drivers/gpu/drm/i915/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_dp.h"
  36 #include "intel_dp_mst.h"
  37 #include "intel_dpio_phy.h"
  38 #include "intel_drv.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->base.state;
  46         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  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->base.adjusted_mode;
  52         void *port = connector->port;
  53         bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
  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
  66                 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
  67                                                       port, crtc_state->pbn);
  68                 if (slots == -EDEADLK)
  69                         return slots;
  70                 if (slots >= 0)
  71                         break;
  72         }
  73
  74         if (slots < 0) {
  75                 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
  76                 return slots;
  77         }
  78
  79         intel_link_compute_m_n(crtc_state->pipe_bpp,
  80                                crtc_state->lane_count,
  81                                adjusted_mode->crtc_clock,
  82                                crtc_state->port_clock,
  83                                &crtc_state->dp_m_n,
  84                                constant_n);
  85         crtc_state->dp_m_n.tu = slots;
  86
  87         return 0;
  88 }
  89
  90 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
  91                                        struct intel_crtc_state *pipe_config,
  92                                        struct drm_connector_state *conn_state)
  93 {
  94         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
  95         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  96         struct intel_dp *intel_dp = &intel_mst->primary->dp;
  97         struct intel_connector *connector =
  98                 to_intel_connector(conn_state->connector);
  99         struct intel_digital_connector_state *intel_conn_state =
 100                 to_intel_digital_connector_state(conn_state);
 101         const struct drm_display_mode *adjusted_mode =
 102                 &pipe_config->base.adjusted_mode;
 103         void *port = connector->port;
 104         struct link_config_limits limits;
 105         int ret;
 106
 107         if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 108                 return -EINVAL;
 109
 110         pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 111         pipe_config->has_pch_encoder = false;
 112
 113         if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
 114                 pipe_config->has_audio =
 115                         drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port);
 116         else
 117                 pipe_config->has_audio =
 118                         intel_conn_state->force_audio == HDMI_AUDIO_ON;
 119
 120         /*
 121          * for MST we always configure max link bw - the spec doesn't
 122          * seem to suggest we should do otherwise.
 123          */
 124         limits.min_clock =
 125         limits.max_clock = intel_dp_max_link_rate(intel_dp);
 126
 127         limits.min_lane_count =
 128         limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
 129
 130         limits.min_bpp = intel_dp_min_bpp(pipe_config);
 131         limits.max_bpp = pipe_config->pipe_bpp;
 132
 133         intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
 134
 135         ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
 136                                                conn_state, &limits);
 137         if (ret)
 138                 return ret;
 139
 140         pipe_config->limited_color_range =
 141                 intel_dp_limited_color_range(pipe_config, conn_state);
 142
 143         if (IS_GEN9_LP(dev_priv))
 144                 pipe_config->lane_lat_optim_mask =
 145                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 146
 147         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 148
 149         return 0;
 150 }
 151
 152 static int
 153 intel_dp_mst_atomic_check(struct drm_connector *connector,
 154                           struct drm_connector_state *new_conn_state)
 155 {
 156         struct drm_atomic_state *state = new_conn_state->state;
 157         struct drm_connector_state *old_conn_state =
 158                 drm_atomic_get_old_connector_state(state, connector);
 159         struct intel_connector *intel_connector =
 160                 to_intel_connector(connector);
 161         struct drm_crtc *new_crtc = new_conn_state->crtc;
 162         struct drm_crtc_state *crtc_state;
 163         struct drm_dp_mst_topology_mgr *mgr;
 164         int ret;
 165
 166         ret = intel_digital_connector_atomic_check(connector, new_conn_state);
 167         if (ret)
 168                 return ret;
 169
 170         if (!old_conn_state->crtc)
 171                 return 0;
 172
 173         /* We only want to free VCPI if this state disables the CRTC on this
 174          * connector
 175          */
 176         if (new_crtc) {
 177                 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
 178
 179                 if (!crtc_state ||
 180                     !drm_atomic_crtc_needs_modeset(crtc_state) ||
 181                     crtc_state->enable)
 182                         return 0;
 183         }
 184
 185         mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
 186         ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
 187                                                intel_connector->port);
 188
 189         return ret;
 190 }
 191
 192 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 193                                  const struct intel_crtc_state *old_crtc_state,
 194                                  const struct drm_connector_state *old_conn_state)
 195 {
 196         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 197         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 198         struct intel_dp *intel_dp = &intel_dig_port->dp;
 199         struct intel_connector *connector =
 200                 to_intel_connector(old_conn_state->connector);
 201         int ret;
 202
 203         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 204
 205         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 206
 207         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 208         if (ret) {
 209                 DRM_ERROR("failed to update payload %d\n", ret);
 210         }
 211         if (old_crtc_state->has_audio)
 212                 intel_audio_codec_disable(encoder,
 213                                           old_crtc_state, old_conn_state);
 214 }
 215
 216 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 217                                       const struct intel_crtc_state *old_crtc_state,
 218                                       const struct drm_connector_state *old_conn_state)
 219 {
 220         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 221         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 222         struct intel_dp *intel_dp = &intel_dig_port->dp;
 223         struct intel_connector *connector =
 224                 to_intel_connector(old_conn_state->connector);
 225
 226         intel_ddi_disable_pipe_clock(old_crtc_state);
 227
 228         /* this can fail */
 229         drm_dp_check_act_status(&intel_dp->mst_mgr);
 230         /* and this can also fail */
 231         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 232
 233         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 234
 235         /*
 236          * Power down mst path before disabling the port, otherwise we end
 237          * up getting interrupts from the sink upon detecting link loss.
