1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * X86 ACPI Utility Functions
4 *
5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
6 *
7 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
8 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
9 */
10
11 #define pr_fmt(fmt) "ACPI: " fmt
12
13 #include <linux/acpi.h>
14 #include <linux/dmi.h>
15 #include <linux/platform_device.h>
16 #include <asm/cpu_device_id.h>
17 #include <asm/intel-family.h>
18 #include "../internal.h"
19
20 /*
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.
24 *
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.
27 *
28 * Likewise sometimes some not-actually present devices are sometimes
29 * reported as present, which may cause issues.
30 *
31 * We work around this by using the below quirk list to override the status
32 * reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0).
33 * Note this MUST only be done for devices where this is safe.
34 *
35 * This status overriding is limited to specific CPU (SoC) models both to
36 * avoid potentially causing trouble on other models and because some HIDs
37 * are re-used on different SoCs for completely different devices.
38 */
39 struct override_status_id {
40 struct acpi_device_id hid[2];
41 struct x86_cpu_id cpu_ids[2];
42 struct dmi_system_id dmi_ids[2]; /* Optional */
43 const char *uid;
44 const char *path;
45 unsigned long long status;
46 };
47
48 #define ENTRY(status, hid, uid, path, cpu_vfm, dmi...) { \
49 { { hid, }, {} }, \
50 { X86_MATCH_VFM(cpu_vfm, NULL), {} }, \
51 { { .matches = dmi }, {} }, \
52 uid, \
53 path, \
54 status, \
55 }
56
57 #define PRESENT_ENTRY_HID(hid, uid, cpu_vfm, dmi...) \
58 ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_vfm, dmi)
59
60 #define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_vfm, dmi...) \
61 ENTRY(0, hid, uid, NULL, cpu_vfm, dmi)
62
63 #define PRESENT_ENTRY_PATH(path, cpu_vfm, dmi...) \
64 ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_vfm, dmi)
65
66 #define NOT_PRESENT_ENTRY_PATH(path, cpu_vfm, dmi...) \
67 ENTRY(0, "", NULL, path, cpu_vfm, dmi)
68
69 static const struct override_status_id override_status_ids[] = {
70 /*
71 * Bay / Cherry Trail PWM directly poked by GPU driver in win10,
72 * but Linux uses a separate PWM driver, harmless if not used.
73 */
74 PRESENT_ENTRY_HID("80860F09", "1", INTEL_ATOM_SILVERMONT, {}),
75 PRESENT_ENTRY_HID("80862288", "1", INTEL_ATOM_AIRMONT, {}),
76
77 /* The Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */
78 PRESENT_ENTRY_HID("80862289", "2", INTEL_ATOM_AIRMONT, {
79 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
80 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
81 }),
82
83 /*
84 * The INT0002 device is necessary to clear wakeup interrupt sources
85 * on Cherry Trail devices, without it we get nobody cared IRQ msgs.
86 */
87 PRESENT_ENTRY_HID("INT0002", "1", INTEL_ATOM_AIRMONT, {}),
88 /*
89 * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides
90 * the touchscreen ACPI device until a certain time
91 * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed
92 * *and* _STA has been called at least 3 times since.
93 */
94 PRESENT_ENTRY_HID("SYNA7500", "1", INTEL_HASWELL_L, {
95 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
96 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
97 }),
98 PRESENT_ENTRY_HID("SYNA7500", "1", INTEL_HASWELL_L, {
99 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
100 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"),
101 }),
102
103 /*
104 * The Dell XPS 15 9550 has a SMO8110 accelerometer /
105 * HDD freefall sensor which is wrongly marked as not present.
106 */
107 PRESENT_ENTRY_HID("SMO8810", "1", INTEL_SKYLAKE, {
108 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
109 DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9550"),
110 }),
111
112 /*
113 * The GPD win BIOS dated 20170221 has disabled the accelerometer, the
114 * drivers sometimes cause crashes under Windows and this is how the
115 * manufacturer has solved this :| The DMI match may not seem unique,
116 * but it is. In the 67000+ DMI decode dumps from linux-hardware.org
117 * only 116 have board_vendor set to "AMI Corporation" and of those 116
118 * only the GPD win and pocket entries' board_name is "Default string".
119 *
120 * Unfortunately the GPD pocket also uses these strings and its BIOS
121 * was copy-pasted from the GPD win, so it has a disabled KIOX000A
122 * node which we should not enable, thus we also check the BIOS date.
123 */
124 PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, {
125 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
126 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
127 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
128 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017")
129 }),
130 PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, {
131 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
132 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
133 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
134 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017")
135 }),
136 PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, {
137 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
138 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
139 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
140 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017")
141 }),
142
143 /*
144 * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO
145 * mmc controller enabled and that has a child-device which _PS3
146 * method sets a GPIO causing the PCI wifi card to turn off.
