This ioctl seems to be some attempt to support a feature
at the bt8xx dst_ca driver. Yet, as said there, it
"needs more work". Right now, the code there is just
a boilerplate.
At the end of the day, no driver uses this ioctl, nor it is
documented anywhere (except for "needs more work").
So, get rid of it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Due to a mistake, the DVB net chapter was actually broken
into two different chapters. Fix it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The demux documentation is pretty poor nowadays: most of the
structs and enums aren't documented at all.
Add proper kernel-doc markups for them and use it.
Now, the demux API data structures are fully documented :-)
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This seems to be a pure fictional API :-)
It only exists at the DVB book, with no code implemeting it.
So, just get rid of it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
There's no driver currently using it; it is also not
documented about what it would be supposed to do.
So, get rid of it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
There's a flag defined for Digital TV demux that is not used
anywhere, called DMX_KERNEL_CLIENT. Get rid of it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Several frontend properties are specific to a subset of the
delivery systems. Make it clearer when describing each
property.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Now that frontend.h contains most documentation for the frontend,
remove the duplicated information from Documentation/ and use the
kernel-doc auto-generated one instead.
That should simplify maintainership of DVB frontend uAPI, as most
of the documentation will stick with the header file.
Signed-off-by: Mauro 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: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The references there are only for DVB. Add missing references for
ATSC and ISDB standards.
Signed-off-by: Mauro 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: Mauro 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: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro 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: Mauro 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: Mauro 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: Mauro 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: Mauro 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: Mauro 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: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some CSI-2 transmitters will finish an ongoing frame whereas others will
not. Document that receiver drivers should not assume a particular
behaviour but to work in both cases.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Document DT bindings for Analog Devices as3645a flash LED controller which
also supports an indicator LED.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Sphinx 1.6 generates some LaTeX code before each table,
starting its own environment before calling tabulary,
apparently to improve table layout.
The problem is that such environment is incompatible with
adjustbox. While, in thesis, it should be possible to override
it or to redefine tabulary, I was unable to produce such patch.
Also, that would likely break on some future Sphinx version.
So, instead, let's just change the font size on bigger tables,
in order for them to fit into the page size. That is not as
good as adjustbox, and require some manual work, but it should
be less sensitive to Sphinx changes.
While here, adjust a few other tables whose text is exceeding
the cell boundaries.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Update the Qualcomm Camera Subsystem driver document with a media
controller pipeline graph diagram.
Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Update Qualcomm Camera Subsystem driver document for the PIX interface
and format conversion support.
Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
These formats are compressed 12-bit raw bayer formats with four different
pixel orders. They are similar to 10-bit variants. The formats added by
this patch are
V4L2_PIX_FMT_SBGGR12P
V4L2_PIX_FMT_SGBRG12P
V4L2_PIX_FMT_SGRBG12P
V4L2_PIX_FMT_SRGGB12P
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Dongwoon DW9714 is a voice coil lens driver.
Also add a vendor prefix for Dongwoon for one did not exist previously.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
It adds the dt-bindings document for ZTE ZX IRDEC remote control
block.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Document the device tree bindings for the GPIO IR Bit Banging
Transmitter.
Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Document the device tree bindings for the PWM IR Transmitter.
Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Document the devicetree bindings for CIR on MediaTek MT7622
SoC.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The CEC_EVENT_PIN_LOW/HIGH defines and the cec_queue_pin_event() function
did not specify that these were about CEC pin events.
Since in the future there will also be HPD pin events it is wise to rename
the event defines and function to CEC_EVENT_PIN_CEC_LOW/HIGH and
cec_queue_pin_cec_event() now before these become part of the ABI.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The Amlogic SoCs embeds a standalone CEC Controller, this patch adds this
device bindings.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The description of how messages are processed by the core was not
always very clear. Reword it to improve this.
In particular for the USER_CONTROL_* messages a critical bit was
missing in that the core also checks for the CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU
flag. This was confusing.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
`CEC_LOG_ADDRS_FL_CDC_ONLY` should be ``CEC_LOG_ADDRS_FL_CDC_ONLY``.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Various references to open() et al were wrong. Fix this so following
the link will get you to the correct place.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Make note of the different luminance ranges between HDR and SDR.
