sys/dev/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 #include <drm/drmP.h>
  29 #include <drm/i915_drm.h>
  30 #include "i915_drv.h"
  31 #include "intel_drv.h"
  32
  33 #include <contrib/dev/acpica/source/include/acpi.h>
  34 #include <contrib/dev/acpica/source/include/accommon.h>
  35 #include <dev/acpica/acpivar.h>
  36
  37 #define PCI_ASLE                0xe4
  38 #define PCI_ASLS                0xfc
  39 #define PCI_SWSCI               0xe8
  40 #define PCI_SWSCI_SCISEL        (1 << 15)
  41 #define PCI_SWSCI_GSSCIE        (1 << 0)
  42
  43 #define OPREGION_HEADER_OFFSET 0
  44 #define OPREGION_ACPI_OFFSET   0x100
  45 #define   ACPI_CLID 0x01ac /* current lid state indicator */
  46 #define   ACPI_CDCK 0x01b0 /* current docking state indicator */
  47 #define OPREGION_SWSCI_OFFSET  0x200
  48 #define OPREGION_ASLE_OFFSET   0x300
  49 #define OPREGION_VBT_OFFSET    0x400
  50
  51 #define OPREGION_SIGNATURE "IntelGraphicsMem"
  52 #define MBOX_ACPI      (1<<0)
  53 #define MBOX_SWSCI     (1<<1)
  54 #define MBOX_ASLE      (1<<2)
  55 #define MBOX_ASLE_EXT  (1<<4)
  56
  57 struct opregion_header {
  58         u8 signature[16];
  59         u32 size;
  60         u32 opregion_ver;
  61         u8 bios_ver[32];
  62         u8 vbios_ver[16];
  63         u8 driver_ver[16];
  64         u32 mboxes;
  65         u32 driver_model;
  66         u32 pcon;
  67         u8 dver[32];
  68         u8 rsvd[124];
  69 } __packed;
  70
  71 /* OpRegion mailbox #1: public ACPI methods */
  72 struct opregion_acpi {
  73         u32 drdy;       /* driver readiness */
  74         u32 csts;       /* notification status */
  75         u32 cevt;       /* current event */
  76         u8 rsvd1[20];
  77         u32 didl[8];    /* supported display devices ID list */
  78         u32 cpdl[8];    /* currently presented display list */
  79         u32 cadl[8];    /* currently active display list */
  80         u32 nadl[8];    /* next active devices list */
  81         u32 aslp;       /* ASL sleep time-out */
  82         u32 tidx;       /* toggle table index */
  83         u32 chpd;       /* current hotplug enable indicator */
  84         u32 clid;       /* current lid state*/
  85         u32 cdck;       /* current docking state */
  86         u32 sxsw;       /* Sx state resume */
  87         u32 evts;       /* ASL supported events */
  88         u32 cnot;       /* current OS notification */
  89         u32 nrdy;       /* driver status */
  90         u32 did2[7];    /* extended supported display devices ID list */
  91         u32 cpd2[7];    /* extended attached display devices list */
  92         u8 rsvd2[4];
  93 } __packed;
  94
  95 /* OpRegion mailbox #2: SWSCI */
  96 struct opregion_swsci {
  97         u32 scic;       /* SWSCI command|status|data */
  98         u32 parm;       /* command parameters */
  99         u32 dslp;       /* driver sleep time-out */
 100         u8 rsvd[244];
 101 } __packed;
 102
 103 /* OpRegion mailbox #3: ASLE */
 104 struct opregion_asle {
 105         u32 ardy;       /* driver readiness */
 106         u32 aslc;       /* ASLE interrupt command */
 107         u32 tche;       /* technology enabled indicator */
 108         u32 alsi;       /* current ALS illuminance reading */
 109         u32 bclp;       /* backlight brightness to set */
 110         u32 pfit;       /* panel fitting state */
 111         u32 cblv;       /* current brightness level */
 112         u16 bclm[20];   /* backlight level duty cycle mapping table */
 113         u32 cpfm;       /* current panel fitting mode */
 114         u32 epfm;       /* enabled panel fitting modes */
 115         u8 plut[74];    /* panel LUT and identifier */
 116         u32 pfmb;       /* PWM freq and min brightness */
 117         u32 cddv;       /* color correction default values */
 118         u32 pcft;       /* power conservation features */
 119         u32 srot;       /* supported rotation angles */
 120         u32 iuer;       /* IUER events */
 121         u64 fdss;
 122         u32 fdsp;
 123         u32 stat;
 124         u8 rsvd[70];
 125 } __packed;
 126
 127 /* Driver readiness indicator */
 128 #define ASLE_ARDY_READY         (1 << 0)
 129 #define ASLE_ARDY_NOT_READY     (0 << 0)
 130
 131 /* ASLE Interrupt Command (ASLC) bits */
 132 #define ASLC_SET_ALS_ILLUM              (1 << 0)
