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ucm: docs: Add EchoReferencePCM

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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@chromium.org>
This commit is contained in:
Curtis Malainey 2019-09-24 11:12:44 -07:00
parent e9f41ba233
commit c2571ba86c
1 changed files with 3 additions and 0 deletions
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3
include/use-case.h
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@ -349,6 +349,9 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
* - CoupledMixers * - CoupledMixers
* - Mixer controls that should be changed together. * - Mixer controls that should be changed together.
* E.g. "Left Master,Right Master". * E.g. "Left Master,Right Master".
* - EchoReferencePCM
* - If userspace wants an echo reference channel this value identifies
* the pcm to be used.
* - EDIDFile * - EDIDFile
* - Path to EDID file for HDMI devices * - Path to EDID file for HDMI devices
* - JackCTL * - JackCTL