Digging into the documentation we find that the DT_ID bitfield is used to
map the six bit DT to a two bit ID code. This value is concatenated to the
VC bitfield to create a CID value. DT_ID is the two least significant bits
of CID and VC the most significant bits.

Originally we set dt_id = vc * 4 in and then subsequently set dt_id = vc.

commit 3c4ed72a ("media: camss: sm8250: Virtual channels for CSID")
silently fixed the multiplication by four which would give a better
value for the generated CID without mentioning what was being done or why.

Next up I haplessly changed the value back to "dt_id = vc * 4" since there
didn't appear to be any logic behind it.

Hans asked what the change was for and I honestly couldn't remember the
provenance of it, so I dug in.

Link: https://lore.kernel.org/linux-arm-msm/edd4bf9b-0e1b-883c-1a4d-50f4102c3924@xs4all.nl/



Add a comment so the next hapless programmer doesn't make this same
mistake.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

A previous patch I had removed the returns from vfe_disable() since we
didn't trap any meaningful errors. Konrad pointed out vfe_reset() could
return an error, which is true.

Trap the vfe_reset() error code and throw it up the callstack.

Suggested-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

We can move vfe_disable() into a common routine in the core VFE file
provided we make wm_stop() a VFE specific callback.

The callback is required to capture the case where VFE 17x currently isn't
VC enabled where as VFE 480 is.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Some VFEs have four RDIs apiece. Right now the ISR code has a hard-coded
value which tops-out at RDI2 meaning only three RDIs can be utilised in
practice.

Extend out the various routines in camss-vfe-17x.c to support the higher
RDI count.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Several of our upstream and soon-to-be upstream SoC CAMSS dtsi declare
csiphyX as opposed to the older clock name csiX_phy.

Right now the CAMSS code will fail to set the csiphyX clock even if we have
declared it in our list of clocks. For sdm845 and sm8250 we appear to "get
away" with this error, however on sc8280xp we don't.

The right approach here is to set the clock when it is declared. If a SoC
doesn't require or a SoC driver implementer doesn't think we need, then the
clock ought to simply be omitted from the clock list.

Include csiphyX in the set of permissible strings which will subsequently
lead to the csiphyX clock being set during csiphy_set_clock_rates() phase.

sdm845 and sm8250 will work with the code as-is so I've omitted this from a
suggested Fixes list.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

The csiphyX_timer and csiX_phy values need not be hard-coded. We can
functionally decompose the string matching inside of a loop.

Static string values are brittle, difficult to extend and not required
anyway since the camss->res->csiphy_num value informs us of the number
of CSIPHYs and hence the set of potential clocks for a given CSIPHY.

In simple terms if we have five CSIPHYs we can have no more and no less
than five csiphy_timer clocks. Similarly csi_phy core clocks have a 1:1
relationship with the PHY they clock.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

The number of Video Front End - VFE or Image Front End - IFE supported
with new SoCs can vary both for the full and lite cases.

For example sdm845 has one vfe_lite and two vfe interfaces with the vfe
clock called simply "vfe_lite" with no integer postfix. sc8280xp has four
vfe and four vfe lite blocks.

At the moment we declare vfe_lite0 and vfe_lite1 for sm8250 but never set
those clocks because we don't match the strings.

We need to support the following clock name formats

- vfeN
- vfe_liteN
- vfe_lite

with N being any reasonably sized integer.

There are two sites in this code which need to do the same thing,
constructing and matching strings with the pattern above, so encapsulate
the logic in one function.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

We have a very convoluted if/else legacy here which needs to be
rationalised to make it more sustainable.

Adding in another Soc or two will make some of these if statements into
increasingly large multi-clause behemoths.

Introduce switches in the obvious places to despaghetiify.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

From sdm845 onwards we need to ensure the VFE is powered on prior to
switching on the CSID.

Currently the code tests for sdm845, sm8250 and then does get/set. This is
not extensible and it turns out is not necessary either since vfe_get and
vfe_set reference count.

Remove the over-conservative SoC version check.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # rb3 # db410c
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Each Video Front End - VFE - has a variable number of Raw Data Interfaces -
RDIs associated with it.

The CAMSS code started from a naive implementation where a fixed define was
used as a control in a for(){} loop iterating through RDIs.

