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 struct drm_device *intel_hdmi_to_dev(struct intel_hdmi *intel_hdmi)
  40 {
  41         return hdmi_to_dig_port(intel_hdmi)->base.base.dev;
  42 }
  43
  44 static void
  45 assert_hdmi_port_disabled(struct intel_hdmi *intel_hdmi)
  46 {
  47         struct drm_device *dev = intel_hdmi_to_dev(intel_hdmi);
  48         struct drm_i915_private *dev_priv = dev->dev_private;
  49         uint32_t enabled_bits;
  50
  51         enabled_bits = HAS_DDI(dev) ? DDI_BUF_CTL_ENABLE : SDVO_ENABLE;
  52
  53         WARN(I915_READ(intel_hdmi->hdmi_reg) & enabled_bits,
  54              "HDMI port enabled, expecting disabled\n");
  55 }
  56
  57 struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
  58 {
  59         struct intel_digital_port *intel_dig_port =
  60                 container_of(encoder, struct intel_digital_port, base.base);
  61         return &intel_dig_port->hdmi;
  62 }
  63
  64 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
  65 {
  66         return enc_to_intel_hdmi(&intel_attached_encoder(connector)->base);
  67 }
  68
  69 void intel_dip_infoframe_csum(struct dip_infoframe *frame)
  70 {
  71         uint8_t *data = (uint8_t *)frame;
  72         uint8_t sum = 0;
  73         unsigned i;
  74
  75         frame->checksum = 0;
  76         frame->ecc = 0;
  77
  78         for (i = 0; i < frame->len + DIP_HEADER_SIZE; i++)
  79                 sum += data[i];
  80
  81         frame->checksum = 0x100 - sum;
  82 }
  83
  84 static u32 g4x_infoframe_index(struct dip_infoframe *frame)
  85 {
  86         switch (frame->type) {
  87         case DIP_TYPE_AVI:
  88                 return VIDEO_DIP_SELECT_AVI;
  89         case DIP_TYPE_SPD:
  90                 return VIDEO_DIP_SELECT_SPD;
  91         default:
  92                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
  93                 return 0;
  94         }
  95 }
  96
  97 static u32 g4x_infoframe_enable(struct dip_infoframe *frame)
  98 {
  99         switch (frame->type) {
 100         case DIP_TYPE_AVI:
 101                 return VIDEO_DIP_ENABLE_AVI;
 102         case DIP_TYPE_SPD:
 103                 return VIDEO_DIP_ENABLE_SPD;
 104         default:
 105                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 106                 return 0;
 107         }
 108 }
 109
 110 static u32 hsw_infoframe_enable(struct dip_infoframe *frame)
 111 {
 112         switch (frame->type) {
 113         case DIP_TYPE_AVI:
 114                 return VIDEO_DIP_ENABLE_AVI_HSW;
 115         case DIP_TYPE_SPD:
 116                 return VIDEO_DIP_ENABLE_SPD_HSW;
 117         default:
 118                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 119                 return 0;
 120         }
 121 }
 122
 123 static u32 hsw_infoframe_data_reg(struct dip_infoframe *frame,
 124                                   enum transcoder cpu_transcoder)
 125 {
 126         switch (frame->type) {
 127         case DIP_TYPE_AVI:
 128                 return HSW_TVIDEO_DIP_AVI_DATA(cpu_transcoder);
 129         case DIP_TYPE_SPD:
 130                 return HSW_TVIDEO_DIP_SPD_DATA(cpu_transcoder);
 131         default:
 132                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 133                 return 0;
 134         }
 135 }
 136
 137 static void g4x_write_infoframe(struct drm_encoder *encoder,
 138                                 struct dip_infoframe *frame)
 139 {
 140         uint32_t *data = (uint32_t *)frame;
 141         struct drm_device *dev = encoder->dev;
 142         struct drm_i915_private *dev_priv = dev->dev_private;
 143         u32 val = I915_READ(VIDEO_DIP_CTL);
 144         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 145
 146         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 147
 148         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 149         val |= g4x_infoframe_index(frame);
 150
 151         val &= ~g4x_infoframe_enable(frame);
 152
 153         I915_WRITE(VIDEO_DIP_CTL, val);
 154
 155         mmiowb();
 156         for (i = 0; i < len; i += 4) {
 157                 I915_WRITE(VIDEO_DIP_DATA, *data);
 158                 data++;
 159         }
 160         /* Write every possible data byte to force correct ECC calculation. */
 161         for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 162                 I915_WRITE(VIDEO_DIP_DATA, 0);
 163         mmiowb();
 164
 165         val |= g4x_infoframe_enable(frame);
 166         val &= ~VIDEO_DIP_FREQ_MASK;
 167         val |= VIDEO_DIP_FREQ_VSYNC;
 168
 169         I915_WRITE(VIDEO_DIP_CTL, val);
 170         POSTING_READ(VIDEO_DIP_CTL);
 171 }
 172
 173 static void ibx_write_infoframe(struct drm_encoder *encoder,
 174                                 struct dip_infoframe *frame)
 175 {
 176         uint32_t *data = (uint32_t *)frame;
 177         struct drm_device *dev = encoder->dev;
 178         struct drm_i915_private *dev_priv = dev->dev_private;
