Merge drm updates from Dave Airlie:
"This is the main drm pull request for 4.8.
I'm down with a cold at the moment so hopefully this isn't in too bad
a state, I finished pulling stuff last week mostly (nouveau fixes just
went in today), so only this message should be influenced by illness.
Apologies to anyone who's major feature I missed :-)
Core:
Lockless GEM BO freeing
Non-blocking atomic work
Documentation changes (rst/sphinx)
Prep for new fencing changes
Simple display helpers
Master/auth changes
Register/unregister rework
Loads of trivial patches/fixes.
New stuff:
ARM Mali display driver (not the 3D chip)
sii902x RGB->HDMI bridge
Panel:
Support for new panels
Improved backlight support
Bridge:
Convert ADV7511 to bridge driver
ADV7533 support
TC358767 (DSI/DPI to eDP) encoder chip support
i915:
BXT support enabled by default
GVT-g infrastructure
GuC command submission and fixes
BXT workarounds
SKL/BKL workarounds
Demidlayering device registration
Thundering herd fixes
Missing pci ids
Atomic updates
amdgpu/radeon:
ATPX improvements for better dGPU power control on PX systems
New power features for CZ/BR/ST
Pipelined BO moves and evictions in TTM
GPU scheduler improvements
GPU reset improvements
Overclocking on dGPUs with amdgpu
Polaris powermanagement enabled
nouveau:
GK20A/GM20B volt and clock improvements.
Initial support for GP100/GP104 GPUs, GP104 will not yet support
acceleration due to NVIDIA having not released firmware for them as of yet.
exynos:
Exynos5433 SoC with IOMMU support.
vc4:
Shader validation for branching
imx-drm:
Atomic mode setting conversion
Reworked DMFC FIFO allocation
External bridge support
analogix-dp:
RK3399 eDP support
Lots of fixes.
rockchip:
Lots of small fixes.
msm:
DT bindings cleanups
Shrinker and madvise support
ASoC HDMI codec support
tegra:
Host1x driver cleanups
SOR reworking for DP support
Runtime PM support
omapdrm:
PLL enhancements
Header refactoring
Gamma table support
arcgpu:
Simulator support
virtio-gpu:
Atomic modesetting fixes.
rcar-du:
Misc fixes.
mediatek:
MT8173 HDMI support
sti:
ASOC HDMI codec support
Minor fixes
fsl-dcu:
Suspend/resume support
Bridge support
amdkfd:
Minor fixes.
etnaviv:
Enable GPU clock gating
hisilicon:
Vblank and other fixes"
* tag 'drm-for-v4.8' of git://people.freedesktop.org/~airlied/linux: (1575 commits)
drm/nouveau/gr/nv3x: fix instobj write offsets in gr setup
drm/nouveau/acpi: fix lockup with PCIe runtime PM
drm/nouveau/acpi: check for function 0x1B before using it
drm/nouveau/acpi: return supported DSM functions
drm/nouveau/acpi: ensure matching ACPI handle and supported functions
drm/nouveau/fbcon: fix font width not divisible by 8
drm/amd/powerplay: remove enable_clock_power_gatings_tasks from initialize and resume events
drm/amd/powerplay: move clockgating to after ungating power in pp for uvd/vce
drm/amdgpu: add query device id and revision id into system info entry at CGS
drm/amdgpu: add new definition in bif header
drm/amd/powerplay: rename smum header guards
drm/amdgpu: enable UVD context buffer for older HW
drm/amdgpu: fix default UVD context size
drm/amdgpu: fix incorrect type of info_id
drm/amdgpu: make amdgpu_cgs_call_acpi_method as static
drm/amdgpu: comment out unused defaults_staturn_pro static const structure to fix the build
drm/amdgpu: enable UVD VM only on polaris
drm/amdgpu: increase timeout of IB test
drm/amdgpu: add destroy session when generate VCE destroy msg.
drm/amd: fix deadlock of job_list_lock V2
...
