| Message ID | 1694066433-8677-5-git-send-email-quic_krichai@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | PCI: qcom: Add support for OPP | expand |
On Thu, Sep 07, 2023 at 11:30:32AM +0530, Krishna chaitanya chundru wrote: > Return error from the function if the icc path is specified in the > dt and icc_set_bw failed or link is not up. > > Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> > --- > drivers/pci/controller/dwc/pcie-qcom.c | 23 ++++++++++++----------- > 1 file changed, 12 insertions(+), 11 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c > index e2f2940..ca6350b 100644 > --- a/drivers/pci/controller/dwc/pcie-qcom.c > +++ b/drivers/pci/controller/dwc/pcie-qcom.c > @@ -1357,22 +1357,21 @@ static int qcom_pcie_icc_init(struct qcom_pcie *pcie) > return 0; > } > > -static void qcom_pcie_icc_update(struct qcom_pcie *pcie) > +static int qcom_pcie_icc_update(struct qcom_pcie *pcie) > { > struct dw_pcie *pci = pcie->pci; > u32 offset, status, bw; > int speed, width; > - int ret; > > if (!pcie->icc_mem) > - return; > + return 0; > > offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); > status = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA); > > /* Only update constraints if link is up. */ > if (!(status & PCI_EXP_LNKSTA_DLLLA)) > - return; > + return -ENODEV; Why would you want to fail if the link is not up? This will break the driver if device shows up later. - Mani > > speed = FIELD_GET(PCI_EXP_LNKSTA_CLS, status); > width = FIELD_GET(PCI_EXP_LNKSTA_NLW, status); > @@ -1392,11 +1391,7 @@ static void qcom_pcie_icc_update(struct qcom_pcie *pcie) > break; > } > > - ret = icc_set_bw(pcie->icc_mem, 0, width * bw); > - if (ret) { > - dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n", > - ret); > - } > + return icc_set_bw(pcie->icc_mem, 0, width * bw); > } > > static int qcom_pcie_link_transition_count(struct seq_file *s, void *data) > @@ -1529,7 +1524,10 @@ static int qcom_pcie_probe(struct platform_device *pdev) > goto err_phy_exit; > } > > - qcom_pcie_icc_update(pcie); > + ret = qcom_pcie_icc_update(pcie); > + if (ret) > + dev_err(dev, "failed to update interconnect bandwidth: %d\n", > + ret); > > if (pcie->mhi) > qcom_pcie_init_debugfs(pcie); > @@ -1596,7 +1594,10 @@ static int qcom_pcie_resume_noirq(struct device *dev) > pcie->suspended = false; > } > > - qcom_pcie_icc_update(pcie); > + ret = qcom_pcie_icc_update(pcie); > + if (ret) > + dev_err(dev, "failed to update interconnect bandwidth: %d\n", > + ret); > > return 0; > } > -- > 2.7.4 >
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index e2f2940..ca6350b 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1357,22 +1357,21 @@ static int qcom_pcie_icc_init(struct qcom_pcie *pcie) return 0; } -static void qcom_pcie_icc_update(struct qcom_pcie *pcie) +static int qcom_pcie_icc_update(struct qcom_pcie *pcie) { struct dw_pcie *pci = pcie->pci; u32 offset, status, bw; int speed, width; - int ret; if (!pcie->icc_mem) - return; + return 0; offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); status = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA); /* Only update constraints if link is up. */ if (!(status & PCI_EXP_LNKSTA_DLLLA)) - return; + return -ENODEV; speed = FIELD_GET(PCI_EXP_LNKSTA_CLS, status); width = FIELD_GET(PCI_EXP_LNKSTA_NLW, status); @@ -1392,11 +1391,7 @@ static void qcom_pcie_icc_update(struct qcom_pcie *pcie) break; } - ret = icc_set_bw(pcie->icc_mem, 0, width * bw); - if (ret) { - dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n", - ret); - } + return icc_set_bw(pcie->icc_mem, 0, width * bw); } static int qcom_pcie_link_transition_count(struct seq_file *s, void *data) @@ -1529,7 +1524,10 @@ static int qcom_pcie_probe(struct platform_device *pdev) goto err_phy_exit; } - qcom_pcie_icc_update(pcie); + ret = qcom_pcie_icc_update(pcie); + if (ret) + dev_err(dev, "failed to update interconnect bandwidth: %d\n", + ret); if (pcie->mhi) qcom_pcie_init_debugfs(pcie); @@ -1596,7 +1594,10 @@ static int qcom_pcie_resume_noirq(struct device *dev) pcie->suspended = false; } - qcom_pcie_icc_update(pcie); + ret = qcom_pcie_icc_update(pcie); + if (ret) + dev_err(dev, "failed to update interconnect bandwidth: %d\n", + ret); return 0; }
Return error from the function if the icc path is specified in the dt and icc_set_bw failed or link is not up. Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> --- drivers/pci/controller/dwc/pcie-qcom.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-)