drivers/gpu/drm/i915/display/intel

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
swsci
intel_opregion_notify_encoder
intel_opregion_notify_adapter
asle_set_backlight
asle_set_als_illum
asle_set_pwm_freq
asle_set_pfit
asle_set_supported_rotation_angles
asle_set_button_array
asle_set_convertible
asle_set_docking
asle_isct_state
asle_work
intel_opregion_asle_intr
intel_opregion_video_event
set_did
acpi_display_type
intel_didl_outputs
intel_setup_cadls
swsci_setup
intel_no_opregion_vbt_callback
intel_load_vbt_firmware
intel_opregion_setup
intel_use_opregion_panel_type_callback
intel_opregion_get_panel_type
intel_opregion_register
intel_opregion_resume
intel_opregion_suspend
intel_opregion_unregister
   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 <linux/acpi.h>
  29 #include <linux/dmi.h>
  30 #include <linux/firmware.h>
  31 #include <acpi/video.h>
  32 
  33 #include <drm/i915_drm.h>
  34 
  35 #include "display/intel_panel.h"
  36 
  37 #include "i915_drv.h"
  38 #include "intel_display_types.h"
  39 #include "intel_opregion.h"
  40 
  41 #define OPREGION_HEADER_OFFSET 0
  42 #define OPREGION_ACPI_OFFSET   0x100
  43 #define   ACPI_CLID 0x01ac /* current lid state indicator */
  44 #define   ACPI_CDCK 0x01b0 /* current docking state indicator */
  45 #define OPREGION_SWSCI_OFFSET  0x200
  46 #define OPREGION_ASLE_OFFSET   0x300
  47 #define OPREGION_VBT_OFFSET    0x400
  48 #define OPREGION_ASLE_EXT_OFFSET        0x1C00
  49 
  50 #define OPREGION_SIGNATURE "IntelGraphicsMem"
  51 #define MBOX_ACPI      (1<<0)
  52 #define MBOX_SWSCI     (1<<1)
  53 #define MBOX_ASLE      (1<<2)
  54 #define MBOX_ASLE_EXT  (1<<4)
  55 
  56 struct opregion_header {
  57         u8 signature[16];
  58         u32 size;
  59         struct {
  60                 u8 rsvd;
  61                 u8 revision;
  62                 u8 minor;
  63                 u8 major;
  64         }  __packed over;
  65         u8 bios_ver[32];
  66         u8 vbios_ver[16];
  67         u8 driver_ver[16];
  68         u32 mboxes;
  69         u32 driver_model;
  70         u32 pcon;
  71         u8 dver[32];
  72         u8 rsvd[124];
  73 } __packed;
  74 
  75 /* OpRegion mailbox #1: public ACPI methods */
  76 struct opregion_acpi {
  77         u32 drdy;       /* driver readiness */
  78         u32 csts;       /* notification status */
  79         u32 cevt;       /* current event */
  80         u8 rsvd1[20];
  81         u32 didl[8];    /* supported display devices ID list */
  82         u32 cpdl[8];    /* currently presented display list */
  83         u32 cadl[8];    /* currently active display list */
  84         u32 nadl[8];    /* next active devices list */
  85         u32 aslp;       /* ASL sleep time-out */
  86         u32 tidx;       /* toggle table index */
  87         u32 chpd;       /* current hotplug enable indicator */
  88         u32 clid;       /* current lid state*/
  89         u32 cdck;       /* current docking state */
  90         u32 sxsw;       /* Sx state resume */
  91         u32 evts;       /* ASL supported events */
  92         u32 cnot;       /* current OS notification */
  93         u32 nrdy;       /* driver status */
  94         u32 did2[7];    /* extended supported display devices ID list */
  95         u32 cpd2[7];    /* extended attached display devices list */
  96         u8 rsvd2[4];
  97 } __packed;
  98 
  99 /* OpRegion mailbox #2: SWSCI */
 100 struct opregion_swsci {
 101         u32 scic;       /* SWSCI command|status|data */
 102         u32 parm;       /* command parameters */
 103         u32 dslp;       /* driver sleep time-out */
 104         u8 rsvd[244];
 105 } __packed;
 106 
 107 /* OpRegion mailbox #3: ASLE */
 108 struct opregion_asle {
 109         u32 ardy;       /* driver readiness */
 110         u32 aslc;       /* ASLE interrupt command */
 111         u32 tche;       /* technology enabled indicator */
 112         u32 alsi;       /* current ALS illuminance reading */
 113         u32 bclp;       /* backlight brightness to set */
 114         u32 pfit;       /* panel fitting state */
 115         u32 cblv;       /* current brightness level */
 116         u16 bclm[20];   /* backlight level duty cycle mapping table */
 117         u32 cpfm;       /* current panel fitting mode */
 118         u32 epfm;       /* enabled panel fitting modes */
 119         u8 plut[74];    /* panel LUT and identifier */
 120         u32 pfmb;       /* PWM freq and min brightness */
 121         u32 cddv;       /* color correction default values */
 122         u32 pcft;       /* power conservation features */
 123         u32 srot;       /* supported rotation angles */
 124         u32 iuer;       /* IUER events */
 125         u64 fdss;
 126         u32 fdsp;
 127         u32 stat;
 128         u64 rvda;       /* Physical (2.0) or relative from opregion (2.1+)
 129                          * address of raw VBT data. */
 130         u32 rvds;       /* Size of raw vbt data */
 131         u8 rsvd[58];
 132 } __packed;
 133 
 134 /* OpRegion mailbox #5: ASLE ext */
 135 struct opregion_asle_ext {
 136         u32 phed;       /* Panel Header */
 137         u8 bddc[256];   /* Panel EDID */
 138         u8 rsvd[764];
 139 } __packed;
 140 
 141 /* Driver readiness indicator */
 142 #define ASLE_ARDY_READY         (1 << 0)
 143 #define ASLE_ARDY_NOT_READY     (0 << 0)
 144 
 145 /* ASLE Interrupt Command (ASLC) bits */
 146 #define ASLC_SET_ALS_ILLUM              (1 << 0)
 147 #define ASLC_SET_BACKLIGHT              (1 << 1)
 148 #define ASLC_SET_PFIT                   (1 << 2)
 149 #define ASLC_SET_PWM_FREQ               (1 << 3)
 150 #define ASLC_SUPPORTED_ROTATION_ANGLES  (1 << 4)
 151 #define ASLC_BUTTON_ARRAY               (1 << 5)
 152 #define ASLC_CONVERTIBLE_INDICATOR      (1 << 6)
 153 #define ASLC_DOCKING_INDICATOR          (1 << 7)
 154 #define ASLC_ISCT_STATE_CHANGE          (1 << 8)
 155 #define ASLC_REQ_MSK                    0x1ff
 156 /* response bits */
 157 #define ASLC_ALS_ILLUM_FAILED           (1 << 10)
 158 #define ASLC_BACKLIGHT_FAILED           (1 << 12)
 159 #define ASLC_PFIT_FAILED                (1 << 14)
 160 #define ASLC_PWM_FREQ_FAILED            (1 << 16)
 161 #define ASLC_ROTATION_ANGLES_FAILED     (1 << 18)
 162 #define ASLC_BUTTON_ARRAY_FAILED        (1 << 20)
 163 #define ASLC_CONVERTIBLE_FAILED         (1 << 22)
 164 #define ASLC_DOCKING_FAILED             (1 << 24)
 165 #define ASLC_ISCT_STATE_FAILED          (1 << 26)
 166 
 167 /* Technology enabled indicator */
 168 #define ASLE_TCHE_ALS_EN        (1 << 0)
 169 #define ASLE_TCHE_BLC_EN        (1 << 1)
 170 #define ASLE_TCHE_PFIT_EN       (1 << 2)
 171 #define ASLE_TCHE_PFMB_EN       (1 << 3)
 172 
 173 /* ASLE backlight brightness to set */
 174 #define ASLE_BCLP_VALID                (1<<31)
 175 #define ASLE_BCLP_MSK          (~(1<<31))
 176 
 177 /* ASLE panel fitting request */
 178 #define ASLE_PFIT_VALID         (1<<31)
 179 #define ASLE_PFIT_CENTER (1<<0)
 180 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
 181 #define ASLE_PFIT_STRETCH_GFX (1<<2)
 182 
 183 /* PWM frequency and minimum brightness */
 184 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
 185 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
 186 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
 187 #define ASLE_PFMB_PWM_VALID (1<<31)
 188 
 189 #define ASLE_CBLV_VALID         (1<<31)
 190 
 191 /* IUER */
 192 #define ASLE_IUER_DOCKING               (1 << 7)
 193 #define ASLE_IUER_CONVERTIBLE           (1 << 6)
 194 #define ASLE_IUER_ROTATION_LOCK_BTN     (1 << 4)
 195 #define ASLE_IUER_VOLUME_DOWN_BTN       (1 << 3)
 196 #define ASLE_IUER_VOLUME_UP_BTN         (1 << 2)
 197 #define ASLE_IUER_WINDOWS_BTN           (1 << 1)
 198 #define ASLE_IUER_POWER_BTN             (1 << 0)
 199 
 200 /* Software System Control Interrupt (SWSCI) */
 201 #define SWSCI_SCIC_INDICATOR            (1 << 0)
 202 #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT  1
 203 #define SWSCI_SCIC_MAIN_FUNCTION_MASK   (0xf << 1)
 204 #define SWSCI_SCIC_SUB_FUNCTION_SHIFT   8
 205 #define SWSCI_SCIC_SUB_FUNCTION_MASK    (0xff << 8)
 206 #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
 207 #define SWSCI_SCIC_EXIT_PARAMETER_MASK  (0xff << 8)
 208 #define SWSCI_SCIC_EXIT_STATUS_SHIFT    5
 209 #define SWSCI_SCIC_EXIT_STATUS_MASK     (7 << 5)
 210 #define SWSCI_SCIC_EXIT_STATUS_SUCCESS  1
 211 
 212 #define SWSCI_FUNCTION_CODE(main, sub) \
 213         ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
 214          (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
 215 
 216 /* SWSCI: Get BIOS Data (GBDA) */
 217 #define SWSCI_GBDA                      4
 218 #define SWSCI_GBDA_SUPPORTED_CALLS      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
 219 #define SWSCI_GBDA_REQUESTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
 220 #define SWSCI_GBDA_BOOT_DISPLAY_PREF    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
 221 #define SWSCI_GBDA_PANEL_DETAILS        SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
 222 #define SWSCI_GBDA_TV_STANDARD          SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
 223 #define SWSCI_GBDA_INTERNAL_GRAPHICS    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
 224 #define SWSCI_GBDA_SPREAD_SPECTRUM      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
 225 
 226 /* SWSCI: System BIOS Callbacks (SBCB) */
 227 #define SWSCI_SBCB                      6
 228 #define SWSCI_SBCB_SUPPORTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
 229 #define SWSCI_SBCB_INIT_COMPLETION      SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
 230 #define SWSCI_SBCB_PRE_HIRES_SET_MODE   SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
 231 #define SWSCI_SBCB_POST_HIRES_SET_MODE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
 232 #define SWSCI_SBCB_DISPLAY_SWITCH       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
 233 #define SWSCI_SBCB_SET_TV_FORMAT        SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
 234 #define SWSCI_SBCB_ADAPTER_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
 235 #define SWSCI_SBCB_DISPLAY_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
 236 #define SWSCI_SBCB_SET_BOOT_DISPLAY     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
 237 #define SWSCI_SBCB_SET_PANEL_DETAILS    SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
 238 #define SWSCI_SBCB_SET_INTERNAL_GFX     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
 239 #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
 240 #define SWSCI_SBCB_SUSPEND_RESUME       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
 241 #define SWSCI_SBCB_SET_SPREAD_SPECTRUM  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
 242 #define SWSCI_SBCB_POST_VBE_PM          SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
 243 #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
 244 
 245 /*
 246  * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
 247  * Attached to the Display Adapter).
 248  */
 249 #define ACPI_DISPLAY_INDEX_SHIFT                0
 250 #define ACPI_DISPLAY_INDEX_MASK                 (0xf << 0)
 251 #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT      4
 252 #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK       (0xf << 4)
 253 #define ACPI_DISPLAY_TYPE_SHIFT                 8
 254 #define ACPI_DISPLAY_TYPE_MASK                  (0xf << 8)
 255 #define ACPI_DISPLAY_TYPE_OTHER                 (0 << 8)
 256 #define ACPI_DISPLAY_TYPE_VGA                   (1 << 8)
 257 #define ACPI_DISPLAY_TYPE_TV                    (2 << 8)
 258 #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL      (3 << 8)
 259 #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL      (4 << 8)
 260 #define ACPI_VENDOR_SPECIFIC_SHIFT              12
 261 #define ACPI_VENDOR_SPECIFIC_MASK               (0xf << 12)
 262 #define ACPI_BIOS_CAN_DETECT                    (1 << 16)
 263 #define ACPI_DEPENDS_ON_VGA                     (1 << 17)
 264 #define ACPI_PIPE_ID_SHIFT                      18
 265 #define ACPI_PIPE_ID_MASK                       (7 << 18)
 266 #define ACPI_DEVICE_ID_SCHEME                   (1 << 31)
 267 
 268 #define MAX_DSLP        1500
 269 
 270 static int swsci(struct drm_i915_private *dev_priv,
 271                  u32 function, u32 parm, u32 *parm_out)
 272 {
 273         struct opregion_swsci *swsci = dev_priv->opregion.swsci;
 274         struct pci_dev *pdev = dev_priv->drm.pdev;
 275         u32 main_function, sub_function, scic;
 276         u16 swsci_val;
 277         u32 dslp;
 278 
 279         if (!swsci)
 280                 return -ENODEV;
 281 
 282         main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
 283                 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
 284         sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
 285                 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
 286 
 287         /* Check if we can call the function. See swsci_setup for details. */
 288         if (main_function == SWSCI_SBCB) {
 289                 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
 290                      (1 << sub_function)) == 0)
 291                         return -EINVAL;
 292         } else if (main_function == SWSCI_GBDA) {
 293                 if ((dev_priv->opregion.swsci_gbda_sub_functions &
 294                      (1 << sub_function)) == 0)
 295                         return -EINVAL;
 296         }
 297 
 298         /* Driver sleep timeout in ms. */
 299         dslp = swsci->dslp;
 300         if (!dslp) {
 301                 /* The spec says 2ms should be the default, but it's too small
 302                  * for some machines. */
 303                 dslp = 50;
 304         } else if (dslp > MAX_DSLP) {
 305                 /* Hey bios, trust must be earned. */
 306                 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
 307                               "using %u ms instead\n", dslp, MAX_DSLP);
 308                 dslp = MAX_DSLP;
 309         }
 310 
 311         /* The spec tells us to do this, but we are the only user... */
 312         scic = swsci->scic;
 313         if (scic & SWSCI_SCIC_INDICATOR) {
 314                 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
 315                 return -EBUSY;
 316         }
 317 
 318         scic = function | SWSCI_SCIC_INDICATOR;
 319 
 320         swsci->parm = parm;
 321         swsci->scic = scic;
 322 
 323         /* Ensure SCI event is selected and event trigger is cleared. */
 324         pci_read_config_word(pdev, SWSCI, &swsci_val);
 325         if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
 326                 swsci_val |= SWSCI_SCISEL;
 327                 swsci_val &= ~SWSCI_GSSCIE;
 328                 pci_write_config_word(pdev, SWSCI, swsci_val);
 329         }
 330 
 331         /* Use event trigger to tell bios to check the mail. */
 332         swsci_val |= SWSCI_GSSCIE;
 333         pci_write_config_word(pdev, SWSCI, swsci_val);
 334 
 335         /* Poll for the result. */
 336 #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
 337         if (wait_for(C, dslp)) {
 338                 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
 339                 return -ETIMEDOUT;
 340         }
 341 
 342         scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
 343                 SWSCI_SCIC_EXIT_STATUS_SHIFT;
 344 
 345         /* Note: scic == 0 is an error! */
 346         if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
 347                 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
 348                 return -EIO;
 349         }
 350 
 351         if (parm_out)
 352                 *parm_out = swsci->parm;
 353 
 354         return 0;
 355 
 356 #undef C
 357 }
 358 
 359 #define DISPLAY_TYPE_CRT                        0
 360 #define DISPLAY_TYPE_TV                         1
 361 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL        2
 362 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL        3
 363 
 364 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
 365                                   bool enable)
 366 {
 367         struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
 368         u32 parm = 0;
 369         u32 type = 0;
 370         u32 port;
 371 
 372         /* don't care about old stuff for now */
 373         if (!HAS_DDI(dev_priv))
 374                 return 0;
 375 
 376         if (intel_encoder->type == INTEL_OUTPUT_DSI)
 377                 port = 0;
 378         else
 379                 port = intel_encoder->port;
 380 
 381         if (port == PORT_E)  {
 382                 port = 0;
 383         } else {
 384                 parm |= 1 << port;
 385                 port++;
 386         }
 387 
 388         if (!enable)
 389                 parm |= 4 << 8;
 390 
 391         switch (intel_encoder->type) {
 392         case INTEL_OUTPUT_ANALOG:
 393                 type = DISPLAY_TYPE_CRT;
 394                 break;
 395         case INTEL_OUTPUT_DDI:
 396         case INTEL_OUTPUT_DP:
 397         case INTEL_OUTPUT_HDMI:
 398         case INTEL_OUTPUT_DP_MST:
 399                 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
 400                 break;
 401         case INTEL_OUTPUT_EDP:
 402         case INTEL_OUTPUT_DSI:
 403                 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
 404                 break;
 405         default:
 406                 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
 407                           intel_encoder->type);
 408                 return -EINVAL;
 409         }
 410 
 411         parm |= type << (16 + port * 3);
 412 
 413         return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
 414 }
 415 
 416 static const struct {
 417         pci_power_t pci_power_state;
 418         u32 parm;
 419 } power_state_map[] = {
 420         { PCI_D0,       0x00 },
 421         { PCI_D1,       0x01 },
 422         { PCI_D2,       0x02 },
 423         { PCI_D3hot,    0x04 },
 424         { PCI_D3cold,   0x04 },
 425 };
 426 
 427 int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
 428                                   pci_power_t state)
 429 {
 430         int i;
 431 
 432         if (!HAS_DDI(dev_priv))
 433                 return 0;
 434 
 435         for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
 436                 if (state == power_state_map[i].pci_power_state)
 437                         return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
 438                                      power_state_map[i].parm, NULL);
 439         }
 440 
 441         return -EINVAL;
 442 }
 443 
 444 static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
 445 {
 446         struct intel_connector *connector;
 447         struct drm_connector_list_iter conn_iter;
 448         struct opregion_asle *asle = dev_priv->opregion.asle;
 449         struct drm_device *dev = &dev_priv->drm;
 450 
 451         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
 452 
 453         if (acpi_video_get_backlight_type() == acpi_backlight_native) {
 454                 DRM_DEBUG_KMS("opregion backlight request ignored\n");
 455                 return 0;
 456         }
 457 
 458         if (!(bclp & ASLE_BCLP_VALID))
 459                 return ASLC_BACKLIGHT_FAILED;
 460 
 461         bclp &= ASLE_BCLP_MSK;
 462         if (bclp > 255)
 463                 return ASLC_BACKLIGHT_FAILED;
 464 
 465         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
 466 
 467         /*
 468          * Update backlight on all connectors that support backlight (usually
 469          * only one).
 470          */
 471         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
 472         drm_connector_list_iter_begin(dev, &conn_iter);
 473         for_each_intel_connector_iter(connector, &conn_iter)
 474                 intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
 475         drm_connector_list_iter_end(&conn_iter);
 476         asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
 477 
 478         drm_modeset_unlock(&dev->mode_config.connection_mutex);
 479 
 480 
 481         return 0;
 482 }
 483 
 484 static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
 485 {
 486         /* alsi is the current ALS reading in lux. 0 indicates below sensor
 487            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
 488         DRM_DEBUG_DRIVER("Illum is not supported\n");
 489         return ASLC_ALS_ILLUM_FAILED;
 490 }
 491 
 492 static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
 493 {
 494         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
 495         return ASLC_PWM_FREQ_FAILED;
 496 }
 497 
 498 static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
 499 {
 500         /* Panel fitting is currently controlled by the X code, so this is a
 501            noop until modesetting support works fully */
 502         DRM_DEBUG_DRIVER("Pfit is not supported\n");
 503         return ASLC_PFIT_FAILED;
 504 }
 505 
 506 static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
 507 {
 508         DRM_DEBUG_DRIVER("SROT is not supported\n");
 509         return ASLC_ROTATION_ANGLES_FAILED;
 510 }
 511 
 512 static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
 513 {
 514         if (!iuer)
 515                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
 516         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
 517                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
 518         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
 519                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
 520         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
 521                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
 522         if (iuer & ASLE_IUER_WINDOWS_BTN)
 523                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
 524         if (iuer & ASLE_IUER_POWER_BTN)
 525                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
 526 
 527         return ASLC_BUTTON_ARRAY_FAILED;
 528 }
 529 
 530 static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
 531 {
 532         if (iuer & ASLE_IUER_CONVERTIBLE)
 533                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
 534         else
 535                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
 536 
 537         return ASLC_CONVERTIBLE_FAILED;
 538 }
 539 
 540 static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
 541 {
 542         if (iuer & ASLE_IUER_DOCKING)
 543                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
 544         else
 545                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
 546 
 547         return ASLC_DOCKING_FAILED;
 548 }
 549 
 550 static u32 asle_isct_state(struct drm_i915_private *dev_priv)
 551 {
 552         DRM_DEBUG_DRIVER("ISCT is not supported\n");
 553         return ASLC_ISCT_STATE_FAILED;
 554 }
 555 
 556 static void asle_work(struct work_struct *work)
 557 {
 558         struct intel_opregion *opregion =
 559                 container_of(work, struct intel_opregion, asle_work);
 560         struct drm_i915_private *dev_priv =
 561                 container_of(opregion, struct drm_i915_private, opregion);
 562         struct opregion_asle *asle = dev_priv->opregion.asle;
 563         u32 aslc_stat = 0;
 564         u32 aslc_req;
 565 
 566         if (!asle)
 567                 return;
 568 
 569         aslc_req = asle->aslc;
 570 
 571         if (!(aslc_req & ASLC_REQ_MSK)) {
 572                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
 573                                  aslc_req);
 574                 return;
 575         }
 576 
 577         if (aslc_req & ASLC_SET_ALS_ILLUM)
 578                 aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
 579 
 580         if (aslc_req & ASLC_SET_BACKLIGHT)
 581                 aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
 582 
 583         if (aslc_req & ASLC_SET_PFIT)
 584                 aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
 585 
 586         if (aslc_req & ASLC_SET_PWM_FREQ)
 587                 aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
 588 
 589         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
 590                 aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
 591                                                         asle->srot);
 592 
 593         if (aslc_req & ASLC_BUTTON_ARRAY)
 594                 aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
 595 
 596         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
 597                 aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
 598 
 599         if (aslc_req & ASLC_DOCKING_INDICATOR)
 600                 aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
 601 
 602         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
 603                 aslc_stat |= asle_isct_state(dev_priv);
 604 
 605         asle->aslc = aslc_stat;
 606 }
 607 
 608 void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
 609 {
 610         if (dev_priv->opregion.asle)
 611                 schedule_work(&dev_priv->opregion.asle_work);
 612 }
 613 
 614 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
 615 #define ACPI_EV_LID            (1<<1)
 616 #define ACPI_EV_DOCK           (1<<2)
 617 
 618 /*
 619  * The only video events relevant to opregion are 0x80. These indicate either a
 620  * docking event, lid switch or display switch request. In Linux, these are
 621  * handled by the dock, button and video drivers.
 622  */
 623 static int intel_opregion_video_event(struct notifier_block *nb,
 624                                       unsigned long val, void *data)
 625 {
 626         struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
 627                                                        acpi_notifier);
 628         struct acpi_bus_event *event = data;
 629         struct opregion_acpi *acpi;
 630         int ret = NOTIFY_OK;
 631 
 632         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 633                 return NOTIFY_DONE;
 634 
 635         acpi = opregion->acpi;
 636 
 637         if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
 638                 ret = NOTIFY_BAD;
 639 
 640         acpi->csts = 0;
 641 
 642         return ret;
 643 }
 644 
 645 /*
 646  * Initialise the DIDL field in opregion. This passes a list of devices to
 647  * the firmware. Values are defined by section B.4.2 of the ACPI specification
 648  * (version 3)
 649  */
 650 
 651 static void set_did(struct intel_opregion *opregion, int i, u32 val)
 652 {
 653         if (i < ARRAY_SIZE(opregion->acpi->didl)) {
 654                 opregion->acpi->didl[i] = val;
 655         } else {
 656                 i -= ARRAY_SIZE(opregion->acpi->didl);
 657 
 658                 if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
 659                         return;
 660 
 661                 opregion->acpi->did2[i] = val;
 662         }
 663 }
 664 
 665 static u32 acpi_display_type(struct intel_connector *connector)
 666 {
 667         u32 display_type;
 668 
 669         switch (connector->base.connector_type) {
 670         case DRM_MODE_CONNECTOR_VGA:
 671         case DRM_MODE_CONNECTOR_DVIA:
 672                 display_type = ACPI_DISPLAY_TYPE_VGA;
 673                 break;
 674         case DRM_MODE_CONNECTOR_Composite:
 675         case DRM_MODE_CONNECTOR_SVIDEO:
 676         case DRM_MODE_CONNECTOR_Component:
 677         case DRM_MODE_CONNECTOR_9PinDIN:
 678         case DRM_MODE_CONNECTOR_TV:
 679                 display_type = ACPI_DISPLAY_TYPE_TV;
 680                 break;
 681         case DRM_MODE_CONNECTOR_DVII:
 682         case DRM_MODE_CONNECTOR_DVID:
 683         case DRM_MODE_CONNECTOR_DisplayPort:
 684         case DRM_MODE_CONNECTOR_HDMIA:
 685         case DRM_MODE_CONNECTOR_HDMIB:
 686                 display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
 687                 break;
 688         case DRM_MODE_CONNECTOR_LVDS:
 689         case DRM_MODE_CONNECTOR_eDP:
 690         case DRM_MODE_CONNECTOR_DSI:
 691                 display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
 692                 break;
 693         case DRM_MODE_CONNECTOR_Unknown:
 694         case DRM_MODE_CONNECTOR_VIRTUAL:
 695                 display_type = ACPI_DISPLAY_TYPE_OTHER;
 696                 break;
 697         default:
 698                 MISSING_CASE(connector->base.connector_type);
 699                 display_type = ACPI_DISPLAY_TYPE_OTHER;
 700                 break;
 701         }
 702 
 703         return display_type;
 704 }
 705 
 706 static void intel_didl_outputs(struct drm_i915_private *dev_priv)
 707 {
 708         struct intel_opregion *opregion = &dev_priv->opregion;
 709         struct intel_connector *connector;
 710         struct drm_connector_list_iter conn_iter;
 711         int i = 0, max_outputs;
 712         int display_index[16] = {};
 713 
 714         /*
 715          * In theory, did2, the extended didl, gets added at opregion version
 716          * 3.0. In practice, however, we're supposed to set it for earlier
 717          * versions as well, since a BIOS that doesn't understand did2 should
 718          * not look at it anyway. Use a variable so we can tweak this if a need
 719          * arises later.
 720          */
 721         max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
 722                 ARRAY_SIZE(opregion->acpi->did2);
 723 
 724         drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
 725         for_each_intel_connector_iter(connector, &conn_iter) {
 726                 u32 device_id, type;
 727 
 728                 device_id = acpi_display_type(connector);
 729 
 730                 /* Use display type specific display index. */
 731                 type = (device_id & ACPI_DISPLAY_TYPE_MASK)
 732                         >> ACPI_DISPLAY_TYPE_SHIFT;
 733                 device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
 734 
 735                 connector->acpi_device_id = device_id;
 736                 if (i < max_outputs)
 737                         set_did(opregion, i, device_id);
 738                 i++;
 739         }
 740         drm_connector_list_iter_end(&conn_iter);
 741 
 742         DRM_DEBUG_KMS("%d outputs detected\n", i);
 743 
 744         if (i > max_outputs)
 745                 DRM_ERROR("More than %d outputs in connector list\n",
 746                           max_outputs);
 747 
 748         /* If fewer than max outputs, the list must be null terminated */
 749         if (i < max_outputs)
 750                 set_did(opregion, i, 0);
 751 }
 752 
 753 static void intel_setup_cadls(struct drm_i915_private *dev_priv)
 754 {
 755         struct intel_opregion *opregion = &dev_priv->opregion;
 756         struct intel_connector *connector;
 757         struct drm_connector_list_iter conn_iter;
 758         int i = 0;
 759 
 760         /*
 761          * Initialize the CADL field from the connector device ids. This is
 762          * essentially the same as copying from the DIDL. Technically, this is
 763          * not always correct as display outputs may exist, but not active. This
 764          * initialization is necessary for some Clevo laptops that check this
 765          * field before processing the brightness and display switching hotkeys.
 766          *
 767          * Note that internal panels should be at the front of the connector
 768          * list already, ensuring they're not left out.
 769          */
 770         drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
 771         for_each_intel_connector_iter(connector, &conn_iter) {
 772                 if (i >= ARRAY_SIZE(opregion->acpi->cadl))
 773                         break;
 774                 opregion->acpi->cadl[i++] = connector->acpi_device_id;
 775         }
 776         drm_connector_list_iter_end(&conn_iter);
 777 
 778         /* If fewer than 8 active devices, the list must be null terminated */
 779         if (i < ARRAY_SIZE(opregion->acpi->cadl))
 780                 opregion->acpi->cadl[i] = 0;
 781 }
 782 
 783 static void swsci_setup(struct drm_i915_private *dev_priv)
 784 {
 785         struct intel_opregion *opregion = &dev_priv->opregion;
 786         bool requested_callbacks = false;
 787         u32 tmp;
 788 
 789         /* Sub-function code 0 is okay, let's allow them. */
 790         opregion->swsci_gbda_sub_functions = 1;
 791         opregion->swsci_sbcb_sub_functions = 1;
 792 
 793         /* We use GBDA to ask for supported GBDA calls. */
 794         if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
 795                 /* make the bits match the sub-function codes */
 796                 tmp <<= 1;
 797                 opregion->swsci_gbda_sub_functions |= tmp;
 798         }
 799 
 800         /*
 801          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
 802          * must not call interfaces that are not specifically requested by the
 803          * bios.
 804          */
 805         if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
 806                 /* here, the bits already match sub-function codes */
 807                 opregion->swsci_sbcb_sub_functions |= tmp;
 808                 requested_callbacks = true;
 809         }
 810 
 811         /*
 812          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
 813          * the callback is _requested_. But we still can't call interfaces that
 814          * are not requested.
 815          */
 816         if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
 817                 /* make the bits match the sub-function codes */
 818                 u32 low = tmp & 0x7ff;
 819                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
 820                 tmp = (high << 4) | (low << 1) | 1;
 821 
 822                 /* best guess what to do with supported wrt requested */
 823                 if (requested_callbacks) {
 824                         u32 req = opregion->swsci_sbcb_sub_functions;
 825                         if ((req & tmp) != req)
 826                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
 827                         /* XXX: for now, trust the requested callbacks */
 828                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
 829                 } else {
 830                         opregion->swsci_sbcb_sub_functions |= tmp;
 831                 }
 832         }
 833 
 834         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
 835                          opregion->swsci_gbda_sub_functions,
 836                          opregion->swsci_sbcb_sub_functions);
 837 }
 838 
 839 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
 840 {
 841         DRM_DEBUG_KMS("Falling back to manually reading VBT from "
 842                       "VBIOS ROM for %s\n", id->ident);
 843         return 1;
 844 }
 845 
 846 static const struct dmi_system_id intel_no_opregion_vbt[] = {
 847         {
 848                 .callback = intel_no_opregion_vbt_callback,
 849                 .ident = "ThinkCentre A57",
 850                 .matches = {
 851                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 852                         DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
 853                 },
 854         },
 855         { }
 856 };
 857 
 858 static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
 859 {
 860         struct intel_opregion *opregion = &dev_priv->opregion;
 861         const struct firmware *fw = NULL;
 862         const char *name = i915_modparams.vbt_firmware;
 863         int ret;
 864 
 865         if (!name || !*name)
 866                 return -ENOENT;
 867 
 868         ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
 869         if (ret) {
 870                 DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
 871                           name, ret);
 872                 return ret;
 873         }
 874 
 875         if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
 876                 opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
 877                 if (opregion->vbt_firmware) {
 878                         DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
 879                         opregion->vbt = opregion->vbt_firmware;
 880                         opregion->vbt_size = fw->size;
 881                         ret = 0;
 882                 } else {
 883                         ret = -ENOMEM;
 884                 }
 885         } else {
 886                 DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
 887                 ret = -EINVAL;
 888         }
 889 
 890         release_firmware(fw);
 891 
 892         return ret;
 893 }
 894 
 895 int intel_opregion_setup(struct drm_i915_private *dev_priv)
 896 {
 897         struct intel_opregion *opregion = &dev_priv->opregion;
 898         struct pci_dev *pdev = dev_priv->drm.pdev;
 899         u32 asls, mboxes;
 900         char buf[sizeof(OPREGION_SIGNATURE)];
 901         int err = 0;
 902         void *base;
 903         const void *vbt;
 904         u32 vbt_size;
 905 
 906         BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
 907         BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
 908         BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
 909         BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
 910         BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
 911 
 912         pci_read_config_dword(pdev, ASLS, &asls);
 913         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
 914         if (asls == 0) {
 915                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
 916                 return -ENOTSUPP;
 917         }
 918 
 919         INIT_WORK(&opregion->asle_work, asle_work);
 920 
 921         base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
 922         if (!base)
 923                 return -ENOMEM;
 924 
 925         memcpy(buf, base, sizeof(buf));
 926 
 927         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
 928                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
 929                 err = -EINVAL;
 930                 goto err_out;
 931         }
 932         opregion->header = base;
 933         opregion->lid_state = base + ACPI_CLID;
 934 
 935         DRM_DEBUG_DRIVER("ACPI OpRegion version %u.%u.%u\n",
 936                          opregion->header->over.major,
 937                          opregion->header->over.minor,
 938                          opregion->header->over.revision);
 939 
 940         mboxes = opregion->header->mboxes;
 941         if (mboxes & MBOX_ACPI) {
 942                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
 943                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
 944         }
 945 
 946         if (mboxes & MBOX_SWSCI) {
 947                 DRM_DEBUG_DRIVER("SWSCI supported\n");
 948                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
 949                 swsci_setup(dev_priv);
 950         }
 951 
 952         if (mboxes & MBOX_ASLE) {
 953                 DRM_DEBUG_DRIVER("ASLE supported\n");
 954                 opregion->asle = base + OPREGION_ASLE_OFFSET;
 955 
 956                 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
 957         }
 958 
 959         if (mboxes & MBOX_ASLE_EXT)
 960                 DRM_DEBUG_DRIVER("ASLE extension supported\n");
 961 
 962         if (intel_load_vbt_firmware(dev_priv) == 0)
 963                 goto out;
 964 
 965         if (dmi_check_system(intel_no_opregion_vbt))
 966                 goto out;
 967 
 968         if (opregion->header->over.major >= 2 && opregion->asle &&
 969             opregion->asle->rvda && opregion->asle->rvds) {
 970                 resource_size_t rvda = opregion->asle->rvda;
 971 
 972                 /*
 973                  * opregion 2.0: rvda is the physical VBT address.
 974                  *
 975                  * opregion 2.1+: rvda is unsigned, relative offset from
 976                  * opregion base, and should never point within opregion.
 977                  */
 978                 if (opregion->header->over.major > 2 ||
 979                     opregion->header->over.minor >= 1) {
 980                         WARN_ON(rvda < OPREGION_SIZE);
 981 
 982                         rvda += asls;
 983                 }
 984 
 985                 opregion->rvda = memremap(rvda, opregion->asle->rvds,
 986                                           MEMREMAP_WB);
 987 
 988                 vbt = opregion->rvda;
 989                 vbt_size = opregion->asle->rvds;
 990                 if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
 991                         DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
 992                         opregion->vbt = vbt;
 993                         opregion->vbt_size = vbt_size;
 994                         goto out;
 995                 } else {
 996                         DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
 997                         memunmap(opregion->rvda);
 998                         opregion->rvda = NULL;
 999                 }
1000         }
1001 
1002         vbt = base + OPREGION_VBT_OFFSET;
1003         /*
1004          * The VBT specification says that if the ASLE ext mailbox is not used
1005          * its area is reserved, but on some CHT boards the VBT extends into the
1006          * ASLE ext area. Allow this even though it is against the spec, so we
1007          * do not end up rejecting the VBT on those boards (and end up not
1008          * finding the LCD panel because of this).
1009          */
1010         vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1011                 OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1012         vbt_size -= OPREGION_VBT_OFFSET;
1013         if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1014                 DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1015                 opregion->vbt = vbt;
1016                 opregion->vbt_size = vbt_size;
1017         } else {
1018                 DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1019         }
1020 
1021 out:
1022         return 0;
1023 
1024 err_out:
1025         memunmap(base);
1026         return err;
1027 }
1028 
1029 static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1030 {
1031         DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1032         return 1;
1033 }
1034 
1035 static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1036         {
1037                 .callback = intel_use_opregion_panel_type_callback,
1038                 .ident = "Conrac GmbH IX45GM2",
1039                 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1040                             DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1041                 },
1042         },
1043         { }
1044 };
1045 
1046 int
1047 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1048 {
1049         u32 panel_details;
1050         int ret;
1051 
1052         ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1053         if (ret) {
1054                 DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1055                               ret);
1056                 return ret;
1057         }
1058 
1059         ret = (panel_details >> 8) & 0xff;
1060         if (ret > 0x10) {
1061                 DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1062                 return -EINVAL;
1063         }
1064 
1065         /* fall back to VBT panel type? */
1066         if (ret == 0x0) {
1067                 DRM_DEBUG_KMS("No panel type in OpRegion\n");
1068                 return -ENODEV;
1069         }
1070 
1071         /*
1072          * So far we know that some machined must use it, others must not use it.
1073          * There doesn't seem to be any way to determine which way to go, except
1074          * via a quirk list :(
1075          */
1076         if (!dmi_check_system(intel_use_opregion_panel_type)) {
1077                 DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1078                 return -ENODEV;
1079         }
1080 
1081         return ret - 1;
1082 }
1083 
1084 void intel_opregion_register(struct drm_i915_private *i915)
1085 {
1086         struct intel_opregion *opregion = &i915->opregion;
1087 
1088         if (!opregion->header)
1089                 return;
1090 
1091         if (opregion->acpi) {
1092                 opregion->acpi_notifier.notifier_call =
1093                         intel_opregion_video_event;
1094                 register_acpi_notifier(&opregion->acpi_notifier);
1095         }
1096 
1097         intel_opregion_resume(i915);
1098 }
1099 
1100 void intel_opregion_resume(struct drm_i915_private *i915)
1101 {
1102         struct intel_opregion *opregion = &i915->opregion;
1103 
1104         if (!opregion->header)
1105                 return;
1106 
1107         if (opregion->acpi) {
1108                 intel_didl_outputs(i915);
1109                 intel_setup_cadls(i915);
1110 
1111                 /*
1112                  * Notify BIOS we are ready to handle ACPI video ext notifs.
1113                  * Right now, all the events are handled by the ACPI video
1114                  * module. We don't actually need to do anything with them.
1115                  */
1116                 opregion->acpi->csts = 0;
1117                 opregion->acpi->drdy = 1;
1118         }
1119 
1120         if (opregion->asle) {
1121                 opregion->asle->tche = ASLE_TCHE_BLC_EN;
1122                 opregion->asle->ardy = ASLE_ARDY_READY;
1123         }
1124 
1125         intel_opregion_notify_adapter(i915, PCI_D0);
1126 }
1127 
1128 void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1129 {
1130         struct intel_opregion *opregion = &i915->opregion;
1131 
1132         if (!opregion->header)
1133                 return;
1134 
1135         intel_opregion_notify_adapter(i915, state);
1136 
1137         if (opregion->asle)
1138                 opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1139 
1140         cancel_work_sync(&i915->opregion.asle_work);
1141 
1142         if (opregion->acpi)
1143                 opregion->acpi->drdy = 0;
1144 }
1145 
1146 void intel_opregion_unregister(struct drm_i915_private *i915)
1147 {
1148         struct intel_opregion *opregion = &i915->opregion;
1149 
1150         intel_opregion_suspend(i915, PCI_D1);
1151 
1152         if (!opregion->header)
1153                 return;
1154 
1155         if (opregion->acpi_notifier.notifier_call) {
1156                 unregister_acpi_notifier(&opregion->acpi_notifier);
1157                 opregion->acpi_notifier.notifier_call = NULL;
1158         }
1159 
1160         /* just clear all opregion memory pointers now */
1161         memunmap(opregion->header);
1162         if (opregion->rvda) {
1163                 memunmap(opregion->rvda);
1164                 opregion->rvda = NULL;
1165         }
1166         if (opregion->vbt_firmware) {
1167                 kfree(opregion->vbt_firmware);
1168                 opregion->vbt_firmware = NULL;
1169         }
1170         opregion->header = NULL;
1171         opregion->acpi = NULL;
1172         opregion->swsci = NULL;
1173         opregion->asle = NULL;
1174         opregion->vbt = NULL;
1175         opregion->lid_state = NULL;
1176 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/i915/display/intel_opregion.c

DEFINITIONS
