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Subject[PATCH v6 5/5] usb: dwc3: qcom: Set genpd active wakeup flag for usb gdsc
Date
Set genpd active wakeup flag for usb gdsc if wakeup capable devices
are connected so that wake up happens without reenumeration.

Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
---
drivers/usb/dwc3/dwc3-qcom.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index b1e9061..b61dc0b 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -17,9 +17,11 @@
#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>
+#include <linux/usb/hcd.h>

#include "core.h"

@@ -354,10 +356,19 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
{
u32 val;
int i, ret;
+ struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
+ struct usb_hcd *hcd;
+ struct generic_pm_domain *genpd = pd_to_genpd(qcom->dev->pm_domain);

if (qcom->is_suspended)
return 0;

+ if (dwc->xhci) {
+ hcd = platform_get_drvdata(dwc->xhci);
+ if (usb_wakeup_enabled_descendants(hcd->self.root_hub))
+ 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 +393,15 @@ 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);

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
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