* proper runtime pm support for omap-ssi and ssi-protocol
* misc. fixes
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Merge tag 'hsi-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi
Pull HSI updates from Sebastian Reichel:
- proper runtime pm support for omap-ssi and ssi-protocol
- misc fixes
* tag 'hsi-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi: (24 commits)
HSI: omap_ssi: drop pm_runtime_irq_safe
HSI: omap_ssi_port: use rpm autosuspend API
HSI: omap_ssi: call msg->complete() from process context
HSI: omap_ssi_port: ensure clocks are kept enabled during transfer
HSI: omap_ssi_port: replace pm_runtime_put_sync with non-sync variant
HSI: omap_ssi_port: avoid calling runtime_pm_*_sync inside spinlock
HSI: omap_ssi_port: avoid pm_runtime_get_sync in ssi_start_dma and ssi_start_pio
HSI: omap_ssi_port: switch to threaded pio irq
HSI: omap_ssi_core: remove pm_runtime_get_sync call from tasklet
HSI: omap_ssi_core: use pm_runtime_put instead of pm_runtime_put_sync
HSI: omap_ssi_port: prepare start_tx/stop_tx for blocking pm_runtime calls
HSI: core: switch port event notifier from atomic to blocking
HSI: omap_ssi_port: replace wkin_cken with atomic bitmap operations
HSI: omap_ssi: convert cawake irq handler to thread
HSI: ssi_protocol: fix ssip_xmit invocation
HSI: ssi_protocol: replace spin_lock with spin_lock_bh
HSI: ssi_protocol: avoid ssi_waketest call with held spinlock
HSI: omap_ssi: do not reset module
HSI: omap_ssi_port: remove useless newline
hsi: Only descend into hsi directory when CONFIG_HSI is set
...
* patchwork: (1492 commits)
[media] cec: always check all_device_types and features
[media] cec: poll should check if there is room in the tx queue
[media] vivid: support monitor all mode
[media] cec: fix test for unconfigured adapter in main message loop
[media] cec: limit the size of the transmit queue
[media] cec: zero unused msg part after msg->len
[media] cec: don't set fh to NULL in CEC_TRANSMIT
[media] cec: clear all status fields before transmit and always fill in sequence
[media] cec: CEC_RECEIVE overwrote the timeout field
[media] cxd2841er: Reading SNR for DVB-C added
[media] cxd2841er: Reading BER and UCB for DVB-C added
[media] cxd2841er: fix switch-case for DVB-C
[media] cxd2841er: fix signal strength scale for ISDB-T
[media] cxd2841er: adjust the dB scale for DVB-C
[media] cxd2841er: provide signal strength for DVB-C
[media] cxd2841er: fix BER report via DVBv5 stats API
[media] mb86a20s: apply mask to val after checking for read failure
[media] airspy: fix error logic during device register
[media] s5p-cec/TODO: add TODO item
[media] cec/TODO: drop comment about sphinx documentation
...
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Move the contents of the media section at
DocBooks/DocBook/device-drivers.tmpl to a new ReST book.
For now, the contents is kept as-is. Next patches will fix
the warnings and add cross-references that were removed due to
the conversion.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Add DocBook documentation for the CEC API.
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
[k.debski@samsung.com: add documentation for passthrough mode]
[k.debski@samsung.com: minor fixes and change of reserved field sizes]
Signed-off-by: Kamil Debski <kamil@wypas.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
If the HSI core is built as a module hsi_boardinfo may still
be built-in as its Kconfig type is bool, which can cause build
issues. Fix this by building this code into the HSI core when
enabled.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
As promised, piles of prep work all around:
- drm_atomic_state rework, prep for nonblocking commit helpers
- fence patches from Gustavo and Christian to prep for atomic fences and
some cool work in ttm/amdgpu from Christian
- drm event prep for both nonblocking commit and atomic fences
- Gustavo seems on a crusade against the non-kms-native version of the
vblank functions.
