| /* |
| * 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 <drm/display/drm_dp_helper.h> |
| #include <drm/display/drm_dp_mst_helper.h> |
| #include <drm/drm_atomic.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" |
| #include "dc_link_dp.h" |
| #include "ddc_service_types.h" |
| #include "dpcd_defs.h" |
| |
| #include "i2caux_interface.h" |
| #include "dmub_cmd.h" |
| #if defined(CONFIG_DEBUG_FS) |
| #include "amdgpu_dm_debugfs.h" |
| #endif |
| |
| #include "dc/dcn20/dcn20_resource.h" |
| bool is_timing_changed(struct dc_stream_state *cur_stream, |
| struct dc_stream_state *new_stream); |
| |
| |
| static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, |
| struct drm_dp_aux_msg *msg) |
| { |
| ssize_t result = 0; |
| struct aux_payload payload; |
| enum aux_return_code_type operation_result; |
| struct amdgpu_device *adev; |
| struct ddc_service *ddc; |
| |
| if (WARN_ON(msg->size > 16)) |
| return -E2BIG; |
| |
| payload.address = msg->address; |
| payload.data = msg->buffer; |
| payload.length = msg->size; |
| payload.reply = &msg->reply; |
| payload.i2c_over_aux = (msg->request & DP_AUX_NATIVE_WRITE) == 0; |
| payload.write = (msg->request & DP_AUX_I2C_READ) == 0; |
| payload.mot = (msg->request & DP_AUX_I2C_MOT) != 0; |
| payload.write_status_update = |
| (msg->request & DP_AUX_I2C_WRITE_STATUS_UPDATE) != 0; |
| payload.defer_delay = 0; |
| |
| result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload, |
| &operation_result); |
| |
| /* |
| * w/a on certain intel platform where hpd is unexpected to pull low during |
| * 1st sideband message transaction by return AUX_RET_ERROR_HPD_DISCON |
| * aux transaction is succuess in such case, therefore bypass the error |
| */ |
| ddc = TO_DM_AUX(aux)->ddc_service; |
| adev = ddc->ctx->driver_context; |
| if (adev->dm.aux_hpd_discon_quirk) { |
| if (msg->address == DP_SIDEBAND_MSG_DOWN_REQ_BASE && |
| operation_result == AUX_RET_ERROR_HPD_DISCON) { |
| result = 0; |
| operation_result = AUX_RET_SUCCESS; |
| } |
| } |
| |
| if (payload.write && result >= 0) |
| result = msg->size; |
| |
| if (result < 0) |
| switch (operation_result) { |
| case AUX_RET_SUCCESS: |
| break; |
| case AUX_RET_ERROR_HPD_DISCON: |
| case AUX_RET_ERROR_UNKNOWN: |
| case AUX_RET_ERROR_INVALID_OPERATION: |
| case AUX_RET_ERROR_PROTOCOL_ERROR: |
| result = -EIO; |
| break; |
| case AUX_RET_ERROR_INVALID_REPLY: |
| case AUX_RET_ERROR_ENGINE_ACQUIRE: |
| result = -EBUSY; |
| break; |
| case AUX_RET_ERROR_TIMEOUT: |
| result = -ETIMEDOUT; |
| break; |
| } |
| |
| return result; |
| } |
| |
| static void |
| dm_dp_mst_connector_destroy(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *aconnector = |
| to_amdgpu_dm_connector(connector); |
| |
| if (aconnector->dc_sink) { |
| dc_link_remove_remote_sink(aconnector->dc_link, |
| aconnector->dc_sink); |
| dc_sink_release(aconnector->dc_sink); |
| } |
| |
| kfree(aconnector->edid); |
| |
| drm_connector_cleanup(connector); |
| drm_dp_mst_put_port_malloc(aconnector->port); |
| kfree(aconnector); |
| } |
| |
| static int |
| amdgpu_dm_mst_connector_late_register(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *amdgpu_dm_connector = |
| to_amdgpu_dm_connector(connector); |
| int r; |
| |
| r = drm_dp_mst_connector_late_register(connector, |
| amdgpu_dm_connector->port); |
| if (r < 0) |
| return r; |
| |
| #if defined(CONFIG_DEBUG_FS) |
| connector_debugfs_init(amdgpu_dm_connector); |
| #endif |
| |
| return 0; |
| } |
| |
| static void |
| amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector) |
| { |
| struct amdgpu_dm_connector *aconnector = |
| to_amdgpu_dm_connector(connector); |
| struct drm_dp_mst_port *port = aconnector->port; |
| struct amdgpu_dm_connector *root = aconnector->mst_port; |
| struct dc_link *dc_link = aconnector->dc_link; |
| struct dc_sink *dc_sink = aconnector->dc_sink; |
| |
| drm_dp_mst_connector_early_unregister(connector, port); |
| |
| /* |
| * Release dc_sink for connector which its attached port is |
| * no longer in the mst topology |
| */ |
| drm_modeset_lock(&root->mst_mgr.base.lock, NULL); |
| if (dc_sink) { |
| if (dc_link->sink_count) |
| dc_link_remove_remote_sink(dc_link, dc_sink); |
| |
| dc_sink_release(dc_sink); |
| aconnector->dc_sink = NULL; |
| aconnector->edid = NULL; |
| } |
| |
| aconnector->mst_status = MST_STATUS_DEFAULT; |
| drm_modeset_unlock(&root->mst_mgr.base.lock); |
| } |
| |
| static const struct drm_connector_funcs dm_dp_mst_connector_funcs = { |
| .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, |
| .late_register = amdgpu_dm_mst_connector_late_register, |
| .early_unregister = amdgpu_dm_mst_connector_early_unregister, |
| }; |
| |
| #if defined(CONFIG_DRM_AMD_DC_DCN) |
| bool needs_dsc_aux_workaround(struct dc_link *link) |
| { |
| if (link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_90CC24 && |
| (link->dpcd_caps.dpcd_rev.raw == DPCD_REV_14 || link->dpcd_caps.dpcd_rev.raw == DPCD_REV_12) && |
| link->dpcd_caps.sink_count.bits.SINK_COUNT >= 2) |
| return true; |
| |
| return false; |
| } |
| |
| static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnector) |
| { |
| struct dc_sink *dc_sink = aconnector->dc_sink; |
| struct drm_dp_mst_port *port = aconnector->port; |
| u8 dsc_caps[16] = { 0 }; |
