drivers/gpu/drm/i915/display/intel_dp_mst.c

   1 /*
   2  * Copyright © 2008 Intel Corporation
   3  *             2014 Red Hat Inc.
   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 DEALINGS
  22  * IN THE SOFTWARE.
  23  *
  24  */
  25
  26 #include <drm/drm_atomic_helper.h>
  27 #include <drm/drm_edid.h>
  28 #include <drm/drm_probe_helper.h>
  29
  30 #include "i915_drv.h"
  31 #include "intel_atomic.h"
  32 #include "intel_audio.h"
  33 #include "intel_connector.h"
  34 #include "intel_ddi.h"
  35 #include "intel_display_types.h"
  36 #include "intel_dp.h"
  37 #include "intel_dp_mst.h"
  38 #include "intel_dpio_phy.h"
  39
  40 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
  41                                             struct intel_crtc_state *crtc_state,
  42                                             struct drm_connector_state *conn_state,
  43                                             struct link_config_limits *limits)
  44 {
  45         struct drm_atomic_state *state = crtc_state->uapi.state;
  46         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
  47         struct intel_dp *intel_dp = &intel_mst->primary->dp;
  48         struct intel_connector *connector =
  49                 to_intel_connector(conn_state->connector);
  50         const struct drm_display_mode *adjusted_mode =
  51                 &crtc_state->hw.adjusted_mode;
  52         void *port = connector->port;
  53         bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 0,
  54                                            DP_DPCD_QUIRK_CONSTANT_N);
  55         int bpp, slots = -EINVAL;
  56
  57         crtc_state->lane_count = limits->max_lane_count;
  58         crtc_state->port_clock = limits->max_clock;
  59
  60         for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
  61                 crtc_state->pipe_bpp = bpp;
  62
  63                 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
  64                                                        crtc_state->pipe_bpp,
  65                                                        false);
  66
  67                 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  68                                                       port, crtc_state->pbn, 0);
  69                 if (slots == -EDEADLK)
  70                         return slots;
  71                 if (slots >= 0)
  72                         break;
  73         }
  74
  75         if (slots < 0) {
  76                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  77                 return slots;
  78         }
  79
  80         intel_link_compute_m_n(crtc_state->pipe_bpp,
  81                                crtc_state->lane_count,
  82                                adjusted_mode->crtc_clock,
  83                                crtc_state->port_clock,
  84                                &crtc_state->dp_m_n,
  85                                constant_n, crtc_state->fec_enable);
  86         crtc_state->dp_m_n.tu = slots;
  87
  88         return 0;
  89 }
  90
  91 /*
  92  * Iterate over all connectors and return the smallest transcoder in the MST
  93  * stream
  94  */
  95 static enum transcoder
  96 intel_dp_mst_master_trans_compute(struct intel_atomic_state *state,
  97                                   struct intel_dp *mst_port)
  98 {
  99         struct drm_i915_private *dev_priv = to_i915(state->base.dev);
 100         struct intel_digital_connector_state *conn_state;
 101         struct intel_connector *connector;
 102         enum pipe ret = I915_MAX_PIPES;
 103         int i;
 104
 105         if (INTEL_GEN(dev_priv) < 12)
 106                 return INVALID_TRANSCODER;
 107
 108         for_each_new_intel_connector_in_state(state, connector, conn_state, i) {
 109                 struct intel_crtc_state *crtc_state;
 110                 struct intel_crtc *crtc;
 111
 112                 if (connector->mst_port != mst_port || !conn_state->base.crtc)
 113                         continue;
 114
 115                 crtc = to_intel_crtc(conn_state->base.crtc);
 116                 crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
 117                 if (!crtc_state->uapi.active)
