2 * Copyright 2012-14 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
31 #include "grph_object_defs.h"
35 enum dc_link_fec_state {
36 dc_link_fec_not_ready,
41 struct dc_link_status {
43 struct dpcd_caps *dpcd_caps;
46 /* DP MST stream allocation (payload bandwidth number) */
47 struct link_mst_stream_allocation {
49 const struct stream_encoder *stream_enc;
50 #if defined(CONFIG_DRM_AMD_DC_DCN)
51 /* HPO DP Stream Encoder */
52 const struct hpo_dp_stream_encoder *hpo_dp_stream_enc;
54 /* associate DRM payload table with DC stream encoder */
56 /* number of slots required for the DP stream in transport packet */
60 /* DP MST stream allocation table */
61 struct link_mst_stream_allocation_table {
62 /* number of DP video streams */
64 /* array of stream allocations */
65 struct link_mst_stream_allocation stream_allocations[MAX_CONTROLLER_NUM];
69 uint64_t edp_poweroff;
74 struct time_stamp time_stamp;
77 /* PSR feature flags */
79 bool psr_feature_enabled; // PSR is supported by sink
80 bool psr_allow_active; // PSR is currently active
81 enum dc_psr_version psr_version; // Internal PSR version, determined based on DPCD
83 /* These parameters are calculated in Driver,
84 * based on display timing and Sink capabilities.
85 * If VBLANK region is too small and Sink takes a long time
86 * to set up RFB, it may take an extra frame to enter PSR state.
88 bool psr_frame_capture_indication_req;
89 unsigned int psr_sdp_transmit_line_num_deadline;
90 unsigned int psr_power_opt;
94 * A link contains one or more sinks and their connected status.
95 * The currently active signal type (HDMI, DP-SST, DP-MST) is also reported.
98 struct dc_sink *remote_sinks[MAX_SINKS_PER_LINK];
99 unsigned int sink_count;
100 struct dc_sink *local_sink;
101 unsigned int link_index;
102 enum dc_connection_type type;
103 enum signal_type connector_signal;
104 enum dc_irq_source irq_source_hpd;
105 enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
106 bool is_hpd_filter_disabled;
108 bool link_state_valid;
109 bool aux_access_disabled;
110 bool sync_lt_in_progress;
111 enum lttpr_mode lttpr_mode;
112 bool is_internal_display;
114 /* TODO: Rename. Flag an endpoint as having a programmable mapping to a
116 bool is_dig_mapping_flexible;
117 bool hpd_status; /* HPD status of link without physical HPD pin. */
118 bool is_hpd_pending; /* Indicates a new received hpd */
120 bool edp_sink_present;
122 /* caps is the same as reported_link_cap. link_traing use
123 * reported_link_cap. Will clean up. TODO
125 struct dc_link_settings reported_link_cap;
126 struct dc_link_settings verified_link_cap;
127 struct dc_link_settings cur_link_settings;
128 struct dc_lane_settings cur_lane_setting[LANE_COUNT_DP_MAX];
129 struct dc_link_settings preferred_link_setting;
130 /* preferred_training_settings are override values that
131 * come from DM. DM is responsible for the memory
132 * management of the override pointers.
134 struct dc_link_training_overrides preferred_training_settings;
135 struct dp_audio_test_data audio_test_data;
141 uint8_t link_enc_hw_inst;
142 /* DIG link encoder ID. Used as index in link encoder resource pool.
143 * For links with fixed mapping to DIG, this is not changed after dc_link
146 enum engine_id eng_id;
148 bool test_pattern_enabled;
149 union compliance_test_state compliance_test_state;
153 struct ddc_service *ddc;
157 /* Private to DC core */
161 struct dc_context *ctx;
163 struct panel_cntl *panel_cntl;
164 struct link_encoder *link_enc;
165 struct graphics_object_id link_id;
166 /* Endpoint type distinguishes display endpoints which do not have entries
167 * in the BIOS connector table from those that do. Helps when tracking link
168 * encoder to display endpoint assignments.
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;
180 enum edp_revision edp_revision;
181 union dpcd_sink_ext_caps dpcd_sink_ext_caps;
183 struct psr_settings psr_settings;
185 /* Drive settings read from integrated info table */
186 struct dc_lane_settings bios_forced_drive_settings;
188 /* Vendor specific LTTPR workaround variables */
189 uint8_t vendor_specific_lttpr_link_rate_wa;
190 bool apply_vendor_specific_lttpr_link_rate_wa;
192 /* MST record stream using this link */
194 bool dp_keep_receiver_powered;
196 bool dp_skip_reset_segment;
197 bool dp_mot_reset_segment;
198 /* Some USB4 docks do not handle turning off MST DSC once it has been enabled. */
199 bool dpia_mst_dsc_always_on;
201 struct link_mst_stream_allocation_table mst_stream_alloc_table;
203 struct dc_link_status link_status;
205 struct link_trace link_trace;
206 struct gpio *hpd_gpio;
207 enum dc_link_fec_state fec_state;
210 const struct dc_link_status *dc_link_get_status(const struct dc_link *dc_link);
213 * dc_get_link_at_index() - Return an enumerated dc_link.
