This patch adds a documentation for VIDIOC_{G/S}_SELECTION ioctl. Moreover, the
patch adds the description of modeling of composing, cropping and scaling
features in V4L2. Finally, some examples are presented.
Signed-off-by: NTomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch adds images in binary format for the V4L2 selection API.
Signed-off-by: NTomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch introduces new api for a precise control of cropping and composing
features for video devices. The new ioctls are VIDIOC_S_SELECTION and
VIDIOC_G_SELECTION.
Signed-off-by: NTomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Fix some issues pointed out by Mauro.
Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Allow use of that general callback for demod too.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The card definition of the Terratec Cinergy 200 USB uses the
wrong tuner type. Therefore some channels are currently missing.
Attached patch fixes this problem.
Signed-off-by: NSascha Sommer <saschasommer@freenet.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The MaxPacketSize for em2800 based devices is too small to capture at full resolution.
Therefore scale down when the maximum frame size is selected.
The previous workaround that simply reduced the X resolution cannot be used
because it crops a part of the input as
the em2800 can only scale down with a factor of 0.5.

reverts commits 1ca31892 and fb3de039.

[mchehab@redhat.com: Fix CodingStyle]
Signed-off-by: NSascha Sommer <saschasommer@freenet.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

writing the EM28XX_R06_I2C_CLK register leads to the problem that the
i2c bus on the Terratec Cinergy 200 USB is no longer usable when the
system is rebooted.

The device needs to be unplugged in order to bring it back to life.
Attached patch conditionally disables the write in
em28xx_pre_card_setup() like it is already done in em28xx_card_setup().
Signed-off-by: NSascha Sommer <saschasommer@freenet.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

It looks like the return value check that is done after setting the I2C
speed checks the wrong return code.
Signed-off-by: NSascha Sommer <saschasommer@freenet.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The 'struct em28xx *' pointer was passed by reference to the
em28xx_init_dev() function, for no reason. Instead, just pass it by
value, which is much more logical and simple.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The af9005_properties and af9015_properties tables make use of USB ids
from the USB id tables with hardcoded indices, as in
"&af9015_usb_table[30]".  Adding new entries before the end breaks
such references, so everyone has had to carefully tiptoe to only add
entries at the end of the list.

In the spirit of "dw2102: use symbolic names for dw2102_table
indices", use C99-style initializers with symbolic names for each
index to avoid this.  In the new regime, properties tables referring
to the USB ids have names like "&af9015_usb_table[CINERGY_T_STICK_RC]"
that do not change meaning when items in the USB id table are
reordered.
Encouraged-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Acked-by: NLuca Olivetti <luca@ventoso.org>
Acked-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

URBs allocated with usb_alloc_urb() are allocated from DMA-coherent
areas, and therefore it is not necessary to call dma_map_single() on
such buffers. Worst, on ARM, calling dma_map_single() on a
DMA-coherent buffer will trigger a BUG_ON() in
arch/arm/mm/dma-mapping.c.

Therefore, we mark all URBs allocated with usb_alloc_urb() with the
URB_NO_TRANSFER_DMA_MAP transfer_flags, so that the USB core does not
do dma_map_single()/dma_unmap_single() on those buffers.

This is similar to 882787ff for the
gspca driver, and has already been discussed on the linux-media list
in the past:
http://www.mail-archive.com/linux-media@vger.kernel.org/msg37086.html.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The 'struct cx231xx *' pointer was passed by reference to the
cx231xx_init_dev() function, for no reason. Instead, just pass it by
value, which is much more logical and simple.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

DVB-T did not work at all - only 6 MHz was working but it is not
commonly used.
Fix it.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The driver were using DEV_MISCONFIGURED on some places, and
DEV_DISCONNECTED on others. In a matter of fact, DEV_MISCONFIGURED
were set only during the usb disconnect callback, with
was confusing.

Also, the alsa driver never checks if the device is present,
before doing some dangerous things.

Remove DEV_MISCONFIGURED, replacing it by DEV_DISCONNECTED.

Also, fixes the other usecases for DEV_DISCONNECTED.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

cx231xx_devused is racy. Re-implement it in a proper way,
to remove the risk of mangling it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

There are several weirdness at the unregister logic.

First of all, IR has a poll thread. This thread needs to be
removed, as it uses some resources associated to the main driver.
So, the driver needs to explicitly unregister the I2C client for
ir-kbd-i2c.

If, for some reason, the driver needs to wait for a close()
to happen, not all memories will be freed, because the free
logic were in the wrong place.

Also, v4l2_device_unregister() seems to be called too early,
as devices are still using it.

Finally, even with the device disconnected, there is one
USB function call that will still try to talk with it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Reports the auto-detected parameters to userspace.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

If the device got removed, stops polling it. Also, un-registers
it at input/evdev, as it won't work anymore. We can't free the
IR structure yet, as the ir_remove method will be called later.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now that we set the intfdata on the right interface, the 'lif'
variable is useless.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The following sequence of commands was triggering a kernel crash in
cdev_get():

 modprobe cx231xx
 rmmod cx231xx
 modprobe cx231xx
 v4l2grab -n 1

The problem was that cx231xx_usb_disconnect() was not doing anything
because the test:

	if (!dev->udev)
		return;

was reached (i.e, dev->udev was NULL).

