- 22 Mar, 2011 9 commits
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Laurent Pinchart authored
Drivers often need to associate pipeline objects to entities, and to take stream state into account when configuring entities and links. The pipeline API helps drivers manage that information. When starting streaming, drivers call media_entity_pipeline_start(). The function marks all entities connected to the given entity through enabled links, either directly or indirectly, as streaming. Similarly, when stopping the stream, drivers call media_entity_pipeline_stop(). The media_entity_pipeline_start() function takes a pointer to a media pipeline and stores it in every entity in the graph. Drivers should embed the media_pipeline structure in higher-level pipeline structures and can then access the pipeline through the media_entity structure. Link configuration will fail with -EBUSY by default if either end of the link is a streaming entity, unless the link is marked with the MEDIA_LNK_FL_DYNAMIC flag. Signed-off-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by:
Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
Mauro Carvalho Chehab <mchehab@redhat.com>
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Laurent Pinchart authored
Create the following ioctl and implement it at the media device level to setup links. - MEDIA_IOC_SETUP_LINK: Modify the properties of a given link The only property that can currently be modified is the ENABLED link flag to enable/disable a link. Links marked with the IMMUTABLE link flag can not be enabled or disabled. Enabling or disabling a link has effects on entities' use count. Those changes are automatically propagated through the graph. Signed-off-by:
Stanimir Varbanov <svarbanov@mm-sol.com> Signed-off-by:
Sakari Ailus <sakari.ailus@iki.fi> Acked-by:
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Laurent Pinchart authored
Create the following two ioctls and implement them at the media device level to enumerate entities, pads and links. - MEDIA_IOC_ENUM_ENTITIES: Enumerate entities and their properties - MEDIA_IOC_ENUM_LINKS: Enumerate all pads and links for a given entity Entity IDs can be non-contiguous. Userspace applications should enumerate entities using the MEDIA_ENT_ID_FLAG_NEXT flag. When the flag is set in the entity ID, the MEDIA_IOC_ENUM_ENTITIES will return the next entity with an ID bigger than the requested one. Only forward links that originate at one of the entity's source pads are returned during the enumeration process. Signed-off-by:
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Laurent Pinchart authored
Create the following ioctl and implement it at the media device level to query device information. - MEDIA_IOC_DEVICE_INFO: Query media device information The ioctl and its data structure are defined in the new kernel header linux/media.h available to userspace applications. Signed-off-by:
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Laurent Pinchart authored
Due to the wide differences between drivers regarding power management needs, the media controller does not implement power management. However, the media_entity structure includes a use_count field that media drivers can use to track the number of users of every entity for power management needs. The use_count field is owned by media drivers and must not be touched by entity drivers. Access to the field must be protected by the media device graph_mutex lock. Signed-off-by:
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Sakari Ailus authored
Add media entity graph traversal. The traversal follows enabled links by depth first. Traversing graph backwards is prevented by comparing the next possible entity in the graph with the previous one. Multiply connected graphs are thus not supported. Signed-off-by:
Vimarsh Zutshi <vimarsh.zutshi@gmail.com> Acked-by:
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Laurent Pinchart authored
As video hardware pipelines become increasingly complex and configurable, the current hardware description through v4l2 subdevices reaches its limits. In addition to enumerating and configuring subdevices, video camera drivers need a way to discover and modify at runtime how those subdevices are connected. This is done through new elements called entities, pads and links. An entity is a basic media hardware building block. It can correspond to a large variety of logical blocks such as physical hardware devices (CMOS sensor for instance), logical hardware devices (a building block in a System-on-Chip image processing pipeline), DMA channels or physical connectors. A pad is a connection endpoint through which an entity can interact with other entities. Data (not restricted to video) produced by an entity flows from the entity's output to one or more entity inputs. Pads should not be confused with physical pins at chip boundaries. A link is a point-to-point oriented connection between two pads, either on the same entity or on different entities. Data flows from a source pad to a sink pad. Links are stored in the source entity. To make backwards graph walk faster, a copy of all links is also stored in the sink entity. The copy is known as a backlink and is only used to help graph traversal. The entity API is made of three functions: - media_entity_init() initializes an entity. The caller must provide an array of pads as well as an estimated number of links. The links array is allocated dynamically and will be reallocated if it grows beyond the initial estimate. - media_entity_cleanup() frees resources allocated for an entity. It must be called during the cleanup phase after unregistering the entity and before freeing it. - media_entity_create_link() creates a link between two entities. An entry in the link array of each entity is allocated and stores pointers to source and sink pads. When a media device is unregistered, all its entities are unregistered automatically. The code is based on Hans Verkuil <hverkuil@xs4all.nl> initial work. Signed-off-by:
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Laurent Pinchart authored
The media_device structure abstracts functions common to all kind of media devices (v4l2, dvb, alsa, ...). It manages media entities and offers a userspace API to discover and configure the media device internal topology. Signed-off-by:
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Laurent Pinchart authored
The media_devnode structure provides support for registering and unregistering character devices using a dynamic major number. Reference counting is handled internally, making device drivers easier to write without having to solve the open/disconnect race condition issue over and over again. The code is based on video/v4l2-dev.c. [mchehab@redhat.com: Remove linux/smp_lock.h include to not break compilation on bisect] Signed-off-by:
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- 21 Mar, 2011 31 commits
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Sakari Ailus authored
Provide v4l2_subdevs with v4l2_event support. Subdev drivers only need very little to support events. Signed-off-by:
