From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/include/media/media-entity.h | 159 ++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 kernel/include/media/media-entity.h (limited to 'kernel/include/media/media-entity.h') diff --git a/kernel/include/media/media-entity.h b/kernel/include/media/media-entity.h new file mode 100644 index 000000000..0c003d817 --- /dev/null +++ b/kernel/include/media/media-entity.h @@ -0,0 +1,159 @@ +/* + * Media entity + * + * Copyright (C) 2010 Nokia Corporation + * + * Contacts: Laurent Pinchart + * Sakari Ailus + * + * 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_ENTITY_H +#define _MEDIA_ENTITY_H + +#include +#include +#include +#include + +struct media_pipeline { +}; + +struct media_link { + struct media_pad *source; /* Source pad */ + struct media_pad *sink; /* Sink pad */ + struct media_link *reverse; /* Link in the reverse direction */ + unsigned long flags; /* Link flags (MEDIA_LNK_FL_*) */ +}; + +struct media_pad { + struct media_entity *entity; /* Entity this pad belongs to */ + u16 index; /* Pad index in the entity pads array */ + unsigned long flags; /* Pad flags (MEDIA_PAD_FL_*) */ +}; + +/** + * struct media_entity_operations - Media entity operations + * @link_setup: Notify the entity of link changes. The operation can + * return an error, in which case link setup will be + * cancelled. Optional. + * @link_validate: Return whether a link is valid from the entity point of + * view. The media_entity_pipeline_start() function + * validates all links by calling this operation. Optional. + */ +struct media_entity_operations { + int (*link_setup)(struct media_entity *entity, + const struct media_pad *local, + const struct media_pad *remote, u32 flags); + int (*link_validate)(struct media_link *link); +}; + +struct media_entity { + struct list_head list; + struct media_device *parent; /* Media device this entity belongs to*/ + u32 id; /* Entity ID, unique in the parent media + * device context */ + const char *name; /* Entity name */ + u32 type; /* Entity type (MEDIA_ENT_T_*) */ + u32 revision; /* Entity revision, driver specific */ + unsigned long flags; /* Entity flags (MEDIA_ENT_FL_*) */ + u32 group_id; /* Entity group ID */ + + u16 num_pads; /* Number of sink and source pads */ + u16 num_links; /* Number of existing links, both + * enabled and disabled */ + u16 num_backlinks; /* Number of backlinks */ + u16 max_links; /* Maximum number of links */ + + struct media_pad *pads; /* Pads array (num_pads elements) */ + struct media_link *links; /* Links array (max_links elements)*/ + + const struct media_entity_operations *ops; /* Entity operations */ + + /* Reference counts must never be negative, but are signed integers on + * purpose: a simple WARN_ON(<0) check can be used to detect reference + * count bugs that would make them negative. + */ + int stream_count; /* Stream count for the entity. */ + int use_count; /* Use count for the entity. */ + + struct media_pipeline *pipe; /* Pipeline this entity belongs to. */ + + union { + /* Node specifications */ + struct { + u32 major; + u32 minor; + } dev; + + /* Sub-device specifications */ + /* Nothing needed yet */ + } info; +}; + +static inline u32 media_entity_type(struct media_entity *entity) +{ + return entity->type & MEDIA_ENT_TYPE_MASK; +} + +static inline u32 media_entity_subtype(struct media_entity *entity) +{ + return entity->type & MEDIA_ENT_SUBTYPE_MASK; +} + +#define MEDIA_ENTITY_ENUM_MAX_DEPTH 16 +#define MEDIA_ENTITY_ENUM_MAX_ID 64 + +struct media_entity_graph { + struct { + struct media_entity *entity; + int link; + } stack[MEDIA_ENTITY_ENUM_MAX_DEPTH]; + + DECLARE_BITMAP(entities, MEDIA_ENTITY_ENUM_MAX_ID); + int top; +}; + +int media_entity_init(struct media_entity *entity, u16 num_pads, + struct media_pad *pads, u16 extra_links); +void media_entity_cleanup(struct media_entity *entity); + +int media_entity_create_link(struct media_entity *source, u16 source_pad, + struct media_entity *sink, u16 sink_pad, u32 flags); +void __media_entity_remove_links(struct media_entity *entity); +void media_entity_remove_links(struct media_entity *entity); + +int __media_entity_setup_link(struct media_link *link, u32 flags); +int media_entity_setup_link(struct media_link *link, u32 flags); +struct media_link *media_entity_find_link(struct media_pad *source, + struct media_pad *sink); +struct media_pad *media_entity_remote_pad(struct media_pad *pad); + +struct media_entity *media_entity_get(struct media_entity *entity); +void media_entity_put(struct media_entity *entity); + +void media_entity_graph_walk_start(struct media_entity_graph *graph, + struct media_entity *entity); +struct media_entity * +media_entity_graph_walk_next(struct media_entity_graph *graph); +__must_check int media_entity_pipeline_start(struct media_entity *entity, + struct media_pipeline *pipe); +void media_entity_pipeline_stop(struct media_entity *entity); + +#define media_entity_call(entity, operation, args...) \ + (((entity)->ops && (entity)->ops->operation) ? \ + (entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD) + +#endif -- cgit 1.2.3-korg