drivers/gpu/drm/radeon/radeon_dp_mst.c

   1
   2 #include <drm/drmP.h>
   3 #include <drm/drm_dp_mst_helper.h>
   4 #include <drm/drm_fb_helper.h>
   5
   6 #include "radeon.h"
   7 #include "atom.h"
   8 #include "ni_reg.h"
   9
  10 static struct radeon_encoder *radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector);
  11
  12 static int radeon_atom_set_enc_offset(int id)
  13 {
  14         static const int offsets[] = { EVERGREEN_CRTC0_REGISTER_OFFSET,
  15                                        EVERGREEN_CRTC1_REGISTER_OFFSET,
  16                                        EVERGREEN_CRTC2_REGISTER_OFFSET,
  17                                        EVERGREEN_CRTC3_REGISTER_OFFSET,
  18                                        EVERGREEN_CRTC4_REGISTER_OFFSET,
  19                                        EVERGREEN_CRTC5_REGISTER_OFFSET,
  20                                        0x13830 - 0x7030 };
  21
  22         return offsets[id];
  23 }
  24
  25 static int radeon_dp_mst_set_be_cntl(struct radeon_encoder *primary,
  26                                      struct radeon_encoder_mst *mst_enc,
  27                                      enum radeon_hpd_id hpd, bool enable)
  28 {
  29         struct drm_device *dev = primary->base.dev;
  30         struct radeon_device *rdev = dev->dev_private;
  31         uint32_t reg;
  32         int retries = 0;
  33         uint32_t temp;
  34
  35         reg = RREG32(NI_DIG_BE_CNTL + primary->offset);
  36
  37         /* set MST mode */
  38         reg &= ~NI_DIG_FE_DIG_MODE(7);
  39         reg |= NI_DIG_FE_DIG_MODE(NI_DIG_MODE_DP_MST);
  40
  41         if (enable)
  42                 reg |= NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
  43         else
  44                 reg &= ~NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
  45
  46         reg |= NI_DIG_HPD_SELECT(hpd);
  47         DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DIG_BE_CNTL + primary->offset, reg);
  48         WREG32(NI_DIG_BE_CNTL + primary->offset, reg);
  49
  50         if (enable) {
  51                 uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
  52
  53                 do {
  54                         temp = RREG32(NI_DIG_FE_CNTL + offset);
  55                 } while ((temp & NI_DIG_SYMCLK_FE_ON) && retries++ < 10000);
  56                 if (retries == 10000)
  57                         DRM_ERROR("timed out waiting for FE %d %d\n", primary->offset, mst_enc->fe);
  58         }
  59         return 0;
  60 }
  61
  62 static int radeon_dp_mst_set_stream_attrib(struct radeon_encoder *primary,
  63                                            int stream_number,
  64                                            int fe,
  65                                            int slots)
  66 {
  67         struct drm_device *dev = primary->base.dev;
  68         struct radeon_device *rdev = dev->dev_private;
  69         u32 temp, val;
  70         int retries  = 0;
  71         int satreg, satidx;
  72
  73         satreg = stream_number >> 1;
  74         satidx = stream_number & 1;
  75
  76         temp = RREG32(NI_DP_MSE_SAT0 + satreg + primary->offset);
  77
  78         val = NI_DP_MSE_SAT_SLOT_COUNT0(slots) | NI_DP_MSE_SAT_SRC0(fe);
  79
  80         val <<= (16 * satidx);
  81
  82         temp &= ~(0xffff << (16 * satidx));
  83
  84         temp |= val;
  85
  86         DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
  87         WREG32(NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
  88
  89         WREG32(NI_DP_MSE_SAT_UPDATE + primary->offset, 1);
  90
  91         do {
  92                 temp = RREG32(NI_DP_MSE_SAT_UPDATE + primary->offset);
  93         } while ((temp & 0x1) && retries++ < 10000);
  94
  95         if (retries == 10000)
  96                 DRM_ERROR("timed out waitin for SAT update %d\n", primary->offset);
  97
  98         /* MTP 16 ? */
  99         return 0;
 100 }
 101
 102 static int radeon_dp_mst_update_stream_attribs(struct radeon_connector *mst_conn,
 103                                                struct radeon_encoder *primary)
 104 {
 105         struct drm_device *dev = mst_conn->base.dev;
