On Thu, 7 Apr 2022, Ricardo Martinez wrote:
> From: Haijun Liu <haijun.liu@xxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxx>
> Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@xxxxxxxxx>
> Co-developed-by: Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx>
> Signed-off-by: Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx>
> ---
> +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@xxxxxxxxxxxxxxx>
--
i.
