[alsa-devel] [PATCH v2 2/3] ASoC: topology: Add topology core

[Mark Brown]

On Wed, May 27, 2015 at 09:23:03PM +0200, Lars-Peter Clausen wrote:

> Ideally we'd turn the dependency chain the other way around and have a
> snd_soc_dobj_widget struct which inherits snd_soc_dapm_widget and
> snd_soc_dobj. In the dobj callbacks you can then still use container_of to
> get it. This comes at the expense that we have to add a free() callback to
> snd_soc_dapm_widget. But it opens up the possibility to have other
> specialized widgets sub-classes. snd_soc_dapm_widget is already rather large
> given how many instance we have of it and quite a few of the fields are only
> used by a particular type of widget. Another good candidate for example
> would be the DAI link widget with all its params fields.

Yeah, I was thinking something along those lines might be good long term
but it's definitely a separate thing to getting the topology stuff in
and I started worrying about things like multiple inheritance.
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