Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
21fcb34e | 2 | * video.c - ACPI Video Driver |
1da177e4 LT |
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 | |
8c5bd7ad RW |
47 | #include "internal.h" |
48 | ||
a192a958 LB |
49 | #define PREFIX "ACPI: " |
50 | ||
1da177e4 LT |
51 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
52 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
53 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
54 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
55 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
56 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
57 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
58 | ||
f4715189 TT |
59 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
60 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
61 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
62 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
63 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 64 | |
2f3d000a | 65 | #define MAX_NAME_LEN 20 |
1da177e4 | 66 | |
1da177e4 | 67 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 68 | ACPI_MODULE_NAME("video"); |
1da177e4 | 69 | |
f52fd66d | 70 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 71 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
72 | MODULE_LICENSE("GPL"); |
73 | ||
90ab5ee9 | 74 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
75 | module_param(brightness_switch_enabled, bool, 0644); |
76 | ||
c504f8cb ZR |
77 | /* |
78 | * By default, we don't allow duplicate ACPI video bus devices | |
79 | * under the same VGA controller | |
80 | */ | |
90ab5ee9 | 81 | static bool allow_duplicates; |
c504f8cb ZR |
82 | module_param(allow_duplicates, bool, 0644); |
83 | ||
99fd1895 ZR |
84 | /* |
85 | * Some BIOSes claim they use minimum backlight at boot, | |
86 | * and this may bring dimming screen after boot | |
87 | */ | |
90ab5ee9 | 88 | static bool use_bios_initial_backlight = 1; |
99fd1895 ZR |
89 | module_param(use_bios_initial_backlight, bool, 0644); |
90 | ||
915ea7e4 | 91 | static int register_count; |
4be44fcd | 92 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 95 | |
1ba90e3a TR |
96 | static const struct acpi_device_id video_device_ids[] = { |
97 | {ACPI_VIDEO_HID, 0}, | |
98 | {"", 0}, | |
99 | }; | |
100 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
101 | ||
1da177e4 | 102 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 103 | .name = "video", |
1da177e4 | 104 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 105 | .ids = video_device_ids, |
1da177e4 LT |
106 | .ops = { |
107 | .add = acpi_video_bus_add, | |
108 | .remove = acpi_video_bus_remove, | |
7015558f | 109 | .notify = acpi_video_bus_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | struct acpi_video_bus_flags { | |
4be44fcd LB |
114 | u8 multihead:1; /* can switch video heads */ |
115 | u8 rom:1; /* can retrieve a video rom */ | |
116 | u8 post:1; /* can configure the head to */ | |
117 | u8 reserved:5; | |
1da177e4 LT |
118 | }; |
119 | ||
120 | struct acpi_video_bus_cap { | |
21fcb34e FC |
121 | u8 _DOS:1; /* Enable/Disable output switching */ |
122 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
123 | u8 _ROM:1; /* Get ROM Data */ | |
124 | u8 _GPD:1; /* Get POST Device */ | |
125 | u8 _SPD:1; /* Set POST Device */ | |
126 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 127 | u8 reserved:2; |
1da177e4 LT |
128 | }; |
129 | ||
4be44fcd LB |
130 | struct acpi_video_device_attrib { |
131 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
132 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
133 | u32 display_type:4; /* Describe the specific type in use */ | |
134 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
135 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
136 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 137 | the VGA device. */ |
21fcb34e FC |
138 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
139 | u32 reserved:10; /* Must be 0 */ | |
140 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_video_enumerated_device { | |
144 | union { | |
145 | u32 int_val; | |
4be44fcd | 146 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
147 | } value; |
148 | struct acpi_video_device *bind_info; | |
149 | }; | |
150 | ||
151 | struct acpi_video_bus { | |
e6afa0de | 152 | struct acpi_device *device; |
4be44fcd | 153 | u8 dos_setting; |
1da177e4 | 154 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
155 | u8 attached_count; |
156 | struct acpi_video_bus_cap cap; | |
1da177e4 | 157 | struct acpi_video_bus_flags flags; |
4be44fcd | 158 | struct list_head video_device_list; |
bbac81f5 | 159 | struct mutex device_list_lock; /* protects video_device_list */ |
e9dab196 LY |
160 | struct input_dev *input; |
161 | char phys[32]; /* for input device */ | |
ac7729da | 162 | struct notifier_block pm_nb; |
1da177e4 LT |
163 | }; |
164 | ||
165 | struct acpi_video_device_flags { | |
4be44fcd LB |
166 | u8 crt:1; |
167 | u8 lcd:1; | |
168 | u8 tvout:1; | |
82cae999 | 169 | u8 dvi:1; |
4be44fcd LB |
170 | u8 bios:1; |
171 | u8 unknown:1; | |
91e13aa3 AL |
172 | u8 notify:1; |
173 | u8 reserved:1; | |
1da177e4 LT |
174 | }; |
175 | ||
176 | struct acpi_video_device_cap { | |
21fcb34e FC |
177 | u8 _ADR:1; /* Return the unique ID */ |
178 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
179 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 180 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 181 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 182 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
183 | }; |
184 | ||
d32f6947 ZR |
185 | struct acpi_video_brightness_flags { |
186 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 187 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 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 | |
21fcb34e | 232 | /* backlight device sysfs support */ |
2f3d000a YL |
233 | static int acpi_video_get_brightness(struct backlight_device *bd) |
234 | { | |
27663c58 | 235 | unsigned long long cur_level; |
38531e6f | 236 | int i; |
7c364e79 | 237 | struct acpi_video_device *vd = 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) | |
21fcb34e FC |
243 | /* |
244 | * The first two entries are special - see page 575 | |
245 | * of the ACPI spec 3.0 | |
246 | */ | |
915ea7e4 | 247 | return i - 2; |
38531e6f MG |
248 | } |
249 | return 0; | |
2f3d000a YL |
250 | } |
251 | ||
252 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
253 | { | |
24450c7a | 254 | int request_level = bd->props.brightness + 2; |
7c364e79 | 255 | struct acpi_video_device *vd = 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 | ||
915ea7e4 | 303 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
304 | return -EINVAL; |
305 | ||
306 | state = video->brightness->count - state; | |
915ea7e4 | 307 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
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 | ||
21fcb34e FC |
317 | /* |
318 | * -------------------------------------------------------------------------- | |
319 | * Video Management | |
320 | * -------------------------------------------------------------------------- | |
321 | */ | |
1da177e4 | 322 | |
1da177e4 | 323 | static int |
4be44fcd LB |
324 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
325 | union acpi_object **levels) | |
1da177e4 | 326 | { |
4be44fcd LB |
327 | int status; |
328 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
329 | union acpi_object *obj; | |
1da177e4 | 330 | |
1da177e4 LT |
331 | |
332 | *levels = NULL; | |
333 | ||
90130268 | 334 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 335 | if (!ACPI_SUCCESS(status)) |
d550d98d | 336 | return status; |
4be44fcd | 337 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 338 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 339 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
340 | status = -EFAULT; |
341 | goto err; | |
342 | } | |
343 | ||
344 | *levels = obj; | |
345 | ||
d550d98d | 346 | return 0; |
1da177e4 | 347 | |
915ea7e4 | 348 | err: |
