| 1 | /* |
| 2 | * video.c - ACPI Video Driver |
| 3 | * |
| 4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> |
| 5 | * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> |
| 6 | * Copyright (C) 2006 Thomas Tuttle <linux-kernel@ttuttle.net> |
| 7 | * |
| 8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or (at |
| 13 | * your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License along |
| 21 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 23 | * |
| 24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 25 | */ |
| 26 | |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/mutex.h> |
| 33 | #include <linux/input.h> |
| 34 | #include <linux/backlight.h> |
| 35 | #include <linux/thermal.h> |
| 36 | #include <linux/sort.h> |
| 37 | #include <linux/pci.h> |
| 38 | #include <linux/pci_ids.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <asm/uaccess.h> |
| 41 | #include <linux/dmi.h> |
| 42 | #include <acpi/acpi_bus.h> |
| 43 | #include <acpi/acpi_drivers.h> |
| 44 | #include <linux/suspend.h> |
| 45 | #include <acpi/video.h> |
| 46 | |
| 47 | #include "internal.h" |
| 48 | |
| 49 | #define PREFIX "ACPI: " |
| 50 | |
| 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 | |
| 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 |
| 64 | |
| 65 | #define MAX_NAME_LEN 20 |
| 66 | |
| 67 | #define _COMPONENT ACPI_VIDEO_COMPONENT |
| 68 | ACPI_MODULE_NAME("video"); |
| 69 | |
| 70 | MODULE_AUTHOR("Bruno Ducrot"); |
| 71 | MODULE_DESCRIPTION("ACPI Video Driver"); |
| 72 | MODULE_LICENSE("GPL"); |
| 73 | |
| 74 | static bool brightness_switch_enabled = 1; |
| 75 | module_param(brightness_switch_enabled, bool, 0644); |
| 76 | |
| 77 | /* |
| 78 | * By default, we don't allow duplicate ACPI video bus devices |
| 79 | * under the same VGA controller |
| 80 | */ |
| 81 | static bool allow_duplicates; |
| 82 | module_param(allow_duplicates, bool, 0644); |
| 83 | |
| 84 | /* |
| 85 | * Some BIOSes claim they use minimum backlight at boot, |
| 86 | * and this may bring dimming screen after boot |
| 87 | */ |
| 88 | static bool use_bios_initial_backlight = 1; |
| 89 | module_param(use_bios_initial_backlight, bool, 0644); |
| 90 | |
| 91 | static int register_count; |
| 92 | static int acpi_video_bus_add(struct acpi_device *device); |
| 93 | static int acpi_video_bus_remove(struct acpi_device *device); |
| 94 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event); |
| 95 | |
| 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 | |
| 102 | static struct acpi_driver acpi_video_bus = { |
| 103 | .name = "video", |
| 104 | .class = ACPI_VIDEO_CLASS, |
| 105 | .ids = video_device_ids, |
| 106 | .ops = { |
| 107 | .add = acpi_video_bus_add, |
| 108 | .remove = acpi_video_bus_remove, |
| 109 | .notify = acpi_video_bus_notify, |
| 110 | }, |
| 111 | }; |
| 112 | |
| 113 | struct acpi_video_bus_flags { |
| 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; |
| 118 | }; |
| 119 | |
| 120 | struct acpi_video_bus_cap { |
| 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 */ |
| 127 | u8 reserved:2; |
| 128 | }; |
| 129 | |
| 130 | struct acpi_video_device_attrib { |
| 131 | u32 display_index:4; /* A zero-based instance of the Display */ |
| 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 |
| 137 | the VGA device. */ |
| 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 */ |
| 141 | }; |
| 142 | |
| 143 | struct acpi_video_enumerated_device { |
| 144 | union { |
| 145 | u32 int_val; |
| 146 | struct acpi_video_device_attrib attrib; |
| 147 | } value; |
| 148 | struct acpi_video_device *bind_info; |
| 149 | }; |
| 150 | |
| 151 | struct acpi_video_bus { |
| 152 | struct acpi_device *device; |
| 153 | u8 dos_setting; |
| 154 | struct acpi_video_enumerated_device *attached_array; |
| 155 | u8 attached_count; |
| 156 | struct acpi_video_bus_cap cap; |
| 157 | struct acpi_video_bus_flags flags; |
| 158 | struct list_head video_device_list; |
| 159 | struct mutex device_list_lock; /* protects video_device_list */ |
| 160 | struct input_dev *input; |
| 161 | char phys[32]; /* for input device */ |
| 162 | struct notifier_block pm_nb; |
| 163 | }; |
| 164 | |
| 165 | struct acpi_video_device_flags { |
| 166 | u8 crt:1; |
| 167 | u8 lcd:1; |
| 168 | u8 tvout:1; |
| 169 | u8 dvi:1; |
| 170 | u8 bios:1; |
| 171 | u8 unknown:1; |
| 172 | u8 notify:1; |
| 173 | u8 reserved:1; |
| 174 | }; |
| 175 | |
| 176 | struct acpi_video_device_cap { |
| 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 */ |
| 180 | u8 _BQC:1; /* Get current brightness level */ |
| 181 | u8 _BCQ:1; /* Some buggy BIOS uses _BCQ instead of _BQC */ |
| 182 | u8 _DDC:1; /* Return the EDID for this device */ |
| 183 | }; |
| 184 | |
| 185 | struct acpi_video_brightness_flags { |
| 186 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ |
| 187 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
| 188 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
| 189 | }; |
| 190 | |
| 191 | struct acpi_video_device_brightness { |
| 192 | int curr; |
| 193 | int count; |
| 194 | int *levels; |
| 195 | struct acpi_video_brightness_flags flags; |
| 196 | }; |
| 197 | |
| 198 | struct acpi_video_device { |
| 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; |
| 205 | struct acpi_video_device_brightness *brightness; |
| 206 | struct backlight_device *backlight; |
| 207 | struct thermal_cooling_device *cooling_dev; |
