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810cca90ca7f0e390c2ad3a4dee33353848a0d43
[deliverable/linux.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/mutex.h>
33 #include <linux/proc_fs.h>
34 #include <linux/seq_file.h>
35 #include <linux/input.h>
36 #include <linux/backlight.h>
37 #include <linux/thermal.h>
38 #include <linux/video_output.h>
39 #include <linux/sort.h>
40 #include <linux/pci.h>
41 #include <linux/pci_ids.h>
42 #include <asm/uaccess.h>
43
44 #include <acpi/acpi_bus.h>
45 #include <acpi/acpi_drivers.h>
46
47 #define ACPI_VIDEO_CLASS "video"
48 #define ACPI_VIDEO_BUS_NAME "Video Bus"
49 #define ACPI_VIDEO_DEVICE_NAME "Video Device"
50 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
51 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
52 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
53 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
54 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
55
56 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
57 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
58 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
59 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
60 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
61
62 #define MAX_NAME_LEN 20
63
64 #define ACPI_VIDEO_DISPLAY_CRT 1
65 #define ACPI_VIDEO_DISPLAY_TV 2
66 #define ACPI_VIDEO_DISPLAY_DVI 3
67 #define ACPI_VIDEO_DISPLAY_LCD 4
68
69 #define _COMPONENT ACPI_VIDEO_COMPONENT
70 ACPI_MODULE_NAME("video");
71
72 MODULE_AUTHOR("Bruno Ducrot");
73 MODULE_DESCRIPTION("ACPI Video Driver");
74 MODULE_LICENSE("GPL");
75
76 static int brightness_switch_enabled = 1;
77 module_param(brightness_switch_enabled, bool, 0644);
78
79 static int acpi_video_bus_add(struct acpi_device *device);
80 static int acpi_video_bus_remove(struct acpi_device *device, int type);
81 static int acpi_video_resume(struct acpi_device *device);
82 static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
83
84 static const struct acpi_device_id video_device_ids[] = {
85 {ACPI_VIDEO_HID, 0},
86 {"", 0},
87 };
88 MODULE_DEVICE_TABLE(acpi, video_device_ids);
89
90 static struct acpi_driver acpi_video_bus = {
91 .name = "video",
92 .class = ACPI_VIDEO_CLASS,
93 .ids = video_device_ids,
94 .ops = {
95 .add = acpi_video_bus_add,
96 .remove = acpi_video_bus_remove,
97 .resume = acpi_video_resume,
98 .notify = acpi_video_bus_notify,
99 },
100 };
101
102 struct acpi_video_bus_flags {
103 u8 multihead:1; /* can switch video heads */
104 u8 rom:1; /* can retrieve a video rom */
105 u8 post:1; /* can configure the head to */
106 u8 reserved:5;
107 };
108
109 struct acpi_video_bus_cap {
110 u8 _DOS:1; /*Enable/Disable output switching */
111 u8 _DOD:1; /*Enumerate all devices attached to display adapter */
112 u8 _ROM:1; /*Get ROM Data */
113 u8 _GPD:1; /*Get POST Device */
114 u8 _SPD:1; /*Set POST Device */
115 u8 _VPO:1; /*Video POST Options */
116 u8 reserved:2;
117 };
118
119 struct acpi_video_device_attrib {
120 u32 display_index:4; /* A zero-based instance of the Display */
121 u32 display_port_attachment:4; /*This field differentiates the display type */
122 u32 display_type:4; /*Describe the specific type in use */
123 u32 vendor_specific:4; /*Chipset Vendor Specific */
124 u32 bios_can_detect:1; /*BIOS can detect the device */
125 u32 depend_on_vga:1; /*Non-VGA output device whose power is related to
126 the VGA device. */
127 u32 pipe_id:3; /*For VGA multiple-head devices. */
128 u32 reserved:10; /*Must be 0 */
129 u32 device_id_scheme:1; /*Device ID Scheme */
130 };
131
132 struct acpi_video_enumerated_device {
133 union {
134 u32 int_val;
135 struct acpi_video_device_attrib attrib;
136 } value;
137 struct acpi_video_device *bind_info;
138 };
139
140 struct acpi_video_bus {
141 struct acpi_device *device;
142 u8 dos_setting;
143 struct acpi_video_enumerated_device *attached_array;
144 u8 attached_count;
145 struct acpi_video_bus_cap cap;
146 struct acpi_video_bus_flags flags;
147 struct list_head video_device_list;
148 struct mutex device_list_lock; /* protects video_device_list */
149 struct proc_dir_entry *dir;
150 struct input_dev *input;
151 char phys[32]; /* for input device */
152 };
153
154 struct acpi_video_device_flags {
155 u8 crt:1;
156 u8 lcd:1;
157 u8 tvout:1;
158 u8 dvi:1;
159 u8 bios:1;
160 u8 unknown:1;
161 u8 reserved:2;
162 };
163
164 struct acpi_video_device_cap {
165 u8 _ADR:1; /*Return the unique ID */
166 u8 _BCL:1; /*Query list of brightness control levels supported */
167 u8 _BCM:1; /*Set the brightness level */
168 u8 _BQC:1; /* Get current brightness level */
169 u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */
170 u8 _DDC:1; /*Return the EDID for this device */
171 u8 _DCS:1; /*Return status of output device */
172 u8 _DGS:1; /*Query graphics state */
173 u8 _DSS:1; /*Device state set */
174 };
175
176 struct acpi_video_brightness_flags {
177 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
178 u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/
179 u8 _BCL_use_index:1; /* levels in _BCL are index values */
180 u8 _BCM_use_index:1; /* input of _BCM is an index value */
181 u8 _BQC_use_index:1; /* _BQC returns an index value */
182 };
183
184 struct acpi_video_device_brightness {
185 int curr;
186 int count;
187 int *levels;
188 struct acpi_video_brightness_flags flags;
189 };
190
191 struct acpi_video_device {
192 unsigned long device_id;
193 struct acpi_video_device_flags flags;
194 struct acpi_video_device_cap cap;
195 struct list_head entry;
196 struct acpi_video_bus *video;
197 struct acpi_device *dev;
198 struct acpi_video_device_brightness *brightness;
199 struct backlight_device *backlight;
200 struct thermal_cooling_device *cdev;
201 struct output_device *output_dev;
202 };
203
204 /* bus */
205 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
206 static const struct file_operations acpi_video_bus_info_fops = {
207 .owner = THIS_MODULE,
208 .open = acpi_video_bus_info_open_fs,
209 .read = seq_read,
210 .llseek = seq_lseek,
211 .release = single_release,
212 };
213
214 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file);
215 static const struct file_operations acpi_video_bus_ROM_fops = {
216 .owner = THIS_MODULE,
217 .open = acpi_video_bus_ROM_open_fs,
218 .read = seq_read,
219 .llseek = seq_lseek,
220 .release = single_release,
221 };
222
223 static int acpi_video_bus_POST_info_open_fs(struct inode *inode,
224 struct file *file);
225 static const struct file_operations acpi_video_bus_POST_info_fops = {
226 .owner = THIS_MODULE,
227 .open = acpi_video_bus_POST_info_open_fs,
228 .read = seq_read,
229 .llseek = seq_lseek,
230 .release = single_release,
231 };
232
233 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file);
234 static ssize_t acpi_video_bus_write_POST(struct file *file,
235 const char __user *buffer, size_t count, loff_t *data);
236 static const struct file_operations acpi_video_bus_POST_fops = {
237 .owner = THIS_MODULE,
238 .open = acpi_video_bus_POST_open_fs,
239 .read = seq_read,
240 .write = acpi_video_bus_write_POST,
241 .llseek = seq_lseek,
242 .release = single_release,
243 };
244
245 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file);
246 static ssize_t acpi_video_bus_write_DOS(struct file *file,
247 const char __user *buffer, size_t count, loff_t *data);
248 static const struct file_operations acpi_video_bus_DOS_fops = {
249 .owner = THIS_MODULE,
250 .open = acpi_video_bus_DOS_open_fs,
251 .read = seq_read,
252 .write = acpi_video_bus_write_DOS,
253 .llseek = seq_lseek,
254 .release = single_release,
255 };
256
257 /* device */
258 static int acpi_video_device_info_open_fs(struct inode *inode,
259 struct file *file);
260 static const struct file_operations acpi_video_device_info_fops = {
261 .owner = THIS_MODULE,
262 .open = acpi_video_device_info_open_fs,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = single_release,
266 };
267
268 static int acpi_video_device_state_open_fs(struct inode *inode,
269 struct file *file);
270 static ssize_t acpi_video_device_write_state(struct file *file,
271 const char __user *buffer, size_t count, loff_t *data);
272 static const struct file_operations acpi_video_device_state_fops = {
273 .owner = THIS_MODULE,
274 .open = acpi_video_device_state_open_fs,
275 .read = seq_read,
276 .write = acpi_video_device_write_state,
277 .llseek = seq_lseek,
278 .release = single_release,
279 };
280
281 static int acpi_video_device_brightness_open_fs(struct inode *inode,
282 struct file *file);
283 static ssize_t acpi_video_device_write_brightness(struct file *file,
284 const char __user *buffer, size_t count, loff_t *data);
285 static struct file_operations acpi_video_device_brightness_fops = {
286 .owner = THIS_MODULE,
287 .open = acpi_video_device_brightness_open_fs,
288 .read = seq_read,
289 .write = acpi_video_device_write_brightness,
290 .llseek = seq_lseek,
291 .release = single_release,
292 };
293
294 static int acpi_video_device_EDID_open_fs(struct inode *inode,
