Commit | Line | Data |
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1da177e4 LT |
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> | |
f4715189 | 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
1da177e4 LT |
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> | |
bbac81f5 | 32 | #include <linux/mutex.h> |
e9dab196 | 33 | #include <linux/input.h> |
2f3d000a | 34 | #include <linux/backlight.h> |
702ed512 | 35 | #include <linux/thermal.h> |
935e5f29 | 36 | #include <linux/sort.h> |
74a365b3 MG |
37 | #include <linux/pci.h> |
38 | #include <linux/pci_ids.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 | 40 | #include <asm/uaccess.h> |
eb27cae8 | 41 | #include <linux/dmi.h> |
1da177e4 LT |
42 | #include <acpi/acpi_bus.h> |
43 | #include <acpi/acpi_drivers.h> | |
ac7729da | 44 | #include <linux/suspend.h> |
e92a7162 | 45 | #include <acpi/video.h> |
1da177e4 | 46 | |
a192a958 LB |
47 | #define PREFIX "ACPI: " |
48 | ||
1da177e4 LT |
49 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
50 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
51 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
52 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
53 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
54 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
55 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
56 | ||
f4715189 TT |
57 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
58 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
59 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
60 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
61 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 62 | |
2f3d000a | 63 | #define MAX_NAME_LEN 20 |
1da177e4 | 64 | |
1da177e4 | 65 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 66 | ACPI_MODULE_NAME("video"); |
1da177e4 | 67 | |
f52fd66d | 68 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 69 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
70 | MODULE_LICENSE("GPL"); |
71 | ||
90ab5ee9 | 72 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
73 | module_param(brightness_switch_enabled, bool, 0644); |
74 | ||
c504f8cb ZR |
75 | /* |
76 | * By default, we don't allow duplicate ACPI video bus devices | |
77 | * under the same VGA controller | |
78 | */ | |
90ab5ee9 | 79 | static bool allow_duplicates; |
c504f8cb ZR |
80 | module_param(allow_duplicates, bool, 0644); |
81 | ||
99fd1895 ZR |
82 | /* |
83 | * Some BIOSes claim they use minimum backlight at boot, | |
84 | * and this may bring dimming screen after boot | |
85 | */ | |
90ab5ee9 | 86 | static bool use_bios_initial_backlight = 1; |
99fd1895 ZR |
87 | module_param(use_bios_initial_backlight, bool, 0644); |
88 | ||
86e437f0 | 89 | static int register_count = 0; |
4be44fcd | 90 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 91 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 92 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 93 | |
1ba90e3a TR |
94 | static const struct acpi_device_id video_device_ids[] = { |
95 | {ACPI_VIDEO_HID, 0}, | |
96 | {"", 0}, | |
97 | }; | |
98 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
99 | ||
1da177e4 | 100 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 101 | .name = "video", |
1da177e4 | 102 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 103 | .ids = video_device_ids, |
1da177e4 LT |
104 | .ops = { |
105 | .add = acpi_video_bus_add, | |
106 | .remove = acpi_video_bus_remove, | |
7015558f | 107 | .notify = acpi_video_bus_notify, |
4be44fcd | 108 | }, |
1da177e4 LT |
109 | }; |
110 | ||
111 | struct acpi_video_bus_flags { | |
4be44fcd LB |
112 | u8 multihead:1; /* can switch video heads */ |
113 | u8 rom:1; /* can retrieve a video rom */ | |
114 | u8 post:1; /* can configure the head to */ | |
115 | u8 reserved:5; | |
1da177e4 LT |
116 | }; |
117 | ||
118 | struct acpi_video_bus_cap { | |
4be44fcd LB |
119 | u8 _DOS:1; /*Enable/Disable output switching */ |
120 | u8 _DOD:1; /*Enumerate all devices attached to display adapter */ | |
121 | u8 _ROM:1; /*Get ROM Data */ | |
122 | u8 _GPD:1; /*Get POST Device */ | |
123 | u8 _SPD:1; /*Set POST Device */ | |
124 | u8 _VPO:1; /*Video POST Options */ | |
125 | u8 reserved:2; | |
1da177e4 LT |
126 | }; |
127 | ||
4be44fcd LB |
128 | struct acpi_video_device_attrib { |
129 | u32 display_index:4; /* A zero-based instance of the Display */ | |
98fb8fe1 | 130 | u32 display_port_attachment:4; /*This field differentiates the display type */ |
4be44fcd | 131 | u32 display_type:4; /*Describe the specific type in use */ |
98fb8fe1 | 132 | u32 vendor_specific:4; /*Chipset Vendor Specific */ |
4be44fcd LB |
133 | u32 bios_can_detect:1; /*BIOS can detect the device */ |
134 | u32 depend_on_vga:1; /*Non-VGA output device whose power is related to | |
135 | the VGA device. */ | |
136 | u32 pipe_id:3; /*For VGA multiple-head devices. */ | |
137 | u32 reserved:10; /*Must be 0 */ | |
138 | u32 device_id_scheme:1; /*Device ID Scheme */ | |
1da177e4 LT |
139 | }; |
140 | ||
141 | struct acpi_video_enumerated_device { | |
142 | union { | |
143 | u32 int_val; | |
4be44fcd | 144 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
145 | } value; |
146 | struct acpi_video_device *bind_info; | |
147 | }; | |
148 | ||
149 | struct acpi_video_bus { | |
e6afa0de | 150 | struct acpi_device *device; |
4be44fcd | 151 | u8 dos_setting; |
1da177e4 | 152 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
153 | u8 attached_count; |
154 | struct acpi_video_bus_cap cap; | |
1da177e4 | 155 | struct acpi_video_bus_flags flags; |
4be44fcd | 156 | struct list_head video_device_list; |
bbac81f5 | 157 | struct mutex device_list_lock; /* protects video_device_list */ |
e9dab196 LY |
158 | struct input_dev *input; |
159 | char phys[32]; /* for input device */ | |
ac7729da | 160 | struct notifier_block pm_nb; |
1da177e4 LT |
161 | }; |
162 | ||
163 | struct acpi_video_device_flags { | |
4be44fcd LB |
164 | u8 crt:1; |
165 | u8 lcd:1; | |
166 | u8 tvout:1; | |
82cae999 | 167 | u8 dvi:1; |
4be44fcd LB |
168 | u8 bios:1; |
169 | u8 unknown:1; | |
91e13aa3 AL |
170 | u8 notify:1; |
171 | u8 reserved:1; | |
1da177e4 LT |
172 | }; |
173 | ||
174 | struct acpi_video_device_cap { | |
4be44fcd LB |
175 | u8 _ADR:1; /*Return the unique ID */ |
176 | u8 _BCL:1; /*Query list of brightness control levels supported */ | |
177 | u8 _BCM:1; /*Set the brightness level */ | |
2f3d000a | 178 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 179 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
4be44fcd | 180 | u8 _DDC:1; /*Return the EDID for this device */ |
1da177e4 LT |
181 | }; |
182 | ||
d32f6947 ZR |
183 | struct acpi_video_brightness_flags { |
184 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
d80fb99f | 185 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
1a7c618a ZR |
186 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
187 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
188 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
189 | }; |
190 | ||
1da177e4 | 191 | struct acpi_video_device_brightness { |
4be44fcd LB |
192 | int curr; |
193 | int count; | |
194 | int *levels; | |
d32f6947 | 195 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
196 | }; |
197 | ||
198 | struct acpi_video_device { | |
4be44fcd LB |
199 | unsigned long device_id; |
200 | struct acpi_video_device_flags flags; | |
201 | struct acpi_video_device_cap cap; | |
202 | struct list_head entry; | |
203 | struct acpi_video_bus *video; | |
204 | struct acpi_device *dev; | |
1da177e4 | 205 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 206 | struct backlight_device *backlight; |
4a703a8f | 207 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
208 | }; |
209 | ||
b7171ae7 | 210 | static const char device_decode[][30] = { |
1da177e4 LT |
211 | "motherboard VGA device", |
212 | "PCI VGA device", | |
213 | "AGP VGA device", | |
214 | "UNKNOWN", | |
215 | }; | |
216 | ||
4be44fcd LB |
217 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
218 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
219 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
220 | struct acpi_video_device *device); | |
1da177e4 | 221 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
222 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
223 | int level); | |
224 | static int acpi_video_device_lcd_get_level_current( | |
225 | struct acpi_video_device *device, | |
a89803df | 226 | unsigned long long *level, bool raw); |
4be44fcd LB |
227 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
228 | u32 level_current, u32 event); | |
