diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 657 |
1 files changed, 555 insertions, 102 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c index cc34a35d0bcb..6ff96b4bdda5 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c @@ -23,10 +23,10 @@ * */ +#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 <drm/drm_dp_mst_helper.h> -#include <drm/drm_dp_helper.h> #include "dm_services.h" #include "amdgpu.h" #include "amdgpu_dm.h" @@ -36,6 +36,7 @@ #include "dm_helpers.h" #include "dc_link_ddc.h" +#include "dc_link_dp.h" #include "ddc_service_types.h" #include "dpcd_defs.h" @@ -45,9 +46,10 @@ #include "amdgpu_dm_debugfs.h" #endif -#if defined(CONFIG_DRM_AMD_DC_DCN) #include "dc/dcn20/dcn20_resource.h" -#endif +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) @@ -55,6 +57,8 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, 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; @@ -73,6 +77,21 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, 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; @@ -139,11 +158,31 @@ amdgpu_dm_mst_connector_late_register(struct drm_connector *connector) static void amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector) { - struct amdgpu_dm_connector *amdgpu_dm_connector = + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); - struct drm_dp_mst_port *port = amdgpu_dm_connector->port; + 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 = { @@ -159,7 +198,7 @@ static const struct drm_connector_funcs dm_dp_mst_connector_funcs = { }; #if defined(CONFIG_DRM_AMD_DC_DCN) -static bool needs_dsc_aux_workaround(struct dc_link *link) +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) && @@ -209,6 +248,25 @@ static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnecto 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) @@ -224,6 +282,9 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector) 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); @@ -254,6 +315,8 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector) } 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) { @@ -289,6 +352,10 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector) 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 } } @@ -320,43 +387,74 @@ dm_dp_mst_detect(struct drm_connector *connector, { 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; - return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr, - aconnector->port); -} + connection_status = drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr, + aconnector->port); -static int dm_dp_mst_atomic_check(struct drm_connector *connector, - struct drm_atomic_state *state) -{ - struct drm_connector_state *new_conn_state = - drm_atomic_get_new_connector_state(state, connector); - struct drm_connector_state *old_conn_state = - drm_atomic_get_old_connector_state(state, connector); - struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); - struct drm_crtc_state *new_crtc_state; - struct drm_dp_mst_topology_mgr *mst_mgr; - struct drm_dp_mst_port *mst_port; + if (port->pdt != DP_PEER_DEVICE_NONE && !port->dpcd_rev) { + uint8_t dpcd_rev; + int ret; - mst_port = aconnector->port; - mst_mgr = &aconnector->mst_port->mst_mgr; + ret = drm_dp_dpcd_readb(&port->aux, DP_DP13_DPCD_REV, &dpcd_rev); - if (!old_conn_state->crtc) - return 0; + if (ret == 1) { + port->dpcd_rev = dpcd_rev; - if (new_conn_state->crtc) { - new_crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); - if (!new_crtc_state || - !drm_atomic_crtc_needs_modeset(new_crtc_state) || - new_crtc_state->enable) - return 0; + /* 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!"); } - return drm_dp_atomic_release_vcpi_slots(state, - mst_mgr, - mst_port); + /* + * 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 = { @@ -419,6 +517,8 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, 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, @@ -498,15 +598,8 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, 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, - max_link_enc_cap.lane_count, - drm_dp_bw_code_to_link_rate(max_link_enc_cap.link_rate), - aconnector->connector_id); + 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); } @@ -576,6 +669,21 @@ static void set_dsc_configs_from_fairness_vars(struct dsc_mst_fairness_params *p } 