Hi Andy,

quoted

I found the issue when testing DMA with the UART transferring different

amounts of data.

Can you tell more about the setup and test cases?

We had a loopback test from one uart to another. The test checks the
following transfer lengths (bytes):
1 to 33, 2043 to 2053, 4091 to 4101, 8187 to 8297, 16379 to 16389

I think 1 to 33 and 4095 to 4097 were enough to find the problem.

Also, which version of the DW DMAC IP is being used in this SoC?

I'm still checking, but it looks to be 2.18b

Thanks
Phil