Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f4/STM32F469/DSIHOST/DSI_GVCIDR#0x0
DSI Host generic VCID register
Virtual channel ID This field indicates the generic interface read-back virtual channel identification.
https://github.com/modm-io/cmsis-svd-stm32