295 struct file *file);
296 static const struct file_operations acpi_video_device_EDID_fops = {
297 .owner = THIS_MODULE,
298 .open = acpi_video_device_EDID_open_fs,
299 .read = seq_read,
300 .llseek = seq_lseek,
301 .release = single_release,
302 };
303
304 static const char device_decode[][30] = {
305 "motherboard VGA device",
306 "PCI VGA device",
307 "AGP VGA device",
308 "UNKNOWN",
309 };
310
311 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data);
312 static void acpi_video_device_rebind(struct acpi_video_bus *video);
313 static void acpi_video_device_bind(struct acpi_video_bus *video,
314 struct acpi_video_device *device);
315 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
316 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
317 int level);
318 static int acpi_video_device_lcd_get_level_current(
319 struct acpi_video_device *device,
320 unsigned long long *level);
321 static int acpi_video_get_next_level(struct acpi_video_device *device,
322 u32 level_current, u32 event);
323 static int acpi_video_switch_brightness(struct acpi_video_device *device,
324 int event);
325 static int acpi_video_device_get_state(struct acpi_video_device *device,
326 unsigned long long *state);
327 static int acpi_video_output_get(struct output_device *od);
328 static int acpi_video_device_set_state(struct acpi_video_device *device, int state);
329
330 /*backlight device sysfs support*/
331 static int acpi_video_get_brightness(struct backlight_device *bd)
332 {
333 unsigned long long cur_level;
334 int i;
335 struct acpi_video_device *vd =
336 (struct acpi_video_device *)bl_get_data(bd);
337
338 if (acpi_video_device_lcd_get_level_current(vd, &cur_level))
339 return -EINVAL;
340 for (i = 2; i < vd->brightness->count; i++) {
341 if (vd->brightness->levels[i] == cur_level)
342 /* The first two entries are special - see page 575
343 of the ACPI spec 3.0 */
344 return i-2;
345 }
346 return 0;
347 }
348
349 static int acpi_video_set_brightness(struct backlight_device *bd)
350 {
351 int request_level = bd->props.brightness + 2;
352 struct acpi_video_device *vd =
353 (struct acpi_video_device *)bl_get_data(bd);
354
355 return acpi_video_device_lcd_set_level(vd,
356 vd->brightness->levels[request_level]);
357 }
358
359 static struct backlight_ops acpi_backlight_ops = {
360 .get_brightness = acpi_video_get_brightness,
361 .update_status = acpi_video_set_brightness,
362 };
363
364 /*video output device sysfs support*/
365 static int acpi_video_output_get(struct output_device *od)
366 {
367 unsigned long long state;
368 struct acpi_video_device *vd =
369 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
370 acpi_video_device_get_state(vd, &state);
371 return (int)state;
372 }
373
374 static int acpi_video_output_set(struct output_device *od)
375 {
376 unsigned long state = od->request_state;
377 struct acpi_video_device *vd=
378 (struct acpi_video_device *)dev_get_drvdata(&od->dev);
379 return acpi_video_device_set_state(vd, state);
380 }
381
382 static struct output_properties acpi_output_properties = {
383 .set_state = acpi_video_output_set,
384 .get_status = acpi_video_output_get,
385 };
386
387
388 /* thermal cooling device callbacks */
389 static int video_get_max_state(struct thermal_cooling_device *cdev, unsigned
390 long *state)
391 {
392 struct acpi_device *device = cdev->devdata;
393 struct acpi_video_device *video = acpi_driver_data(device);
394
395 *state = video->brightness->count - 3;
396 return 0;
397 }
398
399 static int video_get_cur_state(struct thermal_cooling_device *cdev, unsigned
400 long *state)
401 {
402 struct acpi_device *device = cdev->devdata;
403 struct acpi_video_device *video = acpi_driver_data(device);
404 unsigned long long level;
405 int offset;
406
407 if (acpi_video_device_lcd_get_level_current(video, &level))
408 return -EINVAL;
409 for (offset = 2; offset < video->brightness->count; offset++)
410 if (level == video->brightness->levels[offset]) {
411 *state = video->brightness->count - offset - 1;
412 return 0;
413 }
414
415 return -EINVAL;
416 }
417
418 static int
419 video_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
420 {
421 struct acpi_device *device = cdev->devdata;
422 struct acpi_video_device *video = acpi_driver_data(device);
423 int level;
424
425 if ( state >= video->brightness->count - 2)
426 return -EINVAL;
427
428 state = video->brightness->count - state;
429 level = video->brightness->levels[state -1];
430 return acpi_video_device_lcd_set_level(video, level);
431 }
432
433 static struct thermal_cooling_device_ops video_cooling_ops = {
434 .get_max_state = video_get_max_state,
435 .get_cur_state = video_get_cur_state,
436 .set_cur_state = video_set_cur_state,
437 };
438
439 /* --------------------------------------------------------------------------
440 Video Management
441 -------------------------------------------------------------------------- */
442
443 /* device */
444
445 static int
446 acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
447 {
448 int status;
449
450 status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
451
452 return status;
453 }
454
455 static int
456 acpi_video_device_get_state(struct acpi_video_device *device,
457 unsigned long long *state)
458 {
459 int status;
460
461 status = acpi_evaluate_integer(device->dev->handle, "_DCS", NULL, state);
462
463 return status;
464 }
465
466 static int
467 acpi_video_device_set_state(struct acpi_video_device *device, int state)
468 {
469 int status;
470 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
471 struct acpi_object_list args = { 1, &arg0 };
472 unsigned long long ret;
473
474
475 arg0.integer.value = state;
476 status = acpi_evaluate_integer(device->dev->handle, "_DSS", &args, &ret);
477
478 return status;
479 }
480
481 static int
482 acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
483 union acpi_object **levels)
484 {
485 int status;
486 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
487 union acpi_object *obj;
488
489
490 *levels = NULL;
491
492 status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer);
493 if (!ACPI_SUCCESS(status))
494 return status;
495 obj = (union acpi_object *)buffer.pointer;
496 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
497 printk(KERN_ERR PREFIX "Invalid _BCL data\n");
498 status = -EFAULT;
499 goto err;
500 }
501
502 *levels = obj;
503
504 return 0;
505
506 err:
507 kfree(buffer.pointer);
508
509 return status;
510 }
511
512 static int
513 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
514 {
515 int status;
516 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
517 struct acpi_object_list args = { 1, &arg0 };
518 int state;
519
520 arg0.integer.value = level;
521
522 status = acpi_evaluate_object(device->dev->handle, "_BCM",
523 &args, NULL);
524 if (ACPI_FAILURE(status)) {
525 ACPI_ERROR((AE_INFO, "Evaluating _BCM failed"));
526 return -EIO;
527 }
528
529 device->brightness->curr = level;
530 for (state = 2; state < device->brightness->count; state++)
531 if (level == device->brightness->levels[state]) {
532 if (device->backlight)
533 device->backlight->props.brightness = state - 2;
534 return 0;
535 }
536
537 ACPI_ERROR((AE_INFO, "Current brightness invalid"));
538 return -EINVAL;
539 }
540
541 /*
542 * For some buggy _BQC methods, we need to add a constant value to
543 * the _BQC return value to get the actual current brightness level
544 */
545
546 static int bqc_offset_aml_bug_workaround;
547 static int __init video_set_bqc_offset(const struct dmi_system_id *d)
548 {
549 bqc_offset_aml_bug_workaround = 9;
550 return 0;
551 }
552
553 static struct dmi_system_id video_dmi_table[] __initdata = {
554 /*
555 * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121
556 */
557 {
558 .callback = video_set_bqc_offset,
559 .ident = "Acer Aspire 5720",
560 .matches = {
561 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
562 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"),
563 },
564 },
565 {
566 .callback = video_set_bqc_offset,
567 .ident = "Acer Aspire 5710Z",
568 .matches = {
569 DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
570 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"),
571 },
572 },
573 {}
574 };
575
576 static int
577 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
578 unsigned long long *level)
579 {
580 acpi_status status = AE_OK;
581
582 if (device->cap._BQC || device->cap._BCQ) {
583 char *buf = device->cap._BQC ? "_BQC" : "_BCQ";
584
585 status = acpi_evaluate_integer(device->dev->handle, buf,
586 NULL, level);
587 if (ACPI_SUCCESS(status)) {
588 if (device->brightness->flags._BQC_use_index) {
589 if (device->brightness->flags._BCL_reversed)
590 *level = device->brightness->count
591 - 3 - (*level);
592 *level = device->brightness->levels[*level + 2];
593
594 }
595 *level += bqc_offset_aml_bug_workaround;
596 device->brightness->curr = *level;
597 return 0;
598 } else {
599 /* Fixme:
600 * should we return an error or ignore this failure?
