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

DEFINITIONS

1. intel_dp_mst_compute_link_config
2. intel_dp_mst_compute_config
3. intel_dp_mst_atomic_check
4. intel_mst_disable_dp
5. intel_mst_post_disable_dp
6. intel_mst_pre_pll_enable_dp
7. intel_mst_post_pll_disable_dp
8. intel_mst_pre_enable_dp
9. intel_mst_enable_dp
10. intel_dp_mst_enc_get_hw_state
11. intel_dp_mst_enc_get_config
12. intel_dp_mst_get_ddc_modes
13. intel_dp_mst_detect
14. intel_dp_mst_get_modes
15. intel_dp_mst_mode_valid
16. intel_mst_atomic_best_encoder
17. intel_dp_mst_encoder_destroy
18. intel_dp_mst_get_hw_state
19. intel_dp_add_mst_connector
20. intel_dp_register_mst_connector
21. intel_dp_destroy_mst_connector
22. intel_dp_create_fake_mst_encoder
23. intel_dp_create_fake_mst_encoders
24. intel_dp_mst_encoder_active_links
25. intel_dp_mst_encoder_init
26. intel_dp_mst_encoder_cleanup

   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->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, crtc_state->fec_enable);
  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         /*
 132          * FIXME: If all the streams can't fit into the link with
 133          * their current pipe_bpp we should reduce pipe_bpp across
 134          * the board until things start to fit. Until then we
 135          * limit to <= 8bpc since that's what was hardcoded for all
 136          * MST streams previously. This hack should be removed once
 137          * we have the proper retry logic in place.
 138          */
 139         limits.max_bpp = min(pipe_config->pipe_bpp, 24);
 140 
 141         intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
 142 
 143         ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
 144                                                conn_state, &limits);
 145         if (ret)
 146                 return ret;
 147 
 148         pipe_config->limited_color_range =
 149                 intel_dp_limited_color_range(pipe_config, conn_state);
 150 
 151         if (IS_GEN9_LP(dev_priv))
 152                 pipe_config->lane_lat_optim_mask =
 153                         bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
 154 
 155         intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
 156 
 157         return 0;
 158 }
 159 
 160 static int
 161 intel_dp_mst_atomic_check(struct drm_connector *connector,
 162                           struct drm_atomic_state *state)
 163 {
 164         struct drm_connector_state *new_conn_state =
 165                 drm_atomic_get_new_connector_state(state, connector);
 166         struct drm_connector_state *old_conn_state =
 167                 drm_atomic_get_old_connector_state(state, connector);
 168         struct intel_connector *intel_connector =
 169                 to_intel_connector(connector);
 170         struct drm_crtc *new_crtc = new_conn_state->crtc;
 171         struct drm_crtc_state *crtc_state;
 172         struct drm_dp_mst_topology_mgr *mgr;
 173         int ret;
 174 
 175         ret = intel_digital_connector_atomic_check(connector, state);
 176         if (ret)
 177                 return ret;
 178 
 179         if (!old_conn_state->crtc)
 180                 return 0;
 181 
 182         /* We only want to free VCPI if this state disables the CRTC on this
 183          * connector
 184          */
 185         if (new_crtc) {
 186                 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
 187 
 188                 if (!crtc_state ||
 189                     !drm_atomic_crtc_needs_modeset(crtc_state) ||
 190                     crtc_state->enable)
 191                         return 0;
 192         }
 193 
 194         mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
 195         ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
 196                                                intel_connector->port);
 197 
 198         return ret;
 199 }
 200 
 201 static void intel_mst_disable_dp(struct intel_encoder *encoder,
 202                                  const struct intel_crtc_state *old_crtc_state,
 203                                  const struct drm_connector_state *old_conn_state)
 204 {
 205         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 206         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 207         struct intel_dp *intel_dp = &intel_dig_port->dp;
 208         struct intel_connector *connector =
 209                 to_intel_connector(old_conn_state->connector);
 210         int ret;
 211 
 212         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 213 
 214         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
 215 
 216         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 217         if (ret) {
 218                 DRM_ERROR("failed to update payload %d\n", ret);
 219         }
 220         if (old_crtc_state->has_audio)
 221                 intel_audio_codec_disable(encoder,
 222                                           old_crtc_state, old_conn_state);
 223 }
 224 
 225 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
 226                                       const struct intel_crtc_state *old_crtc_state,
 227                                       const struct drm_connector_state *old_conn_state)
 228 {
 229         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 230         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 231         struct intel_dp *intel_dp = &intel_dig_port->dp;
 232         struct intel_connector *connector =
 233                 to_intel_connector(old_conn_state->connector);
 234 
 235         intel_ddi_disable_pipe_clock(old_crtc_state);
 236 
 237         /* this can fail */
 238         drm_dp_check_act_status(&intel_dp->mst_mgr);
 239         /* and this can also fail */
 240         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 241 
 242         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
 243 
 244         /*
 245          * Power down mst path before disabling the port, otherwise we end
 246          * up getting interrupts from the sink upon detecting link loss.
