| /* |
| * Copyright 2012-15 Advanced Micro Devices, 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. |
| * |
| * Authors: AMD |
| * |
| */ |
| |
| #include <linux/version.h> |
| #include <drm/drm_atomic_helper.h> |
| #include "dm_services.h" |
| #include "amdgpu.h" |
| #include "amdgpu_dm.h" |
| #include "amdgpu_dm_mst_types.h" |
| |
| #include "dc.h" |
| #include "dm_helpers.h" |
| |
| #include "dc_link_ddc.h" |
| |
| /* #define TRACE_DPCD */ |
| |
| #ifdef TRACE_DPCD |
| #define SIDE_BAND_MSG(address) (address >= DP_SIDEBAND_MSG_DOWN_REQ_BASE && address < DP_SINK_COUNT_ESI) |
| |
| static inline char *side_band_msg_type_to_str(uint32_t address) |
| { |
| static char str[10] = {0}; |
| |
| if (address < DP_SIDEBAND_MSG_UP_REP_BASE) |
| strcpy(str, "DOWN_REQ"); |
| else if (address < DP_SIDEBAND_MSG_DOWN_REP_BASE) |
| strcpy(str, "UP_REP"); |
| else if (address < DP_SIDEBAND_MSG_UP_REQ_BASE) |
| strcpy(str, "DOWN_REP"); |
| else |
| strcpy(str, "UP_REQ"); |
| |
| return str; |
| } |
| |
| static void log_dpcd(uint8_t type, |
| uint32_t address, |
| uint8_t *data, |
| uint32_t size, |
| bool res) |
| { |
| DRM_DEBUG_KMS("Op: %s, addr: %04x, SideBand Msg: %s, Op res: %s\n", |
| (type == DP_AUX_NATIVE_READ) || |
| (type == DP_AUX_I2C_READ) ? |
| "Read" : "Write", |
| address, |
| SIDE_BAND_MSG(address) ? |
| side_band_msg_type_to_str(address) : "Nop", |
| res ? "OK" : "Fail"); |
| |
| if (res) { |
| print_hex_dump(KERN_INFO, "Body: ", DUMP_PREFIX_NONE, 16, 1, data, size, false); |
| } |
| } |
| #endif |
| |
| static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, |
| struct drm_dp_aux_msg *msg) |
| { |
| enum i2c_mot_mode mot = (msg->request & DP_AUX_I2C_MOT) ? |
| I2C_MOT_TRUE : I2C_MOT_FALSE; |
| enum ddc_result res; |
| ssize_t read_bytes; |
| |
| if (WARN_ON(msg->size > 16)) |
| return -E2BIG; |
| |
| switch (msg->request & ~DP_AUX_I2C_MOT) { |
| case DP_AUX_NATIVE_READ: |
| read_bytes = dal_ddc_service_read_dpcd_data( |
| TO_DM_AUX(aux)->ddc_service, |
| false, |
| I2C_MOT_UNDEF, |
| msg->address, |
| msg->buffer, |
| msg->size); |
| return read_bytes; |
| case DP_AUX_NATIVE_WRITE: |
| res = dal_ddc_service_write_dpcd_data( |
| TO_DM_AUX(aux)->ddc_service, |
| false, |
| I2C_MOT_UNDEF, |
| msg->address, |
| msg->buffer, |
| msg->size); |
| break; |
| case DP_AUX_I2C_READ: |
| read_bytes = dal_ddc_service_read_dpcd_data( |
| TO_DM_AUX(aux)->ddc_service, |
| true, |
| mot, |
| msg->address, |
| msg->buffer, |
| msg->size); |
| return read_bytes; |
| case DP_AUX_I2C_WRITE: |
| res = dal_ddc_service_write_dpcd_data( |
| TO_DM_AUX(aux)->ddc_service, |
| true, |
| mot, |
| msg->address, |
| msg->buffer, |
| msg->size); |
| break; |
| default: |
| return 0; |
| } |
| |
| #ifdef TRACE_DPCD |
| log_dpcd(msg->request, |
| msg->address, |
| msg->buffer, |
| msg->size, |
| r == DDC_RESULT_SUCESSFULL); |
| #endif |
| |
| return msg->size; |
| } |
| |
| static enum drm_connector_status |
| dm_dp_mst_detect(struct drm_connector *connector, bool force) |
| { |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| struct amdgpu_dm_connector *master = aconnector->mst_port; |
| |
| enum drm_connector_status status = |
| drm_dp_mst_detect_port( |
| connector, |
| &master->mst_mgr, |
| aconnector->port); |
| |
| return status; |
| } |
| |
| static void |
| dm_dp_mst_connector_destroy(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector); |
| struct amdgpu_encoder *amdgpu_encoder = amdgpu_dm_connector->mst_encoder; |
| |
| drm_encoder_cleanup(&amdgpu_encoder->base); |
| kfree(amdgpu_encoder); |
| drm_connector_cleanup(connector); |
| kfree(amdgpu_dm_connector); |
| } |
| |
| static const struct drm_connector_funcs dm_dp_mst_connector_funcs = { |
| .detect = dm_dp_mst_detect, |
| .fill_modes = drm_helper_probe_single_connector_modes, |
| .destroy = dm_dp_mst_connector_destroy, |
| .reset = amdgpu_dm_connector_funcs_reset, |
| .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state, |
| .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, |
| .atomic_set_property = amdgpu_dm_connector_atomic_set_property, |
| .atomic_get_property = amdgpu_dm_connector_atomic_get_property |
| }; |
| |
| void dm_dp_mst_dc_sink_create(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| struct edid *edid; |
| struct dc_sink *dc_sink; |
| struct dc_sink_init_data init_params = { |
