1 /*
2 * Copyright 2023 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 /* FILE POLICY AND INTENDED USAGE:
27 * This file owns the creation/destruction of link structure.
28 */
29 #include "link_factory.h"
30 #include "link_detection.h"
31 #include "link_resource.h"
32 #include "link_validation.h"
33 #include "link_dpms.h"
34 #include "accessories/link_dp_cts.h"
35 #include "accessories/link_dp_trace.h"
36 #include "accessories/link_fpga.h"
37 #include "protocols/link_ddc.h"
38 #include "protocols/link_dp_capability.h"
39 #include "protocols/link_dp_dpia_bw.h"
40 #include "protocols/link_dp_dpia.h"
41 #include "protocols/link_dp_irq_handler.h"
42 #include "protocols/link_dp_phy.h"
43 #include "protocols/link_dp_training.h"
44 #include "protocols/link_edp_panel_control.h"
45 #include "protocols/link_hpd.h"
46 #include "gpio_service_interface.h"
47 #include "atomfirmware.h"
48
49 #define DC_LOGGER_INIT(logger)
50
51 #define LINK_INFO(...) \
52 DC_LOG_HW_HOTPLUG( \
53 __VA_ARGS__)
54
55 /* link factory owns the creation/destruction of link structures. */
construct_link_service_factory(struct link_service * link_srv)56 static void construct_link_service_factory(struct link_service *link_srv)
57 {
58
59 link_srv->create_link = link_create;
60 link_srv->destroy_link = link_destroy;
61 }
62
63 /* link_detection manages link detection states and receiver states by using
64 * various link protocols. It also provides helper functions to interpret
65 * certain capabilities or status based on the states it manages or retrieve
66 * them directly from connected receivers.
67 */
construct_link_service_detection(struct link_service * link_srv)68 static void construct_link_service_detection(struct link_service *link_srv)
69 {
70 link_srv->detect_link = link_detect;
71 link_srv->detect_connection_type = link_detect_connection_type;
72 link_srv->add_remote_sink = link_add_remote_sink;
73 link_srv->remove_remote_sink = link_remove_remote_sink;
74 link_srv->get_hpd_state = link_get_hpd_state;
75 link_srv->get_hpd_gpio = link_get_hpd_gpio;
76 link_srv->enable_hpd = link_enable_hpd;
77 link_srv->disable_hpd = link_disable_hpd;
78 link_srv->enable_hpd_filter = link_enable_hpd_filter;
79 link_srv->reset_cur_dp_mst_topology = link_reset_cur_dp_mst_topology;
80 link_srv->get_status = link_get_status;
81 link_srv->is_hdcp1x_supported = link_is_hdcp14;
82 link_srv->is_hdcp2x_supported = link_is_hdcp22;
83 link_srv->clear_dprx_states = link_clear_dprx_states;
84 }
85
86 /* link resource implements accessors to link resource. */
construct_link_service_resource(struct link_service * link_srv)87 static void construct_link_service_resource(struct link_service *link_srv)
88 {
89 link_srv->get_cur_res_map = link_get_cur_res_map;
90 link_srv->restore_res_map = link_restore_res_map;
91 link_srv->get_cur_link_res = link_get_cur_link_res;
92 }
93
94 /* link validation owns timing validation against various link limitations. (ex.
95 * link bandwidth, receiver capability or our hardware capability) It also
96 * provides helper functions exposing bandwidth formulas used in validation.
97 */
construct_link_service_validation(struct link_service * link_srv)98 static void construct_link_service_validation(struct link_service *link_srv)
99 {
100 link_srv->validate_mode_timing = link_validate_mode_timing;
101 link_srv->dp_link_bandwidth_kbps = dp_link_bandwidth_kbps;
102 link_srv->validate_dpia_bandwidth = link_validate_dpia_bandwidth;
103 }
104
105 /* link dpms owns the programming sequence of stream's dpms state associated
106 * with the link and link's enable/disable sequences as result of the stream's
107 * dpms state change.
108 */
construct_link_service_dpms(struct link_service * link_srv)109 static void construct_link_service_dpms(struct link_service *link_srv)
110 {
111 link_srv->set_dpms_on = link_set_dpms_on;
112 link_srv->set_dpms_off = link_set_dpms_off;
113 link_srv->resume = link_resume;
114 link_srv->blank_all_dp_displays = link_blank_all_dp_displays;
115 link_srv->blank_all_edp_displays = link_blank_all_edp_displays;
116 link_srv->blank_dp_stream = link_blank_dp_stream;
117 link_srv->increase_mst_payload = link_increase_mst_payload;
118 link_srv->reduce_mst_payload = link_reduce_mst_payload;
119 link_srv->set_dsc_on_stream = link_set_dsc_on_stream;
120 link_srv->set_dsc_enable = link_set_dsc_enable;
121 link_srv->update_dsc_config = link_update_dsc_config;
122 }
123
124 /* link ddc implements generic display communication protocols such as i2c, aux
125 * and scdc. It should not contain any specific applications of these
126 * protocols such as display capability query, detection, or handshaking such as
127 * link training.
