radeon_acpi.c revision 1.5
1/* $NetBSD: radeon_acpi.c,v 1.5 2024/04/16 14:34:02 riastradh Exp $ */ 2 3/* 4 * Copyright 2012 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: radeon_acpi.c,v 1.5 2024/04/16 14:34:02 riastradh Exp $"); 28 29#include <linux/acpi.h> 30#include <linux/pci.h> 31#include <linux/pm_runtime.h> 32#include <linux/power_supply.h> 33#include <linux/slab.h> 34 35#include <acpi/acpi_bus.h> 36#include <acpi/video.h> 37 38#include <drm/drm_crtc_helper.h> 39#include <drm/drm_probe_helper.h> 40 41#include "atom.h" 42#include "radeon.h" 43#include "radeon_acpi.h" 44 45#ifdef __NetBSD__ 46#include <dev/acpi/acpi_pci.h> 47#include <dev/acpi/acpireg.h> 48#define _COMPONENT ACPI_DISPLAY_COMPONENT 49ACPI_MODULE_NAME("radeon_acpi") 50#include <linux/nbsd-namespace-acpi.h> 51#endif 52 53#if defined(CONFIG_VGA_SWITCHEROO) 54bool radeon_atpx_dgpu_req_power_for_displays(void); 55#else 56static inline bool radeon_atpx_dgpu_req_power_for_displays(void) { return false; } 57#endif 58 59#define ACPI_AC_CLASS "ac_adapter" 60 61extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev); 62 63struct atif_verify_interface { 64 u16 size; /* structure size in bytes (includes size field) */ 65 u16 version; /* version */ 66 u32 notification_mask; /* supported notifications mask */ 67 u32 function_bits; /* supported functions bit vector */ 68} __packed; 69 70struct atif_system_params { 71 u16 size; /* structure size in bytes (includes size field) */ 72 u32 valid_mask; /* valid flags mask */ 73 u32 flags; /* flags */ 74 u8 command_code; /* notify command code */ 75} __packed; 76 77struct atif_sbios_requests { 78 u16 size; /* structure size in bytes (includes size field) */ 79 u32 pending; /* pending sbios requests */ 80 u8 panel_exp_mode; /* panel expansion mode */ 81 u8 thermal_gfx; /* thermal state: target gfx controller */ 82 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ 83 u8 forced_power_gfx; /* forced power state: target gfx controller */ 84 u8 forced_power_state; /* forced power state: state id */ 85 u8 system_power_src; /* system power source */ 86 u8 backlight_level; /* panel backlight level (0-255) */ 87} __packed; 88 89#define ATIF_NOTIFY_MASK 0x3 90#define ATIF_NOTIFY_NONE 0 91#define ATIF_NOTIFY_81 1 92#define ATIF_NOTIFY_N 2 93 94struct atcs_verify_interface { 95 u16 size; /* structure size in bytes (includes size field) */ 96 u16 version; /* version */ 97 u32 function_bits; /* supported functions bit vector */ 98} __packed; 99 100#define ATCS_VALID_FLAGS_MASK 0x3 101 102struct atcs_pref_req_input { 103 u16 size; /* structure size in bytes (includes size field) */ 104 u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 105 u16 valid_flags_mask; /* valid flags mask */ 106 u16 flags; /* flags */ 107 u8 req_type; /* request type */ 108 u8 perf_req; /* performance request */ 109} __packed; 110 111struct atcs_pref_req_output { 112 u16 size; /* structure size in bytes (includes size field) */ 113 u8 ret_val; /* return value */ 114} __packed; 115 116/* Call the ATIF method 117 */ 118/** 119 * radeon_atif_call - call an ATIF method 120 * 121 * @handle: acpi handle 122 * @function: the ATIF function to execute 123 * @params: ATIF function params 124 * 125 * Executes the requested ATIF function (all asics). 126 * Returns a pointer to the acpi output buffer. 127 */ 128static union acpi_object *radeon_atif_call(acpi_handle handle, int function, 129 struct acpi_buffer *params) 130{ 131 acpi_status status; 132 union acpi_object atif_arg_elements[2]; 133 struct acpi_object_list atif_arg; 134 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 135 136 atif_arg.count = 2; 137 atif_arg.pointer = &atif_arg_elements[0]; 138 139 atif_arg_elements[0].type = ACPI_TYPE_INTEGER; 140 atif_arg_elements[0].integer.value = function; 141 142 if (params) { 143 atif_arg_elements[1].type = ACPI_TYPE_BUFFER; 144 atif_arg_elements[1].buffer.length = params->length; 145 atif_arg_elements[1].buffer.pointer = params->pointer; 146 } else { 147 /* We need a second fake parameter */ 148 atif_arg_elements[1].type = ACPI_TYPE_INTEGER; 149 atif_arg_elements[1].integer.value = 0; 150 } 151 152 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); 153 154 /* Fail only if calling the method fails and ATIF is supported */ 155 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 156 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 157 acpi_format_exception(status)); 158 ACPI_FREE(buffer.pointer); 159 return NULL; 160 } 161 162 return buffer.pointer; 163} 164 165/** 166 * radeon_atif_parse_notification - parse supported notifications 167 * 168 * @n: supported notifications struct 169 * @mask: supported notifications mask from ATIF 170 * 171 * Use the supported notifications mask from ATIF function 172 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications 173 * are supported (all asics). 174 */ 175static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask) 176{ 177 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; 178 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; 179 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; 180 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; 181 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; 182 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; 183 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; 184 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; 185 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; 186} 187 188/** 189 * radeon_atif_parse_functions - parse supported functions 190 * 191 * @f: supported functions struct 192 * @mask: supported functions mask from ATIF 193 * 194 * Use the supported functions mask from ATIF function 195 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions 196 * are supported (all asics). 197 */ 198static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask) 199{ 200 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; 201 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; 202 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; 203 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; 204 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; 205 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; 206 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; 207 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; 208 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; 209 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; 210} 211 212/** 213 * radeon_atif_verify_interface - verify ATIF 214 * 215 * @handle: acpi handle 216 * @atif: radeon atif struct 217 * 218 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function 219 * to initialize ATIF and determine what features are supported 220 * (all asics). 221 * returns 0 on success, error on failure. 222 */ 223static int radeon_atif_verify_interface(acpi_handle handle, 224 struct radeon_atif *atif) 225{ 226 union acpi_object *info; 227 struct atif_verify_interface output; 228 size_t size; 229 int err = 0; 230 231 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); 232 if (!info) 233 return -EIO; 234 235 memset(&output, 0, sizeof(output)); 236 237 size = *(u16 *) info->buffer.pointer; 238 if (size < 12) { 239 DRM_INFO("ATIF buffer is too small: %zu\n", size); 240 err = -EINVAL; 241 goto out; 242 } 243 size = min(sizeof(output), size); 244 245 memcpy(&output, info->buffer.pointer, size); 246 247 /* TODO: check version? */ 248 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); 249 250 radeon_atif_parse_notification(&atif->notifications, output.notification_mask); 251 radeon_atif_parse_functions(&atif->functions, output.function_bits); 252 253out: 254 ACPI_FREE(info); 255 return err; 256} 257 258/** 259 * radeon_atif_get_notification_params - determine notify configuration 260 * 261 * @handle: acpi handle 262 * @n: atif notification configuration struct 263 * 264 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function 265 * to determine if a notifier is used and if so which one 266 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) 267 * where n is specified in the result if a notifier is used. 268 * Returns 0 on success, error on failure. 