Immutable branch between pdx86 simatic branch and LED due for the v6.6 merge window
ib-pdx86-simatic-v6.6-2: v6.5-rc1 + ib-pdx86-simatic-v6.6 +
more recent pdx86 simatic-ipc patches for merging into
the LED subsystem for v6.6.
Siemens Simatic Industrial PCs can monitor the voltage of the CMOS
battery with two bits that indicate low or empty state. This can be GPIO
or PortIO based.
Here we model that as a hwmon voltage. The core driver does the PortIO
and provides boilerplate for the GPIO versions. Which are split out to
model runtime dependencies while allowing fine-grained kernel
configuration.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230706154831.19100-3-henning.schild@siemens.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
The added platform_driver support fails to link when I2C core support is
not rechable:
x86_64-linux-ld: drivers/platform/x86/lenovo-yogabook.o: in function `yogabook_pdev_probe':
lenovo-yogabook.c:(.text+0x5a5): undefined reference to `i2c_bus_type'
Add a Kconfig dependency to enforce a working configuration.
Fixes: 6df1523fa0 ("platform/x86: lenovo-yogabook: Add platform driver support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20230519082606.375471-1-arnd@kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This WMI driver for the tablet mode control switch for Lenovo Yoga
notebooks was originally written by Gergo Koteles. The mode is mapped to
a SW_TABLET_MODE switch capable input device.
Andrew followed the suggestions that were posted in reply to Gergo's RFC
patch, and on the v1 & v2 versions of this patch to follow-up and get it
merged.
Changes from Gergo's RFC:
- Refactored obtaining a reference to the EC ACPI device needed for the
quirk implementation as suggested by Hans de Goede
- Applied small fixes and switched to always registering handles with
the driver for automatic cleanup as suggested by Barnabás Pőcze.
- Merged the lenovo_ymc_trigger_ec function with the
ideapad_trigger_ymc_next_read function since it was no longer
external.
- Added the word "Tablet" to the driver description to hopefully make
it more clear.
- Fixed the LENOVO_YMC_QUERY_METHOD ID and the name string for the EC
APCI device trigged for the quirk
- Triggered the input event on probe so that the initial tablet mode
state when the driver is loaded is reported to userspace as suggested
by Armin Wolf.
- Restricted the permissions of the ec_trigger parameter as suggested
by Armin Wolf. Also updated the description.
We have tested this on the Yoga 7 14AIL7 for the non-quirk path and on
the Yoga 7 14ARB7 which has the firmware bug that requires triggering
the embedded controller to send the mode change events. This workaround
is also used by the Windows drivers.
According to reports at https://github.com/lukas-w/yoga-usage-mode,
which uses the same WMI devices, the following models should also work:
Yoga C940, Ideapad flex 14API, Yoga 9 14IAP7, Yoga 7 14ARB7, etc.
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Co-developed-by: Andrew Kallmeyer <kallmeyeras@gmail.com>
Signed-off-by: Andrew Kallmeyer <kallmeyeras@gmail.com>
Link: https://lore.kernel.org/r/20221004214332.35934-1-soyer@irl.hu/
Link: https://lore.kernel.org/r/20230310041726.217447-1-kallmeyeras@gmail.com/
Link: https://lore.kernel.org/r/20230323025200.5462-1-kallmeyeras@gmail.com/
Tested-by: André Apitzsch <git@apitzsch.eu>
Link: https://lore.kernel.org/r/20230329014559.44494-3-kallmeyeras@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
On some MacBooks both the apple_bl and the apple-gmux backlight drivers
may be able to export a /sys/class/backlight device.
To avoid having 2 backlight devices for one LCD panel until now
the apple-gmux driver has been calling apple_bl_unregister() to move
the apple_bl backlight device out of the way when it loads.
Similar problems exist on other x86 laptops and all backlight drivers
which may be used on x86 laptops have moved to using
acpi_video_get_backlight_type() to determine whether they should load
or not.
