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_model, dmi...) { \ 49 { { hid, }, {} }, \ 50 { X86_MATCH_INTEL_FAM6_MODEL(cpu_model, NULL), {} }, \ 51 { { .matches = dmi }, {} }, \ 52 uid, \ 53 path, \ 54 status, \ 55 } 56 57 #define PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ 58 ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_model, dmi) 59 60 #define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ 61 ENTRY(0, hid, uid, NULL, cpu_model, dmi) 62 63 #define PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ 64 ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_model, dmi) 65 66 #define NOT_PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ 67 ENTRY(0, "", NULL, path, cpu_model, 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", ATOM_SILVERMONT, {}), 75 PRESENT_ENTRY_HID("80862288", "1", ATOM_AIRMONT, {}), 76 77 /* The Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */ 78 PRESENT_ENTRY_HID("80862289", "2", 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", 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", 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", 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 GPD win BIOS dated 20170221 has disabled the accelerometer, the 105 * drivers sometimes cause crashes under Windows and this is how the 106 * manufacturer has solved this :| The DMI match may not seem unique, 107 * but it is. In the 67000+ DMI decode dumps from linux-hardware.org 108 * only 116 have board_vendor set to "AMI Corporation" and of those 116 109 * only the GPD win and pocket entries' board_name is "Default string". 110 * 111 * Unfortunately the GPD pocket also uses these strings and its BIOS 112 * was copy-pasted from the GPD win, so it has a disabled KIOX000A 113 * node which we should not enable, thus we also check the BIOS date. 114 */ 115 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 116 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 117 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 118 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 119 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017") 120 }), 121 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 122 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 123 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 124 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 125 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017") 126 }), 127 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 128 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 129 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 130 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 131 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017") 132 }), 133 134 /* 135 * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO 136 * mmc controller enabled and that has a child-device which _PS3 137 * method sets a GPIO causing the PCI wifi card to turn off. 138 * See above remark about uniqueness of the DMI match. 139 */ 140 NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", ATOM_AIRMONT, { 141 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 142 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 143 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 144 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 145 }), 146 147 /* 148 * The LSM303D on the Lenovo Yoga Tablet 2 series is present 149 * as both ACCL0001 and MAGN0001. As we can only ever register an 150 * i2c client for one of them, ignore MAGN0001. 151 */ 152 NOT_PRESENT_ENTRY_HID("MAGN0001", "1", ATOM_SILVERMONT, { 153 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 154 DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"), 155 }), 156 }; 157 158 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status) 159 { 160 bool ret = false; 161 unsigned int i; 162 163 for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) { 164 if (!x86_match_cpu(override_status_ids[i].cpu_ids)) 165 continue; 166 167 if (override_status_ids[i].dmi_ids[0].matches[0].slot && 168 !dmi_check_system(override_status_ids[i].dmi_ids)) 169 continue; 170 171 if (override_status_ids[i].path) { 172 struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL }; 173 bool match; 174 175 if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path)) 176 continue; 177 178 match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0; 179 kfree(path.pointer); 180 181 if (!match) 182 continue; 183 } else { 184 if (acpi_match_device_ids(adev, override_status_ids[i].hid)) 185 continue; 186 187 if (!acpi_dev_uid_match(adev, override_status_ids[i].uid)) 188 continue; 189 } 190 191 *status = override_status_ids[i].status; 192 ret = true; 193 break; 194 } 195 196 return ret; 197 } 198 199 /* 200 * AMD systems from Renoir and Lucienne *require* that the NVME controller 201 * is put into D3 over a Modern Standby / suspend-to-idle cycle. 202 * 203 * This is "typically" accomplished using the `StorageD3Enable` 204 * property in the _DSD that is checked via the `acpi_storage_d3` function 205 * but this property was introduced after many of these systems launched 206 * and most OEM systems don't have it in their BIOS. 207 * 208 * The Microsoft documentation for StorageD3Enable mentioned that Windows has 209 * a hardcoded allowlist for D3 support, which was used for these platforms. 210 * 211 * This allows quirking on Linux in a similar fashion. 212 * 213 * Cezanne systems shouldn't *normally* need this as the BIOS includes 214 * StorageD3Enable. But for two reasons we have added it. 215 * 1) The BIOS on a number of Dell systems have ambiguity 216 * between the same value used for _ADR on ACPI nodes GPP1.DEV0 and GPP1.NVME. 217 * GPP1.NVME is needed to get StorageD3Enable node set properly. 