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-rw-r--r--sound/firewire/bebob/bebob_stream.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index 5e4a61458be2..7ac0d9f495c4 100644
--- a/sound/firewire/bebob/bebob_stream.c
+++ b/sound/firewire/bebob/bebob_stream.c
@@ -658,7 +658,15 @@ int snd_bebob_stream_start_duplex(struct snd_bebob *bebob)
if (err < 0)
goto error;
- err = amdtp_domain_start(&bebob->domain);
+ // The device postpones start of transmission mostly for 1 sec
+ // after receives packets firstly. For safe, IR context starts
+ // 1.5 sec (=12000 cycles) later. This is within 2.0 sec
+ // (=CALLBACK_TIMEOUT).
+ // Furthermore, some devices transfer isoc packets with
+ // discontinuous counter in the beginning of packet streaming.
+ // The delay has an effect to avoid detection of this
+ // discontinuity.
+ err = amdtp_domain_start(&bebob->domain, 12000);
if (err < 0)
goto error;