msix * l4( (  fB- uC_I|+# /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * v4l2-mc.h - Media Controller V4L2 types and prototypes * * Copyright (C) 2016 Mauro Carvalho Chehab * Copyright (C) 2006-2010 Nokia Corporation * Copyright (c) 2016 Intel Corporation. */ #ifndef _V4L2_MC_H #define _V4L2_MC_H #include #include #include #include /* 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 pad. * * @src_sd: pointer to a source subdev * @sink: pointer to a sink pad * @flags: the link flags * * 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, in its v4l2-async notifier bound callback, to create * links from a bound source subdevice. * * The @flags argument specifies the link flags. The caller shall ensure that * the flags are valid regardless of the number of links that may be created. * For instance, setting the MEDIA_LNK_FL_ENABLED flag will cause all created * links to be enabled, which isn't valid if more than one link is created. * * .. note:: * * Any sink subdevice that calls this function must implement the * .get_fwnode_pad media operation in order to verif