 106         struct stream_attribs new_attribs[6];
 107         int i;
 108         int idx = 0;
 109         struct radeon_connector *radeon_connector;
 110         struct drm_connector *connector;
 111
 112         memset(new_attribs, 0, sizeof(new_attribs));
 113         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 114                 struct radeon_encoder *subenc;
 115                 struct radeon_encoder_mst *mst_enc;
 116
 117                 radeon_connector = to_radeon_connector(connector);
 118                 if (!radeon_connector->is_mst_connector)
 119                         continue;
 120
 121                 if (radeon_connector->mst_port != mst_conn)
 122                         continue;
 123
 124                 subenc = radeon_connector->mst_encoder;
 125                 mst_enc = subenc->enc_priv;
 126
 127                 if (!mst_enc->enc_active)
 128                         continue;
 129
 130                 new_attribs[idx].fe = mst_enc->fe;
 131                 new_attribs[idx].slots = drm_dp_mst_get_vcpi_slots(&mst_conn->mst_mgr, mst_enc->port);
 132                 idx++;
 133         }
 134
 135         for (i = 0; i < idx; i++) {
 136                 if (new_attribs[i].fe != mst_conn->cur_stream_attribs[i].fe ||
 137                     new_attribs[i].slots != mst_conn->cur_stream_attribs[i].slots) {
 138                         radeon_dp_mst_set_stream_attrib(primary, i, new_attribs[i].fe, new_attribs[i].slots);
 139                         mst_conn->cur_stream_attribs[i].fe = new_attribs[i].fe;
 140                         mst_conn->cur_stream_attribs[i].slots = new_attribs[i].slots;
 141                 }
 142         }
 143
 144         for (i = idx; i < mst_conn->enabled_attribs; i++) {
 145                 radeon_dp_mst_set_stream_attrib(primary, i, 0, 0);
 146                 mst_conn->cur_stream_attribs[i].fe = 0;
 147                 mst_conn->cur_stream_attribs[i].slots = 0;
 148         }
 149         mst_conn->enabled_attribs = idx;
 150         return 0;
 151 }
 152
 153 static int radeon_dp_mst_set_vcp_size(struct radeon_encoder *mst, uint32_t x, uint32_t y)
 154 {
 155         struct drm_device *dev = mst->base.dev;
 156         struct radeon_device *rdev = dev->dev_private;
 157         struct radeon_encoder_mst *mst_enc = mst->enc_priv;
 158         uint32_t val, temp;
 159         uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
 160         int retries = 0;
 161
 162         val = NI_DP_MSE_RATE_X(x) | NI_DP_MSE_RATE_Y(y);
 163
 164         WREG32(NI_DP_MSE_RATE_CNTL + offset, val);
 165
 166         do {
 167                 temp = RREG32(NI_DP_MSE_RATE_UPDATE + offset);
 168         } while ((temp & 0x1) && (retries++ < 10000));
 169
 170         if (retries >= 10000)
 171                 DRM_ERROR("timed out wait for rate cntl %d\n", mst_enc->fe);
 172         return 0;
 173 }
 174
 175 static int radeon_dp_mst_get_ddc_modes(struct drm_connector *connector)
 176 {
 177         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 178         struct radeon_connector *master = radeon_connector->mst_port;
 179         struct edid *edid;
 180         int ret = 0;
 181
 182         edid = drm_dp_mst_get_edid(connector, &master->mst_mgr, radeon_connector->port);
 183         radeon_connector->edid = edid;
 184         DRM_DEBUG_KMS("edid retrieved %p\n", edid);
 185         if (radeon_connector->edid) {
 186                 drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
 187                 ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
 188                 drm_edid_to_eld(&radeon_connector->base, radeon_connector->edid);
 189                 return ret;
 190         }
 191         drm_mode_connector_update_edid_property(&radeon_connector->base, NULL);
 192
 193         return ret;
 194 }
 195
 196 static int radeon_dp_mst_get_modes(struct drm_connector *connector)
 197 {
 198         return radeon_dp_mst_get_ddc_modes(connector);
 199 }
 200
 201 static enum drm_mode_status
 202 radeon_dp_mst_mode_valid(struct drm_connector *connector,
 203                         struct drm_display_mode *mode)
 204 {
