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/drmP.h> 34 #include <drm/i915_drm.h> 35 #include "i915_drv.h" 36 #include "intel_drv.h" 37 38 #include <contrib/dev/acpica/source/include/acpi.h> 39 #include <contrib/dev/acpica/source/include/accommon.h> 40 #include <dev/acpica/acpivar.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 (1<<0) 53 #define MBOX_SWSCI (1<<1) 54 #define MBOX_ASLE (1<<2) 55 #define MBOX_ASLE_EXT (1<<4) 56 57 struct opregion_header { 58 u8 signature[16]; 59 u32 size; 60 u32 opregion_ver; 61 u8 bios_ver[32]; 62 u8 vbios_ver[16]; 63 u8 driver_ver[16]; 64 u32 mboxes; 65 u32 driver_model; 66 u32 pcon; 67 u8 dver[32]; 68 u8 rsvd[124]; 69 } __packed; 70 71 /* OpRegion mailbox #1: public ACPI methods */ 72 struct opregion_acpi { 73 u32 drdy; /* driver readiness */ 74 u32 csts; /* notification status */ 75 u32 cevt; /* current event */ 76 u8 rsvd1[20]; 77 u32 didl[8]; /* supported display devices ID list */ 78 u32 cpdl[8]; /* currently presented display list */ 79 u32 cadl[8]; /* currently active display list */ 80 u32 nadl[8]; /* next active devices list */ 81 u32 aslp; /* ASL sleep time-out */ 82 u32 tidx; /* toggle table index */ 83 u32 chpd; /* current hotplug enable indicator */ 84 u32 clid; /* current lid state*/ 85 u32 cdck; /* current docking state */ 86 u32 sxsw; /* Sx state resume */ 87 u32 evts; /* ASL supported events */ 88 u32 cnot; /* current OS notification */ 89 u32 nrdy; /* driver status */ 90 u32 did2[7]; /* extended supported display devices ID list */ 91 u32 cpd2[7]; /* extended attached display devices list */ 92 u8 rsvd2[4]; 93 } __packed; 94 95 /* OpRegion mailbox #2: SWSCI */ 96 struct opregion_swsci { 97 u32 scic; /* SWSCI command|status|data */ 98 u32 parm; /* command parameters */ 99 u32 dslp; /* driver sleep time-out */ 100 u8 rsvd[244]; 101 } __packed; 102 103 /* OpRegion mailbox #3: ASLE */ 104 struct opregion_asle { 105 u32 ardy; /* driver readiness */ 106 u32 aslc; /* ASLE interrupt command */ 107 u32 tche; /* technology enabled indicator */ 108 u32 alsi; /* current ALS illuminance reading */ 109 u32 bclp; /* backlight brightness to set */ 110 u32 pfit; /* panel fitting state */ 111 u32 cblv; /* current brightness level */ 112 u16 bclm[20]; /* backlight level duty cycle mapping table */ 113 u32 cpfm; /* current panel fitting mode */ 114 u32 epfm; /* enabled panel fitting modes */ 115 u8 plut[74]; /* panel LUT and identifier */ 116 u32 pfmb; /* PWM freq and min brightness */ 117 u32 cddv; /* color correction default values */ 118 u32 pcft; /* power conservation features */ 119 u32 srot; /* supported rotation angles */ 120 u32 iuer; /* IUER events */ 121 u64 fdss; 122 u32 fdsp; 123 u32 stat; 124 u64 rvda; /* Physical address of raw vbt data */ 125 u32 rvds; /* Size of raw vbt data */ 126 u8 rsvd[58]; 127 } __packed; 128 129 /* OpRegion mailbox #5: ASLE ext */ 130 struct opregion_asle_ext { 131 u32 phed; /* Panel Header */ 132 u8 bddc[256]; /* Panel EDID */ 133 u8 rsvd[764]; 134 } __packed; 135 136 /* Driver readiness indicator */ 137 #define ASLE_ARDY_READY (1 << 0) 138 #define ASLE_ARDY_NOT_READY (0 << 0) 139 140 /* ASLE Interrupt Command (ASLC) bits */ 141 #define ASLC_SET_ALS_ILLUM (1 << 0) 142 #define ASLC_SET_BACKLIGHT (1 << 1) 143 #define ASLC_SET_PFIT (1 << 2) 144 #define ASLC_SET_PWM_FREQ (1 << 3) 145 #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4) 146 #define ASLC_BUTTON_ARRAY (1 << 5) 147 #define ASLC_CONVERTIBLE_INDICATOR (1 << 6) 148 #define ASLC_DOCKING_INDICATOR (1 << 7) 149 #define ASLC_ISCT_STATE_CHANGE (1 << 8) 150 #define ASLC_REQ_MSK 0x1ff 151 /* response bits */ 152 #define ASLC_ALS_ILLUM_FAILED (1 << 10) 153 #define ASLC_BACKLIGHT_FAILED (1 << 12) 154 #define ASLC_PFIT_FAILED (1 << 14) 155 #define ASLC_PWM_FREQ_FAILED (1 << 16) 156 #define ASLC_ROTATION_ANGLES_FAILED (1 << 18) 157 #define ASLC_BUTTON_ARRAY_FAILED (1 << 20) 158 #define ASLC_CONVERTIBLE_FAILED (1 << 22) 159 #define ASLC_DOCKING_FAILED (1 << 24) 160 #define ASLC_ISCT_STATE_FAILED (1 << 26) 161 162 /* Technology enabled indicator */ 163 #define ASLE_TCHE_ALS_EN (1 << 0) 164 #define ASLE_TCHE_BLC_EN (1 << 1) 165 #define ASLE_TCHE_PFIT_EN (1 << 2) 166 #define ASLE_TCHE_PFMB_EN (1 << 3) 167 168 /* ASLE backlight brightness to set */ 169 #define ASLE_BCLP_VALID (1<<31) 170 #define ASLE_BCLP_MSK (~(1<<31)) 171 172 /* ASLE panel fitting request */ 173 #define ASLE_PFIT_VALID (1<<31) 174 #define ASLE_PFIT_CENTER (1<<0) 175 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 176 #define ASLE_PFIT_STRETCH_GFX (1<<2) 177 178 /* PWM frequency and minimum brightness */ 179 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 180 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 181 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 182 #define ASLE_PFMB_PWM_VALID (1<<31) 183 184 #define ASLE_CBLV_VALID (1<<31) 185 186 /* IUER */ 187 #define ASLE_IUER_DOCKING (1 << 7) 188 #define ASLE_IUER_CONVERTIBLE (1 << 6) 189 #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4) 190 #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3) 191 #define ASLE_IUER_VOLUME_UP_BTN (1 << 2) 192 #define ASLE_IUER_WINDOWS_BTN (1 << 1) 193 #define ASLE_IUER_POWER_BTN (1 << 0) 194 195 /* Software System Control Interrupt (SWSCI) */ 196 #define SWSCI_SCIC_INDICATOR (1 << 0) 197 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 198 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1) 199 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8 200 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8) 201 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8 202 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8) 203 #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5 204 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5) 205 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1 206 207 #define SWSCI_FUNCTION_CODE(main, sub) \ 208 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \ 209 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT) 210 211 /* SWSCI: Get BIOS Data (GBDA) */ 212 #define SWSCI_GBDA 4 213 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0) 214 #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1) 215 #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4) 216 #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5) 217 #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6) 218 #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7) 219 #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10) 220 221 /* SWSCI: System BIOS Callbacks (SBCB) */ 222 #define SWSCI_SBCB 6 223 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0) 224 #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1) 225 #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3) 226 #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4) 227 #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5) 228 #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6) 229 #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7) 230 #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8) 231 #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9) 232 #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10) 233 #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11) 234 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16) 235 #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17) 236 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18) 237 #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19) 238 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21) 239 240 /* 241 * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices 242 * Attached to the Display Adapter). 