1 /* 2 * Copyright 2012 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * $FreeBSD: head/sys/dev/drm2/radeon/radeon_acpi.c 254885 2013-08-25 19:37:15Z dumbbell $ 23 */ 24 25 #include <drm/drmP.h> 26 #include <drm/drm_crtc_helper.h> 27 #include "radeon.h" 28 #include "radeon_acpi.h" 29 #include "atom.h" 30 31 #define ACPI_AC_CLASS "ac_adapter" 32 33 struct atif_verify_interface { 34 u16 size; /* structure size in bytes (includes size field) */ 35 u16 version; /* version */ 36 u32 notification_mask; /* supported notifications mask */ 37 u32 function_bits; /* supported functions bit vector */ 38 } __packed; 39 40 struct atif_system_params { 41 u16 size; /* structure size in bytes (includes size field) */ 42 u32 valid_mask; /* valid flags mask */ 43 u32 flags; /* flags */ 44 u8 command_code; /* notify command code */ 45 } __packed; 46 47 struct atif_sbios_requests { 48 u16 size; /* structure size in bytes (includes size field) */ 49 u32 pending; /* pending sbios requests */ 50 u8 panel_exp_mode; /* panel expansion mode */ 51 u8 thermal_gfx; /* thermal state: target gfx controller */ 52 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ 53 u8 forced_power_gfx; /* forced power state: target gfx controller */ 54 u8 forced_power_state; /* forced power state: state id */ 55 u8 system_power_src; /* system power source */ 56 u8 backlight_level; /* panel backlight level (0-255) */ 57 } __packed; 58 59 #define ATIF_NOTIFY_MASK 0x3 60 #define ATIF_NOTIFY_NONE 0 61 #define ATIF_NOTIFY_81 1 62 #define ATIF_NOTIFY_N 2 63 64 struct atcs_verify_interface { 65 u16 size; /* structure size in bytes (includes size field) */ 66 u16 version; /* version */ 67 u32 function_bits; /* supported functions bit vector */ 68 } __packed; 69 70 /* Call the ATIF method 71 */ 72 /** 73 * radeon_atif_call - call an ATIF method 74 * 75 * @handle: acpi handle 76 * @function: the ATIF function to execute 77 * @params: ATIF function params 78 * 79 * Executes the requested ATIF function (all asics). 80 * Returns a pointer to the acpi output buffer. 81 */ 82 static ACPI_OBJECT *radeon_atif_call(ACPI_HANDLE handle, int function, 83 ACPI_BUFFER *params) 84 { 85 ACPI_STATUS status; 86 ACPI_OBJECT atif_arg_elements[2]; 87 ACPI_OBJECT_LIST atif_arg; 88 ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 89 90 atif_arg.Count = 2; 91 atif_arg.Pointer = &atif_arg_elements[0]; 92 93 atif_arg_elements[0].Type = ACPI_TYPE_INTEGER; 94 atif_arg_elements[0].Integer.Value = function; 95 96 if (params) { 97 atif_arg_elements[1].Type = ACPI_TYPE_BUFFER; 98 atif_arg_elements[1].Buffer.Length = params->Length; 99 atif_arg_elements[1].Buffer.Pointer = params->Pointer; 100 } else { 101 /* We need a second fake parameter */ 102 atif_arg_elements[1].Type = ACPI_TYPE_INTEGER; 103 atif_arg_elements[1].Integer.Value = 0; 104 } 105 106 status = AcpiEvaluateObject(handle, "ATIF", &atif_arg, &buffer); 107 108 /* Fail only if calling the method fails and ATIF is supported */ 109 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 110 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 111 AcpiFormatException(status)); 112 AcpiOsFree(buffer.Pointer); 113 return NULL; 114 } 115 116 return buffer.Pointer; 117 } 118 119 /** 120 * radeon_atif_parse_notification - parse supported notifications 121 * 122 * @n: supported notifications struct 123 * @mask: supported notifications mask from ATIF 124 * 125 * Use the supported notifications mask from ATIF function 126 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications 127 * are supported (all asics). 128 */ 129 static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask) 130 { 131 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; 132 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; 133 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; 134 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; 135 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; 136 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; 137 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; 138 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; 139 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; 140 } 141 142 /** 143 * radeon_atif_parse_functions - parse supported functions 144 * 145 * @f: supported functions struct 146 * @mask: supported functions mask from ATIF 147 * 148 * Use the supported functions mask from ATIF function 149 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions 150 * are supported (all asics). 