 205         /* TODO - validate mode against available PBN for link */
 206         if (mode->clock < 10000)
 207                 return MODE_CLOCK_LOW;
 208
 209         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 210                 return MODE_H_ILLEGAL;
 211
 212         return MODE_OK;
 213 }
 214
 215 struct drm_encoder *radeon_mst_best_encoder(struct drm_connector *connector)
 216 {
 217         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 218
 219         return &radeon_connector->mst_encoder->base;
 220 }
 221
 222 static const struct drm_connector_helper_funcs radeon_dp_mst_connector_helper_funcs = {
 223         .get_modes = radeon_dp_mst_get_modes,
 224         .mode_valid = radeon_dp_mst_mode_valid,
 225         .best_encoder = radeon_mst_best_encoder,
 226 };
 227
 228 static enum drm_connector_status
 229 radeon_dp_mst_detect(struct drm_connector *connector, bool force)
 230 {
 231         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 232         struct radeon_connector *master = radeon_connector->mst_port;
 233
 234         return drm_dp_mst_detect_port(connector, &master->mst_mgr, radeon_connector->port);
 235 }
 236
 237 static void
 238 radeon_dp_mst_connector_destroy(struct drm_connector *connector)
 239 {
 240         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 241         struct radeon_encoder *radeon_encoder = radeon_connector->mst_encoder;
 242
 243         drm_encoder_cleanup(&radeon_encoder->base);
 244         kfree(radeon_encoder);
 245         drm_connector_cleanup(connector);
 246         kfree(radeon_connector);
 247 }
 248
 249 static int radeon_connector_dpms(struct drm_connector *connector, int mode)
 250 {
 251         DRM_DEBUG_KMS("\n");
 252         return 0;
 253 }
 254
 255 static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = {
 256         .dpms = radeon_connector_dpms,
 257         .detect = radeon_dp_mst_detect,
 258         .fill_modes = drm_helper_probe_single_connector_modes,
 259         .destroy = radeon_dp_mst_connector_destroy,
 260 };
 261
 262 static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 263                                                          struct drm_dp_mst_port *port,
 264                                                          const char *pathprop)
 265 {
 266         struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
 267         struct drm_device *dev = master->base.dev;
 268         struct radeon_connector *radeon_connector;
 269         struct drm_connector *connector;
 270
 271         radeon_connector = kzalloc(sizeof(*radeon_connector), GFP_KERNEL);
 272         if (!radeon_connector)
 273                 return NULL;
 274
 275         radeon_connector->is_mst_connector = true;
 276         connector = &radeon_connector->base;
 277         radeon_connector->port = port;
 278         radeon_connector->mst_port = master;
 279         DRM_DEBUG_KMS("\n");
 280
 281         drm_connector_init(dev, connector, &radeon_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
 282         drm_connector_helper_add(connector, &radeon_dp_mst_connector_helper_funcs);
 283         radeon_connector->mst_encoder = radeon_dp_create_fake_mst_encoder(master);
 284
 285         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 286         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 287         drm_mode_connector_set_path_property(connector, pathprop);
 288
 289         return connector;
 290 }
 291
 292 static void radeon_dp_register_mst_connector(struct drm_connector *connector)
 293 {
 294         struct drm_device *dev = connector->dev;
 295         struct radeon_device *rdev = dev->dev_private;
 296
 297         drm_modeset_lock_all(dev);
 298         radeon_fb_add_connector(rdev, connector);
 299         drm_modeset_unlock_all(dev);
 300
 301         drm_connector_register(connector);
 302 }
 303
 304 static void radeon_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 305                                             struct drm_connector *connector)
 306 {
 307         struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
 308         struct drm_device *dev = master->base.dev;