6044ec88 | 349 | kfree(buffer.pointer); |
1da177e4 | 350 | |
d550d98d | 351 | return status; |
1da177e4 LT |
352 | } |
353 | ||
354 | static int | |
4be44fcd | 355 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 356 | { |
24450c7a | 357 | int status; |
9e6dada9 | 358 | int state; |
1da177e4 | 359 | |
0db98202 JL |
360 | status = acpi_execute_simple_method(device->dev->handle, |
361 | "_BCM", level); | |
24450c7a ZR |
362 | if (ACPI_FAILURE(status)) { |
363 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
364 | return -EIO; | |
365 | } | |
366 | ||
4500ca8e | 367 | device->brightness->curr = level; |
9e6dada9 | 368 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 369 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
370 | if (device->backlight) |
371 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
372 | return 0; |
373 | } | |
9e6dada9 | 374 | |
24450c7a ZR |
375 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
376 | return -EINVAL; | |
1da177e4 LT |
377 | } |
378 | ||
45cb50e6 ZR |
379 | /* |
380 | * For some buggy _BQC methods, we need to add a constant value to | |
381 | * the _BQC return value to get the actual current brightness level | |
382 | */ | |
383 | ||
384 | static int bqc_offset_aml_bug_workaround; | |
385 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
386 | { | |
387 | bqc_offset_aml_bug_workaround = 9; | |
388 | return 0; | |
389 | } | |
390 | ||
129ff8f8 ZR |
391 | static int video_ignore_initial_backlight(const struct dmi_system_id *d) |
392 | { | |
393 | use_bios_initial_backlight = 0; | |
394 | return 0; | |
395 | } | |
396 | ||
45cb50e6 ZR |
397 | static struct dmi_system_id video_dmi_table[] __initdata = { |
398 | /* | |
399 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
400 | */ | |
401 | { | |
402 | .callback = video_set_bqc_offset, | |
403 | .ident = "Acer Aspire 5720", | |
404 | .matches = { | |
405 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
406 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
407 | }, | |
408 | }, | |
5afc4abe LB |
409 | { |
410 | .callback = video_set_bqc_offset, | |
411 | .ident = "Acer Aspire 5710Z", | |
412 | .matches = { | |
413 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
414 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
415 | }, | |
416 | }, | |
34ac272b ZR |
417 | { |
418 | .callback = video_set_bqc_offset, | |
419 | .ident = "eMachines E510", | |
420 | .matches = { | |
421 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
422 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
423 | }, | |
424 | }, | |
93bcece2 ZR |
425 | { |
426 | .callback = video_set_bqc_offset, | |
427 | .ident = "Acer Aspire 5315", | |
428 | .matches = { | |
429 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
430 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
431 | }, | |
432 | }, | |
152a4e63 ZR |
433 | { |
434 | .callback = video_set_bqc_offset, | |
435 | .ident = "Acer Aspire 7720", | |
436 | .matches = { | |
437 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
438 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
439 | }, | |
440 | }, | |
129ff8f8 ZR |
441 | { |
442 | .callback = video_ignore_initial_backlight, | |
443 | .ident = "HP Folio 13-2000", | |
444 | .matches = { | |
445 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
446 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), | |
447 | }, | |
448 | }, | |
9657a565 LT |
449 | { |
450 | .callback = video_ignore_initial_backlight, | |
451 | .ident = "Fujitsu E753", | |
452 | .matches = { | |
453 | DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"), | |
454 | DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"), | |
455 | }, | |
456 | }, | |
771d09b3 GMDV |
457 | { |
458 | .callback = video_ignore_initial_backlight, | |
459 | .ident = "HP Pavilion dm4", | |
460 | .matches = { | |
461 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
462 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"), | |
463 | }, | |
464 | }, | |
780a6ec6 AW |
465 | { |
466 | .callback = video_ignore_initial_backlight, | |
467 | .ident = "HP Pavilion g6 Notebook PC", | |
468 | .matches = { | |
469 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
470 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion g6 Notebook PC"), | |
471 | }, | |
472 | }, | |
4ef366c5 AH |
473 | { |
474 | .callback = video_ignore_initial_backlight, | |
475 | .ident = "HP 1000 Notebook PC", | |
476 | .matches = { | |
477 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
478 | DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), | |
479 | }, | |
480 | }, | |
fedbe9bc AH |
481 | { |
482 | .callback = video_ignore_initial_backlight, | |
483 | .ident = "HP Pavilion m4", | |
484 | .matches = { | |
485 | DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), | |
486 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), | |
487 | }, | |
488 | }, | |
45cb50e6 ZR |
489 | {} |
490 | }; | |
491 | ||
994fa63c DB |
492 | static unsigned long long |
493 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
494 | unsigned long long bqc_value) | |
495 | { | |
496 | unsigned long long level; | |
497 | ||
498 | if (device->brightness->flags._BQC_use_index) { | |
499 | /* | |
500 | * _BQC returns an index that doesn't account for | |
501 | * the first 2 items with special meaning, so we need | |
502 | * to compensate for that by offsetting ourselves | |
503 | */ | |
504 | if (device->brightness->flags._BCL_reversed) | |
505 | bqc_value = device->brightness->count - 3 - bqc_value; | |
506 | ||
507 | level = device->brightness->levels[bqc_value + 2]; | |
508 | } else { | |
509 | level = bqc_value; | |
510 | } | |
511 | ||
512 | level += bqc_offset_aml_bug_workaround; | |
513 | ||
514 | return level; | |
515 | } | |
516 | ||
1da177e4 | 517 | static int |
4be44fcd | 518 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 519 | unsigned long long *level, bool raw) |
1da177e4 | 520 | { |
c8890f90 | 521 | acpi_status status = AE_OK; |
4e231fa4 | 522 | int i; |
c8890f90 | 523 | |
c60d638e ZR |
524 | if (device->cap._BQC || device->cap._BCQ) { |
525 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
526 | ||
527 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
528 | NULL, level); |
529 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
530 | if (raw) { |
531 | /* | |
532 | * Caller has indicated he wants the raw | |
533 | * value returned by _BQC, so don't furtherly | |
534 | * mess with the value. | |
535 | */ | |
536 | return 0; | |
537 | } | |
538 | ||
994fa63c | 539 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 540 | |
4e231fa4 VS |
541 | for (i = 2; i < device->brightness->count; i++) |
542 | if (device->brightness->levels[i] == *level) { | |
543 | device->brightness->curr = *level; | |
544 | return 0; | |
915ea7e4 | 545 | } |
a89803df DB |
546 | /* |
547 | * BQC returned an invalid level. | |
548 | * Stop using it. | |
549 | */ | |
550 | ACPI_WARNING((AE_INFO, | |
551 | "%s returned an invalid level", | |
552 | buf)); | |
553 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 554 | } else { |
21fcb34e FC |
555 | /* |
556 | * Fixme: | |
c8890f90 ZR |
557 | * should we return an error or ignore this failure? |
558 | * dev->brightness->curr is a cached value which stores | |
559 | * the correct current backlight level in most cases. | |
560 | * ACPI video backlight still works w/ buggy _BQC. | |
561 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
562 | */ | |
c60d638e ZR |
563 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
564 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
565 | } |
566 | } | |
567 | ||
4500ca8e | 568 | *level = device->brightness->curr; |
c8890f90 | 569 | return 0; |
1da177e4 LT |
570 | } |
571 | ||
572 | static int | |
4be44fcd LB |
573 | acpi_video_device_EDID(struct acpi_video_device *device, |
574 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 575 | { |
4be44fcd LB |
576 | int status; |
577 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
578 | union acpi_object *obj; | |
