (dev_num = 1; dev_num <= SDW_MAX_DEVICES; dev_num++) {
 		status = (val >> (dev_num * SWRM_MCP_SLV_STATUS_SZ));
 
 		if ((status & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) {
@@ -440,7 +440,7 @@ static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl)
 	ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
 	ctrl->slave_status = val;
 
-	for (i = 0; i <= SDW_MAX_DEVICES; i++) {
+	for (i = 1; i <= SDW_MAX_DEVICES; i++) {
 		u32 s;
 
 		s = (val >> (i * 2));
@@ -573,11 +573,10 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
 				break;
 			case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED:
 			case SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS:
-				dev_err_ratelimited(swrm->dev, "%s: SWR new slave attached\n",
-					__func__);
+				dev_dbg_ratelimited(swrm->dev, "SWR new slave attached\n");
 				swrm->reg_read(swrm, SWRM_MCP_SLV_STATUS, &slave_status);
 				if (swrm->slave_status == slave_status) {
-					dev_err(swrm->dev, "Slave status not changed %x\n",
+					dev_dbg(swrm->dev, "Slave status not changed %x\n",
 						slave_status);
 				} else {
 					qcom_swrm_get_device_status(swrm);

include/linux/soundwire/sdw.h

@@ -892,6 +892,9 @@ struct sdw_master_ops {
  * meaningful if multi_link is set. If set to 1, hardware-based
  * synchronization will be used even if a stream only uses a single
  * SoundWire segment.
+ * @dev_num_ida_min: if set, defines the minimum values for the IDA
+ * used to allocate system-unique device numbers. This value needs to be
+ * identical across all SoundWire bus in the system.
  */
 struct sdw_bus {
 	struct device *dev;
@@ -916,6 +919,7 @@ struct sdw_bus {
 	u32 bank_switch_timeout;
 	bool multi_link;
 	int hw_sync_min_links;
+	int dev_num_ida_min;
 };
 
 int sdw_bus_master_add(struct sdw_bus *bus, struct device *parent,

include/linux/soundwire/sdw_intel.h

@@ -15,32 +15,21 @@
 #define SDW_LINK_SIZE			0x10000
 
 /* Intel SHIM Registers Definition */
+/* LCAP */
 #define SDW_SHIM_LCAP			0x0
-#define SDW_SHIM_LCTL			0x4
-#define SDW_SHIM_IPPTR			0x8
-#define SDW_SHIM_SYNC			0xC
-
-#define SDW_SHIM_CTLSCAP(x)		(0x010 + 0x60 * (x))
-#define SDW_SHIM_CTLS0CM(x)		(0x012 + 0x60 * (x))
-#define SDW_SHIM_CTLS1CM(x)		(0x014 + 0x60 * (x))
-#define SDW_SHIM_CTLS2CM(x)		(0x016 + 0x60 * (x))
-#define SDW_SHIM_CTLS3CM(x)		(0x018 + 0x60 * (x))
-#define SDW_SHIM_PCMSCAP(x)		(0x020 + 0x60 * (x))
+#define SDW_SHIM_LCAP_LCOUNT_MASK	GENMASK(2, 0)
 
-#define SDW_SHIM_PCMSYCHM(x, y)		(0x022 + (0x60 * (x)) + (0x2 * (y)))
-#define SDW_SHIM_PCMSYCHC(x, y)		(0x042 + (0x60 * (x)) + (0x2 * (y)))
-#define SDW_SHIM_PDMSCAP(x)		(0x062 + 0x60 * (x))
-#define SDW_SHIM_IOCTL(x)		(0x06C + 0x60 * (x))
-#define SDW_SHIM_CTMCTL(x)		(0x06E + 0x60 * (x))
-
-#define SDW_SHIM_WAKEEN			0x190
-#define SDW_SHIM_WAKESTS		0x192
+/* LCTL */
+#define SDW_SHIM_LCTL			0x4
 
 #define SDW_SHIM_LCTL_SPA		BIT(0)
 #define SDW_SHIM_LCTL_SPA_MASK		GENMASK(3, 0)
 #define SDW_SHIM_LCTL_CPA		BIT(8)
 #define SDW_SHIM_LCTL_CPA_MASK		GENMASK(11, 8)
 