269 */ 270static int radeon_atif_get_notification_params(acpi_handle handle, 271 struct radeon_atif_notification_cfg *n) 272{ 273 union acpi_object *info; 274 struct atif_system_params params; 275 size_t size; 276 int err = 0; 277 278 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); 279 if (!info) { 280 err = -EIO; 281 goto out; 282 } 283 284 size = *(u16 *) info->buffer.pointer; 285 if (size < 10) { 286 err = -EINVAL; 287 goto out; 288 } 289 290 memset(¶ms, 0, sizeof(params)); 291 size = min(sizeof(params), size); 292 memcpy(¶ms, info->buffer.pointer, size); 293 294 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", 295 params.flags, params.valid_mask); 296 params.flags = params.flags & params.valid_mask; 297 298 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { 299 n->enabled = false; 300 n->command_code = 0; 301 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { 302 n->enabled = true; 303 n->command_code = 0x81; 304 } else { 305 if (size < 11) { 306 err = -EINVAL; 307 goto out; 308 } 309 n->enabled = true; 310 n->command_code = params.command_code; 311 } 312 313out: 314 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", 315 (n->enabled ? "enabled" : "disabled"), 316 n->command_code); 317 ACPI_FREE(info); 318 return err; 319} 320 321#ifndef __NetBSD__ /* XXX radeon acpi */ 322 323/** 324 * radeon_atif_get_sbios_requests - get requested sbios event 325 * 326 * @handle: acpi handle 327 * @req: atif sbios request struct 328 * 329 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function 330 * to determine what requests the sbios is making to the driver 331 * (all asics). 332 * Returns 0 on success, error on failure. 333 */ 334static int radeon_atif_get_sbios_requests(acpi_handle handle, 335 struct atif_sbios_requests *req) 336{ 337 union acpi_object *info; 338 size_t size; 339 int count = 0; 340 341 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); 342 if (!info) 343 return -EIO; 344 345 size = *(u16 *)info->buffer.pointer; 346 if (size < 0xd) { 347 count = -EINVAL; 348 goto out; 349 } 350 memset(req, 0, sizeof(*req)); 351 352 size = min(sizeof(*req), size); 353 memcpy(req, info->buffer.pointer, size); 354 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); 355 356 count = hweight32(req->pending); 357 358out: 359 ACPI_FREE(info); 360 return count; 361} 362 363/** 364 * radeon_atif_handler - handle ATIF notify requests 365 * 366 * @rdev: radeon_device pointer 367 * @event: atif sbios request struct 368 * 369 * Checks the acpi event and if it matches an atif event, 370 * handles it. 371 * Returns NOTIFY code 372 */ 373static int radeon_atif_handler(struct radeon_device *rdev, 374 struct acpi_bus_event *event) 375{ 376 struct radeon_atif *atif = &rdev->atif; 377 struct atif_sbios_requests req; 378 acpi_handle handle; 379 int count; 380 381 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", 382 event->device_class, event->type); 383 384 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 385 return NOTIFY_DONE; 386 387 if (!atif->notification_cfg.enabled || 388 event->type != atif->notification_cfg.command_code) 389 /* Not our event */ 390 return NOTIFY_DONE; 391 392 /* Check pending SBIOS requests */ 393 handle = ACPI_HANDLE(&rdev->pdev->dev); 394 count = radeon_atif_get_sbios_requests(handle, &req); 395 396 if (count <= 0) 397 return NOTIFY_DONE; 398 399 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); 400 401 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { 402 struct radeon_encoder *enc = atif->encoder_for_bl; 403 404 if (enc) { 405 DRM_DEBUG_DRIVER("Changing brightness to %d\n", 406 req.backlight_level); 407 408 radeon_set_backlight_level(rdev, enc, req.backlight_level); 409 410#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) 411 if (rdev->is_atom_bios) { 412 struct radeon_encoder_atom_dig *dig = enc->enc_priv; 413 backlight_force_update(dig->bl_dev, 414 BACKLIGHT_UPDATE_HOTKEY); 415 } else { 416 struct radeon_encoder_lvds *dig = enc->enc_priv; 417 backlight_force_update(dig->bl_dev, 