 118                         continue;
 119
 120                 /*
 121                  * Using crtc->pipe because crtc_state->cpu_transcoder is
 122                  * computed, so others CRTCs could have non-computed
 123                  * cpu_transcoder
 124                  */
 125                 if (crtc->pipe < ret)
 126                         ret = crtc->pipe;
 127         }
 128
 129         if (ret == I915_MAX_PIPES)
 130                 return INVALID_TRANSCODER;
 131
 132         /* Simple cast works because TGL don't have a eDP transcoder */
 133         return (enum transcoder)ret;
 134 }
 135
 136 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 137                                        struct intel_crtc_state *pipe_config,
 138                                        struct drm_connector_state *conn_state)
 139 {
 140         struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state);
 141         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 142         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 143         struct intel_dp *intel_dp = &intel_mst->primary->dp;
 144         struct intel_connector *connector =
 145                 to_intel_connector(conn_state->connector);
 146         struct intel_digital_connector_state *intel_conn_state =
 147                 to_intel_digital_connector_state(conn_state);
 148         const struct drm_display_mode *adjusted_mode =
 149                 &pipe_config->hw.adjusted_mode;
 150         void *port = connector->port;
 151         struct link_config_limits limits;
 152         int ret;
 153
 154         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 155                 return -EINVAL;
 156
 157         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 158         pipe_config->has_pch_encoder = false;
 159
 160         if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
 161                 pipe_config->has_audio =
 162                         drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port);
 163         else
 164                 pipe_config->has_audio =
 165                         intel_conn_state->force_audio == HDMI_AUDIO_ON;
 166
 167         /*
 168          * for MST we always configure max link bw - the spec doesn't
 169          * seem to suggest we should do otherwise.
 170          */
 171         limits.min_clock =
 172         limits.max_clock = intel_dp_max_link_rate(intel_dp);
 173
 174         limits.min_lane_count =
 175         limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
 176
 177         limits.min_bpp = intel_dp_min_bpp(pipe_config);
 178         /*
 179          * FIXME: If all the streams can't fit into the link with
 180          * their current pipe_bpp we should reduce pipe_bpp across
 181          * the board until things start to fit. Until then we
 182          * limit to <= 8bpc since that's what was hardcoded for all
 183          * MST streams previously. This hack should be removed once
 184          * we have the proper retry logic in place.
 185          */
 186         limits.max_bpp = min(pipe_config->pipe_bpp, 24);
 187
 188         intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
 189
 190         ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
 191                                                conn_state, &limits);
 192         if (ret)
 193                 return ret;
 194
 195         pipe_config->limited_color_range =
 196                 intel_dp_limited_color_range(pipe_config, conn_state);
 197
 198         if (IS_GEN9_LP(dev_priv))
 199                 pipe_config->lane_lat_optim_mask =
 200                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 201
 202         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 203
 204         pipe_config->mst_master_transcoder = intel_dp_mst_master_trans_compute(state, intel_dp);
 205
 206         return 0;
 207 }
 208
 209 /*
 210  * If one of the connectors in a MST stream needs a modeset, mark all CRTCs
 211  * that shares the same MST stream as mode changed,
 212  * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do
 213  * a fastset when possible.
