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sys/dev/acpica/acpi_video.c
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1 /*- 2 * Copyright (c) 2002-2003 Taku YAMAMOTO <taku@cent.saitama-u.ac.jp> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: acpi_vid.c,v 1.4 2003/10/13 10:07:36 taku Exp $ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_evdev.h" 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/eventhandler.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/power.h> 41 #include <sys/queue.h> 42 #include <sys/sysctl.h> 43 44 #include <contrib/dev/acpica/include/acpi.h> 45 46 #include <dev/acpica/acpivar.h> 47 48 #ifdef EVDEV_SUPPORT 49 #include <dev/evdev/input.h> 50 #include <dev/evdev/evdev.h> 51 #endif 52 53 /* ACPI video extension driver. */ 54 struct acpi_video_output { 55 ACPI_HANDLE handle; 56 UINT32 adr; 57 STAILQ_ENTRY(acpi_video_output) vo_next; 58 struct { 59 int num; 60 STAILQ_ENTRY(acpi_video_output) next; 61 } vo_unit; 62 int vo_hasbqc; /* Query method is present. */ 63 int vo_level; /* Cached level when !vo_hasbqc. */ 64 int vo_brightness; 65 int vo_fullpower; 66 int vo_economy; 67 int vo_numlevels; 68 int *vo_levels; 69 struct sysctl_ctx_list vo_sysctl_ctx; 70 struct sysctl_oid *vo_sysctl_tree; 71 #ifdef EVDEV_SUPPORT 72 struct evdev_dev *evdev; 73 #endif 74 }; 75 76 STAILQ_HEAD(acpi_video_output_queue, acpi_video_output); 77 78 struct acpi_video_softc { 79 device_t device; 80 ACPI_HANDLE handle; 81 struct acpi_video_output_queue vid_outputs; 82 eventhandler_tag vid_pwr_evh; 83 #ifdef EVDEV_SUPPORT 84 struct evdev_dev *evdev; 85 #endif 86 }; 87 88 /* interfaces */ 89 static int acpi_video_modevent(struct module*, int, void *); 90 static void acpi_video_identify(driver_t *driver, device_t parent); 91 static int acpi_video_probe(device_t); 92 static int acpi_video_attach(device_t); 93 static int acpi_video_detach(device_t); 94 static int acpi_video_resume(device_t); 95 static int acpi_video_shutdown(device_t); 96 static void acpi_video_notify_handler(ACPI_HANDLE, UINT32, void *); 97 static void acpi_video_power_profile(void *); 98 static void acpi_video_bind_outputs(struct acpi_video_softc *); 99 static struct acpi_video_output *acpi_video_vo_init(UINT32); 100 static void acpi_video_vo_bind(struct acpi_video_output *, ACPI_HANDLE); 101 static void acpi_video_vo_destroy(struct acpi_video_output *); 102 static int acpi_video_vo_check_level(struct acpi_video_output *, int); 103 static void acpi_video_vo_notify_handler(ACPI_HANDLE, UINT32, void *); 104 static int acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS); 105 static int acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS); 106 static int acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS); 107 static int acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS); 108 109 /* operations */ 110 static void vid_set_switch_policy(ACPI_HANDLE, UINT32); 111 static int vid_enum_outputs(ACPI_HANDLE, 112 void(*)(ACPI_HANDLE, UINT32, void *), void *); 113 static int vo_get_brightness_levels(ACPI_HANDLE, int **); 114 static int vo_get_brightness(struct acpi_video_output *); 115 static void vo_set_brightness(struct acpi_video_output *, int); 116 static UINT32 vo_get_device_status(ACPI_HANDLE); 117 static UINT32 vo_get_graphics_state(ACPI_HANDLE); 118 static void vo_set_device_state(ACPI_HANDLE, UINT32); 119 120 /* events */ 121 #define VID_NOTIFY_SWITCHED 0x80 122 #define VID_NOTIFY_REPROBE 0x81 123 #define VID_NOTIFY_CYCLE_OUT 0x82 124 #define VID_NOTIFY_NEXT_OUT 0x83 125 #define VID_NOTIFY_PREV_OUT 0x84 126 #define VID_NOTIFY_CYCLE_BRN 0x85 127 #define VID_NOTIFY_INC_BRN 0x86 128 #define VID_NOTIFY_DEC_BRN 0x87 129 #define VID_NOTIFY_ZERO_BRN 0x88 130 #define VID_NOTIFY_DISP_OFF 0x89 131 132 /* _DOS (Enable/Disable Output Switching) argument bits */ 133 #define DOS_SWITCH_MASK 3 134 #define DOS_SWITCH_BY_OSPM 0 135 #define DOS_SWITCH_BY_BIOS 1 136 #define DOS_SWITCH_LOCKED 2 137 #define DOS_BRIGHTNESS_BY_OSPM (1 << 2) 138 139 /* _DOD and subdev's _ADR */ 140 #define DOD_DEVID_MASK 0x0f00 141 #define DOD_DEVID_MASK_FULL 0xffff 142 #define DOD_DEVID_MASK_DISPIDX 0x000f 143 #define DOD_DEVID_MASK_DISPPORT 0x00f0 144 #define DOD_DEVID_MONITOR 0x0100 145 #define DOD_DEVID_LCD 0x0110 146 #define DOD_DEVID_TV 0x0200 147 #define DOD_DEVID_EXT 0x0300 148 #define DOD_DEVID_INTDFP 