Commit 93bef230 authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

[media] smiapp: Implement support for autosuspend 



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: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent cbba45d4

drivers/media/i2c/smiapp/smiapp-core.c

+19 −10
Original line number Diff line number Diff line
@@ -1380,16 +1380,21 @@ 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) {

		pm_runtime_mark_last_busy(subdev->dev);

		pm_runtime_put_autosuspend(subdev->dev);



		return 0;

	}



	if (on) {

	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);
@@ -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;