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Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight
[mirror_ubuntu-bionic-kernel.git] / drivers / acpi / video.c
1 /*
2 * video.c - ACPI Video Driver ($Revision:$)
3 *
4 * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
5 * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
6 * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net>
7 *
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 *
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/list.h>
32 #include <linux/proc_fs.h>
33 #include <linux/seq_file.h>
34
35 #include <linux/backlight.h>
36 #include <asm/uaccess.h>
37
38 #include <acpi/acpi_bus.h>
39 #include <acpi/acpi_drivers.h>
40
41 #define ACPI_VIDEO_COMPONENT 0x08000000
42 #define ACPI_VIDEO_CLASS "video"
43 #define ACPI_VIDEO_BUS_NAME "Video Bus"
44 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
45 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
46 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
47 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
48 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
49 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
50
51 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
52 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
53 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
54 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
55 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
56
57 #define ACPI_VIDEO_HEAD_INVALID (~0u - 1)
58 #define ACPI_VIDEO_HEAD_END (~0u)
59 #define MAX_NAME_LEN 20
60
61 #define ACPI_VIDEO_DISPLAY_CRT 1
62 #define ACPI_VIDEO_DISPLAY_TV 2
63 #define ACPI_VIDEO_DISPLAY_DVI 3
64 #define ACPI_VIDEO_DISPLAY_LCD 4
65
66 #define _COMPONENT ACPI_VIDEO_COMPONENT
67 ACPI_MODULE_NAME("video");
68
69 MODULE_AUTHOR("Bruno Ducrot");
70 MODULE_DESCRIPTION("ACPI Video Driver");
71 MODULE_LICENSE("GPL");
72
73 static int acpi_video_bus_add(struct acpi_device *device);
74 static int acpi_video_bus_remove(struct acpi_device *device, int type);
75
76 static struct acpi_driver acpi_video_bus = {
77 .name = "video",
78 .class = ACPI_VIDEO_CLASS,
79 .ids = ACPI_VIDEO_HID,
80 .ops = {
81 .add = acpi_video_bus_add,
82 .remove = acpi_video_bus_remove,
83 },
84 };
85
86 struct acpi_video_bus_flags {
87 u8 multihead:1; /* can switch video heads */
88 u8 rom:1; /* can retrieve a video rom */
89 u8 post:1; /* can configure the head to */
90 u8 reserved:5;
91 };
92
93 struct acpi_video_bus_cap {
94 u8 _DOS:1; /*Enable/Disable output switching */
95 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
96 u8 _ROM:1; /*Get ROM Data */
97 u8 _GPD:1; /*Get POST Device */
98 u8 _SPD:1; /*Set POST Device */
99 u8 _VPO:1; /*Video POST Options */
100 u8 reserved:2;
101 };
102
103 struct acpi_video_device_attrib {
104 u32 display_index:4; /* A zero-based instance of the Display */
105 u32 display_port_attachment:4; /*This field differenates displays type */
106 u32 display_type:4; /*Describe the specific type in use */
107 u32 vendor_specific:4; /*Chipset Vendor Specifi */
108 u32 bios_can_detect:1; /*BIOS can detect the device */
109 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
110 the VGA device. */
111 u32 pipe_id:3; /*For VGA multiple-head devices. */
112 u32 reserved:10; /*Must be 0 */
113 u32 device_id_scheme:1; /*Device ID Scheme */
114 };
115
116 struct acpi_video_enumerated_device {
117 union {
118 u32 int_val;
119 struct acpi_video_device_attrib attrib;
120 } value;
121 struct acpi_video_device *bind_info;
122 };
123
124 struct acpi_video_bus {
125 struct acpi_device *device;
126 u8 dos_setting;
127 struct acpi_video_enumerated_device *attached_array;
128 u8 attached_count;
129 struct acpi_video_bus_cap cap;
130 struct acpi_video_bus_flags flags;
131 struct semaphore sem;
132 struct list_head video_device_list;
133 struct proc_dir_entry *dir;
134 };
135
136 struct acpi_video_device_flags {
137 u8 crt:1;
138 u8 lcd:1;
139 u8 tvout:1;
140 u8 dvi:1;
141 u8 bios:1;
142 u8 unknown:1;
143 u8 reserved:2;
144 };
145
146 struct acpi_video_device_cap {
147 u8 _ADR:1; /*Return the unique ID */
148 u8 _BCL:1; /*Query list of brightness control levels supported */
149 u8 _BCM:1; /*Set the brightness level */
150 u8 _BQC:1; /* Get current brightness level */
151 u8 _DDC:1; /*Return the EDID for this device */
152 u8 _DCS:1; /*Return status of output device */
153 u8 _DGS:1; /*Query graphics state */
154 u8 _DSS:1; /*Device state set */
155 };
156
157 struct acpi_video_device_brightness {
158 int curr;
159 int count;
160 int *levels;
161 };
162
163 struct acpi_video_device {
164 unsigned long device_id;
165 struct acpi_video_device_flags flags;
166 struct acpi_video_device_cap cap;
167 struct list_head entry;
168 struct acpi_video_bus *video;
169 struct acpi_device *dev;
170 struct acpi_video_device_brightness *brightness;
171 struct backlight_device *backlight;
172 };
173
174 /* bus */
175 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
176 static struct file_operations acpi_video_bus_info_fops = {
177 .open = acpi_video_bus_info_open_fs,
178 .read = seq_read,
179 .llseek = seq_lseek,
180 .release = single_release,
181 };
182
183 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
184 static struct file_operations acpi_video_bus_ROM_fops = {
185 .open = acpi_video_bus_ROM_open_fs,
186 .read = seq_read,
187 .llseek = seq_lseek,
188 .release = single_release,
189 };
190
191 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
192 struct file *file);
193 static struct file_operations acpi_video_bus_POST_info_fops = {
194 .open = acpi_video_bus_POST_info_open_fs,
195 .read = seq_read,
196 .llseek = seq_lseek,
197 .release = single_release,
198 };
199
200 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
201 static struct file_operations acpi_video_bus_POST_fops = {
202 .open = acpi_video_bus_POST_open_fs,
203 .read = seq_read,
204 .llseek = seq_lseek,
205 .release = single_release,
206 };
207
208 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
209 static struct file_operations acpi_video_bus_DOS_fops = {
210 .open = acpi_video_bus_DOS_open_fs,
211 .read = seq_read,
212 .llseek = seq_lseek,
213 .release = single_release,
214 };
215
216 /* device */
217 static int acpi_video_device_info_open_fs(struct inode *inode,
218 struct file *file);
219 static struct file_operations acpi_video_device_info_fops = {
220 .open = acpi_video_device_info_open_fs,
221 .read = seq_read,
222 .llseek = seq_lseek,
223 .release = single_release,
224 };
225
226 static int acpi_video_device_state_open_fs(struct inode *inode,
227 struct file *file);
228 static struct file_operations acpi_video_device_state_fops = {
229 .open = acpi_video_device_state_open_fs,
230 .read = seq_read,
231 .llseek = seq_lseek,
232 .release = single_release,
233 };
234
235 static int acpi_video_device_brightness_open_fs(struct inode *inode,