c8890f90 | 229 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 230 | int event); |
1da177e4 | 231 | |
2f3d000a YL |
232 | /*backlight device sysfs support*/ |
233 | static int acpi_video_get_brightness(struct backlight_device *bd) | |
234 | { | |
27663c58 | 235 | unsigned long long cur_level; |
38531e6f | 236 | int i; |
2f3d000a | 237 | struct acpi_video_device *vd = |
655bfd7a | 238 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 | 239 | |
a89803df | 240 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 241 | return -EINVAL; |
38531e6f MG |
242 | for (i = 2; i < vd->brightness->count; i++) { |
243 | if (vd->brightness->levels[i] == cur_level) | |
244 | /* The first two entries are special - see page 575 | |
245 | of the ACPI spec 3.0 */ | |
246 | return i-2; | |
247 | } | |
248 | return 0; | |
2f3d000a YL |
249 | } |
250 | ||
251 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
252 | { | |
24450c7a | 253 | int request_level = bd->props.brightness + 2; |
2f3d000a | 254 | struct acpi_video_device *vd = |
655bfd7a | 255 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
256 | |
257 | return acpi_video_device_lcd_set_level(vd, | |
258 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
259 | } |
260 | ||
acc2472e | 261 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
262 | .get_brightness = acpi_video_get_brightness, |
263 | .update_status = acpi_video_set_brightness, | |
264 | }; | |
265 | ||
702ed512 | 266 | /* thermal cooling device callbacks */ |
4a703a8f | 267 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 268 | long *state) |
702ed512 | 269 | { |
4a703a8f | 270 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
271 | struct acpi_video_device *video = acpi_driver_data(device); |
272 | ||
6503e5df MG |
273 | *state = video->brightness->count - 3; |
274 | return 0; | |
702ed512 ZR |
275 | } |
276 | ||
4a703a8f | 277 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 278 | long *state) |
702ed512 | 279 | { |
4a703a8f | 280 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 281 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 282 | unsigned long long level; |
6503e5df | 283 | int offset; |
702ed512 | 284 | |
a89803df | 285 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 286 | return -EINVAL; |
6503e5df MG |
287 | for (offset = 2; offset < video->brightness->count; offset++) |
288 | if (level == video->brightness->levels[offset]) { | |
289 | *state = video->brightness->count - offset - 1; | |
290 | return 0; | |
291 | } | |
702ed512 ZR |
292 | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | static int | |
4a703a8f | 297 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 298 | { |
4a703a8f | 299 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
300 | struct acpi_video_device *video = acpi_driver_data(device); |
301 | int level; | |
302 | ||
303 | if ( state >= video->brightness->count - 2) | |
304 | return -EINVAL; | |
305 | ||
306 | state = video->brightness->count - state; | |
307 | level = video->brightness->levels[state -1]; | |
308 | return acpi_video_device_lcd_set_level(video, level); | |
309 | } | |
310 | ||
9c8b04be | 311 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
312 | .get_max_state = video_get_max_state, |
313 | .get_cur_state = video_get_cur_state, | |
314 | .set_cur_state = video_set_cur_state, | |
315 | }; | |
316 | ||
1da177e4 LT |
317 | /* -------------------------------------------------------------------------- |
318 | Video Management | |
319 | -------------------------------------------------------------------------- */ | |
320 | ||
1da177e4 | 321 | static int |
4be44fcd LB |
322 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
323 | union acpi_object **levels) | |
1da177e4 | 324 | { |
4be44fcd LB |
325 | int status; |
326 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
327 | union acpi_object *obj; | |
1da177e4 | 328 | |
1da177e4 LT |
329 | |
330 | *levels = NULL; | |
331 | ||
90130268 | 332 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 333 | if (!ACPI_SUCCESS(status)) |
d550d98d | 334 | return status; |
4be44fcd | 335 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 336 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 337 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
338 | status = -EFAULT; |
339 | goto err; | |
340 | } | |
341 | ||
342 | *levels = obj; | |
343 | ||
d550d98d | 344 | return 0; |
1da177e4 | 345 | |
4be44fcd | 346 | err: |
6044ec88 | 347 | kfree(buffer.pointer); |
1da177e4 | 348 | |
d550d98d | 349 | return status; |
1da177e4 LT |
350 | } |
351 | ||
352 | static int | |
4be44fcd | 353 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 354 | { |
24450c7a | 355 | int status; |
4be44fcd LB |
356 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
357 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 358 | int state; |
1da177e4 | 359 | |
1da177e4 | 360 | arg0.integer.value = level; |
1da177e4 | 361 | |
24450c7a ZR |
362 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
363 | &args, NULL); | |
364 | if (ACPI_FAILURE(status)) { | |
365 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
366 | return -EIO; | |
367 | } | |
368 | ||
4500ca8e | 369 | device->brightness->curr = level; |
9e6dada9 | 370 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 371 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
372 | if (device->backlight) |
373 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
374 | return 0; |
375 | } | |
9e6dada9 | 376 | |
24450c7a ZR |
377 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
378 | return -EINVAL; | |
1da177e4 LT |
379 | } |
380 | ||
45cb50e6 ZR |
381 | /* |
382 | * For some buggy _BQC methods, we need to add a constant value to | |
383 | * the _BQC return value to get the actual current brightness level | |
384 | */ | |
385 | ||
386 | static int bqc_offset_aml_bug_workaround; | |
387 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
388 | { | |
389 | bqc_offset_aml_bug_workaround = 9; | |
390 | return 0; | |
391 | } | |
392 | ||
129ff8f8 ZR |
393 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
394 | { | |
395 | use_bios_initial_backlight = 0; | |
396 | return 0; | |
397 | } | |
398 | ||
45cb50e6 ZR |
399 | static struct dmi_system_id video_dmi_table[] __initdata = { |
400 | /* | |
401 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
402 | */ | |
403 | { | |
404 | .callback = video_set_bqc_offset, | |
405 | .ident = "Acer Aspire 5720", | |
406 | .matches = { | |
407 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
408 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
409 | }, | |
410 | }, | |
5afc4abe LB |
411 | { |
412 | .callback = video_set_bqc_offset, | |
413 | .ident = "Acer Aspire 5710Z", | |
414 | .matches = { | |
415 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
416 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
417 | }, | |
418 | }, | |
34ac272b ZR |
419 | { |
420 | .callback = video_set_bqc_offset, | |
421 | .ident = "eMachines E510", | |
422 | .matches = { | |
423 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
424 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
425 | }, | |
426 | }, | |
93bcece2 ZR |
427 | { |
428 | .callback = video_set_bqc_offset, | |
429 | .ident = "Acer Aspire 5315", | |
430 | .matches = { | |
431 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
432 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
433 | }, | |
434 | }, | |
152a4e63 ZR |
435 | { |
436 | .callback = video_set_bqc_offset, | |
437 | .ident = "Acer Aspire 7720", | |
438 | .matches = { | |
439 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
440 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
441 | }, | |
442 | }, | |
129ff8f8 ZR |
443 | { |
444 | .callback = video_ignore_initial_backlight, | |
445 | .ident = "HP Folio 13-2000", | |
446 | .matches = { | |
447 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
448 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
449 | }, | |
450 | }, | |
771d09b3 GMDV |
451 | { |
452 | .callback = video_ignore_initial_backlight, | |
453 | .ident = "HP Pavilion dm4", | |
454 | .matches = { | |
455 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
456 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
457 | }, | |
458 | }, | |
45cb50e6 ZR |
459 | {} |
460 | }; | |
461 | ||
994fa63c DB |
462 | static unsigned long long |
463 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
464 | unsigned long long bqc_value) | |
465 | { | |
466 | unsigned long long level; | |
467 | ||
468 | if (device->brightness->flags._BQC_use_index) { | |
469 | /* | |
470 | * _BQC returns an index that doesn't account for | |