That model scales badly. An attempt was made with  VFE_LINE_NUM_GEN2 and
VFE_LINE_NUM_GEN1 to differentiate between SoCs but, the problem with that
is "gen1" and "gen2" have no meaning in the silicon. There is no fixed
constraint in the silicon between VFE and RDI, it is entirely up to the SoC
designers how many VFEs are populated and how many RDIs to associate with
each VFE.

As an example sdm845 has VFE version 175 and sm8250 VFE version 480.
sdm845 has 2 VFEs with 4 RDIs and 1 VFE Lite with 4 RDIs.
sm8250 has 2 VFEs with 3 RDIs and 2 VFE Lite with 4 RDIs.

Clearly then we need a more granular model to capture the necessary data.

The defines have gone away to be replaced with per-SoC data but, we haven't
populated the parameter data with the real values.

Let's call those values out now

msm8916:
1 x VFE
3 x RDI per VFE (not 4)

msm8996:
2 x VFE
3 x RDI per VFE (not 4)

sdm660:
2 x VFE
3 x RDI per VFE (not 4)

sdm845:
2 x VFE
4 x RDI per VFE (not 3)
1 x VFE Lite
4 x RDI per VFE Lite (not 3)

sm8250:
2 x VFE
3 x RDI per VFE (not 4)
2 x VFE Lite
4 x RDI per VFE Lite

This more complex and correct mapping was not possible prior to passing
values via driver data. Now that we have that change in place we can
correctly map VFEs to RDIs for each VFE.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

It is possible to pass all of the CAMSS subdevice internal operations
pointers from the controlling resources structure with an additional
pointer added to the resources structure.

This allows for the removal of most of the probe-time control structures.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

line_num indicates the number of RDI - raw data interface channels which
are associated with a given IFE/VFE - image/video front end.

On several SoCs the RDI number is not static for each VFE - for example
on sm8250 VFE Lite has four RDIs where regular VFE has three.

Assigning line_num statically in the subdev_init() phase initialises
each VFE to the lower number, meaning in practical terms that we are
lobbing off one RDI on some VFEs.

Interrupt handling uses static for (i = RDI0; i < RDI2; i++) {} in some
of our VFE blocks but this can't work for situations where we have a
mixture of VFE @ 3 RDI and VFE-lite @ 4 RDI blocks.

First step to remediate is to pass line_num from a compat string
controlled data-structure and do so on a per-VFE basis.

Later patches will assign the correct number of RDI blocks per VFE.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

The following variables are being assigned statically based on
compatible strings in the probe path.

* enum camss_version version;
* unsigned int csiphy_num;
* unsigned int csid_num;
* unsigned int vfe_num;
* unsigned int vfe_lite_num;
* unsigned int vfe_total_num;

Migrate those variables to resource parameters passed in on platform
probe arguments. The one caveat is for VFE it has been necessary to
intoduce a new variable vfe_total_num to capture the aggregate value of
vfe_num + vfe_lite_num.

All the rest of the changes are rote camss->variable to
camss->res->variable with the parameter tables now populating the listed
variables.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Pass the bandwidth table as a platform parameter not if/else derived
pointer to the static table.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

There is a lot of unnecessary if/elsing in this code that arguably
should never have made it upstream when adding a second let alone
subsequent SoC.

I'm guilty of not fixing the mess myself when adding in the sm8250.
Before adding in any new SoCs or resources lets take the time to cleanup
the resource passing.

First step is to pass the generic struct camss_resources as a parameter
per the compatible list.

Subsequent patches will address the other somewhat disparate strutures
which we are also doing if/else on and assigning statically.

Squashed down a commit to drop useless NULL assignment for ispif resources.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Rename non-specific struct resources {} to struct camss_subdev_resources {}

Each logical block in CAMSS has a number of regulators, clocks and resets
associated with it. We represent these blocks as v4l subdevices.

The name "struct camss_subdev_resources" is a more descriptive and accurate
name.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

There is no good reason to differentiate the two resource structures
here. As part of a general tidyup of the declaration and passing of
resources within in the CAMSS driver it will be advantageous to have
one unified resource structure.

The two structures are very similar anyway thus leading more credence
still to the argument there should be only one.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

The "admin-guide" documentation for the Digiteq Automotive MGB4 driver.

Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Digiteq Automotive MGB4 is a modular frame grabber PCIe card for automotive
video interfaces. As for now, two modules - FPD-Link and GMSL - are
available and supported by the driver. The card has two inputs and two
outputs (FPD-Link only).

In addition to the video interfaces it also provides a trigger signal
interface and a MTD interface for FPGA firmware upload.

Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Let the V4L2 core fill in bus_info.

This fixes this warning:

drivers/media/radio/radio-si476x.c: In function 'si476x_radio_querycap':
drivers/media/radio/radio-si476x.c:333:28: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
  333 |                  "platform:%s", radio->v4l2dev.name);
      |                            ^~
drivers/media/radio/radio-si476x.c:332:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
  332 |         snprintf(capability->bus_info, sizeof(capability->bus_info),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  333 |                  "platform:%s", radio->v4l2dev.name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Fixes this warning:

drivers/media/platform/verisilicon/hantro_drv.c: In function 'hantro_add_func':
drivers/media/platform/verisilicon/hantro_drv.c:902:49: warning: '%s' directive output may be truncated writing up to 127 bytes into a region of size 64 [-Wformat-truncation=]
  902 |         snprintf(vfd->name, sizeof(vfd->name), "%s-%s", match->compatible,
      |                                                 ^~
drivers/media/platform/verisilicon/hantro_drv.c:902:9: note: 'snprintf' output between 5 and 132 bytes into a destination of size 64
  902 |         snprintf(vfd->name, sizeof(vfd->name), "%s-%s", match->compatible,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  903 |                  funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER ? "enc" : "dec");
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/verisilicon/hantro_drv.c:902:49: warning: '%s' directive output may be truncated writing up to 127 bytes into a region of size 64 [-Wformat-truncation=]
  902 |         snprintf(vfd->name, sizeof(vfd->name), "%s-%s", match->compatible,
      |                                                 ^~
drivers/media/platform/verisilicon/hantro_drv.c:902:9: note: 'snprintf' output between 5 and 132 bytes into a destination of size 64
  902 |         snprintf(vfd->name, sizeof(vfd->name), "%s-%s", match->compatible,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  903 |                  funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER ? "enc" : "dec");
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Fill in bus_info with fixed name.

This fixes this compiler warning:

drivers/media/radio/radio-miropcm20.c: In function 'vidioc_querycap':
drivers/media/radio/radio-miropcm20.c:206:57: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 28 [-Wformat-truncation=]
  206 |         snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name);
      |                                                         ^~
drivers/media/radio/radio-miropcm20.c:206:9: note: 'snprintf' output between 5 and 40 bytes into a destination of size 32
  206 |         snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

This fixes this warning:

drivers/media/radio/radio-isa.c: In function 'radio_isa_querycap':
drivers/media/radio/radio-isa.c:39:57: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 28 [-Wformat-truncation=]
   39 |         snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", isa->v4l2_dev.name);
      |                                                         ^~
drivers/media/radio/radio-isa.c:39:9: note: 'snprintf' output between 5 and 40 bytes into a destination of size 32
   39 |         snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", isa->v4l2_dev.name);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Let the V4L2 core fill this in.

Fixes this warning:

drivers/staging/media/deprecated/atmel/atmel-isc-base.c: In function 'isc_querycap':
drivers/staging/media/deprecated/atmel/atmel-isc-base.c:496:28: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
  496 |                  "platform:%s", isc->v4l2_dev.name);
      |                            ^~
drivers/staging/media/deprecated/atmel/atmel-isc-base.c:495:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
  495 |         snprintf(cap->bus_info, sizeof(cap->bus_info),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  496 |                  "platform:%s", isc->v4l2_dev.name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>

Let the V4L2 core fill this in.