 247          */
 248         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
 249                                      false);
 250 
 251         intel_dp->active_mst_links--;
 252 
 253         intel_mst->connector = NULL;
 254         if (intel_dp->active_mst_links == 0) {
 255                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
 256                 intel_dig_port->base.post_disable(&intel_dig_port->base,
 257                                                   old_crtc_state, NULL);
 258         }
 259 
 260         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 261 }
 262 
 263 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
 264                                         const struct intel_crtc_state *pipe_config,
 265                                         const struct drm_connector_state *conn_state)
 266 {
 267         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 268         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 269         struct intel_dp *intel_dp = &intel_dig_port->dp;
 270 
 271         if (intel_dp->active_mst_links == 0)
 272                 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
 273                                                     pipe_config, NULL);
 274 }
 275 
 276 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
 277                                           const struct intel_crtc_state *old_crtc_state,
 278                                           const struct drm_connector_state *old_conn_state)
 279 {
 280         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 281         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 282         struct intel_dp *intel_dp = &intel_dig_port->dp;
 283 
 284         if (intel_dp->active_mst_links == 0)
 285                 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
 286                                                       old_crtc_state,
 287                                                       old_conn_state);
 288 }
 289 
 290 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 291                                     const struct intel_crtc_state *pipe_config,
 292                                     const struct drm_connector_state *conn_state)
 293 {
 294         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 295         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 296         struct intel_dp *intel_dp = &intel_dig_port->dp;
 297         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 298         enum port port = intel_dig_port->base.port;
 299         struct intel_connector *connector =
 300                 to_intel_connector(conn_state->connector);
 301         int ret;
 302         u32 temp;
 303 
 304         /* MST encoders are bound to a crtc, not to a connector,
 305          * force the mapping here for get_hw_state.
 306          */
 307         connector->encoder = encoder;
 308         intel_mst->connector = connector;
 309 
 310         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 311 
 312         if (intel_dp->active_mst_links == 0)
 313                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 314 
 315         drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
 316 
 317         if (intel_dp->active_mst_links == 0)
 318                 intel_dig_port->base.pre_enable(&intel_dig_port->base,
 319                                                 pipe_config, NULL);
 320 
 321         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
 322                                        connector->port,
 323                                        pipe_config->pbn,
 324                                        pipe_config->dp_m_n.tu);
 325         if (!ret)
 326                 DRM_ERROR("failed to allocate vcpi\n");
 327 
 328         intel_dp->active_mst_links++;
 329         temp = I915_READ(DP_TP_STATUS(port));
 330         I915_WRITE(DP_TP_STATUS(port), temp);
 331 
 332         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 333 
 334         intel_ddi_enable_pipe_clock(pipe_config);
 335 }
 336 
 337 static void intel_mst_enable_dp(struct intel_encoder *encoder,
 338                                 const struct intel_crtc_state *pipe_config,
 339                                 const struct drm_connector_state *conn_state)
 340 {
 341         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 342         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 343         struct intel_dp *intel_dp = &intel_dig_port->dp;
 344         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 345         enum port port = intel_dig_port->base.port;
 346 
 347         DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 348 
 349         if (intel_de_wait_for_set(dev_priv, DP_TP_STATUS(port),
 350                                   DP_TP_STATUS_ACT_SENT, 1))
 351                 DRM_ERROR("Timed out waiting for ACT sent\n");
 352 
 353         drm_dp_check_act_status(&intel_dp->mst_mgr);
 354 
 355         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
 356         if (pipe_config->has_audio)
 357                 intel_audio_codec_enable(encoder, pipe_config, conn_state);
 358 }
 359 
 360 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
 361                                       enum pipe *pipe)
 362 {
 363         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 364         *pipe = intel_mst->pipe;
 365         if (intel_mst->connector)
 366                 return true;
 367         return false;
 368 }
 369 
 370 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 371                                         struct intel_crtc_state *pipe_config)
 372 {
 373         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
 374         struct intel_digital_port *intel_dig_port = intel_mst->primary;
 375 
 376         intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 377 }
 378 
 379 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 380 {
 381         struct intel_connector *intel_connector = to_intel_connector(connector);
 382         struct intel_dp *intel_dp = intel_connector->mst_port;
 383         struct edid *edid;
 384         int ret;
 385 
 386         if (drm_connector_is_unregistered(connector))
 387                 return intel_connector_update_modes(connector, NULL);
 388 
 389         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
 390         ret = intel_connector_update_modes(connector, edid);