| u8 dsc_branch_dec_caps_raw[3] = { 0 }; // DSC branch decoder caps 0xA0 ~ 0xA2 |
| u8 *dsc_branch_dec_caps = NULL; |
| |
| aconnector->dsc_aux = drm_dp_mst_dsc_aux_for_port(port); |
| |
| /* |
| * drm_dp_mst_dsc_aux_for_port() will return NULL for certain configs |
| * because it only check the dsc/fec caps of the "port variable" and not the dock |
| * |
| * This case will return NULL: DSC capabe MST dock connected to a non fec/dsc capable display |
| * |
| * Workaround: explicitly check the use case above and use the mst dock's aux as dsc_aux |
| * |
| */ |
| if (!aconnector->dsc_aux && !port->parent->port_parent && |
| needs_dsc_aux_workaround(aconnector->dc_link)) |
| aconnector->dsc_aux = &aconnector->mst_port->dm_dp_aux.aux; |
| |
| if (!aconnector->dsc_aux) |
| return false; |
| |
| if (drm_dp_dpcd_read(aconnector->dsc_aux, DP_DSC_SUPPORT, dsc_caps, 16) < 0) |
| return false; |
| |
| if (drm_dp_dpcd_read(aconnector->dsc_aux, |
| DP_DSC_BRANCH_OVERALL_THROUGHPUT_0, dsc_branch_dec_caps_raw, 3) == 3) |
| dsc_branch_dec_caps = dsc_branch_dec_caps_raw; |
| |
| if (!dc_dsc_parse_dsc_dpcd(aconnector->dc_link->ctx->dc, |
| dsc_caps, dsc_branch_dec_caps, |
| &dc_sink->dsc_caps.dsc_dec_caps)) |
| return false; |
| |
| return true; |
| } |
| |
| static bool retrieve_downstream_port_device(struct amdgpu_dm_connector *aconnector) |
| { |
| union dp_downstream_port_present ds_port_present; |
| |
| if (!aconnector->dsc_aux) |
| return false; |
| |
| if (drm_dp_dpcd_read(aconnector->dsc_aux, DP_DOWNSTREAMPORT_PRESENT, &ds_port_present, 1) < 0) { |
| DRM_INFO("Failed to read downstream_port_present 0x05 from DFP of branch device\n"); |
| return false; |
| } |
| |
| aconnector->mst_downstream_port_present = ds_port_present; |
| DRM_INFO("Downstream port present %d, type %d\n", |
| ds_port_present.fields.PORT_PRESENT, ds_port_present.fields.PORT_TYPE); |
| |
| return true; |
| } |
| #endif |
| |
| 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; |
| edid = drm_dp_mst_get_edid(connector, &aconnector->mst_port->mst_mgr, aconnector->port); |
| |
| if (!edid) { |
| amdgpu_dm_set_mst_status(&aconnector->mst_status, |
| MST_REMOTE_EDID, false); |
| |
| drm_connector_update_edid_property( |
| &aconnector->base, |
| NULL); |
| |
| DRM_DEBUG_KMS("Can't get EDID of %s. Add default remote sink.", connector->name); |
| if (!aconnector->dc_sink) { |
| struct dc_sink *dc_sink; |
| struct dc_sink_init_data init_params = { |
| .link = aconnector->dc_link, |
| .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST }; |
| |
| dc_sink = dc_link_add_remote_sink( |
| aconnector->dc_link, |
| NULL, |
| 0, |
| &init_params); |
| |
| if (!dc_sink) { |
| DRM_ERROR("Unable to add a remote sink\n"); |
| return 0; |
| } |
| |
| dc_sink->priv = aconnector; |
| aconnector->dc_sink = dc_sink; |
| } |
| |
| return ret; |
| } |
| |
| aconnector->edid = edid; |
| amdgpu_dm_set_mst_status(&aconnector->mst_status, |
| MST_REMOTE_EDID, true); |
| } |
| |
| if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL) { |
| dc_sink_release(aconnector->dc_sink); |
| aconnector->dc_sink = NULL; |
| } |
| |
| if (!aconnector->dc_sink) { |
| struct dc_sink *dc_sink; |
| struct dc_sink_init_data init_params = { |
| .link = aconnector->dc_link, |
| .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST }; |
| dc_sink = dc_link_add_remote_sink( |
| aconnector->dc_link, |
| (uint8_t *)aconnector->edid, |
| (aconnector->edid->extensions + 1) * EDID_LENGTH, |
| &init_params); |
| |
| if (!dc_sink) { |
| DRM_ERROR("Unable to add a remote sink\n"); |
| return 0; |
| } |
| |
| dc_sink->priv = aconnector; |
| /* dc_link_add_remote_sink returns a new reference */ |
| aconnector->dc_sink = dc_sink; |
| |
| if (aconnector->dc_sink) { |
| amdgpu_dm_update_freesync_caps( |
| connector, aconnector->edid); |
| |
| #if defined(CONFIG_DRM_AMD_DC_DCN) |
| if (!validate_dsc_caps_on_connector(aconnector)) |
| memset(&aconnector->dc_sink->dsc_caps, |
| 0, sizeof(aconnector->dc_sink->dsc_caps)); |
| |
| if (!retrieve_downstream_port_device(aconnector)) |
| memset(&aconnector->mst_downstream_port_present, |
| 0, sizeof(aconnector->mst_downstream_port_present)); |
| #endif |
| } |
| } |
| |
| drm_connector_update_edid_property( |
| &aconnector->base, aconnector->edid); |
| |
| ret = drm_add_edid_modes(connector, aconnector->edid); |
| |
| return ret; |
| } |
| |
| static struct drm_encoder * |
| dm_mst_atomic_best_encoder(struct drm_connector *connector, |
| struct drm_atomic_state *state) |
| { |
| struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state, |
| connector); |
| struct drm_device *dev = connector->dev; |
| struct amdgpu_device *adev = drm_to_adev(dev); |
| struct amdgpu_crtc *acrtc = to_amdgpu_crtc(connector_state->crtc); |
| |
| return &adev->dm.mst_encoders[acrtc->crtc_id].base; |
| } |
| |
| static int |
| dm_dp_mst_detect(struct drm_connector *connector, |
| struct drm_modeset_acquire_ctx *ctx, bool force) |
| { |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| struct amdgpu_dm_connector *master = aconnector->mst_port; |
| struct drm_dp_mst_port *port = aconnector->port; |
| int connection_status; |
| |
| if (drm_connector_is_unregistered(connector)) |
| return connector_status_disconnected; |