579 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
580 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 581 | |
1da177e4 LT |
582 | |
583 | *edid = NULL; | |
584 | ||
585 | if (!device) | |
d550d98d | 586 | return -ENODEV; |
1da177e4 LT |
587 | if (length == 128) |
588 | arg0.integer.value = 1; | |
589 | else if (length == 256) | |
590 | arg0.integer.value = 2; | |
591 | else | |
d550d98d | 592 | return -EINVAL; |
1da177e4 | 593 | |
90130268 | 594 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 595 | if (ACPI_FAILURE(status)) |
d550d98d | 596 | return -ENODEV; |
1da177e4 | 597 | |
50dd0969 | 598 | obj = buffer.pointer; |
1da177e4 LT |
599 | |
600 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
601 | *edid = obj; | |
602 | else { | |
6468463a | 603 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
604 | status = -EFAULT; |
605 | kfree(obj); | |
606 | } | |
607 | ||
d550d98d | 608 | return status; |
1da177e4 LT |
609 | } |
610 | ||
1da177e4 LT |
611 | /* bus */ |
612 | ||
1da177e4 LT |
613 | /* |
614 | * Arg: | |
21fcb34e FC |
615 | * video : video bus device pointer |
616 | * bios_flag : | |
1da177e4 LT |
617 | * 0. The system BIOS should NOT automatically switch(toggle) |
618 | * the active display output. | |
619 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 620 | * active display output. No switch event. |
1da177e4 LT |
621 | * 2. The _DGS value should be locked. |
622 | * 3. The system BIOS should not automatically switch (toggle) the | |
623 | * active display output, but instead generate the display switch | |
624 | * event notify code. | |
625 | * lcd_flag : | |
626 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 627 | * of the LCD when the power changes from AC to DC |
21fcb34e | 628 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 629 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 630 | * Return Value: |
ea9f8856 | 631 | * -EINVAL wrong arg. |
1da177e4 LT |
632 | */ |
633 | ||
634 | static int | |
4be44fcd | 635 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 636 | { |
ea9f8856 | 637 | acpi_status status; |
1da177e4 | 638 | |
b0373843 ZR |
639 | if (!video->cap._DOS) |
640 | return 0; | |
1da177e4 | 641 | |
ea9f8856 IM |
642 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
643 | return -EINVAL; | |
0db98202 JL |
644 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
645 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
646 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
647 | if (ACPI_FAILURE(status)) |
648 | return -EIO; | |
1da177e4 | 649 | |
ea9f8856 | 650 | return 0; |
1da177e4 LT |
651 | } |
652 | ||
935e5f29 ZR |
653 | /* |
654 | * Simple comparison function used to sort backlight levels. | |
655 | */ | |
656 | ||
657 | static int | |
658 | acpi_video_cmp_level(const void *a, const void *b) | |
659 | { | |
660 | return *(int *)a - *(int *)b; | |
661 | } | |
662 | ||
a50188da AL |
663 | /* |
664 | * Decides if _BQC/_BCQ for this system is usable | |
665 | * | |
666 | * We do this by changing the level first and then read out the current | |
667 | * brightness level, if the value does not match, find out if it is using | |
668 | * index. If not, clear the _BQC/_BCQ capability. | |
669 | */ | |
670 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
671 | int max_level, int current_level) | |
672 | { | |
673 | struct acpi_video_device_brightness *br = device->brightness; | |
674 | int result; | |
675 | unsigned long long level; | |
676 | int test_level; | |
677 | ||
678 | /* don't mess with existing known broken systems */ | |
679 | if (bqc_offset_aml_bug_workaround) | |
680 | return 0; | |
681 | ||
682 | /* | |
683 | * Some systems always report current brightness level as maximum | |
684 | * through _BQC, we need to test another value for them. | |
685 | */ | |
b3b301c5 | 686 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
687 | |
688 | result = acpi_video_device_lcd_set_level(device, test_level); | |
689 | if (result) | |
690 | return result; | |
691 | ||
692 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
693 | if (result) | |
694 | return result; | |
695 | ||
696 | if (level != test_level) { | |
697 | /* buggy _BQC found, need to find out if it uses index */ | |
698 | if (level < br->count) { | |
699 | if (br->flags._BCL_reversed) | |
700 | level = br->count - 3 - level; | |
701 | if (br->levels[level + 2] == test_level) | |
702 | br->flags._BQC_use_index = 1; | |
703 | } | |
704 | ||
705 | if (!br->flags._BQC_use_index) | |
706 | device->cap._BQC = device->cap._BCQ = 0; | |
707 | } | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | ||
1da177e4 | 713 | /* |
21fcb34e FC |
714 | * Arg: |
715 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
716 | * |
717 | * Return Value: | |
469778c1 JJ |
718 | * Maximum brightness level |
719 | * | |
720 | * Allocate and initialize device->brightness. | |
721 | */ | |
722 | ||
723 | static int | |
724 | acpi_video_init_brightness(struct acpi_video_device *device) | |
725 | { | |
726 | union acpi_object *obj = NULL; | |
d32f6947 | 727 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 728 | unsigned long long level, level_old; |
469778c1 JJ |
729 | union acpi_object *o; |
730 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 731 | int result = -EINVAL; |
469778c1 JJ |
732 | |
733 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
734 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
735 | "LCD brightness level\n")); | |
736 | goto out; | |
737 | } | |
738 | ||
739 | if (obj->package.count < 2) | |
740 | goto out; | |
741 | ||
742 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
743 | if (!br) { | |
744 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 745 | result = -ENOMEM; |
469778c1 JJ |
746 | goto out; |
747 | } | |
748 | ||
d32f6947 | 749 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 750 | GFP_KERNEL); |
1a7c618a ZR |
751 | if (!br->levels) { |
752 | result = -ENOMEM; | |
469778c1 | 753 | goto out_free; |
1a7c618a | 754 | } |
469778c1 JJ |
755 | |
756 | for (i = 0; i < obj->package.count; i++) { | |
757 | o = (union acpi_object *)&obj->package.elements[i]; | |
758 | if (o->type != ACPI_TYPE_INTEGER) { | |
759 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
760 | continue; | |
761 | } | |
762 | br->levels[count] = (u32) o->integer.value; | |
763 | ||
764 | if (br->levels[count] > max_level) | |
765 | max_level = br->levels[count]; | |
766 | count++; | |
767 | } | |
768 | ||
d32f6947 ZR |
769 | /* |
770 | * some buggy BIOS don't export the levels | |
771 | * when machine is on AC/Battery in _BCL package. | |
772 | * In this case, the first two elements in _BCL packages | |
773 | * are also supported brightness levels that OS should take care of. | |
774 | */ | |
90af2cf6 ZR |
775 | for (i = 2; i < count; i++) { |
776 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 777 | level_ac_battery++; |
90af2cf6 ZR |
778 | if (br->levels[i] == br->levels[1]) |
779 | level_ac_battery++; | |
780 | } | |
d32f6947 ZR |
781 | |
782 | if (level_ac_battery < 2) { | |
783 | level_ac_battery = 2 - level_ac_battery; | |
784 | br->flags._BCL_no_ac_battery_levels = 1; | |
785 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
786 | br->levels[i] = br->levels[i - level_ac_battery]; | |
787 | count += level_ac_battery; | |
788 | } else if (level_ac_battery > 2) | |
bf6787eb | 789 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 790 | |
d80fb99f ZR |
791 | /* Check if the _BCL package is in a reversed order */ |
792 | if (max_level == br->levels[2]) { | |
793 | br->flags._BCL_reversed = 1; | |
794 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
795 | acpi_video_cmp_level, NULL); | |
796 | } else if (max_level != br->levels[count - 1]) | |
797 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 798 | "Found unordered _BCL package")); |
469778c1 JJ |
799 | |
800 | br->count = count; | |
801 | device->brightness = br; | |
1a7c618a | 802 | |
1a7c618a | 803 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 804 | br->curr = level = max_level; |
e047cca6 ZR |
805 | |
