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 #include "opt_evdev.h"
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/eventhandler.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/power.h>
39 #include <sys/queue.h>
40 #include <sys/sysctl.h>
41
42 #include <contrib/dev/acpica/include/acpi.h>
43
44 #include <dev/acpica/acpivar.h>
45
46 #ifdef EVDEV_SUPPORT
47 #include <dev/evdev/input.h>
48 #include <dev/evdev/evdev.h>
49 #endif
50
51 /* ACPI video extension driver. */
52 struct acpi_video_output {
53 ACPI_HANDLE handle;
54 UINT32 adr;
55 STAILQ_ENTRY(acpi_video_output) vo_next;
56 struct {
57 int num;
58 STAILQ_ENTRY(acpi_video_output) next;
59 } vo_unit;
60 int vo_hasbqc; /* Query method is present. */
61 int vo_level; /* Cached level when !vo_hasbqc. */
62 int vo_brightness;
63 int vo_fullpower;
64 int vo_economy;
65 int vo_numlevels;
66 int *vo_levels;
67 struct sysctl_ctx_list vo_sysctl_ctx;
68 struct sysctl_oid *vo_sysctl_tree;
69 #ifdef EVDEV_SUPPORT
70 struct evdev_dev *evdev;
71 #endif
72 };
73
74 STAILQ_HEAD(acpi_video_output_queue, acpi_video_output);
75
76 struct acpi_video_softc {
77 device_t device;
78 ACPI_HANDLE handle;
79 struct acpi_video_output_queue vid_outputs;
80 eventhandler_tag vid_pwr_evh;
81 #ifdef EVDEV_SUPPORT
82 struct evdev_dev *evdev;
83 #endif
84 };
85
86 /* interfaces */
87 static int acpi_video_modevent(struct module*, int, void *);
88 static void acpi_video_identify(driver_t *driver, device_t parent);
89 static int acpi_video_probe(device_t);
90 static int acpi_video_attach(device_t);
91 static int acpi_video_detach(device_t);
92 static int acpi_video_resume(device_t);
93 static int acpi_video_shutdown(device_t);
94 static void acpi_video_notify_handler(ACPI_HANDLE, UINT32, void *);
95 static void acpi_video_power_profile(void *);
96 static void acpi_video_bind_outputs(struct acpi_video_softc *);
97 static struct acpi_video_output *acpi_video_vo_init(UINT32);
98 static void acpi_video_vo_bind(struct acpi_video_output *, ACPI_HANDLE);
99 static void acpi_video_vo_destroy(struct acpi_video_output *);
100 static int acpi_video_vo_check_level(struct acpi_video_output *, int);
101 static void acpi_video_vo_notify_handler(ACPI_HANDLE, UINT32, void *);
102 static int acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS);
103 static int acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS);
104 static int acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS);
105 static int acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS);
106
107 /* operations */
108 static void vid_set_switch_policy(ACPI_HANDLE, UINT32);
109 static int vid_enum_outputs(ACPI_HANDLE,
110 void(*)(ACPI_HANDLE, UINT32, void *), void *);
111 static int vo_get_brightness_levels(ACPI_HANDLE, int **);
112 static int vo_get_brightness(struct acpi_video_output *);
113 static void vo_set_brightness(struct acpi_video_output *, int);
114 static UINT32 vo_get_device_status(ACPI_HANDLE);
115 static UINT32 vo_get_graphics_state(ACPI_HANDLE);
116 static void vo_set_device_state(ACPI_HANDLE, UINT32);
117
118 /* events */
119 #define VID_NOTIFY_SWITCHED 0x80
120 #define VID_NOTIFY_REPROBE 0x81
121 #define VID_NOTIFY_CYCLE_OUT 0x82
122 #define VID_NOTIFY_NEXT_OUT 0x83
123 #define VID_NOTIFY_PREV_OUT 0x84
124 #define VID_NOTIFY_CYCLE_BRN 0x85
125 #define VID_NOTIFY_INC_BRN 0x86
126 #define VID_NOTIFY_DEC_BRN 0x87
127 #define VID_NOTIFY_ZERO_BRN 0x88
128 #define VID_NOTIFY_DISP_OFF 0x89
129
130 /* _DOS (Enable/Disable Output Switching) argument bits */
131 #define DOS_SWITCH_MASK 3
132 #define DOS_SWITCH_BY_OSPM 0
133 #define DOS_SWITCH_BY_BIOS 1
134 #define DOS_SWITCH_LOCKED 2
135 #define DOS_BRIGHTNESS_BY_OSPM (1 << 2)
136
137 /* _DOD and subdev's _ADR */
138 #define DOD_DEVID_MASK 0x0f00
139 #define DOD_DEVID_MASK_FULL 0xffff
140 #define DOD_DEVID_MASK_DISPIDX 0x000f
141 #define DOD_DEVID_MASK_DISPPORT 0x00f0
142 #define DOD_DEVID_MONITOR 0x0100
143 #define DOD_DEVID_LCD 0x0110
144 #define DOD_DEVID_TV 0x0200
145 #define DOD_DEVID_EXT 0x0300
146 #define DOD_DEVID_INTDFP 0x0400
147 #define DOD_BIOS (1 << 16)
148 #define DOD_NONVGA (1 << 17)
149 #define DOD_HEAD_ID_SHIFT 18
150 #define DOD_HEAD_ID_BITS 3
151 #define DOD_HEAD_ID_MASK \
152 (((1 << DOD_HEAD_ID_BITS) - 1) << DOD_HEAD_ID_SHIFT)
153 #define DOD_DEVID_SCHEME_STD (1U << 31)
154
155 /* _BCL related constants */
156 #define BCL_FULLPOWER 0
157 #define BCL_ECONOMY 1
158
159 /* _DCS (Device Currrent Status) value bits and masks. */
160 #define DCS_EXISTS (1 << 0)
161 #define DCS_ACTIVE (1 << 1)
162 #define DCS_READY (1 << 2)
