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_DP_TRAINING_8B_10B_H__
28#define __DC_LINK_DP_TRAINING_8B_10B_H__
29#include "link_dp_training.h"
30
31/* to avoid infinite loop where-in the receiver
32 * switches between different VS
33 */
34#define LINK_TRAINING_MAX_CR_RETRY 100
35#define LINK_TRAINING_MAX_RETRY_COUNT 5
36
37enum link_training_result dp_perform_8b_10b_link_training(
38 struct dc_link *link,
39 const struct link_resource *link_res,
40 struct link_training_settings *lt_settings);
41
42enum link_training_result perform_8b_10b_clock_recovery_sequence(
43 struct dc_link *link,
44 const struct link_resource *link_res,
45 struct link_training_settings *lt_settings,
46 uint32_t offset);
47
48enum link_training_result perform_8b_10b_channel_equalization_sequence(
49 struct dc_link *link,
50 const struct link_resource *link_res,
51 struct link_training_settings *lt_settings,
52 uint32_t offset);
53
54enum lttpr_mode dp_decide_8b_10b_lttpr_mode(struct dc_link *link);
55
56void decide_8b_10b_training_settings(
57 struct dc_link *link,
58 const struct dc_link_settings *link_setting,
59 struct link_training_settings *lt_settings);
60
61#endif /* __DC_LINK_DP_TRAINING_8B_10B_H__ */
62

source code of linux/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.h