 133 #define ASLC_SET_BACKLIGHT              (1 << 1)
 134 #define ASLC_SET_PFIT                   (1 << 2)
 135 #define ASLC_SET_PWM_FREQ               (1 << 3)
 136 #define ASLC_SUPPORTED_ROTATION_ANGLES  (1 << 4)
 137 #define ASLC_BUTTON_ARRAY               (1 << 5)
 138 #define ASLC_CONVERTIBLE_INDICATOR      (1 << 6)
 139 #define ASLC_DOCKING_INDICATOR          (1 << 7)
 140 #define ASLC_ISCT_STATE_CHANGE          (1 << 8)
 141 #define ASLC_REQ_MSK                    0x1ff
 142 /* response bits */
 143 #define ASLC_ALS_ILLUM_FAILED           (1 << 10)
 144 #define ASLC_BACKLIGHT_FAILED           (1 << 12)
 145 #define ASLC_PFIT_FAILED                (1 << 14)
 146 #define ASLC_PWM_FREQ_FAILED            (1 << 16)
 147 #define ASLC_ROTATION_ANGLES_FAILED     (1 << 18)
 148 #define ASLC_BUTTON_ARRAY_FAILED        (1 << 20)
 149 #define ASLC_CONVERTIBLE_FAILED         (1 << 22)
 150 #define ASLC_DOCKING_FAILED             (1 << 24)
 151 #define ASLC_ISCT_STATE_FAILED          (1 << 26)
 152
 153 /* Technology enabled indicator */
 154 #define ASLE_TCHE_ALS_EN        (1 << 0)
 155 #define ASLE_TCHE_BLC_EN        (1 << 1)
 156 #define ASLE_TCHE_PFIT_EN       (1 << 2)
 157 #define ASLE_TCHE_PFMB_EN       (1 << 3)
 158
 159 /* ASLE backlight brightness to set */
 160 #define ASLE_BCLP_VALID                (1<<31)
 161 #define ASLE_BCLP_MSK          (~(1<<31))
 162
 163 /* ASLE panel fitting request */
 164 #define ASLE_PFIT_VALID         (1<<31)
 165 #define ASLE_PFIT_CENTER (1<<0)
 166 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
 167 #define ASLE_PFIT_STRETCH_GFX (1<<2)
 168
 169 /* PWM frequency and minimum brightness */
 170 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
 171 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
 172 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
 173 #define ASLE_PFMB_PWM_VALID (1<<31)
 174
 175 #define ASLE_CBLV_VALID         (1<<31)
 176
 177 /* IUER */
 178 #define ASLE_IUER_DOCKING               (1 << 7)
 179 #define ASLE_IUER_CONVERTIBLE           (1 << 6)
 180 #define ASLE_IUER_ROTATION_LOCK_BTN     (1 << 4)
 181 #define ASLE_IUER_VOLUME_DOWN_BTN       (1 << 3)
 182 #define ASLE_IUER_VOLUME_UP_BTN         (1 << 2)
 183 #define ASLE_IUER_WINDOWS_BTN           (1 << 1)
 184 #define ASLE_IUER_POWER_BTN             (1 << 0)
 185
 186 /* Software System Control Interrupt (SWSCI) */
 187 #define SWSCI_SCIC_INDICATOR            (1 << 0)
 188 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT  1
 189 #define SWSCI_SCIC_MAIN_FUNCTION_MASK   (0xf << 1)
 190 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT   8
 191 #define SWSCI_SCIC_SUB_FUNCTION_MASK    (0xff << 8)
 192 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
 193 #define SWSCI_SCIC_EXIT_PARAMETER_MASK  (0xff << 8)
 194 #define SWSCI_SCIC_EXIT_STATUS_SHIFT    5
 195 #define SWSCI_SCIC_EXIT_STATUS_MASK     (7 << 5)
 196 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS  1
 197
 198 #define SWSCI_FUNCTION_CODE(main, sub) \
 199         ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
 200          (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
 201
 202 /* SWSCI: Get BIOS Data (GBDA) */
 203 #define SWSCI_GBDA                      4
 204 #define SWSCI_GBDA_SUPPORTED_CALLS      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
 205 #define SWSCI_GBDA_REQUESTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
 206 #define SWSCI_GBDA_BOOT_DISPLAY_PREF    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
 207 #define SWSCI_GBDA_PANEL_DETAILS        SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
 208 #define SWSCI_GBDA_TV_STANDARD          SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
 209 #define SWSCI_GBDA_INTERNAL_GRAPHICS    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
 210 #define SWSCI_GBDA_SPREAD_SPECTRUM      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
 211
 212 /* SWSCI: System BIOS Callbacks (SBCB) */
 213 #define SWSCI_SBCB                      6
 214 #define SWSCI_SBCB_SUPPORTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
 215 #define SWSCI_SBCB_INIT_COMPLETION      SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
 216 #define SWSCI_SBCB_PRE_HIRES_SET_MODE   SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
 217 #define SWSCI_SBCB_POST_HIRES_SET_MODE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