418 BACKLIGHT_UPDATE_HOTKEY); 419 } 420#endif 421 } 422 } 423 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { 424 if ((rdev->flags & RADEON_IS_PX) && 425 radeon_atpx_dgpu_req_power_for_displays()) { 426 pm_runtime_get_sync(rdev->ddev->dev); 427 /* Just fire off a uevent and let userspace tell us what to do */ 428 drm_helper_hpd_irq_event(rdev->ddev); 429 pm_runtime_mark_last_busy(rdev->ddev->dev); 430 pm_runtime_put_autosuspend(rdev->ddev->dev); 431 } 432 } 433 /* TODO: check other events */ 434 435 /* We've handled the event, stop the notifier chain. The ACPI interface 436 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to 437 * userspace if the event was generated only to signal a SBIOS 438 * request. 439 */ 440 return NOTIFY_BAD; 441} 442 443#endif /* __NetBSD__ */ 444 445/* Call the ATCS method 446 */ 447/** 448 * radeon_atcs_call - call an ATCS method 449 * 450 * @handle: acpi handle 451 * @function: the ATCS function to execute 452 * @params: ATCS function params 453 * 454 * Executes the requested ATCS function (all asics). 455 * Returns a pointer to the acpi output buffer. 456 */ 457static union acpi_object *radeon_atcs_call(acpi_handle handle, int function, 458 struct acpi_buffer *params) 459{ 460 acpi_status status; 461 union acpi_object atcs_arg_elements[2]; 462 struct acpi_object_list atcs_arg; 463 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 464 465 atcs_arg.count = 2; 466 atcs_arg.pointer = &atcs_arg_elements[0]; 467 468 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; 469 atcs_arg_elements[0].integer.value = function; 470 471 if (params) { 472 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; 473 atcs_arg_elements[1].buffer.length = params->length; 474 atcs_arg_elements[1].buffer.pointer = params->pointer; 475 } else { 476 /* We need a second fake parameter */ 477 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; 478 atcs_arg_elements[1].integer.value = 0; 479 } 480 481 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); 482 483 /* Fail only if calling the method fails and ATIF is supported */ 484 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 485 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", 486 acpi_format_exception(status)); 487 ACPI_FREE(buffer.pointer); 488 return NULL; 489 } 490 491 return buffer.pointer; 492} 493 494/** 495 * radeon_atcs_parse_functions - parse supported functions 496 * 497 * @f: supported functions struct 498 * @mask: supported functions mask from ATCS 499 * 500 * Use the supported functions mask from ATCS function 501 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions 502 * are supported (all asics). 503 */ 504static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask) 505{ 506 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; 507 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; 508 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; 509 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; 510} 511 512/** 513 * radeon_atcs_verify_interface - verify ATCS 514 * 515 * @handle: acpi handle 516 * @atcs: radeon atcs struct 517 * 518 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function 519 * to initialize ATCS and determine what features are supported 520 * (all asics). 521 * returns 0 on success, error on failure. 522 */ 523static int radeon_atcs_verify_interface(acpi_handle handle, 524 struct radeon_atcs *atcs) 525{ 526 union acpi_object *info; 527 struct atcs_verify_interface output; 528 size_t size; 529 int err = 0; 530 531 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); 532 if (!info) 533 return -EIO; 534 535 memset(&output, 0, sizeof(output)); 536 537 size = *(u16 *) info->buffer.pointer; 538 if (size < 8) { 539 DRM_INFO("ATCS buffer is too small: %zu\n", size); 540 err = -EINVAL; 541 goto out; 542 } 543 size = min(sizeof(output), size); 544 545 memcpy(&output, info->buffer.pointer, size); 546 547 /* TODO: check version? */ 548 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); 549 550 radeon_atcs_parse_functions(&atcs->functions, output.function_bits); 551 552out: 553 ACPI_FREE(info); 554 return err; 555} 556 557/** 558 * radeon_acpi_is_pcie_performance_request_supported 559 * 560 * @rdev: radeon_device pointer 561 * 562 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods 563 * are supported (all asics). 