| 208 | }; |
| 209 | |
| 210 | static const char device_decode[][30] = { |
| 211 | "motherboard VGA device", |
| 212 | "PCI VGA device", |
| 213 | "AGP VGA device", |
| 214 | "UNKNOWN", |
| 215 | }; |
| 216 | |
| 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); |
| 221 | static int acpi_video_device_enumerate(struct acpi_video_bus *video); |
| 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, |
| 226 | unsigned long long *level, bool raw); |
| 227 | static int acpi_video_get_next_level(struct acpi_video_device *device, |
| 228 | u32 level_current, u32 event); |
| 229 | static int acpi_video_switch_brightness(struct acpi_video_device *device, |
| 230 | int event); |
| 231 | |
| 232 | /* backlight device sysfs support */ |
| 233 | static int acpi_video_get_brightness(struct backlight_device *bd) |
| 234 | { |
| 235 | unsigned long long cur_level; |
| 236 | int i; |
| 237 | struct acpi_video_device *vd = bl_get_data(bd); |
| 238 | |
| 239 | if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) |
| 240 | return -EINVAL; |
| 241 | for (i = 2; i < vd->brightness->count; i++) { |
| 242 | if (vd->brightness->levels[i] == cur_level) |
| 243 | /* |
| 244 | * The first two entries are special - see page 575 |
| 245 | * of the ACPI spec 3.0 |
| 246 | */ |
| 247 | return i - 2; |
| 248 | } |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | static int acpi_video_set_brightness(struct backlight_device *bd) |
| 253 | { |
| 254 | int request_level = bd->props.brightness + 2; |
| 255 | struct acpi_video_device *vd = bl_get_data(bd); |
| 256 | |
| 257 | return acpi_video_device_lcd_set_level(vd, |
| 258 | vd->brightness->levels[request_level]); |
| 259 | } |
| 260 | |
| 261 | static const struct backlight_ops acpi_backlight_ops = { |
| 262 | .get_brightness = acpi_video_get_brightness, |
| 263 | .update_status = acpi_video_set_brightness, |
| 264 | }; |
| 265 | |
| 266 | /* thermal cooling device callbacks */ |
| 267 | static int video_get_max_state(struct thermal_cooling_device *cooling_dev, unsigned |
| 268 | long *state) |
| 269 | { |
| 270 | struct acpi_device *device = cooling_dev->devdata; |
| 271 | struct acpi_video_device *video = acpi_driver_data(device); |
| 272 | |
| 273 | *state = video->brightness->count - 3; |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsigned |
| 278 | long *state) |
| 279 | { |
| 280 | struct acpi_device *device = cooling_dev->devdata; |
| 281 | struct acpi_video_device *video = acpi_driver_data(device); |
| 282 | unsigned long long level; |
| 283 | int offset; |
| 284 | |
| 285 | if (acpi_video_device_lcd_get_level_current(video, &level, false)) |
| 286 | return -EINVAL; |
| 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 | } |
| 292 | |
| 293 | return -EINVAL; |
| 294 | } |
| 295 | |
| 296 | static int |
| 297 | video_set_cur_state(struct thermal_cooling_device *cooling_dev, unsigned long state) |
| 298 | { |
| 299 | struct acpi_device *device = cooling_dev->devdata; |
| 300 | struct acpi_video_device *video = acpi_driver_data(device); |
| 301 | int level; |
| 302 | |
| 303 | if (state >= video->brightness->count - 2) |
| 304 | return -EINVAL; |
| 305 | |
| 306 | state = video->brightness->count - state; |
| 307 | level = video->brightness->levels[state - 1]; |
| 308 | return acpi_video_device_lcd_set_level(video, level); |
| 309 | } |
| 310 | |
| 311 | static const struct thermal_cooling_device_ops video_cooling_ops = { |
| 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 | |
| 317 | /* |
| 318 | * -------------------------------------------------------------------------- |
| 319 | * Video Management |
| 320 | * -------------------------------------------------------------------------- |
| 321 | */ |
| 322 | |
| 323 | static int |
| 324 | acpi_video_device_lcd_query_levels(struct acpi_video_device *device, |
| 325 | union acpi_object **levels) |
| 326 | { |
| 327 | int status; |
| 328 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 329 | union acpi_object *obj; |
| 330 | |
| 331 | |
| 332 | *levels = NULL; |
| 333 | |
| 334 | status = acpi_evaluate_object(device->dev->handle, "_BCL", NULL, &buffer); |
| 335 | if (!ACPI_SUCCESS(status)) |
| 336 | return status; |
| 337 | obj = (union acpi_object *)buffer.pointer; |
| 338 | if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { |
| 339 | printk(KERN_ERR PREFIX "Invalid _BCL data\n"); |
| 340 | status = -EFAULT; |
| 341 | goto err; |
| 342 | } |
| 343 | |
| 344 | *levels = obj; |
| 345 | |
| 346 | return 0; |
| 347 | |
| 348 | err: |
| 349 | kfree(buffer.pointer); |
| 350 | |
| 351 | return status; |
| 352 | } |
| 353 | |
| 354 | static int |
| 355 | acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level) |
| 356 | { |
| 357 | int status; |
| 358 | int state; |
| 359 | |
| 360 | status = acpi_execute_simple_method(device->dev->handle, |
| 361 | "_BCM", level); |
| 362 | if (ACPI_FAILURE(status)) { |
| 363 | ACPI_ERROR((AE_INFO, "Evaluating _BCM failed")); |
| 364 | return -EIO; |
| 365 | } |
| 366 | |
| 367 | device->brightness->curr = level; |
| 368 | for (state = 2; state < device->brightness->count; state++) |
| 369 | if (level == device->brightness->levels[state]) { |
| 370 | if (device->backlight) |
| 371 | device->backlight->props.brightness = state - 2; |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | ACPI_ERROR((AE_INFO, "Current brightness invalid")); |
