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> |
eb27cae8 | 40 | #include <linux/dmi.h> |
ac7729da | 41 | #include <linux/suspend.h> |
8b48463f | 42 | #include <linux/acpi.h> |
e92a7162 | 43 | #include <acpi/video.h> |
8b48463f | 44 | #include <asm/uaccess.h> |
1da177e4 | 45 | |
8c5bd7ad RW |
46 | #include "internal.h" |
47 | ||
a192a958 LB |
48 | #define PREFIX "ACPI: " |
49 | ||
1da177e4 LT |
50 | #define ACPI_VIDEO_BUS_NAME "Video Bus" |
51 | #define ACPI_VIDEO_DEVICE_NAME "Video Device" | |
52 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 | |
53 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 | |
54 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 | |
55 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 | |
56 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 | |
57 | ||
f4715189 TT |
58 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
59 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 | |
60 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 | |
61 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 | |
62 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 | |
1da177e4 | 63 | |
2f3d000a | 64 | #define MAX_NAME_LEN 20 |
1da177e4 | 65 | |
1da177e4 | 66 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
f52fd66d | 67 | ACPI_MODULE_NAME("video"); |
1da177e4 | 68 | |
f52fd66d | 69 | MODULE_AUTHOR("Bruno Ducrot"); |
7cda93e0 | 70 | MODULE_DESCRIPTION("ACPI Video Driver"); |
1da177e4 LT |
71 | MODULE_LICENSE("GPL"); |
72 | ||
90ab5ee9 | 73 | static bool brightness_switch_enabled = 1; |
8a681a4d ZR |
74 | module_param(brightness_switch_enabled, bool, 0644); |
75 | ||
c504f8cb ZR |
76 | /* |
77 | * By default, we don't allow duplicate ACPI video bus devices | |
78 | * under the same VGA controller | |
79 | */ | |
90ab5ee9 | 80 | static bool allow_duplicates; |
c504f8cb ZR |
81 | module_param(allow_duplicates, bool, 0644); |
82 | ||
fbc9fe1b AL |
83 | /* |
84 | * For Windows 8 systems: if set ture and the GPU driver has | |
85 | * registered a backlight interface, skip registering ACPI video's. | |
86 | */ | |
87 | static bool use_native_backlight = false; | |
88 | module_param(use_native_backlight, bool, 0644); | |
89 | ||
915ea7e4 | 90 | static int register_count; |
67b662e1 AL |
91 | static struct mutex video_list_lock; |
92 | static struct list_head video_bus_head; | |
4be44fcd | 93 | static int acpi_video_bus_add(struct acpi_device *device); |
51fac838 | 94 | static int acpi_video_bus_remove(struct acpi_device *device); |
7015558f | 95 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
1da177e4 | 96 | |
1ba90e3a TR |
97 | static const struct acpi_device_id video_device_ids[] = { |
98 | {ACPI_VIDEO_HID, 0}, | |
99 | {"", 0}, | |
100 | }; | |
101 | MODULE_DEVICE_TABLE(acpi, video_device_ids); | |
102 | ||
1da177e4 | 103 | static struct acpi_driver acpi_video_bus = { |
c2b6705b | 104 | .name = "video", |
1da177e4 | 105 | .class = ACPI_VIDEO_CLASS, |
1ba90e3a | 106 | .ids = video_device_ids, |
1da177e4 LT |
107 | .ops = { |
108 | .add = acpi_video_bus_add, | |
109 | .remove = acpi_video_bus_remove, | |
7015558f | 110 | .notify = acpi_video_bus_notify, |
4be44fcd | 111 | }, |
1da177e4 LT |
112 | }; |
113 | ||
114 | struct acpi_video_bus_flags { | |
4be44fcd LB |
115 | u8 multihead:1; /* can switch video heads */ |
116 | u8 rom:1; /* can retrieve a video rom */ | |
117 | u8 post:1; /* can configure the head to */ | |
118 | u8 reserved:5; | |
1da177e4 LT |
119 | }; |
120 | ||
121 | struct acpi_video_bus_cap { | |
21fcb34e FC |
122 | u8 _DOS:1; /* Enable/Disable output switching */ |
123 | u8 _DOD:1; /* Enumerate all devices attached to display adapter */ | |
124 | u8 _ROM:1; /* Get ROM Data */ | |
125 | u8 _GPD:1; /* Get POST Device */ | |
126 | u8 _SPD:1; /* Set POST Device */ | |
127 | u8 _VPO:1; /* Video POST Options */ | |
4be44fcd | 128 | u8 reserved:2; |
1da177e4 LT |
129 | }; |
130 | ||
4be44fcd LB |
131 | struct acpi_video_device_attrib { |
132 | u32 display_index:4; /* A zero-based instance of the Display */ | |
21fcb34e FC |
133 | u32 display_port_attachment:4; /* This field differentiates the display type */ |
134 | u32 display_type:4; /* Describe the specific type in use */ | |
135 | u32 vendor_specific:4; /* Chipset Vendor Specific */ | |
136 | u32 bios_can_detect:1; /* BIOS can detect the device */ | |
137 | u32 depend_on_vga:1; /* Non-VGA output device whose power is related to | |
4be44fcd | 138 | the VGA device. */ |
21fcb34e FC |
139 | u32 pipe_id:3; /* For VGA multiple-head devices. */ |
140 | u32 reserved:10; /* Must be 0 */ | |
141 | u32 device_id_scheme:1; /* Device ID Scheme */ | |
1da177e4 LT |
142 | }; |
143 | ||
144 | struct acpi_video_enumerated_device { | |
145 | union { | |
146 | u32 int_val; | |
4be44fcd | 147 | struct acpi_video_device_attrib attrib; |
1da177e4 LT |
148 | } value; |
149 | struct acpi_video_device *bind_info; | |
150 | }; | |
151 | ||
152 | struct acpi_video_bus { | |
e6afa0de | 153 | struct acpi_device *device; |
4be44fcd | 154 | u8 dos_setting; |
1da177e4 | 155 | struct acpi_video_enumerated_device *attached_array; |
4be44fcd LB |
156 | u8 attached_count; |
157 | struct acpi_video_bus_cap cap; | |
1da177e4 | 158 | struct acpi_video_bus_flags flags; |
4be44fcd | 159 | struct list_head video_device_list; |
bbac81f5 | 160 | struct mutex device_list_lock; /* protects video_device_list */ |
67b662e1 | 161 | struct list_head entry; |
e9dab196 LY |
162 | struct input_dev *input; |
163 | char phys[32]; /* for input device */ | |
ac7729da | 164 | struct notifier_block pm_nb; |
1da177e4 LT |
165 | }; |
166 | ||
167 | struct acpi_video_device_flags { | |
4be44fcd LB |
168 | u8 crt:1; |
169 | u8 lcd:1; | |
170 | u8 tvout:1; | |
82cae999 | 171 | u8 dvi:1; |
4be44fcd LB |
172 | u8 bios:1; |
173 | u8 unknown:1; | |
91e13aa3 AL |
174 | u8 notify:1; |
175 | u8 reserved:1; | |
1da177e4 LT |
176 | }; |
177 | ||
178 | struct acpi_video_device_cap { | |
21fcb34e FC |
179 | u8 _ADR:1; /* Return the unique ID */ |
180 | u8 _BCL:1; /* Query list of brightness control levels supported */ | |
181 | u8 _BCM:1; /* Set the brightness level */ | |
2f3d000a | 182 | u8 _BQC:1; /* Get current brightness level */ |
c60d638e | 183 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
21fcb34e | 184 | u8 _DDC:1; /* Return the EDID for this device */ |
1da177e4 LT |
185 | }; |
186 | ||
d32f6947 ZR |
187 | struct acpi_video_brightness_flags { |
188 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ | |
21fcb34e | 189 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
1a7c618a | 190 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
d32f6947 ZR |
191 | }; |
192 | ||
1da177e4 | 193 | struct acpi_video_device_brightness { |
4be44fcd LB |
194 | int curr; |
195 | int count; | |
196 | int *levels; | |
d32f6947 | 197 | struct acpi_video_brightness_flags flags; |
1da177e4 LT |
198 | }; |
199 | ||
200 | struct acpi_video_device { | |
4be44fcd LB |
201 | unsigned long device_id; |
202 | struct acpi_video_device_flags flags; | |
203 | struct acpi_video_device_cap cap; | |
204 | struct list_head entry; | |
205 | struct acpi_video_bus *video; | |
206 | struct acpi_device *dev; | |
1da177e4 | 207 | struct acpi_video_device_brightness *brightness; |
2f3d000a | 208 | struct backlight_device *backlight; |
4a703a8f | 209 | struct thermal_cooling_device *cooling_dev; |
1da177e4 LT |
210 | }; |
211 | ||
b7171ae7 | 212 | static const char device_decode[][30] = { |
1da177e4 LT |
213 | "motherboard VGA device", |
214 | "PCI VGA device", | |
215 | "AGP VGA device", | |
216 | "UNKNOWN", | |
217 | }; | |
218 | ||
4be44fcd LB |
219 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data); |
220 | static void acpi_video_device_rebind(struct acpi_video_bus *video); | |
221 | static void acpi_video_device_bind(struct acpi_video_bus *video, | |
222 | struct acpi_video_device *device); | |
1da177e4 | 223 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
2f3d000a YL |
224 | static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, |
225 | int level); | |
226 | static int acpi_video_device_lcd_get_level_current( | |
227 | struct acpi_video_device *device, | |
a89803df | 228 | unsigned long long *level, bool raw); |
4be44fcd LB |
229 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
230 | u32 level_current, u32 event); | |
c8890f90 | 231 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
4be44fcd | 232 | int event); |
1da177e4 | 233 | |
fbc9fe1b AL |
234 | static bool acpi_video_verify_backlight_support(void) |
235 | { | |
236 | if (acpi_osi_is_win8() && use_native_backlight && | |
237 | backlight_device_registered(BACKLIGHT_RAW)) | |
238 | return false; | |
239 | return acpi_video_backlight_support(); | |
240 | } | |
241 | ||
21fcb34e | 242 | /* backlight device sysfs support */ |
2f3d000a YL |
243 | static int acpi_video_get_brightness(struct backlight_device *bd) |
