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>
diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index ab5b7a1..cdc9b71 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -426,6 +426,7 @@
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);