163 #define DCS_FUNCTIONAL (1 << 3)
164 #define DCS_ATTACHED (1 << 4)
165
166 /* _DSS (Device Set Status) argument bits and masks. */
167 #define DSS_INACTIVE 0
168 #define DSS_ACTIVE (1 << 0)
169 #define DSS_SETNEXT (1 << 30)
170 #define DSS_COMMIT (1U << 31)
171
172 static device_method_t acpi_video_methods[] = {
173 DEVMETHOD(device_identify, acpi_video_identify),
174 DEVMETHOD(device_probe, acpi_video_probe),
175 DEVMETHOD(device_attach, acpi_video_attach),
176 DEVMETHOD(device_detach, acpi_video_detach),
177 DEVMETHOD(device_resume, acpi_video_resume),
178 DEVMETHOD(device_shutdown, acpi_video_shutdown),
179 { 0, 0 }
180 };
181
182 static driver_t acpi_video_driver = {
183 "acpi_video",
184 acpi_video_methods,
185 sizeof(struct acpi_video_softc),
186 };
187
188 static devclass_t acpi_video_devclass;
189
190 DRIVER_MODULE(acpi_video, vgapci, acpi_video_driver, acpi_video_devclass,
191 acpi_video_modevent, NULL);
192 MODULE_DEPEND(acpi_video, acpi, 1, 1, 1);
193 #ifdef EVDEV_SUPPORT
194 MODULE_DEPEND(acpi_video, evdev, 1, 1, 1);
195 #endif
196
197 static struct sysctl_ctx_list acpi_video_sysctl_ctx;
198 static struct sysctl_oid *acpi_video_sysctl_tree;
199 static struct acpi_video_output_queue crt_units, tv_units,
200 ext_units, lcd_units, other_units;
201
202 /*
203 * The 'video' lock protects the hierarchy of video output devices
204 * (the video "bus"). The 'video_output' lock protects per-output
205 * data is equivalent to a softc lock for each video output.
206 */
207 ACPI_SERIAL_DECL(video, "ACPI video");
208 ACPI_SERIAL_DECL(video_output, "ACPI video output");
209 static MALLOC_DEFINE(M_ACPIVIDEO, "acpivideo", "ACPI video extension");
210
211 #ifdef EVDEV_SUPPORT
212 static const struct {
213 UINT32 notify;
214 uint16_t key;
215 } acpi_video_evdev_map[] = {
216 { VID_NOTIFY_SWITCHED, KEY_SWITCHVIDEOMODE },
217 { VID_NOTIFY_REPROBE, KEY_SWITCHVIDEOMODE },
218 { VID_NOTIFY_CYCLE_OUT, KEY_SWITCHVIDEOMODE },
219 { VID_NOTIFY_NEXT_OUT, KEY_VIDEO_NEXT },
220 { VID_NOTIFY_PREV_OUT, KEY_VIDEO_PREV },
221 { VID_NOTIFY_CYCLE_BRN, KEY_BRIGHTNESS_CYCLE },
222 { VID_NOTIFY_INC_BRN, KEY_BRIGHTNESSUP },
223 { VID_NOTIFY_DEC_BRN, KEY_BRIGHTNESSDOWN },
224 { VID_NOTIFY_ZERO_BRN, KEY_BRIGHTNESS_ZERO },
225 { VID_NOTIFY_DISP_OFF, KEY_DISPLAY_OFF },
226 };
227
228 static void
acpi_video_push_evdev_event(struct evdev_dev * evdev,UINT32 notify)229 acpi_video_push_evdev_event(struct evdev_dev *evdev, UINT32 notify)
230 {
231 int i;
232 uint16_t key;
233
234 /* Do not allow to execute 2 instances this routine concurrently */
235 ACPI_SERIAL_ASSERT(video_output);
236
237 for (i = 0; i < nitems(acpi_video_evdev_map); i++) {
238 if (acpi_video_evdev_map[i].notify == notify) {
239 key = acpi_video_evdev_map[i].key;
240 evdev_push_key(evdev, key, 1);
241 evdev_sync(evdev);
242 evdev_push_key(evdev, key, 0);
243 evdev_sync(evdev);
244 break;
245 }
246 }
247 }
248 #endif
249
250 static int
acpi_video_modevent(struct module * mod __unused,int evt,void * cookie __unused)251 acpi_video_modevent(struct module *mod __unused, int evt, void *cookie __unused)
252 {
253 int err;
254
255 err = 0;
256 switch (evt) {
257 case MOD_LOAD:
258 sysctl_ctx_init(&acpi_video_sysctl_ctx);
259 STAILQ_INIT(&crt_units);
260 STAILQ_INIT(&tv_units);
261 STAILQ_INIT(&ext_units);
262 STAILQ_INIT(&lcd_units);
263 STAILQ_INIT(&other_units);
264 break;
265 case MOD_UNLOAD:
266 sysctl_ctx_free(&acpi_video_sysctl_ctx);
267 acpi_video_sysctl_tree = NULL;
268 break;
269 default:
270 err = EINVAL;
271 }
272
273 return (err);
274 }
275
276 static void
acpi_video_identify(driver_t * driver,device_t parent)277 acpi_video_identify(driver_t *driver, device_t parent)
278 {
279
280 if (device_find_child(parent, "acpi_video", -1) == NULL)
281 device_add_child(parent, "acpi_video", -1);
282 }
283
284 static int
acpi_video_probe(device_t dev)285 acpi_video_probe(device_t dev)
286 {
287 ACPI_HANDLE devh, h;
288 ACPI_OBJECT_TYPE t_dos;
289
290 devh = acpi_get_handle(dev);
291 if (acpi_disabled("video") ||
292 ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
293 ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h)) ||
294 ACPI_FAILURE(AcpiGetType(h, &t_dos)) ||
295 t_dos != ACPI_TYPE_METHOD)
296 return (ENXIO);
297
298 device_set_desc(dev, "ACPI video extension");
299 return (0);
300 }
301
302 static int
acpi_video_attach(device_t dev)303 acpi_video_attach(device_t dev)
304 {
305 struct acpi_softc *acpi_sc;
306 struct acpi_video_softc *sc;
307 #ifdef EVDEV_SUPPORT
308 int i;
309 #endif
310
311 sc = device_get_softc(dev);
312
313 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
