linux.git/include/media/v4l2-dev.h, branch v2.6.28

V4L/DVB (9133): v4l: disconnect kernel number from minor

2008-10-12T11:37:16+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8852): v4l2: use register_chrdev_region instead of register_chrdev

2008-10-12T11:36:56+00:00

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 
Tested-by: Laurent Pinchart 
Signed-off-by: Hans Verkuil 
Acked-by: David Ellingsworth 
Reviewed-by: Hans de Goede 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8787): v4l2-dev: cleanups and add video_drvdata helper function

2008-10-12T11:36:54+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8786): v4l2: remove the priv field, use dev_get_drvdata instead

2008-10-12T11:36:54+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8785): v4l2: add __must_check to v4l2_dev.h

2008-10-12T11:36:54+00:00

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8782): v4l2-dev: add video_device_release_empty

2008-10-12T11:36:54+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8781): v4l2-dev: remove obsolete video_exclusive_open/release

2008-10-12T11:36:54+00:00

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8525): fix a few assorted spelling mistakes.

2008-07-27T14:07:13+00:00

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8523): v4l2-dev: remove unused type and type2 field from video_device

2008-07-27T14:07:10+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (8488): videodev: remove some CONFIG_VIDEO_V4L1_COMPAT code from v4l2-dev.h

2008-07-26T16:18:11+00:00

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 
Signed-off-by: Mauro Carvalho Chehab