AM625: MCLK of MCASP ON AM6254

HI  Team:

we can use "MCLK" as our sync clock between MCU and codec IC when we use NXP IMX8 serial processor.

but we can't find this "MCLK" function on AM6254,TI.

There only are four clock--MCASP0_ACLKR/ACLKX/AFSR/_AFSX . I also checked the AUDIO_EXT_REFCLK0 and AUDIO_EXT_REFCLK1,

so please check my query as followings:

1. how can we get the sync clock between AM6254 and codec IC?

2. can AUDIO_EXT_REFCLK0 and AUDIO_EXT_REFCLK1 be used as sync clock for MCU and codec IC?

3. if query 2 's answer is yes, when I want to use 3 groups MCASP(0/1/2), How can i use the AUDIO_EXT_REFCLK0 and AUDIO_EXT_REFCLK1 for 3 sync clock?