Most of the stuff at the Digital TV frontend header file
are documented only at the Documentation. However, a few
kernel-doc markups are there, several of them with parsing
issues.

Add the missing documentation, copying definitions from the
Documentation when it applies, fixing some bugs.

Please notice that DVBv3 stuff that were deprecated weren't
commented by purpose. Instead, they were clearly tagged as
such.

This patch prepares to move part of the documentation from
Documentation/ to kernel-doc comments.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

struct dtv_cmds_h is just an ancillary struct used by the
dvb_frontend.c to internally store frontend commands.

It doesn't belong to the userspace header, nor it is used anywhere,
except inside the DVB core. So, remove it from the header.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Both CA and decoders are optional. Also, the presence or
absence has nothing to do on being a PCI card or not.

Nowadays, most hardware leaves the decoders to either the
GPU or to some ISP inside the SoC, instead of implementing
it inside the Digital TV part of the device.

So, change the wording to reflect the hardware changes.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Convergence doesn't exist anymore. The community itself maintains
the spec. Update accordingly.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The references there are only for DVB. Add missing references for
ATSC and ISDB standards.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

On several places at the introduction, a digital TV board and its
kernel support is called as DVB. The reason is simple: by the
time the document was written, there were no other digital TV
standards :-)

Modernize the specs by referring to them as Digital TV.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Using typedefs inside the Kernel is against CodingStyle, and
there's no good usage here.

Just like we did at frontend.h, at commit 0df289a2
("[media] dvb: Get rid of typedev usage for enums"), let's keep
those typedefs only to provide userspace backward compatibility.

No functional changes.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Using typedefs inside the Kernel is against CodingStyle, and
there's no good usage here.

Just like we did at frontend.h, at commit 0df289a2 ("[media] dvb:
Get rid of typedev usage for enums"), let's keep those typedefs only
to provide userspace backward compatibility.

No functional changes.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Move the calculation to where it is needed, so the result doesn't
need to be stored in the device struct.
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Prefer using accessor functions so we are not dependent on the ktime_t
type.
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Prefer using accessor functions so we are not dependent on the ktime_t
type.
Signed-off-by: NJasmin Jessich <jasmin@anw.at>
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

When devm_clk_get() fails we should return the real error code
instead of always returning -ENODEV.

This allows defer probe to happen in the case the clock provider has
not been enabled by the time max2175 driver gets probed.
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Add two new model numbers to suppress this message in kernel log:
  cx23885: cx23885[0]: warning: unknown hauppauge model #121029

Add these model numbers:
* Model 121019 - WinTV-HVR4400
* Model 121029 - WinTV-HVR5500

For WinTV-HVR4400 the documentation and my hardware differ:

Documentation says it supports DVB-S/S2 and DVB-T,
but my hardware also supports DVB-C.
Signed-off-by: NMatthias Schwarzott <zzam@gentoo.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The I2C core always reports a MODALIAS of the form i2c:<foo> even if the
device was registered via OF, and the driver is only exporting the OF ID
table entries as module aliases.

So if the driver is built as module, autoload won't work since udev/kmod
won't be able to match the registered OF device with its driver module.

Before this patch:

$ modinfo drivers/media/i2c/adv748x/adv748x.ko | grep alias
alias:          of:N*T*Cadi,adv7482C*
alias:          of:N*T*Cadi,adv7482
alias:          of:N*T*Cadi,adv7481C*
alias:          of:N*T*Cadi,adv7481

After this patch:

modinfo drivers/media/i2c/adv748x/adv748x.ko | grep alias
alias:          of:N*T*Cadi,adv7482C*
alias:          of:N*T*Cadi,adv7482
alias:          of:N*T*Cadi,adv7481C*
alias:          of:N*T*Cadi,adv7481
alias:          i2c:adv7482
alias:          i2c:adv7481
Signed-off-by: NJavier Martinez Canillas <javierm@redhat.com>
Reviewed-by: NKieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

I ran into a rare build error during randconfig testing:

drivers/staging/media/imx/imx-media-capture.o: In function `capture_stop_streaming':
imx-media-capture.c:(.text+0x224): undefined reference to `vb2_buffer_done'
drivers/staging/media/imx/imx-media-capture.o: In function `imx_media_capture_device_register':
imx-media-capture.c:(.text+0xe60): undefined reference to `vb2_queue_init'
imx-media-capture.c:(.text+0xfa0): undefined reference to `vb2_dma_contig_memops'

While VIDEOBUF2_DMA_CONTIG was already selected by the camera driver,
it wasn't necessarily there with just the base driver enabled.
This moves the 'select' statement to the top-level option to make
sure it's always available.

