firewire: allow explicit flushing of iso packet completions

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>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index ab5b7a18decf..cdc9b719e9c7 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -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);