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); } } @@ -595,7 +703,8 @@ static int bpp_x16_from_pbn(struct dsc_mst_fairness_params param, int pbn) return dsc_config.bits_per_pixel; } -static void increase_dsc_bpp(struct drm_atomic_state *state, +static bool 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, @@ -608,12 +717,9 @@ static void increase_dsc_bpp(struct drm_atomic_state *state, int min_initial_slack; int next_index; int remaining_to_increase = 0; - int pbn_per_timeslot; int link_timeslots_used; int fair_pbn_alloc; - pbn_per_timeslot = dm_mst_get_pbn_divider(dc_link); - for (i = 0; i < count; i++) { if (vars[i + k].dsc_enabled) { initial_slack[i] = @@ -644,56 +750,54 @@ static void increase_dsc_bpp(struct drm_atomic_state *state, link_timeslots_used = 0; for (i = 0; i < count; i++) - link_timeslots_used += DIV_ROUND_UP(vars[i + k].pbn, pbn_per_timeslot); + link_timeslots_used += DIV_ROUND_UP(vars[i + k].pbn, mst_state->pbn_div); - fair_pbn_alloc = (63 - link_timeslots_used) / remaining_to_increase * pbn_per_timeslot; + 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; - if (drm_dp_atomic_find_vcpi_slots(state, + if (drm_dp_atomic_find_time_slots(state, params[next_index].port->mgr, params[next_index].port, - vars[next_index].pbn, - pbn_per_timeslot) < 0) - return; + vars[next_index].pbn) < 0) + return false; if (!drm_dp_mst_atomic_check(state)) { vars[next_index].bpp_x16 = bpp_x16_from_pbn(params[next_index], vars[next_index].pbn); } else { vars[next_index].pbn -= fair_pbn_alloc; - if (drm_dp_atomic_find_vcpi_slots(state, + if (drm_dp_atomic_find_time_slots(state, params[next_index].port->mgr, params[next_index].port, - vars[next_index].pbn, - pbn_per_timeslot) < 0) - return; + vars[next_index].pbn) < 0) + return false; } } else { vars[next_index].pbn += initial_slack[next_index]; - if (drm_dp_atomic_find_vcpi_slots(state, + if (drm_dp_atomic_find_time_slots(state, params[next_index].port->mgr, params[next_index].port, - vars[next_index].pbn, - pbn_per_timeslot) < 0) - return; + vars[next_index].pbn) < 0) + return false; if (!drm_dp_mst_atomic_check(state)) { vars[next_index].bpp_x16 = params[next_index].bw_range.max_target_bpp_x16; } else { vars[next_index].pbn -= initial_slack[next_index]; - if (drm_dp_atomic_find_vcpi_slots(state, + if (drm_dp_atomic_find_time_slots(state, params[next_index].port->mgr, params[next_index].port, - vars[next_index].pbn, - pbn_per_timeslot) < 0) - return; + vars[next_index].pbn) < 0) + return false; } } bpp_increased[next_index] = true; remaining_to_increase--; } + return true; } -static void try_disable_dsc(struct drm_atomic_state *state, +static bool 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, @@ -736,46 +840,55 @@ static void try_disable_dsc(struct drm_atomic_state *state, break; vars[next_index].pbn = kbps_to_peak_pbn(params[next_index].bw_range.stream_kbps); - if (drm_dp_atomic_find_vcpi_slots(state, + if (drm_dp_atomic_find_time_slots(state, params[next_index].port->mgr, params[next_index].port, - vars[next_index].pbn, - dm_mst_get_pbn_divider(dc_link)) < 0) - return; + vars[next_index].pbn) < 0) + return false; if (!drm_dp_mst_atomic_check(state)) { 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); - if (drm_dp_atomic_find_vcpi_slots(state, + if (drm_dp_atomic_find_time_slots(state, params[next_index].port->mgr, params[next_index].port, - vars[next_index].pbn, - dm_mst_get_pbn_divider(dc_link)) < 0) - return; + vars[next_index].pbn) < 0) + return false; } tried[next_index] = true; remaining_to_try--; } + return true; } static bool 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) { - int i, k; 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; bool debugfs_overwrite = false; memset(params, 0, sizeof(params)); + if (IS_ERR(mst_state)) + return false; + + 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}; @@ -834,11 +947,8 @@ static bool compute_mst_dsc_configs_for_link(struct drm_atomic_state *state, 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; - if (drm_dp_atomic_find_vcpi_slots(state, - params[i].port->mgr, - params[i].port, - vars[i + k].pbn, - dm_mst_get_pbn_divider(dc_link)) < 0) + if (drm_dp_atomic_find_time_slots(state, params[i].port->mgr, params[i].port, + vars[i + k].pbn) < 0) return false; } if (!drm_dp_mst_atomic_check(state) && !debugfs_overwrite) { @@ -852,21 +962,15 @@ static bool compute_mst_dsc_configs_for_link(struct drm_atomic_state *state, 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; - if (drm_dp_atomic_find_vcpi_slots(state, - params[i].port->mgr, - params[i].port, - vars[i + k].pbn, - dm_mst_get_pbn_divider(dc_link)) < 0) + if (drm_dp_atomic_find_time_slots(state, params[i].port->mgr, + params[i].port, vars[i + k].pbn) < 0) return false; } 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; - if (drm_dp_atomic_find_vcpi_slots(state, - params[i].port->mgr, - params[i].port, - vars[i + k].pbn, - dm_mst_get_pbn_divider(dc_link)) < 0) + if (drm_dp_atomic_find_time_slots(state, params[i].port->mgr, + params[i].port, vars[i + k].pbn) < 0) return false; } } @@ -874,9 +978,11 @@ static bool compute_mst_dsc_configs_for_link(struct drm_atomic_state *state, return false; /* Optimize degree of compression */ - increase_dsc_bpp(state, dc_link, params, vars, count, k); + if (!increase_dsc_bpp(state, mst_state, dc_link, params, vars, count, k)) + return false; - try_disable_dsc(state, dc_link, params, vars, count, k); + if (!try_disable_dsc(state, dc_link, params, vars, count, k)) + return false; set_dsc_configs_from_fairness_vars(params, vars, count, k); @@ -888,22 +994,31 @@ static bool is_dsc_need_re_compute( struct dc_state *dc_state, struct dc_link *dc_link) { - int i; + 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 mst branch */ + /* 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 amdgpu_dm_connector *aconnector; - struct dc_stream_state *stream; struct drm_crtc_state *new_crtc_state; struct drm_connector_state *new_conn_state; stream = dc_state->streams[i]; - if (!stream) continue; @@ -915,8 +1030,10 @@ static bool is_dsc_need_re_compute( if (!aconnector) continue; - new_conn_state = drm_atomic_get_new_connector_state(state, &aconnector->base); + 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; @@ -927,7 +1044,6 @@ static bool is_dsc_need_re_compute( continue; new_crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); - if (!new_crtc_state) continue; @@ -937,7 +1053,34 @@ static bool is_dsc_need_re_compute( 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) - is_dsc_need_re_compute = true; + 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; } } @@ -981,8 +1124,9 @@ bool compute_mst_dsc_configs_for_state(struct drm_atomic_state *state, continue; mutex_lock(&aconnector->mst_mgr.lock); - if (!compute_mst_dsc_configs_for_link(state, dc_state, stream->link, - vars, &link_vars_start_index)) { + if (!compute_mst_dsc_configs_for_link(state, dc_state, stream->link, vars, + &aconnector->mst_mgr, + &link_vars_start_index)) { mutex_unlock(&aconnector->mst_mgr.lock); return false; } @@ -1005,4 +1149,313 @@ bool compute_mst_dsc_configs_for_state(struct drm_atomic_state *state, return true; } +static bool + 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; + int link_vars_start_index = 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) + 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; + + mutex_lock(&aconnector->mst_mgr.lock); + if (!compute_mst_dsc_configs_for_link(state, dc_state, stream->link, vars, + &aconnector->mst_mgr, + &link_vars_start_index)) { + mutex_unlock(&aconnector->mst_mgr.lock); + return false; + } + mutex_unlock(&aconnector->mst_mgr.lock); + + for (j = 0; j < dc_state->stream_count; j++) { + if (dc_state->streams[j]->link == stream->link) + computed_streams[j] = true; + } + } + + return true; +} + +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; +} + +bool 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 true; + } + if (dm_atomic_get_state(state, dm_state_ptr)) { + DRM_INFO_ONCE("dm_atomic_get_state() failed\n"); + return false; + } + 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 false; + + 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; + + if (!pre_compute_mst_dsc_configs_for_state(state, local_dc_state, vars)) { + DRM_INFO_ONCE("pre_compute_mst_dsc_configs_for_state() failed\n"); + ret = -EINVAL; + 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 == 0); +} + +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}; + + /* + * 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) { + mutex_lock(&aconnector->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(&aconnector->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; +} |