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