 238          */
 239         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 240                                      false);
 241
 242         intel_dp->active_mst_links--;
 243
 244         intel_mst->connector = NULL;
 245         if (intel_dp->active_mst_links == 0) {
 246                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 247                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 248                                                   old_crtc_state, NULL);
 249         }
 250
 251         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 252 }
 253
 254 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 255                                         const struct intel_crtc_state *pipe_config,
 256                                         const struct drm_connector_state *conn_state)
 257 {
 258         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 259         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 260         struct intel_dp *intel_dp = &intel_dig_port->dp;
 261
 262         if (intel_dp->active_mst_links == 0)
 263                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 264                                                     pipe_config, NULL);
 265 }
 266
 267 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 268                                           const struct intel_crtc_state *old_crtc_state,
 269                                           const struct drm_connector_state *old_conn_state)
 270 {
 271         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 272         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 273         struct intel_dp *intel_dp = &intel_dig_port->dp;
 274
 275         if (intel_dp->active_mst_links == 0)
 276                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 277                                                       old_crtc_state,
 278                                                       old_conn_state);
 279 }
 280
 281 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 282                                     const struct intel_crtc_state *pipe_config,
 283                                     const struct drm_connector_state *conn_state)
 284 {
 285         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 286         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 287         struct intel_dp *intel_dp = &intel_dig_port->dp;
 288         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 289         enum port port = intel_dig_port->base.port;
 290         struct intel_connector *connector =
 291                 to_intel_connector(conn_state->connector);
 292         int ret;
 293         u32 temp;
 294
 295         /* MST encoders are bound to a crtc, not to a connector,
 296          * force the mapping here for get_hw_state.
 297          */
 298         connector->encoder = encoder;
 299         intel_mst->connector = connector;
 300
 301         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 302
 303         if (intel_dp->active_mst_links == 0)
 304                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 305
 306         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 307
 308         if (intel_dp->active_mst_links == 0)
 309                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 310                                                 pipe_config, NULL);
 311
 312         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 313                                        connector->port,
 314                                        pipe_config->pbn,
 315                                        pipe_config->dp_m_n.tu);
 316         if (!ret)
 317                 DRM_ERROR("failed to allocate vcpi\n");
 318
 319         intel_dp->active_mst_links++;
 320         temp = I915_READ(DP_TP_STATUS(port));
 321         I915_WRITE(DP_TP_STATUS(port), temp);
 322
 323         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 324
 325         intel_ddi_enable_pipe_clock(pipe_config);
 326 }
 327
 328 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 329                                 const struct intel_crtc_state *pipe_config,
 330                                 const struct drm_connector_state *conn_state)
 331 {
 332         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 333         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 334         struct intel_dp *intel_dp = &intel_dig_port->dp;
 335         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 336         enum port port = intel_dig_port->base.port;
 337
 338         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 339
 340         if (intel_wait_for_register(&dev_priv->uncore,
 341                                     DP_TP_STATUS(port),
 342                                     DP_TP_STATUS_ACT_SENT,
 343                                     DP_TP_STATUS_ACT_SENT,
 344                                     1))
 345                 DRM_ERROR("Timed out waiting for ACT sent\n");
 346
 347         drm_dp_check_act_status(&intel_dp->mst_mgr);
 348
 349         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 350         if (pipe_config->has_audio)
 351                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 352 }
 353
 354 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 355                                       enum pipe *pipe)
 356 {
 357         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 358         *pipe = intel_mst->pipe;
 359         if (intel_mst->connector)
 360                 return true;
 361         return false;
 362 }
 363
 364 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 365                                         struct intel_crtc_state *pipe_config)