147 * See above remark about uniqueness of the DMI match.
148 */
149 NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", INTEL_ATOM_AIRMONT, {
150 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
151 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
152 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
153 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
154 }),
155
156 /*
157 * The LSM303D on the Lenovo Yoga Tablet 2 series is present
158 * as both ACCL0001 and MAGN0001. As we can only ever register an
159 * i2c client for one of them, ignore MAGN0001.
160 */
161 NOT_PRESENT_ENTRY_HID("MAGN0001", "1", INTEL_ATOM_SILVERMONT, {
162 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
163 DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"),
164 }),
165 };
166
acpi_device_override_status(struct acpi_device * adev,unsigned long long * status)167 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status)
168 {
169 bool ret = false;
170 unsigned int i;
171
172 for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) {
173 if (!x86_match_cpu(override_status_ids[i].cpu_ids))
174 continue;
175
176 if (override_status_ids[i].dmi_ids[0].matches[0].slot &&
177 !dmi_check_system(override_status_ids[i].dmi_ids))
178 continue;
179
180 if (override_status_ids[i].path) {
181 struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL };
182 bool match;
183
184 if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path))
185 continue;
186
187 match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0;
188 kfree(path.pointer);
189
190 if (!match)
191 continue;
192 } else {
193 if (acpi_match_device_ids(adev, override_status_ids[i].hid))
194 continue;
195
196 if (!acpi_dev_uid_match(adev, override_status_ids[i].uid))
197 continue;
198 }
199
200 *status = override_status_ids[i].status;
201 ret = true;
202 break;
203 }
204
205 return ret;
206 }
207
208 /*
209 * AMD systems from Renoir onwards *require* that the NVME controller
210 * is put into D3 over a Modern Standby / suspend-to-idle cycle.
211 *
212 * This is "typically" accomplished using the `StorageD3Enable`
213 * property in the _DSD that is checked via the `acpi_storage_d3` function
214 * but some OEM systems still don't have it in their BIOS.
215 *
216 * The Microsoft documentation for StorageD3Enable mentioned that Windows has
217 * a hardcoded allowlist for D3 support as well as a registry key to override
218 * the BIOS, which has been used for these cases.
219 *
220 * This allows quirking on Linux in a similar fashion.
221 *
222 * Cezanne systems shouldn't *normally* need this as the BIOS includes
223 * StorageD3Enable. But for two reasons we have added it.
224 * 1) The BIOS on a number of Dell systems have ambiguity
225 * between the same value used for _ADR on ACPI nodes GPP1.DEV0 and GPP1.NVME.
226 * GPP1.NVME is needed to get StorageD3Enable node set properly.
227 * https://bugzilla.kernel.org/show_bug.cgi?id=216440
228 * https://bugzilla.kernel.org/show_bug.cgi?id=216773
229 * https://bugzilla.kernel.org/show_bug.cgi?id=217003
230 * 2) On at least one HP system StorageD3Enable is missing on the second NVME
231 * disk in the system.
232 * 3) On at least one HP Rembrandt system StorageD3Enable is missing on the only
233 * NVME device.
234 */
force_storage_d3(void)235 bool force_storage_d3(void)
236 {
237 if (!cpu_feature_enabled(X86_FEATURE_ZEN))
238 return false;
239 return acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0;
240 }
241
242 /*
243 * x86 ACPI boards which ship with only Android as their factory image usually
244 * declare a whole bunch of bogus I2C devices in their ACPI tables and sometimes
245 * there are issues with serdev devices on these boards too, e.g. the resource
246 * points to the wrong serdev_controller.
247 *
248 * Instantiating I2C / serdev devs for these bogus devs causes various issues,
249 * e.g. GPIO/IRQ resource conflicts because sometimes drivers do bind to them.
250 * The Android x86 kernel fork shipped on these devices has some special code
251 * to remove the bogus I2C clients (and AFAICT serdevs are ignored completely).
252 *
253 * The acpi_quirk_skip_*_enumeration() functions below are used by the I2C or
254 * serdev code to skip instantiating any I2C or serdev devs on broken boards.
255 *
256 * In case of I2C an exception is made for HIDs on the i2c_acpi_known_good_ids
257 * list. These are known to always be correct (and in case of the audio-codecs
258 * the drivers heavily rely on the codec being enumerated through ACPI).
259 *
260 * Note these boards typically do actually have I2C and serdev devices,
261 * just different ones then the ones described in their DSDT. The devices
262 * which are actually present are manually instantiated by the
263 * drivers/platform/x86/x86-android-tablets.c kernel module.