| 376 | return -EINVAL; |
| 377 | } |
| 378 | |
| 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 | |
| 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 | |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 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 | }, |
| 489 | {} |
| 490 | }; |
| 491 | |
| 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 | |
| 517 | static int |
| 518 | acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, |
| 519 | unsigned long long *level, bool raw) |
| 520 | { |
| 521 | acpi_status status = AE_OK; |
| 522 | int i; |
| 523 | |
| 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, |
| 528 | NULL, level); |
| 529 | if (ACPI_SUCCESS(status)) { |
| 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 | |
| 539 | *level = acpi_video_bqc_value_to_level(device, *level); |
| 540 | |
| 541 | for (i = 2; i < device->brightness->count; i++) |
| 542 | if (device->brightness->levels[i] == *level) { |
| 543 | device->brightness->curr = *level; |
| 544 | return 0; |
| 545 | } |
| 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; |
| 554 | } else { |
| 555 | /* |
| 556 | * Fixme: |
| 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 | */ |
| 563 | ACPI_WARNING((AE_INFO, "Evaluating %s failed", buf)); |
| 564 | device->cap._BQC = device->cap._BCQ = 0; |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | *level = device->brightness->curr; |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | static int |
| 573 | acpi_video_device_EDID(struct acpi_video_device *device, |
| 574 | union acpi_object **edid, ssize_t length) |
| 575 | { |
| 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 }; |
| 581 | |
| 582 | |
| 583 | *edid = NULL; |
| 584 | |
| 585 | if (!device) |
| 586 | return -ENODEV; |
| 587 | if (length == 128) |
| 588 | arg0.integer.value = 1; |
| 589 | else if (length == 256) |
| 590 | arg0.integer.value = 2; |
| 591 | else |
| 592 | return -EINVAL; |
| 593 | |
| 594 | status = acpi_evaluate_object(device->dev->handle, "_DDC", &args, &buffer); |
| 595 | if (ACPI_FAILURE(status)) |
| 596 | return -ENODEV; |
| 597 | |
| 598 | obj = buffer.pointer; |
| 599 | |
| 600 | if (obj && obj->type == ACPI_TYPE_BUFFER) |
| 601 | *edid = obj; |
| 602 | else { |
| 603 | printk(KERN_ERR PREFIX "Invalid _DDC data\n"); |
| 604 | status = -EFAULT; |
| 605 | kfree(obj); |
| 606 | } |
| 607 | |
| 608 | return status; |
| 609 | } |
| 610 | |
| 611 | /* bus */ |
| 612 | |
| 613 | /* |
| 614 | * Arg: |
| 615 | * video : video bus device pointer |
| 616 | * bios_flag : |
| 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 |
| 620 | * active display output. No switch event. |
| 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 |
| 627 | * of the LCD when the power changes from AC to DC |
| 628 | * 1. The system BIOS should NOT automatically control the brightness |
| 629 | * level of the LCD when the power changes from AC to DC. |
| 630 | * Return Value: |
| 631 | * -EINVAL wrong arg. |
| 632 | */ |
| 633 | |
| 634 | static int |
| 635 | acpi_video_bus_DOS(struct acpi_video_bus *video, int bios_flag, int lcd_flag) |
| 636 | { |
| 637 | acpi_status status; |
| 638 | |
| 639 | if (!video->cap._DOS) |
| 640 | return 0; |
| 641 | |
| 642 | if (bios_flag < 0 || bios_flag > 3 || lcd_flag < 0 || lcd_flag > 1) |
| 643 | return -EINVAL; |
| 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); |
| 647 | if (ACPI_FAILURE(status)) |
| 648 | return -EIO; |
| 649 | |
| 650 | return 0; |
| 651 | } |
| 652 | |
| 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 | |
| 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 | */ |
| 686 | test_level = current_level == max_level ? br->levels[3] : max_level; |
| 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 | |
| 713 | /* |
| 714 | * Arg: |
| 715 | * device : video output device (LCD, CRT, ..) |
| 716 | * |
| 717 | * Return Value: |
| 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; |
| 727 | int i, max_level = 0, count = 0, level_ac_battery = 0; |
| 728 | unsigned long long level, level_old; |
| 729 | union acpi_object *o; |
| 730 | struct acpi_video_device_brightness *br = NULL; |
| 731 | int result = -EINVAL; |
| 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"); |
| 745 | result = -ENOMEM; |
| 746 | goto out; |
| 747 | } |
| 748 | |
| 749 | br->levels = kmalloc((obj->package.count + 2) * sizeof *(br->levels), |
| 750 | GFP_KERNEL); |
| 751 | if (!br->levels) { |
| 752 | result = -ENOMEM; |
| 753 | goto out_free; |
| 754 | } |
| 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 | |
| 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 | */ |
| 775 | for (i = 2; i < count; i++) { |
| 776 | if (br->levels[i] == br->levels[0]) |
| 777 | level_ac_battery++; |
| 778 | if (br->levels[i] == br->levels[1]) |
| 779 | level_ac_battery++; |
| 780 | } |
| 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) |
| 789 | ACPI_ERROR((AE_INFO, "Too many duplicates in _BCL package")); |
| 790 | |
| 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, |
| 798 | "Found unordered _BCL package")); |
| 799 | |
| 800 | br->count = count; |
| 801 | device->brightness = br; |
| 802 | |
| 803 | /* _BQC uses INDEX while _BCL uses VALUE in some laptops */ |
| 804 | br->curr = level = max_level; |
| 805 | |
| 806 | if (!device->cap._BQC) |
