Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h7/STM32H7A3/RCC/RCC_APB3RSTR#0x0
LTDCRST=B_0x0
LTDC block reset Set and reset by software.
0 (B_0x0): does not reset the LTDC block (default after reset)
1 (B_0x1): resets the LTDC block
https://github.com/modm-io/cmsis-svd-stm32