From 8af9fa37b8a3637832cbf8fdd9bd828bd5f0de66 Mon Sep 17 00:00:00 2001 From: Perry Yuan Date: Thu, 6 May 2021 19:56:05 +0800 Subject: platform/x86: dell-privacy: Add support for Dell hardware privacy add support for Dell privacy driver for the Dell units equipped hardware privacy design, which protect users privacy of audio and camera from hardware level. Once the audio or camera privacy mode activated, any applications will not get any audio or video stream when user pressed ctrl+F4 hotkey, audio privacy mode will be enabled, micmute led will be also changed accordingly The micmute led is fully controlled by hardware & EC(embedded controller) and camera mute hotkey is Ctrl+F9. Currently design only emits SW_CAMERA_LENS_COVER event while the camera lens shutter will be changed by EC & HW(hardware) control *The flow is like this: 1) User presses key. HW does stuff with this key (timeout timer is started) 2) WMI event is emitted from BIOS to kernel 3) WMI event is received by dell-privacy 4) KEY_MICMUTE emitted from dell-privacy 5) Userland picks up key and modifies kcontrol for SW mute 6) Codec kernel driver catches and calls ledtrig_audio_set 7) dell-privacy notifies EC, the timeout is cancelled and the HW mute is activated. If the EC is not notified then the HW mic mute will activate when the timeout triggers, just a bit later than with the active ack. Signed-off-by: Perry Yuan Link: https://lore.kernel.org/r/20210506115605.1504-1-Perry_Yuan@Dell.com [hdegoede@redhat.com: Rework Kconfig/Makefile bits + other small fixups] Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede --- .../ABI/testing/sysfs-platform-dell-privacy-wmi | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi b/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi new file mode 100644 index 000000000000..7f9e18705861 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi @@ -0,0 +1,55 @@ +What: /sys/bus/wmi/devices/6932965F-1671-4CEB-B988-D3AB0A901919/dell_privacy_supported_type +Date: Apr 2021 +KernelVersion: 5.13 +Contact: "perry.yuan@dell.com>" +Description: + Display which dell hardware level privacy devices are supported + “Dell Privacy” is a set of HW, FW, and SW features to enhance + Dell’s commitment to platform privacy for MIC, Camera, and + ePrivacy screens. + The supported hardware privacy devices are: +Attributes: + Microphone Mute: + Identifies the local microphone can be muted by hardware, no applications + is available to capture system mic sound + + Camera Shutter: + Identifies camera shutter controlled by hardware, which is a micromechanical + shutter assembly that is built onto the camera module to block capturing images + from outside the laptop + + supported: + The privacy device is supported by this system + + unsupported: + The privacy device is not supported on this system + + For example to check which privacy devices are supported: + + # cat /sys/bus/wmi/drivers/dell-privacy/6932965F-1671-4CEB-B988-D3AB0A901919/dell_privacy_supported_type + [Microphone Mute] [supported] + [Camera Shutter] [supported] + [ePrivacy Screen] [unsupported] + +What: /sys/bus/wmi/devices/6932965F-1671-4CEB-B988-D3AB0A901919/dell_privacy_current_state +Date: Apr 2021 +KernelVersion: 5.13 +Contact: "perry.yuan@dell.com>" +Description: + Allow user space to check current dell privacy device state. + Describes the Device State class exposed by BIOS which can be + consumed by various applications interested in knowing the Privacy + feature capabilities +Attributes: + muted: + Identifies the privacy device is turned off and cannot send stream to OS applications + + unmuted: + Identifies the privacy device is turned on ,audio or camera driver can get + stream from mic and camera module to OS applications + + For example to check all supported current privacy device states: + + # cat /sys/bus/wmi/drivers/dell-privacy/6932965F-1671-4CEB-B988-D3AB0A901919/dell_privacy_current_state + [Microphone] [unmuted] + [Camera Shutter] [unmuted] -- cgit v1.2.3 From a40cd7ef22fbb11229cf982920f4ec96c1f49282 Mon Sep 17 00:00:00 2001 From: Mark Pearson Date: Sun, 30 May 2021 18:31:11 -0400 Subject: platform/x86: think-lmi: Add WMI interface support on Lenovo platforms For Lenovo platforms that support a WMI interface to the BIOS add support, using the firmware-attributes class, to allow users to access and modify various BIOS related settings. Signed-off-by: Mark Pearson Link: https://lore.kernel.org/r/20210530223111.25929-3-markpearson@lenovo.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede --- .../ABI/testing/sysfs-class-firmware-attributes | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-class-firmware-attributes b/Documentation/ABI/testing/sysfs-class-firmware-attributes index 8ea59fea4709..3348bf80a37c 100644 --- a/Documentation/ABI/testing/sysfs-class-firmware-attributes +++ b/Documentation/ABI/testing/sysfs-class-firmware-attributes @@ -197,8 +197,24 @@ Description: Drivers may emit a CHANGE uevent when a password is set or unset userspace may check it again. - On Dell systems, if Admin password is set, then all BIOS attributes + On Dell and Lenovo systems, if Admin password is set, then all BIOS attributes require password validation. + On Lenovo systems if you change the Admin password the new password is not active until + the next boot. + + Lenovo specific class extensions + ------------------------------ + + On Lenovo systems the following additional settings are available: + + lenovo_encoding: + The encoding method that is used. This can be either "ascii" + or "scancode". Default is set to "ascii" + + lenovo_kbdlang: + The keyboard language method that is used. This is generally a + two char code (e.g. "us", "fr", "gr") and may vary per platform. + Default is set to "us" What: /sys/class/firmware-attributes/*/attributes/pending_reboot Date: February 2021 -- cgit v1.2.3