128 */
construct_link_service_ddc(struct link_service * link_srv)129 static void construct_link_service_ddc(struct link_service *link_srv)
130 {
131 link_srv->create_ddc_service = link_create_ddc_service;
132 link_srv->destroy_ddc_service = link_destroy_ddc_service;
133 link_srv->query_ddc_data = link_query_ddc_data;
134 link_srv->aux_transfer_raw = link_aux_transfer_raw;
135 link_srv->configure_fixed_vs_pe_retimer = link_configure_fixed_vs_pe_retimer;
136 link_srv->aux_transfer_with_retries_no_mutex =
137 link_aux_transfer_with_retries_no_mutex;
138 link_srv->is_in_aux_transaction_mode = link_is_in_aux_transaction_mode;
139 link_srv->get_aux_defer_delay = link_get_aux_defer_delay;
140 }
141
142 /* link dp capability implements dp specific link capability retrieval sequence.
143 * It is responsible for retrieving, parsing, overriding, deciding capability
144 * obtained from dp link. Link capability consists of encoders, DPRXs, cables,
145 * retimers, usb and all other possible backend capabilities.
146 */
construct_link_service_dp_capability(struct link_service * link_srv)147 static void construct_link_service_dp_capability(struct link_service *link_srv)
148 {
149 link_srv->dp_is_sink_present = dp_is_sink_present;
150 link_srv->dp_is_fec_supported = dp_is_fec_supported;
151 link_srv->dp_is_128b_132b_signal = dp_is_128b_132b_signal;
152 link_srv->dp_get_max_link_enc_cap = dp_get_max_link_enc_cap;
153 link_srv->dp_get_verified_link_cap = dp_get_verified_link_cap;
154 link_srv->dp_get_encoding_format = link_dp_get_encoding_format;
155 link_srv->dp_should_enable_fec = dp_should_enable_fec;
156 link_srv->dp_decide_link_settings = link_decide_link_settings;
157 link_srv->mst_decide_link_encoding_format =
158 mst_decide_link_encoding_format;
159 link_srv->edp_decide_link_settings = edp_decide_link_settings;
160 link_srv->bw_kbps_from_raw_frl_link_rate_data =
161 link_bw_kbps_from_raw_frl_link_rate_data;
162 link_srv->dp_overwrite_extended_receiver_cap =
163 dp_overwrite_extended_receiver_cap;
164 link_srv->dp_decide_lttpr_mode = dp_decide_lttpr_mode;
165 }
166
167 /* link dp phy/dpia implements basic dp phy/dpia functionality such as
168 * enable/disable output and set lane/drive settings. It is responsible for
169 * maintaining and update software state representing current phy/dpia status
170 * such as current link settings.
171 */
construct_link_service_dp_phy_or_dpia(struct link_service * link_srv)172 static void construct_link_service_dp_phy_or_dpia(struct link_service *link_srv)
173 {
174 link_srv->dpia_handle_usb4_bandwidth_allocation_for_link =
175 dpia_handle_usb4_bandwidth_allocation_for_link;
176 link_srv->dpia_handle_bw_alloc_response = dpia_handle_bw_alloc_response;
177 link_srv->dp_set_drive_settings = dp_set_drive_settings;
178 link_srv->dpcd_write_rx_power_ctrl = dpcd_write_rx_power_ctrl;
179 }
180
181 /* link dp irq handler implements DP HPD short pulse handling sequence according
182 * to DP specifications
183 */
construct_link_service_dp_irq_handler(struct link_service * link_srv)184 static void construct_link_service_dp_irq_handler(struct link_service *link_srv)
185 {
186 link_srv->dp_parse_link_loss_status = dp_parse_link_loss_status;
187 link_srv->dp_should_allow_hpd_rx_irq = dp_should_allow_hpd_rx_irq;
188 link_srv->dp_handle_link_loss = dp_handle_link_loss;
189 link_srv->dp_read_hpd_rx_irq_data = dp_read_hpd_rx_irq_data;
190 link_srv->dp_handle_hpd_rx_irq = dp_handle_hpd_rx_irq;
191 }
192
193 /* link edp panel control implements retrieval and configuration of eDP panel
194 * features such as PSR and ABM and it also manages specs defined eDP panel
195 * power sequences.
