Remove a couple of variables which where either completely unused,
or only ever got a value assigned to them but were never read.

Link: https://lore.kernel.org/linux-media/20211107171549.267583-2-hdegoede@redhat.comSigned-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The atomisp currenyl registers 5 pairs of devices each one
for one different run_mode, plus one for "ACC". The only
one that behaves like a normal V4L2 device is the preview
one. The others are doing weird things, and perhaps are
using some proprietary extensions to the API.

Change the device order to start with the preview one,
e. g:

	/dev/video0: ATOMISP ISP PREVIEW output
	/dev/video1: ATOMISP ISP CAPTURE output
	/dev/video2: ATOMISP ISP VIEWFINDER output
	/dev/video3: ATOMISP ISP VIDEO output
	/dev/video4: ATOMISP ACC

This way, a normal V4L2 application will get the right
device, as the first one will be the one they should use.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The atomisp driver originally used the s_parm command to
initialize the run_mode type to the driver. So, before start
setting up the streaming, s_parm should be called.

So, even having 5 "normal" video devices, one meant to be used
for each type, the run_mode was actually selected when
s_parm is called.

Without setting the run mode, applications that don't call
VIDIOC_SET_PARM with a custom atomisp parameters won't work, as
the pipeline won't be set:

	atomisp-isp2 0000:00:03.0: can't create streams
	atomisp-isp2 0000:00:03.0: __get_frame_info 1600x1200 (padded to 0) returned -22

However, commit 8a7c5594 ("media: v4l2-ioctl: clear fields in s_parm")
broke support for it, with a good reason, as drivers shoudn't be
extending the API for their own purposes.

So, as an step to allow generic apps to use this driver, put
the device's run_mode in preview after open.

After this patch, using v4l2grab starts to work on preview
mode (/dev/video2):

	$ v4l2grab -f YUYV -x 1600 -y 1200 -d /dev/video2 -n 1 -u
	$ feh out000.pnm

So, let's just setup the default run_mode that each video devnode
should assume, setting it at open() time.
Reported-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

All ISP2401 devices use the new input system. So, get rid
of the remaining definitions, replacing them by runtime
checks for BYT/CHT when applicable.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Now that the pipeline config functions can return errors, change
ia_css_dma_configure_from_info() and callers in order for them
to return errors at pipelines instead of using assert().
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Those functions can internally break, but, as they don't return
errors, internally there are some assert() calls, which is bad,
as it hangs the driver.

So, add return codes there, in preparation for removing such
assert() calls.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

If something gets wrong while setup a pipeline, return an
error code.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Propagate the lower lever ia_css config errors to the next
level.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The auto-generated code inside ia_css_isp_configs() is more
complex than it should be. Also, it doesn't return any errors.

However, the functions called by it can mis-configure the pipelines,
but, as there's no way to return errors, it internally calls the
assert() macro.

So, add a return parameter to each routine there, in order to
prepare the code to be more robust.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The contents of ia_css_isp_params.c is almost identical for
2400 and 2401. The only difference is that, on 2400, there
are some duplicated assignments. So, drop it, unifying this
file.

While here, simplify the Makefile's logic by dropping an
unused define.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Both 2400 and 2401 have this file, but they're identical.
So, drop one of them.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Both 2400 and 2401 have this file, but they're identical.

So, drop one of them.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This avoids an OOPS when VIDIOC_*_PRIORITY calls are used.

