From: Peter Chen peter.chen@nxp.com
commit 876d4e1e8298ad1f94d9e9392fc90486755437b4 upstream.
If wakeup event occurred by extcon event, it needs to call ci_irq again since the first ci_irq calling at extcon notifier only wakes up controller, but do noop for event handling, it causes the extcon use case can't work well from low power mode.
Cc: stable@vger.kernel.org Fixes: 3ecb3e09b042 ("usb: chipidea: Use extcon framework for VBUS and ID detect") Reported-by: Philippe Schenker philippe.schenker@toradex.com Tested-by: Philippe Schenker philippe.schenker@toradex.com Signed-off-by: Peter Chen peter.chen@nxp.com Link: https://lore.kernel.org/r/20200707060601.31907-2-peter.chen@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/chipidea/core.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
--- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -1265,6 +1265,29 @@ static void ci_controller_suspend(struct enable_irq(ci->irq); }
+/* + * Handle the wakeup interrupt triggered by extcon connector + * We need to call ci_irq again for extcon since the first + * interrupt (wakeup int) only let the controller be out of + * low power mode, but not handle any interrupts. + */ +static void ci_extcon_wakeup_int(struct ci_hdrc *ci) +{ + struct ci_hdrc_cable *cable_id, *cable_vbus; + u32 otgsc = hw_read_otgsc(ci, ~0); + + cable_id = &ci->platdata->id_extcon; + cable_vbus = &ci->platdata->vbus_extcon; + + if (!IS_ERR(cable_id->edev) && ci->is_otg && + (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) + ci_irq(ci->irq, ci); + + if (!IS_ERR(cable_vbus->edev) && ci->is_otg && + (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) + ci_irq(ci->irq, ci); +} + static int ci_controller_resume(struct device *dev) { struct ci_hdrc *ci = dev_get_drvdata(dev); @@ -1297,6 +1320,7 @@ static int ci_controller_resume(struct d enable_irq(ci->irq); if (ci_otg_is_fsm_mode(ci)) ci_otg_fsm_wakeup_by_srp(ci); + ci_extcon_wakeup_int(ci); }
return 0;