244 | { | |
27663c58 | 245 | unsigned long long cur_level; |
38531e6f | 246 | int i; |
7c364e79 | 247 | struct acpi_video_device *vd = bl_get_data(bd); |
c8890f90 | 248 | |
a89803df | 249 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
c8890f90 | 250 | return -EINVAL; |
38531e6f MG |
251 | for (i = 2; i < vd->brightness->count; i++) { |
252 | if (vd->brightness->levels[i] == cur_level) | |
21fcb34e FC |
253 | /* |
254 | * The first two entries are special - see page 575 | |
255 | * of the ACPI spec 3.0 | |
256 | */ | |
915ea7e4 | 257 | return i - 2; |
38531e6f MG |
258 | } |
259 | return 0; | |
2f3d000a YL |
260 | } |
261 | ||
262 | static int acpi_video_set_brightness(struct backlight_device *bd) | |
263 | { | |
24450c7a | 264 | int request_level = bd->props.brightness + 2; |
7c364e79 | 265 | struct acpi_video_device *vd = bl_get_data(bd); |
24450c7a ZR |
266 | |
267 | return acpi_video_device_lcd_set_level(vd, | |
268 | vd->brightness->levels[request_level]); | |
2f3d000a YL |
269 | } |
270 | ||
acc2472e | 271 | static const struct backlight_ops acpi_backlight_ops = { |
599a52d1 RP |
272 | .get_brightness = acpi_video_get_brightness, |
273 | .update_status = acpi_video_set_brightness, | |
274 | }; | |
275 | ||
702ed512 | 276 | /* thermal cooling device callbacks */ |
4a703a8f | 277 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 278 | long *state) |
702ed512 | 279 | { |
4a703a8f | 280 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
281 | struct acpi_video_device *video = acpi_driver_data(device); |
282 | ||
6503e5df MG |
283 | *state = video->brightness->count - 3; |
284 | return 0; | |
702ed512 ZR |
285 | } |
286 | ||
4a703a8f | 287 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
6503e5df | 288 | long *state) |
702ed512 | 289 | { |
4a703a8f | 290 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 | 291 | struct acpi_video_device *video = acpi_driver_data(device); |
27663c58 | 292 | unsigned long long level; |
6503e5df | 293 | int offset; |
702ed512 | 294 | |
a89803df | 295 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
c8890f90 | 296 | return -EINVAL; |
6503e5df MG |
297 | for (offset = 2; offset < video->brightness->count; offset++) |
298 | if (level == video->brightness->levels[offset]) { | |
299 | *state = video->brightness->count - offset - 1; | |
300 | return 0; | |
301 | } | |
702ed512 ZR |
302 | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | static int | |
4a703a8f | 307 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
702ed512 | 308 | { |
4a703a8f | 309 | struct acpi_device *device = cooling_dev->devdata; |
702ed512 ZR |
310 | struct acpi_video_device *video = acpi_driver_data(device); |
311 | int level; | |
312 | ||
915ea7e4 | 313 | if (state >= video->brightness->count - 2) |
702ed512 ZR |
314 | return -EINVAL; |
315 | ||
316 | state = video->brightness->count - state; | |
915ea7e4 | 317 | level = video->brightness->levels[state - 1]; |
702ed512 ZR |
318 | return acpi_video_device_lcd_set_level(video, level); |
319 | } | |
320 | ||
9c8b04be | 321 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
702ed512 ZR |
322 | .get_max_state = video_get_max_state, |
323 | .get_cur_state = video_get_cur_state, | |
324 | .set_cur_state = video_set_cur_state, | |
325 | }; | |
326 | ||
21fcb34e FC |
327 | /* |
328 | * -------------------------------------------------------------------------- | |
329 | * Video Management | |
330 | * -------------------------------------------------------------------------- | |
331 | */ | |
1da177e4 | 332 | |
1da177e4 | 333 | static int |
4be44fcd LB |
334 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
335 | union acpi_object **levels) | |
1da177e4 | 336 | { |
4be44fcd LB |
337 | int status; |
338 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
339 | union acpi_object *obj; | |
1da177e4 | 340 | |
1da177e4 LT |
341 | |
342 | *levels = NULL; | |
343 | ||
90130268 | 344 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
1da177e4 | 345 | if (!ACPI_SUCCESS(status)) |
d550d98d | 346 | return status; |
4be44fcd | 347 | obj = (union acpi_object *)buffer.pointer; |
6665bda7 | 348 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 349 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
1da177e4 LT |
350 | status = -EFAULT; |
351 | goto err; | |
352 | } | |
353 | ||
354 | *levels = obj; | |
355 | ||
d550d98d | 356 | return 0; |
1da177e4 | 357 | |
915ea7e4 | 358 | err: |
6044ec88 | 359 | kfree(buffer.pointer); |
1da177e4 | 360 | |
d550d98d | 361 | return status; |
1da177e4 LT |
362 | } |
363 | ||
364 | static int | |
4be44fcd | 365 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
1da177e4 | 366 | { |
24450c7a | 367 | int status; |
9e6dada9 | 368 | int state; |
1da177e4 | 369 | |
0db98202 JL |
370 | status = acpi_execute_simple_method(device->dev->handle, |
371 | "_BCM", level); | |
24450c7a ZR |
372 | if (ACPI_FAILURE(status)) { |
373 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); | |
374 | return -EIO; | |
375 | } | |
376 | ||
4500ca8e | 377 | device->brightness->curr = level; |
9e6dada9 | 378 | for (state = 2; state < device->brightness->count; state++) |
24450c7a | 379 | if (level == device->brightness->levels[state]) { |
1a7c618a ZR |
380 | if (device->backlight) |
381 | device->backlight->props.brightness = state - 2; | |
24450c7a ZR |
382 | return 0; |
383 | } | |
9e6dada9 | 384 | |
24450c7a ZR |
385 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
386 | return -EINVAL; | |
1da177e4 LT |
387 | } |
388 | ||
45cb50e6 ZR |
389 | /* |
390 | * For some buggy _BQC methods, we need to add a constant value to | |
391 | * the _BQC return value to get the actual current brightness level | |
392 | */ | |
393 | ||
394 | static int bqc_offset_aml_bug_workaround; | |
395 | static int __init video_set_bqc_offset(const struct dmi_system_id *d) | |
396 | { | |
397 | bqc_offset_aml_bug_workaround = 9; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static struct dmi_system_id video_dmi_table[] __initdata = { | |
402 | /* | |
403 | * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 | |
404 | */ | |
405 | { | |
406 | .callback = video_set_bqc_offset, | |
407 | .ident = "Acer Aspire 5720", | |
408 | .matches = { | |
409 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
410 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5720"), | |
411 | }, | |
412 | }, | |
5afc4abe LB |
413 | { |
414 | .callback = video_set_bqc_offset, | |
415 | .ident = "Acer Aspire 5710Z", | |
416 | .matches = { | |
417 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
418 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5710Z"), | |
419 | }, | |
420 | }, | |
34ac272b ZR |
421 | { |
422 | .callback = video_set_bqc_offset, | |
423 | .ident = "eMachines E510", | |
424 | .matches = { | |
425 | DMI_MATCH(DMI_BOARD_VENDOR, "EMACHINES"), | |
426 | DMI_MATCH(DMI_PRODUCT_NAME, "eMachines E510"), | |
427 | }, | |
428 | }, | |
93bcece2 ZR |
429 | { |
430 | .callback = video_set_bqc_offset, | |
431 | .ident = "Acer Aspire 5315", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
434 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"), | |
435 | }, | |
436 | }, | |
152a4e63 ZR |
437 | { |
438 | .callback = video_set_bqc_offset, | |
439 | .ident = "Acer Aspire 7720", | |
440 | .matches = { | |
441 | DMI_MATCH(DMI_BOARD_VENDOR, "Acer"), | |
442 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), | |
443 | }, | |
444 | }, | |
45cb50e6 ZR |
445 | {} |
446 | }; | |
447 | ||
994fa63c DB |
448 | static unsigned long long |
449 | acpi_video_bqc_value_to_level(struct acpi_video_device *device, | |
450 | unsigned long long bqc_value) | |
451 | { | |
452 | unsigned long long level; | |
453 | ||
454 | if (device->brightness->flags._BQC_use_index) { | |
455 | /* | |
456 | * _BQC returns an index that doesn't account for | |
457 | * the first 2 items with special meaning, so we need | |
458 | * to compensate for that by offsetting ourselves | |
459 | */ | |
460 | if (device->brightness->flags._BCL_reversed) | |
461 | bqc_value = device->brightness->count - 3 - bqc_value; | |
462 | ||
463 | level = device->brightness->levels[bqc_value + 2]; | |
464 | } else { | |
465 | level = bqc_value; | |
466 | } | |
467 | ||
468 | level += bqc_offset_aml_bug_workaround; | |
469 | ||
470 | return level; | |
471 | } | |
472 | ||
1da177e4 | 473 | static int |
4be44fcd | 474 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
a89803df | 475 | unsigned long long *level, bool raw) |
1da177e4 | 476 | { |
c8890f90 | 477 | acpi_status status = AE_OK; |
4e231fa4 | 478 | int i; |
c8890f90 | 479 | |
c60d638e ZR |
480 | if (device->cap._BQC || device->cap._BCQ) { |
481 | char *buf = device->cap._BQC ? "_BQC" : "_BCQ"; | |
482 | ||
483 | status = acpi_evaluate_integer(device->dev->handle, buf, | |
c8890f90 ZR |
484 | NULL, level); |
