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 35 #include "i915_drv.h" 36 #include "intel_acpi.h" 37 #include "intel_backlight.h" 38 #include "intel_display_core.h" 39 #include "intel_display_types.h" 40 #include "intel_opregion.h" 41 #include "intel_pci_config.h" 42 43 #define OPREGION_HEADER_OFFSET 0 44 #define OPREGION_ACPI_OFFSET 0x100 45 #define ACPI_CLID 0x01ac /* current lid state indicator */ 46 #define ACPI_CDCK 0x01b0 /* current docking state indicator */ 47 #define OPREGION_SWSCI_OFFSET 0x200 48 #define OPREGION_ASLE_OFFSET 0x300 49 #define OPREGION_VBT_OFFSET 0x400 50 #define OPREGION_ASLE_EXT_OFFSET 0x1C00 51 52 #define OPREGION_SIGNATURE "IntelGraphicsMem" 53 #define MBOX_ACPI BIT(0) /* Mailbox #1 */ 54 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */ 55 #define MBOX_ASLE BIT(2) /* Mailbox #3 */ 56 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */ 57 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */ 58 59 #define PCON_HEADLESS_SKU BIT(13) 60 61 struct opregion_header { 62 u8 signature[16]; 63 u32 size; 64 struct { 65 u8 rsvd; 66 u8 revision; 67 u8 minor; 68 u8 major; 69 } __packed over; 70 u8 bios_ver[32]; 71 u8 vbios_ver[16]; 72 u8 driver_ver[16]; 73 u32 mboxes; 74 u32 driver_model; 75 u32 pcon; 76 u8 dver[32]; 77 u8 rsvd[124]; 78 } __packed; 79 80 /* OpRegion mailbox #1: public ACPI methods */ 81 struct opregion_acpi { 82 u32 drdy; /* driver readiness */ 83 u32 csts; /* notification status */ 84 u32 cevt; /* current event */ 85 u8 rsvd1[20]; 86 u32 didl[8]; /* supported display devices ID list */ 87 u32 cpdl[8]; /* currently presented display list */ 88 u32 cadl[8]; /* currently active display list */ 89 u32 nadl[8]; /* next active devices list */ 90 u32 aslp; /* ASL sleep time-out */ 91 u32 tidx; /* toggle table index */ 92 u32 chpd; /* current hotplug enable indicator */ 93 u32 clid; /* current lid state*/ 94 u32 cdck; /* current docking state */ 95 u32 sxsw; /* Sx state resume */ 96 u32 evts; /* ASL supported events */ 97 u32 cnot; /* current OS notification */ 98 u32 nrdy; /* driver status */ 99 u32 did2[7]; /* extended supported display devices ID list */ 100 u32 cpd2[7]; /* extended attached display devices list */ 101 u8 rsvd2[4]; 102 } __packed; 103 104 /* OpRegion mailbox #2: SWSCI */ 105 struct opregion_swsci { 106 u32 scic; /* SWSCI command|status|data */ 107 u32 parm; /* command parameters */ 108 u32 dslp; /* driver sleep time-out */ 109 u8 rsvd[244]; 110 } __packed; 111 112 /* OpRegion mailbox #3: ASLE */ 113 struct opregion_asle { 114 u32 ardy; /* driver readiness */ 115 u32 aslc; /* ASLE interrupt command */ 116 u32 tche; /* technology enabled indicator */ 117 u32 alsi; /* current ALS illuminance reading */ 118 u32 bclp; /* backlight brightness to set */ 119 u32 pfit; /* panel fitting state */ 120 u32 cblv; /* current brightness level */ 121 u16 bclm[20]; /* backlight level duty cycle mapping table */ 122 u32 cpfm; /* current panel fitting mode */ 123 u32 epfm; /* enabled panel fitting modes */ 124 u8 plut[74]; /* panel LUT and identifier */ 125 u32 pfmb; /* PWM freq and min brightness */ 126 u32 cddv; /* color correction default values */ 127 u32 pcft; /* power conservation features */ 128 u32 srot; /* supported rotation angles */ 129 u32 iuer; /* IUER events */ 130 u64 fdss; 131 u32 fdsp; 132 u32 stat; 133 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+) 134 * address of raw VBT data. */ 135 u32 rvds; /* Size of raw vbt data */ 136 u8 rsvd[58]; 137 } __packed; 138 139 /* OpRegion mailbox #5: ASLE ext */ 140 struct opregion_asle_ext { 141 u32 phed; /* Panel Header */ 142 u8 bddc[256]; /* Panel EDID */ 143 u8 rsvd[764]; 144 } __packed; 145 146 /* Driver readiness indicator */ 147 #define ASLE_ARDY_READY (1 << 0) 148 #define ASLE_ARDY_NOT_READY (0 << 0) 149 150 /* ASLE Interrupt Command (ASLC) bits */ 151 #define ASLC_SET_ALS_ILLUM (1 << 0) 152 #define ASLC_SET_BACKLIGHT (1 << 1) 153 #define ASLC_SET_PFIT (1 << 2) 154 #define ASLC_SET_PWM_FREQ (1 << 3) 155 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4) 156 #define ASLC_BUTTON_ARRAY (1 << 5) 157 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6) 158 #define ASLC_DOCKING_INDICATOR (1 << 7) 159 #define ASLC_ISCT_STATE_CHANGE (1 << 8) 160 #define ASLC_REQ_MSK 0x1ff 161 /* response bits */ 162 #define ASLC_ALS_ILLUM_FAILED (1 << 10) 163 #define ASLC_BACKLIGHT_FAILED (1 << 12) 164 #define ASLC_PFIT_FAILED (1 << 14) 165 #define ASLC_PWM_FREQ_FAILED (1 << 16) 166 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18) 167 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20) 168 #define ASLC_CONVERTIBLE_FAILED (1 << 22) 169 #define ASLC_DOCKING_FAILED (1 << 24) 170 #define ASLC_ISCT_STATE_FAILED (1 << 26) 171 172 /* Technology enabled indicator */ 173 #define ASLE_TCHE_ALS_EN (1 << 0) 174 #define ASLE_TCHE_BLC_EN (1 << 1) 175 #define ASLE_TCHE_PFIT_EN (1 << 2) 176 #define ASLE_TCHE_PFMB_EN (1 << 3) 177 178 /* ASLE backlight brightness to set */ 179 #define ASLE_BCLP_VALID (1<<31) 180 #define ASLE_BCLP_MSK (~(1<<31)) 181 182 /* ASLE panel fitting request */ 183 #define ASLE_PFIT_VALID (1<<31) 184 #define ASLE_PFIT_CENTER (1<<0) 185 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 186 #define ASLE_PFIT_STRETCH_GFX (1<<2) 187 188 /* PWM frequency and minimum brightness */ 189 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 190 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 191 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 192 #define ASLE_PFMB_PWM_VALID (1<<31) 193 194 #define ASLE_CBLV_VALID (1<<31) 195 196 /* IUER */ 197 #define ASLE_IUER_DOCKING (1 << 7) 198 #define ASLE_IUER_CONVERTIBLE (1 << 6) 199 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4) 200 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3) 201 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2) 202 #define ASLE_IUER_WINDOWS_BTN (1 << 1) 203 #define ASLE_IUER_POWER_BTN (1 << 0) 204 205 #define ASLE_PHED_EDID_VALID_MASK 0x3 206 207 /* Software System Control Interrupt (SWSCI) */ 208 #define SWSCI_SCIC_INDICATOR (1 << 0) 209 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 210 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1) 211 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8 212 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8) 213 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8 214 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8) 215 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5 216 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5) 217 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1 218 219 #define SWSCI_FUNCTION_CODE(main, sub) \ 220 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \ 221 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT) 222 223 /* SWSCI: Get BIOS Data (GBDA) */ 224 #define SWSCI_GBDA 4 225 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0) 226 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1) 227 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4) 228 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5) 229 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6) 230 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7) 231 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10) 232 233 /* SWSCI: System BIOS Callbacks (SBCB) */ 234 #define SWSCI_SBCB 6 235 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0) 236 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1) 237 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3) 238 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4) 239 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5) 240 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6) 241 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7) 242 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8) 243 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9) 244 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10) 245 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11) 246 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16) 247 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17) 248 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18) 249 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19) 250 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21) 251 252 #define MAX_DSLP 1500 253 254 #define OPREGION_SIZE (8 * 1024) 255 256 struct intel_opregion { 257 struct intel_display *display; 258 259 struct opregion_header *header; 260 struct opregion_acpi *acpi; 261 struct opregion_swsci *swsci; 262 u32 swsci_gbda_sub_functions; 263 u32 swsci_sbcb_sub_functions; 264 struct opregion_asle *asle; 265 struct opregion_asle_ext *asle_ext; 266 void *rvda; 267 const void *vbt; 268 u32 vbt_size; 269 struct work_struct asle_work; 270 struct notifier_block acpi_notifier; 271 }; 272 273 static int check_swsci_function(struct intel_display *display, u32 function) 274 { 275 struct intel_opregion *opregion = display->opregion; 276 struct opregion_swsci *swsci; 277 u32 main_function, sub_function; 278 279 if (!opregion) 280 return -ENODEV; 281 282 swsci = opregion->swsci; 283 if (!swsci) 284 return -ENODEV; 285 286 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> 287 SWSCI_SCIC_MAIN_FUNCTION_SHIFT; 288 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> 289 SWSCI_SCIC_SUB_FUNCTION_SHIFT; 290 291 /* Check if we can call the function. See swsci_setup for details. */ 292 if (main_function == SWSCI_SBCB) { 293 if ((opregion->swsci_sbcb_sub_functions & 294 (1 << sub_function)) == 0) 295 return -EINVAL; 296 } else if (main_function == SWSCI_GBDA) { 297 if ((opregion->swsci_gbda_sub_functions & 298 (1 << sub_function)) == 0) 299 return -EINVAL; 300 } 301 302 return 0; 303 } 304 305 static int swsci(struct intel_display *display, 306 u32 function, u32 parm, u32 *parm_out) 307 { 308 struct opregion_swsci *swsci; 309 struct pci_dev *pdev = to_pci_dev(display->drm->dev); 310 u32 scic, dslp; 311 u16 swsci_val; 312 int ret; 313 314 ret = check_swsci_function(display, function); 315 if (ret) 316 return ret; 317 318 swsci = display->opregion->swsci; 319 320 /* Driver sleep timeout in ms. */ 321 dslp = swsci->dslp; 322 if (!dslp) { 323 /* The spec says 2ms should be the default, but it's too small 324 * for some machines. */ 325 dslp = 50; 326 } else if (dslp > MAX_DSLP) { 327 /* Hey bios, trust must be earned. */ 328 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, " 329 "using %u ms instead\n", dslp, MAX_DSLP); 330 dslp = MAX_DSLP; 331 } 332 333 /* The spec tells us to do this, but we are the only user... */ 334 scic = swsci->scic; 335 if (scic & SWSCI_SCIC_INDICATOR) { 336 drm_dbg(display->drm, "SWSCI request already in progress\n"); 337 return -EBUSY; 338 } 339 340 scic = function | SWSCI_SCIC_INDICATOR; 341 342 swsci->parm = parm; 343 swsci->scic = scic; 344 345 /* Ensure SCI event is selected and event trigger is cleared. */ 346 pci_read_config_word(pdev, SWSCI, &swsci_val); 347 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) { 348 swsci_val |= SWSCI_SCISEL; 349 swsci_val &= ~SWSCI_GSSCIE; 350 pci_write_config_word(pdev, SWSCI, swsci_val); 351 } 352 353 /* Use event trigger to tell bios to check the mail. */ 354 swsci_val |= SWSCI_GSSCIE; 355 pci_write_config_word(pdev, SWSCI, swsci_val); 356 357 /* Poll for the result. */ 358 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0) 359 if (wait_for(C, dslp)) { 360 drm_dbg(display->drm, "SWSCI request timed out\n"); 361 return -ETIMEDOUT; 362 } 363 364 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >> 365 SWSCI_SCIC_EXIT_STATUS_SHIFT; 366 367 /* Note: scic == 0 is an error! */ 368 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) { 369 drm_dbg(display->drm, "SWSCI request error %u\n", scic); 370 return -EIO; 371 } 372 373 if (parm_out) 374 *parm_out = swsci->parm; 375 376 return 0; 377 378 #undef C 379 } 380 381 #define DISPLAY_TYPE_CRT 0 382 #define DISPLAY_TYPE_TV 1 383 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2 384 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3 385 386 int intel_opregion_notify_encoder(struct intel_encoder *encoder, 387 bool enable) 388 { 389 struct intel_display *display = to_intel_display(encoder); 390 u32 parm = 0; 391 u32 type = 0; 392 u32 port; 393 int ret; 394 395 /* don't care about old stuff for now */ 396 if (!HAS_DDI(display)) 397 return 0; 398 399 /* Avoid port out of bounds checks if SWSCI isn't there. */ 400 ret = check_swsci_function(display, SWSCI_SBCB_DISPLAY_POWER_STATE); 401 if (ret) 402 return ret; 403 404 if (encoder->type == INTEL_OUTPUT_DSI) 405 port = 0; 406 else 407 port = encoder->port; 408 409 if (port == PORT_E) { 410 port = 0; 411 } else { 412 parm |= 1 << port; 413 port++; 414 } 415 416 /* 417 * The port numbering and mapping here is bizarre. The now-obsolete 418 * swsci spec supports ports numbered [0..4]. Port E is handled as a 419 * special case, but port F and beyond are not. The functionality is 420 * supposed to be obsolete for new platforms. Just bail out if the port 421 * number is out of bounds after mapping. 422 */ 423 if (port > 4) { 424 drm_dbg_kms(display->drm, 425 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n", 426 encoder->base.base.id, encoder->base.name, 427 port_name(encoder->port), port); 428 return -EINVAL; 429 } 430 431 if (!enable) 432 parm |= 4 << 8; 433 434 switch (encoder->type) { 435 case INTEL_OUTPUT_ANALOG: 436 type = DISPLAY_TYPE_CRT; 437 break; 438 case INTEL_OUTPUT_DDI: 439 case INTEL_OUTPUT_DP: 440 case INTEL_OUTPUT_HDMI: 441 case INTEL_OUTPUT_DP_MST: 442 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; 443 break; 444 case INTEL_OUTPUT_EDP: 445 case INTEL_OUTPUT_DSI: 446 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; 447 break; 448 default: 449 drm_WARN_ONCE(display->drm, 1, 450 "unsupported intel_encoder type %d\n", 451 encoder->type); 452 return -EINVAL; 453 } 454 455 parm |= type << (16 + port * 3); 456 457 return swsci(display, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); 458 } 459 460 static const struct { 461 pci_power_t pci_power_state; 462 u32 parm; 463 } power_state_map[] = { 464 { PCI_D0, 0x00 }, 465 { PCI_D1, 0x01 }, 466 { PCI_D2, 0x02 }, 467 { PCI_D3hot, 0x04 }, 468 { PCI_D3cold, 0x04 }, 469 }; 470 471 int intel_opregion_notify_adapter(struct intel_display *display, 472 pci_power_t state) 473 { 474 int i; 475 476 if (!HAS_DDI(display)) 477 return 0; 478 479 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { 480 if (state == power_state_map[i].pci_power_state) 481 return swsci(display, SWSCI_SBCB_ADAPTER_POWER_STATE, 482 power_state_map[i].parm, NULL); 483 } 484 485 return -EINVAL; 486 } 487 488 static u32 asle_set_backlight(struct intel_display *display, u32 bclp) 489 { 490 struct intel_connector *connector; 491 struct drm_connector_list_iter conn_iter; 492 struct opregion_asle *asle = display->opregion->asle; 493 494 drm_dbg(display->drm, "bclp = 0x%08x\n", bclp); 495 496 if (acpi_video_get_backlight_type() == acpi_backlight_native) { 497 drm_dbg_kms(display->drm, 498 "opregion backlight request ignored\n"); 499 return 0; 500 } 501 502 if (!