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/dmi.h> 30 #include <acpi/video.h> 31 32 #include <drm/drm_edid.h> 33 34 #include "i915_drv.h" 35 #include "intel_acpi.h" 36 #include "intel_backlight.h" 37 #include "intel_display_types.h" 38 #include "intel_opregion.h" 39 #include "intel_pci_config.h" 40 41 #define OPREGION_HEADER_OFFSET 0 42 #define OPREGION_ACPI_OFFSET 0x100 43 #define ACPI_CLID 0x01ac /* current lid state indicator */ 44 #define ACPI_CDCK 0x01b0 /* current docking state indicator */ 45 #define OPREGION_SWSCI_OFFSET 0x200 46 #define OPREGION_ASLE_OFFSET 0x300 47 #define OPREGION_VBT_OFFSET 0x400 48 #define OPREGION_ASLE_EXT_OFFSET 0x1C00 49 50 #define OPREGION_SIGNATURE "IntelGraphicsMem" 51 #define MBOX_ACPI BIT(0) /* Mailbox #1 */ 52 #define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */ 53 #define MBOX_ASLE BIT(2) /* Mailbox #3 */ 54 #define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */ 55 #define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */ 56 57 #define PCON_HEADLESS_SKU BIT(13) 58 59 struct opregion_header { 60 u8 signature[16]; 61 u32 size; 62 struct { 63 u8 rsvd; 64 u8 revision; 65 u8 minor; 66 u8 major; 67 } __packed over; 68 u8 bios_ver[32]; 69 u8 vbios_ver[16]; 70 u8 driver_ver[16]; 71 u32 mboxes; 72 u32 driver_model; 73 u32 pcon; 74 u8 dver[32]; 75 u8 rsvd[124]; 76 } __packed; 77 78 /* OpRegion mailbox #1: public ACPI methods */ 79 struct opregion_acpi { 80 u32 drdy; /* driver readiness */ 81 u32 csts; /* notification status */ 82 u32 cevt; /* current event */ 83 u8 rsvd1[20]; 84 u32 didl[8]; /* supported display devices ID list */ 85 u32 cpdl[8]; /* currently presented display list */ 86 u32 cadl[8]; /* currently active display list */ 87 u32 nadl[8]; /* next active devices list */ 88 u32 aslp; /* ASL sleep time-out */ 89 u32 tidx; /* toggle table index */ 90 u32 chpd; /* current hotplug enable indicator */ 91 u32 clid; /* current lid state*/ 92 u32 cdck; /* current docking state */ 93 u32 sxsw; /* Sx state resume */ 94 u32 evts; /* ASL supported events */ 95 u32 cnot; /* current OS notification */ 96 u32 nrdy; /* driver status */ 97 u32 did2[7]; /* extended supported display devices ID list */ 98 u32 cpd2[7]; /* extended attached display devices list */ 99 u8 rsvd2[4]; 100 } __packed; 101 102 /* OpRegion mailbox #2: SWSCI */ 103 struct opregion_swsci { 104 u32 scic; /* SWSCI command|status|data */ 105 u32 parm; /* command parameters */ 106 u32 dslp; /* driver sleep time-out */ 107 u8 rsvd[244]; 108 } __packed; 109 110 /* OpRegion mailbox #3: ASLE */ 111 struct opregion_asle { 112 u32 ardy; /* driver readiness */ 113 u32 aslc; /* ASLE interrupt command */ 114 u32 tche; /* technology enabled indicator */ 115 u32 alsi; /* current ALS illuminance reading */ 116 u32 bclp; /* backlight brightness to set */ 117 u32 pfit; /* panel fitting state */ 118 u32 cblv; /* current brightness level */ 119 u16 bclm[20]; /* backlight level duty cycle mapping table */ 120 u32 cpfm; /* current panel fitting mode */ 121 u32 epfm; /* enabled panel fitting modes */ 122 u8 plut[74]; /* panel LUT and identifier */ 123 u32 pfmb; /* PWM freq and min brightness */ 124 u32 cddv; /* color correction default values */ 125 u32 pcft; /* power conservation features */ 126 u32 srot; /* supported rotation angles */ 127 u32 iuer; /* IUER events */ 128 u64 fdss; 129 u32 fdsp; 130 u32 stat; 131 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+) 132 * address of raw VBT data. */ 133 u32 rvds; /* Size of raw vbt data */ 134 u8 rsvd[58]; 135 } __packed; 136 137 /* OpRegion mailbox #5: ASLE ext */ 138 struct opregion_asle_ext { 139 u32 phed; /* Panel Header */ 140 u8 bddc[256]; /* Panel EDID */ 141 u8 rsvd[764]; 142 } __packed; 143 144 /* Driver readiness indicator */ 145 #define ASLE_ARDY_READY (1 << 0) 146 #define ASLE_ARDY_NOT_READY (0 << 0) 147 148 /* ASLE Interrupt Command (ASLC) bits */ 149 #define ASLC_SET_ALS_ILLUM (1 << 0) 150 #define ASLC_SET_BACKLIGHT (1 << 1) 151 #define ASLC_SET_PFIT (1 << 2) 152 #define ASLC_SET_PWM_FREQ (1 << 3) 153 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4) 154 #define ASLC_BUTTON_ARRAY (1 << 5) 155 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6) 156 #define ASLC_DOCKING_INDICATOR (1 << 7) 157 #define ASLC_ISCT_STATE_CHANGE (1 << 8) 158 #define ASLC_REQ_MSK 0x1ff 159 /* response bits */ 160 #define ASLC_ALS_ILLUM_FAILED (1 << 10) 161 #define ASLC_BACKLIGHT_FAILED (1 << 12) 162 #define ASLC_PFIT_FAILED (1 << 14) 163 #define ASLC_PWM_FREQ_FAILED (1 << 16) 164 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18) 165 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20) 166 #define ASLC_CONVERTIBLE_FAILED (1 << 22) 167 #define ASLC_DOCKING_FAILED (1 << 24) 168 #define ASLC_ISCT_STATE_FAILED (1 << 26) 169 170 /* Technology enabled indicator */ 171 #define ASLE_TCHE_ALS_EN (1 << 0) 172 #define ASLE_TCHE_BLC_EN (1 << 1) 173 #define ASLE_TCHE_PFIT_EN (1 << 2) 174 #define ASLE_TCHE_PFMB_EN (1 << 3) 175 176 /* ASLE backlight brightness to set */ 177 #define ASLE_BCLP_VALID (1<<31) 178 #define ASLE_BCLP_MSK (~(1<<31)) 179 180 /* ASLE panel fitting request */ 181 #define ASLE_PFIT_VALID (1<<31) 182 #define ASLE_PFIT_CENTER (1<<0) 183 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 184 #define ASLE_PFIT_STRETCH_GFX (1<<2) 185 186 /* PWM frequency and minimum brightness */ 187 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 188 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 189 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 190 #define ASLE_PFMB_PWM_VALID (1<<31) 191 192 #define ASLE_CBLV_VALID (1<<31) 193 194 /* IUER */ 195 #define ASLE_IUER_DOCKING (1 << 7) 196 #define ASLE_IUER_CONVERTIBLE (1 << 6) 197 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4) 198 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3) 199 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2) 200 #define ASLE_IUER_WINDOWS_BTN (1 << 1) 201 #define ASLE_IUER_POWER_BTN (1 << 0) 202 203 #define ASLE_PHED_EDID_VALID_MASK 0x3 204 205 /* Software System Control Interrupt (SWSCI) */ 206 #define SWSCI_SCIC_INDICATOR (1 << 0) 207 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 208 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1) 209 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8 210 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8) 211 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8 212 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8) 213 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5 214 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5) 215 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1 216 217 #define SWSCI_FUNCTION_CODE(main, sub) \ 218 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \ 219 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT) 220 221 /* SWSCI: Get BIOS Data (GBDA) */ 222 #define SWSCI_GBDA 4 223 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0) 224 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1) 225 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4) 226 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5) 227 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6) 228 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7) 229 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10) 230 231 /* SWSCI: System BIOS Callbacks (SBCB) */ 232 #define SWSCI_SBCB 6 233 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0) 234 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1) 235 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3) 236 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4) 237 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5) 238 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6) 239 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7) 240 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8) 241 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9) 242 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10) 243 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11) 244 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16) 245 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17) 246 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18) 247 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19) 248 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21) 249 250 #define MAX_DSLP 1500 251 252 #define OPREGION_SIZE (8 * 1024) 253 254 struct intel_opregion { 255 struct drm_i915_private *i915; 256 257 struct opregion_header *header; 258 struct opregion_acpi *acpi; 259 struct opregion_swsci *swsci; 260 u32 swsci_gbda_sub_functions; 261 u32 swsci_sbcb_sub_functions; 262 struct opregion_asle *asle; 263 struct opregion_asle_ext *asle_ext; 264 void *rvda; 265 const void *vbt; 266 u32 vbt_size; 267 struct work_struct asle_work; 268 struct notifier_block acpi_notifier; 269 }; 270 271 static int check_swsci_function(struct drm_i915_private *i915, u32 function) 272 { 273 struct intel_opregion *opregion = i915->display.opregion; 274 struct opregion_swsci *swsci; 275 u32 main_function, sub_function; 276 277 if (!opregion) 278 return -ENODEV; 279 280 swsci = opregion->swsci; 281 if (!swsci) 282 return -ENODEV; 283 284 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> 285 SWSCI_SCIC_MAIN_FUNCTION_SHIFT; 286 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> 287 SWSCI_SCIC_SUB_FUNCTION_SHIFT; 288 289 /* Check if we can call the function. See swsci_setup for details. */ 290 if (main_function == SWSCI_SBCB) { 291 if ((opregion->swsci_sbcb_sub_functions & 292 (1 << sub_function)) == 0) 293 return -EINVAL; 294 } else if (main_function == SWSCI_GBDA) { 295 if ((opregion->swsci_gbda_sub_functions & 296 (1 << sub_function)) == 0) 297 return -EINVAL; 298 } 299 300 return 0; 301 } 302 303 static int swsci(struct drm_i915_private *dev_priv, 304 u32 function, u32 