215 * dc_link order is constant and determined at
216 * boot time. They cannot be created or destroyed.
217 * Use dc_get_caps() to get number of links.
219 static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_index)
221 return dc->links[link_index];
224 static inline void get_edp_links(const struct dc *dc,
225 struct dc_link **edp_links,
231 for (i = 0; i < dc->link_count; i++) {
232 // report any eDP links, even unconnected DDI's
235 if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP) {
236 edp_links[*edp_num] = dc->links[i];
237 if (++(*edp_num) == MAX_NUM_EDP)
243 static inline bool dc_get_edp_link_panel_inst(const struct dc *dc,
244 const struct dc_link *link,
245 unsigned int *inst_out)
247 struct dc_link *edp_links[MAX_NUM_EDP];
250 if (link->connector_signal != SIGNAL_TYPE_EDP)
252 get_edp_links(dc, edp_links, &edp_num);
253 if ((edp_num > 1) && (link->link_index > edp_links[0]->link_index))
260 /* Set backlight level of an embedded panel (eDP, LVDS).
261 * backlight_pwm_u16_16 is unsigned 32 bit with 16 bit integer
262 * and 16 bit fractional, where 1.0 is max backlight value.
264 bool dc_link_set_backlight_level(const struct dc_link *dc_link,
265 uint32_t backlight_pwm_u16_16,
266 uint32_t frame_ramp);
268 /* Set/get nits-based backlight level of an embedded panel (eDP, LVDS). */
269 bool dc_link_set_backlight_level_nits(struct dc_link *link,
271 uint32_t backlight_millinits,
272 uint32_t transition_time_in_ms);
274 bool dc_link_get_backlight_level_nits(struct dc_link *link,
275 uint32_t *backlight_millinits,
276 uint32_t *backlight_millinits_peak);
278 bool dc_link_backlight_enable_aux(struct dc_link *link, bool enable);
280 bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_millinits);
281 bool dc_link_set_default_brightness_aux(struct dc_link *link);
283 int dc_link_get_backlight_level(const struct dc_link *dc_link);
285 int dc_link_get_target_backlight_pwm(const struct dc_link *link);
287 bool dc_link_set_psr_allow_active(struct dc_link *dc_link, const bool *enable,
288 bool wait, bool force_static, const unsigned int *power_opts);
290 bool dc_link_get_psr_state(const struct dc_link *dc_link, enum dc_psr_state *state);
292 bool dc_link_setup_psr(struct dc_link *dc_link,
293 const struct dc_stream_state *stream, struct psr_config *psr_config,
294 struct psr_context *psr_context);
296 void dc_link_get_psr_residency(const struct dc_link *link, uint32_t *residency);
298 void dc_link_blank_all_dp_displays(struct dc *dc);
300 void dc_link_blank_dp_stream(struct dc_link *link, bool hw_init);
302 /* Request DC to detect if there is a Panel connected.
303 * boot - If this call is during initial boot.
304 * Return false for any type of detection failure or MST detection
305 * true otherwise. True meaning further action is required (status update
306 * and OS notification).
308 enum dc_detect_reason {
312 DETECT_REASON_FALLBACK,
313 DETECT_REASON_RETRAIN,
316 bool dc_link_detect(struct dc_link *dc_link, enum dc_detect_reason reason);
317 bool dc_link_get_hpd_state(struct dc_link *dc_link);
318 enum dc_status dc_link_allocate_mst_payload(struct pipe_ctx *pipe_ctx);
319 #if defined(CONFIG_DRM_AMD_DC_DCN)
320 enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
321 enum dc_status dc_link_increase_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t req_pbn);
324 /* Notify DC about DP RX Interrupt (aka Short Pulse Interrupt).
326 * true - Downstream port status changed. DM should call DC to do the
328 * false - no change in Downstream port status. No further action required
330 bool dc_link_handle_hpd_rx_irq(struct dc_link *dc_link,
331 union hpd_irq_data *hpd_irq_dpcd_data, bool *out_link_loss,
332 bool defer_handling, bool *has_left_work);
335 * On eDP links this function call will stall until T12 has elapsed.
