drivers/gpu/drm/i915/intel_hdmi.c

   1 /*
   2  * Copyright 2006 Dave Airlie <airlied@linux.ie>
   3  * Copyright © 2006-2009 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *      Eric Anholt <eric@anholt.net>
  26  *      Jesse Barnes <jesse.barnes@intel.com>
  27  */
  28
  29 #include <linux/i2c.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include "drmP.h"
  33 #include "drm.h"
  34 #include "drm_crtc.h"
  35 #include "drm_edid.h"
  36 #include "intel_drv.h"
  37 #include "i915_drm.h"
  38 #include "i915_drv.h"
  39
  40 static void
  41 assert_hdmi_port_disabled(struct intel_hdmi *intel_hdmi)
  42 {
  43         struct drm_device *dev = intel_hdmi->base.base.dev;
  44         struct drm_i915_private *dev_priv = dev->dev_private;
  45         uint32_t enabled_bits;
  46
  47         enabled_bits = IS_HASWELL(dev) ? DDI_BUF_CTL_ENABLE : SDVO_ENABLE;
  48
  49         WARN(I915_READ(intel_hdmi->sdvox_reg) & enabled_bits,
  50              "HDMI port enabled, expecting disabled\n");
  51 }
  52
  53 struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
  54 {
  55         return container_of(encoder, struct intel_hdmi, base.base);
  56 }
  57
  58 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
  59 {
  60         return container_of(intel_attached_encoder(connector),
  61                             struct intel_hdmi, base);
  62 }
  63
  64 void intel_dip_infoframe_csum(struct dip_infoframe *frame)
  65 {
  66         uint8_t *data = (uint8_t *)frame;
  67         uint8_t sum = 0;
  68         unsigned i;
  69
  70         frame->checksum = 0;
  71         frame->ecc = 0;
  72
  73         for (i = 0; i < frame->len + DIP_HEADER_SIZE; i++)
  74                 sum += data[i];
  75
  76         frame->checksum = 0x100 - sum;
  77 }
  78
  79 static u32 g4x_infoframe_index(struct dip_infoframe *frame)
  80 {
  81         switch (frame->type) {
  82         case DIP_TYPE_AVI:
  83                 return VIDEO_DIP_SELECT_AVI;
  84         case DIP_TYPE_SPD:
  85                 return VIDEO_DIP_SELECT_SPD;
  86         default:
  87                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
  88                 return 0;
  89         }
  90 }
  91
  92 static u32 g4x_infoframe_enable(struct dip_infoframe *frame)
  93 {
  94         switch (frame->type) {
  95         case DIP_TYPE_AVI:
  96                 return VIDEO_DIP_ENABLE_AVI;
  97         case DIP_TYPE_SPD:
  98                 return VIDEO_DIP_ENABLE_SPD;
  99         default:
 100                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 101                 return 0;
 102         }
 103 }
 104
 105 static u32 hsw_infoframe_enable(struct dip_infoframe *frame)
 106 {
 107         switch (frame->type) {
 108         case DIP_TYPE_AVI:
 109                 return VIDEO_DIP_ENABLE_AVI_HSW;
 110         case DIP_TYPE_SPD:
 111                 return VIDEO_DIP_ENABLE_SPD_HSW;
 112         default:
 113                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 114                 return 0;
 115         }
 116 }
 117
 118 static u32 hsw_infoframe_data_reg(struct dip_infoframe *frame, enum pipe pipe)
 119 {
 120         switch (frame->type) {
 121         case DIP_TYPE_AVI:
 122                 return HSW_TVIDEO_DIP_AVI_DATA(pipe);
 123         case DIP_TYPE_SPD:
 124                 return HSW_TVIDEO_DIP_SPD_DATA(pipe);
 125         default:
 126                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 127                 return 0;
 128         }
 129 }
 130
 131 static void g4x_write_infoframe(struct drm_encoder *encoder,
 132                                 struct dip_infoframe *frame)
 133 {
 134         uint32_t *data = (uint32_t *)frame;
 135         struct drm_device *dev = encoder->dev;
 136         struct drm_i915_private *dev_priv = dev->dev_private;
 137         u32 val = I915_READ(VIDEO_DIP_CTL);
 138         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 139
 140         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 141
 142         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 143         val |= g4x_infoframe_index(frame);
 144
 145         val &= ~g4x_infoframe_enable(frame);
 146
 147         I915_WRITE(VIDEO_DIP_CTL, val);
 148
 149         mmiowb();
 150         for (i = 0; i < len; i += 4) {
 151                 I915_WRITE(VIDEO_DIP_DATA, *data);
 152                 data++;
 153         }
 154         mmiowb();
 155
 156         val |= g4x_infoframe_enable(frame);
 157         val &= ~VIDEO_DIP_FREQ_MASK;
 158         val |= VIDEO_DIP_FREQ_VSYNC;
 159
 160         I915_WRITE(VIDEO_DIP_CTL, val);
 161         POSTING_READ(VIDEO_DIP_CTL);
 162 }
 163
 164 static void ibx_write_infoframe(struct drm_encoder *encoder,
