Commit ad10a354 authored by Tomas Winkler's avatar Tomas Winkler Committed by Daniele Ceraolo Spurio
Browse files

mei: gsc: add runtime pm handlers 



Implement runtime handlers for mei-gsc, to track
idle state of the device properly.

CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220419193314.526966-5-daniele.ceraolospurio@intel.com
parent ce97126d

drivers/misc/mei/gsc-me.c

+66 −1
Original line number Diff line number Diff line
@@ -159,7 +159,72 @@ static int __maybe_unused mei_gsc_pm_resume(struct device *device) 
	return 0;

}



static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);

static int __maybe_unused mei_gsc_pm_runtime_idle(struct device *device)

{

	struct mei_device *dev = dev_get_drvdata(device);



	if (!dev)

		return -ENODEV;

	if (mei_write_is_idle(dev))

		pm_runtime_autosuspend(device);



	return -EBUSY;

}



static int  __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)

{

	struct mei_device *dev = dev_get_drvdata(device);

	struct mei_me_hw *hw;

	int ret;



	if (!dev)

		return -ENODEV;



	mutex_lock(&dev->device_lock);



	if (mei_write_is_idle(dev)) {

		hw = to_me_hw(dev);

		hw->pg_state = MEI_PG_ON;

		ret = 0;

	} else {

		ret = -EAGAIN;

	}



	mutex_unlock(&dev->device_lock);



	return ret;

}



static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)

{

	struct mei_device *dev = dev_get_drvdata(device);

	struct mei_me_hw *hw;

	irqreturn_t irq_ret;



	if (!dev)

		return -ENODEV;



	mutex_lock(&dev->device_lock);



	hw = to_me_hw(dev);

	hw->pg_state = MEI_PG_OFF;



	mutex_unlock(&dev->device_lock);



	irq_ret = mei_me_irq_thread_handler(1, dev);

	if (irq_ret != IRQ_HANDLED)

		dev_err(dev->dev, "thread handler fail %d\n", irq_ret);



	return 0;

}



static const struct dev_pm_ops mei_gsc_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(mei_gsc_pm_suspend,

				mei_gsc_pm_resume)

	SET_RUNTIME_PM_OPS(mei_gsc_pm_runtime_suspend,

			   mei_gsc_pm_runtime_resume,

			   mei_gsc_pm_runtime_idle)

};



static const struct auxiliary_device_id mei_gsc_id_table[] = {

	{