601 * dev->brightness->curr is a cached value which stores
602 * the correct current backlight level in most cases.
603 * ACPI video backlight still works w/ buggy _BQC.
604 * http://bugzilla.kernel.org/show_bug.cgi?id=12233
605 */
606 ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf));
607 device->cap._BQC = device->cap._BCQ = 0;
608 }
609 }
610
611 *level = device->brightness->curr;
612 return 0;
613 }
614
615 static int
616 acpi_video_device_EDID(struct acpi_video_device *device,
617 union acpi_object **edid, ssize_t length)
618 {
619 int status;
620 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
621 union acpi_object *obj;
622 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
623 struct acpi_object_list args = { 1, &arg0 };
624
625
626 *edid = NULL;
627
628 if (!device)
629 return -ENODEV;
630 if (length == 128)
631 arg0.integer.value = 1;
632 else if (length == 256)
633 arg0.integer.value = 2;
634 else
635 return -EINVAL;
636
637 status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer);
638 if (ACPI_FAILURE(status))
639 return -ENODEV;
640
641 obj = buffer.pointer;
642
643 if (obj && obj->type == ACPI_TYPE_BUFFER)
644 *edid = obj;
645 else {
646 printk(KERN_ERR PREFIX "Invalid _DDC data\n");
647 status = -EFAULT;
648 kfree(obj);
649 }
650
651 return status;
652 }
653
654 /* bus */
655
656 static int
657 acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
658 {
659 int status;
660 unsigned long long tmp;
661 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
662 struct acpi_object_list args = { 1, &arg0 };
663
664
665 arg0.integer.value = option;
666
667 status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
668 if (ACPI_SUCCESS(status))
669 status = tmp ? (-EINVAL) : (AE_OK);
670
671 return status;
672 }
673
674 static int
675 acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
676 {
677 int status;
678
679 status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
680
681 return status;
682 }
683
684 static int
685 acpi_video_bus_POST_options(struct acpi_video_bus *video,
686 unsigned long long *options)
687 {
688 int status;
689
690 status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
691 *options &= 3;
692
693 return status;
694 }
695
696 /*
697 * Arg:
698 * video : video bus device pointer
699 * bios_flag :
700 * 0. The system BIOS should NOT automatically switch(toggle)
701 * the active display output.
702 * 1. The system BIOS should automatically switch (toggle) the
703 * active display output. No switch event.
704 * 2. The _DGS value should be locked.
705 * 3. The system BIOS should not automatically switch (toggle) the
706 * active display output, but instead generate the display switch
707 * event notify code.
708 * lcd_flag :
709 * 0. The system BIOS should automatically control the brightness level
710 * of the LCD when the power changes from AC to DC
711 * 1. The system BIOS should NOT automatically control the brightness
712 * level of the LCD when the power changes from AC to DC.
713 * Return Value:
714 * -1 wrong arg.
715 */
716
717 static int
718 acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag)
719 {
720 acpi_integer status = 0;
721 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
722 struct acpi_object_list args = { 1, &arg0 };
723
724
725 if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) {
726 status = -1;
727 goto Failed;
728 }
729 arg0.integer.value = (lcd_flag << 2) | bios_flag;
730 video->dos_setting = arg0.integer.value;
731 acpi_evaluate_object(video->device->handle, "_DOS", &args, NULL);
732
733 Failed:
734 return status;
735 }
736
737 /*
738 * Simple comparison function used to sort backlight levels.
739 */
740
741 static int
742 acpi_video_cmp_level(const void *a, const void *b)
743 {
744 return *(int *)a - *(int *)b;
745 }
746
747 /*
748 * Arg:
749 * device : video output device (LCD, CRT, ..)
750 *
751 * Return Value:
752 * Maximum brightness level
753 *
754 * Allocate and initialize device->brightness.
755 */
756
757 static int
758 acpi_video_init_brightness(struct acpi_video_device *device)
759 {
760 union acpi_object *obj = NULL;
761 int i, max_level = 0, count = 0, level_ac_battery = 0;
762 unsigned long long level, level_old;
763 union acpi_object *o;
764 struct acpi_video_device_brightness *br = NULL;
765 int result = -EINVAL;
766
767 if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) {
768 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available "
769 "LCD brightness level\n"));
770 goto out;
771 }
772
773 if (obj->package.count < 2)
774 goto out;
775
776 br = kzalloc(sizeof(*br), GFP_KERNEL);
777 if (!br) {
778 printk(KERN_ERR "can't allocate memory\n");
779 result = -ENOMEM;
780 goto out;
781 }
782
783 br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels),
784 GFP_KERNEL);
785 if (!br->levels) {
786 result = -ENOMEM;
787 goto out_free;
788 }
789
790 for (i = 0; i < obj->package.count; i++) {
791 o = (union acpi_object *)&obj->package.elements[i];
792 if (o->type != ACPI_TYPE_INTEGER) {
793 printk(KERN_ERR PREFIX "Invalid data\n");
794 continue;
795 }
796 br->levels[count] = (u32) o->integer.value;
797
798 if (br->levels[count] > max_level)
799 max_level = br->levels[count];
800 count++;
801 }
802
803 /*
804 * some buggy BIOS don't export the levels
805 * when machine is on AC/Battery in _BCL package.
806 * In this case, the first two elements in _BCL packages
807 * are also supported brightness levels that OS should take care of.
808 */
809 for (i = 2; i < count; i++) {
810 if (br->levels[i] == br->levels[0])
811 level_ac_battery++;
812 if (br->levels[i] == br->levels[1])
813 level_ac_battery++;
814 }
815
816 if (level_ac_battery < 2) {
817 level_ac_battery = 2 - level_ac_battery;
818 br->flags._BCL_no_ac_battery_levels = 1;
819 for (i = (count - 1 + level_ac_battery); i >= 2; i--)
820 br->levels[i] = br->levels[i - level_ac_battery];
821 count += level_ac_battery;
822 } else if (level_ac_battery > 2)
823 ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package\n"));
824
825 /* Check if the _BCL package is in a reversed order */
826 if (max_level == br->levels[2]) {
827 br->flags._BCL_reversed = 1;
828 sort(&br->levels[2], count - 2, sizeof(br->levels[2]),
829 acpi_video_cmp_level, NULL);
830 } else if (max_level != br->levels[count - 1])
831 ACPI_ERROR((AE_INFO,
832 "Found unordered _BCL package\n"));
833
834 br->count = count;
835 device->brightness = br;
836
837 /* Check the input/output of _BQC/_BCL/_BCM */
838 if ((max_level < 100) && (max_level <= (count - 2)))
839 br->flags._BCL_use_index = 1;
840
841 /*
842 * _BCM is always consistent with _BCL,
843 * at least for all the laptops we have ever seen.
844 */
845 br->flags._BCM_use_index = br->flags._BCL_use_index;
846
847 /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
848 br->curr = level_old = max_level;
849
850 if (!device->cap._BQC)
851 goto set_level;
852
853 result = acpi_video_device_lcd_get_level_current(device, &level_old);
854 if (result)
855 goto out_free_levels;
856
857 /*
858 * Set the level to maximum and check if _BQC uses indexed value
859 */
860 result = acpi_video_device_lcd_set_level(device, max_level);
861 if (result)
862 goto out_free_levels;
863
864 result = acpi_video_device_lcd_get_level_current(device, &level);
865 if (result)
866 goto out_free_levels;
867
868 br->flags._BQC_use_index = (level == max_level ? 0 : 1);
869
870 if (!br->flags._BQC_use_index)
871 goto set_level;
872
873 if (br->flags._BCL_reversed)
874 level_old = (br->count - 1) - level_old;
875 level_old = br->levels[level_old];
876
877 set_level:
878 result = acpi_video_device_lcd_set_level(device, level_old);
879 if (result)
880 goto out_free_levels;
881
882 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
883 "found %d brightness levels\n", count - 2));
884 kfree(obj);
885 return result;
886
887 out_free_levels:
888 kfree(br->levels);
889 out_free:
890 kfree(br);
891 out:
892 device->brightness = NULL;
893 kfree(obj);
894 return result;
895 }
896
897 /*
898 * Arg:
899 * device : video output device (LCD, CRT, ..)