 218 #define SWSCI_SBCB_DISPLAY_SWITCH       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
 219 #define SWSCI_SBCB_SET_TV_FORMAT        SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
 220 #define SWSCI_SBCB_ADAPTER_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
 221 #define SWSCI_SBCB_DISPLAY_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
 222 #define SWSCI_SBCB_SET_BOOT_DISPLAY     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
 223 #define SWSCI_SBCB_SET_PANEL_DETAILS    SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
 224 #define SWSCI_SBCB_SET_INTERNAL_GFX     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
 225 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
 226 #define SWSCI_SBCB_SUSPEND_RESUME       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
 227 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
 228 #define SWSCI_SBCB_POST_VBE_PM          SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
 229 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
 230
 231 #define ACPI_OTHER_OUTPUT (0<<8)
 232 #define ACPI_VGA_OUTPUT (1<<8)
 233 #define ACPI_TV_OUTPUT (2<<8)
 234 #define ACPI_DIGITAL_OUTPUT (3<<8)
 235 #define ACPI_LVDS_OUTPUT (4<<8)
 236
 237 #define MAX_DSLP        1500
 238
 239 #ifdef CONFIG_ACPI
 240 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
 241 {
 242         struct drm_i915_private *dev_priv = dev->dev_private;
 243         struct opregion_swsci *swsci = dev_priv->opregion.swsci;
 244         u32 main_function, sub_function, scic;
 245         u16 pci_swsci;
 246         u32 dslp;
 247
 248         if (!swsci)
 249                 return -ENODEV;
 250
 251         main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
 252                 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
 253         sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
 254                 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
 255
 256         /* Check if we can call the function. See swsci_setup for details. */
 257         if (main_function == SWSCI_SBCB) {
 258                 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
 259                      (1 << sub_function)) == 0)
 260                         return -EINVAL;
 261         } else if (main_function == SWSCI_GBDA) {
 262                 if ((dev_priv->opregion.swsci_gbda_sub_functions &
 263                      (1 << sub_function)) == 0)
 264                         return -EINVAL;
 265         }
 266
 267         /* Driver sleep timeout in ms. */
 268         dslp = swsci->dslp;
 269         if (!dslp) {
 270                 /* The spec says 2ms should be the default, but it's too small
 271                  * for some machines. */
 272                 dslp = 50;
 273         } else if (dslp > MAX_DSLP) {
 274                 /* Hey bios, trust must be earned. */
 275                 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
 276                               "using %u ms instead\n", dslp, MAX_DSLP);
 277                 dslp = MAX_DSLP;
 278         }
 279
 280         /* The spec tells us to do this, but we are the only user... */
 281         scic = swsci->scic;
 282         if (scic & SWSCI_SCIC_INDICATOR) {
 283                 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
 284                 return -EBUSY;
 285         }
 286
 287         scic = function | SWSCI_SCIC_INDICATOR;
 288
 289         swsci->parm = parm;
 290         swsci->scic = scic;
 291
 292         /* Ensure SCI event is selected and event trigger is cleared. */
 293         pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
 294         if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
 295                 pci_swsci |= PCI_SWSCI_SCISEL;
 296                 pci_swsci &= ~PCI_SWSCI_GSSCIE;
 297                 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
 298         }
 299
 300         /* Use event trigger to tell bios to check the mail. */
 301         pci_swsci |= PCI_SWSCI_GSSCIE;
 302         pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
 303
 304         /* Poll for the result. */
 305 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
 306         if (wait_for(C, dslp)) {
 307                 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
 308                 return -ETIMEDOUT;
