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| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2024-03-08 02:40:25 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-26 14:58:05 +0100 |
| commit | f9aa41130ac69d13a53ce2a153ca79c70d43f39c (patch) | |
| tree | d47d9479952402aef7500430fb1ae1d9ba052dc9 /drivers/usb/dwc3/gadget.c | |
| parent | fdada0db0b2ae2addef4ccafe50937874dbeeebe (diff) | |
| download | linux-stable-f9aa41130ac69d13a53ce2a153ca79c70d43f39c.tar.gz linux-stable-f9aa41130ac69d13a53ce2a153ca79c70d43f39c.tar.bz2 linux-stable-f9aa41130ac69d13a53ce2a153ca79c70d43f39c.zip | |
usb: dwc3: Properly set system wakeup
If the device is configured for system wakeup, then make sure that the
xHCI driver knows about it and make sure to permit wakeup only at the
appropriate time.
For host mode, if the controller goes through the dwc3 code path, then a
child xHCI platform device is created. Make sure the platform device
also inherits the wakeup setting for xHCI to enable remote wakeup.
For device mode, make sure to disable system wakeup if no gadget driver
is bound. We may experience unwanted system wakeup due to the wakeup
signal from the controller PMU detecting connection/disconnection when
in low power (D3). E.g. In the case of Steam Deck, the PCI PME prevents
the system staying in suspend.
Cc: stable@vger.kernel.org
Reported-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Closes: https://lore.kernel.org/linux-usb/70a7692d-647c-9be7-00a6-06fc60f77294@igalia.com/T/#mf00d6669c2eff7b308d1162acd1d66c09f0853c7
Fixes: d07e8819a03d ("usb: dwc3: add xHCI Host support")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Tested-by: Sanath S <Sanath.S@amd.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck
Link: https://lore.kernel.org/r/667cfda7009b502e08462c8fb3f65841d103cc0a.1709865476.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 40c52dbc28d3..4df2661f6675 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2955,6 +2955,9 @@ static int dwc3_gadget_start(struct usb_gadget *g, dwc->gadget_driver = driver; spin_unlock_irqrestore(&dwc->lock, flags); + if (dwc->sys_wakeup) + device_wakeup_enable(dwc->sysdev); + return 0; } @@ -2970,6 +2973,9 @@ static int dwc3_gadget_stop(struct usb_gadget *g) struct dwc3 *dwc = gadget_to_dwc(g); unsigned long flags; + if (dwc->sys_wakeup) + device_wakeup_disable(dwc->sysdev); + spin_lock_irqsave(&dwc->lock, flags); dwc->gadget_driver = NULL; dwc->max_cfg_eps = 0; @@ -4651,6 +4657,10 @@ int dwc3_gadget_init(struct dwc3 *dwc) else dwc3_gadget_set_speed(dwc->gadget, dwc->maximum_speed); + /* No system wakeup if no gadget driver bound */ + if (dwc->sys_wakeup) + device_wakeup_disable(dwc->sysdev); + return 0; err5: |