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 | data: dpcd_dp_tun_data, |
60 | size: sizeof(dpcd_dp_tun_data)); |
61 | |
62 | status = core_link_read_dpcd( |
63 | link, |
64 | DP_USB4_ROUTER_TOPOLOGY_ID, |
65 | data: dpcd_topology_data, |
66 | size: 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 | |
86 | /* prepare QUERY_HPD command */ |
87 | cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE; |
88 | cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1; |
89 | cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA; |
90 | |
91 | /* Query dpia hpd status from dmub */ |
92 | if (dc_wake_and_execute_dmub_cmd(ctx: dmub_srv->ctx, cmd: &cmd, |
93 | wait_type: DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY) && |
94 | cmd.query_hpd.data.status == AUX_RET_SUCCESS) { |
95 | DC_LOG_DEBUG("%s: for link(%d) dpia(%d) success, current_hpd_status(%d) new_hpd_status(%d)\n" , |
96 | __func__, |
97 | link->link_index, |
98 | link->link_id.enum_id - ENUM_ID_1, |
99 | link->hpd_status, |
100 | cmd.query_hpd.data.result); |
101 | link->hpd_status = cmd.query_hpd.data.result; |
102 | } else { |
103 | DC_LOG_ERROR("%s: for link(%d) dpia(%d) failed with status(%d), current_hpd_status(%d) new_hpd_status(0)\n" , |
104 | __func__, |
105 | link->link_index, |
106 | link->link_id.enum_id - ENUM_ID_1, |
107 | cmd.query_hpd.data.status, |
108 | link->hpd_status); |
109 | link->hpd_status = false; |
110 | } |
111 | |
112 | return link->hpd_status; |
113 | } |
114 | |
115 | |