Hi Thomas,
The Parity enable and parity type are configured with PREN and PROE fields of UARTx_UCR2 register, described on chapter 16.2.13.4 of the i.MX8M Mini Reference Manual.

Hope this will be useful for you.
Best regards!
/Carlos
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
-------------------------------------------------------------------------------