A lot of work was done in vb2 to regulate how drivers and the vb2 core handle
buffer ownership, but inexplicably the videobuf2-core.h comments were never
updated. Do so now. The same was true for the replacement of the -ENOBUFS
mechanism by the min_buffers_needed field.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Rather than always having to use a v4l2_ext_control struct to set
a control value from within a driver, switch to just setting the
new value. This is faster and it makes it possible to set more
complex types such as a string control as is added by this
patch.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This patch explicitly documents the relationship between bytesused and data_offset.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Now that the protocol is part of the scancode, it is pretty easy to merge
the rc5 and streamzap decoders. An additional advantage is that the decoder
is now stricter as it waits for the trailing silence before determining that
a command is a valid rc5/streamzap command (which avoids collisions that I've
seen with e.g. Sony protocols).
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

We already have dev->scancode_filter and dev->scancode_wakeup_filter
so rename dev->scanmask to dev->scancode_mask for consistency.
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The basic API of rc-core used to be:

	dev = rc_allocate_device();
	dev->x = a;
	dev->y = b;
	dev->z = c;
	rc_register_device();

which is a pretty common pattern in the kernel, after the introduction of
protocol arrays the API looks something like:

	dev = rc_allocate_device();
	dev->x = a;
	rc_set_allowed_protocols(dev, RC_BIT_X);
	dev->z = c;
	rc_register_device();

There's no real need for the protocols to be an array, so change it
back to be consistent (and in preparation for the following patches).

[m.chehab@samsung.com: added missing changes at some files]
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Simplify and cleanup the sysfs code a bit.

[m.chehab@samsung.com: rebased and fixed a CodingStyle issue]
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This driver codes the two address bytes in reverse order when compared to the
other drivers, so make it consistent (and update the keymap, note that the
result is a prefix change from 0x6b86 -> 0x866b, and the latter is pretty
common among the NECX keymaps. While not conclusive, it's still a strong hint
that the change is correct).
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Right now the protocol information is not preserved, rc-core gets handed a
scancode but has no idea which protocol it corresponds to.

This patch (which required reading through the source/keymap for all drivers,
not fun) makes the protocol information explicit which is important
documentation and makes it easier to e.g. support multiple protocols with one
decoder (think rc5 and rc-streamzap). The information isn't used yet so there
should be no functional changes.

[m.chehab@samsung.com: rebased, added cxusb and removed bad whitespacing]
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

the RC RX packet is defined as:

        struct dib0700_rc_response {
		...
                                u8 not_system;
                                u8 system;
		...
                u8 data;
                u8 not_data;

The NEC protocol transmits in the order:
        system
        not_system
        data
        not_data

Note that the code defines the NEC extended scancode as:

        scancode = be16_to_cpu(poll_reply->system16) << 8 | poll_reply->data;

i.e.

        scancode = poll_reply->not_system << 16 |
                   poll_reply->system     << 8  |
                   poll_reply->data;

Which, if the order *is* reversed, would mean that the scancode that
gets defined is in reality:

        scancode = poll_reply->system     << 16 |
                   poll_reply->not_system << 8  |
                   poll_reply->data;

Which is the same as the order used in drivers/media/rc/ir-nec-decoder.c.

This patch changes the code to match my assumption (the generated scancode
should, however, not change).

[m.chehab@samsung.com: rebased and fixed the decoding error message]
Signed-off-by: David Härdeman <david@hardeman.nu>
CC: Patrick Boettcher <pboettcher@kernellabs.com>
Tested-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The arguments used for ir-kbd-i2c's get_key() functions are not
really suited for rc-core and the ir_raw/ir_key distinction is
just confusing.

Convert all of them to return a protocol/scancode/toggle triple instead.
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The bt8xx driver does RC5 decoding for Nebula digi hardware, but includes
some pointless limitations (both start bits must be one, the
device/address/system must be 0x00). Remove those limitations and update
the keymap to use the full RC5 scancode (fortunately the 0x00 address
means that this is perfectly backwards compatible).
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

"ir" is already checked before calling unregister_from_lirc().
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

As reported by Vincent:
	[   16.332247] xc2028 0-0061: Loading firmware for type=BASE F8MHZ (3), id 0000000000000000.
	[   16.344378] cxusb: i2c wr: len=64 is too big!

64 bytes is too short for firmware load on this device. So, increase it
to 80 bytes.
Reported-by: Vincent McIntyre <vincent.mcintyre@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The DocBook documentation is incorrect: on ISDB-T, interleaving
time is always a power of 2. Fix it and provides a table showing
the actual interleaving length for each mode.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The programmed frequency on xc4000 is not the middle
frequency, but the initial frequency on the bandwidth range.
However, the DVB API works with the middle frequency.