 179         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 180         int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 181         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 182         u32 val = I915_READ(reg);
 183
 184         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 185
 186         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 187         val |= g4x_infoframe_index(frame);
 188
 189         val &= ~g4x_infoframe_enable(frame);
 190
 191         I915_WRITE(reg, val);
 192
 193         mmiowb();
 194         for (i = 0; i < len; i += 4) {
 195                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 196                 data++;
 197         }
 198         /* Write every possible data byte to force correct ECC calculation. */
 199         for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 200                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), 0);
 201         mmiowb();
 202
 203         val |= g4x_infoframe_enable(frame);
 204         val &= ~VIDEO_DIP_FREQ_MASK;
 205         val |= VIDEO_DIP_FREQ_VSYNC;
 206
 207         I915_WRITE(reg, val);
 208         POSTING_READ(reg);
 209 }
 210
 211 static void cpt_write_infoframe(struct drm_encoder *encoder,
 212                                 struct dip_infoframe *frame)
 213 {
 214         uint32_t *data = (uint32_t *)frame;
 215         struct drm_device *dev = encoder->dev;
 216         struct drm_i915_private *dev_priv = dev->dev_private;
 217         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 218         int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 219         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 220         u32 val = I915_READ(reg);
 221
 222         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 223
 224         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 225         val |= g4x_infoframe_index(frame);
 226
 227         /* The DIP control register spec says that we need to update the AVI
 228          * infoframe without clearing its enable bit */
 229         if (frame->type != DIP_TYPE_AVI)
 230                 val &= ~g4x_infoframe_enable(frame);
 231
 232         I915_WRITE(reg, val);
 233
 234         mmiowb();
 235         for (i = 0; i < len; i += 4) {
 236                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 237                 data++;
 238         }
 239         /* Write every possible data byte to force correct ECC calculation. */
 240         for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 241                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), 0);
 242         mmiowb();
 243
 244         val |= g4x_infoframe_enable(frame);
 245         val &= ~VIDEO_DIP_FREQ_MASK;
 246         val |= VIDEO_DIP_FREQ_VSYNC;
 247
 248         I915_WRITE(reg, val);
 249         POSTING_READ(reg);
 250 }
 251
 252 static void vlv_write_infoframe(struct drm_encoder *encoder,
 253                                      struct dip_infoframe *frame)
 254 {
 255         uint32_t *data = (uint32_t *)frame;
 256         struct drm_device *dev = encoder->dev;
 257         struct drm_i915_private *dev_priv = dev->dev_private;
 258         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 259         int reg = VLV_TVIDEO_DIP_CTL(intel_crtc->pipe);
 260         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 261         u32 val = I915_READ(reg);
 262
 263         WARN(!(val & VIDEO_DIP_ENABLE), "Writing DIP with CTL reg disabled\n");
 264
 265         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
 266         val |= g4x_infoframe_index(frame);
 267
 268         val &= ~g4x_infoframe_enable(frame);
 269
 270         I915_WRITE(reg, val);
 271
 272         mmiowb();
 273         for (i = 0; i < len; i += 4) {
 274                 I915_WRITE(VLV_TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 275                 data++;
 276         }
 277         /* Write every possible data byte to force correct ECC calculation. */
 278         for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 279                 I915_WRITE(VLV_TVIDEO_DIP_DATA(intel_crtc->pipe), 0);
 280         mmiowb();
 281
 282         val |= g4x_infoframe_enable(frame);
 283         val &= ~VIDEO_DIP_FREQ_MASK;
 284         val |= VIDEO_DIP_FREQ_VSYNC;
 285
 286         I915_WRITE(reg, val);
 287         POSTING_READ(reg);
 288 }
 289
 290 static void hsw_write_infoframe(struct drm_encoder *encoder,
 291                                 struct dip_infoframe *frame)
 292 {
 293         uint32_t *data = (uint32_t *)frame;
 294         struct drm_device *dev = encoder->dev;
 295         struct drm_i915_private *dev_priv = dev->dev_private;
 296         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 297         u32 ctl_reg = HSW_TVIDEO_DIP_CTL(intel_crtc->cpu_transcoder);
 298         u32 data_reg = hsw_infoframe_data_reg(frame, intel_crtc->cpu_transcoder);
 299         unsigned int i, len = DIP_HEADER_SIZE + frame->len;
 300         u32 val = I915_READ(ctl_reg);
 301
 302         if (data_reg == 0)
 303                 return;
 304
 305         val &= ~hsw_infoframe_enable(frame);
 306         I915_WRITE(ctl_reg, val);
 307