| 807 | goto set_level; |
| 808 | |
| 809 | result = acpi_video_device_lcd_get_level_current(device, |
| 810 | &level_old, true); |
| 811 | if (result) |
| 812 | goto out_free_levels; |
| 813 | |
| 814 | result = acpi_video_bqc_quirk(device, max_level, level_old); |
| 815 | if (result) |
| 816 | goto out_free_levels; |
| 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; |
| 823 | |
| 824 | if (use_bios_initial_backlight) { |
| 825 | level = acpi_video_bqc_value_to_level(device, level_old); |
| 826 | /* |
| 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. |
| 831 | */ |
| 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; |
| 837 | } |
| 838 | |
| 839 | set_level: |
| 840 | result = acpi_video_device_lcd_set_level(device, level); |
| 841 | if (result) |
| 842 | goto out_free_levels; |
| 843 | |
| 844 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 845 | "found %d brightness levels\n", count - 2)); |
| 846 | kfree(obj); |
| 847 | return result; |
| 848 | |
| 849 | out_free_levels: |
| 850 | kfree(br->levels); |
| 851 | out_free: |
| 852 | kfree(br); |
| 853 | out: |
| 854 | device->brightness = NULL; |
| 855 | kfree(obj); |
| 856 | return result; |
| 857 | } |
| 858 | |
| 859 | /* |
| 860 | * Arg: |
| 861 | * device : video output device (LCD, CRT, ..) |
| 862 | * |
| 863 | * Return Value: |
| 864 | * None |
| 865 | * |
| 866 | * Find out all required AML methods defined under the output |
| 867 | * device. |
| 868 | */ |
| 869 | |
| 870 | static void acpi_video_device_find_cap(struct acpi_video_device *device) |
| 871 | { |
| 872 | if (acpi_has_method(device->dev->handle, "_ADR")) |
| 873 | device->cap._ADR = 1; |
| 874 | if (acpi_has_method(device->dev->handle, "_BCL")) |
| 875 | device->cap._BCL = 1; |
| 876 | if (acpi_has_method(device->dev->handle, "_BCM")) |
| 877 | device->cap._BCM = 1; |
| 878 | if (acpi_has_method(device->dev->handle, "_BQC")) { |
| 879 | device->cap._BQC = 1; |
| 880 | } else if (acpi_has_method(device->dev->handle, "_BCQ")) { |
| 881 | printk(KERN_WARNING FW_BUG "_BCQ is used instead of _BQC\n"); |
| 882 | device->cap._BCQ = 1; |
| 883 | } |
| 884 | |
| 885 | if (acpi_has_method(device->dev->handle, "_DDC")) |
| 886 | device->cap._DDC = 1; |
| 887 | |
| 888 | if (acpi_video_backlight_support()) { |
| 889 | struct backlight_properties props; |
| 890 | struct pci_dev *pdev; |
| 891 | acpi_handle acpi_parent; |
| 892 | struct device *parent = NULL; |
| 893 | int result; |
| 894 | static int count; |
| 895 | char *name; |
| 896 | |
| 897 | result = acpi_video_init_brightness(device); |
| 898 | if (result) |
| 899 | return; |
| 900 | name = kasprintf(GFP_KERNEL, "acpi_video%d", count); |
| 901 | if (!name) |
| 902 | return; |
| 903 | count++; |
| 904 | |
| 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 | |
| 913 | memset(&props, 0, sizeof(struct backlight_properties)); |
| 914 | props.type = BACKLIGHT_FIRMWARE; |
| 915 | props.max_brightness = device->brightness->count - 3; |
| 916 | device->backlight = backlight_device_register(name, |
| 917 | parent, |
| 918 | device, |
| 919 | &acpi_backlight_ops, |
| 920 | &props); |
| 921 | kfree(name); |
| 922 | if (IS_ERR(device->backlight)) |
| 923 | return; |
| 924 | |
| 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); |
| 931 | |
| 932 | device->cooling_dev = thermal_cooling_device_register("LCD", |
| 933 | device->dev, &video_cooling_ops); |
| 934 | if (IS_ERR(device->cooling_dev)) { |
| 935 | /* |
| 936 | * Set cooling_dev to NULL so we don't crash trying to |
| 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 | */ |
| 943 | device->cooling_dev = NULL; |
| 944 | return; |
| 945 | } |
| 946 | |
| 947 | dev_info(&device->dev->dev, "registered as cooling_device%d\n", |
| 948 | device->cooling_dev->id); |
| 949 | result = sysfs_create_link(&device->dev->dev.kobj, |
| 950 | &device->cooling_dev->device.kobj, |
| 951 | "thermal_cooling"); |
| 952 | if (result) |
| 953 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| 954 | result = sysfs_create_link(&device->cooling_dev->device.kobj, |
| 955 | &device->dev->dev.kobj, "device"); |
| 956 | if (result) |
| 957 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| 958 | |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | /* |
| 963 | * Arg: |
| 964 | * device : video output device (VGA) |
| 965 | * |
| 966 | * Return Value: |
| 967 | * None |
| 968 | * |
| 969 | * Find out all required AML methods defined under the video bus device. |
| 970 | */ |
| 971 | |
| 972 | static void acpi_video_bus_find_cap(struct acpi_video_bus *video) |
| 973 | { |
| 974 | if (acpi_has_method(video->device->handle, "_DOS")) |
| 975 | video->cap._DOS = 1; |
| 976 | if (acpi_has_method(video->device->handle, "_DOD")) |
| 977 | video->cap._DOD = 1; |
| 978 | if (acpi_has_method(video->device->handle, "_ROM")) |
| 979 | video->cap._ROM = 1; |
| 980 | if (acpi_has_method(video->device->handle, "_GPD")) |
| 981 | video->cap._GPD = 1; |
| 982 | if (acpi_has_method(video->device->handle, "_SPD")) |
| 983 | video->cap._SPD = 1; |
| 984 | if (acpi_has_method(video->device->handle, "_VPO")) |
| 985 | video->cap._VPO = 1; |
| 986 | } |
| 987 | |
| 988 | /* |
| 989 | * Check whether the video bus device has required AML method to |
| 990 | * support the desired features |
| 991 | */ |
| 992 | |
| 993 | static int acpi_video_bus_check(struct acpi_video_bus *video) |