 214  */
 215 static int
 216 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector,
 217                                        struct intel_atomic_state *state)
 218 {
 219         struct drm_i915_private *dev_priv = to_i915(state->base.dev);
 220         struct drm_connector_list_iter connector_list_iter;
 221         struct intel_connector *connector_iter;
 222
 223         if (INTEL_GEN(dev_priv) < 12)
 224                 return  0;
 225
 226         if (!intel_connector_needs_modeset(state, &connector->base))
 227                 return 0;
 228
 229         drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter);
 230         for_each_intel_connector_iter(connector_iter, &connector_list_iter) {
 231                 struct intel_digital_connector_state *conn_iter_state;
 232                 struct intel_crtc_state *crtc_state;
 233                 struct intel_crtc *crtc;
 234                 int ret;
 235
 236                 if (connector_iter->mst_port != connector->mst_port ||
 237                     connector_iter == connector)
 238                         continue;
 239
 240                 conn_iter_state = intel_atomic_get_digital_connector_state(state,
 241                                                                            connector_iter);
 242                 if (IS_ERR(conn_iter_state)) {
 243                         drm_connector_list_iter_end(&connector_list_iter);
 244                         return PTR_ERR(conn_iter_state);
 245                 }
 246
 247                 if (!conn_iter_state->base.crtc)
 248                         continue;
 249
 250                 crtc = to_intel_crtc(conn_iter_state->base.crtc);
 251                 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
 252                 if (IS_ERR(crtc_state)) {
 253                         drm_connector_list_iter_end(&connector_list_iter);
 254                         return PTR_ERR(crtc_state);
 255                 }
 256
 257                 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
 258                 if (ret) {
 259                         drm_connector_list_iter_end(&connector_list_iter);
 260                         return ret;
 261                 }
 262                 crtc_state->uapi.mode_changed = true;
 263         }
 264         drm_connector_list_iter_end(&connector_list_iter);
 265
 266         return 0;
 267 }
 268
 269 static int
 270 intel_dp_mst_atomic_check(struct drm_connector *connector,
 271                           struct drm_atomic_state *_state)
 272 {
 273         struct intel_atomic_state *state = to_intel_atomic_state(_state);
 274         struct drm_connector_state *new_conn_state =
 275                 drm_atomic_get_new_connector_state(&state->base, connector);
 276         struct drm_connector_state *old_conn_state =
 277                 drm_atomic_get_old_connector_state(&state->base, connector);
 278         struct intel_connector *intel_connector =
 279                 to_intel_connector(connector);
 280         struct drm_crtc *new_crtc = new_conn_state->crtc;
 281         struct drm_dp_mst_topology_mgr *mgr;
 282         int ret;
 283
 284         ret = intel_digital_connector_atomic_check(connector, &state->base);
 285         if (ret)
 286                 return ret;
 287
 288         ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state);
 289         if (ret)
 290                 return ret;
 291
 292         if (!old_conn_state->crtc)
 293                 return 0;
 294
 295         /* We only want to free VCPI if this state disables the CRTC on this
 296          * connector
 297          */
 298         if (new_crtc) {
 299                 struct intel_crtc *intel_crtc = to_intel_crtc(new_crtc);
 300                 struct intel_crtc_state *crtc_state =
 301                         intel_atomic_get_new_crtc_state(state, intel_crtc);
 302
 303                 if (!crtc_state ||
 304                     !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) ||
 305                     crtc_state->uapi.enable)
 306                         return 0;
 307         }
 308
 309         mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr;
 310         ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr,
 311                                                intel_connector->port);
 312
 313         return ret;
 314 }
 315
 316 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 317                                  const struct intel_crtc_state *old_crtc_state,
 318                                  const struct drm_connector_state *old_conn_state)
 319 {
 320         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 321         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 322         struct intel_dp *intel_dp = &intel_dig_port->dp;
 323         struct intel_connector *connector =
 324                 to_intel_connector(old_conn_state->connector);
 325         int ret;
 326
 327         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 328
 329         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 330
 331         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 332         if (ret) {
 333                 DRM_DEBUG_KMS("failed to update payload %d\n", ret);
 334         }
 335         if (old_crtc_state->has_audio)
 336                 intel_audio_codec_disable(encoder,
 337                                           old_crtc_state, old_conn_state);
 338 }
 339
 340 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 341                                       const struct intel_crtc_state *old_crtc_state,
 342                                       const struct drm_connector_state *old_conn_state)
 343 {
 344         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 345         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 346         struct intel_dp *intel_dp = &intel_dig_port->dp;
 347         struct intel_connector *connector =
