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26#include "drmP.h"
27#include "radeon_drm.h"
28#include "radeon.h"
29
30#include "atom.h"
31#include "atom-bits.h"
32#include "drm_dp_helper.h"
33
34
35#define DP_LINK_CONFIGURATION_SIZE 9
36#define DP_LINK_STATUS_SIZE 6
37#define DP_DPCD_SIZE 8
38
39static char *voltage_names[] = {
40 "0.4V", "0.6V", "0.8V", "1.2V"
41};
42static char *pre_emph_names[] = {
43 "0dB", "3.5dB", "6dB", "9.5dB"
44};
45
46static const int dp_clocks[] = {
47 54000,
48 90000,
49 108000,
50 180000,
51 216000,
52 360000,
53};
54
55static const int num_dp_clocks = sizeof(dp_clocks) / sizeof(int);
56
57
58static int dp_lanes_for_mode_clock(u8 dpcd[DP_DPCD_SIZE], int mode_clock)
59{
60 int i;
61 u8 max_link_bw;
62 u8 max_lane_count;
63
64 if (!dpcd)
65 return 0;
66
67 max_link_bw = dpcd[DP_MAX_LINK_RATE];
68 max_lane_count = dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
69
70 switch (max_link_bw) {
71 case DP_LINK_BW_1_62:
72 default:
73 for (i = 0; i < num_dp_clocks; i++) {
74 if (i % 2)
75 continue;
76 switch (max_lane_count) {
77 case 1:
78 if (i > 1)
79 return 0;
80 break;
81 case 2:
82 if (i > 3)
83 return 0;
84 break;
85 case 4:
86 default:
87 break;
88 }
89 if (dp_clocks[i] > mode_clock) {
90 if (i < 2)
91 return 1;
92 else if (i < 4)
93 return 2;
94 else
95 return 4;
96 }
97 }
98 break;
99 case DP_LINK_BW_2_7:
100 for (i = 0; i < num_dp_clocks; i++) {
101 switch (max_lane_count) {
102 case 1:
103 if (i > 1)
104 return 0;
105 break;
106 case 2:
107 if (i > 3)
108 return 0;
109 break;
110 case 4:
111 default:
112 break;
113 }
114 if (dp_clocks[i] > mode_clock) {
115 if (i < 2)
116 return 1;
117 else if (i < 4)
118 return 2;
119 else
120 return 4;
121 }
122 }
123 break;
124 }
125
126 return 0;
127}
128
129static int dp_link_clock_for_mode_clock(u8 dpcd[DP_DPCD_SIZE], int mode_clock)
130{
131 int i;
132 u8 max_link_bw;
133 u8 max_lane_count;
134
135 if (!dpcd)
136 return 0;
137
138 max_link_bw = dpcd[DP_MAX_LINK_RATE];
139 max_lane_count = dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK;
140
141 switch (max_link_bw) {
142 case DP_LINK_BW_1_62:
143 default:
144 for (i = 0; i < num_dp_clocks; i++) {
145 if (i % 2)
146 continue;
147 switch (max_lane_count) {
148 case 1:
149 if (i > 1)
150 return 0;
151 break;
152 case 2:
153 if (i > 3)
154 return 0;
155 break;
156 case 4:
157 default:
158 break;
159 }
160 if (dp_clocks[i] > mode_clock)
161 return 162000;
162 }
163 break;
164 case DP_LINK_BW_2_7:
165 for (i = 0; i < num_dp_clocks; i++) {
166 switch (max_lane_count) {
167 case 1:
168 if (i > 1)
169 return 0;
170 break;
171 case 2:
172 if (i > 3)
173 return 0;
174 break;
175 case 4:
176 default:
177 break;
178 }
179 if (dp_clocks[i] > mode_clock)
180 return (i % 2) ? 270000 : 162000;
181 }
182 }
183
184 return 0;
185}
186
187int dp_mode_valid(u8 dpcd[DP_DPCD_SIZE], int mode_clock)
188{
189 int lanes = dp_lanes_for_mode_clock(dpcd, mode_clock);
190 int dp_clock = dp_link_clock_for_mode_clock(dpcd, mode_clock);
191
192 if ((lanes == 0) || (dp_clock == 0))
193 return MODE_CLOCK_HIGH;
194
195 return MODE_OK;
196}
197
198static u8 dp_link_status(u8 link_status[DP_LINK_STATUS_SIZE], int r)
199{
200 return link_status[r - DP_LANE0_1_STATUS];
201}
202
203static u8 dp_get_lane_status(u8 link_status[DP_LINK_STATUS_SIZE],
204 int lane)
205{
206 int i = DP_LANE0_1_STATUS + (lane >> 1);
207 int s = (lane & 1) * 4;
208 u8 l = dp_link_status(link_status, i);
209 return (l >> s) & 0xf;
210}
211
