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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | // SPDX-License-Identifier: MIT /* * Copyright 2021 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 "dc.h" #include "inc/core_status.h" #include "dpcd_defs.h" #include "link_dp_dpia.h" #include "link_hwss.h" #include "dm_helpers.h" #include "dmub/inc/dmub_cmd.h" #include "link_dpcd.h" #include "link_dp_training.h" #include "dc_dmub_srv.h" #define DC_LOGGER \ link->ctx->logger /** @note Can remove once DP tunneling registers in upstream include/drm/drm_dp_helper.h */ /* DPCD DP Tunneling over USB4 */ #define DP_TUNNELING_CAPABILITIES_SUPPORT 0xe000d #define DP_IN_ADAPTER_INFO 0xe000e #define DP_USB4_DRIVER_ID 0xe000f #define DP_USB4_ROUTER_TOPOLOGY_ID 0xe001b enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link) { enum dc_status status = DC_OK; uint8_t dpcd_dp_tun_data[3] = {0}; uint8_t dpcd_topology_data[DPCD_USB4_TOPOLOGY_ID_LEN] = {0}; uint8_t i = 0; status = core_link_read_dpcd( link, DP_TUNNELING_CAPABILITIES_SUPPORT, dpcd_dp_tun_data, sizeof(dpcd_dp_tun_data)); status = core_link_read_dpcd( link, DP_USB4_ROUTER_TOPOLOGY_ID, dpcd_topology_data, sizeof(dpcd_topology_data)); link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw = dpcd_dp_tun_data[DP_TUNNELING_CAPABILITIES_SUPPORT - DP_TUNNELING_CAPABILITIES_SUPPORT]; link->dpcd_caps.usb4_dp_tun_info.dpia_info.raw = dpcd_dp_tun_data[DP_IN_ADAPTER_INFO - DP_TUNNELING_CAPABILITIES_SUPPORT]; link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id = dpcd_dp_tun_data[DP_USB4_DRIVER_ID - DP_TUNNELING_CAPABILITIES_SUPPORT]; for (i = 0; i < DPCD_USB4_TOPOLOGY_ID_LEN; i++) link->dpcd_caps.usb4_dp_tun_info.usb4_topology_id[i] = dpcd_topology_data[i]; return status; } bool dpia_query_hpd_status(struct dc_link *link) { union dmub_rb_cmd cmd = {0}; struct dc_dmub_srv *dmub_srv = link->ctx->dmub_srv; bool is_hpd_high = false; /* prepare QUERY_HPD command */ cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE; cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1; cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA; /* Return HPD status reported by DMUB if query successfully executed. */ if (dm_execute_dmub_cmd(dmub_srv->ctx, &cmd, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY) && cmd.query_hpd.data.status == AUX_RET_SUCCESS) is_hpd_high = cmd.query_hpd.data.result; DC_LOG_DEBUG("%s: link(%d) dpia(%d) cmd_status(%d) result(%d)\n", __func__, link->link_index, link->link_id.enum_id - ENUM_ID_1, cmd.query_hpd.data.status, cmd.query_hpd.data.result); return is_hpd_high; } |