parm, u32 *parm_out) 305 { 306 struct opregion_swsci *swsci; 307 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 308 u32 scic, dslp; 309 u16 swsci_val; 310 int ret; 311 312 ret = check_swsci_function(dev_priv, function); 313 if (ret) 314 return ret; 315 316 swsci = dev_priv->display.opregion->swsci; 317 318 /* Driver sleep timeout in ms. */ 319 dslp = swsci->dslp; 320 if (!dslp) { 321 /* The spec says 2ms should be the default, but it's too small 322 * for some machines. */ 323 dslp = 50; 324 } else if (dslp > MAX_DSLP) { 325 /* Hey bios, trust must be earned. */ 326 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, " 327 "using %u ms instead\n", dslp, MAX_DSLP); 328 dslp = MAX_DSLP; 329 } 330 331 /* The spec tells us to do this, but we are the only user... */ 332 scic = swsci->scic; 333 if (scic & SWSCI_SCIC_INDICATOR) { 334 drm_dbg(&dev_priv->drm, "SWSCI request already in progress\n"); 335 return -EBUSY; 336 } 337 338 scic = function | SWSCI_SCIC_INDICATOR; 339 340 swsci->parm = parm; 341 swsci->scic = scic; 342 343 /* Ensure SCI event is selected and event trigger is cleared. */ 344 pci_read_config_word(pdev, SWSCI, &swsci_val); 345 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) { 346 swsci_val |= SWSCI_SCISEL; 347 swsci_val &= ~SWSCI_GSSCIE; 348 pci_write_config_word(pdev, SWSCI, swsci_val); 349 } 350 351 /* Use event trigger to tell bios to check the mail. */ 352 swsci_val |= SWSCI_GSSCIE; 353 pci_write_config_word(pdev, SWSCI, swsci_val); 354 355 /* Poll for the result. */ 356 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0) 357 if (wait_for(C, dslp)) { 358 drm_dbg(&dev_priv->drm, "SWSCI request timed out\n"); 359 return -ETIMEDOUT; 360 } 361 362 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >> 363 SWSCI_SCIC_EXIT_STATUS_SHIFT; 364 365 /* Note: scic == 0 is an error! */ 366 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) { 367 drm_dbg(&dev_priv->drm, "SWSCI request error %u\n", scic); 368 return -EIO; 369 } 370 371 if (parm_out) 372 *parm_out = swsci->parm; 373 374 return 0; 375 376 #undef C 377 } 378 379 #define DISPLAY_TYPE_CRT 0 380 #define DISPLAY_TYPE_TV 1 381 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2 382 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3 383 384 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, 385 bool enable) 386 { 387 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev); 388 u32 parm = 0; 389 u32 type = 0; 390 u32 port; 391 int ret; 392 393 /* don't care about old stuff for now */ 394 if (!HAS_DDI(dev_priv)) 395 return 0; 396 397 /* Avoid port out of bounds checks if SWSCI isn't there. */ 398 ret = check_swsci_function(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE); 399 if (ret) 400 return ret; 401 402 if (intel_encoder->type == INTEL_OUTPUT_DSI) 403 port = 0; 404 else 405 port = intel_encoder->port; 406 407 if (port == PORT_E) { 408 port = 0; 409 } else { 410 parm |= 1 << port; 411 port++; 412 } 413 414 /* 415 * The port numbering and mapping here is bizarre. The now-obsolete 416 * swsci spec supports ports numbered [0..4]. Port E is handled as a 417 * special case, but port F and beyond are not. The functionality is 418 * supposed to be obsolete for new platforms. Just bail out if the port 419 * number is out of bounds after mapping. 420 */ 421 if (port > 4) { 422 drm_dbg_kms(&dev_priv->drm, 423 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n", 424 intel_encoder->base.base.id, intel_encoder->base.name, 425 port_name(intel_encoder->port), port); 426 return -EINVAL; 427 } 428 429 if (!enable) 430 parm |= 4 << 8; 431 432 switch (intel_encoder->type) { 433 case INTEL_OUTPUT_ANALOG: 434 type = DISPLAY_TYPE_CRT; 435 break; 436 case INTEL_OUTPUT_DDI: 437 case INTEL_OUTPUT_DP: 438 case INTEL_OUTPUT_HDMI: 439 case INTEL_OUTPUT_DP_MST: 440 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; 441 break; 442 case INTEL_OUTPUT_EDP: 443 case INTEL_OUTPUT_DSI: 444 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; 445 break; 446 default: 447 drm_WARN_ONCE(&dev_priv->drm, 1, 448 "unsupported intel_encoder type %d\n", 449 intel_encoder->type); 450 return -EINVAL; 451 } 452 453 parm |= type << (16 + port * 3); 454 455 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); 456 } 457 458 static const struct { 459 pci_power_t pci_power_state; 460 u32 parm; 461 } power_state_map[] = { 462 { PCI_D0, 0x00 }, 463 { PCI_D1, 0x01 }, 464 { PCI_D2, 0x02 }, 465 { PCI_D3hot, 0x04 }, 466 { PCI_D3cold, 0x04 }, 467 }; 468 469 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv, 470 pci_power_t state) 471 { 472 int i; 473 474 if (!HAS_DDI(dev_priv)) 475 return 0; 476 477 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { 478 if (state == power_state_map[i].pci_power_state) 479 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE, 480 power_state_map[i].parm, NULL); 481 } 482 483 return -EINVAL; 484 } 485 486 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp) 487 { 488 struct intel_connector *connector; 489 struct drm_connector_list_iter conn_iter; 490 struct opregion_asle *asle = dev_priv->display.opregion->asle; 491 492 drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp); 493 494 if (acpi_video_get_backlight_type() == acpi_backlight_native) { 495 drm_dbg_kms(&dev_priv->drm, 496 "opregion backlight request ignored\n"); 497 return 0; 498 } 499 500 if (!