 308         mmiowb();
 309         for (i = 0; i < len; i += 4) {
 310                 I915_WRITE(data_reg + i, *data);
 311                 data++;
 312         }
 313         /* Write every possible data byte to force correct ECC calculation. */
 314         for (; i < VIDEO_DIP_DATA_SIZE; i += 4)
 315                 I915_WRITE(data_reg + i, 0);
 316         mmiowb();
 317
 318         val |= hsw_infoframe_enable(frame);
 319         I915_WRITE(ctl_reg, val);
 320         POSTING_READ(ctl_reg);
 321 }
 322
 323 static void intel_set_infoframe(struct drm_encoder *encoder,
 324                                 struct dip_infoframe *frame)
 325 {
 326         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 327
 328         intel_dip_infoframe_csum(frame);
 329         intel_hdmi->write_infoframe(encoder, frame);
 330 }
 331
 332 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
 333                                          struct drm_display_mode *adjusted_mode)
 334 {
 335         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 336         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 337         struct dip_infoframe avi_if = {
 338                 .type = DIP_TYPE_AVI,
 339                 .ver = DIP_VERSION_AVI,
 340                 .len = DIP_LEN_AVI,
 341         };
 342
 343         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
 344                 avi_if.body.avi.YQ_CN_PR |= DIP_AVI_PR_2;
 345
 346         if (intel_hdmi->rgb_quant_range_selectable) {
 347                 if (intel_crtc->config.limited_color_range)
 348                         avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_LIMITED;
 349                 else
 350                         avi_if.body.avi.ITC_EC_Q_SC |= DIP_AVI_RGB_QUANT_RANGE_FULL;
 351         }
 352
 353         avi_if.body.avi.VIC = drm_match_cea_mode(adjusted_mode);
 354
 355         intel_set_infoframe(encoder, &avi_if);
 356 }
 357
 358 static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
 359 {
 360         struct dip_infoframe spd_if;
 361
 362         memset(&spd_if, 0, sizeof(spd_if));
 363         spd_if.type = DIP_TYPE_SPD;
 364         spd_if.ver = DIP_VERSION_SPD;
 365         spd_if.len = DIP_LEN_SPD;
 366         strcpy(spd_if.body.spd.vn, "Intel");
 367         strcpy(spd_if.body.spd.pd, "Integrated gfx");
 368         spd_if.body.spd.sdi = DIP_SPD_PC;
 369
 370         intel_set_infoframe(encoder, &spd_if);
 371 }
 372
 373 static void g4x_set_infoframes(struct drm_encoder *encoder,
 374                                struct drm_display_mode *adjusted_mode)
 375 {
 376         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 377         struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
 378         struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
 379         u32 reg = VIDEO_DIP_CTL;
 380         u32 val = I915_READ(reg);
 381         u32 port;
 382
 383         assert_hdmi_port_disabled(intel_hdmi);
 384
 385         /* If the registers were not initialized yet, they might be zeroes,
 386          * which means we're selecting the AVI DIP and we're setting its
 387          * frequency to once. This seems to really confuse the HW and make
 388          * things stop working (the register spec says the AVI always needs to
 389          * be sent every VSync). So here we avoid writing to the register more
 390          * than we need and also explicitly select the AVI DIP and explicitly
 391          * set its frequency to every VSync. Avoiding to write it twice seems to
 392          * be enough to solve the problem, but being defensive shouldn't hurt us
 393          * either. */
 394         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 395
 396         if (!intel_hdmi->has_hdmi_sink) {
 397                 if (!(val & VIDEO_DIP_ENABLE))
 398                         return;
 399                 val &= ~VIDEO_DIP_ENABLE;
 400                 I915_WRITE(reg, val);
 401                 POSTING_READ(reg);
 402                 return;
 403         }
 404
 405         switch (intel_dig_port->port) {
 406         case PORT_B:
 407                 port = VIDEO_DIP_PORT_B;
 408                 break;
 409         case PORT_C:
 410                 port = VIDEO_DIP_PORT_C;
 411                 break;
 412         default:
 413                 BUG();
 414                 return;
 415         }
 416
 417         if (port != (val & VIDEO_DIP_PORT_MASK)) {
 418                 if (val & VIDEO_DIP_ENABLE) {
 419                         val &= ~VIDEO_DIP_ENABLE;
 420                         I915_WRITE(reg, val);
 421                         POSTING_READ(reg);
 422                 }
 423                 val &= ~VIDEO_DIP_PORT_MASK;
 424                 val |= port;
 425         }
 426
 427         val |= VIDEO_DIP_ENABLE;
 428         val &= ~VIDEO_DIP_ENABLE_VENDOR;
 429
 430         I915_WRITE(reg, val);
 431         POSTING_READ(reg);
 432
 433         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 434         intel_hdmi_set_spd_infoframe(encoder);
 435 }
 436
 437 static void ibx_set_infoframes(struct drm_encoder *encoder,