806 | if (!device->cap._BQC) | |
807 | goto set_level; | |
808 | ||
a89803df DB |
809 | result = acpi_video_device_lcd_get_level_current(device, |
810 | &level_old, true); | |
1a7c618a ZR |
811 | if (result) |
812 | goto out_free_levels; | |
813 | ||
a50188da | 814 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
815 | if (result) |
816 | goto out_free_levels; | |
a50188da AL |
817 | /* |
818 | * cap._BQC may get cleared due to _BQC is found to be broken | |
819 | * in acpi_video_bqc_quirk, so check again here. | |
820 | */ | |
821 | if (!device->cap._BQC) | |
822 | goto set_level; | |
e047cca6 | 823 | |
994fa63c DB |
824 | if (use_bios_initial_backlight) { |
825 | level = acpi_video_bqc_value_to_level(device, level_old); | |
90c53ca4 | 826 | /* |
994fa63c DB |
827 | * On some buggy laptops, _BQC returns an uninitialized |
828 | * value when invoked for the first time, i.e. | |
829 | * level_old is invalid (no matter whether it's a level | |
830 | * or an index). Set the backlight to max_level in this case. | |
90c53ca4 | 831 | */ |
994fa63c DB |
832 | for (i = 2; i < br->count; i++) |
833 | if (level_old == br->levels[i]) | |
834 | break; | |
835 | if (i == br->count) | |
836 | level = max_level; | |
90c53ca4 | 837 | } |
e047cca6 | 838 | |
e047cca6 | 839 | set_level: |
90c53ca4 | 840 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
841 | if (result) |
842 | goto out_free_levels; | |
1a7c618a | 843 | |
d32f6947 ZR |
844 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
845 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 846 | kfree(obj); |
1a7c618a | 847 | return result; |
469778c1 JJ |
848 | |
849 | out_free_levels: | |
850 | kfree(br->levels); | |
851 | out_free: | |
852 | kfree(br); | |
853 | out: | |
854 | device->brightness = NULL; | |
855 | kfree(obj); | |
1a7c618a | 856 | return result; |
469778c1 JJ |
857 | } |
858 | ||
859 | /* | |
860 | * Arg: | |
861 | * device : video output device (LCD, CRT, ..) | |
862 | * | |
863 | * Return Value: | |
21fcb34e | 864 | * None |
1da177e4 | 865 | * |
98fb8fe1 | 866 | * Find out all required AML methods defined under the output |
1da177e4 LT |
867 | * device. |
868 | */ | |
869 | ||
4be44fcd | 870 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 871 | { |
952c63e9 | 872 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 873 | device->cap._ADR = 1; |
952c63e9 | 874 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 875 | device->cap._BCL = 1; |
952c63e9 | 876 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 877 | device->cap._BCM = 1; |
952c63e9 | 878 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 879 | device->cap._BQC = 1; |
952c63e9 | 880 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
881 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
882 | device->cap._BCQ = 1; | |
883 | } | |
884 | ||
952c63e9 | 885 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 886 | device->cap._DDC = 1; |
1da177e4 | 887 | |
8e5c2b77 | 888 | if (acpi_video_backlight_support()) { |
a19a6ee6 | 889 | struct backlight_properties props; |
9661e92c MG |
890 | struct pci_dev *pdev; |
891 | acpi_handle acpi_parent; | |
892 | struct device *parent = NULL; | |
702ed512 | 893 | int result; |
915ea7e4 | 894 | static int count; |
2f3d000a | 895 | char *name; |
1a7c618a | 896 | |
168cf0ec RW |
897 | result = acpi_video_init_brightness(device); |
898 | if (result) | |
899 | return; | |
aeb834d9 | 900 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
2f3d000a YL |
901 | if (!name) |
902 | return; | |
aeb834d9 | 903 | count++; |
2f3d000a | 904 | |
9661e92c MG |
905 | acpi_get_parent(device->dev->handle, &acpi_parent); |
906 | ||
907 | pdev = acpi_get_pci_dev(acpi_parent); | |
908 | if (pdev) { | |
909 | parent = &pdev->dev; | |
910 | pci_dev_put(pdev); | |
911 | } | |
912 | ||
a19a6ee6 | 913 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 914 | props.type = BACKLIGHT_FIRMWARE; |
a19a6ee6 | 915 | props.max_brightness = device->brightness->count - 3; |
9661e92c MG |
916 | device->backlight = backlight_device_register(name, |
917 | parent, | |
918 | device, | |
a19a6ee6 MG |
919 | &acpi_backlight_ops, |
920 | &props); | |
2f3d000a | 921 | kfree(name); |
e01ce79b ZR |
922 | if (IS_ERR(device->backlight)) |
923 | return; | |
702ed512 | 924 | |
ac7729da RW |
925 | /* |
926 | * Save current brightness level in case we have to restore it | |
927 | * before acpi_video_device_lcd_set_level() is called next time. | |
928 | */ | |
929 | device->backlight->props.brightness = | |
930 | acpi_video_get_brightness(device->backlight); | |
702ed512 | 931 | |
4a703a8f | 932 | device->cooling_dev = thermal_cooling_device_register("LCD", |
702ed512 | 933 | device->dev, &video_cooling_ops); |
4a703a8f | 934 | if (IS_ERR(device->cooling_dev)) { |
4b4fe3b6 | 935 | /* |
4a703a8f | 936 | * Set cooling_dev to NULL so we don't crash trying to |
4b4fe3b6 DT |
937 | * free it. |
938 | * Also, why the hell we are returning early and | |
939 | * not attempt to register video output if cooling | |
940 | * device registration failed? | |
941 | * -- dtor | |
942 | */ | |
4a703a8f | 943 | device->cooling_dev = NULL; |
43ff39f2 | 944 | return; |
4b4fe3b6 | 945 | } |
43ff39f2 | 946 | |
fc3a8828 | 947 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
4a703a8f | 948 | device->cooling_dev->id); |
9030062f | 949 | result = sysfs_create_link(&device->dev->dev.kobj, |
4a703a8f | 950 | &device->cooling_dev->device.kobj, |
9030062f JL |
951 | "thermal_cooling"); |
952 | if (result) | |
953 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
4a703a8f | 954 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
9030062f JL |
955 | &device->dev->dev.kobj, "device"); |
956 | if (result) | |
957 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
958 | ||
2f3d000a | 959 | } |
1da177e4 LT |
960 | } |
961 | ||
962 | /* | |
21fcb34e FC |
963 | * Arg: |
964 | * device : video output device (VGA) | |
1da177e4 LT |
965 | * |
966 | * Return Value: | |
21fcb34e | 967 | * None |
1da177e4 | 968 | * |
98fb8fe1 | 969 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
970 | */ |
971 | ||
4be44fcd | 972 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 973 | { |
952c63e9 | 974 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 975 | video->cap._DOS = 1; |
952c63e9 | 976 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 977 | video->cap._DOD = 1; |
952c63e9 | 978 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 979 | video->cap._ROM = 1; |
952c63e9 | 980 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 981 | video->cap._GPD = 1; |
952c63e9 | 982 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 983 | video->cap._SPD = 1; |
952c63e9 | 984 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 985 | video->cap._VPO = 1; |
1da177e4 LT |
986 | } |
987 | ||
988 | /* | |
989 | * Check whether the video bus device has required AML method to | |
990 | * support the desired features | |
991 | */ | |
992 | ||
4be44fcd | 993 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 994 | { |
4be44fcd | 995 | acpi_status status = -ENOENT; |
1e4cffe7 | 996 | struct pci_dev *dev; |
1da177e4 LT |
997 | |
998 | if (!video) | |
d550d98d | 999 | return -EINVAL; |
1da177e4 | 1000 | |
1e4cffe7 | 1001 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
1002 | if (!dev) |
1003 | return -ENODEV; | |
1e4cffe7 | 1004 | pci_dev_put(dev); |
22c13f9d | 1005 | |
21fcb34e FC |
1006 | /* |
1007 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
1008 | * to check well known required nodes. |
1009 | */ | |
1010 | ||
98fb8fe1 | 1011 | /* Does this device support video switching? */ |
3a1151e3 SB |
1012 | if (video->cap._DOS || video->cap._DOD) { |
1013 | if (!video->cap._DOS) { | |
1014 | printk(KERN_WARNING FW_BUG | |
1015 | "ACPI(%s) defines _DOD but not _DOS\n", | |
1016 | acpi_device_bid(video->device)); | |
1017 | } | |
1da177e4 LT |
1018 | video->flags.multihead = 1; |
1019 | status = 0; | |
1020 | } | |
1021 | ||
98fb8fe1 | 1022 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 1023 | if (video->cap._ROM) { |
