linux-kernel - Re: [PATCH 1/2] Revert "drm/msm/dpu: support plane splitting in quad-pipe case"

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Message-ID: <CABymUCPi6e0NUKcmf6ArY1qtMj29BU91kzyb31_RHqXNffxoCA@mail.gmail.com>
Date: Tue, 30 Dec 2025 22:32:26 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Abel Vesa <abel.vesa@....qualcomm.com>
Cc: Rob Clark <robin.clark@....qualcomm.com>, Dmitry Baryshkov <lumag@...nel.org>, 
	Abhinav Kumar <abhinav.kumar@...ux.dev>, Jessica Zhang <jesszhan0024@...il.com>, 
	Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, linux-arm-msm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] Revert "drm/msm/dpu: support plane splitting in
 quad-pipe case"

Abel Vesa <abel.vesa@....qualcomm.com> 于2025年12月19日周五 18:39写道：
>
> This reverts commit 5978864e34b66bdae4d7613834c03dd5d0a0c891.
>
> At least on Hamoa based devices, there are IOMMU faults:
>
> arm-smmu 15000000.iommu: Unhandled context fault: fsr=0x402, iova=0x00000000, fsynr=0x3d0023, cbfrsynra=0x1c00, cb=13
> arm-smmu 15000000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x1c00
> arm-smmu 15000000.iommu: FSYNR0 = 003d0023 [S1CBNDX=61 PNU PLVL=3]
>
> While on some of these devices, there are also all sorts of artifacts on eDP.

Hi Abel,

Could you help check what's the pipe topology of your eDP case? I need
to reproduce the issue.
Or could you help share the content of
/sys/kernel/debug/dri/ae01000.display-controller/state?
Thanks!

Regards,
Jun