 438                                struct drm_display_mode *adjusted_mode)
 439 {
 440         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 441         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 442         struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
 443         struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
 444         u32 reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 445         u32 val = I915_READ(reg);
 446         u32 port;
 447
 448         assert_hdmi_port_disabled(intel_hdmi);
 449
 450         /* See the big comment in g4x_set_infoframes() */
 451         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 452
 453         if (!intel_hdmi->has_hdmi_sink) {
 454                 if (!(val & VIDEO_DIP_ENABLE))
 455                         return;
 456                 val &= ~VIDEO_DIP_ENABLE;
 457                 I915_WRITE(reg, val);
 458                 POSTING_READ(reg);
 459                 return;
 460         }
 461
 462         switch (intel_dig_port->port) {
 463         case PORT_B:
 464                 port = VIDEO_DIP_PORT_B;
 465                 break;
 466         case PORT_C:
 467                 port = VIDEO_DIP_PORT_C;
 468                 break;
 469         case PORT_D:
 470                 port = VIDEO_DIP_PORT_D;
 471                 break;
 472         default:
 473                 BUG();
 474                 return;
 475         }
 476
 477         if (port != (val & VIDEO_DIP_PORT_MASK)) {
 478                 if (val & VIDEO_DIP_ENABLE) {
 479                         val &= ~VIDEO_DIP_ENABLE;
 480                         I915_WRITE(reg, val);
 481                         POSTING_READ(reg);
 482                 }
 483                 val &= ~VIDEO_DIP_PORT_MASK;
 484                 val |= port;
 485         }
 486
 487         val |= VIDEO_DIP_ENABLE;
 488         val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 489                  VIDEO_DIP_ENABLE_GCP);
 490
 491         I915_WRITE(reg, val);
 492         POSTING_READ(reg);
 493
 494         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 495         intel_hdmi_set_spd_infoframe(encoder);
 496 }
 497
 498 static void cpt_set_infoframes(struct drm_encoder *encoder,
 499                                struct drm_display_mode *adjusted_mode)
 500 {
 501         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 502         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 503         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 504         u32 reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 505         u32 val = I915_READ(reg);
 506
 507         assert_hdmi_port_disabled(intel_hdmi);
 508
 509         /* See the big comment in g4x_set_infoframes() */
 510         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 511
 512         if (!intel_hdmi->has_hdmi_sink) {
 513                 if (!(val & VIDEO_DIP_ENABLE))
 514                         return;
 515                 val &= ~(VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI);
 516                 I915_WRITE(reg, val);
 517                 POSTING_READ(reg);
 518                 return;
 519         }
 520
 521         /* Set both together, unset both together: see the spec. */
 522         val |= VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI;
 523         val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 524                  VIDEO_DIP_ENABLE_GCP);
 525
 526         I915_WRITE(reg, val);
 527         POSTING_READ(reg);
 528
 529         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 530         intel_hdmi_set_spd_infoframe(encoder);
 531 }
 532
 533 static void vlv_set_infoframes(struct drm_encoder *encoder,
 534                                struct drm_display_mode *adjusted_mode)
 535 {
 536         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 537         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 538         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 539         u32 reg = VLV_TVIDEO_DIP_CTL(intel_crtc->pipe);
 540         u32 val = I915_READ(reg);
 541
 542         assert_hdmi_port_disabled(intel_hdmi);
 543
 544         /* See the big comment in g4x_set_infoframes() */
 545         val |= VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC;
 546
 547         if (!intel_hdmi->has_hdmi_sink) {
 548                 if (!(val & VIDEO_DIP_ENABLE))
 549                         return;
 550                 val &= ~VIDEO_DIP_ENABLE;
 551                 I915_WRITE(reg, val);
 552                 POSTING_READ(reg);
 553                 return;
 554         }
 555
 556         val |= VIDEO_DIP_ENABLE;
 557         val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
 558                  VIDEO_DIP_ENABLE_GCP);
 559
 560         I915_WRITE(reg, val);
 561         POSTING_READ(reg);
 562
 563         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 564         intel_hdmi_set_spd_infoframe(encoder);
 565 }
 566
 567 static void hsw_set_infoframes(struct drm_encoder *encoder,