485 | if (ACPI_SUCCESS(status)) { | |
a89803df DB |
486 | if (raw) { |
487 | /* | |
488 | * Caller has indicated he wants the raw | |
489 | * value returned by _BQC, so don't furtherly | |
490 | * mess with the value. | |
491 | */ | |
492 | return 0; | |
493 | } | |
494 | ||
994fa63c | 495 | *level = acpi_video_bqc_value_to_level(device, *level); |
1a7c618a | 496 | |
4e231fa4 VS |
497 | for (i = 2; i < device->brightness->count; i++) |
498 | if (device->brightness->levels[i] == *level) { | |
499 | device->brightness->curr = *level; | |
500 | return 0; | |
915ea7e4 | 501 | } |
a89803df DB |
502 | /* |
503 | * BQC returned an invalid level. | |
504 | * Stop using it. | |
505 | */ | |
506 | ACPI_WARNING((AE_INFO, | |
507 | "%s returned an invalid level", | |
508 | buf)); | |
509 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 | 510 | } else { |
21fcb34e FC |
511 | /* |
512 | * Fixme: | |
c8890f90 ZR |
513 | * should we return an error or ignore this failure? |
514 | * dev->brightness->curr is a cached value which stores | |
515 | * the correct current backlight level in most cases. | |
516 | * ACPI video backlight still works w/ buggy _BQC. | |
517 | * http://bugzilla.kernel.org/show_bug.cgi?id=12233 | |
518 | */ | |
c60d638e ZR |
519 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
520 | device->cap._BQC = device->cap._BCQ = 0; | |
c8890f90 ZR |
521 | } |
522 | } | |
523 | ||
4500ca8e | 524 | *level = device->brightness->curr; |
c8890f90 | 525 | return 0; |
1da177e4 LT |
526 | } |
527 | ||
528 | static int | |
4be44fcd LB |
529 | acpi_video_device_EDID(struct acpi_video_device *device, |
530 | union acpi_object **edid, ssize_t length) | |
1da177e4 | 531 | { |
4be44fcd LB |
532 | int status; |
533 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
534 | union acpi_object *obj; | |
535 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
536 | struct acpi_object_list args = { 1, &arg0 }; | |
1da177e4 | 537 | |
1da177e4 LT |
538 | |
539 | *edid = NULL; | |
540 | ||
541 | if (!device) | |
d550d98d | 542 | return -ENODEV; |
1da177e4 LT |
543 | if (length == 128) |
544 | arg0.integer.value = 1; | |
545 | else if (length == 256) | |
546 | arg0.integer.value = 2; | |
547 | else | |
d550d98d | 548 | return -EINVAL; |
1da177e4 | 549 | |
90130268 | 550 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
1da177e4 | 551 | if (ACPI_FAILURE(status)) |
d550d98d | 552 | return -ENODEV; |
1da177e4 | 553 | |
50dd0969 | 554 | obj = buffer.pointer; |
1da177e4 LT |
555 | |
556 | if (obj && obj->type == ACPI_TYPE_BUFFER) | |
557 | *edid = obj; | |
558 | else { | |
6468463a | 559 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
1da177e4 LT |
560 | status = -EFAULT; |
561 | kfree(obj); | |
562 | } | |
563 | ||
d550d98d | 564 | return status; |
1da177e4 LT |
565 | } |
566 | ||
1da177e4 LT |
567 | /* bus */ |
568 | ||
1da177e4 LT |
569 | /* |
570 | * Arg: | |
21fcb34e FC |
571 | * video : video bus device pointer |
572 | * bios_flag : | |
1da177e4 LT |
573 | * 0. The system BIOS should NOT automatically switch(toggle) |
574 | * the active display output. | |
575 | * 1. The system BIOS should automatically switch (toggle) the | |
98fb8fe1 | 576 | * active display output. No switch event. |
1da177e4 LT |
577 | * 2. The _DGS value should be locked. |
578 | * 3. The system BIOS should not automatically switch (toggle) the | |
579 | * active display output, but instead generate the display switch | |
580 | * event notify code. | |
581 | * lcd_flag : | |
582 | * 0. The system BIOS should automatically control the brightness level | |
98fb8fe1 | 583 | * of the LCD when the power changes from AC to DC |
21fcb34e | 584 | * 1. The system BIOS should NOT automatically control the brightness |
98fb8fe1 | 585 | * level of the LCD when the power changes from AC to DC. |
21fcb34e | 586 | * Return Value: |
ea9f8856 | 587 | * -EINVAL wrong arg. |
1da177e4 LT |
588 | */ |
589 | ||
590 | static int | |
4be44fcd | 591 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
1da177e4 | 592 | { |
ea9f8856 | 593 | acpi_status status; |
1da177e4 | 594 | |
b0373843 ZR |
595 | if (!video->cap._DOS) |
596 | return 0; | |
1da177e4 | 597 | |
ea9f8856 IM |
598 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
599 | return -EINVAL; | |
0db98202 JL |
600 | video->dos_setting = (lcd_flag << 2) | bios_flag; |
601 | status = acpi_execute_simple_method(video->device->handle, "_DOS", | |
602 | (lcd_flag << 2) | bios_flag); | |
ea9f8856 IM |
603 | if (ACPI_FAILURE(status)) |
604 | return -EIO; | |
1da177e4 | 605 | |
ea9f8856 | 606 | return 0; |
1da177e4 LT |
607 | } |
608 | ||
935e5f29 ZR |
609 | /* |
610 | * Simple comparison function used to sort backlight levels. | |
611 | */ | |
612 | ||
613 | static int | |
614 | acpi_video_cmp_level(const void *a, const void *b) | |
615 | { | |
616 | return *(int *)a - *(int *)b; | |
617 | } | |
618 | ||
a50188da AL |
619 | /* |
620 | * Decides if _BQC/_BCQ for this system is usable | |
621 | * | |
622 | * We do this by changing the level first and then read out the current | |
623 | * brightness level, if the value does not match, find out if it is using | |
624 | * index. If not, clear the _BQC/_BCQ capability. | |
625 | */ | |
626 | static int acpi_video_bqc_quirk(struct acpi_video_device *device, | |
627 | int max_level, int current_level) | |
628 | { | |
629 | struct acpi_video_device_brightness *br = device->brightness; | |
630 | int result; | |
631 | unsigned long long level; | |
632 | int test_level; | |
633 | ||
634 | /* don't mess with existing known broken systems */ | |
635 | if (bqc_offset_aml_bug_workaround) | |
636 | return 0; | |
637 | ||
638 | /* | |
639 | * Some systems always report current brightness level as maximum | |
640 | * through _BQC, we need to test another value for them. | |
641 | */ | |
b3b301c5 | 642 | test_level = current_level == max_level ? br->levels[3] : max_level; |
a50188da AL |
643 | |
644 | result = acpi_video_device_lcd_set_level(device, test_level); | |
645 | if (result) | |
646 | return result; | |
647 | ||
648 | result = acpi_video_device_lcd_get_level_current(device, &level, true); | |
649 | if (result) | |
650 | return result; | |
651 | ||
652 | if (level != test_level) { | |
653 | /* buggy _BQC found, need to find out if it uses index */ | |
654 | if (level < br->count) { | |
655 | if (br->flags._BCL_reversed) | |
656 | level = br->count - 3 - level; | |
657 | if (br->levels[level + 2] == test_level) | |
658 | br->flags._BQC_use_index = 1; | |
659 | } | |
660 | ||
661 | if (!br->flags._BQC_use_index) | |
662 | device->cap._BQC = device->cap._BCQ = 0; | |
663 | } | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | ||
1da177e4 | 669 | /* |
21fcb34e FC |
670 | * Arg: |
671 | * device : video output device (LCD, CRT, ..) | |
1da177e4 LT |
672 | * |
673 | * Return Value: | |
469778c1 JJ |
674 | * Maximum brightness level |
675 | * | |
676 | * Allocate and initialize device->brightness. | |
677 | */ | |
678 | ||
679 | static int | |
680 | acpi_video_init_brightness(struct acpi_video_device *device) | |
681 | { | |
682 | union acpi_object *obj = NULL; | |
d32f6947 | 683 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
1a7c618a | 684 | unsigned long long level, level_old; |
469778c1 JJ |
685 | union acpi_object *o; |
686 | struct acpi_video_device_brightness *br = NULL; | |
1a7c618a | 687 | int result = -EINVAL; |
469778c1 JJ |
688 | |
689 | if (!ACPI_SUCCESS(acpi_video_device_lcd_query_levels(device, &obj))) { | |
690 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Could not query available " | |
691 | "LCD brightness level\n")); | |
692 | goto out; | |
693 | } | |
694 | ||
695 | if (obj->package.count < 2) | |
696 | goto out; | |
697 | ||
698 | br = kzalloc(sizeof(*br), GFP_KERNEL); | |
699 | if (!br) { | |
700 | printk(KERN_ERR "can't allocate memory\n"); | |
1a7c618a | 701 | result = -ENOMEM; |
469778c1 JJ |
702 | goto out; |
703 | } | |
704 | ||
d32f6947 | 705 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
469778c1 | 706 | GFP_KERNEL); |
1a7c618a ZR |
707 | if (!br->levels) { |
708 | result = -ENOMEM; | |
469778c1 | 709 | goto out_free; |
1a7c618a | 710 | } |
469778c1 JJ |
711 | |
712 | for (i = 0; i < obj->package.count; i++) { | |
713 | o = (union acpi_object *)&obj->package.elements[i]; | |
714 | if (o->type != ACPI_TYPE_INTEGER) { | |
715 | printk(KERN_ERR PREFIX "Invalid data\n"); | |
716 | continue; | |
717 | } | |
718 | br->levels[count] = (u32) o->integer.value; | |
719 | ||
720 | if (br->levels[count] > max_level) | |
721 | max_level = br->levels[count]; | |
722 | count++; | |
723 | } | |
724 | ||
d32f6947 ZR |
725 | /* |
726 | * some buggy BIOS don't export the levels | |
727 | * when machine is on AC/Battery in _BCL package. | |
728 | * In this case, the first two elements in _BCL packages | |
729 | * are also supported brightness levels that OS should take care of. | |
