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 <linux/firmware.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 static int check_swsci_function(struct drm_i915_private *i915, u32 function) 254 { 255 struct opregion_swsci *swsci = i915->display.opregion.swsci; 256 u32 main_function, sub_function; 257 258 if (!swsci) 259 return -ENODEV; 260 261 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> 262 SWSCI_SCIC_MAIN_FUNCTION_SHIFT; 263 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> 264 SWSCI_SCIC_SUB_FUNCTION_SHIFT; 265 266 /* Check if we can call the function. See swsci_setup for details. */ 267 if (main_function == SWSCI_SBCB) { 268 if ((i915->display.opregion.swsci_sbcb_sub_functions & 269 (1 << sub_function)) == 0) 270 return -EINVAL; 271 } else if (main_function == SWSCI_GBDA) { 272 if ((i915->display.opregion.swsci_gbda_sub_functions & 273 (1 << sub_function)) == 0) 274 return -EINVAL; 275 } 276 277 return 0; 278 } 279 280 static int swsci(struct drm_i915_private *dev_priv, 281 u32 function, u32 parm, u32 *parm_out) 282 { 283 struct opregion_swsci *swsci = dev_priv->display.opregion.swsci; 284 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 285 u32 scic, dslp; 286 u16 swsci_val; 287 int ret; 288 289 ret = check_swsci_function(dev_priv, function); 290 if (ret) 291 return ret; 292 293 /* Driver sleep timeout in ms. */ 294 dslp = swsci->dslp; 295 if (!dslp) { 296 /* The spec says 2ms should be the default, but it's too small 297 * for some machines. */ 298 dslp = 50; 299 } else if (dslp > MAX_DSLP) { 300 /* Hey bios, trust must be earned. */ 301 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, " 302 "using %u ms instead\n", dslp, MAX_DSLP); 303 dslp = MAX_DSLP; 304 } 305 306 /* The spec tells us to do this, but we are the only user... */ 307 scic = swsci->scic; 308 if (scic & SWSCI_SCIC_INDICATOR) { 309 drm_dbg(&dev_priv->drm, "SWSCI request already in progress\n"); 310 return -EBUSY; 311 } 312 313 scic = function | SWSCI_SCIC_INDICATOR; 314 315 swsci->parm = parm; 316 swsci->scic = scic; 317 318 /* Ensure SCI event is selected and event trigger is cleared. */ 319 pci_read_config_word(pdev, SWSCI, &swsci_val); 320 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) { 321 swsci_val |= SWSCI_SCISEL; 322 swsci_val &= ~SWSCI_GSSCIE; 323 pci_write_config_word(pdev, SWSCI, swsci_val); 324 } 325 326 /* Use event trigger to tell bios to check the mail. */ 327 swsci_val |= SWSCI_GSSCIE; 328 pci_write_config_word(pdev, SWSCI, swsci_val); 329 330 /* Poll for the result. */ 331 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0) 332 if (wait_for(C, dslp)) { 333 drm_dbg(&dev_priv->drm, "SWSCI request timed out\n"); 334 return -ETIMEDOUT; 335 } 336 337 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >> 338 SWSCI_SCIC_EXIT_STATUS_SHIFT; 339 340 /* Note: scic == 0 is an error! */ 341 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) { 342 drm_dbg(&dev_priv->drm, "SWSCI request error %u\n", scic); 343 return -EIO; 344 } 345 346 if (parm_out) 347 *parm_out = swsci->parm; 348 349 return 0; 350 351 #undef C 352 } 353 354 #define DISPLAY_TYPE_CRT 0 355 #define DISPLAY_TYPE_TV 1 356 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2 357 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3 358 359 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, 360 bool enable) 361 { 362 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev); 363 u32 parm = 0; 364 u32 type = 0; 365 u32 port; 366 int ret; 367 368 /* don't care about old stuff for now */ 369 if (!HAS_DDI(dev_priv)) 370 return 0; 371 372 /* Avoid port out of bounds checks if SWSCI isn't