| .link = aconnector->dc_link, |
| .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST }; |
| |
| /* |
| * TODO: Need to further figure out why ddc.algo is NULL while MST port exists |
| */ |
| if (!aconnector->port || !aconnector->port->aux.ddc.algo) |
| return; |
| |
| edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port); |
| |
| if (!edid) { |
| drm_mode_connector_update_edid_property( |
| &aconnector->base, |
| NULL); |
| return; |
| } |
| |
| aconnector->edid = edid; |
| |
| dc_sink = dc_link_add_remote_sink( |
| aconnector->dc_link, |
| (uint8_t *)aconnector->edid, |
| (aconnector->edid->extensions + 1) * EDID_LENGTH, |
| &init_params); |
| |
| dc_sink->priv = aconnector; |
| aconnector->dc_sink = dc_sink; |
| |
| amdgpu_dm_add_sink_to_freesync_module( |
| connector, aconnector->edid); |
| |
| drm_mode_connector_update_edid_property( |
| &aconnector->base, aconnector->edid); |
| } |
| |
| static int dm_dp_mst_get_modes(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| int ret = 0; |
| |
| if (!aconnector) |
| return drm_add_edid_modes(connector, NULL); |
| |
| if (!aconnector->edid) { |
| struct edid *edid; |
| struct dc_sink *dc_sink; |
| struct dc_sink_init_data init_params = { |
| .link = aconnector->dc_link, |
| .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST }; |
| edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port); |
| |
| if (!edid) { |
| drm_mode_connector_update_edid_property( |
| &aconnector->base, |
| NULL); |
| return ret; |
| } |
| |
| aconnector->edid = edid; |
| |
| dc_sink = dc_link_add_remote_sink( |
| aconnector->dc_link, |
| (uint8_t *)edid, |
| (edid->extensions + 1) * EDID_LENGTH, |
| &init_params); |
| |
| dc_sink->priv = aconnector; |
| aconnector->dc_sink = dc_sink; |
| |
| if (aconnector->dc_sink) |
| amdgpu_dm_add_sink_to_freesync_module( |
| connector, edid); |
| |
| drm_mode_connector_update_edid_property( |
| &aconnector->base, edid); |
| } |
| |
| ret = drm_add_edid_modes(connector, aconnector->edid); |
| |
| return ret; |
| } |
| |
| static struct drm_encoder *dm_mst_best_encoder(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector); |
| |
| return &amdgpu_dm_connector->mst_encoder->base; |
| } |
| |
| static const struct drm_connector_helper_funcs dm_dp_mst_connector_helper_funcs = { |
| .get_modes = dm_dp_mst_get_modes, |
| .mode_valid = amdgpu_dm_connector_mode_valid, |
| .best_encoder = dm_mst_best_encoder, |
| }; |
| |
| static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder) |
| { |
| drm_encoder_cleanup(encoder); |
| kfree(encoder); |
| } |
| |
| static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = { |
| .destroy = amdgpu_dm_encoder_destroy, |
| }; |
| |
| static struct amdgpu_encoder * |
| dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector) |
| { |
| struct drm_device *dev = connector->base.dev; |
| struct amdgpu_device *adev = dev->dev_private; |
| struct amdgpu_encoder *amdgpu_encoder; |
| struct drm_encoder *encoder; |
| const struct drm_connector_helper_funcs *connector_funcs = |
| connector->base.helper_private; |
| struct drm_encoder *enc_master = |
| connector_funcs->best_encoder(&connector->base); |
| |
| DRM_DEBUG_KMS("enc master is %p\n", enc_master); |
| amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL); |
| if (!amdgpu_encoder) |
| return NULL; |
| |
| encoder = &amdgpu_encoder->base; |
| encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev); |
| |
| drm_encoder_init( |
| dev, |
| &amdgpu_encoder->base, |
| &amdgpu_dm_encoder_funcs, |
| DRM_MODE_ENCODER_DPMST, |
| NULL); |
| |
| drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs); |
| |
| return amdgpu_encoder; |
| } |
| |
| static struct drm_connector * |
| dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_dp_mst_port *port, |
| const char *pathprop) |
| { |
| struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr); |
| struct drm_device *dev = master->base.dev; |
| struct amdgpu_device *adev = dev->dev_private; |
| struct amdgpu_dm_connector *aconnector; |
| struct drm_connector *connector; |
| struct drm_connector_list_iter conn_iter; |
| |
| drm_connector_list_iter_begin(dev, &conn_iter); |
| drm_for_each_connector_iter(connector, &conn_iter) { |
| aconnector = to_amdgpu_dm_connector(connector); |
| if (aconnector->mst_port == master |
