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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364/* SPDX-License-Identifier: GPL-2.0+ *//* * media-dev-allocator.h - Media Controller Device Allocator API * * Copyright (c) 2019 Shuah Khan <shuah@kernel.org> * * Credits: Suggested by Laurent Pinchart <laurent.pinchart@ideasonboard.com> */
/* * This file adds a global ref-counted Media Controller Device Instance API. * A system wide global media device list is managed and each media device * includes a kref count. The last put on the media device releases the media * device instance. */
#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);#elsestatic 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 */