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; | |
82cae999 | 170 | u8 reserved:2; |
1da177e4 LT |
171 | }; |
172 | ||
173 | struct acpi_video_device_cap { | |
4be44fcd LB |
174 | u8 _ADR:1; /*Return the unique ID */ |
175 | u8 _BCL:1; /*Query list of brightness control levels supported */ | |
176 | u8 _BCM:1; /*Set the brightness level */ | |
2f3d000a | 177 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 178 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
4be44fcd | 179 | u8 _DDC:1; /*Return the EDID for this device */ |
1da177e4 LT |
180 | }; |
181 | ||
d32f6947 ZR |
182 | struct acpi_video_brightness_flags { |
183 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
d80fb99f | 184 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order*/ |
1a7c618a ZR |
185 | u8 _BCL_use_index:1; /* levels in _BCL are index values */ |
186 | u8 _BCM_use_index:1; /* input of _BCM is an index value */ | |
187 | u8 _BQC_use_index:1; /* _BQC returns an index value */ | |
d32f6947 ZR |
188 | }; |
189 | ||
1da177e4 | 190 | struct acpi_video_device_brightness { |
4be44fcd LB |
191 | int curr; |
192 | int count; | |
193 | int *levels; | |
d32f6947 | 194 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
195 | }; |
196 | ||
197 | struct acpi_video_device { | |
4be44fcd LB |
198 | unsigned long device_id; |
199 | struct acpi_video_device_flags flags; | |
200 | struct acpi_video_device_cap cap; | |
201 | struct list_head entry; | |
202 | struct acpi_video_bus *video; | |
203 | struct acpi_device *dev; | |
1da177e4 | 204 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 205 | struct backlight_device *backlight; |
4a703a8f | 206 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
207 | }; |
208 | ||
b7171ae7 | 209 | static const char device_decode[][30] = { |
1da177e4 LT |
210 | "motherboard VGA device", |
211 | "PCI VGA device", | |
212 | "AGP VGA device", | |
213 | "UNKNOWN", | |
214 | }; | |
215 | ||
4be44fcd LB |
216 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
217 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
218 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
219 | struct acpi_video_device *device); | |
1da177e4 | 220 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
221 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
222 | int level); | |
223 | static int acpi_video_device_lcd_get_level_current( | |
224 | struct acpi_video_device *device, | |
a89803df | 225 | unsigned long long *level, bool raw); |
4be44fcd LB |
226 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
227 | u32 level_current, u32 event); | |
c8890f90 | 228 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 229 | int event); |
1da177e4 | 230 | |
2f3d000a YL |
231 | /*backlight device sysfs support*/ |
232 | static int acpi_video_get_brightness(struct backlight_device *bd) | |
233 | { | |
27663c58 | 234 | unsigned long long cur_level; |
38531e6f | 235 | int i; |
2f3d000a | 236 | struct acpi_video_device *vd = |
655bfd7a | 237 | (struct acpi_video_device *)bl_get_data(bd); |
c8890f90 | 238 | |
a89803df | 239 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 240 | return -EINVAL; |
38531e6f MG |
241 | for (i = 2; i < vd->brightness->count; i++) { |
242 | if (vd->brightness->levels[i] == cur_level) | |
243 | /* The first two entries are special - see page 575 | |
244 | of the ACPI spec 3.0 */ | |
245 | return i-2; | |
246 | } | |
247 | return 0; | |
2f3d000a YL |
248 | } |
249 | ||
250 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
251 | { | |
24450c7a | 252 | int request_level = bd->props.brightness + 2; |
2f3d000a | 253 | struct acpi_video_device *vd = |
655bfd7a | 254 | (struct acpi_video_device *)bl_get_data(bd); |
24450c7a ZR |
255 | |
256 | return acpi_video_device_lcd_set_level(vd, | |
257 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
258 | } |
259 | ||
acc2472e | 260 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
261 | .get_brightness = acpi_video_get_brightness, |
262 | .update_status = acpi_video_set_brightness, | |
263 | }; | |
264 | ||
702ed512 | 265 | /* thermal cooling device callbacks */ |
4a703a8f | 266 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 267 | long *state) |
702ed512 | 268 | { |
4a703a8f | 269 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
270 | struct acpi_video_device *video = acpi_driver_data(device); |
271 | ||
6503e5df MG |
272 | *state = video->brightness->count - 3; |
273 | return 0; | |
702ed512 ZR |
274 | } |
275 | ||
4a703a8f | 276 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 277 | long *state) |
702ed512 | 278 | { |
4a703a8f | 279 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 280 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 281 | unsigned long long level; |
6503e5df | 282 | int offset; |
702ed512 | 283 | |
a89803df | 284 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 285 | return -EINVAL; |
6503e5df MG |
286 | for (offset = 2; offset < video->brightness->count; offset++) |
287 | if (level == video->brightness->levels[offset]) { | |
288 | *state = video->brightness->count - offset - 1; | |
289 | return 0; | |
290 | } | |
702ed512 ZR |
291 | |
292 | return -EINVAL; | |
293 | } | |
294 | ||
295 | static int | |
4a703a8f | 296 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 297 | { |
4a703a8f | 298 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
299 | struct acpi_video_device *video = acpi_driver_data(device); |
300 | int level; | |
301 | ||
302 | if ( state >= video->brightness->count - 2) | |
303 | return -EINVAL; | |
304 | ||
305 | state = video->brightness->count - state; | |
306 | level = video->brightness->levels[state -1]; | |
307 | return acpi_video_device_lcd_set_level(video, level); | |
308 | } | |
309 | ||
9c8b04be | 310 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
311 | .get_max_state = video_get_max_state, |
312 | .get_cur_state = video_get_cur_state, | |
313 | .set_cur_state = video_set_cur_state, | |
314 | }; | |
315 | ||
1da177e4 LT |
316 | /* -------------------------------------------------------------------------- |
317 | Video Management | |
318 | -------------------------------------------------------------------------- */ | |
319 | ||
1da177e4 | 320 | static int |
4be44fcd LB |
321 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
322 | union acpi_object **levels) | |
1da177e4 | 323 | { |
4be44fcd LB |
324 | int status; |
325 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
326 | union acpi_object *obj; | |
1da177e4 | 327 | |
1da177e4 LT |
328 | |
329 | *levels = NULL; | |
330 | ||
90130268 | 331 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 332 | if (!ACPI_SUCCESS(status)) |
d550d98d | 333 | return status; |
4be44fcd | 334 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 335 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 336 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
337 | status = -EFAULT; |
338 | goto err; | |
339 | } | |
340 | ||
341 | *levels = obj; | |
342 | ||
d550d98d | 343 | return 0; |
1da177e4 | 344 | |
4be44fcd | 345 | err: |
6044ec88 | 346 | kfree(buffer.pointer); |
1da177e4 | 347 | |
d550d98d | 348 | return status; |
1da177e4 LT |
349 | } |
350 | ||
351 | static int | |
4be44fcd | 352 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 353 | { |
24450c7a | 354 | int status; |
4be44fcd LB |
355 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
356 | struct acpi_object_list args = { 1, &arg0 }; | |
9e6dada9 | 357 | int state; |
1da177e4 | 358 | |
1da177e4 | 359 | arg0.integer.value = level; |
1da177e4 | 360 | |
24450c7a ZR |
361 | status = acpi_evaluate_object(device->dev->handle, "_BCM", |
362 | &args, NULL); | |
363 | if (ACPI_FAILURE(status)) { | |
364 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
365 | return -EIO; | |
366 | } | |
367 | ||
4500ca8e | 368 | device->brightness->curr = level; |
9e6dada9 | 369 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 370 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
