1304 lines · c
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 obtaining6 * a copy of this software and associated documentation files (the7 * "Software"), to deal in the Software without restriction, including8 * without limitation the rights to use, copy, modify, merge, publish,9 * distribute, sub license, and/or sell copies of the Software, and to10 * permit persons to whom the Software is furnished to do so, subject to11 * the following conditions:12 *13 * The above copyright notice and this permission notice (including the14 * next paragraph) shall be included in all copies or substantial15 * 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 OF19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE24 * SOFTWARE.25 *26 */27 28#include <linux/acpi.h>29#include <linux/dmi.h>30#include <acpi/video.h>31 32#include <drm/drm_edid.h>33 34#include "i915_drv.h"35#include "intel_acpi.h"36#include "intel_backlight.h"37#include "intel_display_types.h"38#include "intel_opregion.h"39#include "intel_pci_config.h"40 41#define OPREGION_HEADER_OFFSET 042#define OPREGION_ACPI_OFFSET 0x10043#define ACPI_CLID 0x01ac /* current lid state indicator */44#define ACPI_CDCK 0x01b0 /* current docking state indicator */45#define OPREGION_SWSCI_OFFSET 0x20046#define OPREGION_ASLE_OFFSET 0x30047#define OPREGION_VBT_OFFSET 0x40048#define OPREGION_ASLE_EXT_OFFSET 0x1C0049 50#define OPREGION_SIGNATURE "IntelGraphicsMem"51#define MBOX_ACPI BIT(0) /* Mailbox #1 */52#define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */53#define MBOX_ASLE BIT(2) /* Mailbox #3 */54#define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */55#define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */56 57#define PCON_HEADLESS_SKU BIT(13)58 59struct opregion_header {60 u8 signature[16];61 u32 size;62 struct {63 u8 rsvd;64 u8 revision;65 u8 minor;66 u8 major;67 } __packed over;68 u8 bios_ver[32];69 u8 vbios_ver[16];70 u8 driver_ver[16];71 u32 mboxes;72 u32 driver_model;73 u32 pcon;74 u8 dver[32];75 u8 rsvd[124];76} __packed;77 78/* OpRegion mailbox #1: public ACPI methods */79struct opregion_acpi {80 u32 drdy; /* driver readiness */81 u32 csts; /* notification status */82 u32 cevt; /* current event */83 u8 rsvd1[20];84 u32 didl[8]; /* supported display devices ID list */85 u32 cpdl[8]; /* currently presented display list */86 u32 cadl[8]; /* currently active display list */87 u32 nadl[8]; /* next active devices list */88 u32 aslp; /* ASL sleep time-out */89 u32 tidx; /* toggle table index */90 u32 chpd; /* current hotplug enable indicator */91 u32 clid; /* current lid state*/92 u32 cdck; /* current docking state */93 u32 sxsw; /* Sx state resume */94 u32 evts; /* ASL supported events */95 u32 cnot; /* current OS notification */96 u32 nrdy; /* driver status */97 u32 did2[7]; /* extended supported display devices ID list */98 u32 cpd2[7]; /* extended attached display devices list */99 u8 rsvd2[4];100} __packed;101 102/* OpRegion mailbox #2: SWSCI */103struct opregion_swsci {104 u32 scic; /* SWSCI command|status|data */105 u32 parm; /* command parameters */106 u32 dslp; /* driver sleep time-out */107 u8 rsvd[244];108} __packed;109 110/* OpRegion mailbox #3: ASLE */111struct opregion_asle {112 u32 ardy; /* driver readiness */113 u32 aslc; /* ASLE interrupt command */114 u32 tche; /* technology enabled indicator */115 u32 alsi; /* current ALS illuminance reading */116 u32 bclp; /* backlight brightness to set */117 u32 pfit; /* panel fitting state */118 u32 cblv; /* current brightness level */119 u16 bclm[20]; /* backlight level duty cycle mapping table */120 u32 cpfm; /* current panel fitting mode */121 u32 epfm; /* enabled panel fitting modes */122 u8 plut[74]; /* panel LUT and identifier */123 u32 pfmb; /* PWM freq and min brightness */124 u32 cddv; /* color correction default values */125 u32 pcft; /* power conservation features */126 u32 srot; /* supported rotation angles */127 u32 iuer; /* IUER events */128 u64 fdss;129 u32 fdsp;130 u32 stat;131 u64 rvda; /* Physical (2.0) or relative from opregion (2.1+)132 * address of raw VBT data. */133 u32 rvds; /* Size of raw vbt data */134 u8 rsvd[58];135} __packed;136 137/* OpRegion mailbox #5: ASLE ext */138struct opregion_asle_ext {139 u32 phed; /* Panel Header */140 u8 bddc[256]; /* Panel EDID */141 u8 rsvd[764];142} __packed;143 144/* Driver readiness indicator */145#define ASLE_ARDY_READY (1 << 0)146#define ASLE_ARDY_NOT_READY (0 << 0)147 148/* ASLE Interrupt Command (ASLC) bits */149#define ASLC_SET_ALS_ILLUM (1 << 0)150#define ASLC_SET_BACKLIGHT (1 << 1)151#define ASLC_SET_PFIT (1 << 2)152#define ASLC_SET_PWM_FREQ (1 << 3)153#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)154#define ASLC_BUTTON_ARRAY (1 << 5)155#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)156#define ASLC_DOCKING_INDICATOR (1 << 7)157#define ASLC_ISCT_STATE_CHANGE (1 << 8)158#define ASLC_REQ_MSK 0x1ff159/* response bits */160#define ASLC_ALS_ILLUM_FAILED (1 << 10)161#define ASLC_BACKLIGHT_FAILED (1 << 12)162#define ASLC_PFIT_FAILED (1 << 14)163#define ASLC_PWM_FREQ_FAILED (1 << 16)164#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)165#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)166#define ASLC_CONVERTIBLE_FAILED (1 << 22)167#define ASLC_DOCKING_FAILED (1 << 24)168#define ASLC_ISCT_STATE_FAILED (1 << 26)169 170/* Technology enabled indicator */171#define ASLE_TCHE_ALS_EN (1 << 0)172#define ASLE_TCHE_BLC_EN (1 << 1)173#define ASLE_TCHE_PFIT_EN (1 << 2)174#define ASLE_TCHE_PFMB_EN (1 << 3)175 176/* ASLE backlight brightness to set */177#define ASLE_BCLP_VALID (1<<31)178#define ASLE_BCLP_MSK (~(1<<31))179 180/* ASLE panel fitting request */181#define ASLE_PFIT_VALID (1<<31)182#define ASLE_PFIT_CENTER (1<<0)183#define ASLE_PFIT_STRETCH_TEXT (1<<1)184#define ASLE_PFIT_STRETCH_GFX (1<<2)185 186/* PWM frequency and minimum brightness */187#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)188#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)189#define ASLE_PFMB_PWM_MASK (0x7ffffe00)190#define ASLE_PFMB_PWM_VALID (1<<31)191 192#define ASLE_CBLV_VALID (1<<31)193 194/* IUER */195#define ASLE_IUER_DOCKING (1 << 7)196#define ASLE_IUER_CONVERTIBLE (1 << 6)197#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)198#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)199#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)200#define ASLE_IUER_WINDOWS_BTN (1 << 1)201#define ASLE_IUER_POWER_BTN (1 << 0)202 203#define ASLE_PHED_EDID_VALID_MASK 0x3204 205/* Software System Control Interrupt (SWSCI) */206#define SWSCI_SCIC_INDICATOR (1 << 0)207#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1208#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)209#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8210#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)211#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8212#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)213#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5214#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)215#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1216 217#define SWSCI_FUNCTION_CODE(main, sub) \218 ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \219 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)220 221/* SWSCI: Get BIOS Data (GBDA) */222#define SWSCI_GBDA 4223#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)224#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)225#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)226#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)227#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)228#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)229#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)230 231/* SWSCI: System BIOS Callbacks (SBCB) */232#define SWSCI_SBCB 6233#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)234#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)235#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)236#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)237#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)238#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)239#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)240#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)241#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)242#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)243#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)244#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)245#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)246#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)247#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)248#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)249 250#define MAX_DSLP 1500251 252#define OPREGION_SIZE (8 * 1024)253 254struct intel_opregion {255 struct intel_display *display;256 257 struct opregion_header *header;258 struct opregion_acpi *acpi;259 struct opregion_swsci *swsci;260 u32 swsci_gbda_sub_functions;261 u32 swsci_sbcb_sub_functions;262 struct opregion_asle *asle;263 struct opregion_asle_ext *asle_ext;264 void *rvda;265 const void *vbt;266 u32 vbt_size;267 struct work_struct asle_work;268 struct notifier_block acpi_notifier;269};270 271static int check_swsci_function(struct intel_display *display, u32 function)272{273 struct intel_opregion *opregion = display->opregion;274 struct opregion_swsci *swsci;275 u32 main_function, sub_function;276 277 if (!opregion)278 return -ENODEV;279 280 swsci = opregion->swsci;281 if (!swsci)282 return -ENODEV;283 284 main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>285 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;286 sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>287 SWSCI_SCIC_SUB_FUNCTION_SHIFT;288 289 /* Check if we can call the function. See swsci_setup for details. */290 if (main_function == SWSCI_SBCB) {291 if ((opregion->swsci_sbcb_sub_functions &292 (1 << sub_function)) == 0)293 return -EINVAL;294 } else if (main_function == SWSCI_GBDA) {295 if ((opregion->swsci_gbda_sub_functions &296 (1 << sub_function)) == 0)297 return -EINVAL;298 }299 300 return 0;301}302 303static int swsci(struct intel_display *display,304 u32 function, u32 parm, u32 *parm_out)305{306 struct opregion_swsci *swsci;307 struct pci_dev *pdev = to_pci_dev(display->drm->dev);308 u32 scic, dslp;309 u16 swsci_val;310 int ret;311 312 ret = check_swsci_function(display, function);313 if (ret)314 return ret;315 316 swsci = display->opregion->swsci;317 318 /* Driver sleep timeout in ms. */319 dslp = swsci->dslp;320 if (!dslp) {321 /* The spec says 2ms should be the default, but it's too small322 * for some machines. */323 dslp = 50;324 } else if (dslp > MAX_DSLP) {325 /* Hey bios, trust must be earned. */326 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "327 "using %u ms instead\n", dslp, MAX_DSLP);328 dslp = MAX_DSLP;329 }330 331 /* The spec tells us to do this, but we are the only user... */332 scic = swsci->scic;333 if (scic & SWSCI_SCIC_INDICATOR) {334 drm_dbg(display->drm, "SWSCI request already in progress\n");335 return -EBUSY;336 }337 338 scic = function | SWSCI_SCIC_INDICATOR;339 340 swsci->parm = parm;341 swsci->scic = scic;342 343 /* Ensure SCI event is selected and event trigger is cleared. */344 pci_read_config_word(pdev, SWSCI, &swsci_val);345 if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {346 swsci_val |= SWSCI_SCISEL;347 swsci_val &= ~SWSCI_GSSCIE;348 pci_write_config_word(pdev, SWSCI, swsci_val);349 }350 351 /* Use event trigger to tell bios to check the mail. */352 swsci_val |= SWSCI_GSSCIE;353 pci_write_config_word(pdev, SWSCI, swsci_val);354 355 /* Poll for the result. */356#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)357 if (wait_for(C, dslp)) {358 drm_dbg(display->drm, "SWSCI request timed out\n");359 return -ETIMEDOUT;360 }361 362 scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>363 SWSCI_SCIC_EXIT_STATUS_SHIFT;364 365 /* Note: scic == 0 is an error! */366 if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {367 drm_dbg(display->drm, "SWSCI request error %u\n", scic);368 return -EIO;369 }370 371 if (parm_out)372 *parm_out = swsci->parm;373 374 return 0;375 376#undef C377}378 379#define DISPLAY_TYPE_CRT 0380#define DISPLAY_TYPE_TV 1381#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2382#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3383 384int intel_opregion_notify_encoder(struct intel_encoder *encoder,385 bool enable)386{387 struct intel_display *display = to_intel_display(encoder);388 u32 parm = 0;389 u32 type = 0;390 u32 port;391 int ret;392 393 /* don't care about old stuff for now */394 if (!HAS_DDI(display))395 return 0;396 397 /* Avoid port out of bounds checks if SWSCI isn't there. */398 ret = check_swsci_function(display, SWSCI_SBCB_DISPLAY_POWER_STATE);399 if (ret)400 return ret;401 402 if (encoder->type == INTEL_OUTPUT_DSI)403 port = 0;404 else405 port = encoder->port;406 407 if (port == PORT_E) {408 port = 0;409 } else {410 parm |= 1 << port;411 port++;412 }413 414 /*415 * The port numbering and mapping here is bizarre. The now-obsolete416 * swsci spec supports ports numbered [0..4]. Port E is handled as a417 * special case, but port F and beyond are not. The functionality is418 * supposed to be obsolete for new platforms. Just bail out if the port419 * number is out of bounds after mapping.420 */421 if (port > 4) {422 drm_dbg_kms(display->drm,423 "[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",424 encoder->base.base.id, encoder->base.name,425 port_name(encoder->port), port);426 return -EINVAL;427 }428 429 if (!enable)430 parm |= 4 << 8;431 432 switch (encoder->type) {433 case INTEL_OUTPUT_ANALOG:434 type = DISPLAY_TYPE_CRT;435 break;436 case INTEL_OUTPUT_DDI:437 case INTEL_OUTPUT_DP:438 case INTEL_OUTPUT_HDMI:439 case INTEL_OUTPUT_DP_MST:440 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;441 break;442 case INTEL_OUTPUT_EDP:443 case INTEL_OUTPUT_DSI:444 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;445 break;446 default:447 drm_WARN_ONCE(display->drm, 1,448 "unsupported intel_encoder type %d\n",449 encoder->type);450 return -EINVAL;451 }452 453 parm |= type << (16 + port * 3);454 455 return swsci(display, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);456}457 458static const struct {459 pci_power_t pci_power_state;460 u32 parm;461} power_state_map[] = {462 { PCI_D0, 0x00 },463 { PCI_D1, 0x01 },464 { PCI_D2, 0x02 },465 { PCI_D3hot, 0x04 },466 { PCI_D3cold, 0x04 },467};468 469int intel_opregion_notify_adapter(struct