- prep work from Boris to nuke all the silly ->best_encoder
implementations we have (we really only need that for truly dynamic
cases like dvi-i vs dvi-d or dp mst selecting the right transcoder on
intel)
- prep work from Laurent to rework the format handling functions
- and few small things all over
* tag 'topic/drm-misc-2016-06-07' of git://anongit.freedesktop.org/drm-intel: (47 commits)
drm/dsi: Implement set tear scanline
drm/fb_cma_helper: Implement fb_mmap callback
drm/qxl: Remove useless drm_fb_get_bpp_depth() call
drm/ast: Remove useless drm_fb_get_bpp_depth() call
drm/atomic: Fix remaining places where !funcs->best_encoder is valid
drm/core: Change declaration for gamma_set.
Documentation: add fence-array to kernel DocBook
drm/shmobile: use drm_crtc_vblank_{get,put}()
drm/radeon: use drm_crtc_vblank_{get,put}()
drm/qxl: use drm_crtc_vblank_{get,put}()
drm/atmel: use drm_crtc_vblank_{get,put}()
drm/armada: use drm_crtc_vblank_{get,put}()
drm/amdgpu: use drm_crtc_vblank_{get,put}()
drm/virtio: use drm_crtc_send_vblank_event()
drm/udl: use drm_crtc_send_vblank_event()
drm/qxl: use drm_crtc_send_vblank_event()
drm/atmel: use drm_crtc_send_vblank_event()
drm/armada: use drm_crtc_send_vblank_event()
drm/doc: Switch to sphinx/rst fixed-width quoting
drm/doc: Drop kerneldoc for static functions in drm_irq.c
...
Split out dma-buf related parts into their own section, add missing
files, and write a bit of overview about how it all fits together.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Here's the big staging and iio driver update for 4.7-rc1.
I think we almost broke even with this release, only adding a few more
lines than we removed, which isn't bad overall given that there's a
bunch of new iio drivers added. The Lustre developers seem to have
woken up from their sleep and have been doing a great job in cleaning up
the code and pruning unused or old cruft, the filesystem is almost
readable :)
Other than that, just a lot of basic coding style cleanups in the churn.
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO driver updates from Greg KH:
"Here's the big staging and iio driver update for 4.7-rc1.
I think we almost broke even with this release, only adding a few more
lines than we removed, which isn't bad overall given that there's a
bunch of new iio drivers added.
The Lustre developers seem to have woken up from their sleep and have
been doing a great job in cleaning up the code and pruning unused or
old cruft, the filesystem is almost readable :)
Other than that, just a lot of basic coding style cleanups in the
churn. All have been in linux-next for a while with no reported
issues"
* tag 'staging-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (938 commits)
Staging: emxx_udc: emxx_udc: fixed coding style issue
staging/gdm724x: fix "alignment should match open parenthesis" issues
staging/gdm724x: Fix avoid CamelCase
staging: unisys: rename misleading var ii with frag
staging: unisys: visorhba: switch success handling to error handling
staging: unisys: visorhba: main path needs to flow down the left margin
staging: unisys: visorinput: handle_locking_key() simplifications
staging: unisys: visorhba: fail gracefully for thread creation failures
staging: unisys: visornic: comment restructuring and removing bad diction
staging: unisys: fix format string %Lx to %llx for u64
staging: unisys: remove unused struct members
staging: unisys: visorchannel: correct variable misspelling
staging: unisys: visorhba: replace functionlike macro with function
staging: dgnc: Need to check for NULL of ch
staging: dgnc: remove redundant condition check
staging: dgnc: fix 'line over 80 characters'
staging: dgnc: clean up the dgnc_get_modem_info()
staging: lustre: lnet: enable configuration per NI interface
staging: lustre: o2iblnd: properly set ibr_why
staging: lustre: o2iblnd: remove last of kiblnd_tunables_fini
...
This makes it easier to share this code with any driver that needs to
manipulate the v4l2_rect datastructure.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
updates, etc.
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Merge tag 'docs-for-linus' of git://git.lwn.net/linux
Pul documentation update from Jon Corbet:
"Another relatively boring cycle for the docs tree: typo fixes,
translation updates, etc"
* tag 'docs-for-linus' of git://git.lwn.net/linux:
modsign: Fix documentation on module signing enforcement parameter.