236 struct file *file);
237 static struct file_operations acpi_video_device_brightness_fops = {
238 .open = acpi_video_device_brightness_open_fs,
239 .read = seq_read,
240 .llseek = seq_lseek,
241 .release = single_release,
242 };
243
244 static int acpi_video_device_EDID_open_fs(struct inode *inode,
245 struct file *file);
246 static struct file_operations acpi_video_device_EDID_fops = {
247 .open = acpi_video_device_EDID_open_fs,
248 .read = seq_read,
249 .llseek = seq_lseek,
250 .release = single_release,
251 };
252
253 static char device_decode[][30] = {
254 "motherboard VGA device",
255 "PCI VGA device",
256 "AGP VGA device",
257 "UNKNOWN",
258 };
259
260 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
261 static void acpi_video_device_rebind(struct acpi_video_bus *video);
262 static void acpi_video_device_bind(struct acpi_video_bus *video,
263 struct acpi_video_device *device);
264 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
265 static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
266 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
267 int level);
268 static int acpi_video_device_lcd_get_level_current(
269 struct acpi_video_device *device,
270 unsigned long *level);
271 static int acpi_video_get_next_level(struct acpi_video_device *device,
272 u32 level_current, u32 event);
273 static void acpi_video_switch_brightness(struct acpi_video_device *device,
274 int event);
275
276 /*backlight device sysfs support*/
277 static int acpi_video_get_brightness(struct backlight_device *bd)
278 {
279 unsigned long cur_level;
280 struct acpi_video_device *vd =
281 (struct acpi_video_device *)class_get_devdata(&bd->class_dev);
282 acpi_video_device_lcd_get_level_current(vd, &cur_level);
283 return (int) cur_level;
284 }
285
286 static int acpi_video_set_brightness(struct backlight_device *bd)
287 {
288 int request_level = bd->props.brightness;
289 struct acpi_video_device *vd =
290 (struct acpi_video_device *)class_get_devdata(&bd->class_dev);
291 acpi_video_device_lcd_set_level(vd, request_level);
292 return 0;
293 }
294
295 static struct backlight_ops acpi_backlight_ops = {
296 .get_brightness = acpi_video_get_brightness,
297 .update_status = acpi_video_set_brightness,
298 };
299
300 /* --------------------------------------------------------------------------
301 Video Management
302 -------------------------------------------------------------------------- */
303
304 /* device */
305
306 static int
307 acpi_video_device_query(struct acpi_video_device *device, unsigned long *state)
308 {
309 int status;
310
311 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
312
313 return status;
314 }
315
316 static int
317 acpi_video_device_get_state(struct acpi_video_device *device,
318 unsigned long *state)
319 {
320 int status;
321
322 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
323
324 return status;
325 }
326
327 static int
328 acpi_video_device_set_state(struct acpi_video_device *device, int state)
329 {
330 int status;
331 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
332 struct acpi_object_list args = { 1, &arg0 };
333 unsigned long ret;
334
335
336 arg0.integer.value = state;
337 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
338
339 return status;
340 }
341
342 static int
343 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
344 union acpi_object **levels)
345 {
346 int status;
347 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
348 union acpi_object *obj;
349
350
351 *levels = NULL;
352
353 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
354 if (!ACPI_SUCCESS(status))
355 return status;
356 obj = (union acpi_object *)buffer.pointer;
357 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
358 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
359 status = -EFAULT;
360 goto err;
361 }
362
363 *levels = obj;
364
365 return 0;
366
367 err:
368 kfree(buffer.pointer);
369
370 return status;
371 }
372
373 static int
374 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
375 {
376 int status;
377 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
378 struct acpi_object_list args = { 1, &arg0 };
379
380
381 arg0.integer.value = level;
382 status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
383
384 printk(KERN_DEBUG "set_level status: %x\n", status);
385 return status;
386 }
387
388 static int
389 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
390 unsigned long *level)
391 {
392 int status;
393
394 status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
395
396 return status;
397 }
398
399 static int
400 acpi_video_device_EDID(struct acpi_video_device *device,
401 union acpi_object **edid, ssize_t length)
402 {
403 int status;
404 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
405 union acpi_object *obj;
406 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
407 struct acpi_object_list args = { 1, &arg0 };
408
409
410 *edid = NULL;
411
412 if (!device)
413 return -ENODEV;
414 if (length == 128)
415 arg0.integer.value = 1;
416 else if (length == 256)
417 arg0.integer.value = 2;
418 else
419 return -EINVAL;
420
421 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
422 if (ACPI_FAILURE(status))
423 return -ENODEV;
424
425 obj = buffer.pointer;
426
427 if (obj && obj->type == ACPI_TYPE_BUFFER)
428 *edid = obj;
429 else {
430 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
431 status = -EFAULT;
432 kfree(obj);
433 }
434
435 return status;
436 }
437
438 /* bus */
439
440 static int
441 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
442 {
443 int status;
444 unsigned long tmp;
445 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
446 struct acpi_object_list args = { 1, &arg0 };
447
448
449 arg0.integer.value = option;
450
451 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
452 if (ACPI_SUCCESS(status))
453 status = tmp ? (-EINVAL) : (AE_OK);
454
455 return status;
456 }
457
458 static int
459 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long *id)
460 {
461 int status;
462
463 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
464
465 return status;
466 }
467
468 static int
469 acpi_video_bus_POST_options(struct acpi_video_bus *video,
470 unsigned long *options)
471 {
472 int status;
473
474 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
475 *options &= 3;
476
477 return status;
478 }
479
480 /*
481 * Arg:
482 * video : video bus device pointer
483 * bios_flag :
484 * 0. The system BIOS should NOT automatically switch(toggle)
485 * the active display output.
486 * 1. The system BIOS should automatically switch (toggle) the
487 * active display output. No swich event.
488 * 2. The _DGS value should be locked.
489 * 3. The system BIOS should not automatically switch (toggle) the
490 * active display output, but instead generate the display switch
491 * event notify code.