0x0400 149 #define DOD_BIOS (1 << 16) 150 #define DOD_NONVGA (1 << 17) 151 #define DOD_HEAD_ID_SHIFT 18 152 #define DOD_HEAD_ID_BITS 3 153 #define DOD_HEAD_ID_MASK \ 154 (((1 << DOD_HEAD_ID_BITS) - 1) << DOD_HEAD_ID_SHIFT) 155 #define DOD_DEVID_SCHEME_STD (1U << 31) 156 157 /* _BCL related constants */ 158 #define BCL_FULLPOWER 0 159 #define BCL_ECONOMY 1 160 161 /* _DCS (Device Currrent Status) value bits and masks. */ 162 #define DCS_EXISTS (1 << 0) 163 #define DCS_ACTIVE (1 << 1) 164 #define DCS_READY (1 << 2) 165 #define DCS_FUNCTIONAL (1 << 3) 166 #define DCS_ATTACHED (1 << 4) 167 168 /* _DSS (Device Set Status) argument bits and masks. */ 169 #define DSS_INACTIVE 0 170 #define DSS_ACTIVE (1 << 0) 171 #define DSS_SETNEXT (1 << 30) 172 #define DSS_COMMIT (1U << 31) 173 174 static device_method_t acpi_video_methods[] = { 175 DEVMETHOD(device_identify, acpi_video_identify), 176 DEVMETHOD(device_probe, acpi_video_probe), 177 DEVMETHOD(device_attach, acpi_video_attach), 178 DEVMETHOD(device_detach, acpi_video_detach), 179 DEVMETHOD(device_resume, acpi_video_resume), 180 DEVMETHOD(device_shutdown, acpi_video_shutdown), 181 { 0, 0 } 182 }; 183 184 static driver_t acpi_video_driver = { 185 "acpi_video", 186 acpi_video_methods, 187 sizeof(struct acpi_video_softc), 188 }; 189 190 DRIVER_MODULE(acpi_video, vgapci, acpi_video_driver, acpi_video_modevent, NULL); 191 MODULE_DEPEND(acpi_video, acpi, 1, 1, 1); 192 #ifdef EVDEV_SUPPORT 193 MODULE_DEPEND(acpi_video, evdev, 1, 1, 1); 194 #endif 195 196 static struct sysctl_ctx_list acpi_video_sysctl_ctx; 197 static struct sysctl_oid *acpi_video_sysctl_tree; 198 static struct acpi_video_output_queue crt_units, tv_units, 199 ext_units, lcd_units, other_units; 200 201 /* 202 * The 'video' lock protects the hierarchy of video output devices 203 * (the video "bus"). The 'video_output' lock protects per-output 204 * data is equivalent to a softc lock for each video output. 205 */ 206 ACPI_SERIAL_DECL(video, "ACPI video"); 207 ACPI_SERIAL_DECL(video_output, "ACPI video output"); 208 static MALLOC_DEFINE(M_ACPIVIDEO, "acpivideo", "ACPI video extension"); 209 210 #ifdef EVDEV_SUPPORT 211 static const struct { 212 UINT32 notify; 213 uint16_t key; 214 } acpi_video_evdev_map[] = { 215 { VID_NOTIFY_SWITCHED, KEY_SWITCHVIDEOMODE }, 216 { VID_NOTIFY_REPROBE, KEY_SWITCHVIDEOMODE }, 217 { VID_NOTIFY_CYCLE_OUT, KEY_SWITCHVIDEOMODE }, 218 { VID_NOTIFY_NEXT_OUT, KEY_VIDEO_NEXT }, 219 { VID_NOTIFY_PREV_OUT, KEY_VIDEO_PREV }, 220 { VID_NOTIFY_CYCLE_BRN, KEY_BRIGHTNESS_CYCLE }, 221 { VID_NOTIFY_INC_BRN, KEY_BRIGHTNESSUP }, 222 { VID_NOTIFY_DEC_BRN, KEY_BRIGHTNESSDOWN }, 223 { VID_NOTIFY_ZERO_BRN, KEY_BRIGHTNESS_ZERO }, 224 { VID_NOTIFY_DISP_OFF, KEY_DISPLAY_OFF }, 225 }; 226 227 static void 228 acpi_video_push_evdev_event(struct evdev_dev *evdev, UINT32 notify) 229 { 230 int i; 231 uint16_t key; 232 233 /* Do not allow to execute 2 instances this routine concurrently */ 234 ACPI_SERIAL_ASSERT(video_output); 235 236 for (i = 0; i < nitems(acpi_video_evdev_map); i++) { 237 if (acpi_video_evdev_map[i].notify == notify) { 238 key = acpi_video_evdev_map[i].key; 239 evdev_push_key(evdev, key, 1); 240 evdev_sync(evdev); 241 evdev_push_key(evdev, key, 0); 242 evdev_sync(evdev); 243 break; 244 } 245 } 246 } 247 #endif 248 249 static int 250 acpi_video_modevent(struct module *mod __unused, int evt, void *cookie __unused) 251 { 252 int err; 253 254 err = 0; 255 switch (evt) { 256 case MOD_LOAD: 257 sysctl_ctx_init(&acpi_video_sysctl_ctx); 258 STAILQ_INIT(&crt_units); 259 STAILQ_INIT(&tv_units); 260 STAILQ_INIT(&ext_units); 261 STAILQ_INIT(&lcd_units); 262 STAILQ_INIT(&other_units); 263 break; 264 case MOD_UNLOAD: 265 sysctl_ctx_free(&acpi_video_sysctl_ctx); 266 acpi_video_sysctl_tree = NULL; 267 break; 268 default: 269 err = EINVAL; 270 } 271 272 return (err); 273 } 274 275 static void 276 acpi_video_identify(driver_t *driver, device_t parent) 277 { 278 279 if (device_find_child(parent, "acpi_video", -1) == NULL) 280 device_add_child(parent, "acpi_video", -1); 281 } 282 283 static int 284 acpi_video_probe(device_t dev) 285 { 286 ACPI_HANDLE devh, h; 287 ACPI_OBJECT_TYPE t_dos; 288 289 devh = acpi_get_handle(dev); 290 if (acpi_disabled("video") || 291 ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) || 292 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h)) || 