linux-kernel - Re: [REGRESSION] HDMI connector detection broken in 6.3 on Intel(R) Celeron(R) N3060 integrated graphics

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Date:   Mon, 14 Aug 2023 17:35:13 +0300
From:   Imre Deak <imre.deak@...el.com>
To:     Linux regressions mailing list <regressions@...ts.linux.dev>,
        Jani Nikula <jani.nikula@...el.com>
Cc:     Mikhail Rudenko <mike.rudenko@...il.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [REGRESSION] HDMI connector detection broken in 6.3 on Intel(R)
 Celeron(R) N3060 integrated graphics

On Sun, Aug 13, 2023 at 03:41:30PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
Hi,

> On 11.08.23 20:10, Mikhail Rudenko wrote:
> > On 2023-08-11 at 08:45 +02, Thorsten Leemhuis <regressions@...mhuis.info> wrote:
> >> On 10.08.23 21:33, Mikhail Rudenko wrote:
> >>> The following is a copy an issue I posted to drm/i915 gitlab [1] two
> >>> months ago. I repost it to the mailing lists in hope that it will help
> >>> the right people pay attention to it.
> >>
> >> Thx for your report. Wonder why Dmitry (who authored a4e771729a51) or
> >> Thomas (who committed it) it didn't look into this, but maybe the i915
> >> devs didn't forward the report to them.
> 
> For the record: they did, and Jani mentioned already. Sorry, should have
> phrased this differently.
> 
> >> Let's see if these mails help. Just wondering: does reverting
> >> a4e771729a51 from 6.5-rc5 or drm-tip help as well?
> > 
> > I've redone my tests with 6.5-rc5, and here are the results:
> > (1) 6.5-rc5 -> still affected
> > (2) 6.5-rc5 + revert a4e771729a51 -> not affected
> > (3) 6.5-rc5 + two patches [1][2] suggested on i915 gitlab by @ideak -> not affected (!)
> > 
> > Should we somehow tell regzbot about (3)?
> 
> That's good to know, thx. But the more important things are:
> 
> * When will those be merged? They are not yet in next yet afaics, so it
> might take some time to mainline them, especially at this point of the
> devel cycle. Imre, could you try to prod the right people so that these
> are ideally upstreamed rather sooner than later, as they fix a regression?

I think the patches ([1] and [2]) could be merged via the drm-intel-next
(drm-intel-fixes) tree Cc'ing also stable. Jani, is this ok?

> * They if possible ideally should be tagged for backporting to 6.4, as
> this is a regression from the 6.3 cycle.
> 
> But yes, let's tell regzbot that fixes are available, too:
> 
> #regzbot fix: drm/i915: Fix HPD polling, reenabling the output poll work
> as needed
> 
> (for the record: that's the second of two patches apparently needed)
> 
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.
> 
> >> BTW, there was an earlier report about a problem with a4e771729a51 that
> >> afaics was never addressed, but it might be unrelated.
> >> https://lore.kernel.org/all/20230328023129.3596968-1-zhouzongmin@kylinos.cn/
> > [1] https://patchwork.freedesktop.org/patch/548590/?series=121050&rev=1
> > [2] https://patchwork.freedesktop.org/patch/548591/?series=121050&rev=1
>