soundwire: fix initializing sysfs for same devices on different buses

[ Upstream commit 8a8a9ac ]

If same devices with same device IDs are present on different soundwire
buses, the probe fails due to conflicting device names and sysfs
entries:

  sysfs: cannot create duplicate filename '/bus/soundwire/devices/sdw:0:0217:0204:00:0'

The link ID is 0 for both devices, so they should be differentiated by
the controller ID. Add the controller ID so, the device names and sysfs entries look
like:

  sdw:1:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6ab0000.soundwire-controller/sdw-master-1-0/sdw:1:0:0217:0204:00:0
  sdw:3:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6b10000.soundwire-controller/sdw-master-3-0/sdw:3:0:0217:0204:00:0

[PLB changes: use bus->controller_id instead of bus->id]

Fixes: 7c3cd18 ("soundwire: Add Master registration")
Cc: stable@vger.kernel.org
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Co-developed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Mark Brown <broonie@kernel.org>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20231017160933.12624-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/soundwire/slave.c

@@ -39,14 +39,14 @@ int sdw_slave_add(struct sdw_bus *bus,
 	slave->dev.fwnode = fwnode;
 
 	if (id->unique_id == SDW_IGNORED_UNIQUE_ID) {
-		/* name shall be sdw:link:mfg:part:class */
-		dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x",
-			     bus->link_id, id->mfg_id, id->part_id,
+		/* name shall be sdw:ctrl:link:mfg:part:class */
+		dev_set_name(&slave->dev, "sdw:%01x:%01x:%04x:%04x:%02x",
+			     bus->controller_id, bus->link_id, id->mfg_id, id->part_id,
 			     id->class_id);
 	} else {
-		/* name shall be sdw:link:mfg:part:class:unique */
-		dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x:%01x",
-			     bus->link_id, id->mfg_id, id->part_id,
+		/* name shall be sdw:ctrl:link:mfg:part:class:unique */
+		dev_set_name(&slave->dev, "sdw:%01x:%01x:%04x:%04x:%02x:%01x",
+			     bus->controller_id, bus->link_id, id->mfg_id, id->part_id,
 			     id->class_id, id->unique_id);
 	}
 

sound/soc/intel/boards/sof_sdw.c

@@ -1197,11 +1197,11 @@ static int fill_sdw_codec_dlc(struct device *dev,
 	else if (is_unique_device(adr_link, sdw_version, mfg_id, part_id,
 				  class_id, adr_index))
 		codec->name = devm_kasprintf(dev, GFP_KERNEL,
-					     "sdw:%01x:%04x:%04x:%02x", link_id,
+					     "sdw:0:%01x:%04x:%04x:%02x", link_id,
 					     mfg_id, part_id, class_id);
 	else
 		codec->name = devm_kasprintf(dev, GFP_KERNEL,
-					     "sdw:%01x:%04x:%04x:%02x:%01x", link_id,
+					     "sdw:0:%01x:%04x:%04x:%02x:%01x", link_id,
 					     mfg_id, part_id, class_id, unique_id);
 
 	if (!codec->name)