730 | */ | |
90af2cf6 ZR |
731 | for (i = 2; i < count; i++) { |
732 | if (br->levels[i] == br->levels[0]) | |
d32f6947 | 733 | level_ac_battery++; |
90af2cf6 ZR |
734 | if (br->levels[i] == br->levels[1]) |
735 | level_ac_battery++; | |
736 | } | |
d32f6947 ZR |
737 | |
738 | if (level_ac_battery < 2) { | |
739 | level_ac_battery = 2 - level_ac_battery; | |
740 | br->flags._BCL_no_ac_battery_levels = 1; | |
741 | for (i = (count - 1 + level_ac_battery); i >= 2; i--) | |
742 | br->levels[i] = br->levels[i - level_ac_battery]; | |
743 | count += level_ac_battery; | |
744 | } else if (level_ac_battery > 2) | |
bf6787eb | 745 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
d32f6947 | 746 | |
d80fb99f ZR |
747 | /* Check if the _BCL package is in a reversed order */ |
748 | if (max_level == br->levels[2]) { | |
749 | br->flags._BCL_reversed = 1; | |
750 | sort(&br->levels[2], count - 2, sizeof(br->levels[2]), | |
751 | acpi_video_cmp_level, NULL); | |
752 | } else if (max_level != br->levels[count - 1]) | |
753 | ACPI_ERROR((AE_INFO, | |
bf6787eb | 754 | "Found unordered _BCL package")); |
469778c1 JJ |
755 | |
756 | br->count = count; | |
757 | device->brightness = br; | |
1a7c618a | 758 | |
1a7c618a | 759 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
90c53ca4 | 760 | br->curr = level = max_level; |
e047cca6 ZR |
761 | |
762 | if (!device->cap._BQC) | |
763 | goto set_level; | |
764 | ||
a89803df DB |
765 | result = acpi_video_device_lcd_get_level_current(device, |
766 | &level_old, true); | |
1a7c618a ZR |
767 | if (result) |
768 | goto out_free_levels; | |
769 | ||
a50188da | 770 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
1a7c618a ZR |
771 | if (result) |
772 | goto out_free_levels; | |
a50188da AL |
773 | /* |
774 | * cap._BQC may get cleared due to _BQC is found to be broken | |
775 | * in acpi_video_bqc_quirk, so check again here. | |
776 | */ | |
777 | if (!device->cap._BQC) | |
778 | goto set_level; | |
e047cca6 | 779 | |
545ef368 AL |
780 | level = acpi_video_bqc_value_to_level(device, level_old); |
781 | /* | |
782 | * On some buggy laptops, _BQC returns an uninitialized | |
783 | * value when invoked for the first time, i.e. | |
784 | * level_old is invalid (no matter whether it's a level | |
785 | * or an index). Set the backlight to max_level in this case. | |
786 | */ | |
787 | for (i = 2; i < br->count; i++) | |
788 | if (level == br->levels[i]) | |
789 | break; | |
790 | if (i == br->count || !level) | |
791 | level = max_level; | |
e047cca6 | 792 | |
e047cca6 | 793 | set_level: |
90c53ca4 | 794 | result = acpi_video_device_lcd_set_level(device, level); |
e047cca6 ZR |
795 | if (result) |
796 | goto out_free_levels; | |
1a7c618a | 797 | |
d32f6947 ZR |
798 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
799 | "found %d brightness levels\n", count - 2)); | |
469778c1 | 800 | kfree(obj); |
1a7c618a | 801 | return result; |
469778c1 JJ |
802 | |
803 | out_free_levels: | |
804 | kfree(br->levels); | |
805 | out_free: | |
806 | kfree(br); | |
807 | out: | |
808 | device->brightness = NULL; | |
809 | kfree(obj); | |
1a7c618a | 810 | return result; |
469778c1 JJ |
811 | } |
812 | ||
813 | /* | |
814 | * Arg: | |
815 | * device : video output device (LCD, CRT, ..) | |
816 | * | |
817 | * Return Value: | |
21fcb34e | 818 | * None |
1da177e4 | 819 | * |
98fb8fe1 | 820 | * Find out all required AML methods defined under the output |
1da177e4 LT |
821 | * device. |
822 | */ | |
823 | ||
4be44fcd | 824 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
1da177e4 | 825 | { |
952c63e9 | 826 | if (acpi_has_method(device->dev->handle, "_ADR")) |
1da177e4 | 827 | device->cap._ADR = 1; |
952c63e9 | 828 | if (acpi_has_method(device->dev->handle, "_BCL")) |
4be44fcd | 829 | device->cap._BCL = 1; |
952c63e9 | 830 | if (acpi_has_method(device->dev->handle, "_BCM")) |
4be44fcd | 831 | device->cap._BCM = 1; |
952c63e9 | 832 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
2f3d000a | 833 | device->cap._BQC = 1; |
952c63e9 | 834 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
c60d638e ZR |
835 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
836 | device->cap._BCQ = 1; | |
837 | } | |
838 | ||
952c63e9 | 839 | if (acpi_has_method(device->dev->handle, "_DDC")) |
4be44fcd | 840 | device->cap._DDC = 1; |
1da177e4 LT |
841 | } |
842 | ||
843 | /* | |
21fcb34e FC |
844 | * Arg: |
845 | * device : video output device (VGA) | |
1da177e4 LT |
846 | * |
847 | * Return Value: | |
21fcb34e | 848 | * None |
1da177e4 | 849 | * |
98fb8fe1 | 850 | * Find out all required AML methods defined under the video bus device. |
1da177e4 LT |
851 | */ |
852 | ||
4be44fcd | 853 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
1da177e4 | 854 | { |
952c63e9 | 855 | if (acpi_has_method(video->device->handle, "_DOS")) |
1da177e4 | 856 | video->cap._DOS = 1; |
952c63e9 | 857 | if (acpi_has_method(video->device->handle, "_DOD")) |
1da177e4 | 858 | video->cap._DOD = 1; |
952c63e9 | 859 | if (acpi_has_method(video->device->handle, "_ROM")) |
1da177e4 | 860 | video->cap._ROM = 1; |
952c63e9 | 861 | if (acpi_has_method(video->device->handle, "_GPD")) |
1da177e4 | 862 | video->cap._GPD = 1; |
952c63e9 | 863 | if (acpi_has_method(video->device->handle, "_SPD")) |
1da177e4 | 864 | video->cap._SPD = 1; |
952c63e9 | 865 | if (acpi_has_method(video->device->handle, "_VPO")) |
1da177e4 | 866 | video->cap._VPO = 1; |
1da177e4 LT |
867 | } |
868 | ||
869 | /* | |
870 | * Check whether the video bus device has required AML method to | |
871 | * support the desired features | |
872 | */ | |
873 | ||
4be44fcd | 874 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
1da177e4 | 875 | { |
4be44fcd | 876 | acpi_status status = -ENOENT; |
1e4cffe7 | 877 | struct pci_dev *dev; |
1da177e4 LT |
878 | |
879 | if (!video) | |
d550d98d | 880 | return -EINVAL; |
1da177e4 | 881 | |
1e4cffe7 | 882 | dev = acpi_get_pci_dev(video->device->handle); |
22c13f9d TR |
883 | if (!dev) |
884 | return -ENODEV; | |
1e4cffe7 | 885 | pci_dev_put(dev); |
22c13f9d | 886 | |
21fcb34e FC |
887 | /* |
888 | * Since there is no HID, CID and so on for VGA driver, we have | |
1da177e4 LT |
889 | * to check well known required nodes. |
890 | */ | |
891 | ||
98fb8fe1 | 892 | /* Does this device support video switching? */ |
3a1151e3 SB |
893 | if (video->cap._DOS || video->cap._DOD) { |
894 | if (!video->cap._DOS) { | |
895 | printk(KERN_WARNING FW_BUG | |
896 | "ACPI(%s) defines _DOD but not _DOS\n", | |
897 | acpi_device_bid(video->device)); | |
898 | } | |
1da177e4 LT |
899 | video->flags.multihead = 1; |
900 | status = 0; | |
901 | } | |
902 | ||
98fb8fe1 | 903 | /* Does this device support retrieving a video ROM? */ |
4be44fcd | 904 | if (video->cap._ROM) { |
1da177e4 LT |
905 | video->flags.rom = 1; |
906 | status = 0; | |
907 | } | |
908 | ||
98fb8fe1 | 909 | /* Does this device support configuring which video device to POST? */ |
4be44fcd | 910 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
1da177e4 LT |
911 | video->flags.post = 1; |
912 | status = 0; | |
913 | } | |
914 | ||
d550d98d | 915 | return status; |
1da177e4 LT |
916 | } |
917 | ||
21fcb34e FC |
918 | /* |
919 | * -------------------------------------------------------------------------- | |
920 | * Driver Interface | |
921 | * -------------------------------------------------------------------------- | |
922 | */ | |
1da177e4 LT |
923 | |
924 | /* device interface */ | |
915ea7e4 | 925 | static struct acpi_video_device_attrib * |
82cae999 RZ |
926 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
927 | { | |
78eed028 DT |
928 | struct acpi_video_enumerated_device *ids; |
929 | int i; | |
930 | ||
931 | for (i = 0; i < video->attached_count; i++) { | |
932 | ids = &video->attached_array[i]; | |
933 | if ((ids->value.int_val & 0xffff) == device_id) | |
934 | return &ids->value.attrib; | |
935 | } | |
82cae999 | 936 | |
82cae999 RZ |
937 | return NULL; |
938 | } | |
1da177e4 | 939 | |
e92a7162 MG |
940 | static int |
941 | acpi_video_get_device_type(struct acpi_video_bus *video, | |
942 | unsigned long device_id) | |
943 | { | |
944 | struct acpi_video_enumerated_device *ids; | |
945 | int i; | |
946 | ||
947 | for (i = 0; i < video->attached_count; i++) { | |
948 | ids = &video->attached_array[i]; | |
949 | if ((ids->value.int_val & 0xffff) == device_id) | |
950 | return ids->value.int_val; | |
951 | } | |
952 | ||
953 | return 0; | |
954 | } | |
955 | ||
1da177e4 | 956 | static int |
4be44fcd LB |
957 | acpi_video_bus_get_one_device(struct acpi_device *device, |
958 | struct acpi_video_bus *video) | |
1da177e4 | 959 | { |
27663c58 | 960 | unsigned long long device_id; |
e92a7162 | 961 | int status, device_type; |
4be44fcd | 962 | struct acpi_video_device *data; |
915ea7e4 | 963 | struct acpi_video_device_attrib *attribute; |
1da177e4 | 964 | |
