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
  56 struct opregion_header {
  57         u8 signature[16];
  58         u32 size;
  59         u32 opregion_ver;
  60         u8 bios_ver[32];
  61         u8 vbios_ver[16];
  62         u8 driver_ver[16];
  63         u32 mboxes;
  64         u8 reserved[164];
  65 } __packed;
  66
  67 /* OpRegion mailbox #1: public ACPI methods */
  68 struct opregion_acpi {
  69         u32 drdy;       /* driver readiness */
  70         u32 csts;       /* notification status */
  71         u32 cevt;       /* current event */
  72         u8 rsvd1[20];
  73         u32 didl[8];    /* supported display devices ID list */
  74         u32 cpdl[8];    /* currently presented display list */
  75         u32 cadl[8];    /* currently active display list */
  76         u32 nadl[8];    /* next active devices list */
  77         u32 aslp;       /* ASL sleep time-out */
  78         u32 tidx;       /* toggle table index */
  79         u32 chpd;       /* current hotplug enable indicator */
  80         u32 clid;       /* current lid state*/
  81         u32 cdck;       /* current docking state */
  82         u32 sxsw;       /* Sx state resume */
  83         u32 evts;       /* ASL supported events */
  84         u32 cnot;       /* current OS notification */
  85         u32 nrdy;       /* driver status */
  86         u8 rsvd2[60];
  87 } __packed;
  88
  89 /* OpRegion mailbox #2: SWSCI */
  90 struct opregion_swsci {
  91         u32 scic;       /* SWSCI command|status|data */
  92         u32 parm;       /* command parameters */
  93         u32 dslp;       /* driver sleep time-out */
  94         u8 rsvd[244];
  95 } __packed;
  96
  97 /* OpRegion mailbox #3: ASLE */
  98 struct opregion_asle {
  99         u32 ardy;       /* driver readiness */
 100         u32 aslc;       /* ASLE interrupt command */
 101         u32 tche;       /* technology enabled indicator */
 102         u32 alsi;       /* current ALS illuminance reading */
 103         u32 bclp;       /* backlight brightness to set */
 104         u32 pfit;       /* panel fitting state */
 105         u32 cblv;       /* current brightness level */
 106         u16 bclm[20];   /* backlight level duty cycle mapping table */
 107         u32 cpfm;       /* current panel fitting mode */
 108         u32 epfm;       /* enabled panel fitting modes */
 109         u8 plut[74];    /* panel LUT and identifier */
 110         u32 pfmb;       /* PWM freq and min brightness */
 111         u32 cddv;       /* color correction default values */
 112         u32 pcft;       /* power conservation features */
 113         u32 srot;       /* supported rotation angles */
 114         u32 iuer;       /* IUER events */
 115         u8 rsvd[86];
 116 } __packed;
 117
 118 /* Driver readiness indicator */
 119 #define ASLE_ARDY_READY         (1 << 0)
 120 #define ASLE_ARDY_NOT_READY     (0 << 0)
 121
 122 /* ASLE Interrupt Command (ASLC) bits */
 123 #define ASLC_SET_ALS_ILLUM              (1 << 0)
 124 #define ASLC_SET_BACKLIGHT              (1 << 1)
 125 #define ASLC_SET_PFIT                   (1 << 2)
 126 #define ASLC_SET_PWM_FREQ               (1 << 3)
 127 #define ASLC_SUPPORTED_ROTATION_ANGLES  (1 << 4)
 128 #define ASLC_BUTTON_ARRAY               (1 << 5)
 129 #define ASLC_CONVERTIBLE_INDICATOR      (1 << 6)
 130 #define ASLC_DOCKING_INDICATOR          (1 << 7)
 131 #define ASLC_ISCT_STATE_CHANGE          (1 << 8)
 132 #define ASLC_REQ_MSK                    0x1ff
 133 /* response bits */
 134 #define ASLC_ALS_ILLUM_FAILED           (1 << 10)
 135 #define ASLC_BACKLIGHT_FAILED           (1 << 12)
 136 #define ASLC_PFIT_FAILED                (1 << 14)
 137 #define ASLC_PWM_FREQ_FAILED            (1 << 16)
 138 #define ASLC_ROTATION_ANGLES_FAILED     (1 << 18)
 139 #define ASLC_BUTTON_ARRAY_FAILED        (1 << 20)
 140 #define ASLC_CONVERTIBLE_FAILED         (1 << 22)
 141 #define ASLC_DOCKING_FAILED             (1 << 24)
 142 #define ASLC_ISCT_STATE_FAILED          (1 << 26)
 143
