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 struct intel_hdmi {
  41         struct intel_encoder base;
  42         u32 sdvox_reg;
  43         int ddc_bus;
  44         uint32_t color_range;
  45         bool has_hdmi_sink;
  46         bool has_audio;
  47         int force_audio;
  48         void (*write_infoframe)(struct drm_encoder *encoder,
  49                                 struct dip_infoframe *frame);
  50 };
  51
  52 static 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         /* Header isn't part of the checksum */
  73         for (i = 5; i < frame->len; i++)
  74                 sum += data[i];
  75
  76         frame->checksum = 0x100 - sum;
  77 }
  78
  79 static u32 intel_infoframe_index(struct dip_infoframe *frame)
  80 {
  81         u32 flags = 0;
  82
  83         switch (frame->type) {
  84         case DIP_TYPE_AVI:
  85                 flags |= VIDEO_DIP_SELECT_AVI;
  86                 break;
  87         case DIP_TYPE_SPD:
  88                 flags |= VIDEO_DIP_SELECT_SPD;
  89                 break;
  90         default:
  91                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
  92                 break;
  93         }
  94
  95         return flags;
  96 }
  97
  98 static u32 intel_infoframe_flags(struct dip_infoframe *frame)
  99 {
 100         u32 flags = 0;
 101
 102         switch (frame->type) {
 103         case DIP_TYPE_AVI:
 104                 flags |= VIDEO_DIP_ENABLE_AVI | VIDEO_DIP_FREQ_VSYNC;
 105                 break;
 106         case DIP_TYPE_SPD:
 107                 flags |= VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_FREQ_2VSYNC;
 108                 break;
 109         default:
 110                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
 111                 break;
 112         }
 113
 114         return flags;
 115 }
 116
 117 static void i9xx_write_infoframe(struct drm_encoder *encoder,
 118                                  struct dip_infoframe *frame)
 119 {
 120         uint32_t *data = (uint32_t *)frame;
 121         struct drm_device *dev = encoder->dev;
 122         struct drm_i915_private *dev_priv = dev->dev_private;
 123         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 124         u32 port, flags, val = I915_READ(VIDEO_DIP_CTL);
 125         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 126
 127
 128         /* XXX first guess at handling video port, is this corrent? */
 129         if (intel_hdmi->sdvox_reg == SDVOB)
 130                 port = VIDEO_DIP_PORT_B;
 131         else if (intel_hdmi->sdvox_reg == SDVOC)
 132                 port = VIDEO_DIP_PORT_C;
 133         else
 134                 return;
 135
 136         flags = intel_infoframe_index(frame);
 137
 138         val &= ~VIDEO_DIP_SELECT_MASK;
 139
 140         I915_WRITE(VIDEO_DIP_CTL, val | port | flags);
 141
 142         for (i = 0; i < len; i += 4) {
 143                 I915_WRITE(VIDEO_DIP_DATA, *data);
 144                 data++;
 145         }
 146
 147         flags |= intel_infoframe_flags(frame);
 148
 149         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
 150 }
 151
 152 static void ironlake_write_infoframe(struct drm_encoder *encoder,
 153                                      struct dip_infoframe *frame)
 154 {
 155         uint32_t *data = (uint32_t *)frame;
 156         struct drm_device *dev = encoder->dev;
 157         struct drm_i915_private *dev_priv = dev->dev_private;
 158         struct drm_crtc *crtc = encoder->crtc;
 159         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 160         int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
 161         unsigned i, len = DIP_HEADER_SIZE + frame->len;
 162         u32 flags, val = I915_READ(reg);
 163
 164         intel_wait_for_vblank(dev, intel_crtc->pipe);
 165
 166         flags = intel_infoframe_index(frame);
 167
 168         val &= ~VIDEO_DIP_SELECT_MASK;
 169
 170         I915_WRITE(reg, val | flags);
 171
 172         for (i = 0; i < len; i += 4) {
 173                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
 174                 data++;
 175         }
 176
 177         flags |= intel_infoframe_flags(frame);
 178
 179         I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
 180 }
 181 static void intel_set_infoframe(struct drm_encoder *encoder,
 182                                 struct dip_infoframe *frame)
 183 {
 184         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 185
 186         if (!intel_hdmi->has_hdmi_sink)
 187                 return;
 188
 189         intel_dip_infoframe_csum(frame);
 190         intel_hdmi->write_infoframe(encoder, frame);
 191 }
 192
 193 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 194 {
 195         struct dip_infoframe avi_if = {
 196                 .type = DIP_TYPE_AVI,
 197                 .ver = DIP_VERSION_AVI,
 198                 .len = DIP_LEN_AVI,
 199         };
 200
 201         intel_set_infoframe(encoder, &avi_if);
 202 }
 203
 204 static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
 205 {
 206         struct dip_infoframe spd_if;
 207
 208         memset(&spd_if, 0, sizeof(spd_if));
 209         spd_if.type = DIP_TYPE_SPD;
 210         spd_if.ver = DIP_VERSION_SPD;
 211         spd_if.len = DIP_LEN_SPD;
 212         strcpy(spd_if.body.spd.vn, "Intel");
 213         strcpy(spd_if.body.spd.pd, "Integrated gfx");
 214         spd_if.body.spd.sdi = DIP_SPD_PC;
 215
 216         intel_set_infoframe(encoder, &spd_if);
 217 }
 218
 219 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 220                                 struct drm_display_mode *mode,
