@@ -1107,3 +1107,27 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
return ret;
}
EXPORT_SYMBOL(sdw_handle_slave_status);
+
+void sdw_clear_slave_status(struct sdw_bus *bus)
+{
+ struct sdw_slave *slave;
+ int i;
+
+ /* Check all non-zero devices */
+ for (i = 1; i <= SDW_MAX_DEVICES; i++) {
+ mutex_lock(&bus->bus_lock);
+ if (test_bit(i, bus->assigned) == false) {
+ mutex_unlock(&bus->bus_lock);
+ continue;
+ }
+ mutex_unlock(&bus->bus_lock);
+
+ slave = sdw_get_slave(bus, i);
+ if (!slave)
+ continue;
+
+ if (slave->status != SDW_SLAVE_UNATTACHED)
+ sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED);
+ }
+}
+EXPORT_SYMBOL(sdw_clear_slave_status);
@@ -165,4 +165,6 @@ sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
return sdw_write(slave, addr, tmp);
}
+void sdw_clear_slave_status(struct sdw_bus *bus);
+
#endif /* __SDW_BUS_H */
When resuming, we need to re-enumerate and restart from UNATTACHED. This will help implement a more robust state machine avoiding race conditions on resume. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> --- drivers/soundwire/bus.c | 24 ++++++++++++++++++++++++ drivers/soundwire/bus.h | 2 ++ 2 files changed, 26 insertions(+)