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From:   Laura Nao <laura.nao@collabora.com>
To:     mathieu.poirier@linaro.org
Cc:     Project_Global_Chrome_Upstream_Group@mediatek.com,
        andersson@kernel.org, angelogioacchino.delregno@collabora.com,
        conor+dt@kernel.org, devicetree@vger.kernel.org,
        krzysztof.kozlowski+dt@linaro.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mediatek@lists.infradead.org,
        linux-remoteproc@vger.kernel.org, matthias.bgg@gmail.com,
        robh+dt@kernel.org, tinghan.shen@mediatek.com, kernel@collabora.com
Subject: Re: [PATCH v17 00/14] Add support for MT8195 SCP 2nd core
Date:   Mon, 18 Sep 2023 12:31:41 +0200
Message-Id: <20230918103141.126271-1-laura.nao@collabora.com>
In-Reply-To: <ZQH2dG+l/dONUsyi@p14s>
References: <ZQH2dG+l/dONUsyi@p14s>
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> Other than patch 2 and 14, I have applied this set.  The remaining patches will
> have to be resent to Matthias.

> Thanks,
> Mathieu

Hello,

With patch 2 missing, the SCP is not probed correctly anymore on asurada (MT8192) and kukui (MT8183). The mtk-scp driver relies on the existence of the `cros-ec-rpmsg` node in the dt to determine if the SCP is single or multicore. Without patch 2 the driver wrongly assumes the SCP on MT8192 and MT8183 are multicore, leading to the following errors during initialization:   

10696 04:33:59.126671  <3>[   15.465714] platform 10500000.scp:cros-ec: invalid resource (null)
10697 04:33:59.142855  <3>[   15.478560] platform 10500000.scp:cros-ec: Failed to parse and map sram memory
10698 04:33:59.149650  <3>[   15.486121] mtk-scp 10500000.scp: Failed to initialize core 0 rproc

The issue was caught by KernelCI, complete logs can be found here:
- asurada: https://storage.kernelci.org/next/master/next-20230914/arm64/defconfig+arm64-chromebook+videodec/gcc-10/lab-collabora/baseline-nfs-mt8192-asurada-spherion-r0.html
- kukui: https://storage.kernelci.org/next/master/next-20230914/arm64/defconfig+arm64-chromebook+videodec/gcc-10/lab-collabora/baseline-nfs-mt8183-kukui-jacuzzi-juniper-sku16.html

Reporting the issue so that patch 2 and 14 can be resent and merged soon.

Best,

Laura