linux-kernel - Re: [REGRESSION] mt8183-kukui: dts: changes in dts caused display to no longer initialize - Was: Re: mt8183-kukui: drm/mediatek: dts: Invalid display hw pipeline when probing mediatek-drm

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Message-ID: <CAFLVeg_soeYV4tOYKMo6TMYOtuWWU4TFCjUTxUrVEyGcRwMz7A@mail.gmail.com>
Date: Fri, 6 Feb 2026 12:33:13 +0100
From: Denis Gessert <denisgessert@...il.com>
To: Thorsten Leemhuis <regressions@...mhuis.info>, 
	"angelogioacchino.delregno@...labora.com" <angelogioacchino.delregno@...labora.com>, 
	Matthias Brugger <matthias.bgg@...il.com>
Cc: Evans Jahja <evansjahja13@...il.com>, linux-mediatek@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, regressions@...ts.linux.dev
Subject: Re: [REGRESSION] mt8183-kukui: dts: changes in dts caused display to
 no longer initialize - Was: Re: mt8183-kukui: drm/mediatek: dts: Invalid
 display hw pipeline when probing mediatek-drm

Hi,

I found this email chain while troubleshooting why my Levovo Duet
(with the MT8183 chip) would not boot using any 6.18.* kernel.

I can confirm that on my device the current stable 6.18.8 does not
boot unless I revert the commit

commit e72d63fa0563f8a6e98c10fed3a9ce74dc0536e6 (HEAD)
Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Date:   Thu Jul 24 10:39:08 2025 +0200

    arm64: dts: mediatek: mt8183: Migrate to display controller OF graph

mentioned below. With the reverted commit the device boots as intended.

PS: Apologies for the potential double-mail. My first message bounced
because it was HTML, so I am sending it again text-only. (This is my
first time on the mailing list..)

Cheers,

Denis