linux-kernel - Re: [PATCH v7 6/7] PCI: qcom: Disable ASPM L0s and remove BDF2SID mapping config for X1E80100 SoC

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Message-ID: <58e5dbbf-7c35-49ae-b2ff-954fc0e3fe48@quicinc.com>
Date: Wed, 30 Oct 2024 15:56:42 +0800
From: Qiang Yu <quic_qianyu@...cinc.com>
To: Johan Hovold <johan@...nel.org>,
        Manivannan Sadhasivam
	<manivannan.sadhasivam@...aro.org>
CC: <vkoul@...nel.org>, <kishon@...nel.org>, <robh@...nel.org>,
        <andersson@...nel.org>, <konradybcio@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <mturquette@...libre.com>, <sboyd@...nel.org>,
        <abel.vesa@...aro.org>, <quic_msarkar@...cinc.com>,
        <quic_devipriy@...cinc.com>, <dmitry.baryshkov@...aro.org>,
        <kw@...ux.com>, <lpieralisi@...nel.org>, <neil.armstrong@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <johan+linaro@...nel.org>, <stable@...r.kernel.org>
Subject: Re: [PATCH v7 6/7] PCI: qcom: Disable ASPM L0s and remove BDF2SID
 mapping config for X1E80100 SoC


On 10/30/2024 3:42 PM, Johan Hovold wrote:
> On Wed, Oct 30, 2024 at 12:48:51PM +0530, Manivannan Sadhasivam wrote:
>> On Wed, Oct 30, 2024 at 08:15:05AM +0100, Johan Hovold wrote:
>>> Also, are there any Qualcomm platforms that actually support L0s?
>>> Perhaps we should just disable it everywhere?
>> Most of the mobile chipsets from Qcom support L0s. It is not supported only on
>> the compute ones. So we cannot disable it everywhere.
>>
>> Again, it is not the hw issue but the PHY init sequence not tuned support L0s.
> Right, this should be mentioned in the commit message.
OK, I got it. Will write this into commit message.

Thanks,
Qiang Yu
>
> Johan