Now that the media device can be allocated dynamically, drivers have no
longer a way to conveniently obtain the driver private data structure.
Provide one again in the form of a private pointer passed to the
media_device_alloc() function.
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Acked-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/media-device.c | 3 ++-
include/media/media-device.h | 15 ++++++++++++++-
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 648c64c..7d9f76d 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -729,7 +729,7 @@ static void media_device_release(struct media_devnode
*devnode)
kfree(mdev);
}
-struct media_device *media_device_alloc(struct device *dev)
+struct media_device *media_device_alloc(struct device *dev, void *priv)
{
struct media_device *mdev;
@@ -745,6 +745,7 @@ struct media_device *media_device_alloc(struct device *dev)
mdev->dev = dev;
media_device_init(mdev);
+ mdev->priv = priv;
mdev->devnode.release = media_device_release;
diff --git a/include/media/media-device.h b/include/media/media-device.h
index ae2bc08..94e96ef 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -62,6 +62,7 @@ struct media_device_ops {
* struct media_device - Media device
* @dev: Parent device
* @devnode: Media device node
+ * @priv: A pointer to driver private data
* @driver_name: Optional device driver name. If not set, calls to
* %MEDIA_IOC_DEVICE_INFO will return ``dev->driver->name``.
* This is needed for USB drivers for example, as otherwise
@@ -128,6 +129,7 @@ struct media_device {
/* dev->driver_data points to this struct. */
struct device *dev;
struct media_devnode devnode;
+ void *priv;
char model[32];
char driver_name[32];
@@ -214,6 +216,7 @@ void media_device_init(struct media_device *mdev);
* media_device_alloc() - Allocate and initialise a media device
*
* @dev: The associated struct device pointer
+ * @priv: pointer to a driver private data structure
*
* Allocate and initialise a media device. Returns a media device.
* The media device is refcounted, and this function returns a media
@@ -222,7 +225,7 @@ void media_device_init(struct media_device *mdev);
* References are taken and given using media_device_get() and
* media_device_put().
*/
-struct media_device *media_device_alloc(struct device *dev);
+struct media_device *media_device_alloc(struct device *dev, void *priv);
/**
* media_device_get() - Get a reference to a media device
@@ -249,6 +252,16 @@ struct media_device *media_device_alloc(struct device
*dev);
} while (0)
/**
+ * media_device_priv() - Obtain the driver private pointer
+ *
+ * Returns a pointer passed to the media_device_alloc() function.
+ */
+static inline void *media_device_priv(struct media_device *mdev)
+{
+ return mdev->priv;
+}
+
+/**
* media_device_cleanup() - Cleanups a media device element
*
* @mdev: pointer to struct &media_device
--
2.1.4
--
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