314 if (acpi_sc == NULL)
315 return (ENXIO);
316
317 #ifdef EVDEV_SUPPORT
318 sc->evdev = evdev_alloc();
319 evdev_set_name(sc->evdev, device_get_desc(dev));
320 evdev_set_phys(sc->evdev, device_get_nameunit(dev));
321 evdev_set_id(sc->evdev, BUS_HOST, 0, 0, 1);
322 evdev_support_event(sc->evdev, EV_SYN);
323 evdev_support_event(sc->evdev, EV_KEY);
324 for (i = 0; i < nitems(acpi_video_evdev_map); i++)
325 evdev_support_key(sc->evdev, acpi_video_evdev_map[i].key);
326
327 if (evdev_register(sc->evdev) != 0)
328 return (ENXIO);
329 #endif
330
331 ACPI_SERIAL_BEGIN(video);
332 if (acpi_video_sysctl_tree == NULL) {
333 acpi_video_sysctl_tree = SYSCTL_ADD_NODE(&acpi_video_sysctl_ctx,
334 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
335 "video", CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
336 "video extension control");
337 }
338 ACPI_SERIAL_END(video);
339
340 sc->device = dev;
341 sc->handle = acpi_get_handle(dev);
342 STAILQ_INIT(&sc->vid_outputs);
343
344 AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
345 acpi_video_notify_handler, sc);
346 sc->vid_pwr_evh = EVENTHANDLER_REGISTER(power_profile_change,
347 acpi_video_power_profile, sc, 0);
348
349 ACPI_SERIAL_BEGIN(video);
350 acpi_video_bind_outputs(sc);
351 ACPI_SERIAL_END(video);
352
353 /*
354 * Notify the BIOS that we want to switch both active outputs and
355 * brightness levels.
356 */
357 vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_OSPM |
358 DOS_BRIGHTNESS_BY_OSPM);
359
360 acpi_video_power_profile(sc);
361
362 return (0);
363 }
364
365 static int
acpi_video_detach(device_t dev)366 acpi_video_detach(device_t dev)
367 {
368 struct acpi_video_softc *sc;
369 struct acpi_video_output *vo, *vn;
370
371 sc = device_get_softc(dev);
372
373 vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_BIOS);
374 EVENTHANDLER_DEREGISTER(power_profile_change, sc->vid_pwr_evh);
375 AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
376 acpi_video_notify_handler);
377
378 ACPI_SERIAL_BEGIN(video);
379 STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vn) {
380 acpi_video_vo_destroy(vo);
381 }
382 ACPI_SERIAL_END(video);
383
384 #ifdef EVDEV_SUPPORT
385 evdev_free(sc->evdev);
386 #endif
387
388 return (0);
389 }
390
391 static int
acpi_video_resume(device_t dev)392 acpi_video_resume(device_t dev)
393 {
394 struct acpi_video_softc *sc;
395 struct acpi_video_output *vo, *vn;
396 int level;
397
398 sc = device_get_softc(dev);
399
400 /* Restore brightness level */
401 ACPI_SERIAL_BEGIN(video);
402 ACPI_SERIAL_BEGIN(video_output);
403 STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vn) {
404 if ((vo->adr & DOD_DEVID_MASK_FULL) != DOD_DEVID_LCD &&
405 (vo->adr & DOD_DEVID_MASK) != DOD_DEVID_INTDFP)
406 continue;
407
408 if ((vo_get_device_status(vo->handle) & DCS_ACTIVE) == 0)
409 continue;
410
411 level = vo_get_brightness(vo);
412 if (level != -1)
413 vo_set_brightness(vo, level);
414 }
415 ACPI_SERIAL_END(video_output);
416 ACPI_SERIAL_END(video);
417
418 return (0);
419 }
420
421 static int
acpi_video_shutdown(device_t dev)422 acpi_video_shutdown(device_t dev)
423 {
424 struct acpi_video_softc *sc;
425
426 sc = device_get_softc(dev);
427 vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_BIOS);
428
429 return (0);
430 }
431
432 static void
acpi_video_invoke_event_handler(void * context)433 acpi_video_invoke_event_handler(void *context)
434 {
435 EVENTHANDLER_INVOKE(acpi_video_event, (int)(intptr_t)context);
436 }
437
438 static void
acpi_video_notify_handler(ACPI_HANDLE handle,UINT32 notify,void * context)439 acpi_video_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
440 {
441 struct acpi_video_softc *sc;
442 struct acpi_video_output *vo, *vo_tmp;
443 ACPI_HANDLE lasthand;
444 UINT32 dcs, dss, dss_p;
445
446 sc = (struct acpi_video_softc *)context;
447
448 switch (notify) {
449 case VID_NOTIFY_SWITCHED:
450 dss_p = 0;
451 lasthand = NULL;
452 ACPI_SERIAL_BEGIN(video);
453 ACPI_SERIAL_BEGIN(video_output);
454 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) {
455 dss = vo_get_graphics_state(vo->handle);
456 dcs = vo_get_device_status(vo->handle);
457 if (!(dcs & DCS_READY))
458 dss = DSS_INACTIVE;
459 if (((dcs & DCS_ACTIVE) && dss == DSS_INACTIVE) ||
460 (!(dcs & DCS_ACTIVE) && dss == DSS_ACTIVE)) {
461 if (lasthand != NULL)
462 vo_set_device_state(lasthand, dss_p);
463 dss_p = dss;
464 lasthand = vo->handle;
465 }
466 }
467 if (lasthand != NULL)
468 vo_set_device_state(lasthand, dss_p|DSS_COMMIT);
469 ACPI_SERIAL_END(video_output);
470 ACPI_SERIAL_END(video);
471 break;