243 */ 244 #define ACPI_DISPLAY_INDEX_SHIFT 0 245 #define ACPI_DISPLAY_INDEX_MASK (0xf << 0) 246 #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4 247 #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4) 248 #define ACPI_DISPLAY_TYPE_SHIFT 8 249 #define ACPI_DISPLAY_TYPE_MASK (0xf << 8) 250 #define ACPI_DISPLAY_TYPE_OTHER (0 << 8) 251 #define ACPI_DISPLAY_TYPE_VGA (1 << 8) 252 #define ACPI_DISPLAY_TYPE_TV (2 << 8) 253 #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8) 254 #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8) 255 #define ACPI_VENDOR_SPECIFIC_SHIFT 12 256 #define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12) 257 #define ACPI_BIOS_CAN_DETECT (1 << 16) 258 #define ACPI_DEPENDS_ON_VGA (1 << 17) 259 #define ACPI_PIPE_ID_SHIFT 18 260 #define ACPI_PIPE_ID_MASK (7 << 18) 261 #define ACPI_DEVICE_ID_SCHEME (1 << 31) 262 263 #define MAX_DSLP 1500 264 265 static int swsci(struct drm_i915_private *dev_priv, 266 u32 function, u32 parm, u32 *parm_out) 267 { 268 struct opregion_swsci *swsci = dev_priv->opregion.swsci; 269 struct pci_dev *pdev = dev_priv->drm.pdev; 270 u32 main_function, sub_function, scic; 271 u16 swsci_val; 272 u32 dslp; 273 274 if (!swsci) 275 return -ENODEV; 276 277 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> 278 SWSCI_SCIC_MAIN_FUNCTION_SHIFT; 279 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> 280 SWSCI_SCIC_SUB_FUNCTION_SHIFT; 281 282 /* Check if we can call the function. See swsci_setup for details. */ 283 if (main_function == SWSCI_SBCB) { 284 if ((dev_priv->opregion.swsci_sbcb_sub_functions & 285 (1 << sub_function)) == 0) 286 return -EINVAL; 287 } else if (main_function == SWSCI_GBDA) { 288 if ((dev_priv->opregion.swsci_gbda_sub_functions & 289 (1 << sub_function)) == 0) 290 return -EINVAL; 291 } 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_DEBUG_DRIVER("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_DEBUG_DRIVER("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_DEBUG_DRIVER("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; 366 367 /* don't care about old stuff for now */ 368 if (!HAS_DDI(dev_priv)) 369 return 0; 370 371 if (intel_encoder->type == INTEL_OUTPUT_DSI) 372 port = 0; 373 else 374 port = intel_ddi_get_encoder_port(intel_encoder); 375 376 if (port == PORT_E) { 377 port = 0; 378 } else { 379 parm |= 1 << port; 380 port++; 381 } 382 383 if (!enable) 384 parm |= 4 << 8; 385 386 switch (intel_encoder->type) { 387 case INTEL_OUTPUT_ANALOG: 388 type = DISPLAY_TYPE_CRT; 389 break; 390 case INTEL_OUTPUT_UNKNOWN: 391 case INTEL_OUTPUT_DP: 392 case INTEL_OUTPUT_HDMI: 393 case INTEL_OUTPUT_DP_MST: 394 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; 395 break; 396 case INTEL_OUTPUT_EDP: 397 case INTEL_OUTPUT_DSI: 398 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; 399 break; 400 default: 401 WARN_ONCE(1, "unsupported intel_encoder type %d\n", 402 intel_encoder->type); 403 return -EINVAL; 404 } 405 406 parm |= type << (16 + port * 3); 407 408 return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); 409 } 410 411 static const struct { 412 pci_power_t pci_power_state; 413 u32 parm; 414 } power_state_map[] = { 415 { PCI_D0, 0x00 }, 416 { PCI_D1, 0x01 }, 417 { PCI_D2, 0x02 }, 418 { PCI_D3hot, 0x04 }, 419 { PCI_D3cold, 0x04 }, 420 }; 421 422 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv, 423 pci_power_t state) 424 { 425 int i; 426 427 if (!HAS_DDI(dev_priv)) 428 return 0; 429 430 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { 431 if (state == power_state_map[i].pci_power_state) 432 return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE, 433 power_state_map[i].parm, NULL); 434 } 435 436 return -EINVAL; 437 } 438 439 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp) 440 { 441 struct intel_connector *connector; 442 struct drm_connector_list_iter conn_iter; 443 struct opregion_asle *asle = dev_priv->opregion.asle; 444 struct drm_device *dev = &dev_priv->drm; 445 446 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); 447 448 #ifndef __DragonFly__ 449 if (acpi_video_get_backlight_type() == acpi_backlight_native) { 450 DRM_DEBUG_KMS("opregion backlight request ignored\n"); 451 return 0; 452 } 453 #endif 454 455 if (!(bclp & ASLE_BCLP_VALID)) 456 return ASLC_BACKLIGHT_FAILED; 457 458 bclp &= ASLE_BCLP_MSK; 459 if (bclp > 255) 460 return ASLC_BACKLIGHT_FAILED; 461 462 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 463 464 /* 465 * Update backlight on all connectors that support backlight (usually 466 * only one). 