1 | /* |
2 | * Copyright 2022 Advanced Micro Devices, Inc. |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice shall be included in |
12 | * all copies or substantial portions of the Software. |
13 | * |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
20 | * OTHER DEALINGS IN THE SOFTWARE. |
21 | * |
22 | * Authors: AMD |
23 | * |
24 | */ |
25 | |
26 | |
27 | #ifndef __DC_LINK_HPD_H__ |
28 | #define __DC_LINK_HPD_H__ |
29 | #include "link.h" |
30 | |
31 | enum hpd_source_id get_hpd_line(struct dc_link *link); |
32 | /* |
33 | * Function: program_hpd_filter |
34 | * |
35 | * @brief |
36 | * Programs HPD filter on associated HPD line to default values. |
37 | * |
38 | * @return |
39 | * true on success, false otherwise |
40 | */ |
41 | bool program_hpd_filter(const struct dc_link *link); |
42 | /* Query hot plug status of USB4 DP tunnel. |
43 | * Returns true if HPD high. |
44 | */ |
45 | bool dpia_query_hpd_status(struct dc_link *link); |
46 | bool query_hpd_status(struct dc_link *link, uint32_t *is_hpd_high); |
47 | bool link_get_hpd_state(struct dc_link *link); |
48 | struct gpio *link_get_hpd_gpio(struct dc_bios *dcb, |
49 | struct graphics_object_id link_id, |
50 | struct gpio_service *gpio_service); |
51 | void link_enable_hpd(const struct dc_link *link); |
52 | void link_disable_hpd(const struct dc_link *link); |
53 | void link_enable_hpd_filter(struct dc_link *link, bool enable); |
54 | #endif /* __DC_LINK_HPD_H__ */ |
55 | |