there. */ 373 ret = check_swsci_function(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE); 374 if (ret) 375 return ret; 376 377 if (intel_encoder->type == INTEL_OUTPUT_DSI) 378 port = 0; 379 else 380 port = intel_encoder->port; 381 382 if (port == PORT_E) { 383 port = 0; 384 } else { 385 parm |= 1 << port; 386 port++; 387 } 388 389 /* 390 * The port numbering and mapping here is bizarre. The now-obsolete 391 * swsci spec supports ports numbered [0..4]. Port E is handled as a 392 * special case, but port F and beyond are not. The functionality is 393 * supposed to be obsolete for new platforms. Just bail out if the port 394 * number is out of bounds after mapping. 395 */ 396 if (port > 4) { 397 drm_dbg_kms(&dev_priv->drm, 398 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n", 399 intel_encoder->base.base.id, intel_encoder->base.name, 400 port_name(intel_encoder->port), port); 401 return -EINVAL; 402 } 403 404 if (!enable) 405 parm |= 4 << 8; 406 407 switch (intel_encoder->type) { 408 case INTEL_OUTPUT_ANALOG: 409 type = DISPLAY_TYPE_CRT; 410 break; 411 case INTEL_OUTPUT_DDI: 412 case INTEL_OUTPUT_DP: 413 case INTEL_OUTPUT_HDMI: 414 case INTEL_OUTPUT_DP_MST: 415 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; 416 break; 417 case INTEL_OUTPUT_EDP: 418 case INTEL_OUTPUT_DSI: 419 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; 420 break; 421 default: 422 drm_WARN_ONCE(&dev_priv->drm, 1, 423 "unsupported intel_encoder type %d\n", 424 intel_encoder->type); 425 return -EINVAL; 426 } 427 428 parm |= type << (16 + port * 3); 429 430 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); 431 } 432 433 static const struct { 434 pci_power_t pci_power_state; 435 u32 parm; 436 } power_state_map[] = { 437 { PCI_D0, 0x00 }, 438 { PCI_D1, 0x01 }, 439 { PCI_D2, 0x02 }, 440 { PCI_D3hot, 0x04 }, 441 { PCI_D3cold, 0x04 }, 442 }; 443 444 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv, 445 pci_power_t state) 446 { 447 int i; 448 449 if (!HAS_DDI(dev_priv)) 450 return 0; 451 452 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { 453 if (state == power_state_map[i].pci_power_state) 454 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE, 455 power_state_map[i].parm, NULL); 456 } 457 458 return -EINVAL; 459 } 460 461 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp) 462 { 463 struct intel_connector *connector; 464 struct drm_connector_list_iter conn_iter; 465 struct opregion_asle *asle = dev_priv->display.opregion.asle; 466 struct drm_device *dev = &dev_priv->drm; 467 468 drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp); 469 470 if (acpi_video_get_backlight_type() == acpi_backlight_native) { 471 drm_dbg_kms(&dev_priv->drm, 472 "opregion backlight request ignored\n"); 473 return 0; 474 } 475 476 if (!(bclp & ASLE_BCLP_VALID)) 477 return ASLC_BACKLIGHT_FAILED; 478 479 bclp &= ASLE_BCLP_MSK; 480 if (bclp > 255) 481 return ASLC_BACKLIGHT_FAILED; 482 483 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 484 485 /* 486 * Update backlight on all connectors that support backlight (usually 487 * only one). 488 */ 489 drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n", 490 bclp); 491 drm_connector_list_iter_begin(dev, &conn_iter); 492 for_each_intel_connector_iter(connector, &conn_iter) 493 intel_backlight_set_acpi(connector->base.state, bclp, 255); 494 drm_connector_list_iter_end(&conn_iter); 495 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID; 496 497 drm_modeset_unlock(&dev->mode_config.connection_mutex); 498 499 500 return 0; 501 } 502 503 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi) 504 { 505 /* alsi is the current ALS reading