diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2019-10-18 15:19:11 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-10-19 09:18:27 +0200 |
| commit | acfedcbe1ce4c69e1da914f39c02d945c80198d4 (patch) | |
| tree | 83adb14a072f8f13db5516c55f2b8c6458ce626c /sound/firewire/amdtp-stream.h | |
| parent | 60dd49298ec5803ca423836d5a724c3fe402cc3f (diff) | |
ALSA: firewire-lib: postpone to start IR context
Some devices have a quirk to postpone transmission of isoc packet for
several dozen or hundred isoc cycles since configured to transmit.
Furthermore, some devices have a quirk to transmit isoc packet with
discontinued data of its header.
In 1394 OHCI specification, software allows to start isoc context with
certain isoc cycle. Linux firewire subsystem has kernel API to use it
as well.
This commit uses the functionality of 1394 OHCI controller to handle
the quirks. At present, this feature is convenient to ALSA bebob and
fireface driver. As a result, some devices can be safely handled, as
long as I know:
- MAudio FireWire solo
- MAudio ProFire Lightbridge
- MAudio FireWire 410
- Roland FA-66
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191018061911.24909-7-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/amdtp-stream.h')
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index c4bde69c2d4f..f2d44e2dc3c8 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -288,7 +288,7 @@ void amdtp_domain_destroy(struct amdtp_domain *d); int amdtp_domain_add_stream(struct amdtp_domain *d, struct amdtp_stream *s, int channel, int speed); -int amdtp_domain_start(struct amdtp_domain *d); +int amdtp_domain_start(struct amdtp_domain *d, unsigned int ir_delay_cycle); void amdtp_domain_stop(struct amdtp_domain *d); static inline int amdtp_domain_set_events_per_period(struct amdtp_domain *d, |