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authorMartin Kepplinger2020-03-19 11:02:07 +0100
committerFelipe Balbi2020-05-05 10:58:50 +0300
commitc2cd3452d5f8b66d49a73138fba5baadd5b489bd (patch)
tree4b95f0256bee66ab293d0a1dbcc51b2f50b7a393 /drivers
parente2e77a94078bd4d459ac8267e7b24eece1e621db (diff)
usb: dwc3: support continuous runtime PM with dual role
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/dwc3/core.c11
1 files 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)