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path: root/linux/Documentation/video4linux/v4l2-framework.txt
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2009-09-06v4l: warn when desired devnodenr is in use & add _no_warn functionHans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Warn when the desired device node number is already in use, except when the new video_register_device_no_warn function is called since in some use-cases that warning is not relevant. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-09-06v4l2-dev: replace 'kernel number' by 'device node number'.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> The term 'kernel number' is very vague, so replace it with the somewhat more descriptive term 'device node number'. In one place the local variable 'nr' was used to create the device node number of the new device name. This has been replaced with the vdev->num field to more clearly mark this as being the device node number and not the minor number. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-06-19v4l: remove video_register_device_indexHans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> video_register_device_index is never actually called, instead the stream index number is always calculated automatically. This patch removes this function and simplifies the internal get_index function since that can now always just return the first free index. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-08-10v4l: simplify v4l2_i2c_new_subdev and friendsHans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Rewrite v4l2_i2c_new_subdev as a simplified version of v4l2_i2c_new_subdev_cfg and remove v4l2_i2c_new_probed_subdev and v4l2_i2c_new_probed_subdev_addr. This simplifies this API substantially. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-06-09v4l2: update framework documentation.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-05-02v4l2: add v4l2_device_set_name()Mauro Carvalho Chehab
From: Hans Verkuil <hverkuil@xs4all.nl> Add a utility function that can be used to setup the v4l2_device's name field in a standard manner. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-04-05merge: http://www.linuxtv.org/hg/~hverkuil/v4l-dvbMauro Carvalho Chehab
From: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-04-01v4l: use usb_interface for v4l2_device_registerJanne Grunau
From: Janne Grunau <j@jannau.net> If usb_interface.dev is used as dev parameter for v4l2_device_register v4l2_dev.name contains the v4l driver/module name and usb device and interface instead of a simple "usb x-y". It also matches the recommendation to set the parent devices for usb drivers. Priority: normal Signed-off-by: Janne Grunau <j@jannau.net>
2009-04-01v4l2-common: add explicit v4l2_device pointer as first arg to ↵Hans Verkuil
new_(probed)_subdev From: Hans Verkuil <hverkuil@xs4all.nl> The functions v4l2_i2c_new_subdev and v4l2_i2c_new_probed_subdev relied on i2c_get_adapdata to return the v4l2_device. However, this is not always possible on embedded platforms. So modify the API to pass the v4l2_device pointer explicitly. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-04-01v4l2-common: remove legacy codeHans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Now that all drivers are converted to v4l2_subdev we can remove legacy code in v4l2-common. Also move the documentation of the internal API to v4l2-subdev.h where it really belongs. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-03-14v4l2-device: add v4l2_device_disconnectMauro Carvalho Chehab
From: Hans Verkuil <hverkuil@xs4all.nl> Call v4l2_device_disconnect when the parent of a hotpluggable device disconnects. This ensures that you do not have a pointer to a device that is no longer present. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-13merge: http://www.linuxtv.org/hg/~hverkuil/v4l-dvb-notifyMauro Carvalho Chehab
From: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-13v4l2-dev: use parent field if the v4l2_device has no parent set.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Normally the parent device of v4l2_device is used as the video device node's parent. But if it was not set, then use the parent field in the video_device struct. This is needed in the cx88 driver, which has one core v4l2_device but creates multiple pci devices (one each for raw and mpeg video). So you cannot associate the core v4l2_device with a particular PCI device, but you can do that for each video_device. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-03-12doc: improve the v4l2-framework documentation.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Emphasize the need to call i2c_set_adapdata and clarify the use of the chipid in v4l2_i2c_new_(probed_)device(). Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-03-08v4l2-device: add a notify callback.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Add a notify callback to v4l2_device to let sub-devices notify their parent of special events. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-02-14v4l2-subdev: rename dev field to v4l2_devHans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Remain consistent in the naming: fields pointing to v4l2_device should be called v4l2_dev. There are too many device-like entities without adding to the confusion by mixing naming conventions. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-02-14v4l2-device: allow a NULL parent device when registering.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Some drivers (e.g. for ISA devices) have no parent device because there is no associated bus driver. Allow the parent device to be NULL in those cases when registering v4l2_device. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2009-02-14v4l2-framework.txt: Fixes the videobuf init functionsMauro Carvalho Chehab
From: Mauro Carvalho Chehab <mchehab@redhat.com> Documents the driver usage functions, instead of the generic one used by the videobuf specific handlers. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-02-14v4l2-framework: documments videobuf usage on driversMauro Carvalho Chehab
From: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-02-07doc: use consistent naming conventions for vdev and v4l2_dev.Mauro Carvalho Chehab
From: Hans Verkuil <hverkuil@xs4all.nl> Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-01-15v4l2 doc: explain why v4l2_device_unregister_subdev() has to be called.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2008-12-30v4l2: debugging API changed to match against driver name instead of ID.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Since the i2c driver ID will be removed in the near future we have to modify the v4l2 debugging API to use the driver name instead of driver ID. Note that this API is not used in applications other than v4l2-dbg.cpp as it is for debugging and testing only. Should anyone use the old VIDIOC_G_CHIP_IDENT, then this will be logged with a warning that it is deprecated and will be removed in 2.6.30. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2008-12-23v4l2 doc: update v4l2-framework.txtHans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Mention the new v4l2_file_operations struct. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2008-12-23v4l2 doc: set v4l2_dev instead of parent.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Update the documentation now that the v4l2_dev field is in. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2008-12-22v4l2-framework: use correct comment style.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2008-12-19v4l2: document video_device.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Add the missing video_device documentation to v4l2-framework.txt. Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2008-11-30v4l2: add v4l2_device and v4l2_subdev structs to the v4l2 framework.Hans Verkuil
From: Hans Verkuil <hverkuil@xs4all.nl> Start implementing a proper v4l2 framework as discussed during the Linux Plumbers Conference 2008. Introduces v4l2_device (for device instances) and v4l2_subdev (representing sub-device instances). Priority: normal Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Reviewed-by: Laurent Pinchart <laurent.pinchart@skynet.be> Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviewed-by: Andy Walls <awalls@radix.net> Reviewed-by: David Brownell <david-b@pacbell.net>
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