467 */ 468 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp); 469 drm_connector_list_iter_begin(dev, &conn_iter); 470 for_each_intel_connector_iter(connector, &conn_iter) 471 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255); 472 drm_connector_list_iter_end(&conn_iter); 473 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID; 474 475 drm_modeset_unlock(&dev->mode_config.connection_mutex); 476 477 478 return 0; 479 } 480 481 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi) 482 { 483 /* alsi is the current ALS reading in lux. 0 indicates below sensor 484 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 485 DRM_DEBUG_DRIVER("Illum is not supported\n"); 486 return ASLC_ALS_ILLUM_FAILED; 487 } 488 489 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb) 490 { 491 DRM_DEBUG_DRIVER("PWM freq is not supported\n"); 492 return ASLC_PWM_FREQ_FAILED; 493 } 494 495 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit) 496 { 497 /* Panel fitting is currently controlled by the X code, so this is a 498 noop until modesetting support works fully */ 499 DRM_DEBUG_DRIVER("Pfit is not supported\n"); 500 return ASLC_PFIT_FAILED; 501 } 502 503 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot) 504 { 505 DRM_DEBUG_DRIVER("SROT is not supported\n"); 506 return ASLC_ROTATION_ANGLES_FAILED; 507 } 508 509 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer) 510 { 511 if (!iuer) 512 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n"); 513 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 514 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n"); 515 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 516 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n"); 517 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 518 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n"); 519 if (iuer & ASLE_IUER_WINDOWS_BTN) 520 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n"); 521 if (iuer & ASLE_IUER_POWER_BTN) 522 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n"); 523 524 return ASLC_BUTTON_ARRAY_FAILED; 525 } 526 527 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer) 528 { 529 if (iuer & ASLE_IUER_CONVERTIBLE) 530 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n"); 531 else 532 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n"); 533 534 return ASLC_CONVERTIBLE_FAILED; 535 } 536 537 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer) 538 { 539 if (iuer & ASLE_IUER_DOCKING) 540 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n"); 541 else 542 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n"); 543 544 return ASLC_DOCKING_FAILED; 545 } 546 547 static u32 asle_isct_state(struct drm_i915_private *dev_priv) 548 { 549 DRM_DEBUG_DRIVER("ISCT is not supported\n"); 550 return ASLC_ISCT_STATE_FAILED; 551 } 552 553 static void asle_work(struct work_struct *work) 554 { 555 struct intel_opregion *opregion = 556 container_of(work, struct intel_opregion, asle_work); 557 struct drm_i915_private *dev_priv = 558 container_of(opregion, struct drm_i915_private, opregion); 559 struct opregion_asle *asle = dev_priv->opregion.asle; 560 u32 aslc_stat = 0; 561 u32 aslc_req; 562 563 if (!asle) 564 return; 565 566 aslc_req = asle->aslc; 567 568 if (!(aslc_req & ASLC_REQ_MSK)) { 569 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n", 570 aslc_req); 571 return; 572 } 573 574 if (aslc_req & ASLC_SET_ALS_ILLUM) 575 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi); 576 577 if (aslc_req & ASLC_SET_BACKLIGHT) 578 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp); 579 580 if (aslc_req & ASLC_SET_PFIT) 581 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit); 582 583 if (aslc_req & ASLC_SET_PWM_FREQ) 584 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb); 585 586 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 587 aslc_stat |= asle_set_supported_rotation_angles(dev_priv, 588 asle->srot); 589 590 if (aslc_req & ASLC_BUTTON_ARRAY) 591 