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[media] smiapp: Implement support for autosuspend

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Delay suspending the device by 1000 ms by default. This is done on
explicit power off through s_power() callback, through releasing the
file descriptor, NVM read or when the probe finishes.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sakari Ailus 2016-09-14 12:29:23 -03:00 committed by Mauro Carvalho Chehab
parent cbba45d436
commit 93bef23024
1 changed files with 19 additions and 10 deletions
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29
drivers/media/i2c/smiapp/smiapp-core.c
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@ -1380,17 +1380,22 @@ static int smiapp_power_off(struct device *dev)
static int smiapp_set_power(struct v4l2_subdev *subdev, int on)
{
int rval = 0;
int rval;
if (on) {
rval = pm_runtime_get_sync(subdev->dev);
if (rval >= 0)
return 0;
if (!on) {
pm_runtime_mark_last_busy(subdev->dev);
pm_runtime_put_autosuspend(subdev->dev);
if (rval != -EBUSY && rval != -EAGAIN)
pm_runtime_set_active(subdev->dev);
return 0;
}
rval = pm_runtime_get_sync(subdev->dev);
if (rval >= 0)
return 0;
if (rval != -EBUSY && rval != -EAGAIN)
pm_runtime_set_active(subdev->dev);
pm_runtime_put(subdev->dev);
return rval;
@ -2340,7 +2345,8 @@ smiapp_sysfs_nvm_read(struct device *dev, struct device_attribute *attr,
return -ENODEV;
}
pm_runtime_put(&client->dev);
pm_runtime_mark_last_busy(&client->dev);
pm_runtime_put_autosuspend(&client->dev);
}
/*
* NVM is still way below a PAGE_SIZE, so we can safely
@ -2681,7 +2687,8 @@ static int smiapp_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
static int smiapp_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
pm_runtime_put(sd->dev);
pm_runtime_mark_last_busy(sd->dev);
pm_runtime_put_autosuspend(sd->dev);
return 0;
}
@ -3093,7 +3100,9 @@ static int smiapp_probe(struct i2c_client *client,
if (rval < 0)
goto out_media_entity_cleanup;
pm_runtime_put(&client->dev);
pm_runtime_set_autosuspend_delay(&client->dev, 1000);
pm_runtime_use_autosuspend(&client->dev);
pm_runtime_put_autosuspend(&client->dev);
return 0;