Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x7_CM4/OTG_HS_DEVICE/OTG_HS_DIEPDMA6#0x0
OTG Device channel-x DMA address register
https://github.com/cmsis-svd/cmsis-svd-data