(bclp & ASLE_BCLP_VALID)) 503 return ASLC_BACKLIGHT_FAILED; 504 505 bclp &= ASLE_BCLP_MSK; 506 if (bclp > 255) 507 return ASLC_BACKLIGHT_FAILED; 508 509 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL); 510 511 /* 512 * Update backlight on all connectors that support backlight (usually 513 * only one). 514 */ 515 drm_dbg_kms(display->drm, "updating opregion backlight %d/255\n", 516 bclp); 517 drm_connector_list_iter_begin(display->drm, &conn_iter); 518 for_each_intel_connector_iter(connector, &conn_iter) 519 intel_backlight_set_acpi(connector->base.state, bclp, 255); 520 drm_connector_list_iter_end(&conn_iter); 521 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID; 522 523 drm_modeset_unlock(&display->drm->mode_config.connection_mutex); 524 525 526 return 0; 527 } 528 529 static u32 asle_set_als_illum(struct intel_display *display, u32 alsi) 530 { 531 /* alsi is the current ALS reading in lux. 0 indicates below sensor 532 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 533 drm_dbg(display->drm, "Illum is not supported\n"); 534 return ASLC_ALS_ILLUM_FAILED; 535 } 536 537 static u32 asle_set_pwm_freq(struct intel_display *display, u32 pfmb) 538 { 539 drm_dbg(display->drm, "PWM freq is not supported\n"); 540 return ASLC_PWM_FREQ_FAILED; 541 } 542 543 static u32 asle_set_pfit(struct intel_display *display, u32 pfit) 544 { 545 /* Panel fitting is currently controlled by the X code, so this is a 546 noop until modesetting support works fully */ 547 drm_dbg(display->drm, "Pfit is not supported\n"); 548 return ASLC_PFIT_FAILED; 549 } 550 551 static u32 asle_set_supported_rotation_angles(struct intel_display *display, u32 srot) 552 { 553 drm_dbg(display->drm, "SROT is not supported\n"); 554 return ASLC_ROTATION_ANGLES_FAILED; 555 } 556 557 static u32 asle_set_button_array(struct intel_display *display, u32 iuer) 558 { 559 if (!iuer) 560 drm_dbg(display->drm, 561 "Button array event is not supported (nothing)\n"); 562 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 563 drm_dbg(display->drm, 564 "Button array event is not supported (rotation lock)\n"); 565 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 566 drm_dbg(display->drm, 567 "Button array event is not supported (volume down)\n"); 568 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 569 drm_dbg(display->drm, 570 "Button array event is not supported (volume up)\n"); 571 if (iuer & ASLE_IUER_WINDOWS_BTN) 572 drm_dbg(display->drm, 573 "Button array event is not supported (windows)\n"); 574 if (iuer & ASLE_IUER_POWER_BTN) 575 drm_dbg(display->drm, 576 "Button array event is not supported (power)\n"); 577 578 return ASLC_BUTTON_ARRAY_FAILED; 579 } 580 581 static u32 asle_set_convertible(struct intel_display *display, u32 iuer) 582 { 583 if (iuer & ASLE_IUER_CONVERTIBLE) 584 drm_dbg(display->drm, 585 "Convertible is not supported (clamshell)\n"); 586 else 587 drm_dbg(display->drm, 588 "Convertible is not supported (slate)\n"); 589 590 return ASLC_CONVERTIBLE_FAILED; 591 } 592 593 static u32 asle_set_docking(struct intel_display *display, u32 iuer) 594 { 595 if (iuer & ASLE_IUER_DOCKING) 596 drm_dbg(display->drm, "Docking is not supported (docked)\n"); 597 else 598 drm_dbg(display->drm, 599 "Docking is not supported (undocked)\n"); 600 601 return ASLC_DOCKING_FAILED; 602 } 603 604 static u32 asle_isct_state(struct intel_display *display) 605 { 606 drm_dbg(display->drm, "ISCT is not supported\n"); 607 return ASLC_ISCT_STATE_FAILED; 608 } 609 610 static void asle_work(struct work_struct *work) 611 { 612 struct intel_opregion *opregion = 613 container_of(work, struct intel_opregion, asle_work); 614 struct intel_display *display = opregion->display; 615 struct opregion_asle *asle = opregion->asle; 616 u32 aslc_stat = 0; 617 u32 aslc_req; 618 619 if (!asle) 620 return; 621 622 aslc_req = asle->aslc; 623 624 if (!