 568                                struct drm_display_mode *adjusted_mode)
 569 {
 570         struct drm_i915_private *dev_priv = encoder->dev->dev_private;
 571         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 572         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 573         u32 reg = HSW_TVIDEO_DIP_CTL(intel_crtc->cpu_transcoder);
 574         u32 val = I915_READ(reg);
 575
 576         assert_hdmi_port_disabled(intel_hdmi);
 577
 578         if (!intel_hdmi->has_hdmi_sink) {
 579                 I915_WRITE(reg, 0);
 580                 POSTING_READ(reg);
 581                 return;
 582         }
 583
 584         val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_GCP_HSW |
 585                  VIDEO_DIP_ENABLE_VS_HSW | VIDEO_DIP_ENABLE_GMP_HSW);
 586
 587         I915_WRITE(reg, val);
 588         POSTING_READ(reg);
 589
 590         intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 591         intel_hdmi_set_spd_infoframe(encoder);
 592 }
 593
 594 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 595                                 struct drm_display_mode *mode,
 596                                 struct drm_display_mode *adjusted_mode)
 597 {
 598         struct drm_device *dev = encoder->dev;
 599         struct drm_i915_private *dev_priv = dev->dev_private;
 600         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 601         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 602         u32 hdmi_val;
 603
 604         hdmi_val = SDVO_ENCODING_HDMI;
 605         if (!HAS_PCH_SPLIT(dev))
 606                 hdmi_val |= intel_hdmi->color_range;
 607         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 608                 hdmi_val |= SDVO_VSYNC_ACTIVE_HIGH;
 609         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 610                 hdmi_val |= SDVO_HSYNC_ACTIVE_HIGH;
 611
 612         if (intel_crtc->config.pipe_bpp > 24)
 613                 hdmi_val |= HDMI_COLOR_FORMAT_12bpc;
 614         else
 615                 hdmi_val |= SDVO_COLOR_FORMAT_8bpc;
 616
 617         /* Required on CPT */
 618         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 619                 hdmi_val |= HDMI_MODE_SELECT_HDMI;
 620
 621         if (intel_hdmi->has_audio) {
 622                 DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n",
 623                                  pipe_name(intel_crtc->pipe));
 624                 hdmi_val |= SDVO_AUDIO_ENABLE;
 625                 hdmi_val |= HDMI_MODE_SELECT_HDMI;
 626                 intel_write_eld(encoder, adjusted_mode);
 627         }
 628
 629         if (HAS_PCH_CPT(dev))
 630                 hdmi_val |= SDVO_PIPE_SEL_CPT(intel_crtc->pipe);
 631         else
 632                 hdmi_val |= SDVO_PIPE_SEL(intel_crtc->pipe);
 633
 634         I915_WRITE(intel_hdmi->hdmi_reg, hdmi_val);
 635         POSTING_READ(intel_hdmi->hdmi_reg);
 636
 637         intel_hdmi->set_infoframes(encoder, adjusted_mode);
 638 }
 639
 640 static bool intel_hdmi_get_hw_state(struct intel_encoder *encoder,
 641                                     enum pipe *pipe)
 642 {
 643         struct drm_device *dev = encoder->base.dev;
 644         struct drm_i915_private *dev_priv = dev->dev_private;
 645         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
 646         u32 tmp;
 647
 648         tmp = I915_READ(intel_hdmi->hdmi_reg);
 649
 650         if (!(tmp & SDVO_ENABLE))
 651                 return false;
 652
 653         if (HAS_PCH_CPT(dev))
 654                 *pipe = PORT_TO_PIPE_CPT(tmp);
 655         else
 656                 *pipe = PORT_TO_PIPE(tmp);
 657
 658         return true;
 659 }
 660
 661 static void intel_enable_hdmi(struct intel_encoder *encoder)
 662 {
 663         struct drm_device *dev = encoder->base.dev;
 664         struct drm_i915_private *dev_priv = dev->dev_private;
 665         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
 666         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
 667         u32 temp;
 668         u32 enable_bits = SDVO_ENABLE;
 669
 670         if (intel_hdmi->has_audio)
 671                 enable_bits |= SDVO_AUDIO_ENABLE;
 672
 673         temp = I915_READ(intel_hdmi->hdmi_reg);
 674
 675         /* HW workaround for IBX, we need to move the port to transcoder A
 676          * before disabling it, so restore the transcoder select bit here. */
 677         if (HAS_PCH_IBX(dev))
 678                 enable_bits |= SDVO_PIPE_SEL(intel_crtc->pipe);
 679
 680         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 681          * we do this anyway which shows more stable in testing.
 682          */
 683         if (HAS_PCH_SPLIT(dev)) {
 684                 I915_WRITE(intel_hdmi->hdmi_reg, temp & ~SDVO_ENABLE);
 685                 POSTING_READ(intel_hdmi->hdmi_reg);
 686         }
 687
 688         temp |= enable_bits;
 689
 690         I915_WRITE(intel_hdmi->hdmi_reg, temp);
 691         POSTING_READ(intel_hdmi->hdmi_reg);
 692
 693         /* HW workaround, need to write this twice for issue that may result
 694          * in first write getting masked.
