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; 466 467 drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp); 468 469 if (acpi_video_get_backlight_type() == acpi_backlight_native) { 470 drm_dbg_kms(&dev_priv->drm, 471 "opregion backlight request ignored\n"); 472 return 0; 473 } 474 475 if (!(bclp & ASLE_BCLP_VALID)) 476 return ASLC_BACKLIGHT_FAILED; 477 478 bclp &= ASLE_BCLP_MSK; 479 if (bclp > 255) 480 return ASLC_BACKLIGHT_FAILED; 481 482 drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex, NULL); 483 484 /* 485 * Update backlight on all connectors that support backlight (usually 486 * only one). 487 */ 488 drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n", 489 bclp); 490 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 491 for_each_intel_connector_iter(connector, &conn_iter) 492 intel_backlight_set_acpi(connector->base.state, bclp, 255); 493 drm_connector_list_iter_end(&conn_iter); 494 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID; 495 496 drm_modeset_unlock(&dev_priv->drm.mode_config.connection_mutex); 497 498 499 return 0; 500 } 501 502 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi) 503 { 504 /* alsi is the current ALS reading in lux. 0 indicates below sensor 505 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 506 drm_dbg(&dev_priv->drm, "Illum is not supported\n"); 507 return ASLC_ALS_ILLUM_FAILED; 508 } 509 510 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb) 511 { 512 drm_dbg(&dev_priv->drm, "PWM freq is not supported\n"); 513 return ASLC_PWM_FREQ_FAILED; 514 } 515 516 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit) 517 { 518 /* Panel fitting is currently controlled by the X code, so this is a 519 noop until modesetting support works fully */ 520 drm_dbg(&dev_priv->drm, "Pfit is not supported\n"); 521 return ASLC_PFIT_FAILED; 522 } 523 524 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot) 525 { 526 drm_dbg(&dev_priv->drm, "SROT is not supported\n"); 527 return ASLC_ROTATION_ANGLES_FAILED; 528 } 529 530 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer) 531 { 532 if (!iuer) 533 drm_dbg(&dev_priv->drm, 534 "Button array event is not supported (nothing)\n"); 535 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 536 drm_dbg(&dev_priv->drm, 537 "Button array event is not supported (rotation lock)\n"); 538 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 539 drm_dbg(&dev_priv->drm, 540 "Button array event is not supported (volume down)\n"); 541 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 542 drm_dbg(&dev_priv->drm, 543 "Button array event is not supported (volume up)\n"); 544 if (iuer & ASLE_IUER_WINDOWS_BTN) 545 drm_dbg(&dev_priv->drm, 546 "Button array event is not supported (windows)\n"); 547 if (iuer & ASLE_IUER_POWER_BTN) 548 drm_dbg(&dev_priv->drm, 549 "Button array event is not supported (power)\n"); 550 551 return ASLC_BUTTON_ARRAY_FAILED; 552 } 553 554 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer) 555 { 556 if (iuer & ASLE_IUER_CONVERTIBLE) 557 drm_dbg(&dev_priv->drm, 558 "Convertible is not supported (clamshell)\n"); 559 else 560 drm_dbg(&dev_priv->drm, 561 "Convertible is not supported (slate)\n"); 562 563 return ASLC_CONVERTIBLE_FAILED; 564 } 565 566 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer) 567 { 568 if (iuer & ASLE_IUER_DOCKING) 569 drm_dbg(&dev_priv->drm, "Docking is not supported (docked)\n"); 570 else 571 drm_dbg(&dev_priv->drm, 572 "Docking is not supported (undocked)\n"); 573 574 return ASLC_DOCKING_FAILED; 575 } 576 577 static u32 asle_isct_state(struct drm_i915_private *dev_priv) 578 { 579 drm_dbg(&dev_priv->drm, "ISCT is not supported\n"); 580 return ASLC_ISCT_STATE_FAILED; 581 } 582 583 static void asle_work(struct work_struct *work) 584 { 585 struct intel_opregion *opregion = 586 container_of(work, struct intel_opregion, asle_work); 587 struct drm_i915_private *dev_priv = 588 container_of(opregion, struct drm_i915_private, display.opregion); 589 struct opregion_asle *asle = dev_priv->display.opregion.asle; 590 u32 aslc_stat = 0; 591 u32 aslc_req; 592 593 if (!asle) 594 return; 595 596 aslc_req = asle->aslc; 597 598 if (!