Multiple user-space application instances can open the same video device, but
it only makes sense for one of them to manage the videobuffer queue and set
video format of the device. Restrict soc-camera respectively.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Many video drivers implement a fixed set of frame formats and thus face a task
of finding the best match for a user-requested format. Implementing this in a
generic function has also an advantage, that different drivers with similar
supported format sets will select the same format for the user, which improves
consistency across drivers.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This allows userspace to terminate a capture without waiting for the current
frame to complete.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
In the current source status the emma has no limitation for any PIXFMT
since the data is parsed raw and unprocessed into the memory.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
V4L1 is deprecated and will be removed completely soon.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The initial em28xx std (PAL) was not passed on to the subdevs. This led to
these tvp5150 kernel log errors when running v4l2-ctl --all:
tvp5150 0-005c: VBI can't be configured without knowing number of lines
The reason was that tvp5150 was still using its own internal default: STD_ALL.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
videobuf_waiton() must unlock and relock ext_lock if it has to wait.
For that to happen it needs the videobuf_queue pointer.
Don't attempt to unlock/relock q->ext_lock unless it was locked in the
first place.
vb->state has to be protected by a spinlock to be safe.
This patch is based on code from Mauro Carvalho Chehab <mchehab@redhat.com>.
[mchehab@redhat.com: add extra argument to a few missing places]
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Add an ext_lock argument to the videobuf init functions. This allows
drivers to pass the vdev->lock pointer (or any other externally held lock)
to videobuf. For now all drivers just pass NULL.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Currently videobuf uses the vb_lock mutex to lock its data structures.
But this locking will (optionally) move into the v4l2 core, which means
that in that case vb_lock shouldn't be used since the external lock is already
held.
Prepare for this by adding a pointer to such an external mutex and
don't lock if that pointer is set.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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>
Until now all fops except release and (unlocked_)ioctl returned an error
after the device node was unregistered. Extend this as well to the ioctl
fops. There is nothing useful that an application can do here and it
complicates the driver code unnecessarily.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The driver author seems to not worked on this driver since its conversion
from 2.2 to 2.4. Nobody is known to have a stradis hardware for testing. As
it still uses V4L1 API, BKL and probably some other old stuff, someone would
need to work on it to preserve the driver. Instead of investing time and
efforts to keep porting it to work with new API's, it seems better to just
drop the driver.
So, let's move it to drivers/staging and label it to die at 2.6.38, if nobody
cares enough to port parallel port support to gspca or to create a new driver
that uses the same gspca-cpia sub-driver.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
cpia driver were re-written inside gspca driver, for USB devices. The only
functionality that were not migrated is the support for parallel port,
as:
1) the developer didn't find any hardware;
2) it doesn't seem important to keep support for a parallel port webcam,
as this is an obsolete technology;
3) the changes at gspca for it to work with parallel port would be very large;
4) this driver still uses BKL.
So, let's move it to drivers/staging and label it to die at 2.6.38, if nobody
cares enough to port parallel port support to gspca or to create a new driver
that uses the same gspca-cpia sub-driver.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
There are a few ancillary static routines used by ioctl functions
that takes bttv lock internally. As we'll be adding the same lock
for all ioctl's that need, we need to properly document them, to
avoid doing double locks
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
mpc512x kernel configurations without SPI support do not build:
drivers/media/video/fsl-viu.c: In function 'viu_open':
drivers/media/video/fsl-viu.c:1248: error: implicit declaration of function 'kzalloc'
drivers/media/video/fsl-viu.c:1248: warning: assignment makes pointer from integer without a cast
drivers/media/video/fsl-viu.c: In function 'viu_release':
drivers/media/video/fsl-viu.c:1335: error: implicit declaration of function 'kfree'
If CONFIG_SPI is enabled, the slab.h will be included in
linux/spi/spi.h which is included by media/v4l2-common.h
and the fsl_viu.c driver builds.
Let's incluce linux/slab.h directly to fix the build breakage.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The bt8xx driver only uses the big kernel lock in its dst_ca_ioctl
function and never to serialize against other code, so we can
trivially replace it with a private mutex.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The dvb core only uses the big kernel lock in the open
and ioctl functions, which means it can be replaced with
a dvb specific mutex. Fortunately, all the ioctl functions
go through dvb_usercopy, so we can move the serialization
in there.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Just fill the array as necessary and terminate with 0
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Code in function cx22702_set_tps() can be slightly simplified.
Apparently gcc was smart enough to optimize it anyway, but it can't
hurt to make the code more readable.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The init sequence never changes so it can be marked const. Likewise,
cx22702_ops is a template and can thus be made read-only.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Calling the same functions in if/else or switch/case branches is
inefficient. Refactor the code for a smaller binary and increased
readability.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This allows the removal of CONFIG_INPUT from saa7134, and
helps to create a better Kconfig dependency hierarchy.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The tda8425 initialization function sets up the inputmap for riva boards.
After some digging I discovered that this was for the V4L rivatv driver
that is found on sourceforge. This driver hasn't been maintained since the
last 5 years and will no longer work with the current v4l framework.
So we can safely remove this.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
These variables are either unconditionally set right afterward, or
already set to 0 by kzalloc.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Get rid of init_MUTEX[_LOCKED]() and use sema_init() instead.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Currently, they get set up with the pad keytable, which they can't
actually use at all. Also add another variant of volume scancodes from
another 0xffdc device, and properly set up the 0x9e 0xffdc device as an
iMON VFD w/MCE proto IR.
Based on data and a prior patch from Anders Eriksson on the lirc list.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Lest we get our keycodes wrong... Thus far, in practice, I've not found
it to actually matter, but its one of the issues raised in
https://bugzilla.kernel.org/show_bug.cgi?id=16351 that wasn't addressed
by converting to using native IR keydown/up functions.
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This is a stab at separating the mouse (and front panel/knob) events
out to a separate input device. This is necessary in preparation for
the next patch which makes the rc-core input dev opaque to rc
drivers.
I can't verify the correctness of the patch beyond the fact that it
compiles without warnings. The driver has resisted most of my
attempts at understanding it properly...for example, the double calls
to le64_to_cpu() and be64_to_cpu() which are applied in
imon_incoming_packet() and imon_panel_key_lookup() would amount
to a bswab64() call, irregardless of the cpu endianness, and I think
the code wouldn't have worked on a big-endian machine...
- Minor alterations to apply with minimal core IR changes
- Use timer for imon keys too, since its entirely possible for the
receiver to miss release codes (either by way of another key being
pressed while the first is held or by the remote pointing away from
the recevier when the key is release. yes, I know, its ugly).
- Bump driver version number, since this is a fairly significant change
(for the much much better).
Tested successfully w/an imon knob receiver.
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