371 | if (device->backlight) |
372 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
373 | return 0; |
374 | } | |
9e6dada9 | 375 | |
24450c7a ZR |
376 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
377 | return -EINVAL; | |
1da177e4 LT |
378 | } |
379 | ||
45cb50e6 ZR |
380 | /* |
381 | * For some buggy _BQC methods, we need to add a constant value to | |
382 | * the _BQC return value to get the actual current brightness level | |
383 | */ | |
384 | ||
385 | static int bqc_offset_aml_bug_workaround; | |
386 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
387 | { | |
388 | bqc_offset_aml_bug_workaround = 9; | |
389 | return 0; | |
390 | } | |
391 | ||
129ff8f8 ZR |
392 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
393 | { | |
394 | use_bios_initial_backlight = 0; | |
395 | return 0; | |
396 | } | |
397 | ||
45cb50e6 ZR |
398 | static struct dmi_system_id video_dmi_table[] __initdata = { |
399 | /* | |
400 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
401 | */ | |
402 | { | |
403 | .callback = video_set_bqc_offset, | |
404 | .ident = "Acer Aspire 5720", | |
405 | .matches = { | |
406 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
407 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
408 | }, | |
409 | }, | |
5afc4abe LB |
410 | { |
411 | .callback = video_set_bqc_offset, | |
412 | .ident = "Acer Aspire 5710Z", | |
413 | .matches = { | |
414 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
415 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
416 | }, | |
417 | }, | |
34ac272b ZR |
418 | { |
419 | .callback = video_set_bqc_offset, | |
420 | .ident = "eMachines E510", | |
421 | .matches = { | |
422 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
423 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
424 | }, | |
425 | }, | |
93bcece2 ZR |
426 | { |
427 | .callback = video_set_bqc_offset, | |
428 | .ident = "Acer Aspire 5315", | |
429 | .matches = { | |
430 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
431 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
432 | }, | |
433 | }, | |
152a4e63 ZR |
434 | { |
435 | .callback = video_set_bqc_offset, | |
436 | .ident = "Acer Aspire 7720", | |
437 | .matches = { | |
438 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
439 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
440 | }, | |
441 | }, | |
129ff8f8 ZR |
442 | { |
443 | .callback = video_ignore_initial_backlight, | |
444 | .ident = "HP Folio 13-2000", | |
445 | .matches = { | |
446 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
447 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
448 | }, | |
449 | }, | |
771d09b3 GMDV |
450 | { |
451 | .callback = video_ignore_initial_backlight, | |
452 | .ident = "HP Pavilion dm4", | |
453 | .matches = { | |
454 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
455 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
456 | }, | |
457 | }, | |
45cb50e6 ZR |
458 | {} |
459 | }; | |
460 | ||
994fa63c DB |
461 | static unsigned long long |
462 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
463 | unsigned long long bqc_value) | |
464 | { | |
465 | unsigned long long level; | |
466 | ||
467 | if (device->brightness->flags._BQC_use_index) { | |
468 | /* | |
469 | * _BQC returns an index that doesn't account for | |
470 | * the first 2 items with special meaning, so we need | |
471 | * to compensate for that by offsetting ourselves | |
472 | */ | |
473 | if (device->brightness->flags._BCL_reversed) | |
474 | bqc_value = device->brightness->count - 3 - bqc_value; | |
475 | ||
476 | level = device->brightness->levels[bqc_value + 2]; | |
477 | } else { | |
478 | level = bqc_value; | |
479 | } | |
480 | ||
481 | level += bqc_offset_aml_bug_workaround; | |
482 | ||
483 | return level; | |
484 | } | |
485 | ||
1da177e4 | 486 | static int |
4be44fcd | 487 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 488 | unsigned long long *level, bool raw) |
1da177e4 | 489 | { |
c8890f90 | 490 | acpi_status status = AE_OK; |
4e231fa4 | 491 | int i; |
c8890f90 | 492 | |
c60d638e ZR |
493 | if (device->cap._BQC || device->cap._BCQ) { |
494 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
495 | ||
496 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
497 | NULL, level); |
498 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
499 | if (raw) { |
500 | /* | |
501 | * Caller has indicated he wants the raw | |
502 | * value returned by _BQC, so don't furtherly | |
503 | * mess with the value. | |
504 | */ | |
505 | return 0; | |
506 | } | |
507 | ||
994fa63c | 508 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 509 | |
4e231fa4 VS |
510 | for (i = 2; i < device->brightness->count; i++) |
511 | if (device->brightness->levels[i] == *level) { | |
512 | device->brightness->curr = *level; | |
513 | return 0; | |
514 | } | |
a89803df DB |
515 | /* |
516 | * BQC returned an invalid level. | |
517 | * Stop using it. | |
518 | */ | |
519 | ACPI_WARNING((AE_INFO, | |
520 | "%s returned an invalid level", | |
521 | buf)); | |
522 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
523 | } else { |
524 | /* Fixme: | |
525 | * should we return an error or ignore this failure? | |
526 | * dev->brightness->curr is a cached value which stores | |
527 | * the correct current backlight level in most cases. | |
528 | * ACPI video backlight still works w/ buggy _BQC. | |
529 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
530 | */ | |
c60d638e ZR |
531 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
532 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
533 | } |
534 | } | |
535 | ||
4500ca8e | 536 | *level = device->brightness->curr; |
c8890f90 | 537 | return 0; |
1da177e4 LT |
538 | } |
539 | ||
540 | static int | |
4be44fcd LB |
541 | acpi_video_device_EDID(struct acpi_video_device *device, |
542 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 543 | { |
4be44fcd LB |
544 | int status; |
545 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
546 | union acpi_object *obj; | |
547 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
548 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 549 | |
1da177e4 LT |
550 | |
551 | *edid = NULL; | |
552 | ||
553 | if (!device) | |
d550d98d | 554 | return -ENODEV; |
1da177e4 LT |
555 | if (length == 128) |
556 | arg0.integer.value = 1; | |
557 | else if (length == 256) | |
558 | arg0.integer.value = 2; | |
559 | else | |
d550d98d | 560 | return -EINVAL; |
1da177e4 | 561 | |
90130268 | 562 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 563 | if (ACPI_FAILURE(status)) |
d550d98d | 564 | return -ENODEV; |
1da177e4 | 565 | |
50dd0969 | 566 | obj = buffer.pointer; |
1da177e4 LT |
567 | |
568 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
569 | *edid = obj; | |
570 | else { | |
6468463a | 571 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
572 | status = -EFAULT; |
573 | kfree(obj); | |
574 | } | |
575 | ||
d550d98d | 576 | return status; |
1da177e4 LT |
577 | } |
578 | ||
1da177e4 LT |
579 | /* bus */ |
580 | ||
1da177e4 LT |
581 | /* |
582 | * Arg: | |
583 | * video : video bus device pointer | |
584 | * bios_flag : | |
585 | * 0. The system BIOS should NOT automatically switch(toggle) | |
586 | * the active display output. | |
587 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 588 | * active display output. No switch event. |
1da177e4 LT |
589 | * 2. The _DGS value should be locked. |
590 | * 3. The system BIOS should not automatically switch (toggle) the | |
591 | * active display output, but instead generate the display switch | |
592 | * event notify code. | |
593 | * lcd_flag : | |
594 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 595 | * of the LCD when the power changes from AC to DC |
1da177e4 | 596 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 597 | * level of the LCD when the power changes from AC to DC. |
