/* * Copyright © 2008 Intel Corporation * 2014 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #include #include "i915_drv.h" #include "intel_drv.h" #include #include #include static bool intel_dp_mst_compute_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; struct drm_connector *connector = conn_state->connector; void *port = to_intel_connector(connector)->port; struct drm_atomic_state *state = pipe_config->base.state; int bpp; int lane_count, slots = 0; const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; int mst_pbn; bool constant_n = drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CONSTANT_N); if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) return false; pipe_config->has_pch_encoder = false; bpp = 24; if (intel_dp->compliance.test_data.bpc) { bpp = intel_dp->compliance.test_data.bpc * 3; DRM_DEBUG_KMS("Setting pipe bpp to %d\n", bpp); } /* * for MST we always configure max link bw - the spec doesn't * seem to suggest we should do otherwise. */ lane_count = intel_dp_max_lane_count(intel_dp); pipe_config->lane_count = lane_count; pipe_config->pipe_bpp = bpp; pipe_config->port_clock = intel_dp_max_link_rate(intel_dp); if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port)) pipe_config->has_audio = true; mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp); pipe_config->pbn = mst_pbn; /* Zombie connectors can't have VCPI slots */ if (!drm_connector_is_unregistered(connector)) { slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr, port, mst_pbn); if (slots < 0) { DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots); return false; } } intel_link_compute_m_n(bpp, lane_count, adjusted_mode->crtc_clock, pipe_config->port_clock, &pipe_config->dp_m_n, constant_n); pipe_config->dp_m_n.tu = slots; if (IS_GEN9_LP(dev_priv)) pipe_config->lane_lat_optim_mask = bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count); intel_ddi_compute_min_voltage_level(dev_priv, pipe_config); return true; } static int intel_dp_mst_atomic_check(struct drm_connector *connector, struct drm_connector_state *new_conn_state) { struct drm_atomic_state *state = new_conn_state->state; struct drm_connector_state *old_conn_state; struct drm_crtc *old_crtc; struct drm_crtc_state *crtc_state; int slots, ret = 0; old_conn_state = drm_atomic_get_old_connector_state(state, connector); old_crtc = old_conn_state->crtc; if (!old_crtc) return ret; crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc); slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu; if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) { struct drm_dp_mst_topology_mgr *mgr; struct drm_encoder *old_encoder; old_encoder = old_conn_state->best_encoder; mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr; ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots); if (ret) DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret); else to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0; } return ret; } static void intel_mst_disable_dp(struct intel_encoder *encoder, const struct intel_crtc_state *old_crtc_state, const struct drm_connector_state *old_conn_state) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; struct intel_connector *connector = to_intel_connector(old_conn_state->connector); int ret; DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port); ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); if (ret) { DRM_ERROR("failed to update payload %d\n", ret); } if (old_crtc_state->has_audio) intel_audio_codec_disable(encoder, old_crtc_state, old_conn_state); } static void intel_mst_post_disable_dp(struct intel_encoder *encoder, const struct intel_crtc_state *old_crtc_state, const struct drm_connector_state *old_conn_state) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; struct intel_connector *connector = to_intel_connector(old_conn_state->connector); intel_ddi_disable_pipe_clock(old_crtc_state); /* this can fail */ drm_dp_check_act_status(&intel_dp->mst_mgr); /* and this can also fail */ drm_dp_update_payload_part2(&intel_dp->mst_mgr); drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port); /* * Power down mst path before disabling the port, otherwise we end * up getting interrupts from the sink upon detecting link loss. */ drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, false); intel_dp->active_mst_links--; intel_mst->connector = NULL; if (intel_dp->active_mst_links == 0) { intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); intel_dig_port->base.post_disable(&intel_dig_port->base, old_crtc_state, NULL); } DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); } static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder, const struct intel_crtc_state *pipe_config, const struct drm_connector_state *conn_state) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; if (intel_dp->active_mst_links == 0 && intel_dig_port->base.pre_pll_enable) intel_dig_port->base.pre_pll_enable(&intel_dig_port->base, pipe_config, NULL); } static void intel_mst_pre_enable_dp(struct intel_encoder *encoder, const struct intel_crtc_state *pipe_config, const struct