>From the pci power documentation:
"The driver itself should not call pm_runtime_allow(), though. Instead,
it should let user space or some platform-specific code do that (user space
can do it via sysfs as stated above)..."
However, the S0ix residency cannot be reached without MEI device getting
into low power state. Hence, for mei devices that support D0i3, it's better
to make runtime power management mandatory and not rely on the system
integration such as udev rules.
This policy cannot be applied globally as some older platforms
were found to have broken power management.
Cc: <stable@vger.kernel.org> v4.13+
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This function never fails, as it does nothing more than adding the GEM
object to the global device list. Making this explicit through the void
return type allows to drop some unnecessary error handling.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
This function has only one caller and it isn't expected that there will
be any more in the future. Folding this function into the caller is
helping the readability.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
The previous patch addressed a warning but not the cause:
drivers/slimbus/qcom-ctrl.c: In function 'qcom_slim_probe':
drivers/slimbus/qcom-ctrl.c:584:9: error: passing argument 3 of 'dmam_alloc_coherent' from incompatible pointer type [-Werror=incompatible-pointer-types]
There are two things wrong here:
- The naming is very confusing, we now have a member named 'phys'
that doesn't refer to a phys_addr_t but a dma_addr_t. If we needed
a dma address, it should be named 'dma' to avoid confusion, and
to make it less likely that someone passes it into a function that
expects a physical address.
- The dma address is not used at all at this point. It may have been
designed to support DMA in the future, but today it doesn't, so
the only effect right now is to make transfers artificially slower
by using uncached memory instead of cached memory for a temporary
buffer.
This removes the unused structure member and instead changes the code
to call devm_kcalloc(), which matches the usage of the 'base' pointer
as an array of temporary buffers.
Fixes: db809859c8 ("slimbus: qcom: fix incompatible pointer warning")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The current userptr page population will defer work to a work item if
needed to avoid ever taking the mmap_sem in the direct call path. With
the more fine-grained locking in etnaviv this isn't needed anymore, so
a future commit will simplify this code.
Add a lockdep annotation to validate the assumption that the mmap_sem
can be taken in the direct call path.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Userptr, prime and shmem buffer objects have different lock ordering
requirements. This is mostly due to the fact that we don't allow to mmap
userptr buffers, so we won't ever end up in our fault handler for those,
so some of the code paths are never called with the mmap_sem held.
To avoid lockdep false positives, split them up into different lock classes.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
If the FE is restarted before the sync point event is cleared, the GPU
might trigger a completion IRQ for the next sync point, corrupting
the state of the currently running worker.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
We store per path and per device configuration data to identify the
path or device correctly. The per path configuration data might get
mixed up if the original request gets into error recovery and is
started with a random path mask.
This would lead to a wrong identification of a path in case of a CUIR
event for example.
Fix by copying the path mask from the original request to the error
recovery request in case it is a path verification request.
Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The omap4 CEC hardware cannot tell a Nack from a Low Drive from an
Arbitration Lost error, so just report a Nack, which is almost
certainly the reason for the error anyway.
This also simplifies the implementation. The only three interrupts
that need to be enabled are:
Transmit Buffer Full/Empty Change event: triggered when the
transmit finished successfully and cleared the buffer.
Receiver FIFO Not Empty event: triggered when a message was received.
Frame Retransmit Count Exceeded event: triggered when a transmit
failed repeatedly, usually due to the message being Nacked. Other
reasons are possible (Low Drive, Arbitration Lost) but there is no
way to know. If this happens the TX buffer needs to be cleared
manually.
While testing various error conditions I noticed that the hardware
can receive messages up to 18 bytes in total, which exceeds the legal
maximum of 16. This could cause a buffer overflow, so we check for
this and constrain the size to 16 bytes.
The old incorrect interrupt handler could cause the CEC framework to
enter into a bad state because it mis-detected the "Start Bit Irregularity
event" as an ARB_LOST transmit error when it actually is a receive error
which should be ignored.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Henrik Austad <haustad@cisco.com>
Tested-by: Henrik Austad <haustad@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
We have plenty of global registers and whatnot programmed without
any further locking by the modeset code. Currently non-bocking
modesets are allowed to execute in parallel which could corrupt
said registers.
To avoid the problem let's run all non-blocking modesets on an
ordered workqueue. We still put page flips etc. to system_unbound_wq
allowing page flips on one pipe to execute in parallel with page flips
or a modeset on a another pipe (assuming no known state is shared
between them, at which point they would have been added to the same
atomic commit and serialized that way).
