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  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/drmP.h>
  27. #include "i915_drv.h"
  28. #include "intel_drv.h"
  29. #include <drm/drm_atomic_helper.h>
  30. #include <drm/drm_crtc_helper.h>
  31. #include <drm/drm_edid.h>
  32.  
  33. static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
  34.                                         struct intel_crtc_state *pipe_config)
  35. {
  36.         struct drm_device *dev = encoder->base.dev;
  37.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  38.         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  39.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  40.         struct drm_atomic_state *state;
  41.         int bpp, i;
  42.         int lane_count, slots;
  43.         const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
  44.         struct drm_connector *drm_connector;
  45.         struct intel_connector *connector, *found = NULL;
  46.         struct drm_connector_state *connector_state;
  47.         int mst_pbn;
  48.  
  49.         pipe_config->dp_encoder_is_mst = true;
  50.         pipe_config->has_pch_encoder = false;
  51.         pipe_config->has_dp_encoder = true;
  52.         bpp = 24;
  53.         /*
  54.          * for MST we always configure max link bw - the spec doesn't
  55.          * seem to suggest we should do otherwise.
  56.          */
  57.         lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
  58.  
  59.  
  60.         pipe_config->lane_count = lane_count;
  61.  
  62.         pipe_config->pipe_bpp = 24;
  63.         pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
  64.  
  65.         state = pipe_config->base.state;
  66.  
  67.         for_each_connector_in_state(state, drm_connector, connector_state, i) {
  68.                 connector = to_intel_connector(drm_connector);
  69.  
  70.                 if (connector_state->best_encoder == &encoder->base) {
  71.                         found = connector;
  72.                         break;
  73.                 }
  74.         }
  75.  
  76.         if (!found) {
  77.                 DRM_ERROR("can't find connector\n");
  78.                 return false;
  79.         }
  80.  
  81.         mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
  82.  
  83.         pipe_config->pbn = mst_pbn;
  84.         slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
  85.  
  86.         intel_link_compute_m_n(bpp, lane_count,
  87.                                adjusted_mode->crtc_clock,
  88.                                pipe_config->port_clock,
  89.                                &pipe_config->dp_m_n);
  90.  
  91.         pipe_config->dp_m_n.tu = slots;
  92.  
  93.         if (IS_HASWELL(dev) || IS_BROADWELL(dev))
  94.                 hsw_dp_set_ddi_pll_sel(pipe_config);
  95.  
  96.         return true;
  97.  
  98. }
  99.  
  100. static void intel_mst_disable_dp(struct intel_encoder *encoder)
  101. {
  102.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  103.         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  104.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  105.         int ret;
  106.  
  107.         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
  108.  
  109.         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
  110.  
  111.         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
  112.         if (ret) {
  113.                 DRM_ERROR("failed to update payload %d\n", ret);
  114.         }
  115. }
  116.  
  117. static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
  118. {
  119.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  120.         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  121.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  122.  
  123.         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
  124.  
  125.         /* this can fail */
  126.         drm_dp_check_act_status(&intel_dp->mst_mgr);
  127.         /* and this can also fail */
  128.         drm_dp_update_payload_part2(&intel_dp->mst_mgr);
  129.  
  130.         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
  131.  
  132.         intel_dp->active_mst_links--;
  133.         intel_mst->port = NULL;
  134.         if (intel_dp->active_mst_links == 0) {
  135.                 intel_dig_port->base.post_disable(&intel_dig_port->base);
  136.                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
  137.         }
  138. }
  139.  
  140. static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
  141. {
  142.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  143.         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  144.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  145.         struct drm_device *dev = encoder->base.dev;
  146.         struct drm_i915_private *dev_priv = dev->dev_private;
  147.         enum port port = intel_dig_port->port;
  148.         int ret;
  149.         uint32_t temp;
  150.         struct intel_connector *found = NULL, *connector;
  151.         int slots;
  152.         struct drm_crtc *crtc = encoder->base.crtc;
  153.         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  154.  
  155.         for_each_intel_connector(dev, connector) {
  156.                 if (connector->base.state->best_encoder == &encoder->base) {
  157.                         found = connector;
  158.                         break;
  159.                 }
  160.         }
  161.  
  162.         if (!found) {
  163.                 DRM_ERROR("can't find connector\n");
  164.                 return;
  165.         }
  166.  
  167.         /* MST encoders are bound to a crtc, not to a connector,
  168.          * force the mapping here for get_hw_state.
  169.          */
  170.         found->encoder = encoder;
  171.  
  172.         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
  173.         intel_mst->port = found->port;
  174.  
  175.         if (intel_dp->active_mst_links == 0) {
  176.                 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
  177.  