 165                                 struct dip_infoframe *frame)
 166 {
 167         uint32_t *data = (uint32_t *)frame;
 168         struct drm_device *dev = encoder->dev;
 169         struct drm_i915_private *dev_priv = dev->dev_private;
 170         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 171         int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 172         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 173         u32 val = I915_READ(reg);
 174
 175         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 176
 177         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 178         val |= g4x_infoframe_index(frame);
 179
 180         val &= ~g4x_infoframe_enable(frame);
 181
 182         I915_WRITE(reg, val);
 183
 184         mmiowb();
 185         for (i = 0; i < len; i += 4) {
 186                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 187                 data++;
 188         }
 189         mmiowb();
 190
 191         val |= g4x_infoframe_enable(frame);
 192         val &= ~VIDEO_DIP_FREQ_MASK;
 193         val |= VIDEO_DIP_FREQ_VSYNC;
 194
 195         I915_WRITE(reg, val);
 196         POSTING_READ(reg);
 197 }
 198
 199 static void cpt_write_infoframe(struct drm_encoder *encoder,
 200                                 struct dip_infoframe *frame)
 201 {
 202         uint32_t *data = (uint32_t *)frame;
 203         struct drm_device *dev = encoder->dev;
 204         struct drm_i915_private *dev_priv = dev->dev_private;
 205         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 206         int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 207         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 208         u32 val = I915_READ(reg);
 209
 210         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 211
 212         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 213         val |= g4x_infoframe_index(frame);
 214
 215         /* The DIP control register spec says that we need to update the AVI
 216          * infoframe without clearing its enable bit */
 217         if (frame->type != DIP_TYPE_AVI)
 218                 val &= ~g4x_infoframe_enable(frame);
 219
 220         I915_WRITE(reg, val);
 221
 222         mmiowb();
 223         for (i = 0; i < len; i += 4) {
 224                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 225                 data++;
 226         }
 227         mmiowb();
 228
 229         val |= g4x_infoframe_enable(frame);
 230         val &= ~VIDEO_DIP_FREQ_MASK;
 231         val |= VIDEO_DIP_FREQ_VSYNC;
 232
 233         I915_WRITE(reg, val);
 234         POSTING_READ(reg);
 235 }
 236
 237 static void vlv_write_infoframe(struct drm_encoder *encoder,
 238                                      struct dip_infoframe *frame)
 239 {
 240         uint32_t *data = (uint32_t *)frame;
 241         struct drm_device *dev = encoder->dev;
 242         struct drm_i915_private *dev_priv = dev->dev_private;
 243         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 244         int reg = VLV_TVIDEO_DIP_CTL(intel_crtc->pipe);
 245         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 246         u32 val = I915_READ(reg);
 247
 248         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 249
 250         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 251         val |= g4x_infoframe_index(frame);
 252
 253         val &= ~g4x_infoframe_enable(frame);
 254
 255         I915_WRITE(reg, val);
 256
 257         mmiowb();
 258         for (i = 0; i < len; i += 4) {
 259                 I915_WRITE(VLV_TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 260                 data++;
 261         }
 262         mmiowb();
 263
 264         val |= g4x_infoframe_enable(frame);
 265         val &= ~VIDEO_DIP_FREQ_MASK;
 266         val |= VIDEO_DIP_FREQ_VSYNC;
 267
 268         I915_WRITE(reg, val);
 269         POSTING_READ(reg);
 270 }
 271
 272 static void hsw_write_infoframe(struct drm_encoder *encoder,
 273                                 struct dip_infoframe *frame)
 274 {
 275         uint32_t *data = (uint32_t *)frame;
 276         struct drm_device *dev = encoder->dev;
 277         struct drm_i915_private *dev_priv = dev->dev_private;
 278         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 279         u32 ctl_reg = HSW_TVIDEO_DIP_CTL(intel_crtc->pipe);
 280         u32 data_reg = hsw_infoframe_data_reg(frame, intel_crtc->pipe);
 281         unsigned int i, len = DIP_HEADER_SIZE + frame->len;
 282         u32 val = I915_READ(ctl_reg);
 283
 284         if (data_reg == 0)
 285                 return;
 286
 287         val &= ~hsw_infoframe_enable(frame);
 288         I915_WRITE(ctl_reg, val);
 289
 290         mmiowb();
 291         for (i = 0; i < len; i += 4) {
 292                 I915_WRITE(data_reg + i, *data);