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Add a note stating that bt.2020 is often used in combination with the
smpte 2084 transfer function.
Also use the right references to the documentation of that transfer
function.
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
After the DocBook conversion a number of pixfmt description files just
had a number in the filename (pix-fmt-004, 006, etc) which was not very
descriptive.
Rename them.
Note that pixfmt-008.rst was folded into colorspaces-details.rst, so
that file is deleted. It's easier to maintain that way.
Also moved the colorspace sections to the end of the chapter. The old
order was weird: the "Standard Image Formats" section (an intro into
pixel formats) was followed by the colorspace sections instead of the
pixel format descriptions.
Moving it to the end resolved that issue.
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
-----BEGIN PGP SIGNATURE-----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=wQ04
-----END PGP SIGNATURE-----
Merge tag 'media/v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"This series is larger than I would like to submit for -rc4. My
original intent were to sent it to either -rc2 or -rc3. Unfortunately,
due to my vacations, I got a lot of pending stuff after my return, and
had to do some biz trips, with prevented me to send this earlier.
Several fixes:
- some fixes at atomisp staging driver
- several gcc 7 warning fixes
- cleanup media SVG files, in order to fix PDF build on some distros
- fix random Kconfig build of venus driver
- some fixes for the venus driver
- some changes from semaphone to mutex in ngene's driver
- some locking fixes at dib0700 driver
- several fixes on ngene's driver and frontends to make it properly
support some new boards added on Kernel 4.13
- some fixes to CEC drivers
- omap_vout: vrfb: convert to dmaengine
- docs-rst: document EBUSY for VIDIOC_S_FMT
Please notice that the big diffstat changes here are at the SVG files.
Visually, the images look the same, but the file size is now a lot
smaller than before, and they don't use some XML tags that would cause
them to be badly parsed by some ImageMagick versions, or to require a
lot of memory by TeTex, with would break PDF output on some
distributions"
* tag 'media/v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (68 commits)
media: atomisp2: array underflow in imx_enum_frame_size()
media: atomisp2: array underflow in ap1302_enum_frame_size()
media: atomisp2: Array underflow in atomisp_enum_input()
media: platform: davinci: drop VPFE_CMD_S_CCDC_RAW_PARAMS
media: platform: davinci: return -EINVAL for VPFE_CMD_S_CCDC_RAW_PARAMS ioctl
media: venus: don't abuse dma_alloc for non-DMA allocations
media: venus: hfi: fix error handling in hfi_sys_init_done()
media: venus: fix compile-test build on non-qcom ARM platform
media: venus: mark PM functions as __maybe_unused
media: cec-notifier: small improvements
media: pulse8-cec: persistent_config should be off by default
media: cec: cec_transmit_attempt_done: ignore CEC_TX_STATUS_MAX_RETRIES
media: staging: atomisp: array underflow in ioctl
media: lirc: LIRC_GET_REC_RESOLUTION should return microseconds
media: svg: avoid too long lines
media: svg files: simplify files
media: selection.svg: simplify the SVG file
media: vimc: set id_table for platform drivers
media: staging: atomisp: disable warnings with cc-disable-warning
media: davinci: variable 'common' set but not used
...
- LP87565: set the proper output level for direction_output.
- stm32: fix the kernel build by selecting the hierarchical
irqdomain symbol properly - this happens to be done in the
pin control framework but whatever, it had dependencies to
GPIO so we need to apply it here.
- Select the hierarchical IRQ domain also for Xgene.
- Fix wakeups to work on MXC.
- Fix up the device tree binding on Exar that went astray,
also add the right bindings.
- Fix the unwanted events for edges from the library.
- Fix the unbalanced chanined IRQ on the Tegra.
-----BEGIN PGP SIGNATURE-----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=0ZOK
-----END PGP SIGNATURE-----
Merge tag 'gpio-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
- LP87565: set the proper output level for direction_output.
