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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/*
2 * Copyright 2012-14 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#ifndef DC_LINK_H_
27#define DC_LINK_H_
28
29#include "dc_types.h"
30#include "grph_object_defs.h"
31
32struct dc_link_status {
33 struct dpcd_caps *dpcd_caps;
34};
35
36/* DP MST stream allocation (payload bandwidth number) */
37struct link_mst_stream_allocation {
38 /* DIG front */
39 const struct stream_encoder *stream_enc;
40 /* associate DRM payload table with DC stream encoder */
41 uint8_t vcp_id;
42 /* number of slots required for the DP stream in transport packet */
43 uint8_t slot_count;
44};
45
46/* DP MST stream allocation table */
47struct link_mst_stream_allocation_table {
48 /* number of DP video streams */
49 int stream_count;
50 /* array of stream allocations */
51 struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM];
52};
53
54struct time_stamp {
55 uint64_t edp_poweroff;
56 uint64_t edp_poweron;
57};
58
59struct link_trace {
60 struct time_stamp time_stamp;
61};
62/*
63 * A link contains one or more sinks and their connected status.
64 * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
65 */
66struct dc_link {
67 struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
68 unsigned int sink_count;
69 struct dc_sink *local_sink;
70 unsigned int link_index;
71 enum dc_connection_type type;
72 enum signal_type connector_signal;
73 enum dc_irq_source irq_source_hpd;
74 enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
75 bool is_hpd_filter_disabled;
76
77 /* caps is the same as reported_link_cap. link_traing use
78 * reported_link_cap. Will clean up. TODO
79 */
80 struct dc_link_settings reported_link_cap;
81 struct dc_link_settings verified_link_cap;
82 struct dc_link_settings cur_link_settings;
83 struct dc_lane_settings cur_lane_setting;
84 struct dc_link_settings preferred_link_setting;
85
86 uint8_t ddc_hw_inst;
87
88 uint8_t hpd_src;
89
90 uint8_t link_enc_hw_inst;
91
92 bool test_pattern_enabled;
93 union compliance_test_state compliance_test_state;
94
95 void *priv;
96
97 struct ddc_service *ddc;
98
99 bool aux_mode;
100
101 /* Private to DC core */
102
103 const struct dc *dc;
104
105 struct dc_context *ctx;
106
107 struct link_encoder *link_enc;
108 struct graphics_object_id link_id;
109 union ddi_channel_mapping ddi_channel_mapping;
110 struct connector_device_tag_info device_tag;
111 struct dpcd_caps dpcd_caps;
112 unsigned short chip_caps;
113 unsigned int dpcd_sink_count;
114 enum edp_revision edp_revision;
115 bool psr_enabled;
116
117 /* MST record stream using this link */
118 struct link_flags {
119 bool dp_keep_receiver_powered;
120 } wa_flags;
121 struct link_mst_stream_allocation_table mst_stream_alloc_table;
122
123 struct dc_link_status link_status;
124
125 struct link_trace link_trace;
126};
127
128const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
129
130/*
131 * Return an enumerated dc_link. dc_link order is constant and determined at
132 * boot time. They cannot be created or destroyed.
133 * Use dc_get_caps() to get number of links.
134 */
135static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
136{
137 return dc->links[link_index];
138}
139
140/* Set backlight level of an embedded panel (eDP, LVDS). */
141bool dc_link_set_backlight_level(const struct dc_link *dc_link, uint32_t level,
142 uint32_t frame_ramp, const struct dc_stream_state *stream);
143
144bool dc_link_set_abm_disable(const struct dc_link *dc_link);
145
146bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable, bool wait);
147
148bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_state);
149
150bool dc_link_setup_psr(struct dc_link *dc_link,
151 const struct dc_stream_state *stream, struct psr_config *psr_config,
152 struct psr_context *psr_context);
153
154/* Request DC to detect if there is a Panel connected.
155 * boot - If this call is during initial boot.
156 * Return false for any type of detection failure or MST detection
157 * true otherwise. True meaning further action is required (status update
158 * and OS notification).
159 */
160enum dc_detect_reason {
161 DETECT_REASON_BOOT,
162 DETECT_REASON_HPD,
163 DETECT_REASON_HPDRX,
164};
165
166bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
167
168/* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
169 * Return:
170 * true - Downstream port status changed. DM should call DC to do the
171 * detection.
172 * false - no change in Downstream port status. No further action required
173 * from DM. */
174bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link,
175 union hpd_irq_data *hpd_irq_dpcd_data);
176
177struct dc_sink_init_data;
178
179struct dc_sink *dc_link_add_remote_sink(
180 struct dc_link *dc_link,
181 const uint8_t *edid,
182 int len,
183 struct dc_sink_init_data *init_data);
184
185void dc_link_remove_remote_sink(
186 struct dc_link *link,
187 struct dc_sink *sink);
188
189/* Used by diagnostics for virtual link at the moment */
190
191void dc_link_dp_set_drive_settings(
192 struct dc_link *link,
193 struct link_training_settings *lt_settings);
194
195enum link_training_result dc_link_dp_perform_link_training(
196 struct dc_link *link,
197 const struct dc_link_settings *link_setting,
198 bool skip_video_pattern);
199
200void dc_link_dp_enable_hpd(const struct dc_link *link);
201
202void dc_link_dp_disable_hpd(const struct dc_link *link);
203
204bool dc_link_dp_set_test_pattern(
205 struct dc_link *link,
206 enum dp_test_pattern test_pattern,
207 const struct link_training_settings *p_link_settings,
208 const unsigned char *p_custom_pattern,
209 unsigned int cust_pattern_size);
210
211void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
212
213/*
214 * DPCD access interfaces
215 */
216
217bool dc_submit_i2c(
218 struct dc *dc,
219 uint32_t link_index,
220 struct i2c_command *cmd);
221
222#endif /* DC_LINK_H_ */