This works fine on set_frontend, as the device calculates
the needed offset. However, at get_frequency(), the returned
value is the initial frequency. That's generally not a big
problem on most drivers, however, starting with changeset
6fe1099c, the frequency drift is taken into account at
dib7000p driver.

This broke support for PCTV 340e, with uses dib7000p demod and
xc4000 tuner.

Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The programmed frequency on xc5000 is not the middle
frequency, but the initial frequency on the bandwidth range.
However, the DVB API works with the middle frequency.

Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This meta-tag is used by some distros to help them package
the firmware and generate proper initrd images.

So, add the firmware names there.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The firmware name at:
   http://www.kernellabs.com/firmware/xc4000/

Is different from the one at the Kernel. Update it
try first the new name, falling back to the previous one
if the new name can't be found.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This patch removes the null test on ch. ch is initialized at the
beginning of the function to &demod->dtv_property_cache. Since demod
is dereferenced prior to the null test, demod must be a valid pointer,
and &demod->dtv_property_cache cannot be null.

The following Coccinelle script is used for detecting the change:

@r@
expression e,f;
identifier g,y;
statement S1,S2;
@@

*e = &f->g
<+...
 f->y
 ...+>
*if (e != NULL || ...)
 S1 else S2
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Instead of looking at the guard interval field, it was using
the interval length, with is wrong. Fix it.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Interleaving code was wrong at mb86a20s: instead, it was looking
at the Guard Interval. Fix it.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

The driver was reporting an incorrect mode, when mode 2
is selected.

While testing it, noticed that neither mode 1 or guard
interval 1/32 is supported by this device. Document it,
and ensure that it will report _AUTO when it doesn't lock,
in order to not report a wrong detection to userspace.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Implement read_ber for BER estimate.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

There was 32-bit calculation overflow. Use div_u64.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Cc: Antti Palosaari <crope@iki.fi>
Cc: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This cleans up some line over 80 character violations.
Signed-off-by: Emil Goode <emilgoode@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This removes checks of struct member addresses since they likely result
in the condition always being true. Also in the stb6100_get_bandwidth
and tda8261_get_bandwidth functions the pointers frontend_ops and
tuner_ops are assigned the same addresses twice.
Signed-off-by: Emil Goode <emilgoode@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

This updated patch also fixes out of bound access to b[].

In dib9000_risc_apb_access_write() an out of bound access to mb[].

The current test to avoid out of bound access to mb[] is insufficient.
For len = 19 non-existent mb[10] will be accessed.

For odd values of len b[] is accessed out of bounds.

For large values of len an of bound access to mb[] may occur in
dib9000_mbx_send_attr.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

>From the context this should be hex 0x80 instead of decimal 80.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

changeset a733291d didn't merge the fixes well. It ended by
restoring some bad logic removed there.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Acked-by: Antti Palosaari <crope@iki.fi>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

As reported by Kbuildtest:
	warning: (VIDEO_PVRUSB2 && VIDEO_TLG2300 && VIDEO_USBVISION && VIDEO_GO7007 && VIDEO_AU0828_V4L2 && VIDEO_CX231XX && VIDEO_TM6000 && VIDEO_EM28XX && VIDEO_IVTV && VIDEO_MXB && VIDEO_CX18 && VIDEO_CX23885 && VIDEO_CX88 && VIDEO_BT848 && VIDEO_SAA7134 && VIDEO_SAA7164) selects VIDEO_TUNER which has unmet direct dependencies (MEDIA_SUPPORT && MEDIA_TUNER)

That happens when:

	# CONFIG_MEDIA_ANALOG_TV_SUPPORT is not set
	CONFIG_MEDIA_DIGITAL_TV_SUPPORT=y
	# CONFIG_MEDIA_RADIO_SUPPORT is not set
	# CONFIG_MEDIA_SDR_SUPPORT is not set
	CONFIG_VIDEO_AU0828_V4L2=y
	CONFIG_VIDEO_CX231XX=y
	CONFIG_VIDEO_TM6000=y
	CONFIG_VIDEO_EM28XX=y
	CONFIG_VIDEO_TUNER=y
	CONFIG_MEDIA_SUPPORT=y

With means that we need to enable MEDIA_TUNER also when DTV
is enabled. While the above config doesn't cover, if we enable
SDR, the same error can also happen.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Now that the custom motion detection API in this driver has been
replaced with a standard API there is no reason anymore to keep it
in staging. So (finally!) move it to drivers/media/usb.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Now that the custom motion detection API has been replaced with a
standard API there is no reason anymore to keep it in staging.

So (finally!) move it to drivers/media/pci.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Similarly to workbuf_size and tempbuf_size, store iram_size in the
coda_devtype structure. This also decreases the IRAM used on i.MX6DL
to 128 KiB.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Similarly to the work buffer size, store the temporary buffer size in the
coda_devtype structure.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>