Switch apple_bl to this model too, so that it is consistent with all
the other x86 backlight drivers.
Besides code-simplification and consistency this has 2 other benefits:
1) It removes a race during boot where userspace will briefly see
an apple_bl backlight and then have it disappear again, leading to e.g.:
https://bbs.archlinux.org/viewtopic.php?id=269920
2) This allows user to switch between the drivers by passing
acpi_backlight=apple_gmux or acpi_backlight=vendor on the kernel
commandline.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230307120540.389920-1-hdegoede@redhat.com
The Peaq C1010 tablet has a special "Dolby" button. This button has
a WMI interface, but this is broken in several ways:
1. It only supports polling
2. The value read on polling goes from 0 -> 1 for one poll on both edges
of the button, with no way to tell which edge causes the poll to
return 1.
3. It uses a non unique GUID (it uses the Microsoft docs WMI example GUID).
There currently is a WMI driver for this, but it uses several kludges
to work around these issues and is not entirely reliable due to 2.
Replace the unreliable WMI driver by using the x86-android-tablets code
to instantiate a gpio_keys device for this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20230301092331.7038-11-hdegoede@redhat.com
The purpose of this patch is to provide a central location where all
HP related drivers are found. HP drivers will recide under
drivers/platform/x86/hp directory.
Introduce changes to Kconfig file to list all HP driver under "HP X86
Platform Specific Device Drivers" menu option. Additional changes
include update MAINTAINERS file to indicate hp related drivers new
path.
Signed-off-by: Jorge Lopez <jorge.lopez2@hp.com>
Link: https://lore.kernel.org/r/20221020201033.12790-2-jorge.lopez2@hp.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit adds the ACPI battery hook which in turns adds the sysfs
entries.
Because the Toshiba laptops only support two modes (eco or normal), which
in testing correspond to 80% and 100% we simply round to the nearest
possible level when set.
It is possible that Toshiba laptops other than the Z830 has different set
points for the charging. If so, a quirk table could be introduced in the
future for this. For now, assume that all laptops that support this feature
work the same way.
Tested on a Toshiba Satellite Z830.
Signed-off-by: Arvid Norlander <lkml@vorpal.se>
Link: https://lore.kernel.org/r/20220902180037.1728546-3-lkml@vorpal.se
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Add an acpi_video_get_backlight_type() == acpi_backlight_nvidia_wmi_ec
check. This will make nvidia-wmi-ec-backlight properly honor the user
selecting a different backlight driver through the acpi_backlight=...
kernel commandline option.
Since the auto-detect code check for nvidia-wmi-ec-backlight in
drivers/acpi/video_detect.c already checks that the WMI advertised
brightness-source is the embedded controller, this new check makes it
unnecessary for nvidia_wmi_ec_backlight_probe() to check this itself.
Suggested-by: Daniel Dadap <ddadap@nvidia.com>
Reviewed-by: Daniel Dadap <ddadap@nvidia.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
In some new ASUS devices, hotkey Fn+F13 is used for mic mute. If mic-mute
LED is present by checking WMI ASUS_WMI_DEVID_MICMUTE_LED, we will add a
mic-mute LED classdev, asus::micmute, in the asus-wmi driver to control
it. The binding of mic-mute LED controls will be swithched with LED
trigger.
Signed-off-by: PaddyKP_Yao <PaddyKP_Yao@asus.com>
Link: https://lore.kernel.org/r/20220711115125.2072508-1-PaddyKP_Yao@asus.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
On some Panasonic models the volume up/down/mute keypresses get
reported both through the Panasonic ACPI HKEY interface as well as
through the atkbd device.
Filter out the atkbd scan-codes for these to avoid reporting presses
twice.
Note normally we would leave the filtering of these to userspace by mapping
the scan-codes to KEY_UNKNOWN through /lib/udev/hwdb.d/60-keyboard.hwdb.
