Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l4+/STM32L4R9/DSI/DSI_WPCR4#0x0
DSI Wrapper PHY Configuration Register 4
tCLK-POST
https://github.com/modm-io/cmsis-svd-stm32