 293                 data++;
 294         }
 295         mmiowb();
 296
 297         val |= hsw_infoframe_enable(frame);
 298         I915_WRITE(ctl_reg, val);
 299         POSTING_READ(ctl_reg);
 300 }
 301
 302 static void intel_set_infoframe(struct drm_encoder *encoder,
 303                                 struct dip_infoframe *frame)
 304 {
 305         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 306
 307         intel_dip_infoframe_csum(frame);
 308         intel_hdmi->write_infoframe(encoder, frame);
 309 }
 310
 311 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
 312                                          struct drm_display_mode *adjusted_mode)
 313 {
 314         struct dip_infoframe avi_if = {
 315                 .type = DIP_TYPE_AVI,
 316                 .ver = DIP_VERSION_AVI,
 317                 .len = DIP_LEN_AVI,
 318         };
 319
 320         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
 321                 avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
 322
 323         intel_set_infoframe(encoder, &avi_if);
 324 }
 325
 326 static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
 327 {
 328         struct dip_infoframe spd_if;
 329
 330         memset(&spd_if, 0, sizeof(spd_if));
 331         spd_if.type = DIP_TYPE_SPD;
 332         spd_if.ver = DIP_VERSION_SPD;
 333         spd_if.len = DIP_LEN_SPD;
 334         strcpy(spd_if.body.spd.vn, "Intel");
 335         strcpy(spd_if.body.spd.pd, "Integrated gfx");
 336         spd_if.body.spd.sdi = DIP_SPD_PC;
 337
 338         intel_set_infoframe(encoder, &spd_if);
 339 }
 340
 341 static void g4x_set_infoframes(struct drm_encoder *encoder,
 342                                struct drm_display_mode *adjusted_mode)
 343 {
 344         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 345         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 346         u32 reg = VIDEO_DIP_CTL;
 347         u32 val = I915_READ(reg);
 348         u32 port;
 349
 350         assert_hdmi_port_disabled(intel_hdmi);
 351
 352         /* If the registers were not initialized yet, they might be zeroes,
 353          * which means we're selecting the AVI DIP and we're setting its
 354          * frequency to once. This seems to really confuse the HW and make
 355          * things stop working (the register spec says the AVI always needs to
 356          * be sent every VSync). So here we avoid writing to the register more
 357          * than we need and also explicitly select the AVI DIP and explicitly
 358          * set its frequency to every VSync. Avoiding to write it twice seems to
 359          * be enough to solve the problem, but being defensive shouldn't hurt us
 360          * either. */
 361         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 362
 363         if (!intel_hdmi->has_hdmi_sink) {
 364                 if (!(val & VIDEO_DIP_ENABLE))
 365                         return;
 366                 val &= ~VIDEO_DIP_ENABLE;
 367                 I915_WRITE(reg, val);
 368                 POSTING_READ(reg);
 369                 return;
 370         }
 371
 372         switch (intel_hdmi->sdvox_reg) {
 373         case SDVOB:
 374                 port = VIDEO_DIP_PORT_B;
 375                 break;
 376         case SDVOC:
 377                 port = VIDEO_DIP_PORT_C;
 378                 break;
 379         default:
 380                 return;
 381         }
 382
 383         if (port != (val & VIDEO_DIP_PORT_MASK)) {
 384                 if (val & VIDEO_DIP_ENABLE) {
 385                         val &= ~VIDEO_DIP_ENABLE;
 386                         I915_WRITE(reg, val);
 387                         POSTING_READ(reg);
 388                 }
 389                 val &= ~VIDEO_DIP_PORT_MASK;
 390                 val |= port;
 391         }
 392
 393         val |= VIDEO_DIP_ENABLE;
 394         val &= ~VIDEO_DIP_ENABLE_VENDOR;
 395
 396         I915_WRITE(reg, val);
 397         POSTING_READ(reg);
 398
 399         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 400         intel_hdmi_set_spd_infoframe(encoder);
 401 }
 402
 403 static void ibx_set_infoframes(struct drm_encoder *encoder,
 404                                struct drm_display_mode *adjusted_mode)
 405 {
 406         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 407         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 408         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 409         u32 reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 410         u32 val = I915_READ(reg);
 411         u32 port;
 412
 413         assert_hdmi_port_disabled(intel_hdmi);
 414
 415         /* See the big comment in g4x_set_infoframes() */
 416         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 417
