1 /* 2 * Copyright 2008 Intel Corporation <hong.liu@intel.com> 3 * Copyright 2008 Red Hat <mjg@redhat.com> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial 15 * portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24 * SOFTWARE. 25 * 26 */ 27 28 #include <linux/acpi.h> 29 #include <linux/debugfs.h> 30 #include <linux/dmi.h> 31 #include <acpi/video.h> 32 33 #include <drm/drm_edid.h> 34 #include <drm/drm_file.h> 35 #include <drm/drm_print.h> 36 37 #include "i915_utils.h" 38 #include "intel_acpi.h" 39 #include "intel_backlight.h" 40 #include "intel_display_core.h" 41 #include "intel_display_types.h" 42 #include "intel_opregion.h" 43 #include "intel_pci_config.h" 44 45 #define OPREGION_HEADER_OFFSET 0 46 #define OPREGION_ACPI_OFFSET 0x100 47 #define ACPI_CLID 0x01ac /* current lid state indicator */ 48 #define ACPI_CDCK 0x01b0 /* current docking state indicator */ 49 #define OPREGION_SWSCI_OFFSET 0x200 50 #define OPREGION_ASLE_OFFSET 0x300 51 #define OPREGION_VBT_OFFSET 0x400 52 #define OPREGION_ASLE_EXT_OFFSET 0x1C00 53 54 #define OPREGION_SIGNATURE "IntelGraphicsMem" 55 #define MBOX_ACPI BIT(0) /* Mailbox #1 */ 56 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */ 57 #define MBOX_ASLE BIT(2) /* Mailbox #3 */ 58 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */ 59 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */ 60 61 #define PCON_HEADLESS_SKU BIT(13) 62 63 struct opregion_header { 64 u8 signature[16]; 65 u32 size; 66 struct { 67 u8 rsvd; 68 u8 revision; 69 u8 minor; 70 u8 major; 71 } __packed over; 72 u8 bios_ver[32]; 73 u8 vbios_ver[16]; 74 u8 driver_ver[16]; 75 u32 mboxes; 76 u32 driver_model; 77 u32 pcon; 78 u8 dver[32]; 79 u8 rsvd[124]; 80 } __packed; 81 82 /* OpRegion mailbox #1: public ACPI methods */ 83 struct opregion_acpi { 84 u32 drdy; /* driver readiness */ 85 u32 csts; /* notification status */ 86 u32 cevt; /* current event */ 87 u8 rsvd1[20]; 88 u32 didl[8]; /* supported display devices ID list */ 89 u32 cpdl[8]; /* currently presented display list */ 90 u32 cadl[8]; /* currently active display list */ 91 u32 nadl[8]; /* next active devices list */ 92 u32 aslp; /* ASL sleep time-out */ 93 u32 tidx; /* toggle table index */ 94 u32 chpd; /* current hotplug enable indicator */ 95 u32 clid; /* current lid state*/ 96 u32 cdck; /* current docking state */ 97 u32 sxsw; /* Sx state resume */ 98 u32 evts; /* ASL supported events */ 99 u32 cnot; /* current OS notification */ 100 u32 nrdy; /* driver status */ 101 u32 did2[7]; /* extended supported display devices ID list */ 102 u32 cpd2[7]; /* extended attached display devices list */ 103 u8 rsvd2[4]; 104 } __packed; 105 106 /* OpRegion mailbox #2: SWSCI */ 107 struct opregion_swsci { 108 u32 scic; /* SWSCI command|status|data */ 109 u32 parm; /* command parameters */ 110 u32 dslp; /* driver sleep time-out */ 111 u8 rsvd[244]; 112 } __packed; 113 114 /* OpRegion mailbox #3: ASLE */ 115 struct opregion_asle { 116 u32 ardy; /* driver readiness */ 117 u32 aslc; /* ASLE interrupt command */ 118 u32 tche; /* technology enabled indicator */ 119 u32 alsi; /* current ALS illuminance reading */ 120 u32 bclp; /* backlight brightness to set */ 121 u32 pfit; /* panel fitting state */ 122 u32 cblv; /* current brightness level */ 123 u16 bclm[20]; /* backlight level duty cycle mapping table */ 124 u32 cpfm; /* current panel fitting mode */ 125 u32 epfm; /* enabled panel fitting modes */ 126 u8 plut[74]; /* panel LUT and identifier */ 127 u32 pfmb; /* PWM freq and min brightness */ 128 u32 cddv; /* color correction default values */ 129 u32 pcft; /* power conservation features */ 130 u32 srot; /* supported rotation angles */ 131 u32 iuer; /* IUER events */ 132 u64 fdss; 133 u32 fdsp; 134 u32 stat; 135 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+) 136 * address of raw VBT data. */ 137 u32 rvds; /* Size of raw vbt data */ 138 u8 rsvd[58]; 139 } __packed; 140 141 /* OpRegion mailbox #5: ASLE ext */ 142 struct opregion_asle_ext { 143 u32 phed; /* Panel Header */ 144 u8 bddc[256]; /* Panel EDID */ 145 u8 rsvd[764]; 146 } __packed; 147 148 /* Driver readiness indicator */ 149 #define ASLE_ARDY_READY (1 << 0) 150 #define ASLE_ARDY_NOT_READY (0 << 0) 151 152 /* ASLE Interrupt Command (ASLC) bits */ 153 #define ASLC_SET_ALS_ILLUM (1 << 0) 154 #define ASLC_SET_BACKLIGHT (1 << 1) 155 #define ASLC_SET_PFIT (1 << 2) 156 #define ASLC_SET_PWM_FREQ (1 << 3) 157 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4) 158 #define ASLC_BUTTON_ARRAY (1 << 5) 159 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6) 160 #define ASLC_DOCKING_INDICATOR (1 << 7) 161 #define ASLC_ISCT_STATE_CHANGE (1 << 8) 162 #define ASLC_REQ_MSK 0x1ff 163 /* response bits */ 164 #define ASLC_ALS_ILLUM_FAILED (1 << 10) 165 #define ASLC_BACKLIGHT_FAILED (1 << 12) 166 #define ASLC_PFIT_FAILED (1 << 14) 167 #define ASLC_PWM_FREQ_FAILED (1 << 16) 168 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18) 169 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20) 