However in this case that would cause regressions since we were filtering
the Panasonic ACPI HKEY events before, so filter these in the kernel.
Fixes: ed83c91718 ("platform/x86: panasonic-laptop: Resolve hotkey double trigger bug")
Reported-and-tested-by: Stefan Seyfried <seife+kernel@b1-systems.com>
Reported-and-tested-by: Kenneth Chan <kenneth.t.chan@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220624112340.10130-7-hdegoede@redhat.com
The def_bool y PMC_ATOM Kconfig option provides a couple of symbols used
by the code enabled by the X86_INTEL_LPSS option and it registers some
clocks. These clocks are only registered on Bay Trail, Cherry Trail and
Brasswell Intel SoCs and kernels targeting these SoCs must always have
the X86_INTEL_LPSS option enabled otherwise many things will not work.
Building the PMC_ATOM code on kernels which are not targeting the
mentioned SoCs and which do not have the X86_INTEL_LPSS enabled is
not useful.
This means that we can simplify things by replacing the PMC_ATOM Kconfig
option in Makefiles with X86_INTEL_LPSS and then drop the option.
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20220503140207.101218-2-hdegoede@redhat.com
Recent Fam19h EPYC server line of processors from AMD support system
management functionality via HSMP (Host System Management Port) interface.
The Host System Management Port (HSMP) is an interface to provide
OS-level software with access to system management functions via a
set of mailbox registers.
More details on the interface can be found in chapter
"7 Host System Management Port (HSMP)" of the following PPR
https://www.amd.com/system/files/TechDocs/55898_B1_pub_0.50.zip
This patch adds new amd_hsmp module under the drivers/platforms/x86/
which creates miscdevice with an IOCTL interface to the user space.
/dev/hsmp is for running the hsmp mailbox commands.
Signed-off-by: Suma Hegde <suma.hegde@amd.com>
Signed-off-by: Naveen Krishna Chatradhi <nchatrad@amd.com>
Reviewed-by: Carlos Bilbao <carlos.bilbao@amd.com>
Acked-by: Song Liu <song@kernel.org>
Reviewed-by: Nathan Fontenot <nathan.fontenot@amd.com>
Link: https://lore.kernel.org/r/20220222050501.18789-1-nchatrad@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Add support for spi bus in serial-multi-instantiate driver
Some peripherals can have either a I2C or a SPI connection
to the host (but not both) but use the same HID for both
types. So it is not possible to use the HID to determine
whether it is I2C or SPI. The driver must check the node
to see if it contains I2cSerialBus or SpiSerialBus entries.
For backwards-compatibility with the existing nodes I2C is
checked first and if such entries are found ONLY I2C devices
are created. Since some existing nodes that were already
handled by this driver could also contain unrelated
SpiSerialBus nodes that were previously ignored, and this
preserves that behavior. If there is ever a need to handle
a node where both I2C and SPI devices must be instantiated
this can be added in future.
