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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2015-06-14 12:49:35 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-06-15 13:38:14 +0200 |
| commit | c4d860a0d256663937b51468ea13de3c2cd2a09d (patch) | |
| tree | 979ed49a1c8ad1a74c04fea4b1f3a5dafa68eba4 /sound | |
| parent | 9a73195e614bf01722331c820c260b9cb77e634e (diff) | |
| download | linux-c4d860a0d256663937b51468ea13de3c2cd2a09d.tar.bz2 | |
ALSA: bebob: loosen up severity of checking continuity for BeBoB v3 quirk
PrismSound Orpheus, Behringer UFX1604 and FCA610 work with BeBoB v3, and
they're confirmed to transmit discontinuous packets in the beginning of
streaming.
payload CIP headers
8 0x00070000 0x9002FFFF
8 0x00070000 0x9002FFFF
8 0x00070000 0x9002FFFF
8 0x00070008 0x9002FFFF <-
8 0x00070008 0x9002FFFF
8 0x00070008 0x9002FFFF
8 0x00070008 0x9002FFFF
8 0x00070008 0x9002FFFF
8 0x00070008 0x9002FFFF
232 0x00070000 0x9002E798 <-
232 0x00070008 0x9002FB99
232 0x00070010 0x90021398
8 0x00070018 0x9002FFFF
(This sample was got with Behringer FCA610 and FFADO library.)
This commit sets CIP_EMPTY_HAS_WRONG_DBC and CIP_SKIP_DBC_ZERO_CHECK to
ignore these discontinuities.
Tested-by: Kim Tore Jensen <kim@incendio.no>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/firewire/bebob/bebob_stream.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index 9c810f9ec8d6..d0df6c17f7f7 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -540,6 +540,17 @@ int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) /* See comments in next function */ init_completion(&bebob->bus_reset); bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK; + + /* + * BeBoB v3 transfers packets with these qurks: + * - In the beginning of streaming, the value of dbc is incremented + * even if no data blocks are transferred. + * - The value of dbc is reset suddenly. + */ + if (bebob->version > 2) + bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC | + CIP_SKIP_DBC_ZERO_CHECK; + /* * At high sampling rate, M-Audio special firmware transmits empty * packet with the value of dbc incremented by 8 but the others are |