v4l2_subdev_link_validate() is the default op for validating a link. In V4L2
subdev context, it is used to call a pad op which performs the proper link
check without much extra work.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Document that format related configuration is done through pad ops in case
the driver does use the media framework.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The purpose of the link_validate() op is to allow an entity driver to ensure
that the properties of the pads at the both ends of the link are suitable
for starting the pipeline. link_validate is called on sink pads on active
links which belong to the active part of the graph.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add three other colour orders for 10-bit to 8-bit DPCM compressed raw bayer
pixel formats.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Document guidelines how 4CC codes should be named. Only raw bayer is
included currently. Other formats should be documented later on.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add control class for image processing controls. The control class deals
with controls processing image, for example digital gain or noise filtering,
which can be present in any part of the pipeline.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add image source control class. This control class is intended to contain
low level controls which deal with control of the image capture process ---
the A/D converter in image sensors, for example.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

V4L2 uses the enum type in IOCTL arguments in IOCTLs that were defined until
the use of enum was considered less than ideal. Recently Rémi Denis-Courmont
brought up the issue by proposing a patch to convert the enums to unsigned:

<URL:http://www.spinics.net/lists/linux-media/msg46167.html>

This sparked a long discussion where another solution to the issue was
proposed: two sets of IOCTL structures, one with __u32 and the other with
enums, and conversion code between the two:

<URL:http://www.spinics.net/lists/linux-media/msg47168.html>

Both approaches implement a complete solution that resolves the problem. The
first one is simple but requires assuming enums and __u32 are the same in
size (so we won't break the ABI) while the second one is more complex and
less clean but does not require making that assumption.

The issue boils down to whether enums are fundamentally different from __u32
or not, and can the former be substituted by the latter. During the
discussion it was concluded that the __u32 has the same size as enums on all
archs Linux is supported: it has not been shown that replacing those enums
in IOCTL arguments would break neither source or binary compatibility. If no
such reason is found, just replacing the enums with __u32s is the way to go.

This is what this patch does. This patch is slightly different from Remi's
first RFC (link above): it uses __u32 instead of unsigned and also changes
the arguments of VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY.
Signed-off-by: NRémi Denis-Courmont <remi@remlab.net>
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The function vb2_dma_contig_vaddr returns a void * not an integer.

Quiets the sparse noise:

warning: Using plain integer as NULL pointer
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Pawel Osciak <pawel@osciak.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Include the header to pickup the definitions of the exported symbols.

Quiets the following sparse warnings:

warning: symbol 'vb2_dma_contig_memops' was not declared. Should it be static?
warning: symbol 'vb2_dma_contig_init_ctx' was not declared. Should it be static?
warning: symbol 'vb2_dma_contig_cleanup_ctx' was not declared. Should it be static?
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Pawel Osciak <pawel@osciak.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

There is no needs to keep .remove under .exit.text. This driver is for a
standalone chip that could be on any board and connected to any i2c bus.

At the same time we don't need to keep the as3645a_probe() after initializing
the device. Therefore we mark it and relevant functions with __devinit tag.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The mf_low value must be a multiple of mf_inc. Round it up to the
nearest mf_inc multiple after computing it.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Support for the legacy crop API is emulated in the subdev core.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Support for the legacy crop API is emulated in the subdev core.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Configure CFA interpolation automatically based on the input format.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

For consistency reasons, rename the last remaining occurences of
rgb_to_ycbcr to csc (color space conversion).
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When applications modify preview engine parameters, the new values are
applied to the hardware by the preview engine interrupt handler during
vertical blanking. If the parameters are being changed when the
interrupt handler is called, it just delays applying the parameters
until the next frame.

If an application modifies the parameters for every frame, and the
preview engine interrupt is triggerred synchronously, the parameters are
never applied to the hardware.