212static bool dp_clock_recovery_ok(u8 link_status[DP_LINK_STATUS_SIZE],
213 int lane_count)
214{
215 int lane;
216 u8 lane_status;
217
218 for (lane = 0; lane < lane_count; lane++) {
219 lane_status = dp_get_lane_status(link_status, lane);
220 if ((lane_status & DP_LANE_CR_DONE) == 0)
221 return false;
222 }
223 return true;
224}
225
226static bool dp_channel_eq_ok(u8 link_status[DP_LINK_STATUS_SIZE],
227 int lane_count)
228{
229 u8 lane_align;
230 u8 lane_status;
231 int lane;
232
233 lane_align = dp_link_status(link_status,
234 DP_LANE_ALIGN_STATUS_UPDATED);
235 if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0)
236 return false;
237 for (lane = 0; lane < lane_count; lane++) {
238 lane_status = dp_get_lane_status(link_status, lane);
239 if ((lane_status & DP_CHANNEL_EQ_BITS) != DP_CHANNEL_EQ_BITS)
240 return false;
241 }
242 return true;
243}
244
245static u8 dp_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE],
246 int lane)
247
248{
249 int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1);
250 int s = ((lane & 1) ?
251 DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT :
252 DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT);
253 u8 l = dp_link_status(link_status, i);
254
255 return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
256}
257
258static u8 dp_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE],
259 int lane)
260{
261 int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1);
262 int s = ((lane & 1) ?
263 DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT :
264 DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT);
265 u8 l = dp_link_status(link_status, i);
266
267 return ((l >> s) & 0x3) << DP_TRAIN_PRE_EMPHASIS_SHIFT;
268}
269
270
271#define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_1200
272static u8 dp_pre_emphasis_max(u8 voltage_swing)
273{
274 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
275 case DP_TRAIN_VOLTAGE_SWING_400:
276 return DP_TRAIN_PRE_EMPHASIS_6;
277 case DP_TRAIN_VOLTAGE_SWING_600:
278 return DP_TRAIN_PRE_EMPHASIS_6;
279 case DP_TRAIN_VOLTAGE_SWING_800:
280 return DP_TRAIN_PRE_EMPHASIS_3_5;
281 case DP_TRAIN_VOLTAGE_SWING_1200:
282 default:
283 return DP_TRAIN_PRE_EMPHASIS_0;
284 }
285}
286
287static void dp_get_adjust_train(u8 link_status[DP_LINK_STATUS_SIZE],
288 int lane_count,
289 u8 train_set[4])
290{
291 u8 v = 0;
292 u8 p = 0;
293 int lane;
294
295 for (lane = 0; lane < lane_count; lane++) {
296 u8 this_v = dp_get_adjust_request_voltage(link_status, lane);
297 u8 this_p = dp_get_adjust_request_pre_emphasis(link_status, lane);
298
299 DRM_DEBUG_KMS("requested signal parameters: lane %d voltage %s pre_emph %s\n",
300 lane,
301 voltage_names[this_v >> DP_TRAIN_VOLTAGE_SWING_SHIFT],
302 pre_emph_names[this_p >> DP_TRAIN_PRE_EMPHASIS_SHIFT]);
303
304 if (this_v > v)
305 v = this_v;
306 if (this_p > p)
307 p = this_p;
308 }
309
310 if (v >= DP_VOLTAGE_MAX)
311 v = DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED;
312
313 if (p >= dp_pre_emphasis_max(v))
314 p = dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
315
316 DRM_DEBUG_KMS("using signal parameters: voltage %s pre_emph %s\n",
317 voltage_names[(v & DP_TRAIN_VOLTAGE_SWING_MASK) >> DP_TRAIN_VOLTAGE_SWING_SHIFT],
318 pre_emph_names[(p & DP_TRAIN_PRE_EMPHASIS_MASK) >> DP_TRAIN_PRE_EMPHASIS_SHIFT]);
319
320 for (lane = 0; lane < 4; lane++)
321 train_set[lane] = v | p;
322}
323
324union aux_channel_transaction {
325 PROCESS_AUX_CHANNEL_TRANSACTION_PS_ALLOCATION v1;
326 PROCESS_AUX_CHANNEL_TRANSACTION_PARAMETERS_V2 v2;