- stm32: fix the kernel build by selecting the hierarchical irqdomain
symbol properly - this happens to be done in the pin control
framework but whatever, it had dependencies to GPIO so we need to
apply it here.
- Select the hierarchical IRQ domain also for Xgene.
- Fix wakeups to work on MXC.
- Fix up the device tree binding on Exar that went astray, also add the
right bindings.
- Fix the unwanted events for edges from the library.
- Fix the unbalanced chanined IRQ on the Tegra.
* tag 'gpio-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: tegra: fix unbalanced chained_irq_enter/exit
gpiolib: skip unwanted events, don't convert them to opposite edge
gpio: exar: Use correct property prefix and document bindings
gpio: gpio-mxc: Fix: higher 16 GPIOs usable as wake source
gpio: xgene-sb: select IRQ_DOMAIN_HIERARCHY
pinctrl: stm32: select IRQ_DOMAIN_HIERARCHY instead of depends on
gpio: lp87565: Set proper output level and direction for direction_output
MAINTAINERS: Add entry for Whiskey Cove PMIC GPIO driver
This comes a bit later than I planned, and as a consequence is a larger
than it should be.
Most of the changes are devicetree fixes, across lots of platforms:
Renesas, Samsung Exynos, Marvell EBU, TI OMAP, Rockchips, Amlogic Meson,
Sigma Desings Tango, Allwinner SUNxi and TI Davinci.
Also across many platforms, I applied an older series of simple randconfig
build fixes. This includes making the CONFIG_MTD_XIP option compile again,
which had been broken for many years and probably has not been missed, but
it felt wrong to just remove it completely.
The only other changes are:
- We enable HWSPINLOCK in defconfig to get some Qualcomm boards
to work out of the box.
- A few regression fixes for Texas Instruments OMAP2+.
- A boot regression fix for the Renesas regulator quirk.
- A suspend/resume fix for Uniphier SoCs, fixing the resume of the
system bus.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=a2dO
-----END PGP SIGNATURE-----
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"This comes a bit later than I planned, and as a consequence is a
larger than it should be.
Most of the changes are devicetree fixes, across lots of platforms:
Renesas, Samsung Exynos, Marvell EBU, TI OMAP, Rockchips, Amlogic
Meson, Sigma Desings Tango, Allwinner SUNxi and TI Davinci.
Also across many platforms, I applied an older series of simple
randconfig build fixes. This includes making the CONFIG_MTD_XIP option
compile again, which had been broken for many years and probably has
not been missed, but it felt wrong to just remove it completely.
The only other changes are:
- We enable HWSPINLOCK in defconfig to get some Qualcomm boards to
work out of the box.
- A few regression fixes for Texas Instruments OMAP2+.
- A boot regression fix for the Renesas regulator quirk.
- A suspend/resume fix for Uniphier SoCs, fixing the resume of the
system bus"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (43 commits)
ARM: dts: tango4: Request RGMII RX and TX clock delays
bus: uniphier-system-bus: set up registers when resuming
ARM64: dts: marvell: armada-37xx: Fix the number of GPIO on south bridge
ARM: shmobile: rcar-gen2: Fix deadlock in regulator quirk
arm64: defconfig: enable missing HWSPINLOCK
ARM: pxa: select both FB and FB_W100 for eseries
ARM: ixp4xx: fix ioport_unmap definition
ARM: ep93xx: use ARM_PATCH_PHYS_VIRT correctly
ARM: mmp: mark usb_dma_mask as __maybe_unused
ARM: omap2: mark unused functions as __maybe_unused
ARM: omap1: avoid unused variable warning
ARM: sirf: mark sirfsoc_init_late as __maybe_unused
ARM: ixp4xx: use normal prototype for {read,write}s{b,w,l}
ARM: omap1/ams-delta: warn about failed regulator enable
ARM: rpc: rename RAM_SIZE macro
ARM: w90x900: normalize clk API
ARM: ep93xx: normalize clk API
ARM: dts: sun8i: a83t: Switch to CCU device tree binding macros
arm64: allwinner: sun50i-a64: Correct emac register size
ARM: dts: sunxi: h3/h5: Correct emac register size
...