| && !aconnector->port) { |
| DRM_INFO("DM_MST: reusing connector: %p [id: %d] [master: %p]\n", |
| aconnector, connector->base.id, aconnector->mst_port); |
| |
| aconnector->port = port; |
| drm_mode_connector_set_path_property(connector, pathprop); |
| |
| drm_connector_list_iter_end(&conn_iter); |
| aconnector->mst_connected = true; |
| return &aconnector->base; |
| } |
| } |
| drm_connector_list_iter_end(&conn_iter); |
| |
| aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL); |
| if (!aconnector) |
| return NULL; |
| |
| connector = &aconnector->base; |
| aconnector->port = port; |
| aconnector->mst_port = master; |
| |
| if (drm_connector_init( |
| dev, |
| connector, |
| &dm_dp_mst_connector_funcs, |
| DRM_MODE_CONNECTOR_DisplayPort)) { |
| kfree(aconnector); |
| return NULL; |
| } |
| drm_connector_helper_add(connector, &dm_dp_mst_connector_helper_funcs); |
| |
| amdgpu_dm_connector_init_helper( |
| &adev->dm, |
| aconnector, |
| DRM_MODE_CONNECTOR_DisplayPort, |
| master->dc_link, |
| master->connector_id); |
| |
| aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master); |
| |
| /* |
| * TODO: understand why this one is needed |
| */ |
| 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); |
| |
| /* |
| * Initialize connector state before adding the connectror to drm and |
| * framebuffer lists |
| */ |
| amdgpu_dm_connector_funcs_reset(connector); |
| |
| aconnector->mst_connected = true; |
| |
| DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n", |
| aconnector, connector->base.id, aconnector->mst_port); |
| |
| DRM_DEBUG_KMS(":%d\n", connector->base.id); |
| |
| return connector; |
| } |
| |
| static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr, |
| struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| |
| DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n", |
| aconnector, connector->base.id, aconnector->mst_port); |
| |
| aconnector->port = NULL; |
| if (aconnector->dc_sink) { |
| amdgpu_dm_remove_sink_from_freesync_module(connector); |
| dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink); |
| dc_sink_release(aconnector->dc_sink); |
| aconnector->dc_sink = NULL; |
| } |
| if (aconnector->edid) { |
| kfree(aconnector->edid); |
| aconnector->edid = NULL; |
| } |
| |
| drm_mode_connector_update_edid_property( |
| &aconnector->base, |
| NULL); |
| |
| aconnector->mst_connected = false; |
| } |
| |
| static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr) |
| { |
| struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr); |
| struct drm_device *dev = master->base.dev; |
| |
| drm_kms_helper_hotplug_event(dev); |
| } |
| |
| static void dm_dp_mst_link_status_reset(struct drm_connector *connector) |
| { |
| mutex_lock(&connector->dev->mode_config.mutex); |
| drm_mode_connector_set_link_status_property(connector, DRM_MODE_LINK_STATUS_BAD); |
| mutex_unlock(&connector->dev->mode_config.mutex); |
| } |
| |
| static void dm_dp_mst_register_connector(struct drm_connector *connector) |
| { |
| struct drm_device *dev = connector->dev; |
| struct amdgpu_device *adev = dev->dev_private; |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| |
| if (adev->mode_info.rfbdev) |
| drm_fb_helper_add_one_connector(&adev->mode_info.rfbdev->helper, connector); |
| else |
| DRM_ERROR("adev->mode_info.rfbdev is NULL\n"); |
| |
| drm_connector_register(connector); |
| |
| if (aconnector->mst_connected) |
| dm_dp_mst_link_status_reset(connector); |
| } |
| |
| static const struct drm_dp_mst_topology_cbs dm_mst_cbs = { |
| .add_connector = dm_dp_add_mst_connector, |
| .destroy_connector = dm_dp_destroy_mst_connector, |
| .hotplug = dm_dp_mst_hotplug, |
| .register_connector = dm_dp_mst_register_connector |
| }; |
| |
| void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, |
| struct amdgpu_dm_connector *aconnector) |
| { |
| aconnector->dm_dp_aux.aux.name = "dmdc"; |
| aconnector->dm_dp_aux.aux.dev = dm->adev->dev; |
| aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer; |
| aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc; |
| |
| drm_dp_aux_register(&aconnector->dm_dp_aux.aux); |
| aconnector->mst_mgr.cbs = &dm_mst_cbs; |
| drm_dp_mst_topology_mgr_init( |
| &aconnector->mst_mgr, |
| dm->adev->ddev, |
| &aconnector->dm_dp_aux.aux, |
| 16, |
| 4, |
| aconnector->connector_id); |
| } |
| |