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer); 592 593 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 594 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer); 595 596 if (aslc_req & ASLC_DOCKING_INDICATOR) 597 aslc_stat |= asle_set_docking(dev_priv, asle->iuer); 598 599 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 600 aslc_stat |= asle_isct_state(dev_priv); 601 602 asle->aslc = aslc_stat; 603 } 604 605 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv) 606 { 607 if (dev_priv->opregion.asle) 608 schedule_work(&dev_priv->opregion.asle_work); 609 } 610 611 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 612 #define ACPI_EV_LID (1<<1) 613 #define ACPI_EV_DOCK (1<<2) 614 615 static struct intel_opregion *system_opregion; 616 617 #if 0 618 static int intel_opregion_video_event(struct notifier_block *nb, 619 unsigned long val, void *data) 620 { 621 /* The only video events relevant to opregion are 0x80. These indicate 622 either a docking event, lid switch or display switch request. In 623 Linux, these are handled by the dock, button and video drivers. 624 */ 625 626 struct acpi_bus_event *event = data; 627 struct opregion_acpi *acpi; 628 int ret = NOTIFY_OK; 629 630 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 631 return NOTIFY_DONE; 632 633 if (!system_opregion) 634 return NOTIFY_DONE; 635 636 acpi = system_opregion->acpi; 637 638 if (event->type == 0x80 && ((acpi->cevt & 1) == 0)) 639 ret = NOTIFY_BAD; 640 641 acpi->csts = 0; 642 643 return ret; 644 } 645 646 static struct notifier_block intel_opregion_notifier = { 647 .notifier_call = intel_opregion_video_event, 648 }; 649 #endif 650 651 /* 652 * Initialise the DIDL field in opregion. This passes a list of devices to 653 * the firmware. Values are defined by section B.4.2 of the ACPI specification 654 * (version 3) 655 */ 656 657 static void set_did(struct intel_opregion *opregion, int i, u32 val) 658 { 659 if (i < ARRAY_SIZE(opregion->acpi->didl)) { 660 opregion->acpi->didl[i] = val; 661 } else { 662 i -= ARRAY_SIZE(opregion->acpi->didl); 663 664 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) 665 return; 666 667 opregion->acpi->did2[i] = val; 668 } 669 } 670 671 static u32 acpi_display_type(struct intel_connector *connector) 672 { 673 u32 display_type; 674 675 switch (connector->base.connector_type) { 676 case DRM_MODE_CONNECTOR_VGA: 677 case DRM_MODE_CONNECTOR_DVIA: 678 display_type = ACPI_DISPLAY_TYPE_VGA; 679 break; 680 case DRM_MODE_CONNECTOR_Composite: 681 case DRM_MODE_CONNECTOR_SVIDEO: 682 case DRM_MODE_CONNECTOR_Component: 683 case DRM_MODE_CONNECTOR_9PinDIN: 684 case DRM_MODE_CONNECTOR_TV: 685 display_type = ACPI_DISPLAY_TYPE_TV; 686 break; 687 case DRM_MODE_CONNECTOR_DVII: 688 case DRM_MODE_CONNECTOR_DVID: 689 case DRM_MODE_CONNECTOR_DisplayPort: 690 case DRM_MODE_CONNECTOR_HDMIA: 691 case DRM_MODE_CONNECTOR_HDMIB: 692 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL; 693 break; 694 case DRM_MODE_CONNECTOR_LVDS: 695 case DRM_MODE_CONNECTOR_eDP: 696 case DRM_MODE_CONNECTOR_DSI: 697 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL; 698 break; 699 case DRM_MODE_CONNECTOR_Unknown: 700 case DRM_MODE_CONNECTOR_VIRTUAL: 701 display_type = ACPI_DISPLAY_TYPE_OTHER; 702 break; 703 default: 704 MISSING_CASE(connector->base.connector_type); 705 display_type = ACPI_DISPLAY_TYPE_OTHER; 706 break; 707 } 708 709 return display_type; 710 } 711 712 static void intel_didl_outputs(struct drm_i915_private *dev_priv) 713 { 714 struct intel_opregion *opregion = &dev_priv->opregion; 715 struct intel_connector *connector; 716 struct drm_connector_list_iter conn_iter; 717 int i = 0, max_outputs; 718 int display_index[16] = {}; 719 720 /* 721 * In theory, did2, the extended didl, gets added at opregion version 722 * 3.0. In practice, however, we're supposed to set it for earlier 723 * versions as well, since a BIOS that doesn't understand did2 should 724 * not look at it anyway. Use a variable so we can tweak this if a need 725 * arises later. 