intel_display *display,470 pci_power_t state)471{472 int i;473 474 if (!HAS_DDI(display))475 return 0;476 477 for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {478 if (state == power_state_map[i].pci_power_state)479 return swsci(display, SWSCI_SBCB_ADAPTER_POWER_STATE,480 power_state_map[i].parm, NULL);481 }482 483 return -EINVAL;484}485 486static u32 asle_set_backlight(struct intel_display *display, u32 bclp)487{488 struct intel_connector *connector;489 struct drm_connector_list_iter conn_iter;490 struct opregion_asle *asle = display->opregion->asle;491 492 drm_dbg(display->drm, "bclp = 0x%08x\n", bclp);493 494 if (acpi_video_get_backlight_type() == acpi_backlight_native) {495 drm_dbg_kms(display->drm,496 "opregion backlight request ignored\n");497 return 0;498 }499 500 if (!(bclp & ASLE_BCLP_VALID))501 return ASLC_BACKLIGHT_FAILED;502 503 bclp &= ASLE_BCLP_MSK;504 if (bclp > 255)505 return ASLC_BACKLIGHT_FAILED;506 507 drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL);508 509 /*510 * Update backlight on all connectors that support backlight (usually511 * only one).512 */513 drm_dbg_kms(display->drm, "updating opregion backlight %d/255\n",514 bclp);515 drm_connector_list_iter_begin(display->drm, &conn_iter);516 for_each_intel_connector_iter(connector, &conn_iter)517 intel_backlight_set_acpi(connector->base.state, bclp, 255);518 drm_connector_list_iter_end(&conn_iter);519 asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;520 521 drm_modeset_unlock(&display->drm->mode_config.connection_mutex);522 523 524 return 0;525}526 527static u32 asle_set_als_illum(struct intel_display *display, u32 alsi)528{529 /* alsi is the current ALS reading in lux. 0 indicates below sensor530 range, 0xffff indicates above sensor range. 1-0xfffe are valid */531 drm_dbg(display->drm, "Illum is not supported\n");532 return ASLC_ALS_ILLUM_FAILED;533}534 535static u32 asle_set_pwm_freq(struct intel_display *display, u32 pfmb)536{537 drm_dbg(display->drm, "PWM freq is not supported\n");538 return ASLC_PWM_FREQ_FAILED;539}540 541static u32 asle_set_pfit(struct intel_display *display, u32 pfit)542{543 /* Panel fitting is currently controlled by the X code, so this is a544 noop until modesetting support works fully */545 drm_dbg(display->drm, "Pfit is not supported\n");546 return ASLC_PFIT_FAILED;547}548 549static u32 asle_set_supported_rotation_angles(struct intel_display *display, u32 srot)550{551 drm_dbg(display->drm, "SROT is not supported\n");552 return ASLC_ROTATION_ANGLES_FAILED;553}554 555static u32 asle_set_button_array(struct intel_display *display, u32 iuer)556{557 if (!iuer)558 drm_dbg(display->drm,559 "Button array event is not supported (nothing)\n");560 if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)561 drm_dbg(display->drm,562 "Button array event is not supported (rotation lock)\n");563 if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)564 drm_dbg(display->drm,565 "Button array event is not supported (volume down)\n");566 if (iuer & ASLE_IUER_VOLUME_UP_BTN)567 drm_dbg(display->drm,568 "Button array event is not supported (volume up)\n");569 if (iuer & ASLE_IUER_WINDOWS_BTN)570 drm_dbg(display->drm,571 "Button array event is not supported (windows)\n");572 if (iuer & ASLE_IUER_POWER_BTN)573 drm_dbg(display->drm,574 "Button array event is not supported (power)\n");575 576 return ASLC_BUTTON_ARRAY_FAILED;577}578 579static u32 asle_set_convertible(struct intel_display *display, u32 iuer)580{581 if (iuer & ASLE_IUER_CONVERTIBLE)582 drm_dbg(display->drm,583 "Convertible is not supported (clamshell)\n");584 else585 drm_dbg(display->drm,586 "Convertible is not supported (slate)\n");587 588 return ASLC_CONVERTIBLE_FAILED;589}590 591static u32 asle_set_docking(struct intel_display *display, u32 iuer)592{593 if (iuer & ASLE_IUER_DOCKING)594 drm_dbg(display->drm, "Docking is not supported (docked)\n");595 else596 drm_dbg(display->drm,597 "Docking is not supported (undocked)\n");598 599 return ASLC_DOCKING_FAILED;600}601 602static u32 asle_isct_state(struct intel_display *display)603{604 drm_dbg(display->drm, "ISCT is not supported\n");605 return ASLC_ISCT_STATE_FAILED;606}607 608static void asle_work(struct work_struct *work)609{610 struct intel_opregion *opregion =611 container_of(work, struct intel_opregion, asle_work);612 struct intel_display *display = opregion->display;613 struct opregion_asle *asle = opregion->asle;614 u32 aslc_stat = 0;615 u32 aslc_req;616 617 if (!asle)618 return;619 620 aslc_req = asle->aslc;621 622 if (!