This patch adds support to run dual pipes simultaneously.
A private ioctl to configure the pipe mode (video or still)
is also implemented.

IPU3 hardware supports a maximum of 2 streams per pipe.
With the support of dual pipes, more than 2 stream outputs
can be achieved.

This helps to support advanced camera features like
Continuous View Finder (CVF) and Snapshot During Video(SDV).

Extend ipu3 IMGU driver to support dual pipes

    1. Extend current IMGU device to contain 2 groups
       of video nodes and 2 subdevs
    2. Extend current css to support 2 pipeline and make
       CSS APIs to support 2 pipe
    3. Add a v4l2 ctrl to allow user to specify the mode
       of the pipe
    4. Check media pipeline link status to get enabled
       pipes
Signed-off-by: NBingbu Cao <bingbu.cao@intel.com>
Signed-off-by: NTian Shu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

These meta formats are used on Intel IPU3 ImgU video queues
to carry 3A statistics and ISP pipeline parameters.

V4L2_META_FMT_IPU3_3A
V4L2_META_FMT_IPU3_PARAMS
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NChao C Li <chao.c.li@intel.com>
Signed-off-by: NRajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This patch adds support for the Intel IPU v3 as found
on Skylake and Kaby Lake SoCs.

The driver glues v4l2, css(camera sub system) and other
pieces together to perform its functions, it also loads
the IPU3 firmware binary as part of its initialization.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NTomasz Figa <tfiga@chromium.org>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Implement video driver that utilizes v4l2, vb2 queue support
and media controller APIs. The driver exposes single subdevice and
six nodes.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This provides helper library to be used by v4l2 level to program
imaging pipelines and control the streaming.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This patch implements the functions to initialize
and configure IPU3 h/w such as clock, irq and power.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NTomasz Figa <tfiga@chromium.org>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

A collection of routines that are mainly used
to calculate the parameters for accelerator cluster.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This adds coeff, config parameters etc const definitions for
IPU3 programming.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Introduce functions to load and install ImgU FW blobs.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

The pools are used to store previous parameters set by
user with the parameter queue. Due to pipelining,
there needs to be multiple sets (up to four)
of parameters which are queued in a host-to-sp queue.

[mchehab@kernel.org: fixed two minor issues on comments: a space before
 tab and a typo: "vaid" -> "valid"]
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This driver uses IOVA space for buffer mapping through IPU3 MMU
to transfer data between imaging pipelines and system DDR.
Signed-off-by: NTomasz Figa <tfiga@chromium.org>
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This driver translates IO virtual address to physical
address based on two levels page tables.
Signed-off-by: NTomasz Figa <tfiga@chromium.org>
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This add all the structs of IPU3 firmware ABI.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NRajmohan Mani <rajmohan.mani@intel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Add macros and enums used for IPU3 firmware interface.
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NRajmohan Mani <rajmohan.mani@intel.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Document the interface for metadata output, including
V4L2_BUF_TYPE_META_OUTPUT buffer type and V4L2_CAP_META_OUTPUT capability
bits.
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: NTomasz Figa <tfiga@chromium.org>
Tested-by: NTian Shu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

The V4L2_BUF_TYPE_META_OUTPUT mirrors the V4L2_BUF_TYPE_META_CAPTURE with
the exception that it is an OUTPUT type. The use case for this is to pass
buffers to the device that are not image data but metadata. The formats,
just as the metadata capture formats, are typically device specific and
highly structured.
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: NTomasz Figa <tfiga@chromium.org>
Tested-by: NTian Shu Qiu <tian.shu.qiu@intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

When parallel bus is used and data-active is being parsed, incorrect
flags are cleared.

Clear the correct flag bits.

Fixes: e9be1b86 (media: v4l: fwnode:
Use default parallel flags).

Cc: stable@vger.kernel.org # for Kernel 4.20
Signed-off-by: NOndrej Jirman <megous@megous.com>
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs
can capture and compress video data from digital or analog sources. With
the Aspeed chip acting a service processor, the Video Engine can capture
the host processor graphics output.