Blocking modesets are already serialized with each other by
connection_mutex, and thus are safe. To serialize them with
non-blocking modesets we just flush the workqueue before executing
blocking modesets.
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 94f050246b ("drm/i915: nonblocking commit")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171113133622.8593-1-ville.syrjala@linux.intel.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
(cherry picked from commit 757fffcfdf)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
The gpiod_set_transitory() function is publicly exported, and
it is expected from it to be ready for usage with optional GPIOs
on consumer's side.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This non-functional change slightly simplifies the implementation
of gpiod_to_chip() function.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The fix restores a proper validation of an input gpio desc, which
might be needed to deal with optional GPIOs correctly.
Fixes: 02e479808b ("gpio: Alter semantics of *raw* operations to actually be raw")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This driver was merged in 2011 as a tool for detecting the orientation
of a screen. The device driver assumes board file setup using the
platform data from <linux/input/gpio_tilt.h>. But no boards in the
kernel tree defines this platform data.
As I am faced with refactoring drivers to use GPIO descriptors and
pass decriptor tables from boards, or use the device tree device
drivers like these creates a serious problem: I cannot fix them and
cannot test them, not even compile-test them with a system actually
using it (no in-tree boardfile).
I suggest to delete this driver and rewrite it using device tree if
it is still in use on actively maintained systems.
I can also offer to rewrite it out of the blue using device tree if
someone promise to test it and help me iterate it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Patchwork-Id: 10133609
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
struct timeval which is part of struct input_event to maintain the event
times is not y2038 safe.
Real time timestamps are also not ideal for input_event as this time can go
backwards as noted in the patch a80b83b7b8 by John Stultz.
The patch switches the timestamps to use monotonic time from realtime time.
This is assuming no one is using absolute times from these timestamps.
The structure to maintain input events will be changed in a different
patch.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Patchwork-Id: 10118255
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This gets rid of the deprecated do_gettimeofday() call in favor
of ktime_get(), which is also more reliable as it uses monotonic
times. The code now gets a bit simpler.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076621
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
struct timeval is not y2038 safe, and what mlc->instart do is
scheduling a task in a fixed timeout, so jiffies is the
simplest choice here.
In hilse_donode(), the expires in mod_timer equals
jiffies + intimeout - (now - instart)
If we use jiffies in 'now', the expires equals
instart + intimeout
So, all we need to do is that making sure expires is a future
timestamp before passed it to mod_timer.
[arnd: slightly simplified patch further]
Link: https://lists.linaro.org/pipermail/y2038/2015-October/000937.html
Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076615
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Since mlc->lcv_t is only interested in seconds, directly using time64_t
here.
This gets rid of the deprecated do_gettimeofday() and avoids problems
with time going backwards since we now use the monotonic clocksource.
Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076611
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
df->governor is being dereferenced before it is null checked,
hence there is a potential null pointer dereference.
Notice that df->governor is being null checked at line 1004:
if (df->governor) {, which implies it might be null.
Fix this by null checking df->governor before dereferencing it.
Addresses-Coverity-ID: 1401988 ("Dereference before null check")
Fixes: bcf23c79c4 ("PM / devfreq: Fix available_governor sysfs")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Propagate the error of devfreq_add_device() in devm_devfreq_add_device()
rather than statically returning ENOMEM. This makes it slightly faster
to pinpoint the cause of a returned error.
Fixes: 8cd84092d3 ("PM / devfreq: Add resource-managed function for devfreq device")
Cc: stable@vger.kernel.org
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Exynos DRM IPP subsystem is in fact non-functional and frankly speaking
dead-code. This patch clearly marks that Exynos DRM IPP subsystem is
broken and never really functional. It will be replaced by a completely
rewritten API.
Exynos DRM IPP user-space API can be obsoleted for the following
reasons:
1. Exynos DRM IPP user-space API can be optional in Exynos DRM, so
userspace should not rely that it is always available and should have
a software fallback in case it is not there.
2. The only mode which was initially semi-working was memory-to-memory
image processing. The remaining modes (LCD-"writeback" and "output")
were never operational due to missing code (both in mainline and even
vendor kernels).
3. Exynos DRM IPP mainline user-space API compatibility for
memory-to-memory got broken very early by commit 083500baef ("drm:
remove DRM_FORMAT_NV12MT", which removed the support for tiled formats,
the main feature which made this API somehow useful on Exynos platforms
(video codec that time produced only tiled frames, to implement xvideo
or any other video overlay, one has to de-tile them for proper
display).