492 * lcd_flag :
493 * 0. The system BIOS should automatically control the brightness level
494 * of the LCD, when the power changes from AC to DC
495 * 1. The system BIOS should NOT automatically control the brightness
496 * level of the LCD, when the power changes from AC to DC.
497 * Return Value:
498 * -1 wrong arg.
499 */
500
501 static int
502 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
503 {
504 acpi_integer status = 0;
505 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
506 struct acpi_object_list args = { 1, &arg0 };
507
508
509 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
510 status = -1;
511 goto Failed;
512 }
513 arg0.integer.value = (lcd_flag << 2) | bios_flag;
514 video->dos_setting = arg0.integer.value;
515 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
516
517 Failed:
518 return status;
519 }
520
521 /*
522 * Arg:
523 * device : video output device (LCD, CRT, ..)
524 *
525 * Return Value:
526 * None
527 *
528 * Find out all required AML method defined under the output
529 * device.
530 */
531
532 static void acpi_video_device_find_cap(struct acpi_video_device *device)
533 {
534 acpi_integer status;
535 acpi_handle h_dummy1;
536 int i;
537 u32 max_level = 0;
538 union acpi_object *obj = NULL;
539 struct acpi_video_device_brightness *br = NULL;
540
541
542 memset(&device->cap, 0, 4);
543
544 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
545 device->cap._ADR = 1;
546 }
547 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
548 device->cap._BCL = 1;
549 }
550 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
551 device->cap._BCM = 1;
552 }
553 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
554 device->cap._BQC = 1;
555 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
556 device->cap._DDC = 1;
557 }
558 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
559 device->cap._DCS = 1;
560 }
561 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
562 device->cap._DGS = 1;
563 }
564 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
565 device->cap._DSS = 1;
566 }
567
568 status = acpi_video_device_lcd_query_levels(device, &obj);
569
570 if (obj && obj->type == ACPI_TYPE_PACKAGE && obj->package.count >= 2) {
571 int count = 0;
572 union acpi_object *o;
573
574 br = kzalloc(sizeof(*br), GFP_KERNEL);
575 if (!br) {
576 printk(KERN_ERR "can't allocate memory\n");
577 } else {
578 br->levels = kmalloc(obj->package.count *
579 sizeof *(br->levels), GFP_KERNEL);
580 if (!br->levels)
581 goto out;
582
583 for (i = 0; i < obj->package.count; i++) {
584 o = (union acpi_object *)&obj->package.
585 elements[i];
586 if (o->type != ACPI_TYPE_INTEGER) {
587 printk(KERN_ERR PREFIX "Invalid data\n");
588 continue;
589 }
590 br->levels[count] = (u32) o->integer.value;
591 if (br->levels[count] > max_level)
592 max_level = br->levels[count];
593 count++;
594 }
595 out:
596 if (count < 2) {
597 kfree(br->levels);
598 kfree(br);
599 } else {
600 br->count = count;
601 device->brightness = br;
602 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
603 "found %d brightness levels\n",
604 count));
605 }
606 }
607 }
608
609 kfree(obj);
610
611 if (device->cap._BCL && device->cap._BCM && device->cap._BQC){
612 unsigned long tmp;
613 static int count = 0;
614 char *name;
615 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
616 if (!name)
617 return;
618
619 sprintf(name, "acpi_video%d", count++);
620 acpi_video_device_lcd_get_level_current(device, &tmp);
621 device->backlight = backlight_device_register(name,
622 NULL, device, &acpi_backlight_ops);
623 device->backlight->props.max_brightness = max_level;
624 device->backlight->props.brightness = (int)tmp;
625 backlight_update_status(device->backlight);
626
627 kfree(name);
628 }
629 return;
630 }
631
632 /*
633 * Arg:
634 * device : video output device (VGA)
635 *
636 * Return Value:
637 * None
638 *
639 * Find out all required AML method defined under the video bus device.
640 */
641
642 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
643 {
644 acpi_handle h_dummy1;
645
646 memset(&video->cap, 0, 4);
647 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
648 video->cap._DOS = 1;
649 }
650 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
651 video->cap._DOD = 1;
652 }
653 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
654 video->cap._ROM = 1;
655 }
656 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
657 video->cap._GPD = 1;
658 }
659 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
660 video->cap._SPD = 1;
661 }
662 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
663 video->cap._VPO = 1;
664 }
665 }
666
667 /*
668 * Check whether the video bus device has required AML method to
669 * support the desired features
670 */
671
672 static int acpi_video_bus_check(struct acpi_video_bus *video)
673 {
674 acpi_status status = -ENOENT;
675
676
677 if (!video)
678 return -EINVAL;
679
680 /* Since there is no HID, CID and so on for VGA driver, we have
681 * to check well known required nodes.
