drivers/gpu/drm/i915/intel_opregion.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 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
  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         u8 reserved[164];
  66 } __packed;
  67
  68 /* OpRegion mailbox #1: public ACPI methods */
  69 struct 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 */
  91 struct 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 */
  99 struct 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
 232 static 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
 325 int 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
 372 static 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
 383 int 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 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 400 {
 401         struct drm_i915_private *dev_priv = dev->dev_private;
 402         struct intel_connector *intel_connector;
 403         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 404
 405         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
 406
 407         if (acpi_video_get_backlight_type() == acpi_backlight_native) {
 408                 DRM_DEBUG_KMS("opregion backlight request ignored\n");
 409                 return 0;
 410         }
 411
 412         if (!(bclp & ASLE_BCLP_VALID))
 413                 return ASLC_BACKLIGHT_FAILED;
 414
 415         bclp &= ASLE_BCLP_MSK;
 416         if (bclp > 255)
 417                 return ASLC_BACKLIGHT_FAILED;
 418
 419         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 420
 421         /*
 422          * Update backlight on all connectors that support backlight (usually
 423          * only one).
 424          */
 425         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
 426         list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
 427                 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
 428         iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
 429
 430         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 431
 432
 433         return 0;
 434 }
 435
 436 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
 437 {
 438         /* alsi is the current ALS reading in lux. 0 indicates below sensor
 439            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 440         DRM_DEBUG_DRIVER("Illum is not supported\n");
 441         return ASLC_ALS_ILLUM_FAILED;
 442 }
 443
 444 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
 445 {
 446         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 447         return ASLC_PWM_FREQ_FAILED;
 448 }
 449
 450 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
 451 {
 452         /* Panel fitting is currently controlled by the X code, so this is a
 453            noop until modesetting support works fully */
 454         DRM_DEBUG_DRIVER("Pfit is not supported\n");
 455         return ASLC_PFIT_FAILED;
 456 }
 457
 458 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
 459 {
 460         DRM_DEBUG_DRIVER("SROT is not supported\n");
 461         return ASLC_ROTATION_ANGLES_FAILED;
 462 }
 463
 464 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
 465 {
 466         if (!iuer)
 467                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
 468         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
 469                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
 470         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
 471                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
 472         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
 473                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
 474         if (iuer & ASLE_IUER_WINDOWS_BTN)
 475                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
 476         if (iuer & ASLE_IUER_POWER_BTN)
 477                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
 478
 479         return ASLC_BUTTON_ARRAY_FAILED;
 480 }
 481
 482 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
 483 {
 484         if (iuer & ASLE_IUER_CONVERTIBLE)
 485                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
 486         else
 487                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
 488
 489         return ASLC_CONVERTIBLE_FAILED;
 490 }
 491
 492 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
 493 {
 494         if (iuer & ASLE_IUER_DOCKING)
 495                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
 496         else
 497                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
 498
 499         return ASLC_DOCKING_FAILED;
 500 }
 501
 502 static u32 asle_isct_state(struct drm_device *dev)
 503 {
 504         DRM_DEBUG_DRIVER("ISCT is not supported\n");
 505         return ASLC_ISCT_STATE_FAILED;
 506 }
 507
 508 static void asle_work(struct work_struct *work)
 509 {
 510         struct intel_opregion *opregion =
 511                 container_of(work, struct intel_opregion, asle_work);
 512         struct drm_i915_private *dev_priv =
 513                 container_of(opregion, struct drm_i915_private, opregion);
 514         struct drm_device *dev = dev_priv->dev;
 515         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 516         u32 aslc_stat = 0;
 517         u32 aslc_req;
 518
 519         if (!asle)
 520                 return;
 521
 522         aslc_req = ioread32(&asle->aslc);
 523
 524         if (!(aslc_req & ASLC_REQ_MSK)) {
 525                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
