how to output I2S when AIC3X is not exist

hi

We are using DVRRDK_02.80.00.10;
In our design,we don't use AIC3X and use other audio codec which is't need I2C to config,

it works just need I2S input;

I plan to modify the AIC3X's driver to support it,

 now the originally driver runs don't print any error, but no EDMA Interrupts, no I2S output.

I don't find any wrong.
What am I missing with some wrongs?
How to modify drivers to output I2S when AIC3X is not exist?

Regards,
joey