 418         if (!intel_hdmi->has_hdmi_sink) {
 419                 if (!(val & VIDEO_DIP_ENABLE))
 420                         return;
 421                 val &= ~VIDEO_DIP_ENABLE;
 422                 I915_WRITE(reg, val);
 423                 POSTING_READ(reg);
 424                 return;
 425         }
 426
 427         switch (intel_hdmi->sdvox_reg) {
 428         case HDMIB:
 429                 port = VIDEO_DIP_PORT_B;
 430                 break;
 431         case HDMIC:
 432                 port = VIDEO_DIP_PORT_C;
 433                 break;
 434         case HDMID:
 435                 port = VIDEO_DIP_PORT_D;
 436                 break;
 437         default:
 438                 return;
 439         }
 440
 441         if (port != (val & VIDEO_DIP_PORT_MASK)) {
 442                 if (val & VIDEO_DIP_ENABLE) {
 443                         val &= ~VIDEO_DIP_ENABLE;
 444                         I915_WRITE(reg, val);
 445                         POSTING_READ(reg);
 446                 }
 447                 val &= ~VIDEO_DIP_PORT_MASK;
 448                 val |= port;
 449         }
 450
 451         val |= VIDEO_DIP_ENABLE;
 452         val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 453                  VIDEO_DIP_ENABLE_GCP);
 454
 455         I915_WRITE(reg, val);
 456         POSTING_READ(reg);
 457
 458         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 459         intel_hdmi_set_spd_infoframe(encoder);
 460 }
 461
 462 static void cpt_set_infoframes(struct drm_encoder *encoder,
 463                                struct drm_display_mode *adjusted_mode)
 464 {
 465         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 466         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 467         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 468         u32 reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 469         u32 val = I915_READ(reg);
 470
 471         assert_hdmi_port_disabled(intel_hdmi);
 472
 473         /* See the big comment in g4x_set_infoframes() */
 474         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 475
 476         if (!intel_hdmi->has_hdmi_sink) {
 477                 if (!(val & VIDEO_DIP_ENABLE))
 478                         return;
 479                 val &= ~(VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI);
 480                 I915_WRITE(reg, val);
 481                 POSTING_READ(reg);
 482                 return;
 483         }
 484
 485         /* Set both together, unset both together: see the spec. */
 486         val |= VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI;
 487         val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 488                  VIDEO_DIP_ENABLE_GCP);
 489
 490         I915_WRITE(reg, val);
 491         POSTING_READ(reg);
 492
 493         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 494         intel_hdmi_set_spd_infoframe(encoder);
 495 }
 496
 497 static void vlv_set_infoframes(struct drm_encoder *encoder,
 498                                struct drm_display_mode *adjusted_mode)
 499 {
 500         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 501         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 502         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 503         u32 reg = VLV_TVIDEO_DIP_CTL(intel_crtc->pipe);
 504         u32 val = I915_READ(reg);
 505
 506         assert_hdmi_port_disabled(intel_hdmi);
 507
 508         /* See the big comment in g4x_set_infoframes() */
 509         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 510
 511         if (!intel_hdmi->has_hdmi_sink) {
 512                 if (!(val & VIDEO_DIP_ENABLE))
 513                         return;
 514                 val &= ~VIDEO_DIP_ENABLE;
 515                 I915_WRITE(reg, val);
 516                 POSTING_READ(reg);
 517                 return;
 518         }
 519
 520         val |= VIDEO_DIP_ENABLE;
 521         val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 522                  VIDEO_DIP_ENABLE_GCP);
 523
 524         I915_WRITE(reg, val);
 525         POSTING_READ(reg);
 526
 527         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 528         intel_hdmi_set_spd_infoframe(encoder);
 529 }
 530
 531 static void hsw_set_infoframes(struct drm_encoder *encoder,
 532                                struct drm_display_mode *adjusted_mode)
 533 {
 534         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 535         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 536         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 537         u32 reg = HSW_TVIDEO_DIP_CTL(intel_crtc->pipe);
 538         u32 val = I915_READ(reg);
 539
 540         assert_hdmi_port_disabled(intel_hdmi);