327};
328
329
330bool radeon_process_aux_ch(struct radeon_i2c_chan *chan, u8 *req_bytes,
331 int num_bytes, u8 *read_byte,
332 u8 read_buf_len, u8 delay)
333{
334 struct drm_device *dev = chan->dev;
335 struct radeon_device *rdev = dev->dev_private;
336 union aux_channel_transaction args;
337 int index = GetIndexIntoMasterTable(COMMAND, ProcessAuxChannelTransaction);
338 unsigned char *base;
339 int retry_count = 0;
340
341 memset(&args, 0, sizeof(args));
342
343 base = (unsigned char *)rdev->mode_info.atom_context->scratch;
344
345retry:
346 memcpy(base, req_bytes, num_bytes);
347
348 args.v1.lpAuxRequest = 0;
349 args.v1.lpDataOut = 16;
350 args.v1.ucDataOutLen = 0;
351 args.v1.ucChannelID = chan->rec.i2c_id;
352 args.v1.ucDelay = delay / 10;
353 if (ASIC_IS_DCE4(rdev))
354 args.v2.ucHPD_ID = chan->rec.hpd;
355
356 atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
357
358 if (args.v1.ucReplyStatus && !args.v1.ucDataOutLen) {
359 if (args.v1.ucReplyStatus == 0x20 && retry_count++ < 10)
360 goto retry;
361 DRM_DEBUG_KMS("failed to get auxch %02x%02x %02x %02x 0x%02x %02x after %d retries\n",
362 req_bytes[1], req_bytes[0], req_bytes[2], req_bytes[3],
363 chan->rec.i2c_id, args.v1.ucReplyStatus, retry_count);
364 return false;
365 }
366
367 if (args.v1.ucDataOutLen && read_byte && read_buf_len) {
368 if (read_buf_len < args.v1.ucDataOutLen) {
369 DRM_ERROR("Buffer to small for return answer %d %d\n",
370 read_buf_len, args.v1.ucDataOutLen);
371 return false;
372 }
373 {
374 int len = min(read_buf_len, args.v1.ucDataOutLen);
375 memcpy(read_byte, base + 16, len);
376 }
377 }
378 return true;
379}
380
381bool radeon_dp_aux_native_write(struct radeon_connector *radeon_connector, uint16_t address,
382 uint8_t send_bytes, uint8_t *send)
383{
384 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
385 u8 msg[20];
386 u8 msg_len, dp_msg_len;
387 bool ret;
388
389 dp_msg_len = 4;
390 msg[0] = address;
391 msg[1] = address >> 8;
392 msg[2] = AUX_NATIVE_WRITE << 4;
393 dp_msg_len += send_bytes;
394 msg[3] = (dp_msg_len << 4) | (send_bytes - 1);
395
396 if (send_bytes > 16)
397 return false;
398
399 memcpy(&msg[4], send, send_bytes);
400 msg_len = 4 + send_bytes;
401 ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, msg, msg_len, NULL, 0, 0);
402 return ret;
403}
404
405bool radeon_dp_aux_native_read(struct radeon_connector *radeon_connector, uint16_t address,
406 uint8_t delay, uint8_t expected_bytes,
407 uint8_t *read_p)
408{
409 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
410 u8 msg[20];
411 u8 msg_len, dp_msg_len;
412 bool ret = false;
413 msg_len = 4;
414 dp_msg_len = 4;
415 msg[0] = address;
416 msg[1] = address >> 8;
417 msg[2] = AUX_NATIVE_READ << 4;
418 msg[3] = (dp_msg_len) << 4;
419 msg[3] |= expected_bytes - 1;
420
421 ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus, msg, msg_len, read_p, expected_bytes, delay);
422 return ret;
423}
424
425
426static u8 radeon_dp_encoder_service(struct radeon_device *rdev, int action, int dp_clock,
427 uint8_t ucconfig, uint8_t lane_num)
428{
429 DP_ENCODER_SERVICE_PARAMETERS args;
430 int index = GetIndexIntoMasterTable(COMMAND, DPEncoderService);
431
432 memset(&args, 0, sizeof(args));
433 args.ucLinkClock = dp_clock / 10;
434 args.ucConfig = ucconfig;
435 args.ucAction = action;
436 args.ucLaneNum = lane_num;
437 args.ucStatus = 0;
438
439 atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
440 return args.ucStatus;
441}
442