(bclp & ASLE_BCLP_VALID)) 501 return ASLC_BACKLIGHT_FAILED; 502 503 bclp &= ASLE_BCLP_MSK; 504 if (bclp > 255) 505 return ASLC_BACKLIGHT_FAILED; 506 507 drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex, NULL); 508 509 /* 510 * Update backlight on all connectors that support backlight (usually 511 * only one). 512 */ 513 drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n", 514 bclp); 515 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 516 for_each_intel_connector_iter(connector, &conn_iter) 517 intel_backlight_set_acpi(connector->base.state, bclp, 255); 518 drm_connector_list_iter_end(&conn_iter); 519 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID; 520 521 drm_modeset_unlock(&dev_priv->drm.mode_config.connection_mutex); 522 523 524 return 0; 525 } 526 527 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi) 528 { 529 /* alsi is the current ALS reading in lux. 0 indicates below sensor 530 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 531 drm_dbg(&dev_priv->drm, "Illum is not supported\n"); 532 return ASLC_ALS_ILLUM_FAILED; 533 } 534 535 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb) 536 { 537 drm_dbg(&dev_priv->drm, "PWM freq is not supported\n"); 538 return ASLC_PWM_FREQ_FAILED; 539 } 540 541 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit) 542 { 543 /* Panel fitting is currently controlled by the X code, so this is a 544 noop until modesetting support works fully */ 545 drm_dbg(&dev_priv->drm, "Pfit is not supported\n"); 546 return ASLC_PFIT_FAILED; 547 } 548 549 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot) 550 { 551 drm_dbg(&dev_priv->drm, "SROT is not supported\n"); 552 return ASLC_ROTATION_ANGLES_FAILED; 553 } 554 555 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer) 556 { 557 if (!iuer) 558 drm_dbg(&dev_priv->drm, 559 "Button array event is not supported (nothing)\n"); 560 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 561 drm_dbg(&dev_priv->drm, 562 "Button array event is not supported (rotation lock)\n"); 563 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 564 drm_dbg(&dev_priv->drm, 565 "Button array event is not supported (volume down)\n"); 566 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 567 drm_dbg(&dev_priv->drm, 568 "Button array event is not supported (volume up)\n"); 569 if (iuer & ASLE_IUER_WINDOWS_BTN) 570 drm_dbg(&dev_priv->drm, 571 "Button array event is not supported (windows)\n"); 572 if (iuer & ASLE_IUER_POWER_BTN) 573 drm_dbg(&dev_priv->drm, 574 "Button array event is not supported (power)\n"); 575 576 return ASLC_BUTTON_ARRAY_FAILED; 577 } 578 579 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer) 580 { 581 if (iuer & ASLE_IUER_CONVERTIBLE) 582 drm_dbg(&dev_priv->drm, 583 "Convertible is not supported (clamshell)\n"); 584 else 585 drm_dbg(&dev_priv->drm, 586 "Convertible is not supported (slate)\n"); 587 588 return ASLC_CONVERTIBLE_FAILED; 589 } 590 591 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer) 592 { 593 if (iuer & ASLE_IUER_DOCKING) 594 drm_dbg(&dev_priv->drm, "Docking is not supported (docked)\n"); 595 else 596 drm_dbg(&dev_priv->drm, 597 "Docking is not supported (undocked)\n"); 598 599 return ASLC_DOCKING_FAILED; 600 } 601 602 static u32 asle_isct_state(struct drm_i915_private *dev_priv) 603 { 604 drm_dbg(&dev_priv->drm, "ISCT is not supported\n"); 605 return ASLC_ISCT_STATE_FAILED; 606 } 607 608 static void asle_work(struct work_struct *work) 609 { 610 struct intel_opregion *opregion = 611 container_of(work, struct intel_opregion, asle_work); 612 struct drm_i915_private *dev_priv = opregion->i915; 613 struct opregion_asle *asle = opregion->asle; 614 u32 aslc_stat = 0; 615 u32 aslc_req; 616 617 if (!asle) 618 return; 619 620 aslc_req = asle->aslc; 621 622 if (!