682 */
683
684 /* Does this device able to support video switching ? */
685 if (video->cap._DOS) {
686 video->flags.multihead = 1;
687 status = 0;
688 }
689
690 /* Does this device able to retrieve a retrieve a video ROM ? */
691 if (video->cap._ROM) {
692 video->flags.rom = 1;
693 status = 0;
694 }
695
696 /* Does this device able to configure which video device to POST ? */
697 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
698 video->flags.post = 1;
699 status = 0;
700 }
701
702 return status;
703 }
704
705 /* --------------------------------------------------------------------------
706 FS Interface (/proc)
707 -------------------------------------------------------------------------- */
708
709 static struct proc_dir_entry *acpi_video_dir;
710
711 /* video devices */
712
713 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
714 {
715 struct acpi_video_device *dev = seq->private;
716
717
718 if (!dev)
719 goto end;
720
721 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
722 seq_printf(seq, "type: ");
723 if (dev->flags.crt)
724 seq_printf(seq, "CRT\n");
725 else if (dev->flags.lcd)
726 seq_printf(seq, "LCD\n");
727 else if (dev->flags.tvout)
728 seq_printf(seq, "TVOUT\n");
729 else if (dev->flags.dvi)
730 seq_printf(seq, "DVI\n");
731 else
732 seq_printf(seq, "UNKNOWN\n");
733
734 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
735
736 end:
737 return 0;
738 }
739
740 static int
741 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
742 {
743 return single_open(file, acpi_video_device_info_seq_show,
744 PDE(inode)->data);
745 }
746
747 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
748 {
749 int status;
750 struct acpi_video_device *dev = seq->private;
751 unsigned long state;
752
753
754 if (!dev)
755 goto end;
756
757 status = acpi_video_device_get_state(dev, &state);
758 seq_printf(seq, "state: ");
759 if (ACPI_SUCCESS(status))
760 seq_printf(seq, "0x%02lx\n", state);
761 else
762 seq_printf(seq, "<not supported>\n");
763
764 status = acpi_video_device_query(dev, &state);
765 seq_printf(seq, "query: ");
766 if (ACPI_SUCCESS(status))
767 seq_printf(seq, "0x%02lx\n", state);
768 else
769 seq_printf(seq, "<not supported>\n");
770
771 end:
772 return 0;
773 }
774
775 static int
776 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
777 {
778 return single_open(file, acpi_video_device_state_seq_show,
779 PDE(inode)->data);
780 }
781
782 static ssize_t
783 acpi_video_device_write_state(struct file *file,
784 const char __user * buffer,
785 size_t count, loff_t * data)
786 {
787 int status;
788 struct seq_file *m = file->private_data;
789 struct acpi_video_device *dev = m->private;
790 char str[12] = { 0 };
791 u32 state = 0;
792
793
794 if (!dev || count + 1 > sizeof str)
795 return -EINVAL;
796
797 if (copy_from_user(str, buffer, count))
798 return -EFAULT;
799
800 str[count] = 0;
801 state = simple_strtoul(str, NULL, 0);
802 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
803
804 status = acpi_video_device_set_state(dev, state);
805
806 if (status)
807 return -EFAULT;
808
809 return count;
810 }
811
812 static int
813 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
814 {
815 struct acpi_video_device *dev = seq->private;
816 int i;
817
818
819 if (!dev || !dev->brightness) {
820 seq_printf(seq, "<not supported>\n");
821 return 0;
822 }
823
824 seq_printf(seq, "levels: ");
825 for (i = 0; i < dev->brightness->count; i++)
826 seq_printf(seq, " %d", dev->brightness->levels[i]);
827 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
828
829 return 0;
830 }
831
832 static int
833 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
834 {
835 return single_open(file, acpi_video_device_brightness_seq_show,
836 PDE(inode)->data);
837 }
838
839 static ssize_t
840 acpi_video_device_write_brightness(struct file *file,
841 const char __user * buffer,
842 size_t count, loff_t * data)
843 {
844 struct seq_file *m = file->private_data;
845 struct acpi_video_device *dev = m->private;
846 char str[4] = { 0 };
847 unsigned int level = 0;
848 int i;
849
850
851 if (!dev || !dev->brightness || count + 1 > sizeof str)
852 return -EINVAL;
853
854 if (copy_from_user(str, buffer, count))
855 return -EFAULT;
856
857 str[count] = 0;
858 level = simple_strtoul(str, NULL, 0);
859
860 if (level > 100)
861 return -EFAULT;
862
863 /* validate though the list of available levels */
864 for (i = 0; i < dev->brightness->count; i++)
865 if (level == dev->brightness->levels[i]) {
866 if (ACPI_SUCCESS
867 (acpi_video_device_lcd_set_level(dev, level)))
868 dev->brightness->curr = level;
869 break;
870 }
871
872 return count;
873 }
874
875 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
876 {
877 struct acpi_video_device *dev = seq->private;
878 int status;
879 int i;
880 union acpi_object *edid = NULL;
881
882
883 if (!dev)
884 goto out;
885
886 status = acpi_video_device_EDID(dev, &edid, 128);
887 if (ACPI_FAILURE(status)) {
888 status = acpi_video_device_EDID(dev, &edid, 256);
889 }
890
891 if (ACPI_FAILURE(status)) {
892 goto out;
893 }
894
895 if (edid && edid->type == ACPI_TYPE_BUFFER) {
896 for (i = 0; i < edid->buffer.length; i++)
897 seq_putc(seq, edid->buffer.pointer[i]);
898 }
899
900 out:
901 if (!edid)
902 seq_printf(seq, "<not supported>\n");
903 else
904 kfree(edid);
905
906 return 0;
907 }
908
909 static int
910 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
911 {
912 return single_open(file, acpi_video_device_EDID_seq_show,
913 PDE(inode)->data);
914 }
915
916 static int acpi_video_device_add_fs(struct acpi_device *device)
917 {
918 struct proc_dir_entry *entry = NULL;
919 struct acpi_video_device *vid_dev;
920
921
922 if (!device)
923 return -ENODEV;
924
925 vid_dev = acpi_driver_data(device);
926 if (!vid_dev)
927 return -ENODEV;
928
929 if (!acpi_device_dir(device)) {
930 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
931 vid_dev->video->dir);
932 if (!acpi_device_dir(device))
933 return -ENODEV;
934 acpi_device_dir(device)->owner = THIS_MODULE;
935 }
936
937 /* 'info' [R] */
938 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
939 if (!entry)
940 return -ENODEV;
941 else {
942 entry->proc_fops = &acpi_video_device_info_fops;
943 entry->data = acpi_driver_data(device);
944 entry->owner = THIS_MODULE;
945 }
946
947 /* 'state' [R/W] */
948 entry =
949 create_proc_entry("state", S_IFREG | S_IRUGO | S_IWUSR,