 348                 to_intel_connector(old_conn_state->connector);
 349         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 350         bool last_mst_stream;
 351         u32 val;
 352
 353         intel_dp->active_mst_links--;
 354         last_mst_stream = intel_dp->active_mst_links == 0;
 355         drm_WARN_ON(&dev_priv->drm,
 356                     INTEL_GEN(dev_priv) >= 12 && last_mst_stream &&
 357                     !intel_dp_mst_is_master_trans(old_crtc_state));
 358
 359         intel_crtc_vblank_off(old_crtc_state);
 360
 361         intel_disable_pipe(old_crtc_state);
 362
 363         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 364
 365         val = intel_de_read(dev_priv,
 366                             TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder));
 367         val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
 368         intel_de_write(dev_priv,
 369                        TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder),
 370                        val);
 371
 372         if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status,
 373                                   DP_TP_STATUS_ACT_SENT, 1))
 374                 DRM_ERROR("Timed out waiting for ACT sent when disabling\n");
 375         drm_dp_check_act_status(&intel_dp->mst_mgr);
 376
 377         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 378
 379         intel_ddi_disable_transcoder_func(old_crtc_state);
 380
 381         if (INTEL_GEN(dev_priv) >= 9)
 382                 skl_scaler_disable(old_crtc_state);
 383         else
 384                 ilk_pfit_disable(old_crtc_state);
 385
 386         /*
 387          * Power down mst path before disabling the port, otherwise we end
 388          * up getting interrupts from the sink upon detecting link loss.
 389          */
 390         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 391                                      false);
 392         /*
 393          * From TGL spec: "If multi-stream slave transcoder: Configure
 394          * Transcoder Clock Select to direct no clock to the transcoder"
 395          *
 396          * From older GENs spec: "Configure Transcoder Clock Select to direct
 397          * no clock to the transcoder"
 398          */
 399         if (INTEL_GEN(dev_priv) < 12 || !last_mst_stream)
 400                 intel_ddi_disable_pipe_clock(old_crtc_state);
 401
 402
 403         intel_mst->connector = NULL;
 404         if (last_mst_stream)
 405                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 406                                                   old_crtc_state, NULL);
 407
 408         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 409 }
 410
 411 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 412                                         const struct intel_crtc_state *pipe_config,
 413                                         const struct drm_connector_state *conn_state)
 414 {
 415         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 416         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 417         struct intel_dp *intel_dp = &intel_dig_port->dp;
 418
 419         if (intel_dp->active_mst_links == 0)
 420                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 421                                                     pipe_config, NULL);
 422 }
 423
 424 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 425                                     const struct intel_crtc_state *pipe_config,
 426                                     const struct drm_connector_state *conn_state)
 427 {
 428         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 429         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 430         struct intel_dp *intel_dp = &intel_dig_port->dp;
 431         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 432         struct intel_connector *connector =
 433                 to_intel_connector(conn_state->connector);
 434         int ret;
 435         u32 temp;
 436         bool first_mst_stream;
 437
 438         /* MST encoders are bound to a crtc, not to a connector,
 439          * force the mapping here for get_hw_state.
 440          */
 441         connector->encoder = encoder;
 442         intel_mst->connector = connector;
 443         first_mst_stream = intel_dp->active_mst_links == 0;
 444         drm_WARN_ON(&dev_priv->drm,
 445                     INTEL_GEN(dev_priv) >= 12 && first_mst_stream &&
 446                     !intel_dp_mst_is_master_trans(pipe_config));
 447
 448         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 449
 450         if (first_mst_stream)
 451                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 452
 453         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 454
 455         if (first_mst_stream)
 456                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 457                                                 pipe_config, NULL);
 458
 459         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 460                                        connector->port,
 461                                        pipe_config->pbn,
 462                                        pipe_config->dp_m_n.tu);
 463         if (!ret)
 464                 DRM_ERROR("failed to allocate vcpi\n");
 465
 466         intel_dp->active_mst_links++;
 467         temp = intel_de_read(dev_priv, intel_dp->regs.dp_tp_status);
 468         intel_de_write(dev_priv, intel_dp->regs.dp_tp_status, temp);
 469
 470         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 471
 472         /*
 473          * Before Gen 12 this is not done as part of
 474          * intel_dig_port->base.pre_enable() and should be done here. For
 475          * Gen 12+ the step in which this should be done is different for the
 476          * first MST stream, so it's done on the DDI for the first stream and
 477          * here for the following ones.