(aslc_req & ASLC_REQ_MSK)) { 623 drm_dbg(&dev_priv->drm, 624 "No request on ASLC interrupt 0x%08x\n", aslc_req); 625 return; 626 } 627 628 if (aslc_req & ASLC_SET_ALS_ILLUM) 629 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi); 630 631 if (aslc_req & ASLC_SET_BACKLIGHT) 632 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp); 633 634 if (aslc_req & ASLC_SET_PFIT) 635 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit); 636 637 if (aslc_req & ASLC_SET_PWM_FREQ) 638 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb); 639 640 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 641 aslc_stat |= asle_set_supported_rotation_angles(dev_priv, 642 asle->srot); 643 644 if (aslc_req & ASLC_BUTTON_ARRAY) 645 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer); 646 647 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 648 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer); 649 650 if (aslc_req & ASLC_DOCKING_INDICATOR) 651 aslc_stat |= asle_set_docking(dev_priv, asle->iuer); 652 653 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 654 aslc_stat |= asle_isct_state(dev_priv); 655 656 asle->aslc = aslc_stat; 657 } 658 659 bool intel_opregion_asle_present(struct drm_i915_private *i915) 660 { 661 return i915->display.opregion && i915->display.opregion->asle; 662 } 663 664 void intel_opregion_asle_intr(struct drm_i915_private *i915) 665 { 666 struct intel_opregion *opregion = i915->display.opregion; 667 668 if (opregion && opregion->asle) 669 queue_work(i915->unordered_wq, &opregion->asle_work); 670 } 671 672 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 673 #define ACPI_EV_LID (1<<1) 674 #define ACPI_EV_DOCK (1<<2) 675 676 /* 677 * The only video events relevant to opregion are 0x80. These indicate either a 678 * docking event, lid switch or display switch request. In Linux, these are 679 * handled by the dock, button and video drivers. 680 */ 681 static int intel_opregion_video_event(struct notifier_block *nb, 682 unsigned long val, void *data) 683 { 684 struct intel_opregion *opregion = container_of(nb, struct intel_opregion, 685 acpi_notifier); 686 struct acpi_bus_event *event = data; 687 struct opregion_acpi *acpi; 688 int ret = NOTIFY_OK; 689 690 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 691 return NOTIFY_DONE; 692 693 acpi = opregion->acpi; 694 695 if (event->type == 0x80 && ((acpi->cevt & 1) == 0)) 696 ret = NOTIFY_BAD; 697 698 acpi->csts = 0; 699 700 return ret; 701 } 702 703 /* 704 * Initialise the DIDL field in opregion. This passes a list of devices to 705 * the firmware. Values are defined by section B.4.2 of the ACPI specification 706 * (version 3) 707 */ 708 709 static void set_did(struct intel_opregion *opregion, int i, u32 val) 710 { 711 if (i < ARRAY_SIZE(opregion->acpi->didl)) { 712 opregion->acpi->didl[i] = val; 713 } else { 714 i -= ARRAY_SIZE(opregion->acpi->didl); 715 716 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) 717 return; 718 719 opregion->acpi->did2[i] = val; 720 } 721 } 722 723 static void intel_didl_outputs(struct drm_i915_private *dev_priv) 724 { 725 struct intel_opregion *opregion = dev_priv->display.opregion; 726 struct intel_connector *connector; 727 struct drm_connector_list_iter conn_iter; 728 int i = 0, max_outputs; 729 730 /* 731 * In theory, did2, the extended didl, gets added at opregion version 732 * 3.0. In practice, however, we're supposed to set it for earlier 733 * versions as well, since a BIOS that doesn't understand did2 should 734 * not look at it anyway. Use a variable so we can tweak this if a need 735 * arises later. 736 */ 737 max_outputs = ARRAY_SIZE(opregion->acpi->didl) + 738 ARRAY_SIZE(opregion->acpi->did2); 739 740 intel_acpi_device_id_update(dev_priv); 741 742 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 743 for_each_intel_connector_iter(connector, &conn_iter) { 744 if (i < max_outputs) 745 set_did(opregion, i, connector->acpi_device_id); 746 i++; 747 } 748 drm_connector_list_iter_end(&conn_iter); 749 750 drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i); 751 752 if (i > max_outputs) 753 drm_err(&dev_priv->drm, 754 "More than %d outputs in connector list\n", 755 max_outputs); 756 757 /* If fewer than max outputs, the list must be null terminated */ 758 if (i < max_outputs) 759 set_did(opregion, i, 0); 760 } 761 762 static void intel_setup_cadls(struct drm_i915_private *dev_priv) 763 { 764 struct intel_opregion *opregion = dev_priv->display.opregion; 765 struct intel_connector *connector; 766 struct drm_connector_list_iter conn_iter; 767 int i = 0; 768 769 /* 770 * Initialize the CADL field from the connector device ids. This is 771 * essentially the same as copying from the DIDL. Technically, this is 772 * not always correct as display outputs may exist, but not active. This 773 * initialization is necessary for some Clevo laptops that check this 774 * field before processing the brightness and display switching hotkeys. 