Maxime Ripard cb8cea513c
dmaengine: Create a generic dma_slave_caps callback ...
dma_slave_caps is very important to the generic layers that might interact with
dmaengine, such as ASoC. Unfortunately, it has been added as yet another
dma_device callback, and most of the existing drivers haven't implemented it,
reducing its reliability.
Introduce a generic behaviour to implement this, that rely on both the split of
device_control to derive which functions are supported and on new variables to
be set in the dma_device structure.
These variables holds what used to be the capabilities, that were set
per-channel. However, this proved to be a bit overkill, since every driver
filling these so far were hardcoding it, disregarding which channel was
actually given.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com >
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com >
Signed-off-by: Vinod Koul <vinod.koul@intel.com >
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