471 | * the first 2 items with special meaning, so we need | |
472 | * to compensate for that by offsetting ourselves | |
473 | */ | |
474 | if (device->brightness->flags._BCL_reversed) | |
475 | bqc_value = device->brightness->count - 3 - bqc_value; | |
476 | ||
477 | level = device->brightness->levels[bqc_value + 2]; | |
478 | } else { | |
479 | level = bqc_value; | |
480 | } | |
481 | ||
482 | level += bqc_offset_aml_bug_workaround; | |
483 | ||
484 | return level; | |
485 | } | |
486 | ||
1da177e4 | 487 | static int |
4be44fcd | 488 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 489 | unsigned long long *level, bool raw) |
1da177e4 | 490 | { |
c8890f90 | 491 | acpi_status status = AE_OK; |
4e231fa4 | 492 | int i; |
c8890f90 | 493 | |
c60d638e ZR |
494 | if (device->cap._BQC || device->cap._BCQ) { |
495 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
496 | ||
497 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
498 | NULL, level); |
499 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
500 | if (raw) { |
501 | /* | |
502 | * Caller has indicated he wants the raw | |
503 | * value returned by _BQC, so don't furtherly | |
504 | * mess with the value. | |
505 | */ | |
506 | return 0; | |
507 | } | |
508 | ||
994fa63c | 509 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 510 | |
4e231fa4 VS |
511 | for (i = 2; i < device->brightness->count; i++) |
512 | if (device->brightness->levels[i] == *level) { | |
513 | device->brightness->curr = *level; | |
514 | return 0; | |
515 | } | |
a89803df DB |
516 | /* |
517 | * BQC returned an invalid level. | |
518 | * Stop using it. | |
519 | */ | |
520 | ACPI_WARNING((AE_INFO, | |
521 | "%s returned an invalid level", | |
522 | buf)); | |
523 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
524 | } else { |
525 | /* Fixme: | |
526 | * should we return an error or ignore this failure? | |
527 | * dev->brightness->curr is a cached value which stores | |
528 | * the correct current backlight level in most cases. | |
529 | * ACPI video backlight still works w/ buggy _BQC. | |
530 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
531 | */ | |
c60d638e ZR |
532 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
533 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
534 | } |
535 | } | |
536 | ||
4500ca8e | 537 | *level = device->brightness->curr; |
c8890f90 | 538 | return 0; |
1da177e4 LT |
539 | } |
540 | ||
541 | static int | |
4be44fcd LB |
542 | acpi_video_device_EDID(struct acpi_video_device *device, |
543 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 544 | { |
4be44fcd LB |
545 | int status; |
546 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
547 | union acpi_object *obj; | |
548 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
549 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 550 | |
1da177e4 LT |
551 | |
552 | *edid = NULL; | |
553 | ||
554 | if (!device) | |
d550d98d | 555 | return -ENODEV; |
1da177e4 LT |
556 | if (length == 128) |
557 | arg0.integer.value = 1; | |
558 | else if (length == 256) | |
559 | arg0.integer.value = 2; | |
560 | else | |
d550d98d | 561 | return -EINVAL; |
1da177e4 | 562 | |
90130268 | 563 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 564 | if (ACPI_FAILURE(status)) |
d550d98d | 565 | return -ENODEV; |
1da177e4 | 566 | |
50dd0969 | 567 | obj = buffer.pointer; |
1da177e4 LT |
568 | |
569 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
570 | *edid = obj; | |
571 | else { | |
6468463a | 572 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
573 | status = -EFAULT; |
574 | kfree(obj); | |
575 | } | |
576 | ||
d550d98d | 577 | return status; |
1da177e4 LT |
578 | } |
579 | ||
1da177e4 LT |
580 | /* bus */ |
581 | ||
1da177e4 LT |
582 | /* |
583 | * Arg: | |
584 | * video : video bus device pointer | |
585 | * bios_flag : | |
586 | * 0. The system BIOS should NOT automatically switch(toggle) | |
587 | * the active display output. | |
588 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 589 | * active display output. No switch event. |
1da177e4 LT |
590 | * 2. The _DGS value should be locked. |
591 | * 3. The system BIOS should not automatically switch (toggle) the | |
592 | * active display output, but instead generate the display switch | |
593 | * event notify code. | |
594 | * lcd_flag : | |
595 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 596 | * of the LCD when the power changes from AC to DC |
1da177e4 | 597 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 598 | * level of the LCD when the power changes from AC to DC. |
1da177e4 | 599 | * Return Value: |
ea9f8856 | 600 | * -EINVAL wrong arg. |
1da177e4 LT |
601 | */ |
602 | ||
603 | static int | |
4be44fcd | 604 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 605 | { |
ea9f8856 | 606 | acpi_status status; |
4be44fcd LB |
607 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
608 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 609 | |
b0373843 ZR |
610 | if (!video->cap._DOS) |
611 | return 0; | |
1da177e4 | 612 | |
ea9f8856 IM |
613 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
614 | return -EINVAL; | |
1da177e4 LT |
615 | arg0.integer.value = (lcd_flag << 2) | bios_flag; |
616 | video->dos_setting = arg0.integer.value; | |
ea9f8856 IM |
617 | status = acpi_evaluate_object(video->device->handle, "_DOS", |
618 | &args, NULL); | |
619 | if (ACPI_FAILURE(status)) | |
620 | return -EIO; | |
1da177e4 | 621 | |
ea9f8856 | 622 | return 0; |
1da177e4 LT |
623 | } |
624 | ||
935e5f29 ZR |
625 | /* |
626 | * Simple comparison function used to sort backlight levels. | |
627 | */ | |
628 | ||
629 | static int | |
630 | acpi_video_cmp_level(const void *a, const void *b) | |
631 | { | |
632 | return *(int *)a - *(int *)b; | |
633 | } | |
634 | ||
a50188da AL |
635 | /* |
636 | * Decides if _BQC/_BCQ for this system is usable | |
637 | * | |
638 | * We do this by changing the level first and then read out the current | |
639 | * brightness level, if the value does not match, find out if it is using | |
640 | * index. If not, clear the _BQC/_BCQ capability. | |
641 | */ | |
642 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
643 | int max_level, int current_level) | |
644 | { | |
645 | struct acpi_video_device_brightness *br = device->brightness; | |
646 | int result; | |
647 | unsigned long long level; | |
648 | int test_level; | |
649 | ||
650 | /* don't mess with existing known broken systems */ | |
651 | if (bqc_offset_aml_bug_workaround) | |
652 | return 0; | |
653 | ||
654 | /* | |
655 | * Some systems always report current brightness level as maximum | |
656 | * through _BQC, we need to test another value for them. | |
657 | */ | |
658 | test_level = current_level == max_level ? br->levels[2] : max_level; | |
659 | ||
660 | result = acpi_video_device_lcd_set_level(device, test_level); | |
661 | if (result) | |
662 | return result; | |
663 | ||
664 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
665 | if (result) | |
666 | return result; | |
667 | ||
668 | if (level != test_level) { | |
669 | /* buggy _BQC found, need to find out if it uses index */ | |
670 | if (level < br->count) { | |
671 | if (br->flags._BCL_reversed) | |
672 | level = br->count - 3 - level; | |
673 | if (br->levels[level + 2] == test_level) | |
674 | br->flags._BQC_use_index = 1; | |
675 | } | |
676 | ||
677 | if (!br->flags._BQC_use_index) | |
678 | device->cap._BQC = device->cap._BCQ = 0; | |
679 | } | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | ||
1da177e4 LT |
685 | /* |
686 | * Arg: | |
687 | * device : video output device (LCD, CRT, ..) | |
688 | * | |
689 | * Return Value: | |
469778c1 JJ |
690 | * Maximum brightness level |
691 | * | |
692 | * Allocate and initialize device->brightness. | |
693 | */ | |
694 | ||
695 | static int | |
696 | acpi_video_init_brightness(struct acpi_video_device *device) | |
697 | { | |
698 | union acpi_object *obj = NULL; | |
d32f6947 | 699 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 700 | unsigned long long level, level_old; |
469778c1 JJ |
701 | union acpi_object *o; |
702 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 703 | int result = -EINVAL; |
469778c1 JJ |
704 | |
705 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
706 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
707 | "LCD brightness level\n")); | |
708 | goto out; | |
709 | } | |
710 | ||
711 | if (obj->package.count < 2) | |
712 | goto out; | |
713 | ||
714 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
715 | if (!br) { | |
716 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 717 | result = -ENOMEM; |
469778c1 JJ |
718 | goto out; |
719 | } | |
