media: venus: fill missing video_device name

This fills missing (forgotten) video device name with
appropriate string so that udev can distinguishes between
decoder and encoder devices.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: venus: mark venc and vdec PM functions as __maybe_unused

Without PM support gcc could warns about unused functions, thus
mark runtime_suspend/resume as __maybe_unused.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ths8200: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: tc358743: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: saa7127: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: adv7842: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: adv7511: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ad9389b: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: usb: make i2c_adapter const

Make these const as they are only used in a copy operation.
Done using Coccinelle

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Mike Isely <isely@pobox.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: radio-usb-si4713: make i2c_adapter const

Make this const as it is only used in a copy operation.
Done using Coccinelle

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: pci: make i2c_adapter const

Make these const as they are only used in a copy operation.
Done using Coccinelle

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: i2c: make device_type const

Make this const as it is only stored in the type field of a device
structure, which is const.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: usb: make i2c_algorithm const

Make these const as they are only used in a copy operation or
are stored in the algo field of i2c_adapter structure, which is const.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Mike Isely <isely@pobox.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: stm32-cec: use CEC_CAP_DEFAULTS

Use the new CEC_CAP_DEFAULTS define in this driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: stih-cec: use CEC_CAP_DEFAULTS

Use the new CEC_CAP_DEFAULTS define in this driver.
This also adds the CEC_CAP_RC capability which was missing here
(and this is also the reason for this new define, to avoid missing
such capabilities).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: vivid: fix incorrect HDMI input/output CEC logging

Only the first HDMI input has a CEC adapter, so just report 'HDMI 0' as
the HDMI input name.

For the HDMI outputs use bus_cnt instead of i as the output number.
The HDMI name now corresponds to what 'v4l2-ctl --list-outputs' reports.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: vivid: add CEC pin monitoring emulation

Add support to emulate CEC pin monitoring. There are few hardware devices
that support this, so being able to emulate it here helps developing
software for this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cec: replace pin->cur_value by adap->cec_pin_is_high

The current CEC pin value (0 or 1) was part of the cec_pin struct,
but that assumes that CEC pin monitoring can only be used with
a driver that uses the low-level CEC pin framework.

But hardware that has both a high-level API and can monitor the
CEC pin at low-level at the same time does not need to depend on
the cec pin framework.

To support such devices remove the cur_value field from struct cec_pin
and add a cec_pin_is_high field to cec_adapter. This also makes it
possible to drop the '#ifdef CONFIG_CEC_PIN' in cec-api.c.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cec: ensure that adap_enable(false) is called from cec_delete_adapter()

When the adapter is removed the cec_delete_adapter() call attempts
to set the physical address to INVALID by calling __cec_s_phys_addr()
and so disabling the adapter.

However, __cec_s_phys_addr checks if the device node was unregistered
and just returns in that case.

This means that the adap_enable callback is never called with 'false'
to disable the CEC adapter. Most drivers don't care, but some need
to do cleanup here.

Change the test so the adapter is correctly disabled, even when the
device node is unregistered.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ddbridge: fix semicolon.cocci warnings

drivers/media/pci/ddbridge/ddbridge-maxs8.c:145:2-3: Unneeded semicolon
drivers/media/pci/ddbridge/ddbridge-maxs8.c:173:2-3: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

Fixes: a43dbe430fb4 ("media: ddbridge: support MaxLinear MXL5xx based cards (MaxS4/8)")

CC: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: isl6421: add checks for current overflow

This Kaffeine's BZ:
https://bugs.kde.org/show_bug.cgi?id=374693

affects SkyStar S2 PCI DVB-S/S2 rev 3.3 device. It could be due to
a Kernel bug.

While checking the Isil 6421, comparing with its manual, available at:

http://www.intersil.com/content/dam/Intersil/documents/isl6/isl6421a.pdf

It was noticed that, if the output load is highly capacitive, a different approach
is recomended when energizing the LNBf.

Also, it is possible to detect if a current overload is happening, by checking an
special flag.

Add support for it.

Tested on Skystar S2. Changes respect override_or option so should still work fine
on cx88 based cards which disable dynamic current limit.