726 */ 727 max_outputs = ARRAY_SIZE(opregion->acpi->didl) + 728 ARRAY_SIZE(opregion->acpi->did2); 729 730 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 731 for_each_intel_connector_iter(connector, &conn_iter) { 732 u32 device_id, type; 733 734 device_id = acpi_display_type(connector); 735 736 /* Use display type specific display index. */ 737 type = (device_id & ACPI_DISPLAY_TYPE_MASK) 738 >> ACPI_DISPLAY_TYPE_SHIFT; 739 device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT; 740 741 connector->acpi_device_id = device_id; 742 if (i < max_outputs) 743 set_did(opregion, i, device_id); 744 i++; 745 } 746 drm_connector_list_iter_end(&conn_iter); 747 748 DRM_DEBUG_KMS("%d outputs detected\n", i); 749 750 if (i > max_outputs) 751 DRM_ERROR("More than %d outputs in connector list\n", 752 max_outputs); 753 754 /* If fewer than max outputs, the list must be null terminated */ 755 if (i < max_outputs) 756 set_did(opregion, i, 0); 757 } 758 759 static void intel_setup_cadls(struct drm_i915_private *dev_priv) 760 { 761 struct intel_opregion *opregion = &dev_priv->opregion; 762 struct intel_connector *connector; 763 struct drm_connector_list_iter conn_iter; 764 int i = 0; 765 766 /* 767 * Initialize the CADL field from the connector device ids. This is 768 * essentially the same as copying from the DIDL. Technically, this is 769 * not always correct as display outputs may exist, but not active. This 770 * initialization is necessary for some Clevo laptops that check this 771 * field before processing the brightness and display switching hotkeys. 772 * 773 * Note that internal panels should be at the front of the connector 774 * list already, ensuring they're not left out. 775 */ 776 drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter); 777 for_each_intel_connector_iter(connector, &conn_iter) { 778 if (i >= ARRAY_SIZE(opregion->acpi->cadl)) 779 break; 780 opregion->acpi->cadl[i++] = connector->acpi_device_id; 781 } 782 drm_connector_list_iter_end(&conn_iter); 783 784 /* If fewer than 8 active devices, the list must be null terminated */ 785 if (i < ARRAY_SIZE(opregion->acpi->cadl)) 786 opregion->acpi->cadl[i] = 0; 787 } 788 789 void intel_opregion_register(struct drm_i915_private *dev_priv) 790 { 791 struct intel_opregion *opregion = &dev_priv->opregion; 792 793 if (!opregion->header) 794 return; 795 796 if (opregion->acpi) { 797 intel_didl_outputs(dev_priv); 798 intel_setup_cadls(dev_priv); 799 800 /* Notify BIOS we are ready to handle ACPI video ext notifs. 801 * Right now, all the events are handled by the ACPI video module. 802 * We don't actually need to do anything with them. */ 803 opregion->acpi->csts = 0; 804 opregion->acpi->drdy = 1; 805 806 system_opregion = opregion; 807 } 808 809 if (opregion->asle) { 810 opregion->asle->tche = ASLE_TCHE_BLC_EN; 811 opregion->asle->ardy = ASLE_ARDY_READY; 812 } 813 } 814 815 void intel_opregion_unregister(struct drm_i915_private *dev_priv) 816 { 817 struct intel_opregion *opregion = &dev_priv->opregion; 818 819 if (!opregion->header) 820 return; 821 822 if (opregion->asle) 823 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 824 825 cancel_work_sync(&dev_priv->opregion.asle_work); 826 827 if (opregion->acpi) { 828 opregion->acpi->drdy = 0; 829 830 system_opregion = NULL; 831 } 832 833 /* just clear all opregion memory pointers now */ 834 iounmap(opregion->header); 835 if (opregion->rvda) { 836 iounmap(opregion->rvda); 837 opregion->rvda = NULL; 838 } 839 if (opregion->vbt_firmware) { 840 kfree(opregion->vbt_firmware); 841 opregion->vbt_firmware = NULL; 842 } 843 opregion->header = NULL; 844 opregion->acpi = NULL; 845 opregion->swsci = NULL; 846 opregion->asle = NULL; 847 opregion->vbt = NULL; 848 opregion->lid_state = NULL; 849 } 850 851 static void swsci_setup(struct drm_i915_private *dev_priv) 852 { 853 struct intel_opregion *opregion = &dev_priv->opregion; 854 bool requested_callbacks = false; 855 u32 tmp; 856 857 /* Sub-function code 0 is okay, let's allow them. */ 858 opregion->swsci_gbda_sub_functions = 1; 859 opregion->swsci_sbcb_sub_functions = 1; 860 861 /* We use GBDA to ask for supported GBDA calls. */ 862 if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 863 /* make the bits match the sub-function codes */ 864 tmp <<= 1; 865 opregion->swsci_gbda_sub_functions |= tmp; 866 } 867 868 /* 869 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 870 * must not call interfaces that are not specifically requested by the 871 * bios. 872 */ 873 if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 874 /* here, the bits already match sub-function codes */ 875 opregion->swsci_sbcb_sub_functions |= tmp; 876 requested_callbacks = true; 877 } 878 879 /* 880 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 881 * the callback is _requested_. But we still can't call interfaces that 882 * are not requested. 883 */ 884 if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 885 /* make the bits match the sub-function codes */ 886 u32 low = tmp & 0x7ff; 887 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 888 tmp = (high << 4) | (low << 1) | 1; 889 890 /* best guess what to do with supported wrt requested */ 891 if (requested_callbacks) { 892 u32 req = opregion->swsci_sbcb_sub_functions; 893 if ((req & tmp) != req) 894 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp); 895 /* XXX: for now, trust the requested callbacks */ 896 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 897 } else { 898 opregion->swsci_sbcb_sub_functions |= tmp; 899 } 900 } 901 902 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 903 opregion->swsci_gbda_sub_functions, 904 opregion->swsci_sbcb_sub_functions); 905 } 906 907 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id) 908 { 909 DRM_DEBUG_KMS("Falling back to manually reading VBT from " 910 "VBIOS ROM for %s\n", id->ident); 911 return 1; 912 } 913 914 static const struct dmi_system_id intel_no_opregion_vbt[] = { 915 { 916 .callback = intel_no_opregion_vbt_callback, 917 .ident = "ThinkCentre A57", 918 .matches = { 919 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 920 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"), 921 }, 922 }, 923 { } 924 }; 925 926 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv) 927 { 928 struct intel_opregion *opregion = &dev_priv->opregion; 929 const struct firmware *fw = NULL; 930 const char *name = i915_modparams.vbt_firmware; 931 int ret; 932 933 if (!name || !*name) 934 return -ENOENT; 935 936 ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev); 937 if (ret) { 938 DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n", 939 name, ret); 940 return ret; 941 } 942 943 if (intel_bios_is_valid_vbt(fw->data, fw->datasize)) { 944 opregion->vbt_firmware = kmemdup(fw->data, fw->datasize, GFP_KERNEL); 945 if (opregion->vbt_firmware) { 946 DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name); 947 opregion->vbt = opregion->vbt_firmware; 948 opregion->vbt_size = fw->datasize; 949 ret = 0; 950 } else { 951 ret = -ENOMEM; 952 } 953 } else { 954 DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name); 955 ret = -EINVAL; 956 } 957 958 release_firmware(fw); 959 960 return ret; 961 } 962 963 int intel_opregion_setup(struct drm_i915_private *dev_priv) 964 { 965 struct intel_opregion *opregion = &dev_priv->opregion; 966 struct pci_dev *pdev = dev_priv->drm.pdev; 967 u32 asls, mboxes; 968 char buf[sizeof(OPREGION_SIGNATURE)]; 969 int err = 0; 970 void *base; 971 const void *vbt; 972 u32 vbt_size; 973 974 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); 975 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); 976 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); 977 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 978 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400); 979 980 pci_read_config_dword(pdev, ASLS, &asls); 981 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); 982 if (asls == 0) { 983 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n"); 984 return -ENOTSUPP; 985 } 986 987 INIT_WORK(&opregion->asle_work, asle_work); 988 989 base = (void *)pmap_mapbios(asls, OPREGION_SIZE); 990 if (!base) 