 541
 542         if (!intel_hdmi->has_hdmi_sink) {
 543                 I915_WRITE(reg, 0);
 544                 POSTING_READ(reg);
 545                 return;
 546         }
 547
 548         val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_GCP_HSW |
 549                  VIDEO_DIP_ENABLE_VS_HSW | VIDEO_DIP_ENABLE_GMP_HSW);
 550
 551         I915_WRITE(reg, val);
 552         POSTING_READ(reg);
 553
 554         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 555         intel_hdmi_set_spd_infoframe(encoder);
 556 }
 557
 558 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 559                                 struct drm_display_mode *mode,
 560                                 struct drm_display_mode *adjusted_mode)
 561 {
 562         struct drm_device *dev = encoder->dev;
 563         struct drm_i915_private *dev_priv = dev->dev_private;
 564         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 565         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 566         u32 sdvox;
 567
 568         sdvox = SDVO_ENCODING_HDMI;
 569         if (!HAS_PCH_SPLIT(dev))
 570                 sdvox |= intel_hdmi->color_range;
 571         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 572                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
 573         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 574                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
 575
 576         if (intel_crtc->bpp > 24)
 577                 sdvox |= COLOR_FORMAT_12bpc;
 578         else
 579                 sdvox |= COLOR_FORMAT_8bpc;
 580
 581         /* Required on CPT */
 582         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 583                 sdvox |= HDMI_MODE_SELECT;
 584
 585         if (intel_hdmi->has_audio) {
 586                 DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n",
 587                                  pipe_name(intel_crtc->pipe));
 588                 sdvox |= SDVO_AUDIO_ENABLE;
 589                 sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
 590                 intel_write_eld(encoder, adjusted_mode);
 591         }
 592
 593         if (HAS_PCH_CPT(dev))
 594                 sdvox |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
 595         else if (intel_crtc->pipe == PIPE_B)
 596                 sdvox |= SDVO_PIPE_B_SELECT;
 597
 598         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 599         POSTING_READ(intel_hdmi->sdvox_reg);
 600
 601         intel_hdmi->set_infoframes(encoder, adjusted_mode);
 602 }
 603
 604 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 605 {
 606         struct drm_device *dev = encoder->dev;
 607         struct drm_i915_private *dev_priv = dev->dev_private;
 608         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 609         u32 temp;
 610         u32 enable_bits = SDVO_ENABLE;
 611
 612         if (intel_hdmi->has_audio || mode != DRM_MODE_DPMS_ON)
 613                 enable_bits |= SDVO_AUDIO_ENABLE;
 614
 615         temp = I915_READ(intel_hdmi->sdvox_reg);
 616
 617         /* HW workaround for IBX, we need to move the port to transcoder A
 618          * before disabling it. */
 619         if (HAS_PCH_IBX(dev)) {
 620                 struct drm_crtc *crtc = encoder->crtc;
 621                 int pipe = crtc ? to_intel_crtc(crtc)->pipe : -1;
 622
 623                 if (mode != DRM_MODE_DPMS_ON) {
 624                         if (temp & SDVO_PIPE_B_SELECT) {
 625                                 temp &= ~SDVO_PIPE_B_SELECT;
 626                                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 627                                 POSTING_READ(intel_hdmi->sdvox_reg);
 628
 629                                 /* Again we need to write this twice. */
 630                                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 631                                 POSTING_READ(intel_hdmi->sdvox_reg);
 632
 633                                 /* Transcoder selection bits only update
 634                                  * effectively on vblank. */
 635                                 if (crtc)
 636                                         intel_wait_for_vblank(dev, pipe);
 637                                 else
 638                                         msleep(50);
 639                         }
 640                 } else {
 641                         /* Restore the transcoder select bit. */
 642                         if (pipe == PIPE_B)
 643                                 enable_bits |= SDVO_PIPE_B_SELECT;
 644                 }
 645         }
 646
 647         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 648          * we do this anyway which shows more stable in testing.