Changes since v1:
v2 - fixed incorrect checking of i2c return values
v3 - fix if logic to check if dcl needs re-enabling
   - respect override_or values which aim to disable dcl
   - only do long sleep on overload if dcl enabled
   - add short sleep before re-enabling dcl
   - only check overload and potentially return EINVAL if device is on
v4 - revert v3 sleep logic changes to remove tuning delays

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jemma Denson <jdenson@gmail.com>

media: stv6111: return NULL instead of plain integer

Fixes:
  stv6111.c:665:24: warning: Using plain integer as NULL pointer

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: stv0910: declare global list_head stvlist static

Cleans up smatch warning:
symbol 'stvlist' was not declared. Should it be static?

Patch originally submitted by Colin Ian King <colin.king@canonical.com>,
remainder after the merge of all other stv0910 fixes.

Cc: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: rename RC_TYPE_* to RC_PROTO_* and RC_BIT_* to RC_PROTO_BIT_*

RC_TYPE is confusing and it's just the protocol. So rename it.

Suggested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cec: fix remote control passthrough

The 'Press and Hold' operation was not correctly implemented, in
particular the requirement that the repeat doesn't start until
the second identical keypress arrives. The REP_DELAY value also
had to be adjusted (see the comment in the code) to achieve the
desired behavior.

The 'enabled_protocols' field was also never set, fix that too. Since
CEC is a fixed protocol the driver has to set this field.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: per-protocol repeat period

CEC needs a keypress timeout of 550ms, which is too high for the IR
protocols. Also fill in known repeat times, with 50ms error margin.

Also, combine all protocol data into one structure.

Signed-off-by: Sean Young <sean@mess.org>
Suggested-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: saa7134: raw decoder can support any protocol

Any protocol for which we have a software decoder, can be enabled. Without
this only the loaded protocol decoders can be selected.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: ensure we do not read out of bounds

If rc_validate_filter() is called for CEC or XMP, then we would read
beyond the end of the array.

Suggested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: simplify ir_raw_event_store_edge()

Since commit 12749b198fa4 ("[media] rc: saa7134: add trailing space for
timely decoding"), the workaround of inserting reset events is no
longer needed.

Note that the initial reset is not needed either; other rc-core drivers
that don't use ir_raw_event_store_edge() never call this at all.

Verified on a HVR-1150 and Raspberry Pi.

Fixes: 3f5c4c73322e ("[media] rc: fix ghost keypresses with certain hw")

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: saa7134: add trailing space for timely decoding

The gpio-ir-recv driver adds timeouts which the saa7134 lacks; this
causes keypress not to arrive, and to only arrive once more IR is
received. This is what the commit below calls "ghost keypresses",
and that commit does not solve the issue completely.

This makes the IR on the HVR-1150 much more reliable and responsive.

Fixes: 3f5c4c73322e ("[media] rc: fix ghost keypresses with certain hw")

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc-core: improve ir_raw_store_edge() handling

The gpio-ir-recv driver does many wakeups (once per edge); the saa7134
driver has special handling to only wakeup 15ms after the first edge.
Make this part of rc-core so gpio-ir-recv also benefits from
this (so a rc-5 keypress now causes 3 wakeups rather than 24).

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: winbond-cir: buffer overrun during transmit

We're reading beyond the buffer before checking its length.

BUG: KASAN: slab-out-of-bounds in wbcir_irq_tx

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: mceusb: do not read data parameters unless required

This causes out-of-bounds read on device probe.

BUG: KASAN: slab-out-of-bounds in mceusb_dev_printdata+0xdc/0x830 [mceusb]

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: lirc_zilog: driver only sends LIRCCODE

This driver cannot send pulse, it only accepts driver-dependent codes.

Cc: <stable@vger.kernel.org> # v3.2
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: add zx-irdec remote control driver

It adds the remote control driver and corresponding keymap file for
IRDEC block found on ZTE ZX family SoCs.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: dt-bindings: add bindings document for zx-irdec

It adds the dt-bindings document for ZTE ZX IRDEC remote control
block.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: ir-nec-decoder: move scancode composing code into a shared function

The NEC scancode composing and protocol type detection in
ir_nec_decode() is generic enough to be a shared function.  Let's create
an inline function in rc-core.h, so that other remote control drivers
can reuse this function to save some code.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: sunxi-cir: explicitly request exclusive reset control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: st-rc: explicitly request exclusive reset control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: nuvoton: remove rudimentary transmit functionality

Transmit support in this driver was never tested and based on the code
it can't work. Just one example:
The buffer provided to nvt_tx_ir holds unsigned int values in
micro seconds: First value is for a pulse, second for a pause, etc.
Bytes in this buffer are copied as-is to the chip FIFO what can't work
as the chip-internal format is totally different. See also conversion
done in nvt_process_rx_ir_data.

