usb: dwc3: support continuous runtime PM with dual role (c2cd3452) · Commits · 戴 / test

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>

drivers/usb/dwc3/core.c

+8 −3

Original line number	Diff line number	Diff line
		@@ -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)

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