 391         kfree(edid);
 392 
 393         return ret;
 394 }
 395 
 396 static enum drm_connector_status
 397 intel_dp_mst_detect(struct drm_connector *connector, bool force)
 398 {
 399         struct intel_connector *intel_connector = to_intel_connector(connector);
 400         struct intel_dp *intel_dp = intel_connector->mst_port;
 401 
 402         if (drm_connector_is_unregistered(connector))
 403                 return connector_status_disconnected;
 404         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
 405                                       intel_connector->port);
 406 }
 407 
 408 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 409         .detect = intel_dp_mst_detect,
 410         .fill_modes = drm_helper_probe_single_connector_modes,
 411         .atomic_get_property = intel_digital_connector_atomic_get_property,
 412         .atomic_set_property = intel_digital_connector_atomic_set_property,
 413         .late_register = intel_connector_register,
 414         .early_unregister = intel_connector_unregister,
 415         .destroy = intel_connector_destroy,
 416         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 417         .atomic_duplicate_state = intel_digital_connector_duplicate_state,
 418 };
 419 
 420 static int intel_dp_mst_get_modes(struct drm_connector *connector)
 421 {
 422         return intel_dp_mst_get_ddc_modes(connector);
 423 }
 424 
 425 static enum drm_mode_status
 426 intel_dp_mst_mode_valid(struct drm_connector *connector,
 427                         struct drm_display_mode *mode)
 428 {
 429         struct intel_connector *intel_connector = to_intel_connector(connector);
 430         struct intel_dp *intel_dp = intel_connector->mst_port;
 431         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 432         int max_rate, mode_rate, max_lanes, max_link_clock;
 433 
 434         if (drm_connector_is_unregistered(connector))
 435                 return MODE_ERROR;
 436 
 437         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 438                 return MODE_NO_DBLESCAN;
 439 
 440         max_link_clock = intel_dp_max_link_rate(intel_dp);
 441         max_lanes = intel_dp_max_lane_count(intel_dp);
 442 
 443         max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 444         mode_rate = intel_dp_link_required(mode->clock, 18);
 445 
 446         /* TODO - validate mode against available PBN for link */
 447         if (mode->clock < 10000)
 448                 return MODE_CLOCK_LOW;
 449 
 450         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 451                 return MODE_H_ILLEGAL;
 452 
 453         if (mode_rate > max_rate || mode->clock > max_dotclk)
 454                 return MODE_CLOCK_HIGH;
 455 
 456         return MODE_OK;
 457 }
 458 
 459 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
 460                                                          struct drm_connector_state *state)
 461 {
 462         struct intel_connector *intel_connector = to_intel_connector(connector);
 463         struct intel_dp *intel_dp = intel_connector->mst_port;
 464         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
 465 
 466         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
 467 }
 468 
 469 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
 470         .get_modes = intel_dp_mst_get_modes,
 471         .mode_valid = intel_dp_mst_mode_valid,
 472         .atomic_best_encoder = intel_mst_atomic_best_encoder,
 473         .atomic_check = intel_dp_mst_atomic_check,
 474 };
 475 
 476 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
 477 {
 478         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
 479 
 480         drm_encoder_cleanup(encoder);
 481         kfree(intel_mst);
 482 }
 483 
 484 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
 485         .destroy = intel_dp_mst_encoder_destroy,
 486 };
 487 
 488 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 489 {
 490         if (connector->encoder && connector->base.state->crtc) {
 491                 enum pipe pipe;
 492                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
 493                         return false;
 494                 return true;
 495         }
 496         return false;
 497 }
 498 
 499 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)
 500 {
 501         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
 502         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
 503         struct drm_device *dev = intel_dig_port->base.base.dev;
 504         struct drm_i915_private *dev_priv = to_i915(dev);
 505         struct intel_connector *intel_connector;
 506         struct drm_connector *connector;
 507         enum pipe pipe;
 508         int ret;
 509 
 510         intel_connector = intel_connector_alloc();
 511         if (!intel_connector)
 512                 return NULL;
 513 
 514         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
 515         intel_connector->mst_port = intel_dp;
 516         intel_connector->port = port;
 517         drm_dp_mst_get_port_malloc(port);
 518 
 519         connector = &intel_connector->base;
 520         ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
 521                                  DRM_MODE_CONNECTOR_DisplayPort);
 522         if (ret) {
 523                 intel_connector_free(intel_connector);
 524                 return NULL;
 525         }
 526 
 527         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
 528 
 529         for_each_pipe(dev_priv, pipe) {
 530                 struct drm_encoder *enc =
 531                         &intel_dp->mst_encoders[pipe]->base.base;
 532 
 533                 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
 534                 if (ret)
 535                         goto err;
 536         }
 537 
 538         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
 539         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
 540 
 541         ret = drm_connector_set_path_property(connector, pathprop);
 542         if (ret)
 543                 goto err;
 544 
 545         intel_attach_force_audio_property(connector);
 546         intel_attach_broadcast_rgb_property(connector);
 547 
 548         /*
 549          * Reuse the prop from the SST connector because we're
 550          * not allowed to create new props after device registration.