720 | ||
d32f6947 | 721 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 722 | GFP_KERNEL); |
1a7c618a ZR |
723 | if (!br->levels) { |
724 | result = -ENOMEM; | |
469778c1 | 725 | goto out_free; |
1a7c618a | 726 | } |
469778c1 JJ |
727 | |
728 | for (i = 0; i < obj->package.count; i++) { | |
729 | o = (union acpi_object *)&obj->package.elements[i]; | |
730 | if (o->type != ACPI_TYPE_INTEGER) { | |
731 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
732 | continue; | |
733 | } | |
734 | br->levels[count] = (u32) o->integer.value; | |
735 | ||
736 | if (br->levels[count] > max_level) | |
737 | max_level = br->levels[count]; | |
738 | count++; | |
739 | } | |
740 | ||
d32f6947 ZR |
741 | /* |
742 | * some buggy BIOS don't export the levels | |
743 | * when machine is on AC/Battery in _BCL package. | |
744 | * In this case, the first two elements in _BCL packages | |
745 | * are also supported brightness levels that OS should take care of. | |
746 | */ | |
90af2cf6 ZR |
747 | for (i = 2; i < count; i++) { |
748 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 749 | level_ac_battery++; |
90af2cf6 ZR |
750 | if (br->levels[i] == br->levels[1]) |
751 | level_ac_battery++; | |
752 | } | |
d32f6947 ZR |
753 | |
754 | if (level_ac_battery < 2) { | |
755 | level_ac_battery = 2 - level_ac_battery; | |
756 | br->flags._BCL_no_ac_battery_levels = 1; | |
757 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
758 | br->levels[i] = br->levels[i - level_ac_battery]; | |
759 | count += level_ac_battery; | |
760 | } else if (level_ac_battery > 2) | |
bf6787eb | 761 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 762 | |
d80fb99f ZR |
763 | /* Check if the _BCL package is in a reversed order */ |
764 | if (max_level == br->levels[2]) { | |
765 | br->flags._BCL_reversed = 1; | |
766 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
767 | acpi_video_cmp_level, NULL); | |
768 | } else if (max_level != br->levels[count - 1]) | |
769 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 770 | "Found unordered _BCL package")); |
469778c1 JJ |
771 | |
772 | br->count = count; | |
773 | device->brightness = br; | |
1a7c618a ZR |
774 | |
775 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
776 | if ((max_level < 100) && (max_level <= (count - 2))) | |
777 | br->flags._BCL_use_index = 1; | |
778 | ||
779 | /* | |
780 | * _BCM is always consistent with _BCL, | |
781 | * at least for all the laptops we have ever seen. | |
782 | */ | |
783 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
784 | ||
785 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 786 | br->curr = level = max_level; |
e047cca6 ZR |
787 | |
788 | if (!device->cap._BQC) | |
789 | goto set_level; | |
790 | ||
a89803df DB |
791 | result = acpi_video_device_lcd_get_level_current(device, |
792 | &level_old, true); | |
1a7c618a ZR |
793 | if (result) |
794 | goto out_free_levels; | |
795 | ||
a50188da | 796 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
797 | if (result) |
798 | goto out_free_levels; | |
a50188da AL |
799 | /* |
800 | * cap._BQC may get cleared due to _BQC is found to be broken | |
801 | * in acpi_video_bqc_quirk, so check again here. | |
802 | */ | |
803 | if (!device->cap._BQC) | |
804 | goto set_level; | |
e047cca6 | 805 | |
994fa63c DB |
806 | if (use_bios_initial_backlight) { |
807 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 808 | /* |
994fa63c DB |
809 | * On some buggy laptops, _BQC returns an uninitialized |
810 | * value when invoked for the first time, i.e. | |
811 | * level_old is invalid (no matter whether it's a level | |
812 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 813 | */ |
994fa63c DB |
814 | for (i = 2; i < br->count; i++) |
815 | if (level_old == br->levels[i]) | |
816 | break; | |
817 | if (i == br->count) | |
818 | level = max_level; | |
90c53ca4 | 819 | } |
e047cca6 | 820 | |
e047cca6 | 821 | set_level: |
90c53ca4 | 822 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
823 | if (result) |
824 | goto out_free_levels; | |
1a7c618a | 825 | |
d32f6947 ZR |
826 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
827 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 828 | kfree(obj); |
1a7c618a | 829 | return result; |
469778c1 JJ |
830 | |
831 | out_free_levels: | |
832 | kfree(br->levels); | |
833 | out_free: | |
834 | kfree(br); | |
835 | out: | |
836 | device->brightness = NULL; | |
837 | kfree(obj); | |
1a7c618a | 838 | return result; |
469778c1 JJ |
839 | } |
840 | ||
841 | /* | |
842 | * Arg: | |
843 | * device : video output device (LCD, CRT, ..) | |
844 | * | |
845 | * Return Value: | |
1da177e4 LT |
846 | * None |
847 | * | |
98fb8fe1 | 848 | * Find out all required AML methods defined under the output |
1da177e4 LT |
849 | * device. |
850 | */ | |
851 | ||
4be44fcd | 852 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 853 | { |
1da177e4 | 854 | acpi_handle h_dummy1; |
1da177e4 | 855 | |
90130268 | 856 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
857 | device->cap._ADR = 1; |
858 | } | |
90130268 | 859 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 860 | device->cap._BCL = 1; |
1da177e4 | 861 | } |
90130268 | 862 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 863 | device->cap._BCM = 1; |
1da177e4 | 864 | } |
2f3d000a YL |
865 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
866 | device->cap._BQC = 1; | |
c60d638e ZR |
867 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
868 | &h_dummy1))) { | |
869 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
870 | device->cap._BCQ = 1; | |
871 | } | |
872 | ||
90130268 | 873 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 874 | device->cap._DDC = 1; |
1da177e4 | 875 | } |
1da177e4 | 876 | |
1a7c618a | 877 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 878 | struct backlight_properties props; |
9661e92c MG |
879 | struct pci_dev *pdev; |
880 | acpi_handle acpi_parent; | |
881 | struct device *parent = NULL; | |
702ed512 | 882 | int result; |
2f3d000a YL |
883 | static int count = 0; |
884 | char *name; | |
1a7c618a ZR |
885 | |
886 | result = acpi_video_init_brightness(device); | |
887 | if (result) | |
888 | return; | |
aeb834d9 | 889 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
890 | if (!name) |
891 | return; | |
aeb834d9 | 892 | count++; |
2f3d000a | 893 | |
9661e92c MG |
894 | acpi_get_parent(device->dev->handle, &acpi_parent); |
895 | ||
896 | pdev = acpi_get_pci_dev(acpi_parent); | |
897 | if (pdev) { | |
898 | parent = &pdev->dev; | |
899 | pci_dev_put(pdev); | |
900 | } | |
901 | ||
a19a6ee6 | 902 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 903 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 904 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
905 | device->backlight = backlight_device_register(name, |
906 | parent, | |
907 | device, | |
a19a6ee6 MG |
908 | &acpi_backlight_ops, |
909 | &props); | |
2f3d000a | 910 | kfree(name); |
e01ce79b ZR |
911 | if (IS_ERR(device->backlight)) |
912 | return; | |
702ed512 | 913 | |
ac7729da RW |
914 | /* |
915 | * Save current brightness level in case we have to restore it | |
916 | * before acpi_video_device_lcd_set_level() is called next time. | |
917 | */ | |
918 | device->backlight->props.brightness = | |
919 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 920 | |
4a703a8f | 921 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 922 | device->dev, &video_cooling_ops); |
4a703a8f | 923 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 924 | /* |
4a703a8f | 925 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
926 | * free it. |
927 | * Also, why the hell we are returning early and | |
928 | * not attempt to register video output if cooling | |
929 | * device registration failed? | |
930 | * -- dtor | |
931 | */ | |
4a703a8f | 932 | device->cooling_dev = NULL; |
43ff39f2 | 933 | return; |
4b4fe3b6 | 934 | } |
43ff39f2 | 935 | |
fc3a8828 | 936 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 937 | device->cooling_dev->id); |
9030062f | 938 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 939 | &device->cooling_dev->device.kobj, |
9030062f JL |
940 | "thermal_cooling"); |
941 | if (result) | |
942 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 943 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
944 | &device->dev->dev.kobj, "device"); |
945 | if (result) | |
946 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
947 | ||
2f3d000a | 948 | } |
1da177e4 LT |
949 | } |
950 | ||
951 | /* | |
952 | * Arg: | |
953 | * device : video output device (VGA) | |
954 | * | |
955 | * Return Value: | |
956 | * None | |
957 | * | |
