| /* |
| * Copyright 2022 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: AMD |
| * |
| */ |
| |
| |
| #ifndef __DC_LINK_HPD_H__ |
| #define __DC_LINK_HPD_H__ |
| #include "link.h" |
| |
| enum hpd_source_id get_hpd_line(struct dc_link *link); |
| /* |
| * Function: program_hpd_filter |
| * |
| * @brief |
| * Programs HPD filter on associated HPD line to default values. |
| * |
| * @return |
| * true on success, false otherwise |
| */ |
| bool program_hpd_filter(const struct dc_link *link); |
| /* Query hot plug status of USB4 DP tunnel. |
| * Returns true if HPD high. |
| */ |
| bool dpia_query_hpd_status(struct dc_link *link); |
| bool query_hpd_status(struct dc_link *link, uint32_t *is_hpd_high); |
| bool link_get_hpd_state(struct dc_link *link); |
| struct gpio *link_get_hpd_gpio(struct dc_bios *dcb, |
| struct graphics_object_id link_id, |
| struct gpio_service *gpio_service); |
| void link_enable_hpd(const struct dc_link *link); |
| void link_disable_hpd(const struct dc_link *link); |
| void link_enable_hpd_filter(struct dc_link *link, bool enable); |
| #endif /* __DC_LINK_HPD_H__ */ |
