[alsa-devel] [PATCH 2/3] ASoC: rockchip: Make RK3328 GPIO_MUTE control explicit

[Peter Geis]

On Thu, Feb 6, 2020 at 8:57 AM Mark Brown <broonie at kernel.org> wrote:
>
> On Thu, Feb 06, 2020 at 12:36:04PM +0000, Robin Murphy wrote:
> > On 2020-02-06 11:46 am, Mark Brown wrote:
>
> > > This makes sense but it is an ABI break so is going to need
> > > quirking for existing boards that unfortunately rely on the
> > > existing behaviour.
>
> > I guess the existing (mis)behaviour could be predicated on an
> > of_machine_is_compatible() check for Rock64 boards - it's ugly, but should
> > do the job if you feel it's more important to be 100% strict about not
> > regressing supported systems for any possible kernel/DTB combination.
>
> Yes, that's what I'm suggesting - we don't need to be exhaustive
> but having an obvious place for people to put the quirk in if
> they are affected is much better practice than just silently
> letting things break.

Might want to put a warning in there too, so that if someone is paying
attention they will see that they are using an out of date device
tree.