2 * Copyright 2007-8 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
23 * Authors: Dave Airlie
28 #include <drm/radeon_drm.h>
32 #include "atom-bits.h"
33 #include <drm/drm_dp_helper.h>
35 /* move these to drm_dp_helper.c/h */
36 #define DP_LINK_CONFIGURATION_SIZE 9
37 #define DP_DPCD_SIZE DP_RECEIVER_CAP_SIZE
39 static char *voltage_names[] = {
40 "0.4V", "0.6V", "0.8V", "1.2V"
42 static char *pre_emph_names[] = {
43 "0dB", "3.5dB", "6dB", "9.5dB"
46 /***** radeon AUX functions *****/
48 /* Atom needs data in little endian format so swap as appropriate when copying
49 * data to or from atom. Note that atom operates on dw units.
51 * Use to_le=true when sending data to atom and provide at least
52 * ALIGN(num_bytes,4) bytes in the dst buffer.
54 * Use to_le=false when receiving data from atom and provide ALIGN(num_bytes,4)
55 * byes in the src buffer.
57 void radeon_atom_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le)
60 u32 src_tmp[5], dst_tmp[5];
62 u8 align_num_bytes = ALIGN(num_bytes, 4);
65 memcpy(src_tmp, src, num_bytes);
66 for (i = 0; i < align_num_bytes / 4; i++)
67 dst_tmp[i] = cpu_to_le32(src_tmp[i]);
68 memcpy(dst, dst_tmp, align_num_bytes);
70 memcpy(src_tmp, src, align_num_bytes);
71 for (i = 0; i < align_num_bytes / 4; i++)
72 dst_tmp[i] = le32_to_cpu(src_tmp[i]);
73 memcpy(dst, dst_tmp, num_bytes);
76 memcpy(dst, src, num_bytes);
80 union aux_channel_transaction {
81 PROCESS_AUX_CHANNEL_TRANSACTION_PS_ALLOCATION v1;
82 PROCESS_AUX_CHANNEL_TRANSACTION_PARAMETERS_V2 v2;
85 static int radeon_process_aux_ch(struct radeon_i2c_chan *chan,
86 u8 *send, int send_bytes,
87 u8 *recv, int recv_size,
90 struct drm_device *dev = chan->dev;
91 struct radeon_device *rdev = dev->dev_private;
92 union aux_channel_transaction args;
93 int index = GetIndexIntoMasterTable(COMMAND, ProcessAuxChannelTransaction);
98 memset(&args, 0, sizeof(args));
100 mutex_lock(&chan->mutex);
101 mutex_lock(&rdev->mode_info.atom_context->scratch_mutex);
103 base = (unsigned char *)(rdev->mode_info.atom_context->scratch + 1);
105 radeon_atom_copy_swap(base, send, send_bytes, true);
107 args.v1.lpAuxRequest = cpu_to_le16((u16)(0 + 4));
108 args.v1.lpDataOut = cpu_to_le16((u16)(16 + 4));
109 args.v1.ucDataOutLen = 0;
110 args.v1.ucChannelID = chan->rec.i2c_id;
111 args.v1.ucDelay = delay / 10;
112 if (ASIC_IS_DCE4(rdev))
113 args.v2.ucHPD_ID = chan->rec.hpd;
115 atom_execute_table_scratch_unlocked(rdev->mode_info.atom_context, index, (uint32_t *)&args);
117 *ack = args.v1.ucReplyStatus;
120 if (args.v1.ucReplyStatus == 1) {
121 DRM_DEBUG_KMS("dp_aux_ch timeout\n");
127 if (args.v1.ucReplyStatus == 2) {
128 DRM_DEBUG_KMS("dp_aux_ch flags not zero\n");
134 if (args.v1.ucReplyStatus == 3) {
135 DRM_DEBUG_KMS("dp_aux_ch error\n");
140 recv_bytes = args.v1.ucDataOutLen;
141 if (recv_bytes > recv_size)
142 recv_bytes = recv_size;
144 if (recv && recv_size)
145 radeon_atom_copy_swap(recv, base + 16, recv_bytes, false);
149 mutex_unlock(&rdev->mode_info.atom_context->scratch_mutex);
150 mutex_unlock(&chan->mutex);
155 #define BARE_ADDRESS_SIZE 3
156 #define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
159 radeon_dp_aux_transfer_atom(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
161 struct radeon_i2c_chan *chan =
162 container_of(aux, struct radeon_i2c_chan, aux);
168 if (WARN_ON(msg->size > 16))
171 tx_buf[0] = msg->address & 0xff;
172 tx_buf[1] = (msg->address >> 8) & 0xff;
173 tx_buf[2] = (msg->request << 4) |
174 ((msg->address >> 16) & 0xf);
175 tx_buf[3] = msg->size ? (msg->size - 1) : 0;
177 switch (msg->request & ~DP_AUX_I2C_MOT) {
178 case DP_AUX_NATIVE_WRITE:
179 case DP_AUX_I2C_WRITE:
180 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
181 /* The atom implementation only supports writes with a max payload of
182 * 12 bytes since it uses 4 bits for the total count (header + payload)
183 * in the parameter space. The atom interface supports 16 byte
184 * payloads for reads. The hw itself supports up to 16 bytes of payload.