Even if we would try to fix this we have the issue that we can't test
it. There seems to be no device on the market using IR transmit with
one of the chips supported by this driver.

To facilitate maintenance of the driver I'd propose to remove the
rudimentary transmit support.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: lirc_zilog: Clean up lirc zilog error codes

According the coding style guidelines, the ENOSYS error code must be
returned in case of a non existent system call. This code has been
replaced with the ENOTTY error code indicating a missing functionality.

Signed-off-by: Yves Lemée <yves.lemee.kernel@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: dt-bindings: gpio-ir-tx: add support for GPIO IR Transmitter

Document the device tree bindings for the GPIO IR Bit Banging
Transmitter.

Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: dt-bindings: pwm-ir-tx: Add support for PWM IR Transmitter

Document the device tree bindings for the PWM IR Transmitter.

Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: pwm-ir-tx: add new driver

This is new driver which uses pwm, so it is more power-efficient
than the bit banging gpio-ir-tx driver.

Signed-off-by: Sean Young <sean@mess.org>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Matthias Reichl <hias@horus.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: gpio-ir-tx: add new driver

This is a simple bit-banging GPIO IR TX driver.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Matthias Reichl <hias@horus.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: mce kbd decoder not needed for IR TX drivers

Without this patch, an input device is created which is not necessary.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc-core: rename input_name to device_name

When an ir-spi is registered, you get this message.

rc rc0: Unspecified device as /devices/platform/soc/3f215080.spi/spi_master/spi32766/spi32766.128/rc/rc0

"Unspecified device" refers to input_name, which makes no sense for IR
TX only devices. So, rename to device_name.

Also make driver_name const char* so that no casts are needed anywhere.

Now ir-spi reports:

rc rc0: IR SPI as /devices/platform/soc/3f215080.spi/spi_master/spi32766/spi32766.128/rc/rc0

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: constify attribute_group structures

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text    data     bss     dec     hex filename
  11605     880      20   12505    30d9 drivers/media/rc/rc-main.o

File size After adding 'const':
   text    data     bss     dec     hex filename
  11797     720      20   12537    30f9 drivers/media/rc/rc-main.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: imon: constify attribute_group structures

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text    data     bss     dec     hex filename
  18551    2256      77   20884    5194 drivers/media/rc/imon.o

File size After adding 'const':
   text    data     bss     dec     hex filename
  18679    2160      77   20916    51b4 drivers/media/rc/imon.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: sir_ir: remove unnecessary static in sir_interrupt()

Remove unnecessary static on local variable delt.
Such variable is initialized before being used,
on every execution path throughout the function.
The static has no benefit and, removing it reduces
the code size.

This issue was detected using Coccinelle and the following semantic patch:

@bad exists@
position p;
identifier x;
type T;
@@

static T x@p;
...
x = <+...x...+>

@@
identifier x;
expression e;
type T;
position p != bad.p;
@@

-static
 T x@p;
 ... when != x
     when strict
?x = e;

In the following log you can see the difference in the code size. Also,
there is a significant difference in the bss segment. This log is the
output of the size command, before and after the code change:

before:
   text    data     bss     dec     hex filename
   5009    3456     576    9041    2351 drivers/media/rc/sir_ir.o

after:
   text    data     bss     dec     hex filename
   4988    3400     512    8900    22c4 drivers/media/rc/sir_ir.o

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc-core: do not depend on MEDIA_SUPPORT

There is no dependency between the two, so remove the dependency in
Kconfig files.

Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: mtk-cir: add MAINTAINERS entry for MediaTek CIR driver

I work for MediaTek on maintaining the MediaTek CIR driver
for the existing SoCs and adding support for the following
SoCs.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: mtk-cir: add support for MediaTek MT7622 SoC

This patch adds driver for CIR controller on MT7622 SoC. It has similar
handling logic as the previously MT7623 does, but there are some
differences in the register and field definition. So for ease portability
and maintenance, those differences all are being kept inside the platform
data as other drivers usually do. Currently testing successfully on NEC
and SONY remote controller.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc: mtk-cir: add platform data to adapt into various hardware

This patch is the preparation patch in order to adapt into various
hardware through adding platform data which holds specific characteristics
and differences among MediaTek supported CIR devices instead of the old
way defining those data in the static way as macro has. And the existing
logic would be slightly changed to operate on those data which the actual
device depends on.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: dt-bindings: media: mtk-cir: Add support for MT7622 SoC

Document the devicetree bindings for CIR on MediaTek MT7622
SoC.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: rc-core: consistent use of rc_repeat()

The NEC decoder and the Sanyo decoders check if dev->keypressed is true
before calling rc_repeat (without holding dev->keylock).

Meanwhile, the XMP and JVC decoders do no such checks.

This patch makes sure all users of rc_repeat() do so consistently by
removing extra checks in NEC/Sanyo and modifying the check a bit in
rc_repeat() so that no input event is generated if the key isn't pressed.

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Allow entities to participate in the partition algorithm

The configuration of the pipeline and entities directly affects the
inputs required to each entity for the partition algorithm. Thus it
makes sense to involve those entities in the decision making process.

Extend the entity ops API to provide an optional .partition() operation.
This allows entities that affect the partition window to adapt the
window based on their configuration.

Entities implementing this operation must update the window parameter in
place, which will then be passed up the pipeline. This creates a process
whereby each entity describes what is required to satisfy the required
output to its predecessor in the pipeline.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Provide UDS register updates

Provide register definitions required for UDS phase and partition
algorithm support. The registers and bits defined here are available on
Gen3 hardware only.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Move partition rectangles to struct and operate directly

As we develop the partition algorithm, we need to store more information
per partition to describe the phase and other parameters.

To keep this data together, further abstract the existing v4l2_rect
into a partition specific structure. As partitions only have horizontal
coordinates, store the left and width values only.

When generating the partition windows, operate directly on the partition
struct rather than copying and duplicating the processed data

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Remove redundant context variables

The vsp1_pipe object context variables for div_size and
current_partition allowed state to be maintained through processing the
partitions during processing.

Now that the partition tables are calculated during stream on, there is
no requirement to store these variables in the pipe object.

Utilise local variables for the processing as required.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Calculate partition sizes at stream start

Previously the active window and partition sizes for each partition were
calculated for each partition every frame. This data is constant and
only needs to be calculated once at the start of the stream.

Extend the vsp1_pipe object to dynamically store the number of partitions
required and pre-calculate the partition sizes into this table.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Move vsp1_video_pipeline_setup_partitions() function

Separate the code change from the function move so that code changes can
be clearly identified. This commit has no functional change.

The partition algorithm functions will be changed, and
vsp1_video_pipeline_setup_partitions() will call vsp1_video_partition().
To prepare for that, move the function without any code change.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: vsp1: Release buffers in start_streaming error path

Presently any received buffers are only released back to vb2 if
vsp1_video_stop_streaming() is called. If vsp1_video_start_streaming()
encounters an error, we will be warned by the vb2 handlers that buffers
have not been returned.

Move the buffer cleanup code to its own function to prevent duplication
and call from both vsp1_video_stop_streaming() and the error path in
vsp1_video_start_streaming().

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ov13858: Limit vblank to permissible range

Previously, vblank range given to user was too big, falling outside
of permissible range for a given resolution. Sometimes, too low vblank
resulted in errors.

Now, limit vblank to only permissible range for a given resolution.
This change limits lower-bounds of vblank, doesn't affect upper bounds.

Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ov5670: Limit vblank to permissible range

Previously, vblank range given to user was too big, falling outside
of permissible range for a given resolution. Sometimes, too low vblank
resulted in errors.

Now, limit vblank to only permissible range for a given resolution.
This change limits lower-bounds of vblank, doesn't affect upper bounds.

Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: et8ek8: Decrease stack usage

The et8ek8 driver combines I²C register writes to a single array that it
passes to i2c_transfer(). The maximum number of writes is 48 at once,
decrease it to 8 and make more transfers if needed.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: mt9m111: constify video_subdev structures

The v4l2_subdev_ops structure is only passed as the third argument
of v4l2_i2c_subdev_init, which is const, so the v4l2_subdev_ops
structure can be const as well.  The other structures are only
stored in the v4l2_subdev_ops structure, all the fields of which are
const, so these structures can also be const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l: mt9t001: constify video_subdev structures

The v4l2_subdev_ops structure is only passed as the third argument of
v4l2_i2c_subdev_init, which is const, so the v4l2_subdev_ops structure
can be const as well.  The other structures are only stored in the
v4l2_subdev_ops structure, all the fields of which are const, so these
structures can also be const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ov5670: Fix incorrect frame timing reported to user

Previously, pixel-rate/(pixels-per-line * lines-per-frame) was
yielding incorrect frame timing for the user.

