ALSA: bebob: Add a quirk of data blocks for MIDI messages for some M-Audio devices

The firmwares for M-Audio Firewire 410/1814 and ProjectMix I/O has a quirk to
ignore MIDI messages in data blocks more than 8. This commit uses a flag which
Fireworks uses for a similar quirk.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index 3e74d9b1e357..452e93684e49 100644
--- a/sound/firewire/bebob/bebob_stream.c
+++ b/sound/firewire/bebob/bebob_stream.c
@@ -472,6 +472,13 @@ int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
                 amdtp_stream_destroy(&bebob->rx_stream);
                 destroy_both_connections(bebob);
         }
+        /*
+         * The firmware for these devices ignore MIDI messages in more than
+         * first 8 data blocks of an received AMDTP packet.
+         */
+        if (bebob->spec == &maudio_fw410_spec ||
+            bebob->spec == &maudio_special_spec)
+                bebob->rx_stream.rx_blocks_for_midi = 8;
 end:
         return err;
 }