186 if (WARN_ON_ONCE(msg->size > 12))
188 /* tx_size needs to be 4 even for bare address packets since the atom
189 * table needs the info in tx_buf[3].
191 tx_size = HEADER_SIZE + msg->size;
193 tx_buf[3] |= BARE_ADDRESS_SIZE << 4;
195 tx_buf[3] |= tx_size << 4;
196 memcpy(tx_buf + HEADER_SIZE, msg->buffer, msg->size);
197 ret = radeon_process_aux_ch(chan,
198 tx_buf, tx_size, NULL, 0, delay, &ack);
200 /* Return payload size. */
203 case DP_AUX_NATIVE_READ:
204 case DP_AUX_I2C_READ:
205 /* tx_size needs to be 4 even for bare address packets since the atom
206 * table needs the info in tx_buf[3].
208 tx_size = HEADER_SIZE;
210 tx_buf[3] |= BARE_ADDRESS_SIZE << 4;
212 tx_buf[3] |= tx_size << 4;
213 ret = radeon_process_aux_ch(chan,
214 tx_buf, tx_size, msg->buffer, msg->size, delay, &ack);
222 msg->reply = ack >> 4;
227 void radeon_dp_aux_init(struct radeon_connector *radeon_connector)
229 struct drm_device *dev = radeon_connector->base.dev;
230 struct radeon_device *rdev = dev->dev_private;
233 radeon_connector->ddc_bus->rec.hpd = radeon_connector->hpd.hpd;
234 radeon_connector->ddc_bus->aux.dev = radeon_connector->base.kdev;
235 radeon_connector->ddc_bus->aux.drm_dev = radeon_connector->base.dev;
236 if (ASIC_IS_DCE5(rdev)) {
238 radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_native;
240 radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_atom;
242 radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_atom;
245 ret = drm_dp_aux_register(&radeon_connector->ddc_bus->aux);
247 radeon_connector->ddc_bus->has_aux = true;
249 WARN(ret, "drm_dp_aux_register() failed with error %d\n", ret);
252 /***** general DP utility functions *****/
254 #define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_LEVEL_3
255 #define DP_PRE_EMPHASIS_MAX DP_TRAIN_PRE_EMPH_LEVEL_3
257 static void dp_get_adjust_train(const u8 link_status[DP_LINK_STATUS_SIZE],
265 for (lane = 0; lane < lane_count; lane++) {
266 u8 this_v = drm_dp_get_adjust_request_voltage(link_status, lane);
267 u8 this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane);
269 DRM_DEBUG_KMS("requested signal parameters: lane %d voltage %s pre_emph %s\n",
271 voltage_names[this_v >> DP_TRAIN_VOLTAGE_SWING_SHIFT],
272 pre_emph_names[this_p >> DP_TRAIN_PRE_EMPHASIS_SHIFT]);
280 if (v >= DP_VOLTAGE_MAX)
281 v |= DP_TRAIN_MAX_SWING_REACHED;
283 if (p >= DP_PRE_EMPHASIS_MAX)
284 p |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
286 DRM_DEBUG_KMS("using signal parameters: voltage %s pre_emph %s\n",
287 voltage_names[(v & DP_TRAIN_VOLTAGE_SWING_MASK) >> DP_TRAIN_VOLTAGE_SWING_SHIFT],
288 pre_emph_names[(p & DP_TRAIN_PRE_EMPHASIS_MASK) >> DP_TRAIN_PRE_EMPHASIS_SHIFT]);
290 for (lane = 0; lane < 4; lane++)
291 train_set[lane] = v | p;
294 /* convert bits per color to bits per pixel */
295 /* get bpc from the EDID */
296 static int convert_bpc_to_bpp(int bpc)
304 /***** radeon specific DP functions *****/
306 static int radeon_dp_get_dp_link_config(struct drm_connector *connector,
307 const u8 dpcd[DP_DPCD_SIZE],
309 unsigned *dp_lanes, unsigned *dp_rate)
311 int bpp = convert_bpc_to_bpp(radeon_get_monitor_bpc(connector));
312 static const unsigned link_rates[3] = { 162000, 270000, 540000 };
313 unsigned max_link_rate = drm_dp_max_link_rate(dpcd);
314 unsigned max_lane_num = drm_dp_max_lane_count(dpcd);
315 unsigned lane_num, i, max_pix_clock;
317 if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
318 ENCODER_OBJECT_ID_NUTMEG) {
319 for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
320 max_pix_clock = (lane_num * 270000 * 8) / bpp;
321 if (max_pix_clock >= pix_clock) {
322 *dp_lanes = lane_num;
