linux-kernel - Re: [PATCH 0/7] clk: qcom: gcc: Do not turn off PCIe GDSCs during gdsc

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Message-ID: <mdy2edlneqivwjsi52ildqcnrprbqc57ghtuwtc7mmuru7ajhz@tdo6jts52soh>
Date: Mon, 5 Jan 2026 10:45:28 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
To: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Taniya Das <quic_tdas@...cinc.com>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>,
        Shazad Hussain <quic_shazhuss@...cinc.com>,
        Sibi Sankar <sibi.sankar@....qualcomm.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Melody Olvera <quic_molvera@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Taniya Das <taniya.das@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        Abel Vesa <abelvesa@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rajendra Nayak <quic_rjendra@...cinc.com>, stable@...r.kernel.org
Subject: Re: [PATCH 0/7] clk: qcom: gcc: Do not turn off PCIe GDSCs during
 gdsc_disable()

On Fri, Jan 02, 2026 at 03:13:00PM +0530, Krishna Chaitanya Chundru wrote:
> With PWRSTS_OFF_ON, PCIe GDSCs are turned off during gdsc_disable(). This
> can happen during scenarios such as system suspend and breaks the resume
> of PCIe controllers from suspend.
> 
> So use PWRSTS_RET_ON to indicate the GDSC driver to not turn off the GDSCs
> during gdsc_disable() and allow the hardware to transition the GDSCs to
> retention when the parent domain enters low power state during system
> suspend.
> 
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>

Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>

- Mani

> ---
> Krishna Chaitanya Chundru (7):
>       clk: qcom: gcc-sc7280: Do not turn off PCIe GDSCs during gdsc_disable()
>       clk: qcom: gcc-sa8775p: Do not turn off PCIe GDSCs during gdsc_disable()
>       clk: qcom: gcc-sm8750: Do not turn off PCIe GDSCs during gdsc_disable()
>       clk: qcom: gcc-glymur: Do not turn off PCIe GDSCs during gdsc_disable()
>       clk: qcom: gcc-qcs8300: Do not turn off PCIe GDSCs during gdsc_disable()
>       clk: qcom: gcc-x1e80100: Do not turn off PCIe GDSCs during gdsc_disable()
>       clk: qcom: gcc-kaanapali: Do not turn off PCIe GDSCs during gdsc_disable()
> 
>  drivers/clk/qcom/gcc-glymur.c    | 16 ++++++++--------
>  drivers/clk/qcom/gcc-kaanapali.c |  2 +-
>  drivers/clk/qcom/gcc-qcs8300.c   |  4 ++--
>  drivers/clk/qcom/gcc-sa8775p.c   |  4 ++--
>  drivers/clk/qcom/gcc-sc7280.c    |  2 +-
>  drivers/clk/qcom/gcc-sm8750.c    |  2 +-
>  drivers/clk/qcom/gcc-x1e80100.c  | 16 ++++++++--------
>  7 files changed, 23 insertions(+), 23 deletions(-)
> ---
> base-commit: 98e506ee7d10390b527aeddee7bbeaf667129646
> change-id: 20260102-pci_gdsc_fix-1dcf08223922
> 
> Best regards,
> -- 
> Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> 

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