443u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector)
444{
445 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
446 struct drm_device *dev = radeon_connector->base.dev;
447 struct radeon_device *rdev = dev->dev_private;
448
449 return radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_GET_SINK_TYPE, 0,
450 dig_connector->dp_i2c_bus->rec.i2c_id, 0);
451}
452
453bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
454{
455 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
456 u8 msg[25];
457 int ret;
458
459 ret = radeon_dp_aux_native_read(radeon_connector, DP_DPCD_REV, 0, 8, msg);
460 if (ret) {
461 memcpy(dig_connector->dpcd, msg, 8);
462 {
463 int i;
464 DRM_DEBUG_KMS("DPCD: ");
465 for (i = 0; i < 8; i++)
466 DRM_DEBUG_KMS("%02x ", msg[i]);
467 DRM_DEBUG_KMS("\n");
468 }
469 return true;
470 }
471 dig_connector->dpcd[0] = 0;
472 return false;
473}
474
475void radeon_dp_set_link_config(struct drm_connector *connector,
476 struct drm_display_mode *mode)
477{
478 struct radeon_connector *radeon_connector;
479 struct radeon_connector_atom_dig *dig_connector;
480
481 if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) &&
482 (connector->connector_type != DRM_MODE_CONNECTOR_eDP))
483 return;
484
485 radeon_connector = to_radeon_connector(connector);
486 if (!radeon_connector->con_priv)
487 return;
488 dig_connector = radeon_connector->con_priv;
489
490 dig_connector->dp_clock =
491 dp_link_clock_for_mode_clock(dig_connector->dpcd, mode->clock);
492 dig_connector->dp_lane_count =
493 dp_lanes_for_mode_clock(dig_connector->dpcd, mode->clock);
494}
495
496int radeon_dp_mode_valid_helper(struct radeon_connector *radeon_connector,
497 struct drm_display_mode *mode)
498{
499 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
500
501 return dp_mode_valid(dig_connector->dpcd, mode->clock);
502}
503
504static bool atom_dp_get_link_status(struct radeon_connector *radeon_connector,
505 u8 link_status[DP_LINK_STATUS_SIZE])
506{
507 int ret;
508 ret = radeon_dp_aux_native_read(radeon_connector, DP_LANE0_1_STATUS, 100,
509 DP_LINK_STATUS_SIZE, link_status);
510 if (!ret) {
511 DRM_ERROR("displayport link status failed\n");
512 return false;
513 }
514
515 DRM_DEBUG_KMS("link status %02x %02x %02x %02x %02x %02x\n",
516 link_status[0], link_status[1], link_status[2],
517 link_status[3], link_status[4], link_status[5]);
518 return true;
519}
520
521bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector)
522{
523 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
524 u8 link_status[DP_LINK_STATUS_SIZE];
525
526 if (!atom_dp_get_link_status(radeon_connector, link_status))
527 return false;
528 if (dp_channel_eq_ok(link_status, dig_connector->dp_lane_count))
529 return false;
530 return true;
531}
532
533static void dp_set_power(struct radeon_connector *radeon_connector, u8 power_state)
534{
535 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
536
537 if (dig_connector->dpcd[0] >= 0x11) {
538 radeon_dp_aux_native_write(radeon_connector, DP_SET_POWER, 1,
539 &power_state);
540 }
541}
542
543static void dp_set_downspread(struct radeon_connector *radeon_connector, u8 downspread)
544{
545 radeon_dp_aux_native_write(radeon_connector, DP_DOWNSPREAD_CTRL, 1,
546 &downspread);
547}
548
549static void dp_set_link_bw_lanes(struct radeon_connector *radeon_connector,
550 u8 link_configuration[DP_LINK_CONFIGURATION_SIZE])
551{
552 radeon_dp_aux_native_write(radeon_connector, DP_LINK_BW_SET, 2,
553 link_configuration);
554}
555
