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