David Cohen <dacohen@gmail.com> Signed-off-by:
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Laurent Pinchart authored
Pass the control-related ioctls to the subdev driver through the control framework. Signed-off-by:
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Laurent Pinchart authored
The function isn't small or performance sensitive enough to be inlined. Signed-off-by:
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Laurent Pinchart authored
Create a device node named subdevX for every registered subdev. As the device node is registered before the subdev core::s_config function is called, return -EGAIN on open until initialization completes. Signed-off-by:
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Laurent Pinchart authored
There's no reason to require subdevices to implement the core operations. Remove the check for non-NULL core operations when initializing the subdev. Signed-off-by:
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Laurent Pinchart authored
The two functions are mostly identical. They handle the copy_from_user and copy_to_user operations related with V4L2 ioctls and call the real ioctl handler. Create a __video_usercopy function that implements the core of video_usercopy and video_ioctl2, and call that function from both. Signed-off-by:
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Laurent Pinchart authored
vb2_get_plane_payload() gets the bytesused field for a plane, it doesn't set it. Signed-off-by:
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Justin P. Mattock authored
The patch below removes an extra "l" in the word. Signed-off-by:
Justin P. Mattock <justinmattock@gmail.com> Signed-off-by:
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Justin P. Mattock authored
The patch below removes an extra "l" in the word. Signed-off-by:
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Arnd Bergmann authored
Out of the three files accessing the device list, one uses a mutex, one uses the BKL and one does not have any locking. That is of course pointless, so let's make all of them use the same mutex, and get rid of one more BKL user. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Palash Bandyopadhyay <palash.bandyopadhyay@conexant.com> Signed-off-by:
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Dmitri Belimov authored
Add configuration of an audio for our new TV cards. With my best regards, Dmitry. Signed-off-by:
Beholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com> Signed-off-by:
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Igor M. Liplianin authored
Signed-off-by:
Igor M. Liplianin <liplianin@me.by> Signed-off-by:
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Igor M. Liplianin authored
Related to Acorp DS120 and some revisions of DVBWorld DW2102. If you read three or more registers at one time, you get wrong value for third etc. Actually, it didn't affect the driver as it reads registers only by one at a time. But it needs to correct. Signed-off-by:
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Igor M. Liplianin authored
Prof 7500 and TeVii s630, s660, s480 works better now Signed-off-by:
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Igor M. Liplianin authored
Prof 7500 and TeVii s630, s660, s480 works faster now Signed-off-by:
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Igor M. Liplianin authored
The card consist of PCI to USB bridge and USB DVB-S2 receiver. Signed-off-by:
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Igor M. Liplianin authored
It is taken from another tree, where it is modified. Patch to fix that Signed-off-by:
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Abylay Ospan authored
Signed-off-by:
Abylay Ospan <aospan@netup.ru> Signed-off-by:
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Igor M. Liplianin authored
Simptoms: After zapping DVB-S2 channel searching for DVB-S tooks long time. Now it takes less than a second. Signed-off-by:
Igor M. Liplianin <liplianin@netup.ru> Signed-off-by:
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Igor M. Liplianin authored
Signed-off-by:
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Dan Carpenter authored
dib9000_mbx_send_attr() returns an int. It doesn't work to save negative error codes in an unsigned char, so I've made "ret" an int type. Signed-off-by:
Dan Carpenter <error27@gmail.com> Signed-off-by:
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Dan Carpenter authored
kfree(state) if fe allocation fails. Signed-off-by:
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Matti Aaltonen authored
These changes are needed to keep up with the changes in the MFD core and V4L2 parts of the wl1273 FM radio driver. Use function pointers instead of exported functions for I2C IO. Also move all preprocessor constants from the wl1273.h to include/linux/mfd/wl1273-core.h. Also update the year in the copyright statement. Signed-off-by:
Matti J. Aaltonen <matti.j.aaltonen@nokia.com> Acked-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by:
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Matti Aaltonen authored
This module implements V4L2 controls for the Texas Instruments WL1273 FM Radio and handles the communication with the chip. Signed-off-by:
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Matti Aaltonen authored
This is the core of the WL1273 FM radio driver, it connects the two child modules. The two child drivers are drivers/media/radio/radio-wl1273.c and sound/soc/codecs/wl1273.c. The radio-wl1273 driver implements the V4L2 interface and communicates with the device. The ALSA codec offers digital audio, without it only analog audio is available. Signed-off-by:
Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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Mauro Carvalho Chehab authored
Signed-off-by: -
Mauro Carvalho Chehab authored
Those ioctls passed away. Properly documented it. Signed-off-by: -
Mauro Carvalho Chehab authored
A few changes happened at videodev2.h: - Addition of multiplane API; - removal of VIDIOC_*_OLD ioctls; - a few more video standards. Update the file to reflect the latest changes. Signed-off-by: -
Mauro Carvalho Chehab authored
Those ioctls were produced by the wrong arguments for _IO macros, and were replaced by fixed versions on an early 2.6 kernel. Signed-off-by: -
Randy Dunlap authored
RADIO_WL1273 needs to make sure that the mfd core is built to avoid build errors: ERROR: "mfd_add_devices" [drivers/mfd/wl1273-core.ko] undefined! ERROR: "mfd_remove_devices" [drivers/mfd/wl1273-core.ko] undefined! Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: Matti Aaltonen <matti.j.aaltonen@nokia.com> Signed-off-by:
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Daniel Drake authored
Add suspend/resume support to the via-camera driver, so that the video continues streaming over a suspend-resume cycle. Originally implemented by Jon Corbet. [mchehab@redhat.com: fix a small CodingStyle issue] Signed-off-by:
Daniel Drake <dsd@laptop.org> Acked-by:
Jonathan Corbet <corbet@lwn.net> Signed-off-by:
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