diff options
Diffstat (limited to 'drivers/soundwire')
| -rw-r--r-- | drivers/soundwire/bus.c | 7 | ||||
| -rw-r--r-- | drivers/soundwire/slave.c | 52 |
2 files changed, 52 insertions, 7 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index fc53dbe57f85..be5d437058ed 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -422,10 +422,11 @@ static struct sdw_slave *sdw_get_slave(struct sdw_bus *bus, int i) static int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id) { - if (slave->id.unique_id != id.unique_id || - slave->id.mfg_id != id.mfg_id || + if (slave->id.mfg_id != id.mfg_id || slave->id.part_id != id.part_id || - slave->id.class_id != id.class_id) + slave->id.class_id != id.class_id || + (slave->id.unique_id != SDW_IGNORED_UNIQUE_ID && + slave->id.unique_id != id.unique_id)) return -ENODEV; return 0; diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c index e4e4505b5111..e656ff57fc04 100644 --- a/drivers/soundwire/slave.c +++ b/drivers/soundwire/slave.c @@ -29,10 +29,17 @@ static int sdw_slave_add(struct sdw_bus *bus, slave->dev.parent = bus->dev; slave->dev.fwnode = fwnode; - /* name shall be sdw:link:mfg:part:class:unique */ - dev_set_name(&slave->dev, "sdw:%x:%x:%x:%x:%x", - bus->link_id, id->mfg_id, id->part_id, - id->class_id, id->unique_id); + if (id->unique_id == SDW_IGNORED_UNIQUE_ID) { + /* name shall be sdw:link:mfg:part:class */ + dev_set_name(&slave->dev, "sdw:%x:%x:%x:%x", + 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:%x:%x:%x:%x:%x", + bus->link_id, id->mfg_id, id->part_id, + id->class_id, id->unique_id); + } slave->dev.release = sdw_slave_release; slave->dev.bus = &sdw_bus_type; @@ -103,6 +110,7 @@ static bool find_slave(struct sdw_bus *bus, int sdw_acpi_find_slaves(struct sdw_bus *bus) { struct acpi_device *adev, *parent; + struct acpi_device *adev2, *parent2; parent = ACPI_COMPANION(bus->dev); if (!parent) { @@ -112,10 +120,46 @@ int sdw_acpi_find_slaves(struct sdw_bus *bus) list_for_each_entry(adev, &parent->children, node) { struct sdw_slave_id id; + struct sdw_slave_id id2; + bool ignore_unique_id = true; if (!find_slave(bus, adev, &id)) continue; + /* brute-force O(N^2) search for duplicates */ + parent2 = parent; + list_for_each_entry(adev2, &parent2->children, node) { + + if (adev == adev2) + continue; + + if (!find_slave(bus, adev2, &id2)) + continue; + + if (id.sdw_version != id2.sdw_version || + id.mfg_id != id2.mfg_id || + id.part_id != id2.part_id || + id.class_id != id2.class_id) + continue; + + if (id.unique_id != id2.unique_id) { + dev_dbg(bus->dev, + "Valid unique IDs %x %x for Slave mfg %x part %d\n", + id.unique_id, id2.unique_id, + id.mfg_id, id.part_id); + ignore_unique_id = false; + } else { + dev_err(bus->dev, + "Invalid unique IDs %x %x for Slave mfg %x part %d\n", + id.unique_id, id2.unique_id, + id.mfg_id, id.part_id); + return -ENODEV; + } + } + + if (ignore_unique_id) + id.unique_id = SDW_IGNORED_UNIQUE_ID; + /* * don't error check for sdw_slave_add as we want to continue * adding Slaves |