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path: root/include/media/v4l2-dev.h
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* [media] v4l2-dev: add new VFL_DIR_ definesHans Verkuil2012-09-26
| | | | | | | | | These will be used by v4l2-dev.c to improve ioctl checking. I.e. ioctls for capture should return -ENOTTY when called for an output device. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev: remove V4L2_FL_LOCK_ALL_FOPSHans Verkuil2012-08-09
| | | | | | | | All drivers that needed V4L2_FL_LOCK_ALL_FOPS have been converted, so remove this flag altogether. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev/ioctl.c: add vb2_queue support to video_deviceHans Verkuil2012-07-06
| | | | | | | | | | | | This prepares struct video_device for easier integration with vb2. It also introduces a new lock that protects the vb2_queue. It is up to the driver to use it or not. And the driver can associate an owner filehandle with the queue to check whether queuing requests are permitted for the calling filehandle. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev: rename two functionsHans Verkuil2012-05-14
| | | | | | | | Rename the function v4l2_dont_use_lock to v4l2_disable_ioctl_locking, and rename v4l2_dont_use_cmd to v4l2_disable_ioctl. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev.h: add comment not to use V4L2_FL_LOCK_ALL_FOPS in new driversHans Verkuil2012-05-14
| | | | | | | | | | | | | | | | | | This flag is for legacy drivers only and will go away in the future. A note regarding commit 5126f2590bee412e3053de851cb07f531e4be36a (v4l2-dev: add flag to have the core lock all file operations): That commit message suggests that by not taking the core lock for fops other than unlocked_ioctl all problems relating to AB-BA locking and mm->mmap_sem are solved. This is not the case. More work needs to be done by moving the core lock further down into video_ioctl2. It should only be taken after the copy_from/to_user calls are done. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev: add flag to have the core lock all file operationsHans Verkuil2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This used to be the default if the lock pointer was set, but now that lock is by default only used for ioctl serialization. Those drivers that already used core locking have this flag set explicitly, except for some drivers where it was obvious that there was no need to serialize any file operations other than ioctl. The drivers that didn't need this flag were: drivers/media/radio/dsbr100.c drivers/media/radio/radio-isa.c drivers/media/radio/radio-keene.c drivers/media/radio/radio-miropcm20.c drivers/media/radio/radio-mr800.c drivers/media/radio/radio-tea5764.c drivers/media/radio/radio-timb.c drivers/media/video/vivi.c sound/i2c/other/tea575x-tuner.c The other drivers that use core locking and where it was not immediately obvious that this flag wasn't needed were changed so that the flag is set together with a comment that that driver needs work to avoid having to set that flag. This will often involve taking the core lock in the fops themselves. Eventually this flag should go and it should not be used in new drivers. There are a few reasons why we want to avoid core locking of non-ioctl fops: in the case of mmap this can lead to a deadlock in rare situations since when mmap is called the mmap_sem is held and it is possible for other parts of the code to take that lock as well (copy_from_user()/copy_to_user() perform a down_read(&mm->mmap_sem) when a page fault occurs). It is very unlikely that that happens since the core lock serializes all fops, but the kernel warns about it if lock validation is turned on. For poll it is also undesirable to take the core lock as that can introduce increased latency. The same is true for read/write. While it was possible to make flags or something to turn on/off taking the core lock for each file operation, in practice it is much simpler to just not take it at all except for ioctl and leave it to the driver to take the lock. There are only a handful fops compared to the zillion ioctls we have. I also wanted to make it obvious which drivers still take the lock for all fops, so that's why I chose to have drivers set it explicitly. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev/ioctl: determine the valid ioctls upfrontHans Verkuil2012-05-14
| | | | | | | | | | | | | | | | | Rather than testing whether an ioctl is implemented in the driver or not every time the ioctl is called, do it upfront when the device is registered. This also allows a driver to disable certain ioctls based on the capabilities of the detected board, something you can't do today without creating separate v4l2_ioctl_ops structs for each new variation. For the most part it is pretty straightforward, but for control ioctls a flag is needed since it is possible that you have per-filehandle controls, and that can't be determined upfront of course. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2-dev: make it possible to skip locking for selected ioctlsHans Verkuil2012-05-14
