SAI in the linux kernel source code, how the two submodules can be received at the same time.

[Poppy]

linux内核源码当中的SAI，两个子模块如何同时进行接收，一般正点的sda用于发送，SDB用于接收

Translated to English

linux kernel source code among the SAI, how the two submodules at the same time to receive, the general positive point of the sda is used to send, SDB is used to receive