293 ACPI_FAILURE(AcpiGetType(h, &t_dos)) || 294 t_dos != ACPI_TYPE_METHOD) 295 return (ENXIO); 296 297 device_set_desc(dev, "ACPI video extension"); 298 return (0); 299 } 300 301 static int 302 acpi_video_attach(device_t dev) 303 { 304 struct acpi_softc *acpi_sc; 305 struct acpi_video_softc *sc; 306 #ifdef EVDEV_SUPPORT 307 int i; 308 #endif 309 310 sc = device_get_softc(dev); 311 312 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0); 313 if (acpi_sc == NULL) 314 return (ENXIO); 315 316 #ifdef EVDEV_SUPPORT 317 sc->evdev = evdev_alloc(); 318 evdev_set_name(sc->evdev, device_get_desc(dev)); 319 evdev_set_phys(sc->evdev, device_get_nameunit(dev)); 320 evdev_set_id(sc->evdev, BUS_HOST, 0, 0, 1); 321 evdev_support_event(sc->evdev, EV_SYN); 322 evdev_support_event(sc->evdev, EV_KEY); 323 for (i = 0; i < nitems(acpi_video_evdev_map); i++) 324 evdev_support_key(sc->evdev, acpi_video_evdev_map[i].key); 325 326 if (evdev_register(sc->evdev) != 0) 327 return (ENXIO); 328 #endif 329 330 ACPI_SERIAL_BEGIN(video); 331 if (acpi_video_sysctl_tree == NULL) { 332 acpi_video_sysctl_tree = SYSCTL_ADD_NODE(&acpi_video_sysctl_ctx, 333 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, 334 "video", CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 335 "video extension control"); 336 } 337 ACPI_SERIAL_END(video); 338 339 sc->device = dev; 340 sc->handle = acpi_get_handle(dev); 341 STAILQ_INIT(&sc->vid_outputs); 342 343 AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY, 344 acpi_video_notify_handler, sc); 345 sc->vid_pwr_evh = EVENTHANDLER_REGISTER(power_profile_change, 346 acpi_video_power_profile, sc, 0); 347 348 ACPI_SERIAL_BEGIN(video); 349 acpi_video_bind_outputs(sc); 350 ACPI_SERIAL_END(video); 351 352 /* 353 * Notify the BIOS that we want to switch both active outputs and 354 * brightness levels. 355 */ 356 vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_OSPM | 357 DOS_BRIGHTNESS_BY_OSPM); 358 359 acpi_video_power_profile(sc); 360 361 return (0); 362 } 363 364 static int 365 acpi_video_detach(device_t dev) 366 { 367 struct acpi_video_softc *sc; 368 struct acpi_video_output *vo, *vn; 369 370 sc = device_get_softc(dev); 371 372 vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_BIOS); 373 EVENTHANDLER_DEREGISTER(power_profile_change, sc->vid_pwr_evh); 374 AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY, 375 acpi_video_notify_handler); 376 377 ACPI_SERIAL_BEGIN(video); 378 STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vn) { 379 acpi_video_vo_destroy(vo); 380 } 381 ACPI_SERIAL_END(video); 382 383 #ifdef EVDEV_SUPPORT 384 evdev_free(sc->evdev); 385 #endif 386 387 return (0); 388 } 389 390 static int 391 acpi_video_resume(device_t dev) 392 { 393 struct acpi_video_softc *sc; 394 struct acpi_video_output *vo, *vn; 395 int level; 396 397 sc = device_get_softc(dev); 398 399 /* Restore brightness level */ 400 ACPI_SERIAL_BEGIN(video); 401 ACPI_SERIAL_BEGIN(video_output); 402 STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vn) { 403 if ((vo->adr & DOD_DEVID_MASK_FULL) != DOD_DEVID_LCD && 404 (vo->adr & DOD_DEVID_MASK) != DOD_DEVID_INTDFP) 405 continue; 406 407 if ((vo_get_device_status(vo->handle) & DCS_ACTIVE) == 0) 408 continue; 409 410 level = vo_get_brightness(vo); 411 if (level != -1) 412 vo_set_brightness(vo, level); 413 } 414 ACPI_SERIAL_END(video_output); 415 ACPI_SERIAL_END(video); 416 417 return (0); 418 } 419 420 static int 421 acpi_video_shutdown(device_t dev) 422 { 423 struct acpi_video_softc *sc; 424 425 sc = device_get_softc(dev); 426 vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_BIOS); 427 428 return (0); 429 } 430 431 static void 432 acpi_video_invoke_event_handler(void *context) 433 { 434 EVENTHANDLER_INVOKE(acpi_video_event, (int)(intptr_t)context); 435 } 436 437 static void 438 acpi_video_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 439 { 440 struct acpi_video_softc *sc; 441 struct acpi_video_output *vo, *vo_tmp; 442 ACPI_HANDLE lasthand; 443 UINT32 dcs, dss, dss_p; 444 445 sc = (struct acpi_video_softc *)context; 446 447 switch (notify) { 448 case VID_NOTIFY_SWITCHED: 449 dss_p = 0; 450 lasthand = NULL; 451 ACPI_SERIAL_BEGIN(video); 452 ACPI_SERIAL_BEGIN(video_output); 453 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) { 454 dss = vo_get_graphics_state(vo->handle); 455 dcs = vo_get_device_status(vo->handle); 456 if (!