Messages in this thread Patch in this message | | | Date | Fri, 15 Jul 2022 13:54:40 +0530 | From | Manivannan Sadhasivam <> | Subject | Re: [PATCH v2] PCI: qcom: Allow L1 and its sub states |
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On Wed, Jun 15, 2022 at 06:45:39PM +0530, Krishna chaitanya chundru wrote: > Allow L1 and its sub-states in the qcom pcie driver. > By default this is disabled in the hardware. So enabling it explicitly. >
You are enabling L1ss for controllers belonging to 2_7_0, so this should be mentioned in the commit message. Otherwise, it will imply that the L1ss is added for all controller versions.
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> > ---
Change log should be added here for versions > 1.
Thanks, Mani
> drivers/pci/controller/dwc/pcie-qcom.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c > index 6ab9089..0d8efcc 100644 > --- a/drivers/pci/controller/dwc/pcie-qcom.c > +++ b/drivers/pci/controller/dwc/pcie-qcom.c > @@ -41,6 +41,9 @@ > #define L23_CLK_RMV_DIS BIT(2) > #define L1_CLK_RMV_DIS BIT(1) > > +#define PCIE20_PARF_PM_CTRL 0x20 > +#define REQ_NOT_ENTR_L1 BIT(5) > + > #define PCIE20_PARF_PHY_CTRL 0x40 > #define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16) > #define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16) > @@ -1267,6 +1270,11 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) > val |= BIT(4); > writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL); > > + /* Enable L1 and L1ss */ > + val = readl(pcie->parf + PCIE20_PARF_PM_CTRL); > + val &= ~REQ_NOT_ENTR_L1; > + writel(val, pcie->parf + PCIE20_PARF_PM_CTRL); > + > if (IS_ENABLED(CONFIG_PCI_MSI)) { > val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); > val |= BIT(31); > -- > 2.7.4 >
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