[   90.820011] BUG: kernel NULL pointer dereference, address: 0000000000000020
[   90.820021] #PF: supervisor read access in kernel mode
[   90.820026] #PF: error_code(0x0000) - not-present page
[   90.820030] PGD 1221bc067 P4D 1221bc067 PUD 1221bd067 PMD 0
[   90.820042] Oops: 0000 [#1] SMP
[   90.820048] CPU: 0 PID: 2007 Comm: qv4l2 Tainted: G         C        5.15.0-rc4+ #77
[   90.820055] Hardware name: ASUSTeK COMPUTER INC. T101HA/T101HA, BIOS T101HA.306 04/23/2019
[   90.820059] RIP: 0010:v4l2_prio_change+0xf/0x40 [videodev]
[   90.820096] Code: 48 8b 47 20 8b 40 44 25 ff ff 0f 00 48 8b 04 c5 20 58 44 c0 c3 66 0f 1f 44 00 00 0f 1f 44 00 00 8d 42 ff 83 f8 02 77 21 31 c0 <39> 16 74 20 8d 02 f0 ff 04 87 8b 06 89 c1 83 e9 01 83 f9 02 77 04
[   90.820103] RSP: 0018:ffffb348c142fd70 EFLAGS: 00010246
[   90.820109] RAX: 0000000000000000 RBX: ffff95575fbe2760 RCX: ffffb348c142fe48
[   90.820114] RDX: 0000000000000002 RSI: 0000000000000020 RDI: ffff955740996088
[   90.820118] RBP: 0000000040045644 R08: ffffffffc070da80 R09: 0000000000004000
[   90.820122] R10: 0000000000000000 R11: 0000000000000000 R12: ffff955766725300
[   90.820126] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000044
[   90.820131] FS:  00007f848526b900(0000) GS:ffff9557bbe00000(0000) knlGS:0000000000000000
[   90.820137] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   90.820141] CR2: 0000000000000020 CR3: 00000001221bf000 CR4: 00000000001006f0
[   90.820146] Call Trace:
[   90.820155]  __video_do_ioctl+0x37d/0x3b0 [videodev]
[   90.820189]  video_usercopy+0x188/0x7a0 [videodev]
[   90.820218]  ? v4l_print_control+0x20/0x20 [videodev]
[   90.820247]  ? swake_up_one+0x39/0x70
[   90.820258]  ? rcu_core+0xff/0x2e0
[   90.820267]  ? sched_clock_cpu+0x9/0xa0
[   90.820275]  ? irqtime_account_irq+0x38/0xb0
[   90.820282]  v4l2_ioctl+0x46/0x50 [videodev]
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of reinventing the wheel, use v4l2_find_nearest_size()
in order to get the closest resolution.

This should address a bug where the wrong resolution was
selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of reinventing the wheel, use v4l2_find_nearest_size()
in order to get the closest resolution.

This should address a bug where the wrong resolution was
selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of reinventing the wheel, use v4l2_find_nearest_size()
in order to get the closest resolution.

This should address a bug where the wrong resolution was
selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of reinventing the wheel, use v4l2_find_nearest_size()
in order to get the closest resolution.

This should address a bug where the wrong resolution was
selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Instead of reinventing the wheel, use v4l2_find_nearest_size()
in order to get the closest resolution.

This should address a bug where the wrong resolution was
selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The g_fmt logic is currently broken, as it is not returning
the same imagesize as previoulsy calculated by s_fmt.

Fix it by just re-using whatever it was defined at s_fmt,
if this was called before.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The internal try_fmt logic is not meant to provide everything
that the V4L2 API should provide. Also, it doesn't decrement
the pads that are used only internally by the driver, but aren't
part of the device's output.

Fix it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

move atomisp_g_fmt_cap() for it to be after try_fmt, as we'll
re-use try_fmt there.

No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Currently, the enum lists the sensor's native format as a
supported format. However, trying to setup a pipeline using
it doesn't work.

So, exclude such formats from the enum.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

There are several issues on S_FMT implementation:

- it doesn't properly handle pad_h/pad_w;
- it reports a wrong visible size to userspace;
- it allows setting the format to a raw mode, which
  currently causes the pipeline to break.

Address such issues, for it to start working with generic
apps.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The sensor width/height report is alread being printed after
its calculus. The only reason for an extra debug printk is
when dis is used. So, change its message to reflect and move
it to be inside the if checks.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Repeat the same round logic used inside s_fmt here, for the sake
of sanity.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Now that this driver starting to show signals of real progress,
let's update its TODO list.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The switch() logic there misses a break and a default case.
That makes it more prone to problems as the code change.
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Add basic support for Maxim MAX96712 quad GMSL2 deserializers. The
driver is capable of powering on the device and configuring the MIPI
CSI-2 bus in a DPHY 4-lane configuration as well as operating the
internal VTG (Video Timing Generator) and VPG (Video Pattern Generator).

Using these features the driver is able to act as a 1080p @ 30 fps V4L2
video source. Producing either a checkerboard or gradient pattern on the
CSI-2 bus, selectable thru a V4L2 control.

While the driver is useful as-is and have been used to prove the correct
operation of the MAX96712 itself and "downstream" devices using the
MAX96712 as a video source there are a lot of features missing. Most
notably the ability to operate the GMSL bus.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This is already disabled on some parts of the code, and trying
to use it with current firmware causes an error:

[   53.799946] atomisp-isp2 0000:00:03.0: can't create streams
[   53.799962] atomisp-isp2 0000:00:03.0: __get_frame_info 1600x900 (padded to 0) returned -22

So, completely disable reporting it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The atomisp sensors and logic adds an extra pad lines/columns,
called "dvs envelope". It also uses an extra 12 lines/columns
at the sensor for BYT.