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220121172431.6876-8-sbinding@opensource.cirrus.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Pull x86 platform driver updates from Hans de Goede:
"Highlights:
New drivers:
- asus-tf103c-dock
- intel_crystal_cove_charger
- lenovo-yogabook-wmi
- simatic-ipc platform-code + led driver + watchdog driver
- x86-android-tablets (kernel module to workaround DSDT bugs on
these)
amd-pmc:
- bug-fixes
- smar trace buffer support
asus-wmi:
- support for custom fan curves
int3472 (camera info ACPI object for Intel IPU3/SkyCam cameras):
- ACPI core + int3472 changes to delay enumeration of camera sensor
I2C clients until the PMIC for the sensor has been fully probed
- Add support for board data (DSDT info is incomplete) for setting up
the tps68470 PMIC used on some boards with these cameras
- Add board data for the Microsoft Surface Go (original, v2 and v3)
thinkpad_acpi:
- various cleanups
- support for forced battery discharging (for battery calibration)
- support to inhibit battery charging
- this includes power_supply core changes to add new APIs for this
think_lmi:
- enhanced BIOS password support
various other small fixes and hardware-id additions"
* tag 'platform-drivers-x86-v5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (78 commits)
power: supply: Provide stubs for charge_behaviour helpers
platform/x86: x86-android-tablets: Fix GPIO lookup leak on error-exit
platform/x86: int3472: Add board data for Surface Go 3
platform/x86: Add Asus TF103C dock driver
platform/x86: x86-android-tablets: Add TM800A550L data
platform/x86: x86-android-tablets: Add Asus MeMO Pad 7 ME176C data
platform/x86: x86-android-tablets: Add Asus TF103C data
platform/x86: x86-android-tablets: Add support for preloading modules
platform/x86: x86-android-tablets: Add support for registering GPIO lookup tables
platform/x86: x86-android-tablets: Add support for instantiating serdevs
platform/x86: x86-android-tablets: Add support for instantiating platform-devs
platform/x86: x86-android-tablets: Add support for PMIC interrupts
platform/x86: x86-android-tablets: Don't return -EPROBE_DEFER from a non probe() function
platform/x86: touchscreen_dmi: Remove the Glavey TM800A550L entry
platform/x86: touchscreen_dmi: Enable pen support on the Chuwi Hi10 Plus and Pro
platform/x86: touchscreen_dmi: Correct min/max values for Chuwi Hi10 Pro (CWI529) tablet
platform/x86: Add intel_crystal_cove_charger driver
power: supply: fix charge_behaviour attribute initialization
platform/x86: intel-uncore-frequency: use default_groups in kobj_type
x86/platform/uv: use default_groups in kobj_type
...
Add a driver for the keyboard, touchpad and USB port of
the keyboard dock for the Asus TF103C 2-in-1 tablet.
This keyboard dock has its own I2C attached embedded controller
and the keyboard and touchpad are also connected over I2C,
instead of using the usual USB connection. This means that the
keyboard dock requires this special driver to function.
Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Cc: Ion Agorria <ion@agorria.com>
Cc: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211226141849.156407-1-hdegoede@redhat.com
x86 tablets which ship with Android as (part of) the factory image
typically have various problems with their DSDTs. The factory kernels
shipped on these devices typically have device addresses and GPIOs
hardcoded in the kernel, rather then specified in their DSDT.
With the DSDT containing a random collection of devices which may or
may not actually be present as well as missing devices which are
actually present.
This driver, which loads only on affected models based on DMI matching,
adds DMI based instantiating of kernel devices for devices which are
missing from the DSDT, fixing e.g. battery monitoring, touchpads and/or
accelerometers not working.
Note the Kconfig help text also refers to "various fixes" ATM there are
no such fixes, but there are also known cases where entries are present
in the DSDT but they contain bugs, such as missing/wrong GPIOs. The plan
is to also add fixes for things like this here in the future.
This is the least ugly option to get these devices to fully work and to
do so without adding any extra code to the main kernel image (vmlinuz)
when built as a module.
Link: https://lore.kernel.org/platform-driver-x86/20211031162428.22368-1-hdegoede@redhat.com/
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211223190750.397487-1-hdegoede@redhat.com
This mainly implements detection of these devices and will allow
secondary drivers to work on such machines.
The identification is DMI-based with a vendor specific way to tell them
apart in a reliable way.
Drivers for LEDs and Watchdogs will follow to make use of that platform
detection.
There is also some code to allow secondary drivers to find GPIO memory,
that needs to be in place because the pinctrl drivers do not come up.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Link: https://lore.kernel.org/r/20211213120502.20661-2-henning.schild@siemens.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Add driver to handle WMI events, control the keyboard backlight and
bind/unbind the keyboard-touch / digitizer driver so that only one
is active at a time.
It may seem a bit weird to handle the toggling of the modes in the
kernel, but the hw actually expects only 1 device to be active
at a time.