+/* SYNC */
+#define SDW_SHIM_SYNC			0xC
+
 #define SDW_SHIM_SYNC_SYNCPRD_VAL_24	(24000 / SDW_CADENCE_GSYNC_KHZ - 1)
 #define SDW_SHIM_SYNC_SYNCPRD_VAL_38_4	(38400 / SDW_CADENCE_GSYNC_KHZ - 1)
 #define SDW_SHIM_SYNC_SYNCPRD		GENMASK(14, 0)
@@ -49,19 +38,33 @@
 #define SDW_SHIM_SYNC_CMDSYNC		BIT(16)
 #define SDW_SHIM_SYNC_SYNCGO		BIT(24)
 
+/* Control stream capabililities and channel mask */
+#define SDW_SHIM_CTLSCAP(x)		(0x010 + 0x60 * (x))
+#define SDW_SHIM_CTLS0CM(x)		(0x012 + 0x60 * (x))
+#define SDW_SHIM_CTLS1CM(x)		(0x014 + 0x60 * (x))
+#define SDW_SHIM_CTLS2CM(x)		(0x016 + 0x60 * (x))
+#define SDW_SHIM_CTLS3CM(x)		(0x018 + 0x60 * (x))
+
+/* PCM Stream capabilities */
+#define SDW_SHIM_PCMSCAP(x)		(0x020 + 0x60 * (x))
+
 #define SDW_SHIM_PCMSCAP_ISS		GENMASK(3, 0)
 #define SDW_SHIM_PCMSCAP_OSS		GENMASK(7, 4)
 #define SDW_SHIM_PCMSCAP_BSS		GENMASK(12, 8)
 
+/* PCM Stream Channel Map */
+#define SDW_SHIM_PCMSYCHM(x, y)		(0x022 + (0x60 * (x)) + (0x2 * (y)))
+
+/* PCM Stream Channel Count */
+#define SDW_SHIM_PCMSYCHC(x, y)		(0x042 + (0x60 * (x)) + (0x2 * (y)))
+
 #define SDW_SHIM_PCMSYCM_LCHN		GENMASK(3, 0)
 #define SDW_SHIM_PCMSYCM_HCHN		GENMASK(7, 4)
 #define SDW_SHIM_PCMSYCM_STREAM		GENMASK(13, 8)
 #define SDW_SHIM_PCMSYCM_DIR		BIT(15)
 
-#define SDW_SHIM_PDMSCAP_ISS		GENMASK(3, 0)
-#define SDW_SHIM_PDMSCAP_OSS		GENMASK(7, 4)
-#define SDW_SHIM_PDMSCAP_BSS		GENMASK(12, 8)
-#define SDW_SHIM_PDMSCAP_CPSS		GENMASK(15, 13)
+/* IO control */
+#define SDW_SHIM_IOCTL(x)		(0x06C + 0x60 * (x))
 
 #define SDW_SHIM_IOCTL_MIF		BIT(0)
 #define SDW_SHIM_IOCTL_CO		BIT(1)
@@ -73,13 +76,23 @@
 #define SDW_SHIM_IOCTL_CIBD		BIT(8)
 #define SDW_SHIM_IOCTL_DIBD		BIT(9)
 
-#define SDW_SHIM_CTMCTL_DACTQE		BIT(0)
-#define SDW_SHIM_CTMCTL_DODS		BIT(1)
-#define SDW_SHIM_CTMCTL_DOAIS		GENMASK(4, 3)
+/* Wake Enable*/
+#define SDW_SHIM_WAKEEN			0x190
 
 #define SDW_SHIM_WAKEEN_ENABLE		BIT(0)
+
+/* Wake Status */
+#define SDW_SHIM_WAKESTS		0x192
+
 #define SDW_SHIM_WAKESTS_STATUS		BIT(0)
 
+/* AC Timing control */
+#define SDW_SHIM_CTMCTL(x)		(0x06E + 0x60 * (x))
+
+#define SDW_SHIM_CTMCTL_DACTQE		BIT(0)
+#define SDW_SHIM_CTMCTL_DODS		BIT(1)
+#define SDW_SHIM_CTMCTL_DOAIS		GENMASK(4, 3)
+
 /* Intel ALH Register definitions */
 #define SDW_ALH_STRMZCFG(x)		(0x000 + (0x4 * (x)))
 #define SDW_ALH_NUM_STREAMS		64