1da177e4 | 598 | * Return Value: |
ea9f8856 | 599 | * -EINVAL wrong arg. |
1da177e4 LT |
600 | */ |
601 | ||
602 | static int | |
4be44fcd | 603 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 604 | { |
ea9f8856 | 605 | acpi_status status; |
4be44fcd LB |
606 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
607 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 608 | |
b0373843 ZR |
609 | if (!video->cap._DOS) |
610 | return 0; | |
1da177e4 | 611 | |
ea9f8856 IM |
612 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
613 | return -EINVAL; | |
1da177e4 LT |
614 | arg0.integer.value = (lcd_flag << 2) | bios_flag; |
615 | video->dos_setting = arg0.integer.value; | |
ea9f8856 IM |
616 | status = acpi_evaluate_object(video->device->handle, "_DOS", |
617 | &args, NULL); | |
618 | if (ACPI_FAILURE(status)) | |
619 | return -EIO; | |
1da177e4 | 620 | |
ea9f8856 | 621 | return 0; |
1da177e4 LT |
622 | } |
623 | ||
935e5f29 ZR |
624 | /* |
625 | * Simple comparison function used to sort backlight levels. | |
626 | */ | |
627 | ||
628 | static int | |
629 | acpi_video_cmp_level(const void *a, const void *b) | |
630 | { | |
631 | return *(int *)a - *(int *)b; | |
632 | } | |
633 | ||
a50188da AL |
634 | /* |
635 | * Decides if _BQC/_BCQ for this system is usable | |
636 | * | |
637 | * We do this by changing the level first and then read out the current | |
638 | * brightness level, if the value does not match, find out if it is using | |
639 | * index. If not, clear the _BQC/_BCQ capability. | |
640 | */ | |
641 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
642 | int max_level, int current_level) | |
643 | { | |
644 | struct acpi_video_device_brightness *br = device->brightness; | |
645 | int result; | |
646 | unsigned long long level; | |
647 | int test_level; | |
648 | ||
649 | /* don't mess with existing known broken systems */ | |
650 | if (bqc_offset_aml_bug_workaround) | |
651 | return 0; | |
652 | ||
653 | /* | |
654 | * Some systems always report current brightness level as maximum | |
655 | * through _BQC, we need to test another value for them. | |
656 | */ | |
657 | test_level = current_level == max_level ? br->levels[2] : max_level; | |
658 | ||
659 | result = acpi_video_device_lcd_set_level(device, test_level); | |
660 | if (result) | |
661 | return result; | |
662 | ||
663 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
664 | if (result) | |
665 | return result; | |
666 | ||
667 | if (level != test_level) { | |
668 | /* buggy _BQC found, need to find out if it uses index */ | |
669 | if (level < br->count) { | |
670 | if (br->flags._BCL_reversed) | |
671 | level = br->count - 3 - level; | |
672 | if (br->levels[level + 2] == test_level) | |
673 | br->flags._BQC_use_index = 1; | |
674 | } | |
675 | ||
676 | if (!br->flags._BQC_use_index) | |
677 | device->cap._BQC = device->cap._BCQ = 0; | |
678 | } | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | ||
1da177e4 LT |
684 | /* |
685 | * Arg: | |
686 | * device : video output device (LCD, CRT, ..) | |
687 | * | |
688 | * Return Value: | |
469778c1 JJ |
689 | * Maximum brightness level |
690 | * | |
691 | * Allocate and initialize device->brightness. | |
692 | */ | |
693 | ||
694 | static int | |
695 | acpi_video_init_brightness(struct acpi_video_device *device) | |
696 | { | |
697 | union acpi_object *obj = NULL; | |
d32f6947 | 698 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 699 | unsigned long long level, level_old; |
469778c1 JJ |
700 | union acpi_object *o; |
701 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 702 | int result = -EINVAL; |
469778c1 JJ |
703 | |
704 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
705 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
706 | "LCD brightness level\n")); | |
707 | goto out; | |
708 | } | |
709 | ||
710 | if (obj->package.count < 2) | |
711 | goto out; | |
712 | ||
713 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
714 | if (!br) { | |
715 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 716 | result = -ENOMEM; |
469778c1 JJ |
717 | goto out; |
718 | } | |
719 | ||
d32f6947 | 720 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 721 | GFP_KERNEL); |
1a7c618a ZR |
722 | if (!br->levels) { |
723 | result = -ENOMEM; | |
469778c1 | 724 | goto out_free; |
1a7c618a | 725 | } |
469778c1 JJ |
726 | |
727 | for (i = 0; i < obj->package.count; i++) { | |
728 | o = (union acpi_object *)&obj->package.elements[i]; | |
729 | if (o->type != ACPI_TYPE_INTEGER) { | |
730 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
731 | continue; | |
732 | } | |
733 | br->levels[count] = (u32) o->integer.value; | |
734 | ||
735 | if (br->levels[count] > max_level) | |
736 | max_level = br->levels[count]; | |
737 | count++; | |
738 | } | |
739 | ||
d32f6947 ZR |
740 | /* |
741 | * some buggy BIOS don't export the levels | |
742 | * when machine is on AC/Battery in _BCL package. | |
743 | * In this case, the first two elements in _BCL packages | |
744 | * are also supported brightness levels that OS should take care of. | |
745 | */ | |
90af2cf6 ZR |
746 | for (i = 2; i < count; i++) { |
747 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 748 | level_ac_battery++; |
90af2cf6 ZR |
749 | if (br->levels[i] == br->levels[1]) |
750 | level_ac_battery++; | |
751 | } | |
d32f6947 ZR |
752 | |
753 | if (level_ac_battery < 2) { | |
754 | level_ac_battery = 2 - level_ac_battery; | |
755 | br->flags._BCL_no_ac_battery_levels = 1; | |
756 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
757 | br->levels[i] = br->levels[i - level_ac_battery]; | |
758 | count += level_ac_battery; | |
759 | } else if (level_ac_battery > 2) | |
bf6787eb | 760 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 761 | |
d80fb99f ZR |
762 | /* Check if the _BCL package is in a reversed order */ |
763 | if (max_level == br->levels[2]) { | |
764 | br->flags._BCL_reversed = 1; | |
765 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
766 | acpi_video_cmp_level, NULL); | |
767 | } else if (max_level != br->levels[count - 1]) | |
768 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 769 | "Found unordered _BCL package")); |
469778c1 JJ |
770 | |
771 | br->count = count; | |
772 | device->brightness = br; | |
1a7c618a ZR |
773 | |
774 | /* Check the input/output of _BQC/_BCL/_BCM */ | |
775 | if ((max_level < 100) && (max_level <= (count - 2))) | |
776 | br->flags._BCL_use_index = 1; | |
777 | ||
778 | /* | |
779 | * _BCM is always consistent with _BCL, | |
780 | * at least for all the laptops we have ever seen. | |
781 | */ | |
782 | br->flags._BCM_use_index = br->flags._BCL_use_index; | |
783 | ||
784 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ | |
90c53ca4 | 785 | br->curr = level = max_level; |
e047cca6 ZR |
786 | |
787 | if (!device->cap._BQC) | |
788 | goto set_level; | |
789 | ||
a89803df DB |
790 | result = acpi_video_device_lcd_get_level_current(device, |
791 | &level_old, true); | |
1a7c618a ZR |
792 | if (result) |
793 | goto out_free_levels; | |
794 | ||
a50188da | 795 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
796 | if (result) |
797 | goto out_free_levels; | |
a50188da AL |
798 | /* |
799 | * cap._BQC may get cleared due to _BQC is found to be broken | |
800 | * in acpi_video_bqc_quirk, so check again here. | |
801 | */ | |
802 | if (!device->cap._BQC) | |
803 | goto set_level; | |
e047cca6 | 804 | |
994fa63c DB |
805 | if (use_bios_initial_backlight) { |
806 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 807 | /* |
994fa63c DB |
808 | * On some buggy laptops, _BQC returns an uninitialized |
809 | * value when invoked for the first time, i.e. | |
810 | * level_old is invalid (no matter whether it's a level | |
811 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 812 | */ |
994fa63c DB |
813 | for (i = 2; i < br->count; i++) |
814 | if (level_old == br->levels[i]) | |
815 | break; | |
816 | if (i == br->count) | |
