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