This fixes this warning:

drivers/media/platform/ti/am437x/am437x-vpfe.c: In function 'vpfe_querycap':
drivers/media/platform/ti/am437x/am437x-vpfe.c:1279:35: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
 1279 |                         "platform:%s", vpfe->v4l2_dev.name);
      |                                   ^~
drivers/media/platform/ti/am437x/am437x-vpfe.c:1278:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
 1278 |         snprintf(cap->bus_info, sizeof(cap->bus_info),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1279 |                         "platform:%s", vpfe->v4l2_dev.name);
      |                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Lad Prabhakar <prabhakar.csengg@gmail.com>

Fixes this compiler warning:

drivers/media/platform/renesas/rcar_drif.c: In function 'rcar_drif_querycap':
drivers/media/platform/renesas/rcar_drif.c:874:66: warning: '%s' directive output may be truncated writing up to 63 bytes into a region of size 23 [-Wformat-truncation=]
  874 |         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
      |                                                                  ^~
drivers/media/platform/renesas/rcar_drif.c:874:9: note: 'snprintf' output between 10 and 73 bytes into a destination of size 32
  874 |         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  875 |                  sdr->vdev->name);
      |                  ~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Let the V4L2 core fill this in.

Fixes these compiler warnings:

drivers/media/platform/microchip/microchip-isc-base.c: In function 'isc_querycap':
drivers/media/platform/microchip/microchip-isc-base.c:486:28: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
  486 |                  "platform:%s", isc->v4l2_dev.name);
      |                            ^~
drivers/media/platform/microchip/microchip-isc-base.c:485:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
  485 |         snprintf(cap->bus_info, sizeof(cap->bus_info),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  486 |                  "platform:%s", isc->v4l2_dev.name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/microchip/microchip-isc-base.c: In function 'isc_mc_init':
drivers/media/platform/microchip/microchip-isc-base.c:1996:76: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
 1996 |         snprintf(isc->mdev.bus_info, sizeof(isc->mdev.bus_info), "platform:%s",
      |                                                                            ^~
drivers/media/platform/microchip/microchip-isc-base.c:1996:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
 1996 |         snprintf(isc->mdev.bus_info, sizeof(isc->mdev.bus_info), "platform:%s",
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1997 |                  isc->v4l2_dev.name);
      |                  ~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>

Fixes this compiler warning:

drivers/media/test-drivers/vivid/vivid-core.c: In function 'vidioc_querycap':
drivers/media/test-drivers/vivid/vivid-core.c:243:35: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 23 [-Wformat-truncation=]
  243 |                         "platform:%s", dev->v4l2_dev.name);
      |                                   ^~
drivers/media/test-drivers/vivid/vivid-core.c:242:9: note: 'snprintf' output between 10 and 45 bytes into a destination of size 32
  242 |         snprintf(cap->bus_info, sizeof(cap->bus_info),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  243 |                         "platform:%s", dev->v4l2_dev.name);
      |                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Don't use defines for the size of a name field, everyone
should just use sizeof(). In this case it was never used,
but it is bad practice, so just drop it.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Don't rely on a define, let the compiler use the actual
field size.

Remove all uses of the V4L2_SUBDEV_NAME_SIZE define and also
drop the define itself.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

This resolves a lot of the string truncate compiler warnings.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Increase the size of the name field to prevent a lot of
string truncate compiler warnings.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Fixes this compiler warning:

drivers/media/pci/zoran/zoran_card.c: In function 'zoran_probe':
drivers/media/pci/zoran/zoran_card.c:1316:62: warning: '%u' directive output may be truncated writing between 1 and 5 bytes into a region of size between 0 and 31 [-Wformat-truncation=]
 1316 |         snprintf(ZR_DEVNAME(zr), sizeof(ZR_DEVNAME(zr)), "%s[%u]",
      |                                                              ^~
drivers/media/pci/zoran/zoran_card.c:1316:58: note: directive argument in the range [0, 65535]
 1316 |         snprintf(ZR_DEVNAME(zr), sizeof(ZR_DEVNAME(zr)), "%s[%u]",
      |                                                          ^~~~~~~~
drivers/media/pci/zoran/zoran_card.c:1316:9: note: 'snprintf' output between 4 and 39 bytes into a destination of size 32
 1316 |         snprintf(ZR_DEVNAME(zr), sizeof(ZR_DEVNAME(zr)), "%s[%u]",
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1317 |                  zr->card.name, zr->id);
      |                  ~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Just show the Camera index as input name in VIDIOC_ENUM_INPUT,
no need to show the subdev name as well as that is meaningless for
users anyway.