817 | level = max_level; | |
90c53ca4 | 818 | } |
e047cca6 | 819 | |
e047cca6 | 820 | set_level: |
90c53ca4 | 821 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
822 | if (result) |
823 | goto out_free_levels; | |
1a7c618a | 824 | |
d32f6947 ZR |
825 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
826 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 827 | kfree(obj); |
1a7c618a | 828 | return result; |
469778c1 JJ |
829 | |
830 | out_free_levels: | |
831 | kfree(br->levels); | |
832 | out_free: | |
833 | kfree(br); | |
834 | out: | |
835 | device->brightness = NULL; | |
836 | kfree(obj); | |
1a7c618a | 837 | return result; |
469778c1 JJ |
838 | } |
839 | ||
840 | /* | |
841 | * Arg: | |
842 | * device : video output device (LCD, CRT, ..) | |
843 | * | |
844 | * Return Value: | |
1da177e4 LT |
845 | * None |
846 | * | |
98fb8fe1 | 847 | * Find out all required AML methods defined under the output |
1da177e4 LT |
848 | * device. |
849 | */ | |
850 | ||
4be44fcd | 851 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 852 | { |
1da177e4 | 853 | acpi_handle h_dummy1; |
1da177e4 | 854 | |
90130268 | 855 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_ADR", &h_dummy1))) { |
1da177e4 LT |
856 | device->cap._ADR = 1; |
857 | } | |
90130268 | 858 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCL", &h_dummy1))) { |
4be44fcd | 859 | device->cap._BCL = 1; |
1da177e4 | 860 | } |
90130268 | 861 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCM", &h_dummy1))) { |
4be44fcd | 862 | device->cap._BCM = 1; |
1da177e4 | 863 | } |
2f3d000a YL |
864 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle,"_BQC",&h_dummy1))) |
865 | device->cap._BQC = 1; | |
c60d638e ZR |
866 | else if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_BCQ", |
867 | &h_dummy1))) { | |
868 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); | |
869 | device->cap._BCQ = 1; | |
870 | } | |
871 | ||
90130268 | 872 | if (ACPI_SUCCESS(acpi_get_handle(device->dev->handle, "_DDC", &h_dummy1))) { |
4be44fcd | 873 | device->cap._DDC = 1; |
1da177e4 | 874 | } |
1da177e4 | 875 | |
1a7c618a | 876 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 877 | struct backlight_properties props; |
9661e92c MG |
878 | struct pci_dev *pdev; |
879 | acpi_handle acpi_parent; | |
880 | struct device *parent = NULL; | |
702ed512 | 881 | int result; |
2f3d000a YL |
882 | static int count = 0; |
883 | char *name; | |
1a7c618a ZR |
884 | |
885 | result = acpi_video_init_brightness(device); | |
886 | if (result) | |
887 | return; | |
aeb834d9 | 888 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
889 | if (!name) |
890 | return; | |
aeb834d9 | 891 | count++; |
2f3d000a | 892 | |
9661e92c MG |
893 | acpi_get_parent(device->dev->handle, &acpi_parent); |
894 | ||
895 | pdev = acpi_get_pci_dev(acpi_parent); | |
896 | if (pdev) { | |
897 | parent = &pdev->dev; | |
898 | pci_dev_put(pdev); | |
899 | } | |
900 | ||
a19a6ee6 | 901 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 902 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 903 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
904 | device->backlight = backlight_device_register(name, |
905 | parent, | |
906 | device, | |
a19a6ee6 MG |
907 | &acpi_backlight_ops, |
908 | &props); | |
2f3d000a | 909 | kfree(name); |
e01ce79b ZR |
910 | if (IS_ERR(device->backlight)) |
911 | return; | |
702ed512 | 912 | |
ac7729da RW |
913 | /* |
914 | * Save current brightness level in case we have to restore it | |
915 | * before acpi_video_device_lcd_set_level() is called next time. | |
916 | */ | |
917 | device->backlight->props.brightness = | |
918 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 919 | |
4a703a8f | 920 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 921 | device->dev, &video_cooling_ops); |
4a703a8f | 922 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 923 | /* |
4a703a8f | 924 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
925 | * free it. |
926 | * Also, why the hell we are returning early and | |
927 | * not attempt to register video output if cooling | |
928 | * device registration failed? | |
929 | * -- dtor | |
930 | */ | |
4a703a8f | 931 | device->cooling_dev = NULL; |
43ff39f2 | 932 | return; |
4b4fe3b6 | 933 | } |
43ff39f2 | 934 | |
fc3a8828 | 935 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 936 | device->cooling_dev->id); |
9030062f | 937 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 938 | &device->cooling_dev->device.kobj, |
9030062f JL |
939 | "thermal_cooling"); |
940 | if (result) | |
941 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 942 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
943 | &device->dev->dev.kobj, "device"); |
944 | if (result) | |
945 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
946 | ||
2f3d000a | 947 | } |
1da177e4 LT |
948 | } |
949 | ||
950 | /* | |
951 | * Arg: | |
952 | * device : video output device (VGA) | |
953 | * | |
954 | * Return Value: | |
955 | * None | |
956 | * | |
98fb8fe1 | 957 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
958 | */ |
959 | ||
4be44fcd | 960 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 961 | { |
4be44fcd | 962 | acpi_handle h_dummy1; |
1da177e4 | 963 | |
90130268 | 964 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOS", &h_dummy1))) { |
1da177e4 LT |
965 | video->cap._DOS = 1; |
966 | } | |
90130268 | 967 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_DOD", &h_dummy1))) { |
1da177e4 LT |
968 | video->cap._DOD = 1; |
969 | } | |
90130268 | 970 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_ROM", &h_dummy1))) { |
1da177e4 LT |
971 | video->cap._ROM = 1; |
972 | } | |
90130268 | 973 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_GPD", &h_dummy1))) { |
1da177e4 LT |
974 | video->cap._GPD = 1; |
975 | } | |
90130268 | 976 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_SPD", &h_dummy1))) { |
1da177e4 LT |
977 | video->cap._SPD = 1; |
978 | } | |
90130268 | 979 | if (ACPI_SUCCESS(acpi_get_handle(video->device->handle, "_VPO", &h_dummy1))) { |
1da177e4 LT |
980 | video->cap._VPO = 1; |
981 | } | |
982 | } | |
983 | ||
984 | /* | |
985 | * Check whether the video bus device has required AML method to | |
986 | * support the desired features | |
987 | */ | |
988 | ||
4be44fcd | 989 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 990 | { |
4be44fcd | 991 | acpi_status status = -ENOENT; |
1e4cffe7 | 992 | struct pci_dev *dev; |
1da177e4 LT |
993 | |
994 | if (!video) | |
d550d98d | 995 | return -EINVAL; |
1da177e4 | 996 | |
1e4cffe7 | 997 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
998 | if (!dev) |
999 | return -ENODEV; | |
1e4cffe7 | 1000 | pci_dev_put(dev); |
22c13f9d | 1001 | |
1da177e4 LT |
1002 | /* Since there is no HID, CID and so on for VGA driver, we have |
1003 | * to check well known required nodes. | |
1004 | */ | |
1005 | ||
98fb8fe1 | 1006 | /* Does this device support video switching? */ |
3a1151e3 SB |
1007 | if (video->cap._DOS || video->cap._DOD) { |
1008 | if (!video->cap._DOS) { | |
1009 | printk(KERN_WARNING FW_BUG | |
1010 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1011 | acpi_device_bid(video->device)); | |
1012 | } | |
1da177e4 LT |
1013 | video->flags.multihead = 1; |
1014 | status = 0; | |
1015 | } | |
1016 | ||
98fb8fe1 | 1017 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1018 | if (video->cap._ROM) { |
1da177e4 LT |
1019 | video->flags.rom = 1; |
1020 | status = 0; | |
1021 | } | |
1022 | ||
98fb8fe1 | 1023 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1024 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1025 | video->flags.post = 1; |
1026 | status = 0; | |
1027 | } | |
1028 | ||
d550d98d | 1029 | return status; |
1da177e4 LT |
1030 | } |
1031 | ||
1da177e4 LT |
1032 | /* -------------------------------------------------------------------------- |
1033 | Driver Interface | |