4be44fcd LB |
965 | status = |
966 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); | |
91e13aa3 AL |
967 | /* Some device omits _ADR, we skip them instead of fail */ |
968 | if (ACPI_FAILURE(status)) | |
969 | return 0; | |
1da177e4 | 970 | |
91e13aa3 AL |
971 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
972 | if (!data) | |
973 | return -ENOMEM; | |
82cae999 | 974 | |
91e13aa3 AL |
975 | strcpy(acpi_device_name(device), ACPI_VIDEO_DEVICE_NAME); |
976 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
977 | device->driver_data = data; | |
978 | ||
979 | data->device_id = device_id; | |
980 | data->video = video; | |
981 | data->dev = device; | |
982 | ||
983 | attribute = acpi_video_get_device_attr(video, device_id); | |
984 | ||
915ea7e4 | 985 | if (attribute && attribute->device_id_scheme) { |
91e13aa3 AL |
986 | switch (attribute->display_type) { |
987 | case ACPI_VIDEO_DISPLAY_CRT: | |
988 | data->flags.crt = 1; | |
989 | break; | |
990 | case ACPI_VIDEO_DISPLAY_TV: | |
991 | data->flags.tvout = 1; | |
992 | break; | |
993 | case ACPI_VIDEO_DISPLAY_DVI: | |
994 | data->flags.dvi = 1; | |
995 | break; | |
996 | case ACPI_VIDEO_DISPLAY_LCD: | |
997 | data->flags.lcd = 1; | |
998 | break; | |
999 | default: | |
1000 | data->flags.unknown = 1; | |
1001 | break; | |
1002 | } | |
915ea7e4 | 1003 | if (attribute->bios_can_detect) |
91e13aa3 AL |
1004 | data->flags.bios = 1; |
1005 | } else { | |
1006 | /* Check for legacy IDs */ | |
1007 | device_type = acpi_video_get_device_type(video, device_id); | |
1008 | /* Ignore bits 16 and 18-20 */ | |
1009 | switch (device_type & 0xffe2ffff) { | |
915ea7e4 FC |
1010 | case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR: |
1011 | data->flags.crt = 1; | |
1012 | break; | |
1013 | case ACPI_VIDEO_DISPLAY_LEGACY_PANEL: | |
1014 | data->flags.lcd = 1; | |
1015 | break; | |
1016 | case ACPI_VIDEO_DISPLAY_LEGACY_TV: | |
1017 | data->flags.tvout = 1; | |
1018 | break; | |
1019 | default: | |
1020 | data->flags.unknown = 1; | |
e92a7162 | 1021 | } |
91e13aa3 | 1022 | } |
4be44fcd | 1023 | |
91e13aa3 AL |
1024 | acpi_video_device_bind(video, data); |
1025 | acpi_video_device_find_cap(data); | |
1da177e4 | 1026 | |
91e13aa3 AL |
1027 | mutex_lock(&video->device_list_lock); |
1028 | list_add_tail(&data->entry, &video->video_device_list); | |
1029 | mutex_unlock(&video->device_list_lock); | |
1da177e4 | 1030 | |
91e13aa3 | 1031 | return status; |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | /* | |
1035 | * Arg: | |
21fcb34e | 1036 | * video : video bus device |
1da177e4 LT |
1037 | * |
1038 | * Return: | |
21fcb34e FC |
1039 | * none |
1040 | * | |
1041 | * Enumerate the video device list of the video bus, | |
1da177e4 LT |
1042 | * bind the ids with the corresponding video devices |
1043 | * under the video bus. | |
4be44fcd | 1044 | */ |
1da177e4 | 1045 | |
4be44fcd | 1046 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
1da177e4 | 1047 | { |
ff102ea9 DT |
1048 | struct acpi_video_device *dev; |
1049 | ||
bbac81f5 | 1050 | mutex_lock(&video->device_list_lock); |
ff102ea9 DT |
1051 | |
1052 | list_for_each_entry(dev, &video->video_device_list, entry) | |
4be44fcd | 1053 | acpi_video_device_bind(video, dev); |
ff102ea9 | 1054 | |
bbac81f5 | 1055 | mutex_unlock(&video->device_list_lock); |
1da177e4 LT |
1056 | } |
1057 | ||
1058 | /* | |
1059 | * Arg: | |
21fcb34e FC |
1060 | * video : video bus device |
1061 | * device : video output device under the video | |
1062 | * bus | |
1da177e4 LT |
1063 | * |
1064 | * Return: | |
21fcb34e FC |
1065 | * none |
1066 | * | |
1da177e4 LT |
1067 | * Bind the ids with the corresponding video devices |
1068 | * under the video bus. | |
4be44fcd | 1069 | */ |
1da177e4 LT |
1070 | |
1071 | static void | |
4be44fcd LB |
1072 | acpi_video_device_bind(struct acpi_video_bus *video, |
1073 | struct acpi_video_device *device) | |
1da177e4 | 1074 | { |
78eed028 | 1075 | struct acpi_video_enumerated_device *ids; |
4be44fcd | 1076 | int i; |
1da177e4 | 1077 | |
78eed028 DT |
1078 | for (i = 0; i < video->attached_count; i++) { |
1079 | ids = &video->attached_array[i]; | |
1080 | if (device->device_id == (ids->value.int_val & 0xffff)) { | |
1081 | ids->bind_info = device; | |
1da177e4 LT |
1082 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
1083 | } | |
1084 | } | |
1da177e4 LT |
1085 | } |
1086 | ||
1087 | /* | |
1088 | * Arg: | |
21fcb34e | 1089 | * video : video bus device |
1da177e4 LT |
1090 | * |
1091 | * Return: | |
21fcb34e FC |
1092 | * < 0 : error |
1093 | * | |
1da177e4 LT |
1094 | * Call _DOD to enumerate all devices attached to display adapter |
1095 | * | |
4be44fcd | 1096 | */ |
1da177e4 LT |
1097 | |
1098 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) | |
1099 | { | |
4be44fcd LB |
1100 | int status; |
1101 | int count; | |
1102 | int i; | |
78eed028 | 1103 | struct acpi_video_enumerated_device *active_list; |
4be44fcd LB |
1104 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1105 | union acpi_object *dod = NULL; | |
1106 | union acpi_object *obj; | |
1da177e4 | 1107 | |
90130268 | 1108 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
1da177e4 | 1109 | if (!ACPI_SUCCESS(status)) { |
a6fc6720 | 1110 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
d550d98d | 1111 | return status; |
1da177e4 LT |
1112 | } |
1113 | ||
50dd0969 | 1114 | dod = buffer.pointer; |
1da177e4 | 1115 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
a6fc6720 | 1116 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
1da177e4 LT |
1117 | status = -EFAULT; |
1118 | goto out; | |
1119 | } | |
1120 | ||
1121 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", | |
4be44fcd | 1122 | dod->package.count)); |
1da177e4 | 1123 | |
78eed028 DT |
1124 | active_list = kcalloc(1 + dod->package.count, |
1125 | sizeof(struct acpi_video_enumerated_device), | |
1126 | GFP_KERNEL); | |
1127 | if (!active_list) { | |
1da177e4 LT |
1128 | status = -ENOMEM; |
1129 | goto out; | |
1130 | } | |
1131 | ||
1132 | count = 0; | |
1133 | for (i = 0; i < dod->package.count; i++) { | |
50dd0969 | 1134 | obj = &dod->package.elements[i]; |
1da177e4 LT |
1135 | |
1136 | if (obj->type != ACPI_TYPE_INTEGER) { | |
78eed028 DT |
1137 | printk(KERN_ERR PREFIX |
1138 | "Invalid _DOD data in element %d\n", i); | |
1139 | continue; | |
1da177e4 | 1140 | } |
78eed028 DT |
1141 | |
1142 | active_list[count].value.int_val = obj->integer.value; | |
1143 | active_list[count].bind_info = NULL; | |
4be44fcd LB |
1144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
1145 | (int)obj->integer.value)); | |
1da177e4 LT |
1146 | count++; |
1147 | } | |
1da177e4 | 1148 | |
6044ec88 | 1149 | kfree(video->attached_array); |
4be44fcd | 1150 | |
78eed028 | 1151 | video->attached_array = active_list; |
1da177e4 | 1152 | video->attached_count = count; |
78eed028 | 1153 | |
915ea7e4 | 1154 | out: |
02438d87 | 1155 | kfree(buffer.pointer); |
d550d98d | 1156 | return status; |
1da177e4 LT |
1157 | } |
1158 | ||
4be44fcd LB |
1159 | static int |
1160 | acpi_video_get_next_level(struct acpi_video_device *device, | |
1161 | u32 level_current, u32 event) | |
1da177e4 | 1162 | { |
63f0edfc | 1163 | int min, max, min_above, max_below, i, l, delta = 255; |
f4715189 TT |
1164 | max = max_below = 0; |
1165 | min = min_above = 255; | |
63f0edfc | 1166 | /* Find closest level to level_current */ |
0a3db1ce | 1167 | for (i = 2; i < device->brightness->count; i++) { |
63f0edfc AS |
1168 | l = device->brightness->levels[i]; |
1169 | if (abs(l - level_current) < abs(delta)) { | |
1170 | delta = l - level_current; | |
1171 | if (!delta) | |
1172 | break; | |
1173 | } | |
1174 | } | |
1175 | /* Ajust level_current to closest available level */ | |
1176 | level_current += delta; | |
0a3db1ce | 1177 | for (i = 2; i < device->brightness->count; i++) { |
f4715189 TT |
1178 | l = device->brightness->levels[i]; |
1179 | if (l < min) | |
1180 | min = l; | |
1181 | if (l > max) | |
1182 | max = l; | |
1183 | if (l < min_above && l > level_current) | |
1184 | min_above = l; | |
1185 | if (l > max_below && l < level_current) | |
1186 | max_below = l; | |
1187 | } | |
1188 | ||
1189 | switch (event) { | |
1190 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: | |
1191 | return (level_current < max) ? min_above : min; | |
1192 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: | |
1193 | return (level_current < max) ? min_above : max; | |
1194 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: | |
1195 | return (level_current > min) ? max_below : min; | |
1196 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: | |
1197 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: | |
1198 | return 0; | |
1199 | default: | |
1200 | return level_current; | |
1201 | } | |
1da177e4 LT |
1202 | } |
1203 | ||
c8890f90 | 1204 | static int |