775 * 776 * Note that internal panels should be at the front of the connector 777 * list already, ensuring they're not left out. 778 */ 779 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 780 for_each_intel_connector_iter(connector, &conn_iter) { 781 if (i >= ARRAY_SIZE(opregion->acpi->cadl)) 782 break; 783 opregion->acpi->cadl[i++] = connector->acpi_device_id; 784 } 785 drm_connector_list_iter_end(&conn_iter); 786 787 /* If fewer than 8 active devices, the list must be null terminated */ 788 if (i < ARRAY_SIZE(opregion->acpi->cadl)) 789 opregion->acpi->cadl[i] = 0; 790 } 791 792 static void swsci_setup(struct drm_i915_private *dev_priv) 793 { 794 struct intel_opregion *opregion = dev_priv->display.opregion; 795 bool requested_callbacks = false; 796 u32 tmp; 797 798 /* Sub-function code 0 is okay, let's allow them. */ 799 opregion->swsci_gbda_sub_functions = 1; 800 opregion->swsci_sbcb_sub_functions = 1; 801 802 /* We use GBDA to ask for supported GBDA calls. */ 803 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 804 /* make the bits match the sub-function codes */ 805 tmp <<= 1; 806 opregion->swsci_gbda_sub_functions |= tmp; 807 } 808 809 /* 810 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 811 * must not call interfaces that are not specifically requested by the 812 * bios. 813 */ 814 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 815 /* here, the bits already match sub-function codes */ 816 opregion->swsci_sbcb_sub_functions |= tmp; 817 requested_callbacks = true; 818 } 819 820 /* 821 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 822 * the callback is _requested_. But we still can't call interfaces that 823 * are not requested. 824 */ 825 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 826 /* make the bits match the sub-function codes */ 827 u32 low = tmp & 0x7ff; 828 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 829 tmp = (high << 4) | (low << 1) | 1; 830 831 /* best guess what to do with supported wrt requested */ 832 if (requested_callbacks) { 833 u32 req = opregion->swsci_sbcb_sub_functions; 834 if ((req & tmp) != req) 835 drm_dbg(&dev_priv->drm, 836 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", 837 req, tmp); 838 /* XXX: for now, trust the requested callbacks */ 839 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 840 } else { 841 opregion->swsci_sbcb_sub_functions |= tmp; 842 } 843 } 844 845 drm_dbg(&dev_priv->drm, 846 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 847 opregion->swsci_gbda_sub_functions, 848 opregion->swsci_sbcb_sub_functions); 849 } 850 851 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 852 { 853 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 854 "VBIOS ROM for %s\n", id->ident); 855 return 1; 856 } 857 858 static const struct dmi_system_id intel_no_opregion_vbt[] = { 859 { 860 .callback = intel_no_opregion_vbt_callback, 861 .ident = "ThinkCentre A57", 862 .matches = { 863 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 864 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 865 }, 866 }, 867 { } 868 }; 869 870 int intel_opregion_setup(struct drm_i915_private *dev_priv) 871 { 872 struct intel_opregion *opregion; 873 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 874 u32 asls, mboxes; 875 char buf[sizeof(OPREGION_SIGNATURE)]; 876 int err = 0; 877 void *base; 878 const void *vbt; 879 u32 vbt_size; 880 881 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); 882 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); 883 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); 884 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 885 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400); 886 887 pci_read_config_dword(pdev, ASLS, &asls); 888 drm_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n", 889 asls); 890 if (asls == 0) { 891 drm_dbg(&dev_priv->drm, "ACPI OpRegion not supported!\n"); 892 return -ENOTSUPP; 893 } 894 895 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL); 896 if (!opregion) 897 return -ENOMEM; 898 899 opregion->i915 = dev_priv; 900 dev_priv->display.opregion = opregion; 901 902 INIT_WORK(&opregion->asle_work, asle_work); 903 904 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB); 905 if (!base) { 906 err = -ENOMEM; 907 goto err_memremap; 908 } 909 910 memcpy(buf, base, sizeof(buf)); 911 912 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 913 drm_dbg(&dev_priv->drm, "opregion signature mismatch\n"); 914 err = -EINVAL; 915 goto err_out; 916 } 917 opregion->header = base; 918 919 drm_dbg(&dev_priv->drm, "ACPI OpRegion version %u.%u.%u\n", 920 opregion->header->over.major, 921 opregion->header->over.minor, 922 opregion->header->over.revision); 923 924 mboxes = opregion->header->mboxes; 925 if (mboxes & MBOX_ACPI) { 926 drm_dbg(&dev_priv->drm, "Public ACPI methods supported\n"); 927 opregion->acpi = base + OPREGION_ACPI_OFFSET; 928 /* 929 * Indicate we handle monitor hotplug events ourselves so we do 930 * not need ACPI notifications for them. Disabling these avoids 931 * triggering the AML code doing the notifation, which may be 932 * broken as Windows also seems to disable these. 