From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92B284502A for ; Mon, 16 Feb 2026 10:47:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771238823; cv=none; b=U3rzpxWM8JRtYof8hqmMZ4GGAHR6IoSJjW5yUrodTFEvpJyLx7I0YYeLfDo2kBGNlvsEHmYXGHGfyGZY1LDCWjeOUaL7XIpIWvjB3oSNnmi0lr5GhpCkd8yA36v01Q6YY19BLOtpnLDZr4oVeyDoPM10wy8vkcR3KShE4jkSmN8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771238823; c=relaxed/simple; bh=Zzin5ThTM9Imyf75zYHV+Tk+Fha+1QurOEuuq7ZkmWQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=bnR0jlUBMWy64sZytsujAs6WKuFRubuLMELImG38NZsN5bq6rVDT5JJDmiGSRTA6IdJBcJH2CL8m1KYBdCq1ufcqQA/+MQDov+Jl8heHIMFp5wCIkMXoeafV/+CdYj+8HkFreVMPFz20Xnqv6tWSqw0c/fOFwHOnbfaeesK80aU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=fT7TaQ0C; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="fT7TaQ0C" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1771238820; bh=Zzin5ThTM9Imyf75zYHV+Tk+Fha+1QurOEuuq7ZkmWQ=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=fT7TaQ0C/ikyDEBGY2C7G+7P/fo4AtNST7bMbWiKDKrmMe+1gy65BjnWZ54PG1+SE qQDSOTWFjnImyYE30/10pcSWSECaBtFIDN0LThfDdpr7NZIokMjZMuyvPU8zmaaSNL lbcY1b1SCUMDf7J2pbOWZM4w0D9pY6Hrmk51j5J0UwJMFJN6i9XBLi53U9hrav2InY oNpaqeAVirbCTqX25CntkeQaRHqIQG9amW2BSA902jnQuRw/Mqf7F1w+KKplsPLVyx rwimIZmdoETkP7/bYVZG8mWBi8h1UqreKXMrbdVpCXMjdU/bYVzkTaxSAGTdsVX6Gp 5MZMdzkuSwsqA== Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by bali.collaboradmins.com (Postfix) with ESMTPSA id 973AF17E1523; Mon, 16 Feb 2026 11:47:00 +0100 (CET) Message-ID: <86e2d0f9-5c25-4cce-b4a8-68fb569f987d@collabora.com> Date: Mon, 16 Feb 2026 11:46:59 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird 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 To: Thorsten Leemhuis , Denis Gessert Cc: Evans Jahja , Matthias Brugger , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, =?UTF-8?Q?Otto_Pfl=C3=BCger?= References: <908f3c03-a8b0-4535-9cfa-294c6ade8152@collabora.com> <96e7f0fc-65f4-4613-b556-3a2d869dabb4@leemhuis.info> From: AngeloGioacchino Del Regno Content-Language: en-US In-Reply-To: <96e7f0fc-65f4-4613-b556-3a2d869dabb4@leemhuis.info> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Il 13/02/26 10:27, Thorsten Leemhuis ha scritto: > On 2/9/26 12:42, AngeloGioacchino Del Regno wrote: >> Il 06/02/26 17:58, Denis Gessert ha scritto: >>> Thanks for the quick response. I compiled 6.18.9 with this patch >>> (without reverting the previous commit) and it boots successfully. >> >> Well, I missed all those replies to this thread, and sent a redundant reply >> saying .. well, the same as Thorsten (hey, thanks for being faster than >> me!). > > Happens. :-D > >> Happy to see further confirmation that the patch that we both mentioned is >> actually fixing the issue. > > The big question remains: Now that this landed in mainline, should we as > the stable team to pick this up for 6.18.y and 6.19.y to get it resolved > there quickly? They might pick it up on their own due to the Fixes tag, > but that is not guaranteed. > Yes, please, that'd be great. Cheers, Angelo > Ciao, Thorsten > >>> Am Fr., 6. Feb. 2026 um 15:55 Uhr schrieb Thorsten Leemhuis >>> : >>>> >>>> On 2/6/26 12:33, Denis Gessert wrote: >>>>> >>>>> 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 >>>>> >>>>> 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. >>>> >>>> There is a fix for it from Otto here that I guess should help >>>> https://lore.kernel.org/lkml/20260106-mt8183-display-graph-v2-1- >>>> e7e56054eef5@abscue.de/ >>>> >>>> Side note: lacks a stable tag and maybe should have been merged this >>>> cycle instead of the next. But given that 6.19 is immanent it might be >>>> good if this could be backported to 6.19.y once it landed in mainline. >>>> >>>>> PS: Apologies for the potential double-mail. >>>> No worries, happens. >>>> >>>> Ciao, Thortsten >> >> >> >