556static void dp_update_dpvs_emph(struct radeon_connector *radeon_connector,
557 struct drm_encoder *encoder,
558 u8 train_set[4])
559{
560 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
561 int i;
562
563 for (i = 0; i < dig_connector->dp_lane_count; i++)
564 atombios_dig_transmitter_setup(encoder,
565 ATOM_TRANSMITTER_ACTION_SETUP_VSEMPH,
566 i, train_set[i]);
567
568 radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_LANE0_SET,
569 dig_connector->dp_lane_count, train_set);
570}
571
572static void dp_set_training(struct radeon_connector *radeon_connector,
573 u8 training)
574{
575 radeon_dp_aux_native_write(radeon_connector, DP_TRAINING_PATTERN_SET,
576 1, &training);
577}
578
579void dp_link_train(struct drm_encoder *encoder,
580 struct drm_connector *connector)
581{
582 struct drm_device *dev = encoder->dev;
583 struct radeon_device *rdev = dev->dev_private;
584 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
585 struct radeon_encoder_atom_dig *dig;
586 struct radeon_connector *radeon_connector;
587 struct radeon_connector_atom_dig *dig_connector;
588 int enc_id = 0;
589 bool clock_recovery, channel_eq;
590 u8 link_status[DP_LINK_STATUS_SIZE];
591 u8 link_configuration[DP_LINK_CONFIGURATION_SIZE];
592 u8 tries, voltage;
593 u8 train_set[4];
594 int i;
595
596 if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) &&
597 (connector->connector_type != DRM_MODE_CONNECTOR_eDP))
598 return;
599
600 if (!radeon_encoder->enc_priv)
601 return;
602 dig = radeon_encoder->enc_priv;
603
604 radeon_connector = to_radeon_connector(connector);
605 if (!radeon_connector->con_priv)
606 return;
607 dig_connector = radeon_connector->con_priv;
608
609 if (dig->dig_encoder)
610 enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER;
611 else
612 enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER;
613 if (dig->linkb)
614 enc_id |= ATOM_DP_CONFIG_LINK_B;
615 else
616 enc_id |= ATOM_DP_CONFIG_LINK_A;
617
618 memset(link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
619 if (dig_connector->dp_clock == 270000)
620 link_configuration[0] = DP_LINK_BW_2_7;
621 else
622 link_configuration[0] = DP_LINK_BW_1_62;
623 link_configuration[1] = dig_connector->dp_lane_count;
624 if (dig_connector->dpcd[0] >= 0x11)
625 link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
626
627
628 dp_set_power(radeon_connector, DP_SET_POWER_D0);
629
630 dp_set_training(radeon_connector, DP_TRAINING_PATTERN_DISABLE);
631
632 dp_set_link_bw_lanes(radeon_connector, link_configuration);
633
634 dp_set_downspread(radeon_connector, 0);
635 if (ASIC_IS_DCE4(rdev)) {
636
637 atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_START);
638
639 atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1);
640 } else {
641
642 radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_START,
643 dig_connector->dp_clock, enc_id, 0);
644
645 radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL,
646 dig_connector->dp_clock, enc_id, 0);
647 }
648
649
650 memset(train_set, 0, 4);
651 udelay(400);
652
653 dp_set_training(radeon_connector, DP_TRAINING_PATTERN_1);
654
655 dp_update_dpvs_emph(radeon_connector, encoder, train_set);
656
657
658 clock_recovery = false;
659 tries = 0;
660 voltage = 0xff;
661 for (;;) {
662 udelay(100);
663 if (!atom_dp_get_link_status(radeon_connector, link_status))
664 break;
665
666 if (dp_clock_recovery_ok(link_status, dig_connector->dp_lane_count)) {
667 clock_recovery = true;
668 break;
669 }
670
671 for (i = 0; i < dig_connector->dp_lane_count; i++) {