 309         }
 310
 311         scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
 312                 SWSCI_SCIC_EXIT_STATUS_SHIFT;
 313
 314         /* Note: scic == 0 is an error! */
 315         if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
 316                 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
 317                 return -EIO;
 318         }
 319
 320         if (parm_out)
 321                 *parm_out = swsci->parm;
 322
 323         return 0;
 324
 325 #undef C
 326 }
 327
 328 #define DISPLAY_TYPE_CRT                        0
 329 #define DISPLAY_TYPE_TV                         1
 330 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL        2
 331 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL        3
 332
 333 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 334                                   bool enable)
 335 {
 336         struct drm_device *dev = intel_encoder->base.dev;
 337         u32 parm = 0;
 338         u32 type = 0;
 339         u32 port;
 340
 341         /* don't care about old stuff for now */
 342         if (!HAS_DDI(dev))
 343                 return 0;
 344
 345         if (intel_encoder->type == INTEL_OUTPUT_DSI)
 346                 port = 0;
 347         else
 348                 port = intel_ddi_get_encoder_port(intel_encoder);
 349
 350         if (port == PORT_E)  {
 351                 port = 0;
 352         } else {
 353                 parm |= 1 << port;
 354                 port++;
 355         }
 356
 357         if (!enable)
 358                 parm |= 4 << 8;
 359
 360         switch (intel_encoder->type) {
 361         case INTEL_OUTPUT_ANALOG:
 362                 type = DISPLAY_TYPE_CRT;
 363                 break;
 364         case INTEL_OUTPUT_UNKNOWN:
 365         case INTEL_OUTPUT_DISPLAYPORT:
 366         case INTEL_OUTPUT_HDMI:
 367         case INTEL_OUTPUT_DP_MST:
 368                 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
 369                 break;
 370         case INTEL_OUTPUT_EDP:
 371         case INTEL_OUTPUT_DSI:
 372                 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
 373                 break;
 374         default:
 375                 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
 376                           intel_encoder->type);
 377                 return -EINVAL;
 378         }
 379
 380         parm |= type << (16 + port * 3);
 381
 382         return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
 383 }
 384
 385 static const struct {
 386         pci_power_t pci_power_state;
 387         u32 parm;
 388 } power_state_map[] = {
 389         { PCI_D0,       0x00 },
 390         { PCI_D1,       0x01 },
 391         { PCI_D2,       0x02 },
 392         { PCI_D3hot,    0x04 },
 393         { PCI_D3cold,   0x04 },
 394 };
 395
 396 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
 397 {
 398         int i;
 399
 400         if (!HAS_DDI(dev))
 401                 return 0;
 402
 403         for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
 404                 if (state == power_state_map[i].pci_power_state)
 405                         return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
 406                                      power_state_map[i].parm, NULL);
 407         }
 408
 409         return -EINVAL;
 410 }
 411
 412 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 413 {
 414         struct drm_i915_private *dev_priv = dev->dev_private;
 415         struct intel_connector *intel_connector;
 416         struct opregion_asle *asle = dev_priv->opregion.asle;
 417
 418         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
 419
 420 #ifndef __DragonFly__
 421         if (acpi_video_get_backlight_type() == acpi_backlight_native) {
 422                 DRM_DEBUG_KMS("opregion backlight request ignored\n");
 423                 return 0;
 424         }
 425 #endif
 426
 427         if (!(bclp & ASLE_BCLP_VALID))
 428                 return ASLC_BACKLIGHT_FAILED;
 429
 430         bclp &= ASLE_BCLP_MSK;
 431         if (bclp > 255)
 432                 return ASLC_BACKLIGHT_FAILED;
 433
 434         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 435
 436         /*
 437          * Update backlight on all connectors that support backlight (usually
 438          * only one).
