include/media/media-dev-allocator.h

Source file repositories/reference/linux-study-clean/include/media/media-dev-allocator.h

File Facts

System
Linux kernel
Corpus path
include/media/media-dev-allocator.h
Extension
.h
Size
2261 bytes
Lines
64
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _MEDIA_DEV_ALLOCATOR_H
#define _MEDIA_DEV_ALLOCATOR_H

struct usb_device;

#if defined(CONFIG_MEDIA_CONTROLLER) && IS_ENABLED(CONFIG_USB)
/**
 * media_device_usb_allocate() - Allocate and return struct &media device
 *
 * @udev:		struct &usb_device pointer
 * @module_name:	should be filled with %KBUILD_MODNAME
 * @owner:		struct module pointer %THIS_MODULE for the driver.
 *			%THIS_MODULE is null for a built-in driver.
 *			It is safe even when %THIS_MODULE is null.
 *
 * This interface should be called to allocate a Media Device when multiple
 * drivers share usb_device and the media device. This interface allocates
 * &media_device structure and calls media_device_usb_init() to initialize
 * it.
 *
 */
struct media_device *media_device_usb_allocate(struct usb_device *udev,
					       const char *module_name,
					       struct module *owner);
/**
 * media_device_delete() - Release media device. Calls kref_put().
 *
 * @mdev:		struct &media_device pointer
 * @module_name:	should be filled with %KBUILD_MODNAME
 * @owner:		struct module pointer %THIS_MODULE for the driver.
 *			%THIS_MODULE is null for a built-in driver.
 *			It is safe even when %THIS_MODULE is null.
 *
 * This interface should be called to put Media Device Instance kref.
 */
void media_device_delete(struct media_device *mdev, const char *module_name,
			 struct module *owner);
#else
static inline struct media_device *media_device_usb_allocate(
			struct usb_device *udev, const char *module_name,
			struct module *owner)
			{ return NULL; }
static inline void media_device_delete(
			struct media_device *mdev, const char *module_name,
			struct module *owner) { }
#endif /* CONFIG_MEDIA_CONTROLLER && CONFIG_USB */
#endif /* _MEDIA_DEV_ALLOCATOR_H */

Annotation

Implementation Notes