900 *
901 * Return Value:
902 * None
903 *
904 * Find out all required AML methods defined under the output
905 * device.
906 */
907
908 static void acpi_video_device_find_cap(struct acpi_video_device *device)
909 {
910 acpi_handle h_dummy1;
911
912
913 memset(&device->cap, 0, sizeof(device->cap));
914
915 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) {
916 device->cap._ADR = 1;
917 }
918 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) {
919 device->cap._BCL = 1;
920 }
921 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) {
922 device->cap._BCM = 1;
923 }
924 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1)))
925 device->cap._BQC = 1;
926 else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ",
927 &h_dummy1))) {
928 printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n");
929 device->cap._BCQ = 1;
930 }
931
932 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) {
933 device->cap._DDC = 1;
934 }
935 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DCS", &h_dummy1))) {
936 device->cap._DCS = 1;
937 }
938 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DGS", &h_dummy1))) {
939 device->cap._DGS = 1;
940 }
941 if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DSS", &h_dummy1))) {
942 device->cap._DSS = 1;
943 }
944
945 if (acpi_video_backlight_support()) {
946 int result;
947 static int count = 0;
948 char *name;
949
950 result = acpi_video_init_brightness(device);
951 if (result)
952 return;
953 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
954 if (!name)
955 return;
956
957 sprintf(name, "acpi_video%d", count++);
958 device->backlight = backlight_device_register(name,
959 NULL, device, &acpi_backlight_ops);
960 device->backlight->props.max_brightness = device->brightness->count-3;
961 kfree(name);
962
963 device->cdev = thermal_cooling_device_register("LCD",
964 device->dev, &video_cooling_ops);
965 if (IS_ERR(device->cdev))
966 return;
967
968 dev_info(&device->dev->dev, "registered as cooling_device%d\n",
969 device->cdev->id);
970 result = sysfs_create_link(&device->dev->dev.kobj,
971 &device->cdev->device.kobj,
972 "thermal_cooling");
973 if (result)
974 printk(KERN_ERR PREFIX "Create sysfs link\n");
975 result = sysfs_create_link(&device->cdev->device.kobj,
976 &device->dev->dev.kobj, "device");
977 if (result)
978 printk(KERN_ERR PREFIX "Create sysfs link\n");
979
980 }
981
982 if (acpi_video_display_switch_support()) {
983
984 if (device->cap._DCS && device->cap._DSS) {
985 static int count;
986 char *name;
987 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
988 if (!name)
989 return;
990 sprintf(name, "acpi_video%d", count++);
991 device->output_dev = video_output_register(name,
992 NULL, device, &acpi_output_properties);
993 kfree(name);
994 }
995 }
996 }
997
998 /*
999 * Arg:
1000 * device : video output device (VGA)
1001 *
1002 * Return Value:
1003 * None
1004 *
1005 * Find out all required AML methods defined under the video bus device.
1006 */
1007
1008 static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
1009 {
1010 acpi_handle h_dummy1;
1011
1012 memset(&video->cap, 0, sizeof(video->cap));
1013 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) {
1014 video->cap._DOS = 1;
1015 }
1016 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) {
1017 video->cap._DOD = 1;
1018 }
1019 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) {
1020 video->cap._ROM = 1;
1021 }
1022 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) {
1023 video->cap._GPD = 1;
1024 }
1025 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) {
1026 video->cap._SPD = 1;
1027 }
1028 if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) {
1029 video->cap._VPO = 1;
1030 }
1031 }
1032
1033 /*
1034 * Check whether the video bus device has required AML method to
1035 * support the desired features
1036 */
1037
1038 static int acpi_video_bus_check(struct acpi_video_bus *video)
1039 {
1040 acpi_status status = -ENOENT;
1041 struct device *dev;
1042
1043 if (!video)
1044 return -EINVAL;
1045
1046 dev = acpi_get_physical_pci_device(video->device->handle);
1047 if (!dev)
1048 return -ENODEV;
1049 put_device(dev);
1050
1051 /* Since there is no HID, CID and so on for VGA driver, we have
1052 * to check well known required nodes.
1053 */
1054
1055 /* Does this device support video switching? */
1056 if (video->cap._DOS) {
1057 video->flags.multihead = 1;
1058 status = 0;
1059 }
1060
1061 /* Does this device support retrieving a video ROM? */
1062 if (video->cap._ROM) {
1063 video->flags.rom = 1;
1064 status = 0;
1065 }
1066
1067 /* Does this device support configuring which video device to POST? */
1068 if (video->cap._GPD && video->cap._SPD && video->cap._VPO) {
1069 video->flags.post = 1;
1070 status = 0;
1071 }
1072
1073 return status;
1074 }
1075
1076 /* --------------------------------------------------------------------------
1077 FS Interface (/proc)
1078 -------------------------------------------------------------------------- */
1079
1080 static struct proc_dir_entry *acpi_video_dir;
1081
1082 /* video devices */
1083
1084 static int acpi_video_device_info_seq_show(struct seq_file *seq, void *offset)
1085 {
1086 struct acpi_video_device *dev = seq->private;
1087
1088
1089 if (!dev)
1090 goto end;
1091
1092 seq_printf(seq, "device_id: 0x%04x\n", (u32) dev->device_id);
1093 seq_printf(seq, "type: ");
1094 if (dev->flags.crt)
1095 seq_printf(seq, "CRT\n");
1096 else if (dev->flags.lcd)
1097 seq_printf(seq, "LCD\n");
1098 else if (dev->flags.tvout)
1099 seq_printf(seq, "TVOUT\n");
1100 else if (dev->flags.dvi)
1101 seq_printf(seq, "DVI\n");
1102 else
1103 seq_printf(seq, "UNKNOWN\n");
1104
1105 seq_printf(seq, "known by bios: %s\n", dev->flags.bios ? "yes" : "no");
1106
1107 end:
1108 return 0;
1109 }
1110
1111 static int
1112 acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
1113 {
1114 return single_open(file, acpi_video_device_info_seq_show,
1115 PDE(inode)->data);
1116 }
1117
1118 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
1119 {
1120 int status;
1121 struct acpi_video_device *dev = seq->private;
1122 unsigned long long state;
1123
1124
1125 if (!dev)
1126 goto end;
1127
1128 status = acpi_video_device_get_state(dev, &state);
1129 seq_printf(seq, "state: ");
1130 if (ACPI_SUCCESS(status))
1131 seq_printf(seq, "0x%02llx\n", state);
1132 else
1133 seq_printf(seq, "<not supported>\n");
1134
1135 status = acpi_video_device_query(dev, &state);
1136 seq_printf(seq, "query: ");
1137 if (ACPI_SUCCESS(status))
1138 seq_printf(seq, "0x%02llx\n", state);
1139 else
1140 seq_printf(seq, "<not supported>\n");
1141
1142 end:
1143 return 0;
1144 }
1145
1146 static int
1147 acpi_video_device_state_open_fs(struct inode *inode, struct file *file)
1148 {
1149 return single_open(file, acpi_video_device_state_seq_show,
1150 PDE(inode)->data);
1151 }
1152
1153 static ssize_t
1154 acpi_video_device_write_state(struct file *file,
1155 const char __user * buffer,
1156 size_t count, loff_t * data)
1157 {
1158 int status;
1159 struct seq_file *m = file->private_data;
1160 struct acpi_video_device *dev = m->private;
1161 char str[12] = { 0 };
1162 u32 state = 0;
1163
1164
1165 if (!dev || count + 1 > sizeof str)
1166 return -EINVAL;
1167
1168 if (copy_from_user(str, buffer, count))
1169 return -EFAULT;
1170
1171 str[count] = 0;
1172 state = simple_strtoul(str, NULL, 0);
1173 state &= ((1ul << 31) | (1ul << 30) | (1ul << 0));
1174
1175 status = acpi_video_device_set_state(dev, state);
1176
1177 if (status)
1178 return -EFAULT;
1179
1180 return count;
1181 }
1182
1183 static int