| |
| connection_status = drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr, |
| aconnector->port); |
| |
| if (port->pdt != DP_PEER_DEVICE_NONE && !port->dpcd_rev) { |
| uint8_t dpcd_rev; |
| int ret; |
| |
| ret = drm_dp_dpcd_readb(&port->aux, DP_DP13_DPCD_REV, &dpcd_rev); |
| |
| if (ret == 1) { |
| port->dpcd_rev = dpcd_rev; |
| |
| /* Could be DP1.2 DP Rx case*/ |
| if (!dpcd_rev) { |
| ret = drm_dp_dpcd_readb(&port->aux, DP_DPCD_REV, &dpcd_rev); |
| |
| if (ret == 1) |
| port->dpcd_rev = dpcd_rev; |
| } |
| |
| if (!dpcd_rev) |
| DRM_DEBUG_KMS("Can't decide DPCD revision number!"); |
| } |
| |
| /* |
| * Could be legacy sink, logical port etc on DP1.2. |
| * Will get Nack under these cases when issue remote |
| * DPCD read. |
| */ |
| if (ret != 1) |
| DRM_DEBUG_KMS("Can't access DPCD"); |
| } else if (port->pdt == DP_PEER_DEVICE_NONE) { |
| port->dpcd_rev = 0; |
| } |
| |
| /* |
| * Release dc_sink for connector which unplug event is notified by CSN msg |
| */ |
| if (connection_status == connector_status_disconnected && aconnector->dc_sink) { |
| if (aconnector->dc_link->sink_count) |
| dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink); |
| |
| dc_sink_release(aconnector->dc_sink); |
| aconnector->dc_sink = NULL; |
| aconnector->edid = NULL; |
| |
| amdgpu_dm_set_mst_status(&aconnector->mst_status, |
| MST_REMOTE_EDID | MST_ALLOCATE_NEW_PAYLOAD | MST_CLEAR_ALLOCATED_PAYLOAD, |
| false); |
| } |
| |
| return connection_status; |
| } |
| |
| static int dm_dp_mst_atomic_check(struct drm_connector *connector, |
| struct drm_atomic_state *state) |
| { |
| struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); |
| struct drm_dp_mst_topology_mgr *mst_mgr = &aconnector->mst_port->mst_mgr; |
| struct drm_dp_mst_port *mst_port = aconnector->port; |
| |
| return drm_dp_atomic_release_time_slots(state, mst_mgr, mst_port); |
| } |
| |
| 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, |
| .atomic_best_encoder = dm_mst_atomic_best_encoder, |
| .detect_ctx = dm_dp_mst_detect, |
| .atomic_check = dm_dp_mst_atomic_check, |
| }; |
| |
| static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder) |
| { |
| drm_encoder_cleanup(encoder); |
| } |
| |
| static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = { |
| .destroy = amdgpu_dm_encoder_destroy, |
| }; |
| |
| void |
| dm_dp_create_fake_mst_encoders(struct amdgpu_device *adev) |
| { |
| struct drm_device *dev = adev_to_drm(adev); |
| int i; |
| |
| for (i = 0; i < adev->dm.display_indexes_num; i++) { |
| struct amdgpu_encoder *amdgpu_encoder = &adev->dm.mst_encoders[i]; |
| struct drm_encoder *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); |
| } |
| } |
| |
| 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 = drm_to_adev(dev); |
| struct amdgpu_dm_connector *aconnector; |
| struct drm_connector *connector; |
| int i; |
| |
| aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL); |
| if (!aconnector) |
| return NULL; |
| |
| connector = &aconnector->base; |
| aconnector->port = port; |
| aconnector->mst_port = master; |
| amdgpu_dm_set_mst_status(&aconnector->mst_status, |
| MST_PROBE, true); |
| |
| 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); |
| |
| for (i = 0; i < adev->dm.display_indexes_num; i++) { |
| drm_connector_attach_encoder(&aconnector->base, |
| &adev->dm.mst_encoders[i].base); |
| } |
| |
| connector->max_bpc_property = master->base.max_bpc_property; |
| if (connector->max_bpc_property) |
| drm_connector_attach_max_bpc_property(connector, 8, 16); |
| |
| connector->vrr_capable_property = master->base.vrr_capable_property; |
| if (connector->vrr_capable_property) |
| drm_connector_attach_vrr_capable_property(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_connector_set_path_property(connector, pathprop); |
| |
| /* |
| * Initialize connector state before adding the connectror to drm and |
| * framebuffer lists |
| */ |
| amdgpu_dm_connector_funcs_reset(connector); |
| |
| drm_dp_mst_get_port_malloc(port); |
| |
| return connector; |
| } |
| |
| static const struct drm_dp_mst_topology_cbs dm_mst_cbs = { |
| .add_connector = dm_dp_add_mst_connector, |
| }; |
| |
| void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, |
| struct amdgpu_dm_connector *aconnector, |
| int link_index) |
| { |
| struct dc_link_settings max_link_enc_cap = {0}; |
| |
| aconnector->dm_dp_aux.aux.name = |
| kasprintf(GFP_KERNEL, "AMDGPU DM aux hw bus %d", |
| link_index); |
| aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer; |
| aconnector->dm_dp_aux.aux.drm_dev = dm->ddev; |
| aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc; |
| |
| drm_dp_aux_init(&aconnector->dm_dp_aux.aux); |
| drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux, |
| &aconnector->base); |
| |
| if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_eDP) |
| return; |
| |
| dc_link_dp_get_max_link_enc_cap(aconnector->dc_link, &max_link_enc_cap); |
| aconnector->mst_mgr.cbs = &dm_mst_cbs; |
| drm_dp_mst_topology_mgr_init(&aconnector->mst_mgr, adev_to_drm(dm->adev), |
| &aconnector->dm_dp_aux.aux, 16, 4, aconnector->connector_id); |
| |
| drm_connector_attach_dp_subconnector_property(&aconnector->base); |
| } |
| |
| int dm_mst_get_pbn_divider(struct dc_link *link) |
