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Date: Thu, 21 Apr 2022 14:47:06 +0300 (EEST) From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com> To: Ricardo Martinez <ricardo.martinez@...ux.intel.com> cc: Netdev <netdev@...r.kernel.org>, linux-wireless@...r.kernel.org, kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net, ryazanov.s.a@...il.com, loic.poulain@...aro.org, m.chetan.kumar@...el.com, chandrashekar.devegowda@...el.com, linuxwwan@...el.com, chiranjeevi.rapolu@...ux.intel.com, haijun.liu@...iatek.com, amir.hanania@...el.com, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, dinesh.sharma@...el.com, eliot.lee@...el.com, moises.veleta@...el.com, pierre-louis.bossart@...el.com, muralidharan.sethuraman@...el.com, Soumya.Prakash.Mishra@...el.com, sreehari.kancharla@...el.com, madhusmita.sahu@...el.com Subject: Re: [PATCH net-next v6 12/13] net: wwan: t7xx: Device deep sleep lock/unlock On Thu, 7 Apr 2022, Ricardo Martinez wrote: > From: Haijun Liu <haijun.liu@...iatek.com> > > Introduce the mechanism to lock/unlock the device 'deep sleep' mode. > When the PCIe link state is L1.2 or L2, the host side still can keep > the device is in D0 state from the host side point of view. At the same > time, if the device's 'deep sleep' mode is unlocked, the device will > go to 'deep sleep' while it is still in D0 state on the host side. > > Signed-off-by: Haijun Liu <haijun.liu@...iatek.com> > Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@...el.com> > Co-developed-by: Ricardo Martinez <ricardo.martinez@...ux.intel.com> > Signed-off-by: Ricardo Martinez <ricardo.martinez@...ux.intel.com> > --- > +void t7xx_pci_enable_sleep(struct t7xx_pci_dev *t7xx_dev) > +{ > + unsigned long flags; > + > + spin_lock_irqsave(&t7xx_dev->md_pm_lock, flags); > + t7xx_dev->sleep_disable_count--; > + if (atomic_read(&t7xx_dev->md_pm_state) < MTK_PM_RESUMED) { goto unlock; > + spin_unlock_irqrestore(&t7xx_dev->md_pm_lock, flags); > + return; > + } > + > + if (t7xx_dev->sleep_disable_count == 0) > + t7xx_dev_set_sleep_capability(t7xx_dev, true); unlock: > + spin_unlock_irqrestore(&t7xx_dev->md_pm_lock, flags); > +} > + > static int t7xx_send_pm_request(struct t7xx_pci_dev *t7xx_dev, u32 request) > { > unsigned long wait_ret; Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com> -- i.
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