linux-kernel - Re: [PATCH] PCI: qcom: Clear ASPM L0s CAP for MSM8996 SoC

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Message-ID: <utecia46qscniiapbki6nonn24pr7rimxh5mkptkbj27ohvgsv@6fftnshj3rjs>
Date: Wed, 26 Nov 2025 10:47:39 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
Cc: mani@...nel.org, lpieralisi@...nel.org, kwilczynski@...nel.org,
        bhelgaas@...gle.com, robh@...nel.org, linux-pci@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: qcom: Clear ASPM L0s CAP for MSM8996 SoC

On Wed, Nov 26, 2025 at 01:47:18PM +0530, Manivannan Sadhasivam wrote:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> 
> Though I couldn't confirm the ASPM L0s support with the Qcom hardware team,
> bug report from Dmitry suggests that L0s is broken on this legacy SoC.
> Hence, clear the L0s CAP for the Root Ports in this SoC.
> 
> Since qcom_pcie_clear_aspm_l0s() is now used by more than one SoC config,
> call it from qcom_pcie_host_init() instead.
> 
> Reported-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> Closes: https://lore.kernel.org/linux-pci/4cp5pzmlkkht2ni7us6p3edidnk25l45xrp6w3fxguqcvhq2id@wjqqrdpkypkf
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 

Tested-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>

Thanks!

-- 
With best wishes
Dmitry