(aslc_req & ASLC_REQ_MSK)) { 625 drm_dbg(display->drm, 626 "No request on ASLC interrupt 0x%08x\n", aslc_req); 627 return; 628 } 629 630 if (aslc_req & ASLC_SET_ALS_ILLUM) 631 aslc_stat |= asle_set_als_illum(display, asle->alsi); 632 633 if (aslc_req & ASLC_SET_BACKLIGHT) 634 aslc_stat |= asle_set_backlight(display, asle->bclp); 635 636 if (aslc_req & ASLC_SET_PFIT) 637 aslc_stat |= asle_set_pfit(display, asle->pfit); 638 639 if (aslc_req & ASLC_SET_PWM_FREQ) 640 aslc_stat |= asle_set_pwm_freq(display, asle->pfmb); 641 642 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 643 aslc_stat |= asle_set_supported_rotation_angles(display, 644 asle->srot); 645 646 if (aslc_req & ASLC_BUTTON_ARRAY) 647 aslc_stat |= asle_set_button_array(display, asle->iuer); 648 649 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 650 aslc_stat |= asle_set_convertible(display, asle->iuer); 651 652 if (aslc_req & ASLC_DOCKING_INDICATOR) 653 aslc_stat |= asle_set_docking(display, asle->iuer); 654 655 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 656 aslc_stat |= asle_isct_state(display); 657 658 asle->aslc = aslc_stat; 659 } 660 661 bool intel_opregion_asle_present(struct intel_display *display) 662 { 663 return display->opregion && display->opregion->asle; 664 } 665 666 void intel_opregion_asle_intr(struct intel_display *display) 667 { 668 struct drm_i915_private *i915 = to_i915(display->drm); 669 struct intel_opregion *opregion = display->opregion; 670 671 if (opregion && opregion->asle) 672 queue_work(i915->unordered_wq, &opregion->asle_work); 673 } 674 675 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 676 #define ACPI_EV_LID (1<<1) 677 #define ACPI_EV_DOCK (1<<2) 678 679 /* 680 * The only video events relevant to opregion are 0x80. These indicate either a 681 * docking event, lid switch or display switch request. In Linux, these are 682 * handled by the dock, button and video drivers. 683 */ 684 static int intel_opregion_video_event(struct notifier_block *nb, 685 unsigned long val, void *data) 686 { 687 struct intel_opregion *opregion = container_of(nb, struct intel_opregion, 688 acpi_notifier); 689 struct acpi_bus_event *event = data; 690 struct opregion_acpi *acpi; 691 int ret = NOTIFY_OK; 692 693 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 694 return NOTIFY_DONE; 695 696 acpi = opregion->acpi; 697 698 if (event->type == 0x80 && ((acpi->cevt & 1) == 0)) 699 ret = NOTIFY_BAD; 700 701 acpi->csts = 0; 702 703 return ret; 704 } 705 706 /* 707 * Initialise the DIDL field in opregion. This passes a list of devices to 708 * the firmware. Values are defined by section B.4.2 of the ACPI specification 709 * (version 3) 710 */ 711 712 static void set_did(struct intel_opregion *opregion, int i, u32 val) 713 { 714 if (i < ARRAY_SIZE(opregion->acpi->didl)) { 715 opregion->acpi->didl[i] = val; 716 } else { 717 i -= ARRAY_SIZE(opregion->acpi->didl); 718 719 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) 720 return; 721 722 opregion->acpi->did2[i] = val; 723 } 724 } 725 726 static void intel_didl_outputs(struct intel_display *display) 727 { 728 struct intel_opregion *opregion = display->opregion; 729 struct intel_connector *connector; 730 struct drm_connector_list_iter conn_iter; 731 int i = 0, max_outputs; 732 733 /* 734 * In theory, did2, the extended didl, gets added at opregion version 735 * 3.0. In practice, however, we're supposed to set it for earlier 736 * versions as well, since a BIOS that doesn't understand did2 should 737 * not look at it anyway. Use a variable so we can tweak this if a need 738 * arises later. 739 */ 740 max_outputs = ARRAY_SIZE(opregion->acpi->didl) + 741 ARRAY_SIZE(opregion->acpi->did2); 742 743 intel_acpi_device_id_update(display); 744 745 drm_connector_list_iter_begin(display->drm, &conn_iter); 746 for_each_intel_connector_iter(connector, &conn_iter) { 747 if (i < max_outputs) 748 set_did(opregion, i, connector->acpi_device_id); 749 i++; 750 } 751 drm_connector_list_iter_end(&conn_iter); 752 753 drm_dbg_kms(display->drm, "%d outputs detected\n", i); 754 755 if (i > max_outputs) 756 drm_err(display->drm, 757 "More than %d outputs in connector list\n", 758 max_outputs); 759 760 /* If fewer than max outputs, the list must be null terminated */ 761 if (i < max_outputs) 762 set_did(opregion, i, 0); 763 } 764 765 static void intel_setup_cadls(struct intel_display *display) 766 { 767 struct intel_opregion *opregion = display->opregion; 768 struct intel_connector *connector; 769 struct drm_connector_list_iter conn_iter; 770 int i = 0; 771 772 /* 773 * Initialize the CADL field from the connector device ids. This is 774 * essentially the same as copying from the DIDL. Technically, this is 775 * not always correct as display outputs may exist, but not active. This 776 * initialization is necessary for some Clevo laptops that check this 777 * field before processing the brightness and display switching hotkeys. 