1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
* Copyright 2015 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_DP_H__
#define __DC_LINK_DP_H__
#define LINK_TRAINING_ATTEMPTS 4
#define LINK_TRAINING_RETRY_DELAY 50 /* ms */
#define LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD 3200 /*us*/
#define LINK_AUX_DEFAULT_TIMEOUT_PERIOD 552 /*us*/
#define DP_REPEATER_CONFIGURATION_AND_STATUS_SIZE 0x50
#define TRAINING_AUX_RD_INTERVAL 100 //us
struct dc_link;
struct dc_stream_state;
struct dc_link_settings;
enum {
LINK_TRAINING_MAX_RETRY_COUNT = 5,
/* to avoid infinite loop where-in the receiver
* switches between different VS
*/
LINK_TRAINING_MAX_CR_RETRY = 100,
/*
* Some receivers fail to train on first try and are good
* on subsequent tries. 2 retries should be plenty. If we
* don't have a successful training then we don't expect to
* ever get one.
*/
LINK_TRAINING_MAX_VERIFY_RETRY = 2,
PEAK_FACTOR_X1000 = 1006,
};
bool dp_verify_link_cap(
struct dc_link *link,
struct dc_link_settings *known_limit_link_setting,
int *fail_count);
bool dp_verify_link_cap_with_retries(
struct dc_link *link,
struct dc_link_settings *known_limit_link_setting,
int attempts);
bool dp_verify_mst_link_cap(
struct dc_link *link);
bool dp_validate_mode_timing(
struct dc_link *link,
const struct dc_crtc_timing *timing);
bool decide_edp_link_settings(struct dc_link *link,
struct dc_link_settings *link_setting,
uint32_t req_bw);
void decide_link_settings(
struct dc_stream_state *stream,
struct dc_link_settings *link_setting);
bool perform_link_training_with_retries(
const struct dc_link_settings *link_setting,
bool skip_video_pattern,
int attempts,
struct pipe_ctx *pipe_ctx,
enum signal_type signal,
bool do_fallback);
bool hpd_rx_irq_check_link_loss_status(
struct dc_link *link,
union hpd_irq_data *hpd_irq_dpcd_data);
bool is_mst_supported(struct dc_link *link);
bool detect_dp_sink_caps(struct dc_link *link);
void detect_edp_sink_caps(struct dc_link *link);
bool is_dp_active_dongle(const struct dc_link *link);
bool is_dp_branch_device(const struct dc_link *link);
bool is_edp_ilr_optimization_required(struct dc_link *link, struct dc_crtc_timing *crtc_timing);
void dp_enable_mst_on_sink(struct dc_link *link, bool enable);
enum dp_panel_mode dp_get_panel_mode(struct dc_link *link);
void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode);
bool dp_overwrite_extended_receiver_cap(struct dc_link *link);
void dpcd_set_source_specific_data(struct dc_link *link);
/* Write DPCD link configuration data. */
enum dc_status dpcd_set_link_settings(
struct dc_link *link,
const struct link_training_settings *lt_settings);
/* Write DPCD drive settings. */
enum dc_status dpcd_set_lane_settings(
struct dc_link *link,
const struct link_training_settings *link_training_setting,
uint32_t offset);
/* Read training status and adjustment requests from DPCD. */
enum dc_status dp_get_lane_status_and_drive_settings(
struct dc_link *link,
const struct link_training_settings *link_training_setting,
union lane_status *ln_status,
union lane_align_status_updated *ln_status_updated,
struct link_training_settings *req_settings,
uint32_t offset);
void dp_wait_for_training_aux_rd_interval(
struct dc_link *link,
uint32_t wait_in_micro_secs);
bool dp_is_cr_done(enum dc_lane_count ln_count,
union lane_status *dpcd_lane_status);
enum link_training_result dp_get_cr_failure(enum dc_lane_count ln_count,
union lane_status *dpcd_lane_status);
bool dp_is_ch_eq_done(enum dc_lane_count ln_count,
union lane_status *dpcd_lane_status);
bool dp_is_symbol_locked(enum dc_lane_count ln_count,
union lane_status *dpcd_lane_status);
bool dp_is_interlane_aligned(union lane_align_status_updated align_status);
bool dp_is_max_vs_reached(
const struct link_training_settings *lt_settings);
void dp_update_drive_settings(
struct link_training_settings *dest,
struct link_training_settings src);
uint32_t dp_translate_training_aux_read_interval(uint32_t dpcd_aux_read_interval);
enum dpcd_training_patterns
dc_dp_training_pattern_to_dpcd_training_pattern(
struct dc_link *link,
enum dc_dp_training_pattern pattern);
uint8_t dc_dp_initialize_scrambling_data_symbols(
struct dc_link *link,
enum dc_dp_training_pattern pattern);
enum dc_status dp_set_fec_ready(struct dc_link *link, bool ready);
void dp_set_fec_enable(struct dc_link *link, bool enable);
bool dp_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable);
bool dp_set_dsc_pps_sdp(struct pipe_ctx *pipe_ctx, bool enable);
void dp_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable);
bool dp_update_dsc_config(struct pipe_ctx *pipe_ctx);
bool dp_set_dsc_on_rx(struct pipe_ctx *pipe_ctx, bool enable);
/* Initialize output parameter lt_settings. */
void dp_decide_training_settings(
struct dc_link *link,
const struct dc_link_settings *link_setting,
const struct dc_link_training_overrides *overrides,
struct link_training_settings *lt_settings);
/* Convert PHY repeater count read from DPCD uint8_t. */
uint8_t dp_convert_to_count(uint8_t lttpr_repeater_count);
/* Check DPCD training status registers to detect link loss. */
enum link_training_result dp_check_link_loss_status(
struct dc_link *link,
const struct link_training_settings *link_training_setting);
enum dc_status dpcd_configure_lttpr_mode(
struct dc_link *link,
struct link_training_settings *lt_settings);
enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings);
bool dp_retrieve_lttpr_cap(struct dc_link *link);
#endif /* __DC_LINK_DP_H__ */
|