1da177e4 LT |
1024 | video->flags.rom = 1; |
1025 | status = 0; | |
1026 | } | |
1027 | ||
98fb8fe1 | 1028 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 1029 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
1030 | video->flags.post = 1; |
1031 | status = 0; | |
1032 | } | |
1033 | ||
d550d98d | 1034 | return status; |
1da177e4 LT |
1035 | } |
1036 | ||
21fcb34e FC |
1037 | /* |
1038 | * -------------------------------------------------------------------------- | |
1039 | * Driver Interface | |
1040 | * -------------------------------------------------------------------------- | |
1041 | */ | |
1da177e4 LT |
1042 | |
1043 | /* device interface */ | |
915ea7e4 | 1044 | static struct acpi_video_device_attrib * |
82cae999 RZ |
1045 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
1046 | { | |
78eed028 DT |
1047 | struct acpi_video_enumerated_device *ids; |
1048 | int i; | |
1049 | ||
1050 | for (i = 0; i < video->attached_count; i++) { | |
1051 | ids = &video->attached_array[i]; | |
1052 | if ((ids->value.int_val & 0xffff) == device_id) | |
1053 | return &ids->value.attrib; | |
1054 | } | |
82cae999 | 1055 | |
82cae999 RZ |
1056 | return NULL; |
1057 | } | |
1da177e4 | 1058 | |
e92a7162 MG |
1059 | static int |
1060 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
1061 | unsigned long device_id) | |
1062 | { | |
1063 | struct acpi_video_enumerated_device *ids; | |
1064 | int i; | |
1065 | ||
1066 | for (i = 0; i < video->attached_count; i++) { | |
1067 | ids = &video->attached_array[i]; | |
1068 | if ((ids->value.int_val & 0xffff) == device_id) | |
1069 | return ids->value.int_val; | |
1070 | } | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1da177e4 | 1075 | static int |
4be44fcd LB |
1076 | acpi_video_bus_get_one_device(struct acpi_device *device, |
1077 | struct acpi_video_bus *video) | |
1da177e4 | 1078 | { |
27663c58 | 1079 | unsigned long long device_id; |
e92a7162 | 1080 | int status, device_type; |
4be44fcd | 1081 | struct acpi_video_device *data; |
915ea7e4 | 1082 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 1083 | |
4be44fcd LB |
1084 | status = |
1085 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
1086 | /* Some device omits _ADR, we skip them instead of fail */ |
1087 | if (ACPI_FAILURE(status)) | |
1088 | return 0; | |
1da177e4 | 1089 | |
91e13aa3 AL |
1090 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
1091 | if (!data) | |
1092 | return -ENOMEM; | |
82cae999 | 1093 | |
91e13aa3 AL |
1094 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
1095 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
1096 | device->driver_data = data; | |
1097 | ||
1098 | data->device_id = device_id; | |
1099 | data->video = video; | |
1100 | data->dev = device; | |
1101 | ||
1102 | attribute = acpi_video_get_device_attr(video, device_id); | |
1103 | ||
915ea7e4 | 1104 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
1105 | switch (attribute->display_type) { |
1106 | case ACPI_VIDEO_DISPLAY_CRT: | |
1107 | data->flags.crt = 1; | |
1108 | break; | |
1109 | case ACPI_VIDEO_DISPLAY_TV: | |
1110 | data->flags.tvout = 1; | |
1111 | break; | |
1112 | case ACPI_VIDEO_DISPLAY_DVI: | |
1113 | data->flags.dvi = 1; | |
1114 | break; | |
1115 | case ACPI_VIDEO_DISPLAY_LCD: | |
1116 | data->flags.lcd = 1; | |
1117 | break; | |
1118 | default: | |
1119 | data->flags.unknown = 1; | |
1120 | break; | |
1121 | } | |
915ea7e4 | 1122 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1123 | data->flags.bios = 1; |
1124 | } else { | |
1125 | /* Check for legacy IDs */ | |
1126 | device_type = acpi_video_get_device_type(video, device_id); | |
1127 | /* Ignore bits 16 and 18-20 */ | |
1128 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1129 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1130 | data->flags.crt = 1; | |
1131 | break; | |
1132 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1133 | data->flags.lcd = 1; | |
1134 | break; | |
1135 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1136 | data->flags.tvout = 1; | |
1137 | break; | |
1138 | default: | |
1139 | data->flags.unknown = 1; | |
e92a7162 | 1140 | } |
91e13aa3 | 1141 | } |
4be44fcd | 1142 | |
91e13aa3 AL |
1143 | acpi_video_device_bind(video, data); |
1144 | acpi_video_device_find_cap(data); | |
1da177e4 | 1145 | |
91e13aa3 AL |
1146 | status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
1147 | acpi_video_device_notify, data); | |
1148 | if (ACPI_FAILURE(status)) | |
1149 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1150 | else | |
1151 | data->flags.notify = 1; | |
1da177e4 | 1152 | |
91e13aa3 AL |
1153 | mutex_lock(&video->device_list_lock); |
1154 | list_add_tail(&data->entry, &video->video_device_list); | |
1155 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1156 | |
91e13aa3 | 1157 | return status; |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | /* | |
1161 | * Arg: | |
21fcb34e | 1162 | * video : video bus device |
1da177e4 LT |
1163 | * |
1164 | * Return: | |
21fcb34e FC |
1165 | * none |
1166 | * | |
1167 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1168 | * bind the ids with the corresponding video devices |
1169 | * under the video bus. | |
4be44fcd | 1170 | */ |
1da177e4 | 1171 | |
4be44fcd | 1172 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1173 | { |
ff102ea9 DT |
1174 | struct acpi_video_device *dev; |
1175 | ||
bbac81f5 | 1176 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1177 | |
1178 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1179 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1180 | |
bbac81f5 | 1181 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | /* | |
1185 | * Arg: | |
21fcb34e FC |
1186 | * video : video bus device |
1187 | * device : video output device under the video | |
1188 | * bus | |
1da177e4 LT |
1189 | * |
1190 | * Return: | |
21fcb34e FC |
1191 | * none |
1192 | * | |
1da177e4 LT |
1193 | * Bind the ids with the corresponding video devices |
1194 | * under the video bus. | |
4be44fcd | 1195 | */ |
1da177e4 LT |
1196 | |
1197 | static void | |
4be44fcd LB |
1198 | acpi_video_device_bind(struct acpi_video_bus *video, |
1199 | struct acpi_video_device *device) | |
1da177e4 | 1200 | { |
78eed028 | 1201 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1202 | int i; |
1da177e4 | 1203 | |
78eed028 DT |
1204 | for (i = 0; i < video->attached_count; i++) { |
1205 | ids = &video->attached_array[i]; | |
1206 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1207 | ids->bind_info = device; | |
1da177e4 LT |
1208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1209 | } | |
1210 | } | |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | /* | |
1214 | * Arg: | |
21fcb34e | 1215 | * video : video bus device |
1da177e4 LT |
1216 | * |
1217 | * Return: | |
21fcb34e FC |
1218 | * < 0 : error |
1219 | * | |
1da177e4 LT |
1220 | * Call _DOD to enumerate all devices attached to display adapter |
1221 | * | |
4be44fcd | 1222 | */ |
1da177e4 LT |
1223 | |
1224 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1225 | { | |
4be44fcd LB |
1226 | int status; |
1227 | int count; | |
1228 | int i; | |
78eed028 | 1229 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1230 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1231 | union acpi_object *dod = NULL; | |
1232 | union acpi_object *obj; | |
1da177e4 | 1233 | |
90130268 | 1234 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1235 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1236 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1237 | return status; |
1da177e4 LT |
1238 | } |
1239 | ||
50dd0969 | 1240 | dod = buffer.pointer; |
1da177e4 | 1241 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1242 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1243 | status = -EFAULT; |
1244 | goto out; | |
1245 | } | |
1246 | ||
1247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1248 | dod->package.count)); |
1da177e4 | 1249 | |
78eed028 DT |
1250 | active_list = kcalloc(1 + dod->package.count, |
1251 | sizeof(struct acpi_video_enumerated_device), | |