Fixes: 64b5a49d ("[media] media: imx: Add Capture Device Interface")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Reviewed-by: NSteve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

dvb_usb_device_description structures are only used during a copy
operation. Therefore, declare them as const.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

If the PLP given is NO_STREAM_ID_FILTER (~0u) don't try to set that into the PLP register. Set PLP to 0 instead.
Signed-off-by: NOlli Salonen <olli.salonen@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

If the PLP given is NO_STREAM_ID_FILTER (~0u) don't try to set that into the PLP register. Set PLP to 0 instead.
Signed-off-by: NOlli Salonen <olli.salonen@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

GIT_AUTHOR_NAME=Colin King
GIT_AUTHOR_EMAIL=colin.king@canonical.com

In a previous commit, we added FE_NONE as an unknown fe_status.
Initialize variable s to FE_NONE instead of the more opaque value 0.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NShuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Recently added FE_NONE to the enum fe_status, so update the
documentation accordingly.

[mchehab@s-opensource.com: change description to actually
 reflect what FE_NONE means: no lock of any kind]
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The fe_status variable s is not initialized meaning it can have any
random garbage status.  This could be problematic if fe->ops.tune is
false as s is not updated by the call to fe->ops.tune() and a
subsequent check on the change status will using a garbage value.
Fix this by adding FE_NONE to the enum fe_status and initializing
s to this.

Detected by CoverityScan, CID#112887 ("Uninitialized scalar variable")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NShuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Do some minor editorial changes to make this chapter visually
better, and the example a little bit clearer.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The description of the DVBv5 API was written a long time ago,
where the API was still new, and there were not apps using it.

Now that the API is stable and used by new applications, clarify
that DVBv3 calls should not be used and why.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The ATSC 3.0 uses MPEG Media Transport, with is not currently
supported. Yet, we'll need to implement it sooner or later.
So, mention about it at the specs.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The description of what SEC means fits well as a footnote.
That makes the need of saying that SEC is only for Satellite
when it was mentioned, as the footnote already says that.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The introduction for the frontend chapter is not quite
correct:
  - it tells that it supports only three types of
    delivery systems, in opposite to three *groups*;
  - It adds ISDB-C to the list of supported systems,
    but, this is not true.

Fix it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The device numbering for DVB uses "M" and "N" as vars for the
number of the device, but sometimes this is printed using normal
font instead of verbatim.

While here, remove an extra space after quotation marks.

This is a minor cleanup with no changes at the text.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written !…

Thus fix the affected source code places.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make this const as it is only used in a copy operation.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make these const as they are only used in a copy operation.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

This function is broken.  It sets the wrong front_end to NULL.  But it's
not used, so let's just delete it.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The dib9000_remove_slave_frontend() function isn't used.

I was reviewing it because my static checker claims it writes one
element beyond the end of the array.  That's a false positive.  What it
actually does is, if there are two or more front ends, then it prints a
debug message to say that it removed the first one, stored in
state->fe[1], and then it "removes" (scare quotes on purpose) the second
one, stored in state->fe[2].  Deleting a front end from the middle is
not really supported and breaks code like dib9000_release() which
assumes the first NULL front end marks the end of the list.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make this const as it is only stored in a const field of a
video_device structure.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make this const as it is only stored in a const field of a
video_device structure.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make this const as it is only stored in a const field of a
video_device structure.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make these const as they are only used during a copy operation.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Acked-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make these const as they are either used during a copy operation or
passed to a const argument of the function cx88_vdev_init.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Make these const as they are only used during a copy operation.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
@@
static struct video_device s = {...};

@ref@
position p;
identifier match.s;
@@
s@p

@good1@
identifier match.s;
expression list[3] es;
position ref.p;
@@
cx88_vdev_init(es,&s@p,...)

@good2@
position ref.p;
identifier match.s,f,c;
expression e;
@@
(
e = s@p
|
e = s@p.f
|
c(...,s@p.f,...)
|
c(...,s@p,...)
)

@bad depends on  !good1 && !good2@
position ref.p;
identifier match.s;
@@
s@p

@depends on forall !bad disable optional_qualifier@
identifier match.s;
@@
static
+ const
struct video_device s;
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>