This commit adds 'struct amdtp_domain' structure. This structure
has list of instance of AMDTP stream to handle a couple of
isochronous contexts.
Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
sound/firewire/amdtp-stream.c | 22 ++++++++++++++++++++++
sound/firewire/amdtp-stream.h | 7 +++++++
2 files changed, 29 insertions(+)
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 369e75e33120..02077696fa77 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -1136,3 +1136,25 @@ void amdtp_stream_pcm_abort(struct amdtp_stream *s)
snd_pcm_stop_xrun(pcm);
}
EXPORT_SYMBOL(amdtp_stream_pcm_abort);
+
+/**
+ * amdtp_domain_init - initialize an AMDTP domain structure
+ * @d: the AMDTP domain to initialize.
+ */
+int amdtp_domain_init(struct amdtp_domain *d)
+{
+ INIT_LIST_HEAD(&d->streams);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(amdtp_domain_init);
+
+/**
+ * amdtp_domain_destroy - destroy an AMDTP domain structure
+ * @d: the AMDTP domain to destroy.
+ */
+void amdtp_domain_destroy(struct amdtp_domain *d)
+{
+ WARN_ON(!list_empty(&d->streams));
+}
+EXPORT_SYMBOL_GPL(amdtp_domain_destroy);
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 50041fa884d9..2378db4b4195 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -267,4 +267,11 @@ static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s,
msecs_to_jiffies(timeout)) > 0;
}
+struct amdtp_domain {
+ struct list_head streams;
+};
+
+int amdtp_domain_init(struct amdtp_domain *d);
+void amdtp_domain_destroy(struct amdtp_domain *d);
+
#endif
--
2.20.1
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