472 case VID_NOTIFY_REPROBE:
473 ACPI_SERIAL_BEGIN(video);
474 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next)
475 vo->handle = NULL;
476 acpi_video_bind_outputs(sc);
477 STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vo_tmp) {
478 if (vo->handle == NULL) {
479 STAILQ_REMOVE(&sc->vid_outputs, vo,
480 acpi_video_output, vo_next);
481 acpi_video_vo_destroy(vo);
482 }
483 }
484 ACPI_SERIAL_END(video);
485 break;
486 /* Next events should not appear if DOS_SWITCH_BY_OSPM policy is set */
487 case VID_NOTIFY_CYCLE_OUT:
488 case VID_NOTIFY_NEXT_OUT:
489 case VID_NOTIFY_PREV_OUT:
490 default:
491 device_printf(sc->device, "unknown notify event 0x%x\n",
492 notify);
493 }
494 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_video_invoke_event_handler,
495 (void *)(uintptr_t)notify);
496 #ifdef EVDEV_SUPPORT
497 ACPI_SERIAL_BEGIN(video_output);
498 acpi_video_push_evdev_event(sc->evdev, notify);
499 ACPI_SERIAL_END(video_output);
500 #endif
501 }
502
503 static void
acpi_video_power_profile(void * context)504 acpi_video_power_profile(void *context)
505 {
506 int state;
507 struct acpi_video_softc *sc;
508 struct acpi_video_output *vo;
509
510 sc = context;
511 state = power_profile_get_state();
512 if (state != POWER_PROFILE_PERFORMANCE &&
513 state != POWER_PROFILE_ECONOMY)
514 return;
515
516 ACPI_SERIAL_BEGIN(video);
517 ACPI_SERIAL_BEGIN(video_output);
518 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) {
519 if (vo->vo_levels != NULL && vo->vo_brightness == -1)
520 vo_set_brightness(vo,
521 state == POWER_PROFILE_ECONOMY ?
522 vo->vo_economy : vo->vo_fullpower);
523 }
524 ACPI_SERIAL_END(video_output);
525 ACPI_SERIAL_END(video);
526 }
527
528 static void
acpi_video_bind_outputs_subr(ACPI_HANDLE handle,UINT32 adr,void * context)529 acpi_video_bind_outputs_subr(ACPI_HANDLE handle, UINT32 adr, void *context)
530 {
531 struct acpi_video_softc *sc;
532 struct acpi_video_output *vo;
533
534 ACPI_SERIAL_ASSERT(video);
535 sc = context;
536
537 STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) {
538 if (vo->adr == adr) {
539 acpi_video_vo_bind(vo, handle);
540 return;
541 }
542 }
543 vo = acpi_video_vo_init(adr);
544 if (vo != NULL) {
545 #ifdef EVDEV_SUPPORT
546 vo->evdev = sc->evdev;
547 #endif
548 acpi_video_vo_bind(vo, handle);
549 STAILQ_INSERT_TAIL(&sc->vid_outputs, vo, vo_next);
550 }
551 }
552
553 static void
acpi_video_bind_outputs(struct acpi_video_softc * sc)554 acpi_video_bind_outputs(struct acpi_video_softc *sc)
555 {
556
557 ACPI_SERIAL_ASSERT(video);
558 vid_enum_outputs(sc->handle, acpi_video_bind_outputs_subr, sc);
559 }
560
561 static struct acpi_video_output *
acpi_video_vo_init(UINT32 adr)562 acpi_video_vo_init(UINT32 adr)
563 {
564 struct acpi_video_output *vn, *vo, *vp;
565 int n, x;
566 char name[8], env[32];
567 const char *type, *desc;
568 struct acpi_video_output_queue *voqh;
569
570 ACPI_SERIAL_ASSERT(video);
571
572 switch (adr & DOD_DEVID_MASK) {
573 case DOD_DEVID_MONITOR:
574 if ((adr & DOD_DEVID_MASK_FULL) == DOD_DEVID_LCD) {
575 /* DOD_DEVID_LCD is a common, backward compatible ID */
576 desc = "Internal/Integrated Digital Flat Panel";
577 type = "lcd";
578 voqh = &lcd_units;
579 } else {
580 desc = "VGA CRT or VESA Compatible Analog Monitor";
581 type = "crt";
582 voqh = &crt_units;
583 }
584 break;
585 case DOD_DEVID_TV:
586 desc = "TV/HDTV or Analog-Video Monitor";
587 type = "tv";
588 voqh = &tv_units;
589 break;
590 case DOD_DEVID_EXT:
591 desc = "External Digital Monitor";
592 type = "ext";
593 voqh = &ext_units;
594 break;
595 case DOD_DEVID_INTDFP:
596 desc = "Internal/Integrated Digital Flat Panel";
597 type = "lcd";
598 voqh = &lcd_units;
599 break;
600 default:
601 desc = "unknown output";
602 type = "out";
603 voqh = &other_units;
604 }
605
606 n = 0;
607 vp = NULL;
608 STAILQ_FOREACH(vn, voqh, vo_unit.next) {
609 if (vn->vo_unit.num != n)
610 break;
611 vp = vn;
612 n++;
613 }
614
615 snprintf(name, sizeof(name), "%s%d", type, n);
616
617 vo = malloc(sizeof(*vo), M_ACPIVIDEO, M_NOWAIT);
618 if (vo != NULL) {
619 vo->handle = NULL;
620 vo->adr = adr;
621 vo->vo_unit.num = n;
622 vo->vo_hasbqc = -1;
623 vo->vo_level = -1;
624 vo->vo_brightness = -1;
625 vo->vo_fullpower = -1; /* TODO: override with tunables */
626 vo->vo_economy = -1;
627 vo->vo_numlevels = 0;
628 vo->vo_levels = NULL;
629 snprintf(env, sizeof(env), "hw.acpi.video.%s.fullpower", name);
630 if (getenv_int(env, &x))
631 vo->vo_fullpower = x;
632 snprintf(env, sizeof(env), "hw.acpi.video.%s.economy", name);
633 if (getenv_int(env, &x))
634 vo->vo_economy = x;
635