 695          */
 696         if (HAS_PCH_SPLIT(dev)) {
 697                 I915_WRITE(intel_hdmi->hdmi_reg, temp);
 698                 POSTING_READ(intel_hdmi->hdmi_reg);
 699         }
 700 }
 701
 702 static void intel_disable_hdmi(struct intel_encoder *encoder)
 703 {
 704         struct drm_device *dev = encoder->base.dev;
 705         struct drm_i915_private *dev_priv = dev->dev_private;
 706         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
 707         u32 temp;
 708         u32 enable_bits = SDVO_ENABLE | SDVO_AUDIO_ENABLE;
 709
 710         temp = I915_READ(intel_hdmi->hdmi_reg);
 711
 712         /* HW workaround for IBX, we need to move the port to transcoder A
 713          * before disabling it. */
 714         if (HAS_PCH_IBX(dev)) {
 715                 struct drm_crtc *crtc = encoder->base.crtc;
 716                 int pipe = crtc ? to_intel_crtc(crtc)->pipe : -1;
 717
 718                 if (temp & SDVO_PIPE_B_SELECT) {
 719                         temp &= ~SDVO_PIPE_B_SELECT;
 720                         I915_WRITE(intel_hdmi->hdmi_reg, temp);
 721                         POSTING_READ(intel_hdmi->hdmi_reg);
 722
 723                         /* Again we need to write this twice. */
 724                         I915_WRITE(intel_hdmi->hdmi_reg, temp);
 725                         POSTING_READ(intel_hdmi->hdmi_reg);
 726
 727                         /* Transcoder selection bits only update
 728                          * effectively on vblank. */
 729                         if (crtc)
 730                                 intel_wait_for_vblank(dev, pipe);
 731                         else
 732                                 msleep(50);
 733                 }
 734         }
 735
 736         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 737          * we do this anyway which shows more stable in testing.
 738          */
 739         if (HAS_PCH_SPLIT(dev)) {
 740                 I915_WRITE(intel_hdmi->hdmi_reg, temp & ~SDVO_ENABLE);
 741                 POSTING_READ(intel_hdmi->hdmi_reg);
 742         }
 743
 744         temp &= ~enable_bits;
 745
 746         I915_WRITE(intel_hdmi->hdmi_reg, temp);
 747         POSTING_READ(intel_hdmi->hdmi_reg);
 748
 749         /* HW workaround, need to write this twice for issue that may result
 750          * in first write getting masked.
 751          */
 752         if (HAS_PCH_SPLIT(dev)) {
 753                 I915_WRITE(intel_hdmi->hdmi_reg, temp);
 754                 POSTING_READ(intel_hdmi->hdmi_reg);
 755         }
 756 }
 757
 758 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 759                                  struct drm_display_mode *mode)
 760 {
 761         if (mode->clock > 165000)
 762                 return MODE_CLOCK_HIGH;
 763         if (mode->clock < 20000)
 764                 return MODE_CLOCK_LOW;
 765
 766         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 767                 return MODE_NO_DBLESCAN;
 768
 769         return MODE_OK;
 770 }
 771
 772 bool intel_hdmi_compute_config(struct intel_encoder *encoder,
 773                                struct intel_crtc_config *pipe_config)
 774 {
 775         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
 776         struct drm_device *dev = encoder->base.dev;
 777         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
 778
 779         if (intel_hdmi->color_range_auto) {
 780                 /* See CEA-861-E - 5.1 Default Encoding Parameters */
 781                 if (intel_hdmi->has_hdmi_sink &&
 782                     drm_match_cea_mode(adjusted_mode) > 1)
 783                         intel_hdmi->color_range = HDMI_COLOR_RANGE_16_235;
 784                 else
 785                         intel_hdmi->color_range = 0;
 786         }
 787
 788         if (intel_hdmi->color_range)
 789                 pipe_config->limited_color_range = true;
 790
 791         if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev))
 792                 pipe_config->has_pch_encoder = true;
 793
 794         return true;
 795 }
 796
 797 static enum drm_connector_status
 798 intel_hdmi_detect(struct drm_connector *connector, bool force)
 799 {
 800         struct drm_device *dev = connector->dev;
 801         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 802         struct intel_digital_port *intel_dig_port =
 803                 hdmi_to_dig_port(intel_hdmi);
 804         struct intel_encoder *intel_encoder = &intel_dig_port->base;
 805         struct drm_i915_private *dev_priv = dev->dev_private;
 806         struct edid *edid;
 807         enum drm_connector_status status = connector_status_disconnected;
 808
 809         intel_hdmi->has_hdmi_sink = false;
 810         intel_hdmi->has_audio = false;
 811         intel_hdmi->rgb_quant_range_selectable = false;
 812         edid = drm_get_edid(connector,
 813                             intel_gmbus_get_adapter(dev_priv,
 814                                                     intel_hdmi->ddc_bus));
 815
 816         if (edid) {
 817                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 818                         status = connector_status_connected;
 819                         if (intel_hdmi->force_audio != HDMI_AUDIO_OFF_DVI)
 820                                 intel_hdmi->has_hdmi_sink =
 821                                                 drm_detect_hdmi_monitor(edid);
 822                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 823                         intel_hdmi->rgb_quant_range_selectable =
 824                                 drm_rgb_quant_range_selectable(edid);
 825                 }
 826                 kfree(edid);
 827         }
 828
 829         if (status == connector_status_connected) {
 830                 if (intel_hdmi->force_audio != HDMI_AUDIO_AUTO)
 831                         intel_hdmi->has_audio =
 832                                 (intel_hdmi->force_audio == HDMI_AUDIO_ON);
 833                 intel_encoder->type = INTEL_OUTPUT_HDMI;
 834         }
 835
 836         return status;
 837 }
 838
 839 static int intel_hdmi_get_modes(struct drm_connector *connector)
 840 {
 841         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 842         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 843
 844         /* We should parse the EDID data and find out if it's an HDMI sink so
 845          * we can send audio to it.