| { |
| if (!link) |
| return 0; |
| |
| return dc_link_bandwidth_kbps(link, |
| dc_link_get_link_cap(link)) / (8 * 1000 * 54); |
| } |
| |
| #if defined(CONFIG_DRM_AMD_DC_DCN) |
| |
| struct dsc_mst_fairness_params { |
| struct dc_crtc_timing *timing; |
| struct dc_sink *sink; |
| struct dc_dsc_bw_range bw_range; |
| bool compression_possible; |
| struct drm_dp_mst_port *port; |
| enum dsc_clock_force_state clock_force_enable; |
| uint32_t num_slices_h; |
| uint32_t num_slices_v; |
| uint32_t bpp_overwrite; |
| struct amdgpu_dm_connector *aconnector; |
| }; |
| |
| static int kbps_to_peak_pbn(int kbps) |
| { |
| u64 peak_kbps = kbps; |
| |
| peak_kbps *= 1006; |
| peak_kbps = div_u64(peak_kbps, 1000); |
| return (int) DIV64_U64_ROUND_UP(peak_kbps * 64, (54 * 8 * 1000)); |
| } |
| |
| static void set_dsc_configs_from_fairness_vars(struct dsc_mst_fairness_params *params, |
| struct dsc_mst_fairness_vars *vars, |
| int count, |
| int k) |
| { |
| struct drm_connector *drm_connector; |
| int i; |
| |
| for (i = 0; i < count; i++) { |
| drm_connector = ¶ms[i].aconnector->base; |
| |
| memset(¶ms[i].timing->dsc_cfg, 0, sizeof(params[i].timing->dsc_cfg)); |
| if (vars[i + k].dsc_enabled && dc_dsc_compute_config( |
| params[i].sink->ctx->dc->res_pool->dscs[0], |
| ¶ms[i].sink->dsc_caps.dsc_dec_caps, |
| params[i].sink->ctx->dc->debug.dsc_min_slice_height_override, |
| drm_connector->display_info.max_dsc_bpp, |
| 0, |
| params[i].timing, |
| ¶ms[i].timing->dsc_cfg)) { |
| params[i].timing->flags.DSC = 1; |
| |
| if (params[i].bpp_overwrite) |
| params[i].timing->dsc_cfg.bits_per_pixel = params[i].bpp_overwrite; |
| else |
| params[i].timing->dsc_cfg.bits_per_pixel = vars[i + k].bpp_x16; |
| |
| if (params[i].num_slices_h) |
| params[i].timing->dsc_cfg.num_slices_h = params[i].num_slices_h; |
| |
| if (params[i].num_slices_v) |
| params[i].timing->dsc_cfg.num_slices_v = params[i].num_slices_v; |
| } else { |
| params[i].timing->flags.DSC = 0; |
| } |
| params[i].timing->dsc_cfg.mst_pbn = vars[i + k].pbn; |
| } |
| |
| for (i = 0; i < count; i++) { |
| if (params[i].sink) { |
| if (params[i].sink->sink_signal != SIGNAL_TYPE_VIRTUAL && |
| params[i].sink->sink_signal != SIGNAL_TYPE_NONE) |
| DRM_DEBUG_DRIVER("%s i=%d dispname=%s\n", __func__, i, |
| params[i].sink->edid_caps.display_name); |
| } |
| |
| DRM_DEBUG_DRIVER("dsc=%d bits_per_pixel=%d pbn=%d\n", |
| params[i].timing->flags.DSC, |
| params[i].timing->dsc_cfg.bits_per_pixel, |
| vars[i + k].pbn); |
| } |
| } |
| |
| static int bpp_x16_from_pbn(struct dsc_mst_fairness_params param, int pbn) |
| { |
| struct dc_dsc_config dsc_config; |
| u64 kbps; |
| |
| struct drm_connector *drm_connector = ¶m.aconnector->base; |
| uint32_t max_dsc_target_bpp_limit_override = |
| drm_connector->display_info.max_dsc_bpp; |
| |
| kbps = div_u64((u64)pbn * 994 * 8 * 54, 64); |
| dc_dsc_compute_config( |
| param.sink->ctx->dc->res_pool->dscs[0], |
| ¶m.sink->dsc_caps.dsc_dec_caps, |
| param.sink->ctx->dc->debug.dsc_min_slice_height_override, |
| max_dsc_target_bpp_limit_override, |
| (int) kbps, param.timing, &dsc_config); |
| |
| return dsc_config.bits_per_pixel; |
| } |
| |
| static int increase_dsc_bpp(struct drm_atomic_state *state, |
| struct drm_dp_mst_topology_state *mst_state, |
| struct dc_link *dc_link, |
| struct dsc_mst_fairness_params *params, |
| struct dsc_mst_fairness_vars *vars, |
| int count, |
| int k) |
| { |
| int i; |
| bool bpp_increased[MAX_PIPES]; |
| int initial_slack[MAX_PIPES]; |
| int min_initial_slack; |
| int next_index; |
| int remaining_to_increase = 0; |
| int link_timeslots_used; |
| int fair_pbn_alloc; |
| int ret = 0; |
| |
| for (i = 0; i < count; i++) { |
| if (vars[i + k].dsc_enabled) { |
| initial_slack[i] = |
| kbps_to_peak_pbn(params[i].bw_range.max_kbps) - vars[i + k].pbn; |
| bpp_increased[i] = false; |
| remaining_to_increase += 1; |
| } else { |
| initial_slack[i] = 0; |
| bpp_increased[i] = true; |
| } |
| } |
| |
| while (remaining_to_increase) { |
| next_index = -1; |
| min_initial_slack = -1; |
| for (i = 0; i < count; i++) { |
| if (!bpp_increased[i]) { |
| if (min_initial_slack == -1 || min_initial_slack > initial_slack[i]) { |
| min_initial_slack = initial_slack[i]; |
| next_index = i; |
| } |
| } |
| } |
| |
| if (next_index == -1) |
| break; |
| |
| link_timeslots_used = 0; |
| |
| for (i = 0; i < count; i++) |
| link_timeslots_used += DIV_ROUND_UP(vars[i + k].pbn, mst_state->pbn_div); |
| |
| fair_pbn_alloc = |
| (63 - link_timeslots_used) / remaining_to_increase * mst_state->pbn_div; |
| |
| if (initial_slack[next_index] > fair_pbn_alloc) { |
| vars[next_index].pbn += fair_pbn_alloc; |
| ret = drm_dp_atomic_find_time_slots(state, |
| params[next_index].port->mgr, |
| params[next_index].port, |
| vars[next_index].pbn); |
| if (ret < 0) |
| return ret; |
| |
| ret = drm_dp_mst_atomic_check(state); |
| if (ret == 0) { |
| vars[next_index].bpp_x16 = bpp_x16_from_pbn(params[next_index], vars[next_index].pbn); |
| } else { |
| vars[next_index].pbn -= fair_pbn_alloc; |
| ret = drm_dp_atomic_find_time_slots(state, |
| params[next_index].port->mgr, |
| params[next_index].port, |
| vars[next_index].pbn); |
| if (ret < 0) |
| return ret; |
| } |
| } else { |
