On Thu, Aug 23, 2012 at 02:26:19PM +0100, Lee Jones wrote:
I think Ola is suggesting probing the DMA driver from the machine which will also work though I'm not 100% sure if I'm parsing the above correctly. The issue in DT terms is that if the DMA controller is shared with a bunch of other IPs then it should have one node shared between them all and not a bunch of shim nodes inserted in the middle which only exists due to the way Linux instantiates stuff.
When you say 'machine', do you mean from arch/<arch>/mach-*? If so, I'm keen for that not to happen.
No, sound/soc/ux500/snowball.c or whatever. At least that's my guess.
They instantiate the PCM driver dynamically from the DAI when it's probed which is pretty much what you're patch is doing.
So they do it in the same why I have with this patch? Do you know why Ola might think this is a bad idea?
I'm not 100% sure, I'm guessing it might be down to the fact that you end up with multiple PCM drivers. We could avoid that with refcounting but nobody's really worried about it.