950 acpi_device_dir(device));
951 if (!entry)
952 return -ENODEV;
953 else {
954 acpi_video_device_state_fops.write = acpi_video_device_write_state;
955 entry->proc_fops = &acpi_video_device_state_fops;
956 entry->data = acpi_driver_data(device);
957 entry->owner = THIS_MODULE;
958 }
959
960 /* 'brightness' [R/W] */
961 entry =
962 create_proc_entry("brightness", S_IFREG | S_IRUGO | S_IWUSR,
963 acpi_device_dir(device));
964 if (!entry)
965 return -ENODEV;
966 else {
967 acpi_video_device_brightness_fops.write = acpi_video_device_write_brightness;
968 entry->proc_fops = &acpi_video_device_brightness_fops;
969 entry->data = acpi_driver_data(device);
970 entry->owner = THIS_MODULE;
971 }
972
973 /* 'EDID' [R] */
974 entry = create_proc_entry("EDID", S_IRUGO, acpi_device_dir(device));
975 if (!entry)
976 return -ENODEV;
977 else {
978 entry->proc_fops = &acpi_video_device_EDID_fops;
979 entry->data = acpi_driver_data(device);
980 entry->owner = THIS_MODULE;
981 }
982
983 return 0;
984 }
985
986 static int acpi_video_device_remove_fs(struct acpi_device *device)
987 {
988 struct acpi_video_device *vid_dev;
989
990 vid_dev = acpi_driver_data(device);
991 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
992 return -ENODEV;
993
994 if (acpi_device_dir(device)) {
995 remove_proc_entry("info", acpi_device_dir(device));
996 remove_proc_entry("state", acpi_device_dir(device));
997 remove_proc_entry("brightness", acpi_device_dir(device));
998 remove_proc_entry("EDID", acpi_device_dir(device));
999 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1000 acpi_device_dir(device) = NULL;
1001 }
1002
1003 return 0;
1004 }
1005
1006 /* video bus */
1007 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1008 {
1009 struct acpi_video_bus *video = seq->private;
1010
1011
1012 if (!video)
1013 goto end;
1014
1015 seq_printf(seq, "Switching heads: %s\n",
1016 video->flags.multihead ? "yes" : "no");
1017 seq_printf(seq, "Video ROM: %s\n",
1018 video->flags.rom ? "yes" : "no");
1019 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1020 video->flags.post ? "yes" : "no");
1021
1022 end:
1023 return 0;
1024 }
1025
1026 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1027 {
1028 return single_open(file, acpi_video_bus_info_seq_show,
1029 PDE(inode)->data);
1030 }
1031
1032 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1033 {
1034 struct acpi_video_bus *video = seq->private;
1035
1036
1037 if (!video)
1038 goto end;
1039
1040 printk(KERN_INFO PREFIX "Please implement %s\n", __FUNCTION__);
1041 seq_printf(seq, "<TODO>\n");
1042
1043 end:
1044 return 0;
1045 }
1046
1047 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1048 {
1049 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1050 }
1051
1052 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1053 {
1054 struct acpi_video_bus *video = seq->private;
1055 unsigned long options;
1056 int status;
1057
1058
1059 if (!video)
1060 goto end;
1061
1062 status = acpi_video_bus_POST_options(video, &options);
1063 if (ACPI_SUCCESS(status)) {
1064 if (!(options & 1)) {
1065 printk(KERN_WARNING PREFIX
1066 "The motherboard VGA device is not listed as a possible POST device.\n");
1067 printk(KERN_WARNING PREFIX
1068 "This indicate a BIOS bug. Please contact the manufacturer.\n");
1069 }
1070 printk("%lx\n", options);
1071 seq_printf(seq, "can POST: <intgrated video>");
1072 if (options & 2)
1073 seq_printf(seq, " <PCI video>");
1074 if (options & 4)
1075 seq_printf(seq, " <AGP video>");
1076 seq_putc(seq, '\n');
1077 } else
1078 seq_printf(seq, "<not supported>\n");
1079 end:
1080 return 0;
1081 }
1082
1083 static int
1084 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1085 {
1086 return single_open(file, acpi_video_bus_POST_info_seq_show,
1087 PDE(inode)->data);
1088 }
1089
1090 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1091 {
1092 struct acpi_video_bus *video = seq->private;
1093 int status;
1094 unsigned long id;
1095
1096
1097 if (!video)
1098 goto end;
1099
1100 status = acpi_video_bus_get_POST(video, &id);
1101 if (!ACPI_SUCCESS(status)) {
1102 seq_printf(seq, "<not supported>\n");
1103 goto end;
1104 }
1105 seq_printf(seq, "device posted is <%s>\n", device_decode[id & 3]);
1106
1107 end:
1108 return 0;
1109 }
1110
1111 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1112 {
1113 struct acpi_video_bus *video = seq->private;
1114
1115
1116 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1117
1118 return 0;
1119 }
1120
1121 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1122 {
1123 return single_open(file, acpi_video_bus_POST_seq_show,
1124 PDE(inode)->data);
1125 }
1126
1127 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1128 {
1129 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1130 }
1131
1132 static ssize_t
1133 acpi_video_bus_write_POST(struct file *file,
1134 const char __user * buffer,
1135 size_t count, loff_t * data)
1136 {
1137 int status;
1138 struct seq_file *m = file->private_data;
1139 struct acpi_video_bus *video = m->private;
1140 char str[12] = { 0 };
1141 unsigned long opt, options;
1142
1143
1144 if (!video || count + 1 > sizeof str)
1145 return -EINVAL;
1146
1147 status = acpi_video_bus_POST_options(video, &options);
1148 if (!ACPI_SUCCESS(status))
1149 return -EINVAL;
1150
1151 if (copy_from_user(str, buffer, count))
1152 return -EFAULT;
1153
1154 str[count] = 0;
1155 opt = strtoul(str, NULL, 0);
1156 if (opt > 3)
1157 return -EFAULT;
1158
1159 /* just in case an OEM 'forget' the motherboard... */
1160 options |= 1;
1161
1162 if (options & (1ul << opt)) {
1163 status = acpi_video_bus_set_POST(video, opt);
1164 if (!ACPI_SUCCESS(status))
1165 return -EFAULT;
1166
1167 }
1168
1169 return count;
1170 }
1171
1172 static ssize_t
1173 acpi_video_bus_write_DOS(struct file *file,
1174 const char __user * buffer,
1175 size_t count, loff_t * data)
1176 {
1177 int status;
1178 struct seq_file *m = file->private_data;
1179 struct acpi_video_bus *video = m->private;
1180 char str[12] = { 0 };
1181 unsigned long opt;
1182
1183
1184 if (!video || count + 1 > sizeof str)
1185 return -EINVAL;
1186
1187 if (copy_from_user(str, buffer, count))
1188 return -EFAULT;
1189
1190 str[count] = 0;
1191 opt = strtoul(str, NULL, 0);
1192 if (opt > 7)
1193 return -EFAULT;
1194
1195 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1196
