From c2cd3452d5f8b66d49a73138fba5baadd5b489bd Mon Sep 17 00:00:00 2001
From: Martin Kepplinger <martin.kepplinger@puri.sm>
Date: Thu, 19 Mar 2020 11:02:07 +0100
Subject: [PATCH] usb: dwc3: support continuous runtime PM with dual role
Git-commit: c2cd3452d5f8b66d49a73138fba5baadd5b489bd
References: git-fixes
Patch-mainline: v5.8-rc1
The DRD module calls dwc3_set_mode() on role switches, i.e. when a device is
being plugged in. In order to support continuous runtime power management when
plugging in / unplugging a cable, we need to call pm_runtime_get_sync() in
this path.
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/usb/dwc3/core.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index edc17155cb2b..7046c681fece 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -121,17 +121,19 @@ static void __dwc3_set_mode(struct work_struct *work)
if (dwc->dr_mode != USB_DR_MODE_OTG)
return;
+ pm_runtime_get_sync(dwc->dev);
+
if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG)
dwc3_otg_update(dwc, 0);
if (!dwc->desired_dr_role)
- return;
+ goto out;
if (dwc->desired_dr_role == dwc->current_dr_role)
- return;
+ goto out;
if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev)
- return;
+ goto out;
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_HOST:
@@ -190,6 +192,9 @@ static void __dwc3_set_mode(struct work_struct *work)
break;
}
+out:
+ pm_runtime_mark_last_busy(dwc->dev);
+ pm_runtime_put_autosuspend(dwc->dev);
}
void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
--
2.26.2