636 sysctl_ctx_init(&vo->vo_sysctl_ctx);
637 if (vp != NULL)
638 STAILQ_INSERT_AFTER(voqh, vp, vo, vo_unit.next);
639 else
640 STAILQ_INSERT_TAIL(voqh, vo, vo_unit.next);
641 if (acpi_video_sysctl_tree != NULL)
642 vo->vo_sysctl_tree =
643 SYSCTL_ADD_NODE(&vo->vo_sysctl_ctx,
644 SYSCTL_CHILDREN(acpi_video_sysctl_tree),
645 OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE,
646 0, desc);
647 if (vo->vo_sysctl_tree != NULL) {
648 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
649 SYSCTL_CHILDREN(vo->vo_sysctl_tree),
650 OID_AUTO, "active",
651 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo,
652 0, acpi_video_vo_active_sysctl, "I",
653 "current activity of this device");
654 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
655 SYSCTL_CHILDREN(vo->vo_sysctl_tree),
656 OID_AUTO, "brightness",
657 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo,
658 0, acpi_video_vo_bright_sysctl, "I",
659 "current brightness level");
660 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
661 SYSCTL_CHILDREN(vo->vo_sysctl_tree),
662 OID_AUTO, "fullpower",
663 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo,
664 POWER_PROFILE_PERFORMANCE,
665 acpi_video_vo_presets_sysctl, "I",
666 "preset level for full power mode");
667 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
668 SYSCTL_CHILDREN(vo->vo_sysctl_tree),
669 OID_AUTO, "economy",
670 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vo,
671 POWER_PROFILE_ECONOMY,
672 acpi_video_vo_presets_sysctl, "I",
673 "preset level for economy mode");
674 SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
675 SYSCTL_CHILDREN(vo->vo_sysctl_tree),
676 OID_AUTO, "levels",
677 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, vo,
678 0, acpi_video_vo_levels_sysctl, "I",
679 "supported brightness levels");
680 } else
681 printf("%s: sysctl node creation failed\n", type);
682 } else
683 printf("%s: softc allocation failed\n", type);
684
685 if (bootverbose) {
686 printf("found %s(%x)", desc, adr & DOD_DEVID_MASK_FULL);
687 printf(", idx#%x", adr & DOD_DEVID_MASK_DISPIDX);
688 printf(", port#%x", (adr & DOD_DEVID_MASK_DISPPORT) >> 4);
689 if (adr & DOD_BIOS)
690 printf(", detectable by BIOS");
691 if (adr & DOD_NONVGA)
692 printf(" (Non-VGA output device whose power "
693 "is related to the VGA device)");
694 printf(", head #%d\n",
695 (adr & DOD_HEAD_ID_MASK) >> DOD_HEAD_ID_SHIFT);
696 }
697 return (vo);
698 }
699
700 static void
acpi_video_vo_bind(struct acpi_video_output * vo,ACPI_HANDLE handle)701 acpi_video_vo_bind(struct acpi_video_output *vo, ACPI_HANDLE handle)
702 {
703
704 ACPI_SERIAL_BEGIN(video_output);
705 if (vo->vo_levels != NULL) {
706 AcpiRemoveNotifyHandler(vo->handle, ACPI_DEVICE_NOTIFY,
707 acpi_video_vo_notify_handler);
708 AcpiOsFree(vo->vo_levels);
709 vo->vo_levels = NULL;
710 }
711 vo->handle = handle;
712 vo->vo_numlevels = vo_get_brightness_levels(handle, &vo->vo_levels);
713 if (vo->vo_numlevels >= 2) {
714 if (vo->vo_fullpower == -1 ||
715 acpi_video_vo_check_level(vo, vo->vo_fullpower) != 0) {
716 /* XXX - can't deal with rebinding... */
717 vo->vo_fullpower = vo->vo_levels[BCL_FULLPOWER];
718 }
719 if (vo->vo_economy == -1 ||
720 acpi_video_vo_check_level(vo, vo->vo_economy) != 0) {
721 /* XXX - see above. */
722 vo->vo_economy = vo->vo_levels[BCL_ECONOMY];
723 }
724 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
725 acpi_video_vo_notify_handler, vo);
726 }
727 ACPI_SERIAL_END(video_output);
728 }
729
730 static void
acpi_video_vo_destroy(struct acpi_video_output * vo)731 acpi_video_vo_destroy(struct acpi_video_output *vo)
732 {
733 struct acpi_video_output_queue *voqh;
734
735 ACPI_SERIAL_ASSERT(video);
736 if (vo->vo_sysctl_tree != NULL) {
737 vo->vo_sysctl_tree = NULL;
738 sysctl_ctx_free(&vo->vo_sysctl_ctx);
739 }
740 if (vo->vo_levels != NULL) {
741 AcpiRemoveNotifyHandler(vo->handle, ACPI_DEVICE_NOTIFY,
742 acpi_video_vo_notify_handler);
743 AcpiOsFree(vo->vo_levels);
744 }
745
746 switch (vo->adr & DOD_DEVID_MASK) {
747 case DOD_DEVID_MONITOR:
748 if ((vo->adr & DOD_DEVID_MASK_FULL) == DOD_DEVID_LCD)
749 voqh = &lcd_units;
750 else
751 voqh = &crt_units;
752 break;
753 case DOD_DEVID_TV:
754 voqh = &tv_units;
755 break;
756 case DOD_DEVID_EXT:
757 voqh = &ext_units;
758 break;
759 case DOD_DEVID_INTDFP:
760 voqh = &lcd_units;
761 break;
762 default:
763 voqh = &other_units;
764 }
765 STAILQ_REMOVE(voqh, vo, acpi_video_output, vo_unit.next);
766 free(vo, M_ACPIVIDEO);
767 }
768
769 static int
acpi_video_vo_check_level(struct acpi_video_output * vo,int level)770 acpi_video_vo_check_level(struct acpi_video_output *vo, int level)
