1/* $NetBSD: radeon_acpi.c,v 1.6 2024/04/18 23:33:15 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 1.6 2024/04/18 23:33:15 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#ifndef __NetBSD__ /* XXX radeon acpi */ 54#if defined(CONFIG_VGA_SWITCHEROO) 55bool radeon_atpx_dgpu_req_power_for_displays(void); 56#else 57static inline bool radeon_atpx_dgpu_req_power_for_displays(void) { return false; } 58#endif 59#endif 60 61#define ACPI_AC_CLASS "ac_adapter" 62 63extern void radeon_pm_acpi_event_handler(struct radeon_device *rdev); 64 65struct atif_verify_interface { 66 u16 size; /* structure size in bytes (includes size field) */ 67 u16 version; /* version */ 68 u32 notification_mask; /* supported notifications mask */ 69 u32 function_bits; /* supported functions bit vector */ 70} __packed; 71 72struct atif_system_params { 73 u16 size; /* structure size in bytes (includes size field) */ 74 u32 valid_mask; /* valid flags mask */ 75 u32 flags; /* flags */ 76 u8 command_code; /* notify command code */ 77} __packed; 78 79struct atif_sbios_requests { 80 u16 size; /* structure size in bytes (includes size field) */ 81 u32 pending; /* pending sbios requests */ 82 u8 panel_exp_mode; /* panel expansion mode */ 83 u8 thermal_gfx; /* thermal state: target gfx controller */ 84 u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ 85 u8 forced_power_gfx; /* forced power state: target gfx controller */ 86 u8 forced_power_state; /* forced power state: state id */ 87 u8 system_power_src; /* system power source */ 88 u8 backlight_level; /* panel backlight level (0-255) */ 89} __packed; 90 91#define ATIF_NOTIFY_MASK 0x3 92#define ATIF_NOTIFY_NONE 0 93#define ATIF_NOTIFY_81 1 94#define ATIF_NOTIFY_N 2 95 96struct atcs_verify_interface { 97 u16 size; /* structure size in bytes (includes size field) */ 98 u16 version; /* version */ 99 u32 function_bits; /* supported functions bit vector */ 100} __packed; 101 102#define ATCS_VALID_FLAGS_MASK 0x3 103 104struct atcs_pref_req_input { 105 u16 size; /* structure size in bytes (includes size field) */ 106 u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 107 u16 valid_flags_mask; /* valid flags mask */ 108 u16 flags; /* flags */ 109 u8 req_type; /* request type */ 110 u8 perf_req; /* performance request */ 111} __packed; 112 113struct atcs_pref_req_output { 114 u16 size; /* structure size in bytes (includes size field) */ 115 u8 ret_val; /* return value */ 116} __packed; 117 118/* Call the ATIF method 119 */ 120/** 121 * radeon_atif_call - call an ATIF method 122 * 123 * @handle: acpi handle 124 * @function: the ATIF function to execute 125 * @params: ATIF function params 126 * 127 * Executes the requested ATIF function (all asics). 128 * Returns a pointer to the acpi output buffer. 129 */ 130static union acpi_object *radeon_atif_call(acpi_handle handle, int function, 131 struct acpi_buffer *params) 132{ 133 acpi_status status; 134 union acpi_object atif_arg_elements[2]; 135 struct acpi_object_list atif_arg; 136 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 137 138 atif_arg.count = 2; 139 atif_arg.pointer = &atif_arg_elements[0]; 140 141 atif_arg_elements[0].type = ACPI_TYPE_INTEGER; 142 atif_arg_elements[0].integer.value = function; 143 144 if (params) { 145 atif_arg_elements[1].type = ACPI_TYPE_BUFFER; 146 atif_arg_elements[1].buffer.length = params->length; 147 atif_arg_elements[1].buffer.pointer = params->pointer; 148 } else { 149 /* We need a second fake parameter */ 150 atif_arg_elements[1].type = ACPI_TYPE_INTEGER; 151 atif_arg_elements[1].integer.value = 0; 152 } 153 154 status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); 155 156 /* Fail only if calling the method fails and ATIF is supported */ 157 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 158 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 159 acpi_format_exception(status)); 160 ACPI_FREE(buffer.pointer); 161 return NULL; 162 } 163 164 return buffer.pointer; 165} 166 167/** 168 * radeon_atif_parse_notification - parse supported notifications 169 * 170 * @n: supported notifications struct 171 * @mask: supported notifications mask from ATIF 172 * 173 * Use the supported notifications mask from ATIF function 174 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications 175 * are supported (all asics). 