98fb8fe1 | 958 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
959 | */ |
960 | ||
4be44fcd | 961 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 962 | { |
4be44fcd | 963 | acpi_handle h_dummy1; |
1da177e4 | 964 | |
90130268 | 965 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
966 | video->cap._DOS = 1; |
967 | } | |
90130268 | 968 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
969 | video->cap._DOD = 1; |
970 | } | |
90130268 | 971 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
972 | video->cap._ROM = 1; |
973 | } | |
90130268 | 974 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
975 | video->cap._GPD = 1; |
976 | } | |
90130268 | 977 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
978 | video->cap._SPD = 1; |
979 | } | |
90130268 | 980 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
981 | video->cap._VPO = 1; |
982 | } | |
983 | } | |
984 | ||
985 | /* | |
986 | * Check whether the video bus device has required AML method to | |
987 | * support the desired features | |
988 | */ | |
989 | ||
4be44fcd | 990 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 991 | { |
4be44fcd | 992 | acpi_status status = -ENOENT; |
1e4cffe7 | 993 | struct pci_dev *dev; |
1da177e4 LT |
994 | |
995 | if (!video) | |
d550d98d | 996 | return -EINVAL; |
1da177e4 | 997 | |
1e4cffe7 | 998 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
999 | if (!dev) |
1000 | return -ENODEV; | |
1e4cffe7 | 1001 | pci_dev_put(dev); |
22c13f9d | 1002 | |
1da177e4 LT |
1003 | /* Since there is no HID, CID and so on for VGA driver, we have |
1004 | * to check well known required nodes. | |
1005 | */ | |
1006 | ||
98fb8fe1 | 1007 | /* Does this device support video switching? */ |
3a1151e3 SB |
1008 | if (video->cap._DOS || video->cap._DOD) { |
1009 | if (!video->cap._DOS) { | |
1010 | printk(KERN_WARNING FW_BUG | |
1011 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1012 | acpi_device_bid(video->device)); | |
1013 | } | |
1da177e4 LT |
1014 | video->flags.multihead = 1; |
1015 | status = 0; | |
1016 | } | |
1017 | ||
98fb8fe1 | 1018 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1019 | if (video->cap._ROM) { |
1da177e4 LT |
1020 | video->flags.rom = 1; |
1021 | status = 0; | |
1022 | } | |
1023 | ||
98fb8fe1 | 1024 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1025 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1026 | video->flags.post = 1; |
1027 | status = 0; | |
1028 | } | |
1029 | ||
d550d98d | 1030 | return status; |
1da177e4 LT |
1031 | } |
1032 | ||
1da177e4 LT |
1033 | /* -------------------------------------------------------------------------- |
1034 | Driver Interface | |
1035 | -------------------------------------------------------------------------- */ | |
1036 | ||
1037 | /* device interface */ | |
82cae999 RZ |
1038 | static struct acpi_video_device_attrib* |
1039 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1040 | { | |
78eed028 DT |
1041 | struct acpi_video_enumerated_device *ids; |
1042 | int i; | |
1043 | ||
1044 | for (i = 0; i < video->attached_count; i++) { | |
1045 | ids = &video->attached_array[i]; | |
1046 | if ((ids->value.int_val & 0xffff) == device_id) | |
1047 | return &ids->value.attrib; | |
1048 | } | |
82cae999 | 1049 | |
82cae999 RZ |
1050 | return NULL; |
1051 | } | |
1da177e4 | 1052 | |
e92a7162 MG |
1053 | static int |
1054 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1055 | unsigned long device_id) | |
1056 | { | |
1057 | struct acpi_video_enumerated_device *ids; | |
1058 | int i; | |
1059 | ||
1060 | for (i = 0; i < video->attached_count; i++) { | |
1061 | ids = &video->attached_array[i]; | |
1062 | if ((ids->value.int_val & 0xffff) == device_id) | |
1063 | return ids->value.int_val; | |
1064 | } | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
1da177e4 | 1069 | static int |
4be44fcd LB |
1070 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1071 | struct acpi_video_bus *video) | |
1da177e4 | 1072 | { |
27663c58 | 1073 | unsigned long long device_id; |
e92a7162 | 1074 | int status, device_type; |
4be44fcd | 1075 | struct acpi_video_device *data; |
82cae999 | 1076 | struct acpi_video_device_attrib* attribute; |
1da177e4 | 1077 | |
4be44fcd LB |
1078 | status = |
1079 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1080 | /* Some device omits _ADR, we skip them instead of fail */ |
1081 | if (ACPI_FAILURE(status)) | |
1082 | return 0; | |
1da177e4 | 1083 | |
91e13aa3 AL |
1084 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1085 | if (!data) | |
1086 | return -ENOMEM; | |
82cae999 | 1087 | |
91e13aa3 AL |
1088 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1089 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1090 | device->driver_data = data; | |
1091 | ||
1092 | data->device_id = device_id; | |
1093 | data->video = video; | |
1094 | data->dev = device; | |
1095 | ||
1096 | attribute = acpi_video_get_device_attr(video, device_id); | |
1097 | ||
1098 | if((attribute != NULL) && attribute->device_id_scheme) { | |
1099 | switch (attribute->display_type) { | |
1100 | case ACPI_VIDEO_DISPLAY_CRT: | |
1101 | data->flags.crt = 1; | |
1102 | break; | |
1103 | case ACPI_VIDEO_DISPLAY_TV: | |
1104 | data->flags.tvout = 1; | |
1105 | break; | |
1106 | case ACPI_VIDEO_DISPLAY_DVI: | |
1107 | data->flags.dvi = 1; | |
1108 | break; | |
1109 | case ACPI_VIDEO_DISPLAY_LCD: | |
1110 | data->flags.lcd = 1; | |
1111 | break; | |
1112 | default: | |
1113 | data->flags.unknown = 1; | |
1114 | break; | |
1115 | } | |
1116 | if(attribute->bios_can_detect) | |
1117 | data->flags.bios = 1; | |
1118 | } else { | |
1119 | /* Check for legacy IDs */ | |
1120 | device_type = acpi_video_get_device_type(video, device_id); | |
1121 | /* Ignore bits 16 and 18-20 */ | |
1122 | switch (device_type & 0xffe2ffff) { | |
e92a7162 MG |
1123 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1124 | data->flags.crt = 1; | |
1125 | break; | |
1126 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1127 | data->flags.lcd = 1; | |
1128 | break; | |
1129 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1130 | data->flags.tvout = 1; | |
1131 | break; | |
1132 | default: | |
1133 | data->flags.unknown = 1; | |
e92a7162 | 1134 | } |
91e13aa3 | 1135 | } |
4be44fcd | 1136 | |
91e13aa3 AL |
1137 | acpi_video_device_bind(video, data); |
1138 | acpi_video_device_find_cap(data); | |
1da177e4 | 1139 | |
91e13aa3 AL |
1140 | status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
1141 | acpi_video_device_notify, data); | |
1142 | if (ACPI_FAILURE(status)) | |
1143 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1144 | else | |
1145 | data->flags.notify = 1; | |
1da177e4 | 1146 | |
91e13aa3 AL |
1147 | mutex_lock(&video->device_list_lock); |
1148 | list_add_tail(&data->entry, &video->video_device_list); | |
1149 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1150 | |
91e13aa3 | 1151 | return status; |
1da177e4 LT |
1152 | } |
1153 | ||
1154 | /* | |
1155 | * Arg: | |
1156 | * video : video bus device | |
1157 | * | |
1158 | * Return: | |
1159 | * none | |
1160 | * | |
1161 | * Enumerate the video device list of the video bus, | |
1162 | * bind the ids with the corresponding video devices | |
1163 | * under the video bus. | |
4be44fcd | 1164 | */ |
1da177e4 | 1165 | |
4be44fcd | 1166 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1167 | { |
ff102ea9 DT |
1168 | struct acpi_video_device *dev; |
1169 | ||
bbac81f5 | 1170 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1171 | |
1172 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1173 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1174 | |
bbac81f5 | 1175 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | /* | |
1179 | * Arg: | |
1180 | * video : video bus device | |
1181 | * device : video output device under the video | |
1182 | * bus | |
1183 | * | |
1184 | * Return: | |
1185 | * none | |
1186 | * | |
1187 | * Bind the ids with the corresponding video devices | |
1188 | * under the video bus. | |
4be44fcd | 1189 | */ |
1da177e4 LT |
1190 | |
1191 | static void | |
4be44fcd LB |
1192 | acpi_video_device_bind(struct acpi_video_bus *video, |
1193 | struct acpi_video_device *device) | |
1da177e4 | 1194 | { |
78eed028 | 1195 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1196 | int i; |
1da177e4 | 1197 | |
78eed028 DT |
1198 | for (i = 0; i < video->attached_count; i++) { |
1199 | ids = &video->attached_array[i]; | |
1200 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1201 | ids->bind_info = device; | |
1da177e4 LT |
1202 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1203 | } | |
1204 | } | |
1da177e4 LT |
1205 | } |
