linux-kernel - Re: [REGRESSION] Black screen on HDMI power-cycle after commit 3471b9a31ce3 (7900XTX + LG C3)

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Message-ID: <CABXGCsMH-4mC9n-ZySb=QtCLkM0eSX1sKaDTzXT8cG9mFS0rRQ@mail.gmail.com>
Date: Mon, 8 Dec 2025 22:11:00 +0500
From: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To: "Pillai, Aurabindo" <Aurabindo.Pillai@....com>, amd-gfx list <amd-gfx@...ts.freedesktop.org>, 
	Linux List Kernel Mailing <linux-kernel@...r.kernel.org>
Cc: "Vojvodic, Relja (Reggie)" <Relja.Vojvodic@....com>, "Liu, Wenjing" <Wenjing.Liu@....com>, 
	"Deucher, Alexander" <Alexander.Deucher@....com>
Subject: Re: [REGRESSION] Black screen on HDMI power-cycle after commit
 3471b9a31ce3 (7900XTX + LG C3)

On Mon, Dec 8, 2025 at 9:42 PM Pillai, Aurabindo
<Aurabindo.Pillai@....com> wrote:
>
> [AMD Official Use Only - AMD Internal Distribution Only]
>
> Hi Mikhail,
>
> Turns out we had a followup fix for this issue: "drm/amd/display: Improve HDMI info retrieval". Do you have this in your tree?

Hi Aurabindo,

No, I do not have this commit in my tree. I am currently testing on
the mainline Linux repository (Torvalds' tree), and it seems this fix
hasn't landed there yet.

I just updated to the latest master (commit c2f2b01b74be) and searched
for it, but found nothing:
mikhail@...mary-ws ~/p/g/linux (master)> git remote -v
origin git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git (fetch)
origin git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git (push)

mikhail@...mary-ws ~/p/g/linux (master)> git log --all --grep="Improve
HDMI info retrieval" -i --oneline
mikhail@...mary-ws ~/p/g/linux (master)>

Could you please point me to the tree/branch where this fix is
located, or send it as a patch? I would be happy to apply it and test
if it resolves the regression.

--
Best Regards,
Mike Gavrilov.