| Message ID | 1653387228-28110-1-git-send-email-quic_kriskura@quicinc.com |
|---|---|
| Headers | show |
| Series | USB DWC3 host wake up support from system suspend | expand |
On Tue, May 24, 2022 at 03:43:48PM +0530, Krishna Kurapati wrote: > From: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > > If dwc3 is wakeup capable, keep the power domain always ON so that > wakeup from system suspend can be supported. Otherwise, keep the > power domain ON only during runtime suspend to support wakeup from > runtime suspend. > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> > --- > drivers/usb/dwc3/dwc3-qcom.c | 24 +++++++++++++++++------- > 1 file changed, 17 insertions(+), 7 deletions(-) > > diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c > index 5d5db62..7bffb31 100644 > --- a/drivers/usb/dwc3/dwc3-qcom.c > +++ b/drivers/usb/dwc3/dwc3-qcom.c > @@ -17,6 +17,7 @@ > #include <linux/of_platform.h> > #include <linux/platform_device.h> > #include <linux/phy/phy.h> > +#include <linux/pm_domain.h> > #include <linux/usb/of.h> > #include <linux/reset.h> > #include <linux/iopoll.h> > @@ -760,12 +761,13 @@ dwc3_qcom_create_urs_usb_platdev(struct device *dev) > > static int dwc3_qcom_probe(struct platform_device *pdev) > { > - struct device_node *np = pdev->dev.of_node; > - struct device *dev = &pdev->dev; > - struct dwc3_qcom *qcom; > - struct resource *res, *parent_res = NULL; > - int ret, i; > - bool ignore_pipe_clk; > + struct device_node *np = pdev->dev.of_node; > + struct device *dev = &pdev->dev; > + struct dwc3_qcom *qcom; > + struct resource *res, *parent_res = NULL; > + int ret, i; > + bool ignore_pipe_clk; > + struct generic_pm_domain *genpd; > > qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL); > if (!qcom) > @@ -774,6 +776,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev) > platform_set_drvdata(pdev, qcom); > qcom->dev = &pdev->dev; > > + genpd = pd_to_genpd(qcom->dev->pm_domain); > + > if (has_acpi_companion(dev)) { > qcom->acpi_pdata = acpi_device_get_match_data(dev); > if (!qcom->acpi_pdata) { > @@ -881,7 +885,13 @@ static int dwc3_qcom_probe(struct platform_device *pdev) > if (ret) > goto interconnect_exit; > > - device_init_wakeup(&pdev->dev, 1); > + if (device_can_wakeup(&qcom->dwc3->dev)) { > + genpd->flags |= GENPD_FLAG_ALWAYS_ON; > + device_init_wakeup(&pdev->dev, true); > + } else { > + genpd->flags |= GENPD_FLAG_RPM_ALWAYS_ON; > + } > + Can you please write a comment here explaining why we do this? commit description has some details already. Thanks, Pavan
On Tue, May 24, 2022 at 03:43:46PM +0530, Krishna Kurapati wrote: > From: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > > Adding helper functions to enable,disable wake irqs to make > the code simple and readable. > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > Reviewed-by: Matthias Kaehlcke <mka@chromium.org> > Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> > --- > drivers/usb/dwc3/dwc3-qcom.c | 58 ++++++++++++++++++++------------------------ > 1 file changed, 26 insertions(+), 32 deletions(-) > > diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c > index 6cba990..7352124 100644 > --- a/drivers/usb/dwc3/dwc3-qcom.c > +++ b/drivers/usb/dwc3/dwc3-qcom.c > @@ -296,50 +296,44 @@ static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom) > icc_put(qcom->icc_path_apps); > } > > +static void dwc3_qcom_enable_wakeup_irq(int irq) > +{ > + if (!irq) > + return; > + > + enable_irq(irq); > + enable_irq_wake(irq); > +} > + > +static void dwc3_qcom_disable_wakeup_irq(int irq) > +{ > + if (!irq) > + return; > + > + disable_irq_wake(irq); > + disable_irq_nosync(irq); > +} > + > static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom) > { > - if (qcom->hs_phy_irq) { > - disable_irq_wake(qcom->hs_phy_irq); > - disable_irq_nosync(qcom->hs_phy_irq); > - } > + dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq); > > - if (qcom->dp_hs_phy_irq) { > - disable_irq_wake(qcom->dp_hs_phy_irq); > - disable_irq_nosync(qcom->dp_hs_phy_irq); > - } > + dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq); > > - if (qcom->dm_hs_phy_irq) { > - disable_irq_wake(qcom->dm_hs_phy_irq); > - disable_irq_nosync(qcom->dm_hs_phy_irq); > - } > + dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq); > > - if (qcom->ss_phy_irq) { > - disable_irq_wake(qcom->ss_phy_irq); > - disable_irq_nosync(qcom->ss_phy_irq); > - } > + dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq); > } > > static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom) > { > - if (qcom->hs_phy_irq) { > - enable_irq(qcom->hs_phy_irq); > - enable_irq_wake(qcom->hs_phy_irq); > - } > + dwc3_qcom_enable_wakeup_irq(qcom->hs_phy_irq); > > - if (qcom->dp_hs_phy_irq) { > - enable_irq(qcom->dp_hs_phy_irq); > - enable_irq_wake(qcom->dp_hs_phy_irq); > - } > + dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq); > > - if (qcom->dm_hs_phy_irq) { > - enable_irq(qcom->dm_hs_phy_irq); > - enable_irq_wake(qcom->dm_hs_phy_irq); > - } > + dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq); > > - if (qcom->ss_phy_irq) { > - enable_irq(qcom->ss_phy_irq); > - enable_irq_wake(qcom->ss_phy_irq); > - } > + dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq); > } > > static int dwc3_qcom_suspend(struct dwc3_qcom *qcom) > -- > 2.7.4 > Looks good to me. Feel free to add Reviewed-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com> Thanks, Pavan
On Tue, May 24, 2022 at 03:43:44PM +0530, Krishna Kurapati wrote: > From: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > > Added support for wakeup-source property. This property can be > used to check and power down the phy during system suspend if > wake up is not supported. > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > Reviewed-by: Matthias Kaehlcke <mka@chromium.org> > Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> > --- > Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > index f4471f8..4d4de2f 100644 > --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > @@ -341,6 +341,11 @@ properties: > This port is used with the 'usb-role-switch' property to connect the > dwc3 to type C connector. > > + wakeup-source: > + $ref: /schemas/types.yaml#/definitions/flag > + description: > + Enable USB remote wakeup. > + > unevaluatedProperties: false > > required: > -- > 2.7.4 > Looks good to me. I see that Krzysztof already acked this patch. Thanks, Pavan