in lux. 0 indicates below sensor 506 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 507 drm_dbg(&dev_priv->drm, "Illum is not supported\n"); 508 return ASLC_ALS_ILLUM_FAILED; 509 } 510 511 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb) 512 { 513 drm_dbg(&dev_priv->drm, "PWM freq is not supported\n"); 514 return ASLC_PWM_FREQ_FAILED; 515 } 516 517 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit) 518 { 519 /* Panel fitting is currently controlled by the X code, so this is a 520 noop until modesetting support works fully */ 521 drm_dbg(&dev_priv->drm, "Pfit is not supported\n"); 522 return ASLC_PFIT_FAILED; 523 } 524 525 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot) 526 { 527 drm_dbg(&dev_priv->drm, "SROT is not supported\n"); 528 return ASLC_ROTATION_ANGLES_FAILED; 529 } 530 531 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer) 532 { 533 if (!iuer) 534 drm_dbg(&dev_priv->drm, 535 "Button array event is not supported (nothing)\n"); 536 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 537 drm_dbg(&dev_priv->drm, 538 "Button array event is not supported (rotation lock)\n"); 539 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 540 drm_dbg(&dev_priv->drm, 541 "Button array event is not supported (volume down)\n"); 542 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 543 drm_dbg(&dev_priv->drm, 544 "Button array event is not supported (volume up)\n"); 545 if (iuer & ASLE_IUER_WINDOWS_BTN) 546 drm_dbg(&dev_priv->drm, 547 "Button array event is not supported (windows)\n"); 548 if (iuer & ASLE_IUER_POWER_BTN) 549 drm_dbg(&dev_priv->drm, 550 "Button array event is not supported (power)\n"); 551 552 return ASLC_BUTTON_ARRAY_FAILED; 553 } 554 555 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer) 556 { 557 if (iuer & ASLE_IUER_CONVERTIBLE) 558 drm_dbg(&dev_priv->drm, 559 "Convertible is not supported (clamshell)\n"); 560 else 561 drm_dbg(&dev_priv->drm, 562 "Convertible is not supported (slate)\n"); 563 564 return ASLC_CONVERTIBLE_FAILED; 565 } 566 567 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer) 568 { 569 if (iuer & ASLE_IUER_DOCKING) 570 drm_dbg(&dev_priv->drm, "Docking is not supported (docked)\n"); 571 else 572 drm_dbg(&dev_priv->drm, 573 "Docking is not supported (undocked)\n"); 574 575 return ASLC_DOCKING_FAILED; 576 } 577 578 static u32 asle_isct_state(struct drm_i915_private *dev_priv) 579 { 580 drm_dbg(&dev_priv->drm, "ISCT is not supported\n"); 581 return ASLC_ISCT_STATE_FAILED; 582 } 583 584 static void asle_work(struct work_struct *work) 585 { 586 struct intel_opregion *opregion = 587 container_of(work, struct intel_opregion, asle_work); 588 struct drm_i915_private *dev_priv = 589 container_of(opregion, struct drm_i915_private, display.opregion); 590 struct opregion_asle *asle = dev_priv->display.opregion.asle; 591 u32 aslc_stat = 0; 592 u32 aslc_req; 593 594 if (!asle) 595 return; 596 597 aslc_req = asle->aslc; 598 599 if (!(aslc_req & ASLC_REQ_MSK)) { 600 drm_dbg(&dev_priv->drm, 601 "No request on ASLC interrupt 0x%08x\n", aslc_req); 602 return; 603 } 604 605 if (aslc_req & ASLC_SET_ALS_ILLUM) 606 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi); 607 608 if (aslc_req & ASLC_SET_BACKLIGHT) 609 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp); 610 611 if (aslc_req & ASLC_SET_PFIT) 612 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit); 613 614 if (aslc_req & ASLC_SET_PWM_FREQ) 615 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb); 616 617 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 618 aslc_stat |= asle_set_supported_rotation_angles(dev_priv, 619 asle->srot); 620 621 if (aslc_req & ASLC_BUTTON_ARRAY) 622 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer); 623 624 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 625 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer); 626 627 if (aslc_req & ASLC_DOCKING_INDICATOR) 628 aslc_stat |= asle_set_docking(dev_priv, asle->iuer); 629 630 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 631 aslc_stat |= asle_isct_state(dev_priv); 632 633 asle->aslc = aslc_stat; 634 } 635 636 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv) 637 { 638 if (dev_priv->display.opregion.asle) 639 schedule_work(&dev_priv->display.opregion.asle_work); 640 } 641 642 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 643 #define ACPI_EV_LID (1<<1) 644 #define ACPI_EV_DOCK (1<<2) 645 646 /* 647 * The only video events relevant to opregion are 0x80. These indicate either a 648 * docking event, lid switch or display switch request. In Linux, these are 649 * handled by the dock, button and video drivers. 650 */ 651 static int intel_opregion_video_event(struct notifier_block *nb, 652 unsigned long val, void *data) 653 { 654 struct intel_opregion *opregion = container_of(nb, struct intel_opregion, 655 acpi_notifier); 656 struct acpi_bus_event *event = data; 657 struct opregion_acpi *acpi; 658 int ret = NOTIFY_OK; 659 660 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 661 return NOTIFY_DONE; 662 663 acpi = opregion->acpi; 664 665 if (event->type == 0x80 && ((acpi->cevt & 1) == 0)) 666 ret = NOTIFY_BAD; 667 668 acpi->csts = 0; 669 670 return ret; 671 } 672 673 /* 674 * Initialise the DIDL field in opregion. This passes a list of devices to 675 * the firmware. Values are defined by section B.4.2 of the ACPI specification 676 * (version 3) 677 */ 678 679 static void set_did(struct intel_opregion *opregion, int i, u32 val) 680 { 681 if (i < ARRAY_SIZE(opregion->acpi->didl)) { 682 opregion->acpi->didl[i] = val; 683 } else { 684 i -= ARRAY_SIZE(opregion->acpi->didl); 685 686 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) 687 return; 688 689 opregion->acpi->did2[i] = val; 690 } 691 } 692 693 static void intel_didl_outputs(struct drm_i915_private *dev_priv) 694 { 695 struct intel_opregion *opregion = &dev_priv->display.opregion; 696 struct intel_connector *connector; 697 struct drm_connector_list_iter conn_iter; 698 int i = 0, max_outputs; 699 700 /* 701 * In theory, did2, the extended didl, gets added at opregion version 702 * 3.0. In practice, however, we're supposed to set it for earlier 703 * versions as well, since a BIOS that doesn't understand did2 should 704 * not look at it anyway. Use a variable so we can tweak this if a need 705 * arises later. 706 */ 707 max_outputs = ARRAY_SIZE(opregion->acpi->didl) + 708 ARRAY_SIZE(opregion->acpi->did2); 709 710 intel_acpi_device_id_update(dev_priv); 711 712 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 713 for_each_intel_connector_iter(connector, &conn_iter) { 714 if (i < max_outputs) 715 set_did(opregion, i, connector->acpi_device_id); 716 i++; 717 } 718 drm_connector_list_iter_end(&conn_iter); 719 720 drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i); 721 722 if (i > max_outputs) 723 drm_err(&dev_priv->drm, 724 "More than %d outputs in connector list\n", 725 max_outputs); 726 727 /* If fewer than max outputs, the list must be null terminated */ 728 if (i < max_outputs) 729 set_did(opregion, i, 0); 730 } 731 732 static void intel_setup_cadls(struct drm_i915_private *dev_priv) 733 { 734 struct intel_opregion *opregion = &dev_priv->display.opregion; 735 struct intel_connector *connector; 736 struct drm_connector_list_iter conn_iter; 737 int i = 0; 738 739 /* 740 * Initialize the CADL field from the connector device ids. This is 741 * essentially the same as copying from the DIDL. Technically, this is 742 * not always correct as display outputs may exist, but not active. This 743 * initialization is necessary for some Clevo laptops that check this 744 * field before processing the brightness and display switching hotkeys. 