933 */ 934 opregion->acpi->chpd = 1; 935 } 936 937 if (mboxes & MBOX_SWSCI) { 938 u8 major = opregion->header->over.major; 939 940 if (major >= 3) { 941 drm_err(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n"); 942 } else { 943 if (major >= 2) 944 drm_dbg(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v2.x\n"); 945 drm_dbg(&dev_priv->drm, "SWSCI supported\n"); 946 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 947 swsci_setup(dev_priv); 948 } 949 } 950 951 if (mboxes & MBOX_ASLE) { 952 drm_dbg(&dev_priv->drm, "ASLE supported\n"); 953 opregion->asle = base + OPREGION_ASLE_OFFSET; 954 955 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 956 } 957 958 if (mboxes & MBOX_ASLE_EXT) { 959 drm_dbg(&dev_priv->drm, "ASLE extension supported\n"); 960 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET; 961 } 962 963 if (mboxes & MBOX_BACKLIGHT) { 964 drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n"); 965 } 966 967 if (dmi_check_system(intel_no_opregion_vbt)) 968 goto out; 969 970 if (opregion->header->over.major >= 2 && opregion->asle && 971 opregion->asle->rvda && opregion->asle->rvds) { 972 resource_size_t rvda = opregion->asle->rvda; 973 974 /* 975 * opregion 2.0: rvda is the physical VBT address. 976 * 977 * opregion 2.1+: rvda is unsigned, relative offset from 978 * opregion base, and should never point within opregion. 979 */ 980 if (opregion->header->over.major > 2 || 981 opregion->header->over.minor >= 1) { 982 drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE); 983 984 rvda += asls; 985 } 986 987 opregion->rvda = memremap(rvda, opregion->asle->rvds, 988 MEMREMAP_WB); 989 990 vbt = opregion->rvda; 991 vbt_size = opregion->asle->rvds; 992 if (intel_bios_is_valid_vbt(dev_priv, vbt, vbt_size)) { 993 drm_dbg_kms(&dev_priv->drm, 994 "Found valid VBT in ACPI OpRegion (RVDA)\n"); 995 opregion->vbt = vbt; 996 opregion->vbt_size = vbt_size; 997 goto out; 998 } else { 999 drm_dbg_kms(&dev_priv->drm, 1000 "Invalid VBT in ACPI OpRegion (RVDA)\n"); 1001 memunmap(opregion->rvda); 1002 opregion->rvda = NULL; 1003 } 1004 } 1005 1006 vbt = base + OPREGION_VBT_OFFSET; 1007 /* 1008 * The VBT specification says that if the ASLE ext mailbox is not used 1009 * its area is reserved, but on some CHT boards the VBT extends into the 1010 * ASLE ext area. Allow this even though it is against the spec, so we 1011 * do not end up rejecting the VBT on those boards (and end up not 1012 * finding the LCD panel because of this). 1013 */ 1014 vbt_size = (mboxes & MBOX_ASLE_EXT) ? 1015 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; 1016 vbt_size -= OPREGION_VBT_OFFSET; 1017 if (intel_bios_is_valid_vbt(dev_priv, vbt, vbt_size)) { 1018 drm_dbg_kms(&dev_priv->drm, 1019 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); 1020 opregion->vbt = vbt; 1021 opregion->vbt_size = vbt_size; 1022 } else { 1023 drm_dbg_kms(&dev_priv->drm, 1024 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); 1025 } 1026 1027 out: 1028 return 0; 1029 1030 err_out: 1031 memunmap(base); 1032 err_memremap: 1033 kfree(opregion); 1034 dev_priv->display.opregion = NULL; 1035 1036 return err; 1037 } 1038 1039 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id) 1040 { 1041 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident); 1042 return 1; 1043 } 1044 1045 static const struct dmi_system_id intel_use_opregion_panel_type[] = { 1046 { 1047 .callback = intel_use_opregion_panel_type_callback, 1048 .ident = "Conrac GmbH IX45GM2", 1049 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"), 1050 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"), 1051 }, 1052 }, 1053 { } 1054 }; 1055 1056 int 1057 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv) 1058 { 1059 u32 panel_details; 1060 int ret; 1061 1062 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details); 1063 if (ret) 1064 return ret; 1065 1066 ret = (panel_details >> 8) & 0xff; 1067 if (ret > 0x10) { 1068 drm_dbg_kms(&dev_priv->drm, 1069 "Invalid OpRegion panel type 0x%x\n", ret); 1070 return -EINVAL; 1071 } 1072 1073 /* fall back to VBT panel type? */ 1074 if (ret == 0x0) { 1075 drm_dbg_kms(&dev_priv->drm, "No panel type in OpRegion\n"); 1076 return -ENODEV; 1077 } 1078 1079 /* 1080 * So far we know that some machined must use it, others must not use it. 1081 * There doesn't seem to be any way to determine which way to go, except 1082 * via a quirk list :( 1083 */ 1084 if (!dmi_check_system(intel_use_opregion_panel_type)) { 1085 drm_dbg_kms(&dev_priv->drm, 1086 "Ignoring OpRegion panel type (%d)\n", ret - 1); 1087 return -ENODEV; 1088 } 1089 1090 return ret - 1; 1091 } 1092 1093 /** 1094 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5 1095 * @intel_connector: eDP connector 1096 * 1097 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed 1098 * to it. 1099 * 1100 * Returns: 1101 * The EDID in the OpRegion, or NULL if there is none or it's invalid. 