196 */
construct_link_service_edp_panel_control(struct link_service * link_srv)197 static void construct_link_service_edp_panel_control(struct link_service *link_srv)
198 {
199 link_srv->edp_panel_backlight_power_on = edp_panel_backlight_power_on;
200 link_srv->edp_get_backlight_level = edp_get_backlight_level;
201 link_srv->edp_get_backlight_level_nits = edp_get_backlight_level_nits;
202 link_srv->edp_set_backlight_level = edp_set_backlight_level;
203 link_srv->edp_set_backlight_level_nits = edp_set_backlight_level_nits;
204 link_srv->edp_get_target_backlight_pwm = edp_get_target_backlight_pwm;
205 link_srv->edp_get_psr_state = edp_get_psr_state;
206 link_srv->edp_set_psr_allow_active = edp_set_psr_allow_active;
207 link_srv->edp_setup_psr = edp_setup_psr;
208 link_srv->edp_set_sink_vtotal_in_psr_active =
209 edp_set_sink_vtotal_in_psr_active;
210 link_srv->edp_get_psr_residency = edp_get_psr_residency;
211
212 link_srv->edp_get_replay_state = edp_get_replay_state;
213 link_srv->edp_set_replay_allow_active = edp_set_replay_allow_active;
214 link_srv->edp_setup_replay = edp_setup_replay;
215 link_srv->edp_set_coasting_vtotal = edp_set_coasting_vtotal;
216 link_srv->edp_replay_residency = edp_replay_residency;
217
218 link_srv->edp_wait_for_t12 = edp_wait_for_t12;
219 link_srv->edp_is_ilr_optimization_required =
220 edp_is_ilr_optimization_required;
221 link_srv->edp_backlight_enable_aux = edp_backlight_enable_aux;
222 link_srv->edp_add_delay_for_T9 = edp_add_delay_for_T9;
223 link_srv->edp_receiver_ready_T9 = edp_receiver_ready_T9;
224 link_srv->edp_receiver_ready_T7 = edp_receiver_ready_T7;
225 link_srv->edp_power_alpm_dpcd_enable = edp_power_alpm_dpcd_enable;
226 link_srv->edp_set_panel_power = edp_set_panel_power;
227 }
228
229 /* link dp cts implements dp compliance test automation protocols and manual
230 * testing interfaces for debugging and certification purpose.
231 */
construct_link_service_dp_cts(struct link_service * link_srv)232 static void construct_link_service_dp_cts(struct link_service *link_srv)
233 {
234 link_srv->dp_handle_automated_test = dp_handle_automated_test;
235 link_srv->dp_set_test_pattern = dp_set_test_pattern;
236 link_srv->dp_set_preferred_link_settings =
237 dp_set_preferred_link_settings;
238 link_srv->dp_set_preferred_training_settings =
239 dp_set_preferred_training_settings;
240 }
241
242 /* link dp trace implements tracing interfaces for tracking major dp sequences
243 * including execution status and timestamps
244 */
construct_link_service_dp_trace(struct link_service * link_srv)245 static void construct_link_service_dp_trace(struct link_service *link_srv)
246 {
247 link_srv->dp_trace_is_initialized = dp_trace_is_initialized;
248 link_srv->dp_trace_set_is_logged_flag = dp_trace_set_is_logged_flag;
249 link_srv->dp_trace_is_logged = dp_trace_is_logged;
250 link_srv->dp_trace_get_lt_end_timestamp = dp_trace_get_lt_end_timestamp;
251 link_srv->dp_trace_get_lt_counts = dp_trace_get_lt_counts;
252 link_srv->dp_trace_get_link_loss_count = dp_trace_get_link_loss_count;
253 link_srv->dp_trace_set_edp_power_timestamp =
254 dp_trace_set_edp_power_timestamp;
255 link_srv->dp_trace_get_edp_poweron_timestamp =
256 dp_trace_get_edp_poweron_timestamp;
257 link_srv->dp_trace_get_edp_poweroff_timestamp =
258 dp_trace_get_edp_poweroff_timestamp;
259 link_srv->dp_trace_source_sequence = dp_trace_source_sequence;
260 }
261
construct_link_service(struct link_service * link_srv)262 static void construct_link_service(struct link_service *link_srv)
263 {
264 /* All link service functions should fall under some sub categories.
265 * If a new function doesn't perfectly fall under an existing sub
266 * category, it must be that you are either adding a whole new aspect of
267 * responsibility to link service or something doesn't belong to link
268 * service. In that case please contact the arch owner to arrange a
269 * design review meeting.
