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

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Message-ID: <87edk4d8qp.fsf@intel.com>
Date:   Tue, 15 Aug 2023 11:12:46 +0300
From:   Jani Nikula <jani.nikula@...el.com>
To:     imre.deak@...el.com,
        Linux regressions mailing list <regressions@...ts.linux.dev>
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 Mon, 14 Aug 2023, Imre Deak <imre.deak@...el.com> wrote:
> 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?

It's fine by me, but need drm-misc maintainer ack to merge [1] via
drm-intel.

BR,
Jani.

>
>> * 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
>> 

-- 
Jani Nikula, Intel Open Source Graphics Center