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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: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220419193314.526966-5-daniele.ceraolospurio@intel.com
This commit is contained in:
Tomas Winkler 2022-04-19 12:33:11 -07:00 committed by Daniele Ceraolo Spurio
parent ce97126d6c
commit ad10a35461
1 changed files with 66 additions and 1 deletions
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67
drivers/misc/mei/gsc-me.c
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@ -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[] = {
{