Connecting 2 codecs on MP257

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I am trying to connect to audio codecs to give 4 channel of audio on a MP257. Can I connect SAI2.SCKA TO BCK on both , SAI2.FSA to LRCK on both, SAI2.SDA to DIN on the first and SAI2.SDB to DIN on the second.

My concern is the clocking, can I common both clocks, or do I also need to use SAI2.FSB (which as I am using the ethernet switch & 3 ports I don't seem to be able to do).