151 */ 152 static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask) 153 { 154 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; 155 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; 156 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; 157 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; 158 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; 159 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; 160 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; 161 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; 162 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; 163 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; 164 } 165 166 /** 167 * radeon_atif_verify_interface - verify ATIF 168 * 169 * @handle: acpi handle 170 * @atif: radeon atif struct 171 * 172 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function 173 * to initialize ATIF and determine what features are supported 174 * (all asics). 175 * returns 0 on success, error on failure. 176 */ 177 static int radeon_atif_verify_interface(ACPI_HANDLE handle, 178 struct radeon_atif *atif) 179 { 180 ACPI_OBJECT *info; 181 struct atif_verify_interface output; 182 size_t size; 183 int err = 0; 184 185 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); 186 if (!info) 187 return -EIO; 188 189 memset(&output, 0, sizeof(output)); 190 191 size = *(u16 *) info->Buffer.Pointer; 192 if (size < 12) { 193 DRM_INFO("ATIF buffer is too small: %zu\n", size); 194 err = -EINVAL; 195 goto out; 196 } 197 size = min(sizeof(output), size); 198 199 memcpy(&output, info->Buffer.Pointer, size); 200 201 /* TODO: check version? */ 202 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); 203 204 radeon_atif_parse_notification(&atif->notifications, output.notification_mask); 205 radeon_atif_parse_functions(&atif->functions, output.function_bits); 206 207 out: 208 AcpiOsFree(info); 209 return err; 210 } 211 212 /** 213 * radeon_atif_get_notification_params - determine notify configuration 214 * 215 * @handle: acpi handle 216 * @n: atif notification configuration struct 217 * 218 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function 219 * to determine if a notifier is used and if so which one 220 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) 221 * where n is specified in the result if a notifier is used. 222 * Returns 0 on success, error on failure. 223 */ 224 static int radeon_atif_get_notification_params(ACPI_HANDLE handle, 225 struct radeon_atif_notification_cfg *n) 226 { 227 ACPI_OBJECT *info; 228 struct atif_system_params params; 229 size_t size; 230 int err = 0; 231 232 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); 233 if (!info) { 234 err = -EIO; 235 goto out; 236 } 237 238 size = *(u16 *) info->Buffer.Pointer; 239 if (size < 10) { 240 err = -EINVAL; 241 goto out; 242 } 243 244 memset(¶ms, 0, sizeof(params)); 245 size = min(sizeof(params), size); 246 memcpy(¶ms, info->Buffer.Pointer, size); 247 248 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", 249 params.flags, params.valid_mask); 250 params.flags = params.flags & params.valid_mask; 251 252 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { 253 n->enabled = false; 254 n->command_code = 0; 255 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { 256 n->enabled = true; 257 n->command_code = 0x81; 258 } else { 259 if (size < 11) { 260 err = -EINVAL; 261 goto out; 262 } 263 n->enabled = true; 264 n->command_code = params.command_code; 265 } 266 267 out: 268 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", 269 (n->enabled ? "enabled" : "disabled"), 270 n->command_code); 271 AcpiOsFree(info); 272 return err; 273 } 274 275 /** 276 * radeon_atif_get_sbios_requests - get requested sbios event 277 * 278 * @handle: acpi handle 279 * @req: atif sbios request struct 280 * 281 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function 282 * to determine what requests the sbios is making to the driver 283 * (all asics). 284 * Returns 0 on success, error on failure. 