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1/*2 * Copyright 2022 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: AMD23 *24 */25 26 27#ifndef __DC_LINK_HPD_H__28#define __DC_LINK_HPD_H__29#include "link.h"30 31enum hpd_source_id get_hpd_line(struct dc_link *link);32/*33 * Function: program_hpd_filter34 *35 * @brief36 * Programs HPD filter on associated HPD line to default values.37 *38 * @return39 * true on success, false otherwise40 */41bool program_hpd_filter(const struct dc_link *link);42/* Query hot plug status of USB4 DP tunnel.43 * Returns true if HPD high.44 */45bool dpia_query_hpd_status(struct dc_link *link);46bool query_hpd_status(struct dc_link *link, uint32_t *is_hpd_high);47bool link_get_hpd_state(struct dc_link *link);48struct gpio *link_get_hpd_gpio(struct dc_bios *dcb,49 struct graphics_object_id link_id,50 struct gpio_service *gpio_service);51void link_enable_hpd(const struct dc_link *link);52void link_disable_hpd(const struct dc_link *link);53void link_enable_hpd_filter(struct dc_link *link, bool enable);54#endif /* __DC_LINK_HPD_H__ */55