There's a dead code on usbvision that makes it harder to read
and produces a smatch warning about bad identation.

Improve the code readability and add a FIXME to warn about
the current hack there.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The current definition is weird, and produce lots of sparse
warnings:

	drivers/media/i2c/cx25840/cx25840-ir.c:448 txclk_tx_s_max_pulse_width() warn: impossible condition '(ns > 4294967295) => (0-u32max > u32max)'
	drivers/media/i2c/cx25840/cx25840-ir.c:461 rxclk_rx_s_max_pulse_width() warn: impossible condition '(ns > 4294967295) => (0-u32max > u32max)'
	drivers/media/i2c/cx25840/cx25840-ir.c:706 cx25840_ir_rx_read() warn: impossible condition '(v > 4294967295) => (0-u32max > u32max)'
	drivers/media/pci/ivtv/ivtv-queue.c:145 ivtv_queue_move() error: we previously assumed 'steal' could be null (see line 138)
	drivers/media/rc/streamzap.c:155 sz_push_full_pulse() warn: impossible condition '(rawir.duration > 4294967295) => (0-u32max > u32max)'
	drivers/media/rc/streamzap.c:169 sz_push_full_pulse() warn: impossible condition '(rawir.duration > 4294967295) => (0-u32max > u32max)'
	drivers/media/rc/redrat3.c:325 redrat3_us_to_len() warn: impossible condition '(microsec > 4294967295) => (0-u32max > u32max)'
	drivers/media/rc/redrat3.c:383 redrat3_process_ir_data() warn: impossible condition '(rawir.duration > 4294967295) => (0-u32max > u32max)'
	drivers/media/usb/pvrusb2/pvrusb2-hdw.c:3676 pvr2_send_request_ex() error: we previously assumed 'write_data' could be null (see line 3648)
	drivers/media/usb/pvrusb2/pvrusb2-hdw.c:3829 pvr2_send_request_ex() error: we previously assumed 'read_data' could be null (see line 3649)
	drivers/media/pci/cx23885/cx23888-ir.c:463 txclk_tx_s_max_pulse_width() warn: impossible condition '(ns > 4294967295) => (0-u32max > u32max)'
	drivers/media/pci/cx23885/cx23888-ir.c:476 rxclk_rx_s_max_pulse_width() warn: impossible condition '(ns > 4294967295) => (0-u32max > u32max)'
	drivers/media/pci/cx23885/cx23888-ir.c:696 cx23888_ir_rx_read() warn: impossible condition '(v > 4294967295) => (0-u32max > u32max)'

Use a more realistic value for it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Don't assume that IR_MAX_DURATION is a bitmask. It isn't.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Smatch reports a warning:
	drivers/media/usb/tm6000/tm6000-video.c:646 tm6000_prepare_isoc() error: we previously assumed 'dev->urb_buffer' could be null (see line 624)

This is not really a problem, but it actually shows that the check
if urb_buffer is NULL is being done twice: at the if and at
tm6000_alloc_urb_buffers().

We don't need to do it twice. So, remove the extra check. The code
become cleaner, and, as a collateral effect, smatch becomes happy.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Smatch currently produces two warnings:
	drivers/media/pci/ivtv/ivtv-fileops.c:901 ivtv_v4l2_close() warn: suspicious bitop condition
	drivers/media/pci/ivtv/ivtv-fileops.c:1026 ivtv_open() warn: suspicious bitop condition

Those are false positives, but it is not hard to get rid of them by
using a different way to evaluate the macro, splitting the logical
boolean evaluation from the bitmap one.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As reported by smatch:
	drivers/media/pci/bt8xx/dst_ca.c:323 ca_get_message() warn: this array is probably non-NULL. 'p_ca_message->msg'
	drivers/media/pci/bt8xx/dst_ca.c:498 ca_send_message() warn: this array is probably non-NULL. 'p_ca_message->msg'

Those two checks are needless/useless, as the ca_msg struct is
declared as:
typedef struct ca_msg {
        unsigned int index;
        unsigned int type;
        unsigned int length;
        unsigned char msg[256];
} ca_msg_t;

So, if the p_ca_message pointer is not null, msg will also be
not null.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As reported by smatch:
	drivers/media/dvb-frontends/dib0090.c:1710 dib0090_dc_offset_calibration() warn: missing break? reassigning '*tune_state'

There's no need to change tune_state there, as the fall though code
will change it again to another state. So, simplify it by
removing the dead code.