564 * returns true if supported, false if not. 565 */ 566bool radeon_acpi_is_pcie_performance_request_supported(struct radeon_device *rdev) 567{ 568 struct radeon_atcs *atcs = &rdev->atcs; 569 570 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) 571 return true; 572 573 return false; 574} 575 576/** 577 * radeon_acpi_pcie_notify_device_ready 578 * 579 * @rdev: radeon_device pointer 580 * 581 * Executes the PCIE_DEVICE_READY_NOTIFICATION method 582 * (all asics). 583 * returns 0 on success, error on failure. 584 */ 585int radeon_acpi_pcie_notify_device_ready(struct radeon_device *rdev) 586{ 587 acpi_handle handle; 588 union acpi_object *info; 589 struct radeon_atcs *atcs = &rdev->atcs; 590 591 /* Get the device handle */ 592#ifdef __NetBSD__ 593 const struct pci_attach_args *pa = &rdev->pdev->pd_pa; 594 struct acpi_devnode *const d = 595 acpi_pcidev_find(pci_get_segment(pa->pa_pc), 596 pa->pa_bus, pa->pa_device, pa->pa_function); 597 if (d == NULL) 598 return -EINVAL; 599 handle = d->ad_handle; 600#else 601 handle = ACPI_HANDLE(&rdev->pdev->dev); 602#endif 603 if (!handle) 604 return -EINVAL; 605 606 if (!atcs->functions.pcie_dev_rdy) 607 return -EINVAL; 608 609 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); 610 if (!info) 611 return -EIO; 612 613 ACPI_FREE(info); 614 615 return 0; 616} 617 618/** 619 * radeon_acpi_pcie_performance_request 620 * 621 * @rdev: radeon_device pointer 622 * @perf_req: requested perf level (pcie gen speed) 623 * @advertise: set advertise caps flag if set 624 * 625 * Executes the PCIE_PERFORMANCE_REQUEST method to 626 * change the pcie gen speed (all asics). 627 * returns 0 on success, error on failure. 628 */ 629int radeon_acpi_pcie_performance_request(struct radeon_device *rdev, 630 u8 perf_req, bool advertise) 631{ 632 acpi_handle handle; 633 union acpi_object *info; 634 struct radeon_atcs *atcs = &rdev->atcs; 635 struct atcs_pref_req_input atcs_input; 636 struct atcs_pref_req_output atcs_output; 637 struct acpi_buffer params; 638 size_t size; 639 u32 retry = 3; 640 641 /* Get the device handle */ 642#ifdef __NetBSD__ 643 const struct pci_attach_args *pa = &rdev->pdev->pd_pa; 644 struct acpi_devnode *const d = 645 acpi_pcidev_find(pci_get_segment(pa->pa_pc), 646 pa->pa_bus, pa->pa_device, pa->pa_function); 647 if (d == NULL) 648 return -EINVAL; 649 handle = d->ad_handle; 650#else 651 handle = ACPI_HANDLE(&rdev->pdev->dev); 652#endif 653 if (!handle) 654 return -EINVAL; 655 656 if (!atcs->functions.pcie_perf_req) 657 return -EINVAL; 658 659 atcs_input.size = sizeof(struct atcs_pref_req_input); 660 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 661 atcs_input.client_id = rdev->pdev->devfn | (rdev->pdev->bus->number << 8); 662 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; 663 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; 664 if (advertise) 665 atcs_input.flags |= ATCS_ADVERTISE_CAPS; 666 atcs_input.req_type = ATCS_PCIE_LINK_SPEED; 667 atcs_input.perf_req = perf_req; 668 669 params.length = sizeof(struct atcs_pref_req_input); 670 params.pointer = &atcs_input; 671 672 while (retry--) { 673 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); 674 if (!info) 675 return -EIO; 676 677 memset(&atcs_output, 0, sizeof(atcs_output)); 678 679 size = *(u16 *) info->buffer.pointer; 680 if (size < 3) { 681 DRM_INFO("ATCS buffer is too small: %zu\n", size); 682 ACPI_FREE(info); 683 return -EINVAL; 684 } 685 size = min(sizeof(atcs_output), size); 686 687 memcpy(&atcs_output, info->buffer.pointer, size); 688 689 ACPI_FREE(info); 690 691 switch (atcs_output.ret_val) { 692 case ATCS_REQUEST_REFUSED: 693 default: 694 return -EINVAL; 695 case ATCS_REQUEST_COMPLETE: 696 return 0; 697 case ATCS_REQUEST_IN_PROGRESS: 698 udelay(10); 699 break; 700 } 701 } 702 703 return 0; 704} 705 706/** 707 * radeon_acpi_event - handle notify events 708 * 709 * @nb: notifier block 710 * @val: val 711 * @data: acpi event 712 * 713 * Calls relevant radeon functions in response to various 714 * acpi events. 