| vars[next_index].pbn += initial_slack[next_index]; |
| ret = drm_dp_atomic_find_time_slots(state, |
| params[next_index].port->mgr, |
| params[next_index].port, |
| vars[next_index].pbn); |
| if (ret < 0) |
| return ret; |
| |
| ret = drm_dp_mst_atomic_check(state); |
| if (ret == 0) { |
| vars[next_index].bpp_x16 = params[next_index].bw_range.max_target_bpp_x16; |
| } else { |
| vars[next_index].pbn -= initial_slack[next_index]; |
| ret = drm_dp_atomic_find_time_slots(state, |
| params[next_index].port->mgr, |
| params[next_index].port, |
| vars[next_index].pbn); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| bpp_increased[next_index] = true; |
| remaining_to_increase--; |
| } |
| return 0; |
| } |
| |
| static int try_disable_dsc(struct drm_atomic_state *state, |
| struct dc_link *dc_link, |
| struct dsc_mst_fairness_params *params, |
| struct dsc_mst_fairness_vars *vars, |
| int count, |
| int k) |
| { |
| int i; |
| bool tried[MAX_PIPES]; |
| int kbps_increase[MAX_PIPES]; |
| int max_kbps_increase; |
| int next_index; |
| int remaining_to_try = 0; |
| int ret; |
| |
| for (i = 0; i < count; i++) { |
| if (vars[i + k].dsc_enabled |
| && vars[i + k].bpp_x16 == params[i].bw_range.max_target_bpp_x16 |
| && params[i].clock_force_enable == DSC_CLK_FORCE_DEFAULT) { |
| kbps_increase[i] = params[i].bw_range.stream_kbps - params[i].bw_range.max_kbps; |
| tried[i] = false; |
| remaining_to_try += 1; |
| } else { |
| kbps_increase[i] = 0; |
| tried[i] = true; |
| } |
| } |
| |
| while (remaining_to_try) { |
| next_index = -1; |
| max_kbps_increase = -1; |
| for (i = 0; i < count; i++) { |
| if (!tried[i]) { |
| if (max_kbps_increase == -1 || max_kbps_increase < kbps_increase[i]) { |
| max_kbps_increase = kbps_increase[i]; |
| next_index = i; |
| } |
| } |
| } |
| |
| if (next_index == -1) |
| break; |
| |
| vars[next_index].pbn = kbps_to_peak_pbn(params[next_index].bw_range.stream_kbps); |
| ret = drm_dp_atomic_find_time_slots(state, |
| params[next_index].port->mgr, |
| params[next_index].port, |
| vars[next_index].pbn); |
| if (ret < 0) |
| return ret; |
| |
| ret = drm_dp_mst_atomic_check(state); |
| if (ret == 0) { |
| vars[next_index].dsc_enabled = false; |
| vars[next_index].bpp_x16 = 0; |
| } else { |
| vars[next_index].pbn = kbps_to_peak_pbn(params[next_index].bw_range.max_kbps); |
| ret = drm_dp_atomic_find_time_slots(state, |
| params[next_index].port->mgr, |
| params[next_index].port, |
| vars[next_index].pbn); |
| if (ret < 0) |
| return ret; |
| } |
| |
| tried[next_index] = true; |
| remaining_to_try--; |
| } |
| return 0; |
| } |
| |
| static int compute_mst_dsc_configs_for_link(struct drm_atomic_state *state, |
| struct dc_state *dc_state, |
| struct dc_link *dc_link, |
| struct dsc_mst_fairness_vars *vars, |
| struct drm_dp_mst_topology_mgr *mgr, |
| int *link_vars_start_index) |
| { |
| struct dc_stream_state *stream; |
| struct dsc_mst_fairness_params params[MAX_PIPES]; |
| struct amdgpu_dm_connector *aconnector; |
| struct drm_dp_mst_topology_state *mst_state = drm_atomic_get_mst_topology_state(state, mgr); |
| int count = 0; |
| int i, k, ret; |
| bool debugfs_overwrite = false; |
| |
| memset(params, 0, sizeof(params)); |
| |
| if (IS_ERR(mst_state)) |
| return PTR_ERR(mst_state); |
| |
| mst_state->pbn_div = dm_mst_get_pbn_divider(dc_link); |
| #if defined(CONFIG_DRM_AMD_DC_DCN) |
| drm_dp_mst_update_slots(mst_state, dc_link_dp_mst_decide_link_encoding_format(dc_link)); |
| #endif |
| |
| /* Set up params */ |
| for (i = 0; i < dc_state->stream_count; i++) { |
| struct dc_dsc_policy dsc_policy = {0}; |
| |
| stream = dc_state->streams[i]; |
| |
| if (stream->link != dc_link) |
| continue; |
| |
| aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; |
| if (!aconnector) |
| continue; |
| |
| if (!aconnector->port) |
| continue; |
| |
| stream->timing.flags.DSC = 0; |
| |
| params[count].timing = &stream->timing; |
| params[count].sink = stream->sink; |
| params[count].aconnector = aconnector; |
| params[count].port = aconnector->port; |
| params[count].clock_force_enable = aconnector->dsc_settings.dsc_force_enable; |
| if (params[count].clock_force_enable == DSC_CLK_FORCE_ENABLE) |
| debugfs_overwrite = true; |
| params[count].num_slices_h = aconnector->dsc_settings.dsc_num_slices_h; |
| params[count].num_slices_v = aconnector->dsc_settings.dsc_num_slices_v; |
| params[count].bpp_overwrite = aconnector->dsc_settings.dsc_bits_per_pixel; |
| params[count].compression_possible = stream->sink->dsc_caps.dsc_dec_caps.is_dsc_supported; |
| dc_dsc_get_policy_for_timing(params[count].timing, 0, &dsc_policy); |
| if (!dc_dsc_compute_bandwidth_range( |
| stream->sink->ctx->dc->res_pool->dscs[0], |
| stream->sink->ctx->dc->debug.dsc_min_slice_height_override, |
| dsc_policy.min_target_bpp * 16, |
| dsc_policy.max_target_bpp * 16, |
| &stream->sink->dsc_caps.dsc_dec_caps, |
| &stream->timing, ¶ms[count].bw_range)) |
| params[count].bw_range.stream_kbps = dc_bandwidth_in_kbps_from_timing(&stream->timing); |
| |
| count++; |
| } |
| |
| if (count == 0) { |
| ASSERT(0); |
| return 0; |
| } |
| |
| /* k is start index of vars for current phy link used by mst hub */ |
| k = *link_vars_start_index; |
| /* set vars start index for next mst hub phy link */ |
