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