1184 acpi_video_device_brightness_seq_show(struct seq_file *seq, void *offset)
1185 {
1186 struct acpi_video_device *dev = seq->private;
1187 int i;
1188
1189
1190 if (!dev || !dev->brightness) {
1191 seq_printf(seq, "<not supported>\n");
1192 return 0;
1193 }
1194
1195 seq_printf(seq, "levels: ");
1196 for (i = 2; i < dev->brightness->count; i++)
1197 seq_printf(seq, " %d", dev->brightness->levels[i]);
1198 seq_printf(seq, "\ncurrent: %d\n", dev->brightness->curr);
1199
1200 return 0;
1201 }
1202
1203 static int
1204 acpi_video_device_brightness_open_fs(struct inode *inode, struct file *file)
1205 {
1206 return single_open(file, acpi_video_device_brightness_seq_show,
1207 PDE(inode)->data);
1208 }
1209
1210 static ssize_t
1211 acpi_video_device_write_brightness(struct file *file,
1212 const char __user * buffer,
1213 size_t count, loff_t * data)
1214 {
1215 struct seq_file *m = file->private_data;
1216 struct acpi_video_device *dev = m->private;
1217 char str[5] = { 0 };
1218 unsigned int level = 0;
1219 int i;
1220
1221
1222 if (!dev || !dev->brightness || count + 1 > sizeof str)
1223 return -EINVAL;
1224
1225 if (copy_from_user(str, buffer, count))
1226 return -EFAULT;
1227
1228 str[count] = 0;
1229 level = simple_strtoul(str, NULL, 0);
1230
1231 if (level > 100)
1232 return -EFAULT;
1233
1234 /* validate through the list of available levels */
1235 for (i = 2; i < dev->brightness->count; i++)
1236 if (level == dev->brightness->levels[i]) {
1237 if (!acpi_video_device_lcd_set_level(dev, level))
1238 return count;
1239 break;
1240 }
1241
1242 return -EINVAL;
1243 }
1244
1245 static int acpi_video_device_EDID_seq_show(struct seq_file *seq, void *offset)
1246 {
1247 struct acpi_video_device *dev = seq->private;
1248 int status;
1249 int i;
1250 union acpi_object *edid = NULL;
1251
1252
1253 if (!dev)
1254 goto out;
1255
1256 status = acpi_video_device_EDID(dev, &edid, 128);
1257 if (ACPI_FAILURE(status)) {
1258 status = acpi_video_device_EDID(dev, &edid, 256);
1259 }
1260
1261 if (ACPI_FAILURE(status)) {
1262 goto out;
1263 }
1264
1265 if (edid && edid->type == ACPI_TYPE_BUFFER) {
1266 for (i = 0; i < edid->buffer.length; i++)
1267 seq_putc(seq, edid->buffer.pointer[i]);
1268 }
1269
1270 out:
1271 if (!edid)
1272 seq_printf(seq, "<not supported>\n");
1273 else
1274 kfree(edid);
1275
1276 return 0;
1277 }
1278
1279 static int
1280 acpi_video_device_EDID_open_fs(struct inode *inode, struct file *file)
1281 {
1282 return single_open(file, acpi_video_device_EDID_seq_show,
1283 PDE(inode)->data);
1284 }
1285
1286 static int acpi_video_device_add_fs(struct acpi_device *device)
1287 {
1288 struct proc_dir_entry *entry, *device_dir;
1289 struct acpi_video_device *vid_dev;
1290
1291 vid_dev = acpi_driver_data(device);
1292 if (!vid_dev)
1293 return -ENODEV;
1294
1295 device_dir = proc_mkdir(acpi_device_bid(device),
1296 vid_dev->video->dir);
1297 if (!device_dir)
1298 return -ENOMEM;
1299
1300 /* 'info' [R] */
1301 entry = proc_create_data("info", S_IRUGO, device_dir,
1302 &acpi_video_device_info_fops, acpi_driver_data(device));
1303 if (!entry)
1304 goto err_remove_dir;
1305
1306 /* 'state' [R/W] */
1307 entry = proc_create_data("state", S_IFREG | S_IRUGO | S_IWUSR,
1308 device_dir,
1309 &acpi_video_device_state_fops,
1310 acpi_driver_data(device));
1311 if (!entry)
1312 goto err_remove_info;
1313
1314 /* 'brightness' [R/W] */
1315 entry = proc_create_data("brightness", S_IFREG | S_IRUGO | S_IWUSR,
1316 device_dir,
1317 &acpi_video_device_brightness_fops,
1318 acpi_driver_data(device));
1319 if (!entry)
1320 goto err_remove_state;
1321
1322 /* 'EDID' [R] */
1323 entry = proc_create_data("EDID", S_IRUGO, device_dir,
1324 &acpi_video_device_EDID_fops,
1325 acpi_driver_data(device));
1326 if (!entry)
1327 goto err_remove_brightness;
1328
1329 acpi_device_dir(device) = device_dir;
1330
1331 return 0;
1332
1333 err_remove_brightness:
1334 remove_proc_entry("brightness", device_dir);
1335 err_remove_state:
1336 remove_proc_entry("state", device_dir);
1337 err_remove_info:
1338 remove_proc_entry("info", device_dir);
1339 err_remove_dir:
1340 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1341 return -ENOMEM;
1342 }
1343
1344 static int acpi_video_device_remove_fs(struct acpi_device *device)
1345 {
1346 struct acpi_video_device *vid_dev;
1347 struct proc_dir_entry *device_dir;
1348
1349 vid_dev = acpi_driver_data(device);
1350 if (!vid_dev || !vid_dev->video || !vid_dev->video->dir)
1351 return -ENODEV;
1352
1353 device_dir = acpi_device_dir(device);
1354 if (device_dir) {
1355 remove_proc_entry("info", device_dir);
1356 remove_proc_entry("state", device_dir);
1357 remove_proc_entry("brightness", device_dir);
1358 remove_proc_entry("EDID", device_dir);
1359 remove_proc_entry(acpi_device_bid(device), vid_dev->video->dir);
1360 acpi_device_dir(device) = NULL;
1361 }
1362
1363 return 0;
1364 }
1365
1366 /* video bus */
1367 static int acpi_video_bus_info_seq_show(struct seq_file *seq, void *offset)
1368 {
1369 struct acpi_video_bus *video = seq->private;
1370
1371
1372 if (!video)
1373 goto end;
1374
1375 seq_printf(seq, "Switching heads: %s\n",
1376 video->flags.multihead ? "yes" : "no");
1377 seq_printf(seq, "Video ROM: %s\n",
1378 video->flags.rom ? "yes" : "no");
1379 seq_printf(seq, "Device to be POSTed on boot: %s\n",
1380 video->flags.post ? "yes" : "no");
1381
1382 end:
1383 return 0;
1384 }
1385
1386 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file)
1387 {
1388 return single_open(file, acpi_video_bus_info_seq_show,
1389 PDE(inode)->data);
1390 }
1391
1392 static int acpi_video_bus_ROM_seq_show(struct seq_file *seq, void *offset)
1393 {
1394 struct acpi_video_bus *video = seq->private;
1395
1396
1397 if (!video)
1398 goto end;
1399
1400 printk(KERN_INFO PREFIX "Please implement %s\n", __func__);
1401 seq_printf(seq, "<TODO>\n");
1402
1403 end:
1404 return 0;
1405 }
1406
1407 static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
1408 {
1409 return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
1410 }
1411
1412 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
1413 {
1414 struct acpi_video_bus *video = seq->private;
1415 unsigned long long options;
1416 int status;
1417
1418
1419 if (!video)
1420 goto end;
1421
1422 status = acpi_video_bus_POST_options(video, &options);
1423 if (ACPI_SUCCESS(status)) {
1424 if (!(options & 1)) {
1425 printk(KERN_WARNING PREFIX
1426 "The motherboard VGA device is not listed as a possible POST device.\n");
1427 printk(KERN_WARNING PREFIX
1428 "This indicates a BIOS bug. Please contact the manufacturer.\n");
1429 }
1430 printk(KERN_WARNING "%llx\n", options);
1431 seq_printf(seq, "can POST: <integrated video>");
1432 if (options & 2)
1433 seq_printf(seq, " <PCI video>");
1434 if (options & 4)
1435 seq_printf(seq, " <AGP video>");
1436 seq_putc(seq, '\n');
1437 } else
1438 seq_printf(seq, "<not supported>\n");
1439 end:
1440 return 0;
1441 }
1442
1443 static int
1444 acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
1445 {
1446 return single_open(file, acpi_video_bus_POST_info_seq_show,
1447 PDE(inode)->data);
1448 }
1449
1450 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
1451 {
1452 struct acpi_video_bus *video = seq->private;
1453 int status;
1454 unsigned long long id;
1455
1456
1457 if (!video)
1458 goto end;
1459
1460 status = acpi_video_bus_get_POST(video, &id);
1461 if (!ACPI_SUCCESS(status)) {
1462 seq_printf(seq, "<not supported>\n");
1463 goto end;
1464 }
1465 seq_printf(seq, "device POSTed is <%s>\n", device_decode[id & 3]);
1466
1467 end:
1468 return 0;
1469 }
1470