As those are not visible to userspace, the V4L2 API should
decrement such values when reporting the current resolution.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The bayer formats aren't currently available for userspace
to select: those are marked as IA_CSS_FRAME_FORMAT_RAW and
trying to get them result on binary firmware load errors:

	[74625.258097] atomisp-isp2 0000:00:03.0: Using binary isp_preview_var_isp2 (id 22), type 0, mode 1, continuous true
	[74625.258146] atomisp-isp2 0000:00:03.0: Seeking for binary failed at:
	[74625.258161] CPU: 3 PID: 2792 Comm: v4l2grab Tainted: G         C        5.15.0-rc4+ #77
	[74625.258190] Hardware name: ASUSTeK COMPUTER INC. T101HA/T101HA, BIOS T101HA.306 04/23/2019
	[74625.258208] Call Trace:
	[74625.258231]  dump_stack_lvl+0x46/0x5a
	[74625.258272]  ia_css_binary_find+0xa7d/0xcf0 [atomisp]
	[74625.258570]  load_preview_binaries+0x323/0x3c0 [atomisp]
	...
	[74625.265892] atomisp-isp2 0000:00:03.0: can't create streams
	[74625.265937] atomisp-isp2 0000:00:03.0: __get_frame_info 1604x1200 (padded to 0) returned -22
	[74625.265962] atomisp-isp2 0000:00:03.0: Can't set format on ISP. Error -22

As those formats are ignored by purpose, it doesn't make any sense
to print a message like:

	atomisp_enum_fmt_cap(): format for code 3007 not found.

for those.

Yet, some day it would be interesting to also report the bayer
formats, letting userspace to decode them on a different way.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

While different sensors could have different colorspaces, the
colorspace V4L2 support didn't exist by the time atomisp driver
was written. So, the sensors won't have any data about that.

So, let's report what Asus T101HA uses (ov2680 sensor).

It may require further changes, if other sensors used on this
driver have different colorspaces.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The current logic only initializes pipe->pix after setting up a
pipeline - e. g. after start streaming.

While it makes sense to get the format of the pipeline, when
it is set, this breaks support for generic applications, as they
rely on getting the current sensor format (which is usually the
highest resolution format).

So, implement a call to the sensor's get_fmt, when this is called
before setting up a pipeline.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

When atomisp is used by a normal client, it fails to get
frame info. However, the information is confusing and misleading,
as there are several wrappers for such function, and the error
could be on different places.

So, improve the error log in order to allow narrowing down
where the error is actually occuring.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Changeset 374d62e7 ("media: v4l2-subdev: Verify v4l2_subdev_call() pad config argument")
added an extra verification for a pads parameter for enum mbus
format code.

Such change broke atomisp, because now the V4L2 core
refuses to enum MBUS formats if the state is empty.

So, add .which field in order to select the active formats,
in order to make it work again.

While here, improve error messages.

Fixes: 374d62e7 ("media: v4l2-subdev: Verify v4l2_subdev_call() pad config argument")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This is almost a BUG report with RFC patch that just avoids kernel
oopses. Thus, prefixed with [BUG][RFC].

Here is the kernel log after running `v4l2-compliance -d /dev/video4`
with this patch applied:

	kern  :err   : [25507.580392] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.592343] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.592995] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.593685] atomisp-isp2 0000:00:03.0: atomisp_g_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.593719] atomisp-isp2 0000:00:03.0: atomisp_g_parm(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.593727] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	[omitting 42 same messages]
	kern  :err   : [25507.593976] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594191] atomisp-isp2 0000:00:03.0: atomisp_g_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594449] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	[omitting 43 same messages]
	kern  :err   : [25507.594756] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594779] atomisp-isp2 0000:00:03.0: atomisp_g_ctrl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594787] atomisp-isp2 0000:00:03.0: atomisp_s_ctrl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594803] atomisp-isp2 0000:00:03.0: atomisp_camera_g_ext_ctrls(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594880] atomisp-isp2 0000:00:03.0: atomisp_enum_fmt_cap(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594915] atomisp-isp2 0000:00:03.0: atomisp_g_parm(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595058] atomisp-isp2 0000:00:03.0: atomisp_try_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595089] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595124] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595221] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595241] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.601571] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.607496] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.608604] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.611988] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.617420] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.618429] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.618811] atomisp-isp2 0000:00:03.0: atomisp_g_parm(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.622193] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.627355] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.628391] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.631143] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.635813] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.636489] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.636504] atomisp-isp2 0000:00:03.0: atomisp_s_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.636516] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.639111] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.646152] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.646831] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.646847] atomisp-isp2 0000:00:03.0: atomisp_s_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.650079] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.657476] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.658741] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.658759] atomisp-isp2 0000:00:03.0: atomisp_s_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.658771] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.660959] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.666665] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.667397] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC

[mchehab: fix coding style]
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Date: Mon, 06 Nov 2017 23:36:36 +0000

This isn't the ideal final solution but it stops the main problem for now
where an open (often from udev) races the device initialization and we try
and load the firmware twice at the same time. This needless to say doesn't
usually end well.