745 * 746 * Note that internal panels should be at the front of the connector 747 * list already, ensuring they're not left out. 748 */ 749 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 750 for_each_intel_connector_iter(connector, &conn_iter) { 751 if (i >= ARRAY_SIZE(opregion->acpi->cadl)) 752 break; 753 opregion->acpi->cadl[i++] = connector->acpi_device_id; 754 } 755 drm_connector_list_iter_end(&conn_iter); 756 757 /* If fewer than 8 active devices, the list must be null terminated */ 758 if (i < ARRAY_SIZE(opregion->acpi->cadl)) 759 opregion->acpi->cadl[i] = 0; 760 } 761 762 static void swsci_setup(struct drm_i915_private *dev_priv) 763 { 764 struct intel_opregion *opregion = &dev_priv->display.opregion; 765 bool requested_callbacks = false; 766 u32 tmp; 767 768 /* Sub-function code 0 is okay, let's allow them. */ 769 opregion->swsci_gbda_sub_functions = 1; 770 opregion->swsci_sbcb_sub_functions = 1; 771 772 /* We use GBDA to ask for supported GBDA calls. */ 773 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 774 /* make the bits match the sub-function codes */ 775 tmp <<= 1; 776 opregion->swsci_gbda_sub_functions |= tmp; 777 } 778 779 /* 780 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 781 * must not call interfaces that are not specifically requested by the 782 * bios. 783 */ 784 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 785 /* here, the bits already match sub-function codes */ 786 opregion->swsci_sbcb_sub_functions |= tmp; 787 requested_callbacks = true; 788 } 789 790 /* 791 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 792 * the callback is _requested_. But we still can't call interfaces that 793 * are not requested. 794 */ 795 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 796 /* make the bits match the sub-function codes */ 797 u32 low = tmp & 0x7ff; 798 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 799 tmp = (high << 4) | (low << 1) | 1; 800 801 /* best guess what to do with supported wrt requested */ 802 if (requested_callbacks) { 803 u32 req = opregion->swsci_sbcb_sub_functions; 804 if ((req & tmp) != req) 805 drm_dbg(&dev_priv->drm, 806 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", 807 req, tmp); 808 /* XXX: for now, trust the requested callbacks */ 809 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 810 } else { 811 opregion->swsci_sbcb_sub_functions |= tmp; 812 } 813 } 814 815 drm_dbg(&dev_priv->drm, 816 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 817 opregion->swsci_gbda_sub_functions, 818 opregion->swsci_sbcb_sub_functions); 819 } 820 821 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 822 { 823 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 824 "VBIOS ROM for %s\n", id->ident); 825 return 1; 826 } 827 828 static const struct dmi_system_id intel_no_opregion_vbt[] = { 829 { 830 .callback = intel_no_opregion_vbt_callback, 831 .ident = "ThinkCentre A57", 832 .matches = { 833 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 834 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 835 }, 836 }, 837 { } 838 }; 839 840 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv) 841 { 842 struct intel_opregion *opregion = &dev_priv->display.opregion; 843 const struct firmware *fw = NULL; 844 const char *name = dev_priv->params.vbt_firmware; 845 int ret; 846 847 if (!name || !