[alsa-devel] [PATCH 09/11] ucm: docs: Add EchoReferenceDev

[Curtis Malainey]

Sometimes userspace may want to use a reference channel to cancel echos
when using video chat, this value identifies the device which carries
that channel.

Signed-off-by: Curtis Malainey <cujomalainey at chromium.org>
---
 include/use-case.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/use-case.h b/include/use-case.h
index 9a10f390..e84f3f8f 100644
--- a/include/use-case.h
+++ b/include/use-case.h
@@ -308,6 +308,9 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
  *   - CoupledMixers
  *      - Mixer controls that should be changed together.
  *        E.g. "Left Master,Right Master".
+ *   - EchoReferenceDev
+ *      - If userspace wants an echo refence channel this value identifies the
+ *        device to be used.
  *   - EDIDFile
  *      - Path to EDID file for HDMI devices
  *   - JackControl, JackDev, JackHWMute
-- 
2.24.0.432.g9d3f5f5b63-goog