Tuners in general convert a high frequency carrier into an Intermediate
Frequency (IF).

Digital tuners like tda18271, xc3028, etc. generally allow changing the IF
frequency, although they generally have recommented settings for the IF.
Analog tuners, have a fixed IF frequency, that depends on the physical
characteristics of some analog components.

For digital tuners, it makes sense to have ways to configure IF,
via the tuner's configuration structure, like what's done inside the
tda18271-fe maps.

The demods need to know what IF is used by the tuner, as it will need
to convert internally from IF into baseband. Currently, the bridge driver
needs to fill a per-demod configuration struct for it, or pass it via
a dvb_attach parameter.

The tda18271 datasheet recommends to use different IF's for different
delivery system types and for different bandwidths.

The DRX-K demod also needs to know the IF frequency in order to work,
just like all other demods. However, as it accepts different delivery
systems (DVB-C and DVB-T), the IF may change if the standard and/or
bandwidth is changed.

So, the usual procedure of passing it via a config struct doesn't work.

One might try to code it as two separate IF frequencies, or even as a
table in function of the delivery system and the bandwidth, but this
will be messy.

So, it is better and simpler to just add a new callback for it and
require the tuners that can be used with MFE frontends like drx-k
to implement a new callback to return the used IF.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: NAntti Palosaari <crope@iki.fi>

Makes it more straight-forward to follow stack traces if the functions
don't have generic names. Using this as a crutch while trying to better
understand the lockdep warnings I get when loading the em28xx driver.

CC: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: NJarod Wilson <jarod@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

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

The one in-tree videobuf2-dma-sg driver (mmp-camera) has no need for a
kernel-space mapping of the buffers; one suspects that most other drivers
would not either.  The videobuf2-dma-sg module does the right thing if
buf->vaddr == NULL - it maps the buffer on demand if somebody needs it.  So
let's not map the buffer at allocation time; that will save a little CPU
time and a lot of address space in the vmalloc range.
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

  - fepriv->parameters_out isn't protected by events->mtx, so
    move the call to fe->ops.get_frontend out of the locked area.
  - move the assignment of e->status into the locked area.

  - use direct assignment instead of memcpy.

  - use mutex_lock instead of mutex_lock_interruptible, because
    all code paths protected by this mutex won't block.
Signed-off-by: NAndreas Oberritter <obi@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

  the first event after an attempt to tune.
Signed-off-by: NAndreas Oberritter <obi@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

  enqueued before the frontend thread wakes up.
Signed-off-by: NAndreas Oberritter <obi@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

  Modify it to use the data given by the user.
Signed-off-by: NAndreas Oberritter <obi@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Delete nontrivial initialization that is immediately overwritten by the
result of an allocation function.

The semantic match that makes this change is as follows:

// <smpl>
@@
type T;
identifier i;
expression e;
@@

(
T i = \(0\|NULL\|ERR_PTR(...)\);
|
-T i = e;
+T i;
)
... when != i
i = \(kzalloc\|kcalloc\|kmalloc\)(...);

// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

> [34883.426065] tm6000 #0: registered device video0
> [34883.430591] Trident TVMaster TM5600/TM6000/TM6010 USB2 board (Load status: 0)
> [34883.437763] usbcore: registered new interface driver tm6000
> [34884.608372] BUG: unable to handle kernel NULL pointer dereference at 00000002
> [34884.615514] IP: [<f8c4ceea>] tm6000_reset+0xd7/0x11c [tm6000]

The dev->int_in USB interfaces is used by some devices for the
Remote Controller. Not all devices seem to define this interface,
so, tm6000_reset should not try to set the interface to it on
such devices.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When releasing hardware resources, the DMA buffer allocated to the PCM
device needs to be freed to prevent a memory leak.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

If the radio device is opened there is no need to initialize the video
buffer queue because it is not used.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When the last user closes the device, perform a lightweight reset of the
device to bring it into a well-known state.

