[PATCH v3 1/3] usb: dwc3: drd: extend dwc3_pre_set_role() to extcon and otg usecase

[Xu Yang <xu.yang_2@nxp.com>]

Call dwc3_pre_set_role() to support both extcon and otg usecase, so that
the glue driver can do proper action in case of role changes.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>

---
Changes in v3:
 - no changes
Changes in v2:
 - improve commit message
 - add Rb and Ab tag
---
 drivers/usb/dwc3/drd.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 589bbeb27454..031cfd12300a 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -381,6 +381,7 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 		dwc3_otgregs_init(dwc);
 		dwc3_otg_host_init(dwc);
 		spin_unlock_irqrestore(&dwc->lock, flags);
+		dwc3_pre_set_role(dwc, USB_ROLE_HOST);
 		ret = dwc3_host_init(dwc);
 		if (ret) {
 			dev_err(dwc->dev, "failed to initialize host\n");
@@ -406,6 +407,7 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 			otg_set_vbus(dwc->usb2_phy->otg, false);
 		if (dwc->usb2_generic_phy[0])
 			phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
+		dwc3_pre_set_role(dwc, USB_ROLE_DEVICE);
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
 			dev_err(dwc->dev, "failed to initialize peripheral\n");
@@ -433,10 +435,12 @@ static int dwc3_drd_notifier(struct notifier_block *nb,
 			     unsigned long event, void *ptr)
 {
 	struct dwc3 *dwc = container_of(nb, struct dwc3, edev_nb);
+	u32 mode = event ? DWC3_GCTL_PRTCAP_HOST : DWC3_GCTL_PRTCAP_DEVICE;
+	enum usb_role role = mode == DWC3_GCTL_PRTCAP_HOST ?
+				     USB_ROLE_HOST : USB_ROLE_DEVICE;
 
-	dwc3_set_mode(dwc, event ?
-		      DWC3_GCTL_PRTCAP_HOST :
-		      DWC3_GCTL_PRTCAP_DEVICE);
+	dwc3_pre_set_role(dwc, role);
+	dwc3_set_mode(dwc, mode);
 
 	return NOTIFY_DONE;
 }
-- 
2.34.1