Re: [PATCH v5 4/4] arm64: dts: qcom: add HDMI nodes for msm8998

From: Konrad Dybcio <konrad.dybcio@linaro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Marc Gonzalez <mgonzalez@freebox.fr>
Cc: Vinod Koul <vkoul@kernel.org>,
	Kishon Vijay Abraham I <kishon@kernel.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Rob Clark <robdclark@gmail.com>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	Sean Paul <sean@poorly.run>,
	Marijn Suijten <marijn.suijten@somainline.org>,
	David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Bjorn Andersson <andersson@kernel.org>,
	linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
	devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org,
	freedreno@lists.freedesktop.org, Arnaud Vrac <avrac@freebox.fr>,
	Pierre-Hugues Husson <phhusson@freebox.fr>,
	Jeffrey Hugo <quic_jhugo@quicinc.com>
Subject: Re: [PATCH v5 4/4] arm64: dts: qcom: add HDMI nodes for msm8998
Date: Tue, 23 Jul 2024 13:45:53 +0200	[thread overview]
Message-ID: <04ef978f-2bfd-46cc-a9f7-40a6f1c507f8@linaro.org> (raw)
In-Reply-To: <CAA8EJpprtmefNM_CJFRbYVNxOWUVVWbedBq44r7GXOdDrQ2WjA@mail.gmail.com>

On 23.07.2024 11:59 AM, Dmitry Baryshkov wrote:
> On Tue, 23 Jul 2024 at 12:48, Marc Gonzalez <mgonzalez@freebox.fr> wrote:
>>
>> On 16/07/2024 18:37, Dmitry Baryshkov wrote:
>>
>>> No, that's fine. It is the SMMU issue that Konrad has been asking you
>>> to take a look at.
>>
>> Context:
>>
>> [    4.911422] arm-smmu cd00000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x0
>> [    4.923353] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1]
>> [    4.927893] arm-smmu cd00000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x0
>> [    4.941928] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1]
>> [    4.944438] arm-smmu cd00000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x0
>> [    4.956013] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1]
>> [    4.961055] arm-smmu cd00000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x0
>> [    4.974565] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1]
>> [    4.977628] arm-smmu cd00000.iommu: FSR    = 00000402 [Format=2 TF], SID=0x0
>> [    4.989670] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1]
>>
>>
>> As I mentioned, I don't think I've ever seen issues from cd00000.iommu
>> on my board.
> 
> Interestingly enough, I can also see iommu errors during WiFi startup
> / shutdown on msm8998 / miix630. This leads me to thinking that it
> well might be that there is a missing quirk in the iommu driver.
> 
>>
>> I can test a reboot loop for a few hours, to see if anything shows up.
> 
> Yes, pleas.

Yeah I do trust you Marc that it actually works for you and I'm not
gonna delay this series because of that, but please go ahead and
reboot-loop your board

8998/660 is """famous""" for it's iommu problems

Konrad