From: Martin Kepplinger Date: Thu, 19 Mar 2020 10:02:07 +0000 (+0100) Subject: usb: dwc3: support continuous runtime PM with dual role X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.0~1997^2~16^2~94 X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=c2cd3452d5f8b66d49a73138fba5baadd5b489bd;p=linux.git 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 Signed-off-by: Felipe Balbi --- 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)