778 * 779 * Note that internal panels should be at the front of the connector 780 * list already, ensuring they're not left out. 781 */ 782 drm_connector_list_iter_begin(display->drm, &conn_iter); 783 for_each_intel_connector_iter(connector, &conn_iter) { 784 if (i >= ARRAY_SIZE(opregion->acpi->cadl)) 785 break; 786 opregion->acpi->cadl[i++] = connector->acpi_device_id; 787 } 788 drm_connector_list_iter_end(&conn_iter); 789 790 /* If fewer than 8 active devices, the list must be null terminated */ 791 if (i < ARRAY_SIZE(opregion->acpi->cadl)) 792 opregion->acpi->cadl[i] = 0; 793 } 794 795 static void swsci_setup(struct intel_display *display) 796 { 797 struct intel_opregion *opregion = display->opregion; 798 bool requested_callbacks = false; 799 u32 tmp; 800 801 /* Sub-function code 0 is okay, let's allow them. */ 802 opregion->swsci_gbda_sub_functions = 1; 803 opregion->swsci_sbcb_sub_functions = 1; 804 805 /* We use GBDA to ask for supported GBDA calls. */ 806 if (swsci(display, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 807 /* make the bits match the sub-function codes */ 808 tmp <<= 1; 809 opregion->swsci_gbda_sub_functions |= tmp; 810 } 811 812 /* 813 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 814 * must not call interfaces that are not specifically requested by the 815 * bios. 816 */ 817 if (swsci(display, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 818 /* here, the bits already match sub-function codes */ 819 opregion->swsci_sbcb_sub_functions |= tmp; 820 requested_callbacks = true; 821 } 822 823 /* 824 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 825 * the callback is _requested_. But we still can't call interfaces that 826 * are not requested. 827 */ 828 if (swsci(display, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 829 /* make the bits match the sub-function codes */ 830 u32 low = tmp & 0x7ff; 831 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 832 tmp = (high << 4) | (low << 1) | 1; 833 834 /* best guess what to do with supported wrt requested */ 835 if (requested_callbacks) { 836 u32 req = opregion->swsci_sbcb_sub_functions; 837 if ((req & tmp) != req) 838 drm_dbg(display->drm, 839 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", 840 req, tmp); 841 /* XXX: for now, trust the requested callbacks */ 842 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 843 } else { 844 opregion->swsci_sbcb_sub_functions |= tmp; 845 } 846 } 847 848 drm_dbg(display->drm, 849 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 850 opregion->swsci_gbda_sub_functions, 851 opregion->swsci_sbcb_sub_functions); 852 } 853 854 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 855 { 856 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 857 "VBIOS ROM for %s\n", id->ident); 858 return 1; 859 } 860 861 static const struct dmi_system_id intel_no_opregion_vbt[] = { 862 { 863 .callback = intel_no_opregion_vbt_callback, 864 .ident = "ThinkCentre A57", 865 .matches = { 866 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 867 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 868 }, 869 }, 870 { } 871 }; 872 873 int intel_opregion_setup(struct intel_display *display) 874 { 875 struct intel_opregion *opregion; 876 struct pci_dev *pdev = to_pci_dev(display->drm->dev); 877 u32 asls, mboxes; 878 char buf[sizeof(OPREGION_SIGNATURE)]; 879 int err = 0; 880 void *base; 881 const void *vbt; 882 u32 vbt_size; 883 884 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); 885 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); 886 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); 887 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 888 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400); 889 890 pci_read_config_dword(pdev, ASLS, &asls); 891 drm_dbg(display->drm, "graphic opregion physical addr: 0x%x\n", 892 asls); 893 if (asls == 0) { 894 drm_dbg(display->drm, "ACPI OpRegion not supported!\n"); 895 return -ENOTSUPP; 896 } 897 898 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL); 899 if (!opregion) 900 return -ENOMEM; 901 902 opregion->display = display; 903 display->opregion = opregion; 904 905 INIT_WORK(&opregion->asle_work, asle_work); 906 907 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB); 908 if (!base) { 909 err = -ENOMEM; 910 goto err_memremap; 911 } 912 913 memcpy(buf, base, sizeof(buf)); 914 915 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 916 drm_dbg(display->drm, "opregion signature mismatch\n"); 917 err = -EINVAL; 918 goto err_out; 919 } 920 opregion->header = base; 921 922 drm_dbg(display->drm, "ACPI OpRegion version %u.%u.%u\n", 923 opregion->header->over.major, 924 opregion->header->over.minor, 925 opregion->header->over.revision); 926 927 mboxes = opregion->header->mboxes; 928 if (mboxes & MBOX_ACPI) { 929 drm_dbg(display->drm, "Public ACPI methods supported\n"); 930 opregion->acpi = base + OPREGION_ACPI_OFFSET; 931 /* 932 * Indicate we handle monitor hotplug events ourselves so we do 933 * not need ACPI notifications for them. Disabling these avoids 934 * triggering the AML code doing the notifation, which may be 935 * broken as Windows also seems to disable these. 