 526                                  aslc_req);
 527                 return;
 528         }
 529
 530         if (aslc_req & ASLC_SET_ALS_ILLUM)
 531                 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
 532
 533         if (aslc_req & ASLC_SET_BACKLIGHT)
 534                 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
 535
 536         if (aslc_req & ASLC_SET_PFIT)
 537                 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
 538
 539         if (aslc_req & ASLC_SET_PWM_FREQ)
 540                 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
 541
 542         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
 543                 aslc_stat |= asle_set_supported_rotation_angles(dev,
 544                                                         ioread32(&asle->srot));
 545
 546         if (aslc_req & ASLC_BUTTON_ARRAY)
 547                 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
 548
 549         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
 550                 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
 551
 552         if (aslc_req & ASLC_DOCKING_INDICATOR)
 553                 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
 554
 555         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
 556                 aslc_stat |= asle_isct_state(dev);
 557
 558         iowrite32(aslc_stat, &asle->aslc);
 559 }
 560
 561 void intel_opregion_asle_intr(struct drm_device *dev)
 562 {
 563         struct drm_i915_private *dev_priv = dev->dev_private;
 564
 565         if (dev_priv->opregion.asle)
 566                 schedule_work(&dev_priv->opregion.asle_work);
 567 }
 568
 569 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 570 #define ACPI_EV_LID            (1<<1)
 571 #define ACPI_EV_DOCK           (1<<2)
 572
 573 static struct intel_opregion *system_opregion;
 574
 575 static int intel_opregion_video_event(struct notifier_block *nb,
 576                                       unsigned long val, void *data)
 577 {
 578         /* The only video events relevant to opregion are 0x80. These indicate
 579            either a docking event, lid switch or display switch request. In
 580            Linux, these are handled by the dock, button and video drivers.
 581         */
 582
 583         struct opregion_acpi __iomem *acpi;
 584         struct acpi_bus_event *event = data;
 585         int ret = NOTIFY_OK;
 586
 587         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 588                 return NOTIFY_DONE;
 589
 590         if (!system_opregion)
 591                 return NOTIFY_DONE;
 592
 593         acpi = system_opregion->acpi;
 594
 595         if (event->type == 0x80 &&
 596             (ioread32(&acpi->cevt) & 1) == 0)
 597                 ret = NOTIFY_BAD;
 598
 599         iowrite32(0, &acpi->csts);
 600
 601         return ret;
 602 }
 603
 604 static struct notifier_block intel_opregion_notifier = {
 605         .notifier_call = intel_opregion_video_event,
 606 };
 607
 608 /*
 609  * Initialise the DIDL field in opregion. This passes a list of devices to
 610  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 611  * (version 3)
 612  */
 613
 614 static void intel_didl_outputs(struct drm_device *dev)
 615 {
 616         struct drm_i915_private *dev_priv = dev->dev_private;
 617         struct intel_opregion *opregion = &dev_priv->opregion;
 618         struct drm_connector *connector;
 619         acpi_handle handle;
 620         struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
 621         unsigned long long device_id;
 622         acpi_status status;
 623         u32 temp;
 624         int i = 0;
 625
 626         handle = ACPI_HANDLE(&dev->pdev->dev);
 627         if (!handle || acpi_bus_get_device(handle, &acpi_dev))
 628                 return;
 629
 630         if (acpi_is_video_device(handle))
 631                 acpi_video_bus = acpi_dev;
 632         else {
 633                 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
 634                         if (acpi_is_video_device(acpi_cdev->handle)) {
 635                                 acpi_video_bus = acpi_cdev;
 636                                 break;
 637                         }
 638                 }
 639         }
 640
 641         if (!acpi_video_bus) {
 642                 pr_warn("No ACPI video bus found\n");
 643                 return;
 644         }
 645
 646         list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
 647                 if (i >= 8) {
 648                         dev_dbg(&dev->pdev->dev,
 649                                 "More than 8 outputs detected via ACPI\n");
 650                         return;
 651                 }
 652                 status =
 653                         acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
 654                                                 NULL, &device_id);
 655                 if (ACPI_SUCCESS(status)) {
 656                         if (!device_id)
 657                                 goto blind_set;
 658                         iowrite32((u32)(device_id & 0x0f0f),
 659                                   &opregion->acpi->didl[i]);
 660                         i++;
 661                 }
 662         }
 663
 664 end:
 665         /* If fewer than 8 outputs, the list must be null terminated */
 666         if (i < 8)
 667                 iowrite32(0, &opregion->acpi->didl[i]);
 668         return;
 669
 670 blind_set:
 671         i = 0;
 672         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 673                 int output_type = ACPI_OTHER_OUTPUT;