Add a V4L2 driver to capture video data and compress it to JPEG images.
Make the video frames available through the V4L2 streaming interface.
Signed-off-by: NEddie James <eajames@linux.ibm.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Document the bindings.
Signed-off-by: NEddie James <eajames@linux.ibm.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

If link is disabled, media_entity_remote_pad returns NULL, causing a
NULL pointer deference.
Ignore links that are not enabled instead.
Signed-off-by: NHelen Koike <helen.koike@collabora.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Currently v4l2_device_register_subdev_nodes() does not initialize the
dev_parent field of the video_device structs it creates for subdevices
being registered. This leads to __video_register_device() falling back
to the parent device of associated v4l2_device struct, which often does
not match the physical device the subdevice is registered for.

Due to the problem above, the links between real devices and v4l-subdev
nodes cannot be obtained from sysfs, which might be confusing for the
userspace trying to identify the hardware.

Fix this by initializing the dev_parent field of the video_device struct
with the value of dev field of the v4l2_subdev struct. In case of
subdevices without a parent struct device, the field will be NULL and the
old behavior will be preserved by the semantics of
__video_register_device().
Signed-off-by: NTomasz Figa <tfiga@chromium.org>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

kmemdup has implemented the function that kmalloc() + memcpy().
We prefer to kmemdup rather than code opened implementation.

This issue was detected with the help of coccinelle.
Signed-off-by: NWen Yang <wen.yang99@zte.com.cn>
CC: Tomoki Sekiyama <tomoki.sekiyama@gmail.com>
CC: linux-kernel@vger.kernel.org
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

As complained by gcc:

	drivers/staging/media/rockchip/vpu/rk3288_vpu_hw_jpeg_enc.c: In function 'rk3288_vpu_jpeg_enc_set_qtable':
	drivers/staging/media/rockchip/vpu/rk3288_vpu_hw_jpeg_enc.c:70:10: warning: variable 'chroma_qtable_p' set but not used [-Wunused-but-set-variable]
	  __be32 *chroma_qtable_p;
	          ^~~~~~~~~~~~~~~
	drivers/staging/media/rockchip/vpu/rk3288_vpu_hw_jpeg_enc.c:69:10: warning: variable 'luma_qtable_p' set but not used [-Wunused-but-set-variable]
	  __be32 *luma_qtable_p;
	          ^~~~~~~~~~~~~
	drivers/staging/media/rockchip/vpu/rk3399_vpu_hw_jpeg_enc.c: In function 'rk3399_vpu_jpeg_enc_set_qtable':
	drivers/staging/media/rockchip/vpu/rk3399_vpu_hw_jpeg_enc.c:101:10: warning: variable 'chroma_qtable_p' set but not used [-Wunused-but-set-variable]
	  __be32 *chroma_qtable_p;
	          ^~~~~~~~~~~~~~~
	drivers/staging/media/rockchip/vpu/rk3399_vpu_hw_jpeg_enc.c:100:10: warning: variable 'luma_qtable_p' set but not used [-Wunused-but-set-variable]
	  __be32 *luma_qtable_p;
	          ^~~~~~~~~~~~~
	drivers/staging/media/rockchip/vpu/rockchip_vpu_enc.c: In function 'rockchip_vpu_queue_setup':
	drivers/staging/media/rockchip/vpu/rockchip_vpu_enc.c:522:33: warning: variable 'vpu_fmt' set but not used [-Wunused-but-set-variable]
	  const struct rockchip_vpu_fmt *vpu_fmt;
	                                 ^~~~~~~
	drivers/staging/media/rockchip/vpu/rockchip_vpu_enc.c: In function 'rockchip_vpu_buf_prepare':
	drivers/staging/media/rockchip/vpu/rockchip_vpu_enc.c:560:33: warning: variable 'vpu_fmt' set but not used [-Wunused-but-set-variable]
	  const struct rockchip_vpu_fmt *vpu_fmt;
	                                 ^~~~~~~
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: NEzequiel Garcia <ezequiel@collabora.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

A common mistake is to assume that initializing a var with:
	struct foo f = { 0 };

Would initialize a zeroed struct. Actually, what this does is
to initialize the first element of the struct to zero.

According to C99 Standard 6.7.8.21:

    "If there are fewer initializers in a brace-enclosed
     list than there are elements or members of an aggregate,
     or fewer characters in a string literal used to initialize
     an array of known size than there are elements in the array,
     the remainder of the aggregate shall be initialized implicitly
     the same as objects that have static storage duration."