drm_connector_state *conn_state) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum port port = intel_dig_port->base.port; struct intel_connector *connector = to_intel_connector(conn_state->connector); int ret; uint32_t temp; /* MST encoders are bound to a crtc, not to a connector, * force the mapping here for get_hw_state. */ connector->encoder = encoder; intel_mst->connector = connector; DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); if (intel_dp->active_mst_links == 0) intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true); if (intel_dp->active_mst_links == 0) intel_dig_port->base.pre_enable(&intel_dig_port->base, pipe_config, NULL); ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, connector->port, pipe_config->pbn, pipe_config->dp_m_n.tu); if (!ret) DRM_ERROR("failed to allocate vcpi\n"); intel_dp->active_mst_links++; temp = I915_READ(DP_TP_STATUS(port)); I915_WRITE(DP_TP_STATUS(port), temp); ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); intel_ddi_enable_pipe_clock(pipe_config); } static void intel_mst_enable_dp(struct intel_encoder *encoder, const struct intel_crtc_state *pipe_config, const struct drm_connector_state *conn_state) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_dp *intel_dp = &intel_dig_port->dp; struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum port port = intel_dig_port->base.port; DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links); if (intel_wait_for_register(dev_priv, DP_TP_STATUS(port), DP_TP_STATUS_ACT_SENT, DP_TP_STATUS_ACT_SENT, 1)) DRM_ERROR("Timed out waiting for ACT sent\n"); drm_dp_check_act_status(&intel_dp->mst_mgr); drm_dp_update_payload_part2(&intel_dp->mst_mgr); if (pipe_config->has_audio) intel_audio_codec_enable(encoder, pipe_config, conn_state); } static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder, enum pipe *pipe) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); *pipe = intel_mst->pipe; if (intel_mst->connector) return true; return false; } static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_digital_port *intel_dig_port = intel_mst->primary; intel_ddi_get_config(&intel_dig_port->base, pipe_config); } static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector) { struct intel_connector *intel_connector = to_intel_connector(connector); struct intel_dp *intel_dp = intel_connector->mst_port; struct edid *edid; int ret; if (drm_connector_is_unregistered(connector)) return intel_connector_update_modes(connector, NULL); edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); ret = intel_connector_update_modes(connector, edid); kfree(edid); return ret; } static enum drm_connector_status intel_dp_mst_detect(struct drm_connector *connector, bool force) { struct intel_connector *intel_connector = to_intel_connector(connector); struct intel_dp *intel_dp = intel_connector->mst_port; if (drm_connector_is_unregistered(connector)) return connector_status_disconnected; return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port); } static void intel_dp_mst_connector_destroy(struct drm_connector *connector) { struct intel_connector *intel_connector = to_intel_connector(connector); if (!IS_ERR_OR_NULL(intel_connector->edid)) kfree(intel_connector->edid); drm_connector_cleanup(connector); kfree(connector); } static const struct drm_connector_funcs intel_dp_mst_connector_funcs = { .detect = intel_dp_mst_detect, .fill_modes = drm_helper_probe_single_connector_modes, .late_register = intel_connector_register, .early_unregister = intel_connector_unregister, .destroy = intel_dp_mst_connector_destroy, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, }; static int intel_dp_mst_get_modes(struct drm_connector *connector) { return intel_dp_mst_get_ddc_modes(connector); } static enum drm_mode_status intel_dp_mst_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct intel_connector *intel_connector = to_intel_connector(connector); struct intel_dp *intel_dp = intel_connector->mst_port; int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; int bpp = 24; /* MST uses fixed bpp */ int max_rate, mode_rate, max_lanes, max_link_clock; if (drm_connector_is_unregistered(connector)) return MODE_ERROR; if (mode->flags & DRM_MODE_FLAG_DBLSCAN) return MODE_NO_DBLESCAN; max_link_clock = intel_dp_max_link_rate(intel_dp); max_lanes = intel_dp_max_lane_count(intel_dp); max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); mode_rate = intel_dp_link_required(mode->clock, bpp); /* TODO - validate mode against available PBN for link */ if (mode->clock < 10000) return MODE_CLOCK_LOW; if (mode->flags & DRM_MODE_FLAG_DBLCLK) return MODE_H_ILLEGAL; if (mode_rate > max_rate || mode->clock > max_dotclk) return MODE_CLOCK_HIGH; return MODE_OK; } static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector, struct drm_connector_state *state) { struct intel_connector *intel_connector = to_intel_connector(connector); struct intel_dp *intel_dp = intel_connector->mst_port; struct intel_crtc *crtc = to_intel_crtc(state->crtc); return &intel_dp->mst_encoders[crtc->pipe]->base.base; } static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = { .get_modes = intel_dp_mst_get_modes, .mode_valid = intel_dp_mst_mode_valid, .atomic_best_encoder = intel_mst_atomic_best_encoder, .atomic_check = intel_dp_mst_atomic_check, }; static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder) { struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); drm_encoder_cleanup(encoder); kfree(intel_mst); } static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = { .destroy = intel_dp_mst_encoder_destroy, }; static bool intel_dp_mst_get_hw_state(struct intel_connector *connector) { if (connector->encoder && connector->base.state->crtc) { enum pipe pipe; if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) return false; return true; } return false; } 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) { struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_connector *intel_connector; struct drm_connector *connector; enum pipe pipe; int ret; intel_connector = intel_connector_alloc(); if (!intel_connector) return NULL; intel_connector->get_hw_state = intel_dp_mst_get_hw_state; intel_connector->mst_port = intel_dp; intel_connector->port = port; connector = &intel_connector->base; ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); if (ret) { intel_connector_free(intel_connector); return NULL; } drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); for_each_pipe(dev_priv, pipe) { struct drm_encoder *enc = &intel_dp->mst_encoders[pipe]->base.base; ret = drm_connector_attach_encoder(&intel_connector->base, enc); if (ret) goto err; } drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); ret = drm_connector_set_path_property(connector, pathprop); if (ret) goto err; return connector; err: drm_connector_cleanup(connector); return NULL; } static void intel_dp_register_mst_connector(struct drm_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->dev); if (dev_priv->fbdev) drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, connector); drm_connector_register(connector); } static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->dev); DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name); drm_connector_unregister(connector); if (dev_priv->fbdev) drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, connector); drm_connector_put(connector); } static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr) { struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr); struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); struct drm_device *dev = intel_dig_port->base.base.dev; drm_kms_helper_hotplug_event(dev); } static const struct drm_dp_mst_topology_cbs mst_cbs = { .add_connector = intel_dp_add_mst_connector, .register_connector = intel_dp_register_mst_connector, .destroy_connector = intel_dp_destroy_mst_connector, .hotplug = intel_dp_mst_hotplug, }; static struct intel_dp_mst_encoder * intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe) { struct intel_dp_mst_encoder *intel_mst; struct intel_encoder *intel_encoder; struct drm_device *dev = intel_dig_port->base.base.dev; intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL); if (!intel_mst) return NULL; intel_mst->pipe = pipe; intel_encoder = &intel_mst->base; intel_mst->primary = intel_dig_port; drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs, DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe)); intel_encoder->type = INTEL_OUTPUT_DP_MST; intel_encoder->power_domain = intel_dig_port->base.power_domain; intel_encoder->port = intel_dig_port->base.port; intel_encoder->crtc_mask = 0x7; intel_encoder->cloneable = 0; intel_encoder->compute_config = intel_dp_mst_compute_config; intel_encoder->disable = intel_mst_disable_dp; intel_encoder->post_disable = intel_mst_post_disable_dp; intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp; intel_encoder->pre_enable = intel_mst_pre_enable_dp; intel_encoder->enable = intel_mst_enable_dp; intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state; intel_encoder->get_config = intel_dp_mst_enc_get_config; return intel_mst; } static bool intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port) { struct intel_dp *intel_dp = &intel_dig_port->dp; struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev); enum pipe pipe; for_each_pipe(dev_priv, pipe) intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe); return true; } int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id) { struct intel_dp *intel_dp = &intel_dig_port->dp; struct drm_device *dev = intel_dig_port->base.base.dev; int ret; intel_dp->can_mst = true; intel_dp->mst_mgr.cbs = &mst_cbs; /* create encoders */ intel_dp_create_fake_mst_encoders(intel_dig_port); ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev, &intel_dp->aux, 16, 3, conn_base_id); if (ret) { intel_dp->can_mst = false; return ret; } return 0; } void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port) { struct intel_dp *intel_dp = &intel_dig_port->dp; if (!intel_dp->can_mst) return; drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr); /* encoders will get killed by normal cleanup */ }