771 {
772 int i;
773
774 ACPI_SERIAL_ASSERT(video_output);
775 if (vo->vo_levels == NULL)
776 return (ENODEV);
777 for (i = 0; i < vo->vo_numlevels; i++)
778 if (vo->vo_levels[i] == level)
779 return (0);
780 return (EINVAL);
781 }
782
783 static void
acpi_video_vo_notify_handler(ACPI_HANDLE handle,UINT32 notify,void * context)784 acpi_video_vo_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
785 {
786 struct acpi_video_output *vo;
787 int i, j, level, new_level;
788
789 vo = context;
790 ACPI_SERIAL_BEGIN(video_output);
791 if (vo->handle != handle)
792 goto out;
793
794 switch (notify) {
795 case VID_NOTIFY_CYCLE_BRN:
796 if (vo->vo_numlevels <= 3)
797 goto out;
798 /* FALLTHROUGH */
799 case VID_NOTIFY_INC_BRN:
800 case VID_NOTIFY_DEC_BRN:
801 case VID_NOTIFY_ZERO_BRN:
802 case VID_NOTIFY_DISP_OFF:
803 if (vo->vo_levels == NULL)
804 goto out;
805 level = vo_get_brightness(vo);
806 if (level < 0)
807 goto out;
808 break;
809 default:
810 printf("unknown notify event 0x%x from %s\n",
811 notify, acpi_name(handle));
812 goto out;
813 }
814
815 new_level = level;
816 switch (notify) {
817 case VID_NOTIFY_CYCLE_BRN:
818 for (i = 2; i < vo->vo_numlevels; i++)
819 if (vo->vo_levels[i] == level) {
820 new_level = vo->vo_numlevels > i + 1 ?
821 vo->vo_levels[i + 1] : vo->vo_levels[2];
822 break;
823 }
824 break;
825 case VID_NOTIFY_INC_BRN:
826 case VID_NOTIFY_DEC_BRN:
827 for (i = 0; i < vo->vo_numlevels; i++) {
828 j = vo->vo_levels[i];
829 if (notify == VID_NOTIFY_INC_BRN) {
830 if (j > level &&
831 (j < new_level || level == new_level))
832 new_level = j;
833 } else {
834 if (j < level &&
835 (j > new_level || level == new_level))
836 new_level = j;
837 }
838 }
839 break;
840 case VID_NOTIFY_ZERO_BRN:
841 for (i = 0; i < vo->vo_numlevels; i++)
842 if (vo->vo_levels[i] == 0) {
843 new_level = 0;
844 break;
845 }
846 break;
847 case VID_NOTIFY_DISP_OFF:
848 acpi_pwr_switch_consumer(handle, ACPI_STATE_D3);
849 break;
850 }
851 if (new_level != level) {
852 vo_set_brightness(vo, new_level);
853 vo->vo_brightness = new_level;
854 }
855 #ifdef EVDEV_SUPPORT
856 acpi_video_push_evdev_event(vo->evdev, notify);
857 #endif
858
859 out:
860 ACPI_SERIAL_END(video_output);
861
862 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_video_invoke_event_handler,
863 (void *)(uintptr_t)notify);
864 }
865
866 /* ARGSUSED */
867 static int
acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS)868 acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS)
869 {
870 struct acpi_video_output *vo;
871 int state, err;
872
873 vo = (struct acpi_video_output *)arg1;
874 if (vo->handle == NULL)
875 return (ENXIO);
876 ACPI_SERIAL_BEGIN(video_output);
877 state = (vo_get_device_status(vo->handle) & DCS_ACTIVE) ? 1 : 0;
878 err = sysctl_handle_int(oidp, &state, 0, req);
879 if (err != 0 || req->newptr == NULL)
880 goto out;
881 vo_set_device_state(vo->handle,
882 DSS_COMMIT | (state ? DSS_ACTIVE : DSS_INACTIVE));
883 out:
884 ACPI_SERIAL_END(video_output);
885 return (err);
886 }
887
888 /* ARGSUSED */
889 static int
acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS)890 acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS)
891 {
892 struct acpi_video_output *vo;
893 int level, preset, err;
894
895 vo = (struct acpi_video_output *)arg1;
896 ACPI_SERIAL_BEGIN(video_output);
897 if (vo->handle == NULL) {
898 err = ENXIO;
899 goto out;
900 }
901 if (vo->vo_levels == NULL) {
902 err = ENODEV;
903 goto out;
904 }
905
906 preset = (power_profile_get_state() == POWER_PROFILE_ECONOMY) ?
907 vo->vo_economy : vo->vo_fullpower;
908 level = vo->vo_brightness;
909 if (level == -1)
910 level = preset;
911
912 err = sysctl_handle_int(oidp, &level, 0, req);
913 if (err != 0 || req->newptr == NULL)
914 goto out;
915 if (level < -1 || level > 100) {
916 err = EINVAL;
917 goto out;
918 }
919
920 if (level != -1 && (err = acpi_video_vo_check_level(vo, level)))
921 goto out;
922 vo->vo_brightness = level;
923 vo_set_brightness(vo, (level == -1) ? preset : level);
924
925 out:
926 ACPI_SERIAL_END(video_output);
927 return (err);
928 }
929
930 static int
acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS)931 acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS)
932 {
933 struct acpi_video_output *vo;
934 int i, level, *preset, err;
935
936 vo = (struct acpi_video_output *)arg1;
937 ACPI_SERIAL_BEGIN(video_output);
938 if (vo->handle == NULL) {
939 err = ENXIO;
940 goto out;
941 }
942 if (vo->vo_levels == NULL) {
943 err = ENODEV;
944 goto out;
945 }
946 preset = (arg2 == POWER_PROFILE_ECONOMY) ?