218 * https://bugzilla.kernel.org/show_bug.cgi?id=216440 219 * https://bugzilla.kernel.org/show_bug.cgi?id=216773 220 * https://bugzilla.kernel.org/show_bug.cgi?id=217003 221 * 2) On at least one HP system StorageD3Enable is missing on the second NVME 222 disk in the system. 223 */ 224 static const struct x86_cpu_id storage_d3_cpu_ids[] = { 225 X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 24, NULL), /* Picasso */ 226 X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 96, NULL), /* Renoir */ 227 X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 104, NULL), /* Lucienne */ 228 X86_MATCH_VENDOR_FAM_MODEL(AMD, 25, 80, NULL), /* Cezanne */ 229 {} 230 }; 231 232 bool force_storage_d3(void) 233 { 234 return x86_match_cpu(storage_d3_cpu_ids); 235 } 236 237 /* 238 * x86 ACPI boards which ship with only Android as their factory image usually 239 * declare a whole bunch of bogus I2C devices in their ACPI tables and sometimes 240 * there are issues with serdev devices on these boards too, e.g. the resource 241 * points to the wrong serdev_controller. 242 * 243 * Instantiating I2C / serdev devs for these bogus devs causes various issues, 244 * e.g. GPIO/IRQ resource conflicts because sometimes drivers do bind to them. 245 * The Android x86 kernel fork shipped on these devices has some special code 246 * to remove the bogus I2C clients (and AFAICT serdevs are ignored completely). 247 * 248 * The acpi_quirk_skip_*_enumeration() functions below are used by the I2C or 249 * serdev code to skip instantiating any I2C or serdev devs on broken boards. 250 * 251 * In case of I2C an exception is made for HIDs on the i2c_acpi_known_good_ids 252 * list. These are known to always be correct (and in case of the audio-codecs 253 * the drivers heavily rely on the codec being enumerated through ACPI). 254 * 255 * Note these boards typically do actually have I2C and serdev devices, 256 * just different ones then the ones described in their DSDT. The devices 257 * which are actually present are manually instantiated by the 258 * drivers/platform/x86/x86-android-tablets.c kernel module. 259 */ 260 #define ACPI_QUIRK_SKIP_I2C_CLIENTS BIT(0) 261 #define ACPI_QUIRK_UART1_SKIP BIT(1) 262 #define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(2) 263 #define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(3) 264 #define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(4) 265 #define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(5) 266 267 static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = { 268 /* 269 * 1. Devices with only the skip / don't-skip AC and battery quirks, 270 * sorted alphabetically. 271 */ 272 { 273 /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */ 274 .matches = { 275 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), 276 }, 277 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY 278 }, 279 { 280 /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */ 281 .matches = { 282 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 283 DMI_MATCH(DMI_PRODUCT_NAME, "80XF"), 284 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), 285 }, 286 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY 287 }, 288 289 /* 290 * 2. Devices which also have the skip i2c/serdev quirks and which 291 * need the x86-android-tablets module to properly work. 292 */ 293 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 294 { 295 /* Acer Iconia One 7 B1-750 */ 296 .matches = { 297 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 298 DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"), 299 }, 300 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 301 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 302 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 303 }, 304 { 305 .matches = { 306 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 307 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"), 308 }, 309 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 310 ACPI_QUIRK_UART1_TTY_UART2_SKIP | 311 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 312 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 313 }, 314 { 315 /* Lenovo Yoga Book X90F/L */ 316 .matches = { 317 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 318 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 319 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), 320 }, 321 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 322 ACPI_QUIRK_UART1_SKIP | 323 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 324 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 325 }, 326 { 327 .matches = { 328 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 329 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 330 }, 331 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 332 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 333 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 334 }, 335 { 336 /* Lenovo Yoga Tablet 2 1050F/L */ 337 .matches = { 338 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), 339 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), 340 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 341 /* Partial match on beginning of BIOS version */ 342 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), 343 }, 344 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 345 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 346 }, 347 { 348 /* Lenovo Yoga Tab 3 Pro X90F */ 349 .matches = { 350 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 351 DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 352 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), 353 }, 354 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 355 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 356 }, 357 { 358 /* Medion Lifetab S10346 */ 359 .matches = { 360 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 361 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 