336 * If the panel is not in power off state, this function will return
339 bool dc_link_wait_for_t12(struct dc_link *link);
341 void dc_link_dp_handle_automated_test(struct dc_link *link);
342 void dc_link_dp_handle_link_loss(struct dc_link *link);
343 bool dc_link_dp_allow_hpd_rx_irq(const struct dc_link *link);
345 struct dc_sink_init_data;
347 struct dc_sink *dc_link_add_remote_sink(
348 struct dc_link *dc_link,
351 struct dc_sink_init_data *init_data);
353 void dc_link_remove_remote_sink(
354 struct dc_link *link,
355 struct dc_sink *sink);
357 /* Used by diagnostics for virtual link at the moment */
359 void dc_link_dp_set_drive_settings(
360 struct dc_link *link,
361 const struct link_resource *link_res,
362 struct link_training_settings *lt_settings);
364 bool dc_link_dp_perform_link_training_skip_aux(
365 struct dc_link *link,
366 const struct link_resource *link_res,
367 const struct dc_link_settings *link_setting);
369 enum link_training_result dc_link_dp_perform_link_training(
370 struct dc_link *link,
371 const struct link_resource *link_res,
372 const struct dc_link_settings *link_settings,
373 bool skip_video_pattern);
375 bool dc_link_dp_sync_lt_begin(struct dc_link *link);
377 enum link_training_result dc_link_dp_sync_lt_attempt(
378 struct dc_link *link,
379 const struct link_resource *link_res,
380 struct dc_link_settings *link_setting,
381 struct dc_link_training_overrides *lt_settings);
383 bool dc_link_dp_sync_lt_end(struct dc_link *link, bool link_down);
385 void dc_link_dp_enable_hpd(const struct dc_link *link);
387 void dc_link_dp_disable_hpd(const struct dc_link *link);
389 bool dc_link_dp_set_test_pattern(
390 struct dc_link *link,
391 enum dp_test_pattern test_pattern,
392 enum dp_test_pattern_color_space test_pattern_color_space,
393 const struct link_training_settings *p_link_settings,
394 const unsigned char *p_custom_pattern,
395 unsigned int cust_pattern_size);
397 bool dc_link_dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap);
399 void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
401 bool dc_link_is_dp_sink_present(struct dc_link *link);
403 bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type);
405 * DPCD access interfaces
408 #ifdef CONFIG_DRM_AMD_DC_HDCP
409 bool dc_link_is_hdcp14(struct dc_link *link, enum signal_type signal);
410 bool dc_link_is_hdcp22(struct dc_link *link, enum signal_type signal);
412 void dc_link_set_drive_settings(struct dc *dc,
413 struct link_training_settings *lt_settings,
414 const struct dc_link *link);
415 void dc_link_set_preferred_link_settings(struct dc *dc,
416 struct dc_link_settings *link_setting,
417 struct dc_link *link);
418 void dc_link_set_preferred_training_settings(struct dc *dc,
419 struct dc_link_settings *link_setting,
420 struct dc_link_training_overrides *lt_overrides,
421 struct dc_link *link,
422 bool skip_immediate_retrain);
423 void dc_link_enable_hpd(const struct dc_link *link);
424 void dc_link_disable_hpd(const struct dc_link *link);
425 void dc_link_set_test_pattern(struct dc_link *link,
426 enum dp_test_pattern test_pattern,
427 enum dp_test_pattern_color_space test_pattern_color_space,
428 const struct link_training_settings *p_link_settings,
429 const unsigned char *p_custom_pattern,
430 unsigned int cust_pattern_size);
431 uint32_t dc_link_bandwidth_kbps(
432 const struct dc_link *link,
433 const struct dc_link_settings *link_setting);
435 const struct dc_link_settings *dc_link_get_link_cap(
436 const struct dc_link *link);
438 void dc_link_overwrite_extended_receiver_cap(
439 struct dc_link *link);
444 struct i2c_command *cmd);
446 bool dc_submit_i2c_oem(
448 struct i2c_command *cmd);
450 uint32_t dc_bandwidth_in_kbps_from_timing(
451 const struct dc_crtc_timing *timing);
453 bool dc_link_is_fec_supported(const struct dc_link *link);
454 bool dc_link_should_enable_fec(const struct dc_link *link);
456 #if defined(CONFIG_DRM_AMD_DC_DCN)
457 uint32_t dc_link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw);
458 enum dp_link_encoding dc_link_dp_mst_decide_link_encoding_format(const struct dc_link *link);
461 const struct link_resource *dc_link_get_cur_link_res(const struct dc_link *link);
462 /* take a snapshot of current link resource allocation state */
463 void dc_get_cur_link_res_map(const struct dc *dc, uint32_t *map);
464 /* restore link resource allocation state from a snapshot */
465 void dc_restore_link_res_map(const struct dc *dc, uint32_t *map);
466 #endif /* DC_LINK_H_ */