 674                 if (i >= 8) {
 675                         dev_dbg(&dev->pdev->dev,
 676                                 "More than 8 outputs in connector list\n");
 677                         return;
 678                 }
 679                 switch (connector->connector_type) {
 680                 case DRM_MODE_CONNECTOR_VGA:
 681                 case DRM_MODE_CONNECTOR_DVIA:
 682                         output_type = ACPI_VGA_OUTPUT;
 683                         break;
 684                 case DRM_MODE_CONNECTOR_Composite:
 685                 case DRM_MODE_CONNECTOR_SVIDEO:
 686                 case DRM_MODE_CONNECTOR_Component:
 687                 case DRM_MODE_CONNECTOR_9PinDIN:
 688                         output_type = ACPI_TV_OUTPUT;
 689                         break;
 690                 case DRM_MODE_CONNECTOR_DVII:
 691                 case DRM_MODE_CONNECTOR_DVID:
 692                 case DRM_MODE_CONNECTOR_DisplayPort:
 693                 case DRM_MODE_CONNECTOR_HDMIA:
 694                 case DRM_MODE_CONNECTOR_HDMIB:
 695                         output_type = ACPI_DIGITAL_OUTPUT;
 696                         break;
 697                 case DRM_MODE_CONNECTOR_LVDS:
 698                         output_type = ACPI_LVDS_OUTPUT;
 699                         break;
 700                 }
 701                 temp = ioread32(&opregion->acpi->didl[i]);
 702                 iowrite32(temp | (1<<31) | output_type | i,
 703                           &opregion->acpi->didl[i]);
 704                 i++;
 705         }
 706         goto end;
 707 }
 708
 709 static void intel_setup_cadls(struct drm_device *dev)
 710 {
 711         struct drm_i915_private *dev_priv = dev->dev_private;
 712         struct intel_opregion *opregion = &dev_priv->opregion;
 713         int i = 0;
 714         u32 disp_id;
 715
 716         /* Initialize the CADL field by duplicating the DIDL values.
 717          * Technically, this is not always correct as display outputs may exist,
 718          * but not active. This initialization is necessary for some Clevo
 719          * laptops that check this field before processing the brightness and
 720          * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
 721          * there are less than eight devices. */
 722         do {
 723                 disp_id = ioread32(&opregion->acpi->didl[i]);
 724                 iowrite32(disp_id, &opregion->acpi->cadl[i]);
 725         } while (++i < 8 && disp_id != 0);
 726 }
 727
 728 void intel_opregion_init(struct drm_device *dev)
 729 {
 730         struct drm_i915_private *dev_priv = dev->dev_private;
 731         struct intel_opregion *opregion = &dev_priv->opregion;
 732
 733         if (!opregion->header)
 734                 return;
 735
 736         if (opregion->acpi) {
 737                 intel_didl_outputs(dev);
 738                 intel_setup_cadls(dev);
 739
 740                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
 741                  * Right now, all the events are handled by the ACPI video module.
 742                  * We don't actually need to do anything with them. */
 743                 iowrite32(0, &opregion->acpi->csts);
 744                 iowrite32(1, &opregion->acpi->drdy);
 745
 746                 system_opregion = opregion;
 747                 register_acpi_notifier(&intel_opregion_notifier);
 748         }
 749
 750         if (opregion->asle) {
 751                 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
 752                 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
 753         }
 754 }
 755
 756 void intel_opregion_fini(struct drm_device *dev)
 757 {
 758         struct drm_i915_private *dev_priv = dev->dev_private;
 759         struct intel_opregion *opregion = &dev_priv->opregion;
 760
 761         if (!opregion->header)
 762                 return;
 763
 764         if (opregion->asle)
 765                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 766
 767         cancel_work_sync(&dev_priv->opregion.asle_work);
 768
 769         if (opregion->acpi) {
 770                 iowrite32(0, &opregion->acpi->drdy);
 771
 772                 system_opregion = NULL;
 773                 unregister_acpi_notifier(&intel_opregion_notifier);
 774         }
 775
 776         /* just clear all opregion memory pointers now */
 777         iounmap(opregion->header);
 778         opregion->header = NULL;
 779         opregion->acpi = NULL;
 780         opregion->swsci = NULL;
 781         opregion->asle = NULL;
 782         opregion->vbt = NULL;
 783         opregion->lid_state = NULL;
 784 }
 785
 786 static void swsci_setup(struct drm_device *dev)
 787 {
 788         struct drm_i915_private *dev_priv = dev->dev_private;
 789         struct intel_opregion *opregion = &dev_priv->opregion;
 790         bool requested_callbacks = false;
 791         u32 tmp;
 792
 793         /* Sub-function code 0 is okay, let's allow them. */
 794         opregion->swsci_gbda_sub_functions = 1;
 795         opregion->swsci_sbcb_sub_functions = 1;
 796
 797         /* We use GBDA to ask for supported GBDA calls. */
 798         if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
 799                 /* make the bits match the sub-function codes */
 800                 tmp <<= 1;
 801                 opregion->swsci_gbda_sub_functions |= tmp;
 802         }
 803
 804         /*
 805          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
 806          * must not call interfaces that are not specifically requested by the
 807          * bios.
