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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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6
drivers/firewire/core-card.c
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@@ -650,6 +650,11 @@ static void dummy_flush_queue_iso(struct fw_iso_context *ctx)
{
}
static int dummy_flush_iso_completions(struct fw_iso_context *ctx)
{
return -ENODEV;
}
static const struct fw_card_driver dummy_driver_template = {
.read_phy_reg = dummy_read_phy_reg,
.update_phy_reg = dummy_update_phy_reg,
@@ -662,6 +667,7 @@ static const struct fw_card_driver dummy_driver_template = {
.set_iso_channels = dummy_set_iso_channels,
.queue_iso = dummy_queue_iso,
.flush_queue_iso = dummy_flush_queue_iso,
.flush_iso_completions = dummy_flush_iso_completions,
};
void fw_card_release(struct kref *kref)