(aslc_req & ASLC_REQ_MSK)) { 599 drm_dbg(&dev_priv->drm, 600 "No request on ASLC interrupt 0x%08x\n", aslc_req); 601 return; 602 } 603 604 if (aslc_req & ASLC_SET_ALS_ILLUM) 605 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi); 606 607 if (aslc_req & ASLC_SET_BACKLIGHT) 608 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp); 609 610 if (aslc_req & ASLC_SET_PFIT) 611 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit); 612 613 if (aslc_req & ASLC_SET_PWM_FREQ) 614 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb); 615 616 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 617 aslc_stat |= asle_set_supported_rotation_angles(dev_priv, 618 asle->srot); 619 620 if (aslc_req & ASLC_BUTTON_ARRAY) 621 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer); 622 623 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 624 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer); 625 626 if (aslc_req & ASLC_DOCKING_INDICATOR) 627 aslc_stat |= asle_set_docking(dev_priv, asle->iuer); 628 629 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 630 aslc_stat |= asle_isct_state(dev_priv); 631 632 asle->aslc = aslc_stat; 633 } 634 635 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv) 636 { 637 if (dev_priv->display.opregion.asle) 638 schedule_work(&dev_priv->display.opregion.asle_work); 639 } 640 641 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 642 #define ACPI_EV_LID (1<<1) 643 #define ACPI_EV_DOCK (1<<2) 644 645 /* 646 * The only video events relevant to opregion are 0x80. These indicate either a 647 * docking event, lid switch or display switch request. In Linux, these are 648 * handled by the dock, button and video drivers. 649 */ 650 static int intel_opregion_video_event(struct notifier_block *nb, 651 unsigned long val, void *data) 652 { 653 struct intel_opregion *opregion = container_of(nb, struct intel_opregion, 654 acpi_notifier); 655 struct acpi_bus_event *event = data; 656 struct opregion_acpi *acpi; 657 int ret = NOTIFY_OK; 658 659 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 660 return NOTIFY_DONE; 661 662 acpi = opregion->acpi; 663 664 if (event->type == 0x80 && ((acpi->cevt & 1) == 0)) 665 ret = NOTIFY_BAD; 666 667 acpi->csts = 0; 668 669 return ret; 670 } 671 672 /* 673 * Initialise the DIDL field in opregion. This passes a list of devices to 674 * the firmware. Values are defined by section B.4.2 of the ACPI specification 675 * (version 3) 676 */ 677 678 static void set_did(struct intel_opregion *opregion, int i, u32 val) 679 { 680 if (i < ARRAY_SIZE(opregion->acpi->didl)) { 681 opregion->acpi->didl[i] = val; 682 } else { 683 i -= ARRAY_SIZE(opregion->acpi->didl); 684 685 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) 686 return; 687 688 opregion->acpi->did2[i] = val; 689 } 690 } 691 692 static void intel_didl_outputs(struct drm_i915_private *dev_priv) 693 { 694 struct intel_opregion *opregion = &dev_priv->display.opregion; 695 struct intel_connector *connector; 696 struct drm_connector_list_iter conn_iter; 697 int i = 0, max_outputs; 698 699 /* 700 * In theory, did2, the extended didl, gets added at opregion version 701 * 3.0. In practice, however, we're supposed to set it for earlier 702 * versions as well, since a BIOS that doesn't understand did2 should 703 * not look at it anyway. Use a variable so we can tweak this if a need 704 * arises later. 705 */ 706 max_outputs = ARRAY_SIZE(opregion->acpi->didl) + 707 ARRAY_SIZE(opregion->acpi->did2); 708 709 intel_acpi_device_id_update(dev_priv); 710 711 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 712 for_each_intel_connector_iter(connector, &conn_iter) { 713 if (i < max_outputs) 714 set_did(opregion, i, connector->acpi_device_id); 715 i++; 716 } 717 drm_connector_list_iter_end(&conn_iter); 718 719 drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i); 720 721 if (i > max_outputs) 722 drm_err(&dev_priv->drm, 723 "More than %d outputs in connector list\n", 724 max_outputs); 725 726 /* If fewer than max outputs, the list must be null terminated */ 727 if (i < max_outputs) 728 set_did(opregion, i, 0); 729 } 730 731 static void intel_setup_cadls(struct drm_i915_private *dev_priv) 732 { 733 struct intel_opregion *opregion = &dev_priv->display.opregion; 734 struct intel_connector *connector; 735 struct drm_connector_list_iter conn_iter; 736 int i = 0; 737 738 /* 739 * Initialize the CADL field from the connector device ids. This is 740 * essentially the same as copying from the DIDL. Technically, this is 741 * not always correct as display outputs may exist, but not active. This 742 * initialization is necessary for some Clevo laptops that check this 743 * field before processing the brightness and display switching hotkeys. 