[PATCH BlueZ 1/3] lib: Add BT_ISO_SYNC_FACTOR

[Iulia Tanasescu <iulia.tanasescu@nxp.com>]

This defines the default sync factor value to be used by ISO Broadcasters.
---
 lib/bluetooth.h      | 12 ++++++++++++
 profiles/audio/bap.c |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/bluetooth.h b/lib/bluetooth.h
index 073ed875d..ea9adb83b 100644
--- a/lib/bluetooth.h
+++ b/lib/bluetooth.h
@@ -153,6 +153,18 @@ struct bt_voice {
 
 #define BT_ISO_SYNC_TIMEOUT	0x07d0 /* 20 secs */
 
+/* For an ISO Broadcaster, this value is used to compute
+ * the desired Periodic Advertising Interval as a function
+ * of SDU interval, based on the formula:
+ *
+ * PA_Interval = SDU_Interval * sync_factor
+ *
+ * This is useful for adjusting how frequent to send PA
+ * announcements for Broadcast Sinks to discover, depending
+ * on scenario.
+ */
+#define BT_ISO_SYNC_FACTOR	0x01
+
 #define BT_ISO_QOS_GROUP_UNSET	0xff
 #define BT_ISO_QOS_STREAM_UNSET	0xff
 
diff --git a/profiles/audio/bap.c b/profiles/audio/bap.c
index a561c446a..f382b43a5 100644
--- a/profiles/audio/bap.c
+++ b/profiles/audio/bap.c
@@ -847,7 +847,7 @@ static struct bap_setup *setup_new(struct bap_ep *ep)
 		/* Mark BIG and BIS to be auto assigned */
 		setup->qos.bcast.big = BT_ISO_QOS_BIG_UNSET;
 		setup->qos.bcast.bis = BT_ISO_QOS_BIS_UNSET;
-		setup->qos.bcast.sync_factor = 0x01;
+		setup->qos.bcast.sync_factor = BT_ISO_SYNC_FACTOR;
 		setup->qos.bcast.sync_timeout = BT_ISO_SYNC_TIMEOUT;
 		setup->qos.bcast.timeout = BT_ISO_SYNC_TIMEOUT;
 		setup->qos_parser = setup_parse_bcast_qos;
-- 
2.43.0