Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l4+/STM32L4R5/GFXMMU/B2CR#0x0
Graphic MMU buffer 2 configuration register
Physical buffer offset
Physical buffer base address
https://github.com/modm-io/cmsis-svd-stm32