On Mon, Oct 12, 2020 at 04:55:27PM +0300, Andy Shevchenko wrote:
> Currently those drivers need to do something like:
> if (of_property_is_present("dma-names"))
> ret = try DMA mode;
> else
> ret = try PIO mode;
> but this seems to me a bit stricter than needed. What if DMA mode fails, shall
> we fail the probe of the driver?
They can also just try registering DMA and fall back to PIO.
> If ASoC supports optional DMA resources, above can be simplified to something
> like:
> ret = try DMA mode;
> if (ret != DMA mode ok)
> ret = try PIO mode;
> which makes OF dependent parts gone along with relying on the properties rather
> than real resource availability.
I don't understand the blocker to writing that code at the minute?
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