diff options
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-mc.c | 35 | ||||
| -rw-r--r-- | include/media/v4l2-dev.h | 1 | ||||
| -rw-r--r-- | include/media/v4l2-mc.h | 65 |
3 files changed, 100 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c index 4a1efa827fe2..643686d40551 100644 --- a/drivers/media/v4l2-core/v4l2-mc.c +++ b/drivers/media/v4l2-core/v4l2-mc.c @@ -2,6 +2,7 @@ * Media Controller ancillary functions * * Copyright (c) 2016 Mauro Carvalho Chehab <mchehab@osg.samsung.com> + * Copyright (C) 2016 Shuah Khan <shuahkh@osg.samsung.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -16,7 +17,10 @@ #include <linux/module.h> #include <media/media-entity.h> +#include <media/media-device.h> +#include <media/v4l2-fh.h> #include <media/v4l2-mc.h> +#include <media/videobuf2-core.h> int v4l2_mc_create_media_graph(struct media_device *mdev) @@ -182,3 +186,34 @@ int v4l2_mc_create_media_graph(struct media_device *mdev) return 0; } EXPORT_SYMBOL_GPL(v4l2_mc_create_media_graph); + +int v4l_enable_media_source(struct video_device *vdev) +{ + struct media_device *mdev = vdev->entity.graph_obj.mdev; + int ret; + + if (!mdev || !mdev->enable_source) + return 0; + ret = mdev->enable_source(&vdev->entity, &vdev->pipe); + if (ret) + return -EBUSY; + return 0; +} +EXPORT_SYMBOL_GPL(v4l_enable_media_source); + +void v4l_disable_media_source(struct video_device *vdev) +{ + struct media_device *mdev = vdev->entity.graph_obj.mdev; + + if (mdev && mdev->disable_source) + mdev->disable_source(&vdev->entity); +} +EXPORT_SYMBOL_GPL(v4l_disable_media_source); + +int v4l_vb2q_enable_media_source(struct vb2_queue *q) +{ + struct v4l2_fh *fh = q->owner; + + return v4l_enable_media_source(fh->vdev); +} +EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_source); diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index eeabf20e87a6..76056ab5c5bd 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -87,6 +87,7 @@ struct video_device #if defined(CONFIG_MEDIA_CONTROLLER) struct media_entity entity; struct media_intf_devnode *intf_devnode; + struct media_pipeline pipe; #endif /* device ops */ const struct v4l2_file_operations *fops; diff --git a/include/media/v4l2-mc.h b/include/media/v4l2-mc.h index 431380eb408b..5cbc20923faf 100644 --- a/include/media/v4l2-mc.h +++ b/include/media/v4l2-mc.h @@ -18,6 +18,7 @@ #define _V4L2_MC_H #include <media/media-device.h> +#include <media/v4l2-dev.h> /** * enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER @@ -116,11 +117,73 @@ struct usb_device; */ int v4l2_mc_create_media_graph(struct media_device *mdev); +/** + * v4l_enable_media_source() - Hold media source for exclusive use + * if free + * + * @vdev - poniter 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 - poniter 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); + #else + static inline int v4l2_mc_create_media_graph(struct media_device *mdev) { return 0; } +static int v4l_enable_media_source(struct video_device *vdev) +{ + return 0; +} + +static void v4l_disable_media_source(struct video_device *vdev) +{ + return; +} + +static int v4l_vb2q_enable_media_source(struct vb2_queue *q) +{ + return 0; +} + #endif -#endif +#endif /* _V4L2_MC_H */ |