1102 * 1103 */ 1104 const struct drm_edid *intel_opregion_get_edid(struct intel_connector *intel_connector) 1105 { 1106 struct drm_connector *connector = &intel_connector->base; 1107 struct drm_i915_private *i915 = to_i915(connector->dev); 1108 struct intel_opregion *opregion = i915->display.opregion; 1109 const struct drm_edid *drm_edid; 1110 const void *edid; 1111 int len; 1112 1113 if (!opregion || !opregion->asle_ext) 1114 return NULL; 1115 1116 edid = opregion->asle_ext->bddc; 1117 1118 /* Validity corresponds to number of 128-byte blocks */ 1119 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128; 1120 if (!len || !memchr_inv(edid, 0, len)) 1121 return NULL; 1122 1123 drm_edid = drm_edid_alloc(edid, len); 1124 1125 if (!drm_edid_valid(drm_edid)) { 1126 drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n"); 1127 drm_edid_free(drm_edid); 1128 drm_edid = NULL; 1129 } 1130 1131 return drm_edid; 1132 } 1133 1134 bool intel_opregion_vbt_present(struct drm_i915_private *i915) 1135 { 1136 struct intel_opregion *opregion = i915->display.opregion; 1137 1138 if (!opregion || !opregion->vbt) 1139 return false; 1140 1141 return true; 1142 } 1143 1144 const void *intel_opregion_get_vbt(struct drm_i915_private *i915, size_t *size) 1145 { 1146 struct intel_opregion *opregion = i915->display.opregion; 1147 1148 if (!opregion || !opregion->vbt) 1149 return NULL; 1150 1151 if (size) 1152 *size = opregion->vbt_size; 1153 1154 return kmemdup(opregion->vbt, opregion->vbt_size, GFP_KERNEL); 1155 } 1156 1157 bool intel_opregion_headless_sku(struct drm_i915_private *i915) 1158 { 1159 struct intel_opregion *opregion = i915->display.opregion; 1160 struct opregion_header *header; 1161 1162 if (!opregion) 1163 return false; 1164 1165 header = opregion->header; 1166 1167 if (!header || header->over.major < 2 || 1168 (header->over.major == 2 && header->over.minor < 3)) 1169 return false; 1170 1171 return opregion->header->pcon & PCON_HEADLESS_SKU; 1172 } 1173 1174 void intel_opregion_register(struct drm_i915_private *i915) 1175 { 1176 struct intel_opregion *opregion = i915->display.opregion; 1177 1178 if (!opregion) 1179 return; 1180 1181 if (opregion->acpi) { 1182 opregion->acpi_notifier.notifier_call = 1183 intel_opregion_video_event; 1184 register_acpi_notifier(&opregion->acpi_notifier); 1185 } 1186 1187 intel_opregion_resume(i915); 1188 } 1189 1190 static void intel_opregion_resume_display(struct drm_i915_private *i915) 1191 { 1192 struct intel_opregion *opregion = i915->display.opregion; 1193 1194 if (opregion->acpi) { 1195 intel_didl_outputs(i915); 1196 intel_setup_cadls(i915); 1197 1198 /* 1199 * Notify BIOS we are ready to handle ACPI video ext notifs. 1200 * Right now, all the events are handled by the ACPI video 1201 * module. We don't actually need to do anything with them. 1202 */ 1203 opregion->acpi->csts = 0; 1204 opregion->acpi->drdy = 1; 1205 } 1206 1207 if (opregion->asle) { 1208 opregion->asle->tche = ASLE_TCHE_BLC_EN; 1209 opregion->asle->ardy = ASLE_ARDY_READY; 1210 } 1211 1212 /* Some platforms abuse the _DSM to enable MUX */ 1213 intel_dsm_get_bios_data_funcs_supported(i915); 1214 } 1215 1216 void intel_opregion_resume(struct drm_i915_private *i915) 1217 { 1218 struct intel_opregion *opregion = i915->display.opregion; 1219 1220 if (!opregion) 1221 return; 1222 1223 if (HAS_DISPLAY(i915)) 1224 intel_opregion_resume_display(i915); 1225 1226 intel_opregion_notify_adapter(i915, PCI_D0); 1227 } 1228 1229 static void intel_opregion_suspend_display(struct drm_i915_private *i915) 1230 { 1231 struct intel_opregion *opregion = i915->display.opregion; 1232 1233 if (opregion->asle) 1234 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 1235 1236 cancel_work_sync(&opregion->asle_work); 1237 1238 if (opregion->acpi) 1239 opregion->acpi->drdy = 0; 1240 } 1241 1242 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state) 1243 { 1244 struct intel_opregion *opregion = i915->display.opregion; 1245 1246 if (!opregion) 1247 return; 1248 1249 intel_opregion_notify_adapter(i915, state); 1250 1251 if (HAS_DISPLAY(i915)) 1252 intel_opregion_suspend_display(i915); 1253 } 1254 1255 void intel_opregion_unregister(struct drm_i915_private *i915) 1256 { 1257 struct intel_opregion *opregion = i915->display.opregion; 1258 1259 intel_opregion_suspend(i915, PCI_D1); 1260 1261 if (!opregion) 1262 return; 1263 1264 if (opregion->acpi_notifier.notifier_call) { 1265 unregister_acpi_notifier(&opregion->acpi_notifier); 1266 opregion->acpi_notifier.notifier_call = NULL; 1267 } 1268 } 1269 1270 void intel_opregion_cleanup(struct drm_i915_private *i915) 1271 { 1272 struct intel_opregion *opregion = i915->display.opregion; 1273 1274 if (!opregion) 1275 return; 1276 1277 memunmap(opregion->header); 1278 if (opregion->rvda) 1279 memunmap(opregion->rvda); 1280 kfree(opregion); 1281 i915->display.opregion = NULL; 1282 } 1283 1284 static int intel_opregion_show(struct seq_file *m, void *unused) 1285 { 1286 struct drm_i915_private *i915 = m->private; 1287 struct intel_opregion *opregion = i915->display.opregion; 1288 1289 if (opregion) 1290 seq_write(m, opregion->header, OPREGION_SIZE); 1291 1292 return 0; 1293 } 1294 1295 DEFINE_SHOW_ATTRIBUTE(intel_opregion); 1296 1297 void intel_opregion_debugfs_register(struct drm_i915_private *i915) 1298 { 1299 struct drm_minor *minor = i915->drm.primary; 1300 1301 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root, 1302 i915, &intel_opregion_fops); 1303 } 1304