linux-kernel - Re: 2b5d1c29f6c4 ("drm/nouveau/disp: PIOR DP uses GPIO for HPD, not PMGR AUX interrupts")

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Message-ID: <60ef0646-b0ab-b4e0-9eaa-a2c431c5d682@leemhuis.info>
Date:   Wed, 9 Aug 2023 16:04:07 +0200
From:   Thorsten Leemhuis <regressions@...mhuis.info>
To:     Takashi Iwai <tiwai@...e.de>, Karol Herbst <kherbst@...hat.com>
Cc:     nouveau@...ts.freedesktop.org, lkml <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org, Borislav Petkov <bp@...en8.de>,
        Ben Skeggs <bskeggs@...hat.com>
Subject: Re: 2b5d1c29f6c4 ("drm/nouveau/disp: PIOR DP uses GPIO for HPD, not
 PMGR AUX interrupts")

On 09.08.23 15:13, Takashi Iwai wrote:
> 
> If this can't be fixed quickly, I suppose it's safer to revert it from
> 6.4.y for now.  6.5 is still being cooked, but 6.4.x is already in
> wide deployment, hence the regression has to be addressed quickly.

Good luck with that. To quote
https://docs.kernel.org/process/handling-regressions.html :

```
Regarding stable and longterm kernels:

[...]

* Whenever you want to swiftly resolve a regression that recently also
made it into a proper mainline, stable, or longterm release, fix it
quickly in mainline; when appropriate thus involve Linus to fast-track
the fix (see above). That's because the stable team normally does
neither revert nor fix any changes that cause the same problems in mainline.
```

Note the "normally" in there, so there is a chance.

Ciao, Thorsten