*name) 848 return -ENOENT; 849 850 ret = request_firmware(&fw, name, dev_priv->drm.dev); 851 if (ret) { 852 drm_err(&dev_priv->drm, 853 "Requesting VBT firmware \"%s\" failed (%d)\n", 854 name, ret); 855 return ret; 856 } 857 858 if (intel_bios_is_valid_vbt(fw->data, fw->size)) { 859 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL); 860 if (opregion->vbt_firmware) { 861 drm_dbg_kms(&dev_priv->drm, 862 "Found valid VBT firmware \"%s\"\n", name); 863 opregion->vbt = opregion->vbt_firmware; 864 opregion->vbt_size = fw->size; 865 ret = 0; 866 } else { 867 ret = -ENOMEM; 868 } 869 } else { 870 drm_dbg_kms(&dev_priv->drm, "Invalid VBT firmware \"%s\"\n", 871 name); 872 ret = -EINVAL; 873 } 874 875 release_firmware(fw); 876 877 return ret; 878 } 879 880 int intel_opregion_setup(struct drm_i915_private *dev_priv) 881 { 882 struct intel_opregion *opregion = &dev_priv->display.opregion; 883 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 884 u32 asls, mboxes; 885 char buf[sizeof(OPREGION_SIGNATURE)]; 886 int err = 0; 887 void *base; 888 const void *vbt; 889 u32 vbt_size; 890 891 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); 892 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); 893 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); 894 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 895 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400); 896 897 pci_read_config_dword(pdev, ASLS, &asls); 898 drm_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n", 899 asls); 900 if (asls == 0) { 901 drm_dbg(&dev_priv->drm, "ACPI OpRegion not supported!\n"); 902 return -ENOTSUPP; 903 } 904 905 INIT_WORK(&opregion->asle_work, asle_work); 906 907 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB); 908 if (!base) 909 return -ENOMEM; 910 911 memcpy(buf, base, sizeof(buf)); 912 913 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 914 drm_dbg(&dev_priv->drm, "opregion signature mismatch\n"); 915 err = -EINVAL; 916 goto err_out; 917 } 918 opregion->header = base; 919 opregion->lid_state = base + ACPI_CLID; 920 921 drm_dbg(&dev_priv->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(&dev_priv->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(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n"); 944 } else { 945 if (major >= 2) 946 drm_dbg(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v2.x\n"); 947 drm_dbg(&dev_priv->drm, "SWSCI supported\n"); 948 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 949 swsci_setup(dev_priv); 950 } 951 } 952 953 if (mboxes & MBOX_ASLE) { 954 drm_dbg(&dev_priv->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(&dev_priv->drm, "ASLE extension supported\n"); 962 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET; 963 } 964 965 if (mboxes & MBOX_BACKLIGHT) { 966 drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n"); 967 } 968 969 if (intel_load_vbt_firmware(dev_priv) == 0) 970 goto out; 971 972 if (dmi_check_system(intel_no_opregion_vbt)) 973 goto out; 974 975 if (opregion->header->over.major >= 2 && opregion->asle && 976 opregion->asle->rvda && opregion->asle->rvds) { 977 resource_size_t rvda = opregion->asle->rvda; 978 979 /* 980 * opregion 2.0: rvda is the physical VBT address. 981 * 982 * opregion 2.1+: rvda is unsigned, relative offset from 983 * opregion base, and should never point within opregion. 