Apollo Lake I2S & HDA

Apollo Lake has two I2S interface(I2S2&I2S6) and one HDA. I2S6 are multiplexed on the same ball as High Definition Audio. PDG has one comment on I2S page that is "LPE I2S audio and High Definition Audio functionality are mutually exclusive, only one
of them can be enabled simultaneously." Does it mean that if I already use HDA to connect to an Audio CODEC, I2S2& I2S6 have no function or just I2S6?