tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 bool link_active;
34 struct dpcd_caps *dpcd_caps;
35};
36
37/* DP MST stream allocation (payload bandwidth number) */
38struct link_mst_stream_allocation {
39 /* DIG front */
40 const struct stream_encoder *stream_enc;
41 /* associate DRM payload table with DC stream encoder */
42 uint8_t vcp_id;
43 /* number of slots required for the DP stream in transport packet */
44 uint8_t slot_count;
45};
46
47/* DP MST stream allocation table */
48struct link_mst_stream_allocation_table {
49 /* number of DP video streams */
50 int stream_count;
51 /* array of stream allocations */
52 struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM];
53};
54
55struct time_stamp {
56 uint64_t edp_poweroff;
57 uint64_t edp_poweron;
58};
59
60struct link_trace {
61 struct time_stamp time_stamp;
62};
63/*
64 * A link contains one or more sinks and their connected status.
65 * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
66 */
67struct dc_link {
68 struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
69 unsigned int sink_count;
70 struct dc_sink *local_sink;
71 unsigned int link_index;
72 enum dc_connection_type type;
73 enum signal_type connector_signal;
74 enum dc_irq_source irq_source_hpd;
75 enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
76 bool is_hpd_filter_disabled;
77 bool dp_ss_off;
78
79 /* caps is the same as reported_link_cap. link_traing use
80 * reported_link_cap. Will clean up. TODO
81 */
82 struct dc_link_settings reported_link_cap;
83 struct dc_link_settings verified_link_cap;
84 struct dc_link_settings cur_link_settings;
85 struct dc_lane_settings cur_lane_setting;
86 struct dc_link_settings preferred_link_setting;
87
88 uint8_t ddc_hw_inst;
89
90 uint8_t hpd_src;
91
92 uint8_t link_enc_hw_inst;
93
94 bool test_pattern_enabled;
95 union compliance_test_state compliance_test_state;
96
97 void *priv;
98
99 struct ddc_service *ddc;
100
101 bool aux_mode;
102
103 /* Private to DC core */
104
105 const struct dc *dc;
106
107 struct dc_context *ctx;
108
109 struct link_encoder *link_enc;
110 struct graphics_object_id link_id;
111 union ddi_channel_mapping ddi_channel_mapping;
112 struct connector_device_tag_info device_tag;
113 struct dpcd_caps dpcd_caps;
114 uint32_t dongle_max_pix_clk;
115 unsigned short chip_caps;
116 unsigned int dpcd_sink_count;
117 enum edp_revision edp_revision;
118 bool psr_enabled;
119
120 /* MST record stream using this link */
121 struct link_flags {
122 bool dp_keep_receiver_powered;
123 bool dp_skip_DID2;
124 } wa_flags;
125 struct link_mst_stream_allocation_table mst_stream_alloc_table;
126
127 struct dc_link_status link_status;
128
129 struct link_trace link_trace;
130 struct gpio *hpd_gpio;
131};
132
133const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
134
135/**
136 * dc_get_link_at_index() - Return an enumerated dc_link.
137 *
138 * dc_link order is constant and determined at
139 * boot time. They cannot be created or destroyed.
140 * Use dc_get_caps() to get number of links.
141 */
142static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
143{
144 return dc->links[link_index];
145}
146
147/* Set backlight level of an embedded panel (eDP, LVDS).
148 * backlight_pwm_u16_16 is unsigned 32 bit with 16 bit integer
149 * and 16 bit fractional, where 1.0 is max backlight value.
150 */
151bool dc_link_set_backlight_level(const struct dc_link *dc_link,
152 uint32_t backlight_pwm_u16_16,
153 uint32_t frame_ramp);
154
155int dc_link_get_backlight_level(const struct dc_link *dc_link);
156
157bool dc_link_set_abm_disable(const struct dc_link *dc_link);
158
159bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable, bool wait);
160
161bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_state);
162
163bool dc_link_setup_psr(struct dc_link *dc_link,
164 const struct dc_stream_state *stream, struct psr_config *psr_config,
165 struct psr_context *psr_context);
166
167/* Request DC to detect if there is a Panel connected.
168 * boot - If this call is during initial boot.
169 * Return false for any type of detection failure or MST detection
170 * true otherwise. True meaning further action is required (status update
171 * and OS notification).
172 */
173enum dc_detect_reason {
174 DETECT_REASON_BOOT,
175 DETECT_REASON_HPD,
176 DETECT_REASON_HPDRX,
177};
178
179bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
180bool dc_link_get_hpd_state(struct dc_link *dc_link);
181
182/* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
183 * Return:
184 * true - Downstream port status changed. DM should call DC to do the
185 * detection.
186 * false - no change in Downstream port status. No further action required
187 * from DM. */
188bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link,
189 union hpd_irq_data *hpd_irq_dpcd_data, bool *out_link_loss);
190
191struct dc_sink_init_data;
192
193struct dc_sink *dc_link_add_remote_sink(
194 struct dc_link *dc_link,
195 const uint8_t *edid,
196 int len,
197 struct dc_sink_init_data *init_data);
198
199void dc_link_remove_remote_sink(
200 struct dc_link *link,
201 struct dc_sink *sink);
202
203/* Used by diagnostics for virtual link at the moment */
204
205void dc_link_dp_set_drive_settings(
206 struct dc_link *link,
207 struct link_training_settings *lt_settings);
208
209enum link_training_result dc_link_dp_perform_link_training(
210 struct dc_link *link,
211 const struct dc_link_settings *link_setting,
212 bool skip_video_pattern);
213
214void dc_link_dp_enable_hpd(const struct dc_link *link);
215
216void dc_link_dp_disable_hpd(const struct dc_link *link);
217
218bool dc_link_dp_set_test_pattern(
219 struct dc_link *link,
220 enum dp_test_pattern test_pattern,
221 const struct link_training_settings *p_link_settings,
222 const unsigned char *p_custom_pattern,
223 unsigned int cust_pattern_size);
224
225void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
226
227bool dc_link_is_dp_sink_present(struct dc_link *link);
228
229bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type);
230/*
231 * DPCD access interfaces
232 */
233
234void dc_link_set_drive_settings(struct dc *dc,
235 struct link_training_settings *lt_settings,
236 const struct dc_link *link);
237void dc_link_perform_link_training(struct dc *dc,
238 struct dc_link_settings *link_setting,
239 bool skip_video_pattern);
240void dc_link_set_preferred_link_settings(struct dc *dc,
241 struct dc_link_settings *link_setting,
242 struct dc_link *link);
243void dc_link_enable_hpd(const struct dc_link *link);
244void dc_link_disable_hpd(const struct dc_link *link);
245void dc_link_set_test_pattern(struct dc_link *link,
246 enum dp_test_pattern test_pattern,
247 const struct link_training_settings *p_link_settings,
248 const unsigned char *p_custom_pattern,
249 unsigned int cust_pattern_size);
250uint32_t dc_link_bandwidth_kbps(
251 const struct dc_link *link,
252 const struct dc_link_settings *link_setting);
253
254const struct dc_link_settings *dc_link_get_link_cap(
255 const struct dc_link *link);
256
257bool dc_submit_i2c(
258 struct dc *dc,
259 uint32_t link_index,
260 struct i2c_command *cmd);
261
262uint32_t dc_bandwidth_in_kbps_from_timing(
263 const struct dc_crtc_timing *timing);
264#endif /* DC_LINK_H_ */