1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2021 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: AMD 24 * 25 */ 26 27 #include "dc.h" 28 #include "inc/core_status.h" 29 #include "dpcd_defs.h" 30 31 #include "link_dp_dpia.h" 32 #include "link_hwss.h" 33 #include "dm_helpers.h" 34 #include "dmub/inc/dmub_cmd.h" 35 #include "link_dpcd.h" 36 #include "link_dp_training.h" 37 #include "dc_dmub_srv.h" 38 39 #define DC_LOGGER \ 40 link->ctx->logger 41 42 /** @note Can remove once DP tunneling registers in upstream include/drm/drm_dp_helper.h */ 43 /* DPCD DP Tunneling over USB4 */ 44 #define DP_TUNNELING_CAPABILITIES_SUPPORT 0xe000d 45 #define DP_IN_ADAPTER_INFO 0xe000e 46 #define DP_USB4_DRIVER_ID 0xe000f 47 #define DP_USB4_ROUTER_TOPOLOGY_ID 0xe001b 48 49 enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link) 50 { 51 enum dc_status status = DC_OK; 52 uint8_t dpcd_dp_tun_data[3] = {0}; 53 uint8_t dpcd_topology_data[DPCD_USB4_TOPOLOGY_ID_LEN] = {0}; 54 uint8_t i = 0; 55 56 status = core_link_read_dpcd( 57 link, 58 DP_TUNNELING_CAPABILITIES_SUPPORT, 59 dpcd_dp_tun_data, 60 sizeof(dpcd_dp_tun_data)); 61 62 status = core_link_read_dpcd( 63 link, 64 DP_USB4_ROUTER_TOPOLOGY_ID, 65 dpcd_topology_data, 66 sizeof(dpcd_topology_data)); 67 68 link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw = 69 dpcd_dp_tun_data[DP_TUNNELING_CAPABILITIES_SUPPORT - DP_TUNNELING_CAPABILITIES_SUPPORT]; 70 link->dpcd_caps.usb4_dp_tun_info.dpia_info.raw = 71 dpcd_dp_tun_data[DP_IN_ADAPTER_INFO - DP_TUNNELING_CAPABILITIES_SUPPORT]; 72 link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id = 73 dpcd_dp_tun_data[DP_USB4_DRIVER_ID - DP_TUNNELING_CAPABILITIES_SUPPORT]; 74 75 for (i = 0; i < DPCD_USB4_TOPOLOGY_ID_LEN; i++) 76 link->dpcd_caps.usb4_dp_tun_info.usb4_topology_id[i] = dpcd_topology_data[i]; 77 78 return status; 79 } 80 81 bool dpia_query_hpd_status(struct dc_link *link) 82 { 83 union dmub_rb_cmd cmd = {0}; 84 struct dc_dmub_srv *dmub_srv = link->ctx->dmub_srv; 85 bool is_hpd_high = false; 86 87 /* prepare QUERY_HPD command */ 88 cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE; 89 cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1; 90 cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA; 91 92 /* Return HPD status reported by DMUB if query successfully executed. */ 93 if (dc_dmub_srv_cmd_with_reply_data(dmub_srv, &cmd) && cmd.query_hpd.data.status == AUX_RET_SUCCESS) 94 is_hpd_high = cmd.query_hpd.data.result; 95 96 DC_LOG_DEBUG("%s: link(%d) dpia(%d) cmd_status(%d) result(%d)\n", 97 __func__, 98 link->link_index, 99 link->link_id.enum_id - ENUM_ID_1, 100 cmd.query_hpd.data.status, 101 cmd.query_hpd.data.result); 102 103 return is_hpd_high; 104 } 105 106