tree 61d4296cdce4762a4e55032e4e83de45d9c66df2
parent 5027000e8e612923ed6f6b2289ce384e5e841556
author Guodong Hu <guodhu@codeaurora.org> 1561372923 +0800
committer Derek Chen <chenche@codeaurora.org> 1571332962 -0700

hal: add external echo reference to ecns-hfp calls

* Add ec_car_state to switch between single-mic
  and multi-mic ecns hfp calls.
* Add the capability to have an echo reference for
  both single-mic and multi-mic ecns hfp call.
* New snd device is introduced for multi-mic ecns hfp.

Change-Id: I5a8c869cf6854020e15efb61cbaf78f3f027e1ee
Signed-off-by: Guodong Hu <guodhu@codeaurora.org>
Signed-off-by: Derek Chen <chenche@codeaurora.org>