This fixes this compiler warning:

drivers/media/platform/renesas/renesas-ceu.c: In function 'ceu_enum_input':
drivers/media/platform/renesas/renesas-ceu.c:1195:59: warning: '%s' directive output may be truncated writing up to 47 bytes into a region of size between 14 and 23 [-Wformat-truncation=]
 1195 |         snprintf(inp->name, sizeof(inp->name), "Camera%u: %s",
      |                                                           ^~
drivers/media/platform/renesas/renesas-ceu.c:1195:9: note: 'snprintf' output between 10 and 66 bytes into a destination of size 32
 1195 |         snprintf(inp->name, sizeof(inp->name), "Camera%u: %s",
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1196 |                  inp->index, ceusd->v4l2_sd->name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

Fixes this compiler warning:

drivers/media/cec/core/cec-core.c: In function 'cec_allocate_adapter':
drivers/media/cec/core/cec-core.c:317:21: warning: '/input0' directive output may be truncated writing 7 bytes into a region of size between 1 and 32 [-Wformat-truncation=]
  317 |                  "%s/input0", adap->name);
      |                     ^~~~~~~
drivers/media/cec/core/cec-core.c:316:9: note: 'snprintf' output between 8 and 39 bytes into a destination of size 32
  316 |         snprintf(adap->input_phys, sizeof(adap->input_phys),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  317 |                  "%s/input0", adap->name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Fixes this compiler warning:

drivers/media/rc/ati_remote.c: In function 'ati_remote_probe':
drivers/media/rc/ati_remote.c:876:21: warning: ' mouse' directive output may be truncated writing 6 bytes into a region of size between 1 and 80 [-Wformat-truncation=]
  876 |                  "%s mouse", ati_remote->rc_name);
      |                     ^~~~~~
drivers/media/rc/ati_remote.c:875:9: note: 'snprintf' output between 7 and 86 bytes into a destination of size 80
  875 |         snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  876 |                  "%s mouse", ati_remote->rc_name);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Sean Young <sean@mess.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>

Fixes this compiler warning:

drivers/media/pci/cx18/cx18-driver.c: In function 'cx18_init_struct1':
drivers/media/pci/cx18/cx18-driver.c:688:65: warning: '%s' directive output may be truncated writing up to 35 bytes into a region of size 11 [-Wformat-truncation=]
  688 |         snprintf(cx->in_workq_name, sizeof(cx->in_workq_name), "%s-in",
      |                                                                 ^~
In function 'cx18_create_in_workq',
    inlined from 'cx18_init_struct1' at drivers/media/pci/cx18/cx18-driver.c:724:8:
drivers/media/pci/cx18/cx18-driver.c:688:9: note: 'snprintf' output between 4 and 39 bytes into a destination of size 11
  688 |         snprintf(cx->in_workq_name, sizeof(cx->in_workq_name), "%s-in",
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  689 |                  cx->v4l2_dev.name);
      |                  ~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Arnd Bergmann <arnd@arndb.de>

Fixes this compiler warning:

In file included from include/linux/property.h:14,
                 from include/linux/acpi.h:16,
                 from drivers/media/pci/intel/ipu-bridge.c:4:
In function 'ipu_bridge_init_swnode_names',
    inlined from 'ipu_bridge_create_connection_swnodes' at drivers/media/pci/intel/ipu-bridge.c:445:2,
    inlined from 'ipu_bridge_connect_sensor' at drivers/media/pci/intel/ipu-bridge.c:656:3:
include/linux/fwnode.h:81:49: warning: '%u' directive output may be truncated writing between 1 and 3 bytes into a region of size 2 [-Wformat-truncation=]
   81 | #define SWNODE_GRAPH_PORT_NAME_FMT              "port@%u"
      |                                                 ^~~~~~~~~
drivers/media/pci/intel/ipu-bridge.c:384:18: note: in expansion of macro 'SWNODE_GRAPH_PORT_NAME_FMT'
  384 |                  SWNODE_GRAPH_PORT_NAME_FMT, sensor->link);
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/fwnode.h: In function 'ipu_bridge_connect_sensor':
include/linux/fwnode.h:81:55: note: format string is defined here
   81 | #define SWNODE_GRAPH_PORT_NAME_FMT              "port@%u"
      |                                                       ^~
In function 'ipu_bridge_init_swnode_names',
    inlined from 'ipu_bridge_create_connection_swnodes' at drivers/media/pci/intel/ipu-bridge.c:445:2,
    inlined from 'ipu_bridge_connect_sensor' at drivers/media/pci/intel/ipu-bridge.c:656:3:
include/linux/fwnode.h:81:49: note: directive argument in the range [0, 255]
   81 | #define SWNODE_GRAPH_PORT_NAME_FMT              "port@%u"
      |                                                 ^~~~~~~~~
drivers/media/pci/intel/ipu-bridge.c:384:18: note: in expansion of macro 'SWNODE_GRAPH_PORT_NAME_FMT'
  384 |                  SWNODE_GRAPH_PORT_NAME_FMT, sensor->link);
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/pci/intel/ipu-bridge.c:382:9: note: 'snprintf' output between 7 and 9 bytes into a destination of size 7
  382 |         snprintf(sensor->node_names.remote_port,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  383 |                  sizeof(sensor->node_names.remote_port),
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  384 |                  SWNODE_GRAPH_PORT_NAME_FMT, sensor->link);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Arnd Bergmann <arnd@arndb.de>