| *link_vars_start_index += count; |
| |
| /* Try no compression */ |
| for (i = 0; i < count; i++) { |
| vars[i + k].aconnector = params[i].aconnector; |
| vars[i + k].pbn = kbps_to_peak_pbn(params[i].bw_range.stream_kbps); |
| vars[i + k].dsc_enabled = false; |
| vars[i + k].bpp_x16 = 0; |
| ret = drm_dp_atomic_find_time_slots(state, params[i].port->mgr, params[i].port, |
| vars[i + k].pbn); |
| if (ret < 0) |
| return ret; |
| } |
| ret = drm_dp_mst_atomic_check(state); |
| if (ret == 0 && !debugfs_overwrite) { |
| set_dsc_configs_from_fairness_vars(params, vars, count, k); |
| return 0; |
| } else if (ret != -ENOSPC) { |
| return ret; |
| } |
| |
| /* Try max compression */ |
| for (i = 0; i < count; i++) { |
| if (params[i].compression_possible && params[i].clock_force_enable != DSC_CLK_FORCE_DISABLE) { |
| vars[i + k].pbn = kbps_to_peak_pbn(params[i].bw_range.min_kbps); |
| vars[i + k].dsc_enabled = true; |
| vars[i + k].bpp_x16 = params[i].bw_range.min_target_bpp_x16; |
| ret = drm_dp_atomic_find_time_slots(state, params[i].port->mgr, |
| params[i].port, vars[i + k].pbn); |
| if (ret < 0) |
| return ret; |
| } else { |
| vars[i + k].pbn = kbps_to_peak_pbn(params[i].bw_range.stream_kbps); |
| vars[i + k].dsc_enabled = false; |
| vars[i + k].bpp_x16 = 0; |
| ret = drm_dp_atomic_find_time_slots(state, params[i].port->mgr, |
| params[i].port, vars[i + k].pbn); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| ret = drm_dp_mst_atomic_check(state); |
| if (ret != 0) |
| return ret; |
| |
| /* Optimize degree of compression */ |
| ret = increase_dsc_bpp(state, mst_state, dc_link, params, vars, count, k); |
| if (ret < 0) |
| return ret; |
| |
| ret = try_disable_dsc(state, dc_link, params, vars, count, k); |
| if (ret < 0) |
| return ret; |
| |
| set_dsc_configs_from_fairness_vars(params, vars, count, k); |
| |
| return 0; |
| } |
| |
| static bool is_dsc_need_re_compute( |
| struct drm_atomic_state *state, |
| struct dc_state *dc_state, |
| struct dc_link *dc_link) |
| { |
| int i, j; |
| bool is_dsc_need_re_compute = false; |
| struct amdgpu_dm_connector *stream_on_link[MAX_PIPES]; |
| int new_stream_on_link_num = 0; |
| struct amdgpu_dm_connector *aconnector; |
| struct dc_stream_state *stream; |
| const struct dc *dc = dc_link->dc; |
| |
| /* only check phy used by dsc mst branch */ |
| if (dc_link->type != dc_connection_mst_branch) |
| return false; |
| |
| if (!(dc_link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT || |
| dc_link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_PASSTHROUGH_SUPPORT)) |
| return false; |
| |
| for (i = 0; i < MAX_PIPES; i++) |
| stream_on_link[i] = NULL; |
| |
| /* check if there is mode change in new request */ |
| for (i = 0; i < dc_state->stream_count; i++) { |
| struct drm_crtc_state *new_crtc_state; |
| struct drm_connector_state *new_conn_state; |
| |
| stream = dc_state->streams[i]; |
| if (!stream) |
| continue; |
| |
| /* check if stream using the same link for mst */ |
| if (stream->link != dc_link) |
| continue; |
| |
| aconnector = (struct amdgpu_dm_connector *) stream->dm_stream_context; |
| if (!aconnector) |
| continue; |
| |
| stream_on_link[new_stream_on_link_num] = aconnector; |
| new_stream_on_link_num++; |
| |
| new_conn_state = drm_atomic_get_new_connector_state(state, &aconnector->base); |
| if (!new_conn_state) |
| continue; |
| |
| if (IS_ERR(new_conn_state)) |
| continue; |
| |
| if (!new_conn_state->crtc) |
| continue; |
| |
| new_crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
| if (!new_crtc_state) |
| continue; |
| |
| if (IS_ERR(new_crtc_state)) |
| continue; |
| |
| if (new_crtc_state->enable && new_crtc_state->active) { |
| if (new_crtc_state->mode_changed || new_crtc_state->active_changed || |
| new_crtc_state->connectors_changed) |
| return true; |
| } |
| } |
| |
| /* check current_state if there stream on link but it is not in |
| * new request state |
| */ |
| for (i = 0; i < dc->current_state->stream_count; i++) { |
| stream = dc->current_state->streams[i]; |
| /* only check stream on the mst hub */ |
| if (stream->link != dc_link) |
| continue; |
| |
| aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; |
| if (!aconnector) |
| continue; |
| |
| for (j = 0; j < new_stream_on_link_num; j++) { |
| if (stream_on_link[j]) { |
| if (aconnector == stream_on_link[j]) |
| break; |
| } |
| } |
| |
| if (j == new_stream_on_link_num) { |
| /* not in new state */ |
| is_dsc_need_re_compute = true; |
| break; |
| } |
| } |
| |
| return is_dsc_need_re_compute; |
| } |
| |
| int compute_mst_dsc_configs_for_state(struct drm_atomic_state *state, |
| struct dc_state *dc_state, |
| struct dsc_mst_fairness_vars *vars) |
| { |
| int i, j; |
| struct dc_stream_state *stream; |
| bool computed_streams[MAX_PIPES]; |
| struct amdgpu_dm_connector *aconnector; |
| struct drm_dp_mst_topology_mgr *mst_mgr; |
| int link_vars_start_index = 0; |
| int ret = 0; |
| |
| for (i = 0; i < dc_state->stream_count; i++) |
| computed_streams[i] = false; |
| |
| for (i = 0; i < dc_state->stream_count; i++) { |
| stream = dc_state->streams[i]; |
| |
| if (stream->signal != SIGNAL_TYPE_DISPLAY_PORT_MST) |
| continue; |
| |
| aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; |
| |
