1 # SPDX-License-Identifier: GPL-2.0-only
3 # Microsoft Surface Platform-Specific Drivers
6 menuconfig SURFACE_PLATFORMS
7 bool "Microsoft Surface Platform-Specific Device Drivers"
8 depends on ARM64 || X86 || COMPILE_TEST
11 Say Y here to get to see options for platform-specific device drivers
12 for Microsoft Surface devices. This option alone does not add any
15 If you say N, all options in this submenu will be skipped and disabled.
20 tristate "Surface 3 WMI Driver"
26 Say Y here if you have a Surface 3.
28 To compile this driver as a module, choose M here: the module will
29 be called surface3-wmi.
31 config SURFACE_3_POWER_OPREGION
32 tristate "Surface 3 battery platform operation region support"
36 This driver provides support for ACPI operation
37 region of the Surface 3 battery platform driver.
39 config SURFACE_ACPI_NOTIFY
40 tristate "Surface ACPI Notify Driver"
41 depends on SURFACE_AGGREGATOR
43 Surface ACPI Notify (SAN) driver for Microsoft Surface devices.
45 This driver provides support for the ACPI interface (called SAN) of
46 the Surface System Aggregator Module (SSAM) EC. This interface is used
47 on 5th- and 6th-generation Microsoft Surface devices (including
48 Surface Pro 5 and 6, Surface Book 2, Surface Laptops 1 and 2, and in
49 reduced functionality on the Surface Laptop 3) to execute SSAM
50 requests directly from ACPI code, as well as receive SSAM events and
51 turn them into ACPI notifications. It essentially acts as a
52 translation layer between the SSAM controller and ACPI.
54 Specifically, this driver may be needed for battery status reporting,
55 thermal sensor access, and real-time clock information, depending on
56 the Surface device in question.
58 config SURFACE_AGGREGATOR_CDEV
59 tristate "Surface System Aggregator Module User-Space Interface"
60 depends on SURFACE_AGGREGATOR
62 Provides a misc-device interface to the Surface System Aggregator
63 Module (SSAM) controller.
65 This option provides a module (called surface_aggregator_cdev), that,
66 when loaded, will add a client device (and its respective driver) to
67 the SSAM controller. Said client device manages a misc-device
68 interface (/dev/surface/aggregator), which can be used by user-space
69 tools to directly communicate with the SSAM EC by sending requests and
70 receiving the corresponding responses.
72 The provided interface is intended for debugging and development only,
73 and should not be used otherwise.
75 config SURFACE_AGGREGATOR_HUB
76 tristate "Surface System Aggregator Module Subsystem Device Hubs"
77 depends on SURFACE_AGGREGATOR
78 depends on SURFACE_AGGREGATOR_BUS
80 Device-hub drivers for Surface System Aggregator Module (SSAM) subsystem
83 Provides subsystem hub drivers which manage client devices on various
84 SSAM subsystems. In some subsystems, notably the BAS subsystem managing
85 devices contained in the base of the Surface Book 3 and the KIP subsystem
86 managing type-cover devices in the Surface Pro 8 and Surface Pro X,
87 devices can be (hot-)removed. Hub devices and drivers are required to
88 manage these subdevices.
90 Devices managed via these hubs are:
91 - Battery/AC devices (Surface Book 3).
92 - HID input devices (7th-generation and later models with detachable
95 Select M (recommended) or Y here if you want support for the above
96 mentioned devices on the corresponding Surface models. Without this
97 module, the respective devices mentioned above will not be instantiated
98 and thus any functionality provided by them will be missing, even when
99 drivers for these devices are present. This module only provides the
100 respective subsystem hubs. Both drivers and device specification (e.g.
101 via the Surface Aggregator Registry) for these devices still need to be
102 selected via other options.
104 config SURFACE_AGGREGATOR_REGISTRY
105 tristate "Surface System Aggregator Module Device Registry"
106 depends on SURFACE_AGGREGATOR
107 depends on SURFACE_AGGREGATOR_BUS
109 Device-registry for Surface System Aggregator Module (SSAM) devices.
111 Provides a module and driver which act as a device-registry for SSAM
112 client devices that cannot be detected automatically, e.g. via ACPI.
113 Such devices are instead provided and managed via this registry.
115 Devices provided via this registry are:
116 - Platform profile (performance-/cooling-mode) device (5th- and later
118 - Battery/AC devices (7th-generation).
119 - HID input devices (7th-generation).
121 Select M (recommended) or Y here if you want support for the above
122 mentioned devices on the corresponding Surface models. Without this
123 module, the respective devices will not be instantiated and thus any
124 functionality provided by them will be missing, even when drivers for
125 these devices are present. In other words, this module only provides
126 the respective client devices. Drivers for these devices still need to
127 be selected via the other options.