 309         struct radeon_device *rdev = dev->dev_private;
 310
 311         drm_connector_unregister(connector);
 312         /* need to nuke the connector */
 313         drm_modeset_lock_all(dev);
 314         /* dpms off */
 315         radeon_fb_remove_connector(rdev, connector);
 316
 317         drm_connector_cleanup(connector);
 318         drm_modeset_unlock_all(dev);
 319
 320         kfree(connector);
 321         DRM_DEBUG_KMS("\n");
 322 }
 323
 324 static void radeon_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
 325 {
 326         struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
 327         struct drm_device *dev = master->base.dev;
 328
 329         drm_kms_helper_hotplug_event(dev);
 330 }
 331
 332 struct drm_dp_mst_topology_cbs mst_cbs = {
 333         .add_connector = radeon_dp_add_mst_connector,
 334         .register_connector = radeon_dp_register_mst_connector,
 335         .destroy_connector = radeon_dp_destroy_mst_connector,
 336         .hotplug = radeon_dp_mst_hotplug,
 337 };
 338
 339 struct radeon_connector *radeon_mst_find_connector(struct drm_encoder *encoder)
 340 {
 341         struct drm_device *dev = encoder->dev;
 342         struct drm_connector *connector;
 343
 344         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 345                 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 346                 if (!connector->encoder)
 347                         continue;
 348                 if (!radeon_connector->is_mst_connector)
 349                         continue;
 350
 351                 DRM_DEBUG_KMS("checking %p vs %p\n", connector->encoder, encoder);
 352                 if (connector->encoder == encoder)
 353                         return radeon_connector;
 354         }
 355         return NULL;
 356 }
 357
 358 void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
 359 {
 360         struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 361         struct drm_device *dev = crtc->dev;
 362         struct radeon_device *rdev = dev->dev_private;
 363         struct radeon_encoder *radeon_encoder = to_radeon_encoder(radeon_crtc->encoder);
 364         struct radeon_encoder_mst *mst_enc = radeon_encoder->enc_priv;
 365         struct radeon_connector *radeon_connector = radeon_mst_find_connector(&radeon_encoder->base);
 366         int dp_clock;
 367         struct radeon_connector_atom_dig *dig_connector = mst_enc->connector->con_priv;
 368
 369         if (radeon_connector) {
 370                 radeon_connector->pixelclock_for_modeset = mode->clock;
 371                 if (radeon_connector->base.display_info.bpc)
 372                         radeon_crtc->bpc = radeon_connector->base.display_info.bpc;
 373                 else
 374                         radeon_crtc->bpc = 8;
 375         }
 376
 377         DRM_DEBUG_KMS("dp_clock %p %d\n", dig_connector, dig_connector->dp_clock);
 378         dp_clock = dig_connector->dp_clock;
 379         radeon_crtc->ss_enabled =
 380                 radeon_atombios_get_asic_ss_info(rdev, &radeon_crtc->ss,
 381                                                  ASIC_INTERNAL_SS_ON_DP,
 382                                                  dp_clock);
 383 }
 384
 385 static void
 386 radeon_mst_encoder_dpms(struct drm_encoder *encoder, int mode)
 387 {
 388         struct drm_device *dev = encoder->dev;
 389         struct radeon_device *rdev = dev->dev_private;
 390         struct radeon_encoder *radeon_encoder, *primary;
 391         struct radeon_encoder_mst *mst_enc;
 392         struct radeon_encoder_atom_dig *dig_enc;
 393         struct radeon_connector *radeon_connector;
 394         struct drm_crtc *crtc;
 395         struct radeon_crtc *radeon_crtc;
 396         int ret, slots;
 397
 398         if (!ASIC_IS_DCE5(rdev)) {
 399                 DRM_ERROR("got mst dpms on non-DCE5\n");
 400                 return;
 401         }
 402
 403         radeon_connector = radeon_mst_find_connector(encoder);
 404         if (!radeon_connector)
 405                 return;
 406
 407         radeon_encoder = to_radeon_encoder(encoder);
 408
 409         mst_enc = radeon_encoder->enc_priv;