1034 | -------------------------------------------------------------------------- */ | |
1035 | ||
1036 | /* device interface */ | |
82cae999 RZ |
1037 | static struct acpi_video_device_attrib* |
1038 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) | |
1039 | { | |
78eed028 DT |
1040 | struct acpi_video_enumerated_device *ids; |
1041 | int i; | |
1042 | ||
1043 | for (i = 0; i < video->attached_count; i++) { | |
1044 | ids = &video->attached_array[i]; | |
1045 | if ((ids->value.int_val & 0xffff) == device_id) | |
1046 | return &ids->value.attrib; | |
1047 | } | |
82cae999 | 1048 | |
82cae999 RZ |
1049 | return NULL; |
1050 | } | |
1da177e4 | 1051 | |
e92a7162 MG |
1052 | static int |
1053 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1054 | unsigned long device_id) | |
1055 | { | |
1056 | struct acpi_video_enumerated_device *ids; | |
1057 | int i; | |
1058 | ||
1059 | for (i = 0; i < video->attached_count; i++) { | |
1060 | ids = &video->attached_array[i]; | |
1061 | if ((ids->value.int_val & 0xffff) == device_id) | |
1062 | return ids->value.int_val; | |
1063 | } | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1da177e4 | 1068 | static int |
4be44fcd LB |
1069 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1070 | struct acpi_video_bus *video) | |
1da177e4 | 1071 | { |
27663c58 | 1072 | unsigned long long device_id; |
e92a7162 | 1073 | int status, device_type; |
4be44fcd | 1074 | struct acpi_video_device *data; |
82cae999 | 1075 | struct acpi_video_device_attrib* attribute; |
1da177e4 LT |
1076 | |
1077 | if (!device || !video) | |
d550d98d | 1078 | return -EINVAL; |
1da177e4 | 1079 | |
4be44fcd LB |
1080 | status = |
1081 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
1da177e4 LT |
1082 | if (ACPI_SUCCESS(status)) { |
1083 | ||
36bcbec7 | 1084 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1da177e4 | 1085 | if (!data) |
d550d98d | 1086 | return -ENOMEM; |
1da177e4 | 1087 | |
1da177e4 LT |
1088 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1089 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1090 | device->driver_data = data; |
1da177e4 LT |
1091 | |
1092 | data->device_id = device_id; | |
1093 | data->video = video; | |
1094 | data->dev = device; | |
1095 | ||
82cae999 RZ |
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; | |
e92a7162 MG |
1118 | } else { |
1119 | /* Check for legacy IDs */ | |
1120 | device_type = acpi_video_get_device_type(video, | |
1121 | device_id); | |
1122 | /* Ignore bits 16 and 18-20 */ | |
1123 | switch (device_type & 0xffe2ffff) { | |
1124 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: | |
1125 | data->flags.crt = 1; | |
1126 | break; | |
1127 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1128 | data->flags.lcd = 1; | |
1129 | break; | |
1130 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1131 | data->flags.tvout = 1; | |
1132 | break; | |
1133 | default: | |
1134 | data->flags.unknown = 1; | |
1135 | } | |
1136 | } | |
4be44fcd | 1137 | |
1da177e4 LT |
1138 | acpi_video_device_bind(video, data); |
1139 | acpi_video_device_find_cap(data); | |
1140 | ||
90130268 | 1141 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1142 | ACPI_DEVICE_NOTIFY, |
1143 | acpi_video_device_notify, | |
1144 | data); | |
1da177e4 | 1145 | if (ACPI_FAILURE(status)) { |
55ac9a01 LM |
1146 | printk(KERN_ERR PREFIX |
1147 | "Error installing notify handler\n"); | |
973bf491 YL |
1148 | if(data->brightness) |
1149 | kfree(data->brightness->levels); | |
1150 | kfree(data->brightness); | |
1151 | kfree(data); | |
1152 | return -ENODEV; | |
1da177e4 LT |
1153 | } |
1154 | ||
bbac81f5 | 1155 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1156 | list_add_tail(&data->entry, &video->video_device_list); |
bbac81f5 | 1157 | mutex_unlock(&video->device_list_lock); |
1da177e4 | 1158 | |
d550d98d | 1159 | return 0; |
1da177e4 LT |
1160 | } |
1161 | ||
d550d98d | 1162 | return -ENOENT; |
1da177e4 LT |
1163 | } |
1164 | ||
1165 | /* | |
1166 | * Arg: | |
1167 | * video : video bus device | |
1168 | * | |
1169 | * Return: | |
1170 | * none | |
1171 | * | |
1172 | * Enumerate the video device list of the video bus, | |
1173 | * bind the ids with the corresponding video devices | |
1174 | * under the video bus. | |
4be44fcd | 1175 | */ |
1da177e4 | 1176 | |
4be44fcd | 1177 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1178 | { |
ff102ea9 DT |
1179 | struct acpi_video_device *dev; |
1180 | ||
bbac81f5 | 1181 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1182 | |
1183 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1184 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1185 | |
bbac81f5 | 1186 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1187 | } |
1188 | ||
1189 | /* | |
1190 | * Arg: | |
1191 | * video : video bus device | |
1192 | * device : video output device under the video | |
1193 | * bus | |
1194 | * | |
1195 | * Return: | |
1196 | * none | |
1197 | * | |
1198 | * Bind the ids with the corresponding video devices | |
1199 | * under the video bus. | |
4be44fcd | 1200 | */ |
1da177e4 LT |
1201 | |
1202 | static void | |
4be44fcd LB |
1203 | acpi_video_device_bind(struct acpi_video_bus *video, |
1204 | struct acpi_video_device *device) | |
1da177e4 | 1205 | { |
78eed028 | 1206 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1207 | int i; |
1da177e4 | 1208 | |
78eed028 DT |
1209 | for (i = 0; i < video->attached_count; i++) { |
1210 | ids = &video->attached_array[i]; | |
1211 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1212 | ids->bind_info = device; | |
1da177e4 LT |
1213 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1214 | } | |
1215 | } | |
1da177e4 LT |
1216 | } |
1217 | ||
1218 | /* | |
1219 | * Arg: | |
1220 | * video : video bus device | |
1221 | * | |
1222 | * Return: | |
1223 | * < 0 : error | |
1224 | * | |
1225 | * Call _DOD to enumerate all devices attached to display adapter | |
1226 | * | |
4be44fcd | 1227 | */ |
1da177e4 LT |
1228 | |
1229 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1230 | { | |
4be44fcd LB |
1231 | int status; |
1232 | int count; | |
1233 | int i; | |
78eed028 | 1234 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1235 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1236 | union acpi_object *dod = NULL; | |
1237 | union acpi_object *obj; | |
1da177e4 | 1238 | |
90130268 | 1239 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1240 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1241 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1242 | return status; |
1da177e4 LT |
1243 | } |
1244 | ||
50dd0969 | 1245 | dod = buffer.pointer; |
1da177e4 | 1246 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1247 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1248 | status = -EFAULT; |
1249 | goto out; | |
1250 | } | |
1251 | ||
1252 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1253 | dod->package.count)); |
1da177e4 | 1254 | |
78eed028 DT |
1255 | active_list = kcalloc(1 + dod->package.count, |
1256 | sizeof(struct acpi_video_enumerated_device), | |
1257 | GFP_KERNEL); | |
1258 | if (!active_list) { | |
1da177e4 LT |
1259 | status = -ENOMEM; |
1260 | goto out; | |
1261 | } | |
1262 | ||
1263 | count = 0; | |
1264 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1265 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1266 | |
1267 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1268 | printk(KERN_ERR PREFIX |
1269 | "Invalid _DOD data in element %d\n", i); | |
1270 | continue; | |
1da177e4 | 1271 | } |
78eed028 DT |
1272 | |
1273 | active_list[count].value.int_val = obj->integer.value; | |
1274 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1275 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1276 | (int)obj->integer.value)); | |
1da177e4 LT |
1277 | count++; |
1278 | } | |
1da177e4 | 1279 | |
6044ec88 | 1280 | kfree(video->attached_array); |
4be44fcd | 1281 | |
78eed028 | 1282 | video->attached_array = active_list; |
