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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 29 30#include <linux/acpi.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#define PCI_ASLE 0xe4 39#define PCI_ASLS 0xfc 40#define PCI_SWSCI 0xe8 41#define PCI_SWSCI_SCISEL (1 << 15) 42#define PCI_SWSCI_GSSCIE (1 << 0) 43 44#define OPREGION_HEADER_OFFSET 0 45#define OPREGION_ACPI_OFFSET 0x100 46#define ACPI_CLID 0x01ac /* current lid state indicator */ 47#define ACPI_CDCK 0x01b0 /* current docking state indicator */ 48#define OPREGION_SWSCI_OFFSET 0x200 49#define OPREGION_ASLE_OFFSET 0x300 50#define OPREGION_VBT_OFFSET 0x400 51 52#define OPREGION_SIGNATURE "IntelGraphicsMem" 53#define MBOX_ACPI (1<<0) 54#define MBOX_SWSCI (1<<1) 55#define MBOX_ASLE (1<<2) 56 57struct 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 u8 reserved[164]; 66} __packed; 67 68/* OpRegion mailbox #1: public ACPI methods */ 69struct opregion_acpi { 70 u32 drdy; /* driver readiness */ 71 u32 csts; /* notification status */ 72 u32 cevt; /* current event */ 73 u8 rsvd1[20]; 74 u32 didl[8]; /* supported display devices ID list */ 75 u32 cpdl[8]; /* currently presented display list */ 76 u32 cadl[8]; /* currently active display list */ 77 u32 nadl[8]; /* next active devices list */ 78 u32 aslp; /* ASL sleep time-out */ 79 u32 tidx; /* toggle table index */ 80 u32 chpd; /* current hotplug enable indicator */ 81 u32 clid; /* current lid state*/ 82 u32 cdck; /* current docking state */ 83 u32 sxsw; /* Sx state resume */ 84 u32 evts; /* ASL supported events */ 85 u32 cnot; /* current OS notification */ 86 u32 nrdy; /* driver status */ 87 u8 rsvd2[60]; 88} __packed; 89 90/* OpRegion mailbox #2: SWSCI */ 91struct opregion_swsci { 92 u32 scic; /* SWSCI command|status|data */ 93 u32 parm; /* command parameters */ 94 u32 dslp; /* driver sleep time-out */ 95 u8 rsvd[244]; 96} __packed; 97 98/* OpRegion mailbox #3: ASLE */ 99struct opregion_asle { 100 u32 ardy; /* driver readiness */ 101 u32 aslc; /* ASLE interrupt command */ 102 u32 tche; /* technology enabled indicator */ 103 u32 alsi; /* current ALS illuminance reading */ 104 u32 bclp; /* backlight brightness to set */ 105 u32 pfit; /* panel fitting state */ 106 u32 cblv; /* current brightness level */ 107 u16 bclm[20]; /* backlight level duty cycle mapping table */ 108 u32 cpfm; /* current panel fitting mode */ 109 u32 epfm; /* enabled panel fitting modes */ 110 u8 plut[74]; /* panel LUT and identifier */ 111 u32 pfmb; /* PWM freq and min brightness */ 112 u32 cddv; /* color correction default values */ 113 u32 pcft; /* power conservation features */ 114 u32 srot; /* supported rotation angles */ 115 u32 iuer; /* IUER events */ 116 u8 rsvd[86]; 117} __packed; 118 119/* Driver readiness indicator */ 120#define ASLE_ARDY_READY (1 << 0) 121#define ASLE_ARDY_NOT_READY (0 << 0) 122 123/* ASLE Interrupt Command (ASLC) bits */ 124#define ASLC_SET_ALS_ILLUM (1 << 0) 125#define ASLC_SET_BACKLIGHT (1 << 1) 126#define ASLC_SET_PFIT (1 << 2) 127#define ASLC_SET_PWM_FREQ (1 << 3) 128#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4) 129#define ASLC_BUTTON_ARRAY (1 << 5) 130#define ASLC_CONVERTIBLE_INDICATOR (1 << 6) 131#define ASLC_DOCKING_INDICATOR (1 << 7) 132#define ASLC_ISCT_STATE_CHANGE (1 << 8) 133#define ASLC_REQ_MSK 0x1ff 134/* response bits */ 135#define ASLC_ALS_ILLUM_FAILED (1 << 10) 136#define ASLC_BACKLIGHT_FAILED (1 << 12) 137#define ASLC_PFIT_FAILED (1 << 14) 138#define ASLC_PWM_FREQ_FAILED (1 << 16) 139#define ASLC_ROTATION_ANGLES_FAILED (1 << 18) 140#define ASLC_BUTTON_ARRAY_FAILED (1 << 20) 141#define ASLC_CONVERTIBLE_FAILED (1 << 22) 142#define ASLC_DOCKING_FAILED (1 << 24) 143#define ASLC_ISCT_STATE_FAILED (1 << 26) 144 145/* Technology enabled indicator */ 146#define ASLE_TCHE_ALS_EN (1 << 0) 147#define ASLE_TCHE_BLC_EN (1 << 1) 148#define ASLE_TCHE_PFIT_EN (1 << 2) 149#define ASLE_TCHE_PFMB_EN (1 << 3) 150 151/* ASLE backlight brightness to set */ 152#define ASLE_BCLP_VALID (1<<31) 153#define ASLE_BCLP_MSK (~(1<<31)) 154 155/* ASLE panel fitting request */ 156#define ASLE_PFIT_VALID (1<<31) 157#define ASLE_PFIT_CENTER (1<<0) 158#define ASLE_PFIT_STRETCH_TEXT (1<<1) 159#define ASLE_PFIT_STRETCH_GFX (1<<2) 160 161/* PWM frequency and minimum brightness */ 162#define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 163#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 164#define ASLE_PFMB_PWM_MASK (0x7ffffe00) 165#define ASLE_PFMB_PWM_VALID (1<<31) 166 167#define ASLE_CBLV_VALID (1<<31) 168 169/* IUER */ 170#define ASLE_IUER_DOCKING (1 << 7) 171#define ASLE_IUER_CONVERTIBLE (1 << 6) 172#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4) 173#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3) 174#define ASLE_IUER_VOLUME_UP_BTN (1 << 2) 175#define ASLE_IUER_WINDOWS_BTN (1 << 1) 176#define ASLE_IUER_POWER_BTN (1 << 0) 177 178/* Software System Control Interrupt (SWSCI) */ 179#define SWSCI_SCIC_INDICATOR (1 << 0) 180#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 181#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1) 182#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8 183#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8) 184#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8 185#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8) 186#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5 187#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5) 188#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1 189 190#define SWSCI_FUNCTION_CODE(main, sub) \ 191 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \ 192 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT) 193 194/* SWSCI: Get BIOS Data (GBDA) */ 195#define SWSCI_GBDA 4 196#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0) 197#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1) 198#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4) 199#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5) 200#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6) 201#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7) 202#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10) 203 204/* SWSCI: System BIOS Callbacks (SBCB) */ 205#define SWSCI_SBCB 6 206#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0) 207#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1) 208#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3) 209#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4) 210#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5) 211#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6) 212#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7) 213#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8) 214#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9) 215#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10) 216#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11) 217#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16) 218#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17) 219#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18) 220#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19) 221#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21) 222 223#define ACPI_OTHER_OUTPUT (0<<8) 224#define ACPI_VGA_OUTPUT (1<<8) 225#define ACPI_TV_OUTPUT (2<<8) 226#define ACPI_DIGITAL_OUTPUT (3<<8) 227#define ACPI_LVDS_OUTPUT (4<<8) 228 229#define MAX_DSLP 1500 230 231#ifdef CONFIG_ACPI 232static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out) 233{ 234 struct drm_i915_private *dev_priv = dev->dev_private; 235 struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci; 236 u32 main_function, sub_function, scic; 237 u16 pci_swsci; 238 u32 dslp; 239 240 if (!swsci) 241 return -ENODEV; 242 243 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> 244 SWSCI_SCIC_MAIN_FUNCTION_SHIFT; 245 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> 246 SWSCI_SCIC_SUB_FUNCTION_SHIFT; 