 649          */
 650         if (HAS_PCH_SPLIT(dev)) {
 651                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 652                 POSTING_READ(intel_hdmi->sdvox_reg);
 653         }
 654
 655         if (mode != DRM_MODE_DPMS_ON) {
 656                 temp &= ~enable_bits;
 657         } else {
 658                 temp |= enable_bits;
 659         }
 660
 661         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 662         POSTING_READ(intel_hdmi->sdvox_reg);
 663
 664         /* HW workaround, need to write this twice for issue that may result
 665          * in first write getting masked.
 666          */
 667         if (HAS_PCH_SPLIT(dev)) {
 668                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 669                 POSTING_READ(intel_hdmi->sdvox_reg);
 670         }
 671 }
 672
 673 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 674                                  struct drm_display_mode *mode)
 675 {
 676         if (mode->clock > 165000)
 677                 return MODE_CLOCK_HIGH;
 678         if (mode->clock < 20000)
 679                 return MODE_CLOCK_LOW;
 680
 681         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 682                 return MODE_NO_DBLESCAN;
 683
 684         return MODE_OK;
 685 }
 686
 687 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 688                                   const struct drm_display_mode *mode,
 689                                   struct drm_display_mode *adjusted_mode)
 690 {
 691         return true;
 692 }
 693
 694 static bool g4x_hdmi_connected(struct intel_hdmi *intel_hdmi)
 695 {
 696         struct drm_device *dev = intel_hdmi->base.base.dev;
 697         struct drm_i915_private *dev_priv = dev->dev_private;
 698         uint32_t bit;
 699
 700         switch (intel_hdmi->sdvox_reg) {
 701         case SDVOB:
 702                 bit = HDMIB_HOTPLUG_LIVE_STATUS;
 703                 break;
 704         case SDVOC:
 705                 bit = HDMIC_HOTPLUG_LIVE_STATUS;
 706                 break;
 707         default:
 708                 bit = 0;
 709                 break;
 710         }
 711
 712         return I915_READ(PORT_HOTPLUG_STAT) & bit;
 713 }
 714
 715 static enum drm_connector_status
 716 intel_hdmi_detect(struct drm_connector *connector, bool force)
 717 {
 718         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 719         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 720         struct edid *edid;
 721         enum drm_connector_status status = connector_status_disconnected;
 722
 723         if (IS_G4X(connector->dev) && !g4x_hdmi_connected(intel_hdmi))
 724                 return status;
 725
 726         intel_hdmi->has_hdmi_sink = false;
 727         intel_hdmi->has_audio = false;
 728         edid = drm_get_edid(connector,
 729                             intel_gmbus_get_adapter(dev_priv,
 730                                                     intel_hdmi->ddc_bus));
 731
 732         if (edid) {
 733                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 734                         status = connector_status_connected;
 735                         if (intel_hdmi->force_audio != HDMI_AUDIO_OFF_DVI)
 736                                 intel_hdmi->has_hdmi_sink =
 737                                                 drm_detect_hdmi_monitor(edid);
 738                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 739                 }
 740                 connector->display_info.raw_edid = NULL;
 741                 kfree(edid);
 742         }
 743
 744         if (status == connector_status_connected) {
 745                 if (intel_hdmi->force_audio != HDMI_AUDIO_AUTO)
 746                         intel_hdmi->has_audio =
 747                                 (intel_hdmi->force_audio == HDMI_AUDIO_ON);
 748         }
 749
 750         return status;
 751 }
 752
 753 static int intel_hdmi_get_modes(struct drm_connector *connector)
 754 {
 755         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 756         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 757
 758         /* We should parse the EDID data and find out if it's an HDMI sink so
 759          * we can send audio to it.