  178.                 intel_dp_set_link_params(intel_dp, intel_crtc->config);
  179.  
  180.                 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
  181.  
  182.                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
  183.  
  184.                 intel_dp_start_link_train(intel_dp);
  185.                 intel_dp_stop_link_train(intel_dp);
  186.         }
  187.  
  188.         ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
  189.                                        intel_mst->port,
  190.                                        intel_crtc->config->pbn, &slots);
  191.         if (ret == false) {
  192.                 DRM_ERROR("failed to allocate vcpi\n");
  193.                 return;
  194.         }
  195.  
  196.  
  197.         intel_dp->active_mst_links++;
  198.         temp = I915_READ(DP_TP_STATUS(port));
  199.         I915_WRITE(DP_TP_STATUS(port), temp);
  200.  
  201.         ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
  202. }
  203.  
  204. static void intel_mst_enable_dp(struct intel_encoder *encoder)
  205. {
  206.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  207.         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  208.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  209.         struct drm_device *dev = intel_dig_port->base.base.dev;
  210.         struct drm_i915_private *dev_priv = dev->dev_private;
  211.         enum port port = intel_dig_port->port;
  212.         int ret;
  213.  
  214.         DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
  215.  
  216.         if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
  217.                      1))
  218.                 DRM_ERROR("Timed out waiting for ACT sent\n");
  219.  
  220.         ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
  221.  
  222.         ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
  223. }
  224.  
  225. static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
  226.                                       enum pipe *pipe)
  227. {
  228.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  229.         *pipe = intel_mst->pipe;
  230.         if (intel_mst->port)
  231.                 return true;
  232.         return false;
  233. }
  234.  
  235. static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
  236.                                         struct intel_crtc_state *pipe_config)
  237. {
  238.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
  239.         struct intel_digital_port *intel_dig_port = intel_mst->primary;
  240.         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
  241.         struct drm_device *dev = encoder->base.dev;
  242.         struct drm_i915_private *dev_priv = dev->dev_private;
  243.         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
  244.         u32 temp, flags = 0;
  245.  
  246.         pipe_config->has_dp_encoder = true;
  247.  
  248.         temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
  249.         if (temp & TRANS_DDI_PHSYNC)
  250.                 flags |= DRM_MODE_FLAG_PHSYNC;
  251.         else
  252.                 flags |= DRM_MODE_FLAG_NHSYNC;
  253.         if (temp & TRANS_DDI_PVSYNC)
  254.                 flags |= DRM_MODE_FLAG_PVSYNC;
  255.         else
  256.                 flags |= DRM_MODE_FLAG_NVSYNC;
  257.  
  258.         switch (temp & TRANS_DDI_BPC_MASK) {
  259.         case TRANS_DDI_BPC_6:
  260.                 pipe_config->pipe_bpp = 18;
  261.                 break;
  262.         case TRANS_DDI_BPC_8:
  263.                 pipe_config->pipe_bpp = 24;
  264.                 break;
  265.         case TRANS_DDI_BPC_10:
  266.                 pipe_config->pipe_bpp = 30;
  267.                 break;
  268.         case TRANS_DDI_BPC_12:
  269.                 pipe_config->pipe_bpp = 36;
  270.                 break;
  271.         default:
  272.                 break;
  273.         }
  274.         pipe_config->base.adjusted_mode.flags |= flags;
  275.  
  276.         pipe_config->lane_count =
  277.                 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
  278.  
  279.         intel_dp_get_m_n(crtc, pipe_config);
  280.  
  281.         intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
  282. }
  283.  
  284. static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
  285. {
  286.         struct intel_connector *intel_connector = to_intel_connector(connector);
  287.         struct intel_dp *intel_dp = intel_connector->mst_port;
  288.         struct edid *edid;
  289.         int ret;
  290.  
  291.         edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
  292.         if (!edid)
  293.                 return 0;
  294.  
  295.         ret = intel_connector_update_modes(connector, edid);
  296.         kfree(edid);
  297.  
  298.         return ret;
  299. }
  300.  
  301. static enum drm_connector_status
  302. intel_dp_mst_detect(struct drm_connector *connector, bool force)
  303. {
  304.         struct intel_connector *intel_connector = to_intel_connector(connector);
  305.         struct intel_dp *intel_dp = intel_connector->mst_port;
  306.  
  307.         return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
  308. }
  309.  
  310. static int
  311. intel_dp_mst_set_property(struct drm_connector *connector,
  312.                           struct drm_property *property,
  313.                           uint64_t val)
  314. {
  315.         return 0;
  316. }
  317.  
  318. static void
  319. intel_dp_mst_connector_destroy(struct drm_connector *connector)
  320. {
  321.         struct intel_connector *intel_connector = to_intel_connector(connector);
  322.  
