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

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Message-ID: <CAMS8qEVXGddTdbrPwK3NJMx71HH0hoVyqiJG6-g9tiBRMRYZ8w@mail.gmail.com>
Date:   Wed, 22 Jul 2020 22:11:34 +0200
From:   Konrad Dybcio <konradybcio@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
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

>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?

I added some debug prints and the phone hangs after reaching the
seventh CB (with i=6) at

arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_FSR, ARM_SMMU_FSR_FAULT);

line in arm_smmu_device_reset.

Konrad