From: Curtis Malainey <cujomalainey@xxxxxxxxxxxx> 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@xxxxxxxxxxxx> --- include/use-case.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/use-case.h b/include/use-case.h index e5d4fd68..3c7c0a26 100644 --- a/include/use-case.h +++ b/include/use-case.h @@ -376,6 +376,15 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr, * - CaptureMicInfoFile * - json file with the microphone array placement and type description * (e.g. output from nhlt-dmic-info) + * - EchoReferenceDev + * - The name of a section device that provides some sort of reference + * to the current section device. This can be a echo taken as a + * reference or as IV data from a smart amp. The device should be + * opened immediately after this device and closed right before this + * device. This is meant to support hardware features such as smart + * amps or hardware offloaded processing where the host still needs + * to open the channel. The audio server should open the reference + * device with the same parameters it opens the source device with. * - EDIDFile * - Path to EDID file for HDMI devices * - JackCTL -- 2.42.0.rc1.204.g551eb34607-goog