| 994 | { |
| 995 | acpi_status status = -ENOENT; |
| 996 | struct pci_dev *dev; |
| 997 | |
| 998 | if (!video) |
| 999 | return -EINVAL; |
| 1000 | |
| 1001 | dev = acpi_get_pci_dev(video->device->handle); |
| 1002 | if (!dev) |
| 1003 | return -ENODEV; |
| 1004 | pci_dev_put(dev); |
| 1005 | |
| 1006 | /* |
| 1007 | * Since there is no HID, CID and so on for VGA driver, we have |
| 1008 | * to check well known required nodes. |
| 1009 | */ |
| 1010 | |
| 1011 | /* Does this device support video switching? */ |
| 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 | } |
| 1018 | video->flags.multihead = 1; |
| 1019 | status = 0; |
| 1020 | } |
| 1021 | |
| 1022 | /* Does this device support retrieving a video ROM? */ |
| 1023 | if (video->cap._ROM) { |
| 1024 | video->flags.rom = 1; |
| 1025 | status = 0; |
| 1026 | } |
| 1027 | |
| 1028 | /* Does this device support configuring which video device to POST? */ |
| 1029 | if (video->cap._GPD && video->cap._SPD && video->cap._VPO) { |
| 1030 | video->flags.post = 1; |
| 1031 | status = 0; |
| 1032 | } |
| 1033 | |
| 1034 | return status; |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * -------------------------------------------------------------------------- |
| 1039 | * Driver Interface |
| 1040 | * -------------------------------------------------------------------------- |
| 1041 | */ |
| 1042 | |
| 1043 | /* device interface */ |
| 1044 | static struct acpi_video_device_attrib * |
| 1045 | acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id) |
| 1046 | { |
| 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 | } |
| 1055 | |
| 1056 | return NULL; |
| 1057 | } |
| 1058 | |
| 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 | |
| 1075 | static int |
| 1076 | acpi_video_bus_get_one_device(struct acpi_device *device, |
| 1077 | struct acpi_video_bus *video) |
| 1078 | { |
| 1079 | unsigned long long device_id; |
| 1080 | int status, device_type; |
| 1081 | struct acpi_video_device *data; |
| 1082 | struct acpi_video_device_attrib *attribute; |
| 1083 | |
| 1084 | status = |
| 1085 | acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id); |
| 1086 | /* Some device omits _ADR, we skip them instead of fail */ |
| 1087 | if (ACPI_FAILURE(status)) |
| 1088 | return 0; |
| 1089 | |
| 1090 | data = kzalloc(sizeof(struct acpi_video_device), GFP_KERNEL); |
| 1091 | if (!data) |
| 1092 | return -ENOMEM; |
| 1093 | |
| 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 | |
| 1104 | if (attribute && attribute->device_id_scheme) { |
| 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 | } |
| 1122 | if (attribute->bios_can_detect) |
| 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) { |
| 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; |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | acpi_video_device_bind(video, data); |
| 1144 | acpi_video_device_find_cap(data); |
| 1145 | |
| 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; |
| 1152 | |
| 1153 | mutex_lock(&video->device_list_lock); |
| 1154 | list_add_tail(&data->entry, &video->video_device_list); |
| 1155 | mutex_unlock(&video->device_list_lock); |
| 1156 | |
| 1157 | return status; |
| 1158 | } |
| 1159 | |
| 1160 | /* |
| 1161 | * Arg: |
| 1162 | * video : video bus device |
| 1163 | * |
| 1164 | * Return: |
| 1165 | * none |
| 1166 | * |
| 1167 | * Enumerate the video device list of the video bus, |
| 1168 | * bind the ids with the corresponding video devices |
| 1169 | * under the video bus. |
| 1170 | */ |
| 1171 | |
| 1172 | static void acpi_video_device_rebind(struct acpi_video_bus *video) |
| 1173 | { |
| 1174 | struct acpi_video_device *dev; |
| 1175 | |
| 1176 | mutex_lock(&video->device_list_lock); |
| 1177 | |
| 1178 | list_for_each_entry(dev, &video->video_device_list, entry) |
| 1179 | acpi_video_device_bind(video, dev); |
| 1180 | |
| 1181 | mutex_unlock(&video->device_list_lock); |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * Arg: |
| 1186 | * video : video bus device |
| 1187 | * device : video output device under the video |
| 1188 | * bus |
| 1189 | * |
| 1190 | * Return: |
| 1191 | * none |
| 1192 | * |
| 1193 | * Bind the ids with the corresponding video devices |
| 1194 | * under the video bus. |
| 1195 | */ |
| 1196 | |
| 1197 | static void |
| 1198 | acpi_video_device_bind(struct acpi_video_bus *video, |
| 1199 | struct acpi_video_device *device) |
| 1200 | { |
| 1201 | struct acpi_video_enumerated_device *ids; |
| 1202 | int i; |
| 1203 | |
| 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; |
| 1208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "device_bind %d\n", i)); |
| 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | /* |
| 1214 | * Arg: |
| 1215 | * video : video bus device |
| 1216 | * |
| 1217 | * Return: |
| 1218 | * < 0 : error |
| 1219 | * |
| 1220 | * Call _DOD to enumerate all devices attached to display adapter |
| 1221 | * |
| 1222 | */ |
| 1223 | |
| 1224 | static int acpi_video_device_enumerate(struct acpi_video_bus *video) |
| 1225 | { |
| 1226 | int status; |
| 1227 | int count; |
| 1228 | int i; |
| 1229 | struct acpi_video_enumerated_device *active_list; |
| 1230 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 1231 | union acpi_object *dod = NULL; |
| 1232 | union acpi_object *obj; |
| 1233 | |
| 1234 | status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer); |