247 248 /* Check if we can call the function. See swsci_setup for details. */ 249 if (main_function == SWSCI_SBCB) { 250 if ((dev_priv->opregion.swsci_sbcb_sub_functions & 251 (1 << sub_function)) == 0) 252 return -EINVAL; 253 } else if (main_function == SWSCI_GBDA) { 254 if ((dev_priv->opregion.swsci_gbda_sub_functions & 255 (1 << sub_function)) == 0) 256 return -EINVAL; 257 } 258 259 /* Driver sleep timeout in ms. */ 260 dslp = ioread32(&swsci->dslp); 261 if (!dslp) { 262 /* The spec says 2ms should be the default, but it's too small 263 * for some machines. */ 264 dslp = 50; 265 } else if (dslp > MAX_DSLP) { 266 /* Hey bios, trust must be earned. */ 267 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, " 268 "using %u ms instead\n", dslp, MAX_DSLP); 269 dslp = MAX_DSLP; 270 } 271 272 /* The spec tells us to do this, but we are the only user... */ 273 scic = ioread32(&swsci->scic); 274 if (scic & SWSCI_SCIC_INDICATOR) { 275 DRM_DEBUG_DRIVER("SWSCI request already in progress\n"); 276 return -EBUSY; 277 } 278 279 scic = function | SWSCI_SCIC_INDICATOR; 280 281 iowrite32(parm, &swsci->parm); 282 iowrite32(scic, &swsci->scic); 283 284 /* Ensure SCI event is selected and event trigger is cleared. */ 285 pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci); 286 if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) { 287 pci_swsci |= PCI_SWSCI_SCISEL; 288 pci_swsci &= ~PCI_SWSCI_GSSCIE; 289 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci); 290 } 291 292 /* Use event trigger to tell bios to check the mail. */ 293 pci_swsci |= PCI_SWSCI_GSSCIE; 294 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci); 295 296 /* Poll for the result. */ 297#define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0) 298 if (wait_for(C, dslp)) { 299 DRM_DEBUG_DRIVER("SWSCI request timed out\n"); 300 return -ETIMEDOUT; 301 } 302 303 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >> 304 SWSCI_SCIC_EXIT_STATUS_SHIFT; 305 306 /* Note: scic == 0 is an error! */ 307 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) { 308 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic); 309 return -EIO; 310 } 311 312 if (parm_out) 313 *parm_out = ioread32(&swsci->parm); 314 315 return 0; 316 317#undef C 318} 319 320#define DISPLAY_TYPE_CRT 0 321#define DISPLAY_TYPE_TV 1 322#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2 323#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3 324 325int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, 326 bool enable) 327{ 328 struct drm_device *dev = intel_encoder->base.dev; 329 u32 parm = 0; 330 u32 type = 0; 331 u32 port; 332 333 /* don't care about old stuff for now */ 334 if (!HAS_DDI(dev)) 335 return 0; 336 337 port = intel_ddi_get_encoder_port(intel_encoder); 338 if (port == PORT_E) { 339 port = 0; 340 } else { 341 parm |= 1 << port; 342 port++; 343 } 344 345 if (!enable) 346 parm |= 4 << 8; 347 348 switch (intel_encoder->type) { 349 case INTEL_OUTPUT_ANALOG: 350 type = DISPLAY_TYPE_CRT; 351 break; 352 case INTEL_OUTPUT_UNKNOWN: 353 case INTEL_OUTPUT_DISPLAYPORT: 354 case INTEL_OUTPUT_HDMI: 355 case INTEL_OUTPUT_DP_MST: 356 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; 357 break; 358 case INTEL_OUTPUT_EDP: 359 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; 360 break; 361 default: 362 WARN_ONCE(1, "unsupported intel_encoder type %d\n", 363 intel_encoder->type); 364 return -EINVAL; 365 } 366 367 parm |= type << (16 + port * 3); 368 369 return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); 370} 371 372static const struct { 373 pci_power_t pci_power_state; 374 u32 parm; 375} power_state_map[] = { 376 { PCI_D0, 0x00 }, 377 { PCI_D1, 0x01 }, 378 { PCI_D2, 0x02 }, 379 { PCI_D3hot, 0x04 }, 380 { PCI_D3cold, 0x04 }, 381}; 382 383int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) 384{ 385 int i; 386 387 if (!HAS_DDI(dev)) 388 return 0; 389 390 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { 391 if (state == power_state_map[i].pci_power_state) 392 return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE, 393 power_state_map[i].parm, NULL); 394 } 395 396 return -EINVAL; 397} 398 399/* 400 * If the vendor backlight interface is not in use and ACPI backlight interface 401 * is broken, do not bother processing backlight change requests from firmware. 