1da177e4 | 1283 | video->attached_count = count; |
78eed028 DT |
1284 | |
1285 | out: | |
02438d87 | 1286 | kfree(buffer.pointer); |
d550d98d | 1287 | return status; |
1da177e4 LT |
1288 | } |
1289 | ||
4be44fcd LB |
1290 | static int |
1291 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1292 | u32 level_current, u32 event) | |
1da177e4 | 1293 | { |
63f0edfc | 1294 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1295 | max = max_below = 0; |
1296 | min = min_above = 255; | |
63f0edfc | 1297 | /* Find closest level to level_current */ |
0a3db1ce | 1298 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1299 | l = device->brightness->levels[i]; |
1300 | if (abs(l - level_current) < abs(delta)) { | |
1301 | delta = l - level_current; | |
1302 | if (!delta) | |
1303 | break; | |
1304 | } | |
1305 | } | |
1306 | /* Ajust level_current to closest available level */ | |
1307 | level_current += delta; | |
0a3db1ce | 1308 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1309 | l = device->brightness->levels[i]; |
1310 | if (l < min) | |
1311 | min = l; | |
1312 | if (l > max) | |
1313 | max = l; | |
1314 | if (l < min_above && l > level_current) | |
1315 | min_above = l; | |
1316 | if (l > max_below && l < level_current) | |
1317 | max_below = l; | |
1318 | } | |
1319 | ||
1320 | switch (event) { | |
1321 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1322 | return (level_current < max) ? min_above : min; | |
1323 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1324 | return (level_current < max) ? min_above : max; | |
1325 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1326 | return (level_current > min) ? max_below : min; | |
1327 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1328 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1329 | return 0; | |
1330 | default: | |
1331 | return level_current; | |
1332 | } | |
1da177e4 LT |
1333 | } |
1334 | ||
c8890f90 | 1335 | static int |
4be44fcd | 1336 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1337 | { |
27663c58 | 1338 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1339 | int result = -EINVAL; |
1340 | ||
28c32e99 ZR |
1341 | /* no warning message if acpi_backlight=vendor is used */ |
1342 | if (!acpi_video_backlight_support()) | |
1343 | return 0; | |
1344 | ||
469778c1 | 1345 | if (!device->brightness) |
c8890f90 ZR |
1346 | goto out; |
1347 | ||
1348 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1349 | &level_current, |
1350 | false); | |
c8890f90 ZR |
1351 | if (result) |
1352 | goto out; | |
1353 | ||
1da177e4 | 1354 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1355 | |
24450c7a | 1356 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1357 | |
36342742 MG |
1358 | if (!result) |
1359 | backlight_force_update(device->backlight, | |
1360 | BACKLIGHT_UPDATE_HOTKEY); | |
1361 | ||
c8890f90 ZR |
1362 | out: |
1363 | if (result) | |
1364 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1365 | ||
1366 | return result; | |
1da177e4 LT |
1367 | } |
1368 | ||
e92a7162 MG |
1369 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1370 | void **edid) | |
1371 | { | |
1372 | struct acpi_video_bus *video; | |
1373 | struct acpi_video_device *video_device; | |
1374 | union acpi_object *buffer = NULL; | |
1375 | acpi_status status; | |
1376 | int i, length; | |
1377 | ||
1378 | if (!device || !acpi_driver_data(device)) | |
1379 | return -EINVAL; | |
1380 | ||
1381 | video = acpi_driver_data(device); | |
1382 | ||
1383 | for (i = 0; i < video->attached_count; i++) { | |
1384 | video_device = video->attached_array[i].bind_info; | |
1385 | length = 256; | |
1386 | ||
1387 | if (!video_device) | |
1388 | continue; | |
1389 | ||
82069552 ZR |
1390 | if (!video_device->cap._DDC) |
1391 | continue; | |
1392 | ||
e92a7162 MG |
1393 | if (type) { |
1394 | switch (type) { | |
1395 | case ACPI_VIDEO_DISPLAY_CRT: | |
1396 | if (!video_device->flags.crt) | |
1397 | continue; | |
1398 | break; | |
1399 | case ACPI_VIDEO_DISPLAY_TV: | |
1400 | if (!video_device->flags.tvout) | |
1401 | continue; | |
1402 | break; | |
1403 | case ACPI_VIDEO_DISPLAY_DVI: | |
1404 | if (!video_device->flags.dvi) | |
1405 | continue; | |
1406 | break; | |
1407 | case ACPI_VIDEO_DISPLAY_LCD: | |
1408 | if (!video_device->flags.lcd) | |
1409 | continue; | |
1410 | break; | |
1411 | } | |
1412 | } else if (video_device->device_id != device_id) { | |
1413 | continue; | |
1414 | } | |
1415 | ||
1416 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1417 | ||
1418 | if (ACPI_FAILURE(status) || !buffer || | |
1419 | buffer->type != ACPI_TYPE_BUFFER) { | |
1420 | length = 128; | |
1421 | status = acpi_video_device_EDID(video_device, &buffer, | |
1422 | length); | |
1423 | if (ACPI_FAILURE(status) || !buffer || | |
1424 | buffer->type != ACPI_TYPE_BUFFER) { | |
1425 | continue; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | *edid = buffer->buffer.pointer; | |
1430 | return length; | |
1431 | } | |
1432 | ||
1433 | return -ENODEV; | |
1434 | } | |
1435 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1436 | ||
1da177e4 | 1437 | static int |
4be44fcd LB |
1438 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1439 | struct acpi_device *device) | |
1da177e4 | 1440 | { |
fba4e087 | 1441 | int status = 0; |
ff102ea9 | 1442 | struct acpi_device *dev; |
1da177e4 | 1443 | |
fba4e087 IM |
1444 | /* |
1445 | * There are systems where video module known to work fine regardless | |
1446 | * of broken _DOD and ignoring returned value here doesn't cause | |
1447 | * any issues later. | |
1448 | */ | |
1449 | acpi_video_device_enumerate(video); | |
1da177e4 | 1450 | |
ff102ea9 | 1451 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1452 | |
1453 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1454 | if (status) { |
55ac9a01 | 1455 | printk(KERN_WARNING PREFIX |
25985edc | 1456 | "Can't attach device\n"); |
1da177e4 LT |
1457 | continue; |
1458 | } | |
1da177e4 | 1459 | } |
d550d98d | 1460 | return status; |
1da177e4 LT |
1461 | } |
1462 | ||
4be44fcd | 1463 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1464 | { |
031ec77b | 1465 | acpi_status status; |
1da177e4 LT |
1466 | |
1467 | if (!device || !device->video) | |
d550d98d | 1468 | return -ENOENT; |
1da177e4 | 1469 | |
90130268 | 1470 | status = acpi_remove_notify_handler(device->dev->handle, |
4be44fcd LB |
1471 | ACPI_DEVICE_NOTIFY, |
1472 | acpi_video_device_notify); | |
cfa806f0 AK |
1473 | if (ACPI_FAILURE(status)) { |
1474 | printk(KERN_WARNING PREFIX | |
25985edc | 1475 | "Can't remove video notify handler\n"); |
cfa806f0 | 1476 | } |
e29b3ee3 | 1477 | if (device->backlight) { |
e29b3ee3 KP |
1478 | backlight_device_unregister(device->backlight); |
1479 | device->backlight = NULL; | |
1480 | } | |
4a703a8f | 1481 | if (device->cooling_dev) { |
702ed512 ZR |
1482 | sysfs_remove_link(&device->dev->dev.kobj, |
1483 | "thermal_cooling"); | |
4a703a8f | 1484 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1485 | "device"); |
4a703a8f DT |
1486 | thermal_cooling_device_unregister(device->cooling_dev); |
1487 | device->cooling_dev = NULL; | |
702ed512 | 1488 | } |
ff102ea9 | 1489 | |
d550d98d | 1490 | return 0; |
1da177e4 LT |
1491 | } |
1492 | ||
4be44fcd | 1493 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1494 | { |
4be44fcd | 1495 | int status; |
ff102ea9 | 1496 | struct acpi_video_device *dev, *next; |
1da177e4 | 1497 | |
bbac81f5 | 1498 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1499 | |
ff102ea9 | 1500 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1501 | |
ff102ea9 | 1502 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1503 | if (ACPI_FAILURE(status)) |
1504 | printk(KERN_WARNING PREFIX | |
1505 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1506 | |
ff102ea9 DT |
1507 | if (dev->brightness) { |
1508 | kfree(dev->brightness->levels); | |
1509 | kfree(dev->brightness); | |
1510 | } | |