264 */
265 #define ACPI_QUIRK_SKIP_I2C_CLIENTS BIT(0)
266 #define ACPI_QUIRK_UART1_SKIP BIT(1)
267 #define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(2)
268 #define ACPI_QUIRK_PNP_UART1_SKIP BIT(3)
269 #define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(4)
270 #define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(5)
271 #define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(6)
272
273 static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = {
274 /*
275 * 1. Devices with only the skip / don't-skip AC and battery quirks,
276 * sorted alphabetically.
277 */
278 {
279 /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
280 .matches = {
281 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
282 },
283 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY
284 },
285 {
286 /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
287 .matches = {
288 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
289 DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
290 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
291 },
292 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY
293 },
294
295 /*
296 * 2. Devices which also have the skip i2c/serdev quirks and which
297 * need the x86-android-tablets module to properly work.
298 */
299 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
300 {
301 /* Acer Iconia One 7 B1-750 */
302 .matches = {
303 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
304 DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"),
305 },
306 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
307 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
308 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
309 },
310 {
311 .matches = {
312 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
313 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"),
314 },
315 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
316 ACPI_QUIRK_UART1_TTY_UART2_SKIP |
317 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
318 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
319 },
320 {
321 /* Lenovo Yoga Book X90F/L */
322 .matches = {
323 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
324 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
325 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
326 },
327 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
328 ACPI_QUIRK_UART1_SKIP |
329 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
330 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
331 },
332 {
333 .matches = {
334 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
335 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
336 },
337 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
338 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
339 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
340 },
341 {
342 /* Lenovo Yoga Tablet 2 1050F/L */
343 .matches = {
344 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
345 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
346 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
347 /* Partial match on beginning of BIOS version */
348 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
349 },
350 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
351 ACPI_QUIRK_PNP_UART1_SKIP |
352 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
353 },
354 {
355 /* Lenovo Yoga Tab 3 Pro X90F */
356 .matches = {
357 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
358 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
359 },
360 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
361 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
362 },
363 {
364 /* Medion Lifetab S10346 */
365 .matches = {
366 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
367 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
368 /* Way too generic, also match on BIOS data */
369 DMI_MATCH(DMI_BIOS_DATE, "10/22/2015"),
370 },
371 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
372 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
373 },
374 {
375 /* Nextbook Ares 8 (BYT version)*/
376 .matches = {
377 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
378 DMI_MATCH(DMI_PRODUCT_NAME, "M890BAP"),
379 },
380 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
381 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
382 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
383 },
384 {
385 /* Nextbook Ares 8A (CHT version)*/
386 .matches = {
387 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
388 DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"),
389 DMI_MATCH(DMI_BIOS_VERSION, "M882"),
390 },
391 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
392 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
393 },
394 {
395 /* Whitelabel (sold as various brands) TM800A550L */
396 .matches = {
397 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
398 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
399 /* Above strings are too generic, also match on BIOS version */
400 DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"),
401 },
402 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
403 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
404 },
405 #endif
406 {}
407 };
408
409 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
410 static const struct acpi_device_id i2c_acpi_known_good_ids[] = {
411 { "10EC5640", 0 }, /* RealTek ALC5640 audio codec */
412 { "10EC5651", 0 }, /* RealTek ALC5651 audio codec */
413 { "INT33F4", 0 }, /* X-Powers AXP288 PMIC */
414 { "INT33FD", 0 }, /* Intel Crystal Cove PMIC */
415 { "INT34D3", 0 }, /* Intel Whiskey Cove PMIC */