 410
 411         primary = mst_enc->primary;
 412
 413         dig_enc = primary->enc_priv;
 414
 415         crtc = encoder->crtc;
 416         DRM_DEBUG_KMS("got connector %d\n", dig_enc->active_mst_links);
 417
 418         switch (mode) {
 419         case DRM_MODE_DPMS_ON:
 420                 dig_enc->active_mst_links++;
 421
 422                 radeon_crtc = to_radeon_crtc(crtc);
 423
 424                 if (dig_enc->active_mst_links == 1) {
 425                         mst_enc->fe = dig_enc->dig_encoder;
 426                         mst_enc->fe_from_be = true;
 427                         atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
 428
 429                         atombios_dig_encoder_setup(&primary->base, ATOM_ENCODER_CMD_SETUP, 0);
 430                         atombios_dig_transmitter_setup2(&primary->base, ATOM_TRANSMITTER_ACTION_ENABLE,
 431                                                         0, 0, dig_enc->dig_encoder);
 432
 433                         if (radeon_dp_needs_link_train(mst_enc->connector) ||
 434                             dig_enc->active_mst_links == 1) {
 435                                 radeon_dp_link_train(&primary->base, &mst_enc->connector->base);
 436                         }
 437
 438                 } else {
 439                         mst_enc->fe = radeon_atom_pick_dig_encoder(encoder, radeon_crtc->crtc_id);
 440                         if (mst_enc->fe == -1)
 441                                 DRM_ERROR("failed to get frontend for dig encoder\n");
 442                         mst_enc->fe_from_be = false;
 443                         atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
 444                 }
 445
 446                 DRM_DEBUG_KMS("dig encoder is %d %d %d\n", dig_enc->dig_encoder,
 447                               dig_enc->linkb, radeon_crtc->crtc_id);
 448
 449                 ret = drm_dp_mst_allocate_vcpi(&radeon_connector->mst_port->mst_mgr,
 450                                                radeon_connector->port,
 451                                                mst_enc->pbn, &slots);
 452                 ret = drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr);
 453
 454                 radeon_dp_mst_set_be_cntl(primary, mst_enc,
 455                                           radeon_connector->mst_port->hpd.hpd, true);
 456
 457                 mst_enc->enc_active = true;
 458                 radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
 459                 radeon_dp_mst_set_vcp_size(radeon_encoder, slots, 0);
 460
 461                 atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0,
 462                                             mst_enc->fe);
 463                 ret = drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
 464
 465                 ret = drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
 466
 467                 break;
 468         case DRM_MODE_DPMS_STANDBY:
 469         case DRM_MODE_DPMS_SUSPEND:
 470         case DRM_MODE_DPMS_OFF:
 471                 DRM_ERROR("DPMS OFF %d\n", dig_enc->active_mst_links);
 472
 473                 if (!mst_enc->enc_active)
 474                         return;
 475
 476                 drm_dp_mst_reset_vcpi_slots(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
 477                 ret = drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr);
 478
 479                 drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
 480                 /* and this can also fail */
 481                 drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
 482
 483                 drm_dp_mst_deallocate_vcpi(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
 484
 485                 mst_enc->enc_active = false;
 486                 radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
 487
 488                 radeon_dp_mst_set_be_cntl(primary, mst_enc,
 489                                           radeon_connector->mst_port->hpd.hpd, false);
 490                 atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0,
 491                                             mst_enc->fe);
 492