270 */
271 construct_link_service_factory(link_srv);
272 construct_link_service_detection(link_srv);
273 construct_link_service_resource(link_srv);
274 construct_link_service_validation(link_srv);
275 construct_link_service_dpms(link_srv);
276 construct_link_service_ddc(link_srv);
277 construct_link_service_dp_capability(link_srv);
278 construct_link_service_dp_phy_or_dpia(link_srv);
279 construct_link_service_dp_irq_handler(link_srv);
280 construct_link_service_edp_panel_control(link_srv);
281 construct_link_service_dp_cts(link_srv);
282 construct_link_service_dp_trace(link_srv);
283 }
284
link_create_link_service(void)285 struct link_service *link_create_link_service(void)
286 {
287 struct link_service *link_srv = kzalloc(sizeof(*link_srv), GFP_KERNEL);
288
289 if (link_srv == NULL)
290 goto fail;
291
292 construct_link_service(link_srv);
293
294 return link_srv;
295 fail:
296 return NULL;
297 }
298
link_destroy_link_service(struct link_service ** link_srv)299 void link_destroy_link_service(struct link_service **link_srv)
300 {
301 kfree(*link_srv);
302 *link_srv = NULL;
303 }
304
translate_encoder_to_transmitter(struct graphics_object_id encoder)305 static enum transmitter translate_encoder_to_transmitter(
306 struct graphics_object_id encoder)
307 {
308 switch (encoder.id) {
309 case ENCODER_ID_INTERNAL_UNIPHY:
310 switch (encoder.enum_id) {
311 case ENUM_ID_1:
312 return TRANSMITTER_UNIPHY_A;
313 case ENUM_ID_2:
314 return TRANSMITTER_UNIPHY_B;
315 default:
316 return TRANSMITTER_UNKNOWN;
317 }
318 break;
319 case ENCODER_ID_INTERNAL_UNIPHY1:
320 switch (encoder.enum_id) {
321 case ENUM_ID_1:
322 return TRANSMITTER_UNIPHY_C;
323 case ENUM_ID_2:
324 return TRANSMITTER_UNIPHY_D;
325 default:
326 return TRANSMITTER_UNKNOWN;
327 }
328 break;
329 case ENCODER_ID_INTERNAL_UNIPHY2:
330 switch (encoder.enum_id) {
331 case ENUM_ID_1:
332 return TRANSMITTER_UNIPHY_E;
333 case ENUM_ID_2:
334 return TRANSMITTER_UNIPHY_F;
335 default:
336 return TRANSMITTER_UNKNOWN;
337 }
338 break;
339 case ENCODER_ID_INTERNAL_UNIPHY3:
340 switch (encoder.enum_id) {
341 case ENUM_ID_1:
342 return TRANSMITTER_UNIPHY_G;
343 default:
344 return TRANSMITTER_UNKNOWN;
345 }
346 break;
347 case ENCODER_ID_EXTERNAL_NUTMEG:
348 switch (encoder.enum_id) {
349 case ENUM_ID_1:
350 return TRANSMITTER_NUTMEG_CRT;
351 default:
352 return TRANSMITTER_UNKNOWN;
353 }
354 break;
355 case ENCODER_ID_EXTERNAL_TRAVIS:
356 switch (encoder.enum_id) {
357 case ENUM_ID_1:
358 return TRANSMITTER_TRAVIS_CRT;
359 case ENUM_ID_2:
360 return TRANSMITTER_TRAVIS_LCD;
361 default:
362 return TRANSMITTER_UNKNOWN;
363 }
364 break;
365 default:
366 return TRANSMITTER_UNKNOWN;
367 }
368 }
369
translate_dig_inst_to_pwrseq_inst(struct dc_link * link)370 static uint8_t translate_dig_inst_to_pwrseq_inst(struct dc_link *link)
371 {
372 uint8_t pwrseq_inst = 0xF;
373
374 switch (link->eng_id) {
375 case ENGINE_ID_DIGA:
376 pwrseq_inst = 0;
377 break;
378 case ENGINE_ID_DIGB:
379 pwrseq_inst = 1;
380 break;
381 default:
382 DC_LOG_WARNING("Unsupported pwrseq engine id: %d!\n", link->eng_id);
383 ASSERT(false);
384 break;
385 }
386
387 return pwrseq_inst;
388 }
389
390
link_destruct(struct dc_link * link)391 static void link_destruct(struct dc_link *link)
392 {
393 int i;
394
395 if (link->hpd_gpio) {
396 dal_gpio_destroy_irq(&link->hpd_gpio);
397 link->hpd_gpio = NULL;
398 }
399
400 if (link->ddc)
401 link_destroy_ddc_service(&link->ddc);
402
403 if (link->panel_cntl)
404 link->panel_cntl->funcs->destroy(&link->panel_cntl);
405
406 if (link->link_enc) {
407 /* Update link encoder resource tracking variables. These are used for
408 * the dynamic assignment of link encoders to streams. Virtual links
409 * are not assigned encoder resources on creation.
