[alsa-devel] [PATCH 2/8] ASoC : dwc : add different playback/capture base

[Mark Brown]

On Thu, Oct 08, 2015 at 12:12:35PM -0400, Alex Deucher wrote:
> From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu at amd.com>
> 
> Some platforms (Ex: AMD CZ) can have separate dwc controllers with
> different base address for playback and capture. This patch adds
> necessary changes to support it. Platforms which make use of it can
> supply a quirk in platform data to make use of this. By default,
> playback and capture base addesses are assumed to be same.

If these are two physically separate controllers that don't share
anything then why are they being represented as a single device as
opposed to just having two devices, one for playback and one for
capture?  You'd still need to register the DAI differently but it should
be a much less invasive change and map much more naturally onto the
device model (what if some system has put playback and capture into
separate power domains for example?).

If we do go with this then we will also need an update to the DT binding
to document how the additional resources associated with the second
controller are described.
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