170 #define ASLC_CONVERTIBLE_FAILED (1 << 22) 171 #define ASLC_DOCKING_FAILED (1 << 24) 172 #define ASLC_ISCT_STATE_FAILED (1 << 26) 173 174 /* Technology enabled indicator */ 175 #define ASLE_TCHE_ALS_EN (1 << 0) 176 #define ASLE_TCHE_BLC_EN (1 << 1) 177 #define ASLE_TCHE_PFIT_EN (1 << 2) 178 #define ASLE_TCHE_PFMB_EN (1 << 3) 179 180 /* ASLE backlight brightness to set */ 181 #define ASLE_BCLP_VALID (1<<31) 182 #define ASLE_BCLP_MSK (~(1<<31)) 183 184 /* ASLE panel fitting request */ 185 #define ASLE_PFIT_VALID (1<<31) 186 #define ASLE_PFIT_CENTER (1<<0) 187 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 188 #define ASLE_PFIT_STRETCH_GFX (1<<2) 189 190 /* PWM frequency and minimum brightness */ 191 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 192 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 193 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 194 #define ASLE_PFMB_PWM_VALID (1<<31) 195 196 #define ASLE_CBLV_VALID (1<<31) 197 198 /* IUER */ 199 #define ASLE_IUER_DOCKING (1 << 7) 200 #define ASLE_IUER_CONVERTIBLE (1 << 6) 201 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4) 202 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3) 203 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2) 204 #define ASLE_IUER_WINDOWS_BTN (1 << 1) 205 #define ASLE_IUER_POWER_BTN (1 << 0) 206 207 #define ASLE_PHED_EDID_VALID_MASK 0x3 208 209 /* Software System Control Interrupt (SWSCI) */ 210 #define SWSCI_SCIC_INDICATOR (1 << 0) 211 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 212 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1) 213 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8 214 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8) 215 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8 216 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8) 217 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5 218 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5) 219 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1 220 221 #define SWSCI_FUNCTION_CODE(main, sub) \ 222 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \ 223 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT) 224 225 /* SWSCI: Get BIOS Data (GBDA) */ 226 #define SWSCI_GBDA 4 227 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0) 228 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1) 229 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4) 230 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5) 231 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6) 232 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7) 233 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10) 234 235 /* SWSCI: System BIOS Callbacks (SBCB) */ 236 #define SWSCI_SBCB 6 237 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0) 238 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1) 239 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3) 240 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4) 241 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5) 242 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6) 243 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7) 244 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8) 245 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9) 246 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10) 247 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11) 248 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16) 249 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17) 250 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18) 251 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19) 252 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21) 253 254 #define MAX_DSLP 1500 255 256 #define OPREGION_SIZE (8 * 1024) 257 258 struct intel_opregion { 259 struct intel_display *display; 260 261 struct opregion_header *header; 262 struct opregion_acpi *acpi; 263 struct opregion_swsci *swsci; 264 u32 swsci_gbda_sub_functions; 265 u32 swsci_sbcb_sub_functions; 266 struct opregion_asle *asle; 267 struct opregion_asle_ext *asle_ext; 268 void *rvda; 269 const void *vbt; 270 u32 vbt_size; 271 struct work_struct asle_work; 272 struct notifier_block acpi_notifier; 273 }; 274 275 static int check_swsci_function(struct intel_display *display, u32 function) 276 { 277 struct intel_opregion *opregion = display->opregion; 278 struct opregion_swsci *swsci; 279 u32 main_function, sub_function; 280 281 if (!opregion) 282 return -ENODEV; 283 284 swsci = opregion->swsci; 285 if (!swsci) 286 return -ENODEV; 287 288 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> 289 SWSCI_SCIC_MAIN_FUNCTION_SHIFT; 290 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> 291 SWSCI_SCIC_SUB_FUNCTION_SHIFT; 292 293 /* Check if we can call the function. See swsci_setup for details. */ 294 if (main_function == SWSCI_SBCB) { 295 if ((opregion->swsci_sbcb_sub_functions & 296 (1 << sub_function)) == 