 808          */
 809         if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
 810                 /* here, the bits already match sub-function codes */
 811                 opregion->swsci_sbcb_sub_functions |= tmp;
 812                 requested_callbacks = true;
 813         }
 814
 815         /*
 816          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
 817          * the callback is _requested_. But we still can't call interfaces that
 818          * are not requested.
 819          */
 820         if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
 821                 /* make the bits match the sub-function codes */
 822                 u32 low = tmp & 0x7ff;
 823                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
 824                 tmp = (high << 4) | (low << 1) | 1;
 825
 826                 /* best guess what to do with supported wrt requested */
 827                 if (requested_callbacks) {
 828                         u32 req = opregion->swsci_sbcb_sub_functions;
 829                         if ((req & tmp) != req)
 830                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
 831                         /* XXX: for now, trust the requested callbacks */
 832                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
 833                 } else {
 834                         opregion->swsci_sbcb_sub_functions |= tmp;
 835                 }
 836         }
 837
 838         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
 839                          opregion->swsci_gbda_sub_functions,
 840                          opregion->swsci_sbcb_sub_functions);
 841 }
 842 #else /* CONFIG_ACPI */
 843 static inline void swsci_setup(struct drm_device *dev) {}
 844 #endif  /* CONFIG_ACPI */
 845
 846 int intel_opregion_setup(struct drm_device *dev)
 847 {
 848         struct drm_i915_private *dev_priv = dev->dev_private;
 849         struct intel_opregion *opregion = &dev_priv->opregion;
 850         void __iomem *base;
 851         u32 asls, mboxes;
 852         char buf[sizeof(OPREGION_SIGNATURE)];
 853         int err = 0;
 854
 855         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 856         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 857         if (asls == 0) {
 858                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 859                 return -ENOTSUPP;
 860         }
 861
 862 #ifdef CONFIG_ACPI
 863         INIT_WORK(&opregion->asle_work, asle_work);
 864 #endif
 865
 866         base = acpi_os_ioremap(asls, OPREGION_SIZE);
 867         if (!base)
 868                 return -ENOMEM;
 869
 870         memcpy_fromio(buf, base, sizeof(buf));
 871
 872         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 873                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 874                 err = -EINVAL;
 875                 goto err_out;
 876         }
 877         opregion->header = base;
 878         opregion->vbt = base + OPREGION_VBT_OFFSET;
 879
 880         opregion->lid_state = base + ACPI_CLID;
 881
 882         mboxes = ioread32(&opregion->header->mboxes);
 883         if (mboxes & MBOX_ACPI) {
 884                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 885                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
 886         }
 887
 888         if (mboxes & MBOX_SWSCI) {
 889                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 890                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
 891                 swsci_setup(dev);
 892         }
 893         if (mboxes & MBOX_ASLE) {
 894                 DRM_DEBUG_DRIVER("ASLE supported\n");
 895                 opregion->asle = base + OPREGION_ASLE_OFFSET;
 896
 897                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 898         }
 899
 900         return 0;
 901
 902 err_out:
 903         iounmap(base);
 904         return err;
 905 }