linux.git/include/media/v4l2-dev.h, branch v2.6.30

V4L/DVB (11242): allow v4l2 drivers to provide a get_unmapped_area handler

2009-03-30T15:43:43+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (10138): v4l2-ioctl: change to long return type to match unlocked_ioctl.

2009-01-02T19:11:34+00:00

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

V4L/DVB (10135): v4l2: introduce v4l2_file_operations.

2009-01-02T19:11:12+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (9974): v4l2-dev: allow drivers to pass v4l2_device as parent

2008-12-30T11:39:35+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

V4L/DVB (9973): v4l2-dev: use the release callback from device instead of cdev

2008-12-30T11:39:35+00:00

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 
Signed-off-by: Mauro Carvalho Chehab

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