947 &vo->vo_economy : &vo->vo_fullpower;
948 level = *preset;
949 err = sysctl_handle_int(oidp, &level, 0, req);
950 if (err != 0 || req->newptr == NULL)
951 goto out;
952 if (level < -1 || level > 100) {
953 err = EINVAL;
954 goto out;
955 }
956 if (level == -1) {
957 i = (arg2 == POWER_PROFILE_ECONOMY) ?
958 BCL_ECONOMY : BCL_FULLPOWER;
959 level = vo->vo_levels[i];
960 } else if ((err = acpi_video_vo_check_level(vo, level)) != 0)
961 goto out;
962
963 if (vo->vo_brightness == -1 && (power_profile_get_state() == arg2))
964 vo_set_brightness(vo, level);
965 *preset = level;
966
967 out:
968 ACPI_SERIAL_END(video_output);
969 return (err);
970 }
971
972 /* ARGSUSED */
973 static int
acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS)974 acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS)
975 {
976 struct acpi_video_output *vo;
977 int err;
978
979 vo = (struct acpi_video_output *)arg1;
980 ACPI_SERIAL_BEGIN(video_output);
981 if (vo->vo_levels == NULL) {
982 err = ENODEV;
983 goto out;
984 }
985 if (req->newptr != NULL) {
986 err = EPERM;
987 goto out;
988 }
989 err = sysctl_handle_opaque(oidp, vo->vo_levels,
990 vo->vo_numlevels * sizeof(*vo->vo_levels), req);
991
992 out:
993 ACPI_SERIAL_END(video_output);
994 return (err);
995 }
996
997 static void
vid_set_switch_policy(ACPI_HANDLE handle,UINT32 policy)998 vid_set_switch_policy(ACPI_HANDLE handle, UINT32 policy)
999 {
1000 ACPI_STATUS status;
1001
1002 status = acpi_SetInteger(handle, "_DOS", policy);
1003 if (ACPI_FAILURE(status))
1004 printf("can't evaluate %s._DOS - %s\n",
1005 acpi_name(handle), AcpiFormatException(status));
1006 }
1007
1008 struct enum_callback_arg {
1009 void (*callback)(ACPI_HANDLE, UINT32, void *);
1010 void *context;
1011 ACPI_OBJECT *dod_pkg;
1012 int count;
1013 };
1014
1015 static ACPI_STATUS
vid_enum_outputs_subr(ACPI_HANDLE handle,UINT32 level __unused,void * context,void ** retp __unused)1016 vid_enum_outputs_subr(ACPI_HANDLE handle, UINT32 level __unused,
1017 void *context, void **retp __unused)
1018 {
1019 ACPI_STATUS status;
1020 UINT32 adr, val;
1021 struct enum_callback_arg *argset;
1022 size_t i;
1023
1024 ACPI_SERIAL_ASSERT(video);
1025 argset = context;
1026 status = acpi_GetInteger(handle, "_ADR", &adr);
1027 if (ACPI_FAILURE(status))
1028 return (AE_OK);
1029
1030 for (i = 0; i < argset->dod_pkg->Package.Count; i++) {
1031 if (acpi_PkgInt32(argset->dod_pkg, i, &val) == 0 &&
1032 (val & DOD_DEVID_MASK_FULL) ==
1033 (adr & DOD_DEVID_MASK_FULL)) {
1034 argset->callback(handle, val, argset->context);
1035 argset->count++;
1036 }
1037 }
1038
1039 return (AE_OK);
1040 }
1041
1042 static int
vid_enum_outputs(ACPI_HANDLE handle,void (* callback)(ACPI_HANDLE,UINT32,void *),void * context)1043 vid_enum_outputs(ACPI_HANDLE handle,
1044 void (*callback)(ACPI_HANDLE, UINT32, void *), void *context)
1045 {
1046 ACPI_STATUS status;
1047 ACPI_BUFFER dod_buf;
1048 ACPI_OBJECT *res;
1049 struct enum_callback_arg argset;
1050
1051 ACPI_SERIAL_ASSERT(video);
1052 dod_buf.Length = ACPI_ALLOCATE_BUFFER;
1053 dod_buf.Pointer = NULL;
1054 status = AcpiEvaluateObject(handle, "_DOD", NULL, &dod_buf);
1055 if (ACPI_FAILURE(status)) {
1056 if (status != AE_NOT_FOUND)
1057 printf("can't evaluate %s._DOD - %s\n",
1058 acpi_name(handle), AcpiFormatException(status));
1059 argset.count = -1;
1060 goto out;
1061 }
1062 res = (ACPI_OBJECT *)dod_buf.Pointer;
1063 if (!ACPI_PKG_VALID(res, 1)) {
1064 printf("evaluation of %s._DOD makes no sense\n",
1065 acpi_name(handle));
1066 argset.count = -1;
1067 goto out;
1068 }
1069 if (callback == NULL) {
1070 argset.count = res->Package.Count;
1071 goto out;
1072 }
1073 argset.callback = callback;
1074 argset.context = context;
1075 argset.dod_pkg = res;
1076 argset.count = 0;
1077 status = AcpiWalkNamespace(ACPI_TYPE_DEVICE, handle, 1,
1078 vid_enum_outputs_subr, NULL, &argset, NULL);
1079 if (ACPI_FAILURE(status))
1080 printf("failed walking down %s - %s\n",
1081 acpi_name(handle), AcpiFormatException(status));
1082 out:
1083 if (dod_buf.Pointer != NULL)
1084 AcpiOsFree(dod_buf.Pointer);
1085 return (argset.count);
1086 }
1087
1088 static int
vo_get_brightness_levels(ACPI_HANDLE handle,int ** levelp)1089 vo_get_brightness_levels(ACPI_HANDLE handle, int **levelp)
1090 {
1091 ACPI_STATUS status;
1092 ACPI_BUFFER bcl_buf;
1093 ACPI_OBJECT *res;
1094 int num, i, n, *levels;
