ALSA: firewire-lib: add a quirk of packet without valid EOH in CIP format
In IEC 61883-1, when two quadlets CIP header is used, the most significant
bit in second CIP header stands. However, packets from units with MOTU
protocol version 3 have a quirk without this flag. Current packet streaming
layer handles this as protocol error.
This commit adds a new enumeration constant for this quirk, to handle MOTU
protocol version 3.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index f9d12f4..112ad03 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -480,8 +480,9 @@ static int handle_in_packet(struct amdtp_stream *s,
* This module supports 'Two-quadlet CIP header with SYT field'.
* For convenience, also check FMT field is AM824 or not.
*/
- if (((cip_header[0] & CIP_EOH_MASK) == CIP_EOH) ||
- ((cip_header[1] & CIP_EOH_MASK) != CIP_EOH)) {
+ if ((((cip_header[0] & CIP_EOH_MASK) == CIP_EOH) ||
+ ((cip_header[1] & CIP_EOH_MASK) != CIP_EOH)) &&
+ (!(s->flags & CIP_HEADER_WITHOUT_EOH))) {
dev_info_ratelimited(&s->unit->device,
"Invalid CIP header for AMDTP: %08X:%08X\n",
cip_header[0], cip_header[1]);