1206 | ||
1207 | /* | |
1208 | * Arg: | |
1209 | * video : video bus device | |
1210 | * | |
1211 | * Return: | |
1212 | * < 0 : error | |
1213 | * | |
1214 | * Call _DOD to enumerate all devices attached to display adapter | |
1215 | * | |
4be44fcd | 1216 | */ |
1da177e4 LT |
1217 | |
1218 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1219 | { | |
4be44fcd LB |
1220 | int status; |
1221 | int count; | |
1222 | int i; | |
78eed028 | 1223 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1224 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1225 | union acpi_object *dod = NULL; | |
1226 | union acpi_object *obj; | |
1da177e4 | 1227 | |
90130268 | 1228 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1229 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1230 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1231 | return status; |
1da177e4 LT |
1232 | } |
1233 | ||
50dd0969 | 1234 | dod = buffer.pointer; |
1da177e4 | 1235 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1236 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1237 | status = -EFAULT; |
1238 | goto out; | |
1239 | } | |
1240 | ||
1241 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1242 | dod->package.count)); |
1da177e4 | 1243 | |
78eed028 DT |
1244 | active_list = kcalloc(1 + dod->package.count, |
1245 | sizeof(struct acpi_video_enumerated_device), | |
1246 | GFP_KERNEL); | |
1247 | if (!active_list) { | |
1da177e4 LT |
1248 | status = -ENOMEM; |
1249 | goto out; | |
1250 | } | |
1251 | ||
1252 | count = 0; | |
1253 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1254 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1255 | |
1256 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1257 | printk(KERN_ERR PREFIX |
1258 | "Invalid _DOD data in element %d\n", i); | |
1259 | continue; | |
1da177e4 | 1260 | } |
78eed028 DT |
1261 | |
1262 | active_list[count].value.int_val = obj->integer.value; | |
1263 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1265 | (int)obj->integer.value)); | |
1da177e4 LT |
1266 | count++; |
1267 | } | |
1da177e4 | 1268 | |
6044ec88 | 1269 | kfree(video->attached_array); |
4be44fcd | 1270 | |
78eed028 | 1271 | video->attached_array = active_list; |
1da177e4 | 1272 | video->attached_count = count; |
78eed028 DT |
1273 | |
1274 | out: | |
02438d87 | 1275 | kfree(buffer.pointer); |
d550d98d | 1276 | return status; |
1da177e4 LT |
1277 | } |
1278 | ||
4be44fcd LB |
1279 | static int |
1280 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1281 | u32 level_current, u32 event) | |
1da177e4 | 1282 | { |
63f0edfc | 1283 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1284 | max = max_below = 0; |
1285 | min = min_above = 255; | |
63f0edfc | 1286 | /* Find closest level to level_current */ |
0a3db1ce | 1287 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1288 | l = device->brightness->levels[i]; |
1289 | if (abs(l - level_current) < abs(delta)) { | |
1290 | delta = l - level_current; | |
1291 | if (!delta) | |
1292 | break; | |
1293 | } | |
1294 | } | |
1295 | /* Ajust level_current to closest available level */ | |
1296 | level_current += delta; | |
0a3db1ce | 1297 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1298 | l = device->brightness->levels[i]; |
1299 | if (l < min) | |
1300 | min = l; | |
1301 | if (l > max) | |
1302 | max = l; | |
1303 | if (l < min_above && l > level_current) | |
1304 | min_above = l; | |
1305 | if (l > max_below && l < level_current) | |
1306 | max_below = l; | |
1307 | } | |
1308 | ||
1309 | switch (event) { | |
1310 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1311 | return (level_current < max) ? min_above : min; | |
1312 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1313 | return (level_current < max) ? min_above : max; | |
1314 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1315 | return (level_current > min) ? max_below : min; | |
1316 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1317 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1318 | return 0; | |
1319 | default: | |
1320 | return level_current; | |
1321 | } | |
1da177e4 LT |
1322 | } |
1323 | ||
c8890f90 | 1324 | static int |
4be44fcd | 1325 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1326 | { |
27663c58 | 1327 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1328 | int result = -EINVAL; |
1329 | ||
28c32e99 ZR |
1330 | /* no warning message if acpi_backlight=vendor is used */ |
1331 | if (!acpi_video_backlight_support()) | |
1332 | return 0; | |
1333 | ||
469778c1 | 1334 | if (!device->brightness) |
c8890f90 ZR |
1335 | goto out; |
1336 | ||
1337 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1338 | &level_current, |
1339 | false); | |
c8890f90 ZR |
1340 | if (result) |
1341 | goto out; | |
1342 | ||
1da177e4 | 1343 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1344 | |
24450c7a | 1345 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1346 | |
36342742 MG |
1347 | if (!result) |
1348 | backlight_force_update(device->backlight, | |
1349 | BACKLIGHT_UPDATE_HOTKEY); | |
1350 | ||
c8890f90 ZR |
1351 | out: |
1352 | if (result) | |
1353 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1354 | ||
1355 | return result; | |
1da177e4 LT |
1356 | } |
1357 | ||
e92a7162 MG |
1358 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1359 | void **edid) | |
1360 | { | |
1361 | struct acpi_video_bus *video; | |
1362 | struct acpi_video_device *video_device; | |
1363 | union acpi_object *buffer = NULL; | |
1364 | acpi_status status; | |
1365 | int i, length; | |
1366 | ||
1367 | if (!device || !acpi_driver_data(device)) | |
1368 | return -EINVAL; | |
1369 | ||
1370 | video = acpi_driver_data(device); | |
1371 | ||
1372 | for (i = 0; i < video->attached_count; i++) { | |
1373 | video_device = video->attached_array[i].bind_info; | |
1374 | length = 256; | |
1375 | ||
1376 | if (!video_device) | |
1377 | continue; | |
1378 | ||
82069552 ZR |
1379 | if (!video_device->cap._DDC) |
1380 | continue; | |
1381 | ||
e92a7162 MG |
1382 | if (type) { |
1383 | switch (type) { | |
1384 | case ACPI_VIDEO_DISPLAY_CRT: | |
1385 | if (!video_device->flags.crt) | |
1386 | continue; | |
1387 | break; | |
1388 | case ACPI_VIDEO_DISPLAY_TV: | |
1389 | if (!video_device->flags.tvout) | |
1390 | continue; | |
1391 | break; | |
1392 | case ACPI_VIDEO_DISPLAY_DVI: | |
1393 | if (!video_device->flags.dvi) | |
1394 | continue; | |
1395 | break; | |
1396 | case ACPI_VIDEO_DISPLAY_LCD: | |
1397 | if (!video_device->flags.lcd) | |
1398 | continue; | |
1399 | break; | |
1400 | } | |
1401 | } else if (video_device->device_id != device_id) { | |
1402 | continue; | |
1403 | } | |
1404 | ||
1405 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1406 | ||
1407 | if (ACPI_FAILURE(status) || !buffer || | |
1408 | buffer->type != ACPI_TYPE_BUFFER) { | |
1409 | length = 128; | |
1410 | status = acpi_video_device_EDID(video_device, &buffer, | |
1411 | length); | |
1412 | if (ACPI_FAILURE(status) || !buffer || | |
1413 | buffer->type != ACPI_TYPE_BUFFER) { | |
1414 | continue; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | *edid = buffer->buffer.pointer; | |
1419 | return length; | |
1420 | } | |
1421 | ||
1422 | return -ENODEV; | |
1423 | } | |
1424 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1425 | ||
1da177e4 | 1426 | static int |
4be44fcd LB |
1427 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1428 | struct acpi_device *device) | |
1da177e4 | 1429 | { |
fba4e087 | 1430 | int status = 0; |
ff102ea9 | 1431 | struct acpi_device *dev; |
1da177e4 | 1432 | |
fba4e087 IM |
1433 | /* |
1434 | * There are systems where video module known to work fine regardless | |
1435 | * of broken _DOD and ignoring returned value here doesn't cause | |
1436 | * any issues later. | |
1437 | */ | |
1438 | acpi_video_device_enumerate(video); | |
1da177e4 | 1439 | |
ff102ea9 | 1440 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1441 | |
1442 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1443 | if (status) { |
91e13aa3 AL |
1444 | dev_err(&dev->dev, "Can't attach device\n"); |
1445 | break; | |
1da177e4 | 1446 | } |
1da177e4 | 1447 | } |
d550d98d | 1448 | return status; |
1da177e4 LT |
1449 | } |
1450 | ||
4be44fcd | 1451 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1452 | { |
031ec77b | 1453 | acpi_status status; |
1da177e4 LT |
1454 | |
1455 | if (!device || !device->video) | |
d550d98d | 1456 | return -ENOENT; |
1da177e4 | 1457 | |
91e13aa3 AL |
1458 | if (device->flags.notify) { |
1459 | status = acpi_remove_notify_handler(device->dev->handle, | |
1460 | ACPI_DEVICE_NOTIFY, acpi_video_device_notify); | |