715 * Returns NOTIFY code 716 */ 717#ifndef __NetBSD__ /* XXX radeon acpi */ 718static int radeon_acpi_event(struct notifier_block *nb, 719 unsigned long val, 720 void *data) 721{ 722 struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb); 723 struct acpi_bus_event *entry = (struct acpi_bus_event *)data; 724 725 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { 726 if (power_supply_is_system_supplied() > 0) 727 DRM_DEBUG_DRIVER("pm: AC\n"); 728 else 729 DRM_DEBUG_DRIVER("pm: DC\n"); 730 731 radeon_pm_acpi_event_handler(rdev); 732 } 733 734 /* Check for pending SBIOS requests */ 735 return radeon_atif_handler(rdev, entry); 736} 737#endif 738 739/* Call all ACPI methods here */ 740/** 741 * radeon_acpi_init - init driver acpi support 742 * 743 * @rdev: radeon_device pointer 744 * 745 * Verifies the AMD ACPI interfaces and registers with the acpi 746 * notifier chain (all asics). 747 * Returns 0 on success, error on failure. 748 */ 749int radeon_acpi_init(struct radeon_device *rdev) 750{ 751 acpi_handle handle; 752 struct radeon_atif *atif = &rdev->atif; 753 struct radeon_atcs *atcs = &rdev->atcs; 754 int ret; 755 756 /* Get the device handle */ 757#ifdef __NetBSD__ 758 const struct pci_attach_args *pa = &rdev->pdev->pd_pa; 759 struct acpi_devnode *const d = 760 acpi_pcidev_find(pci_get_segment(pa->pa_pc), 761 pa->pa_bus, pa->pa_device, pa->pa_function); 762 if (d == NULL) 763 return -EINVAL; 764 handle = d->ad_handle; 765#else 766 handle = ACPI_HANDLE(&rdev->pdev->dev); 767#endif 768 769 /* No need to proceed if we're sure that ATIF is not supported */ 770 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) 771 return 0; 772 773 /* Call the ATCS method */ 774 ret = radeon_atcs_verify_interface(handle, atcs); 775 if (ret) { 776 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); 777 } 778 779 /* Call the ATIF method */ 780 ret = radeon_atif_verify_interface(handle, atif); 781 if (ret) { 782 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); 783 goto out; 784 } 785 786 if (atif->notifications.brightness_change) { 787 struct drm_encoder *tmp; 788 struct radeon_encoder *target = NULL; 789 790 /* Find the encoder controlling the brightness */ 791 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list, 792 head) { 793 struct radeon_encoder *enc = to_radeon_encoder(tmp); 794 795 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && 796 enc->enc_priv) { 797 if (rdev->is_atom_bios) { 798 struct radeon_encoder_atom_dig *dig = enc->enc_priv; 799 if (dig->bl_dev) { 800 target = enc; 801 break; 802 } 803 } else { 804 struct radeon_encoder_lvds *dig = enc->enc_priv; 805 if (dig->bl_dev) { 806 target = enc; 807 break; 808 } 809 } 810 } 811 } 812 813 atif->encoder_for_bl = target; 814 } 815 816 if (atif->functions.sbios_requests && !atif->functions.system_params) { 817 /* XXX check this workraround, if sbios request function is 818 * present we have to see how it's configured in the system 819 * params 820 */ 821 atif->functions.system_params = true; 822 } 823 824 if (atif->functions.system_params) { 825 ret = radeon_atif_get_notification_params(handle, 826 &atif->notification_cfg); 827 if (ret) { 828 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", 829 ret); 830 /* Disable notification */ 831 atif->notification_cfg.enabled = false; 832 } 833 } 834 835out: 836#ifndef __NetBSD__ /* XXX radeon acpi */ 837 rdev->acpi_nb.notifier_call = radeon_acpi_event; 838 register_acpi_notifier(&rdev->acpi_nb); 839#endif 840 841 return ret; 842} 843 844/** 845 * radeon_acpi_fini - tear down driver acpi support 846 * 847 * @rdev: radeon_device pointer 848 * 849 * Unregisters with the acpi notifier chain (all asics). 850 */ 851void radeon_acpi_fini(struct radeon_device *rdev) 852{ 853#ifndef __NetBSD__ /* XXX radeon acpi */ 854 unregister_acpi_notifier(&rdev->acpi_nb); 855#endif 856} 857