  323.         if (!IS_ERR_OR_NULL(intel_connector->edid))
  324.                 kfree(intel_connector->edid);
  325.  
  326.         drm_connector_cleanup(connector);
  327.         kfree(connector);
  328. }
  329.  
  330. static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
  331.         .dpms = drm_atomic_helper_connector_dpms,
  332.         .detect = intel_dp_mst_detect,
  333.         .fill_modes = drm_helper_probe_single_connector_modes,
  334.         .set_property = intel_dp_mst_set_property,
  335.         .atomic_get_property = intel_connector_atomic_get_property,
  336.         .destroy = intel_dp_mst_connector_destroy,
  337.         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  338.         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  339. };
  340.  
  341. static int intel_dp_mst_get_modes(struct drm_connector *connector)
  342. {
  343.         return intel_dp_mst_get_ddc_modes(connector);
  344. }
  345.  
  346. static enum drm_mode_status
  347. intel_dp_mst_mode_valid(struct drm_connector *connector,
  348.                         struct drm_display_mode *mode)
  349. {
  350.         /* TODO - validate mode against available PBN for link */
  351.         if (mode->clock < 10000)
  352.                 return MODE_CLOCK_LOW;
  353.  
  354.         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
  355.                 return MODE_H_ILLEGAL;
  356.  
  357.         return MODE_OK;
  358. }
  359.  
  360. static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
  361.                                                          struct drm_connector_state *state)
  362. {
  363.         struct intel_connector *intel_connector = to_intel_connector(connector);
  364.         struct intel_dp *intel_dp = intel_connector->mst_port;
  365.         struct intel_crtc *crtc = to_intel_crtc(state->crtc);
  366.  
  367.         return &intel_dp->mst_encoders[crtc->pipe]->base.base;
  368. }
  369.  
  370. static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
  371. {
  372.         struct intel_connector *intel_connector = to_intel_connector(connector);
  373.         struct intel_dp *intel_dp = intel_connector->mst_port;
  374.         return &intel_dp->mst_encoders[0]->base.base;
  375. }
  376.  
  377. static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
  378.         .get_modes = intel_dp_mst_get_modes,
  379.         .mode_valid = intel_dp_mst_mode_valid,
  380.         .atomic_best_encoder = intel_mst_atomic_best_encoder,
  381.         .best_encoder = intel_mst_best_encoder,
  382. };
  383.  
  384. static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
  385. {
  386.         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
  387.  
  388.         drm_encoder_cleanup(encoder);
  389.         kfree(intel_mst);
  390. }
  391.  
  392. static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
  393.         .destroy = intel_dp_mst_encoder_destroy,
  394. };
  395.  
  396. static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
  397. {
  398.         if (connector->encoder && connector->base.state->crtc) {
  399.                 enum pipe pipe;
  400.                 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
  401.                         return false;
  402.                 return true;
  403.         }
  404.         return false;
  405. }
  406.  
  407. static void intel_connector_add_to_fbdev(struct intel_connector *connector)
  408. {
  409. #ifdef CONFIG_DRM_FBDEV_EMULATION
  410.         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
  411.  
  412.         if (dev_priv->fbdev)
  413.                 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
  414.                                                 &connector->base);
  415. #endif
  416. }
  417.  
  418. static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
  419. {
  420. #ifdef CONFIG_DRM_FBDEV_EMULATION
  421.         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
  422.  
  423.         if (dev_priv->fbdev)
  424.                 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
  425.                                                    &connector->base);
  426. #endif
  427. }
  428.  
  429. 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)
  430. {
  431.         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
  432.         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
  433.         struct drm_device *dev = intel_dig_port->base.base.dev;
  434.         struct intel_connector *intel_connector;
  435.         struct drm_connector *connector;
  436.         int i;
  437.  
  438.         intel_connector = intel_connector_alloc();
  439.         if (!intel_connector)
  440.                 return NULL;
  441.  
  442.         connector = &intel_connector->base;
  443.         drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
  444.         drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
  445.  
  446.         intel_connector->unregister = intel_connector_unregister;
  447.         intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
  448.         intel_connector->mst_port = intel_dp;
  449.         intel_connector->port = port;
  450.  
  451.         for (i = PIPE_A; i <= PIPE_C; i++) {
  452.                 drm_mode_connector_attach_encoder(&intel_connector->base,
  453.                                                   &intel_dp->mst_encoders[i]->base.base);
  454.         }
  455.         intel_dp_add_properties(intel_dp, connector);
  456.  
  457.         drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
  458.         drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
  459.  
  460.         drm_mode_connector_set_path_property(connector, pathprop);
  461.         return connector;
  462. }
  463.  
