mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-21 00:42:16 +00:00
97548ed4c4
Create the following ioctl and implement it at the media device level to setup links. - MEDIA_IOC_SETUP_LINK: Modify the properties of a given link The only property that can currently be modified is the ENABLED link flag to enable/disable a link. Links marked with the IMMUTABLE link flag can not be enabled or disabled. Enabling or disabling a link has effects on entities' use count. Those changes are automatically propagated through the graph. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com> Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi> Acked-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
|
|
* Media device
|
|
*
|
|
* Copyright (C) 2010 Nokia Corporation
|
|
*
|
|
* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
* Sakari Ailus <sakari.ailus@iki.fi>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _MEDIA_DEVICE_H
|
|
#define _MEDIA_DEVICE_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <media/media-devnode.h>
|
|
#include <media/media-entity.h>
|
|
|
|
/**
|
|
* struct media_device - Media device
|
|
* @dev: Parent device
|
|
* @devnode: Media device node
|
|
* @model: Device model name
|
|
* @serial: Device serial number (optional)
|
|
* @bus_info: Unique and stable device location identifier
|
|
* @hw_revision: Hardware device revision
|
|
* @driver_version: Device driver version
|
|
* @entity_id: ID of the next entity to be registered
|
|
* @entities: List of registered entities
|
|
* @lock: Entities list lock
|
|
* @graph_mutex: Entities graph operation lock
|
|
*
|
|
* This structure represents an abstract high-level media device. It allows easy
|
|
* access to entities and provides basic media device-level support. The
|
|
* structure can be allocated directly or embedded in a larger structure.
|
|
*
|
|
* The parent @dev is a physical device. It must be set before registering the
|
|
* media device.
|
|
*
|
|
* @model is a descriptive model name exported through sysfs. It doesn't have to
|
|
* be unique.
|
|
*/
|
|
struct media_device {
|
|
/* dev->driver_data points to this struct. */
|
|
struct device *dev;
|
|
struct media_devnode devnode;
|
|
|
|
char model[32];
|
|
char serial[40];
|
|
char bus_info[32];
|
|
u32 hw_revision;
|
|
u32 driver_version;
|
|
|
|
u32 entity_id;
|
|
struct list_head entities;
|
|
|
|
/* Protects the entities list */
|
|
spinlock_t lock;
|
|
/* Serializes graph operations. */
|
|
struct mutex graph_mutex;
|
|
|
|
int (*link_notify)(struct media_pad *source,
|
|
struct media_pad *sink, u32 flags);
|
|
};
|
|
|
|
/* media_devnode to media_device */
|
|
#define to_media_device(node) container_of(node, struct media_device, devnode)
|
|
|
|
int __must_check media_device_register(struct media_device *mdev);
|
|
void media_device_unregister(struct media_device *mdev);
|
|
|
|
int __must_check media_device_register_entity(struct media_device *mdev,
|
|
struct media_entity *entity);
|
|
void media_device_unregister_entity(struct media_entity *entity);
|
|
|
|
/* Iterate over all entities. */
|
|
#define media_device_for_each_entity(entity, mdev) \
|
|
list_for_each_entry(entity, &(mdev)->entities, list)
|
|
|
|
#endif
|