linux-kernel - Re: [PATCH v3] PCI: mediatek-gen3: Disable DVFSRC voltage request

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Date:   Mon, 29 Nov 2021 12:10:50 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Jianjun Wang <jianjun.wang@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, Ryan-JH.Yu@...iatek.com,
        qizhong.cheng@...iatek.com, Tzung-Bi Shih <tzungbi@...gle.com>,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v3] PCI: mediatek-gen3: Disable DVFSRC voltage request

On Fri, 15 Oct 2021 14:36:02 +0800, Jianjun Wang wrote:
> When the DVFSRC (dynamic voltage and frequency scaling resource collector)
> feature is not implemented, the PCIe hardware will assert a voltage request
> signal when exit from the L1 PM Substates to request a specific Vcore
> voltage, but cannot receive the voltage ready signal, which will cause
> the link to fail to exit the L1 PM Substates.
> 
> Disable DVFSRC voltage request by default, we need to find a common way to
> enable it in the future.
> 
> [...]

Applied to pci/mediatek-gen3, thanks!

[1/1] PCI: mediatek-gen3: Disable DVFSRC voltage request
      https://git.kernel.org/lpieralisi/pci/c/ab344fd43f

Thanks,
Lorenzo