 493                 if (!mst_enc->fe_from_be)
 494                         radeon_atom_release_dig_encoder(rdev, mst_enc->fe);
 495
 496                 mst_enc->fe_from_be = false;
 497                 dig_enc->active_mst_links--;
 498                 if (dig_enc->active_mst_links == 0) {
 499                         /* drop link */
 500                 }
 501
 502                 break;
 503         }
 504
 505 }
 506
 507 static bool radeon_mst_mode_fixup(struct drm_encoder *encoder,
 508                                    const struct drm_display_mode *mode,
 509                                    struct drm_display_mode *adjusted_mode)
 510 {
 511         struct radeon_encoder_mst *mst_enc;
 512         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 513         int bpp = 24;
 514
 515         mst_enc = radeon_encoder->enc_priv;
 516
 517         mst_enc->pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
 518
 519         mst_enc->primary->active_device = mst_enc->primary->devices & mst_enc->connector->devices;
 520         DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
 521                       mst_enc->primary->active_device, mst_enc->primary->devices,
 522                       mst_enc->connector->devices, mst_enc->primary->base.encoder_type);
 523
 524
 525         drm_mode_set_crtcinfo(adjusted_mode, 0);
 526         {
 527           struct radeon_connector_atom_dig *dig_connector;
 528
 529           dig_connector = mst_enc->connector->con_priv;
 530           dig_connector->dp_lane_count = drm_dp_max_lane_count(dig_connector->dpcd);
 531           dig_connector->dp_clock = radeon_dp_get_max_link_rate(&mst_enc->connector->base,
 532                                                                 dig_connector->dpcd);
 533           DRM_DEBUG_KMS("dig clock %p %d %d\n", dig_connector,
 534                         dig_connector->dp_lane_count, dig_connector->dp_clock);
 535         }
 536         return true;
 537 }
 538
 539 static void radeon_mst_encoder_prepare(struct drm_encoder *encoder)
 540 {
 541         struct radeon_connector *radeon_connector;
 542         struct radeon_encoder *radeon_encoder, *primary;
 543         struct radeon_encoder_mst *mst_enc;
 544         struct radeon_encoder_atom_dig *dig_enc;
 545
 546         radeon_connector = radeon_mst_find_connector(encoder);
 547         if (!radeon_connector) {
 548                 DRM_DEBUG_KMS("failed to find connector %p\n", encoder);
 549                 return;
 550         }
 551         radeon_encoder = to_radeon_encoder(encoder);
 552
 553         radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 554
 555         mst_enc = radeon_encoder->enc_priv;
 556
 557         primary = mst_enc->primary;
 558
 559         dig_enc = primary->enc_priv;
 560
 561         mst_enc->port = radeon_connector->port;
 562
 563         if (dig_enc->dig_encoder == -1) {
 564                 dig_enc->dig_encoder = radeon_atom_pick_dig_encoder(&primary->base, -1);
 565                 primary->offset = radeon_atom_set_enc_offset(dig_enc->dig_encoder);
 566                 atombios_set_mst_encoder_crtc_source(encoder, dig_enc->dig_encoder);
 567
 568
 569         }
 570         DRM_DEBUG_KMS("%d %d\n", dig_enc->dig_encoder, primary->offset);
 571 }
 572
 573 static void
 574 radeon_mst_encoder_mode_set(struct drm_encoder *encoder,
 575                              struct drm_display_mode *mode,
 576                              struct drm_display_mode *adjusted_mode)
 577 {
 578         DRM_DEBUG_KMS("\n");
 579 }
 580
 581 static void radeon_mst_encoder_commit(struct drm_encoder *encoder)
 582 {
 583         radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
 584         DRM_DEBUG_KMS("\n");
 585 }
 586
 587 static const struct drm_encoder_helper_funcs radeon_mst_helper_funcs = {
 588         .dpms = radeon_mst_encoder_dpms,
 589         .mode_fixup = radeon_mst_mode_fixup,
 590         .prepare = radeon_mst_encoder_prepare,
 591         .mode_set = radeon_mst_encoder_mode_set,
 592         .commit = radeon_mst_encoder_commit,
 593 };
 594
 595 void radeon_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 596 {
