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-rw-r--r--drivers/soundwire/master.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/soundwire/master.c b/drivers/soundwire/master.c
index 3488bb824e84..9b05c9e25ebe 100644
--- a/drivers/soundwire/master.c
+++ b/drivers/soundwire/master.c
@@ -9,6 +9,15 @@
#include "bus.h"
/*
+ * The 3s value for autosuspend will only be used if there are no
+ * devices physically attached on a bus segment. In practice enabling
+ * the bus operation will result in children devices become active and
+ * the master device will only suspend when all its children are no
+ * longer active.
+ */
+#define SDW_MASTER_SUSPEND_DELAY_MS 3000
+
+/*
* The sysfs for properties reflects the MIPI description as given
* in the MIPI DisCo spec
*
@@ -154,7 +163,12 @@ int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
bus->dev = &md->dev;
bus->md = md;
+ pm_runtime_set_autosuspend_delay(&bus->md->dev, SDW_MASTER_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&bus->md->dev);
+ pm_runtime_mark_last_busy(&bus->md->dev);
+ pm_runtime_set_active(&bus->md->dev);
pm_runtime_enable(&bus->md->dev);
+ pm_runtime_idle(&bus->md->dev);
device_register_err:
return ret;
}