4be44fcd | 1205 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
1da177e4 | 1206 | { |
27663c58 | 1207 | unsigned long long level_current, level_next; |
c8890f90 ZR |
1208 | int result = -EINVAL; |
1209 | ||
fbc9fe1b AL |
1210 | /* no warning message if acpi_backlight=vendor or a quirk is used */ |
1211 | if (!acpi_video_verify_backlight_support()) | |
28c32e99 ZR |
1212 | return 0; |
1213 | ||
469778c1 | 1214 | if (!device->brightness) |
c8890f90 ZR |
1215 | goto out; |
1216 | ||
1217 | result = acpi_video_device_lcd_get_level_current(device, | |
a89803df DB |
1218 | &level_current, |
1219 | false); | |
c8890f90 ZR |
1220 | if (result) |
1221 | goto out; | |
1222 | ||
1da177e4 | 1223 | level_next = acpi_video_get_next_level(device, level_current, event); |
c8890f90 | 1224 | |
24450c7a | 1225 | result = acpi_video_device_lcd_set_level(device, level_next); |
c8890f90 | 1226 | |
36342742 MG |
1227 | if (!result) |
1228 | backlight_force_update(device->backlight, | |
1229 | BACKLIGHT_UPDATE_HOTKEY); | |
1230 | ||
c8890f90 ZR |
1231 | out: |
1232 | if (result) | |
1233 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); | |
1234 | ||
1235 | return result; | |
1da177e4 LT |
1236 | } |
1237 | ||
e92a7162 MG |
1238 | int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, |
1239 | void **edid) | |
1240 | { | |
1241 | struct acpi_video_bus *video; | |
1242 | struct acpi_video_device *video_device; | |
1243 | union acpi_object *buffer = NULL; | |
1244 | acpi_status status; | |
1245 | int i, length; | |
1246 | ||
1247 | if (!device || !acpi_driver_data(device)) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | video = acpi_driver_data(device); | |
1251 | ||
1252 | for (i = 0; i < video->attached_count; i++) { | |
1253 | video_device = video->attached_array[i].bind_info; | |
1254 | length = 256; | |
1255 | ||
1256 | if (!video_device) | |
1257 | continue; | |
1258 | ||
82069552 ZR |
1259 | if (!video_device->cap._DDC) |
1260 | continue; | |
1261 | ||
e92a7162 MG |
1262 | if (type) { |
1263 | switch (type) { | |
1264 | case ACPI_VIDEO_DISPLAY_CRT: | |
1265 | if (!video_device->flags.crt) | |
1266 | continue; | |
1267 | break; | |
1268 | case ACPI_VIDEO_DISPLAY_TV: | |
1269 | if (!video_device->flags.tvout) | |
1270 | continue; | |
1271 | break; | |
1272 | case ACPI_VIDEO_DISPLAY_DVI: | |
1273 | if (!video_device->flags.dvi) | |
1274 | continue; | |
1275 | break; | |
1276 | case ACPI_VIDEO_DISPLAY_LCD: | |
1277 | if (!video_device->flags.lcd) | |
1278 | continue; | |
1279 | break; | |
1280 | } | |
1281 | } else if (video_device->device_id != device_id) { | |
1282 | continue; | |
1283 | } | |
1284 | ||
1285 | status = acpi_video_device_EDID(video_device, &buffer, length); | |
1286 | ||
1287 | if (ACPI_FAILURE(status) || !buffer || | |
1288 | buffer->type != ACPI_TYPE_BUFFER) { | |
1289 | length = 128; | |
1290 | status = acpi_video_device_EDID(video_device, &buffer, | |
1291 | length); | |
1292 | if (ACPI_FAILURE(status) || !buffer || | |
1293 | buffer->type != ACPI_TYPE_BUFFER) { | |
1294 | continue; | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | *edid = buffer->buffer.pointer; | |
1299 | return length; | |
1300 | } | |
1301 | ||
1302 | return -ENODEV; | |
1303 | } | |
1304 | EXPORT_SYMBOL(acpi_video_get_edid); | |
1305 | ||
1da177e4 | 1306 | static int |
4be44fcd LB |
1307 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
1308 | struct acpi_device *device) | |
1da177e4 | 1309 | { |
fba4e087 | 1310 | int status = 0; |
ff102ea9 | 1311 | struct acpi_device *dev; |
1da177e4 | 1312 | |
fba4e087 IM |
1313 | /* |
1314 | * There are systems where video module known to work fine regardless | |
1315 | * of broken _DOD and ignoring returned value here doesn't cause | |
1316 | * any issues later. | |
1317 | */ | |
1318 | acpi_video_device_enumerate(video); | |
1da177e4 | 1319 | |
ff102ea9 | 1320 | list_for_each_entry(dev, &device->children, node) { |
1da177e4 LT |
1321 | |
1322 | status = acpi_video_bus_get_one_device(dev, video); | |
ea9f8856 | 1323 | if (status) { |
91e13aa3 AL |
1324 | dev_err(&dev->dev, "Can't attach device\n"); |
1325 | break; | |
1da177e4 | 1326 | } |
1da177e4 | 1327 | } |
d550d98d | 1328 | return status; |
1da177e4 LT |
1329 | } |
1330 | ||
1da177e4 LT |
1331 | /* acpi_video interface */ |
1332 | ||
efaa14c7 AL |
1333 | /* |
1334 | * Win8 requires setting bit2 of _DOS to let firmware know it shouldn't | |
1335 | * preform any automatic brightness change on receiving a notification. | |
1336 | */ | |
4be44fcd | 1337 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
1da177e4 | 1338 | { |
efaa14c7 | 1339 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1340 | acpi_osi_is_win8() ? 1 : 0); |
1da177e4 LT |
1341 | } |
1342 | ||
4be44fcd | 1343 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
1da177e4 | 1344 | { |
efaa14c7 | 1345 | return acpi_video_bus_DOS(video, 0, |
fbc9fe1b | 1346 | acpi_osi_is_win8() ? 0 : 1); |
1da177e4 LT |
1347 | } |
1348 | ||
7015558f | 1349 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
1da177e4 | 1350 | { |
7015558f | 1351 | struct acpi_video_bus *video = acpi_driver_data(device); |
e9dab196 | 1352 | struct input_dev *input; |
17c452f9 | 1353 | int keycode = 0; |
e9dab196 | 1354 | |
67b662e1 | 1355 | if (!video || !video->input) |
d550d98d | 1356 | return; |
1da177e4 | 1357 | |
e9dab196 | 1358 | input = video->input; |
1da177e4 LT |
1359 | |
1360 | switch (event) { | |
98fb8fe1 | 1361 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
1da177e4 | 1362 | * most likely via hotkey. */ |
8a37c65d | 1363 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1364 | break; |
1365 | ||
98fb8fe1 | 1366 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
1da177e4 LT |
1367 | * connector. */ |
1368 | acpi_video_device_enumerate(video); | |
1369 | acpi_video_device_rebind(video); | |
e9dab196 | 1370 | keycode = KEY_SWITCHVIDEOMODE; |
1da177e4 LT |
1371 | break; |
1372 | ||
4be44fcd | 1373 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
e9dab196 LY |
1374 | keycode = KEY_SWITCHVIDEOMODE; |
1375 | break; | |
4be44fcd | 1376 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
e9dab196 LY |
1377 | keycode = KEY_VIDEO_NEXT; |
1378 | break; | |
4be44fcd | 1379 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
e9dab196 | 1380 | keycode = KEY_VIDEO_PREV; |
1da177e4 LT |
1381 | break; |
1382 | ||
1383 | default: | |
1384 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1385 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1386 | break; |
1387 | } | |
1388 | ||
8a37c65d LT |
1389 | if (acpi_notifier_call_chain(device, event, 0)) |
1390 | /* Something vetoed the keypress. */ | |
1391 | keycode = 0; | |
17c452f9 MG |
1392 | |
1393 | if (keycode) { | |
1394 | input_report_key(input, keycode, 1); | |
1395 | input_sync(input); | |
1396 | input_report_key(input, keycode, 0); | |
1397 | input_sync(input); | |
1398 | } | |
e9dab196 | 1399 | |
d550d98d | 1400 | return; |
1da177e4 LT |
1401 | } |
1402 | ||
4be44fcd | 1403 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1404 | { |
50dd0969 | 1405 | struct acpi_video_device *video_device = data; |
4be44fcd | 1406 | struct acpi_device *device = NULL; |
e9dab196 LY |
1407 | struct acpi_video_bus *bus; |
1408 | struct input_dev *input; | |
17c452f9 | 1409 | int keycode = 0; |
1da177e4 | 1410 | |
1da177e4 | 1411 | if (!video_device) |
d550d98d | 1412 | return; |
1da177e4 | 1413 | |
e6afa0de | 1414 | device = video_device->dev; |
e9dab196 LY |
1415 | bus = video_device->video; |
1416 | input = bus->input; | |
1da177e4 LT |
1417 | |
1418 | switch (event) { | |
4be44fcd | 1419 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
8a681a4d ZR |
1420 | if (brightness_switch_enabled) |
1421 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1422 | keycode = KEY_BRIGHTNESS_CYCLE; |
1423 | break; | |
4be44fcd | 1424 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
8a681a4d ZR |
1425 | if (brightness_switch_enabled) |
1426 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1427 | keycode = KEY_BRIGHTNESSUP; |
1428 | break; | |
4be44fcd | 1429 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
8a681a4d ZR |
1430 | if (brightness_switch_enabled) |
1431 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1432 | keycode = KEY_BRIGHTNESSDOWN; |
1433 | break; | |
70f23fd6 | 1434 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
8a681a4d ZR |
1435 | if (brightness_switch_enabled) |
1436 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 LY |
1437 | keycode = KEY_BRIGHTNESS_ZERO; |
1438 | break; | |
4be44fcd | 1439 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
8a681a4d ZR |
1440 | if (brightness_switch_enabled) |
1441 | acpi_video_switch_brightness(video_device, event); | |
e9dab196 | 1442 | keycode = KEY_DISPLAY_OFF; |
1da177e4 LT |
1443 | break; |
1444 | default: | |
