The uvcvideo webcam driver exposes the v4l2 control "Exposure (Absolute)"
which allows the user to control the exposure time of the webcam,
essentially controlling the brightness of the received image.  By default
the webcam automatically adjusts the exposure time automatically but the
if you set the control "Exposure, Auto"="Manual Mode" the user can fix
the exposure time.

Unfortunately it seems that the Logitech C920 has a firmware bug where
it will forget that it's in manual mode temporarily during initialisation.
This means that the camera doesn't respect the exposure time that the user
requested if they request it before starting to stream video.  They end up
with a video stream which is either too bright or too dark and must reset
the controls after video starts streaming.

This patch introduces the quirk UVC_QUIRK_RESTORE_CTRLS_ON_INIT which
causes the cached controls to be re-uploaded to the camera immediately
after initialising the camera.  This quirk is applied to the C920 to work
around this camera bug.
Signed-off-by: NWilliam Manley <will@williammanley.net>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Map V4L2_CID_TILT_SPEED and V4L2_CID_PAN_SPEED to the standard UVC
CT_PANTILT_RELATIVE_CONTROL terminal control request.

Tested by plugging a Logitech ConferenceCam C3000e USB camera
and controlling pan/tilt from the userspace using the VIDIOC_S_CTRL ioctl.
Verified that it can pan and tilt at the same time in both directions.
Signed-off-by: NVincent Palatin <vpalatin@chromium.org>
Reviewed-by: NPawel Osciak <posciak@chromium.org>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Used tda18212 tuner is implemented as a I2C driver. Use em28xx
tuner I2C client for tda18212 driver.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Used tda18212 tuner is implemented as I2C driver. Implement I2C
client to anysee and use it for tda18212.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

It crash kernel when device was removed while it was streaming.
That is because we removed driver and frontend thread was still
running. Use new callback which allows I2C driver removal just
after frontend is unregistered.

V2: fixed by reported by Daniel
Reported-by: NDaniel Glöckner <daniel-gl@gmx.net>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Add tuner_detach callback in order to allow custom detach. It is
needed when tuner driver is implemented I2C client or some other
kernel bus, but not proprietary dvb_attach / dvb_detach.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Add frontend_detach callback in order to allow custom detach. It is
needed when demod driver is implemented I2C client or some other
kernel bus, but not proprietary dvb_attach / dvb_detach.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Use device names for recent PCTV Systems devices:
PCTV AndroiDTV (78e)
PCTV microStick (79e)
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

I2C driver address is passed as a i2c_new_device() parameter when
device is created. Thus no need to keep it in config struct.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Biggest problem of that function is complexity. Try reduce complexity:

* define macros to detect all 3 supported xfers
* remove duplicate message maximum size checks
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Convert driver to kernel I2C model.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Re-implement sleep. Based USB sniffs taken from the latest Hauppauge
windows driver version 07/10/2014, 14.6.23.32191.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Change the it913x driver to use the I2C high lever tuner
binding model. As af9035 depends on it, add a code there
to do the binding.

[mchehab@osg.samsung.com: Merge 3 patches into one, because
 we don't want to break bisect due to the conversion]
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Remove tuner_ prefix from module name and file names. Prefix was
added due to file name conflict on media out-tree build system.
Demodulator having same name does not exists anymore. So lets
remove dumb prefix.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Correct issues reported by checkpatch.pl.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Reverts commit 3ab25123
[media] af9035: override tuner for AVerMedia A835B devices

Original commit itself is correct, but it was replaced by more
general solution (commit 1cbbf90d).
This old solution was committed by a accident and is not needed
anymore.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Integrated RF tuner of IT9135 is connected to demod clock source
named dyn0_clk. Enable that clock source in order to provide stable
clock early enough.

Cc: Bimow Chen <Bimow.Chen@ite.com.tw>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

There is no need to init flags before calling spin_lock_irqsave().
spin_lock_irqsave is macro which stores value to 'flags'.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Kernel logging system needs pointer to usb interface device in
order to print names and bus numbers properly. There was wrong
device pointer given and log printings wasn't correct.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Sample rate calculation gives a little bit too large results because
in real life there was around one milliseconds (~one usb packet) too
much data for given time. Calculate time more accurate in order to
provide better results.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

There is no need to init flags before calling spin_lock_irqsave().
spin_lock_irqsave is a macro which stores value to 'flags'.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Kernel logging system needs pointer to usb interface device in
order to print names and bus numbers properly. There was wrong
device pointer given and log printings wasn't correct.

Remove some debug logging from v4l2 ioctl functions. v4l2 core debug
prints almost same information when enabled.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Fix issues reported by checkpatch.pl.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Free all reserved USB buffers and URBs on failure. Return all queued
buffers to vb2 with state queued on error case.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Signed-off-by: NAntonio Ospite <ao2@ao2.it>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Fix indentation of a comment, put it on the same level of the code it
refers to.
Signed-off-by: NAntonio Ospite <ao2@ao2.it>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

add the following IDs
USB_PID_PCTV_78E (0x025a) for PCTV 78e
USB_PID_PCTV_79E (0x0262) for PCTV 79e

For these it9135 devices.
Signed-off-by: NMalcolm Priestley <tvboxspy@gmail.com>
Cc: Antti Palosaari <crope@iki.fi>
Cc: <stable@vger.kernel.org> # v3.14+
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Instead of allocating a var to store 0 and just return it,
change the code to return 0 directly.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Instead of using if (foo == false), just use
if (!foo).

That allows a faster mental parsing when analyzing the
code.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Instead of using 0 or 1 for boolean, use the true/false
defines.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Instead of using 0 or 1 for boolean, use the true/false
defines.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Instead of using 0 or 1 for boolean, use the true/false
defines.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Instead of using 0 or 1 for boolean, use the true/false
defines.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/em28xx/em28xx-core.c:297:16: warning: cast to restricted __le16
drivers/media/usb/em28xx/em28xx-cards.c:2249:20: warning: symbol 'em28xx_bcount' was not declared. Should it be static?
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/dvb-usb/cxusb.c:178:40: warning: restricted __le16 degrades to integer
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/cx231xx/cx231xx-avcore.c:2226:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2447:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2475:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2500:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2647:18: warning: incorrect type in assignment (different base types)
drivers/media/usb/cx231xx/cx231xx-avcore.c:2659:21: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-dvb.c:743:57: warning: Using plain integer as NULL pointer
drivers/media/usb/cx231xx/cx231xx-dvb.c:776:57: warning: Using plain integer as NULL pointer
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/pwc/pwc-v4l.c:55:12: warning: symbol 'pwc_auto_whitebal_qmenu' was not declared. Should it be static?
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:24:5: warning: symbol 'dvb_usbv2_disable_rc_polling' was not declared. Should it be static?
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/s2255/s2255drv.c:2248:20: warning: cast to restricted __le16

At the USB structs there are two different idProduct:
	usb_device_id::idProduct - already on CPU endiannes
	usb_device::descriptor.idProduct - with is LE16

In this specific case, the driver checks for the one at usb_device_id
struct, with already have CPU endianness. So, no conversion is required.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/usbtv/usbtv-video.c:285:14: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:285:14: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:285:14: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:285:14: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:285:14: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:285:14: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:287:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:287:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:287:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:287:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:287:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:287:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:288:15: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:288:15: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:288:15: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:288:15: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:288:15: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:288:15: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:289:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:289:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:289:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:289:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:289:20: warning: cast to restricted __be32
drivers/media/usb/usbtv/usbtv-video.c:289:20: warning: cast to restricted __be32
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>