285 */ 286 static int radeon_atif_get_sbios_requests(ACPI_HANDLE handle, 287 struct atif_sbios_requests *req) 288 { 289 ACPI_OBJECT *info; 290 size_t size; 291 int count = 0; 292 293 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); 294 if (!info) 295 return -EIO; 296 297 size = *(u16 *)info->Buffer.Pointer; 298 if (size < 0xd) { 299 count = -EINVAL; 300 goto out; 301 } 302 memset(req, 0, sizeof(*req)); 303 304 size = min(sizeof(*req), size); 305 memcpy(req, info->Buffer.Pointer, size); 306 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); 307 308 count = hweight32(req->pending); 309 310 out: 311 AcpiOsFree(info); 312 return count; 313 } 314 315 /** 316 * radeon_atif_handler - handle ATIF notify requests 317 * 318 * @rdev: radeon_device pointer 319 * @event: atif sbios request struct 320 * 321 * Checks the acpi event and if it matches an atif event, 322 * handles it. 323 * Returns NOTIFY code 324 */ 325 void radeon_atif_handler(struct radeon_device *rdev, 326 UINT32 type) 327 { 328 struct radeon_atif *atif = &rdev->atif; 329 struct atif_sbios_requests req; 330 ACPI_HANDLE handle; 331 int count; 332 333 DRM_DEBUG_DRIVER("event, type = %#x\n", 334 type); 335 336 if (!atif->notification_cfg.enabled || 337 type != atif->notification_cfg.command_code) 338 /* Not our event */ 339 return; 340 341 /* Check pending SBIOS requests */ 342 handle = rdev->acpi.handle; 343 count = radeon_atif_get_sbios_requests(handle, &req); 344 345 if (count <= 0) 346 return; 347 348 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); 349 350 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { 351 struct radeon_encoder *enc = atif->encoder_for_bl; 352 353 if (enc) { 354 DRM_DEBUG_DRIVER("Changing brightness to %d\n", 355 req.backlight_level); 356 357 radeon_set_backlight_level(rdev, enc, req.backlight_level); 358 359 #ifdef DUMBBELL_WIP 360 if (rdev->is_atom_bios) { 361 struct radeon_encoder_atom_dig *dig = enc->enc_priv; 362 backlight_force_update(dig->bl_dev, 363 BACKLIGHT_UPDATE_HOTKEY); 364 } else { 365 struct radeon_encoder_lvds *dig = enc->enc_priv; 366 backlight_force_update(dig->bl_dev, 367 BACKLIGHT_UPDATE_HOTKEY); 368 } 369 #endif /* DUMBBELL_WIP */ 370 } 371 } 372 /* TODO: check other events */ 373 374 /* We've handled the event, stop the notifier chain. The ACPI interface 375 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to 376 * userspace if the event was generated only to signal a SBIOS 377 * request. 378 */ 379 } 380 381 /* Call the ATCS method 382 */ 383 /** 384 * radeon_atcs_call - call an ATCS method 385 * 386 * @handle: acpi handle 387 * @function: the ATCS function to execute 388 * @params: ATCS function params 389 * 390 * Executes the requested ATCS function (all asics). 391 * Returns a pointer to the acpi output buffer. 392 */ 393 static union acpi_object *radeon_atcs_call(ACPI_HANDLE handle, int function, 394 ACPI_BUFFER *params) 395 { 396 ACPI_STATUS status; 397 ACPI_OBJECT atcs_arg_elements[2]; 398 ACPI_OBJECT_LIST atcs_arg; 399 ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 400 401 atcs_arg.Count = 2; 402 atcs_arg.Pointer = &atcs_arg_elements[0]; 403 404 atcs_arg_elements[0].Type = ACPI_TYPE_INTEGER; 405 atcs_arg_elements[0].Integer.Value = function; 406 407 if (params) { 408 atcs_arg_elements[1].Type = ACPI_TYPE_BUFFER; 409 atcs_arg_elements[1].Buffer.Length = params->Length; 410 atcs_arg_elements[1].Buffer.Pointer = params->Pointer; 411 } else { 412 /* We need a second fake parameter */ 413 atcs_arg_elements[1].Type = ACPI_TYPE_INTEGER; 414 atcs_arg_elements[1].Integer.Value = 0; 415 } 416 417 status = AcpiEvaluateObject(handle, "ATCS", &atcs_arg, &buffer); 418 419 /* Fail only if calling the method fails and ATIF is supported */ 420 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 421 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", 422 AcpiFormatException(status)); 423 AcpiOsFree(buffer.Pointer); 424 return NULL; 425 } 426 427 return buffer.Pointer; 428 } 429 430 /** 431 * radeon_atcs_parse_functions - parse supported functions 432 * 433 * @f: supported functions struct 434 * @mask: supported functions mask from ATCS 435 * 436 * Use the supported functions mask from ATCS function 437 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions 438 * are supported (all asics). 439 */ 440 static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask) 441 { 442 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; 443 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; 444 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; 445 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; 446 } 447 448 /** 449 * radeon_atcs_verify_interface - verify ATCS 450 * 451 * @handle: acpi handle 452 * @atcs: radeon atcs struct 453 * 454 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function 455 * to initialize ATCS and determine what features are supported 456 * (all asics). 457 * returns 0 on success, error on failure. 