- 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>

A hunk, removing this code has been lost between versions 6 and 7 of
patch "soc-camera: add V4L2-async support." The code is harmless, but
redundant.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

This patch drops driver specific wait_prepare() and
wait_finish() callbacks from vb2_ops and instead uses
the the helpers vb2_ops_wait_prepare/finish() provided
by the vb2 core, the lock member of the queue needs
to be initalized to a mutex so that vb2 helpers
vb2_ops_wait_prepare/finish() can make use of it.
Signed-off-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Josh Wu <josh.wu@atmel.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The V4L2 API requires both .capabilities and .device_caps fields of
struct v4l2_capability to be set. Otherwise the compliance checker
complains and since commit "v4l2-ioctl: WARN_ON if querycap didn't fill
device_caps" a compile-time warning is issued. Fix this non-compliance
in the rcar_vin driver.
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The V4L2 API requires both .capabilities and .device_caps fields of
struct v4l2_capability to be set. Otherwise the compliance checker
complains and since commit "v4l2-ioctl: WARN_ON if querycap didn't fill
device_caps" a compile-time warning is issued. Fix this non-compliance
in several soc-camera camera host drivers.
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Tested-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The progressive input is captured by the field interrupt.
Therefore the end of frame interrupt is unnecessary.
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>

By applying this patch, it sets to VSYNC field toggle mode not only
at the time of progressive mode but at the time of an interlace mode.
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>

Signed-off-by: NKoji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: NYoshihiro Kaneko <ykaneko0929@gmail.com>
[g.liakhovetski@gmx.de: minor stylistic and formatting corrections]
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Based on platform device work by Matsuoka-san.
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>

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>

In order to have subsytem agnostic media bus format definitions we've
moved media bus definition to include/uapi/linux/media-bus-format.h and
prefixed values with MEDIA_BUS_FMT instead of V4L2_MBUS_FMT.

Reference new definitions in all platform drivers.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: NSekhar Nori <nsekhar@ti.com>
Acked-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>

A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

The drivers should use dmaengine_pause() API instead of
accessing the device_control which will be deprecated soon
Signed-off-by: NVinod Koul <vinod.koul@intel.com>

This patch allows for exporting a dmabuf descriptor from soc_camera drivers.
Signed-off-by: NKazunori Kobayashi <kkobayas@igel.co.jp>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>