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Link port DMA Descriptor mode

Hi Processor support Team,

                        We are using adsp-21569 processor for our application firmware, In that for receiving bulk data from FPGA continuously Link port DMA is used.

DMA Descriptor list mode is used for data transfer, we have configured a list of descriptors(4 descriptors) in circular mode to accomplish this task. On receiving the data we found that only in the first descriptor(1st buffer) data was found to be zero and data was fine in the remaining descriptors(2nd and 3rd and 4th buffers).

Link port descriptor DMA sample was referred from ADSP-21569 EZ kit. we have modified the sample in circular mode for continuous reception.

Iam I missing something, help me to sort out this issue.

Regards,

Vignesh.