 597         drm_encoder_cleanup(encoder);
 598         kfree(encoder);
 599 }
 600
 601 static const struct drm_encoder_funcs radeon_dp_mst_enc_funcs = {
 602         .destroy = radeon_dp_mst_encoder_destroy,
 603 };
 604
 605 static struct radeon_encoder *
 606 radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector)
 607 {
 608         struct drm_device *dev = connector->base.dev;
 609         struct radeon_device *rdev = dev->dev_private;
 610         struct radeon_encoder *radeon_encoder;
 611         struct radeon_encoder_mst *mst_enc;
 612         struct drm_encoder *encoder;
 613         const struct drm_connector_helper_funcs *connector_funcs = connector->base.helper_private;
 614         struct drm_encoder *enc_master = connector_funcs->best_encoder(&connector->base);
 615
 616         DRM_DEBUG_KMS("enc master is %p\n", enc_master);
 617         radeon_encoder = kzalloc(sizeof(*radeon_encoder), GFP_KERNEL);
 618         if (!radeon_encoder)
 619                 return NULL;
 620
 621         radeon_encoder->enc_priv = kzalloc(sizeof(*mst_enc), GFP_KERNEL);
 622         if (!radeon_encoder->enc_priv) {
 623                 kfree(radeon_encoder);
 624                 return NULL;
 625         }
 626         encoder = &radeon_encoder->base;
 627         switch (rdev->num_crtc) {
 628         case 1:
 629                 encoder->possible_crtcs = 0x1;
 630                 break;
 631         case 2:
 632         default:
 633                 encoder->possible_crtcs = 0x3;
 634                 break;
 635         case 4:
 636                 encoder->possible_crtcs = 0xf;
 637                 break;
 638         case 6:
 639                 encoder->possible_crtcs = 0x3f;
 640                 break;
 641         }
 642
 643         drm_encoder_init(dev, &radeon_encoder->base, &radeon_dp_mst_enc_funcs,
 644                          DRM_MODE_ENCODER_DPMST);
 645         drm_encoder_helper_add(encoder, &radeon_mst_helper_funcs);
 646
 647         mst_enc = radeon_encoder->enc_priv;
 648         mst_enc->connector = connector;
 649         mst_enc->primary = to_radeon_encoder(enc_master);
 650         radeon_encoder->is_mst_encoder = true;
 651         return radeon_encoder;
 652 }
 653
 654 int
 655 radeon_dp_mst_init(struct radeon_connector *radeon_connector)
 656 {
 657         struct drm_device *dev = radeon_connector->base.dev;
 658
 659         if (!radeon_connector->ddc_bus->has_aux)
 660                 return 0;
 661
 662         radeon_connector->mst_mgr.cbs = &mst_cbs;
 663         return drm_dp_mst_topology_mgr_init(&radeon_connector->mst_mgr, dev->dev,
 664                                             &radeon_connector->ddc_bus->aux, 16, 6,
 665                                             radeon_connector->base.base.id);
 666 }
 667
 668 int
 669 radeon_dp_mst_probe(struct radeon_connector *radeon_connector)
 670 {
 671         struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
 672         struct drm_device *dev = radeon_connector->base.dev;
 673         struct radeon_device *rdev = dev->dev_private;
 674         int ret;
 675         u8 msg[1];
 676
 677         if (!radeon_mst)
 678                 return 0;
 679
 680         if (!ASIC_IS_DCE5(rdev))
 681                 return 0;
 682
 683         if (dig_connector->dpcd[DP_DPCD_REV] < 0x12)
 684                 return 0;
 685
 686         ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_MSTM_CAP, msg,
 687                                1);
 688         if (ret) {
 689                 if (msg[0] & DP_MST_CAP) {
 690                         DRM_DEBUG_KMS("Sink is MST capable\n");
 691                         dig_connector->is_mst = true;
 692                 } else {
 693                         DRM_DEBUG_KMS("Sink is not MST capable\n");
 694                         dig_connector->is_mst = false;
 695                 }
 696
 697         }
 698         drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
 699                                         dig_connector->is_mst);
 700         return dig_connector->is_mst;
 701 }
 702
 703 int
 704 radeon_dp_mst_check_status(struct radeon_connector *radeon_connector)