While here, fix a typo:
	Sart => Start
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Smatch reports two issues:
	drivers/media/platform/sh_vou.c:670 vou_adjust_output() error: buffer overflow 'vou_scale_v_num' 3 <= 4
	drivers/media/platform/sh_vou.c:670 vou_adjust_output() error: buffer overflow 'vou_scale_v_den' 3 <= 4

It seems that there's actually a bug here: the same var (idx) is used
as an index for vertical and horizontal scaling arrays. However,
there are 4 elements on the h arrays, and only 3 at the v ones.

On the first loop, it may select index 4 for the horizontal array.

In this case, if the second loop fails to select an index, the
code would keep using 4 for the vertical array, with is past of
the array sizes.

The intent here seems to use index 0, if the scale is not found.

So, use a separate var for the vertical index.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As reported by smatch:
	drivers/media/usb/em28xx/em28xx-video.c:842 get_ressource() info: ignoring unreachable code.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As reported by smatch:
	drivers/media/dvb-frontends/drxk_hard.c:3277 dvbt_sc_command() warn: missing break? reassigning 'status'

This is basically because the error handling logic there was crappy.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Remove the following compilation warnings:

	drivers/media/platform/vivid/vivid-tpg.c: In function 'tpg_gen_text':
	drivers/media/platform/vivid/vivid-tpg.c:1562:1: warning: the frame size of 1308 bytes is larger than 1024 bytes [-Wframe-larger-than=]
	 }
	 ^

This seems to be due to some bad optimization done by gcc.

Moving the for() loop to happen inside the macro solves the
issue.

While here, fix CodingStyle at the switch().
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>

Commits a0f10c13 and
6c9fe765 ("media: s5p-mfc: fix broken
pointer cast on 64bit arch") fixed issue with lossy cast on 64-bit
architectures. However it also removed __iomem attribute from that cast.
This leads to sparse warnings. This patch fixes those warnings by adding
__iomem cast in case of v6+ code version and replacing readl/writel by
simple u32 load/store operations in case of v5 code (which is called on
system memory allocated by dma_alloc_coherent() instead of io registers).
Reported-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

this patch makes use of helper function v4l2_get_timestamp()
to set the timestamp of vb2 buffer.
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

V4L2 drivers should use MONOTONIC timestamps instead of gettimeofday,
which is affected by daylight savings time.
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

this patch sets nbuffers to three or more and drops the
unset member video_limit which just a copy paste from
earlier driver.
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

clear of the output_specs before passing it to the
configure_resizer_out_params(), so that no garbage values
are set.

This fixes following build warning:
drivers/staging/media/davinci_vpfe/dm365_resizer.c: In function 'resizer_set_stream':
drivers/staging/media/davinci_vpfe/dm365_resizer.c:190:46: warning: 'output_specs.vst_c'
may be used uninitialized in this function [-Wmaybe-uninitialized]
  param->ext_mem_param[index].rsz_sdr_ptr_s_c = output->vst_c;
                                              ^
drivers/staging/media/davinci_vpfe/dm365_resizer.c:316:30: note: 'output_specs.vst_c' was declared here
  struct vpfe_rsz_output_spec output_specs;
                              ^
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Implement DVBv5 signal strength stats. Returns dBm.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Tested-by: NAdam Baker <linux@baker-net.org.uk>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

We need own I2C locking because of tuner I2C adapter/repeater.
Firmware command is executed using I2C send + reply message. Default
I2C adapter locking protects only single I2C operation, not whole
send + reply sequence as needed. Due to that, it was possible tuner
I2C message interrupts firmware command sequence.
Reported-by: NAdam Baker <linux@baker-net.org.uk>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Reviewed-by: NAdam Baker <linux@baker-net.org.uk>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

FE_SET_PROPERTY/FE_GET_PROPERTY actually expects a struct dtv_properties
argument.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The changeset dc9ef7d1 change the open() ioctl documentation to
match the V4L2 open(). However, some cut-and-pasted stuff doesn't
match what actually happens at the DVB core.

So, fix the documentation entry to be more accurate with the DVB
frontend open() specifics.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

To fix the last xmllint errors the open and close function reference
description was rewritten based on the v4l2 open and close functions.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Fixes a large number of xmllint errors.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

satellital -> satellite
antena -> antenna
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The UVC_DEV_DISCONNECTED flag is set when the USB device is
disconnected, and checked in the open() handler to refuse opening a
device that has been disconnected.