Doc: nfs: Fix typos in Documentation/filesystems/nfs
Documentation: kselftest: Remove duplicate word
doc: fix grammar
Documentation: Howto: Fixed subtitles style
Doc: ARM: Fix a typo in clksrc-change-registers.awk
Documentation/ko_KR: update maintainer information
Documentation: Fix int/unsigned int comparison
Documentation: Chinese translation of arm64/silicon-errata.txt
Documentation:Update Documentation/zh_CN/arm64/booting.txt
Documentation: HOWTO: remove obsolete info about regression postings
Doc: ja_JP: Fix a typo in HOWTO
Doc: i2c: Fix typo in Documentation/i2c
Doc: DocBook: Fix a typo in device-drivers.tmpl
Remove "arch" usage in Documentation/features/list-arch.sh
README: cosmetic fixes
Documentation/CodingStyle: add space before parenthesis in example macro
SubmittingPatches: fix spelling of "git send-email"
This patch fix a spelling typo in device-drivers.tmpl.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The customer PC hardware can be shipped with lots of different
configurations, as vendors use to replace some of the chips on
their hardware along the time. All drivers that support such
devices are prepared to handle the hardware differences, using
their own auto-probing logic.
They do it in a way that number of inputs and outputs for a given
hardware type doesn't change.
Now that we're adding media controller capabilities to those drivers,
we need to standardize the number of inputs and outputs for each
hardware type, as we want to have a generic function at the V4L2
core that would create the links for the entities that are expected
on such hardware.
Such standard is already there for tuners, but tuner.h is not the
best place to store such data, as we'll need to add definitions also
for analog TV demodulators.
Also, we'll need a place to put a set of MC handling functions. So,
let's create a v4l2-mc.h to store such kind of definitions.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Instead of using a text file, let's put it together with the
struct documentation for the Media Controller.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This header file provides the kABI functions used by the
Digital TV Frontend core support. Add a description for
this kABI, to add at the device_drivers Kernel DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Classify the functions at the DVB core per API. That makes easier
to understand how they're related to the userspace API.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
It is better to keep the documentation overview at the header file,
as this makes easier for developers to remember to fix when needed.
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
There are several stuff at media's kdapi.xml that don't
belong there, as it documents the Kernel internal ABI, and
not the userspace API.
Add the documentation here. The hole kdapi.xml will be
removed on a latter patch, after we finish documenting
what's there at the proper places.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The DocBook/media/dvb/kdapi.xml contains the description of
the kABI for DVB. The problem is that, by being maintained
on a separate file and not being updated for years, it got
outdated. So, for example, some callback parameters were
changed, but the DocBook were still using the old stuff.
As a first step to fix it, let's move the documentation of
struct dmx_demux into demux.h and fix the parameters used
there.
For now, don't document any other field nor touch the
descriptions that got moved, letting this job to other
patches. That makes easier to review the patch.
PS.: Please notice that an additional patch will be needed
in order to fix the return values (some uses non-existent
return codes) and to the functions and callbacks mentioned at
the descriptions.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The struct lirc_driver is already documented, but on some
internal format. Convert it to Kernel doc-nano format and
add documentation for some additional parameters that are
also present at the structure.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This header declares the code and structures used to parse
Hauppauge eeproms. As this is part of the V4L2 common, and
used by several drivers, let's properly document it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The tuner-types.h is part of the V4L2 core and should be
touched for every new tuner added. So, it deserves to be
documented at the device-drivers DocBook.
Add it to device-drivers.tmpl and add descriptions for
enum param_type and struct tuner_range.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This is part of the V4L2 core, so its kABI should be
documented at device-drivers DocBook.
Add the meta-tags for that.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This set of changes introduces the beginnings of a new API that's based
around the concept of states that can be atomically applied. Drivers go
to various lengths to implement something similar, which indicates that
the core should really be providing the necessary framework.
On top of that, there is a bit of cleanup as well as improved kerneldoc
and integration into the device-drivers DocBook.
Regarding drivers there is a new one for the NXP LPC18xx family of SoCs
and a couple of fixes for existing drivers (pca9685, Broadcom Kona and
Atmel HLCDC).