1471 static int acpi_video_bus_DOS_seq_show(struct seq_file *seq, void *offset)
1472 {
1473 struct acpi_video_bus *video = seq->private;
1474
1475
1476 seq_printf(seq, "DOS setting: <%d>\n", video->dos_setting);
1477
1478 return 0;
1479 }
1480
1481 static int acpi_video_bus_POST_open_fs(struct inode *inode, struct file *file)
1482 {
1483 return single_open(file, acpi_video_bus_POST_seq_show,
1484 PDE(inode)->data);
1485 }
1486
1487 static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
1488 {
1489 return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
1490 }
1491
1492 static ssize_t
1493 acpi_video_bus_write_POST(struct file *file,
1494 const char __user * buffer,
1495 size_t count, loff_t * data)
1496 {
1497 int status;
1498 struct seq_file *m = file->private_data;
1499 struct acpi_video_bus *video = m->private;
1500 char str[12] = { 0 };
1501 unsigned long long opt, options;
1502
1503
1504 if (!video || count + 1 > sizeof str)
1505 return -EINVAL;
1506
1507 status = acpi_video_bus_POST_options(video, &options);
1508 if (!ACPI_SUCCESS(status))
1509 return -EINVAL;
1510
1511 if (copy_from_user(str, buffer, count))
1512 return -EFAULT;
1513
1514 str[count] = 0;
1515 opt = strtoul(str, NULL, 0);
1516 if (opt > 3)
1517 return -EFAULT;
1518
1519 /* just in case an OEM 'forgot' the motherboard... */
1520 options |= 1;
1521
1522 if (options & (1ul << opt)) {
1523 status = acpi_video_bus_set_POST(video, opt);
1524 if (!ACPI_SUCCESS(status))
1525 return -EFAULT;
1526
1527 }
1528
1529 return count;
1530 }
1531
1532 static ssize_t
1533 acpi_video_bus_write_DOS(struct file *file,
1534 const char __user * buffer,
1535 size_t count, loff_t * data)
1536 {
1537 int status;
1538 struct seq_file *m = file->private_data;
1539 struct acpi_video_bus *video = m->private;
1540 char str[12] = { 0 };
1541 unsigned long opt;
1542
1543
1544 if (!video || count + 1 > sizeof str)
1545 return -EINVAL;
1546
1547 if (copy_from_user(str, buffer, count))
1548 return -EFAULT;
1549
1550 str[count] = 0;
1551 opt = strtoul(str, NULL, 0);
1552 if (opt > 7)
1553 return -EFAULT;
1554
1555 status = acpi_video_bus_DOS(video, opt & 0x3, (opt & 0x4) >> 2);
1556
1557 if (!ACPI_SUCCESS(status))
1558 return -EFAULT;
1559
1560 return count;
1561 }
1562
1563 static int acpi_video_bus_add_fs(struct acpi_device *device)
1564 {
1565 struct acpi_video_bus *video = acpi_driver_data(device);
1566 struct proc_dir_entry *device_dir;
1567 struct proc_dir_entry *entry;
1568
1569 device_dir = proc_mkdir(acpi_device_bid(device), acpi_video_dir);
1570 if (!device_dir)
1571 return -ENOMEM;
1572
1573 /* 'info' [R] */
1574 entry = proc_create_data("info", S_IRUGO, device_dir,
1575 &acpi_video_bus_info_fops,
1576 acpi_driver_data(device));
1577 if (!entry)
1578 goto err_remove_dir;
1579
1580 /* 'ROM' [R] */
1581 entry = proc_create_data("ROM", S_IRUGO, device_dir,
1582 &acpi_video_bus_ROM_fops,
1583 acpi_driver_data(device));
1584 if (!entry)
1585 goto err_remove_info;
1586
1587 /* 'POST_info' [R] */
1588 entry = proc_create_data("POST_info", S_IRUGO, device_dir,
1589 &acpi_video_bus_POST_info_fops,
1590 acpi_driver_data(device));
1591 if (!entry)
1592 goto err_remove_rom;
1593
1594 /* 'POST' [R/W] */
1595 entry = proc_create_data("POST", S_IFREG | S_IRUGO | S_IWUSR,
1596 device_dir,
1597 &acpi_video_bus_POST_fops,
1598 acpi_driver_data(device));
1599 if (!entry)
1600 goto err_remove_post_info;
1601
1602 /* 'DOS' [R/W] */
1603 entry = proc_create_data("DOS", S_IFREG | S_IRUGO | S_IWUSR,
1604 device_dir,
1605 &acpi_video_bus_DOS_fops,
1606 acpi_driver_data(device));
1607 if (!entry)
1608 goto err_remove_post;
1609
1610 video->dir = acpi_device_dir(device) = device_dir;
1611 return 0;
1612
1613 err_remove_post:
1614 remove_proc_entry("POST", device_dir);
1615 err_remove_post_info:
1616 remove_proc_entry("POST_info", device_dir);
1617 err_remove_rom:
1618 remove_proc_entry("ROM", device_dir);
1619 err_remove_info:
1620 remove_proc_entry("info", device_dir);
1621 err_remove_dir:
1622 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1623 return -ENOMEM;
1624 }
1625
1626 static int acpi_video_bus_remove_fs(struct acpi_device *device)
1627 {
1628 struct proc_dir_entry *device_dir = acpi_device_dir(device);
1629
1630 if (device_dir) {
1631 remove_proc_entry("info", device_dir);
1632 remove_proc_entry("ROM", device_dir);
1633 remove_proc_entry("POST_info", device_dir);
1634 remove_proc_entry("POST", device_dir);
1635 remove_proc_entry("DOS", device_dir);
1636 remove_proc_entry(acpi_device_bid(device), acpi_video_dir);
1637 acpi_device_dir(device) = NULL;
1638 }
1639
1640 return 0;
1641 }
1642
1643 /* --------------------------------------------------------------------------
1644 Driver Interface
1645 -------------------------------------------------------------------------- */
1646
1647 /* device interface */
1648 static struct acpi_video_device_attrib*
1649 acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id)
1650 {
1651 struct acpi_video_enumerated_device *ids;
1652 int i;
1653
1654 for (i = 0; i < video->attached_count; i++) {
1655 ids = &video->attached_array[i];
1656 if ((ids->value.int_val & 0xffff) == device_id)
1657 return &ids->value.attrib;
1658 }
1659
1660 return NULL;
1661 }
1662
1663 static int
1664 acpi_video_bus_get_one_device(struct acpi_device *device,
1665 struct acpi_video_bus *video)
1666 {
1667 unsigned long long device_id;
1668 int status;
1669 struct acpi_video_device *data;
1670 struct acpi_video_device_attrib* attribute;
1671
1672 if (!device || !video)
1673 return -EINVAL;
1674
1675 status =
1676 acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
1677 if (ACPI_SUCCESS(status)) {
1678
1679 data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL);
1680 if (!data)
1681 return -ENOMEM;
1682
1683 strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME);
1684 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
1685 device->driver_data = data;
1686
1687 data->device_id = device_id;
1688 data->video = video;
1689 data->dev = device;
1690
1691 attribute = acpi_video_get_device_attr(video, device_id);
1692
1693 if((attribute != NULL) && attribute->device_id_scheme) {
1694 switch (attribute->display_type) {
1695 case ACPI_VIDEO_DISPLAY_CRT:
1696 data->flags.crt = 1;
1697 break;
1698 case ACPI_VIDEO_DISPLAY_TV:
1699 data->flags.tvout = 1;
1700 break;
1701 case ACPI_VIDEO_DISPLAY_DVI:
1702 data->flags.dvi = 1;
1703 break;
1704 case ACPI_VIDEO_DISPLAY_LCD:
1705 data->flags.lcd = 1;
1706 break;
1707 default:
1708 data->flags.unknown = 1;
1709 break;
1710 }
1711 if(attribute->bios_can_detect)
1712 data->flags.bios = 1;
1713 } else
1714 data->flags.unknown = 1;
1715
1716 acpi_video_device_bind(video, data);
1717 acpi_video_device_find_cap(data);
1718
1719 status = acpi_install_notify_handler(device->handle,
1720 ACPI_DEVICE_NOTIFY,
1721 acpi_video_device_notify,
1722 data);
1723 if (ACPI_FAILURE(status)) {
1724 printk(KERN_ERR PREFIX
1725 "Error installing notify handler\n");
1726 if(data->brightness)
1727 kfree(data->brightness->levels);
1728 kfree(data->brightness);
1729 kfree(data);
1730 return -ENODEV;
1731 }
1732
1733 mutex_lock(&video->device_list_lock);
1734 list_add_tail(&data->entry, &video->video_device_list);
1735 mutex_unlock(&video->device_list_lock);
1736
1737 acpi_video_device_add_fs(device);
1738
1739 return 0;
1740 }
1741
1742 return -ENOENT;
1743 }
1744
1745 /*
1746 * Arg:
1747 * video : video bus device
1748 *
1749 * Return:
1750 * none
1751 *
1752 * Enumerate the video device list of the video bus,
1753 * bind the ids with the corresponding video devices
1754 * under the video bus.
