default or selected kernelversion does not have config value CONFIG_SERIAL_BFIN_DMA.
Result is shown for kernelversion 6.7-rc3
DMA mode
configname: CONFIG_SERIAL_BFIN_DMA
UART Mode
└─>DMA mode
In linux kernel since version 2.6.24 (release Date: 2008-01-24)
This driver works under DMA mode. If this option is selected, the
blackfin simple dma driver is also enabled.
blackfin simple dma driver is also enabled.