| 1235 | if (!ACPI_SUCCESS(status)) { |
| 1236 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD")); |
| 1237 | return status; |
| 1238 | } |
| 1239 | |
| 1240 | dod = buffer.pointer; |
| 1241 | if (!dod || (dod->type != ACPI_TYPE_PACKAGE)) { |
| 1242 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _DOD data")); |
| 1243 | status = -EFAULT; |
| 1244 | goto out; |
| 1245 | } |
| 1246 | |
| 1247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d video heads in _DOD\n", |
| 1248 | dod->package.count)); |
| 1249 | |
| 1250 | active_list = kcalloc(1 + dod->package.count, |
| 1251 | sizeof(struct acpi_video_enumerated_device), |
| 1252 | GFP_KERNEL); |
| 1253 | if (!active_list) { |
| 1254 | status = -ENOMEM; |
| 1255 | goto out; |
| 1256 | } |
| 1257 | |
| 1258 | count = 0; |
| 1259 | for (i = 0; i < dod->package.count; i++) { |
| 1260 | obj = &dod->package.elements[i]; |
| 1261 | |
| 1262 | if (obj->type != ACPI_TYPE_INTEGER) { |
| 1263 | printk(KERN_ERR PREFIX |
| 1264 | "Invalid _DOD data in element %d\n", i); |
| 1265 | continue; |
| 1266 | } |
| 1267 | |
| 1268 | active_list[count].value.int_val = obj->integer.value; |
| 1269 | active_list[count].bind_info = NULL; |
| 1270 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "dod element[%d] = %d\n", i, |
| 1271 | (int)obj->integer.value)); |
| 1272 | count++; |
| 1273 | } |
| 1274 | |
| 1275 | kfree(video->attached_array); |
| 1276 | |
| 1277 | video->attached_array = active_list; |
| 1278 | video->attached_count = count; |
| 1279 | |
| 1280 | out: |
| 1281 | kfree(buffer.pointer); |
| 1282 | return status; |
| 1283 | } |
| 1284 | |
| 1285 | static int |
| 1286 | acpi_video_get_next_level(struct acpi_video_device *device, |
| 1287 | u32 level_current, u32 event) |
| 1288 | { |
| 1289 | int min, max, min_above, max_below, i, l, delta = 255; |
| 1290 | max = max_below = 0; |
| 1291 | min = min_above = 255; |
| 1292 | /* Find closest level to level_current */ |
| 1293 | for (i = 2; i < device->brightness->count; i++) { |
| 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; |
| 1303 | for (i = 2; i < device->brightness->count; i++) { |
| 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 | } |
| 1328 | } |
| 1329 | |
| 1330 | static int |
| 1331 | acpi_video_switch_brightness(struct acpi_video_device *device, int event) |
| 1332 | { |
| 1333 | unsigned long long level_current, level_next; |
| 1334 | int result = -EINVAL; |
| 1335 | |
| 1336 | /* no warning message if acpi_backlight=vendor is used */ |
| 1337 | if (!acpi_video_backlight_support()) |
| 1338 | return 0; |
| 1339 | |
| 1340 | if (!device->brightness) |
| 1341 | goto out; |
| 1342 | |
| 1343 | result = acpi_video_device_lcd_get_level_current(device, |
| 1344 | &level_current, |
| 1345 | false); |
| 1346 | if (result) |
| 1347 | goto out; |
| 1348 | |
| 1349 | level_next = acpi_video_get_next_level(device, level_current, event); |
| 1350 | |
| 1351 | result = acpi_video_device_lcd_set_level(device, level_next); |
| 1352 | |
| 1353 | if (!result) |
| 1354 | backlight_force_update(device->backlight, |
| 1355 | BACKLIGHT_UPDATE_HOTKEY); |
| 1356 | |
| 1357 | out: |
| 1358 | if (result) |
| 1359 | printk(KERN_ERR PREFIX "Failed to switch the brightness\n"); |
| 1360 | |
| 1361 | return result; |
| 1362 | } |
| 1363 | |
| 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 | |
| 1385 | if (!video_device->cap._DDC) |
| 1386 | continue; |
| 1387 | |
| 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 | |
| 1432 | static int |
| 1433 | acpi_video_bus_get_devices(struct acpi_video_bus *video, |
| 1434 | struct acpi_device *device) |
| 1435 | { |
| 1436 | int status = 0; |
| 1437 | struct acpi_device *dev; |
| 1438 | |
| 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); |
| 1445 | |
| 1446 | list_for_each_entry(dev, &device->children, node) { |
| 1447 | |
| 1448 | status = acpi_video_bus_get_one_device(dev, video); |
| 1449 | if (status) { |
| 1450 | dev_err(&dev->dev, "Can't attach device\n"); |
| 1451 | break; |
| 1452 | } |
| 1453 | } |
| 1454 | return status; |
| 1455 | } |
| 1456 | |
| 1457 | static int acpi_video_bus_put_one_device(struct acpi_video_device *device) |
| 1458 | { |
| 1459 | acpi_status status; |
| 1460 | |
| 1461 | if (!device || !device->video) |
| 1462 | return -ENOENT; |
| 1463 | |
| 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"); |
| 1470 | } |
| 1471 | |
| 1472 | if (device->backlight) { |
| 1473 | backlight_device_unregister(device->backlight); |
| 1474 | device->backlight = NULL; |
| 1475 | } |
| 1476 | if (device->cooling_dev) { |
| 1477 | sysfs_remove_link(&device->dev->dev.kobj, |
| 1478 | "thermal_cooling"); |
| 1479 | sysfs_remove_link(&device->cooling_dev->device.kobj, |
| 1480 | "device"); |
| 1481 | thermal_cooling_device_unregister(device->cooling_dev); |
| 1482 | device->cooling_dev = NULL; |
| 1483 | } |
| 1484 | |
| 1485 | return 0; |
| 1486 | } |
| 1487 | |
| 1488 | static int acpi_video_bus_put_devices(struct acpi_video_bus *video) |
| 1489 | { |
| 1490 | int status; |
| 1491 | struct acpi_video_device *dev, *next; |
| 1492 | |
| 1493 | mutex_lock(&video->device_list_lock); |
| 1494 | |
| 1495 | list_for_each_entry_safe(dev, next, &video->video_device_list, entry) { |
| 1496 | |
| 1497 | status = acpi_video_bus_put_one_device(dev); |
| 1498 | if (ACPI_FAILURE(status)) |