1755 */
1756
1757 static void acpi_video_device_rebind(struct acpi_video_bus *video)
1758 {
1759 struct acpi_video_device *dev;
1760
1761 mutex_lock(&video->device_list_lock);
1762
1763 list_for_each_entry(dev, &video->video_device_list, entry)
1764 acpi_video_device_bind(video, dev);
1765
1766 mutex_unlock(&video->device_list_lock);
1767 }
1768
1769 /*
1770 * Arg:
1771 * video : video bus device
1772 * device : video output device under the video
1773 * bus
1774 *
1775 * Return:
1776 * none
1777 *
1778 * Bind the ids with the corresponding video devices
1779 * under the video bus.
1780 */
1781
1782 static void
1783 acpi_video_device_bind(struct acpi_video_bus *video,
1784 struct acpi_video_device *device)
1785 {
1786 struct acpi_video_enumerated_device *ids;
1787 int i;
1788
1789 for (i = 0; i < video->attached_count; i++) {
1790 ids = &video->attached_array[i];
1791 if (device->device_id == (ids->value.int_val & 0xffff)) {
1792 ids->bind_info = device;
1793 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i));
1794 }
1795 }
1796 }
1797
1798 /*
1799 * Arg:
1800 * video : video bus device
1801 *
1802 * Return:
1803 * < 0 : error
1804 *
1805 * Call _DOD to enumerate all devices attached to display adapter
1806 *
1807 */
1808
1809 static int acpi_video_device_enumerate(struct acpi_video_bus *video)
1810 {
1811 int status;
1812 int count;
1813 int i;
1814 struct acpi_video_enumerated_device *active_list;
1815 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1816 union acpi_object *dod = NULL;
1817 union acpi_object *obj;
1818
1819 status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
1820 if (!ACPI_SUCCESS(status)) {
1821 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));
1822 return status;
1823 }
1824
1825 dod = buffer.pointer;
1826 if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) {
1827 ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data"));
1828 status = -EFAULT;
1829 goto out;
1830 }
1831
1832 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n",
1833 dod->package.count));
1834
1835 active_list = kcalloc(1 + dod->package.count,
1836 sizeof(struct acpi_video_enumerated_device),
1837 GFP_KERNEL);
1838 if (!active_list) {
1839 status = -ENOMEM;
1840 goto out;
1841 }
1842
1843 count = 0;
1844 for (i = 0; i < dod->package.count; i++) {
1845 obj = &dod->package.elements[i];
1846
1847 if (obj->type != ACPI_TYPE_INTEGER) {
1848 printk(KERN_ERR PREFIX
1849 "Invalid _DOD data in element %d\n", i);
1850 continue;
1851 }
1852
1853 active_list[count].value.int_val = obj->integer.value;
1854 active_list[count].bind_info = NULL;
1855 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i,
1856 (int)obj->integer.value));
1857 count++;
1858 }
1859
1860 kfree(video->attached_array);
1861
1862 video->attached_array = active_list;
1863 video->attached_count = count;
1864
1865 out:
1866 kfree(buffer.pointer);
1867 return status;
1868 }
1869
1870 static int
1871 acpi_video_get_next_level(struct acpi_video_device *device,
1872 u32 level_current, u32 event)
1873 {
1874 int min, max, min_above, max_below, i, l, delta = 255;
1875 max = max_below = 0;
1876 min = min_above = 255;
1877 /* Find closest level to level_current */
1878 for (i = 2; i < device->brightness->count; i++) {
1879 l = device->brightness->levels[i];
1880 if (abs(l - level_current) < abs(delta)) {
1881 delta = l - level_current;
1882 if (!delta)
1883 break;
1884 }
1885 }
1886 /* Ajust level_current to closest available level */
1887 level_current += delta;
1888 for (i = 2; i < device->brightness->count; i++) {
1889 l = device->brightness->levels[i];
1890 if (l < min)
1891 min = l;
1892 if (l > max)
1893 max = l;
1894 if (l < min_above && l > level_current)
1895 min_above = l;
1896 if (l > max_below && l < level_current)
1897 max_below = l;
1898 }
1899
1900 switch (event) {
1901 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:
1902 return (level_current < max) ? min_above : min;
1903 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:
1904 return (level_current < max) ? min_above : max;
1905 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:
1906 return (level_current > min) ? max_below : min;
1907 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS:
1908 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:
1909 return 0;
1910 default:
1911 return level_current;
1912 }
1913 }
1914
1915 static int
1916 acpi_video_switch_brightness(struct acpi_video_device *device, int event)
1917 {
1918 unsigned long long level_current, level_next;
1919 int result = -EINVAL;
1920
1921 if (!device->brightness)
1922 goto out;
1923
1924 result = acpi_video_device_lcd_get_level_current(device,
1925 &level_current);
1926 if (result)
1927 goto out;
1928
1929 level_next = acpi_video_get_next_level(device, level_current, event);
1930
1931 result = acpi_video_device_lcd_set_level(device, level_next);
1932
1933 out:
1934 if (result)
1935 printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
1936
1937 return result;
1938 }
1939
1940 static int
1941 acpi_video_bus_get_devices(struct acpi_video_bus *video,
1942 struct acpi_device *device)
1943 {
1944 int status = 0;
1945 struct acpi_device *dev;
1946
1947 acpi_video_device_enumerate(video);
1948
1949 list_for_each_entry(dev, &device->children, node) {
1950
1951 status = acpi_video_bus_get_one_device(dev, video);
1952 if (ACPI_FAILURE(status)) {
1953 printk(KERN_WARNING PREFIX
1954 "Cant attach device");
1955 continue;
1956 }
1957 }
1958 return status;
1959 }
1960
1961 static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
1962 {
1963 acpi_status status;
1964 struct acpi_video_bus *video;
1965
1966
1967 if (!device || !device->video)
1968 return -ENOENT;
1969
1970 video = device->video;
1971
1972 acpi_video_device_remove_fs(device->dev);
1973
1974 status = acpi_remove_notify_handler(device->dev->handle,
1975 ACPI_DEVICE_NOTIFY,
1976 acpi_video_device_notify);
1977 backlight_device_unregister(device->backlight);
1978 if (device->cdev) {
1979 sysfs_remove_link(&device->dev->dev.kobj,
1980 "thermal_cooling");
1981 sysfs_remove_link(&device->cdev->device.kobj,
1982 "device");
1983 thermal_cooling_device_unregister(device->cdev);
1984 device->cdev = NULL;
1985 }
1986 video_output_unregister(device->output_dev);
1987
1988 return 0;
1989 }
1990
1991 static int acpi_video_bus_put_devices(struct acpi_video_bus *video)
1992 {
1993 int status;
1994 struct acpi_video_device *dev, *next;
1995
1996 mutex_lock(&video->device_list_lock);
1997
1998 list_for_each_entry_safe(dev, next, &video->video_device_list, entry) {
1999
2000 status = acpi_video_bus_put_one_device(dev);
2001 if (ACPI_FAILURE(status))
2002 printk(KERN_WARNING PREFIX
2003 "hhuuhhuu bug in acpi video driver.\n");
2004
2005 if (dev->brightness) {
2006 kfree(dev->brightness->levels);
2007 kfree(dev->brightness);
2008 }
2009 list_del(&dev->entry);
2010 kfree(dev);
2011 }
2012
2013 mutex_unlock(&video->device_list_lock);
2014
2015 return 0;
2016 }
2017
2018 /* acpi_video interface */
2019
2020 static int acpi_video_bus_start_devices(struct acpi_video_bus *video)
2021 {
2022 return acpi_video_bus_DOS(video, 0, 0);
2023 }
2024
2025 static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
2026 {
2027 return acpi_video_bus_DOS(video, 0, 1);
2028 }
2029
2030 static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
2031 {
2032 struct acpi_video_bus *video = acpi_driver_data(device);
2033 struct input_dev *input;
2034 int keycode;
2035
2036 if (!video)
2037 return;
2038
2039 input = video->input;
2040
2041 switch (event) {
2042 case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch,
2043 * most likely via hotkey. */
2044 acpi_bus_generate_proc_event(device, event, 0);
2045 keycode = KEY_SWITCHVIDEOMODE;
2046 break;
2047
2048 case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video
2049 * connector. */
2050 acpi_video_device_enumerate(video);
2051 acpi_video_device_rebind(video);
2052 acpi_bus_generate_proc_event(device, event, 0);
2053 keycode = KEY_SWITCHVIDEOMODE;
2054 break;
2055
2056 case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */
2057 acpi_bus_generate_proc_event(device, event, 0);
2058 keycode = KEY_SWITCHVIDEOMODE;
2059 break;
2060 case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */
2061 acpi_bus_generate_proc_event(device, event, 0);
2062 keycode = KEY_VIDEO_NEXT;
2063 break;