Fix this by storing new parameters in a shadow copy, and switch the
active parameters with the shadow values atomically.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Instead of using a large switch/case statement to return offsets to and
sizes of individual preview engine parameters in the parameters and
configuration structures, store the information in the update_attrs
table and use it at runtime.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Rename the blk_adj and rgb2ycbcr fields to blkadj and csc respectively.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The feature_bit is always equal to 1 << array position, remove it and
compute the value dynamically.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The preview engine parameters are referenced by a value suitable for
being used in a bitmask. Two macros named OMAP3ISP_PREV_* and PREV_* are
declared for each parameter and are used interchangeably. Remove the
private macro.

Replace the configuration bit field in the parameter update attributes
structure with a boolean that indicates whether the parameter can be
updated through the preview engine configuration ioctl.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The flag isn't used, remove it.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

If no parameter needs to be modified, make preview_config() and
preview_setup_hw() return immediately. This speeds up interrupt handling
in the common case.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Brightness and contrast are handled through V4L2 controls. Their
configuration bit in the preview engine update attributes table is set
to -1 to reflect that. However, the VIDIOC_OMAP3ISP_PRV_CFG ioctl
handler doesn't handle -1 correctly as a configuration bit value, and
erroneously considers that the parameter has been selected for update by
the ioctl caller. Fix this.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Handle errors from omap3isp_csi2_reset() in omap3isp_csiphy_acquire().
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When propagating the frame number through the pipeline, the frame number
must be incremented at frame start by the appropriate IRQ handler. This
was properly handled for the CSI2 and CCP2 receivers, but not when the
CCDC parallel interface is used.

ADD frame number incrementation to the HS/VS interrupt handler. As the
HS/VS interrupt is also generated for frames received by the CSI2 and
CCP2 receivers, remove explicit propagation handling from the serial
receivers.
Reported-by: NKruno Mrak <kruno.mrak@matrix-vision.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Tested-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

iommu_domain_free() was called in isp_remove() before omap3isp_put().
omap3isp_put() must not save the context if the IOMMU no longer is there.
Fix this.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The OMAP3 ISP preview engine will violate the L4 bus protocol if we try
to write some of its internal registers after it failed to stop
properly. This generates an external abort on non-linefetch fault,
triggering a fatal kernel oops.

We can't always prevent preview engine stop failures (they can for
instance be caused by a sensor crash), but we can improve the system
reliability by refusing to start streaming on a pipeline that contains
the preview engine if it failed to stop. The driver will then eventually
reset the ISP (when all applications will have closed their file handles
related to OMAP3 ISP device nodes), making the ISP usable again.

Fixes: NB#291334 - camera: Recover gracefully from ISP crash instead of oopsing
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Reviewed-by: NPhil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The get_unmapped_area() operation was forgotten during conversion to
videobuf2. Fix it.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Properly validate the user-supplied index against the number of inputs.
The code used the pin local variable instead of the index by mistake.
Reported-by: NJozef Vesely <vesely@gjh.sk>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: stable@vger.kernel.org
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The V4L querystd implementation appears to want to narrow down the
list of available standards by starting with a hardware-supported list
and then attempting to detect which among those are actually
available.  Prior to this change in the pvrusb2 driver we started with
all possible standards.  With this change in place we instead narrow
to just the standards that we know the hardware can actually support.
For example, this removes the ATSC standards from the list if we
aren't dealing with a hybrid device...
Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Get rid of pvrusb2-local implementation for enumeration of video
standards - with video_ioctl2 this happens automatically now in the
v4l core.
Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

With the transition to ioctl2, the pvrusb2 driver's own standards
enumeration is no longer used.  Instead a generic algorithm internal
to v4l is used (which is a great idea - since the pvrusb2
implementation itself was generic anyway).  This change ensures that
the v4l algorithm works with the correct set of hardware supported
standards.  This resolves a FIXME left behind from the videodev_ioctl2
transition.
Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Other aspects of the pvrusb2 driver - including in particular those
dealing with video standards - all use internal control IDs for
uniform access by the interfaces.  By exporting the querystd result as
another control ID, uniform access to it becomes available through the
sysfs interface.
Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>