2 * X86 ACPI Utility Functions
6 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
7 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/acpi.h>
15 #include <linux/dmi.h>
16 #include <asm/cpu_device_id.h>
17 #include <asm/intel-family.h>
18 #include "../internal.h"
21 * Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because
22 * some recent Windows drivers bind to one device but poke at multiple
23 * devices at the same time, so the others get hidden.
25 * Some BIOS-es (temporarily) hide specific APCI devices to work around Windows
26 * driver bugs. We use DMI matching to match known cases of this.
28 * We work around this by always reporting ACPI_STA_DEFAULT for these
29 * devices. Note this MUST only be done for devices where this is safe.
31 * This forcing of devices to be present is limited to specific CPU (SoC)
32 * models both to avoid potentially causing trouble on other models and
33 * because some HIDs are re-used on different SoCs for completely
36 struct always_present_id {
37 struct acpi_device_id hid[2];
38 struct x86_cpu_id cpu_ids[2];
39 struct dmi_system_id dmi_ids[2]; /* Optional */
43 #define ICPU(model) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, }
45 #define ENTRY(hid, uid, cpu_models, dmi...) { \
48 { { .matches = dmi }, {} }, \
52 static const struct always_present_id always_present_ids[] = {
54 * Bay / Cherry Trail PWM directly poked by GPU driver in win10,
55 * but Linux uses a separate PWM driver, harmless if not used.
57 ENTRY("80860F09", "1", ICPU(INTEL_FAM6_ATOM_SILVERMONT), {}),
58 ENTRY("80862288", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {}),
60 /* Lenovo Yoga Book uses PWM2 for keyboard backlight control */
61 ENTRY("80862289", "2", ICPU(INTEL_FAM6_ATOM_AIRMONT), {
62 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"),
65 * The INT0002 device is necessary to clear wakeup interrupt sources
66 * on Cherry Trail devices, without it we get nobody cared IRQ msgs.
68 ENTRY("INT0002", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {}),
70 * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides
71 * the touchscreen ACPI device until a certain time
72 * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed
73 * *and* _STA has been called at least 3 times since.
75 ENTRY("SYNA7500", "1", ICPU(INTEL_FAM6_HASWELL_ULT), {
76 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
77 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
79 ENTRY("SYNA7500", "1", ICPU(INTEL_FAM6_HASWELL_ULT), {
80 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
81 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"),
85 * The GPD win BIOS dated 20170221 has disabled the accelerometer, the
86 * drivers sometimes cause crashes under Windows and this is how the
87 * manufacturer has solved this :| Note that the the DMI data is less
88 * generic then it seems, a board_vendor of "AMI Corporation" is quite
89 * rare and a board_name of "Default String" also is rare.
91 * Unfortunately the GPD pocket also uses these strings and its BIOS
92 * was copy-pasted from the GPD win, so it has a disabled KIOX000A
93 * node which we should not enable, thus we also check the BIOS date.
95 ENTRY("KIOX000A", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {
96 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
97 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
98 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
99 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017")
101 ENTRY("KIOX000A", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {
102 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
103 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
104 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
105 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017")
107 ENTRY("KIOX000A", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {
108 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
109 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
110 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
111 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017")
115 bool acpi_device_always_present(struct acpi_device *adev)
120 for (i = 0; i < ARRAY_SIZE(always_present_ids); i++) {
121 if (acpi_match_device_ids(adev, always_present_ids[i].hid))
124 if (!adev->pnp.unique_id ||
125 strcmp(adev->pnp.unique_id, always_present_ids[i].uid))
128 if (!x86_match_cpu(always_present_ids[i].cpu_ids))
131 if (always_present_ids[i].dmi_ids[0].matches[0].slot &&
132 !dmi_check_system(always_present_ids[i].dmi_ids))