984 */ 985 if (opregion->header->over.major > 2 || 986 opregion->header->over.minor >= 1) { 987 drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE); 988 989 rvda += asls; 990 } 991 992 opregion->rvda = memremap(rvda, opregion->asle->rvds, 993 MEMREMAP_WB); 994 995 vbt = opregion->rvda; 996 vbt_size = opregion->asle->rvds; 997 if (intel_bios_is_valid_vbt(vbt, vbt_size)) { 998 drm_dbg_kms(&dev_priv->drm, 999 "Found valid VBT in ACPI OpRegion (RVDA)\n"); 1000 opregion->vbt = vbt; 1001 opregion->vbt_size = vbt_size; 1002 goto out; 1003 } else { 1004 drm_dbg_kms(&dev_priv->drm, 1005 "Invalid VBT in ACPI OpRegion (RVDA)\n"); 1006 memunmap(opregion->rvda); 1007 opregion->rvda = NULL; 1008 } 1009 } 1010 1011 vbt = base + OPREGION_VBT_OFFSET; 1012 /* 1013 * The VBT specification says that if the ASLE ext mailbox is not used 1014 * its area is reserved, but on some CHT boards the VBT extends into the 1015 * ASLE ext area. Allow this even though it is against the spec, so we 1016 * do not end up rejecting the VBT on those boards (and end up not 1017 * finding the LCD panel because of this). 1018 */ 1019 vbt_size = (mboxes & MBOX_ASLE_EXT) ? 1020 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; 1021 vbt_size -= OPREGION_VBT_OFFSET; 1022 if (intel_bios_is_valid_vbt(vbt, vbt_size)) { 1023 drm_dbg_kms(&dev_priv->drm, 1024 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); 1025 opregion->vbt = vbt; 1026 opregion->vbt_size = vbt_size; 1027 } else { 1028 drm_dbg_kms(&dev_priv->drm, 1029 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); 1030 } 1031 1032 out: 1033 return 0; 1034 1035 err_out: 1036 memunmap(base); 1037 return err; 1038 } 1039 1040 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id) 1041 { 1042 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident); 1043 return 1; 1044 } 1045 1046 static const struct dmi_system_id intel_use_opregion_panel_type[] = { 1047 { 1048 .callback = intel_use_opregion_panel_type_callback, 1049 .ident = "Conrac GmbH IX45GM2", 1050 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"), 1051 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"), 1052 }, 1053 }, 1054 { } 1055 }; 1056 1057 int 1058 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv) 1059 { 1060 u32 panel_details; 1061 int ret; 1062 1063 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details); 1064 if (ret) 1065 return ret; 1066 1067 ret = (panel_details >> 8) & 0xff; 1068 if (ret > 0x10) { 1069 drm_dbg_kms(&dev_priv->drm, 1070 "Invalid OpRegion panel type 0x%x\n", ret); 1071 return -EINVAL; 1072 } 1073 1074 /* fall back to VBT panel type? */ 1075 if (ret == 0x0) { 1076 drm_dbg_kms(&dev_priv->drm, "No panel type in OpRegion\n"); 1077 return -ENODEV; 1078 } 1079 1080 /* 1081 * So far we know that some machined must use it, others must not use it. 1082 * There doesn't seem to be any way to determine which way to go, except 1083 * via a quirk list :( 1084 */ 1085 if (!dmi_check_system(intel_use_opregion_panel_type)) { 1086 drm_dbg_kms(&dev_priv->drm, 1087 "Ignoring OpRegion panel type (%d)\n", ret - 1); 1088 return -ENODEV; 1089 } 1090 1091 return ret - 1; 1092 } 1093 1094 /** 1095 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5 1096 * @intel_connector: eDP connector 1097 * 1098 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed 1099 * to it. 1100 * 1101 * Returns: 1102 * The EDID in the OpRegion, or NULL if there is none or it's invalid. 