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 "dc_link.h" 30 #include "dc_link_dp.h" 31 #include "dpcd_defs.h" 32 33 #include "link_dp_dpia.h" 34 #include "link_hwss.h" 35 #include "dm_helpers.h" 36 #include "dmub/inc/dmub_cmd.h" 37 #include "link_dpcd.h" 38 #include "link_dp_training.h" 39 #include "dc_dmub_srv.h" 40 41 #define DC_LOGGER \ 42 link->ctx->logger 43 44 /** @note Can remove once DP tunneling registers in upstream include/drm/drm_dp_helper.h */ 45 /* DPCD DP Tunneling over USB4 */ 46 #define DP_TUNNELING_CAPABILITIES_SUPPORT 0xe000d 47 #define DP_IN_ADAPTER_INFO 0xe000e 48 #define DP_USB4_DRIVER_ID 0xe000f 49 #define DP_USB4_ROUTER_TOPOLOGY_ID 0xe001b 50 51 enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link) 52 { 53 enum dc_status status = DC_OK; 54 uint8_t dpcd_dp_tun_data[3] = {0}; 55 uint8_t dpcd_topology_data[DPCD_USB4_TOPOLOGY_ID_LEN] = {0}; 56 uint8_t i = 0; 57 58 status = core_link_read_dpcd( 59 link, 60 DP_TUNNELING_CAPABILITIES_SUPPORT, 61 dpcd_dp_tun_data, 62 sizeof(dpcd_dp_tun_data)); 63 64 status = core_link_read_dpcd( 65 link, 66 DP_USB4_ROUTER_TOPOLOGY_ID, 67 dpcd_topology_data, 68 sizeof(dpcd_topology_data)); 69 70 link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw = 71 dpcd_dp_tun_data[DP_TUNNELING_CAPABILITIES_SUPPORT - DP_TUNNELING_CAPABILITIES_SUPPORT]; 72 link->dpcd_caps.usb4_dp_tun_info.dpia_info.raw = 73 dpcd_dp_tun_data[DP_IN_ADAPTER_INFO - DP_TUNNELING_CAPABILITIES_SUPPORT]; 74 link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id = 75 dpcd_dp_tun_data[DP_USB4_DRIVER_ID - DP_TUNNELING_CAPABILITIES_SUPPORT]; 76 77 for (i = 0; i < DPCD_USB4_TOPOLOGY_ID_LEN; i++) 78 link->dpcd_caps.usb4_dp_tun_info.usb4_topology_id[i] = dpcd_topology_data[i]; 79 80 return status; 81 } 82 83 bool dc_link_dpia_query_hpd_status(struct dc_link *link) 84 { 85 union dmub_rb_cmd cmd = {0}; 86 struct dc_dmub_srv *dmub_srv = link->ctx->dmub_srv; 87 bool is_hpd_high = false; 88 89 /* prepare QUERY_HPD command */ 90 cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE; 91 cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1; 92 cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA; 93 94 /* Return HPD status reported by DMUB if query successfully executed. */ 95 if (dc_dmub_srv_cmd_with_reply_data(dmub_srv, &cmd) && cmd.query_hpd.data.status == AUX_RET_SUCCESS) 96 is_hpd_high = cmd.query_hpd.data.result; 97 98 DC_LOG_DEBUG("%s: link(%d) dpia(%d) cmd_status(%d) result(%d)\n", 99 __func__, 100 link->link_index, 101 link->link_id.enum_id - ENUM_ID_1, 102 cmd.query_hpd.data.status, 103 cmd.query_hpd.data.result); 104 105 return is_hpd_high; 106 } 107 108