Hi, This patchset updates my former RFC, and go for merging to Linux 4.7. [RFC][PATCH 0/6] ALSA: firewire: drop reusing incoming packet parameters for outgoing packet parameters http://mailman.alsa-project.org/pipermail/alsa-devel/2016-April/107290.html The aim of this patchset is to remove a feature from firewire-lib module. I call it as 'full duplex streaming with timestamp synchronization'. The feature is based on our understanding of IEC 61883-6. In the specification, a function block should reuse some parameters of incoming packets for outgoing packets. Current ALSA firewire stack partly implement it. However, actual audio and music units on IEEE 1394 bus don't expect corresponding drivers to satisfy the feature. On the other hand, the feature brings inconveniences to this module. When this feature is enabled, a software IRQ context processes packets for both of IR/IT contexts. This consumes more time over local CPUs than handling one context. Furthermore, cycle count for outgoing packets becomes improper because they're for incoming packets. For these reasons, this patchset removes the feature from ALSA firewire stack. Changes: - The last patch is newly added. Regards Takashi Sakamoto (7): ALSA: bebob: drop reuse of incoming packet parameter for outgoing packet parameter ALSA: fireworks: drop reuse of incoming packet parameter for ougoing packet parameter ALSA: firewire-tascam: drop reuse of incoming packet parameter for outgoing packet parameter ALSA: firewire-lib: handle IT/IR contexts in each software interrupt context ALSA: firewire-lib: code cleanup for incoming packet handling ALSA: firewire-lib: code cleanup for outgoing packet handling ALSA: firewire-lib: enable the same feature as CIP_SKIP_INIT_DBC_CHECK flag sound/firewire/amdtp-stream.c | 98 +++++++++------------------ sound/firewire/amdtp-stream.h | 36 ++-------- sound/firewire/bebob/bebob.h | 1 - sound/firewire/bebob/bebob_stream.c | 101 +++++++--------------------- sound/firewire/digi00x/amdtp-dot.c | 2 +- sound/firewire/fireworks/fireworks.h | 1 - sound/firewire/fireworks/fireworks_stream.c | 84 +++++------------------ sound/firewire/oxfw/oxfw-stream.c | 3 +- sound/firewire/tascam/tascam-stream.c | 26 ++++--- 9 files changed, 94 insertions(+), 258 deletions(-) -- 2.7.4 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