410 */
411 if (link->link_id.id != CONNECTOR_ID_VIRTUAL) {
412 link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = NULL;
413 link->dc->res_pool->dig_link_enc_count--;
414 }
415 link->link_enc->funcs->destroy(&link->link_enc);
416 }
417
418 if (link->local_sink)
419 dc_sink_release(link->local_sink);
420
421 for (i = 0; i < link->sink_count; ++i)
422 dc_sink_release(link->remote_sinks[i]);
423 }
424
get_ddc_line(struct dc_link * link)425 static enum channel_id get_ddc_line(struct dc_link *link)
426 {
427 struct ddc *ddc;
428 enum channel_id channel;
429
430 channel = CHANNEL_ID_UNKNOWN;
431
432 ddc = get_ddc_pin(link->ddc);
433
434 if (ddc) {
435 switch (dal_ddc_get_line(ddc)) {
436 case GPIO_DDC_LINE_DDC1:
437 channel = CHANNEL_ID_DDC1;
438 break;
439 case GPIO_DDC_LINE_DDC2:
440 channel = CHANNEL_ID_DDC2;
441 break;
442 case GPIO_DDC_LINE_DDC3:
443 channel = CHANNEL_ID_DDC3;
444 break;
445 case GPIO_DDC_LINE_DDC4:
446 channel = CHANNEL_ID_DDC4;
447 break;
448 case GPIO_DDC_LINE_DDC5:
449 channel = CHANNEL_ID_DDC5;
450 break;
451 case GPIO_DDC_LINE_DDC6:
452 channel = CHANNEL_ID_DDC6;
453 break;
454 case GPIO_DDC_LINE_DDC_VGA:
455 channel = CHANNEL_ID_DDC_VGA;
456 break;
457 case GPIO_DDC_LINE_I2C_PAD:
458 channel = CHANNEL_ID_I2C_PAD;
459 break;
460 default:
461 BREAK_TO_DEBUGGER();
462 break;
463 }
464 }
465
466 return channel;
467 }
468
construct_phy(struct dc_link * link,const struct link_init_data * init_params)469 static bool construct_phy(struct dc_link *link,
470 const struct link_init_data *init_params)
471 {
472 uint8_t i;
473 struct ddc_service_init_data ddc_service_init_data = { 0 };
474 struct dc_context *dc_ctx = init_params->ctx;
475 struct encoder_init_data enc_init_data = { 0 };
476 struct panel_cntl_init_data panel_cntl_init_data = { 0 };
477 struct integrated_info info = { 0 };
478 struct dc_bios *bios = init_params->dc->ctx->dc_bios;
479 const struct dc_vbios_funcs *bp_funcs = bios->funcs;
480 struct bp_disp_connector_caps_info disp_connect_caps_info = { 0 };
481
482 DC_LOGGER_INIT(dc_ctx->logger);
483
484 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
485 link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
486 link->link_status.dpcd_caps = &link->dpcd_caps;
487
488 link->dc = init_params->dc;
489 link->ctx = dc_ctx;
490 link->link_index = init_params->link_index;
491
492 memset(&link->preferred_training_settings, 0,
493 sizeof(struct dc_link_training_overrides));
494 memset(&link->preferred_link_setting, 0,
495 sizeof(struct dc_link_settings));
496
497 link->link_id =
498 bios->funcs->get_connector_id(bios, init_params->connector_index);
499
500 link->ep_type = DISPLAY_ENDPOINT_PHY;
501
502 DC_LOG_DC("BIOS object table - link_id: %d", link->link_id.id);
503
504 if (bios->funcs->get_disp_connector_caps_info) {
505 bios->funcs->get_disp_connector_caps_info(bios, link->link_id, &disp_connect_caps_info);
506 link->is_internal_display = disp_connect_caps_info.INTERNAL_DISPLAY;
507 DC_LOG_DC("BIOS object table - is_internal_display: %d", link->is_internal_display);
508 }
509
510 if (link->link_id.type != OBJECT_TYPE_CONNECTOR) {
511 dm_output_to_console("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",
512 __func__, init_params->connector_index,
513 link->link_id.type, OBJECT_TYPE_CONNECTOR);
514 goto create_fail;
515 }
516
517 if (link->dc->res_pool->funcs->link_init)
518 link->dc->res_pool->funcs->link_init(link);
519
520 link->hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
521 link->ctx->gpio_service);
522
523 if (link->hpd_gpio) {
524 dal_gpio_open(link->hpd_gpio, GPIO_MODE_INTERRUPT);
525 dal_gpio_unlock_pin(link->hpd_gpio);