4. Broken drivers. Especially once support for IOMMU has been added,
it revealed that drivers don't configure DMA operations properly and in
many cases operate outside the provided buffers trashing memory around.
5. Need for external patches. Although IPP user-space API has been used
in some vendor kernels, but in such cases there were additional patches
applied (like reverting mentioned 083500baef patch) what means that
those userspace apps which might use it, still won't work with the
mainline kernel version.
We don't have time machines, so we cannot change it, but Exynos DRM IPP
extension should never have been merged to mainline in that form.
Exynos IPP subsystem and user-space API will be rewritten, so remove
current IPP core code and mark existing drivers as BROKEN.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Although header is included only once but still having an include guard
is a good practice. To avoid confusion, add SoC prefix to existing
Exynos5433 header include guard.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The DECON headers contain only defines for registers. There are no
other drivers using them so this should be put locally to the Exynos DRM
driver. Keeping headers local helps managing the code.
Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
After registration to the thermal core, sysfs will make one entry
per instance of the driver in /sys/class/thermal_zoneX and
/sys/class/hwmon/hwmonX, X being the index of the instance, all of them
having the type/name "armada_thermal".
Until now there was only one thermal zone per SoC but SoCs like Armada
A7K and Armada A8K have respectively two and three thermal zones (one
per AP and one per CP) and this number is subject to grow in the future.
Use dev_name() instead of the "armada_thermal" string to get a
meaningful name and be able to identify the thermal zones from
userspace.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The thermal core will check for sensors validity right after the
initialization callback has returned. As the initialization routine make
a reset, the sensors are not ready immediately and the core spawns an
error in the dmesg. Avoid this annoying situation by polling on the
validity bit before exiting from these routines. This also avoid the use
of blind sleeps.
Suggested-by: David Sniatkiwicz <davidsn@marvell.com>
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Update Armada thermal driver Kconfig entry as well as the driver's
MODULE_DESCRIPTION content, now that 64-bit SoCs are also supported,
eg. Armada 7K and Armada 8K.
Use the generic term "Marvell EBU Armada SoCs" instead of listing all
the supported SoCs everywhere (excepted in the Kconfig description,
where it is useful to have a list).
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The AP806 component is integrated in the Armada 8K and 7K lines of
processors.
The thermal sensor sample field on the status register is a signed
value. Extend armada_get_temp() and the driver structure to handle
signed values.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
[<miquel.raynal@free-electrons.com>: Changes when applying over the
previous patches, including the register names changes, also switched
the coefficients values to s64 instead of unsigned long to deal with
negative values and used do_div instead of the traditionnal '/']
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Three 32-bit registers are used to drive the thermal IP: control0,
control1 and status. The two control registers share the same name both
in the documentation and in the code, while the latter is referred as
"sensor" in the code. Rename this pointer to be called "status" in order
to be aligned with the documentation.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Bindings were incomplete for a long time by only exposing one of the two
available control registers. To ease the migration to the full bindings
(already in use for the Armada 375 SoC), rename the pointers for
clarification. This way, it will only be needed to add another pointer
to access the other control register when the time comes.
This avoids dangerous situations where the offset 0 of the control
area can be either one register or the other depending on the bindings
used. After this change, device trees of other SoCs could be migrated to
the "full" bindings if they may benefit from features from the
unaccessible register, without any change in the driver.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
All Armada SoCs use one bit to declare if the sensor values are valid.
This bit moves across the versions of the IP.
The method until then was to do both a shift and compare with an useless
flag of "0x1". It is clearer and quicker to directly save the value that
must be ANDed instead of the bit position and do a single bitwise AND
operation.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The mtk_thermal has some defiens which are never used within the driver.
This patch delets them.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
According to an application note from 03/2017 there is an updated formula to
calculate the temperature that better matches reality. This is implemented here.
While updating move the magic constants from cpp defines which are far above the
explaining formula to constants in the code just under the explaining comment.
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The previous commit already took care to use the right notation for
temperatures. Add correct units to all values representing temperatures in
the right notation for the rest of the file.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The description of the implemented algorithm is hardly understandable
without having the right application note side-by-side to the code.
Fix this by using shorter and more intuitive variable names, describe
their meaning and transform a single formula instead of first talking about
slope and then about "milli_Tmeas".
There are no code changes.
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
