[alsa-devel] [PATCH] ASoC: change 'HDMI/DP, pcm=' to 'HDMI/DP, pcm=' Jack control names

[Mark Brown]

On Fri, Oct 25, 2019 at 04:28:26PM +0200, Takashi Iwai wrote:
> Jaroslav Kysela wrote:
> > Dne 25. 10. 19 v 16:06 Takashi Iwai napsal(a):

> > > Well, that's obviously against our dont-breaking-user-space rule.
> > > The UCM profiles have been widely used on Chromebooks, and they can't
> > > upgrade easily.

> > > So, I believe this is a case where we have to live with messes.

> > If we speak about Google's kernels, they can apply a revert (depends
> > on their upgrade/maintenance policy). If users use the standard Linux
> > distributions, then we are fine, don't we?

> No, we can't break the already existing user-space.  That's what Linus
> suggested repeatedly over years, too.

I agree.  There's some systems where we can get away with
incompatible changes as realistically the users are doing full
system upgrades and don't care but the Chromebooks definitely
aren't one of them, we've had issues reported with breakages on
them due to changes with the x86 DSP firmwares.  It's mainly
people sideloading a regular Linux userspace along with the
ChromeOS kernel AIUI.
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