744 * 745 * Note that internal panels should be at the front of the connector 746 * list already, ensuring they're not left out. 747 */ 748 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 749 for_each_intel_connector_iter(connector, &conn_iter) { 750 if (i >= ARRAY_SIZE(opregion->acpi->cadl)) 751 break; 752 opregion->acpi->cadl[i++] = connector->acpi_device_id; 753 } 754 drm_connector_list_iter_end(&conn_iter); 755 756 /* If fewer than 8 active devices, the list must be null terminated */ 757 if (i < ARRAY_SIZE(opregion->acpi->cadl)) 758 opregion->acpi->cadl[i] = 0; 759 } 760 761 static void swsci_setup(struct drm_i915_private *dev_priv) 762 { 763 struct intel_opregion *opregion = &dev_priv->display.opregion; 764 bool requested_callbacks = false; 765 u32 tmp; 766 767 /* Sub-function code 0 is okay, let's allow them. */ 768 opregion->swsci_gbda_sub_functions = 1; 769 opregion->swsci_sbcb_sub_functions = 1; 770 771 /* We use GBDA to ask for supported GBDA calls. */ 772 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 773 /* make the bits match the sub-function codes */ 774 tmp <<= 1; 775 opregion->swsci_gbda_sub_functions |= tmp; 776 } 777 778 /* 779 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 780 * must not call interfaces that are not specifically requested by the 781 * bios. 782 */ 783 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 784 /* here, the bits already match sub-function codes */ 785 opregion->swsci_sbcb_sub_functions |= tmp; 786 requested_callbacks = true; 787 } 788 789 /* 790 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 791 * the callback is _requested_. But we still can't call interfaces that 792 * are not requested. 793 */ 794 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 795 /* make the bits match the sub-function codes */ 796 u32 low = tmp & 0x7ff; 797 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 798 tmp = (high << 4) | (low << 1) | 1; 799 800 /* best guess what to do with supported wrt requested */ 801 if (requested_callbacks) { 802 u32 req = opregion->swsci_sbcb_sub_functions; 803 if ((req & tmp) != req) 804 drm_dbg(&dev_priv->drm, 805 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", 806 req, tmp); 807 /* XXX: for now, trust the requested callbacks */ 808 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 809 } else { 810 opregion->swsci_sbcb_sub_functions |= tmp; 811 } 812 } 813 814 drm_dbg(&dev_priv->drm, 815 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 816 opregion->swsci_gbda_sub_functions, 817 opregion->swsci_sbcb_sub_functions); 818 } 819 820 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 821 { 822 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 823 "VBIOS ROM for %s\n", id->ident); 824 return 1; 825 } 826 827 static const struct dmi_system_id intel_no_opregion_vbt[] = { 828 { 829 .callback = intel_no_opregion_vbt_callback, 830 .ident = "ThinkCentre A57", 831 .matches = { 832 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 833 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 834 }, 835 }, 836 { } 837 }; 838 839 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv) 840 { 841 struct intel_opregion *opregion = &dev_priv->display.opregion; 842 const struct firmware *fw = NULL; 843 const char *name = dev_priv->params.vbt_firmware; 844 int ret; 845 846 if (!name || !*name) 847 return -ENOENT; 848 849 ret = request_firmware(&fw, name, dev_priv->drm.dev); 850 if (ret) { 851 drm_err(&dev_priv->drm, 852 "Requesting VBT firmware \"%s\" failed (%d)\n", 853 name, ret); 854 return ret; 855 } 856 857 if (intel_bios_is_valid_vbt(fw->data, fw->size)) { 858 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL); 859 if (opregion->vbt_firmware) { 860 drm_dbg_kms(&dev_priv->drm, 861 "Found valid VBT firmware \"%s\"\n", name); 862 opregion->vbt = opregion->vbt_firmware; 863 opregion->vbt_size = fw->size; 864 ret = 0; 865 } else { 866 ret = -ENOMEM; 867 } 868 } else { 869 drm_dbg_kms(&dev_priv->drm, "Invalid VBT firmware \"%s\"\n", 870 name); 871 ret = -EINVAL; 872 } 873 874 release_firmware(fw); 875 876 return