672 if ((train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
673 break;
674 }
675 if (i == dig_connector->dp_lane_count) {
676 DRM_ERROR("clock recovery reached max voltage\n");
677 break;
678 }
679
680 if ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
681 ++tries;
682 if (tries == 5) {
683 DRM_ERROR("clock recovery tried 5 times\n");
684 break;
685 }
686 } else
687 tries = 0;
688
689 voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
690
691
692 dp_get_adjust_train(link_status, dig_connector->dp_lane_count, train_set);
693 dp_update_dpvs_emph(radeon_connector, encoder, train_set);
694 }
695 if (!clock_recovery)
696 DRM_ERROR("clock recovery failed\n");
697 else
698 DRM_DEBUG_KMS("clock recovery at voltage %d pre-emphasis %d\n",
699 train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK,
700 (train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK) >>
701 DP_TRAIN_PRE_EMPHASIS_SHIFT);
702
703
704
705 dp_set_training(radeon_connector, DP_TRAINING_PATTERN_2);
706
707 if (ASIC_IS_DCE4(rdev))
708 atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2);
709 else
710 radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL,
711 dig_connector->dp_clock, enc_id, 1);
712
713
714 tries = 0;
715 channel_eq = false;
716 for (;;) {
717 udelay(400);
718 if (!atom_dp_get_link_status(radeon_connector, link_status))
719 break;
720
721 if (dp_channel_eq_ok(link_status, dig_connector->dp_lane_count)) {
722 channel_eq = true;
723 break;
724 }
725
726
727 if (tries > 5) {
728 DRM_ERROR("channel eq failed: 5 tries\n");
729 break;
730 }
731
732
733 dp_get_adjust_train(link_status, dig_connector->dp_lane_count, train_set);
734 dp_update_dpvs_emph(radeon_connector, encoder, train_set);
735
736 tries++;
737 }
738
739 if (!channel_eq)
740 DRM_ERROR("channel eq failed\n");
741 else
742 DRM_DEBUG_KMS("channel eq at voltage %d pre-emphasis %d\n",
743 train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK,
744 (train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK)
745 >> DP_TRAIN_PRE_EMPHASIS_SHIFT);
746
747
748 dp_set_training(radeon_connector, DP_TRAINING_PATTERN_DISABLE);
749
750
751 if (ASIC_IS_DCE4(rdev))
752 atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE);
753 else
754 radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_TRAINING_COMPLETE,
755 dig_connector->dp_clock, enc_id, 0);
756}
757
758int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
759 uint8_t write_byte, uint8_t *read_byte)
760{
761 struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
762 struct radeon_i2c_chan *auxch = (struct radeon_i2c_chan *)adapter;
763 int ret = 0;
764 uint16_t address = algo_data->address;
765 uint8_t msg[5];
766 uint8_t reply[2];
767 int msg_len, dp_msg_len;
768 int reply_bytes;
769
770
771 if (mode & MODE_I2C_READ)
772 msg[2] = AUX_I2C_READ << 4;
773 else
774 msg[2] = AUX_I2C_WRITE << 4;
775
776 if (!(mode & MODE_I2C_STOP))
777 msg[2] |= AUX_I2C_MOT << 4;
778
779 msg[0] = address;
780 msg[1] = address >> 8;
781
782 reply_bytes = 1;
783
784 msg_len = 4;
785 dp_msg_len = 3;
786 switch (mode) {
787 case MODE_I2C_WRITE:
788 msg[4] = write_byte;
789 msg_len++;
790 dp_msg_len += 2;
791 break;
792 case MODE_I2C_READ:
793 dp_msg_len += 1;
794 break;
795 default:
796 break;
797 }
798
799 msg[3] = (dp_msg_len) << 4;
800 ret = radeon_process_aux_ch(auxch, msg, msg_len, reply, reply_bytes, 0);
801
802 if (ret) {
803 if (read_byte)
804 *read_byte = reply[0];
805 return reply_bytes;
806 }
807 return -EREMOTEIO;
808}
809
810