0) 297 return -EINVAL; 298 } else if (main_function == SWSCI_GBDA) { 299 if ((opregion->swsci_gbda_sub_functions & 300 (1 << sub_function)) == 0) 301 return -EINVAL; 302 } 303 304 return 0; 305 } 306 307 static int swsci(struct intel_display *display, 308 u32 function, u32 parm, u32 *parm_out) 309 { 310 struct opregion_swsci *swsci; 311 struct pci_dev *pdev = to_pci_dev(display->drm->dev); 312 u32 scic, dslp; 313 u16 swsci_val; 314 int ret; 315 316 ret = check_swsci_function(display, function); 317 if (ret) 318 return ret; 319 320 swsci = display->opregion->swsci; 321 322 /* Driver sleep timeout in ms. */ 323 dslp = swsci->dslp; 324 if (!dslp) { 325 /* The spec says 2ms should be the default, but it's too small 326 * for some machines. */ 327 dslp = 50; 328 } else if (dslp > MAX_DSLP) { 329 /* Hey bios, trust must be earned. */ 330 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, " 331 "using %u ms instead\n", dslp, MAX_DSLP); 332 dslp = MAX_DSLP; 333 } 334 335 /* The spec tells us to do this, but we are the only user... */ 336 scic = swsci->scic; 337 if (scic & SWSCI_SCIC_INDICATOR) { 338 drm_dbg(display->drm, "SWSCI request already in progress\n"); 339 return -EBUSY; 340 } 341 342 scic = function | SWSCI_SCIC_INDICATOR; 343 344 swsci->parm = parm; 345 swsci->scic = scic; 346 347 /* Ensure SCI event is selected and event trigger is cleared. */ 348 pci_read_config_word(pdev, SWSCI, &swsci_val); 349 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) { 350 swsci_val |= SWSCI_SCISEL; 351 swsci_val &= ~SWSCI_GSSCIE; 352 pci_write_config_word(pdev, SWSCI, swsci_val); 353 } 354 355 /* Use event trigger to tell bios to check the mail. */ 356 swsci_val |= SWSCI_GSSCIE; 357 pci_write_config_word(pdev, SWSCI, swsci_val); 358 359 /* Poll for the result. */ 360 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0) 361 if (wait_for(C, dslp)) { 362 drm_dbg(display->drm, "SWSCI request timed out\n"); 363 return -ETIMEDOUT; 364 } 365 366 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >> 367 SWSCI_SCIC_EXIT_STATUS_SHIFT; 368 369 /* Note: scic == 0 is an error! */ 370 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) { 371 drm_dbg(display->drm, "SWSCI request error %u\n", scic); 372 return -EIO; 373 } 374 375 if (parm_out) 376 *parm_out = swsci->parm; 377 378 return 0; 379 380 #undef C 381 } 382 383 #define DISPLAY_TYPE_CRT 0 384 #define DISPLAY_TYPE_TV 1 385 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2 386 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3 387 388 int intel_opregion_notify_encoder(struct intel_encoder *encoder, 389 bool enable) 390 { 391 struct intel_display *display = to_intel_display(encoder); 392 u32 parm = 0; 393 u32 type = 0; 394 u32 port; 395 int ret; 396 397 /* don't care about old stuff for now */ 398 if (!HAS_DDI(display)) 399 return 0; 400 401 /* Avoid port out of bounds checks if SWSCI isn't there. */ 402 ret = check_swsci_function(display, SWSCI_SBCB_DISPLAY_POWER_STATE); 403 if (ret) 404 return ret; 405 406 if (encoder->type == INTEL_OUTPUT_DSI) 407 port = 0; 408 else 409 port = encoder->port; 410 411 if (port == PORT_E) { 412 port = 0; 413 } else { 414 parm |= 1 << port; 415 port++; 416 } 417 418 /* 419 * The port numbering and mapping here is bizarre. The now-obsolete 420 * swsci spec supports ports numbered [0..4]. Port E is handled as a 421 * special case, but port F and beyond are not. The functionality is 422 * supposed to be obsolete for new platforms. Just bail out if the port 423 * number is out of bounds after mapping. 424 */ 425 if (port > 4) { 426 drm_dbg_kms(display->drm, 427 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n", 428 encoder->base.base.id, encoder->base.name, 429 port_name(encoder->port), port); 430 return -EINVAL; 431 } 432 433 if (!enable) 434 parm |= 4 << 8; 435 436 switch (encoder->type) { 437 case INTEL_OUTPUT_ANALOG: 438 type = DISPLAY_TYPE_CRT; 439 break; 440 case INTEL_OUTPUT_DDI: 441 case INTEL_OUTPUT_DP: 442 case INTEL_OUTPUT_HDMI: 443 case INTEL_OUTPUT_DP_MST: 444 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; 445 break; 446 case INTEL_OUTPUT_EDP: 447 case INTEL_OUTPUT_DSI: 448 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; 449 break; 450 default: 451 drm_WARN_ONCE(display->drm, 1, 452 "unsupported intel_encoder type %d\n", 453 encoder->type); 454 return -EINVAL; 455 } 456 457 parm |= type << (16 + port * 3); 458 459 return swsci(display, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); 460 } 461 462 static const struct { 463 pci_power_t pci_power_state; 464 u32 parm; 465 } power_state_map[] = { 466 { PCI_D0, 0x00 }, 467 { PCI_D1, 0x01 }, 468 { PCI_D2, 0x02 }, 469 { PCI_D3hot, 0x04 }, 470 { PCI_D3cold, 0x04 }, 471 }; 472 473 int intel_opregion_notify_adapter(struct intel_display *display, 474 pci_power_t state) 475 { 476 int i; 477 478 if (!HAS_DDI(display)) 479 return 0; 480 481 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { 482 if (state == power_state_map[i].pci_power_state) 483 return swsci(display, SWSCI_SBCB_ADAPTER_POWER_STATE, 484 power_state_map[i].parm, NULL); 485 } 486 487 return -EINVAL; 488 } 489 490 static u32 asle_set_backlight(struct intel_display *display, u32 bclp) 491 { 492 struct intel_connector *connector; 493 struct drm_connector_list_iter conn_iter; 494 struct opregion_asle *asle = display->opregion->asle; 495 496 drm_dbg(display->drm, "bclp = 0x%08x\n", bclp); 497 498 if (acpi_video_get_backlight_type() == acpi_backlight_native) { 499 drm_dbg_kms(display->drm, 500 "opregion backlight request ignored\n"); 501 return 0; 502 } 503 504 if (!