 760          */
 761
 762         return intel_ddc_get_modes(connector,
 763                                    intel_gmbus_get_adapter(dev_priv,
 764                                                            intel_hdmi->ddc_bus));
 765 }
 766
 767 static bool
 768 intel_hdmi_detect_audio(struct drm_connector *connector)
 769 {
 770         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 771         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 772         struct edid *edid;
 773         bool has_audio = false;
 774
 775         edid = drm_get_edid(connector,
 776                             intel_gmbus_get_adapter(dev_priv,
 777                                                     intel_hdmi->ddc_bus));
 778         if (edid) {
 779                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
 780                         has_audio = drm_detect_monitor_audio(edid);
 781
 782                 connector->display_info.raw_edid = NULL;
 783                 kfree(edid);
 784         }
 785
 786         return has_audio;
 787 }
 788
 789 static int
 790 intel_hdmi_set_property(struct drm_connector *connector,
 791                         struct drm_property *property,
 792                         uint64_t val)
 793 {
 794         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 795         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 796         int ret;
 797
 798         ret = drm_connector_property_set_value(connector, property, val);
 799         if (ret)
 800                 return ret;
 801
 802         if (property == dev_priv->force_audio_property) {
 803                 enum hdmi_force_audio i = val;
 804                 bool has_audio;
 805
 806                 if (i == intel_hdmi->force_audio)
 807                         return 0;
 808
 809                 intel_hdmi->force_audio = i;
 810
 811                 if (i == HDMI_AUDIO_AUTO)
 812                         has_audio = intel_hdmi_detect_audio(connector);
 813                 else
 814                         has_audio = (i == HDMI_AUDIO_ON);
 815
 816                 if (i == HDMI_AUDIO_OFF_DVI)
 817                         intel_hdmi->has_hdmi_sink = 0;
 818
 819                 intel_hdmi->has_audio = has_audio;
 820                 goto done;
 821         }
 822
 823         if (property == dev_priv->broadcast_rgb_property) {
 824                 if (val == !!intel_hdmi->color_range)
 825                         return 0;
 826
 827                 intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
 828                 goto done;
 829         }
 830
 831         return -EINVAL;
 832
 833 done:
 834         if (intel_hdmi->base.base.crtc) {
 835                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 836                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 837                                          crtc->x, crtc->y,
 838                                          crtc->fb);
 839         }
 840
 841         return 0;
 842 }
 843
 844 static void intel_hdmi_destroy(struct drm_connector *connector)
 845 {
 846         drm_sysfs_connector_remove(connector);
 847         drm_connector_cleanup(connector);
 848         kfree(connector);
 849 }
 850
 851 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs_hsw = {
 852         .dpms = intel_ddi_dpms,
 853         .mode_fixup = intel_hdmi_mode_fixup,
 854         .prepare = intel_encoder_prepare,
 855         .mode_set = intel_ddi_mode_set,
 856         .commit = intel_encoder_commit,
 857 };
 858
 859 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 860         .dpms = intel_hdmi_dpms,
 861         .mode_fixup = intel_hdmi_mode_fixup,
 862         .prepare = intel_encoder_prepare,
 863         .mode_set = intel_hdmi_mode_set,
 864         .commit = intel_encoder_commit,
 865 };
 866
 867 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 868         .dpms = drm_helper_connector_dpms,
 869         .detect = intel_hdmi_detect,
 870         .fill_modes = drm_helper_probe_single_connector_modes,
 871         .set_property = intel_hdmi_set_property,
 872         .destroy = intel_hdmi_destroy,
 873 };
 874
 875 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 876         .get_modes = intel_hdmi_get_modes,
 877         .mode_valid = intel_hdmi_mode_valid,
 878         .best_encoder = intel_best_encoder,
 879 };
 880
 881 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 882         .destroy = intel_encoder_destroy,
 883 };
 884
 885 static void
 886 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 887 {
 888         intel_attach_force_audio_property(connector);
 889         intel_attach_broadcast_rgb_property(connector);
 890 }
 891
 892 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 893 {
 894         struct drm_i915_private *dev_priv = dev->dev_private;
 895         struct drm_connector *connector;
 896         struct intel_encoder *intel_encoder;
 897         struct intel_connector *intel_connector;
 898         struct intel_hdmi *intel_hdmi;
 899
 900         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 901         if (!intel_hdmi)
 902                 return;
 903
 904         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 905         if (!intel_connector) {
 906                 kfree(intel_hdmi);
 907                 return;
 908         }