936 */ 937 opregion->acpi->chpd = 1; 938 } 939 940 if (mboxes & MBOX_SWSCI) { 941 u8 major = opregion->header->over.major; 942 943 if (major >= 3) { 944 drm_err(display->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n"); 945 } else { 946 if (major >= 2) 947 drm_dbg(display->drm, "SWSCI Mailbox #2 present for opregion v2.x\n"); 948 drm_dbg(display->drm, "SWSCI supported\n"); 949 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 950 swsci_setup(display); 951 } 952 } 953 954 if (mboxes & MBOX_ASLE) { 955 drm_dbg(display->drm, "ASLE supported\n"); 956 opregion->asle = base + OPREGION_ASLE_OFFSET; 957 958 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 959 } 960 961 if (mboxes & MBOX_ASLE_EXT) { 962 drm_dbg(display->drm, "ASLE extension supported\n"); 963 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET; 964 } 965 966 if (mboxes & MBOX_BACKLIGHT) { 967 drm_dbg(display->drm, "Mailbox #2 for backlight present\n"); 968 } 969 970 if (dmi_check_system(intel_no_opregion_vbt)) 971 goto out; 972 973 if (opregion->header->over.major >= 2 && opregion->asle && 974 opregion->asle->rvda && opregion->asle->rvds) { 975 resource_size_t rvda = opregion->asle->rvda; 976 977 /* 978 * opregion 2.0: rvda is the physical VBT address. 979 * 980 * opregion 2.1+: rvda is unsigned, relative offset from 981 * opregion base, and should never point within opregion. 982 */ 983 if (opregion->header->over.major > 2 || 984 opregion->header->over.minor >= 1) { 985 drm_WARN_ON(display->drm, rvda < OPREGION_SIZE); 986 987 rvda += asls; 988 } 989 990 opregion->rvda = memremap(rvda, opregion->asle->rvds, 991 MEMREMAP_WB); 992 993 vbt = opregion->rvda; 994 vbt_size = opregion->asle->rvds; 995 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) { 996 drm_dbg_kms(display->drm, 997 "Found valid VBT in ACPI OpRegion (RVDA)\n"); 998 opregion->vbt = vbt; 999 opregion->vbt_size = vbt_size; 1000 goto out; 1001 } else { 1002 drm_dbg_kms(display->drm, 1003 "Invalid VBT in ACPI OpRegion (RVDA)\n"); 1004 memunmap(opregion->rvda); 1005 opregion->rvda = NULL; 1006 } 1007 } 1008 1009 vbt = base + OPREGION_VBT_OFFSET; 1010 /* 1011 * The VBT specification says that if the ASLE ext mailbox is not used 1012 * its area is reserved, but on some CHT boards the VBT extends into the 1013 * ASLE ext area. Allow this even though it is against the spec, so we 1014 * do not end up rejecting the VBT on those boards (and end up not 1015 * finding the LCD panel because of this). 1016 */ 1017 vbt_size = (mboxes & MBOX_ASLE_EXT) ? 1018 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; 1019 vbt_size -= OPREGION_VBT_OFFSET; 1020 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) { 1021 drm_dbg_kms(display->drm, 1022 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); 1023 opregion->vbt = vbt; 1024 opregion->vbt_size = vbt_size; 1025 } else { 1026 drm_dbg_kms(display->drm, 1027 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); 1028 } 1029 1030 out: 1031 return 0; 1032 1033 err_out: 1034 memunmap(base); 1035 err_memremap: 1036 kfree(opregion); 1037 display->opregion = NULL; 1038 1039 return err; 1040 } 1041 1042 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id) 1043 { 1044 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident); 1045 return 1; 1046 } 1047 1048 static const struct dmi_system_id intel_use_opregion_panel_type[] = { 1049 { 1050 .callback = intel_use_opregion_panel_type_callback, 1051 .ident = "Conrac GmbH IX45GM2", 1052 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"), 1053 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"), 1054 }, 1055 }, 1056 { } 1057 }; 1058 1059 int 1060 intel_opregion_get_panel_type(struct intel_display *display) 1061 { 1062 u32 panel_details; 1063 int ret; 1064 1065 ret = swsci(display, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details); 1066 if (ret) 1067 return ret; 1068 1069 ret = (panel_details >> 8) & 0xff; 1070 if (ret > 0x10) { 1071 drm_dbg_kms(display->drm, 1072 "Invalid OpRegion panel type 0x%x\n", ret); 1073 return -EINVAL; 1074 } 1075 1076 /* fall back to VBT panel type? */ 1077 if (ret == 0x0) { 1078 drm_dbg_kms(display->drm, "No panel type in OpRegion\n"); 1079 return -ENODEV; 1080 } 1081 1082 /* 1083 * So far we know that some machined must use it, others must not use it. 1084 * There doesn't seem to be any way to determine which way to go, except 1085 * via a quirk list :( 1086 */ 1087 if (!dmi_check_system(intel_use_opregion_panel_type)) { 1088 drm_dbg_kms(display->drm, 1089 "Ignoring OpRegion panel type (%d)\n", ret - 1); 1090 return -ENODEV; 1091 } 1092 1093 return ret - 1; 1094 } 1095 1096 /** 1097 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5 1098 * @connector: eDP connector 1099 * 1100 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed 1101 * to it. 1102 * 1103 * Returns: 1104 * The EDID in the OpRegion, or NULL if there is none or it's invalid. 