| | | | | | | | | | | | | | | | | | | | | | | | Using the V4L2 core lock is a very robust method that is usually very good at doing the right thing. But some drivers, particularly USB drivers, may want to prevent the core from taking the lock for specific ioctls, particularly buffer queuing ioctls. The reason is that certain commands like S_CTRL can take a long time to process over USB and all the time the core has the lock, preventing VIDIOC_DQBUF from proceeding, even though a frame may be ready in the queue. This introduces unwanted latency. Since the buffer queuing commands often have their own internal lock it is often not necessary to take the core lock. Drivers can now say that they don't want the core to take the lock for specific ioctls. As it is a specific opt-out it makes it clear to the reviewer that those ioctls will need more care when reviewing. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l: Add custom compat_ioctl32 operationLaurent Pinchart2012-03-19
| | | | | | | | | | | | | | Drivers implementing custom ioctls need to handle 32-bit/64-bit compatibility themselves. Provide them with a way to do so. To avoid circular module dependencies, merge the v4l2-compat-ioctl32 module into videodev. There is no point in keeping them separate, as the v4l2_compat_ioctl32() function is required by videodev if CONFIG_COMPAT is set anyway. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l: Fix media_entity_to_video_device macro argument nameLaurent Pinchart2011-06-01
| | | | | | | | | | | | The name 'entity' is used twice in the macro body, once as the macro argument, and once as a structure field name. This breaks compilation if the macro is called with its argument not named 'entity'. Fix this by renaming the macro argument '__e'. This should avoid namespace clashes. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] Revert "V4L/DVB: v4l2-dev: remove get_unmapped_area"Bob Liu2011-05-20
| | | | | | | This reverts commit c29fcff3daafbf46d64a543c1950bbd206ad8c1c. Signed-off-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2: use new flag to enable core priority handlingHans Verkuil2011-03-22
| | | | | | | | | | | Rather than guess which driver supports core priority handling, require drivers that do to explicitly set the V4L2_FL_USE_FH_PRIO flag in video_device. Updated the core prio handling accordingly and set the flag in the three drivers that do. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l2: add v4l2_prio_state to v4l2_device and video_deviceHans Verkuil2011-03-22
| | | | | | | | | | 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] v4l2_prio: move from v4l2-common to v4l2-devHans Verkuil2011-03-22
| | | | | | | | | We are going to move priority handling into the v4l2 core. As a consequence the v4l2_prio helper functions need to be moved into the core videodev module as well to prevent circular dependencies. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* [media] v4l: Make video_device inherit from media_entityLaurent Pinchart2011-03-22
| | | | | | | | | | | | | | V4L2 devices are media entities. As such they need to inherit from (include) the media_entity structure. When registering/unregistering the device, 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: subdev: Add device node supportLaurent Pinchart2011-03-21
| | | | | | | | | | | | | 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>
* V4L/DVB: v4l2: add core serialization lockHans Verkuil2010-10-20
| | | | | | | | | | | | | | | | | | Drivers can optionally set a pointer to a mutex in struct video_device. The core will use that to lock before calling open, read, write, unlocked_ioctl, poll, mmap or release. Updated the documentation as well and ensure that v4l2-event knows about the lock: it will unlock it before doing a blocking wait on an event and relock it afterwards. Ensure that the 'video_is_registered' check is done when the lock is held: a typical disconnect will take the lock as well before unregistering the device nodes, so to prevent race conditions the video_is_registered check should also be done with the lock held. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l2-dev: remove get_unmapped_areaHans Verkuil2010-10-20
| | | | | | | The get_unmapped_area file operation is unused. Remove. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: videotext: remove this obsolete APIHans Verkuil2010-10-20