402 */ 403static bool should_ignore_backlight_request(void) 404{ 405 return acpi_video_backlight_support() && 406 !acpi_video_verify_backlight_support(); 407} 408 409static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 410{ 411 struct drm_i915_private *dev_priv = dev->dev_private; 412 struct intel_connector *intel_connector; 413 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 414 415 DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); 416 417 if (should_ignore_backlight_request()) { 418 DRM_DEBUG_KMS("opregion backlight request ignored\n"); 419 return 0; 420 } 421 422 if (!(bclp & ASLE_BCLP_VALID)) 423 return ASLC_BACKLIGHT_FAILED; 424 425 bclp &= ASLE_BCLP_MSK; 426 if (bclp > 255) 427 return ASLC_BACKLIGHT_FAILED; 428 429 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 430 431 /* 432 * Update backlight on all connectors that support backlight (usually 433 * only one). 434 */ 435 DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp); 436 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) 437 intel_panel_set_backlight_acpi(intel_connector, bclp, 255); 438 iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv); 439 440 drm_modeset_unlock(&dev->mode_config.connection_mutex); 441 442 443 return 0; 444} 445 446static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) 447{ 448 /* alsi is the current ALS reading in lux. 0 indicates below sensor 449 range, 0xffff indicates above sensor range. 1-0xfffe are valid */ 450 DRM_DEBUG_DRIVER("Illum is not supported\n"); 451 return ASLC_ALS_ILLUM_FAILED; 452} 453 454static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) 455{ 456 DRM_DEBUG_DRIVER("PWM freq is not supported\n"); 457 return ASLC_PWM_FREQ_FAILED; 458} 459 460static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) 461{ 462 /* Panel fitting is currently controlled by the X code, so this is a 463 noop until modesetting support works fully */ 464 DRM_DEBUG_DRIVER("Pfit is not supported\n"); 465 return ASLC_PFIT_FAILED; 466} 467 468static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot) 469{ 470 DRM_DEBUG_DRIVER("SROT is not supported\n"); 471 return ASLC_ROTATION_ANGLES_FAILED; 472} 473 474static u32 asle_set_button_array(struct drm_device *dev, u32 iuer) 475{ 476 if (!iuer) 477 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n"); 478 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) 479 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n"); 480 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) 481 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n"); 482 if (iuer & ASLE_IUER_VOLUME_UP_BTN) 483 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n"); 484 if (iuer & ASLE_IUER_WINDOWS_BTN) 485 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n"); 486 if (iuer & ASLE_IUER_POWER_BTN) 487 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n"); 488 489 return ASLC_BUTTON_ARRAY_FAILED; 490} 491 492static u32 asle_set_convertible(struct drm_device *dev, u32 iuer) 493{ 494 if (iuer & ASLE_IUER_CONVERTIBLE) 495 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n"); 496 else 497 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n"); 498 499 return ASLC_CONVERTIBLE_FAILED; 500} 501 502static u32 asle_set_docking(struct drm_device *dev, u32 iuer) 503{ 504 if (iuer & ASLE_IUER_DOCKING) 505 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n"); 506 else 507 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n"); 508 509 return ASLC_DOCKING_FAILED; 510} 511 512static u32 asle_isct_state(struct drm_device *dev) 513{ 514 DRM_DEBUG_DRIVER("ISCT is not supported\n"); 515 return ASLC_ISCT_STATE_FAILED; 516} 517 518static void asle_work(struct work_struct *work) 519{ 520 struct intel_opregion *opregion = 521 container_of(work, struct intel_opregion, asle_work); 522 struct drm_i915_private *dev_priv = 523 container_of(opregion, struct drm_i915_private, opregion); 524 struct drm_device *dev = dev_priv->dev; 525 struct opregion_asle __iomem *asle = dev_priv->opregion.asle; 526 u32 aslc_stat = 0; 527 u32 aslc_req; 528 529 if (!asle) 530 return; 531 532 aslc_req = ioread32(&asle->aslc); 533 534 if (!