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Merge tag 'pwm/for-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set of changes introduces the beginnings of a new API that's
based around the concept of states that can be atomically applied.
Drivers go to various lengths to implement something similar, which
indicates that the core should really be providing the necessary
framework.
On top of that, there is a bit of cleanup as well as improved
kerneldoc and integration into the device-drivers DocBook.
Regarding drivers there is a new one for the NXP LPC18xx family of
SoCs and a couple of fixes for existing drivers (pca9685, Broadcom
Kona and Atmel HLCDC)"
* tag 'pwm/for-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
ARM: at91: pwm: atmel-hlcdc: Add at91sam9n12 errata
pwm: Add NXP LPC18xx PWM/SCT DT binding documentation
pwm: NXP LPC18xx PWM/SCT driver
pwm-pca9685: Support changing the output frequency
pwm-pca9685: Fix several driver bugs
pwm: kona: Modify settings application sequence
pwm: pca9685: Drop owner assignment
pwm: Add to device-drivers documentation
pwm: Clean up kerneldoc
pwm: Remove useless whitespace
pwm: sysfs: Remove unnecessary padding
pwm: sysfs: Properly convert from enum to string
pwm: Make use of pwm_get_xxx() helpers where appropriate
pwm: Add pwm_get_polarity() helper function
pwm: Constify PWM device where possible
pwm: Add the pwm_is_enabled() helper
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Merge tag 'media/v4.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- new DVB frontend drivers: ascot2e, cxd2841er, horus3a, lnbh25
- new HDMI capture driver: tc358743
- new driver for NetUP DVB new boards (netup_unidvb)
- IR support for DVBSky cards (smipcie-ir)
- Coda driver has gain macroblock tiling support
- Renesas R-Car gains JPEG codec driver
- new DVB platform driver for STi boards: c8sectpfe
- added documentation for the media core kABI to device-drivers DocBook
- lots of driver fixups, cleanups and improvements
* tag 'media/v4.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (297 commits)
[media] c8sectpfe: Remove select on undefined LIBELF_32
[media] i2c: fix platform_no_drv_owner.cocci warnings
[media] cx231xx: Use wake_up_interruptible() instead of wake_up_interruptible_nr()
[media] tc358743: only queue subdev notifications if devnode is set
[media] tc358743: add missing Kconfig dependency/select
[media] c8sectpfe: Use %pad to print 'dma_addr_t'
[media] DocBook media: Fix typo "the the" in xml files
[media] tc358743: make reset gpio optional
[media] tc358743: set direction of reset gpio using devm_gpiod_get
[media] dvbdev: document most of the functions/data structs
[media] dvb_frontend.h: document the struct dvb_frontend
[media] dvb-frontend.h: document struct dtv_frontend_properties
[media] dvb-frontend.h: document struct dvb_frontend_ops
[media] dvb: Use DVBFE_ALGO_HW where applicable
[media] dvb_frontend.h: document struct analog_demod_ops
[media] dvb_frontend.h: Document struct dvb_tuner_ops
[media] Docbook: Document struct analog_parameters
[media] dvb_frontend.h: get rid of dvbfe_modcod
[media] add documentation for struct dvb_tuner_info
[media] dvb_frontend: document dvb_frontend_tune_settings
...
Document the most relevant functions and data structs for
developers that are working with the DVB subsystem.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Instead of putting all media devices on a flat structure,
split them on 4 types, just like we do with the userspace API:
Video2Linux devices
Digital TV (DVB) devices
Remote Controller devices
Media Controller devices
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Fix the format of the comments and add to DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
The comment metadata was wrong:
Warning(.//include/media/videobuf2-memops.h:25): cannot understand function prototype: 'struct vb2_vmarea_handler '
Warning(.//include/media/videobuf2-memops.h): no structured comments found
Fix and add to DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Most of the stuff at videobuf2-core are ok for adding it to
DocBook.