| 1499 | printk(KERN_WARNING PREFIX |
| 1500 | "hhuuhhuu bug in acpi video driver.\n"); |
| 1501 | |
| 1502 | if (dev->brightness) { |
| 1503 | kfree(dev->brightness->levels); |
| 1504 | kfree(dev->brightness); |
| 1505 | } |
| 1506 | list_del(&dev->entry); |
| 1507 | kfree(dev); |
| 1508 | } |
| 1509 | |
| 1510 | mutex_unlock(&video->device_list_lock); |
| 1511 | |
| 1512 | return 0; |
| 1513 | } |
| 1514 | |
| 1515 | /* acpi_video interface */ |
| 1516 | |
| 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 | */ |
| 1521 | static int acpi_video_bus_start_devices(struct acpi_video_bus *video) |
| 1522 | { |
| 1523 | return acpi_video_bus_DOS(video, 0, |
| 1524 | acpi_video_backlight_quirks() ? 1 : 0); |
| 1525 | } |
| 1526 | |
| 1527 | static int acpi_video_bus_stop_devices(struct acpi_video_bus *video) |
| 1528 | { |
| 1529 | return acpi_video_bus_DOS(video, 0, |
| 1530 | acpi_video_backlight_quirks() ? 0 : 1); |
| 1531 | } |
| 1532 | |
| 1533 | static void acpi_video_bus_notify(struct acpi_device *device, u32 event) |
| 1534 | { |
| 1535 | struct acpi_video_bus *video = acpi_driver_data(device); |
| 1536 | struct input_dev *input; |
| 1537 | int keycode = 0; |
| 1538 | |
| 1539 | if (!video) |
| 1540 | return; |
| 1541 | |
| 1542 | input = video->input; |
| 1543 | |
| 1544 | switch (event) { |
| 1545 | case ACPI_VIDEO_NOTIFY_SWITCH: /* User requested a switch, |
| 1546 | * most likely via hotkey. */ |
| 1547 | keycode = KEY_SWITCHVIDEOMODE; |
| 1548 | break; |
| 1549 | |
| 1550 | case ACPI_VIDEO_NOTIFY_PROBE: /* User plugged in or removed a video |
| 1551 | * connector. */ |
| 1552 | acpi_video_device_enumerate(video); |
| 1553 | acpi_video_device_rebind(video); |
| 1554 | keycode = KEY_SWITCHVIDEOMODE; |
| 1555 | break; |
| 1556 | |
| 1557 | case ACPI_VIDEO_NOTIFY_CYCLE: /* Cycle Display output hotkey pressed. */ |
| 1558 | keycode = KEY_SWITCHVIDEOMODE; |
| 1559 | break; |
| 1560 | case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT: /* Next Display output hotkey pressed. */ |
| 1561 | keycode = KEY_VIDEO_NEXT; |
| 1562 | break; |
| 1563 | case ACPI_VIDEO_NOTIFY_PREV_OUTPUT: /* previous Display output hotkey pressed. */ |
| 1564 | keycode = KEY_VIDEO_PREV; |
| 1565 | break; |
| 1566 | |
| 1567 | default: |
| 1568 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1569 | "Unsupported event [0x%x]\n", event)); |
| 1570 | break; |
| 1571 | } |
| 1572 | |
| 1573 | if (acpi_notifier_call_chain(device, event, 0)) |
| 1574 | /* Something vetoed the keypress. */ |
| 1575 | keycode = 0; |
| 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 | } |
| 1583 | |
| 1584 | return; |
| 1585 | } |
| 1586 | |
| 1587 | static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) |
| 1588 | { |
| 1589 | struct acpi_video_device *video_device = data; |
| 1590 | struct acpi_device *device = NULL; |
| 1591 | struct acpi_video_bus *bus; |
| 1592 | struct input_dev *input; |
| 1593 | int keycode = 0; |
| 1594 | |
| 1595 | if (!video_device) |
| 1596 | return; |
| 1597 | |
| 1598 | device = video_device->dev; |
| 1599 | bus = video_device->video; |
| 1600 | input = bus->input; |
| 1601 | |
| 1602 | switch (event) { |
| 1603 | case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ |
| 1604 | if (brightness_switch_enabled) |
| 1605 | acpi_video_switch_brightness(video_device, event); |
| 1606 | keycode = KEY_BRIGHTNESS_CYCLE; |
| 1607 | break; |
| 1608 | case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ |
| 1609 | if (brightness_switch_enabled) |
| 1610 | acpi_video_switch_brightness(video_device, event); |
| 1611 | keycode = KEY_BRIGHTNESSUP; |
| 1612 | break; |
| 1613 | case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ |
| 1614 | if (brightness_switch_enabled) |
| 1615 | acpi_video_switch_brightness(video_device, event); |
| 1616 | keycode = KEY_BRIGHTNESSDOWN; |
| 1617 | break; |
| 1618 | case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightness */ |
| 1619 | if (brightness_switch_enabled) |
| 1620 | acpi_video_switch_brightness(video_device, event); |
| 1621 | keycode = KEY_BRIGHTNESS_ZERO; |
| 1622 | break; |
| 1623 | case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ |
| 1624 | if (brightness_switch_enabled) |
| 1625 | acpi_video_switch_brightness(video_device, event); |
| 1626 | keycode = KEY_DISPLAY_OFF; |
| 1627 | break; |
| 1628 | default: |
| 1629 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1630 | "Unsupported event [0x%x]\n", event)); |
| 1631 | break; |
| 1632 | } |
| 1633 | |
| 1634 | acpi_notifier_call_chain(device, event, 0); |
| 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 | } |
| 1642 | |
| 1643 | return; |
| 1644 | } |
| 1645 | |
| 1646 | static int acpi_video_resume(struct notifier_block *nb, |
| 1647 | unsigned long val, void *ign) |
| 1648 | { |
| 1649 | struct acpi_video_bus *video; |
| 1650 | struct acpi_video_device *video_device; |
| 1651 | int i; |
| 1652 | |
| 1653 | switch (val) { |
| 1654 | case PM_HIBERNATION_PREPARE: |
| 1655 | case PM_SUSPEND_PREPARE: |
| 1656 | case PM_RESTORE_PREPARE: |
| 1657 | return NOTIFY_DONE; |
| 1658 | } |
| 1659 | |
| 1660 | video = container_of(nb, struct acpi_video_bus, pm_nb); |
| 1661 | |
| 1662 | dev_info(&video->device->dev, "Restoring backlight state\n"); |
| 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 | } |
| 1669 | |
| 1670 | return NOTIFY_OK; |
| 1671 | } |