1197 if (!ACPI_SUCCESS(status))
1198 return -EFAULT;
1199
1200 return count;
1201 }
1202
1203 static int acpi_video_bus_add_fs(struct acpi_device *device)
1204 {
1205 struct proc_dir_entry *entry = NULL;
1206 struct acpi_video_bus *video;
1207
1208
1209 video = acpi_driver_data(device);
1210
1211 if (!acpi_device_dir(device)) {
1212 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
1213 acpi_video_dir);
1214 if (!acpi_device_dir(device))
1215 return -ENODEV;
1216 video->dir = acpi_device_dir(device);
1217 acpi_device_dir(device)->owner = THIS_MODULE;
1218 }
1219
1220 /* 'info' [R] */
1221 entry = create_proc_entry("info", S_IRUGO, acpi_device_dir(device));
1222 if (!entry)
1223 return -ENODEV;
1224 else {
1225 entry->proc_fops = &acpi_video_bus_info_fops;
1226 entry->data = acpi_driver_data(device);
1227 entry->owner = THIS_MODULE;
1228 }
1229
1230 /* 'ROM' [R] */
1231 entry = create_proc_entry("ROM", S_IRUGO, acpi_device_dir(device));
1232 if (!entry)
1233 return -ENODEV;
1234 else {
1235 entry->proc_fops = &acpi_video_bus_ROM_fops;
1236 entry->data = acpi_driver_data(device);
1237 entry->owner = THIS_MODULE;
1238 }
1239
1240 /* 'POST_info' [R] */
1241 entry =
1242 create_proc_entry("POST_info", S_IRUGO, acpi_device_dir(device));
1243 if (!entry)
1244 return -ENODEV;
1245 else {
1246 entry->proc_fops = &acpi_video_bus_POST_info_fops;
1247 entry->data = acpi_driver_data(device);
1248 entry->owner = THIS_MODULE;
1249 }
1250
1251 /* 'POST' [R/W] */
1252 entry =
1253 create_proc_entry("POST", S_IFREG | S_IRUGO | S_IRUSR,
1254 acpi_device_dir(device));
1255 if (!entry)
1256 return -ENODEV;
1257 else {
1258 acpi_video_bus_POST_fops.write = acpi_video_bus_write_POST;
1259 entry->proc_fops = &acpi_video_bus_POST_fops;
1260 entry->data = acpi_driver_data(device);
1261 entry->owner = THIS_MODULE;
1262 }
1263
1264 /* 'DOS' [R/W] */
1265 entry =
1266 create_proc_entry("DOS", S_IFREG | S_IRUGO | S_IRUSR,
1267 acpi_device_dir(device));
1268 if (!entry)
1269 return -ENODEV;
1270 else {
1271 acpi_video_bus_DOS_fops.write = acpi_video_bus_write_DOS;
1272 entry->proc_fops = &acpi_video_bus_DOS_fops;
1273 entry->data = acpi_driver_data(device);
1274 entry->owner = THIS_MODULE;
1275 }
1276
1277 return 0;
1278 }
1279
1280 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1281 {
1282 struct acpi_video_bus *video;
1283
1284
1285 video = acpi_driver_data(device);
1286
1287 if (acpi_device_dir(device)) {
1288 remove_proc_entry("info", acpi_device_dir(device));
1289 remove_proc_entry("ROM", acpi_device_dir(device));
1290 remove_proc_entry("POST_info", acpi_device_dir(device));
1291 remove_proc_entry("POST", acpi_device_dir(device));
1292 remove_proc_entry("DOS", acpi_device_dir(device));
1293 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1294 acpi_device_dir(device) = NULL;
1295 }
1296
1297 return 0;
1298 }
1299
1300 /* --------------------------------------------------------------------------
1301 Driver Interface
1302 -------------------------------------------------------------------------- */
1303
1304 /* device interface */
1305 static struct acpi_video_device_attrib*
1306 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1307 {
1308 int count;
1309
1310 for(count = 0; count < video->attached_count; count++)
1311 if((video->attached_array[count].value.int_val & 0xffff) == device_id)
1312 return &(video->attached_array[count].value.attrib);
1313 return NULL;
1314 }
1315
1316 static int
1317 acpi_video_bus_get_one_device(struct acpi_device *device,
1318 struct acpi_video_bus *video)
1319 {
1320 unsigned long device_id;
1321 int status;
1322 struct acpi_video_device *data;
1323 struct acpi_video_device_attrib* attribute;
1324
1325 if (!device || !video)
1326 return -EINVAL;
1327
1328 status =
1329 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1330 if (ACPI_SUCCESS(status)) {
1331
1332 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1333 if (!data)
1334 return -ENOMEM;
1335
1336 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1337 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1338 acpi_driver_data(device) = data;
1339
1340 data->device_id = device_id;
1341 data->video = video;
1342 data->dev = device;
1343
1344 attribute = acpi_video_get_device_attr(video, device_id);
1345
1346 if((attribute != NULL) && attribute->device_id_scheme) {
1347 switch (attribute->display_type) {
1348 case ACPI_VIDEO_DISPLAY_CRT:
1349 data->flags.crt = 1;
1350 break;
1351 case ACPI_VIDEO_DISPLAY_TV:
1352 data->flags.tvout = 1;
1353 break;
1354 case ACPI_VIDEO_DISPLAY_DVI:
1355 data->flags.dvi = 1;
1356 break;
1357 case ACPI_VIDEO_DISPLAY_LCD:
1358 data->flags.lcd = 1;
1359 break;
1360 default:
1361 data->flags.unknown = 1;
1362 break;
1363 }
1364 if(attribute->bios_can_detect)
1365 data->flags.bios = 1;
1366 } else
1367 data->flags.unknown = 1;
1368
1369 acpi_video_device_bind(video, data);
1370 acpi_video_device_find_cap(data);
1371
1372 status = acpi_install_notify_handler(device->handle,
1373 ACPI_DEVICE_NOTIFY,
1374 acpi_video_device_notify,
1375 data);
1376 if (ACPI_FAILURE(status)) {
1377 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1378 "Error installing notify handler\n"));
1379 if(data->brightness)
1380 kfree(data->brightness->levels);
1381 kfree(data->brightness);
1382 kfree(data);
1383 return -ENODEV;
1384 }
1385
1386 down(&video->sem);
1387 list_add_tail(&data->entry, &video->video_device_list);
1388 up(&video->sem);
1389
1390 acpi_video_device_add_fs(device);
1391
1392 return 0;
1393 }
1394
1395 return -ENOENT;
1396 }
1397
1398 /*
1399 * Arg:
1400 * video : video bus device
1401 *
1402 * Return:
1403 * none
1404 *
1405 * Enumerate the video device list of the video bus,
1406 * bind the ids with the corresponding video devices
1407 * under the video bus.
1408 */
1409
1410 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1411 {
1412 struct list_head *node, *next;
1413 list_for_each_safe(node, next, &video->video_device_list) {
1414 struct acpi_video_device *dev =
1415 container_of(node, struct acpi_video_device, entry);
1416 acpi_video_device_bind(video, dev);
1417 }
1418 }
1419
1420 /*
1421 * Arg:
1422 * video : video bus device
1423 * device : video output device under the video
1424 * bus
1425 *
1426 * Return:
1427 * none
1428 *
1429 * Bind the ids with the corresponding video devices
1430 * under the video bus.