OV sensor is using internal timing and this requires
conversion (internal timing -> PPL) for correct HBLANK calculation.

Now, change pixels-per-line domain from internal sensor clock to
pixels domain. Set HBLANK read-only because fixed PPL is used for all
resolutions. And, use more accurate link-frequency 422.4MHz instead of
rounding down to 420MHz.

Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: usb: rainshadow-cec: constify serio_device_id

serio_device_id are not supposed to change at runtime. All functions
working with serio_device_id provided by <linux/serio.h> work with
const serio_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: usb: pulse8-cec: constify serio_device_id

serio_device_id are not supposed to change at runtime. All functions
working with serio_device_id provided by <linux/serio.h> work with
const serio_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: coda/imx-vdoa: Check for platform_get_resource() error

platform_get_resource() may fail and in this case a NULL dereference
will occur.

Prevent this from happening by returning an error on
platform_get_resource() failure.

Fixes: b0444f18e0b18abce ("[media] coda: add i.MX6 VDOA driver")

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ivtv: Fix incompatible type for argument error

The first argument of function snd_ctl_new1 is of type const struct
snd_kcontrol_new * but in this file the variable is passed by value
to this function. This generated ""incompatible type for argument"
error. So, pass the variable by reference.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cx18: Fix incompatible type for argument error

The first argument of function snd_ctl_new1 is of type const struct
snd_kcontrol_new * but in this file the variable is passed by value to
this function.
This generated ""incompatible type for argument" error. So, pass the
variable by reference.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: solo6x10: make snd_kcontrol_new const

Make this const as it is only used during a copy operation.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cx88: make snd_kcontrol_new const

Make this const as it only passed as the 1st argument to the function
snd_ctl_new1, which is of type const.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: radio: constify pnp_device_id

pnp_device_id are not supposed to change at runtime. All functions
working with pnp_device_id provided by <linux/pnp.h> work with
const pnp_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: davinci: constify platform_device_id

platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: coda: constify platform_device_id

platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: staging: bcm2835-audio: make snd_pcm_hardware const

Make these const as they are only used during a copy operation.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: mtk-mdp: use IS_ERR to check return value of of_clk_get

Function of_clk_get() returns an ERR_PTR on failures. In file
mtk_mdp_commp.c, its return value is checked against NULL. Such checks
cannot prevent from accessing bad memory. This patch replaces the NULL
checks with IS_ERR checks.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: Convert to using %pOF instead of full_name

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Songjun Wu <songjun.wu@microchip.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
Cc: Houlong Wei <houlong.wei@mediatek.com>
Cc: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Hyun Kwon <hyun.kwon@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: omap3isp: Quit using struct v4l2_subdev.host_priv field

struct v4l2_subdev.host_priv is intended to be used by another driver. This
is hardly good design but back in the days of platform data was a quick
hack to get things done.

As the sub-device specific bus information can be stored to the ISP driver
specific struct allocated along with v4l2_async_subdev, keep the
information there and only there.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: omap3isp: csiphy: Don't assume the CSI receiver is a CSI2 module

The CSI PHY is associated with a CSI receiver. The code assumes this
receiver is a CSI2 module and relies on the CSI2 module object heavily to
access the ISP or pipeline objects. However, the receiver could also be a
CSI1/CCP2 module.

Pass a new CSI receiver entity pointer to the CSI PHY acquire function, and
replace all hardcoded usage of the CSI2 module with that CSI receiver
entity.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: omap3isp: Always initialise isp and mutex for csiphy1

The PHY is still relevant for CCP2.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: omap3isp: Correctly set IO_OUT_SEL and VP_CLK_POL for CCP2 mode

ISP CSI1 module needs all the bits correctly set to work.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: omap3isp: Parse CSI1 configuration from the device tree

Add support for parsing CSI1 configuration.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cec-pin: fix irq handling

The free_irq() function could be called from interrupt context,
which is invalid. Move this to the thread.