 551          */
 552         connector->max_bpc_property =
 553                 intel_dp->attached_connector->base.max_bpc_property;
 554         if (connector->max_bpc_property)
 555                 drm_connector_attach_max_bpc_property(connector, 6, 12);
 556 
 557         return connector;
 558 
 559 err:
 560         drm_connector_cleanup(connector);
 561         return NULL;
 562 }
 563 
 564 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 565 {
 566         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 567 
 568         if (dev_priv->fbdev)
 569                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
 570                                                 connector);
 571 
 572         drm_connector_register(connector);
 573 }
 574 
 575 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 576                                            struct drm_connector *connector)
 577 {
 578         struct drm_i915_private *dev_priv = to_i915(connector->dev);
 579 
 580         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 581         drm_connector_unregister(connector);
 582 
 583         if (dev_priv->fbdev)
 584                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
 585                                                    connector);
 586 
 587         drm_connector_put(connector);
 588 }
 589 
 590 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 591         .add_connector = intel_dp_add_mst_connector,
 592         .register_connector = intel_dp_register_mst_connector,
 593         .destroy_connector = intel_dp_destroy_mst_connector,
 594 };
 595 
 596 static struct intel_dp_mst_encoder *
 597 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
 598 {
 599         struct intel_dp_mst_encoder *intel_mst;
 600         struct intel_encoder *intel_encoder;
 601         struct drm_device *dev = intel_dig_port->base.base.dev;
 602 
 603         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
 604 
 605         if (!intel_mst)
 606                 return NULL;
 607 
 608         intel_mst->pipe = pipe;
 609         intel_encoder = &intel_mst->base;
 610         intel_mst->primary = intel_dig_port;
 611 
 612         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
 613                          DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
 614 
 615         intel_encoder->type = INTEL_OUTPUT_DP_MST;
 616         intel_encoder->power_domain = intel_dig_port->base.power_domain;
 617         intel_encoder->port = intel_dig_port->base.port;
 618         intel_encoder->crtc_mask = 0x7;
 619         intel_encoder->cloneable = 0;
 620 
 621         intel_encoder->compute_config = intel_dp_mst_compute_config;
 622         intel_encoder->disable = intel_mst_disable_dp;
 623         intel_encoder->post_disable = intel_mst_post_disable_dp;
 624         intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
 625         intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
 626         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
 627         intel_encoder->enable = intel_mst_enable_dp;
 628         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
 629         intel_encoder->get_config = intel_dp_mst_enc_get_config;
 630 
 631         return intel_mst;
 632 
 633 }
 634 
 635 static bool
 636 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 637 {
 638         struct intel_dp *intel_dp = &intel_dig_port->dp;
 639         struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
 640         enum pipe pipe;
 641 
 642         for_each_pipe(dev_priv, pipe)
 643                 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
 644         return true;
 645 }
 646 
 647 int
 648 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
 649 {
 650         return intel_dig_port->dp.active_mst_links;
 651 }
 652 
 653 int
 654 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 655 {
 656         struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev);
 657         struct intel_dp *intel_dp = &intel_dig_port->dp;
 658         enum port port = intel_dig_port->base.port;
 659         int ret;
 660 
 661         if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
 662                 return 0;
 663 
 664         if (INTEL_GEN(i915) < 12 && port == PORT_A)
 665                 return 0;
 666 
 667         if (INTEL_GEN(i915) < 11 && port == PORT_E)
 668                 return 0;
 669 
 670         intel_dp->mst_mgr.cbs = &mst_cbs;
 671 
 672         /* create encoders */
 673         intel_dp_create_fake_mst_encoders(intel_dig_port);
 674         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
 675                                            &intel_dp->aux, 16, 3, conn_base_id);
 676         if (ret)
 677                 return ret;
 678 
 679         intel_dp->can_mst = true;
 680 
 681         return 0;
 682 }
 683 
 684 void
 685 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
 686 {
 687         struct intel_dp *intel_dp = &intel_dig_port->dp;
 688 
 689         if (!intel_dp->can_mst)
 690                 return;
 691 
 692         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
 693         /* encoders will get killed by normal cleanup */
 694 }