1511 | list_del(&dev->entry); | |
1512 | kfree(dev); | |
1da177e4 LT |
1513 | } |
1514 | ||
bbac81f5 | 1515 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1516 | |
d550d98d | 1517 | return 0; |
1da177e4 LT |
1518 | } |
1519 | ||
1520 | /* acpi_video interface */ | |
1521 | ||
4be44fcd | 1522 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1523 | { |
a21101c4 | 1524 | return acpi_video_bus_DOS(video, 0, 0); |
1da177e4 LT |
1525 | } |
1526 | ||
4be44fcd | 1527 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 LT |
1528 | { |
1529 | return acpi_video_bus_DOS(video, 0, 1); | |
1530 | } | |
1531 | ||
7015558f | 1532 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1533 | { |
7015558f | 1534 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1535 | struct input_dev *input; |
17c452f9 | 1536 | int keycode = 0; |
e9dab196 | 1537 | |
1da177e4 | 1538 | if (!video) |
d550d98d | 1539 | return; |
1da177e4 | 1540 | |
e9dab196 | 1541 | input = video->input; |
1da177e4 LT |
1542 | |
1543 | switch (event) { | |
98fb8fe1 | 1544 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1545 | * most likely via hotkey. */ |
14e04fb3 | 1546 | acpi_bus_generate_proc_event(device, event, 0); |
8a37c65d | 1547 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1548 | break; |
1549 | ||
98fb8fe1 | 1550 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1551 | * connector. */ |
1552 | acpi_video_device_enumerate(video); | |
1553 | acpi_video_device_rebind(video); | |
14e04fb3 | 1554 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1555 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1556 | break; |
1557 | ||
4be44fcd | 1558 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
25c87f7f | 1559 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1560 | keycode = KEY_SWITCHVIDEOMODE; |
1561 | break; | |
4be44fcd | 1562 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
25c87f7f | 1563 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1564 | keycode = KEY_VIDEO_NEXT; |
1565 | break; | |
4be44fcd | 1566 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
14e04fb3 | 1567 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1568 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1569 | break; |
1570 | ||
1571 | default: | |
1572 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1573 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1574 | break; |
1575 | } | |
1576 | ||
8a37c65d LT |
1577 | if (acpi_notifier_call_chain(device, event, 0)) |
1578 | /* Something vetoed the keypress. */ | |
1579 | keycode = 0; | |
17c452f9 MG |
1580 | |
1581 | if (keycode) { | |
1582 | input_report_key(input, keycode, 1); | |
1583 | input_sync(input); | |
1584 | input_report_key(input, keycode, 0); | |
1585 | input_sync(input); | |
1586 | } | |
e9dab196 | 1587 | |
d550d98d | 1588 | return; |
1da177e4 LT |
1589 | } |
1590 | ||
4be44fcd | 1591 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1592 | { |
50dd0969 | 1593 | struct acpi_video_device *video_device = data; |
4be44fcd | 1594 | struct acpi_device *device = NULL; |
e9dab196 LY |
1595 | struct acpi_video_bus *bus; |
1596 | struct input_dev *input; | |
17c452f9 | 1597 | int keycode = 0; |
1da177e4 | 1598 | |
1da177e4 | 1599 | if (!video_device) |
d550d98d | 1600 | return; |
1da177e4 | 1601 | |
e6afa0de | 1602 | device = video_device->dev; |
e9dab196 LY |
1603 | bus = video_device->video; |
1604 | input = bus->input; | |
1da177e4 LT |
1605 | |
1606 | switch (event) { | |
4be44fcd | 1607 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1608 | if (brightness_switch_enabled) |
1609 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1610 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1611 | keycode = KEY_BRIGHTNESS_CYCLE; |
1612 | break; | |
4be44fcd | 1613 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1614 | if (brightness_switch_enabled) |
1615 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1616 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1617 | keycode = KEY_BRIGHTNESSUP; |
1618 | break; | |
4be44fcd | 1619 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1620 | if (brightness_switch_enabled) |
1621 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1622 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1623 | keycode = KEY_BRIGHTNESSDOWN; |
1624 | break; | |
70f23fd6 | 1625 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1626 | if (brightness_switch_enabled) |
1627 | acpi_video_switch_brightness(video_device, event); | |
25c87f7f | 1628 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 LY |
1629 | keycode = KEY_BRIGHTNESS_ZERO; |
1630 | break; | |
4be44fcd | 1631 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1632 | if (brightness_switch_enabled) |
1633 | acpi_video_switch_brightness(video_device, event); | |
14e04fb3 | 1634 | acpi_bus_generate_proc_event(device, event, 0); |
e9dab196 | 1635 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1636 | break; |
1637 | default: | |
1638 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1639 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1640 | break; |
1641 | } | |
e9dab196 | 1642 | |
7761f638 | 1643 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1644 | |
1645 | if (keycode) { | |
1646 | input_report_key(input, keycode, 1); | |
1647 | input_sync(input); | |
1648 | input_report_key(input, keycode, 0); | |
1649 | input_sync(input); | |
1650 | } | |
e9dab196 | 1651 | |
d550d98d | 1652 | return; |
1da177e4 LT |
1653 | } |
1654 | ||
ac7729da RW |
1655 | static int acpi_video_resume(struct notifier_block *nb, |
1656 | unsigned long val, void *ign) | |
863c1490 MG |
1657 | { |
1658 | struct acpi_video_bus *video; | |
1659 | struct acpi_video_device *video_device; | |
1660 | int i; | |
1661 | ||
ac7729da RW |
1662 | switch (val) { |
1663 | case PM_HIBERNATION_PREPARE: | |
1664 | case PM_SUSPEND_PREPARE: | |
1665 | case PM_RESTORE_PREPARE: | |
1666 | return NOTIFY_DONE; | |
1667 | } | |
863c1490 | 1668 | |
ac7729da RW |
1669 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1670 | ||
1671 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1672 | |
1673 | for (i = 0; i < video->attached_count; i++) { | |
1674 | video_device = video->attached_array[i].bind_info; | |
1675 | if (video_device && video_device->backlight) | |
1676 | acpi_video_set_brightness(video_device->backlight); | |
1677 | } | |
ac7729da RW |
1678 | |
1679 | return NOTIFY_OK; | |
863c1490 MG |
1680 | } |
1681 | ||
c504f8cb ZR |
1682 | static acpi_status |
1683 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1684 | void **return_value) | |
1685 | { | |
1686 | struct acpi_device *device = context; | |
1687 | struct acpi_device *sibling; | |
1688 | int result; | |
1689 | ||
1690 | if (handle == device->handle) | |
1691 | return AE_CTRL_TERMINATE; | |
1692 | ||
1693 | result = acpi_bus_get_device(handle, &sibling); | |
1694 | if (result) | |
1695 | return AE_OK; | |
1696 | ||
1697 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1698 | return AE_ALREADY_EXISTS; | |
1699 | ||
1700 | return AE_OK; | |
1701 | } | |
1702 | ||
ac7729da RW |
1703 | static int instance; |
1704 | ||
4be44fcd | 1705 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1706 | { |
f51e8391 | 1707 | struct acpi_video_bus *video; |
e9dab196 | 1708 | struct input_dev *input; |
f51e8391 | 1709 | int error; |
c504f8cb ZR |
1710 | acpi_status status; |
1711 | ||
1712 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1713 | device->parent->handle, 1, | |
1714 | acpi_video_bus_match, NULL, | |
1715 | device, NULL); | |
1716 | if (status == AE_ALREADY_EXISTS) { | |
1717 | printk(KERN_WARNING FW_BUG | |
1718 | "Duplicate ACPI video bus devices for the" | |
1719 | " same VGA controller, please try module " | |
1720 | "parameter \"video.allow_duplicates=1\"" | |
1721 | "if the current driver doesn't work.\n"); | |
1722 | if (!allow_duplicates) | |
1723 | return -ENODEV; | |
1724 | } | |
1da177e4 | 1725 | |
