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26#ifndef DC_LINK_H_
27#define DC_LINK_H_
28
29#include "dc.h"
30#include "dc_types.h"
31#include "grph_object_defs.h"
32
33enum dc_link_fec_state {
34 dc_link_fec_not_ready,
35 dc_link_fec_ready,
36 dc_link_fec_enabled
37};
38
39struct dc_link_status {
40 bool link_active;
41 struct dpcd_caps *dpcd_caps;
42};
43
44
45struct link_mst_stream_allocation {
46
47 const struct stream_encoder *stream_enc;
48#if defined(CONFIG_DRM_AMD_DC_DCN)
49
50 const struct hpo_dp_stream_encoder *hpo_dp_stream_enc;
51#endif
52
53 uint8_t vcp_id;
54
55 uint8_t slot_count;
56};
57
58
59struct link_mst_stream_allocation_table {
60
61 int stream_count;
62
63 struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM];
64};
65
66struct time_stamp {
67 uint64_t edp_poweroff;
68 uint64_t edp_poweron;
69};
70
71struct link_trace {
72 struct time_stamp time_stamp;
73};
74
75
76struct psr_settings {
77 bool psr_feature_enabled;
78 bool psr_allow_active;
79 enum dc_psr_version psr_version;
80
81
82
83
84
85
86 bool psr_frame_capture_indication_req;
87 unsigned int psr_sdp_transmit_line_num_deadline;
88 unsigned int psr_power_opt;
89};
90
91
92
93
94
95struct dc_link {
96 struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
97 unsigned int sink_count;
98 struct dc_sink *local_sink;
99 unsigned int link_index;
100 enum dc_connection_type type;
101 enum signal_type connector_signal;
102 enum dc_irq_source irq_source_hpd;
103 enum dc_irq_source irq_source_hpd_rx;
104 bool is_hpd_filter_disabled;
105 bool dp_ss_off;
106 bool link_state_valid;
107 bool aux_access_disabled;
108 bool sync_lt_in_progress;
109 enum lttpr_mode lttpr_mode;
110 bool is_internal_display;
111
112
113
114 bool is_dig_mapping_flexible;
115 bool hpd_status;
116
117 bool edp_sink_present;
118
119
120
121
122 struct dc_link_settings reported_link_cap;
123 struct dc_link_settings verified_link_cap;
124 struct dc_link_settings cur_link_settings;
125 struct dc_lane_settings cur_lane_setting[LANE_COUNT_DP_MAX];
126 struct dc_link_settings preferred_link_setting;
127
128
129
130
131 struct dc_link_training_overrides preferred_training_settings;
132 struct dp_audio_test_data audio_test_data;
133
134 uint8_t ddc_hw_inst;
135
136 uint8_t hpd_src;
137
138 uint8_t link_enc_hw_inst;
139
140
141
142
143 enum engine_id eng_id;
144
145 bool test_pattern_enabled;
146 union compliance_test_state compliance_test_state;
147
148 void *priv;
149
150 struct ddc_service *ddc;
151
152 bool aux_mode;
153
154
155
156 const struct dc *dc;
157
158 struct dc_context *ctx;
159
160 struct panel_cntl *panel_cntl;
161 struct link_encoder *link_enc;
162#if defined(CONFIG_DRM_AMD_DC_DCN)
163 struct hpo_dp_link_encoder *hpo_dp_link_enc;
164#endif
165 struct graphics_object_id link_id;
166
167
168
169
170 enum display_endpoint_type ep_type;
171 union ddi_channel_mapping ddi_channel_mapping;
172 struct connector_device_tag_info device_tag;
173 struct dpcd_caps dpcd_caps;
174 uint32_t dongle_max_pix_clk;
175 unsigned short chip_caps;
176 unsigned int dpcd_sink_count;
177#if defined(CONFIG_DRM_AMD_DC_HDCP)
178 struct hdcp_caps hdcp_caps;
179#endif
180 enum edp_revision edp_revision;
181 union dpcd_sink_ext_caps dpcd_sink_ext_caps;
182
183 struct psr_settings psr_settings;
184
185
186 struct dc_lane_settings bios_forced_drive_settings;
187
188
189 struct link_flags {
190 bool dp_keep_receiver_powered;
191 bool dp_skip_DID2;
192 bool dp_skip_reset_segment;
193 bool dp_mot_reset_segment;
194
195 bool dpia_mst_dsc_always_on;
196 } wa_flags;
197 struct link_mst_stream_allocation_table mst_stream_alloc_table;