(dcs & DCS_READY)) 457 dss = DSS_INACTIVE; 458 if (((dcs & DCS_ACTIVE) && dss == DSS_INACTIVE) || 459 (!(dcs & DCS_ACTIVE) && dss == DSS_ACTIVE)) { 460 if (lasthand != NULL) 461 vo_set_device_state(lasthand, dss_p); 462 dss_p = dss; 463 lasthand = vo->handle; 464 } 465 } 466 if (lasthand != NULL) 467 vo_set_device_state(lasthand, dss_p|DSS_COMMIT); 468 ACPI_SERIAL_END(video_output); 469 ACPI_SERIAL_END(video); 470 break; 471 case VID_NOTIFY_REPROBE: 472 ACPI_SERIAL_BEGIN(video); 473 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) 474 vo->handle = NULL; 475 acpi_video_bind_outputs(sc); 476 STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vo_tmp) { 477 if (vo->handle == NULL) { 478 STAILQ_REMOVE(&sc->vid_outputs, vo, 479 acpi_video_output, vo_next); 480 acpi_video_vo_destroy(vo); 481 } 482 } 483 ACPI_SERIAL_END(video); 484 break; 485 /* Next events should not appear if DOS_SWITCH_BY_OSPM policy is set */ 486 case VID_NOTIFY_CYCLE_OUT: 487 case VID_NOTIFY_NEXT_OUT: 488 case VID_NOTIFY_PREV_OUT: 489 default: 490 device_printf(sc->device, "unknown notify event 0x%x\n", 491 notify); 492 } 493 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_video_invoke_event_handler, 494 (void *)(uintptr_t)notify); 495 #ifdef EVDEV_SUPPORT 496 ACPI_SERIAL_BEGIN(video_output); 497 acpi_video_push_evdev_event(sc->evdev, notify); 498 ACPI_SERIAL_END(video_output); 499 #endif 500 } 501 502 static void 503 acpi_video_power_profile(void *context) 504 { 505 int state; 506 struct acpi_video_softc *sc; 507 struct acpi_video_output *vo; 508 509 sc = context; 510 state = power_profile_get_state(); 511 if (state != POWER_PROFILE_PERFORMANCE && 512 state != POWER_PROFILE_ECONOMY) 513 return; 514 515 ACPI_SERIAL_BEGIN(video); 516 ACPI_SERIAL_BEGIN(video_output); 517 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) { 518 if (vo->vo_levels != NULL && vo->vo_brightness == -1) 519 vo_set_brightness(vo, 520 state == POWER_PROFILE_ECONOMY ? 521 vo->vo_economy : vo->vo_fullpower); 522 } 523 ACPI_SERIAL_END(video_output); 524 ACPI_SERIAL_END(video); 525 } 526 527 static void 528 acpi_video_bind_outputs_subr(ACPI_HANDLE handle, UINT32 adr, void *context) 529 { 530 struct acpi_video_softc *sc; 531 struct acpi_video_output *vo; 532 533 ACPI_SERIAL_ASSERT(video); 534 sc = context; 535 536 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) { 537 if (vo->adr == adr) { 538 acpi_video_vo_bind(vo, handle); 539 return; 540 } 541 } 542 vo = acpi_video_vo_init(adr); 543 if (vo != NULL) { 544 #ifdef EVDEV_SUPPORT 545 vo->evdev = sc->evdev; 546 #endif 547 acpi_video_vo_bind(vo, handle); 548 STAILQ_INSERT_TAIL(&sc->vid_outputs, vo, vo_next); 549 } 550 } 551 552 static void 553 acpi_video_bind_outputs(struct acpi_video_softc *sc) 554 { 555 556 ACPI_SERIAL_ASSERT(video); 557 vid_enum_outputs(sc->handle, acpi_video_bind_outputs_subr, sc); 558 } 559 560 static struct acpi_video_output * 561 acpi_video_vo_init(UINT32 adr) 562 { 563 struct acpi_video_output *vn, *vo, *vp; 564 int n, x; 565 char name[8], env[32]; 566 const char *type, *desc; 567 struct acpi_video_output_queue *voqh; 568 569 ACPI_SERIAL_ASSERT(video); 570 571 switch (adr & DOD_DEVID_MASK) { 572 case DOD_DEVID_MONITOR: 573 if ((adr & DOD_DEVID_MASK_FULL) == DOD_DEVID_LCD) { 574 /* DOD_DEVID_LCD is a common, backward compatible ID */ 575 desc = "Internal/Integrated Digital Flat Panel"; 576 type = "lcd"; 577 voqh = &lcd_units; 578 } else { 579 desc = "VGA CRT or VESA Compatible Analog Monitor"; 580 type = "crt"; 581 voqh = &crt_units; 582 } 583 break; 584 case DOD_DEVID_TV: 585 desc = "TV/HDTV or Analog-Video Monitor"; 586 type = "tv"; 587 voqh = &tv_units; 588 break; 589 case DOD_DEVID_EXT: 590 desc = "External Digital Monitor"; 591 type = "ext"; 592 voqh = &ext_units; 593 break; 594 case DOD_DEVID_INTDFP: 595 desc = "Internal/Integrated Digital Flat Panel"; 596 type = "lcd"; 597 voqh = &lcd_units; 598 break; 599 default: 600 desc = "unknown output"; 601 type = "out"; 602 voqh = &other_units; 603 } 604 605 n = 0; 606 vp = NULL; 607 STAILQ_FOREACH(vn, voqh, vo_unit.next) { 608 if (vn->vo_unit.num != n) 609 break; 610 vp = vn; 611 n++; 612 } 613 614 snprintf(name, sizeof(name), "%s%d", type, n); 615 616 vo = malloc(sizeof(*vo), M_ACPIVIDEO, M_NOWAIT); 617 if (vo != NULL) { 618 vo->handle = NULL; 619 vo->adr = adr; 620 vo->vo_unit.num = n; 621 vo->vo_hasbqc = -1; 622 vo->vo_level = -1; 623 vo->vo_brightness = -1; 624 vo->vo_fullpower = -1; /* TODO: override with tunables */ 625 vo->vo_economy = -1; 626 vo->vo_numlevels = 0; 627 vo->vo_levels = NULL; 628 snprintf(env, sizeof(env), "hw.acpi.video.