1095
1096 bcl_buf.Length = ACPI_ALLOCATE_BUFFER;
1097 bcl_buf.Pointer = NULL;
1098 status = AcpiEvaluateObject(handle, "_BCL", NULL, &bcl_buf);
1099 if (ACPI_FAILURE(status)) {
1100 if (status != AE_NOT_FOUND)
1101 printf("can't evaluate %s._BCL - %s\n",
1102 acpi_name(handle), AcpiFormatException(status));
1103 goto out;
1104 }
1105 res = (ACPI_OBJECT *)bcl_buf.Pointer;
1106 if (!ACPI_PKG_VALID(res, 2)) {
1107 printf("evaluation of %s._BCL makes no sense\n",
1108 acpi_name(handle));
1109 goto out;
1110 }
1111 num = res->Package.Count;
1112 if (num < 2 || levelp == NULL)
1113 goto out;
1114 levels = AcpiOsAllocate(num * sizeof(*levels));
1115 if (levels == NULL)
1116 goto out;
1117 for (i = 0, n = 0; i < num; i++)
1118 if (acpi_PkgInt32(res, i, &levels[n]) == 0)
1119 n++;
1120 if (n < 2) {
1121 AcpiOsFree(levels);
1122 goto out;
1123 }
1124 *levelp = levels;
1125 return (n);
1126
1127 out:
1128 if (bcl_buf.Pointer != NULL)
1129 AcpiOsFree(bcl_buf.Pointer);
1130 return (0);
1131 }
1132
1133 static int
vo_get_bqc(struct acpi_video_output * vo,UINT32 * level)1134 vo_get_bqc(struct acpi_video_output *vo, UINT32 *level)
1135 {
1136 ACPI_STATUS status;
1137
1138 switch (vo->vo_hasbqc) {
1139 case 1:
1140 case -1:
1141 status = acpi_GetInteger(vo->handle, "_BQC", level);
1142 if (vo->vo_hasbqc == 1)
1143 break;
1144 vo->vo_hasbqc = status != AE_NOT_FOUND;
1145 if (vo->vo_hasbqc == 1)
1146 break;
1147 /* FALLTHROUGH */
1148 default:
1149 KASSERT(vo->vo_hasbqc == 0,
1150 ("bad vo_hasbqc state %d", vo->vo_hasbqc));
1151 *level = vo->vo_level;
1152 status = AE_OK;
1153 }
1154 return (status);
1155 }
1156
1157 static int
vo_get_brightness(struct acpi_video_output * vo)1158 vo_get_brightness(struct acpi_video_output *vo)
1159 {
1160 UINT32 level;
1161 ACPI_STATUS status;
1162
1163 ACPI_SERIAL_ASSERT(video_output);
1164 status = vo_get_bqc(vo, &level);
1165 if (ACPI_FAILURE(status)) {
1166 printf("can't evaluate %s._BQC - %s\n", acpi_name(vo->handle),
1167 AcpiFormatException(status));
1168 return (-1);
1169 }
1170 if (level > 100)
1171 return (-1);
1172
1173 return (level);
1174 }
1175
1176 static void
vo_set_brightness(struct acpi_video_output * vo,int level)1177 vo_set_brightness(struct acpi_video_output *vo, int level)
1178 {
1179 char notify_buf[16];
1180 ACPI_STATUS status;
1181
1182 ACPI_SERIAL_ASSERT(video_output);
1183 status = acpi_SetInteger(vo->handle, "_BCM", level);
1184 if (ACPI_FAILURE(status)) {
1185 printf("can't evaluate %s._BCM - %s\n",
1186 acpi_name(vo->handle), AcpiFormatException(status));
1187 } else {
1188 vo->vo_level = level;
1189 }
1190 snprintf(notify_buf, sizeof(notify_buf), "notify=%d", level);
1191 devctl_notify("ACPI", "Video", "brightness", notify_buf);
1192 }
1193
1194 static UINT32
vo_get_device_status(ACPI_HANDLE handle)1195 vo_get_device_status(ACPI_HANDLE handle)
1196 {
1197 UINT32 dcs;
1198 ACPI_STATUS status;
1199
1200 ACPI_SERIAL_ASSERT(video_output);
1201 dcs = 0;
1202 status = acpi_GetInteger(handle, "_DCS", &dcs);
1203 if (ACPI_FAILURE(status)) {
1204 /*
1205 * If the method is missing, assume that the device is always
1206 * operational.
1207 */
1208 if (status != AE_NOT_FOUND) {
1209 printf("can't evaluate %s._DCS - %s\n",
1210 acpi_name(handle), AcpiFormatException(status));
1211 } else {
1212 dcs = 0xff;
1213 }
1214 }
1215
1216 return (dcs);
1217 }
1218
1219 static UINT32
vo_get_graphics_state(ACPI_HANDLE handle)1220 vo_get_graphics_state(ACPI_HANDLE handle)
1221 {
1222 UINT32 dgs;
1223 ACPI_STATUS status;
1224
1225 dgs = 0;
1226 status = acpi_GetInteger(handle, "_DGS", &dgs);
1227 if (ACPI_FAILURE(status)) {
1228 /*
1229 * If the method is missing, assume that the device is always
1230 * operational.
1231 */
1232 if (status != AE_NOT_FOUND) {
1233 printf("can't evaluate %s._DGS - %s\n",
1234 acpi_name(handle), AcpiFormatException(status));
1235 } else {
1236 dgs = 0xff;
1237 }
1238 }
1239
1240 return (dgs);
1241 }
1242
1243 static void
vo_set_device_state(ACPI_HANDLE handle,UINT32 state)1244 vo_set_device_state(ACPI_HANDLE handle, UINT32 state)
1245 {
1246 ACPI_STATUS status;
1247
1248 ACPI_SERIAL_ASSERT(video_output);
1249 status = acpi_SetInteger(handle, "_DSS", state);
1250 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
1251 printf("can't evaluate %s._DSS - %s\n",
1252 acpi_name(handle), AcpiFormatException(status));
1253 }
1254