 144 /* Technology enabled indicator */
 145 #define ASLE_TCHE_ALS_EN        (1 << 0)
 146 #define ASLE_TCHE_BLC_EN        (1 << 1)
 147 #define ASLE_TCHE_PFIT_EN       (1 << 2)
 148 #define ASLE_TCHE_PFMB_EN       (1 << 3)
 149
 150 /* ASLE backlight brightness to set */
 151 #define ASLE_BCLP_VALID                (1<<31)
 152 #define ASLE_BCLP_MSK          (~(1<<31))
 153
 154 /* ASLE panel fitting request */
 155 #define ASLE_PFIT_VALID         (1<<31)
 156 #define ASLE_PFIT_CENTER (1<<0)
 157 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
 158 #define ASLE_PFIT_STRETCH_GFX (1<<2)
 159
 160 /* PWM frequency and minimum brightness */
 161 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
 162 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
 163 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
 164 #define ASLE_PFMB_PWM_VALID (1<<31)
 165
 166 #define ASLE_CBLV_VALID         (1<<31)
 167
 168 /* IUER */
 169 #define ASLE_IUER_DOCKING               (1 << 7)
 170 #define ASLE_IUER_CONVERTIBLE           (1 << 6)
 171 #define ASLE_IUER_ROTATION_LOCK_BTN     (1 << 4)
 172 #define ASLE_IUER_VOLUME_DOWN_BTN       (1 << 3)
 173 #define ASLE_IUER_VOLUME_UP_BTN         (1 << 2)
 174 #define ASLE_IUER_WINDOWS_BTN           (1 << 1)
 175 #define ASLE_IUER_POWER_BTN             (1 << 0)
 176
 177 /* Software System Control Interrupt (SWSCI) */
 178 #define SWSCI_SCIC_INDICATOR            (1 << 0)
 179 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT  1
 180 #define SWSCI_SCIC_MAIN_FUNCTION_MASK   (0xf << 1)
 181 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT   8
 182 #define SWSCI_SCIC_SUB_FUNCTION_MASK    (0xff << 8)
 183 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
 184 #define SWSCI_SCIC_EXIT_PARAMETER_MASK  (0xff << 8)
 185 #define SWSCI_SCIC_EXIT_STATUS_SHIFT    5
 186 #define SWSCI_SCIC_EXIT_STATUS_MASK     (7 << 5)
 187 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS  1
 188
 189 #define SWSCI_FUNCTION_CODE(main, sub) \
 190         ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
 191          (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
 192
 193 /* SWSCI: Get BIOS Data (GBDA) */
 194 #define SWSCI_GBDA                      4
 195 #define SWSCI_GBDA_SUPPORTED_CALLS      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
 196 #define SWSCI_GBDA_REQUESTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
 197 #define SWSCI_GBDA_BOOT_DISPLAY_PREF    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
 198 #define SWSCI_GBDA_PANEL_DETAILS        SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
 199 #define SWSCI_GBDA_TV_STANDARD          SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
 200 #define SWSCI_GBDA_INTERNAL_GRAPHICS    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
 201 #define SWSCI_GBDA_SPREAD_SPECTRUM      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
 202
 203 /* SWSCI: System BIOS Callbacks (SBCB) */
 204 #define SWSCI_SBCB                      6
 205 #define SWSCI_SBCB_SUPPORTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
 206 #define SWSCI_SBCB_INIT_COMPLETION      SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
 207 #define SWSCI_SBCB_PRE_HIRES_SET_MODE   SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
 208 #define SWSCI_SBCB_POST_HIRES_SET_MODE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
 209 #define SWSCI_SBCB_DISPLAY_SWITCH       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
 210 #define SWSCI_SBCB_SET_TV_FORMAT        SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
 211 #define SWSCI_SBCB_ADAPTER_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
 212 #define SWSCI_SBCB_DISPLAY_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
 213 #define SWSCI_SBCB_SET_BOOT_DISPLAY     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
 214 #define SWSCI_SBCB_SET_PANEL_DETAILS    SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
 215 #define SWSCI_SBCB_SET_INTERNAL_GFX     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