%s.fullpower", name); 629 if (getenv_int(env, &x)) 630 vo->vo_fullpower = x; 631 snprintf(env, sizeof(env), "hw.acpi.video.%s.economy", name); 632 if (getenv_int(env, &x)) 633 vo->vo_economy = x; 634 635 sysctl_ctx_init(&vo->vo_sysctl_ctx); 636 if (vp != NULL) 637 STAILQ_INSERT_AFTER(voqh, vp, vo, vo_unit.next); 638 else 639 STAILQ_INSERT_TAIL(voqh, vo, vo_unit.next); 640 if (acpi_video_sysctl_tree != NULL) 641 vo->vo_sysctl_tree = 642 SYSCTL_ADD_NODE(&vo->vo_sysctl_ctx, 643 SYSCTL_CHILDREN(acpi_video_sysctl_tree), 644 OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE, 645 0, desc); 646 if (vo->vo_sysctl_tree != NULL) { 647 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx, 648 SYSCTL_CHILDREN(vo->vo_sysctl_tree), 649 OID_AUTO, "active", 650 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo, 651 0, acpi_video_vo_active_sysctl, "I", 652 "current activity of this device"); 653 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx, 654 SYSCTL_CHILDREN(vo->vo_sysctl_tree), 655 OID_AUTO, "brightness", 656 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo, 657 0, acpi_video_vo_bright_sysctl, "I", 658 "current brightness level"); 659 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx, 660 SYSCTL_CHILDREN(vo->vo_sysctl_tree), 661 OID_AUTO, "fullpower", 662 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo, 663 POWER_PROFILE_PERFORMANCE, 664 acpi_video_vo_presets_sysctl, "I", 665 "preset level for full power mode"); 666 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx, 667 SYSCTL_CHILDREN(vo->vo_sysctl_tree), 668 OID_AUTO, "economy", 669 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo, 670 POWER_PROFILE_ECONOMY, 671 acpi_video_vo_presets_sysctl, "I", 672 "preset level for economy mode"); 673 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx, 674 SYSCTL_CHILDREN(vo->vo_sysctl_tree), 675 OID_AUTO, "levels", 676 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, vo, 677 0, acpi_video_vo_levels_sysctl, "I", 678 "supported brightness levels"); 679 } else 680 printf("%s: sysctl node creation failed\n", type); 681 } else 682 printf("%s: softc allocation failed\n", type); 683 684 if (bootverbose) { 685 printf("found %s(%x)", desc, adr & DOD_DEVID_MASK_FULL); 686 printf(", idx#%x", adr & DOD_DEVID_MASK_DISPIDX); 687 printf(", port#%x", (adr & DOD_DEVID_MASK_DISPPORT) >> 4); 688 if (adr & DOD_BIOS) 689 printf(", detectable by BIOS"); 690 if (adr & DOD_NONVGA) 691 printf(" (Non-VGA output device whose power " 692 "is related to the VGA device)"); 693 printf(", head #%d\n", 694 (adr & DOD_HEAD_ID_MASK) >> DOD_HEAD_ID_SHIFT); 695 } 696 return (vo); 697 } 698 699 static void 700 acpi_video_vo_bind(struct acpi_video_output *vo, ACPI_HANDLE handle) 701 { 702 703 ACPI_SERIAL_BEGIN(video_output); 704 if (vo->vo_levels != NULL) { 705 AcpiRemoveNotifyHandler(vo->handle, ACPI_DEVICE_NOTIFY, 706 acpi_video_vo_notify_handler); 707 AcpiOsFree(vo->vo_levels); 708 vo->vo_levels = NULL; 709 } 710 vo->handle = handle; 711 vo->vo_numlevels = vo_get_brightness_levels(handle, &vo->vo_levels); 712 if (vo->vo_numlevels >= 2) { 713 if (vo->vo_fullpower == -1 || 714 acpi_video_vo_check_level(vo, vo->vo_fullpower) != 0) { 715 /* XXX - can't deal with rebinding... */ 716 vo->vo_fullpower = vo->vo_levels[BCL_FULLPOWER]; 717 } 718 if (vo->vo_economy == -1 || 719 acpi_video_vo_check_level(vo, vo->vo_economy) != 0) { 720 /* XXX - see above. */ 721 vo->vo_economy = vo->vo_levels[BCL_ECONOMY]; 722 } 723 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, 724 acpi_video_vo_notify_handler, vo); 725 } 726 ACPI_SERIAL_END(video_output); 727 } 728 729 static void 730 acpi_video_vo_destroy(struct acpi_video_output *vo) 731 { 732 struct acpi_video_output_queue *voqh; 733 734 ACPI_SERIAL_ASSERT(video); 735 if (vo->vo_sysctl_tree != NULL) { 736 vo->vo_sysctl_tree = NULL; 737 sysctl_ctx_free(&vo->vo_sysctl_ctx); 738 } 739 if (vo->vo_levels != NULL) { 740 AcpiRemoveNotifyHandler(vo->handle, ACPI_DEVICE_NOTIFY, 741 acpi_video_vo_notify_handler); 742 AcpiOsFree(vo->vo_levels); 743 } 744 745 switch (vo->adr & DOD_DEVID_MASK) { 746 case DOD_DEVID_MONITOR: 747 if ((vo->adr & DOD_DEVID_MASK_FULL) == DOD_DEVID_LCD) 748 voqh = &lcd_units; 749 else 750 voqh = &crt_units; 751 break; 752 case DOD_DEVID_TV: 753 voqh = &tv_units; 754 break; 755 case DOD_DEVID_EXT: 756 voqh = &ext_units; 757 break; 758 case DOD_DEVID_INTDFP: 759 voqh = &lcd_units; 760 break; 761 default: 762 voqh = &other_units; 763 } 764 STAILQ_REMOVE(voqh, vo, acpi_video_output, vo_unit.next); 765 free(vo, M_ACPIVIDEO); 766 } 767 768 static int 769 acpi_video_vo_check_level(struct acpi_video_output *vo, int level) 770 { 771 int i; 772 773 ACPI_SERIAL_ASSERT(video_output); 774 if (vo->vo_levels == NULL) 775 return (ENODEV); 776 for (i = 0; i < vo->vo_numlevels; i++) 777 if (vo->vo_levels[i] == level) 778 return (0); 779 return (EINVAL); 780 } 781 782 static void 783 acpi_video_vo_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 784 { 785 struct acpi_video_output *vo; 786 int i, j, level, new_level; 787 788 vo = context; 789 ACPI_SERIAL_BEGIN(video_output); 790 if (vo->handle != handle) 791 goto out; 792 793 switch (notify) { 794 case VID_NOTIFY_CYCLE_BRN: 795 if (vo->vo_numlevels <= 3) 796 goto out; 797 /* FALLTHROUGH */ 798 case VID_NOTIFY_INC_BRN: 799 case VID_NOTIFY_DEC_BRN: 800 case VID_NOTIFY_ZERO_BRN: 801 case VID_NOTIFY_DISP_OFF: 802 if (vo->vo_levels == NULL) 803 goto out; 804 level = vo_get_brightness(vo); 805 if (level < 0) 806 goto out; 807 break; 808 default: 809 printf("unknown notify event 0x%x from %s\n", 810 notify, acpi_name(handle)); 811 goto out; 812 } 813 814 new_level = level; 815 switch (notify) { 816 case VID_NOTIFY_CYCLE_BRN: 817 for (i = 2; i < vo->vo_numlevels; i++) 818 if (vo->vo_levels[i] == level) { 819 new_level = vo->vo_numlevels > i + 1 ? 820 vo->vo_levels[i + 1] : vo->vo_levels[2]; 821 break; 822 } 823 break; 824 case VID_NOTIFY_INC_BRN: 825 case VID_NOTIFY_DEC_BRN: 826 for (i = 0; i < vo->vo_numlevels; i++) { 827 j = vo->vo_levels[i]; 828 if (notify == VID_NOTIFY_INC_BRN) { 829 if (j > level && 830 (j < new_level || level == new_level)) 831 new_level = j; 832 } else { 833 if (j < level && 834 (j > new_level || level == new_level)) 835 new_level = j; 836 } 837 } 838 break; 839 case VID_NOTIFY_ZERO_BRN: 840 for (i = 0; i < vo->vo_numlevels; i++) 841 if (vo->vo_levels[i] == 0) { 842 new_level = 0; 843 break; 844 } 845 break; 846 case VID_NOTIFY_DISP_OFF: 847 acpi_pwr_switch_consumer(handle, ACPI_STATE_D3); 848 break; 849 } 850 if (new_level != level) { 851 vo_set_brightness(vo, new_level); 852 vo->vo_brightness = new_level; 853 } 854 #ifdef EVDEV_SUPPORT 855 acpi_video_push_evdev_event(vo->evdev, notify); 856 #endif 857 858 out: 859 ACPI_SERIAL_END(video_output); 860 861 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_video_invoke_event_handler, 862 (void *)(uintptr_t)notify); 863 } 864 865 /* ARGSUSED */ 866 static int 867 acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS) 868 { 869 struct acpi_video_output *vo; 870 int state, err; 871 872 vo = (struct acpi_video_output *)arg1; 873 if (vo->handle == NULL) 874 return (ENXIO); 875 ACPI_SERIAL_BEGIN(video_output); 876 state = (vo_get_device_status(vo->handle) & DCS_ACTIVE) ? 1 : 0; 877 err = sysctl_handle_int(oidp, &state, 0, req); 878 if (err != 0 || req->newptr == NULL) 879 goto out; 880 vo_set_device_state(vo->handle, 881 DSS_COMMIT | (state ? DSS_ACTIVE : DSS_INACTIVE)); 882 out: 883 ACPI_SERIAL_END(video_output); 884 return (err); 885 } 886 887 /* ARGSUSED */ 888 static int 889 acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS) 890 { 891 struct acpi_video_output *vo; 892 int level, preset, err; 893 894 vo = (struct acpi_video_output *)arg1; 895 ACPI_SERIAL_BEGIN(video_output); 896 if (vo->handle == NULL) { 897 err = ENXIO; 898 goto out; 899 } 900 if (vo->vo_levels == NULL) { 901 err = ENODEV; 902 goto out; 903 } 904 905 preset = (power_profile_get_state() == POWER_PROFILE_ECONOMY) ? 