1252 | GFP_KERNEL); | |
1253 | if (!active_list) { | |
1da177e4 LT |
1254 | status = -ENOMEM; |
1255 | goto out; | |
1256 | } | |
1257 | ||
1258 | count = 0; | |
1259 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1260 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1261 | |
1262 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1263 | printk(KERN_ERR PREFIX |
1264 | "Invalid _DOD data in element %d\n", i); | |
1265 | continue; | |
1da177e4 | 1266 | } |
78eed028 DT |
1267 | |
1268 | active_list[count].value.int_val = obj->integer.value; | |
1269 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1270 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1271 | (int)obj->integer.value)); | |
1da177e4 LT |
1272 | count++; |
1273 | } | |
1da177e4 | 1274 | |
6044ec88 | 1275 | kfree(video->attached_array); |
4be44fcd | 1276 | |
78eed028 | 1277 | video->attached_array = active_list; |
1da177e4 | 1278 | video->attached_count = count; |
78eed028 | 1279 | |
915ea7e4 | 1280 | out: |
02438d87 | 1281 | kfree(buffer.pointer); |
d550d98d | 1282 | return status; |
1da177e4 LT |
1283 | } |
1284 | ||
4be44fcd LB |
1285 | static int |
1286 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1287 | u32 level_current, u32 event) | |
1da177e4 | 1288 | { |
63f0edfc | 1289 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1290 | max = max_below = 0; |
1291 | min = min_above = 255; | |
63f0edfc | 1292 | /* Find closest level to level_current */ |
0a3db1ce | 1293 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1294 | l = device->brightness->levels[i]; |
1295 | if (abs(l - level_current) < abs(delta)) { | |
1296 | delta = l - level_current; | |
1297 | if (!delta) | |
1298 | break; | |
1299 | } | |
1300 | } | |
1301 | /* Ajust level_current to closest available level */ | |
1302 | level_current += delta; | |
0a3db1ce | 1303 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1304 | l = device->brightness->levels[i]; |
1305 | if (l < min) | |
1306 | min = l; | |
1307 | if (l > max) | |
1308 | max = l; | |
1309 | if (l < min_above && l > level_current) | |
1310 | min_above = l; | |
1311 | if (l > max_below && l < level_current) | |
1312 | max_below = l; | |
1313 | } | |
1314 | ||
1315 | switch (event) { | |
1316 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1317 | return (level_current < max) ? min_above : min; | |
1318 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1319 | return (level_current < max) ? min_above : max; | |
1320 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1321 | return (level_current > min) ? max_below : min; | |
1322 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1323 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1324 | return 0; | |
1325 | default: | |
1326 | return level_current; | |
1327 | } | |
1da177e4 LT |
1328 | } |
1329 | ||
c8890f90 | 1330 | static int |
4be44fcd | 1331 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1332 | { |
27663c58 | 1333 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1334 | int result = -EINVAL; |
1335 | ||
8e5c2b77 RW |
1336 | /* no warning message if acpi_backlight=vendor is used */ |
1337 | if (!acpi_video_backlight_support()) | |
28c32e99 ZR |
1338 | return 0; |
1339 | ||
469778c1 | 1340 | if (!device->brightness) |
c8890f90 ZR |
1341 | goto out; |
1342 | ||
1343 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1344 | &level_current, |
1345 | false); | |
c8890f90 ZR |
1346 | if (result) |
1347 | goto out; | |
1348 | ||
1da177e4 | 1349 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1350 | |
24450c7a | 1351 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1352 | |
36342742 MG |
1353 | if (!result) |
1354 | backlight_force_update(device->backlight, | |
1355 | BACKLIGHT_UPDATE_HOTKEY); | |
1356 | ||
c8890f90 ZR |
1357 | out: |
1358 | if (result) | |
1359 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1360 | ||
1361 | return result; | |
1da177e4 LT |
1362 | } |
1363 | ||
e92a7162 MG |
1364 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1365 | void **edid) | |
1366 | { | |
1367 | struct acpi_video_bus *video; | |
1368 | struct acpi_video_device *video_device; | |
1369 | union acpi_object *buffer = NULL; | |
1370 | acpi_status status; | |
1371 | int i, length; | |
1372 | ||
1373 | if (!device || !acpi_driver_data(device)) | |
1374 | return -EINVAL; | |
1375 | ||
1376 | video = acpi_driver_data(device); | |
1377 | ||
1378 | for (i = 0; i < video->attached_count; i++) { | |
1379 | video_device = video->attached_array[i].bind_info; | |
1380 | length = 256; | |
1381 | ||
1382 | if (!video_device) | |
1383 | continue; | |
1384 | ||
82069552 ZR |
1385 | if (!video_device->cap._DDC) |
1386 | continue; | |
1387 | ||
e92a7162 MG |
1388 | if (type) { |
1389 | switch (type) { | |
1390 | case ACPI_VIDEO_DISPLAY_CRT: | |
1391 | if (!video_device->flags.crt) | |
1392 | continue; | |
1393 | break; | |
1394 | case ACPI_VIDEO_DISPLAY_TV: | |
1395 | if (!video_device->flags.tvout) | |
1396 | continue; | |
1397 | break; | |
1398 | case ACPI_VIDEO_DISPLAY_DVI: | |
1399 | if (!video_device->flags.dvi) | |
1400 | continue; | |
1401 | break; | |
1402 | case ACPI_VIDEO_DISPLAY_LCD: | |
1403 | if (!video_device->flags.lcd) | |
1404 | continue; | |
1405 | break; | |
1406 | } | |
1407 | } else if (video_device->device_id != device_id) { | |
1408 | continue; | |
1409 | } | |
1410 | ||
1411 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1412 | ||
1413 | if (ACPI_FAILURE(status) || !buffer || | |
1414 | buffer->type != ACPI_TYPE_BUFFER) { | |
1415 | length = 128; | |
1416 | status = acpi_video_device_EDID(video_device, &buffer, | |
1417 | length); | |
1418 | if (ACPI_FAILURE(status) || !buffer || | |
1419 | buffer->type != ACPI_TYPE_BUFFER) { | |
1420 | continue; | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | *edid = buffer->buffer.pointer; | |
1425 | return length; | |
1426 | } | |
1427 | ||
1428 | return -ENODEV; | |
1429 | } | |
1430 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1431 | ||
1da177e4 | 1432 | static int |
4be44fcd LB |
1433 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1434 | struct acpi_device *device) | |
1da177e4 | 1435 | { |
fba4e087 | 1436 | int status = 0; |
ff102ea9 | 1437 | struct acpi_device *dev; |
1da177e4 | 1438 | |
fba4e087 IM |
1439 | /* |
1440 | * There are systems where video module known to work fine regardless | |
1441 | * of broken _DOD and ignoring returned value here doesn't cause | |
1442 | * any issues later. | |
1443 | */ | |
1444 | acpi_video_device_enumerate(video); | |
1da177e4 | 1445 | |
ff102ea9 | 1446 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1447 | |
1448 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1449 | if (status) { |
91e13aa3 AL |
1450 | dev_err(&dev->dev, "Can't attach device\n"); |
1451 | break; | |
1da177e4 | 1452 | } |
1da177e4 | 1453 | } |
d550d98d | 1454 | return status; |
1da177e4 LT |
1455 | } |
1456 | ||
4be44fcd | 1457 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
1da177e4 | 1458 | { |
031ec77b | 1459 | acpi_status status; |
1da177e4 LT |
1460 | |
1461 | if (!device || !device->video) | |
d550d98d | 1462 | return -ENOENT; |
1da177e4 | 1463 | |
91e13aa3 AL |
1464 | if (device->flags.notify) { |
1465 | status = acpi_remove_notify_handler(device->dev->handle, | |
1466 | ACPI_DEVICE_NOTIFY, acpi_video_device_notify); | |
1467 | if (ACPI_FAILURE(status)) | |
1468 | dev_err(&device->dev->dev, | |
1469 | "Can't remove video notify handler\n"); | |
cfa806f0 | 1470 | } |
91e13aa3 | 1471 | |
e29b3ee3 | 1472 | if (device->backlight) { |
e29b3ee3 KP |
1473 | backlight_device_unregister(device->backlight); |
1474 | device->backlight = NULL; | |
1475 | } | |
4a703a8f | 1476 | if (device->cooling_dev) { |
702ed512 ZR |
1477 | sysfs_remove_link(&device->dev->dev.kobj, |
1478 | "thermal_cooling"); | |
4a703a8f | 1479 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
702ed512 | 1480 | "device"); |
4a703a8f DT |
1481 | thermal_cooling_device_unregister(device->cooling_dev); |
1482 | device->cooling_dev = NULL; | |
702ed512 | 1483 | } |