 221                                 struct drm_display_mode *adjusted_mode)
 222 {
 223         struct drm_device *dev = encoder->dev;
 224         struct drm_i915_private *dev_priv = dev->dev_private;
 225         struct drm_crtc *crtc = encoder->crtc;
 226         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 227         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 228         u32 sdvox;
 229
 230         sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
 231         if (!HAS_PCH_SPLIT(dev))
 232                 sdvox |= intel_hdmi->color_range;
 233         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 234                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
 235         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 236                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
 237
 238         if (intel_crtc->bpp > 24)
 239                 sdvox |= COLOR_FORMAT_12bpc;
 240         else
 241                 sdvox |= COLOR_FORMAT_8bpc;
 242
 243         /* Required on CPT */
 244         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 245                 sdvox |= HDMI_MODE_SELECT;
 246
 247         if (intel_hdmi->has_audio) {
 248                 DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n",
 249                                  pipe_name(intel_crtc->pipe));
 250                 sdvox |= SDVO_AUDIO_ENABLE;
 251                 sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
 252                 intel_write_eld(encoder, adjusted_mode);
 253         }
 254
 255         if (HAS_PCH_CPT(dev))
 256                 sdvox |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
 257         else if (intel_crtc->pipe == 1)
 258                 sdvox |= SDVO_PIPE_B_SELECT;
 259
 260         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 261         POSTING_READ(intel_hdmi->sdvox_reg);
 262
 263         intel_hdmi_set_avi_infoframe(encoder);
 264         intel_hdmi_set_spd_infoframe(encoder);
 265 }
 266
 267 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 268 {
 269         struct drm_device *dev = encoder->dev;
 270         struct drm_i915_private *dev_priv = dev->dev_private;
 271         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 272         u32 temp;
 273
 274         temp = I915_READ(intel_hdmi->sdvox_reg);
 275
 276         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
 277          * we do this anyway which shows more stable in testing.
 278          */
 279         if (HAS_PCH_SPLIT(dev)) {
 280                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 281                 POSTING_READ(intel_hdmi->sdvox_reg);
 282         }
 283
 284         if (mode != DRM_MODE_DPMS_ON) {
 285                 temp &= ~SDVO_ENABLE;
 286         } else {
 287                 temp |= SDVO_ENABLE;
 288         }
 289
 290         I915_WRITE(intel_hdmi->sdvox_reg, temp);
 291         POSTING_READ(intel_hdmi->sdvox_reg);
 292
 293         /* HW workaround, need to write this twice for issue that may result
 294          * in first write getting masked.
 295          */
 296         if (HAS_PCH_SPLIT(dev)) {
 297                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
 298                 POSTING_READ(intel_hdmi->sdvox_reg);
 299         }
 300 }
 301
 302 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 303                                  struct drm_display_mode *mode)
 304 {
 305         if (mode->clock > 165000)
 306                 return MODE_CLOCK_HIGH;
 307         if (mode->clock < 20000)
 308                 return MODE_CLOCK_LOW;
 309
 310         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 311                 return MODE_NO_DBLESCAN;
 312
 313         return MODE_OK;
 314 }
 315
 316 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 317                                   struct drm_display_mode *mode,
 318                                   struct drm_display_mode *adjusted_mode)
 319 {
 320         return true;
 321 }
 322
 323 static enum drm_connector_status
 324 intel_hdmi_detect(struct drm_connector *connector, bool force)
 325 {
 326         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 327         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 328         struct edid *edid;
 329         enum drm_connector_status status = connector_status_disconnected;
 330
 331         intel_hdmi->has_hdmi_sink = false;
 332         intel_hdmi->has_audio = false;
 333         edid = drm_get_edid(connector,
 334                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 335
 336         if (edid) {
 337                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 338                         status = connector_status_connected;
 339                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 340                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 341                 }
 342                 connector->display_info.raw_edid = NULL;
 343                 kfree(edid);
 344         }
 345
 346         if (status == connector_status_connected) {
 347                 if (intel_hdmi->force_audio)
 348                         intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
 349         }
 350
 351         return status;
 352 }
 353
 354 static int intel_hdmi_get_modes(struct drm_connector *connector)
 355 {
 356         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 357         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 358
 359         /* We should parse the EDID data and find out if it's an HDMI sink so
 360          * we can send audio to it.