416 { "NPCE69A", 0 }, /* Asus Transformer keyboard dock */
417 {}
418 };
419
acpi_quirk_skip_i2c_client_enumeration(struct acpi_device * adev)420 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
421 {
422 const struct dmi_system_id *dmi_id;
423 long quirks;
424
425 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
426 if (!dmi_id)
427 return false;
428
429 quirks = (unsigned long)dmi_id->driver_data;
430 if (!(quirks & ACPI_QUIRK_SKIP_I2C_CLIENTS))
431 return false;
432
433 return acpi_match_device_ids(adev, i2c_acpi_known_good_ids);
434 }
435 EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration);
436
acpi_dmi_skip_serdev_enumeration(struct device * controller_parent,bool * skip)437 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
438 {
439 struct acpi_device *adev = ACPI_COMPANION(controller_parent);
440 const struct dmi_system_id *dmi_id;
441 long quirks = 0;
442 u64 uid;
443 int ret;
444
445 ret = acpi_dev_uid_to_integer(adev, &uid);
446 if (ret)
447 return 0;
448
449 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
450 if (dmi_id)
451 quirks = (unsigned long)dmi_id->driver_data;
452
453 if (!dev_is_platform(controller_parent)) {
454 /* PNP enumerated UARTs */
455 if ((quirks & ACPI_QUIRK_PNP_UART1_SKIP) && uid == 1)
456 *skip = true;
457
458 return 0;
459 }
460
461 if ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1)
462 *skip = true;
463
464 if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) {
465 if (uid == 1)
466 return -ENODEV; /* Create tty cdev instead of serdev */
467
468 if (uid == 2)
469 *skip = true;
470 }
471
472 return 0;
473 }
474
acpi_quirk_skip_gpio_event_handlers(void)475 bool acpi_quirk_skip_gpio_event_handlers(void)
476 {
477 const struct dmi_system_id *dmi_id;
478 long quirks;
479
480 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
481 if (!dmi_id)
482 return false;
483
484 quirks = (unsigned long)dmi_id->driver_data;
485 return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS);
486 }
487 EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers);
488 #else
acpi_dmi_skip_serdev_enumeration(struct device * controller_parent,bool * skip)489 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
490 {
491 return 0;
492 }
493 #endif
494
acpi_quirk_skip_serdev_enumeration(struct device * controller_parent,bool * skip)495 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
496 {
497 struct acpi_device *adev = ACPI_COMPANION(controller_parent);
498
499 *skip = false;
500
501 /*
502 * The DELL0501 ACPI HID represents an UART (CID is set to PNP0501) with
503 * a backlight-controller attached. There is no separate ACPI device with
504 * an UartSerialBusV2() resource to model the backlight-controller.
505 * Set skip to true so that the tty core creates a serdev ctrl device.
506 * The backlight driver will manually create the serdev client device.
507 */
508 if (acpi_dev_hid_match(adev, "DELL0501")) {
509 *skip = true;
510 /*
511 * Create a platform dev for dell-uart-backlight to bind to.
512 * This is a static device, so no need to store the result.
513 */
514 platform_device_register_simple("dell-uart-backlight", PLATFORM_DEVID_NONE,
515 NULL, 0);
516 return 0;
517 }
518
519 return acpi_dmi_skip_serdev_enumeration(controller_parent, skip);
520 }
521 EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);
522
523 /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
524 static const struct {
525 const char *hid;
526 int hrv;
527 } acpi_skip_ac_and_battery_pmic_ids[] = {
528 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
529 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
530 };
531
acpi_quirk_skip_acpi_ac_and_battery(void)532 bool acpi_quirk_skip_acpi_ac_and_battery(void)
533 {
534 const struct dmi_system_id *dmi_id;
535 long quirks = 0;
536 int i;
537
538 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
539 if (dmi_id)
540 quirks = (unsigned long)dmi_id->driver_data;
541
542 if (quirks & ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY)
543 return true;
544
545 if (quirks & ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY)
546 return false;
547
548 for (i = 0; i < ARRAY_SIZE(acpi_skip_ac_and_battery_pmic_ids); i++) {
549 if (acpi_dev_present(acpi_skip_ac_and_battery_pmic_ids[i].hid, "1",
550 acpi_skip_ac_and_battery_pmic_ids[i].hrv)) {
551 pr_info_once("found native %s PMIC, skipping ACPI AC and battery devices\n",
552 acpi_skip_ac_and_battery_pmic_ids[i].hid);
553 return true;
554 }
555 }
556
557 return false;
558 }
559 EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery);
560
561 /* This section provides a workaround for a specific x86 system
562 * which requires disabling of mwait to work correctly.
563 */
acpi_proc_quirk_set_no_mwait(const struct dmi_system_id * id)564 static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id)
565 {
566 pr_notice("%s detected - disabling mwait for CPU C-states\n",
567 id->ident);
568 boot_option_idle_override = IDLE_NOMWAIT;
569 return 0;
570 }
571
572 static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = {
573 {
574 .callback = acpi_proc_quirk_set_no_mwait,
575 .ident = "Extensa 5220",
576 .matches = {
577 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
578 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
579 DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
580 DMI_MATCH(DMI_BOARD_NAME, "Columbia"),
581 },
582 .driver_data = NULL,
583 },
584 {}
585 };
586
acpi_proc_quirk_mwait_check(void)587 void __init acpi_proc_quirk_mwait_check(void)
588 {
589 /*
590 * Check whether the system is DMI table. If yes, OSPM
591 * should not use mwait for CPU-states.
592 */
593 dmi_check_system(acpi_proc_quirk_mwait_dmi_table);
594 }
595