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