| /* |
| * 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 <drm/drmP.h> |
| #include "i915_drv.h" |
| #include "intel_drv.h" |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_edid.h> |
| |
| 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_atomic_state *state; |
| int bpp, i; |
| int lane_count, slots; |
| const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; |
| struct drm_connector *drm_connector; |
| struct intel_connector *connector, *found = NULL; |
| struct drm_connector_state *connector_state; |
| int mst_pbn; |
| |
| pipe_config->dp_encoder_is_mst = true; |
| pipe_config->has_pch_encoder = false; |
| 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); |
| |
| |
| pipe_config->lane_count = lane_count; |
| |
| pipe_config->pipe_bpp = 24; |
| pipe_config->port_clock = intel_dp_max_link_rate(intel_dp); |
| |
| state = pipe_config->base.state; |
| |
| for_each_connector_in_state(state, drm_connector, connector_state, i) { |
| connector = to_intel_connector(drm_connector); |
| |
| if (connector_state->best_encoder == &encoder->base) { |
| found = connector; |
| break; |
| } |
| } |
| |
| if (!found) { |
| DRM_ERROR("can't find connector\n"); |
| return false; |
| } |
| |
| mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_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->connector->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->connector->port); |
| |
| intel_dp->active_mst_links--; |
| |
| intel_mst->connector = 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 = to_i915(dev); |
| enum port port = intel_dig_port->port; |
| int ret; |
| uint32_t temp; |
| struct intel_connector *found = NULL, *connector; |
| int slots; |
| struct drm_crtc *crtc = encoder->base.crtc; |
| struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
| |
| for_each_intel_connector(dev, connector) { |
| if (connector->base.state->best_encoder == &encoder->base) { |
| found = connector; |
| break; |
| } |
| } |
| |
| if (!found) { |
| DRM_ERROR("can't find connector\n"); |
| return; |
| } |
| |
| /* MST encoders are bound to a crtc, not to a connector, |
| * force the mapping here for get_hw_state. |
| */ |
| found->encoder = encoder; |
| |
| DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links); |
| |
| intel_mst->connector = found; |
| |
| if (intel_dp->active_mst_links == 0) { |
| intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config); |
| |
| intel_prepare_dp_ddi_buffers(&intel_dig_port->base); |
| |
| intel_dp_set_link_params(intel_dp, intel_crtc->config); |
| |
| 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_stop_link_train(intel_dp); |
| } |
| |
| ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr, |
| intel_mst->connector->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 = to_i915(dev); |
| enum port port = intel_dig_port->port; |
| int ret; |
| |
| DRM_DEBUG_KMS("%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"); |
| |
| 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->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; |
| struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); |
| struct drm_device *dev = encoder->base.dev; |
| struct drm_i915_private *dev_priv = to_i915(dev); |
| enum transcoder cpu_transcoder = pipe_config->cpu_transcoder; |
| u32 temp, flags = 0; |
| |
| 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; |
| |
| pipe_config->lane_count = |
| ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; |
| |
| 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; |
| |
| if (!intel_dp) { |
| 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 (!intel_dp) |
| return connector_status_disconnected; |
| 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 = drm_atomic_helper_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, |
| .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) |
| { |
| int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; |
| |
| /* 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->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); |
| |
| if (!intel_dp) |
| return NULL; |
| return &intel_dp->mst_encoders[crtc->pipe]->base.base; |
| } |
| |
| 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; |
| if (!intel_dp) |
| return NULL; |
| 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, |
| .atomic_best_encoder = intel_mst_atomic_best_encoder, |
| .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 && connector->base.state->crtc) { |
| 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_FBDEV_EMULATION |
| struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
| |
| if (dev_priv->fbdev) |
| 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_FBDEV_EMULATION |
| struct drm_i915_private *dev_priv = to_i915(connector->base.dev); |
| |
| if (dev_priv->fbdev) |
| 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 = intel_connector_alloc(); |
| 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->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); |
| return connector; |
| } |
| |
| static void intel_dp_register_mst_connector(struct drm_connector *connector) |
| { |
| struct intel_connector *intel_connector = to_intel_connector(connector); |
| struct drm_device *dev = connector->dev; |
| |
| drm_modeset_lock_all(dev); |
| intel_connector_add_to_fbdev(intel_connector); |
| drm_modeset_unlock_all(dev); |
| |
| drm_connector_register(&intel_connector->base); |
| } |
| |
| 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; |
| |
| drm_connector_unregister(connector); |
| |
| /* need to nuke the connector */ |
| drm_modeset_lock_all(dev); |
| intel_connector_remove_from_fbdev(intel_connector); |
| intel_connector->mst_port = NULL; |
| drm_modeset_unlock_all(dev); |
| |
| drm_connector_unreference(&intel_connector->base); |
| 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 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->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 */ |
| } |