(aslc_req & ASLC_REQ_MSK)) { 535 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n", 536 aslc_req); 537 return; 538 } 539 540 if (aslc_req & ASLC_SET_ALS_ILLUM) 541 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi)); 542 543 if (aslc_req & ASLC_SET_BACKLIGHT) 544 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp)); 545 546 if (aslc_req & ASLC_SET_PFIT) 547 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit)); 548 549 if (aslc_req & ASLC_SET_PWM_FREQ) 550 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb)); 551 552 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) 553 aslc_stat |= asle_set_supported_rotation_angles(dev, 554 ioread32(&asle->srot)); 555 556 if (aslc_req & ASLC_BUTTON_ARRAY) 557 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer)); 558 559 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) 560 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer)); 561 562 if (aslc_req & ASLC_DOCKING_INDICATOR) 563 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer)); 564 565 if (aslc_req & ASLC_ISCT_STATE_CHANGE) 566 aslc_stat |= asle_isct_state(dev); 567 568 iowrite32(aslc_stat, &asle->aslc); 569} 570 571void intel_opregion_asle_intr(struct drm_device *dev) 572{ 573 struct drm_i915_private *dev_priv = dev->dev_private; 574 575 if (dev_priv->opregion.asle) 576 schedule_work(&dev_priv->opregion.asle_work); 577} 578 579#define ACPI_EV_DISPLAY_SWITCH (1<<0) 580#define ACPI_EV_LID (1<<1) 581#define ACPI_EV_DOCK (1<<2) 582 583static struct intel_opregion *system_opregion; 584 585static int intel_opregion_video_event(struct notifier_block *nb, 586 unsigned long val, void *data) 587{ 588 /* The only video events relevant to opregion are 0x80. These indicate 589 either a docking event, lid switch or display switch request. In 590 Linux, these are handled by the dock, button and video drivers. 591 */ 592 593 struct opregion_acpi __iomem *acpi; 594 struct acpi_bus_event *event = data; 595 int ret = NOTIFY_OK; 596 597 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 598 return NOTIFY_DONE; 599 600 if (!system_opregion) 601 return NOTIFY_DONE; 602 603 acpi = system_opregion->acpi; 604 605 if (event->type == 0x80 && 606 (ioread32(&acpi->cevt) & 1) == 0) 607 ret = NOTIFY_BAD; 608 609 iowrite32(0, &acpi->csts); 610 611 return ret; 612} 613 614static struct notifier_block intel_opregion_notifier = { 615 .notifier_call = intel_opregion_video_event, 616}; 617 618/* 619 * Initialise the DIDL field in opregion. This passes a list of devices to 620 * the firmware. Values are defined by section B.4.2 of the ACPI specification 621 * (version 3) 622 */ 623 624static void intel_didl_outputs(struct drm_device *dev) 625{ 626 struct drm_i915_private *dev_priv = dev->dev_private; 627 struct intel_opregion *opregion = &dev_priv->opregion; 628 struct drm_connector *connector; 629 acpi_handle handle; 630 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL; 631 unsigned long long device_id; 632 acpi_status status; 633 u32 temp; 634 int i = 0; 635 636 handle = ACPI_HANDLE(&dev->pdev->dev); 637 if (!handle || acpi_bus_get_device(handle, &acpi_dev)) 638 return; 639 640 if (acpi_is_video_device(handle)) 641 acpi_video_bus = acpi_dev; 642 else { 643 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) { 644 if (acpi_is_video_device(acpi_cdev->handle)) { 645 acpi_video_bus = acpi_cdev; 646 break; 647 } 648 } 649 } 650 651 if (!acpi_video_bus) { 