(bclp & ASLE_BCLP_VALID)) 505 return ASLC_BACKLIGHT_FAILED; 506 507 bclp &= ASLE_BCLP_MSK; 508 if (bclp > 255) 509 return ASLC_BACKLIGHT_FAILED; 510 511 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL); 512 513 /* 514 * Update backlight on all connectors that support backlight (usually 515 * only one). 516 */ 517 drm_dbg_kms(display->drm, "updating opregion backlight %d/255\n", 518 bclp); 519 drm_connector_list_iter_begin(display->drm, &conn_iter); 520 for_each_intel_connector_iter(connector, &conn_iter) 521 intel_backlight_set_acpi(connector->base.state, bclp, 255); 522 drm_connector_list_iter_end(&conn_iter); 523 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID; 524 525 drm_modeset_unlock(&display->drm->mode_config.connection_mutex); 526 527 528 return 0; 529 } 530 531 static u32 asle_set_als_illum(struct intel_display *display, u32 alsi) 532 { 533 /* alsi is the current ALS reading in lux. 0 indicates below sensor 534 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 535 drm_dbg(display->drm, "Illum is not supported\n"); 536 return ASLC_ALS_ILLUM_FAILED; 537 } 538 539 static u32 asle_set_pwm_freq(struct intel_display *display, u32 pfmb) 540 { 541 drm_dbg(display->drm, "PWM freq is not supported\n"); 542 return ASLC_PWM_FREQ_FAILED; 543 } 544 545 static u32 asle_set_pfit(struct intel_display *display, u32 pfit) 546 { 547 /* Panel fitting is currently controlled by the X code, so this is a 548 noop until modesetting support works fully */ 549 drm_dbg(display->drm, "Pfit is not supported\n"); 550 return ASLC_PFIT_FAILED; 551 } 552 553 static u32 asle_set_supported_rotation_angles(struct intel_display *display, u32 srot) 554 { 555 drm_dbg(display->drm, "SROT is not supported\n"); 556 return ASLC_ROTATION_ANGLES_FAILED; 557 } 558 559 static u32 asle_set_button_array(struct intel_display *display, u32 iuer) 560 { 561 if (!iuer) 562 drm_dbg(display->drm, 563 "Button array event is not supported (nothing)\n"); 564 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 565 drm_dbg(display->drm, 566 "Button array event is not supported (rotation lock)\n"); 567 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 568 drm_dbg(display->drm, 569 "Button array event is not supported (volume down)\n"); 570 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 571 drm_dbg(display->drm, 572 "Button array event is not supported (volume up)\n"); 573 if (iuer & ASLE_IUER_WINDOWS_BTN) 574 drm_dbg(display->drm, 575 "Button array event is not supported (windows)\n"); 576 if (iuer & ASLE_IUER_POWER_BTN) 577 drm_dbg(display->drm, 578 "Button array event is not supported (power)\n"); 579 580 return ASLC_BUTTON_ARRAY_FAILED; 581 } 582 583 static u32 asle_set_convertible(struct intel_display *display, u32 iuer) 584 { 585 if (iuer & ASLE_IUER_CONVERTIBLE) 586 drm_dbg(display->drm, 587 "Convertible is not supported (clamshell)\n"); 588 else 589 drm_dbg(display->drm, 590 "Convertible is not supported (slate)\n"); 591 592 return ASLC_CONVERTIBLE_FAILED; 593 } 594 595 static u32 asle_set_docking(struct intel_display *display, u32 iuer) 596 { 597 if (iuer & ASLE_IUER_DOCKING) 598 drm_dbg(display->drm, "Docking is not supported (docked)\n"); 599 else 600 drm_dbg(display->drm, 601 "Docking is not supported (undocked)\n"); 602 603 return ASLC_DOCKING_FAILED; 604 } 605 606 static u32 asle_isct_state(struct intel_display *display) 607 { 608 drm_dbg(display->drm, "ISCT is not supported\n"); 609 return ASLC_ISCT_STATE_FAILED; 610 } 611 612 static void asle_work(struct work_struct *work) 613 { 614 struct intel_opregion *opregion = 615 container_of(work, struct intel_opregion, asle_work); 616 struct intel_display *display = opregion->display; 617 struct opregion_asle *asle = opregion->asle; 618 u32 aslc_stat = 0; 619 u32 aslc_req; 620 621 if (!asle) 622 return; 623 624 aslc_req = asle->aslc; 625 626 if (!