 909
 910         intel_encoder = &intel_hdmi->base;
 911         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 912                          DRM_MODE_ENCODER_TMDS);
 913
 914         connector = &intel_connector->base;
 915         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 916                            DRM_MODE_CONNECTOR_HDMIA);
 917         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 918
 919         intel_encoder->type = INTEL_OUTPUT_HDMI;
 920
 921         connector->polled = DRM_CONNECTOR_POLL_HPD;
 922         connector->interlace_allowed = 1;
 923         connector->doublescan_allowed = 0;
 924         intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 925
 926         /* Set up the DDC bus. */
 927         if (sdvox_reg == SDVOB) {
 928                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 929                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 930                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 931         } else if (sdvox_reg == SDVOC) {
 932                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 933                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 934                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 935         } else if (sdvox_reg == HDMIB) {
 936                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 937                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 938                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 939         } else if (sdvox_reg == HDMIC) {
 940                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 941                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 942                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 943         } else if (sdvox_reg == HDMID) {
 944                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 945                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 946                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 947         } else if (sdvox_reg == DDI_BUF_CTL(PORT_B)) {
 948                 DRM_DEBUG_DRIVER("LPT: detected output on DDI B\n");
 949                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 950                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 951                 intel_hdmi->ddi_port = PORT_B;
 952                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 953         } else if (sdvox_reg == DDI_BUF_CTL(PORT_C)) {
 954                 DRM_DEBUG_DRIVER("LPT: detected output on DDI C\n");
 955                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 956                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 957                 intel_hdmi->ddi_port = PORT_C;
 958                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 959         } else if (sdvox_reg == DDI_BUF_CTL(PORT_D)) {
 960                 DRM_DEBUG_DRIVER("LPT: detected output on DDI D\n");
 961                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 962                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 963                 intel_hdmi->ddi_port = PORT_D;
 964                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 965         } else {
 966                 /* If we got an unknown sdvox_reg, things are pretty much broken
 967                  * in a way that we should let the kernel know about it */
 968                 BUG();
 969         }
 970
 971         intel_hdmi->sdvox_reg = sdvox_reg;
 972
 973         if (!HAS_PCH_SPLIT(dev)) {
 974                 intel_hdmi->write_infoframe = g4x_write_infoframe;
 975                 intel_hdmi->set_infoframes = g4x_set_infoframes;
 976         } else if (IS_VALLEYVIEW(dev)) {
 977                 intel_hdmi->write_infoframe = vlv_write_infoframe;
 978                 intel_hdmi->set_infoframes = vlv_set_infoframes;
 979         } else if (IS_HASWELL(dev)) {
 980                 intel_hdmi->write_infoframe = hsw_write_infoframe;
 981                 intel_hdmi->set_infoframes = hsw_set_infoframes;
 982         } else if (HAS_PCH_IBX(dev)) {
 983                 intel_hdmi->write_infoframe = ibx_write_infoframe;
 984                 intel_hdmi->set_infoframes = ibx_set_infoframes;
 985         } else {
 986                 intel_hdmi->write_infoframe = cpt_write_infoframe;
 987                 intel_hdmi->set_infoframes = cpt_set_infoframes;
 988         }
 989
 990         if (IS_HASWELL(dev))
 991                 drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs_hsw);
 992         else
 993                 drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 994
 995         intel_hdmi_add_properties(intel_hdmi, connector);
 996
 997         intel_connector_attach_encoder(intel_connector, intel_encoder);
 998         drm_sysfs_connector_add(connector);
 999
1000         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
1001          * 0xd.  Failure to do so will result in spurious interrupts being
1002          * generated on the port when a cable is not attached.
1003          */
1004         if (IS_G4X(dev) && !IS_GM45(dev)) {
1005                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
1006                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
1007         }
1008 }