198
199 struct dc_link_status link_status;
200
201 struct link_trace link_trace;
202 struct gpio *hpd_gpio;
203 enum dc_link_fec_state fec_state;
204};
205
206const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
207
208
209
210
211
212
213
214
215static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
216{
217 return dc->links[link_index];
218}
219
220static inline void get_edp_links(const struct dc *dc,
221 struct dc_link **edp_links,
222 int *edp_num)
223{
224 int i;
225
226 *edp_num = 0;
227 for (i = 0; i < dc->link_count; i++) {
228
229 if (!dc->links[i])
230 continue;
231 if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP) {
232 edp_links[*edp_num] = dc->links[i];
233 if (++(*edp_num) == MAX_NUM_EDP)
234 return;
235 }
236 }
237}
238
239static inline bool dc_get_edp_link_panel_inst(const struct dc *dc,
240 const struct dc_link *link,
241 unsigned int *inst_out)
242{
243 struct dc_link *edp_links[MAX_NUM_EDP];
244 int edp_num;
245
246 if (link->connector_signal != SIGNAL_TYPE_EDP)
247 return false;
248 get_edp_links(dc, edp_links, &edp_num);
249 if ((edp_num > 1) && (link->link_index > edp_links[0]->link_index))
250 *inst_out = 1;
251 else
252 *inst_out = 0;
253 return true;
254}
255
256
257
258
259
260bool dc_link_set_backlight_level(const struct dc_link *dc_link,
261 uint32_t backlight_pwm_u16_16,
262 uint32_t frame_ramp);
263
264
265bool dc_link_set_backlight_level_nits(struct dc_link *link,
266 bool isHDR,
267 uint32_t backlight_millinits,
268 uint32_t transition_time_in_ms);
269
270bool dc_link_get_backlight_level_nits(struct dc_link *link,
271 uint32_t *backlight_millinits,
272 uint32_t *backlight_millinits_peak);
273
274bool dc_link_backlight_enable_aux(struct dc_link *link, bool enable);
275
276bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_millinits);
277bool dc_link_set_default_brightness_aux(struct dc_link *link);
278
279int dc_link_get_backlight_level(const struct dc_link *dc_link);
280
281int dc_link_get_target_backlight_pwm(const struct dc_link *link);
282
283bool dc_link_set_psr_allow_active(struct dc_link *dc_link, const bool *enable,
284 bool wait, bool force_static, const unsigned int *power_opts);
285
286bool dc_link_get_psr_state(const struct dc_link *dc_link, enum dc_psr_state *state);
287
288bool dc_link_setup_psr(struct dc_link *dc_link,
289 const struct dc_stream_state *stream, struct psr_config *psr_config,
290 struct psr_context *psr_context);
291
292void dc_link_get_psr_residency(const struct dc_link *link, uint32_t *residency);
293
294
295
296
297
298
299
300enum dc_detect_reason {
301 DETECT_REASON_BOOT,
302 DETECT_REASON_HPD,
303 DETECT_REASON_HPDRX,
304 DETECT_REASON_FALLBACK,
305 DETECT_REASON_RETRAIN
306};
307
308bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
309bool dc_link_get_hpd_state(struct dc_link *dc_link);
310enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx);
311#if defined(CONFIG_DRM_AMD_DC_DCN)
312enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
313enum dc_status dc_link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
314#endif
315
316
317
318
319
320
321
322bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link,
323 union hpd_irq_data *hpd_irq_dpcd_data, bool *out_link_loss,
324 bool defer_handling, bool *has_left_work);
325
326
327
328
329
330
331bool dc_link_wait_for_t12(struct dc_link *link);
332
333void dc_link_dp_handle_automated_test(struct dc_link *link);
334void dc_link_dp_handle_link_loss(struct dc_link *link);
335bool dc_link_dp_allow_hpd_rx_irq(const struct dc_link *link);
336
337struct dc_sink_init_data;