| | | | | | | | | | | | | | | | | | | | | | | | Remove the vtx (aka videotext aka teletext) API from the v4l2 core. This API was scheduled for removal in kernel 2.6.35. The vtx device nodes have been superseded by vbi device nodes for many years. No applications exist that use the vtx support. Of the two i2c drivers that actually support this API the saa5249 has been impossible to use for a year now and no known hardware that supports this device exists. The saa5246a is theoretically supported by the old mxb boards, but it never actually worked. In summary: there is no hardware that can use this API and there are no applications actually implementing this API. The vtx support still reserves minors 192-223 and we would really like to reuse those for upcoming new functionality. In the unlikely event that new hardware appears that wants to use the functionality provided by the vtx API, then that functionality should be build around the sliced VBI API instead. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: v4l2: Add new control handling frameworkHans Verkuil2010-08-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new framework to handle controls which makes life for driver developers much easier. Note that this patch moves some of the control support that used to be in v4l2-common.c to v4l2-ctrls.c. The tables were copied unchanged. The body of v4l2_ctrl_query_fill() was copied to a new v4l2_ctrl_fill() function in v4l2-ctrls.c. This new function doesn't use the v4l2_queryctrl struct anymore, which makes it more general. The remainder of v4l2-ctrls.c is all new. Highlights include: - No need to implement VIDIOC_QUERYCTRL, QUERYMENU, S_CTRL, G_CTRL, S_EXT_CTRLS, G_EXT_CTRLS or TRY_EXT_CTRLS in either bridge drivers or subdevs. New wrapper functions are provided that can just be plugged in. Once everything has been converted these wrapper functions can be removed as well. - When subdevices are added their controls can be automatically merged with the bridge driver's controls. - Most drivers just need to implement s_ctrl to set the controls. The framework handles the locking and tries to be as 'atomic' as possible. - Ready for the subdev device nodes: the same mechanism applies to subdevs and their device nodes as well. Sub-device drivers can make controls local, preventing them from being merged with bridge drivers. - Takes care of backwards compatibility handling of VIDIOC_S_CTRL and VIDIOC_G_CTRL. Handling of V4L2_CID_PRIVATE_BASE is fully transparent. CTRL_CLASS controls are automatically added. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB: V4L: File handlesSakari Ailus2010-05-19
| | | | | | | | | | | This patch adds a list of v4l2_fh structures to every video_device. It allows using file handle related information in V4L2. The event interface is one example of such use. The use of v4l2_fh is not mandatory for drivers. Signed-off-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13552): v4l: Replace video_is_unregistered with video_is_registeredLaurent Pinchart2009-12-15
| | | | | | | | | | | | | | Replace the video_is_unregistered function by a video_is_registered function. The V4L2_FL_UNREGISTERED flag is replaced by a V4L2_FL_REGISTERED flag. This change makes the video_is_registered function return coherent results when called on an initialize but not yet registered video_device instance. The function can now be used instead of checking video_device::minor. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13549): v4l: Add video_device_node_name functionLaurent Pinchart2009-12-15
| | | | | | | | | Many drivers access the device number (video_device::v4l2_devnode::num) in order to print the video device node name. Add and use a helper function to retrieve the video_device node name. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12725): v4l: warn when desired devnodenr is in use & add _no_warn ↵Hans Verkuil2009-09-18
| | | | | | | | | | | function 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. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12541): v4l: remove video_register_device_indexHans Verkuil2009-09-18
| | | | | | | | | | | 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. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11242): allow v4l2 drivers to provide a get_unmapped_area handlerDaniel Glöckner2009-03-30
| | | | | | | | | Shared memory mappings on nommu machines require a get_unmapped_area file operation that suggests an address for the mapping. This patch adds a way for v4l2 drivers to provide this callback. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10138): v4l2-ioctl: change to long return type to match unlocked_ioctl.Hans Verkuil2009-01-02
| | | | | | | | | | | | | Since internal to v4l2 the ioctl prototype is the same regardless of it being called through .ioctl or .unlocked_ioctl, we need to convert it all to the long return type of unlocked_ioctl. Thanks to Jean-Francois Moine for posting an initial patch for this and thus bringing it to our attention. Cc: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10135): v4l2: introduce v4l2_file_operations.Hans Verkuil2009-01-02