Fixes these compiler warnings:

drivers/media/test-drivers/vivid/vivid-rds-gen.c: In function 'vivid_rds_gen_fill':
drivers/media/test-drivers/vivid/vivid-rds-gen.c:147:56: warning: '.' directive output may be truncated writing 1 byte into a region of size between 0 and 3 [-Wformat-truncation=]
  147 |         snprintf(rds->psname, sizeof(rds->psname), "%6d.%1d",
      |                                                        ^
drivers/media/test-drivers/vivid/vivid-rds-gen.c:147:52: note: directive argument in the range [0, 9]
  147 |         snprintf(rds->psname, sizeof(rds->psname), "%6d.%1d",
      |                                                    ^~~~~~~~~
drivers/media/test-drivers/vivid/vivid-rds-gen.c:147:9: note: 'snprintf' output between 9 and 12 bytes into a destination of size 9
  147 |         snprintf(rds->psname, sizeof(rds->psname), "%6d.%1d",
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  148 |                  freq / 16, ((freq & 0xf) * 10) / 16);
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Arnd Bergmann <arnd@arndb.de>

Fixes these compiler warnings:

drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c: In function 'ia_css_debug_pipe_graph_dump_stage':
drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:2786:66: warning: '\n' directive output may be truncated writing 2 bytes into a region of size between 0 and 198 [-Wformat-truncation=]
 2786 |                                                          "%s\\n%s\\n%s",
      |                                                                  ^~~
drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:2785:49: note: 'snprintf' output between 5 and 302 bytes into a destination of size 200
 2785 |                                                 snprintf(enable_info, sizeof(enable_info),
      |                                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2786 |                                                          "%s\\n%s\\n%s",
      |                                                          ~~~~~~~~~~~~~~~
 2787 |                                                          enable_info1, enable_info2,
      |                                                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2788 |                                                          enable_info3);
      |                                                          ~~~~~~~~~~~~~
drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:2772:66: warning: '\n' directive output may be truncated writing 2 bytes into a region of size between 0 and 198 [-Wformat-truncation=]
 2772 |                                                          "%s\\n%s\\n%s",
      |                                                                  ^~~
drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:2771:49: note: 'snprintf' output between 5 and 302 bytes into a destination of size 200
 2771 |                                                 snprintf(enable_info, sizeof(enable_info),
      |                                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2772 |                                                          "%s\\n%s\\n%s",
      |                                                          ~~~~~~~~~~~~~~~
 2773 |                                                          enable_info1, enable_info2,
      |                                                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2774 |                                                          enable_info3);
      |                                                          ~~~~~~~~~~~~~
drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:2749:92: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
 2749 |                                         snprintf(enable_info, sizeof(enable_info), "%s\\n%s",
      |                                                                                            ^
drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c:2749:41: note: 'snprintf' output between 3 and 201 bytes into a destination of size 200
 2749 |                                         snprintf(enable_info, sizeof(enable_info), "%s\\n%s",
      |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2750 |                                                  enable_info1, enable_info2);
      |                                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>