ret; 877 } 878 879 int intel_opregion_setup(struct drm_i915_private *dev_priv) 880 { 881 struct intel_opregion *opregion = &dev_priv->display.opregion; 882 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 883 u32 asls, mboxes; 884 char buf[sizeof(OPREGION_SIGNATURE)]; 885 int err = 0; 886 void *base; 887 const void *vbt; 888 u32 vbt_size; 889 890 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); 891 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); 892 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); 893 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 894 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400); 895 896 pci_read_config_dword(pdev, ASLS, &asls); 897 drm_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n", 898 asls); 899 if (asls == 0) { 900 drm_dbg(&dev_priv->drm, "ACPI OpRegion not supported!\n"); 901 return -ENOTSUPP; 902 } 903 904 INIT_WORK(&opregion->asle_work, asle_work); 905 906 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB); 907 if (!base) 908 return -ENOMEM; 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 opregion->lid_state = base + ACPI_CLID; 919 920 drm_dbg(&dev_priv->drm, "ACPI OpRegion version %u.%u.%u\n", 921 opregion->header->over.major, 922 opregion->header->over.minor, 923 opregion->header->over.revision); 924 925 mboxes = opregion->header->mboxes; 926 if (mboxes & MBOX_ACPI) { 927 drm_dbg(&dev_priv->drm, "Public ACPI methods supported\n"); 928 opregion->acpi = base + OPREGION_ACPI_OFFSET; 929 /* 930 * Indicate we handle monitor hotplug events ourselves so we do 931 * not need ACPI notifications for them. Disabling these avoids 932 * triggering the AML code doing the notifation, which may be 933 * broken as Windows also seems to disable these. 934 */ 935 opregion->acpi->chpd = 1; 936 } 937 938 if (mboxes & MBOX_SWSCI) { 939 u8 major = opregion->header->over.major; 940 941 if (major >= 3) { 942 drm_err(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n"); 943 } else { 944 if (major >= 2) 945 drm_dbg(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v2.x\n"); 946 drm_dbg(&dev_priv->drm, "SWSCI supported\n"); 947 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 948 swsci_setup(dev_priv); 949 } 950 } 951 952 if (mboxes & MBOX_ASLE) { 953 drm_dbg(&dev_priv->drm, "ASLE supported\n"); 954 opregion->asle = base + OPREGION_ASLE_OFFSET; 955 956 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 957 } 958 959 if (mboxes & MBOX_ASLE_EXT) { 960 drm_dbg(&dev_priv->drm, "ASLE extension supported\n"); 961 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET; 962 } 963 964 if (mboxes & MBOX_BACKLIGHT) { 965 drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n"); 966 } 967 968 if (intel_load_vbt_firmware(dev_priv) == 0) 969 goto out; 970 971 if (dmi_check_system(intel_no_opregion_vbt)) 972 goto out; 973 974 if (opregion->header->over.major >= 2 && opregion->asle && 975 opregion->asle->rvda && opregion->asle->rvds) { 976 resource_size_t rvda = opregion->asle->rvda; 977 978 /* 979 * opregion 2.0: rvda is the physical VBT address. 980 * 981 * opregion 2.1+: rvda is unsigned, relative offset from 982 * opregion base, and should never point within opregion. 983 */ 984 if (opregion->header->over.major > 2 || 985 opregion->header->over.minor >= 1) { 986 drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE); 987 988 rvda += asls; 989 } 990 991 opregion->rvda = memremap(rvda, opregion->asle->rvds, 992 MEMREMAP_WB); 993 994 vbt = opregion->rvda; 995 vbt_size = opregion->asle->rvds; 996 if (intel_bios_is_valid_vbt(vbt, vbt_size)) { 997 drm_dbg_kms(&dev_priv->drm, 998 "Found valid VBT in ACPI OpRegion (RVDA)\n"); 999 opregion->vbt = vbt; 1000 opregion->vbt_size = vbt_size; 1001 goto out; 1002 } else { 1003 drm_dbg_kms(&dev_priv->drm, 1004 "Invalid VBT in ACPI OpRegion (RVDA)\n"); 1005 memunmap(opregion->rvda); 1006 opregion->rvda = NULL; 1007 } 1008 } 1009 1010 vbt = base + OPREGION_VBT_OFFSET; 1011 /* 1012 * The VBT specification says that if the ASLE ext mailbox is not used 1013 * its area is reserved, but on some CHT boards the VBT extends into the 1014 * ASLE ext area. Allow this even though it is against the spec, so we 1015 * do not end up rejecting the VBT on those boards (and end up not 1016 * finding the LCD panel because of this). 