36bcbec7 | 1726 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1727 | if (!video) |
d550d98d | 1728 | return -ENOMEM; |
1da177e4 | 1729 | |
e6d9da1d ZR |
1730 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1731 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1732 | if (instance) | |
1733 | device->pnp.bus_id[3] = '0' + instance; | |
1734 | instance ++; | |
1735 | } | |
f3b39f13 ZY |
1736 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1737 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1738 | if (instance) | |
1739 | device->pnp.bus_id[3] = '0' + instance; | |
1740 | instance++; | |
1741 | } | |
e6d9da1d | 1742 | |
e6afa0de | 1743 | video->device = device; |
1da177e4 LT |
1744 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1745 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1746 | device->driver_data = video; |
1da177e4 LT |
1747 | |
1748 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1749 | error = acpi_video_bus_check(video); |
1750 | if (error) | |
1751 | goto err_free_video; | |
1da177e4 | 1752 | |
bbac81f5 | 1753 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1754 | INIT_LIST_HEAD(&video->video_device_list); |
1755 | ||
ea9f8856 IM |
1756 | error = acpi_video_bus_get_devices(video, device); |
1757 | if (error) | |
1758 | goto err_free_video; | |
1da177e4 | 1759 | |
e9dab196 | 1760 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1761 | if (!input) { |
1762 | error = -ENOMEM; | |
b60e7f61 | 1763 | goto err_put_video; |
f51e8391 | 1764 | } |
e9dab196 | 1765 | |
b60e7f61 IM |
1766 | error = acpi_video_bus_start_devices(video); |
1767 | if (error) | |
1768 | goto err_free_input_dev; | |
1769 | ||
e9dab196 LY |
1770 | snprintf(video->phys, sizeof(video->phys), |
1771 | "%s/video/input0", acpi_device_hid(video->device)); | |
1772 | ||
1773 | input->name = acpi_device_name(video->device); | |
1774 | input->phys = video->phys; | |
1775 | input->id.bustype = BUS_HOST; | |
1776 | input->id.product = 0x06; | |
91c05c66 | 1777 | input->dev.parent = &device->dev; |
e9dab196 LY |
1778 | input->evbit[0] = BIT(EV_KEY); |
1779 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1780 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1781 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1782 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1783 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1784 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1785 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1786 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1787 | |
1da177e4 | 1788 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1789 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1790 | video->flags.multihead ? "yes" : "no", | |
1791 | video->flags.rom ? "yes" : "no", | |
1792 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1793 | |
ac7729da RW |
1794 | video->pm_nb.notifier_call = acpi_video_resume; |
1795 | video->pm_nb.priority = 0; | |
ea9f8856 IM |
1796 | error = register_pm_notifier(&video->pm_nb); |
1797 | if (error) | |
301f33fb DC |
1798 | goto err_stop_video; |
1799 | ||
1800 | error = input_register_device(input); | |
1801 | if (error) | |
1802 | goto err_unregister_pm_notifier; | |
ac7729da | 1803 | |
f51e8391 DT |
1804 | return 0; |
1805 | ||
301f33fb DC |
1806 | err_unregister_pm_notifier: |
1807 | unregister_pm_notifier(&video->pm_nb); | |
f51e8391 DT |
1808 | err_stop_video: |
1809 | acpi_video_bus_stop_devices(video); | |
b60e7f61 IM |
1810 | err_free_input_dev: |
1811 | input_free_device(input); | |
ea9f8856 | 1812 | err_put_video: |
f51e8391 DT |
1813 | acpi_video_bus_put_devices(video); |
1814 | kfree(video->attached_array); | |
f51e8391 DT |
1815 | err_free_video: |
1816 | kfree(video); | |
db89b4f0 | 1817 | device->driver_data = NULL; |
1da177e4 | 1818 | |
f51e8391 | 1819 | return error; |
1da177e4 LT |
1820 | } |
1821 | ||
51fac838 | 1822 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1823 | { |
4be44fcd | 1824 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1825 | |
1da177e4 LT |
1826 | |
1827 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1828 | return -EINVAL; |
1da177e4 | 1829 | |
50dd0969 | 1830 | video = acpi_driver_data(device); |
1da177e4 | 1831 | |
ac7729da RW |
1832 | unregister_pm_notifier(&video->pm_nb); |
1833 | ||
1da177e4 | 1834 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1835 | acpi_video_bus_put_devices(video); |
1da177e4 | 1836 | |
e9dab196 | 1837 | input_unregister_device(video->input); |
6044ec88 | 1838 | kfree(video->attached_array); |
1da177e4 LT |
1839 | kfree(video); |
1840 | ||
d550d98d | 1841 | return 0; |
1da177e4 LT |
1842 | } |
1843 | ||
c6996bdd AC |
1844 | static int __init is_i740(struct pci_dev *dev) |
1845 | { | |
1846 | if (dev->device == 0x00D1) | |
1847 | return 1; | |
1848 | if (dev->device == 0x7000) | |
1849 | return 1; | |
1850 | return 0; | |
1851 | } | |
1852 | ||
74a365b3 MG |
1853 | static int __init intel_opregion_present(void) |
1854 | { | |
c6996bdd | 1855 | int opregion = 0; |
74a365b3 MG |
1856 | struct pci_dev *dev = NULL; |
1857 | u32 address; | |
1858 | ||
1859 | for_each_pci_dev(dev) { | |
1860 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1861 | continue; | |
1862 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1863 | continue; | |
c6996bdd AC |
1864 | /* We don't want to poke around undefined i740 registers */ |
1865 | if (is_i740(dev)) | |
1866 | continue; | |
74a365b3 MG |
1867 | pci_read_config_dword(dev, 0xfc, &address); |
1868 | if (!address) | |
1869 | continue; | |
c6996bdd | 1870 | opregion = 1; |
74a365b3 | 1871 | } |
c6996bdd | 1872 | return opregion; |
74a365b3 MG |
1873 | } |
1874 | ||
1875 | int acpi_video_register(void) | |
1da177e4 | 1876 | { |
4be44fcd | 1877 | int result = 0; |
86e437f0 ZY |
1878 | if (register_count) { |
1879 | /* | |
1880 | * if the function of acpi_video_register is already called, | |
1881 | * don't register the acpi_vide_bus again and return no error. | |
1882 | */ | |
1883 | return 0; | |
1884 | } | |
1da177e4 | 1885 | |
1da177e4 | 1886 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1887 | if (result < 0) |
d550d98d | 1888 | return -ENODEV; |
1da177e4 | 1889 | |
86e437f0 ZY |
1890 | /* |
1891 | * When the acpi_video_bus is loaded successfully, increase | |
1892 | * the counter reference. | |
1893 | */ | |
1894 | register_count = 1; | |
1895 | ||
d550d98d | 1896 | return 0; |
1da177e4 | 1897 | } |
74a365b3 MG |
1898 | EXPORT_SYMBOL(acpi_video_register); |
1899 | ||
86e437f0 ZY |
1900 | void acpi_video_unregister(void) |
1901 | { | |
1902 | if (!register_count) { | |
1903 | /* | |
1904 | * If the acpi video bus is already unloaded, don't | |
1905 | * unload it again and return directly. | |
1906 | */ | |
1907 | return; | |
1908 | } | |
1909 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1910 | ||
86e437f0 ZY |
1911 | register_count = 0; |
1912 | ||
1913 | return; | |
1914 | } | |
1915 | EXPORT_SYMBOL(acpi_video_unregister); | |
1916 | ||
74a365b3 MG |
1917 | /* |
1918 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1919 | * the video opregion code to be run first in order to initialise | |
1920 | * state before any ACPI video calls are made. To handle this we defer | |
1921 | * registration of the video class until the opregion code has run. | |
1922 | */ | |
1923 | ||
1924 | static int __init acpi_video_init(void) | |
1925 | { | |
45cb50e6 ZR |
1926 | dmi_check_system(video_dmi_table); |
1927 | ||
74a365b3 MG |
1928 | if (intel_opregion_present()) |
1929 | return 0; | |
1930 | ||
1931 | return acpi_video_register(); | |
1932 | } | |
1da177e4 | 1933 | |
86e437f0 | 1934 | static void __exit acpi_video_exit(void) |
1da177e4 | 1935 | { |
86e437f0 | 1936 | acpi_video_unregister(); |
1da177e4 | 1937 | |
d550d98d | 1938 | return; |
1da177e4 LT |
1939 | } |
1940 | ||
1941 | module_init(acpi_video_init); | |
1942 | module_exit(acpi_video_exit); |