Hi, This patchset is a part of my continuous work to improve ALSA IEC 61883-1/6 packet streaming engine for clock-recovery, addressed in my previous message: https://mailman.alsa-project.org/pipermail/alsa-devel/2019-August/153388.html For the clock-recovery, information in the sequence of tx packet from device should be used to generate the sequence of rx packet to the device. In current implementation of the engine, the packets are processed in different tasklet contexts for each IR/IT context. This is inconvenient to bypass information between these IR/IT contexts. In this patchset, the engine is improved to process all of IR/IT contexts in the same domain by a tasklet context for one of IT context. For convenience, the IT context is called as 'IRQ target'. As a result, 1394 OHCI controller is managed to generate hardware IRQ just for the IRQ target. All of rx/tx packets are processed in tasklet for the hardware IRQ. Takashi Sakamoto (6): ALSA: firewire-lib: add irq_target member into amdtp_domain struct ALSA: firewire-lib: replace pointer callback to flush isoc contexts in AMDTP domain ALSA: firewire-lib: replace ack callback to flush isoc contexts in AMDTP domain ALSA: firewire-lib: cancel flushing isoc context in the laste step to process context callback ALSA: firewire-lib: handle several AMDTP streams in callback handler of IRQ target ALSA: firewire-lib: postpone to start IR context sound/firewire/amdtp-stream.c | 329 +++++++++++++++----- sound/firewire/amdtp-stream.h | 17 +- sound/firewire/bebob/bebob_pcm.c | 18 +- sound/firewire/bebob/bebob_stream.c | 10 +- sound/firewire/dice/dice-pcm.c | 8 +- sound/firewire/dice/dice-stream.c | 2 +- sound/firewire/digi00x/digi00x-pcm.c | 8 +- sound/firewire/digi00x/digi00x-stream.c | 2 +- sound/firewire/fireface/ff-pcm.c | 8 +- sound/firewire/fireface/ff-stream.c | 10 +- sound/firewire/fireworks/fireworks_pcm.c | 10 +- sound/firewire/fireworks/fireworks_stream.c | 2 +- sound/firewire/motu/motu-pcm.c | 8 +- sound/firewire/motu/motu-stream.c | 2 +- sound/firewire/oxfw/oxfw-pcm.c | 8 +- sound/firewire/oxfw/oxfw-stream.c | 2 +- sound/firewire/tascam/tascam-pcm.c | 8 +- sound/firewire/tascam/tascam-stream.c | 2 +- 18 files changed, 325 insertions(+), 129 deletions(-) -- 2.20.1 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