 478          */
 479         if (INTEL_GEN(dev_priv) < 12 || !first_mst_stream)
 480                 intel_ddi_enable_pipe_clock(pipe_config);
 481
 482         intel_ddi_set_dp_msa(pipe_config, conn_state);
 483
 484         intel_dp_set_m_n(pipe_config, M1_N1);
 485 }
 486
 487 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 488                                 const struct intel_crtc_state *pipe_config,
 489                                 const struct drm_connector_state *conn_state)
 490 {
 491         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 492         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 493         struct intel_dp *intel_dp = &intel_dig_port->dp;
 494         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 495
 496         drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder);
 497
 498         intel_enable_pipe(pipe_config);
 499
 500         intel_crtc_vblank_on(pipe_config);
 501
 502         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 503
 504         if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status,
 505                                   DP_TP_STATUS_ACT_SENT, 1))
 506                 DRM_ERROR("Timed out waiting for ACT sent\n");
 507
 508         drm_dp_check_act_status(&intel_dp->mst_mgr);
 509
 510         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 511         if (pipe_config->has_audio)
 512                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 513 }
 514
 515 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 516                                       enum pipe *pipe)
 517 {
 518         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 519         *pipe = intel_mst->pipe;
 520         if (intel_mst->connector)
 521                 return true;
 522         return false;
 523 }
 524
 525 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 526                                         struct intel_crtc_state *pipe_config)
 527 {
 528         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 529         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 530
 531         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 532 }
 533
 534 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 535 {
 536         struct intel_connector *intel_connector = to_intel_connector(connector);
 537         struct intel_dp *intel_dp = intel_connector->mst_port;
 538         struct edid *edid;
 539         int ret;
 540
 541         if (drm_connector_is_unregistered(connector))
 542                 return intel_connector_update_modes(connector, NULL);
 543
 544         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 545         ret = intel_connector_update_modes(connector, edid);
 546         kfree(edid);
 547
 548         return ret;
 549 }
 550
 551 static int
 552 intel_dp_mst_connector_late_register(struct drm_connector *connector)
 553 {
 554         struct intel_connector *intel_connector = to_intel_connector(connector);
 555         int ret;
 556
 557         ret = drm_dp_mst_connector_late_register(connector,
 558                                                  intel_connector->port);
 559         if (ret < 0)
 560                 return ret;
 561
 562         ret = intel_connector_register(connector);
 563         if (ret < 0)
 564                 drm_dp_mst_connector_early_unregister(connector,
 565                                                       intel_connector->port);
 566
 567         return ret;
 568 }
 569
 570 static void
 571 intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
 572 {
 573         struct intel_connector *intel_connector = to_intel_connector(connector);
 574
 575         intel_connector_unregister(connector);
 576         drm_dp_mst_connector_early_unregister(connector,
 577                                               intel_connector->port);
 578 }
 579
 580 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 581         .fill_modes = drm_helper_probe_single_connector_modes,
 582         .atomic_get_property = intel_digital_connector_atomic_get_property,
 583         .atomic_set_property = intel_digital_connector_atomic_set_property,
 584         .late_register = intel_dp_mst_connector_late_register,
 585         .early_unregister = intel_dp_mst_connector_early_unregister,
 586         .destroy = intel_connector_destroy,
 587         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 588         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
 589 };
 590
 591 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 592 {
 593         return intel_dp_mst_get_ddc_modes(connector);
 594 }
 595
 596 static enum drm_mode_status
 597 intel_dp_mst_mode_valid(struct drm_connector *connector,
 598                         struct drm_display_mode *mode)
 599 {
 600         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 601         struct intel_connector *intel_connector = to_intel_connector(connector);
 602         struct intel_dp *intel_dp = intel_connector->mst_port;
 603         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 604         int max_rate, mode_rate, max_lanes, max_link_clock;
 605