Changes by Hans de Goede:
- Whole bunch of cleanups
- Make the kernel do the driver bind/unbind itself instead of
sending events to userspace and requiring a special userspace
daemon to deal with this
Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Co-developed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211128190031.405620-4-hdegoede@redhat.com
drm-misc-next for 5.17:
UAPI Changes:
* Remove restrictions on DMA_BUF_SET_NAME ioctl
* connector: State of privacy screen
* sysfs: Send hotplug uevent
Cross-subsystem Changes:
* clk/bmc-2835: Fixes
* dma-buf: Add dma_resv selftest; Error-handling fixes; Add debugfs
helpers; Remove dma_resv_get_excl_unlocked(); Documentation fixes
* pwm: Introduce of_pwm_single_xlate()
Core Changes:
* Support for privacy screens
* Make drm_irq.c legacy
* Fix __stack_depot_* name conflict
* Documentation fixes
* Fixes and cleanups
* dp-helper: Reuse 8b/10b link-training delay helpers
* format-helper: Update interfaces
* fb-helper: Allocate shadow buffer of correct size
* gem: Link GEM SHMEM and CMA helpers into separate modules; Use
dma_resv iterator; Import DMA_BUF namespace into GEM-helper modules
* gem/shmem-helper: Interface cleanups
* scheduler: Grab fence in drm_sched_job_add_implicit_dependencies();
Lockdep fixes
* kms-helpers: Link several files from core into the KMS-helper module
Driver Changes:
* Use dma_resv_iter in several places
* Fixes and cleanups
* amdgpu: Use drm_kms_helper_connector_hotplug_event(); Get all fences
at once
* bridge: Switch to managed MIPI DSI helpers in several places; Register
and attach during probe in several places; Convert to YAML in several
places
* bridge/anx7625: Support MIPI DPI input; Support HDMI audio; Fixes
* bridge/dw-hdmi: Allow interlace on bridge
* bridge/ps8640: Enable PM; Support aux-bus
* bridge/tc358768: Enabled reference clock; Support pulse mode;
Modesetting fixes
* bridge/ti-sn65dsi86: Use regmap_bulk_write(); Implement PWM
* etnaviv: Get all fences at once
* gma500: GEM object cleanups; Remove generic drivers in probe function
* i915: Support VESA panel backlights
* ingenic: Fixes and cleanups
* kirin: Adjust probe order
* kmb: Enable framebuffer console
* lima: Kconfig fixes
* meson: Refactoring to supperot DRM_BRIDGE_ATTACH_NO_ENCODER
* msm: Fixes and cleanups
* msm/dsi: Adjust probe order
* omap: Fixes and cleanups
* nouveau: CRC fixes; Validate LUTs in atomic check; Set HDMI AVI RGB
quantization to FULL; Fixes and cleanups
* panel: Support Innolux G070Y2-T02, Vivax TPC-9150, JDI R63452,
Newhaven 1.8-128160EF, Wanchanglong W552964ABA, Novatek NT35950,
BOE BF060Y8M, Sony Tulip Truly NT35521; Use dev_err_probe() throughout
drivers; Fixes and cleanups
* panel/ili9881c: Orientation fixes
* radeon: Use dma_resv_wait_timeout()
* rockchip: Add timeout for DSP hold; Suspend/resume fixes; PLL clock
fixes; Implement mmap in GEM object functions
* simpledrm: Support FB_DAMAGE_CLIPS and virtual screen sizes
* sun4i: Use CMA helpers without vmap support
* tidss: Fixes and cleanups
* v3d: Cleanups
* vc4: Fix HDMI-CEC hang when display is off; Power on HDMI controller
while disabling; Support 4k@60 Hz modes; Fixes and cleanups
* video: Convert to sysfs_emit() in several places
* video/omapfb: Fix fall-through
* virtio: Overflow fixes
* xen: Implement mmap as GEM object functions
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/YZYZSypIrr+qcih3@linux-uq9g.fritz.box
When CONFIG_INPUT is disabled, this driver now fails to link:
ld.lld: error: undefined symbol: devm_input_allocate_device
>>> referenced by system76_acpi.c
>>> platform/x86/system76_acpi.o:(system76_add) in archive drivers/built-in.a
ld.lld: error: undefined symbol: input_set_capability
>>> referenced by system76_acpi.c
>>> platform/x86/system76_acpi.o:(system76_add) in archive drivers/built-in.a
ld.lld: error: undefined symbol: devm_hwmon_device_register_with_info
>>> referenced by system76_acpi.c
>>> platform/x86/system76_acpi.o:(system76_add) in archive drivers/built-in.a
ld.lld: error: undefined symbol: battery_hook_unregister
>>> referenced by system76_acpi.c
>>> platform/x86/system76_acpi.o:(system76_remove) in archive drivers/built-in.a
Add Kconfig dependencies for each of these three.