ff102ea9 | 1484 | |
d550d98d | 1485 | return 0; |
1da177e4 LT |
1486 | } |
1487 | ||
4be44fcd | 1488 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
1da177e4 | 1489 | { |
4be44fcd | 1490 | int status; |
ff102ea9 | 1491 | struct acpi_video_device *dev, *next; |
1da177e4 | 1492 | |
bbac81f5 | 1493 | mutex_lock(&video->device_list_lock); |
1da177e4 | 1494 | |
ff102ea9 | 1495 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
1da177e4 | 1496 | |
ff102ea9 | 1497 | status = acpi_video_bus_put_one_device(dev); |
4be44fcd LB |
1498 | if (ACPI_FAILURE(status)) |
1499 | printk(KERN_WARNING PREFIX | |
1500 | "hhuuhhuu bug in acpi video driver.\n"); | |
1da177e4 | 1501 | |
ff102ea9 DT |
1502 | if (dev->brightness) { |
1503 | kfree(dev->brightness->levels); | |
1504 | kfree(dev->brightness); | |
1505 | } | |
1506 | list_del(&dev->entry); | |
1507 | kfree(dev); | |
1da177e4 LT |
1508 | } |
1509 | ||
bbac81f5 | 1510 | mutex_unlock(&video->device_list_lock); |
ff102ea9 | 1511 | |
d550d98d | 1512 | return 0; |
1da177e4 LT |
1513 | } |
1514 | ||
1515 | /* acpi_video interface */ | |
1516 | ||
efaa14c7 AL |
1517 | /* |
1518 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1519 | * preform any automatic brightness change on receiving a notification. | |
1520 | */ | |
4be44fcd | 1521 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1522 | { |
efaa14c7 AL |
1523 | return acpi_video_bus_DOS(video, 0, |
1524 | acpi_video_backlight_quirks() ? 1 : 0); | |
1da177e4 LT |
1525 | } |
1526 | ||
4be44fcd | 1527 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1528 | { |
efaa14c7 AL |
1529 | return acpi_video_bus_DOS(video, 0, |
1530 | acpi_video_backlight_quirks() ? 0 : 1); | |
1da177e4 LT |
1531 | } |
1532 | ||
7015558f | 1533 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1534 | { |
7015558f | 1535 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1536 | struct input_dev *input; |
17c452f9 | 1537 | int keycode = 0; |
e9dab196 | 1538 | |
1da177e4 | 1539 | if (!video) |
d550d98d | 1540 | return; |
1da177e4 | 1541 | |
e9dab196 | 1542 | input = video->input; |
1da177e4 LT |
1543 | |
1544 | switch (event) { | |
98fb8fe1 | 1545 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1546 | * most likely via hotkey. */ |
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); | |
e9dab196 | 1554 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1555 | break; |
1556 | ||
4be44fcd | 1557 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1558 | keycode = KEY_SWITCHVIDEOMODE; |
1559 | break; | |
4be44fcd | 1560 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1561 | keycode = KEY_VIDEO_NEXT; |
1562 | break; | |
4be44fcd | 1563 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1564 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1565 | break; |
1566 | ||
1567 | default: | |
1568 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1569 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1570 | break; |
1571 | } | |
1572 | ||
8a37c65d LT |
1573 | if (acpi_notifier_call_chain(device, event, 0)) |
1574 | /* Something vetoed the keypress. */ | |
1575 | keycode = 0; | |
17c452f9 MG |
1576 | |
1577 | if (keycode) { | |
1578 | input_report_key(input, keycode, 1); | |
1579 | input_sync(input); | |
1580 | input_report_key(input, keycode, 0); | |
1581 | input_sync(input); | |
1582 | } | |
e9dab196 | 1583 | |
d550d98d | 1584 | return; |
1da177e4 LT |
1585 | } |
1586 | ||
4be44fcd | 1587 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1588 | { |
50dd0969 | 1589 | struct acpi_video_device *video_device = data; |
4be44fcd | 1590 | struct acpi_device *device = NULL; |
e9dab196 LY |
1591 | struct acpi_video_bus *bus; |
1592 | struct input_dev *input; | |
17c452f9 | 1593 | int keycode = 0; |
1da177e4 | 1594 | |
1da177e4 | 1595 | if (!video_device) |
d550d98d | 1596 | return; |
1da177e4 | 1597 | |
e6afa0de | 1598 | device = video_device->dev; |
e9dab196 LY |
1599 | bus = video_device->video; |
1600 | input = bus->input; | |
1da177e4 LT |
1601 | |
1602 | switch (event) { | |
4be44fcd | 1603 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1604 | if (brightness_switch_enabled) |
1605 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1606 | keycode = KEY_BRIGHTNESS_CYCLE; |
1607 | break; | |
4be44fcd | 1608 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1609 | if (brightness_switch_enabled) |
1610 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1611 | keycode = KEY_BRIGHTNESSUP; |
1612 | break; | |
4be44fcd | 1613 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1614 | if (brightness_switch_enabled) |
1615 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1616 | keycode = KEY_BRIGHTNESSDOWN; |
1617 | break; | |
70f23fd6 | 1618 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1619 | if (brightness_switch_enabled) |
1620 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1621 | keycode = KEY_BRIGHTNESS_ZERO; |
1622 | break; | |
4be44fcd | 1623 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1624 | if (brightness_switch_enabled) |
1625 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1626 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1627 | break; |
1628 | default: | |
1629 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1630 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1631 | break; |
1632 | } | |
e9dab196 | 1633 | |
7761f638 | 1634 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1635 | |
1636 | if (keycode) { | |
1637 | input_report_key(input, keycode, 1); | |
1638 | input_sync(input); | |
1639 | input_report_key(input, keycode, 0); | |
1640 | input_sync(input); | |
1641 | } | |
e9dab196 | 1642 | |
d550d98d | 1643 | return; |
1da177e4 LT |
1644 | } |
1645 | ||
ac7729da RW |
1646 | static int acpi_video_resume(struct notifier_block *nb, |
1647 | unsigned long val, void *ign) | |
863c1490 MG |
1648 | { |
1649 | struct acpi_video_bus *video; | |
1650 | struct acpi_video_device *video_device; | |
1651 | int i; | |
1652 | ||
ac7729da RW |
1653 | switch (val) { |
1654 | case PM_HIBERNATION_PREPARE: | |
1655 | case PM_SUSPEND_PREPARE: | |
1656 | case PM_RESTORE_PREPARE: | |
1657 | return NOTIFY_DONE; | |
1658 | } | |
863c1490 | 1659 | |
ac7729da RW |
1660 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1661 | ||
1662 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1663 | |
1664 | for (i = 0; i < video->attached_count; i++) { | |
1665 | video_device = video->attached_array[i].bind_info; | |
1666 | if (video_device && video_device->backlight) | |
1667 | acpi_video_set_brightness(video_device->backlight); | |
1668 | } | |
ac7729da RW |
1669 | |
1670 | return NOTIFY_OK; | |
863c1490 MG |
1671 | } |
1672 | ||
c504f8cb ZR |
1673 | static acpi_status |
1674 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1675 | void **return_value) | |
1676 | { | |
1677 | struct acpi_device *device = context; | |
1678 | struct acpi_device *sibling; | |
1679 | int result; | |
1680 | ||
1681 | if (handle == device->handle) | |
1682 | return AE_CTRL_TERMINATE; | |
1683 | ||
1684 | result = acpi_bus_get_device(handle, &sibling); | |
1685 | if (result) | |
1686 | return AE_OK; | |
1687 | ||
1688 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1689 | return AE_ALREADY_EXISTS; | |
1690 | ||
1691 | return AE_OK; | |
1692 | } | |
1693 | ||
ac7729da RW |
1694 | static int instance; |
1695 | ||
4be44fcd | 1696 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1697 | { |
f51e8391 | 1698 | struct acpi_video_bus *video; |
e9dab196 | 1699 | struct input_dev *input; |
f51e8391 | 1700 | int error; |
c504f8cb ZR |
1701 | acpi_status status; |
1702 | ||
1703 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1704 | device->parent->handle, 1, | |
1705 | acpi_video_bus_match, NULL, | |
1706 | device, NULL); | |
1707 | if (status == AE_ALREADY_EXISTS) { | |
1708 | printk(KERN_WARNING FW_BUG | |
1709 | "Duplicate ACPI video bus devices for the" | |
1710 | " same VGA controller, please try module " | |
1711 | "parameter \"video.allow_duplicates=1\"" | |
1712 | "if the current driver doesn't work.\n"); | |