652 pr_warn("No ACPI video bus found\n"); 653 return; 654 } 655 656 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) { 657 if (i >= 8) { 658 dev_dbg(&dev->pdev->dev, 659 "More than 8 outputs detected via ACPI\n"); 660 return; 661 } 662 status = 663 acpi_evaluate_integer(acpi_cdev->handle, "_ADR", 664 NULL, &device_id); 665 if (ACPI_SUCCESS(status)) { 666 if (!device_id) 667 goto blind_set; 668 iowrite32((u32)(device_id & 0x0f0f), 669 &opregion->acpi->didl[i]); 670 i++; 671 } 672 } 673 674end: 675 /* If fewer than 8 outputs, the list must be null terminated */ 676 if (i < 8) 677 iowrite32(0, &opregion->acpi->didl[i]); 678 return; 679 680blind_set: 681 i = 0; 682 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 683 int output_type = ACPI_OTHER_OUTPUT; 684 if (i >= 8) { 685 dev_dbg(&dev->pdev->dev, 686 "More than 8 outputs in connector list\n"); 687 return; 688 } 689 switch (connector->connector_type) { 690 case DRM_MODE_CONNECTOR_VGA: 691 case DRM_MODE_CONNECTOR_DVIA: 692 output_type = ACPI_VGA_OUTPUT; 693 break; 694 case DRM_MODE_CONNECTOR_Composite: 695 case DRM_MODE_CONNECTOR_SVIDEO: 696 case DRM_MODE_CONNECTOR_Component: 697 case DRM_MODE_CONNECTOR_9PinDIN: 698 output_type = ACPI_TV_OUTPUT; 699 break; 700 case DRM_MODE_CONNECTOR_DVII: 701 case DRM_MODE_CONNECTOR_DVID: 702 case DRM_MODE_CONNECTOR_DisplayPort: 703 case DRM_MODE_CONNECTOR_HDMIA: 704 case DRM_MODE_CONNECTOR_HDMIB: 705 output_type = ACPI_DIGITAL_OUTPUT; 706 break; 707 case DRM_MODE_CONNECTOR_LVDS: 708 output_type = ACPI_LVDS_OUTPUT; 709 break; 710 } 711 temp = ioread32(&opregion->acpi->didl[i]); 712 iowrite32(temp | (1<<31) | output_type | i, 713 &opregion->acpi->didl[i]); 714 i++; 715 } 716 goto end; 717} 718 719static void intel_setup_cadls(struct drm_device *dev) 720{ 721 struct drm_i915_private *dev_priv = dev->dev_private; 722 struct intel_opregion *opregion = &dev_priv->opregion; 723 int i = 0; 724 u32 disp_id; 725 726 /* Initialize the CADL field by duplicating the DIDL values. 727 * Technically, this is not always correct as display outputs may exist, 728 * but not active. This initialization is necessary for some Clevo 729 * laptops that check this field before processing the brightness and 730 * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if 731 * there are less than eight devices. */ 732 do { 733 disp_id = ioread32(&opregion->acpi->didl[i]); 734 iowrite32(disp_id, &opregion->acpi->cadl[i]); 735 } while (++i < 8 && disp_id != 0); 736} 737 738void intel_opregion_init(struct drm_device *dev) 739{ 740 struct drm_i915_private *dev_priv = dev->dev_private; 741 struct intel_opregion *opregion = &dev_priv->opregion; 742 743 if (!opregion->header) 744 return; 745 746 if (opregion->acpi) { 747 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 748 intel_didl_outputs(dev); 749 intel_setup_cadls(dev); 750 } 751 752 /* Notify BIOS we are ready to handle ACPI video ext notifs. 753 * Right now, all the events are handled by the ACPI video module. 754 * We don't actually need to do anything with them. */ 755 iowrite32(0, &opregion->acpi->csts); 756 iowrite32(1, &opregion->acpi->drdy); 757 758 system_opregion = opregion; 759 register_acpi_notifier(&intel_opregion_notifier); 760 } 761 762 if (opregion->asle) { 763 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche); 764 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy); 765 } 766} 767 768void intel_opregion_fini(struct drm_device *dev) 769{ 770 struct drm_i915_private *dev_priv = dev->dev_private; 771 struct intel_opregion *opregion = &dev_priv->opregion; 772 773 if (!opregion->header) 774 return; 775 776 if (opregion->asle) 777 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy); 778 779 cancel_work_sync(&dev_priv->opregion.asle_work); 780 781 if (opregion->acpi) { 782 iowrite32(0, &opregion->acpi->drdy); 783 784 system_opregion = NULL; 785 unregister_acpi_notifier(&intel_opregion_notifier); 786 } 787 788 /* just clear all opregion