linux-kernel - Re: [PATCH v1] PCI: qcom: Allow L1 and its sub states on qcom dwc wrapper

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Message-ID: <CAE-0n52hpKxMG=gq1rPGx0cM2VKNRo+WHVW+ExCScJ8UwZKgGA@mail.gmail.com>
Date:   Wed, 8 Jun 2022 15:17:54 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Krishna chaitanya chundru <quic_krichai@...cinc.com>,
        helgaas@...nel.org
Cc:     linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_vbadigan@...cinc.com,
        quic_hemantk@...cinc.com, quic_ramkri@...cinc.com,
        manivannan.sadhasivam@...aro.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v1] PCI: qcom: Allow L1 and its sub states on qcom dwc wrapper

Quoting Krishna chaitanya chundru (2022-06-03 00:18:50)
> Allow L1 and its sub-states in the qcom dwc pcie wrapper.
> By default its disabled. So enable it explicitly.
>

Would be good to add some more details about why it's disabled by
default. I guess it's disabled by default in the hardware and enabling
it is OK to do unconditionally for all qcom dwc pcie devices?