1105 * 1106 */ 1107 const struct drm_edid *intel_opregion_get_edid(struct intel_connector *connector) 1108 { 1109 struct intel_display *display = to_intel_display(connector); 1110 struct intel_opregion *opregion = display->opregion; 1111 const struct drm_edid *drm_edid; 1112 const void *edid; 1113 int len; 1114 1115 if (!opregion || !opregion->asle_ext) 1116 return NULL; 1117 1118 edid = opregion->asle_ext->bddc; 1119 1120 /* Validity corresponds to number of 128-byte blocks */ 1121 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128; 1122 if (!len || mem_is_zero(edid, len)) 1123 return NULL; 1124 1125 drm_edid = drm_edid_alloc(edid, len); 1126 1127 if (!drm_edid_valid(drm_edid)) { 1128 drm_dbg_kms(display->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n"); 1129 drm_edid_free(drm_edid); 1130 drm_edid = NULL; 1131 } 1132 1133 return drm_edid; 1134 } 1135 1136 bool intel_opregion_vbt_present(struct intel_display *display) 1137 { 1138 struct intel_opregion *opregion = display->opregion; 1139 1140 if (!opregion || !opregion->vbt) 1141 return false; 1142 1143 return true; 1144 } 1145 1146 const void *intel_opregion_get_vbt(struct intel_display *display, size_t *size) 1147 { 1148 struct intel_opregion *opregion = display->opregion; 1149 1150 if (!opregion || !opregion->vbt) 1151 return NULL; 1152 1153 if (size) 1154 *size = opregion->vbt_size; 1155 1156 return kmemdup(opregion->vbt, opregion->vbt_size, GFP_KERNEL); 1157 } 1158 1159 bool intel_opregion_headless_sku(struct intel_display *display) 1160 { 1161 struct intel_opregion *opregion = display->opregion; 1162 struct opregion_header *header; 1163 1164 if (!opregion) 1165 return false; 1166 1167 header = opregion->header; 1168 1169 if (!header || header->over.major < 2 || 1170 (header->over.major == 2 && header->over.minor < 3)) 1171 return false; 1172 1173 return opregion->header->pcon & PCON_HEADLESS_SKU; 1174 } 1175 1176 void intel_opregion_register(struct intel_display *display) 1177 { 1178 struct intel_opregion *opregion = display->opregion; 1179 1180 if (!opregion) 1181 return; 1182 1183 if (opregion->acpi) { 1184 opregion->acpi_notifier.notifier_call = 1185 intel_opregion_video_event; 1186 register_acpi_notifier(&opregion->acpi_notifier); 1187 } 1188 1189 intel_opregion_resume(display); 1190 } 1191 1192 static void intel_opregion_resume_display(struct intel_display *display) 1193 { 1194 struct intel_opregion *opregion = display->opregion; 1195 1196 if (opregion->acpi) { 1197 intel_didl_outputs(display); 1198 intel_setup_cadls(display); 1199 1200 /* 1201 * Notify BIOS we are ready to handle ACPI video ext notifs. 1202 * Right now, all the events are handled by the ACPI video 1203 * module. We don't actually need to do anything with them. 1204 */ 1205 opregion->acpi->csts = 0; 1206 opregion->acpi->drdy = 1; 1207 } 1208 1209 if (opregion->asle) { 1210 opregion->asle->tche = ASLE_TCHE_BLC_EN; 1211 opregion->asle->ardy = ASLE_ARDY_READY; 1212 } 1213 1214 /* Some platforms abuse the _DSM to enable MUX */ 1215 intel_dsm_get_bios_data_funcs_supported(display); 1216 } 1217 1218 void intel_opregion_resume(struct intel_display *display) 1219 { 1220 struct intel_opregion *opregion = display->opregion; 1221 1222 if (!opregion) 1223 return; 1224 1225 if (HAS_DISPLAY(display)) 1226 intel_opregion_resume_display(display); 1227 1228 intel_opregion_notify_adapter(display, PCI_D0); 1229 } 1230 1231 static void intel_opregion_suspend_display(struct intel_display *display) 1232 { 1233 struct intel_opregion *opregion = display->opregion; 1234 1235 if (opregion->asle) 1236 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 1237 1238 cancel_work_sync(&opregion->asle_work); 1239 1240 if (opregion->acpi) 1241 opregion->acpi->drdy = 0; 1242 } 1243 1244 void intel_opregion_suspend(struct intel_display *display, pci_power_t state) 1245 { 1246 struct intel_opregion *opregion = display->opregion; 1247 1248 if (!opregion) 1249 return; 1250 1251 intel_opregion_notify_adapter(display, state); 1252 1253 if (HAS_DISPLAY(display)) 1254 intel_opregion_suspend_display(display); 1255 } 1256 1257 void intel_opregion_unregister(struct intel_display *display) 1258 { 1259 struct intel_opregion *opregion = display->opregion; 1260 1261 intel_opregion_suspend(display, PCI_D1); 1262 1263 if (!opregion) 1264 return; 1265 1266 if (opregion->acpi_notifier.notifier_call) { 1267 unregister_acpi_notifier(&opregion->acpi_notifier); 1268 opregion->acpi_notifier.notifier_call = NULL; 1269 } 1270 } 1271 1272 void intel_opregion_cleanup(struct intel_display *display) 1273 { 1274 struct intel_opregion *opregion = display->opregion; 1275 1276 if (!opregion) 1277 return; 1278 1279 memunmap(opregion->header); 1280 if (opregion->rvda) 1281 memunmap(opregion->rvda); 1282 kfree(opregion); 1283 display->opregion = NULL; 1284 } 1285 1286 static int intel_opregion_show(struct seq_file *m, void *unused) 1287 { 1288 struct intel_display *display = m->private; 1289 struct intel_opregion *opregion = display->opregion; 1290 1291 if (opregion) 1292 seq_write(m, opregion->header, OPREGION_SIZE); 1293 1294 return 0; 1295 } 1296 1297 DEFINE_SHOW_ATTRIBUTE(intel_opregion); 1298 1299 void intel_opregion_debugfs_register(struct intel_display *display) 1300 { 1301 struct drm_minor *minor = display->drm->primary; 1302 1303 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root, 1304 display, &intel_opregion_fops); 1305 } 1306