Bluetooth: BAP: Modify range of BT_BAP_BROADCAST_SNK_SUBGROUP_COUNT

The range of BT_BAP_BROADCAST_SNK_SUBGROUP_COUNT should be relative to
BT_BAP_BASS_MAX_SUBGROUPS. The broadcast sink depends on the scan
delegator, and thus it does not make sense for the broadcast sink
to support more subgroups than what the scan delegator supports.

Since this no longer relates to the number of streams, there
may be new runtime errors if applications attempt
to sync to more subgroups than the number of ISO channels
supported.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

subsys/bluetooth/audio/Kconfig.bap

@@ -171,9 +171,8 @@ if BT_BAP_BROADCAST_SINK
 
 config BT_BAP_BROADCAST_SNK_SUBGROUP_COUNT
 	int "Basic Audio Profile Broadcast Sink subgroup count"
-	default 1
-	range 1 BT_ISO_MAX_CHAN if BT_ISO_MAX_CHAN < 31
-	range 1 31
+	default BT_BAP_BASS_MAX_SUBGROUPS
+	range 1 BT_BAP_BASS_MAX_SUBGROUPS
 	help
 	  This option sets the maximum number of subgroups per broadcast sink
 	  to support.

tests/bluetooth/tester/overlay-le-audio.conf

@@ -61,6 +61,7 @@ CONFIG_BT_BAP_BROADCAST_SNK_STREAM_COUNT=2
 CONFIG_BT_BAP_BROADCAST_SNK_SUBGROUP_COUNT=2
 
 # BASS
+CONFIG_BT_BAP_BASS_MAX_SUBGROUPS=2
 CONFIG_BT_PER_ADV_SYNC_TRANSFER_SENDER=y
 CONFIG_BT_AUDIO_CODEC_CFG_MAX_METADATA_SIZE=255
 CONFIG_BT_PER_ADV_SYNC_TRANSFER_RECEIVER=y