1713 | if (!allow_duplicates) | |
1714 | return -ENODEV; | |
1715 | } | |
1da177e4 | 1716 | |
36bcbec7 | 1717 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1718 | if (!video) |
d550d98d | 1719 | return -ENOMEM; |
1da177e4 | 1720 | |
e6d9da1d ZR |
1721 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1722 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1723 | if (instance) | |
1724 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1725 | instance++; |
e6d9da1d | 1726 | } |
f3b39f13 ZY |
1727 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1728 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1729 | if (instance) | |
1730 | device->pnp.bus_id[3] = '0' + instance; | |
1731 | instance++; | |
1732 | } | |
e6d9da1d | 1733 | |
e6afa0de | 1734 | video->device = device; |
1da177e4 LT |
1735 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1736 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1737 | device->driver_data = video; |
1da177e4 LT |
1738 | |
1739 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1740 | error = acpi_video_bus_check(video); |
1741 | if (error) | |
1742 | goto err_free_video; | |
1da177e4 | 1743 | |
bbac81f5 | 1744 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1745 | INIT_LIST_HEAD(&video->video_device_list); |
1746 | ||
ea9f8856 IM |
1747 | error = acpi_video_bus_get_devices(video, device); |
1748 | if (error) | |
91e13aa3 | 1749 | goto err_put_video; |
1da177e4 | 1750 | |
e9dab196 | 1751 | video->input = input = input_allocate_device(); |
f51e8391 DT |
1752 | if (!input) { |
1753 | error = -ENOMEM; | |
b60e7f61 | 1754 | goto err_put_video; |
f51e8391 | 1755 | } |
e9dab196 | 1756 | |
b60e7f61 IM |
1757 | error = acpi_video_bus_start_devices(video); |
1758 | if (error) | |
1759 | goto err_free_input_dev; | |
1760 | ||
e9dab196 LY |
1761 | snprintf(video->phys, sizeof(video->phys), |
1762 | "%s/video/input0", acpi_device_hid(video->device)); | |
1763 | ||
1764 | input->name = acpi_device_name(video->device); | |
1765 | input->phys = video->phys; | |
1766 | input->id.bustype = BUS_HOST; | |
1767 | input->id.product = 0x06; | |
91c05c66 | 1768 | input->dev.parent = &device->dev; |
e9dab196 LY |
1769 | input->evbit[0] = BIT(EV_KEY); |
1770 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1771 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1772 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1773 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1774 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1775 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1776 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1777 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
e9dab196 | 1778 | |
1da177e4 | 1779 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1780 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1781 | video->flags.multihead ? "yes" : "no", | |
1782 | video->flags.rom ? "yes" : "no", | |
1783 | video->flags.post ? "yes" : "no"); | |
1da177e4 | 1784 | |
ac7729da RW |
1785 | video->pm_nb.notifier_call = acpi_video_resume; |
1786 | video->pm_nb.priority = 0; | |
ea9f8856 IM |
1787 | error = register_pm_notifier(&video->pm_nb); |
1788 | if (error) | |
301f33fb DC |
1789 | goto err_stop_video; |
1790 | ||
1791 | error = input_register_device(input); | |
1792 | if (error) | |
1793 | goto err_unregister_pm_notifier; | |
ac7729da | 1794 | |
f51e8391 DT |
1795 | return 0; |
1796 | ||
301f33fb DC |
1797 | err_unregister_pm_notifier: |
1798 | unregister_pm_notifier(&video->pm_nb); | |
f51e8391 DT |
1799 | err_stop_video: |
1800 | acpi_video_bus_stop_devices(video); | |
b60e7f61 IM |
1801 | err_free_input_dev: |
1802 | input_free_device(input); | |
ea9f8856 | 1803 | err_put_video: |
f51e8391 DT |
1804 | acpi_video_bus_put_devices(video); |
1805 | kfree(video->attached_array); | |
f51e8391 DT |
1806 | err_free_video: |
1807 | kfree(video); | |
db89b4f0 | 1808 | device->driver_data = NULL; |
1da177e4 | 1809 | |
f51e8391 | 1810 | return error; |
1da177e4 LT |
1811 | } |
1812 | ||
51fac838 | 1813 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1814 | { |
4be44fcd | 1815 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1816 | |
1da177e4 LT |
1817 | |
1818 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1819 | return -EINVAL; |
1da177e4 | 1820 | |
50dd0969 | 1821 | video = acpi_driver_data(device); |
1da177e4 | 1822 | |
ac7729da RW |
1823 | unregister_pm_notifier(&video->pm_nb); |
1824 | ||
1da177e4 | 1825 | acpi_video_bus_stop_devices(video); |
1da177e4 | 1826 | acpi_video_bus_put_devices(video); |
1da177e4 | 1827 | |
e9dab196 | 1828 | input_unregister_device(video->input); |
6044ec88 | 1829 | kfree(video->attached_array); |
1da177e4 LT |
1830 | kfree(video); |
1831 | ||
d550d98d | 1832 | return 0; |
1da177e4 LT |
1833 | } |
1834 | ||
c6996bdd AC |
1835 | static int __init is_i740(struct pci_dev *dev) |
1836 | { | |
1837 | if (dev->device == 0x00D1) | |
1838 | return 1; | |
1839 | if (dev->device == 0x7000) | |
1840 | return 1; | |
1841 | return 0; | |
1842 | } | |
1843 | ||
74a365b3 MG |
1844 | static int __init intel_opregion_present(void) |
1845 | { | |
c6996bdd | 1846 | int opregion = 0; |
74a365b3 MG |
1847 | struct pci_dev *dev = NULL; |
1848 | u32 address; | |
1849 | ||
1850 | for_each_pci_dev(dev) { | |
1851 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1852 | continue; | |
1853 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1854 | continue; | |
c6996bdd AC |
1855 | /* We don't want to poke around undefined i740 registers */ |
1856 | if (is_i740(dev)) | |
1857 | continue; | |
74a365b3 MG |
1858 | pci_read_config_dword(dev, 0xfc, &address); |
1859 | if (!address) | |
1860 | continue; | |
c6996bdd | 1861 | opregion = 1; |
74a365b3 | 1862 | } |
c6996bdd | 1863 | return opregion; |
74a365b3 MG |
1864 | } |
1865 | ||
8e5c2b77 | 1866 | int acpi_video_register(void) |
1da177e4 | 1867 | { |
8e5c2b77 | 1868 | int result = 0; |
86e437f0 ZY |
1869 | if (register_count) { |
1870 | /* | |
8e5c2b77 RW |
1871 | * if the function of acpi_video_register is already called, |
1872 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1873 | */ |
1874 | return 0; | |
1875 | } | |
1da177e4 | 1876 | |
1da177e4 | 1877 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1878 | if (result < 0) |
d550d98d | 1879 | return -ENODEV; |
1da177e4 | 1880 | |
86e437f0 ZY |
1881 | /* |
1882 | * When the acpi_video_bus is loaded successfully, increase | |
1883 | * the counter reference. | |
1884 | */ | |
1885 | register_count = 1; | |
1886 | ||
d550d98d | 1887 | return 0; |
1da177e4 | 1888 | } |
8e5c2b77 | 1889 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1890 | |
86e437f0 ZY |
1891 | void acpi_video_unregister(void) |
1892 | { | |
1893 | if (!register_count) { | |
1894 | /* | |
1895 | * If the acpi video bus is already unloaded, don't | |
1896 | * unload it again and return directly. | |
1897 | */ | |
1898 | return; | |
1899 | } | |
1900 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1901 | ||
86e437f0 ZY |
1902 | register_count = 0; |
1903 | ||
1904 | return; | |
1905 | } | |
1906 | EXPORT_SYMBOL(acpi_video_unregister); | |
1907 | ||
74a365b3 MG |
1908 | /* |
1909 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1910 | * the video opregion code to be run first in order to initialise | |
1911 | * state before any ACPI video calls are made. To handle this we defer | |
1912 | * registration of the video class until the opregion code has run. | |
1913 | */ | |
1914 | ||
1915 | static int __init acpi_video_init(void) | |
1916 | { | |
45cb50e6 ZR |
1917 | dmi_check_system(video_dmi_table); |
1918 | ||
74a365b3 MG |
1919 | if (intel_opregion_present()) |
1920 | return 0; | |
1921 | ||
1922 | return acpi_video_register(); | |
1923 | } | |
1da177e4 | 1924 | |
86e437f0 | 1925 | static void __exit acpi_video_exit(void) |
1da177e4 | 1926 | { |
86e437f0 | 1927 | acpi_video_unregister(); |
1da177e4 | 1928 | |
d550d98d | 1929 | return; |
1da177e4 LT |
1930 | } |
1931 | ||
1932 | module_init(acpi_video_init); | |
1933 | module_exit(acpi_video_exit); |