diff options
| -rw-r--r-- | drivers/media/media-device.c | 7 | ||||
| -rw-r--r-- | include/media/media-device.h | 22 |
2 files changed, 22 insertions, 7 deletions
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c index c12481c753a0..ca16bd3091bd 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -689,10 +689,6 @@ static void media_device_release_devres(struct device *dev, void *res) { } -/* - * media_device_get_devres() - get media device as device resource - * creates if one doesn't exist -*/ struct media_device *media_device_get_devres(struct device *dev) { struct media_device *mdev; @@ -709,9 +705,6 @@ struct media_device *media_device_get_devres(struct device *dev) } EXPORT_SYMBOL_GPL(media_device_get_devres); -/* - * media_device_find_devres() - find media device as device resource -*/ struct media_device *media_device_find_devres(struct device *dev) { return devres_find(dev, media_device_release_devres, NULL, NULL); diff --git a/include/media/media-device.h b/include/media/media-device.h index 215a0d88241d..ebc2f3a239eb 100644 --- a/include/media/media-device.h +++ b/include/media/media-device.h @@ -449,7 +449,29 @@ int __must_check media_device_register_entity(struct media_device *mdev, * the driver if required. */ void media_device_unregister_entity(struct media_entity *entity); + +/** + * media_device_get_devres() - get media device as device resource + * creates if one doesn't exist + * + * @dev: pointer to struct &device. + * + * Sometimes, the media controller &media_device needs to be shared by more + * than one driver. This function adds support for that, by dynamically + * allocating the &media_device and allowing it to be obtained from the + * struct &device associated with the common device where all sub-device + * components belong. So, for example, on an USB device with multiple + * interfaces, each interface may be handled by a separate per-interface + * drivers. While each interface have its own &device, they all share a + * common &device associated with the hole USB device. + */ struct media_device *media_device_get_devres(struct device *dev); + +/** + * media_device_find_devres() - find media device as device resource + * + * @dev: pointer to struct &device. + */ struct media_device *media_device_find_devres(struct device *dev); /* Iterate over all entities. */ |