 216 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
 217 #define SWSCI_SBCB_SUSPEND_RESUME       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
 218 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
 219 #define SWSCI_SBCB_POST_VBE_PM          SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
 220 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
 221
 222 #define ACPI_OTHER_OUTPUT (0<<8)
 223 #define ACPI_VGA_OUTPUT (1<<8)
 224 #define ACPI_TV_OUTPUT (2<<8)
 225 #define ACPI_DIGITAL_OUTPUT (3<<8)
 226 #define ACPI_LVDS_OUTPUT (4<<8)
 227
 228 #define MAX_DSLP        1500
 229
 230 #ifdef CONFIG_ACPI
 231 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
 232 {
 233         struct drm_i915_private *dev_priv = dev->dev_private;
 234         struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
 235         u32 main_function, sub_function, scic;
 236         u16 pci_swsci;
 237         u32 dslp;
 238
 239         if (!swsci)
 240                 return -ENODEV;
 241
 242         main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
 243                 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
 244         sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
 245                 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
 246
 247         /* Check if we can call the function. See swsci_setup for details. */
 248         if (main_function == SWSCI_SBCB) {
 249                 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
 250                      (1 << sub_function)) == 0)
 251                         return -EINVAL;
 252         } else if (main_function == SWSCI_GBDA) {
 253                 if ((dev_priv->opregion.swsci_gbda_sub_functions &
 254                      (1 << sub_function)) == 0)
 255                         return -EINVAL;
 256         }
 257
 258         /* Driver sleep timeout in ms. */
 259         dslp = ioread32(&swsci->dslp);
 260         if (!dslp) {
 261                 /* The spec says 2ms should be the default, but it's too small
 262                  * for some machines. */
 263                 dslp = 50;
 264         } else if (dslp > MAX_DSLP) {
 265                 /* Hey bios, trust must be earned. */
 266                 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
 267                               "using %u ms instead\n", dslp, MAX_DSLP);
 268                 dslp = MAX_DSLP;
 269         }
 270
 271         /* The spec tells us to do this, but we are the only user... */
 272         scic = ioread32(&swsci->scic);
 273         if (scic & SWSCI_SCIC_INDICATOR) {
 274                 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
 275                 return -EBUSY;
 276         }
 277
 278         scic = function | SWSCI_SCIC_INDICATOR;
 279
 280         iowrite32(parm, &swsci->parm);
 281         iowrite32(scic, &swsci->scic);
 282
 283         /* Ensure SCI event is selected and event trigger is cleared. */
 284         pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
 285         if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
 286                 pci_swsci |= PCI_SWSCI_SCISEL;
 287                 pci_swsci &= ~PCI_SWSCI_GSSCIE;
 288                 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
 289         }
 290
 291         /* Use event trigger to tell bios to check the mail. */
 292         pci_swsci |= PCI_SWSCI_GSSCIE;
 293         pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
 294
 295         /* Poll for the result. */
 296 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
 297         if (wait_for(C, dslp)) {
 298                 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
 299                 return -ETIMEDOUT;
 300         }
 301
 302         scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
 303                 SWSCI_SCIC_EXIT_STATUS_SHIFT;
 304
 305         /* Note: scic == 0 is an error! */
 306         if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
 307                 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
 308                 return -EIO;
 309         }
 310
 311         if (parm_out)
 312                 *parm_out = ioread32(&swsci->parm);
 313
 314         return 0;
 315
 316 #undef C
 317 }
 318
 319 #define DISPLAY_TYPE_CRT                        0
 320 #define DISPLAY_TYPE_TV                         1
 321 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL        2
 322 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL        3
 323
 324 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 325                                   bool enable)
 326 {
 327         struct drm_device *dev = intel_encoder->base.dev;
 328         u32 parm = 0;
 329         u32 type = 0;
 330         u32 port;
 331
 332         /* don't care about old stuff for now */
 333         if (!HAS_DDI(dev))
 334                 return 0;
 335
 336         port = intel_ddi_get_encoder_port(intel_encoder);
 337         if (port == PORT_E) {
 338                 port = 0;
 339         } else {
 340                 parm |= 1 << port;
 341                 port++;
 342         }
 343
 344         if (!enable)
 345                 parm |= 4 << 8;
 346
 347         switch (intel_encoder->type) {
 348         case INTEL_OUTPUT_ANALOG:
 349                 type = DISPLAY_TYPE_CRT;
 350                 break;
 351         case INTEL_OUTPUT_UNKNOWN:
 352         case INTEL_OUTPUT_DISPLAYPORT:
 353         case INTEL_OUTPUT_HDMI:
 354                 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
 355                 break;
 356         case INTEL_OUTPUT_EDP:
 357                 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
 358                 break;
 359         default:
 360                 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
 361                           intel_encoder->type);
 362                 return -EINVAL;
 363         }
 364
 365         parm |= type << (16 + port * 3);
 366
 367         return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
 368 }
 369
 370 static const struct {
 371         pci_power_t pci_power_state;
 372         u32 parm;
 373 } power_state_map[] = {
 374         { PCI_D0,       0x00 },
 375         { PCI_D1,       0x01 },
 376         { PCI_D2,       0x02 },
 377         { PCI_D3hot,    0x04 },
 378         { PCI_D3cold,   0x04 },
 379 };
 380
 381 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
 382 {
 383         int i;
 384
 385         if (!HAS_DDI(dev))
 386                 return 0;
 387
 388         for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
 389                 if (state == power_state_map[i].pci_power_state)
 390                         return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
 391                                      power_state_map[i].parm, NULL);
 392         }
 393
 394         return -EINVAL;
 395 }
 396
 397 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 398 {
 399         struct drm_i915_private *dev_priv = dev->dev_private;
 400         struct intel_connector *intel_connector;
 401         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 402
 403         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
 404
 405         /*
 406          * If the acpi_video interface is not supposed to be used, don't
 407          * bother processing backlight level change requests from firmware.
 408          */
 409 #if 0
 410         if (!acpi_video_verify_backlight_support()) {
 411                 DRM_DEBUG_KMS("opregion backlight request ignored\n");
 412                 return 0;
 413         }
 414 #endif
 415
 416         if (!(bclp & ASLE_BCLP_VALID))
 417                 return ASLC_BACKLIGHT_FAILED;
 418
 419         bclp &= ASLE_BCLP_MSK;
 420         if (bclp > 255)
 421                 return ASLC_BACKLIGHT_FAILED;
 422
 423         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 424
 425         /*
 426          * Update backlight on all connectors that support backlight (usually
 427          * only one).
 428          */
 429         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
 430         list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
 431                 intel_panel_set_backlight(intel_connector, bclp, 255);
 432         iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
 433
 434         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 435
 436
 437         return 0;
 438 }
 439
 440 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
 441 {
 442         /* alsi is the current ALS reading in lux. 0 indicates below sensor
 443            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 444         DRM_DEBUG_DRIVER("Illum is not supported\n");
 445         return ASLC_ALS_ILLUM_FAILED;
 446 }
 447
 448 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
 449 {
 450         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 451         return ASLC_PWM_FREQ_FAILED;
 452 }
 453
 454 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
 455 {
 456         /* Panel fitting is currently controlled by the X code, so this is a
 457            noop until modesetting support works fully */
 458         DRM_DEBUG_DRIVER("Pfit is not supported\n");
 459         return ASLC_PFIT_FAILED;
 460 }
 461
 462 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
 463 {
 464         DRM_DEBUG_DRIVER("SROT is not supported\n");
 465         return ASLC_ROTATION_ANGLES_FAILED;
 466 }
 467
 468 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
 469 {
 470         if (!iuer)
 471                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
 472         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
 473                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
 474         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
 475                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
 476         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
 477                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
 478         if (iuer & ASLE_IUER_WINDOWS_BTN)
 479                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
 480         if (iuer & ASLE_IUER_POWER_BTN)
 481                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
 482
 483         return ASLC_BUTTON_ARRAY_FAILED;
 484 }
 485
 486 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
 487 {
 488         if (iuer & ASLE_IUER_CONVERTIBLE)
 489                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
 490         else
 491                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
 492
 493         return ASLC_CONVERTIBLE_FAILED;
 494 }
 495
 496 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
 497 {
 498         if (iuer & ASLE_IUER_DOCKING)
 499                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
 500         else
 501                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
 502
 503         return ASLC_DOCKING_FAILED;
 504 }
 505
 506 static u32 asle_isct_state(struct drm_device *dev)
 507 {
 508         DRM_DEBUG_DRIVER("ISCT is not supported\n");
 509         return ASLC_ISCT_STATE_FAILED;
 510 }
 511
 512 static void asle_work(struct work_struct *work)
 513 {
 514         struct intel_opregion *opregion =
 515                 container_of(work, struct intel_opregion, asle_work);
 516         struct drm_i915_private *dev_priv =
 517                 container_of(opregion, struct drm_i915_private, opregion);
 518         struct drm_device *dev = dev_priv->dev;
 519         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 520         u32 aslc_stat = 0;
 521         u32 aslc_req;
 522
 523         if (!asle)
 524                 return;
 525
 526         aslc_req = ioread32(&asle->aslc);
 527
 528         if (!(aslc_req & ASLC_REQ_MSK)) {
 529                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
 530                                  aslc_req);
 531                 return;
 532         }
 533
 534         if (aslc_req & ASLC_SET_ALS_ILLUM)
 535                 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
 536
 537         if (aslc_req & ASLC_SET_BACKLIGHT)
 538                 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
 539
 540         if (aslc_req & ASLC_SET_PFIT)
 541                 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
 542
 543         if (aslc_req & ASLC_SET_PWM_FREQ)
 544                 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
 545
 546         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
 547                 aslc_stat |= asle_set_supported_rotation_angles(dev,
 548                                                         ioread32(&asle->srot));
 549
 550         if (aslc_req & ASLC_BUTTON_ARRAY)
 551                 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
 552
 553         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
 554                 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
 555
 556         if (aslc_req & ASLC_DOCKING_INDICATOR)
 557                 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
 558
 559         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
 560                 aslc_stat |= asle_isct_state(dev);
 561
 562         iowrite32(aslc_stat, &asle->aslc);
 563 }
 564
 565 void intel_opregion_asle_intr(struct drm_device *dev)
 566 {
 567         struct drm_i915_private *dev_priv = dev->dev_private;
 568
 569         if (dev_priv->opregion.asle)
 570                 schedule_work(&dev_priv->opregion.asle_work);
 571 }
 572
 573 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 574 #define ACPI_EV_LID            (1<<1)
 575 #define ACPI_EV_DOCK           (1<<2)
 576
 577 static struct intel_opregion *system_opregion;
 578
 579 #if 0
 580 static int intel_opregion_video_event(struct notifier_block *nb,
 581                                       unsigned long val, void *data)
 582 {
 583         /* The only video events relevant to opregion are 0x80. These indicate
 584            either a docking event, lid switch or display switch request. In
 585            Linux, these are handled by the dock, button and video drivers.
 586         */
 587
 588         struct opregion_acpi __iomem *acpi;
 589         struct acpi_bus_event *event = data;
 590         int ret = NOTIFY_OK;
 591
 592         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 593                 return NOTIFY_DONE;
 594
 595         if (!system_opregion)
 596                 return NOTIFY_DONE;
 597
 598         acpi = system_opregion->acpi;
 599
 600         if (event->type == 0x80 &&
 601             (ioread32(&acpi->cevt) & 1) == 0)
 602                 ret = NOTIFY_BAD;
 603
 604         iowrite32(0, &acpi->csts);
 605
 606         return ret;
 607 }
 608
 609 static struct notifier_block intel_opregion_notifier = {
 610         .notifier_call = intel_opregion_video_event,
 611 };
 612 #endif
 613
 614 static int acpi_is_video_device(ACPI_HANDLE devh) {
 615         ACPI_HANDLE h;
 616         if (ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
 617             ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h))) {
 618                 return 0;
 619         }
 620         return 1;
 621 }
 622
 623 /*
 624  * Initialise the DIDL field in opregion. This passes a list of devices to
 625  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 626  * (version 3)
 627  */
 628
 629 static void intel_didl_outputs(struct drm_device *dev)
 630 {
 631         struct drm_i915_private *dev_priv = dev->dev_private;
 632         struct intel_opregion *opregion = &dev_priv->opregion;
 633         struct drm_connector *connector;
 634         ACPI_HANDLE handle, acpi_cdev, acpi_video_bus;
 635         u32 device_id;
 636         ACPI_STATUS status;
 637         u32 temp;
 638         int i = 0;
 639
 640         handle = acpi_get_handle(dev->dev);
 641         if (!handle)
 642                 return;
 643
 644         if (acpi_is_video_device(handle))
 645                 acpi_video_bus = handle;
 646         else {
 647                 acpi_cdev = NULL;
 648                 acpi_video_bus = NULL;
 649                 while (AcpiGetNextObject(ACPI_TYPE_DEVICE, handle, acpi_cdev,
 650                                          &acpi_cdev) != AE_NOT_FOUND) {
 651                         if (acpi_is_video_device(acpi_cdev)) {
 652                                 acpi_video_bus = acpi_cdev;
 653                                 break;
 654                         }
 655                 }
 656         }
 657
 658         if (!acpi_video_bus) {
 659                 pr_warn("No ACPI video bus found\n");
 660                 return;
 661         }
 662
 663         acpi_cdev = NULL;
 664         while (AcpiGetNextObject(ACPI_TYPE_DEVICE, acpi_video_bus, acpi_cdev,
 665                                  &acpi_cdev) != AE_NOT_FOUND) {
 666                 if (i >= 8) {
 667                         device_printf(dev->dev,
 668                                    "More than 8 outputs detected via ACPI\n");
 669                         return;
 670                 }
 671                 status = acpi_GetInteger(acpi_cdev, "_ADR", &device_id);
 672                 if (ACPI_SUCCESS(status)) {
 673                         if (!device_id)
 674                                 goto blind_set;
 675                         iowrite32((u32)(device_id & 0x0f0f),
 676                                   &opregion->acpi->didl[i]);
 677                         i++;
 678                 }
 679         }
 680
 681 end:
 682         /* If fewer than 8 outputs, the list must be null terminated */
 683         if (i < 8)
 684                 iowrite32(0, &opregion->acpi->didl[i]);
 685         return;
 686
 687 blind_set:
 688         i = 0;
 689         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 690                 int output_type = ACPI_OTHER_OUTPUT;
 691                 if (i >= 8) {
 692                         device_printf(dev->dev,
 693                                 "More than 8 outputs in connector list\n");
 694                         return;
 695                 }
 696                 switch (connector->connector_type) {
 697                 case DRM_MODE_CONNECTOR_VGA:
 698                 case DRM_MODE_CONNECTOR_DVIA:
 699                         output_type = ACPI_VGA_OUTPUT;
 700                         break;
 701                 case DRM_MODE_CONNECTOR_Composite:
 702                 case DRM_MODE_CONNECTOR_SVIDEO:
 703                 case DRM_MODE_CONNECTOR_Component:
 704                 case DRM_MODE_CONNECTOR_9PinDIN:
 705                         output_type = ACPI_TV_OUTPUT;
 706                         break;
 707                 case DRM_MODE_CONNECTOR_DVII:
 708                 case DRM_MODE_CONNECTOR_DVID:
 709                 case DRM_MODE_CONNECTOR_DisplayPort:
 710                 case DRM_MODE_CONNECTOR_HDMIA:
 711                 case DRM_MODE_CONNECTOR_HDMIB:
 712                         output_type = ACPI_DIGITAL_OUTPUT;
 713                         break;
 714                 case DRM_MODE_CONNECTOR_LVDS:
 715                         output_type = ACPI_LVDS_OUTPUT;
 716                         break;
 717                 }
 718                 temp = ioread32(&opregion->acpi->didl[i]);
 719                 iowrite32(temp | (1<<31) | output_type | i,
 720                           &opregion->acpi->didl[i]);
 721                 i++;
 722         }
 723         goto end;
 724 }
 725
 726 static void intel_setup_cadls(struct drm_device *dev)
 727 {
 728         struct drm_i915_private *dev_priv = dev->dev_private;
 729         struct intel_opregion *opregion = &dev_priv->opregion;
 730         int i = 0;
 731         u32 disp_id;
 732
 733         /* Initialize the CADL field by duplicating the DIDL values.
 734          * Technically, this is not always correct as display outputs may exist,
 735          * but not active. This initialization is necessary for some Clevo
 736          * laptops that check this field before processing the brightness and
 737          * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
 738          * there are less than eight devices. */
 739         do {
 740                 disp_id = ioread32(&opregion->acpi->didl[i]);
 741                 iowrite32(disp_id, &opregion->acpi->cadl[i]);
 742         } while (++i < 8 && disp_id != 0);
 743 }
 744
 745 void intel_opregion_init(struct drm_device *dev)
 746 {
 747         struct drm_i915_private *dev_priv = dev->dev_private;
 748         struct intel_opregion *opregion = &dev_priv->opregion;
 749
 750         if (!opregion->header)
 751                 return;
 752
 753         if (opregion->acpi) {
 754                 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 755                         intel_didl_outputs(dev);
 756                         intel_setup_cadls(dev);
 757                 }
 758
 759                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
 760                  * Right now, all the events are handled by the ACPI video module.
 761                  * We don't actually need to do anything with them. */
 762                 iowrite32(0, &opregion->acpi->csts);
 763                 iowrite32(1, &opregion->acpi->drdy);
 764
 765                 system_opregion = opregion;
 766         }
 767
 768         if (opregion->asle) {
 769                 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
 770                 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
 771         }
 772 }
 773
 774 void intel_opregion_fini(struct drm_device *dev)
 775 {
 776         struct drm_i915_private *dev_priv = dev->dev_private;
 777         struct intel_opregion *opregion = &dev_priv->opregion;
 778
 779         if (!opregion->header)
 780                 return;
 781
 782         if (opregion->asle)
 783                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 784
 785         cancel_work_sync(&dev_priv->opregion.asle_work);
 786
 787         if (opregion->acpi) {
 788                 iowrite32(0, &opregion->acpi->drdy);
 789
 790                 system_opregion = NULL;
 791         }
 792
 793         /* just clear all opregion memory pointers now */
 794         pmap_unmapdev((vm_offset_t)opregion->header, OPREGION_SIZE);
 795         opregion->header = NULL;
 796         opregion->acpi = NULL;
 797         opregion->swsci = NULL;
 798         opregion->asle = NULL;
 799         opregion->vbt = NULL;
 800         opregion->lid_state = NULL;
 801 }
 802
 803 static void swsci_setup(struct drm_device *dev)
 804 {
 805         struct drm_i915_private *dev_priv = dev->dev_private;
 806         struct intel_opregion *opregion = &dev_priv->opregion;
 807         bool requested_callbacks = false;
 808         u32 tmp;
 809
 810         /* Sub-function code 0 is okay, let's allow them. */
 811         opregion->swsci_gbda_sub_functions = 1;
 812         opregion->swsci_sbcb_sub_functions = 1;
 813
 814         /* We use GBDA to ask for supported GBDA calls. */
 815         if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
 816                 /* make the bits match the sub-function codes */
 817                 tmp <<= 1;
 818                 opregion->swsci_gbda_sub_functions |= tmp;
 819         }
 820
 821         /*
 822          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
 823          * must not call interfaces that are not specifically requested by the
 824          * bios.
 825          */
 826         if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
 827                 /* here, the bits already match sub-function codes */
 828                 opregion->swsci_sbcb_sub_functions |= tmp;
 829                 requested_callbacks = true;
 830         }
 831
 832         /*
 833          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
 834          * the callback is _requested_. But we still can't call interfaces that
 835          * are not requested.
 836          */
 837         if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
 838                 /* make the bits match the sub-function codes */
 839                 u32 low = tmp & 0x7ff;
 840                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
 841                 tmp = (high << 4) | (low << 1) | 1;
 842
 843                 /* best guess what to do with supported wrt requested */
 844                 if (requested_callbacks) {
 845                         u32 req = opregion->swsci_sbcb_sub_functions;
 846                         if ((req & tmp) != req)
 847                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
 848                         /* XXX: for now, trust the requested callbacks */
 849                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
 850                 } else {
 851                         opregion->swsci_sbcb_sub_functions |= tmp;
 852                 }
 853         }
 854
 855         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
 856                          opregion->swsci_gbda_sub_functions,
 857                          opregion->swsci_sbcb_sub_functions);
 858 }
 859 #else /* CONFIG_ACPI */
 860 static inline void swsci_setup(struct drm_device *dev) {}
 861 #endif  /* CONFIG_ACPI */
 862
 863 int intel_opregion_setup(struct drm_device *dev)
 864 {
 865         struct drm_i915_private *dev_priv = dev->dev_private;
 866         struct intel_opregion *opregion = &dev_priv->opregion;
 867         char __iomem *base;
 868         u32 asls, mboxes;
 869         char buf[sizeof(OPREGION_SIGNATURE)];
 870         int err = 0;
 871
 872         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 873         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 874         if (asls == 0) {
 875                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 876                 return -ENOTSUP;
 877         }
 878
 879 #ifdef CONFIG_ACPI
 880         INIT_WORK(&opregion->asle_work, asle_work);
 881 #endif
 882
 883         base = (void *)pmap_mapbios(asls, OPREGION_SIZE);
 884         if (!base)
 885                 return -ENOMEM;
 886
 887         memcpy_fromio(buf, base, sizeof(buf));
 888
 889         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 890                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 891                 err = -EINVAL;
 892                 goto err_out;
 893         }
 894         opregion->header = (struct opregion_header *)base;
 895         opregion->vbt = base + OPREGION_VBT_OFFSET;
 896
 897         opregion->lid_state = (u32 *)(base + ACPI_CLID);
 898
 899         mboxes = ioread32(&opregion->header->mboxes);
 900         if (mboxes & MBOX_ACPI) {
 901                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 902                 opregion->acpi = (struct opregion_acpi *)(base + OPREGION_ACPI_OFFSET);
 903         }
 904
 905         if (mboxes & MBOX_SWSCI) {
 906                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 907                 opregion->swsci = (struct opregion_swsci *)(base + OPREGION_SWSCI_OFFSET);
 908                 swsci_setup(dev);
 909         }
 910         if (mboxes & MBOX_ASLE) {
 911                 DRM_DEBUG_DRIVER("ASLE supported\n");
 912                 opregion->asle = (struct opregion_asle *)(base + OPREGION_ASLE_OFFSET);
 913
 914                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 915         }
 916
 917         return 0;
 918
 919 err_out:
 920         pmap_unmapdev((vm_offset_t)base, OPREGION_SIZE);
 921         return err;
 922 }