dmaengine: bcm2835: Fix cyclic DMA period splitting

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The code responsible for splitting periods into chunks that
can be handled by the DMA controller missed to update total_len,
the number of bytes processed in the current period, when there
are more chunks to follow.

Therefore total_len was stuck at 0 and the code didn't work at all.
This resulted in a wrong control block layout and audio issues because
the cyclic DMA callback wasn't executing on period boundaries.

Fix this by adding the missing total_len update.

Signed-off-by: Matthias Reichl <hias@horus.com>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Tested-by: Clive Messer <clive.messer@digitaldreamtime.co.uk>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

...

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Matthias Reichl 2017-02-20 20:01:16 +01:00 • committed by Vinod Koul

parent c1ae3cfa0e

commit 2201ac6129

1 changed files with 4 additions and 1 deletions

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drivers/dma/bcm2835-dma.c

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