526 link->irq_source_hpd = dal_irq_get_source(link->hpd_gpio);
527
528 DC_LOG_DC("BIOS object table - hpd_gpio id: %d", link->hpd_gpio->id);
529 DC_LOG_DC("BIOS object table - hpd_gpio en: %d", link->hpd_gpio->en);
530 }
531
532 switch (link->link_id.id) {
533 case CONNECTOR_ID_HDMI_TYPE_A:
534 link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A;
535
536 break;
537 case CONNECTOR_ID_SINGLE_LINK_DVID:
538 case CONNECTOR_ID_SINGLE_LINK_DVII:
539 link->connector_signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
540 break;
541 case CONNECTOR_ID_DUAL_LINK_DVID:
542 case CONNECTOR_ID_DUAL_LINK_DVII:
543 link->connector_signal = SIGNAL_TYPE_DVI_DUAL_LINK;
544 break;
545 case CONNECTOR_ID_DISPLAY_PORT:
546 case CONNECTOR_ID_USBC:
547 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
548
549 if (link->hpd_gpio)
550 link->irq_source_hpd_rx =
551 dal_irq_get_rx_source(link->hpd_gpio);
552
553 break;
554 case CONNECTOR_ID_EDP:
555 link->connector_signal = SIGNAL_TYPE_EDP;
556
557 if (link->hpd_gpio) {
558 if (!link->dc->config.allow_edp_hotplug_detection)
559 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
560
561 switch (link->dc->config.allow_edp_hotplug_detection) {
562 case HPD_EN_FOR_ALL_EDP:
563 link->irq_source_hpd_rx =
564 dal_irq_get_rx_source(link->hpd_gpio);
565 break;
566 case HPD_EN_FOR_PRIMARY_EDP_ONLY:
567 if (link->link_index == 0)
568 link->irq_source_hpd_rx =
569 dal_irq_get_rx_source(link->hpd_gpio);
570 else
571 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
572 break;
573 case HPD_EN_FOR_SECONDARY_EDP_ONLY:
574 if (link->link_index == 1)
575 link->irq_source_hpd_rx =
576 dal_irq_get_rx_source(link->hpd_gpio);
577 else
578 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
579 break;
580 default:
581 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
582 break;
583 }
584 }
585
586 break;
587 case CONNECTOR_ID_LVDS:
588 link->connector_signal = SIGNAL_TYPE_LVDS;
589 break;
590 default:
591 DC_LOG_WARNING("Unsupported Connector type:%d!\n",
592 link->link_id.id);
593 goto create_fail;
594 }
595
596 LINK_INFO("Connector[%d] description: signal: %s\n",
597 init_params->connector_index,
598 signal_type_to_string(link->connector_signal));
599
600 ddc_service_init_data.ctx = link->ctx;
601 ddc_service_init_data.id = link->link_id;
602 ddc_service_init_data.link = link;
603 link->ddc = link_create_ddc_service(&ddc_service_init_data);
604
605 if (!link->ddc) {
606 DC_ERROR("Failed to create ddc_service!\n");
607 goto ddc_create_fail;
608 }
609
610 if (!link->ddc->ddc_pin) {
611 DC_ERROR("Failed to get I2C info for connector!\n");
612 goto ddc_create_fail;
613 }
614
615 link->ddc_hw_inst =
616 dal_ddc_get_line(get_ddc_pin(link->ddc));
617
618 enc_init_data.ctx = dc_ctx;
619 bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0,
620 &enc_init_data.encoder);
621 enc_init_data.connector = link->link_id;
622 enc_init_data.channel = get_ddc_line(link);
623 enc_init_data.hpd_source = get_hpd_line(link);
624
625 link->hpd_src = enc_init_data.hpd_source;
626
627 enc_init_data.transmitter =
628 translate_encoder_to_transmitter(enc_init_data.encoder);
629 link->link_enc =
630 link->dc->res_pool->funcs->link_enc_create(dc_ctx, &enc_init_data);
631
632 DC_LOG_DC("BIOS object table - DP_IS_USB_C: %d", link->link_enc->features.flags.bits.DP_IS_USB_C);
633 DC_LOG_DC("BIOS object table - IS_DP2_CAPABLE: %d", link->link_enc->features.flags.bits.IS_DP2_CAPABLE);
634
635 if (!link->link_enc) {
636 DC_ERROR("Failed to create link encoder!\n");
637 goto link_enc_create_fail;
638 }
639
640 /* Update link encoder tracking variables. These are used for the dynamic
641 * assignment of link encoders to streams.