1461 | if (ACPI_FAILURE(status)) | |
1462 | dev_err(&device->dev->dev, | |
1463 | "Can't remove video notify handler\n"); | |
cfa806f0 | 1464 | } |
91e13aa3 | 1465 | |
e29b3ee3 | 1466 | if (device->backlight) { |
e29b3ee3 KP |
1467 | backlight_device_unregister(device->backlight); |
1468 | device->backlight = NULL; | |
1469 | } | |
4a703a8f | 1470 | if (device->cooling_dev) { |
702ed512 ZR |
1471 | sysfs_remove_link(&device->dev->dev.kobj, |
1472 | "thermal_cooling"); | |
4a703a8f | 1473 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1474 | "device"); |
4a703a8f DT |
1475 | thermal_cooling_device_unregister(device->cooling_dev); |
1476 | device->cooling_dev = NULL; | |
702ed512 | 1477 | } |
ff102ea9 | 1478 | |
d550d98d | 1479 | return 0; |
1da177e4 LT |
1480 | } |
1481 | ||
4be44fcd | 1482 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1483 | { |
4be44fcd | 1484 | int status; |
ff102ea9 | 1485 | struct acpi_video_device *dev, *next; |
1da177e4 | 1486 | |
bbac81f5 | 1487 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1488 | |
ff102ea9 | 1489 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1490 | |
ff102ea9 | 1491 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1492 | if (ACPI_FAILURE(status)) |
1493 | printk(KERN_WARNING PREFIX | |
1494 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1495 | |
ff102ea9 DT |
1496 | if (dev->brightness) { |
1497 | kfree(dev->brightness->levels); | |
1498 | kfree(dev->brightness); | |
1499 | } | |
1500 | list_del(&dev->entry); | |
1501 | kfree(dev); | |
1da177e4 LT |
1502 | } |
1503 | ||
bbac81f5 | 1504 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1505 | |
d550d98d | 1506 | return 0; |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | /* acpi_video interface */ | |
1510 | ||
4be44fcd | 1511 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1512 | { |
a21101c4 | 1513 | return acpi_video_bus_DOS(video, 0, 0); |
1da177e4 LT |
1514 | } |
1515 | ||
4be44fcd | 1516 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 LT |
1517 | { |
1518 | return acpi_video_bus_DOS(video, 0, 1); | |
1519 | } | |
1520 | ||
7015558f | 1521 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1522 | { |
7015558f | 1523 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1524 | struct input_dev *input; |
17c452f9 | 1525 | int keycode = 0; |
e9dab196 | 1526 | |
1da177e4 | 1527 | if (!video) |
d550d98d | 1528 | return; |
1da177e4 | 1529 | |
e9dab196 | 1530 | input = video->input; |
1da177e4 LT |
1531 | |
1532 | switch (event) { | |
98fb8fe1 | 1533 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1534 | * most likely via hotkey. */ |
14e04fb3 | 1535 | acpi_bus_generate_proc_event(device, event, 0); |
8a37c65d | 1536 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1537 | break; |
1538 | ||
98fb8fe1 | 1539 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1540 | * connector. */ |
1541 | acpi_video_device_enumerate(video); | |
1542 | acpi_video_device_rebind(video); | |
14e04fb3 | 1543 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1544 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1545 | break; |
1546 | ||
4be44fcd | 1547 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 1548 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1549 | keycode = KEY_SWITCHVIDEOMODE; |
1550 | break; | |
4be44fcd | 1551 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 1552 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1553 | keycode = KEY_VIDEO_NEXT; |
1554 | break; | |
4be44fcd | 1555 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 1556 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1557 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1558 | break; |
1559 | ||
1560 | default: | |
1561 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1562 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1563 | break; |
1564 | } | |
1565 | ||
8a37c65d LT |
1566 | if (acpi_notifier_call_chain(device, event, 0)) |
1567 | /* Something vetoed the keypress. */ | |
1568 | keycode = 0; | |
17c452f9 MG |
1569 | |
1570 | if (keycode) { | |
1571 | input_report_key(input, keycode, 1); | |
1572 | input_sync(input); | |
1573 | input_report_key(input, keycode, 0); | |
1574 | input_sync(input); | |
1575 | } | |
e9dab196 | 1576 | |
d550d98d | 1577 | return; |
1da177e4 LT |
1578 | } |
1579 | ||
4be44fcd | 1580 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1581 | { |
50dd0969 | 1582 | struct acpi_video_device *video_device = data; |
4be44fcd | 1583 | struct acpi_device *device = NULL; |
e9dab196 LY |
1584 | struct acpi_video_bus *bus; |
1585 | struct input_dev *input; | |
17c452f9 | 1586 | int keycode = 0; |
1da177e4 | 1587 | |
1da177e4 | 1588 | if (!video_device) |
d550d98d | 1589 | return; |
1da177e4 | 1590 | |
e6afa0de | 1591 | device = video_device->dev; |
e9dab196 LY |
1592 | bus = video_device->video; |
1593 | input = bus->input; | |
1da177e4 LT |
1594 | |
1595 | switch (event) { | |
4be44fcd | 1596 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1597 | if (brightness_switch_enabled) |
1598 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1599 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1600 | keycode = KEY_BRIGHTNESS_CYCLE; |
1601 | break; | |
4be44fcd | 1602 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1603 | if (brightness_switch_enabled) |
1604 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1605 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1606 | keycode = KEY_BRIGHTNESSUP; |
1607 | break; | |
4be44fcd | 1608 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1609 | if (brightness_switch_enabled) |
1610 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1611 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1612 | keycode = KEY_BRIGHTNESSDOWN; |
1613 | break; | |
70f23fd6 | 1614 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1615 | if (brightness_switch_enabled) |
1616 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1617 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1618 | keycode = KEY_BRIGHTNESS_ZERO; |
1619 | break; | |
4be44fcd | 1620 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1621 | if (brightness_switch_enabled) |
1622 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1623 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1624 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1625 | break; |
1626 | default: | |
1627 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1628 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1629 | break; |
1630 | } | |
e9dab196 | 1631 | |
7761f638 | 1632 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1633 | |
1634 | if (keycode) { | |
1635 | input_report_key(input, keycode, 1); | |
1636 | input_sync(input); | |
1637 | input_report_key(input, keycode, 0); | |
1638 | input_sync(input); | |
1639 | } | |
e9dab196 | 1640 | |
d550d98d | 1641 | return; |
1da177e4 LT |
1642 | } |
1643 | ||
ac7729da RW |
1644 | static int acpi_video_resume(struct notifier_block *nb, |
1645 | unsigned long val, void *ign) | |
863c1490 MG |
1646 | { |
1647 | struct acpi_video_bus *video; | |
1648 | struct acpi_video_device *video_device; | |
1649 | int i; | |
1650 | ||
ac7729da RW |
1651 | switch (val) { |
1652 | case PM_HIBERNATION_PREPARE: | |
1653 | case PM_SUSPEND_PREPARE: | |
1654 | case PM_RESTORE_PREPARE: | |
1655 | return NOTIFY_DONE; | |
1656 | } | |
863c1490 | 1657 | |
ac7729da RW |
1658 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1659 | ||
1660 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1661 | |
1662 | for (i = 0; i < video->attached_count; i++) { | |
1663 | video_device = video->attached_array[i].bind_info; | |
1664 | if (video_device && video_device->backlight) | |
1665 | acpi_video_set_brightness(video_device->backlight); | |
1666 | } | |
ac7729da RW |
1667 | |
1668 | return NOTIFY_OK; | |
863c1490 MG |
1669 | } |
1670 | ||
c504f8cb ZR |
1671 | static acpi_status |
1672 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1673 | void **return_value) | |
1674 | { | |
1675 | struct acpi_device *device = context; | |
1676 | struct acpi_device *sibling; | |
1677 | int result; | |
1678 | ||
1679 | if (handle == device->handle) | |
1680 | return AE_CTRL_TERMINATE; | |
1681 | ||
1682 | result = acpi_bus_get_device(handle, &sibling); | |
1683 | if (result) | |
1684 | return AE_OK; | |
1685 | ||
1686 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1687 | return AE_ALREADY_EXISTS; | |
1688 | ||
1689 | return AE_OK; | |
1690 | } | |
1691 | ||
ac7729da RW |
1692 | static int instance; |
1693 | ||
4be44fcd | 1694 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1695 | { |