991 return -ENOMEM; 992 993 memcpy(buf, base, sizeof(buf)); 994 995 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 996 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 997 err = -EINVAL; 998 goto err_out; 999 } 1000 opregion->header = base; 1001 opregion->lid_state = base + ACPI_CLID; 1002 1003 mboxes = opregion->header->mboxes; 1004 if (mboxes & MBOX_ACPI) { 1005 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 1006 opregion->acpi = base + OPREGION_ACPI_OFFSET; 1007 } 1008 1009 if (mboxes & MBOX_SWSCI) { 1010 DRM_DEBUG_DRIVER("SWSCI supported\n"); 1011 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 1012 swsci_setup(dev_priv); 1013 } 1014 1015 if (mboxes & MBOX_ASLE) { 1016 DRM_DEBUG_DRIVER("ASLE supported\n"); 1017 opregion->asle = base + OPREGION_ASLE_OFFSET; 1018 1019 opregion->asle->ardy = ASLE_ARDY_NOT_READY; 1020 } 1021 1022 if (mboxes & MBOX_ASLE_EXT) 1023 DRM_DEBUG_DRIVER("ASLE extension supported\n"); 1024 1025 if (intel_load_vbt_firmware(dev_priv) == 0) 1026 goto out; 1027 1028 if (dmi_check_system(intel_no_opregion_vbt)) 1029 goto out; 1030 1031 if (opregion->header->opregion_ver >= 2 && opregion->asle && 1032 opregion->asle->rvda && opregion->asle->rvds) { 1033 opregion->rvda = pmap_mapbios(opregion->asle->rvda, 1034 opregion->asle->rvds); 1035 vbt = opregion->rvda; 1036 vbt_size = opregion->asle->rvds; 1037 if (intel_bios_is_valid_vbt(vbt, vbt_size)) { 1038 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n"); 1039 opregion->vbt = vbt; 1040 opregion->vbt_size = vbt_size; 1041 goto out; 1042 } else { 1043 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n"); 1044 } 1045 } 1046 1047 vbt = base + OPREGION_VBT_OFFSET; 1048 /* 1049 * The VBT specification says that if the ASLE ext mailbox is not used 1050 * its area is reserved, but on some CHT boards the VBT extends into the 1051 * ASLE ext area. Allow this even though it is against the spec, so we 1052 * do not end up rejecting the VBT on those boards (and end up not 1053 * finding the LCD panel because of this). 1054 */ 1055 vbt_size = (mboxes & MBOX_ASLE_EXT) ? 1056 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE; 1057 vbt_size -= OPREGION_VBT_OFFSET; 1058 if (intel_bios_is_valid_vbt(vbt, vbt_size)) { 1059 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n"); 1060 opregion->vbt = vbt; 1061 opregion->vbt_size = vbt_size; 1062 } else { 1063 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n"); 1064 } 1065 1066 out: 1067 return 0; 1068 1069 err_out: 1070 iounmap(base); 1071 return err; 1072 } 1073 1074 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id) 1075 { 1076 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident); 1077 return 1; 1078 } 1079 1080 static const struct dmi_system_id intel_use_opregion_panel_type[] = { 1081 { 1082 .callback = intel_use_opregion_panel_type_callback, 1083 .ident = "Conrac GmbH IX45GM2", 1084 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"), 1085 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"), 1086 }, 1087 }, 1088 { } 1089 }; 1090 1091 int 1092 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv) 1093 { 1094 u32 panel_details; 1095 int ret; 1096 1097 ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details); 1098 if (ret) { 1099 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n", 1100 ret); 1101 return ret; 1102 } 1103 1104 ret = (panel_details >> 8) & 0xff; 1105 if (ret > 0x10) { 1106 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret); 1107 return -EINVAL; 1108 } 1109 1110 /* fall back to VBT panel type? */ 1111 if (ret == 0x0) { 1112 DRM_DEBUG_KMS("No panel type in OpRegion\n"); 1113 return -ENODEV; 1114 } 1115 1116 /* 1117 * So far we know that some machined must use it, others must not use it. 1118 * There doesn't seem to be any way to determine which way to go, except 1119 * via a quirk list :( 1120 */ 1121 if (!dmi_check_system(intel_use_opregion_panel_type)) { 1122 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1); 1123 return -ENODEV; 1124 } 1125 1126 return ret - 1; 1127 } 1128