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path: root/drivers/media/video/v4l2-device.c
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* [media] v4l2: add v4l2_prio_state to v4l2_device and video_deviceHans Verkuil2011-03-221-0/+1
| | | | | | | | | | Integrate the v4l2_prio_state into the core, ready for use. One struct v4l2_prio_state is added to v4l2_device and a pointer to a prio state is added to video_device. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l: Make v4l2_subdev inherit from media_entityLaurent Pinchart2011-03-221-4/+32
| | | | | | | | | | | | | | V4L2 subdevices are media entities. As such they need to inherit from (include) the media_entity structure. When registering/unregistering the subdevice, the media entity is automatically registered/unregistered. The entity is acquired on device open and released on device close. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi> Acked-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l: Add a media_device pointer to the v4l2_device structureLaurent Pinchart2011-03-221-6/+7
| | | | | | | | | | | | | | | | | The pointer will later be used to register/unregister media entities when registering/unregistering a v4l2_subdev or a video_device. With the introduction of media devices, device drivers need to store a pointer to a driver-specific structure in the device's drvdata. v4l2_device can't claim ownership of the drvdata anymore. To maintain compatibility with drivers that rely on v4l2_device storing a pointer to itself in the device's drvdata, v4l2_device_register() will keep doing so if the drvdata is NULL. 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>
* [media] v4l: subdev: Add device node supportLaurent Pinchart2011-03-211-0/+37
| | | | | | | | | | | | | 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: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Vimarsh Zutshi <vimarsh.zutshi@gmail.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-device: fix 'use-after-freed' oopsHans Verkuil2011-01-191-0/+2
| | | | | | | | | | | | | | | | | | | | | Fix a bug in v4l2_device_unregister where the sd pointer can be dereferenced after it was freed. Normally the i2c adapter is removed before this function is called. Removing the adapter will also unregister all subdevs on that adapter, so generally v4l2_device_unregister has nothing to do. However, in the case of a platform i2c bus that bus is generally not freed. In that case, after freeing the i2c subdevice the code will fall into the second block when it tests if the subdev is a SPI device. But by that time the subdev is already freed and the kernel oopses. The fix is trivial: continue with the loop after freeing the i2c or spi subdevice. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Reported-by: Daniel Drake <dsd@laptop.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-subdev: add (un)register internal opsHans Verkuil2011-01-191-2/+12
| | | | | | | | | | | | | | | | | | | Some subdevs need to call into the board code after they are registered and have a valid struct v4l2_device pointer. The s_config op was abused for this, but now that it is removed we need a cleaner way of solving this. So this patch adds a struct with internal ops that the v4l2 core can call. Currently only two ops exist: register and unregister. Subdevs can implement these to call the board code and pass it the v4l2_device pointer, which the board code can then use to get access to the struct that embeds the v4l2_device. It is expected that in the future open and close ops will also be added. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] V4L: improve the BKL replacement heuristicHans Verkuil2010-12-011-0/+1
| | | | | | | | | | | | | The BKL replacement mutex had some serious performance side-effects on V4L drivers. It is replaced by a better heuristic that works around the worst of the side-effects. Read the v4l2-dev.c comments for the whole sorry story. This is a temporary measure only until we can convert all v4l drivers to use unlocked_ioctl. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l2: hook up the new control framework into the core frameworkHans Verkuil2010-08-081-0/+7
| | | | | | | | | | Add the calls needed to automatically merge subdev controls into a bridge control handler. Hook up the control framework in __video_ioctl2 and video_register_device. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: Add SPI support to V4L2Dmitri Belimov2010-05-181-0/+11
| | | | | | | | | Add support SPI bus to v4l2. Useful for control some device with SPI bus like hardware MPEG2 encoders and etc. Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11936): Fix v4l2-device usage of i2c_unregister_device()Randy Dunlap2009-06-161-1/+1
| | | | | | | | Fix v4l2-device usage of i2c_unregister_device() and handle the case of CONFIG_I2C=m & CONFIG_MEDIA_VIDEO=y. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11758): 2: handle unregister for non-I2C buildsRandy Dunlap2009-06-161-0/+2
| | | | | | | | | | Build fails when CONFIG_I2C=n, so handle that case in the if block: drivers/built-in.o: In function `v4l2_device_unregister': (.text+0x157821): undefined reference to `i2c_unregister_device' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11673): v4l2-device: unregister i2c_clients when unregistering the ↵Hans Verkuil2009-06-161-1/+12
| | | | | | | | | | | | | v4l2_device. Until now I relied on i2c_del_adapter to unregister the i2c_clients for me, however, if the i2c bus is a platform bus then it is never deleted. So instead I need to unregister i2c clients when unregistering the v4l2_device. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11671): v4l2: add v4l2_device_set_name()Hans Verkuil2009-06-161-0/+16
| | | | | | | | Add a utility function that can be used to setup the v4l2_device's name field in a standard manner. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11044): v4l2-device: add v4l2_device_disconnectHans Verkuil2009-03-301-4/+11
| | | | | | | | | 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. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10644): v4l2-subdev: rename dev field to v4l2_devHans Verkuil2009-03-301-6/+6
| | | | | | | | | 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. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10643): v4l2-device: allow a NULL parent device when registering.Hans Verkuil2009-03-301-13/+24
| | | | | | | | | 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. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* v4l: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-03-241-1/+1
| | | | | | | Cc: mchehab@infradead.org Cc: linux-media@vger.kernel.org Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
* V4L/DVB (10181): v4l2-device: Fix some sparse warningsMauro Carvalho Chehab2009-01-071-2/+2
| | | | | | | /home/v4l/master/v4l/v4l2-device.c:32:2: warning: Using plain integer as NULL pointer /home/v4l/master/v4l/v4l2-device.c:64:2: warning: Using plain integer as NULL pointer Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9820): v4l2: add v4l2_device and v4l2_subdev structs to the v4l2 ↵Hans Verkuil2008-12-301-0/+86
framework. 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). 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> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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