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 } __attribute__((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 } __attribute__((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 } __attribute__((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 } __attribute__((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 #ifdef CONFIG_ACPI
 230 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
 231 {
 232         struct drm_i915_private *dev_priv = dev->dev_private;
 233         struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
 234         u32 main_function, sub_function, scic;
 235         u16 pci_swsci;
 236         u32 dslp;
 237
 238         if (!swsci)
 239                 return -ENODEV;
 240
 241         main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
 242                 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
 243         sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
 244                 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
 245
 246         /* Check if we can call the function. See swsci_setup for details. */
 247         if (main_function == SWSCI_SBCB) {
 248                 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
 249                      (1 << sub_function)) == 0)
 250                         return -EINVAL;
 251         } else if (main_function == SWSCI_GBDA) {
 252                 if ((dev_priv->opregion.swsci_gbda_sub_functions &
 253                      (1 << sub_function)) == 0)
 254                         return -EINVAL;
 255         }
 256
 257         /* Driver sleep timeout in ms. */
 258         dslp = ioread32(&swsci->dslp);
 259         if (!dslp) {
 260                 /* The spec says 2ms should be the default, but it's too small
 261                  * for some machines. */
 262                 dslp = 50;
 263         } else if (dslp > 500) {
 264                 /* Hey bios, trust must be earned. */
 265                 WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp);
 266                 dslp = 500;
 267         }
 268
 269         /* The spec tells us to do this, but we are the only user... */
 270         scic = ioread32(&swsci->scic);
 271         if (scic & SWSCI_SCIC_INDICATOR) {
 272                 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
 273                 return -EBUSY;
 274         }
 275
 276         scic = function | SWSCI_SCIC_INDICATOR;
 277
 278         iowrite32(parm, &swsci->parm);
 279         iowrite32(scic, &swsci->scic);
 280
 281         /* Ensure SCI event is selected and event trigger is cleared. */
 282         pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
 283         if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
 284                 pci_swsci |= PCI_SWSCI_SCISEL;
 285                 pci_swsci &= ~PCI_SWSCI_GSSCIE;
 286                 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
 287         }
 288
 289         /* Use event trigger to tell bios to check the mail. */
 290         pci_swsci |= PCI_SWSCI_GSSCIE;
 291         pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
 292
 293         /* Poll for the result. */
 294 #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
 295         if (wait_for(C, dslp)) {
 296                 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
 297                 return -ETIMEDOUT;
 298         }
 299
 300         scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
 301                 SWSCI_SCIC_EXIT_STATUS_SHIFT;
 302
 303         /* Note: scic == 0 is an error! */
 304         if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
 305                 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
 306                 return -EIO;
 307         }
 308
 309         if (parm_out)
 310                 *parm_out = ioread32(&swsci->parm);
 311
 312         return 0;
 313
 314 #undef C
 315 }
 316
 317 #define DISPLAY_TYPE_CRT                        0
 318 #define DISPLAY_TYPE_TV                         1
 319 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL        2
 320 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL        3
 321
 322 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 323                                   bool enable)
 324 {
 325         struct drm_device *dev = intel_encoder->base.dev;
 326         u32 parm = 0;
 327         u32 type = 0;
 328         u32 port;
 329
 330         /* don't care about old stuff for now */
 331         if (!HAS_DDI(dev))
 332                 return 0;
 333
 334         port = intel_ddi_get_encoder_port(intel_encoder);
 335         if (port == PORT_E) {
 336                 port = 0;
 337         } else {
 338                 parm |= 1 << port;
 339                 port++;
 340         }
 341
 342         if (!enable)
 343                 parm |= 4 << 8;
 344
 345         switch (intel_encoder->type) {
 346         case INTEL_OUTPUT_ANALOG:
 347                 type = DISPLAY_TYPE_CRT;
 348                 break;
 349         case INTEL_OUTPUT_UNKNOWN:
 350         case INTEL_OUTPUT_DISPLAYPORT:
 351         case INTEL_OUTPUT_HDMI:
 352                 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
 353                 break;
 354         case INTEL_OUTPUT_EDP:
 355                 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
 356                 break;
 357         default:
 358                 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
 359                           intel_encoder->type);
 360                 return -EINVAL;
 361         }
 362
 363         parm |= type << (16 + port * 3);
 364
 365         return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
 366 }
 367
 368 static const struct {
 369         pci_power_t pci_power_state;
 370         u32 parm;
 371 } power_state_map[] = {
 372         { PCI_D0,       0x00 },
 373         { PCI_D1,       0x01 },
 374         { PCI_D2,       0x02 },
 375         { PCI_D3hot,    0x04 },
 376         { PCI_D3cold,   0x04 },
 377 };
 378
 379 int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
 380 {
 381         int i;
 382
 383         if (!HAS_DDI(dev))
 384                 return 0;
 385
 386         for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
 387                 if (state == power_state_map[i].pci_power_state)
 388                         return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
 389                                      power_state_map[i].parm, NULL);
 390         }
 391
 392         return -EINVAL;
 393 }
 394
 395 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 396 {
 397         struct drm_i915_private *dev_priv = dev->dev_private;
 398         struct drm_encoder *encoder;
 399         struct drm_connector *connector;
 400         struct intel_connector *intel_connector = NULL;
 401         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[0];
 402         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 403         u32 ret = 0;
 404         bool found = false;
 405
 406         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
 407
 408         if (!(bclp & ASLE_BCLP_VALID))
 409                 return ASLC_BACKLIGHT_FAILED;
 410
 411         bclp &= ASLE_BCLP_MSK;
 412         if (bclp > 255)
 413                 return ASLC_BACKLIGHT_FAILED;
 414
 415         mutex_lock(&dev->mode_config.mutex);
 416         /*
 417          * Could match the OpRegion connector here instead, but we'd also need
 418          * to verify the connector could handle a backlight call.
 419          */
 420         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 421                 if (encoder->crtc == crtc) {
 422                         found = true;
 423                         break;
 424                 }
 425
 426         if (!found) {
 427                 ret = ASLC_BACKLIGHT_FAILED;
 428                 goto out;
 429         }
 430
 431         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 432                 if (connector->encoder == encoder)
 433                         intel_connector = to_intel_connector(connector);
 434
 435         if (!intel_connector) {
 436                 ret = ASLC_BACKLIGHT_FAILED;
 437                 goto out;
 438         }
 439
 440         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
 441         intel_panel_set_backlight(intel_connector, bclp, 255);
 442         iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
 443
 444 out:
 445         mutex_unlock(&dev->mode_config.mutex);
 446
 447         return ret;
 448 }
 449
 450 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
 451 {
 452         /* alsi is the current ALS reading in lux. 0 indicates below sensor
 453            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 454         DRM_DEBUG_DRIVER("Illum is not supported\n");
 455         return ASLC_ALS_ILLUM_FAILED;
 456 }
 457
 458 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
 459 {
 460         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 461         return ASLC_PWM_FREQ_FAILED;
 462 }
 463
 464 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
 465 {
 466         /* Panel fitting is currently controlled by the X code, so this is a
 467            noop until modesetting support works fully */
 468         DRM_DEBUG_DRIVER("Pfit is not supported\n");
 469         return ASLC_PFIT_FAILED;
 470 }
 471
 472 static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
 473 {
 474         DRM_DEBUG_DRIVER("SROT is not supported\n");
 475         return ASLC_ROTATION_ANGLES_FAILED;
 476 }
 477
 478 static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
 479 {
 480         if (!iuer)
 481                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
 482         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
 483                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
 484         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
 485                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
 486         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
 487                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
 488         if (iuer & ASLE_IUER_WINDOWS_BTN)
 489                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
 490         if (iuer & ASLE_IUER_POWER_BTN)
 491                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
 492
 493         return ASLC_BUTTON_ARRAY_FAILED;
 494 }
 495
 496 static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
 497 {
 498         if (iuer & ASLE_IUER_CONVERTIBLE)
 499                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
 500         else
 501                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
 502
 503         return ASLC_CONVERTIBLE_FAILED;
 504 }
 505
 506 static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
 507 {
 508         if (iuer & ASLE_IUER_DOCKING)
 509                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
 510         else
 511                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
 512
 513         return ASLC_DOCKING_FAILED;
 514 }
 515
 516 static u32 asle_isct_state(struct drm_device *dev)
 517 {
 518         DRM_DEBUG_DRIVER("ISCT is not supported\n");
 519         return ASLC_ISCT_STATE_FAILED;
 520 }
 521
 522 static void asle_work(struct work_struct *work)
 523 {
 524         struct intel_opregion *opregion =
 525                 container_of(work, struct intel_opregion, asle_work);
 526         struct drm_i915_private *dev_priv =
 527                 container_of(opregion, struct drm_i915_private, opregion);
 528         struct drm_device *dev = dev_priv->dev;
 529         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
 530         u32 aslc_stat = 0;
 531         u32 aslc_req;
 532
 533         if (!asle)
 534                 return;
 535
 536         aslc_req = ioread32(&asle->aslc);
 537
 538         if (!(aslc_req & ASLC_REQ_MSK)) {
 539                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
 540                                  aslc_req);
 541                 return;
 542         }
 543
 544         if (aslc_req & ASLC_SET_ALS_ILLUM)
 545                 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
 546
 547         if (aslc_req & ASLC_SET_BACKLIGHT)
 548                 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
 549
 550         if (aslc_req & ASLC_SET_PFIT)
 551                 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
 552
 553         if (aslc_req & ASLC_SET_PWM_FREQ)
 554                 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
 555
 556         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
 557                 aslc_stat |= asle_set_supported_rotation_angles(dev,
 558                                                         ioread32(&asle->srot));
 559
 560         if (aslc_req & ASLC_BUTTON_ARRAY)
 561                 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
 562
 563         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
 564                 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
 565
 566         if (aslc_req & ASLC_DOCKING_INDICATOR)
 567                 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
 568
 569         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
 570                 aslc_stat |= asle_isct_state(dev);
 571
 572         iowrite32(aslc_stat, &asle->aslc);
 573 }
 574
 575 void intel_opregion_asle_intr(struct drm_device *dev)
 576 {
 577         struct drm_i915_private *dev_priv = dev->dev_private;
 578
 579         if (dev_priv->opregion.asle)
 580                 schedule_work(&dev_priv->opregion.asle_work);
 581 }
 582
 583 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 584 #define ACPI_EV_LID            (1<<1)
 585 #define ACPI_EV_DOCK           (1<<2)
 586
 587 static struct intel_opregion *system_opregion;
 588
 589 static int intel_opregion_video_event(struct notifier_block *nb,
 590                                       unsigned long val, void *data)
 591 {
 592         /* The only video events relevant to opregion are 0x80. These indicate
 593            either a docking event, lid switch or display switch request. In
 594            Linux, these are handled by the dock, button and video drivers.
 595         */
 596
 597         struct opregion_acpi __iomem *acpi;
 598         struct acpi_bus_event *event = data;
 599         int ret = NOTIFY_OK;
 600
 601         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 602                 return NOTIFY_DONE;
 603
 604         if (!system_opregion)
 605                 return NOTIFY_DONE;
 606
 607         acpi = system_opregion->acpi;
 608
 609         if (event->type == 0x80 &&
 610             (ioread32(&acpi->cevt) & 1) == 0)
 611                 ret = NOTIFY_BAD;
 612
 613         iowrite32(0, &acpi->csts);
 614
 615         return ret;
 616 }
 617
 618 static struct notifier_block intel_opregion_notifier = {
 619         .notifier_call = intel_opregion_video_event,
 620 };
 621
 622 /*
 623  * Initialise the DIDL field in opregion. This passes a list of devices to
 624  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 625  * (version 3)
 626  */
 627
 628 static void intel_didl_outputs(struct drm_device *dev)
 629 {
 630         struct drm_i915_private *dev_priv = dev->dev_private;
 631         struct intel_opregion *opregion = &dev_priv->opregion;
 632         struct drm_connector *connector;
 633         acpi_handle handle;
 634         struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
 635         unsigned long long device_id;
 636         acpi_status status;
 637         u32 temp;
 638         int i = 0;
 639
 640         handle = ACPI_HANDLE(&dev->pdev->dev);
 641         if (!handle || acpi_bus_get_device(handle, &acpi_dev))
 642                 return;
 643
 644         if (acpi_is_video_device(handle))
 645                 acpi_video_bus = acpi_dev;
 646         else {
 647                 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
 648                         if (acpi_is_video_device(acpi_cdev->handle)) {
 649                                 acpi_video_bus = acpi_cdev;
 650                                 break;
 651                         }
 652                 }
 653         }
 654
 655         if (!acpi_video_bus) {
 656                 pr_warn("No ACPI video bus found\n");
 657                 return;
 658         }
 659
 660         list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
 661                 if (i >= 8) {
 662                         dev_dbg(&dev->pdev->dev,
 663                                 "More than 8 outputs detected via ACPI\n");
 664                         return;
 665                 }
 666                 status =
 667                         acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
 668                                                 NULL, &device_id);
 669                 if (ACPI_SUCCESS(status)) {
 670                         if (!device_id)
 671                                 goto blind_set;
 672                         iowrite32((u32)(device_id & 0x0f0f),
 673                                   &opregion->acpi->didl[i]);
 674                         i++;
 675                 }
 676         }
 677
 678 end:
 679         /* If fewer than 8 outputs, the list must be null terminated */
 680         if (i < 8)
 681                 iowrite32(0, &opregion->acpi->didl[i]);
 682         return;
 683
 684 blind_set:
 685         i = 0;
 686         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 687                 int output_type = ACPI_OTHER_OUTPUT;
 688                 if (i >= 8) {
 689                         dev_dbg(&dev->pdev->dev,
 690                                 "More than 8 outputs in connector list\n");
 691                         return;
 692                 }
 693                 switch (connector->connector_type) {
 694                 case DRM_MODE_CONNECTOR_VGA:
 695                 case DRM_MODE_CONNECTOR_DVIA:
 696                         output_type = ACPI_VGA_OUTPUT;
 697                         break;
 698                 case DRM_MODE_CONNECTOR_Composite:
 699                 case DRM_MODE_CONNECTOR_SVIDEO:
 700                 case DRM_MODE_CONNECTOR_Component:
 701                 case DRM_MODE_CONNECTOR_9PinDIN:
 702                         output_type = ACPI_TV_OUTPUT;
 703                         break;
 704                 case DRM_MODE_CONNECTOR_DVII:
 705                 case DRM_MODE_CONNECTOR_DVID:
 706                 case DRM_MODE_CONNECTOR_DisplayPort:
 707                 case DRM_MODE_CONNECTOR_HDMIA:
 708                 case DRM_MODE_CONNECTOR_HDMIB:
 709                         output_type = ACPI_DIGITAL_OUTPUT;
 710                         break;
 711                 case DRM_MODE_CONNECTOR_LVDS:
 712                         output_type = ACPI_LVDS_OUTPUT;
 713                         break;
 714                 }
 715                 temp = ioread32(&opregion->acpi->didl[i]);
 716                 iowrite32(temp | (1<<31) | output_type | i,
 717                           &opregion->acpi->didl[i]);
 718                 i++;
 719         }
 720         goto end;
 721 }
 722
 723 static void intel_setup_cadls(struct drm_device *dev)
 724 {
 725         struct drm_i915_private *dev_priv = dev->dev_private;
 726         struct intel_opregion *opregion = &dev_priv->opregion;
 727         int i = 0;
 728         u32 disp_id;
 729
 730         /* Initialize the CADL field by duplicating the DIDL values.
 731          * Technically, this is not always correct as display outputs may exist,
 732          * but not active. This initialization is necessary for some Clevo
 733          * laptops that check this field before processing the brightness and
 734          * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
 735          * there are less than eight devices. */
 736         do {
 737                 disp_id = ioread32(&opregion->acpi->didl[i]);
 738                 iowrite32(disp_id, &opregion->acpi->cadl[i]);
 739         } while (++i < 8 && disp_id != 0);
 740 }
 741
 742 void intel_opregion_init(struct drm_device *dev)
 743 {
 744         struct drm_i915_private *dev_priv = dev->dev_private;
 745         struct intel_opregion *opregion = &dev_priv->opregion;
 746
 747         if (!opregion->header)
 748                 return;
 749
 750         if (opregion->acpi) {
 751                 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 752                         intel_didl_outputs(dev);
 753                         intel_setup_cadls(dev);
 754                 }
 755
 756                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
 757                  * Right now, all the events are handled by the ACPI video module.
 758                  * We don't actually need to do anything with them. */
 759                 iowrite32(0, &opregion->acpi->csts);
 760                 iowrite32(1, &opregion->acpi->drdy);
 761
 762                 system_opregion = opregion;
 763                 register_acpi_notifier(&intel_opregion_notifier);
 764         }
 765
 766         if (opregion->asle) {
 767                 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
 768                 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
 769         }
 770 }
 771
 772 void intel_opregion_fini(struct drm_device *dev)
 773 {
 774         struct drm_i915_private *dev_priv = dev->dev_private;
 775         struct intel_opregion *opregion = &dev_priv->opregion;
 776
 777         if (!opregion->header)
 778                 return;
 779
 780         if (opregion->asle)
 781                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 782
 783         cancel_work_sync(&dev_priv->opregion.asle_work);
 784
 785         if (opregion->acpi) {
 786                 iowrite32(0, &opregion->acpi->drdy);
 787
 788                 system_opregion = NULL;
 789                 unregister_acpi_notifier(&intel_opregion_notifier);
 790         }
 791
 792         /* just clear all opregion memory pointers now */
 793         iounmap(opregion->header);
 794         opregion->header = NULL;
 795         opregion->acpi = NULL;
 796         opregion->swsci = NULL;
 797         opregion->asle = NULL;
 798         opregion->vbt = NULL;
 799         opregion->lid_state = NULL;
 800 }
 801
 802 static void swsci_setup(struct drm_device *dev)
 803 {
 804         struct drm_i915_private *dev_priv = dev->dev_private;
 805         struct intel_opregion *opregion = &dev_priv->opregion;
 806         bool requested_callbacks = false;
 807         u32 tmp;
 808
 809         /* Sub-function code 0 is okay, let's allow them. */
 810         opregion->swsci_gbda_sub_functions = 1;
 811         opregion->swsci_sbcb_sub_functions = 1;
 812
 813         /* We use GBDA to ask for supported GBDA calls. */
 814         if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
 815                 /* make the bits match the sub-function codes */
 816                 tmp <<= 1;
 817                 opregion->swsci_gbda_sub_functions |= tmp;
 818         }
 819
 820         /*
 821          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
 822          * must not call interfaces that are not specifically requested by the
 823          * bios.
 824          */
 825         if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
 826                 /* here, the bits already match sub-function codes */
 827                 opregion->swsci_sbcb_sub_functions |= tmp;
 828                 requested_callbacks = true;
 829         }
 830
 831         /*
 832          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
 833          * the callback is _requested_. But we still can't call interfaces that
 834          * are not requested.
 835          */
 836         if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
 837                 /* make the bits match the sub-function codes */
 838                 u32 low = tmp & 0x7ff;
 839                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
 840                 tmp = (high << 4) | (low << 1) | 1;
 841
 842                 /* best guess what to do with supported wrt requested */
 843                 if (requested_callbacks) {
 844                         u32 req = opregion->swsci_sbcb_sub_functions;
 845                         if ((req & tmp) != req)
 846                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
 847                         /* XXX: for now, trust the requested callbacks */
 848                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
 849                 } else {
 850                         opregion->swsci_sbcb_sub_functions |= tmp;
 851                 }
 852         }
 853
 854         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
 855                          opregion->swsci_gbda_sub_functions,
 856                          opregion->swsci_sbcb_sub_functions);
 857 }
 858 #else /* CONFIG_ACPI */
 859 static inline void swsci_setup(struct drm_device *dev) {}
 860 #endif  /* CONFIG_ACPI */
 861
 862 int intel_opregion_setup(struct drm_device *dev)
 863 {
 864         struct drm_i915_private *dev_priv = dev->dev_private;
 865         struct intel_opregion *opregion = &dev_priv->opregion;
 866         void __iomem *base;
 867         u32 asls, mboxes;
 868         char buf[sizeof(OPREGION_SIGNATURE)];
 869         int err = 0;
 870
 871         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
 872         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 873         if (asls == 0) {
 874                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 875                 return -ENOTSUPP;
 876         }
 877
 878 #ifdef CONFIG_ACPI
 879         INIT_WORK(&opregion->asle_work, asle_work);
 880 #endif
 881
 882         base = acpi_os_ioremap(asls, OPREGION_SIZE);
 883         if (!base)
 884                 return -ENOMEM;
 885
 886         memcpy_fromio(buf, base, sizeof(buf));
 887
 888         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 889                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 890                 err = -EINVAL;
 891                 goto err_out;
 892         }
 893         opregion->header = base;
 894         opregion->vbt = base + OPREGION_VBT_OFFSET;
 895
 896         opregion->lid_state = base + ACPI_CLID;
 897
 898         mboxes = ioread32(&opregion->header->mboxes);
 899         if (mboxes & MBOX_ACPI) {
 900                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 901                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
 902         }
 903
 904         if (mboxes & MBOX_SWSCI) {
 905                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 906                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
 907                 swsci_setup(dev);
 908         }
 909         if (mboxes & MBOX_ASLE) {
 910                 DRM_DEBUG_DRIVER("ASLE supported\n");
 911                 opregion->asle = base + OPREGION_ASLE_OFFSET;
 912
 913                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
 914         }
 915
 916         return 0;
 917
 918 err_out:
 919         iounmap(base);
 920         return err;
 921 }