On Wed, Oct 01, 2014 at 10:27:05AM +0200, Maxime Ripard wrote:

On Sat, Sep 27, 2014 at 10:28:47AM +0100, Russell King - ARM Linux wrote:

quoted

The only way to do this is to either have a flag day, fixing all drivers
at once (which isn't going to happen) or leave the caps code as-is, and
provide a library function which drivers can hook into the caps callback
which retrieves the information from dma_device.

That way, DMA engine drivers which are using the new method can just
install the new function, and those which haven't been updated with
capabilities can carry on as they are, and are detectable to drivers.

Which is pretty much the current behaviour, isn't it?

Yes, because the ASoC code has obviously already thought about this and
solved the lack-of-caps-function problem in a way that permits existing
solutions to continue working.

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