f51e8391 | 1696 | struct acpi_video_bus *video; |
e9dab196 | 1697 | struct input_dev *input; |
f51e8391 | 1698 | int error; |
c504f8cb ZR |
1699 | acpi_status status; |
1700 | ||
1701 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1702 | device->parent->handle, 1, | |
1703 | acpi_video_bus_match, NULL, | |
1704 | device, NULL); | |
1705 | if (status == AE_ALREADY_EXISTS) { | |
1706 | printk(KERN_WARNING FW_BUG | |
1707 | "Duplicate ACPI video bus devices for the" | |
1708 | " same VGA controller, please try module " | |
1709 | "parameter \"video.allow_duplicates=1\"" | |
1710 | "if the current driver doesn't work.\n"); | |
1711 | if (!allow_duplicates) | |
1712 | return -ENODEV; | |
1713 | } | |
1da177e4 | 1714 | |
36bcbec7 | 1715 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1716 | if (!video) |
d550d98d | 1717 | return -ENOMEM; |
1da177e4 | 1718 | |
e6d9da1d ZR |
1719 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1720 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1721 | if (instance) | |
1722 | device->pnp.bus_id[3] = '0' + instance; | |
1723 | instance ++; | |
1724 | } | |
f3b39f13 ZY |
1725 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1726 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1727 | if (instance) | |
1728 | device->pnp.bus_id[3] = '0' + instance; | |
1729 | instance++; | |
1730 | } | |
e6d9da1d | 1731 | |
e6afa0de | 1732 | video->device = device; |
1da177e4 LT |
1733 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1734 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1735 | device->driver_data = video; |
1da177e4 LT |
1736 | |
1737 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1738 | error = acpi_video_bus_check(video); |
1739 | if (error) | |
1740 | goto err_free_video; | |
1da177e4 | 1741 | |
bbac81f5 | 1742 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1743 | INIT_LIST_HEAD(&video->video_device_list); |
1744 | ||
ea9f8856 IM |
1745 | error = acpi_video_bus_get_devices(video, device); |
1746 | if (error) | |
91e13aa3 | 1747 | goto err_put_video; |
1da177e4 | 1748 | |
e9dab196 | 1749 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1750 | if (!input) { |
1751 | error = -ENOMEM; | |
b60e7f61 | 1752 | goto err_put_video; |
f51e8391 | 1753 | } |
e9dab196 | 1754 | |
b60e7f61 IM |
1755 | error = acpi_video_bus_start_devices(video); |
1756 | if (error) | |
1757 | goto err_free_input_dev; | |
1758 | ||
e9dab196 LY |
1759 | snprintf(video->phys, sizeof(video->phys), |
1760 | "%s/video/input0", acpi_device_hid(video->device)); | |
1761 | ||
1762 | input->name = acpi_device_name(video->device); | |
1763 | input->phys = video->phys; | |
1764 | input->id.bustype = BUS_HOST; | |
1765 | input->id.product = 0x06; | |
91c05c66 | 1766 | input->dev.parent = &device->dev; |
e9dab196 LY |
1767 | input->evbit[0] = BIT(EV_KEY); |
1768 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1769 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1770 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1771 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1772 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1773 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1774 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1775 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1776 | |
1da177e4 | 1777 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1778 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1779 | video->flags.multihead ? "yes" : "no", | |
1780 | video->flags.rom ? "yes" : "no", | |
1781 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1782 | |
ac7729da RW |
1783 | video->pm_nb.notifier_call = acpi_video_resume; |
1784 | video->pm_nb.priority = 0; | |
ea9f8856 IM |
1785 | error = register_pm_notifier(&video->pm_nb); |
1786 | if (error) | |
301f33fb DC |
1787 | goto err_stop_video; |
1788 | ||
1789 | error = input_register_device(input); | |
1790 | if (error) | |
1791 | goto err_unregister_pm_notifier; | |
ac7729da | 1792 | |
f51e8391 DT |
1793 | return 0; |
1794 | ||
301f33fb DC |
1795 | err_unregister_pm_notifier: |
1796 | unregister_pm_notifier(&video->pm_nb); | |
f51e8391 DT |
1797 | err_stop_video: |
1798 | acpi_video_bus_stop_devices(video); | |
b60e7f61 IM |
1799 | err_free_input_dev: |
1800 | input_free_device(input); | |
ea9f8856 | 1801 | err_put_video: |
f51e8391 DT |
1802 | acpi_video_bus_put_devices(video); |
1803 | kfree(video->attached_array); | |
f51e8391 DT |
1804 | err_free_video: |
1805 | kfree(video); | |
db89b4f0 | 1806 | device->driver_data = NULL; |
1da177e4 | 1807 | |
f51e8391 | 1808 | return error; |
1da177e4 LT |
1809 | } |
1810 | ||
51fac838 | 1811 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1812 | { |
4be44fcd | 1813 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1814 | |
1da177e4 LT |
1815 | |
1816 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1817 | return -EINVAL; |
1da177e4 | 1818 | |
50dd0969 | 1819 | video = acpi_driver_data(device); |
1da177e4 | 1820 | |
ac7729da RW |
1821 | unregister_pm_notifier(&video->pm_nb); |
1822 | ||
1da177e4 | 1823 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1824 | acpi_video_bus_put_devices(video); |
1da177e4 | 1825 | |
e9dab196 | 1826 | input_unregister_device(video->input); |
6044ec88 | 1827 | kfree(video->attached_array); |
1da177e4 LT |
1828 | kfree(video); |
1829 | ||
d550d98d | 1830 | return 0; |
1da177e4 LT |
1831 | } |
1832 | ||
c6996bdd AC |
1833 | static int __init is_i740(struct pci_dev *dev) |
1834 | { | |
1835 | if (dev->device == 0x00D1) | |
1836 | return 1; | |
1837 | if (dev->device == 0x7000) | |
1838 | return 1; | |
1839 | return 0; | |
1840 | } | |
1841 | ||
74a365b3 MG |
1842 | static int __init intel_opregion_present(void) |
1843 | { | |
c6996bdd | 1844 | int opregion = 0; |
74a365b3 MG |
1845 | struct pci_dev *dev = NULL; |
1846 | u32 address; | |
1847 | ||
1848 | for_each_pci_dev(dev) { | |
1849 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1850 | continue; | |
1851 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1852 | continue; | |
c6996bdd AC |
1853 | /* We don't want to poke around undefined i740 registers */ |
1854 | if (is_i740(dev)) | |
1855 | continue; | |
74a365b3 MG |
1856 | pci_read_config_dword(dev, 0xfc, &address); |
1857 | if (!address) | |
1858 | continue; | |
c6996bdd | 1859 | opregion = 1; |
74a365b3 | 1860 | } |
c6996bdd | 1861 | return opregion; |
74a365b3 MG |
1862 | } |
1863 | ||
1864 | int acpi_video_register(void) | |
1da177e4 | 1865 | { |
4be44fcd | 1866 | int result = 0; |
86e437f0 ZY |
1867 | if (register_count) { |
1868 | /* | |
1869 | * if the function of acpi_video_register is already called, | |
1870 | * don't register the acpi_vide_bus again and return no error. | |
1871 | */ | |
1872 | return 0; | |
1873 | } | |
1da177e4 | 1874 | |
1da177e4 | 1875 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1876 | if (result < 0) |
d550d98d | 1877 | return -ENODEV; |
1da177e4 | 1878 | |
86e437f0 ZY |
1879 | /* |
1880 | * When the acpi_video_bus is loaded successfully, increase | |
1881 | * the counter reference. | |
1882 | */ | |
1883 | register_count = 1; | |
1884 | ||
d550d98d | 1885 | return 0; |
1da177e4 | 1886 | } |
74a365b3 MG |
1887 | EXPORT_SYMBOL(acpi_video_register); |
1888 | ||
86e437f0 ZY |
1889 | void acpi_video_unregister(void) |
1890 | { | |
1891 | if (!register_count) { | |
1892 | /* | |
1893 | * If the acpi video bus is already unloaded, don't | |
1894 | * unload it again and return directly. | |
1895 | */ | |
1896 | return; | |
1897 | } | |
1898 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1899 | ||
86e437f0 ZY |
1900 | register_count = 0; |
1901 | ||
1902 | return; | |
1903 | } | |
1904 | EXPORT_SYMBOL(acpi_video_unregister); | |
1905 | ||
74a365b3 MG |
1906 | /* |
1907 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1908 | * the video opregion code to be run first in order to initialise | |
1909 | * state before any ACPI video calls are made. To handle this we defer | |
1910 | * registration of the video class until the opregion code has run. | |
1911 | */ | |
1912 | ||
1913 | static int __init acpi_video_init(void) | |
1914 | { | |
45cb50e6 ZR |
1915 | dmi_check_system(video_dmi_table); |
1916 | ||
74a365b3 MG |
1917 | if (intel_opregion_present()) |
1918 | return 0; | |
1919 | ||
1920 | return acpi_video_register(); | |
1921 | } | |
1da177e4 | 1922 | |
86e437f0 | 1923 | static void __exit acpi_video_exit(void) |
1da177e4 | 1924 | { |
86e437f0 | 1925 | acpi_video_unregister(); |
1da177e4 | 1926 | |
d550d98d | 1927 | return; |
1da177e4 LT |
1928 | } |
1929 | ||
1930 | module_init(acpi_video_init); | |
1931 | module_exit(acpi_video_exit); |