/* * 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 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_device *dev = encoder->base.dev; int bpp; int lane_count, slots, rate; struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; struct intel_connector *found = NULL, *intel_connector; int mst_pbn; pipe_config->dp_encoder_is_mst = true; pipe_config->has_pch_encoder = false; pipe_config->has_dp_encoder = true; bpp = 24; /* * for MST we always configure max link bw - the spec doesn't * seem to suggest we should do otherwise. */ lane_count = drm_dp_max_lane_count(intel_dp->dpcd); rate = intel_dp_max_link_rate(intel_dp); if (intel_dp->num_sink_rates) { intel_dp->link_bw = 0; intel_dp->rate_select = intel_dp_rate_select(intel_dp, rate); } else { intel_dp->link_bw = drm_dp_link_rate_to_bw_code(rate); intel_dp->rate_select = 0; } intel_dp->lane_count = lane_count; pipe_config->pipe_bpp = 24; pipe_config->port_clock = rate; for_each_intel_connector(dev, intel_connector) { if (intel_connector->new_encoder == encoder) { found = intel_connector; break; } } if (!found) { DRM_ERROR("can't find connector\n"); return false; } mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp); pipe_config->pbn = mst_pbn; slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn); intel_link_compute_m_n(bpp, lane_count, adjusted_mode->crtc_clock, pipe_config->port_clock, &pipe_config->dp_m_n); pipe_config->dp_m_n.tu = slots; return true; } static void intel_mst_disable_dp(struct intel_encoder *encoder) { 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; int ret; DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port); ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr); if (ret) { DRM_ERROR("failed to update payload %d\n", ret); } } static void intel_mst_post_disable_dp(struct intel_encoder *encoder) { 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; DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); /* 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, intel_mst->port); intel_dp->active_mst_links--; intel_mst->port = NULL; if (intel_dp->active_mst_links == 0) { intel_dig_port->base.post_disable(&intel_dig_port->base); intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF); } } static void intel_mst_pre_enable_dp(struct intel_encoder *encoder) { 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_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; enum port port = intel_dig_port->port; int ret; uint32_t temp; struct intel_connector *found = NULL, *intel_connector; int slots; struct drm_crtc *crtc = encoder->base.crtc; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); for_each_intel_connector(dev, intel_connector) { if (intel_connector->new_encoder == encoder) { found = intel_connector; break; } } if (!found) { DRM_ERROR("can't find connector\n"); return; } DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); intel_mst->port = found->port; if (intel_dp->active_mst_links == 0) { enum port port = intel_ddi_get_encoder_port(encoder); I915_WRITE(PORT_CLK_SEL(port), intel_crtc->config->ddi_pll_sel); intel_ddi_init_dp_buf_reg(&intel_dig_port->base); intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp); intel_dp_stop_link_train(intel_dp); } ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, intel_mst->port, intel_crtc->config->pbn, &slots); if (ret == false) { DRM_ERROR("failed to allocate vcpi\n"); return; } 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); } static void intel_mst_enable_dp(struct intel_encoder *encoder) { 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_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; enum port port = intel_dig_port->port; int ret; DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT), 1)) DRM_ERROR("Timed out waiting for ACT sent\n"); ret = drm_dp_check_act_status(&intel_dp->mst_mgr); ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr); } 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->port) 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; struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); struct drm_device *dev = encoder->base.dev; struct drm_i915_private *dev_priv = dev->dev_private; enum transcoder cpu_transcoder = pipe_config->cpu_transcoder; u32 temp, flags = 0; pipe_config->has_dp_encoder = true; temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder)); if (temp & TRANS_DDI_PHSYNC) flags |= DRM_MODE_FLAG_PHSYNC; else flags |= DRM_MODE_FLAG_NHSYNC; if (temp & TRANS_DDI_PVSYNC) flags |= DRM_MODE_FLAG_PVSYNC; else flags |= DRM_MODE_FLAG_NVSYNC; switch (temp & TRANS_DDI_BPC_MASK) { case TRANS_DDI_BPC_6: pipe_config->pipe_bpp = 18; break; case TRANS_DDI_BPC_8: pipe_config->pipe_bpp = 24; break; case TRANS_DDI_BPC_10: pipe_config->pipe_bpp = 30; break; case TRANS_DDI_BPC_12: pipe_config->pipe_bpp = 36; break; default: break; } pipe_config->base.adjusted_mode.flags |= flags; intel_dp_get_m_n(crtc, pipe_config); intel_ddi_clock_get(&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; edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port); if (!edid) return 0; 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; return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port); } static int intel_dp_mst_set_property(struct drm_connector *connector, struct drm_property *property, uint64_t val) { return 0; } 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 = { .dpms = intel_connector_dpms, .detect = intel_dp_mst_detect, .fill_modes = drm_helper_probe_single_connector_modes, .set_property = intel_dp_mst_set_property, .atomic_get_property = intel_connector_atomic_get_property, .destroy = intel_dp_mst_connector_destroy, .atomic_destroy_state = drm_atomic_helper_connector_destroy_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) { /* 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; return MODE_OK; } static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector) { struct intel_connector *intel_connector = to_intel_connector(connector); struct intel_dp *intel_dp = intel_connector->mst_port; return &intel_dp->mst_encoders[0]->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, .best_encoder = intel_mst_best_encoder, }; 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) { enum pipe pipe; if (!connector->encoder->get_hw_state(connector->encoder, &pipe)) return false; return true; } return false; } static void intel_connector_add_to_fbdev(struct intel_connector *connector) { #ifdef CONFIG_DRM_I915_FBDEV struct drm_i915_private *dev_priv = to_i915(connector->base.dev); drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base); #endif } static void intel_connector_remove_from_fbdev(struct intel_connector *connector) { #ifdef CONFIG_DRM_I915_FBDEV struct drm_i915_private *dev_priv = to_i915(connector->base.dev); drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base); #endif } 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 intel_connector *intel_connector; struct drm_connector *connector; int i; intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); if (!intel_connector) return NULL; connector = &intel_connector->base; drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort); drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs); intel_connector->unregister = intel_connector_unregister; intel_connector->get_hw_state = intel_dp_mst_get_hw_state; intel_connector->mst_port = intel_dp; intel_connector->port = port; for (i = PIPE_A; i <= PIPE_C; i++) { drm_mode_connector_attach_encoder(&intel_connector->base, &intel_dp->mst_encoders[i]->base.base); } intel_dp_add_properties(intel_dp, connector); drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0); drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0); drm_mode_connector_set_path_property(connector, pathprop); drm_reinit_primary_mode_group(dev); mutex_lock(&dev->mode_config.mutex); intel_connector_add_to_fbdev(intel_connector); mutex_unlock(&dev->mode_config.mutex); drm_connector_register(&intel_connector->base); return connector; } static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_connector *connector) { struct intel_connector *intel_connector = to_intel_connector(connector); struct drm_device *dev = connector->dev; /* need to nuke the connector */ mutex_lock(&dev->mode_config.mutex); intel_connector_dpms(connector, DRM_MODE_DPMS_OFF); mutex_unlock(&dev->mode_config.mutex); intel_connector->unregister(intel_connector); mutex_lock(&dev->mode_config.mutex); intel_connector_remove_from_fbdev(intel_connector); drm_connector_cleanup(connector); mutex_unlock(&dev->mode_config.mutex); drm_reinit_primary_mode_group(dev); kfree(intel_connector); DRM_DEBUG_KMS("\n"); } 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 struct drm_dp_mst_topology_cbs mst_cbs = { .add_connector = intel_dp_add_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); intel_encoder->type = INTEL_OUTPUT_DP_MST; 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_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) { int i; struct intel_dp *intel_dp = &intel_dig_port->dp; for (i = PIPE_A; i <= PIPE_C; i++) intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i); 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->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 */ }