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