(aslc_req & ASLC_REQ_MSK)) { 627 drm_dbg(display->drm, 628 "No request on ASLC interrupt 0x%08x\n", aslc_req); 629 return; 630 } 631 632 if (aslc_req & ASLC_SET_ALS_ILLUM) 633 aslc_stat |= asle_set_als_illum(display, asle->alsi); 634 635 if (aslc_req & ASLC_SET_BACKLIGHT) 636 aslc_stat |= asle_set_backlight(display, asle->bclp); 637 638 if (aslc_req & ASLC_SET_PFIT) 639 aslc_stat |= asle_set_pfit(display, asle->pfit); 640 641 if (aslc_req & ASLC_SET_PWM_FREQ) 642 aslc_stat |= asle_set_pwm_freq(display, asle->pfmb); 643 644 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 645 aslc_stat |= asle_set_supported_rotation_angles(display, 646 asle->srot); 647 648 if (aslc_req & ASLC_BUTTON_ARRAY) 649 aslc_stat |= asle_set_button_array(display, asle->iuer); 650 651 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 652 aslc_stat |= asle_set_convertible(display, asle->iuer); 653 654 if (aslc_req & ASLC_DOCKING_INDICATOR) 655 aslc_stat |= asle_set_docking(display, asle->iuer); 656 657 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 658 aslc_stat |= asle_isct_state(display); 659 660 asle->aslc = aslc_stat; 661 } 662 663 bool intel_opregion_asle_present(struct intel_display *display) 664 { 665 return display->opregion && display->opregion->asle; 666 } 667 668 void intel_opregion_asle_intr(struct intel_display *display) 669 { 670 struct intel_opregion *opregion = display->opregion; 671 672 if (opregion && opregion->asle) 673 queue_work(display->wq.unordered, &opregion->asle_work); 674 } 675 676 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 677 #define ACPI_EV_LID (1<<1) 678 #define ACPI_EV_DOCK (1<<2) 679 680 /* 681 * The only video events relevant to opregion are 0x80. These indicate either a 682 * docking event, lid switch or display switch request. In Linux, these are 683 * handled by the dock, button and video drivers. 684 */ 685 static int intel_opregion_video_event(struct notifier_block *nb, 686 unsigned long val, void *data) 687 { 688 struct intel_opregion *opregion = container_of(nb, struct intel_opregion, 689 acpi_notifier); 690 struct acpi_bus_event *event = data; 691 struct opregion_acpi *acpi; 692 int ret = NOTIFY_OK; 693 694 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 695 return NOTIFY_DONE; 696 697 acpi = opregion->acpi; 698 699 if (event->type == 0x80 && ((acpi->cevt & 1) == 0)) 700 ret = NOTIFY_BAD; 701 702 acpi->csts = 0; 703 704 return ret; 705 } 706 707 /* 708 * Initialise the DIDL field in opregion. This passes a list of devices to 709 * the firmware. Values are defined by section B.4.2 of the ACPI specification 710 * (version 3) 711 */ 712 713 static void set_did(struct intel_opregion *opregion, int i, u32 val) 714 { 715 if (i < ARRAY_SIZE(opregion->acpi->didl)) { 716 opregion->acpi->didl[i] = val; 717 } else { 718 i -= ARRAY_SIZE(opregion->acpi->didl); 719 720 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) 721 return; 722 723 opregion->acpi->did2[i] = val; 724 } 725 } 726 727 static void intel_didl_outputs(struct intel_display *display) 728 { 729 struct intel_opregion *opregion = display->opregion; 730 struct intel_connector *connector; 731 struct drm_connector_list_iter conn_iter; 732 int i = 0, max_outputs; 733 734 /* 735 * In theory, did2, the extended didl, gets added at opregion version 736 * 3.0. In practice, however, we're supposed to set it for earlier 737 * versions as well, since a BIOS that doesn't understand did2 should 738 * not look at it anyway. Use a variable so we can tweak this if a need 739 * arises later. 740 */ 741 max_outputs = ARRAY_SIZE(opregion->acpi->didl) + 742 ARRAY_SIZE(opregion->acpi->did2); 743 744 intel_acpi_device_id_update(display); 745 746 drm_connector_list_iter_begin(display->drm, &conn_iter); 747 for_each_intel_connector_iter(connector, &conn_iter) { 748 if (i < max_outputs) 749 set_did(opregion, i, connector->acpi_device_id); 750 i++; 751 } 752 drm_connector_list_iter_end(&conn_iter); 753 754 drm_dbg_kms(display->drm, "%d outputs detected\n", i); 755 756 if (i > max_outputs) 757 drm_err(display->drm, 758 "More than %d outputs in connector list\n", 759 max_outputs); 760 761 /* If fewer than max outputs, the list must be null terminated */ 762 if (i < max_outputs) 763 set_did(opregion, i, 0); 764 } 765 766 static void intel_setup_cadls(struct intel_display *display) 767 { 768 struct intel_opregion *opregion = display->opregion; 769 struct intel_connector *connector; 770 struct drm_connector_list_iter conn_iter; 771 int i = 0; 772 773 /* 774 * Initialize the CADL field from the connector device ids. This is 775 * essentially the same as copying from the DIDL. Technically, this is 776 * not always correct as display outputs may exist, but not active. This 777 * initialization is necessary for some Clevo laptops that check this 778 * field before processing the brightness and display switching hotkeys. 