[kitakar: ported to upstream Kernel]
[mchehab: make comments to use our coding style]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Microsoft Surface 3 does not describe CsiPort/CsiLanes in DSDT [1] or
EFI, or at least not desctibed in the forms the current atomisp driver
expects. This results in the default values (port: 0 lanes: 1) to be
used, which does not work.

So, define them ourselves in the driver.

The user-facing camera is AR0330 (2-lane) and the world-facing camera
is OV8835 (4-lane).

According to the portconfigs definition in atomisp_csi_lane_config()
[atomisp_v4l2.c]:

	} portconfigs[] = {
		/* Tangier/Merrifield available lane configurations */
		{ 0x00, { 4, 1, 0 } },		/* 00000 */
		{ 0x01, { 3, 1, 0 } },		/* 00001 */
		{ 0x02, { 2, 1, 0 } },		/* 00010 */
		{ 0x03, { 1, 1, 0 } },		/* 00011 */
		{ 0x04, { 2, 1, 2 } },		/* 00100 */
		{ 0x08, { 3, 1, 1 } },		/* 01000 */
		{ 0x09, { 2, 1, 1 } },		/* 01001 */
		{ 0x0a, { 1, 1, 1 } },		/* 01010 */

		/* Anniedale/Moorefield only configurations */
		{ 0x10, { 4, 2, 0 } },		/* 10000 */
		{ 0x11, { 3, 2, 0 } },		/* 10001 */
		{ 0x12, { 2, 2, 0 } },		/* 10010 */
		{ 0x13, { 1, 2, 0 } },		/* 10011 */
		{ 0x14, { 2, 2, 2 } },		/* 10100 */
		{ 0x18, { 3, 2, 1 } },		/* 11000 */
		{ 0x19, { 2, 2, 1 } },		/* 11001 */
		{ 0x1a, { 1, 2, 1 } },		/* 11010 */
	};

4-lane camera is always connected to the PRIMARY (port1) port [2]. In
this case, 2-lane camera can be connected to the only SECONDARY (port0)
port.

So, add these data accordingly as the gmin_cfg_var ACPI variables for
Surface 3.

[1] https://github.com/linux-surface/acpidumps/blob/7da48a392b4085c2021952290def1fc28505a643/surface_3/dsdt.dsl#L5879-L6278

[2] Yes, the PRIMARY port is port1 according to atomisp_camera_port
    [atomisp.h]:

	enum atomisp_camera_port {
		ATOMISP_CAMERA_PORT_SECONDARY,
		ATOMISP_CAMERA_PORT_PRIMARY,
		ATOMISP_CAMERA_PORT_TERTIARY,
		ATOMISP_CAMERA_NR_PORTS
	};
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Now that we made atomisp work with firmware version
irci_stable_candrpv_0415_20150521_0458 also for ISP2401, the
release_version for ISP2401 is not irci_ecr-master_20150911_0724
anymore.

So, use the same release_version for both ISP2400 and ISP2401 (i.e.,
irci_stable_candrpv_0415_20150521_0458).

Referred to the following diff to make this patch:
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/drivers/staging/media/atomisp/pci/sh_css_firmware.c?id=3c0538fbad9f1d07d588f631e380256d941e3d3a
  ("media: atomisp: get rid of most checks for ISP2401 version")
  changes for file sh_css_firmware.c
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This patch removes the unnamed struct `shading` from
`struct sh_css_sp_pipeline` as well as its usage [1].

[1] added on updating css version to irci_master_20150701_0213
    https://raw.githubusercontent.com/intel/ProductionKernelQuilts/cht-m1stable-2016_ww31/uefi/cht-m1stable/patches/cam-0439-atomisp2-css2401-and-2401_legacy-irci_master_2015070.patch
    ("atomisp2: css2401 and 2401_legacy-irci_master_20150701_0213")

This patch, together with the 4 patches applied before it revert incompatible
changes in the current css version for ISP2401 (irci_ecr-master_20150911_0724)
back to irci_stable_candrpv_0415_20150521_0458.

Some `struct`s are `sizeof()`ed in sh_css_firmware.c file. So, I guess
issues will happen if these sizes are changed. Therefore, keep them the
same as css version irci_stable_candrpv_0415_20150521_0458 to make atomisp
work for firmware made for such css version since we don't have firmware
made for the current css version.
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>