642 */
643 link->eng_id = link->link_enc->preferred_engine;
644 link->dc->res_pool->link_encoders[link->eng_id - ENGINE_ID_DIGA] = link->link_enc;
645 link->dc->res_pool->dig_link_enc_count++;
646
647 link->link_enc_hw_inst = link->link_enc->transmitter;
648
649 if (link->dc->res_pool->funcs->panel_cntl_create &&
650 (link->link_id.id == CONNECTOR_ID_EDP ||
651 link->link_id.id == CONNECTOR_ID_LVDS)) {
652 panel_cntl_init_data.ctx = dc_ctx;
653 panel_cntl_init_data.inst = panel_cntl_init_data.ctx->dc_edp_id_count;
654 panel_cntl_init_data.pwrseq_inst = translate_dig_inst_to_pwrseq_inst(link);
655 link->panel_cntl =
656 link->dc->res_pool->funcs->panel_cntl_create(
657 &panel_cntl_init_data);
658 panel_cntl_init_data.ctx->dc_edp_id_count++;
659
660 if (link->panel_cntl == NULL) {
661 DC_ERROR("Failed to create link panel_cntl!\n");
662 goto panel_cntl_create_fail;
663 }
664 }
665 for (i = 0; i < 4; i++) {
666 if (bp_funcs->get_device_tag(dc_ctx->dc_bios,
667 link->link_id, i,
668 &link->device_tag) != BP_RESULT_OK) {
669 DC_ERROR("Failed to find device tag!\n");
670 goto device_tag_fail;
671 }
672
673 /* Look for device tag that matches connector signal,
674 * CRT for rgb, LCD for other supported signal tyes
675 */
676 if (!bp_funcs->is_device_id_supported(dc_ctx->dc_bios,
677 link->device_tag.dev_id))
678 continue;
679 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_CRT &&
680 link->connector_signal != SIGNAL_TYPE_RGB)
681 continue;
682 if (link->device_tag.dev_id.device_type == DEVICE_TYPE_LCD &&
683 link->connector_signal == SIGNAL_TYPE_RGB)
684 continue;
685
686 DC_LOG_DC("BIOS object table - device_tag.acpi_device: %d", link->device_tag.acpi_device);
687 DC_LOG_DC("BIOS object table - device_tag.dev_id.device_type: %d", link->device_tag.dev_id.device_type);
688 DC_LOG_DC("BIOS object table - device_tag.dev_id.enum_id: %d", link->device_tag.dev_id.enum_id);
689 break;
690 }
691
692 if (bios->integrated_info)
693 info = *bios->integrated_info;
694
695 /* Look for channel mapping corresponding to connector and device tag */
696 for (i = 0; i < MAX_NUMBER_OF_EXT_DISPLAY_PATH; i++) {
697 struct external_display_path *path =
698 &info.ext_disp_conn_info.path[i];
699
700 if (path->device_connector_id.enum_id == link->link_id.enum_id &&
701 path->device_connector_id.id == link->link_id.id &&
702 path->device_connector_id.type == link->link_id.type) {
703 if (link->device_tag.acpi_device != 0 &&
704 path->device_acpi_enum == link->device_tag.acpi_device) {
705 link->ddi_channel_mapping = path->channel_mapping;
706 link->chip_caps = path->caps;
707 DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw);
708 DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps);
709 } else if (path->device_tag ==
710 link->device_tag.dev_id.raw_device_tag) {
711 link->ddi_channel_mapping = path->channel_mapping;
712 link->chip_caps = path->caps;
713 DC_LOG_DC("BIOS object table - ddi_channel_mapping: 0x%04X", link->ddi_channel_mapping.raw);
714 DC_LOG_DC("BIOS object table - chip_caps: %d", link->chip_caps);
715 }
716
717 if (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) {
718 link->bios_forced_drive_settings.VOLTAGE_SWING =
719 (info.ext_disp_conn_info.fixdpvoltageswing & 0x3);
720 link->bios_forced_drive_settings.PRE_EMPHASIS =
721 ((info.ext_disp_conn_info.fixdpvoltageswing >> 2) & 0x3);
722 }
723
724 break;
725 }
726 }
727
728 if (bios->funcs->get_atom_dc_golden_table)
729 bios->funcs->get_atom_dc_golden_table(bios);
730
731 /*
732 * TODO check if GPIO programmed correctly
733 *
734 * If GPIO isn't programmed correctly HPD might not rise or drain
735 * fast enough, leading to bounces.