129 config SURFACE_AGGREGATOR_TABLET_SWITCH
130 tristate "Surface Aggregator Generic Tablet-Mode Switch Driver"
131 depends on SURFACE_AGGREGATOR
132 depends on SURFACE_AGGREGATOR_BUS
135 Provides a tablet-mode switch input device on Microsoft Surface models
136 using the KIP subsystem for detachable keyboards (e.g. keyboard covers)
137 or the POS subsystem for device/screen posture changes.
139 The KIP subsystem is used on newer Surface generations to handle
140 detachable input peripherals, specifically the keyboard cover (containing
141 keyboard and touchpad) on the Surface Pro 8 and Surface Pro X. The POS
142 subsystem is used for device posture change notifications on the Surface
143 Laptop Studio. This module provides a driver to let user-space know when
144 the device should be considered in tablet-mode due to the keyboard cover
145 being detached or folded back (essentially signaling when the keyboard is
146 not available for input). It does so by creating a tablet-mode switch
147 input device, sending the standard SW_TABLET_MODE event on mode change.
149 Select M or Y here, if you want to provide tablet-mode switch input
150 events on the Surface Pro 8, Surface Pro X, and Surface Laptop Studio.
153 tristate "Surface DTX (Detachment System) Driver"
154 depends on SURFACE_AGGREGATOR
157 Driver for the Surface Book clipboard detachment system (DTX).
159 On the Surface Book series devices, the display part containing the
160 CPU (called the clipboard) can be detached from the base (containing a
161 battery, the keyboard, and, optionally, a discrete GPU) by (if
162 necessary) unlocking and opening the latch connecting both parts.
164 This driver provides a user-space interface that can influence the
165 behavior of this process, which includes the option to abort it in
166 case the base is still in use or speed it up in case it is not.
168 Note that this module can be built without support for the Surface
169 Aggregator Bus (i.e. CONFIG_SURFACE_AGGREGATOR_BUS=n). In that case,
170 some devices, specifically the Surface Book 3, will not be supported.
173 tristate "Surface GPE/Lid Support Driver"
177 This driver marks the GPEs related to the ACPI lid device found on
178 Microsoft Surface devices as wakeup sources and prepares them
179 accordingly. It is required on those devices to allow wake-ups from
180 suspend by opening the lid.
182 config SURFACE_HOTPLUG
183 tristate "Surface Hot-Plug Driver"
187 Driver for out-of-band hot-plug event signaling on Microsoft Surface
188 devices with hot-pluggable PCIe cards.
190 This driver is used on Surface Book (2 and 3) devices with a
191 hot-pluggable discrete GPU (dGPU). When not in use, the dGPU on those
192 devices can enter D3cold, which prevents in-band (standard) PCIe
193 hot-plug signaling. Thus, without this driver, detaching the base
194 containing the dGPU will not correctly update the state of the
195 corresponding PCIe device if it is in D3cold. This driver adds support
196 for out-of-band hot-plug notifications, ensuring that the device state
197 is properly updated even when the device in question is in D3cold.
199 Select M or Y here, if you want to (fully) support hot-plugging of
200 dGPU devices on the Surface Book 2 and/or 3 during D3cold.
202 config SURFACE_PLATFORM_PROFILE
203 tristate "Surface Platform Profile Driver"
205 depends on SURFACE_AGGREGATOR_REGISTRY
206 select ACPI_PLATFORM_PROFILE
208 Provides support for the ACPI platform profile on 5th- and later
209 generation Microsoft Surface devices.
211 More specifically, this driver provides ACPI platform profile support
212 on Microsoft Surface devices with a Surface System Aggregator Module
213 (SSAM) connected via the Surface Serial Hub (SSH / SAM-over-SSH). In
214 other words, this driver provides platform profile support on the
215 Surface Pro 5, Surface Book 2, Surface Laptop, Surface Laptop Go and
216 later. On those devices, the platform profile can significantly
217 influence cooling behavior, e.g. setting it to 'quiet' (default) or
218 'low-power' can significantly limit performance of the discrete GPU on
219 Surface Books, while in turn leading to lower power consumption and/or
222 Select M or Y here, if you want to include ACPI platform profile
223 support on the above mentioned devices.
225 config SURFACE_PRO3_BUTTON
226 tristate "Power/home/volume buttons driver for Microsoft Surface Pro 3/4 tablet"
230 This driver handles the power/home/volume buttons on the Microsoft Surface Pro 3/4 tablet.
232 source "drivers/platform/surface/aggregator/Kconfig"
234 endif # SURFACE_PLATFORMS