779 * 780 * Note that internal panels should be at the front of the connector 781 * list already, ensuring they're not left out. 782 */ 783 drm_connector_list_iter_begin(display->drm, &conn_iter); 784 for_each_intel_connector_iter(connector, &conn_iter) { 785 if (i >= ARRAY_SIZE(opregion->acpi->cadl)) 786 break; 787 opregion->acpi->cadl[i++] = connector->acpi_device_id; 788 } 789 drm_connector_list_iter_end(&conn_iter); 790 791 /* If fewer than 8 active devices, the list must be null terminated */ 792 if (i < ARRAY_SIZE(opregion->acpi->cadl)) 793 opregion->acpi->cadl[i] = 0; 794 } 795 796 static void swsci_setup(struct intel_display *display) 797 { 798 struct intel_opregion *opregion = display->opregion; 799 bool requested_callbacks = false; 800 u32 tmp; 801 802 /* Sub-function code 0 is okay, let's allow them. */ 803 opregion->swsci_gbda_sub_functions = 1; 804 opregion->swsci_sbcb_sub_functions = 1; 805 806 /* We use GBDA to ask for supported GBDA calls. */ 807 if (swsci(display, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 808 /* make the bits match the sub-function codes */ 809 tmp <<= 1; 810 opregion->swsci_gbda_sub_functions |= tmp; 811 } 812 813 /* 814 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 815 * must not call interfaces that are not specifically requested by the 816 * bios. 817 */ 818 if (swsci(display, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 819 /* here, the bits already match sub-function codes */ 820 opregion->swsci_sbcb_sub_functions |= tmp; 821 requested_callbacks = true; 822 } 823 824 /* 825 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 826 * the callback is _requested_. But we still can't call interfaces that 827 * are not requested. 828 */ 829 if (swsci(display, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 830 /* make the bits match the sub-function codes */ 831 u32 low = tmp & 0x7ff; 832 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 833 tmp = (high << 4) | (low << 1) | 1; 834 835 /* best guess what to do with supported wrt requested */ 836 if (requested_callbacks) { 837 u32 req = opregion->swsci_sbcb_sub_functions; 838 if ((req & tmp) != req) 839 drm_dbg(display->drm, 840 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", 841 req, tmp); 842 /* XXX: for now, trust the requested callbacks */ 843 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 844 } else { 845 opregion->swsci_sbcb_sub_functions |= tmp; 846 } 847 } 848 849 drm_dbg(display->drm, 850 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 851 opregion->swsci_gbda_sub_functions, 852 opregion->swsci_sbcb_sub_functions); 853 } 854 855 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 856 { 857 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 858 "VBIOS ROM for %s\n", id->ident); 859 return 1; 860 } 861 862 static const struct dmi_system_id intel_no_opregion_vbt[] = { 863 { 864 .callback = intel_no_opregion_vbt_callback, 865 .ident = "ThinkCentre A57", 866 .matches = { 867 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 868 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 869 }, 870 }, 871 { } 872 }; 873 874 int intel_opregion_setup(struct intel_display *display) 875 { 876 struct intel_opregion *opregion; 877 struct pci_dev *pdev = to_pci_dev(display->drm->dev); 878 u32 asls, mboxes; 879 char buf[sizeof(OPREGION_SIGNATURE)]; 880 int err = 0; 881 void *base; 882 const void *vbt; 883 u32 vbt_size; 884 885 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); 886 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); 887 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); 888 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 889 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400); 890 891 pci_read_config_dword(pdev, ASLS, &asls); 892 drm_dbg(display->drm, "graphic opregion physical addr: 0x%x\n", 893 asls); 894 if (asls == 0) { 895 drm_dbg(display->drm, "ACPI OpRegion not supported!\n"); 896 return -ENOTSUPP; 897 } 898 899 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL); 900 if (!opregion) 901 return -ENOMEM; 902 903 opregion->display = display; 904 display->opregion = opregion; 905 906 INIT_WORK(&opregion->asle_work, asle_work); 907 908 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB); 909 if (!base) { 910 err = -ENOMEM; 911 goto err_memremap; 912 } 913 914 memcpy(buf, base, sizeof(buf)); 915 916 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 917 drm_dbg(display->drm, "opregion signature mismatch\n"); 918 err = -EINVAL; 919 goto err_out; 920 } 921 opregion->header = base; 922 923 drm_dbg(display->drm, "ACPI OpRegion version %u.%u.%u\n", 924 opregion->header->over.major, 925 opregion->header->over.minor, 926 opregion->header->over.revision); 927 928 mboxes = opregion->header->mboxes; 929 if (mboxes & MBOX_ACPI) { 930 drm_dbg(display->drm, "Public ACPI methods supported\n"); 931 opregion->acpi = base + OPREGION_ACPI_OFFSET; 932 /* 933 * Indicate we handle monitor hotplug events ourselves so we do 934 * not need ACPI notifications for them. Disabling these avoids 935 * triggering the AML code doing the notifation, which may be 936 * broken as Windows also seems to disable these. 