176 */ 177static void radeon_atif_parse_notification(struct radeon_atif_notifications *n, u32 mask) 178{ 179 n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; 180 n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; 181 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; 182 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; 183 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; 184 n->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; 185 n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; 186 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; 187 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; 188} 189 190/** 191 * radeon_atif_parse_functions - parse supported functions 192 * 193 * @f: supported functions struct 194 * @mask: supported functions mask from ATIF 195 * 196 * Use the supported functions mask from ATIF function 197 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions 198 * are supported (all asics). 199 */ 200static void radeon_atif_parse_functions(struct radeon_atif_functions *f, u32 mask) 201{ 202 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; 203 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; 204 f->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; 205 f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; 206 f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; 207 f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; 208 f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; 209 f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; 210 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; 211 f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; 212} 213 214/** 215 * radeon_atif_verify_interface - verify ATIF 216 * 217 * @handle: acpi handle 218 * @atif: radeon atif struct 219 * 220 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function 221 * to initialize ATIF and determine what features are supported 222 * (all asics). 223 * returns 0 on success, error on failure. 224 */ 225static int radeon_atif_verify_interface(acpi_handle handle, 226 struct radeon_atif *atif) 227{ 228 union acpi_object *info; 229 struct atif_verify_interface output; 230 size_t size; 231 int err = 0; 232 233 info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); 234 if (!info) 235 return -EIO; 236 237 memset(&output, 0, sizeof(output)); 238 239 size = *(u16 *) info->buffer.pointer; 240 if (size < 12) { 241 DRM_INFO("ATIF buffer is too small: %zu\n", size); 242 err = -EINVAL; 243 goto out; 244 } 245 size = min(sizeof(output), size); 246 247 memcpy(&output, info->buffer.pointer, size); 248 249 /* TODO: check version? */ 250 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); 251 252 radeon_atif_parse_notification(&atif->notifications, output.notification_mask); 253 radeon_atif_parse_functions(&atif->functions, output.function_bits); 254 255out: 256 ACPI_FREE(info); 257 return err; 258} 259 260/** 261 * radeon_atif_get_notification_params - determine notify configuration 262 * 263 * @handle: acpi handle 264 * @n: atif notification configuration struct 265 * 266 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function 267 * to determine if a notifier is used and if so which one 268 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) 269 * where n is specified in the result if a notifier is used. 270 * Returns 0 on success, error on failure. 