[v2,0/2] dmaengine: ti: edma: Polled completion support

Message

Peter Ujfalusi May 21, 2019, 7:59 a.m. UTC

Hi,

Changes since v1:
- Cleanup patch for the array register handling
- typo fixed in patch2 commit message

The code around the array register access was pretty confusing for the first
look, so clean them up first then use the cleaner way in the polled handling.

When a DMA client driver decides that it is not providing callback for
completion of a transfer (and/or does not set the DMA_PREP_INTERRUPT) but
it will poll the status of the transfer (in case of short memcpy for
example) we will not get interrupt for the completion of the transfer and
will not mark the transaction as done.

Check the event registers (ER and EER) and if the channel is inactive then
return wioth DMA_COMPLETE to let the client know that the transfer is
completed.

Regards,
Peter
---
Peter Ujfalusi (2):
  dmaengine: ti: edma: Clean up the 2x32bit array register accesses
  dmaengine: ti: edma: Enable support for polled (memcpy) completion

 drivers/dma/ti/edma.c | 129 ++++++++++++++++++++++++++----------------
 1 file changed, 81 insertions(+), 48 deletions(-)