338
339struct dc_sink *dc_link_add_remote_sink(
340 struct dc_link *dc_link,
341 const uint8_t *edid,
342 int len,
343 struct dc_sink_init_data *init_data);
344
345void dc_link_remove_remote_sink(
346 struct dc_link *link,
347 struct dc_sink *sink);
348
349
350
351void dc_link_dp_set_drive_settings(
352 struct dc_link *link,
353 struct link_training_settings *lt_settings);
354
355bool dc_link_dp_perform_link_training_skip_aux(
356 struct dc_link *link,
357 const struct dc_link_settings *link_setting);
358
359enum link_training_result dc_link_dp_perform_link_training(
360 struct dc_link *link,
361 const struct dc_link_settings *link_settings,
362 bool skip_video_pattern);
363
364bool dc_link_dp_sync_lt_begin(struct dc_link *link);
365
366enum link_training_result dc_link_dp_sync_lt_attempt(
367 struct dc_link *link,
368 struct dc_link_settings *link_setting,
369 struct dc_link_training_overrides *lt_settings);
370
371bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down);
372
373void dc_link_dp_enable_hpd(const struct dc_link *link);
374
375void dc_link_dp_disable_hpd(const struct dc_link *link);
376
377bool dc_link_dp_set_test_pattern(
378 struct dc_link *link,
379 enum dp_test_pattern test_pattern,
380 enum dp_test_pattern_color_space test_pattern_color_space,
381 const struct link_training_settings *p_link_settings,
382 const unsigned char *p_custom_pattern,
383 unsigned int cust_pattern_size);
384
385bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap);
386
387void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
388
389bool dc_link_is_dp_sink_present(struct dc_link *link);
390
391bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type);
392
393
394
395
396#ifdef CONFIG_DRM_AMD_DC_HDCP
397bool dc_link_is_hdcp14(struct dc_link *link, enum signal_type signal);
398bool dc_link_is_hdcp22(struct dc_link *link, enum signal_type signal);
399#endif
400void dc_link_set_drive_settings(struct dc *dc,
401 struct link_training_settings *lt_settings,
402 const struct dc_link *link);
403void dc_link_set_preferred_link_settings(struct dc *dc,
404 struct dc_link_settings *link_setting,
405 struct dc_link *link);
406void dc_link_set_preferred_training_settings(struct dc *dc,
407 struct dc_link_settings *link_setting,
408 struct dc_link_training_overrides *lt_overrides,
409 struct dc_link *link,
410 bool skip_immediate_retrain);
411void dc_link_enable_hpd(const struct dc_link *link);
412void dc_link_disable_hpd(const struct dc_link *link);
413void dc_link_set_test_pattern(struct dc_link *link,
414 enum dp_test_pattern test_pattern,
415 enum dp_test_pattern_color_space test_pattern_color_space,
416 const struct link_training_settings *p_link_settings,
417 const unsigned char *p_custom_pattern,
418 unsigned int cust_pattern_size);
419uint32_t dc_link_bandwidth_kbps(
420 const struct dc_link *link,
421 const struct dc_link_settings *link_setting);
422
423const struct dc_link_settings *dc_link_get_link_cap(
424 const struct dc_link *link);
425
426void dc_link_overwrite_extended_receiver_cap(
427 struct dc_link *link);
428
429bool dc_submit_i2c(
430 struct dc *dc,
431 uint32_t link_index,
432 struct i2c_command *cmd);
433
434bool dc_submit_i2c_oem(
435 struct dc *dc,
436 struct i2c_command *cmd);
437
438uint32_t dc_bandwidth_in_kbps_from_timing(
439 const struct dc_crtc_timing *timing);
440
441bool dc_link_is_fec_supported(const struct dc_link *link);
442bool dc_link_should_enable_fec(const struct dc_link *link);
443
444#if defined(CONFIG_DRM_AMD_DC_DCN)
445enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link);
446#endif
447#endif
448