271 */ 272static int radeon_atif_get_notification_params(acpi_handle handle, 273 struct radeon_atif_notification_cfg *n) 274{ 275 union acpi_object *info; 276 struct atif_system_params params; 277 size_t size; 278 int err = 0; 279 280 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); 281 if (!info) { 282 err = -EIO; 283 goto out; 284 } 285 286 size = *(u16 *) info->buffer.pointer; 287 if (size < 10) { 288 err = -EINVAL; 289 goto out; 290 } 291 292 memset(¶ms, 0, sizeof(params)); 293 size = min(sizeof(params), size); 294 memcpy(¶ms, info->buffer.pointer, size); 295 296 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", 297 params.flags, params.valid_mask); 298 params.flags = params.flags & params.valid_mask; 299 300 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { 301 n->enabled = false; 302 n->command_code = 0; 303 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { 304 n->enabled = true; 305 n->command_code = 0x81; 306 } else { 307 if (size < 11) { 308 err = -EINVAL; 309 goto out; 310 } 311 n->enabled = true; 312 n->command_code = params.command_code; 313 } 314 315out: 316 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", 317 (n->enabled ? "enabled" : "disabled"), 318 n->command_code); 319 ACPI_FREE(info); 320 return err; 321} 322 323#ifndef __NetBSD__ /* XXX radeon acpi */ 324 325/** 326 * radeon_atif_get_sbios_requests - get requested sbios event 327 * 328 * @handle: acpi handle 329 * @req: atif sbios request struct 330 * 331 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function 332 * to determine what requests the sbios is making to the driver 333 * (all asics). 334 * Returns 0 on success, error on failure. 335 */ 336static int radeon_atif_get_sbios_requests(acpi_handle handle, 337 struct atif_sbios_requests *req) 338{ 339 union acpi_object *info; 340 size_t size; 341 int count = 0; 342 343 info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); 344 if (!info) 345 return -EIO; 346 347 size = *(u16 *)info->buffer.pointer; 348 if (size < 0xd) { 349 count = -EINVAL; 350 goto out; 351 } 352 memset(req, 0, sizeof(*req)); 353 354 size = min(sizeof(*req), size); 355 memcpy(req, info->buffer.pointer, size); 356 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); 357 358 count = hweight32(req->pending); 359 360out: 361 ACPI_FREE(info); 362 return count; 363} 364 365/** 366 * radeon_atif_handler - handle ATIF notify requests 367 * 368 * @rdev: radeon_device pointer 369 * @event: atif sbios request struct 370 * 371 * Checks the acpi event and if it matches an atif event, 372 * handles it. 373 * Returns NOTIFY code 374 */ 375static int radeon_atif_handler(struct radeon_device *rdev, 376 struct acpi_bus_event *event) 377{ 378 struct radeon_atif *atif = &rdev->atif; 379 struct atif_sbios_requests req; 380 acpi_handle handle; 381 int count; 382 383 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", 384 event->device_class, event->type); 385 386 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 387 return NOTIFY_DONE; 388 389 if (!atif->notification_cfg.enabled || 390 event->type != atif->notification_cfg.command_code) 391 /* Not our event */ 392 return NOTIFY_DONE; 393 394 /* Check pending SBIOS requests */ 395 handle = ACPI_HANDLE(&rdev->pdev->dev); 396 count = radeon_atif_get_sbios_requests(handle, &req); 397 398 if (count <= 0) 399 return NOTIFY_DONE; 400 401 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); 402 403 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { 404 struct radeon_encoder *enc = atif->encoder_for_bl; 405 406 if (enc) { 407 DRM_DEBUG_DRIVER("Changing brightness to %d\n", 408 req.backlight_level); 409 410 radeon_set_backlight_level(rdev, enc, req.backlight_level); 411 412#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) 413 if (rdev->is_atom_bios) { 414 struct radeon_encoder_atom_dig *dig = enc->enc_priv; 415 backlight_force_update(dig->bl_dev, 416 BACKLIGHT_UPDATE_HOTKEY); 417 } else { 418 struct radeon_encoder_lvds *dig = enc->enc_priv; 419 backlight_force_update(dig->bl_dev, 420 BACKLIGHT_UPDATE_HOTKEY); 421 } 422#endif 423 } 424 } 425 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { 426 if ((rdev->flags & RADEON_IS_PX) && 427 radeon_atpx_dgpu_req_power_for_displays()) { 428 pm_runtime_get_sync(rdev->ddev->dev); 429 /* Just fire off a uevent and let userspace tell us what to do */ 430 drm_helper_hpd_irq_event(rdev->ddev); 431 pm_runtime_mark_last_busy(rdev->ddev->dev); 432 pm_runtime_put_autosuspend(rdev->ddev->dev); 433 } 434 } 435 /* TODO: check other events */ 436 437 /* We've handled the event, stop the notifier chain. The ACPI interface 438 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to 439 * userspace if the event was generated only to signal a SBIOS 440 * request. 