| 1672 | |
| 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 | |
| 1694 | static int instance; |
| 1695 | |
| 1696 | static int acpi_video_bus_add(struct acpi_device *device) |
| 1697 | { |
| 1698 | struct acpi_video_bus *video; |
| 1699 | struct input_dev *input; |
| 1700 | int error; |
| 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 | } |
| 1716 | |
| 1717 | video = kzalloc(sizeof(struct acpi_video_bus), GFP_KERNEL); |
| 1718 | if (!video) |
| 1719 | return -ENOMEM; |
| 1720 | |
| 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; |
| 1725 | instance++; |
| 1726 | } |
| 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 | } |
| 1733 | |
| 1734 | video->device = device; |
| 1735 | strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME); |
| 1736 | strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS); |
| 1737 | device->driver_data = video; |
| 1738 | |
| 1739 | acpi_video_bus_find_cap(video); |
| 1740 | error = acpi_video_bus_check(video); |
| 1741 | if (error) |
| 1742 | goto err_free_video; |
| 1743 | |
| 1744 | mutex_init(&video->device_list_lock); |
| 1745 | INIT_LIST_HEAD(&video->video_device_list); |
| 1746 | |
| 1747 | error = acpi_video_bus_get_devices(video, device); |
| 1748 | if (error) |
| 1749 | goto err_put_video; |
| 1750 | |
| 1751 | video->input = input = input_allocate_device(); |
| 1752 | if (!input) { |
| 1753 | error = -ENOMEM; |
| 1754 | goto err_put_video; |
| 1755 | } |
| 1756 | |
| 1757 | error = acpi_video_bus_start_devices(video); |
| 1758 | if (error) |
| 1759 | goto err_free_input_dev; |
| 1760 | |
| 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; |
| 1768 | input->dev.parent = &device->dev; |
| 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); |
| 1778 | |
| 1779 | printk(KERN_INFO PREFIX "%s [%s] (multi-head: %s rom: %s post: %s)\n", |
| 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"); |
| 1784 | |
| 1785 | video->pm_nb.notifier_call = acpi_video_resume; |
| 1786 | video->pm_nb.priority = 0; |
| 1787 | error = register_pm_notifier(&video->pm_nb); |
| 1788 | if (error) |
| 1789 | goto err_stop_video; |
| 1790 | |
| 1791 | error = input_register_device(input); |
| 1792 | if (error) |
| 1793 | goto err_unregister_pm_notifier; |
| 1794 | |
| 1795 | return 0; |
| 1796 | |
| 1797 | err_unregister_pm_notifier: |
| 1798 | unregister_pm_notifier(&video->pm_nb); |
| 1799 | err_stop_video: |
| 1800 | acpi_video_bus_stop_devices(video); |
| 1801 | err_free_input_dev: |
| 1802 | input_free_device(input); |
| 1803 | err_put_video: |
| 1804 | acpi_video_bus_put_devices(video); |
| 1805 | kfree(video->attached_array); |
| 1806 | err_free_video: |
| 1807 | kfree(video); |
| 1808 | device->driver_data = NULL; |
| 1809 | |
| 1810 | return error; |
| 1811 | } |
| 1812 | |
| 1813 | static int acpi_video_bus_remove(struct acpi_device *device) |
| 1814 | { |
| 1815 | struct acpi_video_bus *video = NULL; |
| 1816 | |
| 1817 | |
| 1818 | if (!device || !acpi_driver_data(device)) |
| 1819 | return -EINVAL; |
| 1820 | |
| 1821 | video = acpi_driver_data(device); |
| 1822 | |
| 1823 | unregister_pm_notifier(&video->pm_nb); |
| 1824 | |
| 1825 | acpi_video_bus_stop_devices(video); |
| 1826 | acpi_video_bus_put_devices(video); |
| 1827 | |
| 1828 | input_unregister_device(video->input); |
| 1829 | kfree(video->attached_array); |
| 1830 | kfree(video); |
| 1831 | |
| 1832 | return 0; |
| 1833 | } |
| 1834 | |
| 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 | |
| 1844 | static int __init intel_opregion_present(void) |
| 1845 | { |
| 1846 | int opregion = 0; |
| 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; |
| 1855 | /* We don't want to poke around undefined i740 registers */ |
| 1856 | if (is_i740(dev)) |
| 1857 | continue; |
| 1858 | pci_read_config_dword(dev, 0xfc, &address); |
| 1859 | if (!address) |
| 1860 | continue; |
| 1861 | opregion = 1; |
| 1862 | } |
| 1863 | return opregion; |
| 1864 | } |
| 1865 | |
| 1866 | int acpi_video_register(void) |
| 1867 | { |
| 1868 | int result = 0; |
| 1869 | if (register_count) { |
| 1870 | /* |
| 1871 | * if the function of acpi_video_register is already called, |
| 1872 | * don't register the acpi_vide_bus again and return no error. |
| 1873 | */ |
| 1874 | return 0; |
| 1875 | } |
| 1876 | |
| 1877 | result = acpi_bus_register_driver(&acpi_video_bus); |
| 1878 | if (result < 0) |
| 1879 | return -ENODEV; |
| 1880 | |
| 1881 | /* |
| 1882 | * When the acpi_video_bus is loaded successfully, increase |
| 1883 | * the counter reference. |
| 1884 | */ |
| 1885 | register_count = 1; |
| 1886 | |
| 1887 | return 0; |
| 1888 | } |
| 1889 | EXPORT_SYMBOL(acpi_video_register); |
| 1890 | |
| 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 | |
| 1902 | register_count = 0; |
| 1903 | |
| 1904 | return; |
| 1905 | } |
| 1906 | EXPORT_SYMBOL(acpi_video_unregister); |
| 1907 | |
| 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 | { |
| 1917 | dmi_check_system(video_dmi_table); |
| 1918 | |
| 1919 | if (intel_opregion_present()) |
| 1920 | return 0; |
| 1921 | |
| 1922 | return acpi_video_register(); |
| 1923 | } |
| 1924 | |
| 1925 | static void __exit acpi_video_exit(void) |
| 1926 | { |
| 1927 | acpi_video_unregister(); |
| 1928 | |
| 1929 | return; |
| 1930 | } |
| 1931 | |
| 1932 | module_init(acpi_video_init); |
| 1933 | module_exit(acpi_video_exit); |