906 vo->vo_economy : vo->vo_fullpower; 907 level = vo->vo_brightness; 908 if (level == -1) 909 level = preset; 910 911 err = sysctl_handle_int(oidp, &level, 0, req); 912 if (err != 0 || req->newptr == NULL) 913 goto out; 914 if (level < -1 || level > 100) { 915 err = EINVAL; 916 goto out; 917 } 918 919 if (level != -1 && (err = acpi_video_vo_check_level(vo, level))) 920 goto out; 921 vo->vo_brightness = level; 922 vo_set_brightness(vo, (level == -1) ? preset : level); 923 924 out: 925 ACPI_SERIAL_END(video_output); 926 return (err); 927 } 928 929 static int 930 acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS) 931 { 932 struct acpi_video_output *vo; 933 int i, level, *preset, err; 934 935 vo = (struct acpi_video_output *)arg1; 936 ACPI_SERIAL_BEGIN(video_output); 937 if (vo->handle == NULL) { 938 err = ENXIO; 939 goto out; 940 } 941 if (vo->vo_levels == NULL) { 942 err = ENODEV; 943 goto out; 944 } 945 preset = (arg2 == POWER_PROFILE_ECONOMY) ? 946 &vo->vo_economy : &vo->vo_fullpower; 947 level = *preset; 948 err = sysctl_handle_int(oidp, &level, 0, req); 949 if (err != 0 || req->newptr == NULL) 950 goto out; 951 if (level < -1 || level > 100) { 952 err = EINVAL; 953 goto out; 954 } 955 if (level == -1) { 956 i = (arg2 == POWER_PROFILE_ECONOMY) ? 957 BCL_ECONOMY : BCL_FULLPOWER; 958 level = vo->vo_levels[i]; 959 } else if ((err = acpi_video_vo_check_level(vo, level)) != 0) 960 goto out; 961 962 if (vo->vo_brightness == -1 && (power_profile_get_state() == arg2)) 963 vo_set_brightness(vo, level); 964 *preset = level; 965 966 out: 967 ACPI_SERIAL_END(video_output); 968 return (err); 969 } 970 971 /* ARGSUSED */ 972 static int 973 acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS) 974 { 975 struct acpi_video_output *vo; 976 int err; 977 978 vo = (struct acpi_video_output *)arg1; 979 ACPI_SERIAL_BEGIN(video_output); 980 if (vo->vo_levels == NULL) { 981 err = ENODEV; 982 goto out; 983 } 984 if (req->newptr != NULL) { 985 err = EPERM; 986 goto out; 987 } 988 err = sysctl_handle_opaque(oidp, vo->vo_levels, 989 vo->vo_numlevels * sizeof(*vo->vo_levels), req); 990 991 out: 992 ACPI_SERIAL_END(video_output); 993 return (err); 994 } 995 996 static void 997 vid_set_switch_policy(ACPI_HANDLE handle, UINT32 policy) 998 { 999 ACPI_STATUS status; 1000 1001 status = acpi_SetInteger(handle, "_DOS", policy); 1002 if (ACPI_FAILURE(status)) 1003 printf("can't evaluate %s._DOS - %s\n", 1004 acpi_name(handle), AcpiFormatException(status)); 1005 } 1006 1007 struct enum_callback_arg { 1008 void (*callback)(ACPI_HANDLE, UINT32, void *); 1009 void *context; 1010 ACPI_OBJECT *dod_pkg; 1011 int count; 1012 }; 1013 1014 static ACPI_STATUS 1015 vid_enum_outputs_subr(ACPI_HANDLE handle, UINT32 level __unused, 1016 void *context, void **retp __unused) 1017 { 1018 ACPI_STATUS status; 1019 UINT32 adr, val; 1020 struct enum_callback_arg *argset; 1021 size_t i; 1022 1023 ACPI_SERIAL_ASSERT(video); 1024 argset = context; 1025 status = acpi_GetInteger(handle, "_ADR", &adr); 1026 if (ACPI_FAILURE(status)) 1027 return (AE_OK); 1028 1029 for (i = 0; i < argset->dod_pkg->Package.Count; i++) { 1030 if (acpi_PkgInt32(argset->dod_pkg, i, &val) == 0 && 1031 (val & DOD_DEVID_MASK_FULL) == 1032 (adr & DOD_DEVID_MASK_FULL)) { 1033 argset->callback(handle, val, argset->context); 1034 argset->count++; 1035 } 1036 } 1037 1038 return (AE_OK); 1039 } 1040 1041 static int 1042 vid_enum_outputs(ACPI_HANDLE handle, 1043 void (*callback)(ACPI_HANDLE, UINT32, void *), void *context) 1044 { 1045 ACPI_STATUS status; 1046 ACPI_BUFFER dod_buf; 1047 ACPI_OBJECT *res; 1048 struct enum_callback_arg argset; 1049 1050 ACPI_SERIAL_ASSERT(video); 1051 dod_buf.Length = ACPI_ALLOCATE_BUFFER; 1052 dod_buf.Pointer = NULL; 1053 status = AcpiEvaluateObject(handle, "_DOD", NULL, &dod_buf); 1054 if (ACPI_FAILURE(status)) { 1055 if (status != AE_NOT_FOUND) 1056 printf("can't evaluate %s._DOD - %s\n", 1057 acpi_name(handle), AcpiFormatException(status)); 1058 argset.count = -1; 1059 goto out; 1060 } 1061 res = (ACPI_OBJECT *)dod_buf.Pointer; 1062 if (!ACPI_PKG_VALID(res, 1)) { 1063 printf("evaluation of %s._DOD makes no sense\n", 1064 acpi_name(handle)); 1065 argset.count = -1; 1066 goto out; 1067 } 1068 if (callback == NULL) { 1069 argset.count = res->Package.Count; 1070 goto out; 1071 } 1072 argset.callback = callback; 1073 argset.context = context; 1074 argset.dod_pkg = res; 1075 argset.count = 0; 1076 status = AcpiWalkNamespace(ACPI_TYPE_DEVICE, handle, 1, 1077 vid_enum_outputs_subr, NULL, &argset, NULL); 1078 if (ACPI_FAILURE(status)) 1079 printf("failed walking down %s - %s\n", 1080 acpi_name(handle), AcpiFormatException(status)); 1081 out: 1082 if (dod_buf.Pointer != NULL) 1083 AcpiOsFree(dod_buf.Pointer); 1084 return (argset.count); 1085 } 