(aslc_req & ASLC_REQ_MSK)) {623 drm_dbg(display->drm,624 "No request on ASLC interrupt 0x%08x\n", aslc_req);625 return;626 }627 628 if (aslc_req & ASLC_SET_ALS_ILLUM)629 aslc_stat |= asle_set_als_illum(display, asle->alsi);630 631 if (aslc_req & ASLC_SET_BACKLIGHT)632 aslc_stat |= asle_set_backlight(display, asle->bclp);633 634 if (aslc_req & ASLC_SET_PFIT)635 aslc_stat |= asle_set_pfit(display, asle->pfit);636 637 if (aslc_req & ASLC_SET_PWM_FREQ)638 aslc_stat |= asle_set_pwm_freq(display, asle->pfmb);639 640 if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)641 aslc_stat |= asle_set_supported_rotation_angles(display,642 asle->srot);643 644 if (aslc_req & ASLC_BUTTON_ARRAY)645 aslc_stat |= asle_set_button_array(display, asle->iuer);646 647 if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)648 aslc_stat |= asle_set_convertible(display, asle->iuer);649 650 if (aslc_req & ASLC_DOCKING_INDICATOR)651 aslc_stat |= asle_set_docking(display, asle->iuer);652 653 if (aslc_req & ASLC_ISCT_STATE_CHANGE)654 aslc_stat |= asle_isct_state(display);655 656 asle->aslc = aslc_stat;657}658 659bool intel_opregion_asle_present(struct intel_display *display)660{661 return display->opregion && display->opregion->asle;662}663 664void intel_opregion_asle_intr(struct intel_display *display)665{666 struct drm_i915_private *i915 = to_i915(display->drm);667 struct intel_opregion *opregion = display->opregion;668 669 if (opregion && opregion->asle)670 queue_work(i915->unordered_wq, &opregion->asle_work);671}672 673#define ACPI_EV_DISPLAY_SWITCH (1<<0)674#define ACPI_EV_LID (1<<1)675#define ACPI_EV_DOCK (1<<2)676 677/*678 * The only video events relevant to opregion are 0x80. These indicate either a679 * docking event, lid switch or display switch request. In Linux, these are680 * handled by the dock, button and video drivers.681 */682static int intel_opregion_video_event(struct notifier_block *nb,683 unsigned long val, void *data)684{685 struct intel_opregion *opregion = container_of(nb, struct intel_opregion,686 acpi_notifier);687 struct acpi_bus_event *event = data;688 struct opregion_acpi *acpi;689 int ret = NOTIFY_OK;690 691 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)692 return NOTIFY_DONE;693 694 acpi = opregion->acpi;695 696 if (event->type == 0x80 && ((acpi->cevt & 1) == 0))697 ret = NOTIFY_BAD;698 699 acpi->csts = 0;700 701 return ret;702}703 704/*705 * Initialise the DIDL field in opregion. This passes a list of devices to706 * the firmware. Values are defined by section B.4.2 of the ACPI specification707 * (version 3)708 */709 710static void set_did(struct intel_opregion *opregion, int i, u32 val)711{712 if (i < ARRAY_SIZE(opregion->acpi->didl)) {713 opregion->acpi->didl[i] = val;714 } else {715 i -= ARRAY_SIZE(opregion->acpi->didl);716 717 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))718 return;719 720 opregion->acpi->did2[i] = val;721 }722}723 724static void intel_didl_outputs(struct intel_display *display)725{726 struct intel_opregion *opregion = display->opregion;727 struct intel_connector *connector;728 struct drm_connector_list_iter conn_iter;729 int i = 0, max_outputs;730 731 /*732 * In theory, did2, the extended didl, gets added at opregion version733 * 3.0. In practice, however, we're supposed to set it for earlier734 * versions as well, since a BIOS that doesn't understand did2 should735 * not look at it anyway. Use a variable so we can tweak this if a need736 * arises later.737 */738 max_outputs = ARRAY_SIZE(opregion->acpi->didl) +739 ARRAY_SIZE(opregion->acpi->did2);740 741 intel_acpi_device_id_update(display);742 743 drm_connector_list_iter_begin(display->drm, &conn_iter);744 for_each_intel_connector_iter(connector, &conn_iter) {745 if (i < max_outputs)746 set_did(opregion, i, connector->acpi_device_id);747 i++;748 }749 drm_connector_list_iter_end(&conn_iter);750 751 drm_dbg_kms(display->drm, "%d outputs detected\n", i);752 753 if (i > max_outputs)754 drm_err(display->drm,755 "More than %d outputs in connector list\n",756 max_outputs);757 758 /* If fewer than max outputs, the list must be null terminated */759 if (i < max_outputs)760 set_did(opregion, i, 0);761}762 763static void intel_setup_cadls(struct intel_display *display)764{765 struct intel_opregion *opregion = display->opregion;766 struct intel_connector *connector;767 struct drm_connector_list_iter conn_iter;768 int i = 0;769 770 /*771 * Initialize the CADL field from the connector device ids. This is772 * essentially the same as copying from the DIDL. Technically, this is773 * not always correct as display outputs may exist, but not active. This774 * initialization is necessary for some Clevo laptops that check this775 * field before processing the brightness and display switching hotkeys.776 *777 * Note that internal panels should be at the front of the connector778 * list already, ensuring they're not left out.779 */780 drm_connector_list_iter_begin(display->drm, &conn_iter);781 for_each_intel_connector_iter(connector, &conn_iter) {782 if (i >= ARRAY_SIZE(opregion->acpi->cadl))783 break;784 opregion->acpi->cadl[i++] = connector->acpi_device_id;785 }786 drm_connector_list_iter_end(&conn_iter);787 788 /* If fewer than 8 active devices, the list must be null terminated */789 if (i < ARRAY_SIZE(opregion->acpi->cadl))790 opregion->acpi->cadl[i] = 0;791}792 793static void swsci_setup(struct intel_display *display)794{795 struct intel_opregion *opregion = display->opregion;796 bool requested_callbacks = false;797 u32 tmp;798 799 /* Sub-function code 0 is okay, let's allow them. */800 opregion->swsci_gbda_sub_functions = 1;801 opregion->swsci_sbcb_sub_functions = 1;802 803 /* We use GBDA to ask for supported GBDA calls. */804 if (swsci(display, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {805 /* make the bits match the sub-function codes */806 tmp <<= 1;807 opregion->swsci_gbda_sub_functions |= tmp;808 }809 810 /*811 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver812 * must not call interfaces that are not specifically requested by the813 * bios.814 */815 if (swsci(display, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {816 /* here, the bits already match sub-function codes */817 opregion->swsci_sbcb_sub_functions |= tmp;818 requested_callbacks = true;819 }820 821 /*822 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean823 * the callback is _requested_. But we still can't call interfaces that824 * are not requested.825 */826 if (swsci(display, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {827 /* make the bits match the sub-function codes */828 u32 low = tmp & 0x7ff;829 u32 high = tmp & ~0xfff; /* bit 11 is reserved */830 tmp = (high << 4) | (low << 1) | 1;831 832 /* best guess what to do with supported wrt requested */833 if (requested_callbacks) {834 u32 req = opregion->swsci_sbcb_sub_functions;835 if ((req & tmp) != req)836 drm_dbg(display->drm,837 "SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n",838 req, tmp);839 /* XXX: for now, trust the requested callbacks */840 /* opregion->swsci_sbcb_sub_functions &= tmp; */841 } else {842 opregion->swsci_sbcb_sub_functions |= tmp;843 }844 }845 846 drm_dbg(display->drm,847 "SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",848 opregion->swsci_gbda_sub_functions,849 opregion->swsci_sbcb_sub_functions);850}851 852static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)853{854 DRM_DEBUG_KMS("Falling back to manually reading VBT from "855 "VBIOS ROM for %s\n", id->ident);856 return 1;857}858 859static const struct dmi_system_id intel_no_opregion_vbt[] = {860 {861 .callback = intel_no_opregion_vbt_callback,862 .ident = "ThinkCentre A57",863 .matches = {864 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),865 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),866 },867 },868 { }869};870 871int intel_opregion_setup(struct intel_display *display)872{873 struct intel_opregion *opregion;874 struct pci_dev *pdev = to_pci_dev(display->drm->dev);875 u32 asls, mboxes;876 char buf[sizeof(OPREGION_SIGNATURE)];877 int err = 0;878 void *base;879 const void *vbt;880 u32 vbt_size;881 882 BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);883 BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);884 BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);885 BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);886 BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);887 888 pci_read_config_dword(pdev, ASLS, &asls);889 drm_dbg(display->drm, "graphic opregion physical addr: 0x%x\n",890 asls);891 if (asls == 0) {892 drm_dbg(display->drm, "ACPI OpRegion not supported!\n");893 return -ENOTSUPP;894 }895 896 opregion = kzalloc(sizeof(*opregion), GFP_KERNEL);897 if (!opregion)898 return -ENOMEM;899 900 opregion->display = display;901 display->opregion = opregion;902 903 INIT_WORK(&opregion->asle_work, asle_work);904 905 base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);906 if (!base) {907 err = -ENOMEM;908 goto err_memremap;909 }910 911 memcpy(buf, base, sizeof(buf));912 913 if (memcmp(buf, OPREGION_SIGNATURE, 16)) {914 drm_dbg(display->drm, "opregion signature mismatch\n");915 err = -EINVAL;916 goto err_out;917 }918 opregion->header = base;919 920 drm_dbg(display->drm, "ACPI OpRegion version %u.%u.%u\n",921 opregion->header->over.major,922 opregion->header->over.minor,923 opregion->header->over.revision);924 925 mboxes = opregion->header->mboxes;926 if (mboxes & MBOX_ACPI) {927 drm_dbg(display->drm, "Public ACPI methods supported\n");928 opregion->acpi = base + OPREGION_ACPI_OFFSET;929 /*930 * Indicate we handle monitor hotplug events ourselves so we do931 * not need ACPI notifications for them. Disabling these avoids932 * triggering the AML code doing the notifation, which may be933 * broken as Windows also seems to disable these.934 */935 opregion->acpi->chpd = 1;936 }937 938 if (mboxes & MBOX_SWSCI) {939 u8 major = opregion->header->over.major;940 941 if (major >= 3) {942 drm_err(display->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");943 } else {944 if (major >= 2)945 drm_dbg(display->drm, "SWSCI Mailbox #2 present for opregion v2.x\n");946 drm_dbg(display->drm, "SWSCI supported\n");947 opregion->swsci = base + OPREGION_SWSCI_OFFSET;948 swsci_setup(display);949 }950 }951 952 if (mboxes & MBOX_ASLE) {953 drm_dbg(display->drm, "ASLE supported\n");954 opregion->asle = base + OPREGION_ASLE_OFFSET;955 956 opregion->asle->ardy = ASLE_ARDY_NOT_READY;957 }958 959 if (mboxes & MBOX_ASLE_EXT) {960 drm_dbg(display->drm, "ASLE extension supported\n");961 opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET;962 }963 964 if (mboxes & MBOX_BACKLIGHT) {965 drm_dbg(display->drm, "Mailbox #2 for backlight present\n");966 }967 968 if (dmi_check_system(intel_no_opregion_vbt))969 goto out;970 971 if (opregion->header->over.major >= 2 && opregion->asle &&972 opregion->asle->rvda && opregion->asle->rvds) {973 resource_size_t rvda = opregion->asle->rvda;974 975 /*976 * opregion 2.0: rvda is the physical VBT address.977 *978 * opregion 2.1+: rvda is unsigned, relative offset from979 * opregion base, and should never point within opregion.980 */981 if (opregion->header->over.major > 2 ||982 opregion->header->over.minor >= 1) {983 drm_WARN_ON(display->drm, rvda < OPREGION_SIZE);984 985 rvda += asls;986 }987 988 opregion->rvda = memremap(rvda, opregion->asle->rvds,989 MEMREMAP_WB);990 991 vbt = opregion->rvda;992 vbt_size = opregion->asle->rvds;993 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) {994 drm_dbg_kms(display->drm,995 "Found valid VBT in ACPI OpRegion (RVDA)\n");996 opregion->vbt = vbt;997 opregion->vbt_size = vbt_size;998 goto out;999 } else {1000 drm_dbg_kms(display->drm,1001 "Invalid VBT in ACPI OpRegion (RVDA)\n");1002 memunmap(opregion->rvda);1003 opregion->rvda = NULL;1004 }1005 }1006 1007 vbt = base + OPREGION_VBT_OFFSET;1008 /*1009 * The VBT specification says that if the ASLE ext mailbox is not used1010 * its area is reserved, but on some CHT boards the VBT extends into the1011 * ASLE ext area. Allow this even though it is against the spec, so we1012 * do not end up rejecting the VBT on those boards (and end up not1013 * finding the LCD panel because of this).1014 */1015 vbt_size = (mboxes & MBOX_ASLE_EXT) ?1016 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;1017 vbt_size -= OPREGION_VBT_OFFSET;1018 if (intel_bios_is_valid_vbt(display, vbt, vbt_size)) {1019 drm_dbg_kms(display->drm,1020 "Found valid VBT in ACPI OpRegion (Mailbox #4)\n");1021 opregion->vbt = vbt;1022 opregion->vbt_size = vbt_size;1023 } else {1024 drm_dbg_kms(display->drm,1025 "Invalid VBT in ACPI OpRegion (Mailbox #4)\n");1026 }1027 1028out:1029 return 0;1030 1031err_out:1032 memunmap(base);1033err_memremap:1034 kfree(opregion);1035 display->opregion = NULL;1036 1037 return err;1038}1039 1040static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)1041{1042 DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);1043 return 1;1044}1045 1046static const struct dmi_system_id intel_use_opregion_panel_type[] = {1047 {1048 .callback = intel_use_opregion_panel_type_callback,1049 .ident = "Conrac GmbH IX45GM2",1050 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),1051 DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),1052 },1053 },1054 { }1055};1056 1057int1058intel_opregion_get_panel_type(struct intel_display *display)1059{1060 u32 panel_details;1061 int ret;1062 1063 ret = swsci(display, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);1064 if (ret)1065 return ret;1066 1067 ret = (panel_details >> 8) & 0xff;1068 if (ret > 0x10) {1069 drm_dbg_kms(display->drm,1070 "Invalid OpRegion panel type 0x%x\n", ret);1071 return -EINVAL;1072 }1073 1074 /* fall back to VBT panel type? */1075 if (ret == 0x0) {1076 drm_dbg_kms(display->drm, "No panel type in OpRegion\n");1077 return -ENODEV;1078 }1079 1080 /*1081 * So far we know that some machined must use it, others must not use it.1082 * There doesn't seem to be any way to determine which way to go, except1083 * via a quirk list :(1084 */1085 if (!dmi_check_system(intel_use_opregion_panel_type)) {1086 drm_dbg_kms(display->drm,1087 "Ignoring OpRegion panel type (%d)\n", ret - 1);1088 return -ENODEV;1089 }1090 1091 return ret - 1;1092}1093 1094/**1095 * intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #51096 * @connector: eDP connector1097 *1098 * This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed1099 * to it.1100 *1101 * Returns:1102 * The EDID in the OpRegion, or NULL if there is none or it's invalid.1103 *1104 */1105const struct drm_edid *intel_opregion_get_edid(struct intel_connector *connector)1106{1107 struct intel_display *display = to_intel_display(connector);1108 struct intel_opregion *opregion = display->opregion;1109 const struct drm_edid *drm_edid;1110 const void *edid;1111 int len;1112 1113 if (!opregion || !opregion->asle_ext)1114 return NULL;1115 1116 