mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
217 lines
7.1 KiB
217 lines
7.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
|
/* |
|
* v4l2-mc.h - Media Controller V4L2 types and prototypes |
|
* |
|
* Copyright (C) 2016 Mauro Carvalho Chehab <[email protected]> |
|
* Copyright (C) 2006-2010 Nokia Corporation |
|
* Copyright (c) 2016 Intel Corporation. |
|
*/ |
|
|
|
#ifndef _V4L2_MC_H |
|
#define _V4L2_MC_H |
|
|
|
#include <media/media-device.h> |
|
#include <media/v4l2-dev.h> |
|
#include <media/v4l2-subdev.h> |
|
#include <linux/types.h> |
|
|
|
/* We don't need to include pci.h or usb.h here */ |
|
struct pci_dev; |
|
struct usb_device; |
|
|
|
#ifdef CONFIG_MEDIA_CONTROLLER |
|
/** |
|
* v4l2_mc_create_media_graph() - create Media Controller links at the graph. |
|
* |
|
* @mdev: pointer to the &media_device struct. |
|
* |
|
* Add links between the entities commonly found on PC customer's hardware at |
|
* the V4L2 side: camera sensors, audio and video PLL-IF decoders, tuners, |
|
* analog TV decoder and I/O entities (video, VBI and Software Defined Radio). |
|
* |
|
* .. note:: |
|
* |
|
* Webcams are modelled on a very simple way: the sensor is |
|
* connected directly to the I/O entity. All dirty details, like |
|
* scaler and crop HW are hidden. While such mapping is enough for v4l2 |
|
* interface centric PC-consumer's hardware, V4L2 subdev centric camera |
|
* hardware should not use this routine, as it will not build the right graph. |
|
*/ |
|
int v4l2_mc_create_media_graph(struct media_device *mdev); |
|
|
|
/** |
|
* v4l_enable_media_source() - Hold media source for exclusive use |
|
* if free |
|
* |
|
* @vdev: pointer to struct video_device |
|
* |
|
* This interface calls enable_source handler to determine if |
|
* media source is free for use. The enable_source handler is |
|
* responsible for checking is the media source is free and |
|
* start a pipeline between the media source and the media |
|
* entity associated with the video device. This interface |
|
* should be called from v4l2-core and dvb-core interfaces |
|
* that change the source configuration. |
|
* |
|
* Return: returns zero on success or a negative error code. |
|
*/ |
|
int v4l_enable_media_source(struct video_device *vdev); |
|
|
|
/** |
|
* v4l_disable_media_source() - Release media source |
|
* |
|
* @vdev: pointer to struct video_device |
|
* |
|
* This interface calls disable_source handler to release |
|
* the media source. The disable_source handler stops the |
|
* active media pipeline between the media source and the |
|
* media entity associated with the video device. |
|
* |
|
* Return: returns zero on success or a negative error code. |
|
*/ |
|
void v4l_disable_media_source(struct video_device *vdev); |
|
|
|
/* |
|
* v4l_vb2q_enable_media_tuner - Hold media source for exclusive use |
|
* if free. |
|
* @q - pointer to struct vb2_queue |
|
* |
|
* Wrapper for v4l_enable_media_source(). This function should |
|
* be called from v4l2-core to enable the media source with |
|
* pointer to struct vb2_queue as the input argument. Some |
|
* v4l2-core interfaces don't have access to video device and |
|
* this interface finds the struct video_device for the q and |
|
* calls v4l_enable_media_source(). |
|
*/ |
|
int v4l_vb2q_enable_media_source(struct vb2_queue *q); |
|
|
|
/** |
|
* v4l2_create_fwnode_links_to_pad - Create fwnode-based links from a |
|
* source subdev to a sink subdev pad. |
|
* |
|
* @src_sd: pointer to a source subdev |
|
* @sink: pointer to a subdev sink pad |
|
* |
|
* This function searches for fwnode endpoint connections from a source |
|
* subdevice to a single sink pad, and if suitable connections are found, |
|
* translates them into media links to that pad. The function can be |
|
* called by the sink subdevice, in its v4l2-async notifier subdev bound |
|
* callback, to create links from a bound source subdevice. |
|
* |
|
* .. note:: |
|
* |
|
* Any sink subdevice that calls this function must implement the |