 361          */
 362
 363         return intel_ddc_get_modes(connector,
 364                                    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 365 }
 366
 367 static bool
 368 intel_hdmi_detect_audio(struct drm_connector *connector)
 369 {
 370         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 371         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 372         struct edid *edid;
 373         bool has_audio = false;
 374
 375         edid = drm_get_edid(connector,
 376                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 377         if (edid) {
 378                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
 379                         has_audio = drm_detect_monitor_audio(edid);
 380
 381                 connector->display_info.raw_edid = NULL;
 382                 kfree(edid);
 383         }
 384
 385         return has_audio;
 386 }
 387
 388 static int
 389 intel_hdmi_set_property(struct drm_connector *connector,
 390                       struct drm_property *property,
 391                       uint64_t val)
 392 {
 393         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 394         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 395         int ret;
 396
 397         ret = drm_connector_property_set_value(connector, property, val);
 398         if (ret)
 399                 return ret;
 400
 401         if (property == dev_priv->force_audio_property) {
 402                 int i = val;
 403                 bool has_audio;
 404
 405                 if (i == intel_hdmi->force_audio)
 406                         return 0;
 407
 408                 intel_hdmi->force_audio = i;
 409
 410                 if (i == 0)
 411                         has_audio = intel_hdmi_detect_audio(connector);
 412                 else
 413                         has_audio = i > 0;
 414
 415                 if (has_audio == intel_hdmi->has_audio)
 416                         return 0;
 417
 418                 intel_hdmi->has_audio = has_audio;
 419                 goto done;
 420         }
 421
 422         if (property == dev_priv->broadcast_rgb_property) {
 423                 if (val == !!intel_hdmi->color_range)
 424                         return 0;
 425
 426                 intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
 427                 goto done;
 428         }
 429
 430         return -EINVAL;
 431
 432 done:
 433         if (intel_hdmi->base.base.crtc) {
 434                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 435                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
 436                                          crtc->x, crtc->y,
 437                                          crtc->fb);
 438         }
 439
 440         return 0;
 441 }
 442
 443 static void intel_hdmi_destroy(struct drm_connector *connector)
 444 {
 445         drm_sysfs_connector_remove(connector);
 446         drm_connector_cleanup(connector);
 447         kfree(connector);
 448 }
 449
 450 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 451         .dpms = intel_hdmi_dpms,
 452         .mode_fixup = intel_hdmi_mode_fixup,
 453         .prepare = intel_encoder_prepare,
 454         .mode_set = intel_hdmi_mode_set,
 455         .commit = intel_encoder_commit,
 456 };
 457
 458 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 459         .dpms = drm_helper_connector_dpms,
 460         .detect = intel_hdmi_detect,
 461         .fill_modes = drm_helper_probe_single_connector_modes,
 462         .set_property = intel_hdmi_set_property,
 463         .destroy = intel_hdmi_destroy,
 464 };
 465
 466 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 467         .get_modes = intel_hdmi_get_modes,
 468         .mode_valid = intel_hdmi_mode_valid,
 469         .best_encoder = intel_best_encoder,
 470 };
 471
 472 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 473         .destroy = intel_encoder_destroy,
 474 };
 475
 476 static void
 477 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 478 {
 479         intel_attach_force_audio_property(connector);
 480         intel_attach_broadcast_rgb_property(connector);
 481 }
 482
 483 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 484 {
 485         struct drm_i915_private *dev_priv = dev->dev_private;
 486         struct drm_connector *connector;
 487         struct intel_encoder *intel_encoder;
 488         struct intel_connector *intel_connector;
 489         struct intel_hdmi *intel_hdmi;
 490
 491         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
 492         if (!intel_hdmi)
 493                 return;
 494
 495         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 496         if (!intel_connector) {
 497                 kfree(intel_hdmi);
 498                 return;
 499         }
 500
 501         intel_encoder = &intel_hdmi->base;
 502         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 503                          DRM_MODE_ENCODER_TMDS);
 504
 505         connector = &intel_connector->base;
 506         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 507                            DRM_MODE_CONNECTOR_HDMIA);
 508         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
 509
 510         intel_encoder->type = INTEL_OUTPUT_HDMI;
 511
 512         connector->polled = DRM_CONNECTOR_POLL_HPD;
 513         connector->interlace_allowed = 0;
 514         connector->doublescan_allowed = 0;
 515         intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 516
 517         /* Set up the DDC bus. */
 518         if (sdvox_reg == SDVOB) {
 519                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 520                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 521                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 522         } else if (sdvox_reg == SDVOC) {
 523                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 524                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 525                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 526         } else if (sdvox_reg == HDMIB) {
 527                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 528                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 529                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 530         } else if (sdvox_reg == HDMIC) {
 531                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 532                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 533                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 534         } else if (sdvox_reg == HDMID) {
 535                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 536                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 537                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 538         }
 539
 540         intel_hdmi->sdvox_reg = sdvox_reg;
 541
 542         if (!HAS_PCH_SPLIT(dev))
 543                 intel_hdmi->write_infoframe = i9xx_write_infoframe;
 544         else
 545                 intel_hdmi->write_infoframe = ironlake_write_infoframe;
 546
 547         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 548
 549         intel_hdmi_add_properties(intel_hdmi, connector);
 550
 551         intel_connector_attach_encoder(intel_connector, intel_encoder);
 552         drm_sysfs_connector_add(connector);
 553
 554         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 555          * 0xd.  Failure to do so will result in spurious interrupts being
 556          * generated on the port when a cable is not attached.
 557          */
 558         if (IS_G4X(dev) && !IS_GM45(dev)) {
 559                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 560                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 561         }
 562 }