1445 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1446 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1447 | break; |
1448 | } | |
e9dab196 | 1449 | |
7761f638 | 1450 | acpi_notifier_call_chain(device, event, 0); |
17c452f9 MG |
1451 | |
1452 | if (keycode) { | |
1453 | input_report_key(input, keycode, 1); | |
1454 | input_sync(input); | |
1455 | input_report_key(input, keycode, 0); | |
1456 | input_sync(input); | |
1457 | } | |
e9dab196 | 1458 | |
d550d98d | 1459 | return; |
1da177e4 LT |
1460 | } |
1461 | ||
ac7729da RW |
1462 | static int acpi_video_resume(struct notifier_block *nb, |
1463 | unsigned long val, void *ign) | |
863c1490 MG |
1464 | { |
1465 | struct acpi_video_bus *video; | |
1466 | struct acpi_video_device *video_device; | |
1467 | int i; | |
1468 | ||
ac7729da RW |
1469 | switch (val) { |
1470 | case PM_HIBERNATION_PREPARE: | |
1471 | case PM_SUSPEND_PREPARE: | |
1472 | case PM_RESTORE_PREPARE: | |
1473 | return NOTIFY_DONE; | |
1474 | } | |
863c1490 | 1475 | |
ac7729da RW |
1476 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
1477 | ||
1478 | dev_info(&video->device->dev, "Restoring backlight state\n"); | |
863c1490 MG |
1479 | |
1480 | for (i = 0; i < video->attached_count; i++) { | |
1481 | video_device = video->attached_array[i].bind_info; | |
1482 | if (video_device && video_device->backlight) | |
1483 | acpi_video_set_brightness(video_device->backlight); | |
1484 | } | |
ac7729da RW |
1485 | |
1486 | return NOTIFY_OK; | |
863c1490 MG |
1487 | } |
1488 | ||
c504f8cb ZR |
1489 | static acpi_status |
1490 | acpi_video_bus_match(acpi_handle handle, u32 level, void *context, | |
1491 | void **return_value) | |
1492 | { | |
1493 | struct acpi_device *device = context; | |
1494 | struct acpi_device *sibling; | |
1495 | int result; | |
1496 | ||
1497 | if (handle == device->handle) | |
1498 | return AE_CTRL_TERMINATE; | |
1499 | ||
1500 | result = acpi_bus_get_device(handle, &sibling); | |
1501 | if (result) | |
1502 | return AE_OK; | |
1503 | ||
1504 | if (!strcmp(acpi_device_name(sibling), ACPI_VIDEO_BUS_NAME)) | |
1505 | return AE_ALREADY_EXISTS; | |
1506 | ||
1507 | return AE_OK; | |
1508 | } | |
1509 | ||
67b662e1 AL |
1510 | static void acpi_video_dev_register_backlight(struct acpi_video_device *device) |
1511 | { | |
fbc9fe1b | 1512 | if (acpi_video_verify_backlight_support()) { |
67b662e1 AL |
1513 | struct backlight_properties props; |
1514 | struct pci_dev *pdev; | |
1515 | acpi_handle acpi_parent; | |
1516 | struct device *parent = NULL; | |
1517 | int result; | |
1518 | static int count; | |
1519 | char *name; | |
1520 | ||
1521 | result = acpi_video_init_brightness(device); | |
1522 | if (result) | |
1523 | return; | |
1524 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); | |
1525 | if (!name) | |
1526 | return; | |
1527 | count++; | |
1528 | ||
1529 | acpi_get_parent(device->dev->handle, &acpi_parent); | |
1530 | ||
1531 | pdev = acpi_get_pci_dev(acpi_parent); | |
1532 | if (pdev) { | |
1533 | parent = &pdev->dev; | |
1534 | pci_dev_put(pdev); | |
1535 | } | |
1536 | ||
1537 | memset(&props, 0, sizeof(struct backlight_properties)); | |
1538 | props.type = BACKLIGHT_FIRMWARE; | |
1539 | props.max_brightness = device->brightness->count - 3; | |
1540 | device->backlight = backlight_device_register(name, | |
1541 | parent, | |
1542 | device, | |
1543 | &acpi_backlight_ops, | |
1544 | &props); | |
1545 | kfree(name); | |
1546 | if (IS_ERR(device->backlight)) | |
1547 | return; | |
1548 | ||
1549 | /* | |
1550 | * Save current brightness level in case we have to restore it | |
1551 | * before acpi_video_device_lcd_set_level() is called next time. | |
1552 | */ | |
1553 | device->backlight->props.brightness = | |
1554 | acpi_video_get_brightness(device->backlight); | |
1555 | ||
1556 | device->cooling_dev = thermal_cooling_device_register("LCD", | |
1557 | device->dev, &video_cooling_ops); | |
1558 | if (IS_ERR(device->cooling_dev)) { | |
1559 | /* | |
1560 | * Set cooling_dev to NULL so we don't crash trying to | |
1561 | * free it. | |
1562 | * Also, why the hell we are returning early and | |
1563 | * not attempt to register video output if cooling | |
1564 | * device registration failed? | |
1565 | * -- dtor | |
1566 | */ | |
1567 | device->cooling_dev = NULL; | |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", | |
1572 | device->cooling_dev->id); | |
1573 | result = sysfs_create_link(&device->dev->dev.kobj, | |
1574 | &device->cooling_dev->device.kobj, | |
1575 | "thermal_cooling"); | |
1576 | if (result) | |
1577 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1578 | result = sysfs_create_link(&device->cooling_dev->device.kobj, | |
1579 | &device->dev->dev.kobj, "device"); | |
1580 | if (result) | |
1581 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | static int acpi_video_bus_register_backlight(struct acpi_video_bus *video) | |
1586 | { | |
1587 | struct acpi_video_device *dev; | |
1588 | ||
1589 | mutex_lock(&video->device_list_lock); | |
1590 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1591 | acpi_video_dev_register_backlight(dev); | |
1592 | mutex_unlock(&video->device_list_lock); | |
1593 | ||
1594 | video->pm_nb.notifier_call = acpi_video_resume; | |
1595 | video->pm_nb.priority = 0; | |
1596 | return register_pm_notifier(&video->pm_nb); | |
1597 | } | |
1598 | ||
1599 | static void acpi_video_dev_unregister_backlight(struct acpi_video_device *device) | |
1600 | { | |
1601 | if (device->backlight) { | |
1602 | backlight_device_unregister(device->backlight); | |
1603 | device->backlight = NULL; | |
1604 | } | |
1605 | if (device->brightness) { | |
1606 | kfree(device->brightness->levels); | |
1607 | kfree(device->brightness); | |
1608 | device->brightness = NULL; | |
1609 | } | |
1610 | if (device->cooling_dev) { | |
1611 | sysfs_remove_link(&device->dev->dev.kobj, "thermal_cooling"); | |
1612 | sysfs_remove_link(&device->cooling_dev->device.kobj, "device"); | |
1613 | thermal_cooling_device_unregister(device->cooling_dev); | |
1614 | device->cooling_dev = NULL; | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | static int acpi_video_bus_unregister_backlight(struct acpi_video_bus *video) | |
1619 | { | |
1620 | struct acpi_video_device *dev; | |
1621 | int error = unregister_pm_notifier(&video->pm_nb); | |
1622 | ||
1623 | mutex_lock(&video->device_list_lock); | |
1624 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1625 | acpi_video_dev_unregister_backlight(dev); | |
1626 | mutex_unlock(&video->device_list_lock); | |
1627 | ||
1628 | return error; | |
1629 | } | |
1630 | ||
1631 | static void acpi_video_dev_add_notify_handler(struct acpi_video_device *device) | |
1632 | { | |
1633 | acpi_status status; | |
1634 | struct acpi_device *adev = device->dev; | |
1635 | ||
1636 | status = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, | |
1637 | acpi_video_device_notify, device); | |
1638 | if (ACPI_FAILURE(status)) | |
1639 | dev_err(&adev->dev, "Error installing notify handler\n"); | |
1640 | else | |
1641 | device->flags.notify = 1; | |
1642 | } | |
1643 | ||
1644 | static int acpi_video_bus_add_notify_handler(struct acpi_video_bus *video) | |
1645 | { | |
1646 | struct input_dev *input; | |
1647 | struct acpi_video_device *dev; | |
1648 | int error; | |
1649 | ||
1650 | video->input = input = input_allocate_device(); | |
1651 | if (!input) { | |
1652 | error = -ENOMEM; | |
1653 | goto out; | |
1654 | } | |
1655 | ||
1656 | error = acpi_video_bus_start_devices(video); | |
1657 | if (error) | |
1658 | goto err_free_input; | |
1659 | ||
1660 | snprintf(video->phys, sizeof(video->phys), | |
1661 | "%s/video/input0", acpi_device_hid(video->device)); | |
1662 | ||
1663 | input->name = acpi_device_name(video->device); | |
1664 | input->phys = video->phys; | |
1665 | input->id.bustype = BUS_HOST; | |
1666 | input->id.product = 0x06; | |
1667 | input->dev.parent = &video->device->dev; | |
1668 | input->evbit[0] = BIT(EV_KEY); | |
1669 | set_bit(KEY_SWITCHVIDEOMODE, input->keybit); | |
1670 | set_bit(KEY_VIDEO_NEXT, input->keybit); | |
1671 | set_bit(KEY_VIDEO_PREV, input->keybit); | |
1672 | set_bit(KEY_BRIGHTNESS_CYCLE, input->keybit); | |
1673 | set_bit(KEY_BRIGHTNESSUP, input->keybit); | |
1674 | set_bit(KEY_BRIGHTNESSDOWN, input->keybit); | |
1675 | set_bit(KEY_BRIGHTNESS_ZERO, input->keybit); | |
1676 | set_bit(KEY_DISPLAY_OFF, input->keybit); | |
1677 | ||
1678 | error = input_register_device(input); | |
1679 | if (error) | |
1680 | goto err_stop_dev; | |
1681 | ||
1682 | mutex_lock(&video->device_list_lock); | |
1683 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1684 | acpi_video_dev_add_notify_handler(dev); | |
1685 | mutex_unlock(&video->device_list_lock); | |
1686 | ||
1687 | return 0; | |
1688 | ||
1689 | err_stop_dev: | |
1690 | acpi_video_bus_stop_devices(video); | |
1691 | err_free_input: | |
1692 | input_free_device(input); | |