In the interrupt handler we just request that the thread disables
the irq. This is done through an atomic so we don't need to add
any spinlocks.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cec: rename pin events/function

The CEC_EVENT_PIN_LOW/HIGH defines and the cec_queue_pin_event() function
did not specify that these were about CEC pin events.

Since in the future there will also be HPD pin events it is wise to rename
the event defines and function to CEC_EVENT_PIN_CEC_LOW/HIGH and
cec_queue_pin_cec_event() now before these become part of the ABI.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: s5p-cec: use CEC_CAP_DEFAULTS

Use the new CEC_CAP_DEFAULTS define in the s5p-cec driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l2-compat-ioctl32.c: add capabilities field to, v4l2_input32

The v4l2_input32 struct wasn't updated when this field was added.
It didn't cause a failure in the compat code, but it is better to
keep it in sync with v4l2_input to avoid confusion.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: v4l2-ctrls.h: better document the arguments for v4l2_ctrl_fill

The arguments for this function are pointers. Make it clear at
its documentation.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: uvcvideo: Constify video_subdev structures

uvc_subdev_ops is only passed as the second argument of
v4l2_subdev_init, which is const, so uvc_subdev_ops can be
const as well.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: uvcvideo: Convert from using an atomic variable to a reference count

When adding support for metadata nodes, we'll have to keep video
devices registered until all metadata nodes are closed too. Since
this has nothing to do with stream counting, replace the nstreams
atomic variable with a reference counter.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: uvcvideo: Fix .queue_setup() to check the number of planes

According to documentation of struct vb2_ops the .queue_setup() callback
should return an error if the number of planes parameter contains an
invalid value on input. Fix this instead of ignoring the value.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: uvcvideo: Prevent heap overflow when accessing mapped controls

The size of uvc_control_mapping is user controlled leading to a
potential heap overflow in the uvc driver. This adds a check to verify
the user provided size fits within the bounds of the defined buffer
size.

Originally-from: Richard Simmons <rssimmo@amazon.com>

Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: uvcvideo: Fix incorrect timeout for Get Request

Section 9.2.6.4 of USB 2.0/3.x specification describes that
"device must be able to return the first data packet to host within
500 ms of receipt of the request. For subsequent data packet, if any,
the device must be able to return them within 500 ms".

This is to fix incorrect timeout and change it from 300 ms to 500 ms
to meet the timing specified by specification for Get Request.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: zr364xx: constify videobuf_queue_ops structures

These videobuf_queue_ops structures are only passed as the second
argument to videobuf_queue_vmalloc_init, which is declared as const.
Thus the videobuf_queue_ops structures themselves can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct videobuf_queue_ops i@p = { ... };

@ok1@
identifier r.i;
expression e1;
position p;
@@
videobuf_queue_vmalloc_init(e1,&i@p,...)

@bad@
position p != {r.p,ok1.p};
identifier r.i;
struct videobuf_queue_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct videobuf_queue_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: tm6000: constify videobuf_queue_ops structures

These videobuf_queue_ops structures are only passed as the second
argument to videobuf_queue_vmalloc_init, which is declared as const.
Thus the videobuf_queue_ops structures themselves can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct videobuf_queue_ops i@p = { ... };

@ok1@
identifier r.i;
expression e1;
position p;
@@
videobuf_queue_vmalloc_init(e1,&i@p,...)

@bad@
position p != {r.p,ok1.p};
identifier r.i;
struct videobuf_queue_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct videobuf_queue_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: cx231xx: constify videobuf_queue_ops structures

These videobuf_queue_ops structures are only passed as the second
argument to videobuf_queue_vmalloc_init, which is declared as const.
Thus the videobuf_queue_ops structures themselves can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct videobuf_queue_ops i@p = { ... };

@ok1@
identifier r.i;
expression e1;
position p;
@@
videobuf_queue_vmalloc_init(e1,&i@p,...)

@bad@
position p != {r.p,ok1.p};
identifier r.i;
struct videobuf_queue_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct videobuf_queue_ops i = { ... };
// </smpl>

In the first case, there is a second commented call to
videobuf_queue_sg_init with the structure as the second argument.  If that
code will be uncommented, the const will remain correct, because the second
parameter of that function is also const.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>