[PATCH v8 6/6] usb: dwc3: qcom: Keep power domain on to support wakeup
From: Sandeep Maheswaram <hidden>
Date: 2021-06-28 12:09:21
Also in:
linux-arm-msm, lkml
Subsystem:
arm/qualcomm mailing list, designware usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Thinh Nguyen, Linus Torvalds, Greg Kroah-Hartman
If wakeup capable devices are connected to the controller (directly or through hubs) at suspend time keep the power domain on in order to support wakeup from these devices. Signed-off-by: Sandeep Maheswaram <redacted> --- Checking phy_power_off flag instead of usb_wakeup_enabled_descendants to keep gdsc active. drivers/usb/dwc3/dwc3-qcom.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 82125bc..ba31aa3 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>
@@ -355,9 +356,15 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom) u32 val; int i, ret; + struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3); + struct generic_pm_domain *genpd = pd_to_genpd(qcom->dev->pm_domain); + if (qcom->is_suspended) return 0; + if (!dwc->phy_power_off && dwc->xhci) + genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP; + val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG); if (!(val & PWR_EVNT_LPM_IN_L2_MASK)) dev_err(qcom->dev, "HS-PHY not in L2\n");
@@ -382,9 +389,15 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom) int ret; int i; + struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3); + struct generic_pm_domain *genpd = pd_to_genpd(qcom->dev->pm_domain); + if (!qcom->is_suspended) return 0; + if (dwc->xhci) + genpd->flags &= ~GENPD_FLAG_ACTIVE_WAKEUP; + if (device_may_wakeup(qcom->dev)) dwc3_qcom_disable_interrupts(qcom);
--
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