  464. static void intel_dp_register_mst_connector(struct drm_connector *connector)
  465. {
  466.         struct intel_connector *intel_connector = to_intel_connector(connector);
  467.         struct drm_device *dev = connector->dev;
  468.         drm_modeset_lock_all(dev);
  469.         intel_connector_add_to_fbdev(intel_connector);
  470.         drm_modeset_unlock_all(dev);
  471.         drm_connector_register(&intel_connector->base);
  472. }
  473.  
  474. static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
  475.                                            struct drm_connector *connector)
  476. {
  477.         struct intel_connector *intel_connector = to_intel_connector(connector);
  478.         struct drm_device *dev = connector->dev;
  479.  
  480.         intel_connector->unregister(intel_connector);
  481.  
  482.         /* need to nuke the connector */
  483.         drm_modeset_lock_all(dev);
  484.         if (connector->state->crtc) {
  485.                 struct drm_mode_set set;
  486.                 int ret;
  487.  
  488.                 memset(&set, 0, sizeof(set));
  489.                 set.crtc = connector->state->crtc,
  490.  
  491.                 ret = drm_atomic_helper_set_config(&set);
  492.  
  493.                 WARN(ret, "Disabling mst crtc failed with %i\n", ret);
  494.         }
  495.  
  496.         intel_connector_remove_from_fbdev(intel_connector);
  497.         drm_connector_cleanup(connector);
  498.         drm_modeset_unlock_all(dev);
  499.  
  500.         kfree(intel_connector);
  501.         DRM_DEBUG_KMS("\n");
  502. }
  503.  
  504. static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
  505. {
  506.         struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
  507.         struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
  508.         struct drm_device *dev = intel_dig_port->base.base.dev;
  509.  
  510.         drm_kms_helper_hotplug_event(dev);
  511. }
  512.  
  513. static const struct drm_dp_mst_topology_cbs mst_cbs = {
  514.         .add_connector = intel_dp_add_mst_connector,
  515.         .register_connector = intel_dp_register_mst_connector,
  516.         .destroy_connector = intel_dp_destroy_mst_connector,
  517.         .hotplug = intel_dp_mst_hotplug,
  518. };
  519.  
  520. static struct intel_dp_mst_encoder *
  521. intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
  522. {
  523.         struct intel_dp_mst_encoder *intel_mst;
  524.         struct intel_encoder *intel_encoder;
  525.         struct drm_device *dev = intel_dig_port->base.base.dev;
  526.  
  527.         intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
  528.  
  529.         if (!intel_mst)
  530.                 return NULL;
  531.  
  532.         intel_mst->pipe = pipe;
  533.         intel_encoder = &intel_mst->base;
  534.         intel_mst->primary = intel_dig_port;
  535.  
  536.         drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
  537.                          DRM_MODE_ENCODER_DPMST, NULL);
  538.  
  539.         intel_encoder->type = INTEL_OUTPUT_DP_MST;
  540.         intel_encoder->crtc_mask = 0x7;
  541.         intel_encoder->cloneable = 0;
  542.  
  543.         intel_encoder->compute_config = intel_dp_mst_compute_config;
  544.         intel_encoder->disable = intel_mst_disable_dp;
  545.         intel_encoder->post_disable = intel_mst_post_disable_dp;
  546.         intel_encoder->pre_enable = intel_mst_pre_enable_dp;
  547.         intel_encoder->enable = intel_mst_enable_dp;
  548.         intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
  549.         intel_encoder->get_config = intel_dp_mst_enc_get_config;
  550.  
  551.         return intel_mst;
  552.  
  553. }
  554.  
  555. static bool
  556. intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
  557. {
  558.         int i;
  559.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  560.  
  561.         for (i = PIPE_A; i <= PIPE_C; i++)
  562.                 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
  563.         return true;
  564. }
  565.  
  566. int
  567. intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
  568. {
  569.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  570.         struct drm_device *dev = intel_dig_port->base.base.dev;
  571.         int ret;
  572.  
  573.         intel_dp->can_mst = true;
  574.         intel_dp->mst_mgr.cbs = &mst_cbs;
  575.  
  576.         /* create encoders */
  577.         intel_dp_create_fake_mst_encoders(intel_dig_port);
  578.         ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
  579.         if (ret) {
  580.                 intel_dp->can_mst = false;
  581.                 return ret;
  582.         }
  583.         return 0;
  584. }
  585.  
  586. void
  587. intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
  588. {
  589.         struct intel_dp *intel_dp = &intel_dig_port->dp;
  590.  
  591.         if (!intel_dp->can_mst)
  592.                 return;
  593.  
  594.         drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
  595.         /* encoders will get killed by normal cleanup */
  596. }
  597.