328 for (i = 0; i < ARRAY_SIZE(link_rates) && link_rates[i] <= max_link_rate; i++) {
329 for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
330 max_pix_clock = (lane_num * link_rates[i] * 8) / bpp;
331 if (max_pix_clock >= pix_clock) {
332 *dp_lanes = lane_num;
333 *dp_rate = link_rates[i];
343 static u8 radeon_dp_encoder_service(struct radeon_device *rdev,
344 int action, int dp_clock,
345 u8 ucconfig, u8 lane_num)
347 DP_ENCODER_SERVICE_PARAMETERS args;
348 int index = GetIndexIntoMasterTable(COMMAND, DPEncoderService);
350 memset(&args, 0, sizeof(args));
351 args.ucLinkClock = dp_clock / 10;
352 args.ucConfig = ucconfig;
353 args.ucAction = action;
354 args.ucLaneNum = lane_num;
357 atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
358 return args.ucStatus;
361 u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector)
363 struct drm_device *dev = radeon_connector->base.dev;
364 struct radeon_device *rdev = dev->dev_private;
366 return radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_GET_SINK_TYPE, 0,
367 radeon_connector->ddc_bus->rec.i2c_id, 0);
370 static void radeon_dp_probe_oui(struct radeon_connector *radeon_connector)
372 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
375 if (!(dig_connector->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
378 if (drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_SINK_OUI, buf, 3) == 3)
379 DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
380 buf[0], buf[1], buf[2]);
382 if (drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_BRANCH_OUI, buf, 3) == 3)
383 DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
384 buf[0], buf[1], buf[2]);
387 bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
389 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
390 u8 msg[DP_DPCD_SIZE];
393 ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_DPCD_REV, msg,
395 if (ret == DP_DPCD_SIZE) {
396 memcpy(dig_connector->dpcd, msg, DP_DPCD_SIZE);
398 DRM_DEBUG_KMS("DPCD: %*ph\n", (int)sizeof(dig_connector->dpcd),
399 dig_connector->dpcd);
401 radeon_dp_probe_oui(radeon_connector);
406 dig_connector->dpcd[0] = 0;
410 int radeon_dp_get_panel_mode(struct drm_encoder *encoder,
411 struct drm_connector *connector)
413 struct drm_device *dev = encoder->dev;
414 struct radeon_device *rdev = dev->dev_private;
415 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
416 int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
417 u16 dp_bridge = radeon_connector_encoder_get_dp_bridge_encoder_id(connector);
420 if (!ASIC_IS_DCE4(rdev))
423 if (!radeon_connector->con_priv)
426 if (dp_bridge != ENCODER_OBJECT_ID_NONE) {
427 /* DP bridge chips */
428 if (drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux,
429 DP_EDP_CONFIGURATION_CAP, &tmp) == 1) {
431 panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
432 else if ((dp_bridge == ENCODER_OBJECT_ID_NUTMEG) ||
433 (dp_bridge == ENCODER_OBJECT_ID_TRAVIS))
434 panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
436 panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
438 } else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
440 if (drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux,
441 DP_EDP_CONFIGURATION_CAP, &tmp) == 1) {
443 panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
450 void radeon_dp_set_link_config(struct drm_connector *connector,
451 const struct drm_display_mode *mode)
453 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
454 struct radeon_connector_atom_dig *dig_connector;
457 if (!radeon_connector->con_priv)
459 dig_connector = radeon_connector->con_priv;
461 if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
462 (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP)) {
