> > > What your otg port looks like? It is a Micro-B-Female port?
> > > If ID pin is low, it will be considered as host role, when you
> > > connect to another machine's host port, both sides are host, it can't
> > > be enumerated.
> >
> > Yes, I know, both sides are in the host role. Granted my fault, but
> > never the less, we get an IRQ storm and the IRQ gets disabled. You have
> > to reboot to get the system working again.
> >
>
Hi Marc, I think this problem can be fixed with below patch, I verified
it at imx6 platform.
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index e26e616..c3fcd64 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -644,6 +644,11 @@ static int ci_hdrc_probe(struct platform_device *pdev)
: CI_ROLE_GADGET;
}
+ if (ci->role == CI_ROLE_GADGET)
+ /* only update vbus status for peripheral */
+ ci_handle_vbus_change(ci);
+
+
ret = ci_role_start(ci, ci->role);
if (ret) {
dev_err(dev, "can't start %s role\n", ci_role(ci)->name);
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index b34c819..69d20fb 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1795,9 +1795,6 @@ static int udc_start(struct ci_hdrc *ci)
pm_runtime_no_callbacks(&ci->gadget.dev);
pm_runtime_enable(&ci->gadget.dev);
- /* Update ci->vbus_active */
- ci_handle_vbus_change(ci);
-
return retval;
destroy_eps:
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