Two notes here:
1) As videobuf2-core will be soon be changed, better to
not spend too much efforts right now, as things will
change soon;
2) struct vb2_queue has a number of private elements that are
documented. As Kernel nano documentation format handles
"private:" arguments, we need to put them on a separate
comment block or to remove. Keeping the comments is
obviously better ;)
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
There are already markups for documentation at v4l-dv-timings.h,
however, they're not properly formatted.
Convert them to the right format and add this file to
the device-drivers DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
The comments there are good enough for DocBook, however they're
using a wrong format. Fix and add to device-drivers.xml.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
The comments there are using a wrong format. Due to that,
DocBook were unable to parse it.
Fix the tags format, and add it to device-drivers.xml.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
There are already some comments at dvb_ringbuffer.h that are ready
for DocBook, although not properly formatted.
Convert them, fix some issues and add this file to
the device-drivers DocBook.
While here, put multi-line comments on the right format.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
There are already some comments at dvb_math.h that are ready
for DocBook, although not properly formatted.
Convert them, fix some issues and add this file to
the device-drivers DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
There are already some comments at dvb_frontend.h that are ready
for DocBook, although not properly formatted.
Convert them, and add this file to the device-drivers DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
There are already some tags at dvb_ca_en50221.h, but using a
different format. Convert them, fix a few entries and add
to the device-drivers DocBook.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
There are lots of docbook marks at the media subsystem, but
those aren't used.
Add the core headers/code in order to start generating docs.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Add a short introductory text along with API documentation generated
from kerneldoc comments for the PWM framework.
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
There are some workqueue functions declared in workqueue.h, so include
that in the workqueue section of the DocBook docs.
Signed-off-by: Tim Bird <tim.bird@sonymobile.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The movement of the I2O tree into staging broke the DocBook build. Rather
than redirect the i2o references into staging, it seems better to just
remove them since this code is on its way out anyway.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Pull timer and time updates from Thomas Gleixner:
"A rather large update of timers, timekeeping & co
- Core timekeeping code is year-2038 safe now for 32bit machines.
Now we just need to fix all in kernel users and the gazillion of
user space interfaces which rely on timespec/timeval :)
- Better cache layout for the timekeeping internal data structures.
- Proper nanosecond based interfaces for in kernel users.
- Tree wide cleanup of code which wants nanoseconds but does hoops
and loops to convert back and forth from timespecs. Some of it
definitely belongs into the ugly code museum.
- Consolidation of the timekeeping interface zoo.
- A fast NMI safe accessor to clock monotonic for tracing. This is a
long standing request to support correlated user/kernel space
traces. With proper NTP frequency correction it's also suitable
for correlation of traces accross separate machines.
- Checkpoint/restart support for timerfd.
- A few NOHZ[_FULL] improvements in the [hr]timer code.
- Code move from kernel to kernel/time of all time* related code.
- New clocksource/event drivers from the ARM universe. I'm really
impressed that despite an architected timer in the newer chips SoC
manufacturers insist on inventing new and differently broken SoC
specific timers.
[ Ed. "Impressed"? I don't think that word means what you think it means ]
- Another round of code move from arch to drivers. Looks like most
of the legacy mess in ARM regarding timers is sorted out except for
a few obnoxious strongholds.
- The usual updates and fixlets all over the place"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (114 commits)
timekeeping: Fixup typo in update_vsyscall_old definition
clocksource: document some basic timekeeping concepts
timekeeping: Use cached ntp_tick_length when accumulating error
timekeeping: Rework frequency adjustments to work better w/ nohz
timekeeping: Minor fixup for timespec64->timespec assignment
ftrace: Provide trace clocks monotonic
timekeeping: Provide fast and NMI safe access to CLOCK_MONOTONIC
seqcount: Add raw_write_seqcount_latch()
seqcount: Provide raw_read_seqcount()
timekeeping: Use tk_read_base as argument for timekeeping_get_ns()
timekeeping: Create struct tk_read_base and use it in struct timekeeper
timekeeping: Restructure the timekeeper some more
clocksource: Get rid of cycle_last
clocksource: Move cycle_last validation to core code
clocksource: Make delta calculation a function
wireless: ath9k: Get rid of timespec conversions
drm: vmwgfx: Use nsec based interfaces
drm: i915: Use nsec based interfaces
timekeeping: Provide ktime_get_raw()
hangcheck-timer: Use ktime_get_ns()
...
