Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6M3AH/SDHI0/SD_DMAEN#0x0
DMAEN=0
DMA Mode Enable Register
SD_BUF Read/Write DMA Transfer
0 (0): The SD_BUF read/write DMA transfer is disabled.
1 (1): The SD_BUF read/write DMA transfer is enabled.
https://github.com/cmsis-svd/cmsis-svd-data