|
* .get_fwnode_pad media operation in order to verify endpoints passed |
|
* to the sink are owned by the sink. |
|
* |
|
* Return 0 on success or a negative error code on failure. |
|
*/ |
|
int v4l2_create_fwnode_links_to_pad(struct v4l2_subdev *src_sd, |
|
struct media_pad *sink); |
|
|
|
/** |
|
* v4l2_create_fwnode_links - Create fwnode-based links from a source |
|
* subdev to a sink subdev. |
|
* |
|
* @src_sd: pointer to a source subdevice |
|
* @sink_sd: pointer to a sink subdevice |
|
* |
|
* This function searches for any and all fwnode endpoint connections |
|
* between source and sink subdevices, and translates them into media |
|
* links. The function can be called by the sink subdevice, in its |
|
* v4l2-async notifier subdev bound callback, to create all links from |
|
* a bound source subdevice. |
|
* |
|
* .. note:: |
|
* |
|
* Any sink subdevice that calls this function must implement the |
|
* .get_fwnode_pad media operation in order to verify endpoints passed |
|
* to the sink are owned by the sink. |
|
* |
|
* Return 0 on success or a negative error code on failure. |
|
*/ |
|
int v4l2_create_fwnode_links(struct v4l2_subdev *src_sd, |
|
struct v4l2_subdev *sink_sd); |
|
|
|
/** |
|
* v4l2_pipeline_pm_get - Increase the use count of a pipeline |
|
* @entity: The root entity of a pipeline |
|
* |
|
* Update the use count of all entities in the pipeline and power entities on. |
|
* |
|
* This function is intended to be called in video node open. It uses |
|
* struct media_entity.use_count to track the power status. The use |
|
* of this function should be paired with v4l2_pipeline_link_notify(). |
|
* |
|
* Return 0 on success or a negative error code on failure. |
|
*/ |
|
int v4l2_pipeline_pm_get(struct media_entity *entity); |
|
|
|
/** |
|
* v4l2_pipeline_pm_put - Decrease the use count of a pipeline |
|
* @entity: The root entity of a pipeline |
|
* |
|
* Update the use count of all entities in the pipeline and power entities off. |
|
* |
|
* This function is intended to be called in video node release. It uses |
|
* struct media_entity.use_count to track the power status. The use |
|
* of this function should be paired with v4l2_pipeline_link_notify(). |
|
*/ |
|
void v4l2_pipeline_pm_put(struct media_entity *entity); |
|
|
|
|
|
/** |
|
* v4l2_pipeline_link_notify - Link management notification callback |
|
* @link: The link |
|
* @flags: New link flags that will be applied |
|
* @notification: The link's state change notification type (MEDIA_DEV_NOTIFY_*) |
|
* |
|
* React to link management on powered pipelines by updating the use count of |
|
* all entities in the source and sink sides of the link. Entities are powered |
|
* on or off accordingly. The use of this function should be paired |
|
* with v4l2_pipeline_pm_{get,put}(). |
|
* |
|
* Return 0 on success or a negative error code on failure. Powering entities |
|
* off is assumed to never fail. This function will not fail for disconnection |
|
* events. |
|
*/ |
|
int v4l2_pipeline_link_notify(struct media_link *link, u32 flags, |
|
unsigned int notification); |
|
|
|
#else /* CONFIG_MEDIA_CONTROLLER */ |
|
|
|
static inline int v4l2_mc_create_media_graph(struct media_device *mdev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline int v4l_enable_media_source(struct video_device *vdev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void v4l_disable_media_source(struct video_device *vdev) |
|
{ |
|
} |
|
|
|
static inline int v4l_vb2q_enable_media_source(struct vb2_queue *q) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline int v4l2_pipeline_pm_get(struct media_entity *entity) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void v4l2_pipeline_pm_put(struct media_entity *entity) |
|
{} |
|
|
|
static inline int v4l2_pipeline_link_notify(struct media_link *link, u32 flags, |
|
unsigned int notification) |
|
{ |
|
return 0; |
|
} |
|
|
|
#endif /* CONFIG_MEDIA_CONTROLLER */ |
|
#endif /* _V4L2_MC_H */
|
|
|