937 */ 938 opregion->acpi->chpd = 1; 939 } 940 941 if (mboxes & MBOX_SWSCI) { 942 u8 major = opregion->header->over.major; 943 944 if (major >= 3) { 945 drm_err(display->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n"); 946 } else { 947 if (major >= 2) 948 drm_dbg(display->drm, "SWSCI Mailbox #2 present for opregion v2.x\n"); 949 drm_dbg(display->drm, "SWSCI supported\n"); 950 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 951 swsci_setup(display); 952 } 953 } 954 955 if (mboxes & MBOX_ASLE) { 956 drm_dbg(display->drm, "ASLE supported\n"); 957 opregion->asle = base + OPREGION_ASLE_OFFSET; 958 959 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 960 } 961 962 if (mboxes & MBOX_ASLE_EXT) { 963 drm_dbg(display->drm, "ASLE extension supported\n"); 964 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET; 965 } 966 967 if (mboxes & MBOX_BACKLIGHT) { 968 drm_dbg(display->drm, "Mailbox #2 for backlight present\n"); 969 } 970 971 if (dmi_check_system(intel_no_opregion_vbt)) 972 goto out; 973 974 if (opregion->header->over.major >= 2 && opregion->asle && 975 opregion->asle->rvda && opregion->asle->rvds) { 976 resource_size_t rvda = opregion->asle->rvda; 977 978 /* 979 * opregion 2.0: rvda is the physical VBT address. 980 * 981 * opregion 2.1+: rvda is unsigned, relative offset from 982 * opregion base, and should never point within opregion. 983 */ 984 if (opregion->header->over.major > 2 || 985 opregion->header->over.minor >= 1) { 986 drm_WARN_ON(display->drm, rvda < OPREGION_SIZE); 987 988 rvda += asls; 989 } 990 991 opregion->rvda = memremap(rvda, opregion->asle->rvds, 992 MEMREMAP_WB); 993 994 vbt = opregion->rvda; 995 vbt_size = opregion->asle->rvds; 996 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) { 997 drm_dbg_kms(display->drm, 998 "Found valid VBT in ACPI OpRegion (RVDA)\n"); 999 opregion->vbt = vbt; 1000 opregion->vbt_size = vbt_size; 1001 goto out; 1002 } else { 1003 drm_dbg_kms(display->drm, 1004 "Invalid VBT in ACPI OpRegion (RVDA)\n"); 1005 memunmap(opregion->rvda); 1006 opregion->rvda = NULL; 1007 } 1008 } 1009 1010 vbt = base + OPREGION_VBT_OFFSET; 1011 /* 1012 * The VBT specification says that if the ASLE ext mailbox is not used 1013 * its area is reserved, but on some CHT boards the VBT extends into the 1014 * ASLE ext area. Allow this even though it is against the spec, so we 1015 * do not end up rejecting the VBT on those boards (and end up not 1016 * finding the LCD panel because of this). 1017 */ 1018 vbt_size = (mboxes & MBOX_ASLE_EXT) ? 1019 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; 1020 vbt_size -= OPREGION_VBT_OFFSET; 1021 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) { 1022 drm_dbg_kms(display->drm, 1023 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); 1024 opregion->vbt = vbt; 1025 opregion->vbt_size = vbt_size; 1026 } else { 1027 drm_dbg_kms(display->drm, 1028 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); 1029 } 1030 1031 out: 1032 return 0; 1033 1034 err_out: 1035 memunmap(base); 1036 err_memremap: 1037 kfree(opregion); 1038 display->opregion = NULL; 1039 1040 return err; 1041 } 1042 1043 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id) 1044 { 1045 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident); 1046 return 1; 1047 } 1048 1049 static const struct dmi_system_id intel_use_opregion_panel_type[] = { 1050 { 1051 .callback = intel_use_opregion_panel_type_callback, 1052 .ident = "Conrac GmbH IX45GM2", 1053 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"), 1054 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"), 1055 }, 1056 }, 1057 { } 1058 }; 1059 1060 int 1061 intel_opregion_get_panel_type(struct intel_display *display) 1062 { 1063 u32 panel_details; 1064 int ret; 1065 1066 ret = swsci(display, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details); 1067 if (ret) 1068 return ret; 1069 1070 ret = (panel_details >> 8) & 0xff; 1071 if (ret > 0x10) { 1072 drm_dbg_kms(display->drm, 1073 "Invalid OpRegion panel type 0x%x\n", ret); 1074 return -EINVAL; 1075 } 1076 1077 /* fall back to VBT panel type? */ 1078 if (ret == 0x0) { 1079 drm_dbg_kms(display->drm, "No panel type in OpRegion\n"); 1080 return -ENODEV; 1081 } 1082 1083 /* 1084 * So far we know that some machined must use it, others must not use it. 1085 * There doesn't seem to be any way to determine which way to go, except 1086 * via a quirk list :( 1087 */ 1088 if (!dmi_check_system(intel_use_opregion_panel_type)) { 1089 drm_dbg_kms(display->drm, 1090 "Ignoring OpRegion panel type (%d)\n", ret - 1); 1091 return -ENODEV; 1092 } 1093 1094 return ret - 1; 1095 } 1096 1097 /** 1098 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5 1099 * @connector: eDP connector 1100 * 1101 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed 1102 * to it. 1103 * 1104 * Returns: 1105 * The EDID in the OpRegion, or NULL if there is none or it's invalid. 