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firewire: allow explicit flushing of iso packet completions

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Extend the kernel and userspace APIs to allow reporting all currently
completed isochronous packets, even if the next interrupt packet has not
yet been reached.  This is required to determine the status of the
packets at the end of a paused or stopped stream, and useful for more
precise synchronization of audio streams.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Clemens Ladisch
2012-03-18 19:06:39 +01:00
committed by Stefan Richter
parent 18d627113b
commit d1bbd20972
7 changed files with 127 additions and 13 deletions
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include/linux/firewire.h
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@@ -426,6 +426,7 @@ int fw_iso_context_queue(struct fw_iso_context *ctx,
struct fw_iso_buffer *buffer,
unsigned long payload);
void fw_iso_context_queue_flush(struct fw_iso_context *ctx);
int fw_iso_context_flush_completions(struct fw_iso_context *ctx);
int fw_iso_context_start(struct fw_iso_context *ctx,
int cycle, int sync, int tags);
int fw_iso_context_stop(struct fw_iso_context *ctx);