458 */ 459 static int radeon_atcs_verify_interface(ACPI_HANDLE handle, 460 struct radeon_atcs *atcs) 461 { 462 ACPI_OBJECT *info; 463 struct atcs_verify_interface output; 464 size_t size; 465 int err = 0; 466 467 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); 468 if (!info) 469 return -EIO; 470 471 memset(&output, 0, sizeof(output)); 472 473 size = *(u16 *) info->Buffer.Pointer; 474 if (size < 8) { 475 DRM_INFO("ATCS buffer is too small: %zu\n", size); 476 err = -EINVAL; 477 goto out; 478 } 479 size = min(sizeof(output), size); 480 481 memcpy(&output, info->Buffer.Pointer, size); 482 483 /* TODO: check version? */ 484 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); 485 486 radeon_atcs_parse_functions(&atcs->functions, output.function_bits); 487 488 out: 489 AcpiOsFree(info); 490 return err; 491 } 492 493 /** 494 * radeon_acpi_event - handle notify events 495 * 496 * @nb: notifier block 497 * @val: val 498 * @data: acpi event 499 * 500 * Calls relevant radeon functions in response to various 501 * acpi events. 502 * Returns NOTIFY code 503 */ 504 static void radeon_acpi_event(ACPI_HANDLE handle, UINT32 type, 505 void *context) 506 { 507 struct radeon_device *rdev = (struct radeon_device *)context; 508 509 #ifdef DUMBBELL_WIP 510 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { 511 if (power_supply_is_system_supplied() > 0) 512 DRM_DEBUG_DRIVER("pm: AC\n"); 513 else 514 DRM_DEBUG_DRIVER("pm: DC\n"); 515 516 radeon_pm_acpi_event_handler(rdev); 517 } 518 #endif /* DUMBBELL_WIP */ 519 520 /* Check for pending SBIOS requests */ 521 radeon_atif_handler(rdev, type); 522 } 523 524 /* Call all ACPI methods here */ 525 /** 526 * radeon_acpi_init - init driver acpi support 527 * 528 * @rdev: radeon_device pointer 529 * 530 * Verifies the AMD ACPI interfaces and registers with the acpi 531 * notifier chain (all asics). 532 * Returns 0 on success, error on failure. 533 */ 534 int radeon_acpi_init(struct radeon_device *rdev) 535 { 536 ACPI_HANDLE handle; 537 struct radeon_atif *atif = &rdev->atif; 538 struct radeon_atcs *atcs = &rdev->atcs; 539 int ret; 540 541 /* Get the device handle */ 542 handle = acpi_get_handle(rdev->dev); 543 544 /* No need to proceed if we're sure that ATIF is not supported */ 545 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) 546 return 0; 547 548 /* Call the ATCS method */ 549 ret = radeon_atcs_verify_interface(handle, atcs); 550 if (ret) { 551 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); 552 } 553 554 /* Call the ATIF method */ 555 ret = radeon_atif_verify_interface(handle, atif); 556 if (ret) { 557 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); 558 goto out; 559 } 560 561 if (atif->notifications.brightness_change) { 562 struct drm_encoder *tmp; 563 struct radeon_encoder *target = NULL; 564 565 /* Find the encoder controlling the brightness */ 566 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list, 567 head) { 568 struct radeon_encoder *enc = to_radeon_encoder(tmp); 569 570 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && 571 enc->enc_priv) { 572 if (rdev->is_atom_bios) { 573 struct radeon_encoder_atom_dig *dig = enc->enc_priv; 574 if (dig->bl_dev) { 575 target = enc; 576 break; 577 } 578 } else { 579 struct radeon_encoder_lvds *dig = enc->enc_priv; 580 if (dig->bl_dev) { 581 target = enc; 582 break; 583 } 584 } 585 } 586 } 587 588 atif->encoder_for_bl = target; 589 if (!target) { 590 /* Brightness change notification is enabled, but we 591 * didn't find a backlight controller, this should 592 * never happen. 593 */ 594 DRM_ERROR("Cannot find a backlight controller\n"); 595 } 596 } 597 598 if (atif->functions.sbios_requests && !atif->functions.system_params) { 599 /* XXX check this workraround, if sbios request function is 600 * present we have to see how it's configured in the system 601 * params 602 */ 603 atif->functions.system_params = true; 604 } 605 606 if (atif->functions.system_params) { 607 ret = radeon_atif_get_notification_params(handle, 608 &atif->notification_cfg); 609 if (ret) { 610 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", 611 ret); 612 /* Disable notification */ 613 atif->notification_cfg.enabled = false; 614 } 615 } 616 617 out: 618 rdev->acpi.handle = handle; 619 rdev->acpi.notifier_call = radeon_acpi_event; 620 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, 621 rdev->acpi.notifier_call, rdev); 622 623 return ret; 624 } 625 626 /** 627 * radeon_acpi_fini - tear down driver acpi support 628 * 629 * @rdev: radeon_device pointer 630 * 631 * Unregisters with the acpi notifier chain (all asics). 632 */ 633 void radeon_acpi_fini(struct radeon_device *rdev) 634 { 635 AcpiRemoveNotifyHandler(rdev->acpi.handle, ACPI_DEVICE_NOTIFY, 636 rdev->acpi.notifier_call); 637 } 638