 439          */
 440         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
 441         list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
 442                 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
 443         asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
 444
 445         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 446
 447
 448         return 0;
 449 }
 450
 451 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
 452 {
 453         /* alsi is the current ALS reading in lux. 0 indicates below sensor
 454            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 455         DRM_DEBUG_DRIVER("Illum is not supported\n");
 456         return ASLC_ALS_ILLUM_FAILED;
 457 }
 458
 459 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
 460 {
 461         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 462         return ASLC_PWM_FREQ_FAILED;
 463 }
 464
 465 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
 466 {
 467         /* Panel fitting is currently controlled by the X code, so this is a
 468            noop until modesetting support works fully */
 469         DRM_DEBUG_DRIVER("Pfit is not supported\n");
 470         return ASLC_PFIT_FAILED;
 471 }
 472
 473 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
 474 {
 475         DRM_DEBUG_DRIVER("SROT is not supported\n");
 476         return ASLC_ROTATION_ANGLES_FAILED;
 477 }
 478
 479 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
 480 {
 481         if (!iuer)
 482                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
 483         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
 484                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
 485         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
 486                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
 487         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
 488                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
 489         if (iuer & ASLE_IUER_WINDOWS_BTN)
 490                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
 491         if (iuer & ASLE_IUER_POWER_BTN)
 492                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
 493
 494         return ASLC_BUTTON_ARRAY_FAILED;
 495 }
 496
 497 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
 498 {
 499         if (iuer & ASLE_IUER_CONVERTIBLE)
 500                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
 501         else
 502                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
 503
 504         return ASLC_CONVERTIBLE_FAILED;
 505 }
 506
 507 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
 508 {
 509         if (iuer & ASLE_IUER_DOCKING)
 510                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
 511         else
 512                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
 513
 514         return ASLC_DOCKING_FAILED;
 515 }
 516
 517 static u32 asle_isct_state(struct drm_device *dev)
 518 {
 519         DRM_DEBUG_DRIVER("ISCT is not supported\n");
 520         return ASLC_ISCT_STATE_FAILED;
 521 }
 522
 523 static void asle_work(struct work_struct *work)
 524 {
 525         struct intel_opregion *opregion =
 526                 container_of(work, struct intel_opregion, asle_work);
 527         struct drm_i915_private *dev_priv =
 528                 container_of(opregion, struct drm_i915_private, opregion);
 529         struct drm_device *dev = dev_priv->dev;
 530         struct opregion_asle *asle = dev_priv->opregion.asle;
 531         u32 aslc_stat = 0;
 532         u32 aslc_req;
 533
 534         if (!asle)
 535                 return;
 536
 537         aslc_req = asle->aslc;
 538
 539         if (!(aslc_req & ASLC_REQ_MSK)) {
 540                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
 541                                  aslc_req);
 542                 return;
 543         }
 544
 545         if (aslc_req & ASLC_SET_ALS_ILLUM)
 546                 aslc_stat |= asle_set_als_illum(dev, asle->alsi);
 547
 548         if (aslc_req & ASLC_SET_BACKLIGHT)
 549                 aslc_stat |= asle_set_backlight(dev, asle->bclp);
 550
 551         if (aslc_req & ASLC_SET_PFIT)
 552                 aslc_stat |= asle_set_pfit(dev, asle->pfit);
 553
 554         if (aslc_req & ASLC_SET_PWM_FREQ)
 555                 aslc_stat |= asle_set_pwm_freq(dev, asle->pfmb);
 556
 557         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
 558                 aslc_stat |= asle_set_supported_rotation_angles(dev,
 559                                                         asle->srot);
 560
 561         if (aslc_req & ASLC_BUTTON_ARRAY)
 562                 aslc_stat |= asle_set_button_array(dev, asle->iuer);
 563
 564         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
 565                 aslc_stat |= asle_set_convertible(dev, asle->iuer);
 566
 567         if (aslc_req & ASLC_DOCKING_INDICATOR)
 568                 aslc_stat |= asle_set_docking(dev, asle->iuer);
 569
 570         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
 571                 aslc_stat |= asle_isct_state(dev);
 572
 573         asle->aslc = aslc_stat;
 574 }
 575
 576 void intel_opregion_asle_intr(struct drm_device *dev)
 577 {
 578         struct drm_i915_private *dev_priv = dev->dev_private;
 579
 580         if (dev_priv->opregion.asle)
 581                 schedule_work(&dev_priv->opregion.asle_work);
 582 }
 583
 584 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 585 #define ACPI_EV_LID            (1<<1)
 586 #define ACPI_EV_DOCK           (1<<2)
 587
 588 static struct intel_opregion *system_opregion;
 589
 590 #if 0
 591 static int intel_opregion_video_event(struct notifier_block *nb,
 592                                       unsigned long val, void *data)
 593 {
 594         /* The only video events relevant to opregion are 0x80. These indicate