| | | | | | | | | | | | | | | | Introduce a struct v4l2_file_operations for v4l2 drivers. Remove the unnecessary inode argument. Move compat32 handling (and llseek) into the v4l2-dev core: this is now handled in the v4l2 core and no longer in the drivers themselves. Note that this changeset reverts an earlier patch that changed the return type of__video_ioctl2 from int to long. This change will be reinstated later in a much improved version. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9974): v4l2-dev: allow drivers to pass v4l2_device as parentHans Verkuil2008-12-30
| | | | | | | | | | | Drivers that use v4l2_device can set that as parent pointer in the v4l2_dev field instead of using the struct device parent field. This allows v4l2-dev.c to check whether this driver is v4l2_device based, and if so then it can offer additional services. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9973): v4l2-dev: use the release callback from device instead of cdevHans Verkuil2008-12-30
| | | | | | | | | | | Instead of relying on the cdev release callback we should rely on the release callback from the device struct. This requires that we use get_device/put_device to do proper refcounting. In order to do this safely v4l2-dev.c now sets up its own file_operations that call out to the driver's ops. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9133): v4l: disconnect kernel number from minorHans Verkuil2008-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | The v4l core creates four different video devices (video, vbi, radio, vtx) and each has its own range of minor numbers. However, modern devices keep increasing the number of devices that they need so a maximum of 64 video devices will not be enough in the future. In addition this scheme makes it very hard to add new device types. This patch disconnects the kernel number allocation (e.g. video0, video1, etc.) from the actual minor number (just pick the first free minor). This allows for much more flexibility in the future. However, it does require the use of udev. For those who cannot use udev a new CONFIG option was created that changes the allocation scheme back to the old behavior. Thanks to Greg KH for suggesting this approach during the 2008 LPC. In addition, several bugs were fixed in the ivtv and cx18 drivers: these drivers try to allocate specific kernel numbers but that scheme contained a bug which caused what should have been e.g. video17 to appear as e.g. video2. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8852): v4l2: use register_chrdev_region instead of register_chrdevHans Verkuil2008-10-12
| | | | | | | | | | | | | | | Replace the old register_chrdev with the more flexible register_chrdev_region. Ensure that the release() is called when the very last chardev usage was released, and not when the sysfs devices were removed. This should simplify hotpluggable drivers considerably. Tested-by: Mike Isely <isely@isely.net> Tested-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Acked-by: David Ellingsworth <david@identd.dyndns.org> Reviewed-by: Hans de Goede <j.w.r.degoede@hhs.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8787): v4l2-dev: cleanups and add video_drvdata helper functionHans Verkuil2008-10-12
| | | | | | | | | Cleanup v4l2-dev.[ch], add/improve comments and add a new helper function: video_drvdata() that can get the private driver data from a file struct. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8786): v4l2: remove the priv field, use dev_get_drvdata insteadHans Verkuil2008-10-12
| | | | | | | | | | Remove the priv field and let video_get/set_drvdata use dev_get_drvdata and dev_set_drvdata instead. Convert all drivers that still used priv directly. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8785): v4l2: add __must_check to v4l2_dev.hHans Verkuil2008-10-12
| | | | | Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8782): v4l2-dev: add video_device_release_emptyHans Verkuil2008-10-12
| | | | | | | | | | | | Add a second release function: video_device_release_empty It can be used by drivers that have statically allocated video_device structs. Its use usually, but not always, indicates laziness on the part of the driver programmer. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8781): v4l2-dev: remove obsolete video_exclusive_open/releaseHans Verkuil2008-10-12
| | | | | Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8525): fix a few assorted spelling mistakes.Hans Verkuil2008-07-27
| | | | | Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8523): v4l2-dev: remove unused type and type2 field from video_deviceHans Verkuil2008-07-27
| | | | | | | | | The type and type2 fields were unused and so could be removed. Instead add a vfl_type field that contains the type of the video device. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8488): videodev: remove some CONFIG_VIDEO_V4L1_COMPAT code from ↵Hans Verkuil2008-07-26