 846          */
 847
 848         return intel_ddc_get_modes(connector,
 849                                    intel_gmbus_get_adapter(dev_priv,
 850                                                            intel_hdmi->ddc_bus));
 851 }
 852
 853 static bool
 854 intel_hdmi_detect_audio(struct drm_connector *connector)
 855 {
 856         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 857         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 858         struct edid *edid;
 859         bool has_audio = false;
 860
 861         edid = drm_get_edid(connector,
 862                             intel_gmbus_get_adapter(dev_priv,
 863                                                     intel_hdmi->ddc_bus));
 864         if (edid) {
 865                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
 866                         has_audio = drm_detect_monitor_audio(edid);
 867                 kfree(edid);
 868         }
 869
 870         return has_audio;
 871 }
 872
 873 static int
 874 intel_hdmi_set_property(struct drm_connector *connector,
 875                         struct drm_property *property,
 876                         uint64_t val)
 877 {
 878         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 879         struct intel_digital_port *intel_dig_port =
 880                 hdmi_to_dig_port(intel_hdmi);
 881         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 882         int ret;
 883
 884         ret = drm_object_property_set_value(&connector->base, property, val);
 885         if (ret)
 886                 return ret;
 887
 888         if (property == dev_priv->force_audio_property) {
 889                 enum hdmi_force_audio i = val;
 890                 bool has_audio;
 891
 892                 if (i == intel_hdmi->force_audio)
 893                         return 0;
 894
 895                 intel_hdmi->force_audio = i;
 896
 897                 if (i == HDMI_AUDIO_AUTO)
 898                         has_audio = intel_hdmi_detect_audio(connector);
 899                 else
 900                         has_audio = (i == HDMI_AUDIO_ON);
 901
 902                 if (i == HDMI_AUDIO_OFF_DVI)
 903                         intel_hdmi->has_hdmi_sink = 0;
 904
 905                 intel_hdmi->has_audio = has_audio;
 906                 goto done;
 907         }
 908
 909         if (property == dev_priv->broadcast_rgb_property) {
 910                 switch (val) {
 911                 case INTEL_BROADCAST_RGB_AUTO:
 912                         intel_hdmi->color_range_auto = true;
 913                         break;
 914                 case INTEL_BROADCAST_RGB_FULL:
 915                         intel_hdmi->color_range_auto = false;
 916                         intel_hdmi->color_range = 0;
 917                         break;
 918                 case INTEL_BROADCAST_RGB_LIMITED:
 919                         intel_hdmi->color_range_auto = false;
 920                         intel_hdmi->color_range = HDMI_COLOR_RANGE_16_235;
 921                         break;
 922                 default:
 923                         return -EINVAL;
 924                 }
 925                 goto done;
 926         }
 927
 928         return -EINVAL;
 929
 930 done:
 931         if (intel_dig_port->base.base.crtc)
 932                 intel_crtc_restore_mode(intel_dig_port->base.base.crtc);
 933
 934         return 0;
 935 }
 936
 937 static void intel_hdmi_destroy(struct drm_connector *connector)
 938 {
 939         drm_sysfs_connector_remove(connector);
 940         drm_connector_cleanup(connector);
 941         kfree(connector);
 942 }
 943
 944 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 945         .mode_set = intel_hdmi_mode_set,
 946 };
 947
 948 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 949         .dpms = intel_connector_dpms,
 950         .detect = intel_hdmi_detect,
 951         .fill_modes = drm_helper_probe_single_connector_modes,
 952         .set_property = intel_hdmi_set_property,
 953         .destroy = intel_hdmi_destroy,
 954 };
 955
 956 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 957         .get_modes = intel_hdmi_get_modes,
 958         .mode_valid = intel_hdmi_mode_valid,
 959         .best_encoder = intel_best_encoder,
 960 };
 961
 962 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 963         .destroy = intel_encoder_destroy,
 964 };
 965
 966 static void
 967 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 968 {
 969         intel_attach_force_audio_property(connector);
 970         intel_attach_broadcast_rgb_property(connector);
 971         intel_hdmi->color_range_auto = true;
 972 }
 973
 974 void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 975                                struct intel_connector *intel_connector)
 976 {
 977         struct drm_connector *connector = &intel_connector->base;