Move the list of shared fences to a struct, and return it in
reservation_object_get_list().
Add reservation_object_get_excl to get the exclusive fence.
Add reservation_object_reserve_shared(), which reserves space
in the reservation_object for 1 more shared fence.
reservation_object_add_shared_fence() and
reservation_object_add_excl_fence() are used to assign a new
fence to a reservation_object pointer, to complete a reservation.
Changes since v1:
- Add reservation_object_get_excl, reorder code a bit.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This type of fence can be used with hardware synchronization for simple
hardware that can block execution until the condition
(dma_buf[offset] - value) >= 0 has been met when WAIT_GEQUAL is used,
or (dma_buf[offset] != 0) has been met when WAIT_NONZERO is set.
A software fallback still has to be provided in case the fence is used
with a device that doesn't support this mechanism. It is useful to expose
this for graphics cards that have an op to support this.
Some cards like i915 can export those, but don't have an option to wait,
so they need the software fallback.
I extended the original patch by Rob Clark.
v1: Original
v2: Renamed from bikeshed to seqno, moved into dma-fence.c since
not much was left of the file. Lots of documentation added.
v3: Use fence_ops instead of custom callbacks. Moved to own file
to avoid circular dependency between dma-buf.h and fence.h
v4: Add spinlock pointer to seqno_fence_init
v5: Add condition member to allow wait for != 0.
Fix small style errors pointed out by checkpatch.
v6: Move to a separate file. Fix up api changes in fences.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Rob Clark <robdclark@gmail.com> #v4
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A fence can be attached to a buffer which is being filled or consumed
by hw, to allow userspace to pass the buffer without waiting to another
device. For example, userspace can call page_flip ioctl to display the
next frame of graphics after kicking the GPU but while the GPU is still
rendering. The display device sharing the buffer with the GPU would
attach a callback to get notified when the GPU's rendering-complete IRQ
fires, to update the scan-out address of the display, without having to
wake up userspace.
A driver must allocate a fence context for each execution ring that can
run in parallel. The function for this takes an argument with how many
contexts to allocate:
+ fence_context_alloc()
A fence is transient, one-shot deal. It is allocated and attached
to one or more dma-buf's. When the one that attached it is done, with
the pending operation, it can signal the fence:
+ fence_signal()
To have a rough approximation whether a fence is fired, call:
+ fence_is_signaled()
The dma-buf-mgr handles tracking, and waiting on, the fences associated
with a dma-buf.
The one pending on the fence can add an async callback:
+ fence_add_callback()
The callback can optionally be cancelled with:
+ fence_remove_callback()
To wait synchronously, optionally with a timeout:
+ fence_wait()
+ fence_wait_timeout()
When emitting a fence, call:
+ trace_fence_emit()
To annotate that a fence is blocking on another fence, call:
+ trace_fence_annotate_wait_on(fence, on_fence)
A default software-only implementation is provided, which can be used
by drivers attaching a fence to a buffer when they have no other means
for hw sync. But a memory backed fence is also envisioned, because it
is common that GPU's can write to, or poll on some memory location for
synchronization. For example:
fence = custom_get_fence(...);
if ((seqno_fence = to_seqno_fence(fence)) != NULL) {
dma_buf *fence_buf = seqno_fence->sync_buf;
get_dma_buf(fence_buf);
... tell the hw the memory location to wait ...
custom_wait_on(fence_buf, seqno_fence->seqno_ofs, fence->seqno);
} else {
/* fall-back to sw sync * /
fence_add_callback(fence, my_cb);
}
On SoC platforms, if some other hw mechanism is provided for synchronizing
between IP blocks, it could be supported as an alternate implementation
with it's own fence ops in a similar way.
enable_signaling callback is used to provide sw signaling in case a cpu
waiter is requested or no compatible hardware signaling could be used.
