Data was not completely moved to destination when using EDMA3 LLD

This looks like cache coherency issue, assuming the input buffer resides in external memory.

1. make sure that 'after' you initialize the input buffer before issuing a DMA transfer you do a Cache write-back of the input buffer.

2. make sure that the input buffer start and end addresses are cache-line size aligned (128-byte boundaries).

Cache coherency issues can arise due to the way EDMA transfers work. EDMA will transfer the data directly from the physical memory, so if you have dirty cache lines due to CPU writes the transfered data will not be coherent with respect to the contents of your local processor cache. Note that this will happen if you initialize memory or do dynamic memory allocation which initialize allocated memory.

Finally, you are not reporting an issue with this, but on the 'reader' side similarly you need to Cache invalidate any external memory buffer that have been written to using EDMA transfers. If you don't do this and there are resident cache lines in your local processor cache due to an earlier CPU access, then CPU will read 'stale' data from the cache line instead of the newly DMA'ed in data sitting in external memory.

Hope this helps,

Murat