 978         struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
 979         struct intel_encoder *intel_encoder = &intel_dig_port->base;
 980         struct drm_device *dev = intel_encoder->base.dev;
 981         struct drm_i915_private *dev_priv = dev->dev_private;
 982         enum port port = intel_dig_port->port;
 983
 984         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 985                            DRM_MODE_CONNECTOR_HDMIA);
 986         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 987
 988         connector->polled = DRM_CONNECTOR_POLL_HPD;
 989         connector->interlace_allowed = 1;
 990         connector->doublescan_allowed = 0;
 991
 992         switch (port) {
 993         case PORT_B:
 994                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 995                 intel_encoder->hpd_pin = HPD_PORT_B;
 996                 break;
 997         case PORT_C:
 998                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 999                 intel_encoder->hpd_pin = HPD_PORT_C;
1000                 break;
1001         case PORT_D:
1002                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
1003                 intel_encoder->hpd_pin = HPD_PORT_D;
1004                 break;
1005         case PORT_A:
1006                 intel_encoder->hpd_pin = HPD_PORT_A;
1007                 /* Internal port only for eDP. */
1008         default:
1009                 BUG();
1010         }
1011
1012         if (IS_VALLEYVIEW(dev)) {
1013                 intel_hdmi->write_infoframe = vlv_write_infoframe;
1014                 intel_hdmi->set_infoframes = vlv_set_infoframes;
1015         } else if (!HAS_PCH_SPLIT(dev)) {
1016                 intel_hdmi->write_infoframe = g4x_write_infoframe;
1017                 intel_hdmi->set_infoframes = g4x_set_infoframes;
1018         } else if (HAS_DDI(dev)) {
1019                 intel_hdmi->write_infoframe = hsw_write_infoframe;
1020                 intel_hdmi->set_infoframes = hsw_set_infoframes;
1021         } else if (HAS_PCH_IBX(dev)) {
1022                 intel_hdmi->write_infoframe = ibx_write_infoframe;
1023                 intel_hdmi->set_infoframes = ibx_set_infoframes;
1024         } else {
1025                 intel_hdmi->write_infoframe = cpt_write_infoframe;
1026                 intel_hdmi->set_infoframes = cpt_set_infoframes;
1027         }
1028
1029         if (HAS_DDI(dev))
1030                 intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
1031         else
1032                 intel_connector->get_hw_state = intel_connector_get_hw_state;
1033
1034         intel_hdmi_add_properties(intel_hdmi, connector);
1035
1036         intel_connector_attach_encoder(intel_connector, intel_encoder);
1037         drm_sysfs_connector_add(connector);
1038
1039         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
1040          * 0xd.  Failure to do so will result in spurious interrupts being
1041          * generated on the port when a cable is not attached.
1042          */
1043         if (IS_G4X(dev) && !IS_GM45(dev)) {
1044                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
1045                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
1046         }
1047 }
1048
1049 void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
1050 {
1051         struct intel_digital_port *intel_dig_port;
1052         struct intel_encoder *intel_encoder;
1053         struct drm_encoder *encoder;
1054         struct intel_connector *intel_connector;
1055
1056         intel_dig_port = kzalloc(sizeof(struct intel_digital_port), GFP_KERNEL);
1057         if (!intel_dig_port)
1058                 return;
1059
1060         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
1061         if (!intel_connector) {
1062                 kfree(intel_dig_port);
1063                 return;
1064         }
1065
1066         intel_encoder = &intel_dig_port->base;
1067         encoder = &intel_encoder->base;
1068
1069         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
1070                          DRM_MODE_ENCODER_TMDS);
1071         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
1072
1073         intel_encoder->compute_config = intel_hdmi_compute_config;
1074         intel_encoder->enable = intel_enable_hdmi;
1075         intel_encoder->disable = intel_disable_hdmi;
1076         intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
1077
1078         intel_encoder->type = INTEL_OUTPUT_HDMI;
1079         intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
1080         intel_encoder->cloneable = false;
1081
1082         intel_dig_port->port = port;
1083         intel_dig_port->hdmi.hdmi_reg = hdmi_reg;
1084         intel_dig_port->dp.output_reg = 0;
1085
1086         intel_hdmi_init_connector(intel_dig_port, intel_connector);
1087 }