 595            either a docking event, lid switch or display switch request. In
 596            Linux, these are handled by the dock, button and video drivers.
 597         */
 598
 599         struct acpi_bus_event *event = data;
 600         struct opregion_acpi *acpi;
 601         int ret = NOTIFY_OK;
 602
 603         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 604                 return NOTIFY_DONE;
 605
 606         if (!system_opregion)
 607                 return NOTIFY_DONE;
 608
 609         acpi = system_opregion->acpi;
 610
 611         if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
 612                 ret = NOTIFY_BAD;
 613
 614         acpi->csts = 0;
 615
 616         return ret;
 617 }
 618
 619 static struct notifier_block intel_opregion_notifier = {
 620         .notifier_call = intel_opregion_video_event,
 621 };
 622 #endif
 623
 624 static int acpi_is_video_device(ACPI_HANDLE devh) {
 625         ACPI_HANDLE h;
 626         if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
 627             ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) {
 628                 return 0;
 629         }
 630         return 1;
 631 }
 632
 633 /*
 634  * Initialise the DIDL field in opregion. This passes a list of devices to
 635  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 636  * (version 3)
 637  */
 638
 639 static u32 get_did(struct intel_opregion *opregion, int i)
 640 {
 641         u32 did;
 642
 643         if (i < ARRAY_SIZE(opregion->acpi->didl)) {
 644                 did = opregion->acpi->didl[i];
 645         } else {
 646                 i -= ARRAY_SIZE(opregion->acpi->didl);
 647
 648                 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
 649                         return 0;
 650
 651                 did = opregion->acpi->did2[i];
 652         }
 653
 654         return did;
 655 }
 656
 657 static void set_did(struct intel_opregion *opregion, int i, u32 val)
 658 {
 659         if (i < ARRAY_SIZE(opregion->acpi->didl)) {
 660                 opregion->acpi->didl[i] = val;
 661         } else {
 662                 i -= ARRAY_SIZE(opregion->acpi->didl);
 663
 664                 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
 665                         return;
 666
 667                 opregion->acpi->did2[i] = val;
 668         }
 669 }
 670
 671 static void intel_didl_outputs(struct drm_device *dev)
 672 {
 673         struct drm_i915_private *dev_priv = dev->dev_private;
 674         struct intel_opregion *opregion = &dev_priv->opregion;
 675         struct drm_connector *connector;
 676         ACPI_HANDLE handle, acpi_cdev, acpi_video_bus;
 677         u32 device_id;
 678         ACPI_STATUS status;
 679         u32 temp, max_outputs;
 680         int i = 0;
 681
 682         handle = acpi_get_handle(dev->dev->bsddev);
 683         if (!handle)
 684                 return;
 685
 686         if (acpi_is_video_device(handle))
 687                 acpi_video_bus = handle;
 688         else {
 689                 acpi_cdev = NULL;
 690                 acpi_video_bus = NULL;
 691                 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev,
 692                                          &acpi_cdev) != AE_NOT_FOUND) {
 693                         if (acpi_is_video_device(acpi_cdev)) {
 694                                 acpi_video_bus = acpi_cdev;
 695                                 break;
 696                         }
 697                 }
 698         }
 699
 700         if (!acpi_video_bus) {
 701                 DRM_ERROR("No ACPI video bus found\n");
 702                 return;
 703         }
 704
 705         /*
 706          * In theory, did2, the extended didl, gets added at opregion version
 707          * 3.0. In practice, however, we're supposed to set it for earlier
 708          * versions as well, since a BIOS that doesn't understand did2 should
 709          * not look at it anyway. Use a variable so we can tweak this if a need
 710          * arises later.