736 */
737 program_hpd_filter(link);
738
739 link->psr_settings.psr_vtotal_control_support = false;
740 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
741
742 DC_LOG_DC("BIOS object table - %s finished successfully.\n", __func__);
743 return true;
744 device_tag_fail:
745 link->link_enc->funcs->destroy(&link->link_enc);
746 link_enc_create_fail:
747 if (link->panel_cntl != NULL)
748 link->panel_cntl->funcs->destroy(&link->panel_cntl);
749 panel_cntl_create_fail:
750 link_destroy_ddc_service(&link->ddc);
751 ddc_create_fail:
752 create_fail:
753
754 if (link->hpd_gpio) {
755 dal_gpio_destroy_irq(&link->hpd_gpio);
756 link->hpd_gpio = NULL;
757 }
758
759 DC_LOG_DC("BIOS object table - %s failed.\n", __func__);
760 return false;
761 }
762
construct_dpia(struct dc_link * link,const struct link_init_data * init_params)763 static bool construct_dpia(struct dc_link *link,
764 const struct link_init_data *init_params)
765 {
766 struct ddc_service_init_data ddc_service_init_data = { 0 };
767 struct dc_context *dc_ctx = init_params->ctx;
768
769 DC_LOGGER_INIT(dc_ctx->logger);
770
771 /* Initialized irq source for hpd and hpd rx */
772 link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
773 link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
774 link->link_status.dpcd_caps = &link->dpcd_caps;
775
776 link->dc = init_params->dc;
777 link->ctx = dc_ctx;
778 link->link_index = init_params->link_index;
779
780 memset(&link->preferred_training_settings, 0,
781 sizeof(struct dc_link_training_overrides));
782 memset(&link->preferred_link_setting, 0,
783 sizeof(struct dc_link_settings));
784
785 /* Dummy Init for linkid */
786 link->link_id.type = OBJECT_TYPE_CONNECTOR;
787 link->link_id.id = CONNECTOR_ID_DISPLAY_PORT;
788 link->link_id.enum_id = ENUM_ID_1 + init_params->connector_index;
789 link->is_internal_display = false;
790 link->connector_signal = SIGNAL_TYPE_DISPLAY_PORT;
791 LINK_INFO("Connector[%d] description:signal %d\n",
792 init_params->connector_index,
793 link->connector_signal);
794
795 link->ep_type = DISPLAY_ENDPOINT_USB4_DPIA;
796 link->is_dig_mapping_flexible = true;
797
798 /* TODO: Initialize link : funcs->link_init */
799
800 ddc_service_init_data.ctx = link->ctx;
801 ddc_service_init_data.id = link->link_id;
802 ddc_service_init_data.link = link;
803 /* Set indicator for dpia link so that ddc wont be created */
804 ddc_service_init_data.is_dpia_link = true;
805
806 link->ddc = link_create_ddc_service(&ddc_service_init_data);
807 if (!link->ddc) {
808 DC_ERROR("Failed to create ddc_service!\n");
809 goto ddc_create_fail;
810 }
811
812 /* Set dpia port index : 0 to number of dpia ports */
813 link->ddc_hw_inst = init_params->connector_index;
814
815 // Assign Dpia preferred eng_id
816 if (link->dc->res_pool->funcs->get_preferred_eng_id_dpia)
817 link->dpia_preferred_eng_id = link->dc->res_pool->funcs->get_preferred_eng_id_dpia(link->ddc_hw_inst);
818
819 /* TODO: Create link encoder */
820
821 link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
822
823 /* Some docks seem to NAK I2C writes to segment pointer with mot=0. */
824 link->wa_flags.dp_mot_reset_segment = true;
825
826 return true;
827
828 ddc_create_fail:
829 return false;
830 }
831
link_construct(struct dc_link * link,const struct link_init_data * init_params)832 static bool link_construct(struct dc_link *link,
833 const struct link_init_data *init_params)
834 {
835 /* Handle dpia case */
836 if (init_params->is_dpia_link == true)
837 return construct_dpia(link, init_params);
838 else
839 return construct_phy(link, init_params);
840 }
841
link_create(const struct link_init_data * init_params)842 struct dc_link *link_create(const struct link_init_data *init_params)
843 {
844 struct dc_link *link =
845 kzalloc(sizeof(*link), GFP_KERNEL);
846
847 if (NULL == link)
848 goto alloc_fail;
849
850 if (false == link_construct(link, init_params))
851 goto construct_fail;
852
853 return link;
854
855 construct_fail:
856 kfree(link);
857
858 alloc_fail:
859 return NULL;
860 }
861
link_destroy(struct dc_link ** link)862 void link_destroy(struct dc_link **link)
863 {
864 link_destruct(*link);
865 kfree(*link);
866 *link = NULL;
867 }
868