| if (!aconnector || !aconnector->dc_sink || !aconnector->port) |
| continue; |
| |
| if (!aconnector->dc_sink->dsc_caps.dsc_dec_caps.is_dsc_supported) |
| continue; |
| |
| if (computed_streams[i]) |
| continue; |
| |
| if (dcn20_remove_stream_from_ctx(stream->ctx->dc, dc_state, stream) != DC_OK) |
| return -EINVAL; |
| |
| if (!is_dsc_need_re_compute(state, dc_state, stream->link)) |
| continue; |
| |
| mst_mgr = aconnector->port->mgr; |
| ret = compute_mst_dsc_configs_for_link(state, dc_state, stream->link, vars, mst_mgr, |
| &link_vars_start_index); |
| if (ret != 0) |
| return ret; |
| |
| for (j = 0; j < dc_state->stream_count; j++) { |
| if (dc_state->streams[j]->link == stream->link) |
| computed_streams[j] = true; |
| } |
| } |
| |
| for (i = 0; i < dc_state->stream_count; i++) { |
| stream = dc_state->streams[i]; |
| |
| if (stream->timing.flags.DSC == 1) |
| if (dc_stream_add_dsc_to_resource(stream->ctx->dc, dc_state, stream) != DC_OK) |
| return -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static int pre_compute_mst_dsc_configs_for_state(struct drm_atomic_state *state, |
| struct dc_state *dc_state, |
| struct dsc_mst_fairness_vars *vars) |
| { |
| int i, j; |
| struct dc_stream_state *stream; |
| bool computed_streams[MAX_PIPES]; |
| struct amdgpu_dm_connector *aconnector; |
| struct drm_dp_mst_topology_mgr *mst_mgr; |
| int link_vars_start_index = 0; |
| int ret = 0; |
| |
| for (i = 0; i < dc_state->stream_count; i++) |
| computed_streams[i] = false; |
| |
| for (i = 0; i < dc_state->stream_count; i++) { |
| stream = dc_state->streams[i]; |
| |
| if (stream->signal != SIGNAL_TYPE_DISPLAY_PORT_MST) |
| continue; |
| |
| aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; |
| |
| if (!aconnector || !aconnector->dc_sink || !aconnector->port) |
| continue; |
| |
| if (!aconnector->dc_sink->dsc_caps.dsc_dec_caps.is_dsc_supported) |
| continue; |
| |
| if (computed_streams[i]) |
| continue; |
| |
| if (!is_dsc_need_re_compute(state, dc_state, stream->link)) |
| continue; |
| |
| mst_mgr = aconnector->port->mgr; |
| ret = compute_mst_dsc_configs_for_link(state, dc_state, stream->link, vars, mst_mgr, |
| &link_vars_start_index); |
| if (ret != 0) |
| return ret; |
| |
| for (j = 0; j < dc_state->stream_count; j++) { |
| if (dc_state->streams[j]->link == stream->link) |
| computed_streams[j] = true; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int find_crtc_index_in_state_by_stream(struct drm_atomic_state *state, |
| struct dc_stream_state *stream) |
| { |
| int i; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *new_state, *old_state; |
| |
| for_each_oldnew_crtc_in_state(state, crtc, old_state, new_state, i) { |
| struct dm_crtc_state *dm_state = to_dm_crtc_state(new_state); |
| |
| if (dm_state->stream == stream) |
| return i; |
| } |
| return -1; |
| } |
| |
| static bool is_link_to_dschub(struct dc_link *dc_link) |
| { |
| union dpcd_dsc_basic_capabilities *dsc_caps = |
| &dc_link->dpcd_caps.dsc_caps.dsc_basic_caps; |
| |
| /* only check phy used by dsc mst branch */ |
| if (dc_link->type != dc_connection_mst_branch) |
| return false; |
| |
| if (!(dsc_caps->fields.dsc_support.DSC_SUPPORT || |
| dsc_caps->fields.dsc_support.DSC_PASSTHROUGH_SUPPORT)) |
| return false; |
| return true; |
| } |
| |
| static bool is_dsc_precompute_needed(struct drm_atomic_state *state) |
| { |
| int i; |
| struct drm_crtc *crtc; |
| struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
| bool ret = false; |
| |
| for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
| struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(new_crtc_state); |
| |
| if (!amdgpu_dm_find_first_crtc_matching_connector(state, crtc)) { |
| ret = false; |
| break; |
| } |
| if (dm_crtc_state->stream && dm_crtc_state->stream->link) |
| if (is_link_to_dschub(dm_crtc_state->stream->link)) |
| ret = true; |
| } |
| return ret; |
| } |
| |
| int pre_validate_dsc(struct drm_atomic_state *state, |
| struct dm_atomic_state **dm_state_ptr, |
| struct dsc_mst_fairness_vars *vars) |
| { |
| int i; |
| struct dm_atomic_state *dm_state; |
| struct dc_state *local_dc_state = NULL; |
| int ret = 0; |
| |
| if (!is_dsc_precompute_needed(state)) { |
| DRM_INFO_ONCE("DSC precompute is not needed.\n"); |
| return 0; |
| } |
| ret = dm_atomic_get_state(state, dm_state_ptr); |
| if (ret != 0) { |
| DRM_INFO_ONCE("dm_atomic_get_state() failed\n"); |
| return ret; |
| } |
| dm_state = *dm_state_ptr; |
| |
| /* |
| * create local vailable for dc_state. copy content of streams of dm_state->context |
| * to local variable. make sure stream pointer of local variable not the same as stream |
| * from dm_state->context. |
| */ |
| |
| local_dc_state = kmemdup(dm_state->context, sizeof(struct dc_state), GFP_KERNEL); |
| if (!local_dc_state) |
| return -ENOMEM; |
| |
| for (i = 0; i < local_dc_state->stream_count; i++) { |
| struct dc_stream_state *stream = dm_state->context->streams[i]; |
| int ind = find_crtc_index_in_state_by_stream(state, stream); |
| |
| if (ind >= 0) { |
| struct amdgpu_dm_connector *aconnector; |
| struct drm_connector_state *drm_new_conn_state; |
| struct dm_connector_state *dm_new_conn_state; |
| struct dm_crtc_state *dm_old_crtc_state; |
| |
| aconnector = |
| amdgpu_dm_find_first_crtc_matching_connector(state, |