This is inherently racy, but the race condition is taken care of in the
V4L2 core, which also fails open() calls when the V4L2 device node has
been unregistered. As the uvcvideo USB disconnect handler unregisters
all its video device nodes, the UVC_DEV_DISCONNECTED flag doesn't serve
any purpose anymore and can be removed.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The "TOSHIBA Web Camera - 5M" Chicony device (04f2:b50b) seems to
compute the bandwidth on 16 bits and erroneously sign-extend it to
32 bits, resulting in a huge bandwidth value. Detect and fix that
condition by setting the 16 MSBs to 0 when they're all equal to 1.
Reported-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Now that videobuf2-vmalloc supports exporting buffers, add support for
the DMABUF exporter role by plugging in the videobuf2 ioctl helper.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

It is AF9035 + MxL5007T.
Driver reports:
prechip_version=00 chip_version=03 chip_type=3802

Not sure if that USB ID is reserved only for HP brand or if it is
common, but the stick I have is branded as HP part no. 580715-001
rmn A867.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Implement I2C client device binding.
Wrap media attach to driver I2C probe.
Add wrapper from m88ds3103_attach() to m88ds3103_probe() via driver
core in order to provide proper I2C client for legacy media attach
binding.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Use jiffies to set timeout for DiSEqC TX ready polling. Using jiffies
is more elegant solution than looping N times with sleep.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Implement DVBv5 BER statistics.
Wrap legacy DVBv3 BER to DVBv5 BER.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Implement DVBv5 CNR statistics.
Wrap legacy DVBv3 SNR to DVBv5 CNR.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Do not return error from get_frontend() when status is queried, but
the frontend didn't lock yet. The proper behavior is to only update the
cache after having a lock.

[mchehab@osg.samsung.com: fix the patch description]
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Autogain algorithm is very simple, if average luminance is low - increase gain,
if it's high - decrease gain. Gain granularity is low enough for this algo to
stabilize quickly.
Signed-off-by: NVasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

This cam seems to return different values on long commands, so make status check
in sn9c2028_long_command() more tolerant. Anyway, read value isn't used anywhere
later.
Signed-off-by: NVasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The GPIO subsystem provides dummy GPIO consumer functions if GPIOLIB is
not enabled. Hence drivers that depend on GPIOLIB, but use GPIO consumer
functionality only, can still be compiled if GPIOLIB is not enabled.

Relax the dependency on GPIOLIB if COMPILE_TEST is enabled, where
appropriate.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

When stop_streaming is called while a frame is currently being retrieved, the
buffer being filled will still be returned with BUF_STATE_DONE. By resetting
the sequence number and checking before returning the buffer, it can now
correctly be returned with BUF_STATE_ERROR.
Signed-off-by: NMartin Kaltenbrunner <modin@yuri.at>
Signed-off-by: NFlorian Echtler <floe@butterbrot.org>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Add dev_dbg statements for easier future debugging; also change the warning
about packet ID mismatches to debug output to avoid flooding the logs. This
warning is only important in a very specific/rare use case when trying to
correlate input events with video data.
Signed-off-by: NMartin Kaltenbrunner <modin@yuri.at>
Signed-off-by: NFlorian Echtler <floe@butterbrot.org>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Add missing functions to query the single fixed frame size (960x540) and
supported frame rates. Technically, the SUR40 supports any arbitrary frame
rate up to 60 FPS, as it is polled and not interrupt-driven. For now, we
just report 30 and 60 FPS, which is sufficient to make most V4L2 tools work.
Signed-off-by: NMartin Kaltenbrunner <modin@yuri.at>
Signed-off-by: NFlorian Echtler <floe@butterbrot.org>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The SUR40 hardware can deliver images at up to 60 FPS; at full USB2 bandwidth,
one raw frame will take about 11 ms to transmit. If the poll interval is above
5 ms, fully handling one frame will take longer than 16 ms and the overall
frame rate will drop below 60 FPS. To get the full frame rate without blocking
all the time and still allowing for a bit of timing jitter, we reduce the poll
interval to 4 ms.
Signed-off-by: NMartin Kaltenbrunner <modin@yuri.at>
Signed-off-by: NFlorian Echtler <floe@butterbrot.org>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

U8 and U16LE format human readable names were translated with string
containing emulated word. These strings were taken from msi2500 driver,
where those formats were emulated (after module parameter is set). But
on API correct names should be used, without any special case notes.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>