| | | | | | | | | | | | v4l2-dev.h The video_device_create_file and video_device_remove_file functions can be removed from v4l2-dev.h, removing the dependency on videodev.h in v4l2-dev.h. Also removed a few more videodev.h includes that should have been videodev2.h. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8483): Remove obsolete owner field from video_device struct.Hans Verkuil2008-07-26
| | | | | | | | According to an old comment this should have been removed in 2.6.15. Better late than never... Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8482): videodev: move all ioctl callbacks to a new v4l2_ioctl_ops ↵Hans Verkuil2008-07-26
| | | | | | | | | | | | | struct All ioctl callbacks are now stored in a new v4l2_ioctl_ops struct. Drivers fill in a const struct v4l2_ioctl_ops and video_device just contains a const pointer to it. This ensures a clean separation between the const ops struct and the non-const video_device struct. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8430): videodev: move some functions from v4l2-dev.h to ↵Hans Verkuil2008-07-23
| | | | | | | | | | | | | v4l2-common.h or v4l2-ioctl.h The functions in a header should not belong to another module. The prio functions belong to v4l2-common.c, so move them to v4l2-common.h. The ioctl functions belong to v4l2-ioctl.c, so create a new v4l2-ioctl.h header and move those functions to it. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8429): videodev: renamed 'class_dev' to 'dev'Hans Verkuil2008-07-23
| | | | | | | | | The class_dev field is a normal device, not a class device. This is very confusing and now that the old 'dev' field has been renamed to 'parent' we can rename 'class_dev' to just 'dev'. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8428): videodev: rename 'dev' to 'parent'Hans Verkuil2008-07-23
| | | | | | | | The field 'dev' is not the video device, but the parent of the video device. Rename accordingly. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8387): Some cosmetic changesHans Verkuil2008-07-20
| | | | | | | Those changes, together with some proper patches, will allow out-of-tree compilation for for kernels < 2.6.19 Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8103): videodev: fix/improve ioctl debuggingHans Verkuil2008-07-20
| | | | | | | | | | | | | | | | | Various ioctl debugging fixes and improvements: - use %x rather than %d for control IDs and bitmask fields - make two arrays const - show the whole control array for the ext_ctrl ioctls - print pix_fmt for V4L2_BUF_TYPE_VIDEO_OUTPUT - show full type name rather than an integer - fix CROPCAP debugging - fix G/S_TUNER debugging - show error code in case of an error - other small cleanups Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8078): Introduce "index" attribute for persistent video4linux ↵brandon@ifup.org2008-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | device nodes A number of V4L drivers have a mod param to specify their preferred minors. This is because it is often desirable for applications to have a static /dev name for a particular device. However, using minors has several disadvantages: 1) the requested minor may already be taken 2) using a mod param is driver specific 3) it requires every driver to add a param 4) requires configuration by hand This patch introduces an "index" attribute that when combined with udev rules can create static device paths like this: /dev/v4l/by-path/pci-0000\:00\:1d.2-usb-0\:1\:1.0-video0 /dev/v4l/by-path/pci-0000\:00\:1d.2-usb-0\:1\:1.0-video1 /dev/v4l/by-path/pci-0000\:00\:1d.2-usb-0\:1\:1.0-video2 $ ls -la /dev/v4l/by-path/pci-0000\:00\:1d.2-usb-0\:1\:1.0-video0 lrwxrwxrwx 1 root root 12 2008-04-28 00:02 /dev/v4l/by-path/pci-0000:00:1d.2-usb-0:1:1.0-video0 -> ../../video1 These paths are steady across reboots and should be resistant to rearranging across Kernel versions. video_register_device_index is available to drivers to request a specific index number. Signed-off-by: Brandon Philips <bphilips@suse.de> Signed-off-by: Kees Cook <kees@outflux.net> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7949): videodev: renamed the vidioc_*_fmt_* callbacksHans Verkuil2008-07-20
| | | | | | | | | The naming for the callbacks that handle the VIDIOC_ENUM_FMT and VIDIOC_S/G/TRY_FMT ioctls was very confusing. Renamed it to match the v4l2_buf_type name. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (7948): videodev: add missing vidioc_try_fmt_sliced_vbi_output and ↵Hans Verkuil2008-07-20
| | | | | | | | | | | | | VIDIOC_ENUMOUTPUT handling There was no vidioc_try_fmt_sliced_vbi_output, instead vidioc_try_fmt_vbi_output was reused. The VIDIOC_ENUMOUTPUT handling was missing altogether, even though the callback existed. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 13:36:37 -0500