 366 {
 367         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 368         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 369
 370         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 371 }
 372
 373 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 374 {
 375         struct intel_connector *intel_connector = to_intel_connector(connector);
 376         struct intel_dp *intel_dp = intel_connector->mst_port;
 377         struct edid *edid;
 378         int ret;
 379
 380         if (drm_connector_is_unregistered(connector))
 381                 return intel_connector_update_modes(connector, NULL);
 382
 383         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 384         ret = intel_connector_update_modes(connector, edid);
 385         kfree(edid);
 386
 387         return ret;
 388 }
 389
 390 static enum drm_connector_status
 391 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 392 {
 393         struct intel_connector *intel_connector = to_intel_connector(connector);
 394         struct intel_dp *intel_dp = intel_connector->mst_port;
 395
 396         if (drm_connector_is_unregistered(connector))
 397                 return connector_status_disconnected;
 398         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 399                                       intel_connector->port);
 400 }
 401
 402 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 403         .detect = intel_dp_mst_detect,
 404         .fill_modes = drm_helper_probe_single_connector_modes,
 405         .atomic_get_property = intel_digital_connector_atomic_get_property,
 406         .atomic_set_property = intel_digital_connector_atomic_set_property,
 407         .late_register = intel_connector_register,
 408         .early_unregister = intel_connector_unregister,
 409         .destroy = intel_connector_destroy,
 410         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 411         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
 412 };
 413
 414 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 415 {
 416         return intel_dp_mst_get_ddc_modes(connector);
 417 }
 418
 419 static enum drm_mode_status
 420 intel_dp_mst_mode_valid(struct drm_connector *connector,
 421                         struct drm_display_mode *mode)
 422 {
 423         struct intel_connector *intel_connector = to_intel_connector(connector);
 424         struct intel_dp *intel_dp = intel_connector->mst_port;
 425         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 426         int max_rate, mode_rate, max_lanes, max_link_clock;
 427
 428         if (drm_connector_is_unregistered(connector))
 429                 return MODE_ERROR;
 430
 431         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 432                 return MODE_NO_DBLESCAN;
 433
 434         max_link_clock = intel_dp_max_link_rate(intel_dp);
 435         max_lanes = intel_dp_max_lane_count(intel_dp);
 436
 437         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 438         mode_rate = intel_dp_link_required(mode->clock, 18);
 439
 440         /* TODO - validate mode against available PBN for link */
 441         if (mode->clock < 10000)
 442                 return MODE_CLOCK_LOW;
 443
 444         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 445                 return MODE_H_ILLEGAL;
 446
 447         if (mode_rate > max_rate || mode->clock > max_dotclk)
 448                 return MODE_CLOCK_HIGH;
 449
 450         return MODE_OK;
 451 }
 452
 453 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 454                                                          struct drm_connector_state *state)
 455 {
 456         struct intel_connector *intel_connector = to_intel_connector(connector);
 457         struct intel_dp *intel_dp = intel_connector->mst_port;
 458         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 459
 460         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 461 }
 462
 463 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 464         .get_modes = intel_dp_mst_get_modes,
 465         .mode_valid = intel_dp_mst_mode_valid,
 466         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 467         .atomic_check = intel_dp_mst_atomic_check,
 468 };
 469
 470 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 471 {
 472         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 473
 474         drm_encoder_cleanup(encoder);
 475         kfree(intel_mst);
 476 }
 477
 478 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 479         .destroy = intel_dp_mst_encoder_destroy,
 480 };
 481
 482 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 483 {
 484         if (connector->encoder && connector->base.state->crtc) {
 485                 enum pipe pipe;
 486                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 487                         return false;
 488                 return true;
 489         }
 490         return false;
 491 }
 492
 493 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)
 494 {
 495         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 496         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 497         struct drm_device *dev = intel_dig_port->base.base.dev;
 498         struct drm_i915_private *dev_priv = to_i915(dev);
 499         struct intel_connector *intel_connector;
 500         struct drm_connector *connector;
 501         enum pipe pipe;
 502         int ret;
 503
 504         intel_connector = intel_connector_alloc();
 505         if (!intel_connector)
 506                 return NULL;
 507
 508         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 509         intel_connector->mst_port = intel_dp;
