diff options
Diffstat (limited to 'include/media/v4l2-mc.h')
| -rw-r--r-- | include/media/v4l2-mc.h | 143 |
1 files changed, 107 insertions, 36 deletions
diff --git a/include/media/v4l2-mc.h b/include/media/v4l2-mc.h index 79d84bb3573c..98a938aabdfb 100644 --- a/include/media/v4l2-mc.h +++ b/include/media/v4l2-mc.h @@ -2,6 +2,8 @@ * v4l2-mc.h - Media Controller V4L2 types and prototypes * * Copyright (C) 2016 Mauro Carvalho Chehab <mchehab@osg.samsung.com> + * Copyright (C) 2006-2010 Nokia Corporation + * Copyright (c) 2016 Intel Corporation. * * 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 @@ -18,6 +20,8 @@ #define _V4L2_MC_H #include <media/media-device.h> +#include <media/v4l2-dev.h> +#include <linux/types.h> /** * enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER @@ -86,12 +90,14 @@ enum if_aud_dec_pad_index { * @DEMOD_PAD_IF_INPUT: IF input sink pad. * @DEMOD_PAD_VID_OUT: Video output source pad. * @DEMOD_PAD_VBI_OUT: Vertical Blank Interface (VBI) output source pad. + * @DEMOD_PAD_AUDIO_OUT: Audio output source pad. * @DEMOD_NUM_PADS: Maximum number of output pads. */ enum demod_pad_index { DEMOD_PAD_IF_INPUT, DEMOD_PAD_VID_OUT, DEMOD_PAD_VBI_OUT, + DEMOD_PAD_AUDIO_OUT, DEMOD_NUM_PADS }; @@ -117,56 +123,121 @@ struct usb_device; int v4l2_mc_create_media_graph(struct media_device *mdev); /** - * v4l2_mc_pci_media_device_init() - create and initialize a - * struct &media_device from a PCI device. + * v4l_enable_media_source() - Hold media source for exclusive use + * if free * - * @pci_dev: pointer to struct pci_dev - * @name: media device name. If %NULL, the routine will use the default - * name for the pci device, given by pci_name() macro. + * @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_pipeline_pm_use - Update the use count of an entity + * @entity: The entity + * @use: Use (1) or stop using (0) the entity + * + * Update the use count of all entities in the pipeline and power entities on or + * off accordingly. + * + * This function is intended to be called in video node open (use == + * 1) and release (use == 0). 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. Powering entities + * off is assumed to never fail. No failure can occur when the use parameter is + * set to 0. */ -struct media_device *v4l2_mc_pci_media_device_init(struct pci_dev *pci_dev, - const char *name); +int v4l2_pipeline_pm_use(struct media_entity *entity, int use); + + /** - * __v4l2_mc_usb_media_device_init() - create and initialize a - * struct &media_device from a PCI device. - * - * @udev: pointer to struct usb_device - * @board_name: media device name. If %NULL, the routine will use the usb - * product name, if available. - * @driver_name: name of the driver. if %NULL, the routine will use the name - * given by udev->dev->driver->name, with is usually the wrong - * thing to do. - * - * NOTE: It is better to call v4l2_mc_usb_media_device_init() instead, as - * such macro fills driver_name with %KBUILD_MODNAME. + * 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_use(). + * + * 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. */ -struct media_device *__v4l2_mc_usb_media_device_init(struct usb_device *udev, - const char *board_name, - const char *driver_name); +int v4l2_pipeline_link_notify(struct media_link *link, u32 flags, + unsigned int notification); + +#else /* CONFIG_MEDIA_CONTROLLER */ -#else static inline int v4l2_mc_create_media_graph(struct media_device *mdev) { return 0; } -static inline -struct media_device *v4l2_mc_pci_media_device_init(struct pci_dev *pci_dev, - char *name) +static inline int v4l_enable_media_source(struct video_device *vdev) +{ + return 0; +} + +static inline void v4l_disable_media_source(struct video_device *vdev) { - return NULL; } -static inline -struct media_device *__v4l2_mc_usb_media_device_init(struct usb_device *udev, - char *board_name, - char *driver_name) +static inline int v4l_vb2q_enable_media_source(struct vb2_queue *q) { - return NULL; + return 0; } -#endif -#define v4l2_mc_usb_media_device_init(udev, name) \ - __v4l2_mc_usb_media_device_init(udev, name, KBUILD_MODNAME) +static inline int v4l2_pipeline_pm_use(struct media_entity *entity, int use) +{ + return 0; +} + +static inline int v4l2_pipeline_link_notify(struct media_link *link, u32 flags, + unsigned int notification) +{ + return 0; +} -#endif +#endif /* CONFIG_MEDIA_CONTROLLER */ +#endif /* _V4L2_MC_H */ |
