Without dual fifo support,  handware underrun would occasionally occur and =
then two audio channels would physically swap. This could be easily reprodu=
ced in low bus frequency situation, while it would be better if we enable d=
ual fifo.

Sent by Android device.

Timur Tabi [off-list ref] wrote:


Nicolin Chen wrote:

By enabling dual fifo mode, it would allow SSI enter a better performance
to transimit/receive data without occasional hardware underrun/overrun.

Have you measured any real performance gain with this patch?  I
considered adding dual-FIFO support when I originally wrote this driver,
but it didn't appear to have any real benefit, but it used twice as many
DMA channels.

I'm concerned that this is another patch that just enables a useless
feature.