Note that this is not always enough with the TM6010, which sometimes
needs a hard reset to get into a working state again.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This fixes a memory leak where isochronous buffers would be set up for
each video buffer, while it is sufficient to set them up only once per
device.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When the USB device is disconnected, the device usage bit is not cleared
properly. This leads to errors when a device is unplugged and replugged
several times until all TM6000_MAXBOARDS bits are used and keeps the
driver from binding to the device.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This commit introduces the usb_lock mutex to ensure that a USB request
always gets the proper response. While this is currently not really
necessary it will become important as there are more users.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This commit uses sentinel entries to terminate the TV standard register
tables instead of hard-coding their size, allowing further entries to be
added more easily. It is also more space-efficient if the tables have a
varying number of entries.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Video data is useless in radio mode, so the corresponding interface can
be safely disabled. This should reduce the amount of isochronous traffic
noticeably.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The register ACTIVE_VIDEO_IF register should be named ACTIVE_IF since it
controls more than just the video interface.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This brings the IRQ callback implementation more in line with how other
drivers do it.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

In radio mode, the correct input is rinput. The pseudo index 5 is used
but cannot be used to index the vinput array because that only has 3
elements.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This commit fixes a number of coding style issues as well as some issues
reported by checkpatch and sparse.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

In radio mode, no frequency offset should be used.

Instead of taking Thierry's patch that creates a separate function
to calculate the digital offset, it seemed better to just keep
everything at the same place.
Reported-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When loading the firmware, complete each chunk by sending an I2C flush
command to the frontend. Some devices like the tm6000 seem to require
this to properly flush the I2C buffers.

The current code in tm6000 executes the flush command once after each
I2C transfer, which slows down the firmware loading especially when
loading large BASE type images.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The ccdc block in the omap3isp produces events whenever it starts receiving
a new frame. A private HS_VS event was used for this previously. Now, the
generic V4L2_EVENT_FRAME_SYNC event is being used for the purpose.

This patch also provides the frame sequence number to user space.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Define a frame sync event to tell user space when the reception of a frame
starts.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NJose Alberto Reguero <jareguero@telefonica.net>
Reviewed-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch reduces the number of available choices for the notch filter type control
so that the standard-specific filter types cannot be selected. It is now limited to
being either 0 (4xFsc, the default) or 1 (square pixel optimized).
The patch also removes the initialization of this control from cx88_reset(), since
that is already done by init_controls(), which is called by cx8800_initdev().
Signed-off-by: NIstvan Varga <istvan_v@mailbox.hu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Use the more current logging styles with pr_fmt.
Remove now unnecessary private include.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Deduplicate printk formats to save ~20KB text.

$ size drivers/media/common/tuners/tda18271*o.*
   text	   data	    bss	    dec	    hex	filename
  10747	     56	   1920	  12723	   31b3	drivers/media/common/tuners/tda18271-common.o.new
  18889	     56	   3112	  22057	   5629	drivers/media/common/tuners/tda18271-common.o.old
  20561	    204	   4264	  25029	   61c5	drivers/media/common/tuners/tda18271-fe.o.new
  31093	    204	   6000	  37297	   91b1	drivers/media/common/tuners/tda18271-fe.o.old
   3681	   6760	    440	  10881	   2a81	drivers/media/common/tuners/tda18271-maps.o.new
   5631	   6760	    680	  13071	   330f	drivers/media/common/tuners/tda18271-maps.o.old
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

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

Thanks to Thomas Gutzler for reporting this.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Cc: Thomas Gutzler <thomas.gutzler@gmail.com>
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>

Convert array index from the loop bound to the loop index.

A simplified version of the semantic patch that fixes this problem is as

// <smpl>
@@
expression e1,e2,ar;
@@

for(e1 = 0; e1 < e2; e1++) { <...
  ar[
- e2
+ e1
  ]
  ...> }
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

[media] Add support for new revision of KNC 1 DVB-C cards. Using tda10024 instead of tda10023, which is compatible to tda10023 driver
Signed-off-by: NJulian Scheel <julian@jusst.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NBenjamin Larsson <benjamin@southpole.se>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Driver for Kworld UB499-2T (id 1b80:e409)

The device driver has been named it913x, so that support for other family members
can be added later.

TODOs
Firmware support for other it913x devices.
Remote control support, there are two known types.
Signed-off-by: NMalcolm Priestley <tvboxspy@gmail.com>
[mchehab@redhat.com: Fix a merge conflict]
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>