| state->crtcs[ind].ptr); |
| drm_new_conn_state = |
| drm_atomic_get_new_connector_state(state, |
| &aconnector->base); |
| dm_new_conn_state = to_dm_connector_state(drm_new_conn_state); |
| dm_old_crtc_state = to_dm_crtc_state(state->crtcs[ind].old_state); |
| |
| local_dc_state->streams[i] = |
| create_validate_stream_for_sink(aconnector, |
| &state->crtcs[ind].new_state->mode, |
| dm_new_conn_state, |
| dm_old_crtc_state->stream); |
| if (local_dc_state->streams[i] == NULL) { |
| ret = -EINVAL; |
| break; |
| } |
| } |
| } |
| |
| if (ret != 0) |
| goto clean_exit; |
| |
| ret = pre_compute_mst_dsc_configs_for_state(state, local_dc_state, vars); |
| if (ret != 0) { |
| DRM_INFO_ONCE("pre_compute_mst_dsc_configs_for_state() failed\n"); |
| goto clean_exit; |
| } |
| |
| /* |
| * compare local_streams -> timing with dm_state->context, |
| * if the same set crtc_state->mode-change = 0; |
| */ |
| for (i = 0; i < local_dc_state->stream_count; i++) { |
| struct dc_stream_state *stream = dm_state->context->streams[i]; |
| |
| if (local_dc_state->streams[i] && |
| is_timing_changed(stream, local_dc_state->streams[i])) { |
| DRM_INFO_ONCE("crtc[%d] needs mode_changed\n", i); |
| } else { |
| int ind = find_crtc_index_in_state_by_stream(state, stream); |
| |
| if (ind >= 0) |
| state->crtcs[ind].new_state->mode_changed = 0; |
| } |
| } |
| clean_exit: |
| for (i = 0; i < local_dc_state->stream_count; i++) { |
| struct dc_stream_state *stream = dm_state->context->streams[i]; |
| |
| if (local_dc_state->streams[i] != stream) |
| dc_stream_release(local_dc_state->streams[i]); |
| } |
| |
| kfree(local_dc_state); |
| |
| return ret; |
| } |
| |
| static unsigned int kbps_from_pbn(unsigned int pbn) |
| { |
| unsigned int kbps = pbn; |
| |
| kbps *= (1000000 / PEAK_FACTOR_X1000); |
| kbps *= 8; |
| kbps *= 54; |
| kbps /= 64; |
| |
| return kbps; |
| } |
| |
| static bool is_dsc_common_config_possible(struct dc_stream_state *stream, |
| struct dc_dsc_bw_range *bw_range) |
| { |
| struct dc_dsc_policy dsc_policy = {0}; |
| |
| dc_dsc_get_policy_for_timing(&stream->timing, 0, &dsc_policy); |
| dc_dsc_compute_bandwidth_range(stream->sink->ctx->dc->res_pool->dscs[0], |
| stream->sink->ctx->dc->debug.dsc_min_slice_height_override, |
| dsc_policy.min_target_bpp * 16, |
| dsc_policy.max_target_bpp * 16, |
| &stream->sink->dsc_caps.dsc_dec_caps, |
| &stream->timing, bw_range); |
| |
| return bw_range->max_target_bpp_x16 && bw_range->min_target_bpp_x16; |
| } |
| #endif /* CONFIG_DRM_AMD_DC_DCN */ |
| |
| enum dc_status dm_dp_mst_is_port_support_mode( |
| struct amdgpu_dm_connector *aconnector, |
| struct dc_stream_state *stream) |
| { |
| int bpp, pbn, branch_max_throughput_mps = 0; |
| #if defined(CONFIG_DRM_AMD_DC_DCN) |
| struct dc_link_settings cur_link_settings; |
| unsigned int end_to_end_bw_in_kbps = 0; |
| unsigned int upper_link_bw_in_kbps = 0, down_link_bw_in_kbps = 0; |
| unsigned int max_compressed_bw_in_kbps = 0; |
| struct dc_dsc_bw_range bw_range = {0}; |
| struct drm_dp_mst_topology_mgr *mst_mgr; |
| |
| /* |
| * check if the mode could be supported if DSC pass-through is supported |
| * AND check if there enough bandwidth available to support the mode |
| * with DSC enabled. |
| */ |
| if (is_dsc_common_config_possible(stream, &bw_range) && |
| aconnector->port->passthrough_aux) { |
| mst_mgr = aconnector->port->mgr; |
| mutex_lock(&mst_mgr->lock); |
| |
| cur_link_settings = stream->link->verified_link_cap; |
| |
| upper_link_bw_in_kbps = dc_link_bandwidth_kbps(aconnector->dc_link, |
| &cur_link_settings |
| ); |
| down_link_bw_in_kbps = kbps_from_pbn(aconnector->port->full_pbn); |
| |
| /* pick the bottleneck */ |
| end_to_end_bw_in_kbps = min(upper_link_bw_in_kbps, |
| down_link_bw_in_kbps); |
| |
| mutex_unlock(&mst_mgr->lock); |
| |
| /* |
| * use the maximum dsc compression bandwidth as the required |
| * bandwidth for the mode |
| */ |
| max_compressed_bw_in_kbps = bw_range.min_kbps; |
| |
| if (end_to_end_bw_in_kbps < max_compressed_bw_in_kbps) { |
| DRM_DEBUG_DRIVER("Mode does not fit into DSC pass-through bandwidth validation\n"); |
| return DC_FAIL_BANDWIDTH_VALIDATE; |
| } |
| } else { |
| #endif |
| /* check if mode could be supported within full_pbn */ |
| bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3; |
| pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp, false); |
| |
| if (pbn > aconnector->port->full_pbn) |
| return DC_FAIL_BANDWIDTH_VALIDATE; |
| #if defined(CONFIG_DRM_AMD_DC_DCN) |
| } |
| #endif |
| |
| /* check is mst dsc output bandwidth branch_overall_throughput_0_mps */ |
| switch (stream->timing.pixel_encoding) { |
| case PIXEL_ENCODING_RGB: |
| case PIXEL_ENCODING_YCBCR444: |
| branch_max_throughput_mps = |
| aconnector->dc_sink->dsc_caps.dsc_dec_caps.branch_overall_throughput_0_mps; |
| break; |
| case PIXEL_ENCODING_YCBCR422: |
| case PIXEL_ENCODING_YCBCR420: |
| branch_max_throughput_mps = |
| aconnector->dc_sink->dsc_caps.dsc_dec_caps.branch_overall_throughput_1_mps; |
| break; |
| default: |
| break; |
| } |
| |
| if (branch_max_throughput_mps != 0 && |
| ((stream->timing.pix_clk_100hz / 10) > branch_max_throughput_mps * 1000)) |
| return DC_FAIL_BANDWIDTH_VALIDATE; |
| |
| return DC_OK; |
| } |