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: <56dcaa86-d4a6-4ba5-9dd4-adf8c057cb2c@collabora.com>
Date: Mon, 9 Feb 2026 12:06:39 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Denis Gessert <denisgessert@...il.com>,
 Thorsten Leemhuis <regressions@...mhuis.info>,
 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

Il 06/02/26 12:33, Denis Gessert ha scritto:
> 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

Hello Denis,

This patch should be resolving the issue -> 
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/arch/arm64/boot/dts/mediatek?h=next-20260205&id=be0b304eeb8c5f77e4f98f64e58729d879195f2f


Cheers,
Angelo