441 */ 442 return NOTIFY_BAD; 443} 444 445#endif /* __NetBSD__ */ 446 447/* Call the ATCS method 448 */ 449/** 450 * radeon_atcs_call - call an ATCS method 451 * 452 * @handle: acpi handle 453 * @function: the ATCS function to execute 454 * @params: ATCS function params 455 * 456 * Executes the requested ATCS function (all asics). 457 * Returns a pointer to the acpi output buffer. 458 */ 459static union acpi_object *radeon_atcs_call(acpi_handle handle, int function, 460 struct acpi_buffer *params) 461{ 462 acpi_status status; 463 union acpi_object atcs_arg_elements[2]; 464 struct acpi_object_list atcs_arg; 465 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 466 467 atcs_arg.count = 2; 468 atcs_arg.pointer = &atcs_arg_elements[0]; 469 470 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; 471 atcs_arg_elements[0].integer.value = function; 472 473 if (params) { 474 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; 475 atcs_arg_elements[1].buffer.length = params->length; 476 atcs_arg_elements[1].buffer.pointer = params->pointer; 477 } else { 478 /* We need a second fake parameter */ 479 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; 480 atcs_arg_elements[1].integer.value = 0; 481 } 482 483 status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); 484 485 /* Fail only if calling the method fails and ATIF is supported */ 486 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 487 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", 488 acpi_format_exception(status)); 489 ACPI_FREE(buffer.pointer); 490 return NULL; 491 } 492 493 return buffer.pointer; 494} 495 496/** 497 * radeon_atcs_parse_functions - parse supported functions 498 * 499 * @f: supported functions struct 500 * @mask: supported functions mask from ATCS 501 * 502 * Use the supported functions mask from ATCS function 503 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions 504 * are supported (all asics). 505 */ 506static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask) 507{ 508 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; 509 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; 510 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; 511 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; 512} 513 514/** 515 * radeon_atcs_verify_interface - verify ATCS 516 * 517 * @handle: acpi handle 518 * @atcs: radeon atcs struct 519 * 520 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function 521 * to initialize ATCS and determine what features are supported 522 * (all asics). 523 * returns 0 on success, error on failure. 524 */ 525static int radeon_atcs_verify_interface(acpi_handle handle, 526 struct radeon_atcs *atcs) 527{ 528 union acpi_object *info; 529 struct atcs_verify_interface output; 530 size_t size; 531 int err = 0; 532 533 info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); 534 if (!info) 535 return -EIO; 536 537 memset(&output, 0, sizeof(output)); 538 539 size = *(u16 *) info->buffer.pointer; 540 if (size < 8) { 541 DRM_INFO("ATCS buffer is too small: %zu\n", size); 542 err = -EINVAL; 543 goto out; 544 } 545 size = min(sizeof(output), size); 546 547 memcpy(&output, info->buffer.pointer, size); 548 549 /* TODO: check version? */ 550 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); 551 552 radeon_atcs_parse_functions(&atcs->functions, output.function_bits); 553 554out: 555 ACPI_FREE(info); 556 return err; 557} 558 559/** 560 * radeon_acpi_is_pcie_performance_request_supported 561 * 562 * @rdev: radeon_device pointer 563 * 564 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods 565 * are supported (all asics). 