2064 case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */
2065 acpi_bus_generate_proc_event(device, event, 0);
2066 keycode = KEY_VIDEO_PREV;
2067 break;
2068
2069 default:
2070 keycode = KEY_UNKNOWN;
2071 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2072 "Unsupported event [0x%x]\n", event));
2073 break;
2074 }
2075
2076 acpi_notifier_call_chain(device, event, 0);
2077 input_report_key(input, keycode, 1);
2078 input_sync(input);
2079 input_report_key(input, keycode, 0);
2080 input_sync(input);
2081
2082 return;
2083 }
2084
2085 static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
2086 {
2087 struct acpi_video_device *video_device = data;
2088 struct acpi_device *device = NULL;
2089 struct acpi_video_bus *bus;
2090 struct input_dev *input;
2091 int keycode;
2092
2093 if (!video_device)
2094 return;
2095
2096 device = video_device->dev;
2097 bus = video_device->video;
2098 input = bus->input;
2099
2100 switch (event) {
2101 case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
2102 if (brightness_switch_enabled)
2103 acpi_video_switch_brightness(video_device, event);
2104 acpi_bus_generate_proc_event(device, event, 0);
2105 keycode = KEY_BRIGHTNESS_CYCLE;
2106 break;
2107 case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
2108 if (brightness_switch_enabled)
2109 acpi_video_switch_brightness(video_device, event);
2110 acpi_bus_generate_proc_event(device, event, 0);
2111 keycode = KEY_BRIGHTNESSUP;
2112 break;
2113 case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
2114 if (brightness_switch_enabled)
2115 acpi_video_switch_brightness(video_device, event);
2116 acpi_bus_generate_proc_event(device, event, 0);
2117 keycode = KEY_BRIGHTNESSDOWN;
2118 break;
2119 case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
2120 if (brightness_switch_enabled)
2121 acpi_video_switch_brightness(video_device, event);
2122 acpi_bus_generate_proc_event(device, event, 0);
2123 keycode = KEY_BRIGHTNESS_ZERO;
2124 break;
2125 case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
2126 if (brightness_switch_enabled)
2127 acpi_video_switch_brightness(video_device, event);
2128 acpi_bus_generate_proc_event(device, event, 0);
2129 keycode = KEY_DISPLAY_OFF;
2130 break;
2131 default:
2132 keycode = KEY_UNKNOWN;
2133 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
2134 "Unsupported event [0x%x]\n", event));
2135 break;
2136 }
2137
2138 acpi_notifier_call_chain(device, event, 0);
2139 input_report_key(input, keycode, 1);
2140 input_sync(input);
2141 input_report_key(input, keycode, 0);
2142 input_sync(input);
2143
2144 return;
2145 }
2146
2147 static int instance;
2148 static int acpi_video_resume(struct acpi_device *device)
2149 {
2150 struct acpi_video_bus *video;
2151 struct acpi_video_device *video_device;
2152 int i;
2153
2154 if (!device || !acpi_driver_data(device))
2155 return -EINVAL;
2156
2157 video = acpi_driver_data(device);
2158
2159 for (i = 0; i < video->attached_count; i++) {
2160 video_device = video->attached_array[i].bind_info;
2161 if (video_device && video_device->backlight)
2162 acpi_video_set_brightness(video_device->backlight);
2163 }
2164 return AE_OK;
2165 }
2166
2167 static int acpi_video_bus_add(struct acpi_device *device)
2168 {
2169 struct acpi_video_bus *video;
2170 struct input_dev *input;
2171 int error;
2172
2173 video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL);
2174 if (!video)
2175 return -ENOMEM;
2176
2177 /* a hack to fix the duplicate name "VID" problem on T61 */
2178 if (!strcmp(device->pnp.bus_id, "VID")) {
2179 if (instance)
2180 device->pnp.bus_id[3] = '0' + instance;
2181 instance ++;
2182 }
2183 /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */
2184 if (!strcmp(device->pnp.bus_id, "VGA")) {
2185 if (instance)
2186 device->pnp.bus_id[3] = '0' + instance;
2187 instance++;
2188 }
2189
2190 video->device = device;
2191 strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
2192 strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);
2193 device->driver_data = video;
2194
2195 acpi_video_bus_find_cap(video);
2196 error = acpi_video_bus_check(video);
2197 if (error)
2198 goto err_free_video;
2199
2200 error = acpi_video_bus_add_fs(device);
2201 if (error)
2202 goto err_free_video;
2203
2204 mutex_init(&video->device_list_lock);
2205 INIT_LIST_HEAD(&video->video_device_list);
2206
2207 acpi_video_bus_get_devices(video, device);
2208 acpi_video_bus_start_devices(video);
2209
2210 video->input = input = input_allocate_device();
2211 if (!input) {
2212 error = -ENOMEM;
2213 goto err_stop_video;
2214 }
2215
2216 snprintf(video->phys, sizeof(video->phys),
2217 "%s/video/input0", acpi_device_hid(video->device));
2218
2219 input->name = acpi_device_name(video->device);
2220 input->phys = video->phys;
2221 input->id.bustype = BUS_HOST;
2222 input->id.product = 0x06;
2223 input->dev.parent = &device->dev;
2224 input->evbit[0] = BIT(EV_KEY);
2225 set_bit(KEY_SWITCHVIDEOMODE, input->keybit);
2226 set_bit(KEY_VIDEO_NEXT, input->keybit);
2227 set_bit(KEY_VIDEO_PREV, input->keybit);
2228 set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit);
2229 set_bit(KEY_BRIGHTNESSUP, input->keybit);
2230 set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
2231 set_bit(KEY_BRIGHTNESS_ZERO, input->keybit);
2232 set_bit(KEY_DISPLAY_OFF, input->keybit);
2233 set_bit(KEY_UNKNOWN, input->keybit);
2234
2235 error = input_register_device(input);
2236 if (error)
2237 goto err_free_input_dev;
2238
2239 printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n",
2240 ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device),
2241 video->flags.multihead ? "yes" : "no",
2242 video->flags.rom ? "yes" : "no",
2243 video->flags.post ? "yes" : "no");
2244
2245 return 0;
2246
2247 err_free_input_dev:
2248 input_free_device(input);
2249 err_stop_video:
2250 acpi_video_bus_stop_devices(video);
2251 acpi_video_bus_put_devices(video);
2252 kfree(video->attached_array);
2253 acpi_video_bus_remove_fs(device);
2254 err_free_video:
2255 kfree(video);
2256 device->driver_data = NULL;
2257
2258 return error;
2259 }
2260
2261 static int acpi_video_bus_remove(struct acpi_device *device, int type)
2262 {
2263 struct acpi_video_bus *video = NULL;
2264
2265
2266 if (!device || !acpi_driver_data(device))
2267 return -EINVAL;
2268
2269 video = acpi_driver_data(device);
2270
2271 acpi_video_bus_stop_devices(video);
2272 acpi_video_bus_put_devices(video);
2273 acpi_video_bus_remove_fs(device);
2274
2275 input_unregister_device(video->input);
2276 kfree(video->attached_array);
2277 kfree(video);
2278
2279 return 0;
2280 }
2281
2282 static int __init intel_opregion_present(void)
2283 {
2284 #if defined(CONFIG_DRM_I915) || defined(CONFIG_DRM_I915_MODULE)
2285 struct pci_dev *dev = NULL;
2286 u32 address;
2287
2288 for_each_pci_dev(dev) {
2289 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
2290 continue;
2291 if (dev->vendor != PCI_VENDOR_ID_INTEL)
2292 continue;
2293 pci_read_config_dword(dev, 0xfc, &address);
2294 if (!address)
2295 continue;
2296 return 1;
2297 }
2298 #endif
2299 return 0;
2300 }
2301
2302 int acpi_video_register(void)
2303 {
2304 int result = 0;
2305
2306 acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
2307 if (!acpi_video_dir)
2308 return -ENODEV;
2309
2310 result = acpi_bus_register_driver(&acpi_video_bus);
2311 if (result < 0) {
2312 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2313 return -ENODEV;
2314 }
2315
2316 return 0;
2317 }
2318 EXPORT_SYMBOL(acpi_video_register);
2319
2320 /*
2321 * This is kind of nasty. Hardware using Intel chipsets may require
2322 * the video opregion code to be run first in order to initialise
2323 * state before any ACPI video calls are made. To handle this we defer
2324 * registration of the video class until the opregion code has run.
2325 */
2326
2327 static int __init acpi_video_init(void)
2328 {
2329 dmi_check_system(video_dmi_table);
2330
2331 if (intel_opregion_present())
2332 return 0;
2333
2334 return acpi_video_register();
2335 }
2336
2337 void __exit acpi_video_exit(void)
2338 {
2339
2340 acpi_bus_unregister_driver(&acpi_video_bus);
2341
2342 remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
2343
2344 return;
2345 }
2346 EXPORT_SYMBOL(acpi_video_exit);
2347
2348 module_init(acpi_video_init);
2349 module_exit(acpi_video_exit);
Linux kernel - Deliverables
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