 606         if (drm_connector_is_unregistered(connector))
 607                 return MODE_ERROR;
 608
 609         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 610                 return MODE_NO_DBLESCAN;
 611
 612         max_link_clock = intel_dp_max_link_rate(intel_dp);
 613         max_lanes = intel_dp_max_lane_count(intel_dp);
 614
 615         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 616         mode_rate = intel_dp_link_required(mode->clock, 18);
 617
 618         /* TODO - validate mode against available PBN for link */
 619         if (mode->clock < 10000)
 620                 return MODE_CLOCK_LOW;
 621
 622         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 623                 return MODE_H_ILLEGAL;
 624
 625         if (mode_rate > max_rate || mode->clock > max_dotclk)
 626                 return MODE_CLOCK_HIGH;
 627
 628         return intel_mode_valid_max_plane_size(dev_priv, mode);
 629 }
 630
 631 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 632                                                          struct drm_connector_state *state)
 633 {
 634         struct intel_connector *intel_connector = to_intel_connector(connector);
 635         struct intel_dp *intel_dp = intel_connector->mst_port;
 636         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 637
 638         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 639 }
 640
 641 static int
 642 intel_dp_mst_detect(struct drm_connector *connector,
 643                     struct drm_modeset_acquire_ctx *ctx, bool force)
 644 {
 645         struct intel_connector *intel_connector = to_intel_connector(connector);
 646         struct intel_dp *intel_dp = intel_connector->mst_port;
 647
 648         if (drm_connector_is_unregistered(connector))
 649                 return connector_status_disconnected;
 650
 651         return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr,
 652                                       intel_connector->port);
 653 }
 654
 655 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 656         .get_modes = intel_dp_mst_get_modes,
 657         .mode_valid = intel_dp_mst_mode_valid,
 658         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 659         .atomic_check = intel_dp_mst_atomic_check,
 660         .detect_ctx = intel_dp_mst_detect,
 661 };
 662
 663 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 664 {
 665         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder));
 666
 667         drm_encoder_cleanup(encoder);
 668         kfree(intel_mst);
 669 }
 670
 671 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 672         .destroy = intel_dp_mst_encoder_destroy,
 673 };
 674
 675 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 676 {
 677         if (intel_attached_encoder(connector) && connector->base.state->crtc) {
 678                 enum pipe pipe;
 679                 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe))
 680                         return false;
 681                 return true;
 682         }
 683         return false;
 684 }
 685
 686 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
 687 {
 688         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 689         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 690         struct drm_device *dev = intel_dig_port->base.base.dev;
 691         struct drm_i915_private *dev_priv = to_i915(dev);
 692         struct intel_connector *intel_connector;
 693         struct drm_connector *connector;
 694         enum pipe pipe;
 695         int ret;
 696
 697         intel_connector = intel_connector_alloc();
 698         if (!intel_connector)
 699                 return NULL;
 700
 701         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 702         intel_connector->mst_port = intel_dp;
 703         intel_connector->port = port;
 704         drm_dp_mst_get_port_malloc(port);
 705
 706         connector = &intel_connector->base;
 707         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 708                                  DRM_MODE_CONNECTOR_DisplayPort);
 709         if (ret) {
 710                 intel_connector_free(intel_connector);
 711                 return NULL;
 712         }
 713
 714         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 715
 716         for_each_pipe(dev_priv, pipe) {
 717                 struct drm_encoder *enc =
 718                         &intel_dp->mst_encoders[pipe]->base.base;
 719
 720                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 721                 if (ret)
 722                         goto err;
 723         }
 724
 725         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 726         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 727
 728         ret = drm_connector_set_path_property(connector, pathprop);
 729         if (ret)
 730                 goto err;
 731
 732         intel_attach_force_audio_property(connector);
 733         intel_attach_broadcast_rgb_property(connector);
 734
 735         /*
 736          * Reuse the prop from the SST connector because we're
 737          * not allowed to create new props after device registration.
