From: Martin Kepplinger <martin.kepplinger@puri.sm>
To: balbi@kernel.org, robh@kernel.org
Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Martin Kepplinger <martin.kepplinger@puri.sm>
Subject: [PATCH 1/2] usb: dwc3: support continuous runtime PM with dual role
Date: Wed, 18 Mar 2020 09:35:07 +0100 [thread overview]
Message-ID: <20200318083508.20781-1-martin.kepplinger@puri.sm> (raw)
The DRD module calls dwc3_set_mode() on role switches, i.e. when a device is
being pugged in. In order to support continuous runtime power management when
plugging in / unplugging a cable, we need to call pm_runtime_get() in this path.
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
---
drivers/usb/dwc3/core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index edc17155cb2b..7743c4de82e9 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -196,11 +196,16 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
{
unsigned long flags;
+ pm_runtime_get(dwc->dev);
+
spin_lock_irqsave(&dwc->lock, flags);
dwc->desired_dr_role = mode;
spin_unlock_irqrestore(&dwc->lock, flags);
queue_work(system_freezable_wq, &dwc->drd_work);
+
+ pm_runtime_mark_last_busy(dwc->dev);
+ pm_runtime_put_autosuspend(dwc->dev);
}
u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)
--
2.20.1
next reply other threads:[~2020-03-18 8:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-18 8:35 Martin Kepplinger [this message]
2020-03-18 8:35 ` [PATCH 2/2] dt-bindings: usb: dwc3: add optional extcon description Martin Kepplinger
2020-03-30 23:04 ` Rob Herring
2020-03-18 11:13 ` [PATCH 1/2] usb: dwc3: support continuous runtime PM with dual role Roger Quadros
2020-03-18 11:16 ` Martin Kepplinger
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