566 * returns true if supported, false if not. 567 */ 568bool radeon_acpi_is_pcie_performance_request_supported(struct radeon_device *rdev) 569{ 570 struct radeon_atcs *atcs = &rdev->atcs; 571 572 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) 573 return true; 574 575 return false; 576} 577 578/** 579 * radeon_acpi_pcie_notify_device_ready 580 * 581 * @rdev: radeon_device pointer 582 * 583 * Executes the PCIE_DEVICE_READY_NOTIFICATION method 584 * (all asics). 585 * returns 0 on success, error on failure. 586 */ 587int radeon_acpi_pcie_notify_device_ready(struct radeon_device *rdev) 588{ 589 acpi_handle handle; 590 union acpi_object *info; 591 struct radeon_atcs *atcs = &rdev->atcs; 592 593 /* Get the device handle */ 594#ifdef __NetBSD__ 595 const struct pci_attach_args *pa = &rdev->pdev->pd_pa; 596 struct acpi_devnode *const d = 597 acpi_pcidev_find(pci_get_segment(pa->pa_pc), 598 pa->pa_bus, pa->pa_device, pa->pa_function); 599 if (d == NULL) 600 return -EINVAL; 601 handle = d->ad_handle; 602#else 603 handle = ACPI_HANDLE(&rdev->pdev->dev); 604#endif 605 if (!handle) 606 return -EINVAL; 607 608 if (!atcs->functions.pcie_dev_rdy) 609 return -EINVAL; 610 611 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); 612 if (!info) 613 return -EIO; 614 615 ACPI_FREE(info); 616 617 return 0; 618} 619 620/** 621 * radeon_acpi_pcie_performance_request 622 * 623 * @rdev: radeon_device pointer 624 * @perf_req: requested perf level (pcie gen speed) 625 * @advertise: set advertise caps flag if set 626 * 627 * Executes the PCIE_PERFORMANCE_REQUEST method to 628 * change the pcie gen speed (all asics). 629 * returns 0 on success, error on failure. 630 */ 631int radeon_acpi_pcie_performance_request(struct radeon_device *rdev, 632 u8 perf_req, bool advertise) 633{ 634 acpi_handle handle; 635 union acpi_object *info; 636 struct radeon_atcs *atcs = &rdev->atcs; 637 struct atcs_pref_req_input atcs_input; 638 struct atcs_pref_req_output atcs_output; 639 struct acpi_buffer params; 640 size_t size; 641 u32 retry = 3; 642 643 /* Get the device handle */ 644#ifdef __NetBSD__ 645 const struct pci_attach_args *pa = &rdev->pdev->pd_pa; 646 struct acpi_devnode *const d = 647 acpi_pcidev_find(pci_get_segment(pa->pa_pc), 648 pa->pa_bus, pa->pa_device, pa->pa_function); 649 if (d == NULL) 650 return -EINVAL; 651 handle = d->ad_handle; 652#else 653 handle = ACPI_HANDLE(&rdev->pdev->dev); 654#endif 655 if (!handle) 656 return -EINVAL; 657 658 if (!atcs->functions.pcie_perf_req) 659 return -EINVAL; 660 661 atcs_input.size = sizeof(struct atcs_pref_req_input); 662 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 663 atcs_input.client_id = rdev->pdev->devfn | (rdev->pdev->bus->number << 8); 664 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; 665 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; 666 if (advertise) 667 atcs_input.flags |= ATCS_ADVERTISE_CAPS; 668 atcs_input.req_type = ATCS_PCIE_LINK_SPEED; 669 atcs_input.perf_req = perf_req; 670 671 params.length = sizeof(struct atcs_pref_req_input); 672 params.pointer = &atcs_input; 673 674 while (retry--) { 675 info = radeon_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); 676 if (!info) 677 return -EIO; 678 679 memset(&atcs_output, 0, sizeof(atcs_output)); 680 681 size = *(u16 *) info->buffer.pointer; 682 if (size < 3) { 683 DRM_INFO("ATCS buffer is too small: %zu\n", size); 684 ACPI_FREE(info); 685 return -EINVAL; 686 } 687 size = min(sizeof(atcs_output), size); 688 689 memcpy(&atcs_output, info->buffer.pointer, size); 690 691 ACPI_FREE(info); 692 693 switch (atcs_output.ret_val) { 694 case ATCS_REQUEST_REFUSED: 695 default: 696 return -EINVAL; 697 case ATCS_REQUEST_COMPLETE: 698 return 0; 699 case ATCS_REQUEST_IN_PROGRESS: 700 udelay(10); 701 break; 702 } 703 } 704 705 return 0; 706} 707 708/** 709 * radeon_acpi_event - handle notify events 710 * 711 * @nb: notifier block 712 * @val: val 713 * @data: acpi event 714 * 715 * Calls relevant radeon functions in response to various 716 * acpi events. 