So, in practice, it could zero the entire struct, but, if the
first element is not an integer, it will produce warnings:

	drivers/staging/media/sunxi/cedrus/cedrus.c:drivers/staging/media/sunxi/cedrus/cedrus.c:78:49:  warning: Using plain integer as NULL pointer
	drivers/staging/media/sunxi/cedrus/cedrus_dec.c:drivers/staging/media/sunxi/cedrus/cedrus_dec.c:29:35:  warning: Using plain integer as NULL pointer

As the right initialization would be, instead:

	struct foo f = { NULL };

Another way to initialize it with gcc is to use:

	struct foo f = {};

That seems to be a gcc extension, but clang also does the right thing,
and that's a clean way for doing it.

Anyway, I decided to check upstream what's the most commonly pattern.
The "= {}" pattern has about 2000 entries:

	$ git grep -E "=\s*\{\s*\}"|wc -l
	1951

The standard-C compliant pattern has about 2500 entries:

	$ git grep -E "=\s*\{\s*NULL\s*\}"|wc -l
	137
	$ git grep -E "=\s*\{\s*0\s*\}"|wc -l
	2323

Meaning that developers have split options on that.

So, let's opt to the simpler form.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

As warned by smatch:

	drivers/staging/media/sunxi/cedrus/cedrus.c: drivers/staging/media/sunxi/cedrus/cedrus.c:93 cedrus_init_ctrls() error: potential null dereference 'ctx->ctrls'.  (kzalloc returns null)

While here, remove the memset(), as kzalloc() already zeroes the
struct.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Add the necessary compatible for supporting the A64 SoC along with a
description of the capabilities of this variant.
Signed-off-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Add the necessary compatible for supporting the H5 SoC along with a
description of the capabilities of this variant.
Signed-off-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

This introduces two new compatibles for the cedrus driver, for the
A64 and H5 platforms.
Signed-off-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Not all future supported video chips will always have power management
support, and so it is important to check before calling set_power() is
defined.
Signed-off-by: NMatt Ranostay <matt.ranostay@konsulko.com>
Reviewed-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

AMG88xx has a register for setting operating mode.  This adds support
runtime PM by changing the operating mode.

The instruction for changing sleep mode to normal mode is from the
reference specifications.

https://docid81hrs3j1.cloudfront.net/medialibrary/2017/11/PANA-S-A0002141979-1.pdfReviewed-by: NMatt Ranostay <matt.ranostay@konsulko.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.

For instances using of_node_cmp, this has the side effect of now using
case sensitive comparisons. This should not matter for any FDT based
system which this is.

Cc: Steve Longerbeam <slongerbeam@gmail.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org
Signed-off-by: NRob Herring <robh@kernel.org>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Control events can be subscribed and received by the user. Therefore
drivers that support controls must expose the
V4L2_SUBDEV_FL_HAS_EVENTS flag.

[As discussed in https://lkml.org/lkml/2018/11/27/637]
Reported-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NLuca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Simulate a more precise timestamp by calculating it based on the
current framerate.
Signed-off-by: NGabriel Francisco Mandaji <gfmandaji@gmail.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: replaced division by 2 with bit shift]
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Add the R8A77980 SoC support to the R-Car VIN driver.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: NNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Add the R-Car V3H (AKA R8A77980) SoC support to the R-Car CSI2 driver.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.

Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Hyun Kwon <hyun.kwon@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NBenoit Parrot <bparrot@ti.com>
Signed-off-by: NRob Herring <robh@kernel.org>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Turning on CONFIG_DMA_API_DEBUG_SG results in the following error:

[  460.308650] ------------[ cut here ]------------
[  460.313490] qcom-venus aa00000.video-codec: DMA-API: mapping sg segment longer than device claims to support [len=4194304] [max=65536]
[  460.326017] WARNING: CPU: 3 PID: 3555 at src/kernel/dma/debug.c:1301 debug_dma_map_sg+0x174/0x254
[  460.338888] Modules linked in: venus_dec venus_enc videobuf2_dma_sg videobuf2_memops hci_uart btqca bluetooth venus_core v4l2_mem2mem videobuf2_v4l2 videobuf2_common ath10k_snoc ath10k_core ath lzo lzo_compress zramjoydev
[  460.375811] CPU: 3 PID: 3555 Comm: V4L2DecoderThre Tainted: G        W         4.19.1 #82
[  460.384223] Hardware name: Google Cheza (rev1) (DT)
[  460.389251] pstate: 60400009 (nZCv daif +PAN -UAO)
[  460.394191] pc : debug_dma_map_sg+0x174/0x254
[  460.398680] lr : debug_dma_map_sg+0x174/0x254
[  460.403162] sp : ffffff80200c37d0
[  460.406583] x29: ffffff80200c3830 x28: 0000000000010000
[  460.412056] x27: 00000000ffffffff x26: ffffffc0f785ea80
[  460.417532] x25: 0000000000000000 x24: ffffffc0f4ea1290
[  460.423001] x23: ffffffc09e700300 x22: ffffffc0f4ea1290
[  460.428470] x21: ffffff8009037000 x20: 0000000000000001
[  460.433936] x19: ffffff80091b0000 x18: 0000000000000000
[  460.439411] x17: 0000000000000000 x16: 000000000000f251
[  460.444885] x15: 0000000000000006 x14: 0720072007200720
[  460.450354] x13: ffffff800af536e0 x12: 0000000000000000
[  460.455822] x11: 0000000000000000 x10: 0000000000000000
[  460.461288] x9 : 537944d9c6c48d00 x8 : 537944d9c6c48d00
[  460.466758] x7 : 0000000000000000 x6 : ffffffc0f8d98f80
[  460.472230] x5 : 0000000000000000 x4 : 0000000000000000
[  460.477703] x3 : 000000000000008a x2 : ffffffc0fdb13948
[  460.483170] x1 : ffffffc0fdb0b0b0 x0 : 000000000000007a
[  460.488640] Call trace:
[  460.491165]  debug_dma_map_sg+0x174/0x254
[  460.495307]  vb2_dma_sg_alloc+0x260/0x2dc [videobuf2_dma_sg]
[  460.501150]  __vb2_queue_alloc+0x164/0x374 [videobuf2_common]
[  460.507076]  vb2_core_reqbufs+0xfc/0x23c [videobuf2_common]
[  460.512815]  vb2_reqbufs+0x44/0x5c [videobuf2_v4l2]
[  460.517853]  v4l2_m2m_reqbufs+0x44/0x78 [v4l2_mem2mem]
[  460.523144]  v4l2_m2m_ioctl_reqbufs+0x1c/0x28 [v4l2_mem2mem]
[  460.528976]  v4l_reqbufs+0x30/0x40
[  460.532480]  __video_do_ioctl+0x36c/0x454
[  460.536610]  video_usercopy+0x25c/0x51c
[  460.540572]  video_ioctl2+0x38/0x48
[  460.544176]  v4l2_ioctl+0x60/0x74
[  460.547602]  do_video_ioctl+0x948/0x3520
[  460.551648]  v4l2_compat_ioctl32+0x60/0x98
[  460.555872]  __arm64_compat_sys_ioctl+0x134/0x20c
[  460.560718]  el0_svc_common+0x9c/0xe4
[  460.564498]  el0_svc_compat_handler+0x2c/0x38
[  460.568982]  el0_svc_compat+0x8/0x18
[  460.572672] ---[ end trace ce209b87b2f3af88 ]---

>From above warning one would deduce that the sg segment will overflow
the device's capacity. In reality, the hardware can accommodate larger
sg segments.
So, initialize the max segment size properly to weed out this warning.

Based on a similar patch sent by Sean Paul for mdss:
https://patchwork.kernel.org/patch/10671457/Signed-off-by: NVivek Gautam <vivek.gautam@codeaurora.org>
Acked-by: NStanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Support V4L2 QP parameters in Venus encoder:
 * V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP
 * V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP
 * V4L2_CID_MPEG_VIDEO_H264_MIN_QP
 * V4L2_CID_MPEG_VIDEO_H264_MAX_QP
Signed-off-by: NKelvin Lawson <klawson@lisden.com>
Acked-by: NStanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Make the core set the reserved fields to zero in
vv4l2_pix_format_mplane.4l2_plane_pix_format,
for _MPLANE queue types.

Moving this to the core avoids having to do so in each
and every driver.
Suggested-by: NTomasz Figa <tfiga@chromium.org>
Signed-off-by: NEzequiel Garcia <ezequiel@collabora.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>

Update URL.
Signed-off-by: NLubomir Rintel <lkundrak@v3.sk>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>