Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/SiM3_NRND/SIM3L168_A/I2C_0/I2CDMA#0x0
DMAEN=DISABLED
DMA Configuration
DMA Transfer Length.
DMA Mode Enable.
0 (DISABLED): Disable I2C DMA data requests.
1 (ENABLED): Enable I2C DMA data requests.
https://github.com/cmsis-svd/cmsis-svd-data