717 * Returns NOTIFY code 718 */ 719#ifndef __NetBSD__ /* XXX radeon acpi */ 720static int radeon_acpi_event(struct notifier_block *nb, 721 unsigned long val, 722 void *data) 723{ 724 struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb); 725 struct acpi_bus_event *entry = (struct acpi_bus_event *)data; 726 727 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { 728 if (power_supply_is_system_supplied() > 0) 729 DRM_DEBUG_DRIVER("pm: AC\n"); 730 else 731 DRM_DEBUG_DRIVER("pm: DC\n"); 732 733 radeon_pm_acpi_event_handler(rdev); 734 } 735 736 /* Check for pending SBIOS requests */ 737 return radeon_atif_handler(rdev, entry); 738} 739#endif 740 741/* Call all ACPI methods here */ 742/** 743 * radeon_acpi_init - init driver acpi support 744 * 745 * @rdev: radeon_device pointer 746 * 747 * Verifies the AMD ACPI interfaces and registers with the acpi 748 * notifier chain (all asics). 749 * Returns 0 on success, error on failure. 750 */ 751int radeon_acpi_init(struct radeon_device *rdev) 752{ 753 acpi_handle handle; 754 struct radeon_atif *atif = &rdev->atif; 755 struct radeon_atcs *atcs = &rdev->atcs; 756 int ret; 757 758 /* Get the device handle */ 759#ifdef __NetBSD__ 760 const struct pci_attach_args *pa = &rdev->pdev->pd_pa; 761 struct acpi_devnode *const d = 762 acpi_pcidev_find(pci_get_segment(pa->pa_pc), 763 pa->pa_bus, pa->pa_device, pa->pa_function); 764 if (d == NULL) 765 return -EINVAL; 766 handle = d->ad_handle; 767#else 768 handle = ACPI_HANDLE(&rdev->pdev->dev); 769#endif 770 771 /* No need to proceed if we're sure that ATIF is not supported */ 772 if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle) 773 return 0; 774 775 /* Call the ATCS method */ 776 ret = radeon_atcs_verify_interface(handle, atcs); 777 if (ret) { 778 DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); 779 } 780 781 /* Call the ATIF method */ 782 ret = radeon_atif_verify_interface(handle, atif); 783 if (ret) { 784 DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); 785 goto out; 786 } 787 788 if (atif->notifications.brightness_change) { 789 struct drm_encoder *tmp; 790 struct radeon_encoder *target = NULL; 791 792 /* Find the encoder controlling the brightness */ 793 list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list, 794 head) { 795 struct radeon_encoder *enc = to_radeon_encoder(tmp); 796 797 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && 798 enc->enc_priv) { 799 if (rdev->is_atom_bios) { 800 struct radeon_encoder_atom_dig *dig = enc->enc_priv; 801 if (dig->bl_dev) { 802 target = enc; 803 break; 804 } 805 } else { 806 struct radeon_encoder_lvds *dig = enc->enc_priv; 807 if (dig->bl_dev) { 808 target = enc; 809 break; 810 } 811 } 812 } 813 } 814 815 atif->encoder_for_bl = target; 816 } 817 818 if (atif->functions.sbios_requests && !atif->functions.system_params) { 819 /* XXX check this workraround, if sbios request function is 820 * present we have to see how it's configured in the system 821 * params 822 */ 823 atif->functions.system_params = true; 824 } 825 826 if (atif->functions.system_params) { 827 ret = radeon_atif_get_notification_params(handle, 828 &atif->notification_cfg); 829 if (ret) { 830 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", 831 ret); 832 /* Disable notification */ 833 atif->notification_cfg.enabled = false; 834 } 835 } 836 837out: 838#ifndef __NetBSD__ /* XXX radeon acpi */ 839 rdev->acpi_nb.notifier_call = radeon_acpi_event; 840 register_acpi_notifier(&rdev->acpi_nb); 841#endif 842 843 return ret; 844} 845 846/** 847 * radeon_acpi_fini - tear down driver acpi support 848 * 849 * @rdev: radeon_device pointer 850 * 851 * Unregisters with the acpi notifier chain (all asics). 852 */ 853void radeon_acpi_fini(struct radeon_device *rdev) 854{ 855#ifndef __NetBSD__ /* XXX radeon acpi */ 856 unregister_acpi_notifier(&rdev->acpi_nb); 857#endif 858} 859