In the function configure_geometry(), we will setup the ISI CFG2
according to the sensor output format.

It make no sense to just read back the CFG2 register and just set part
of it.

So just set up this register directly makes things simpler.
Currently only support YUV format from camera sensor.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

If ISI is working on a 1024x768 or higher resolution, it needs longer
time to disable ISI. So this patch will increase timeout to 500ms.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

If CONFIG_PM=n:

    drivers/media/platform/soc_camera/atmel-isi.c:1044: warning: 'atmel_isi_runtime_suspend' defined but not used
    drivers/media/platform/soc_camera/atmel-isi.c:1054: warning: 'atmel_isi_runtime_resume' defined but not used

Protect the unused functions by #ifdef CONFIG_PM to fix this.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Hans Verkuil says: "The only place querystd can be called  is in the QUERYSTD
ioctl, all other ioctls should use the last set standard." So call the g_std()
subdevice method instead of querystd() in the driver's set_fmt() method.
Reported-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

rcar_vin_set_fmt() defaults to  PAL when the subdevice's querystd() method call
fails (e.g. due to I2C error).  This doesn't work very well when a camera being
used  outputs NTSC which has different order of fields and resolution.  Let  us
stop  pretending and return the actual error except  when the querystd() method
is not implemented,  in which case  we'll have  to set the 'field' variable  to
V4L2_FIELD_NONE.

Note that doing this would prevent video capture on at least Renesas Henninger/
Porter boards where I2C seems particularly buggy.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Since commit a483dcbf ("ARM: shmobile: lager: Remove legacy
board support"), R-Car Gen2 SoCs are only supported in generic DT-only
ARM multi-platform builds.  The driver doesn't need to match platform
devices by name anymore, hence remove the corresponding
platform_device_id entry.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Since in soc_of_bind() it may use the of node's full name as the clk_name,
and this full name may be longer than 32 characters, take at91 i2c sensor
as an example, length is 34 bytes:
   /ahb/apb/i2c@f8028000/camera@0x30

So this patch increase the clk_name[] array size to 64. It seems big
enough so far.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

In videobuf_setup reject buffers that are too small for the configured
format. Fixes v4l2-compliance issue.
Signed-off-by: NRob Taylor <rob.taylor@codethink.co.uk>
Reviewed-by: NWilliam Towle <william.towle@codethink.co.uk>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Adapt rcar_vin_querycap() so that cap->bus_info is populated with
something meaningful/unique.
Signed-off-by: NRob Taylor <rob.taylor@codethink.co.uk>
Signed-off-by: NWilliam Towle <william.towle@codethink.co.uk>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

This adds V4L2_MBUS_FMT_RGB888_1X24 input format support
which is used by the ADV7612 chip.

Modified to use MEDIA_BUS_FMT_* constants
Signed-off-by: NKoji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NYoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: NWilliam Towle <william.towle@codethink.co.uk>
Reviewed-by: NRob Taylor <rob.taylor@codethink.co.uk>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Always release the queue if the owner closes its filehandle and not when
it is the last open filehandle.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

If streamoff returned an error, then pass that on to the caller.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

- REQBUFS(0) will stop streaming, free buffers and release the file ownership.
- Return ENOTTY for create_bufs for a vb1 driver
- Return EBUSY if there is a different streaming owner and set the new owner on
  success.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

- For vb1 drivers just return -ENOTTY.
- For vb2 drivers allow vb2_expbuf without there being a stream owner:
  the vb2_expbuf function will return the correct error message in that case.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Fill in the std field from the video_device tvnorms field.

This fixes a v4l2-compliance failure.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NRob Taylor <rob.taylor@codethink.co.uk>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Make sure that 'field' isn't FIELD_ANY when the driver is
first loaded. Fixes a v4l2-compliance failure.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Fill in the bus_info and driver fields. Found by v4l2-compliance.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The master clock should be handled by sensor itself.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The runtime pm resume/suspend will enable/disable pclk (ISI peripheral
clock).

We have to call runtime_pm_get_sync()/runtime_pm_put() when we need to
access ISI registers. In atmel_isi_probe(), remove the isi disable code
as at that moment ISI peripheral clock is not enable yet.

Besides, clock_start()/clock_stop() is used to control the mclk, not
the ISI peripheral clock. So move this to start[stop]_streaming()
function.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

In current code, stop_streaming() will just return if ISI is still
working in the codec. But this is incorrect, we need to disable ISI even
it is working on the codec, otherwise stop_streaming() will not work as
we expected.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Even though the rcar-vin driver tells userspace that it will give a monotonic
timestamp, it is actually using gettimeofday. Replace this with a proper
monotonic timestamp.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

[mchehab@osg.samsung.com: fix a merge conflict at adv7604.c]
Signed-off-by: NFabian Frederick <fabf@skynet.be>
Acked-by: NPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Replace all calls to s_mbus_fmt in bridge drivers by calls to the
set_fmt pad op.