362 /* Way too generic, also match on BIOS data */ 363 DMI_MATCH(DMI_BIOS_DATE, "10/22/2015"), 364 }, 365 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 366 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 367 }, 368 { 369 /* Nextbook Ares 8 (BYT version)*/ 370 .matches = { 371 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 372 DMI_MATCH(DMI_PRODUCT_NAME, "M890BAP"), 373 }, 374 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 375 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 376 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 377 }, 378 { 379 /* Nextbook Ares 8A (CHT version)*/ 380 .matches = { 381 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 382 DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"), 383 DMI_MATCH(DMI_BIOS_VERSION, "M882"), 384 }, 385 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 386 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 387 }, 388 { 389 /* Whitelabel (sold as various brands) TM800A550L */ 390 .matches = { 391 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 392 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 393 /* Above strings are too generic, also match on BIOS version */ 394 DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"), 395 }, 396 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 397 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 398 }, 399 #endif 400 {} 401 }; 402 403 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 404 static const struct acpi_device_id i2c_acpi_known_good_ids[] = { 405 { "10EC5640", 0 }, /* RealTek ALC5640 audio codec */ 406 { "10EC5651", 0 }, /* RealTek ALC5651 audio codec */ 407 { "INT33F4", 0 }, /* X-Powers AXP288 PMIC */ 408 { "INT33FD", 0 }, /* Intel Crystal Cove PMIC */ 409 { "INT34D3", 0 }, /* Intel Whiskey Cove PMIC */ 410 { "NPCE69A", 0 }, /* Asus Transformer keyboard dock */ 411 {} 412 }; 413 414 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev) 415 { 416 const struct dmi_system_id *dmi_id; 417 long quirks; 418 419 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 420 if (!dmi_id) 421 return false; 422 423 quirks = (unsigned long)dmi_id->driver_data; 424 if (!(quirks & ACPI_QUIRK_SKIP_I2C_CLIENTS)) 425 return false; 426 427 return acpi_match_device_ids(adev, i2c_acpi_known_good_ids); 428 } 429 EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration); 430 431 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 432 { 433 struct acpi_device *adev = ACPI_COMPANION(controller_parent); 434 const struct dmi_system_id *dmi_id; 435 long quirks = 0; 436 u64 uid; 437 int ret; 438 439 *skip = false; 440 441 ret = acpi_dev_uid_to_integer(adev, &uid); 442 if (ret) 443 return 0; 444 445 /* to not match on PNP enumerated debug UARTs */ 446 if (!dev_is_platform(controller_parent)) 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 ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1) 454 *skip = true; 455 456 if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) { 457 if (uid == 1) 458 return -ENODEV; /* Create tty cdev instead of serdev */ 459 460 if (uid == 2) 461 *skip = true; 462 } 463 464 return 0; 465 } 466 EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration); 467 468 bool acpi_quirk_skip_gpio_event_handlers(void) 469 { 470 const struct dmi_system_id *dmi_id; 471 long quirks; 472 473 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 474 if (!dmi_id) 475 return false; 476 477 quirks = (unsigned long)dmi_id->driver_data; 478 return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS); 479 } 480 EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers); 481 #endif 482 483 /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */ 484 static const struct { 485 const char *hid; 486 int hrv; 487 } acpi_skip_ac_and_battery_pmic_ids[] = { 488 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */ 489 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */ 490 }; 491 492 bool acpi_quirk_skip_acpi_ac_and_battery(void) 493 { 494 const struct dmi_system_id *dmi_id; 495 long quirks = 0; 496 int i; 497 498 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 499 if (dmi_id) 500 quirks = (unsigned long)dmi_id->driver_data; 501 502 if (quirks & ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY) 503 return true; 504 505 if (quirks & ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY) 506 return false; 507 508 for (i = 0; i < ARRAY_SIZE(acpi_skip_ac_and_battery_pmic_ids); i++) { 509 if (acpi_dev_present(acpi_skip_ac_and_battery_pmic_ids[i].hid, "1", 510 acpi_skip_ac_and_battery_pmic_ids[i].hrv)) { 511 pr_info_once("found native %s PMIC, skipping ACPI AC and battery devices\n", 512 acpi_skip_ac_and_battery_pmic_ids[i].hid); 513 return true; 514 } 515 } 516 517 return false; 518 } 519 EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery); 520 521 /* This section provides a workaround for a specific x86 system 522 * which requires disabling of mwait to work correctly. 523 */ 524 static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id) 525 { 526 pr_notice("%s detected - disabling mwait for CPU C-states\n", 527 id->ident); 528 boot_option_idle_override = IDLE_NOMWAIT; 529 return 0; 530 } 531 532 static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = { 533 { 534 .callback = acpi_proc_quirk_set_no_mwait, 535 .ident = "Extensa 5220", 536 .matches = { 537 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 538 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 539 DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), 540 DMI_MATCH(DMI_BOARD_NAME, "Columbia"), 541 }, 542 .driver_data = NULL, 543 }, 544 {} 545 }; 546 547 void __init acpi_proc_quirk_mwait_check(void) 548 { 549 /* 550 * Check whether the system is DMI table. If yes, OSPM 551 * should not use mwait for CPU-states. 552 */ 553 dmi_check_system(acpi_proc_quirk_mwait_dmi_table); 554 } 555