imx6 UART DMA issue on 5.4 kernel

chandrajeet — Thu, 16 Jun 2022 09:18:04 GMT

Hi all,

In my project ttymxc2 is used to communicate at 2000000 baudrate to external device.

In kernel 4.9 it was working fine but when we ported to 5.4 it started giving issue.

After doing some searching online, i tried to disable the serial port dma in device tree

Then my machine's UART port started working on kernel 5.4

I am not understanding

why by removing the dma it starts working?

How to make it work with the DMA enabled?

Thank you

Regards,

Chandrajeet.

i.MX Processorsのトピックimx6 UART DMA issue on 5.4 kernel