edid = opregion->asle_ext->bddc;1117 1118 /* Validity corresponds to number of 128-byte blocks */1119 len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128;1120 if (!len || mem_is_zero(edid, len))1121 return NULL;1122 1123 drm_edid = drm_edid_alloc(edid, len);1124 1125 if (!drm_edid_valid(drm_edid)) {1126 drm_dbg_kms(display->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n");1127 drm_edid_free(drm_edid);1128 drm_edid = NULL;1129 }1130 1131 return drm_edid;1132}1133 1134bool intel_opregion_vbt_present(struct intel_display *display)1135{1136 struct intel_opregion *opregion = display->opregion;1137 1138 if (!opregion || !opregion->vbt)1139 return false;1140 1141 return true;1142}1143 1144const void *intel_opregion_get_vbt(struct intel_display *display, size_t *size)1145{1146 struct intel_opregion *opregion = display->opregion;1147 1148 if (!opregion || !opregion->vbt)1149 return NULL;1150 1151 if (size)1152 *size = opregion->vbt_size;1153 1154 return kmemdup(opregion->vbt, opregion->vbt_size, GFP_KERNEL);1155}1156 1157bool intel_opregion_headless_sku(struct intel_display *display)1158{1159 struct intel_opregion *opregion = display->opregion;1160 struct opregion_header *header;1161 1162 if (!opregion)1163 return false;1164 1165 header = opregion->header;1166 1167 if (!header || header->over.major < 2 ||1168 (header->over.major == 2 && header->over.minor < 3))1169 return false;1170 1171 return opregion->header->pcon & PCON_HEADLESS_SKU;1172}1173 1174void intel_opregion_register(struct intel_display *display)1175{1176 struct intel_opregion *opregion = display->opregion;1177 1178 if (!opregion)1179 return;1180 1181 if (opregion->acpi) {1182 opregion->acpi_notifier.notifier_call =1183 intel_opregion_video_event;1184 register_acpi_notifier(&opregion->acpi_notifier);1185 }1186 1187 intel_opregion_resume(display);1188}1189 1190static void intel_opregion_resume_display(struct intel_display *display)1191{1192 struct intel_opregion *opregion = display->opregion;1193 1194 if (opregion->acpi) {1195 intel_didl_outputs(display);1196 intel_setup_cadls(display);1197 1198 /*1199 * Notify BIOS we are ready to handle ACPI video ext notifs.1200 * Right now, all the events are handled by the ACPI video1201 * module. We don't actually need to do anything with them.1202 */1203 opregion->acpi->csts = 0;1204 opregion->acpi->drdy = 1;1205 }1206 1207 if (opregion->asle) {1208 opregion->asle->tche = ASLE_TCHE_BLC_EN;1209 opregion->asle->ardy = ASLE_ARDY_READY;1210 }1211 1212 /* Some platforms abuse the _DSM to enable MUX */1213 intel_dsm_get_bios_data_funcs_supported(display);1214}1215 1216void intel_opregion_resume(struct intel_display *display)1217{1218 struct intel_opregion *opregion = display->opregion;1219 1220 if (!opregion)1221 return;1222 1223 if (HAS_DISPLAY(display))1224 intel_opregion_resume_display(display);1225 1226 intel_opregion_notify_adapter(display, PCI_D0);1227}1228 1229static void intel_opregion_suspend_display(struct intel_display *display)1230{1231 struct intel_opregion *opregion = display->opregion;1232 1233 if (opregion->asle)1234 opregion->asle->ardy = ASLE_ARDY_NOT_READY;1235 1236 cancel_work_sync(&opregion->asle_work);1237 1238 if (opregion->acpi)1239 opregion->acpi->drdy = 0;1240}1241 1242void intel_opregion_suspend(struct intel_display *display, pci_power_t state)1243{1244 struct intel_opregion *opregion = display->opregion;1245 1246 if (!opregion)1247 return;1248 1249 intel_opregion_notify_adapter(display, state);1250 1251 if (HAS_DISPLAY(display))1252 intel_opregion_suspend_display(display);1253}1254 1255void intel_opregion_unregister(struct intel_display *display)1256{1257 struct intel_opregion *opregion = display->opregion;1258 1259 intel_opregion_suspend(display, PCI_D1);1260 1261 if (!opregion)1262 return;1263 1264 if (opregion->acpi_notifier.notifier_call) {1265 unregister_acpi_notifier(&opregion->acpi_notifier);1266 opregion->acpi_notifier.notifier_call = NULL;1267 }1268}1269 1270void intel_opregion_cleanup(struct intel_display *display)1271{1272 struct intel_opregion *opregion = display->opregion;1273 1274 if (!opregion)1275 return;1276 1277 memunmap(opregion->header);1278 if (opregion->rvda)1279 memunmap(opregion->rvda);1280 kfree(opregion);1281 display->opregion = NULL;1282}1283 1284static int intel_opregion_show(struct seq_file *m, void *unused)1285{1286 struct intel_display *display = m->private;1287 struct intel_opregion *opregion = display->opregion;1288 1289 if (opregion)1290 seq_write(m, opregion->header, OPREGION_SIZE);1291 1292 return 0;1293}1294 1295DEFINE_SHOW_ATTRIBUTE(intel_opregion);1296 1297void intel_opregion_debugfs_register(struct intel_display *display)1298{1299 struct drm_minor *minor = display->drm->primary;1300 1301 debugfs_create_file("i915_opregion", 0444, minor->debugfs_root,1302 display, &intel_opregion_fops);1303}1304