1431 */
1432
1433 static void
1434 acpi_video_device_bind(struct acpi_video_bus *video,
1435 struct acpi_video_device *device)
1436 {
1437 int i;
1438
1439 #define IDS_VAL(i) video->attached_array[i].value.int_val
1440 #define IDS_BIND(i) video->attached_array[i].bind_info
1441
1442 for (i = 0; IDS_VAL(i) != ACPI_VIDEO_HEAD_INVALID &&
1443 i < video->attached_count; i++) {
1444 if (device->device_id == (IDS_VAL(i) & 0xffff)) {
1445 IDS_BIND(i) = device;
1446 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1447 }
1448 }
1449 #undef IDS_VAL
1450 #undef IDS_BIND
1451 }
1452
1453 /*
1454 * Arg:
1455 * video : video bus device
1456 *
1457 * Return:
1458 * < 0 : error
1459 *
1460 * Call _DOD to enumerate all devices attached to display adapter
1461 *
1462 */
1463
1464 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1465 {
1466 int status;
1467 int count;
1468 int i;
1469 struct acpi_video_enumerated_device *active_device_list;
1470 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1471 union acpi_object *dod = NULL;
1472 union acpi_object *obj;
1473
1474 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1475 if (!ACPI_SUCCESS(status)) {
1476 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1477 return status;
1478 }
1479
1480 dod = buffer.pointer;
1481 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1482 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1483 status = -EFAULT;
1484 goto out;
1485 }
1486
1487 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1488 dod->package.count));
1489
1490 active_device_list = kmalloc((1 +
1491 dod->package.count) *
1492 sizeof(struct
1493 acpi_video_enumerated_device),
1494 GFP_KERNEL);
1495
1496 if (!active_device_list) {
1497 status = -ENOMEM;
1498 goto out;
1499 }
1500
1501 count = 0;
1502 for (i = 0; i < dod->package.count; i++) {
1503 obj = &dod->package.elements[i];
1504
1505 if (obj->type != ACPI_TYPE_INTEGER) {
1506 printk(KERN_ERR PREFIX "Invalid _DOD data\n");
1507 active_device_list[i].value.int_val =
1508 ACPI_VIDEO_HEAD_INVALID;
1509 }
1510 active_device_list[i].value.int_val = obj->integer.value;
1511 active_device_list[i].bind_info = NULL;
1512 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1513 (int)obj->integer.value));
1514 count++;
1515 }
1516 active_device_list[count].value.int_val = ACPI_VIDEO_HEAD_END;
1517
1518 kfree(video->attached_array);
1519
1520 video->attached_array = active_device_list;
1521 video->attached_count = count;
1522 out:
1523 kfree(buffer.pointer);
1524 return status;
1525 }
1526
1527 /*
1528 * Arg:
1529 * video : video bus device
1530 * event : Nontify Event
1531 *
1532 * Return:
1533 * < 0 : error
1534 *
1535 * 1. Find out the current active output device.
1536 * 2. Identify the next output device to switch
1537 * 3. call _DSS to do actual switch.
1538 */
1539
1540 static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
1541 {
1542 struct list_head *node, *next;
1543 struct acpi_video_device *dev = NULL;
1544 struct acpi_video_device *dev_next = NULL;
1545 struct acpi_video_device *dev_prev = NULL;
1546 unsigned long state;
1547 int status = 0;
1548
1549
1550 list_for_each_safe(node, next, &video->video_device_list) {
1551 dev = container_of(node, struct acpi_video_device, entry);
1552 status = acpi_video_device_get_state(dev, &state);
1553 if (state & 0x2) {
1554 dev_next =
1555 container_of(node->next, struct acpi_video_device,
1556 entry);
1557 dev_prev =
1558 container_of(node->prev, struct acpi_video_device,
1559 entry);
1560 goto out;
1561 }
1562 }
1563 dev_next = container_of(node->next, struct acpi_video_device, entry);
1564 dev_prev = container_of(node->prev, struct acpi_video_device, entry);
1565 out:
1566 switch (event) {
1567 case ACPI_VIDEO_NOTIFY_CYCLE:
1568 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
1569 acpi_video_device_set_state(dev, 0);
1570 acpi_video_device_set_state(dev_next, 0x80000001);
1571 break;
1572 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
1573 acpi_video_device_set_state(dev, 0);
1574 acpi_video_device_set_state(dev_prev, 0x80000001);
1575 default:
1576 break;
1577 }
1578
1579 return status;
1580 }
1581
1582 static int
1583 acpi_video_get_next_level(struct acpi_video_device *device,
1584 u32 level_current, u32 event)
1585 {
1586 int min, max, min_above, max_below, i, l;
1587 max = max_below = 0;
1588 min = min_above = 255;
1589 for (i = 0; i < device->brightness->count; i++) {
1590 l = device->brightness->levels[i];
1591 if (l < min)
1592 min = l;
1593 if (l > max)
1594 max = l;
1595 if (l < min_above && l > level_current)
1596 min_above = l;
1597 if (l > max_below && l < level_current)
1598 max_below = l;
1599 }
1600
1601 switch (event) {
1602 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1603 return (level_current < max) ? min_above : min;
1604 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1605 return (level_current < max) ? min_above : max;
1606 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1607 return (level_current > min) ? max_below : min;
1608 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1609 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1610 return 0;
1611 default:
1612 return level_current;
1613 }
1614 }
1615
1616 static void
1617 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1618 {
1619 unsigned long level_current, level_next;
1620 acpi_video_device_lcd_get_level_current(device, &level_current);
1621 level_next = acpi_video_get_next_level(device, level_current, event);
1622 acpi_video_device_lcd_set_level(device, level_next);
1623 }
1624
1625 static int
1626 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1627 struct acpi_device *device)
1628 {
1629 int status = 0;
1630 struct list_head *node, *next;
1631
1632
1633 acpi_video_device_enumerate(video);
1634
1635 list_for_each_safe(node, next, &device->children) {
1636 struct acpi_device *dev =
1637 list_entry(node, struct acpi_device, node);
1638
1639 if (!dev)
1640 continue;
1641
1642 status = acpi_video_bus_get_one_device(dev, video);
1643 if (ACPI_FAILURE(status)) {
1644 ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
1645 continue;
1646 }
1647
1648 }
1649 return status;
1650 }
1651
1652 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1653 {
1654 acpi_status status;
1655 struct acpi_video_bus *video;
1656
1657
1658 if (!device || !device->video)
1659 return -ENOENT;
1660
1661 video = device->video;
1662
1663 down(&video->sem);
1664 list_del(&device->entry);
1665 up(&video->sem);
1666 acpi_video_device_remove_fs(device->dev);
