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how to enable dma transmission in serial?

yanhong wu
Intellectual 350 points

Hi all,

I test on am3517evm with TI-Android-GingerBread-2.3.4(kernel:2.6.37).

I have made the following modifications:
file:TI_Android_GingerBread_2_3_4Sources/kernel/arch/arm/mach-omap2/serial.c
line:785
form "omap_up.dma_enabled = uart->dma_enabled;" to "omap_up.dma_enabled = 1;"

Now,it has data loss situation in receive mode.

What i need to modify to enable dma transmission in serial?