1086 1087 static int 1088 vo_get_brightness_levels(ACPI_HANDLE handle, int **levelp) 1089 { 1090 ACPI_STATUS status; 1091 ACPI_BUFFER bcl_buf; 1092 ACPI_OBJECT *res; 1093 int num, i, n, *levels; 1094 1095 bcl_buf.Length = ACPI_ALLOCATE_BUFFER; 1096 bcl_buf.Pointer = NULL; 1097 status = AcpiEvaluateObject(handle, "_BCL", NULL, &bcl_buf); 1098 if (ACPI_FAILURE(status)) { 1099 if (status != AE_NOT_FOUND) 1100 printf("can't evaluate %s._BCL - %s\n", 1101 acpi_name(handle), AcpiFormatException(status)); 1102 goto out; 1103 } 1104 res = (ACPI_OBJECT *)bcl_buf.Pointer; 1105 if (!ACPI_PKG_VALID(res, 2)) { 1106 printf("evaluation of %s._BCL makes no sense\n", 1107 acpi_name(handle)); 1108 goto out; 1109 } 1110 num = res->Package.Count; 1111 if (num < 2 || levelp == NULL) 1112 goto out; 1113 levels = AcpiOsAllocate(num * sizeof(*levels)); 1114 if (levels == NULL) 1115 goto out; 1116 for (i = 0, n = 0; i < num; i++) 1117 if (acpi_PkgInt32(res, i, &levels[n]) == 0) 1118 n++; 1119 if (n < 2) { 1120 AcpiOsFree(levels); 1121 goto out; 1122 } 1123 *levelp = levels; 1124 return (n); 1125 1126 out: 1127 if (bcl_buf.Pointer != NULL) 1128 AcpiOsFree(bcl_buf.Pointer); 1129 return (0); 1130 } 1131 1132 static int 1133 vo_get_bqc(struct acpi_video_output *vo, UINT32 *level) 1134 { 1135 ACPI_STATUS status; 1136 1137 switch (vo->vo_hasbqc) { 1138 case 1: 1139 case -1: 1140 status = acpi_GetInteger(vo->handle, "_BQC", level); 1141 if (vo->vo_hasbqc == 1) 1142 break; 1143 vo->vo_hasbqc = status != AE_NOT_FOUND; 1144 if (vo->vo_hasbqc == 1) 1145 break; 1146 /* FALLTHROUGH */ 1147 default: 1148 KASSERT(vo->vo_hasbqc == 0, 1149 ("bad vo_hasbqc state %d", vo->vo_hasbqc)); 1150 *level = vo->vo_level; 1151 status = AE_OK; 1152 } 1153 return (status); 1154 } 1155 1156 static int 1157 vo_get_brightness(struct acpi_video_output *vo) 1158 { 1159 UINT32 level; 1160 ACPI_STATUS status; 1161 1162 ACPI_SERIAL_ASSERT(video_output); 1163 status = vo_get_bqc(vo, &level); 1164 if (ACPI_FAILURE(status)) { 1165 printf("can't evaluate %s._BQC - %s\n", acpi_name(vo->handle), 1166 AcpiFormatException(status)); 1167 return (-1); 1168 } 1169 if (level > 100) 1170 return (-1); 1171 1172 return (level); 1173 } 1174 1175 static void 1176 vo_set_brightness(struct acpi_video_output *vo, int level) 1177 { 1178 char notify_buf[16]; 1179 ACPI_STATUS status; 1180 1181 ACPI_SERIAL_ASSERT(video_output); 1182 status = acpi_SetInteger(vo->handle, "_BCM", level); 1183 if (ACPI_FAILURE(status)) { 1184 printf("can't evaluate %s._BCM - %s\n", 1185 acpi_name(vo->handle), AcpiFormatException(status)); 1186 } else { 1187 vo->vo_level = level; 1188 } 1189 snprintf(notify_buf, sizeof(notify_buf), "notify=%d", level); 1190 devctl_notify("ACPI", "Video", "brightness", notify_buf); 1191 } 1192 1193 static UINT32 1194 vo_get_device_status(ACPI_HANDLE handle) 1195 { 1196 UINT32 dcs; 1197 ACPI_STATUS status; 1198 1199 ACPI_SERIAL_ASSERT(video_output); 1200 dcs = 0; 1201 status = acpi_GetInteger(handle, "_DCS", &dcs); 1202 if (ACPI_FAILURE(status)) { 1203 /* 1204 * If the method is missing, assume that the device is always 1205 * operational. 1206 */ 1207 if (status != AE_NOT_FOUND) { 1208 printf("can't evaluate %s._DCS - %s\n", 1209 acpi_name(handle), AcpiFormatException(status)); 1210 } else { 1211 dcs = 0xff; 1212 } 1213 } 1214 1215 return (dcs); 1216 } 1217 1218 static UINT32 1219 vo_get_graphics_state(ACPI_HANDLE handle) 1220 { 1221 UINT32 dgs; 1222 ACPI_STATUS status; 1223 1224 dgs = 0; 1225 status = acpi_GetInteger(handle, "_DGS", &dgs); 1226 if (ACPI_FAILURE(status)) { 1227 /* 1228 * If the method is missing, assume that the device is always 1229 * operational. 1230 */ 1231 if (status != AE_NOT_FOUND) { 1232 printf("can't evaluate %s._DGS - %s\n", 1233 acpi_name(handle), AcpiFormatException(status)); 1234 } else { 1235 dgs = 0xff; 1236 } 1237 } 1238 1239 return (dgs); 1240 } 1241 1242 static void 1243 vo_set_device_state(ACPI_HANDLE handle, UINT32 state) 1244 { 1245 ACPI_STATUS status; 1246 1247 ACPI_SERIAL_ASSERT(video_output); 1248 status = acpi_SetInteger(handle, "_DSS", state); 1249 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 1250 printf("can't evaluate %s._DSS - %s\n", 1251 acpi_name(handle), AcpiFormatException(status)); 1252 }
Cache object: e812e6beb797925b34bde9bd39924f79
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