| Message ID | 20190611132118.8378-1-o-takashi@sakamocchi.jp (mailing list archive) |
|---|---|
| Headers | show |
| Series | ALSA: firewire-digi00x/dice: reserve/release isochronous resources in pcm.hw_params/hw_free callbacks | expand |
On Tue, 11 Jun 2019 15:21:06 +0200, Takashi Sakamoto wrote: > > Hi, > > This patchset is a part of series of patches for all of drivers in > ALSA firewire stack to reserve/release isochronous resources in > pcm.hw_params/hw_free callbacks. > > In current implementation, the resources are reserved at the same time > to start packet streaming, and released at the same time to stop packet > streaming. However, once allocated, the resources are available > independent of lifetime of each of packet streaming. > > The isochronous resources are the resources of IEEE 1394 bus. On the > other side of view, it's a kind of resources of hardware to maintain > the bus (isochronous resource manager). For this kind of reservation and > release, hw_params and hw_free operations are suitable in ALSA PCM > interface. > > Ideally, the operation to reserve/release isochronous resource should > be separated from the operation to start/stop packet streaming. However, > IEEE 1394 bus has reset event. Once reset occurs, isochronous resource > manager releases allocated resources. The resources should be > reallocated by requesters themselves. For this reason, in this patchset, > bus generation is checked before starting packet streaming. If > generation is updated, reallocation is requested to isochronous > resource manager, then packet streaming starts. > > Takashi Sakamoto (12): > ALSA: firewire-digi00x: refactoring to move timing of registration for > isochronous channel > ALSA: firewire-digi00x: code refactoring to finish streaming session > ALSA: firewire-digi00x: simplify error path to begin streaming session > ALSA: firewire-digi00x: code refactoring to keep isochronous resources > ALSA: firewire-digi00x: reserve/release isochronous resources in > pcm.hw_params/hw_free callbacks > ALSA: firewire-digi00x: update isochronous resources when starting > packet streaming after bus-reset > ALSA: firewire-digi00x: code refactoring for pcm.hw_params/hw_free > callbacks > ALSA: dice: code refactoring to stop packet streaming > ALSA: dice: code refactoring to keep isochronous resources > ALSA: dice: reserve/release isochronous resources in > pcm.hw_params/hw_free callbacks > ALSA: dice: update isochronous resources when starting packet > streaming after bus-reset > ALSA: dice: code refactoring for pcm.hw_params/hw_free callbacks Applied all twelve patches. Thanks. Takashi
Hi, This patchset is a part of series of patches for all of drivers in ALSA firewire stack to reserve/release isochronous resources in pcm.hw_params/hw_free callbacks. In current implementation, the resources are reserved at the same time to start packet streaming, and released at the same time to stop packet streaming. However, once allocated, the resources are available independent of lifetime of each of packet streaming. The isochronous resources are the resources of IEEE 1394 bus. On the other side of view, it's a kind of resources of hardware to maintain the bus (isochronous resource manager). For this kind of reservation and release, hw_params and hw_free operations are suitable in ALSA PCM interface. Ideally, the operation to reserve/release isochronous resource should be separated from the operation to start/stop packet streaming. However, IEEE 1394 bus has reset event. Once reset occurs, isochronous resource manager releases allocated resources. The resources should be reallocated by requesters themselves. For this reason, in this patchset, bus generation is checked before starting packet streaming. If generation is updated, reallocation is requested to isochronous resource manager, then packet streaming starts. Takashi Sakamoto (12): ALSA: firewire-digi00x: refactoring to move timing of registration for isochronous channel ALSA: firewire-digi00x: code refactoring to finish streaming session ALSA: firewire-digi00x: simplify error path to begin streaming session ALSA: firewire-digi00x: code refactoring to keep isochronous resources ALSA: firewire-digi00x: reserve/release isochronous resources in pcm.hw_params/hw_free callbacks ALSA: firewire-digi00x: update isochronous resources when starting packet streaming after bus-reset ALSA: firewire-digi00x: code refactoring for pcm.hw_params/hw_free callbacks ALSA: dice: code refactoring to stop packet streaming ALSA: dice: code refactoring to keep isochronous resources ALSA: dice: reserve/release isochronous resources in pcm.hw_params/hw_free callbacks ALSA: dice: update isochronous resources when starting packet streaming after bus-reset ALSA: dice: code refactoring for pcm.hw_params/hw_free callbacks sound/firewire/dice/dice-midi.c | 10 +- sound/firewire/dice/dice-pcm.c | 62 ++--- sound/firewire/dice/dice-stream.c | 350 +++++++++++++----------- sound/firewire/dice/dice.h | 4 +- sound/firewire/digi00x/digi00x-midi.c | 10 +- sound/firewire/digi00x/digi00x-pcm.c | 65 ++--- sound/firewire/digi00x/digi00x-stream.c | 189 ++++++------- sound/firewire/digi00x/digi00x.h | 4 +- 8 files changed, 342 insertions(+), 352 deletions(-)