The intention is to provide a userspace interface (presumably via eventfd)
later, to be used in conjunction with dma-buf's mmap support for sw access
to buffers (or for userspace apps that would prefer to do their own
synchronization).
v1: Original
v2: After discussion w/ danvet and mlankhorst on #dri-devel, we decided
that dma-fence didn't need to care about the sw->hw signaling path
(it can be handled same as sw->sw case), and therefore the fence->ops
can be simplified and more handled in the core. So remove the signal,
add_callback, cancel_callback, and wait ops, and replace with a simple
enable_signaling() op which can be used to inform a fence supporting
hw->hw signaling that one or more devices which do not support hw
signaling are waiting (and therefore it should enable an irq or do
whatever is necessary in order that the CPU is notified when the
fence is passed).
v3: Fix locking fail in attach_fence() and get_fence()
v4: Remove tie-in w/ dma-buf.. after discussion w/ danvet and mlankorst
we decided that we need to be able to attach one fence to N dma-buf's,
so using the list_head in dma-fence struct would be problematic.
v5: [ Maarten Lankhorst ] Updated for dma-bikeshed-fence and dma-buf-manager.
v6: [ Maarten Lankhorst ] I removed dma_fence_cancel_callback and some comments
about checking if fence fired or not. This is broken by design.
waitqueue_active during destruction is now fatal, since the signaller
should be holding a reference in enable_signalling until it signalled
the fence. Pass the original dma_fence_cb along, and call __remove_wait
in the dma_fence_callback handler, so that no cleanup needs to be
performed.
v7: [ Maarten Lankhorst ] Set cb->func and only enable sw signaling if
fence wasn't signaled yet, for example for hardware fences that may
choose to signal blindly.
v8: [ Maarten Lankhorst ] Tons of tiny fixes, moved __dma_fence_init to
header and fixed include mess. dma-fence.h now includes dma-buf.h
All members are now initialized, so kmalloc can be used for
allocating a dma-fence. More documentation added.
v9: Change compiler bitfields to flags, change return type of
enable_signaling to bool. Rework dma_fence_wait. Added
dma_fence_is_signaled and dma_fence_wait_timeout.
s/dma// and change exports to non GPL. Added fence_is_signaled and
fence_enable_sw_signaling calls, add ability to override default
wait operation.
v10: remove event_queue, use a custom list, export try_to_wake_up from
scheduler. Remove fence lock and use a global spinlock instead,
this should hopefully remove all the locking headaches I was having
on trying to implement this. enable_signaling is called with this
lock held.
v11:
Use atomic ops for flags, lifting the need for some spin_lock_irqsaves.
However I kept the guarantee that after fence_signal returns, it is
guaranteed that enable_signaling has either been called to completion,
or will not be called any more.
Add contexts and seqno to base fence implementation. This allows you
to wait for less fences, by testing for seqno + signaled, and then only
wait on the later fence.
Add FENCE_TRACE, FENCE_WARN, and FENCE_ERR. This makes debugging easier.
An CONFIG_DEBUG_FENCE will be added to turn off the FENCE_TRACE
spam, and another runtime option can turn it off at runtime.
v12:
Add CONFIG_FENCE_TRACE. Add missing documentation for the fence->context
and fence->seqno members.
v13:
Fixup CONFIG_FENCE_TRACE kconfig description.
Move fence_context_alloc to fence.
Simplify fence_later.
Kill priv member to fence_cb.
v14:
Remove priv argument from fence_add_callback, oops!
v15:
Remove priv from documentation.
Explicitly include linux/atomic.h.
v16:
Add trace events.
Import changes required by android syncpoints.
v17:
Use wake_up_state instead of try_to_wake_up. (Colin Cross)
Fix up commit description for seqno_fence. (Rob Clark)
v18:
Rename release_fence to fence_release.
Move to drivers/dma-buf/.
Rename __fence_is_signaled and __fence_signal to *_locked.
Rename __fence_init to fence_init.
Make fence_default_wait return a signed long, and fix wait ops too.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com> #use smp_mb__before_atomic()
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds