drivers/gpu/drm/i915/intel_crt.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Eric Anholt <eric@anholt.net>
  25  */
  26
  27 #include <linux/dmi.h>
  28 #include <linux/i2c.h>
  29 #include <linux/slab.h>
  30 #include "drmP.h"
  31 #include "drm.h"
  32 #include "drm_crtc.h"
  33 #include "drm_crtc_helper.h"
  34 #include "drm_edid.h"
  35 #include "intel_drv.h"
  36 #include "i915_drm.h"
  37 #include "i915_drv.h"
  38
  39 /* Here's the desired hotplug mode */
  40 #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 |                \
  41                            ADPA_CRT_HOTPLUG_WARMUP_10MS |               \
  42                            ADPA_CRT_HOTPLUG_SAMPLE_4S |                 \
  43                            ADPA_CRT_HOTPLUG_VOLTAGE_50 |                \
  44                            ADPA_CRT_HOTPLUG_VOLREF_325MV |              \
  45                            ADPA_CRT_HOTPLUG_ENABLE)
  46
  47 struct intel_crt {
  48         struct intel_encoder base;
  49         bool force_hotplug_required;
  50 };
  51
  52 static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
  53 {
  54         return container_of(intel_attached_encoder(connector),
  55                             struct intel_crt, base);
  56 }
  57
  58 static void pch_crt_dpms(struct drm_encoder *encoder, int mode)
  59 {
  60         struct drm_device *dev = encoder->dev;
  61         struct drm_i915_private *dev_priv = dev->dev_private;
  62         u32 temp;
  63
  64         temp = I915_READ(PCH_ADPA);
  65         temp &= ~ADPA_DAC_ENABLE;
  66
  67         switch (mode) {
  68         case DRM_MODE_DPMS_ON:
  69                 temp |= ADPA_DAC_ENABLE;
  70                 break;
  71         case DRM_MODE_DPMS_STANDBY:
  72         case DRM_MODE_DPMS_SUSPEND:
  73         case DRM_MODE_DPMS_OFF:
  74                 /* Just leave port enable cleared */
  75                 break;
  76         }
  77
  78         I915_WRITE(PCH_ADPA, temp);
  79 }
  80
  81 static void gmch_crt_dpms(struct drm_encoder *encoder, int mode)
  82 {
  83         struct drm_device *dev = encoder->dev;
  84         struct drm_i915_private *dev_priv = dev->dev_private;
  85         u32 temp;
  86
  87         temp = I915_READ(ADPA);
  88         temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
  89         temp &= ~ADPA_DAC_ENABLE;
  90
  91         switch (mode) {
  92         case DRM_MODE_DPMS_ON:
  93                 temp |= ADPA_DAC_ENABLE;
  94                 break;
  95         case DRM_MODE_DPMS_STANDBY:
  96                 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
  97                 break;
  98         case DRM_MODE_DPMS_SUSPEND:
  99                 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
 100                 break;
 101         case DRM_MODE_DPMS_OFF:
 102                 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
 103                 break;
 104         }
 105
 106         I915_WRITE(ADPA, temp);
 107 }
 108
 109 static int intel_crt_mode_valid(struct drm_connector *connector,
 110                                 struct drm_display_mode *mode)
 111 {
 112         struct drm_device *dev = connector->dev;
 113
 114         int max_clock = 0;
 115         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 116                 return MODE_NO_DBLESCAN;
 117
 118         if (mode->clock < 25000)
 119                 return MODE_CLOCK_LOW;
 120
 121         if (IS_GEN2(dev))
 122                 max_clock = 350000;
 123         else
 124                 max_clock = 400000;
 125         if (mode->clock > max_clock)
 126                 return MODE_CLOCK_HIGH;
 127
 128         return MODE_OK;
 129 }
 130
 131 static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
 132                                  struct drm_display_mode *mode,
 133                                  struct drm_display_mode *adjusted_mode)
 134 {
 135         return true;
 136 }
 137
 138 static void intel_crt_mode_set(struct drm_encoder *encoder,
 139                                struct drm_display_mode *mode,
 140                                struct drm_display_mode *adjusted_mode)
 141 {
 142
 143         struct drm_device *dev = encoder->dev;
 144         struct drm_crtc *crtc = encoder->crtc;
 145         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 146         struct drm_i915_private *dev_priv = dev->dev_private;
 147         int dpll_md_reg;
 148         u32 adpa, dpll_md;
 149         u32 adpa_reg;
 150
 151         dpll_md_reg = DPLL_MD(intel_crtc->pipe);
 152
 153         if (HAS_PCH_SPLIT(dev))
 154                 adpa_reg = PCH_ADPA;
 155         else
 156                 adpa_reg = ADPA;
 157
 158         /*
 159          * Disable separate mode multiplier used when cloning SDVO to CRT
 160          * XXX this needs to be adjusted when we really are cloning
 161          */
 162         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 163                 dpll_md = I915_READ(dpll_md_reg);
 164                 I915_WRITE(dpll_md_reg,
 165                            dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
 166         }
 167
 168         adpa = ADPA_HOTPLUG_BITS;
 169         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 170                 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
 171         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 172                 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
 173
 174         /* For CPT allow 3 pipe config, for others just use A or B */
 175         if (HAS_PCH_CPT(dev))
 176                 adpa |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
 177         else if (intel_crtc->pipe == 0)
 178                 adpa |= ADPA_PIPE_A_SELECT;
 179         else
 180                 adpa |= ADPA_PIPE_B_SELECT;
 181
 182         if (!HAS_PCH_SPLIT(dev))
 183                 I915_WRITE(BCLRPAT(intel_crtc->pipe), 0);
 184
 185         I915_WRITE(adpa_reg, adpa);
 186 }
 187
 188 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
 189 {
 190         struct drm_device *dev = connector->dev;
 191         struct intel_crt *crt = intel_attached_crt(connector);
 192         struct drm_i915_private *dev_priv = dev->dev_private;
 193         u32 adpa;
 194         bool ret;
 195
 196         /* The first time through, trigger an explicit detection cycle */
 197         if (crt->force_hotplug_required) {
 198                 bool turn_off_dac = HAS_PCH_SPLIT(dev);
 199                 u32 save_adpa;
 200
 201                 crt->force_hotplug_required = 0;
 202
 203                 save_adpa = adpa = I915_READ(PCH_ADPA);
 204                 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
 205
 206                 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
 207                 if (turn_off_dac)
 208                         adpa &= ~ADPA_DAC_ENABLE;
 209
 210                 I915_WRITE(PCH_ADPA, adpa);
 211
 212                 if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
 213                              1000))
 214                         DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
 215
 216                 if (turn_off_dac) {
 217                         I915_WRITE(PCH_ADPA, save_adpa);
 218                         POSTING_READ(PCH_ADPA);
 219                 }
 220         }
 221
 222         /* Check the status to see if both blue and green are on now */
 223         adpa = I915_READ(PCH_ADPA);
 224         if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
 225                 ret = true;
 226         else
 227                 ret = false;
 228         DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);
 229
 230         return ret;
 231 }
 232
 233 static bool valleyview_crt_detect_hotplug(struct drm_connector *connector)
 234 {
 235         struct drm_device *dev = connector->dev;
 236         struct drm_i915_private *dev_priv = dev->dev_private;
 237         u32 adpa;
 238         bool ret;
 239         u32 save_adpa;
 240
 241         save_adpa = adpa = I915_READ(ADPA);
 242         DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
 243
 244         adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
 245
 246         I915_WRITE(ADPA, adpa);
 247
 248         if (wait_for((I915_READ(ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
 249                      1000)) {
 250                 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
 251                 I915_WRITE(ADPA, save_adpa);
 252         }
 253
 254         /* Check the status to see if both blue and green are on now */
 255         adpa = I915_READ(ADPA);
 256         if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
 257                 ret = true;
 258         else
 259                 ret = false;
 260
 261         DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret);
 262
 263         /* FIXME: debug force function and remove */
 264         ret = true;
 265
 266         return ret;
 267 }
 268
 269 /**
 270  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 271  *
 272  * Not for i915G/i915GM
 273  *
 274  * \return true if CRT is connected.
 275  * \return false if CRT is disconnected.
 276  */
 277 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
 278 {
 279         struct drm_device *dev = connector->dev;
 280         struct drm_i915_private *dev_priv = dev->dev_private;
 281         u32 hotplug_en, orig, stat;
 282         bool ret = false;
 283         int i, tries = 0;
 284
 285         if (HAS_PCH_SPLIT(dev))
 286                 return intel_ironlake_crt_detect_hotplug(connector);
 287
 288         if (IS_VALLEYVIEW(dev))
 289                 return valleyview_crt_detect_hotplug(connector);
 290
 291         /*
 292          * On 4 series desktop, CRT detect sequence need to be done twice
 293          * to get a reliable result.
 294          */
 295
 296         if (IS_G4X(dev) && !IS_GM45(dev))
 297                 tries = 2;
 298         else
 299                 tries = 1;
 300         hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN);
 301         hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
 302
 303         for (i = 0; i < tries ; i++) {
 304                 /* turn on the FORCE_DETECT */
 305                 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
 306                 /* wait for FORCE_DETECT to go off */
 307                 if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
 308                               CRT_HOTPLUG_FORCE_DETECT) == 0,
 309                              1000))
 310                         DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
 311         }
 312
 313         stat = I915_READ(PORT_HOTPLUG_STAT);
 314         if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
 315                 ret = true;
 316
 317         /* clear the interrupt we just generated, if any */
 318         I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
 319
 320         /* and put the bits back */
 321         I915_WRITE(PORT_HOTPLUG_EN, orig);
 322
 323         return ret;
 324 }
 325
 326 static bool intel_crt_detect_ddc(struct drm_connector *connector)
 327 {
 328         struct intel_crt *crt = intel_attached_crt(connector);
 329         struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private;
 330
 331         /* CRT should always be at 0, but check anyway */
 332         if (crt->base.type != INTEL_OUTPUT_ANALOG)
 333                 return false;
 334
 335         if (intel_ddc_probe(&crt->base, dev_priv->crt_ddc_pin)) {
 336                 struct edid *edid;
 337                 bool is_digital = false;
 338                 struct i2c_adapter *i2c;
 339
 340                 i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->crt_ddc_pin);
 341                 edid = drm_get_edid(connector, i2c);
 342                 /*
 343                  * This may be a DVI-I connector with a shared DDC
 344                  * link between analog and digital outputs, so we
 345                  * have to check the EDID input spec of the attached device.
 346                  *
 347                  * On the other hand, what should we do if it is a broken EDID?
 348                  */
 349                 if (edid != NULL) {
 350                         is_digital = edid->input & DRM_EDID_INPUT_DIGITAL;
 351                         connector->display_info.raw_edid = NULL;
 352                         kfree(edid);
 353                 }
 354
 355                 if (!is_digital) {
 356                         DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
 357                         return true;
 358                 } else {
 359                         DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
 360                 }
 361         }
 362
 363         return false;
 364 }
 365
 366 static enum drm_connector_status
 367 intel_crt_load_detect(struct intel_crt *crt)
 368 {
 369         struct drm_device *dev = crt->base.base.dev;
 370         struct drm_i915_private *dev_priv = dev->dev_private;
 371         uint32_t pipe = to_intel_crtc(crt->base.base.crtc)->pipe;
 372         uint32_t save_bclrpat;
 373         uint32_t save_vtotal;
 374         uint32_t vtotal, vactive;
 375         uint32_t vsample;
 376         uint32_t vblank, vblank_start, vblank_end;
 377         uint32_t dsl;
 378         uint32_t bclrpat_reg;
 379         uint32_t vtotal_reg;
 380         uint32_t vblank_reg;
 381         uint32_t vsync_reg;
 382         uint32_t pipeconf_reg;
 383         uint32_t pipe_dsl_reg;
 384         uint8_t st00;
 385         enum drm_connector_status status;
 386
 387         DRM_DEBUG_KMS("starting load-detect on CRT\n");
 388
 389         bclrpat_reg = BCLRPAT(pipe);
 390         vtotal_reg = VTOTAL(pipe);
 391         vblank_reg = VBLANK(pipe);
 392         vsync_reg = VSYNC(pipe);
 393         pipeconf_reg = PIPECONF(pipe);
 394         pipe_dsl_reg = PIPEDSL(pipe);
 395
 396         save_bclrpat = I915_READ(bclrpat_reg);
 397         save_vtotal = I915_READ(vtotal_reg);
 398         vblank = I915_READ(vblank_reg);
 399
 400         vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
 401         vactive = (save_vtotal & 0x7ff) + 1;
 402
 403         vblank_start = (vblank & 0xfff) + 1;
 404         vblank_end = ((vblank >> 16) & 0xfff) + 1;
 405
 406         /* Set the border color to purple. */
 407         I915_WRITE(bclrpat_reg, 0x500050);
 408
 409         if (!IS_GEN2(dev)) {
 410                 uint32_t pipeconf = I915_READ(pipeconf_reg);
 411                 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
 412                 POSTING_READ(pipeconf_reg);
 413                 /* Wait for next Vblank to substitue
 414                  * border color for Color info */
 415                 intel_wait_for_vblank(dev, pipe);
 416                 st00 = I915_READ8(VGA_MSR_WRITE);
 417                 status = ((st00 & (1 << 4)) != 0) ?
 418                         connector_status_connected :
 419                         connector_status_disconnected;
 420
 421                 I915_WRITE(pipeconf_reg, pipeconf);
 422         } else {
 423                 bool restore_vblank = false;
 424                 int count, detect;
 425
 426                 /*
 427                 * If there isn't any border, add some.
 428                 * Yes, this will flicker
 429                 */
 430                 if (vblank_start <= vactive && vblank_end >= vtotal) {
 431                         uint32_t vsync = I915_READ(vsync_reg);
 432                         uint32_t vsync_start = (vsync & 0xffff) + 1;
 433
 434                         vblank_start = vsync_start;
 435                         I915_WRITE(vblank_reg,
 436                                    (vblank_start - 1) |
 437                                    ((vblank_end - 1) << 16));
 438                         restore_vblank = true;
 439                 }
 440                 /* sample in the vertical border, selecting the larger one */
 441                 if (vblank_start - vactive >= vtotal - vblank_end)
 442                         vsample = (vblank_start + vactive) >> 1;
 443                 else
 444                         vsample = (vtotal + vblank_end) >> 1;
 445
 446                 /*
 447                  * Wait for the border to be displayed
 448                  */
 449                 while (I915_READ(pipe_dsl_reg) >= vactive)
 450                         ;
 451                 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
 452                         ;
 453                 /*
 454                  * Watch ST00 for an entire scanline
 455                  */
 456                 detect = 0;
 457                 count = 0;
 458                 do {
 459                         count++;
 460                         /* Read the ST00 VGA status register */
 461                         st00 = I915_READ8(VGA_MSR_WRITE);
 462                         if (st00 & (1 << 4))
 463                                 detect++;
 464                 } while ((I915_READ(pipe_dsl_reg) == dsl));
 465
 466                 /* restore vblank if necessary */
 467                 if (restore_vblank)
 468                         I915_WRITE(vblank_reg, vblank);
 469                 /*
 470                  * If more than 3/4 of the scanline detected a monitor,
 471                  * then it is assumed to be present. This works even on i830,
 472                  * where there isn't any way to force the border color across
 473                  * the screen
 474                  */
 475                 status = detect * 4 > count * 3 ?
 476                          connector_status_connected :
 477                          connector_status_disconnected;
 478         }
 479
 480         /* Restore previous settings */
 481         I915_WRITE(bclrpat_reg, save_bclrpat);
 482
 483         return status;
 484 }
 485
 486 static enum drm_connector_status
 487 intel_crt_detect(struct drm_connector *connector, bool force)
 488 {
 489         struct drm_device *dev = connector->dev;
 490         struct intel_crt *crt = intel_attached_crt(connector);
 491         enum drm_connector_status status;
 492         struct intel_load_detect_pipe tmp;
 493
 494         if (I915_HAS_HOTPLUG(dev)) {
 495                 /* We can not rely on the HPD pin always being correctly wired
 496                  * up, for example many KVM do not pass it through, and so
 497                  * only trust an assertion that the monitor is connected.
 498                  */
 499                 if (intel_crt_detect_hotplug(connector)) {
 500                         DRM_DEBUG_KMS("CRT detected via hotplug\n");
 501                         return connector_status_connected;
 502                 } else
 503                         DRM_DEBUG_KMS("CRT not detected via hotplug\n");
 504         }
 505
 506         if (intel_crt_detect_ddc(connector))
 507                 return connector_status_connected;
 508
 509         /* Load detection is broken on HPD capable machines. Whoever wants a
 510          * broken monitor (without edid) to work behind a broken kvm (that fails
 511          * to have the right resistors for HP detection) needs to fix this up.
 512          * For now just bail out. */
 513         if (I915_HAS_HOTPLUG(dev))
 514                 return connector_status_disconnected;
 515
 516         if (!force)
 517                 return connector->status;
 518
 519         /* for pre-945g platforms use load detect */
 520         if (intel_get_load_detect_pipe(&crt->base, connector, NULL,
 521                                        &tmp)) {
 522                 if (intel_crt_detect_ddc(connector))
 523                         status = connector_status_connected;
 524                 else
 525                         status = intel_crt_load_detect(crt);
 526                 intel_release_load_detect_pipe(&crt->base, connector,
 527                                                &tmp);
 528         } else
 529                 status = connector_status_unknown;
 530
 531         return status;
 532 }
 533
 534 static void intel_crt_destroy(struct drm_connector *connector)
 535 {
 536         drm_sysfs_connector_remove(connector);
 537         drm_connector_cleanup(connector);
 538         kfree(connector);
 539 }
 540
 541 static int intel_crt_get_modes(struct drm_connector *connector)
 542 {
 543         struct drm_device *dev = connector->dev;
 544         struct drm_i915_private *dev_priv = dev->dev_private;
 545         int ret;
 546         struct i2c_adapter *i2c;
 547
 548         i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->crt_ddc_pin);
 549         ret = intel_ddc_get_modes(connector, i2c);
 550         if (ret || !IS_G4X(dev))
 551                 return ret;
 552
 553         /* Try to probe digital port for output in DVI-I -> VGA mode. */
 554         i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPB);
 555         return intel_ddc_get_modes(connector, i2c);
 556 }
 557
 558 static int intel_crt_set_property(struct drm_connector *connector,
 559                                   struct drm_property *property,
 560                                   uint64_t value)
 561 {
 562         return 0;
 563 }
 564
 565 static void intel_crt_reset(struct drm_connector *connector)
 566 {
 567         struct drm_device *dev = connector->dev;
 568         struct intel_crt *crt = intel_attached_crt(connector);
 569
 570         if (HAS_PCH_SPLIT(dev))
 571                 crt->force_hotplug_required = 1;
 572 }
 573
 574 /*
 575  * Routines for controlling stuff on the analog port
 576  */
 577
 578 static const struct drm_encoder_helper_funcs pch_encoder_funcs = {
 579         .mode_fixup = intel_crt_mode_fixup,
 580         .prepare = intel_encoder_prepare,
 581         .commit = intel_encoder_commit,
 582         .mode_set = intel_crt_mode_set,
 583         .dpms = pch_crt_dpms,
 584 };
 585
 586 static const struct drm_encoder_helper_funcs gmch_encoder_funcs = {
 587         .mode_fixup = intel_crt_mode_fixup,
 588         .prepare = intel_encoder_prepare,
 589         .commit = intel_encoder_commit,
 590         .mode_set = intel_crt_mode_set,
 591         .dpms = gmch_crt_dpms,
 592 };
 593
 594 static const struct drm_connector_funcs intel_crt_connector_funcs = {
 595         .reset = intel_crt_reset,
 596         .dpms = drm_helper_connector_dpms,
 597         .detect = intel_crt_detect,
 598         .fill_modes = drm_helper_probe_single_connector_modes,
 599         .destroy = intel_crt_destroy,
 600         .set_property = intel_crt_set_property,
 601 };
 602
 603 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
 604         .mode_valid = intel_crt_mode_valid,
 605         .get_modes = intel_crt_get_modes,
 606         .best_encoder = intel_best_encoder,
 607 };
 608
 609 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
 610         .destroy = intel_encoder_destroy,
 611 };
 612
 613 static int __init intel_no_crt_dmi_callback(const struct dmi_system_id *id)
 614 {
 615         DRM_INFO("Skipping CRT initialization for %s\n", id->ident);
 616         return 1;
 617 }
 618
 619 static const struct dmi_system_id intel_no_crt[] = {
 620         {
 621                 .callback = intel_no_crt_dmi_callback,
 622                 .ident = "ACER ZGB",
 623                 .matches = {
 624                         DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
 625                         DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
 626                 },
 627         },
 628         { }
 629 };
 630
 631 void intel_crt_init(struct drm_device *dev)
 632 {
 633         struct drm_connector *connector;
 634         struct intel_crt *crt;
 635         struct intel_connector *intel_connector;
 636         struct drm_i915_private *dev_priv = dev->dev_private;
 637         const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 638
 639         /* Skip machines without VGA that falsely report hotplug events */
 640         if (dmi_check_system(intel_no_crt))
 641                 return;
 642
 643         crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
 644         if (!crt)
 645                 return;
 646
 647         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 648         if (!intel_connector) {
 649                 kfree(crt);
 650                 return;
 651         }
 652
 653         connector = &intel_connector->base;
 654         drm_connector_init(dev, &intel_connector->base,
 655                            &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
 656
 657         drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs,
 658                          DRM_MODE_ENCODER_DAC);
 659
 660         intel_connector_attach_encoder(intel_connector, &crt->base);
 661
 662         crt->base.type = INTEL_OUTPUT_ANALOG;
 663         crt->base.clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT |
 664                                 1 << INTEL_ANALOG_CLONE_BIT |
 665                                 1 << INTEL_SDVO_LVDS_CLONE_BIT);
 666         if (IS_HASWELL(dev))
 667                 crt->base.crtc_mask = (1 << 0);
 668         else
 669                 crt->base.crtc_mask = (1 << 0) | (1 << 1);
 670
 671         if (IS_GEN2(dev))
 672                 connector->interlace_allowed = 0;
 673         else
 674                 connector->interlace_allowed = 1;
 675         connector->doublescan_allowed = 0;
 676
 677         if (HAS_PCH_SPLIT(dev))
 678                 encoder_helper_funcs = &pch_encoder_funcs;
 679         else
 680                 encoder_helper_funcs = &gmch_encoder_funcs;
 681
 682         drm_encoder_helper_add(&crt->base.base, encoder_helper_funcs);
 683         drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
 684
 685         drm_sysfs_connector_add(connector);
 686
 687         if (I915_HAS_HOTPLUG(dev))
 688                 connector->polled = DRM_CONNECTOR_POLL_HPD;
 689         else
 690                 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
 691
 692         /*
 693          * Configure the automatic hotplug detection stuff
 694          */
 695         crt->force_hotplug_required = 0;
 696         if (HAS_PCH_SPLIT(dev)) {
 697                 u32 adpa;
 698
 699                 adpa = I915_READ(PCH_ADPA);
 700                 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
 701                 adpa |= ADPA_HOTPLUG_BITS;
 702                 I915_WRITE(PCH_ADPA, adpa);
 703                 POSTING_READ(PCH_ADPA);
 704
 705                 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa);
 706                 crt->force_hotplug_required = 1;
 707         }
 708
 709         dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS;
 710 }