 711          */
 712         max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
 713                 ARRAY_SIZE(opregion->acpi->did2);
 714
 715         while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev,
 716                                  &acpi_cdev) != AE_NOT_FOUND) {
 717                 if (i >= max_outputs) {
 718                         DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
 719                                       max_outputs);
 720                         return;
 721                 }
 722                 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id);
 723                 if (ACPI_SUCCESS(status)) {
 724                         if (!device_id)
 725                                 goto blind_set;
 726                         set_did(opregion, i++, (u32)(device_id & 0x0f0f));
 727                 }
 728         }
 729
 730 end:
 731         DRM_DEBUG_KMS("%d outputs detected\n", i);
 732
 733         /* If fewer than max outputs, the list must be null terminated */
 734         if (i < max_outputs)
 735                 set_did(opregion, i, 0);
 736         return;
 737
 738 blind_set:
 739         i = 0;
 740         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 741                 int output_type = ACPI_OTHER_OUTPUT;
 742                 if (i >= max_outputs) {
 743                         DRM_DEBUG_KMS("More than %u outputs in connector list\n",
 744                                       max_outputs);
 745                         return;
 746                 }
 747                 switch (connector->connector_type) {
 748                 case DRM_MODE_CONNECTOR_VGA:
 749                 case DRM_MODE_CONNECTOR_DVIA:
 750                         output_type = ACPI_VGA_OUTPUT;
 751                         break;
 752                 case DRM_MODE_CONNECTOR_Composite:
 753                 case DRM_MODE_CONNECTOR_SVIDEO:
 754                 case DRM_MODE_CONNECTOR_Component:
 755                 case DRM_MODE_CONNECTOR_9PinDIN:
 756                         output_type = ACPI_TV_OUTPUT;
 757                         break;
 758                 case DRM_MODE_CONNECTOR_DVII:
 759                 case DRM_MODE_CONNECTOR_DVID:
 760                 case DRM_MODE_CONNECTOR_DisplayPort:
 761                 case DRM_MODE_CONNECTOR_HDMIA:
 762                 case DRM_MODE_CONNECTOR_HDMIB:
 763                         output_type = ACPI_DIGITAL_OUTPUT;
 764                         break;
 765                 case DRM_MODE_CONNECTOR_LVDS:
 766                         output_type = ACPI_LVDS_OUTPUT;
 767                         break;
 768                 }
 769                 temp = get_did(opregion, i);
 770                 set_did(opregion, i, temp | (1 << 31) | output_type | i);
 771                 i++;
 772         }
 773         goto end;
 774 }
 775
 776 static void intel_setup_cadls(struct drm_device *dev)
 777 {
 778         struct drm_i915_private *dev_priv = dev->dev_private;
 779         struct intel_opregion *opregion = &dev_priv->opregion;
 780         int i = 0;
 781         u32 disp_id;
 782
 783         /* Initialize the CADL field by duplicating the DIDL values.
 784          * Technically, this is not always correct as display outputs may exist,
 785          * but not active. This initialization is necessary for some Clevo
 786          * laptops that check this field before processing the brightness and
 787          * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
 788          * there are less than eight devices. */
 789         do {
 790                 disp_id = get_did(opregion, i);
 791                 opregion->acpi->cadl[i] = disp_id;
 792         } while (++i < 8 && disp_id != 0);
 793 }
 794
 795 void intel_opregion_init(struct drm_device *dev)
 796 {
 797         struct drm_i915_private *dev_priv = dev->dev_private;
 798         struct intel_opregion *opregion = &dev_priv->opregion;
 799
 800         if (!opregion->header)
 801                 return;
 802
 803         if (opregion->acpi) {
 804                 intel_didl_outputs(dev);
 805                 intel_setup_cadls(dev);
 806
 807                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
 808                  * Right now, all the events are handled by the ACPI video module.