1106 * 1107 */ 1108 const struct drm_edid *intel_opregion_get_edid(struct intel_connector *connector) 1109 { 1110 struct intel_display *display = to_intel_display(connector); 1111 struct intel_opregion *opregion = display->opregion; 1112 const struct drm_edid *drm_edid; 1113 const void *edid; 1114 int len; 1115 1116 if (!opregion || !opregion->asle_ext) 1117 return NULL; 1118 1119 edid = opregion->asle_ext->bddc; 1120 1121 /* Validity corresponds to number of 128-byte blocks */ 1122 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128; 1123 if (!len || mem_is_zero(edid, len)) 1124 return NULL; 1125 1126 drm_edid = drm_edid_alloc(edid, len); 1127 1128 if (!drm_edid_valid(drm_edid)) { 1129 drm_dbg_kms(display->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n"); 1130 drm_edid_free(drm_edid); 1131 drm_edid = NULL; 1132 } 1133 1134 return drm_edid; 1135 } 1136 1137 bool intel_opregion_vbt_present(struct intel_display *display) 1138 { 1139 struct intel_opregion *opregion = display->opregion; 1140 1141 if (!opregion || !opregion->vbt) 1142 return false; 1143 1144 return true; 1145 } 1146 1147 const void *intel_opregion_get_vbt(struct intel_display *display, size_t *size) 1148 { 1149 struct intel_opregion *opregion = display->opregion; 1150 1151 if (!opregion || !opregion->vbt) 1152 return NULL; 1153 1154 if (size) 1155 *size = opregion->vbt_size; 1156 1157 return kmemdup(opregion->vbt, opregion->vbt_size, GFP_KERNEL); 1158 } 1159 1160 bool intel_opregion_headless_sku(struct intel_display *display) 1161 { 1162 struct intel_opregion *opregion = display->opregion; 1163 struct opregion_header *header; 1164 1165 if (!opregion) 1166 return false; 1167 1168 header = opregion->header; 1169 1170 if (!header || header->over.major < 2 || 1171 (header->over.major == 2 && header->over.minor < 3)) 1172 return false; 1173 1174 return opregion->header->pcon & PCON_HEADLESS_SKU; 1175 } 1176 1177 void intel_opregion_register(struct intel_display *display) 1178 { 1179 struct intel_opregion *opregion = display->opregion; 1180 1181 if (!opregion) 1182 return; 1183 1184 if (opregion->acpi) { 1185 opregion->acpi_notifier.notifier_call = 1186 intel_opregion_video_event; 1187 register_acpi_notifier(&opregion->acpi_notifier); 1188 } 1189 1190 intel_opregion_resume(display); 1191 } 1192 1193 static void intel_opregion_resume_display(struct intel_display *display) 1194 { 1195 struct intel_opregion *opregion = display->opregion; 1196 1197 if (opregion->acpi) { 1198 intel_didl_outputs(display); 1199 intel_setup_cadls(display); 1200 1201 /* 1202 * Notify BIOS we are ready to handle ACPI video ext notifs. 1203 * Right now, all the events are handled by the ACPI video 1204 * module. We don't actually need to do anything with them. 1205 */ 1206 opregion->acpi->csts = 0; 1207 opregion->acpi->drdy = 1; 1208 } 1209 1210 if (opregion->asle) { 1211 opregion->asle->tche = ASLE_TCHE_BLC_EN; 1212 opregion->asle->ardy = ASLE_ARDY_READY; 1213 } 1214 1215 /* Some platforms abuse the _DSM to enable MUX */ 1216 intel_dsm_get_bios_data_funcs_supported(display); 1217 } 1218 1219 void intel_opregion_resume(struct intel_display *display) 1220 { 1221 struct intel_opregion *opregion = display->opregion; 1222 1223 if (!opregion) 1224 return; 1225 1226 if (HAS_DISPLAY(display)) 1227 intel_opregion_resume_display(display); 1228 1229 intel_opregion_notify_adapter(display, PCI_D0); 1230 } 1231 1232 static void intel_opregion_suspend_display(struct intel_display *display) 1233 { 1234 struct intel_opregion *opregion = display->opregion; 1235 1236 if (opregion->asle) 1237 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 1238 1239 cancel_work_sync(&opregion->asle_work); 1240 1241 if (opregion->acpi) 1242 opregion->acpi->drdy = 0; 1243 } 1244 1245 void intel_opregion_suspend(struct intel_display *display, pci_power_t state) 1246 { 1247 struct intel_opregion *opregion = display->opregion; 1248 1249 if (!opregion) 1250 return; 1251 1252 intel_opregion_notify_adapter(display, state); 1253 1254 if (HAS_DISPLAY(display)) 1255 intel_opregion_suspend_display(display); 1256 } 1257 1258 void intel_opregion_unregister(struct intel_display *display) 1259 { 1260 struct intel_opregion *opregion = display->opregion; 1261 1262 intel_opregion_suspend(display, PCI_D1); 1263 1264 if (!opregion) 1265 return; 1266 1267 if (opregion->acpi_notifier.notifier_call) { 1268 unregister_acpi_notifier(&opregion->acpi_notifier); 1269 opregion->acpi_notifier.notifier_call = NULL; 1270 } 1271 } 1272 1273 void intel_opregion_cleanup(struct intel_display *display) 1274 { 1275 struct intel_opregion *opregion = display->opregion; 1276 1277 if (!opregion) 1278 return; 1279 1280 memunmap(opregion->header); 1281 if (opregion->rvda) 1282 memunmap(opregion->rvda); 1283 kfree(opregion); 1284 display->opregion = NULL; 1285 } 1286 1287 static int intel_opregion_show(struct seq_file *m, void *unused) 1288 { 1289 struct intel_display *display = m->private; 1290 struct intel_opregion *opregion = display->opregion; 1291 1292 if (opregion) 1293 seq_write(m, opregion->header, OPREGION_SIZE); 1294 1295 return 0; 1296 } 1297 1298 DEFINE_SHOW_ATTRIBUTE(intel_opregion); 1299 1300 void intel_opregion_debugfs_register(struct intel_display *display) 1301 { 1302 struct drm_minor *minor = display->drm->primary; 1303 1304 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root, 1305 display, &intel_opregion_fops); 1306 } 1307