1667
1668 status = acpi_remove_notify_handler(device->dev->handle,
1669 ACPI_DEVICE_NOTIFY,
1670 acpi_video_device_notify);
1671 backlight_device_unregister(device->backlight);
1672 return 0;
1673 }
1674
1675 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1676 {
1677 int status;
1678 struct list_head *node, *next;
1679
1680
1681 list_for_each_safe(node, next, &video->video_device_list) {
1682 struct acpi_video_device *data =
1683 list_entry(node, struct acpi_video_device, entry);
1684 if (!data)
1685 continue;
1686
1687 status = acpi_video_bus_put_one_device(data);
1688 if (ACPI_FAILURE(status))
1689 printk(KERN_WARNING PREFIX
1690 "hhuuhhuu bug in acpi video driver.\n");
1691
1692 if (data->brightness)
1693 kfree(data->brightness->levels);
1694 kfree(data->brightness);
1695 kfree(data);
1696 }
1697
1698 return 0;
1699 }
1700
1701 /* acpi_video interface */
1702
1703 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
1704 {
1705 return acpi_video_bus_DOS(video, 1, 0);
1706 }
1707
1708 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
1709 {
1710 return acpi_video_bus_DOS(video, 0, 1);
1711 }
1712
1713 static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
1714 {
1715 struct acpi_video_bus *video = data;
1716 struct acpi_device *device = NULL;
1717
1718 printk("video bus notify\n");
1719
1720 if (!video)
1721 return;
1722
1723 device = video->device;
1724
1725 switch (event) {
1726 case ACPI_VIDEO_NOTIFY_SWITCH: /* User request that a switch occur,
1727 * most likely via hotkey. */
1728 acpi_bus_generate_event(device, event, 0);
1729 break;
1730
1731 case ACPI_VIDEO_NOTIFY_PROBE: /* User plug or remove a video
1732 * connector. */
1733 acpi_video_device_enumerate(video);
1734 acpi_video_device_rebind(video);
1735 acpi_video_switch_output(video, event);
1736 acpi_bus_generate_event(device, event, 0);
1737 break;
1738
1739 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
1740 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
1741 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
1742 acpi_video_switch_output(video, event);
1743 acpi_bus_generate_event(device, event, 0);
1744 break;
1745
1746 default:
1747 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1748 "Unsupported event [0x%x]\n", event));
1749 break;
1750 }
1751
1752 return;
1753 }
1754
1755 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
1756 {
1757 struct acpi_video_device *video_device = data;
1758 struct acpi_device *device = NULL;
1759
1760 if (!video_device)
1761 return;
1762
1763 device = video_device->dev;
1764
1765 switch (event) {
1766 case ACPI_VIDEO_NOTIFY_SWITCH: /* change in status (cycle output device) */
1767 case ACPI_VIDEO_NOTIFY_PROBE: /* change in status (output device status) */
1768 acpi_bus_generate_event(device, event, 0);
1769 break;
1770 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
1771 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
1772 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
1773 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
1774 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
1775 acpi_video_switch_brightness(video_device, event);
1776 acpi_bus_generate_event(device, event, 0);
1777 break;
1778 default:
1779 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1780 "Unsupported event [0x%x]\n", event));
1781 break;
1782 }
1783 return;
1784 }
1785
1786 static int acpi_video_bus_add(struct acpi_device *device)
1787 {
1788 int result = 0;
1789 acpi_status status = 0;
1790 struct acpi_video_bus *video = NULL;
1791
1792
1793 if (!device)
1794 return -EINVAL;
1795
1796 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
1797 if (!video)
1798 return -ENOMEM;
1799
1800 video->device = device;
1801 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
1802 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1803 acpi_driver_data(device) = video;
1804
1805 acpi_video_bus_find_cap(video);
1806 result = acpi_video_bus_check(video);
1807 if (result)
1808 goto end;
1809
1810 result = acpi_video_bus_add_fs(device);
1811 if (result)
1812 goto end;
1813
1814 init_MUTEX(&video->sem);
1815 INIT_LIST_HEAD(&video->video_device_list);
1816
1817 acpi_video_bus_get_devices(video, device);
1818 acpi_video_bus_start_devices(video);
1819
1820 status = acpi_install_notify_handler(device->handle,
1821 ACPI_DEVICE_NOTIFY,
1822 acpi_video_bus_notify, video);
1823 if (ACPI_FAILURE(status)) {
1824 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1825 "Error installing notify handler\n"));
1826 acpi_video_bus_stop_devices(video);
1827 acpi_video_bus_put_devices(video);
1828 kfree(video->attached_array);
1829 acpi_video_bus_remove_fs(device);
1830 result = -ENODEV;
1831 goto end;
1832 }
1833
1834 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
1835 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
1836 video->flags.multihead ? "yes" : "no",
1837 video->flags.rom ? "yes" : "no",
1838 video->flags.post ? "yes" : "no");
1839
1840 end:
1841 if (result)
1842 kfree(video);
1843
1844 return result;
1845 }
1846
1847 static int acpi_video_bus_remove(struct acpi_device *device, int type)
1848 {
1849 acpi_status status = 0;
1850 struct acpi_video_bus *video = NULL;
1851
1852
1853 if (!device || !acpi_driver_data(device))
1854 return -EINVAL;
1855
1856 video = acpi_driver_data(device);
1857
1858 acpi_video_bus_stop_devices(video);
1859
1860 status = acpi_remove_notify_handler(video->device->handle,
1861 ACPI_DEVICE_NOTIFY,
1862 acpi_video_bus_notify);
1863
1864 acpi_video_bus_put_devices(video);
1865 acpi_video_bus_remove_fs(device);
1866
1867 kfree(video->attached_array);
1868 kfree(video);
1869
1870 return 0;
1871 }
1872
1873 static int __init acpi_video_init(void)
1874 {
1875 int result = 0;
1876
1877
1878 /*
1879 acpi_dbg_level = 0xFFFFFFFF;
1880 acpi_dbg_layer = 0x08000000;
1881 */
1882
1883 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
1884 if (!acpi_video_dir)
1885 return -ENODEV;
1886 acpi_video_dir->owner = THIS_MODULE;
1887
1888 result = acpi_bus_register_driver(&acpi_video_bus);
1889 if (result < 0) {
1890 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1891 return -ENODEV;
1892 }
1893
1894 return 0;
1895 }
1896
1897 static void __exit acpi_video_exit(void)
1898 {
1899
1900 acpi_bus_unregister_driver(&acpi_video_bus);
1901
1902 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
1903
1904 return;
1905 }
1906
1907 module_init(acpi_video_init);
1908 module_exit(acpi_video_exit);
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