1693 | video->input = NULL; | |
1694 | out: | |
1695 | return error; | |
1696 | } | |
1697 | ||
1698 | static void acpi_video_dev_remove_notify_handler(struct acpi_video_device *dev) | |
1699 | { | |
1700 | if (dev->flags.notify) { | |
1701 | acpi_remove_notify_handler(dev->dev->handle, ACPI_DEVICE_NOTIFY, | |
1702 | acpi_video_device_notify); | |
1703 | dev->flags.notify = 0; | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video) | |
1708 | { | |
1709 | struct acpi_video_device *dev; | |
1710 | ||
1711 | mutex_lock(&video->device_list_lock); | |
1712 | list_for_each_entry(dev, &video->video_device_list, entry) | |
1713 | acpi_video_dev_remove_notify_handler(dev); | |
1714 | mutex_unlock(&video->device_list_lock); | |
1715 | ||
1716 | acpi_video_bus_stop_devices(video); | |
1717 | input_unregister_device(video->input); | |
1718 | video->input = NULL; | |
1719 | } | |
1720 | ||
1721 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) | |
1722 | { | |
1723 | struct acpi_video_device *dev, *next; | |
1724 | ||
1725 | mutex_lock(&video->device_list_lock); | |
1726 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { | |
1727 | list_del(&dev->entry); | |
1728 | kfree(dev); | |
1729 | } | |
1730 | mutex_unlock(&video->device_list_lock); | |
1731 | ||
1732 | return 0; | |
1733 | } | |
1734 | ||
ac7729da RW |
1735 | static int instance; |
1736 | ||
4be44fcd | 1737 | static int acpi_video_bus_add(struct acpi_device *device) |
1da177e4 | 1738 | { |
f51e8391 | 1739 | struct acpi_video_bus *video; |
f51e8391 | 1740 | int error; |
c504f8cb ZR |
1741 | acpi_status status; |
1742 | ||
1743 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, | |
1744 | device->parent->handle, 1, | |
1745 | acpi_video_bus_match, NULL, | |
1746 | device, NULL); | |
1747 | if (status == AE_ALREADY_EXISTS) { | |
1748 | printk(KERN_WARNING FW_BUG | |
1749 | "Duplicate ACPI video bus devices for the" | |
1750 | " same VGA controller, please try module " | |
1751 | "parameter \"video.allow_duplicates=1\"" | |
1752 | "if the current driver doesn't work.\n"); | |
1753 | if (!allow_duplicates) | |
1754 | return -ENODEV; | |
1755 | } | |
1da177e4 | 1756 | |
36bcbec7 | 1757 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
1da177e4 | 1758 | if (!video) |
d550d98d | 1759 | return -ENOMEM; |
1da177e4 | 1760 | |
e6d9da1d ZR |
1761 | /* a hack to fix the duplicate name "VID" problem on T61 */ |
1762 | if (!strcmp(device->pnp.bus_id, "VID")) { | |
1763 | if (instance) | |
1764 | device->pnp.bus_id[3] = '0' + instance; | |
915ea7e4 | 1765 | instance++; |
e6d9da1d | 1766 | } |
f3b39f13 ZY |
1767 | /* a hack to fix the duplicate name "VGA" problem on Pa 3553 */ |
1768 | if (!strcmp(device->pnp.bus_id, "VGA")) { | |
1769 | if (instance) | |
1770 | device->pnp.bus_id[3] = '0' + instance; | |
1771 | instance++; | |
1772 | } | |
e6d9da1d | 1773 | |
e6afa0de | 1774 | video->device = device; |
1da177e4 LT |
1775 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
1776 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); | |
db89b4f0 | 1777 | device->driver_data = video; |
1da177e4 LT |
1778 | |
1779 | acpi_video_bus_find_cap(video); | |
f51e8391 DT |
1780 | error = acpi_video_bus_check(video); |
1781 | if (error) | |
1782 | goto err_free_video; | |
1da177e4 | 1783 | |
bbac81f5 | 1784 | mutex_init(&video->device_list_lock); |
1da177e4 LT |
1785 | INIT_LIST_HEAD(&video->video_device_list); |
1786 | ||
ea9f8856 IM |
1787 | error = acpi_video_bus_get_devices(video, device); |
1788 | if (error) | |
91e13aa3 | 1789 | goto err_put_video; |
1da177e4 | 1790 | |
1da177e4 | 1791 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
4be44fcd LB |
1792 | ACPI_VIDEO_DEVICE_NAME, acpi_device_bid(device), |
1793 | video->flags.multihead ? "yes" : "no", | |
1794 | video->flags.rom ? "yes" : "no", | |
1795 | video->flags.post ? "yes" : "no"); | |
67b662e1 AL |
1796 | mutex_lock(&video_list_lock); |
1797 | list_add_tail(&video->entry, &video_bus_head); | |
1798 | mutex_unlock(&video_list_lock); | |
1da177e4 | 1799 | |
67b662e1 AL |
1800 | acpi_video_bus_register_backlight(video); |
1801 | acpi_video_bus_add_notify_handler(video); | |
ac7729da | 1802 | |
f51e8391 DT |
1803 | return 0; |
1804 | ||
67b662e1 | 1805 | err_put_video: |
f51e8391 DT |
1806 | acpi_video_bus_put_devices(video); |
1807 | kfree(video->attached_array); | |
67b662e1 | 1808 | err_free_video: |
f51e8391 | 1809 | kfree(video); |
db89b4f0 | 1810 | device->driver_data = NULL; |
1da177e4 | 1811 | |
f51e8391 | 1812 | return error; |
1da177e4 LT |
1813 | } |
1814 | ||
51fac838 | 1815 | static int acpi_video_bus_remove(struct acpi_device *device) |
1da177e4 | 1816 | { |
4be44fcd | 1817 | struct acpi_video_bus *video = NULL; |
1da177e4 | 1818 | |
1da177e4 LT |
1819 | |
1820 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1821 | return -EINVAL; |
1da177e4 | 1822 | |
50dd0969 | 1823 | video = acpi_driver_data(device); |
1da177e4 | 1824 | |
67b662e1 AL |
1825 | acpi_video_bus_remove_notify_handler(video); |
1826 | acpi_video_bus_unregister_backlight(video); | |
1da177e4 | 1827 | acpi_video_bus_put_devices(video); |
1da177e4 | 1828 | |
67b662e1 AL |
1829 | mutex_lock(&video_list_lock); |
1830 | list_del(&video->entry); | |
1831 | mutex_unlock(&video_list_lock); | |
1832 | ||
6044ec88 | 1833 | kfree(video->attached_array); |
1da177e4 LT |
1834 | kfree(video); |
1835 | ||
d550d98d | 1836 | return 0; |
1da177e4 LT |
1837 | } |
1838 | ||
c6996bdd AC |
1839 | static int __init is_i740(struct pci_dev *dev) |
1840 | { | |
1841 | if (dev->device == 0x00D1) | |
1842 | return 1; | |
1843 | if (dev->device == 0x7000) | |
1844 | return 1; | |
1845 | return 0; | |
1846 | } | |
1847 | ||
74a365b3 MG |
1848 | static int __init intel_opregion_present(void) |
1849 | { | |
c6996bdd | 1850 | int opregion = 0; |
74a365b3 MG |
1851 | struct pci_dev *dev = NULL; |
1852 | u32 address; | |
1853 | ||
1854 | for_each_pci_dev(dev) { | |
1855 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) | |
1856 | continue; | |
1857 | if (dev->vendor != PCI_VENDOR_ID_INTEL) | |
1858 | continue; | |
c6996bdd AC |
1859 | /* We don't want to poke around undefined i740 registers */ |
1860 | if (is_i740(dev)) | |
1861 | continue; | |
74a365b3 MG |
1862 | pci_read_config_dword(dev, 0xfc, &address); |
1863 | if (!address) | |
1864 | continue; | |
c6996bdd | 1865 | opregion = 1; |
74a365b3 | 1866 | } |
c6996bdd | 1867 | return opregion; |
74a365b3 MG |
1868 | } |
1869 | ||
8e5c2b77 | 1870 | int acpi_video_register(void) |
1da177e4 | 1871 | { |
8e5c2b77 | 1872 | int result = 0; |
86e437f0 ZY |
1873 | if (register_count) { |
1874 | /* | |
8e5c2b77 RW |
1875 | * if the function of acpi_video_register is already called, |
1876 | * don't register the acpi_vide_bus again and return no error. | |
86e437f0 ZY |
1877 | */ |
1878 | return 0; | |
1879 | } | |
1da177e4 | 1880 | |
67b662e1 AL |
1881 | mutex_init(&video_list_lock); |
1882 | INIT_LIST_HEAD(&video_bus_head); | |
1883 | ||
1da177e4 | 1884 | result = acpi_bus_register_driver(&acpi_video_bus); |
39fe394d | 1885 | if (result < 0) |
d550d98d | 1886 | return -ENODEV; |
1da177e4 | 1887 | |
86e437f0 ZY |
1888 | /* |
1889 | * When the acpi_video_bus is loaded successfully, increase | |
1890 | * the counter reference. | |
1891 | */ | |
1892 | register_count = 1; | |
1893 | ||
d550d98d | 1894 | return 0; |
1da177e4 | 1895 | } |
8e5c2b77 | 1896 | EXPORT_SYMBOL(acpi_video_register); |
74a365b3 | 1897 | |
86e437f0 ZY |
1898 | void acpi_video_unregister(void) |
1899 | { | |
1900 | if (!register_count) { | |
1901 | /* | |
1902 | * If the acpi video bus is already unloaded, don't | |
1903 | * unload it again and return directly. | |
1904 | */ | |
1905 | return; | |
1906 | } | |
1907 | acpi_bus_unregister_driver(&acpi_video_bus); | |
1908 | ||
86e437f0 ZY |
1909 | register_count = 0; |
1910 | ||
1911 | return; | |
1912 | } | |
1913 | EXPORT_SYMBOL(acpi_video_unregister); | |
1914 | ||
74a365b3 MG |
1915 | /* |
1916 | * This is kind of nasty. Hardware using Intel chipsets may require | |
1917 | * the video opregion code to be run first in order to initialise | |
1918 | * state before any ACPI video calls are made. To handle this we defer | |
1919 | * registration of the video class until the opregion code has run. | |
1920 | */ | |
1921 | ||
1922 | static int __init acpi_video_init(void) | |
1923 | { | |
45cb50e6 ZR |
1924 | dmi_check_system(video_dmi_table); |
1925 | ||
74a365b3 MG |
1926 | if (intel_opregion_present()) |
1927 | return 0; | |
1928 | ||
1929 | return acpi_video_register(); | |
1930 | } | |
1da177e4 | 1931 | |
86e437f0 | 1932 | static void __exit acpi_video_exit(void) |
1da177e4 | 1933 | { |
86e437f0 | 1934 | acpi_video_unregister(); |
1da177e4 | 1935 | |
d550d98d | 1936 | return; |
1da177e4 LT |
1937 | } |
1938 | ||
1939 | module_init(acpi_video_init); | |
1940 | module_exit(acpi_video_exit); |