1103 * 1104 */ 1105 struct edid *intel_opregion_get_edid(struct intel_connector *intel_connector) 1106 { 1107 struct drm_connector *connector = &intel_connector->base; 1108 struct drm_i915_private *i915 = to_i915(connector->dev); 1109 struct intel_opregion *opregion = &i915->display.opregion; 1110 const void *in_edid; 1111 const struct edid *edid; 1112 struct edid *new_edid; 1113 int len; 1114 1115 if (!opregion->asle_ext) 1116 return NULL; 1117 1118 in_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 || !memchr_inv(in_edid, 0, len)) 1123 return NULL; 1124 1125 edid = in_edid; 1126 1127 if (len < EDID_LENGTH * (1 + edid->extensions)) { 1128 drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5): too short\n"); 1129 return NULL; 1130 } 1131 new_edid = drm_edid_duplicate(edid); 1132 if (!new_edid) 1133 return NULL; 1134 if (!drm_edid_is_valid(new_edid)) { 1135 kfree(new_edid); 1136 drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n"); 1137 return NULL; 1138 } 1139 return new_edid; 1140 } 1141 1142 bool intel_opregion_headless_sku(struct drm_i915_private *i915) 1143 { 1144 struct intel_opregion *opregion = &i915->display.opregion; 1145 struct opregion_header *header = opregion->header; 1146 1147 if (!header || header->over.major < 2 || 1148 (header->over.major == 2 && header->over.minor < 3)) 1149 return false; 1150 1151 return opregion->header->pcon & PCON_HEADLESS_SKU; 1152 } 1153 1154 void intel_opregion_register(struct drm_i915_private *i915) 1155 { 1156 struct intel_opregion *opregion = &i915->display.opregion; 1157 1158 if (!opregion->header) 1159 return; 1160 1161 if (opregion->acpi) { 1162 opregion->acpi_notifier.notifier_call = 1163 intel_opregion_video_event; 1164 register_acpi_notifier(&opregion->acpi_notifier); 1165 } 1166 1167 intel_opregion_resume(i915); 1168 } 1169 1170 void intel_opregion_resume(struct drm_i915_private *i915) 1171 { 1172 struct intel_opregion *opregion = &i915->display.opregion; 1173 1174 if (!opregion->header) 1175 return; 1176 1177 if (opregion->acpi) { 1178 intel_didl_outputs(i915); 1179 intel_setup_cadls(i915); 1180 1181 /* 1182 * Notify BIOS we are ready to handle ACPI video ext notifs. 1183 * Right now, all the events are handled by the ACPI video 1184 * module. We don't actually need to do anything with them. 1185 */ 1186 opregion->acpi->csts = 0; 1187 opregion->acpi->drdy = 1; 1188 } 1189 1190 if (opregion->asle) { 1191 opregion->asle->tche = ASLE_TCHE_BLC_EN; 1192 opregion->asle->ardy = ASLE_ARDY_READY; 1193 } 1194 1195 /* Some platforms abuse the _DSM to enable MUX */ 1196 intel_dsm_get_bios_data_funcs_supported(i915); 1197 1198 intel_opregion_notify_adapter(i915, PCI_D0); 1199 } 1200 1201 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state) 1202 { 1203 struct intel_opregion *opregion = &i915->display.opregion; 1204 1205 if (!opregion->header) 1206 return; 1207 1208 intel_opregion_notify_adapter(i915, state); 1209 1210 if (opregion->asle) 1211 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 1212 1213 cancel_work_sync(&i915->display.opregion.asle_work); 1214 1215 if (opregion->acpi) 1216 opregion->acpi->drdy = 0; 1217 } 1218 1219 void intel_opregion_unregister(struct drm_i915_private *i915) 1220 { 1221 struct intel_opregion *opregion = &i915->display.opregion; 1222 1223 intel_opregion_suspend(i915, PCI_D1); 1224 1225 if (!opregion->header) 1226 return; 1227 1228 if (opregion->acpi_notifier.notifier_call) { 1229 unregister_acpi_notifier(&opregion->acpi_notifier); 1230 opregion->acpi_notifier.notifier_call = NULL; 1231 } 1232 1233 /* just clear all opregion memory pointers now */ 1234 memunmap(opregion->header); 1235 if (opregion->rvda) { 1236 memunmap(opregion->rvda); 1237 opregion->rvda = NULL; 1238 } 1239 if (opregion->vbt_firmware) { 1240 kfree(opregion->vbt_firmware); 1241 opregion->vbt_firmware = NULL; 1242 } 1243 opregion->header = NULL; 1244 opregion->acpi = NULL; 1245 opregion->swsci = NULL; 1246 opregion->asle = NULL; 1247 opregion->asle_ext = NULL; 1248 opregion->vbt = NULL; 1249 opregion->lid_state = NULL; 1250 } 1251