 510         intel_connector->port = port;
 511         drm_dp_mst_get_port_malloc(port);
 512
 513         connector = &intel_connector->base;
 514         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 515                                  DRM_MODE_CONNECTOR_DisplayPort);
 516         if (ret) {
 517                 intel_connector_free(intel_connector);
 518                 return NULL;
 519         }
 520
 521         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 522
 523         for_each_pipe(dev_priv, pipe) {
 524                 struct drm_encoder *enc =
 525                         &intel_dp->mst_encoders[pipe]->base.base;
 526
 527                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 528                 if (ret)
 529                         goto err;
 530         }
 531
 532         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 533         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 534
 535         ret = drm_connector_set_path_property(connector, pathprop);
 536         if (ret)
 537                 goto err;
 538
 539         intel_attach_force_audio_property(connector);
 540         intel_attach_broadcast_rgb_property(connector);
 541         drm_connector_attach_max_bpc_property(connector, 6, 12);
 542
 543         return connector;
 544
 545 err:
 546         drm_connector_cleanup(connector);
 547         return NULL;
 548 }
 549
 550 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 551 {
 552         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 553
 554         if (dev_priv->fbdev)
 555                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 556                                                 connector);
 557
 558         drm_connector_register(connector);
 559 }
 560
 561 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 562                                            struct drm_connector *connector)
 563 {
 564         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 565
 566         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 567         drm_connector_unregister(connector);
 568
 569         if (dev_priv->fbdev)
 570                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 571                                                    connector);
 572
 573         drm_connector_put(connector);
 574 }
 575
 576 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 577         .add_connector = intel_dp_add_mst_connector,
 578         .register_connector = intel_dp_register_mst_connector,
 579         .destroy_connector = intel_dp_destroy_mst_connector,
 580 };
 581
 582 static struct intel_dp_mst_encoder *
 583 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 584 {
 585         struct intel_dp_mst_encoder *intel_mst;
 586         struct intel_encoder *intel_encoder;
 587         struct drm_device *dev = intel_dig_port->base.base.dev;
 588
 589         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 590
 591         if (!intel_mst)
 592                 return NULL;
 593
 594         intel_mst->pipe = pipe;
 595         intel_encoder = &intel_mst->base;
 596         intel_mst->primary = intel_dig_port;
 597
 598         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 599                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 600
 601         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 602         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 603         intel_encoder->port = intel_dig_port->base.port;
 604         intel_encoder->crtc_mask = 0x7;
 605         intel_encoder->cloneable = 0;
 606
 607         intel_encoder->compute_config = intel_dp_mst_compute_config;
 608         intel_encoder->disable = intel_mst_disable_dp;
 609         intel_encoder->post_disable = intel_mst_post_disable_dp;
 610         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 611         intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
 612         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 613         intel_encoder->enable = intel_mst_enable_dp;
 614         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 615         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 616
 617         return intel_mst;
 618
 619 }
 620
 621 static bool
 622 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 623 {
 624         struct intel_dp *intel_dp = &intel_dig_port->dp;
 625         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 626         enum pipe pipe;
 627
 628         for_each_pipe(dev_priv, pipe)
 629                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 630         return true;
 631 }
 632
 633 int
 634 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 635 {
 636         struct intel_dp *intel_dp = &intel_dig_port->dp;
 637         struct drm_device *dev = intel_dig_port->base.base.dev;
 638         int ret;
 639
 640         intel_dp->can_mst = true;
 641         intel_dp->mst_mgr.cbs = &mst_cbs;
 642
 643         /* create encoders */
 644         intel_dp_create_fake_mst_encoders(intel_dig_port);
 645         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
 646                                            &intel_dp->aux, 16, 3, conn_base_id);
 647         if (ret) {
 648                 intel_dp->can_mst = false;
 649                 return ret;
 650         }
 651         return 0;
 652 }
 653
 654 void
 655 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 656 {
 657         struct intel_dp *intel_dp = &intel_dig_port->dp;
 658
 659         if (!intel_dp->can_mst)
 660                 return;
 661
 662         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 663         /* encoders will get killed by normal cleanup */
 664 }