1017 */ 1018 vbt_size = (mboxes & MBOX_ASLE_EXT) ? 1019 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; 1020 vbt_size -= OPREGION_VBT_OFFSET; 1021 if (intel_bios_is_valid_vbt(vbt, vbt_size)) { 1022 drm_dbg_kms(&dev_priv->drm, 1023 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); 1024 opregion->vbt = vbt; 1025 opregion->vbt_size = vbt_size; 1026 } else { 1027 drm_dbg_kms(&dev_priv->drm, 1028 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); 1029 } 1030 1031 out: 1032 return 0; 1033 1034 err_out: 1035 memunmap(base); 1036 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->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_headless_sku(struct drm_i915_private *i915) 1135 { 1136 struct intel_opregion *opregion = &i915->display.opregion; 1137 struct opregion_header *header = opregion->header; 1138 1139 if (!header || header->over.major < 2 || 1140 (header->over.major == 2 && header->over.minor < 3)) 1141 return false; 1142 1143 return opregion->header->pcon & PCON_HEADLESS_SKU; 1144 } 1145 1146 void intel_opregion_register(struct drm_i915_private *i915) 1147 { 1148 struct intel_opregion *opregion = &i915->display.opregion; 1149 1150 if (!opregion->header) 1151 return; 1152 1153 if (opregion->acpi) { 1154 opregion->acpi_notifier.notifier_call = 1155 intel_opregion_video_event; 1156 register_acpi_notifier(&opregion->acpi_notifier); 1157 } 1158 1159 intel_opregion_resume(i915); 1160 } 1161 1162 static void intel_opregion_resume_display(struct drm_i915_private *i915) 1163 { 1164 struct intel_opregion *opregion = &i915->display.opregion; 1165 1166 if (opregion->acpi) { 1167 intel_didl_outputs(i915); 1168 intel_setup_cadls(i915); 1169 1170 /* 1171 * Notify BIOS we are ready to handle ACPI video ext notifs. 1172 * Right now, all the events are handled by the ACPI video 1173 * module. We don't actually need to do anything with them. 1174 */ 1175 opregion->acpi->csts = 0; 1176 opregion->acpi->drdy = 1; 1177 } 1178 1179 if (opregion->asle) { 1180 opregion->asle->tche = ASLE_TCHE_BLC_EN; 1181 opregion->asle->ardy = ASLE_ARDY_READY; 1182 } 1183 1184 /* Some platforms abuse the _DSM to enable MUX */ 1185 intel_dsm_get_bios_data_funcs_supported(i915); 1186 } 1187 1188 void intel_opregion_resume(struct drm_i915_private *i915) 1189 { 1190 struct intel_opregion *opregion = &i915->display.opregion; 1191 1192 if (!opregion->header) 1193 return; 1194 1195 if (HAS_DISPLAY(i915)) 1196 intel_opregion_resume_display(i915); 1197 1198 intel_opregion_notify_adapter(i915, PCI_D0); 1199 } 1200 1201 static void intel_opregion_suspend_display(struct drm_i915_private *i915) 1202 { 1203 struct intel_opregion *opregion = &i915->display.opregion; 1204 1205 if (opregion->asle) 1206 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 1207 1208 cancel_work_sync(&i915->display.opregion.asle_work); 1209 1210 if (opregion->acpi) 1211 opregion->acpi->drdy = 0; 1212 } 1213 1214 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state) 1215 { 1216 struct intel_opregion *opregion = &i915->display.opregion; 1217 1218 if (!opregion->header) 1219 return; 1220 1221 intel_opregion_notify_adapter(i915, state); 1222 1223 if (HAS_DISPLAY(i915)) 1224 intel_opregion_suspend_display(i915); 1225 } 1226 1227 void intel_opregion_unregister(struct drm_i915_private *i915) 1228 { 1229 struct intel_opregion *opregion = &i915->display.opregion; 1230 1231 intel_opregion_suspend(i915, PCI_D1); 1232 1233 if (!opregion->header) 1234 return; 1235 1236 if (opregion->acpi_notifier.notifier_call) { 1237 unregister_acpi_notifier(&opregion->acpi_notifier); 1238 opregion->acpi_notifier.notifier_call = NULL; 1239 } 1240 } 1241 1242 void intel_opregion_cleanup(struct drm_i915_private *i915) 1243 { 1244 struct intel_opregion *opregion = &i915->display.opregion; 1245 1246 if (!opregion->header) 1247 return; 1248 1249 /* just clear all opregion memory pointers now */ 1250 memunmap(opregion->header); 1251 if (opregion->rvda) { 1252 memunmap(opregion->rvda); 1253 opregion->rvda = NULL; 1254 } 1255 if (opregion->vbt_firmware) { 1256 kfree(opregion->vbt_firmware); 1257 opregion->vbt_firmware = NULL; 1258 } 1259 opregion->header = NULL; 1260 opregion->acpi = NULL; 1261 opregion->swsci = NULL; 1262 opregion->asle = NULL; 1263 opregion->asle_ext = NULL; 1264 opregion->vbt = NULL; 1265 opregion->lid_state = NULL; 1266 } 1267