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>
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@ -121,17 +121,19 @@ static void __dwc3_set_mode(struct work_struct *work)
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if (dwc->dr_mode != USB_DR_MODE_OTG)
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return;
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pm_runtime_get_sync(dwc->dev);
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if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG)
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dwc3_otg_update(dwc, 0);
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if (!dwc->desired_dr_role)
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return;
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goto out;
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if (dwc->desired_dr_role == dwc->current_dr_role)
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return;
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goto out;
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if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev)
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return;
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goto out;
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switch (dwc->current_dr_role) {
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case DWC3_GCTL_PRTCAP_HOST:
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@ -190,6 +192,9 @@ static void __dwc3_set_mode(struct work_struct *work)
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break;
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}
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out:
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pm_runtime_mark_last_busy(dwc->dev);
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pm_runtime_put_autosuspend(dwc->dev);
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}
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void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
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