diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 33 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/dispnv50/disp.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_dp_mst.c | 7 | ||||
| -rw-r--r-- | include/drm/drm_dp_mst_helper.h | 12 |
8 files changed, 71 insertions, 15 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 997567f6f0ba..ef8d53e24c47 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 @@ -429,6 +429,8 @@ 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); @@ -443,6 +445,7 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, 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, @@ -450,6 +453,8 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm, &aconnector->dm_dp_aux.aux, 16, 4, + (u8)max_link_enc_cap.lane_count, + (u8)max_link_enc_cap.link_rate, aconnector->connector_id); drm_connector_attach_dp_subconnector_property(&aconnector->base); diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 7d2e433c2275..6fe66b7ee53e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1894,6 +1894,24 @@ bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down) return true; } +bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap) +{ + if (!max_link_enc_cap) { + DC_LOG_ERROR("%s: Could not return max link encoder caps", __func__); + return false; + } + + if (link->link_enc->funcs->get_max_link_cap) { + link->link_enc->funcs->get_max_link_cap(link->link_enc, max_link_enc_cap); + return true; + } + + DC_LOG_ERROR("%s: Max link encoder caps unknown", __func__); + max_link_enc_cap->lane_count = 1; + max_link_enc_cap->link_rate = 6; + return false; +} + static struct dc_link_settings get_max_link_cap(struct dc_link *link) { struct dc_link_settings max_link_cap = {0}; diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index b0013e674864..cb6d0543d839 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -346,6 +346,8 @@ bool dc_link_dp_set_test_pattern( const unsigned char *p_custom_pattern, unsigned int cust_pattern_size); +bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap); + void dc_link_enable_hpd_filter(struct dc_link *link, bool enable); bool dc_link_is_dp_sink_present(struct dc_link *link); diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 5539a91b4031..54604633e65c 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -3708,19 +3708,24 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms /* set the device into MST mode */ if (mst_state) { struct drm_dp_payload reset_pay; + int lane_count; + int link_rate; WARN_ON(mgr->mst_primary); /* get dpcd info */ - ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, DP_RECEIVER_CAP_SIZE); - if (ret != DP_RECEIVER_CAP_SIZE) { - drm_dbg_kms(mgr->dev, "failed to read DPCD\n"); + ret = drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd); + if (ret < 0) { + drm_dbg_kms(mgr->dev, "%s: failed to read DPCD, ret %d\n", + mgr->aux->name, ret); goto out_unlock; } + lane_count = min_t(int, mgr->dpcd[2] & DP_MAX_LANE_COUNT_MASK, mgr->max_lane_count); + link_rate = min_t(int, mgr->dpcd[1], mgr->max_link_rate); mgr->pbn_div = drm_dp_get_vc_payload_bw(mgr, - drm_dp_bw_code_to_link_rate(mgr->dpcd[1]), - mgr->dpcd[2] & DP_MAX_LANE_COUNT_MASK); + drm_dp_bw_code_to_link_rate(link_rate), + lane_count); if (mgr->pbn_div == 0) { ret = -EINVAL; goto out_unlock; @@ -5448,14 +5453,17 @@ EXPORT_SYMBOL(drm_atomic_get_mst_topology_state); * @aux: DP helper aux channel to talk to this device * @max_dpcd_transaction_bytes: hw specific DPCD transaction limit * @max_payloads: maximum number of payloads this GPU can source + * @max_lane_count: maximum number of lanes this GPU supports + * @max_link_rate: maximum link rate this GPU supports, units as in DPCD * @conn_base_id: the connector object ID the MST device is connected to. * * Return 0 for success, or negative error code on failure */ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, struct drm_device *dev, struct drm_dp_aux *aux, - int max_dpcd_transaction_bytes, - int max_payloads, int conn_base_id) + int max_dpcd_transaction_bytes, int max_payloads, + u8 max_lane_count, u8 max_link_rate, + int conn_base_id) { struct drm_dp_mst_topology_state *mst_state; @@ -5490,6 +5498,8 @@ int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, mgr->aux = aux; mgr->max_dpcd_transaction_bytes = max_dpcd_transaction_bytes; mgr->max_payloads = max_payloads; + mgr->max_lane_count = max_lane_count; + mgr->max_link_rate = max_link_rate; mgr->conn_base_id = conn_base_id; if (max_payloads + 1 > sizeof(mgr->payload_mask) * 8 || max_payloads + 1 > sizeof(mgr->vcpi_mask) * 8) @@ -5896,14 +5906,13 @@ struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port) if (drm_dp_has_quirk(&desc, DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD) && port->mgr->dpcd[DP_DPCD_REV] >= DP_DPCD_REV_14 && port->parent == port->mgr->mst_primary) { - u8 downstreamport; + u8 dpcd_ext[DP_RECEIVER_CAP_SIZE]; - if (drm_dp_dpcd_read(&port->aux, DP_DOWNSTREAMPORT_PRESENT, - &downstreamport, 1) < 0) + if (drm_dp_read_dpcd_caps(port->mgr->aux, dpcd_ext) < 0) return NULL; - if ((downstreamport & DP_DWN_STRM_PORT_PRESENT) && - ((downstreamport & DP_DWN_STRM_PORT_TYPE_MASK) + if ((dpcd_ext[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT) && + ((dpcd_ext[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_TYPE_MASK) != DP_DWN_STRM_PORT_TYPE_ANALOG)) return port->mgr->aux; } diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 860381d68d9d..bf7f8487945c 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -942,6 +942,7 @@ intel_dp_mst_encoder_init(struct intel_digital_port *dig_port, int conn_base_id) struct intel_dp *intel_dp = &dig_port->dp; enum port port = dig_port->base.port; int ret; + int bios_max_link_rate; if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp)) return 0; @@ -956,8 +957,11 @@ intel_dp_mst_encoder_init(struct intel_digital_port *dig_port, int conn_base_id) /* create encoders */ intel_dp_create_fake_mst_encoders(dig_port); + bios_max_link_rate = intel_bios_dp_max_link_rate(&dig_port->base); ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm, - &intel_dp->aux, 16, 3, conn_base_id); + &intel_dp->aux, 16, 3, + (u8)dig_port->max_lanes, + (u8)(bios_max_link_rate / 27000), conn_base_id); if (ret) return ret; diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index 1c9c0cdf85db..c46d0374b6e6 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -1617,7 +1617,8 @@ nv50_mstm_new(struct nouveau_encoder *outp, struct drm_dp_aux *aux, int aux_max, mstm->mgr.cbs = &nv50_mstm; ret = drm_dp_mst_topology_mgr_init(&mstm->mgr, dev, aux, aux_max, - max_payloads, conn_base_id); + (u8)max_payloads, outp->dcb->dpconf.link_nr, + (u8)outp->dcb->dpconf.link_bw, conn_base_id); if (ret) return ret; diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c index 59cf1d288465..13072c2a6502 100644 --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c @@ -629,13 +629,20 @@ int radeon_dp_mst_init(struct radeon_connector *radeon_connector) { struct drm_device *dev = radeon_connector->base.dev; + int max_link_rate; if (!radeon_connector->ddc_bus->has_aux) return 0; + if (radeon_connector_is_dp12_capable(&radeon_connector->base)) + max_link_rate = 0x14; + else + max_link_rate = 0x0a; + radeon_connector->mst_mgr.cbs = &mst_cbs; return drm_dp_mst_topology_mgr_init(&radeon_connector->mst_mgr, dev, &radeon_connector->ddc_bus->aux, 16, 6, + 4, (u8)max_link_rate, radeon_connector->base.base.id); } diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h index 20dc705642bd..c87a829b6498 100644 --- a/include/drm/drm_dp_mst_helper.h +++ b/include/drm/drm_dp_mst_helper.h @@ -594,6 +594,14 @@ struct drm_dp_mst_topology_mgr { */ int max_payloads; /** + * @max_lane_count: maximum number of lanes the GPU can drive. + */ + u8 max_lane_count; + /** + * @max_link_rate: maximum link rate per lane GPU can output. + */ + u8 max_link_rate; + /** * @conn_base_id: DRM connector ID this mgr is connected to. Only used * to build the MST connector path value. */ @@ -765,7 +773,9 @@ struct drm_dp_mst_topology_mgr { int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr, struct drm_device *dev, struct drm_dp_aux *aux, int max_dpcd_transaction_bytes, - int max_payloads, int conn_base_id); + int max_payloads, + u8 max_lane_count, u8 max_link_rate, + int conn_base_id); void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); |