 705 {
 706         struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
 707         int retry;
 708
 709         if (dig_connector->is_mst) {
 710                 u8 esi[16] = { 0 };
 711                 int dret;
 712                 int ret = 0;
 713                 bool handled;
 714
 715                 dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
 716                                        DP_SINK_COUNT_ESI, esi, 8);
 717 go_again:
 718                 if (dret == 8) {
 719                         DRM_DEBUG_KMS("got esi %02x %02x %02x\n", esi[0], esi[1], esi[2]);
 720                         ret = drm_dp_mst_hpd_irq(&radeon_connector->mst_mgr, esi, &handled);
 721
 722                         if (handled) {
 723                                 for (retry = 0; retry < 3; retry++) {
 724                                         int wret;
 725                                         wret = drm_dp_dpcd_write(&radeon_connector->ddc_bus->aux,
 726                                                                  DP_SINK_COUNT_ESI + 1, &esi[1], 3);
 727                                         if (wret == 3)
 728                                                 break;
 729                                 }
 730
 731                                 dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
 732                                                         DP_SINK_COUNT_ESI, esi, 8);
 733                                 if (dret == 8) {
 734                                         DRM_DEBUG_KMS("got esi2 %02x %02x %02x\n", esi[0], esi[1], esi[2]);
 735                                         goto go_again;
 736                                 }
 737                         } else
 738                                 ret = 0;
 739
 740                         return ret;
 741                 } else {
 742                         DRM_DEBUG_KMS("failed to get ESI - device may have failed %d\n", ret);
 743                         dig_connector->is_mst = false;
 744                         drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
 745                                                         dig_connector->is_mst);
 746                         /* send a hotplug event */
 747                 }
 748         }
 749         return -EINVAL;
 750 }
 751
 752 #if defined(CONFIG_DEBUG_FS)
 753
 754 static int radeon_debugfs_mst_info(struct seq_file *m, void *data)
 755 {
 756         struct drm_info_node *node = (struct drm_info_node *)m->private;
 757         struct drm_device *dev = node->minor->dev;
 758         struct drm_connector *connector;
 759         struct radeon_connector *radeon_connector;
 760         struct radeon_connector_atom_dig *dig_connector;
 761         int i;
 762
 763         drm_modeset_lock_all(dev);
 764         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 765                 if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
 766                         continue;
 767
 768                 radeon_connector = to_radeon_connector(connector);
 769                 dig_connector = radeon_connector->con_priv;
 770                 if (radeon_connector->is_mst_connector)
 771                         continue;
 772                 if (!dig_connector->is_mst)
 773                         continue;
 774                 drm_dp_mst_dump_topology(m, &radeon_connector->mst_mgr);
 775
 776                 for (i = 0; i < radeon_connector->enabled_attribs; i++)
 777                         seq_printf(m, "attrib %d: %d %d\n", i,
 778                                    radeon_connector->cur_stream_attribs[i].fe,
 779                                    radeon_connector->cur_stream_attribs[i].slots);
 780         }
 781         drm_modeset_unlock_all(dev);
 782         return 0;
 783 }
 784
 785 static struct drm_info_list radeon_debugfs_mst_list[] = {
 786         {"radeon_mst_info", &radeon_debugfs_mst_info, 0, NULL},
 787 };
 788 #endif
 789
 790 int radeon_mst_debugfs_init(struct radeon_device *rdev)
 791 {
 792 #if defined(CONFIG_DEBUG_FS)
 793         return radeon_debugfs_add_files(rdev, radeon_debugfs_mst_list, 1);
 794 #endif
 795         return 0;
 796 }