Fixes: 0de30fc684 ("platform/x86: system76_acpi: Replace Fn+F2 function for OLED models")
Fixes: 95563d45b5 ("platform/x86: system76_acpi: Report temperature and fan speed")
Fixes: 76f7eba3e0 ("platform/x86: system76_acpi: Add battery charging thresholds")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211022154901.904984-1-arnd@kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Add a driver providing access to the GPIOs for the identify button and led
present on Barco P50 board, based on the pcengines-apuv2.c driver.
There is unfortunately no suitable ACPI entry for the EC communication
interface, so instead bind to boards with "P50" as their DMI product family
and hard code the I/O port number (0x299).
The driver also hooks up the leds-gpio and gpio-keys-polled drivers to the
GPIOs, so they are finally exposed as:
LED:
/sys/class/leds/identify
Button: (/proc/bus/input/devices)
I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name="identify"
P: Phys=gpio-keys-polled/input0
S: Sysfs=/devices/platform/barco-p50-gpio/gpio-keys-polled/input/input10
U: Uniq=
H: Handlers=event10
B: PROP=0
B: EV=3
B: KEY=1000000 0 0 0 0 0 0
Signed-off-by: Santosh Kumar Yadav <santoshkumar.yadav@barco.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Link: https://lore.kernel.org/r/20211020123634.2638-1-peter@korsgaard.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Register a privacy-screen device on laptops with a privacy-screen,
this exports the PrivacyGuard features to user-space using a
standardized vendor-agnostic sysfs interface. Note the sysfs interface
is read-only.
Registering a privacy-screen device with the new privacy-screen class
code will also allow the GPU driver to get a handle to it and export
the privacy-screen setting as a property on the DRM connector object
for the LCD panel. This DRM connector property is a new standardized
interface which all user-space code should use to query and control
the privacy-screen.
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-9-hdegoede@redhat.com
Rename the wmaa-backlight-wmi driver and associated KConfig option to
remove the remaining references to the "WMAA" ACPI handle which was
used in the previous name. The driver has already been updated to
remove internal references to "WMAA". As part of the renaming, the
components in the name have been rearranged to reflect the standard
vendor_wmi_feature pattern.
Signed-off-by: Daniel Dadap <ddadap@nvidia.com>
Link: https://lore.kernel.org/r/20210927202359.13684-2-ddadap@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
A number of upcoming notebook computer designs drive the internal
display panel's backlight PWM through the Embedded Controller (EC).
This EC-based backlight control can be plumbed through to an ACPI
"WMAA" method interface, which in turn can be wrapped by WMI with
the GUID handle 603E9613-EF25-4338-A3D0-C46177516DB7.
Add a new driver, aliased to the WMAA WMI GUID, to expose a sysfs
backlight class driver to control backlight levels on systems with
EC-driven backlights.
Signed-off-by: Daniel Dadap <ddadap@nvidia.com>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20210903003838.15797-1-ddadap@nvidia.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
