linux-kernel - Re: [PATCH 1/1] iommu/arm-smmu: Implement qcom,skip-init

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Message-ID: <20200721235650.GN388985@builder.lan>
Date:   Tue, 21 Jul 2020 16:56:50 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Konrad Dybcio <konradybcio@...il.com>
Cc:     Will Deacon <will@...nel.org>, skrzynka@...radybcio.pl,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH 1/1] iommu/arm-smmu: Implement qcom,skip-init

On Tue 21 Jul 09:20 PDT 2020, Konrad Dybcio wrote:

> >The current
> >focus has been on moving more of the SMMU specific bits into the arm-smmu-qcom
> >implementation [1] and I think that is the right way to go.
> 
> Pardon if I overlooked something obvious, but I can't seem to find a
> clean way for implementing qcom,skip-init in arm-smmu-qcom, as neither
> the arm_smmu_test_smr_masks nor the probe function seem to be
> alterable with arm_smmu_impl. I'm open to your ideas guys.
> 

Is the problem on SDM630 that when you write to SMR/S2CR the device
reboots? Or that when you start writing out the context bank
configuration that trips the display and the device reboots?

Regards,
Bjorn