memory pointers now */ 789 iounmap(opregion->header); 790 opregion->header = NULL; 791 opregion->acpi = NULL; 792 opregion->swsci = NULL; 793 opregion->asle = NULL; 794 opregion->vbt = NULL; 795 opregion->lid_state = NULL; 796} 797 798static void swsci_setup(struct drm_device *dev) 799{ 800 struct drm_i915_private *dev_priv = dev->dev_private; 801 struct intel_opregion *opregion = &dev_priv->opregion; 802 bool requested_callbacks = false; 803 u32 tmp; 804 805 /* Sub-function code 0 is okay, let's allow them. */ 806 opregion->swsci_gbda_sub_functions = 1; 807 opregion->swsci_sbcb_sub_functions = 1; 808 809 /* We use GBDA to ask for supported GBDA calls. */ 810 if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { 811 /* make the bits match the sub-function codes */ 812 tmp <<= 1; 813 opregion->swsci_gbda_sub_functions |= tmp; 814 } 815 816 /* 817 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver 818 * must not call interfaces that are not specifically requested by the 819 * bios. 820 */ 821 if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { 822 /* here, the bits already match sub-function codes */ 823 opregion->swsci_sbcb_sub_functions |= tmp; 824 requested_callbacks = true; 825 } 826 827 /* 828 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean 829 * the callback is _requested_. But we still can't call interfaces that 830 * are not requested. 831 */ 832 if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { 833 /* make the bits match the sub-function codes */ 834 u32 low = tmp & 0x7ff; 835 u32 high = tmp & ~0xfff; /* bit 11 is reserved */ 836 tmp = (high << 4) | (low << 1) | 1; 837 838 /* best guess what to do with supported wrt requested */ 839 if (requested_callbacks) { 840 u32 req = opregion->swsci_sbcb_sub_functions; 841 if ((req & tmp) != req) 842 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp); 843 /* XXX: for now, trust the requested callbacks */ 844 /* opregion->swsci_sbcb_sub_functions &= tmp; */ 845 } else { 846 opregion->swsci_sbcb_sub_functions |= tmp; 847 } 848 } 849 850 DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", 851 opregion->swsci_gbda_sub_functions, 852 opregion->swsci_sbcb_sub_functions); 853} 854#else /* CONFIG_ACPI */ 855static inline void swsci_setup(struct drm_device *dev) {} 856#endif /* CONFIG_ACPI */ 857 858int intel_opregion_setup(struct drm_device *dev) 859{ 860 struct drm_i915_private *dev_priv = dev->dev_private; 861 struct intel_opregion *opregion = &dev_priv->opregion; 862 void __iomem *base; 863 u32 asls, mboxes; 864 char buf[sizeof(OPREGION_SIGNATURE)]; 865 int err = 0; 866 867 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls); 868 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls); 869 if (asls == 0) { 870 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n"); 871 return -ENOTSUPP; 872 } 873 874#ifdef CONFIG_ACPI 875 INIT_WORK(&opregion->asle_work, asle_work); 876#endif 877 878 base = acpi_os_ioremap(asls, OPREGION_SIZE); 879 if (!base) 880 return -ENOMEM; 881 882 memcpy_fromio(buf, base, sizeof(buf)); 883 884 if (memcmp(buf, OPREGION_SIGNATURE, 16)) { 885 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 886 err = -EINVAL; 887 goto err_out; 888 } 889 opregion->header = base; 890 opregion->vbt = base + OPREGION_VBT_OFFSET; 891 892 opregion->lid_state = base + ACPI_CLID; 893 894 mboxes = ioread32(&opregion->header->mboxes); 895 if (mboxes & MBOX_ACPI) { 896 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 897 opregion->acpi = base + OPREGION_ACPI_OFFSET; 898 } 899 900 if (mboxes & MBOX_SWSCI) { 901 DRM_DEBUG_DRIVER("SWSCI supported\n"); 902 opregion->swsci = base + OPREGION_SWSCI_OFFSET; 903 swsci_setup(dev); 904 } 905 if (mboxes & MBOX_ASLE) { 906 DRM_DEBUG_DRIVER("ASLE supported\n"); 907 opregion->asle = base + OPREGION_ASLE_OFFSET; 908 909 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy); 910 } 911 912 return 0; 913 914err_out: 915 iounmap(base); 916 return err; 917} 918