 738          */
 739         connector->max_bpc_property =
 740                 intel_dp->attached_connector->base.max_bpc_property;
 741         if (connector->max_bpc_property)
 742                 drm_connector_attach_max_bpc_property(connector, 6, 12);
 743
 744         return connector;
 745
 746 err:
 747         drm_connector_cleanup(connector);
 748         return NULL;
 749 }
 750
 751 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 752         .add_connector = intel_dp_add_mst_connector,
 753 };
 754
 755 static struct intel_dp_mst_encoder *
 756 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 757 {
 758         struct intel_dp_mst_encoder *intel_mst;
 759         struct intel_encoder *intel_encoder;
 760         struct drm_device *dev = intel_dig_port->base.base.dev;
 761
 762         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 763
 764         if (!intel_mst)
 765                 return NULL;
 766
 767         intel_mst->pipe = pipe;
 768         intel_encoder = &intel_mst->base;
 769         intel_mst->primary = intel_dig_port;
 770
 771         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 772                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 773
 774         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 775         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 776         intel_encoder->port = intel_dig_port->base.port;
 777         intel_encoder->cloneable = 0;
 778         /*
 779          * This is wrong, but broken userspace uses the intersection
 780          * of possible_crtcs of all the encoders of a given connector
 781          * to figure out which crtcs can drive said connector. What
 782          * should be used instead is the union of possible_crtcs.
 783          * To keep such userspace functioning we must misconfigure
 784          * this to make sure the intersection is not empty :(
 785          */
 786         intel_encoder->pipe_mask = ~0;
 787
 788         intel_encoder->compute_config = intel_dp_mst_compute_config;
 789         intel_encoder->disable = intel_mst_disable_dp;
 790         intel_encoder->post_disable = intel_mst_post_disable_dp;
 791         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 792         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 793         intel_encoder->enable = intel_mst_enable_dp;
 794         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 795         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 796
 797         return intel_mst;
 798
 799 }
 800
 801 static bool
 802 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 803 {
 804         struct intel_dp *intel_dp = &intel_dig_port->dp;
 805         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 806         enum pipe pipe;
 807
 808         for_each_pipe(dev_priv, pipe)
 809                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 810         return true;
 811 }
 812
 813 int
 814 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
 815 {
 816         return intel_dig_port->dp.active_mst_links;
 817 }
 818
 819 int
 820 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 821 {
 822         struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev);
 823         struct intel_dp *intel_dp = &intel_dig_port->dp;
 824         enum port port = intel_dig_port->base.port;
 825         int ret;
 826
 827         if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
 828                 return 0;
 829
 830         if (INTEL_GEN(i915) < 12 && port == PORT_A)
 831                 return 0;
 832
 833         if (INTEL_GEN(i915) < 11 && port == PORT_E)
 834                 return 0;
 835
 836         intel_dp->mst_mgr.cbs = &mst_cbs;
 837
 838         /* create encoders */
 839         intel_dp_create_fake_mst_encoders(intel_dig_port);
 840         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
 841                                            &intel_dp->aux, 16, 3, conn_base_id);
 842         if (ret)
 843                 return ret;
 844
 845         intel_dp->can_mst = true;
 846
 847         return 0;
 848 }
 849
 850 void
 851 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 852 {
 853         struct intel_dp *intel_dp = &intel_dig_port->dp;
 854
 855         if (!intel_dp->can_mst)
 856                 return;
 857
 858         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 859         /* encoders will get killed by normal cleanup */
 860 }
 861
 862 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state)
 863 {
 864         return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder;
 865 }
 866
 867 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state)
 868 {
 869         return crtc_state->mst_master_transcoder != INVALID_TRANSCODER &&
 870                crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder;
 871 }