Remove the old try/s_mbus_fmt video ops since they are now no longer used.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NPrabhakar Lad <prabhakar.csengg@gmail.com>
Acked-by: NScott Jiang <scott.jiang.linux@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Replace all calls to try_mbus_fmt in bridge drivers by calls to the
set_fmt pad op.

[mchehab@osg.samsung.com: fix a merge conflict at mcam-core.c]
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NScott Jiang <scott.jiang.linux@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The try_mbus_fmt video op is a duplicate of the pad op. Replace all uses
in sub-devices by the set_fmt() pad op.

Since try_mbus_fmt and s_mbus_fmt both map to the set_fmt pad op (but
with a different 'which' argument), this patch will replace both
try_mbus_fmt and s_mbus_fmt by set_fmt.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kamil Debski <k.debski@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The g_mbus_fmt video op is a duplicate of the pad op. Replace all uses
by the get_fmt pad op and remove the video op.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NPrabhakar Lad <prabhakar.csengg@gmail.com>
Cc: Kamil Debski <k.debski@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Replace all calls to the enum_mbus_fmt video op by the pad
enum_mbus_code op and remove the duplicate video op.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NScott Jiang <scott.jiang.linux@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kamil Debski <k.debski@samsung.com>
Acked-by: NPrabhakar Lad <prabhakar.csengg@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

When stopping abnormally, a driver can't return from wait_for_completion.
This patch resolved this problem by changing wait_for_completion_timeout
from wait_for_completion.
Signed-off-by: NKoji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: NYoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The clock_start and clock_stop operations are now optional, don't
implement empty stubs.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Instead of forcing drivers to implement empty clock operations, make
them optional.

v4l2 clock registration in the soc-camera core should probably be
conditionned on the availability of those operations, but careful
review and/or testing of all drivers would be needed, so that should be
a separate step.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The v4l2 clock registered in soc_of_bind() must be unregistered if an
error occurs and makes the function fail.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

icd->control is the sub device dev, i.e. i2c device.
icd->pdev is the soc camera device's device.

To be consitent with power() function, we will call reset() with
icd->control as well.
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

All uses of the v4l2_clk API so far only register one clock with a fixed
name. This allows us to get rid of it, which also will make CCF and DT
integration easier.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Support the new 'which' field in the enum_frame_interval ops. Most drivers do not
need to be changed since they always returns the same enumeration regardless
of the 'which' field.

Tested for ov7670 and marvell-ccic on a OLPC XO-1 laptop.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NJonathan Corbet <corbet@lwn.net>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

These drivers are moved to support asynchronous probing,
v4l2_async_unregister_subdev() unregisters the subdev so
there isn't a need to explicitly call v4l2_device_unregister_subdev().
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>

Unlike scan_async_group(), soc_of_bind() doesn't allocate its
soc_camera_async_client structure using devm_kzalloc(), but has it
embedded inside the soc_of_info structure.  Hence on failure, it must
free the whole soc_of_info structure, and not just the embedded
soc_camera_async_client structure, as the latter causes a warning, and
may cause slab corruption:

    soc-camera-pdrv soc-camera-pdrv.0: Probing soc-camera-pdrv.0
    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 1 at drivers/base/devres.c:887 devm_kfree+0x30/0x40()
    CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-shmobile-08386-g37feb0d093cb2d8e #128
    Hardware name: Generic R8A7791 (Flattened Device Tree)
    Backtrace:
    [<c0011e7c>] (dump_backtrace) from [<c0012024>] (show_stack+0x18/0x1c)
     r6:c05a923b r5:00000009 r4:00000000 r3:00204140
    [<c001200c>] (show_stack) from [<c048ed30>] (dump_stack+0x78/0x94)
    [<c048ecb8>] (dump_stack) from [<c002687c>] (warn_slowpath_common+0x8c/0xb8)
     r4:00000000 r3:00000000
    [<c00267f0>] (warn_slowpath_common) from [<c0026980>] (warn_slowpath_null+0x24/0x2c)
     r8:ee7d8214 r7:ed83b810 r6:ed83bc20 r5:fffffffa r4:ed83e510
    [<c002695c>] (warn_slowpath_null) from [<c025e0cc>] (devm_kfree+0x30/0x40)
    [<c025e09c>] (devm_kfree) from [<c032bbf4>] (soc_of_bind.isra.14+0x194/0x1d4)
    [<c032ba60>] (soc_of_bind.isra.14) from [<c032c6b8>] (soc_camera_host_register+0x208/0x31c)
     r9:00000070 r8:ee7e05d0 r7:ee153210 r6:00000000 r5:ee7e0218 r4:ed83bc20
    [<c032c4b0>] (soc_camera_host_register) from [<c032e80c>] (rcar_vin_probe+0x1f4/0x238)
     r8:ee153200 r7:00000008 r6:ee153210 r5:ed83bc10 r4:c066319c r3:000000c0
    [<c032e618>] (rcar_vin_probe) from [<c025c334>] (platform_drv_probe+0x50/0xa0)
     r10:00000000 r9:c0662fa8 r8:00000000 r7:c06a3700 r6:c0662fa8 r5:ee153210
     r4:00000000
    [<c025c2e4>] (platform_drv_probe) from [<c025af08>] (driver_probe_device+0xc4/0x208)
     r6:c06a36f4 r5:00000000 r4:ee153210 r3:c025c2e4
    [<c025ae44>] (driver_probe_device) from [<c025b108>] (__driver_attach+0x70/0x94)
     r9:c066f9c0 r8:c0624a98 r7:c065b790 r6:c0662fa8 r5:ee153244 r4:ee153210
    [<c025b098>] (__driver_attach) from [<c025984c>] (bus_for_each_dev+0x74/0x98)
     r6:c025b098 r5:c0662fa8 r4:00000000 r3:00000001
    [<c02597d8>] (bus_for_each_dev) from [<c025b1dc>] (driver_attach+0x20/0x28)
     r6:ed83c200 r5:00000000 r4:c0662fa8
    [<c025b1bc>] (driver_attach) from [<c025a00c>] (bus_add_driver+0xdc/0x1c4)
    [<c0259f30>] (bus_add_driver) from [<c025b8f4>] (driver_register+0xa4/0xe8)
     r7:c0624a98 r6:00000000 r5:c060b010 r4:c0662fa8
    [<c025b850>] (driver_register) from [<c025ccd0>] (__platform_driver_register+0x50/0x64)
     r5:c060b010 r4:ed8394c0
    [<c025cc80>] (__platform_driver_register) from [<c060b028>] (rcar_vin_driver_init+0x18/0x20)
    [<c060b010>] (rcar_vin_driver_init) from [<c05edde8>] (do_one_initcall+0x108/0x1b8)
    [<c05edce0>] (do_one_initcall) from [<c05edfb4>] (kernel_init_freeable+0x11c/0x1e4)
     r9:c066f9c0 r8:c066f9c0 r7:c062eab0 r6:c06252c4 r5:000000ad r4:00000006
    [<c05ede98>] (kernel_init_freeable) from [<c048c3d0>] (kernel_init+0x10/0xec)
     r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c048c3c0 r4:00000000
    [<c048c3c0>] (kernel_init) from [<c000eba0>] (ret_from_fork+0x14/0x34)
     r4:00000000 r3:ee04e000
    ---[ end trace e3a984cc0335c8a0 ]---
    rcar_vin e6ef1000.video: group probe failed: -6

Fixes: 1ddc6a6c ("[media] soc_camera: add support for dt binding soc_camera drivers")

Cc: <stable@vger.kernel.org> # 3.17+
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The burst length could be BEATS_4/8/16. Before this patch, isi use default
value BEATS_4. To imporve the performance we could set it to BEATS_16.

Otherwise sometime it would cause the ISI overflow error.
Reported-by: NBo Shen <voice.shen@atmel.com>
Signed-off-by: NJosh Wu <josh.wu@atmel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Decrementing the reference count of the previous endpoint node allows to
use the of_graph_get_next_endpoint function in a for_each_... style macro.
All current users of this function that pass a non-NULL prev parameter
(that is, soc_camera and imx-drm) are changed to not decrement the passed
prev argument's refcount themselves.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

This commit moves the "buffer in use" logic from the .buf_cleanup
handler into .stop_streaming, based on advice that this is its
proper logical home.

By ensuring the list of pointers in priv->queue_buf[] is managed
as soon as possible, we avoid warnings concerning buffers in ACTIVE
state when the system cleans up after streaming stops. This fixes a
problem with modification of buffers after their content has been
cleared for passing to userspace.

After the refactoring, the buf_init and buf_cleanup functions were
found to contain only initialisation/release steps as are carried out
elsewhere if omitted; these functions and references were removed.
Signed-off-by: NWilliam Towle <william.towle@codethink.co.uk>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The code that tests that capture from a stream has stopped is
presently insufficient and the potential for a race condition
exists where frame capture may generate an interrupt between
requesting the capture process halt and freeing buffers.

This patch refactors code out of rcar_vin_videobuf_release() and
into rcar_vin_wait_stop_streaming(), and ensures there are calls
in places where we need to know that capturing has finished.
Signed-off-by: NIan Molton <ian.molton@codethink.co.uk>
Signed-off-by: NWilliam Towle <william.towle@codethink.co.uk>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>