This is due to the fact that the 'dev' pointer placed as intfdata into
the usb_interface structure had the wrong value, because
cx231xx_probe() was doing the usb_set_intfdata() on the wrong
usb_interface structure. For some reason, cx231xx_probe() was doing
the following:

static int cx231xx_usb_probe(struct usb_interface *interface,
			     const struct usb_device_id *id)
{
        struct usb_interface *lif = NULL;
	[...]
        /* store the current interface */
        lif = interface;
	[...]
        /* store the interface 0 back */
        lif = udev->actconfig->interface[0];
	[...]
	usb_set_intfdata(lif, dev);
	[...]
	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
	[...]
}

So, the usb_set_intfdata() was done on udev->actconfig->interface[0]
and not on the 'interface' passed as argument to the ->probe() and
->disconnect() hooks. Later on, v4l2_device_register() was
initializing the intfdata of the correct usb_interface structure as a
pointer to the v4l2_device structure.

Upon unregistration, the ->disconnect() hook was getting the intfdata
of the usb_interface passed as argument... and casted it to a 'struct
cx231xx *' while it was in fact a 'struct v4l2_device *'.

The correct fix seems to just be to set the intfdata on the proper
interface from the beginning. Now, loading/unloading/reloading the
driver allows to use the device properly.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As reported by Toralf:

the build failed with :
  CC [M]  drivers/media/dvb/dvb-core/dvb_ca_en50221.o
In file included from arch/x86/include/asm/uaccess.h:573:0,
                 from include/linux/poll.h:14,
                 from drivers/media/dvb/dvb-core/dvbdev.h:27,
                 from drivers/media/dvb/dvb-core/dvb_ca_en50221.h:27,
                 from drivers/media/dvb/dvb-core/dvb_ca_en50221.c:41:
In function "copy_from_user", inlined from "dvb_ca_en50221_io_write" at drivers/media/dvb/dvb-core/dvb_ca_en50221.c:1314:26: arch/x86/include/asm/uaccess_32.h:211:26: error: call to "copy_from_user_overflow" declared with attribute error: copy_from_user() buffer size is not provably correct
Reported-by: NToralf Foerster <toralf.foerster@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMario Ceresa <mrceresa@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

These callbacks allow a host video driver
to poll video formats supported by tvp5150.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The patch "dm1105: handle errors from dvb_net_init" moved the
initialization of dvbnet to before frontend attachment but forgot
to adjust the error handling when frontend attachment fails.
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This module does some printks with the loglevel missing.

pr_err() takes care of adding the KERN_ERR tag and the module name.
So we can simplify the code and add the missing printk loglevel by
using it.

Also add a #define pr_fmt() to make this work, and remove a few
unnecessary periods at the end of messages and bump the loglevel of
"Unknown bttv card type" from KERN_WARNING to KERN_ERR while at it.
Inspired-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This way, the messages will be tagged with KERN_DEBUG and not clutter
the log from dmesg unless the "debug" module parameter is set.

[mchehab@redhat.com: whitespace fixes]
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Lift assignments from "if" conditionals for readability.  No change
in functionality intended.
Suggested-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NStefan Ringel <linuxtv@stefanringel.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This code is wrong as I should have coded it as SYS_DVBC, instead of
SYS_DVBS & friends. Anyway, this check has other problems

1) it does some "magic" by assuming that all QAM modulations are below
  QAM_AUTO;

2) it checks modulation parameters only for one delivery system.
   Or the core should check invalid parameters for all delivery
   systems, or it should let the frontend drivers do it;

3) frontend drivers should already be checking for invalid parameters
   (most of them do it, anyway);

4) not all modulations are mapped at fe->ops.info.caps, so it is not
   even possible to check for the valid modulations inside the core
   for some delivery systems;

5) The core check is incomplete anyway: it only checks for a few
   parameters. If moved into the core other parameters like bandwidth
   and fec should also be checked;

6) 2nd gen DVB-C uses OFDM. So, that test would fail for it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As reported by Oliver, some old dead code were preserved there.

Thanks-to: Oliver endriss <o.endriss@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add support for two new types of Leadtek Winfast TV 2000XP tuner

The author of this patch is Istvan Varga.
Only resending current reformated version against current git.
Signed-off-by: NMiroslav Slugen <thunder.mmm@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

If ctrls->count is too high the multiplication could overflow and
array_size would be lower than expected.  Mauro and Hans Verkuil
suggested that we cap it at 1024.  That comes from the maximum
number of controls with lots of room for expantion.

$ grep V4L2_CID include/linux/videodev2.h | wc -l
211

Cc: stable <stable@vger.kernel.org>
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Smatch complains that i can be one passed the end of the array if we
don't hit the break statement.  We should be using the "audio" here like
we do in the other places.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This is just a cleanup, it doesn't change how the code works.  These
are compound conditions and not bitwise operations so it should be &&
and not &.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>