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

Dmitry Baryshkov
2024-07-23T13:10:52Z

On Tue, 23 Jul 2024 at 15:57, Marc Gonzalez <mgonzalez@freebox.fr> wrote:
>
> On 23/07/2024 13:45, Konrad Dybcio wrote:
>
> > On 23.07.2024 11:59 AM, Dmitry Baryshkov wrote:
> >
> >> On Tue, 23 Jul 2024 at 12:48, Marc Gonzalez 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, please.
> >
> > 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
>
> [ 20.501062] arm-smmu 16c0000.iommu: Unhandled context fault: fsr=0x402, iova=0x00000000, fsynr=0x1, cbfrsynra=0x1900, cb=0

I think 0x1900 is WiFi.

>
> I get the above warning pretty reliably.
> I don't think it's related to the issue(s) you mentioned.
> System just keeps plodding along.
>
> Regards
>

--
With best wishes
Dmitry