 809                  * We don't actually need to do anything with them. */
 810                 opregion->acpi->csts = 0;
 811                 opregion->acpi->drdy = 1;
 812
 813                 system_opregion = opregion;
 814         }
 815
 816         if (opregion->asle) {
 817                 opregion->asle->tche = ASLE_TCHE_BLC_EN;
 818                 opregion->asle->ardy = ASLE_ARDY_READY;
 819         }
 820 }
 821
 822 void intel_opregion_fini(struct drm_device *dev)
 823 {
 824         struct drm_i915_private *dev_priv = dev->dev_private;
 825         struct intel_opregion *opregion = &dev_priv->opregion;
 826
 827         if (!opregion->header)
 828                 return;
 829
 830         if (opregion->asle)
 831                 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
 832
 833         cancel_work_sync(&dev_priv->opregion.asle_work);
 834
 835         if (opregion->acpi) {
 836                 opregion->acpi->drdy = 0;
 837
 838                 system_opregion = NULL;
 839         }
 840
 841         /* just clear all opregion memory pointers now */
 842         iounmap(opregion->header);
 843         opregion->header = NULL;
 844         opregion->acpi = NULL;
 845         opregion->swsci = NULL;
 846         opregion->asle = NULL;
 847         opregion->vbt = NULL;
 848         opregion->lid_state = NULL;
 849 }
 850
 851 static void swsci_setup(struct drm_device *dev)
 852 {
 853         struct drm_i915_private *dev_priv = dev->dev_private;
 854         struct intel_opregion *opregion = &dev_priv->opregion;
 855         bool requested_callbacks = false;
 856         u32 tmp;
 857
 858         /* Sub-function code 0 is okay, let's allow them. */
 859         opregion->swsci_gbda_sub_functions = 1;
 860         opregion->swsci_sbcb_sub_functions = 1;
 861
 862         /* We use GBDA to ask for supported GBDA calls. */
 863         if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
 864                 /* make the bits match the sub-function codes */
 865                 tmp <<= 1;
 866                 opregion->swsci_gbda_sub_functions |= tmp;
 867         }
 868
 869         /*
 870          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
 871          * must not call interfaces that are not specifically requested by the
 872          * bios.
 873          */
 874         if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
 875                 /* here, the bits already match sub-function codes */
 876                 opregion->swsci_sbcb_sub_functions |= tmp;
 877                 requested_callbacks = true;
 878         }
 879
 880         /*
 881          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
 882          * the callback is _requested_. But we still can't call interfaces that
 883          * are not requested.
 884          */
 885         if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
 886                 /* make the bits match the sub-function codes */
 887                 u32 low = tmp & 0x7ff;
 888                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
 889                 tmp = (high << 4) | (low << 1) | 1;
 890
 891                 /* best guess what to do with supported wrt requested */
 892                 if (requested_callbacks) {
 893                         u32 req = opregion->swsci_sbcb_sub_functions;
 894                         if ((req & tmp) != req)
 895                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
 896                         /* XXX: for now, trust the requested callbacks */
 897                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
 898                 } else {
 899                         opregion->swsci_sbcb_sub_functions |= tmp;
 900                 }
 901         }
 902
 903         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
 904                          opregion->swsci_gbda_sub_functions,
 905                          opregion->swsci_sbcb_sub_functions);
 906 }
 907 #else /* CONFIG_ACPI */
 908 static inline void swsci_setup(struct drm_device *dev) {}
 909 #endif  /* CONFIG_ACPI */
 910
 911 int intel_opregion_setup(struct drm_device *dev)
 912 {
 913         struct drm_i915_private *dev_priv = dev->dev_private;
 914         struct intel_opregion *opregion = &dev_priv->opregion;
 915         u32 asls, mboxes;
 916         char buf[sizeof(OPREGION_SIGNATURE)];
 917         int err = 0;
 918         char *base;
 919
 920         BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
 921         BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
 922         BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
 923         BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
 924
 925         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 926         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 927         if (asls == 0) {
 928                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 929                 return -ENOTSUP;
 930         }
 931
 932 #ifdef CONFIG_ACPI
 933         INIT_WORK(&opregion->asle_work, asle_work);
 934 #endif
 935
 936         base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
 937         if (!base)
 938                 return -ENOMEM;
 939
 940         memcpy(buf, base, sizeof(buf));
 941
 942         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 943                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 944                 err = -EINVAL;
 945                 goto err_out;
 946         }
 947         opregion->header = (struct opregion_header *)base;
 948         opregion->vbt = base + OPREGION_VBT_OFFSET;
 949
 950         opregion->lid_state = (u32 *)(base + ACPI_CLID);
 951
 952         mboxes = opregion->header->mboxes;
 953         if (mboxes & MBOX_ACPI) {
 954                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 955                 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET);
 956         }
 957
 958         if (mboxes & MBOX_SWSCI) {
 959                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 960                 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET);
 961                 swsci_setup(dev);
 962         }
 963         if (mboxes & MBOX_ASLE) {
 964                 DRM_DEBUG_DRIVER("ASLE supported\n");
 965                 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET);
 966
 967                 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
 968         }
 969
 970         return 0;
 971
 972 err_out:
 973         iounmap(base);
 974         return err;
 975 }