463 ret = radeon_dp_get_dp_link_config(connector, dig_connector->dpcd,
465 &dig_connector->dp_lane_count,
466 &dig_connector->dp_clock);
468 dig_connector->dp_clock = 0;
469 dig_connector->dp_lane_count = 0;
474 int radeon_dp_mode_valid_helper(struct drm_connector *connector,
475 struct drm_display_mode *mode)
477 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
478 struct radeon_connector_atom_dig *dig_connector;
479 unsigned dp_clock, dp_lanes;
482 if ((mode->clock > 340000) &&
483 (!radeon_connector_is_dp12_capable(connector)))
484 return MODE_CLOCK_HIGH;
486 if (!radeon_connector->con_priv)
487 return MODE_CLOCK_HIGH;
488 dig_connector = radeon_connector->con_priv;
490 ret = radeon_dp_get_dp_link_config(connector, dig_connector->dpcd,
495 return MODE_CLOCK_HIGH;
497 if ((dp_clock == 540000) &&
498 (!radeon_connector_is_dp12_capable(connector)))
499 return MODE_CLOCK_HIGH;
504 bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector)
506 u8 link_status[DP_LINK_STATUS_SIZE];
507 struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
509 if (drm_dp_dpcd_read_link_status(&radeon_connector->ddc_bus->aux, link_status)
512 if (drm_dp_channel_eq_ok(link_status, dig->dp_lane_count))
517 void radeon_dp_set_rx_power_state(struct drm_connector *connector,
520 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
521 struct radeon_connector_atom_dig *dig_connector;
523 if (!radeon_connector->con_priv)
526 dig_connector = radeon_connector->con_priv;
528 /* power up/down the sink */
529 if (dig_connector->dpcd[0] >= 0x11) {
530 drm_dp_dpcd_writeb(&radeon_connector->ddc_bus->aux,
531 DP_SET_POWER, power_state);
532 usleep_range(1000, 2000);
537 struct radeon_dp_link_train_info {
538 struct radeon_device *rdev;
539 struct drm_encoder *encoder;
540 struct drm_connector *connector;
545 u8 dpcd[DP_RECEIVER_CAP_SIZE];
547 u8 link_status[DP_LINK_STATUS_SIZE];
550 struct drm_dp_aux *aux;
553 static void radeon_dp_update_vs_emph(struct radeon_dp_link_train_info *dp_info)
555 /* set the initial vs/emph on the source */
556 atombios_dig_transmitter_setup(dp_info->encoder,
557 ATOM_TRANSMITTER_ACTION_SETUP_VSEMPH,
558 0, dp_info->train_set[0]); /* sets all lanes at once */
560 /* set the vs/emph on the sink */
561 drm_dp_dpcd_write(dp_info->aux, DP_TRAINING_LANE0_SET,
562 dp_info->train_set, dp_info->dp_lane_count);
565 static void radeon_dp_set_tp(struct radeon_dp_link_train_info *dp_info, int tp)
569 /* set training pattern on the source */
570 if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder) {
572 case DP_TRAINING_PATTERN_1:
573 rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1;
575 case DP_TRAINING_PATTERN_2:
576 rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2;
578 case DP_TRAINING_PATTERN_3:
579 rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN3;
582 atombios_dig_encoder_setup(dp_info->encoder, rtp, 0);
585 case DP_TRAINING_PATTERN_1:
588 case DP_TRAINING_PATTERN_2:
592 radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_PATTERN_SEL,
593 dp_info->dp_clock, dp_info->enc_id, rtp);
596 /* enable training pattern on the sink */
597 drm_dp_dpcd_writeb(dp_info->aux, DP_TRAINING_PATTERN_SET, tp);
600 static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info)
602 struct radeon_encoder *radeon_encoder = to_radeon_encoder(dp_info->encoder);
603 struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
606 /* power up the sink */
607 radeon_dp_set_rx_power_state(dp_info->connector, DP_SET_POWER_D0);
609 /* possibly enable downspread on the sink */
610 if (dp_info->dpcd[3] & 0x1)
611 drm_dp_dpcd_writeb(dp_info->aux,
612 DP_DOWNSPREAD_CTRL, DP_SPREAD_AMP_0_5);
614 drm_dp_dpcd_writeb(dp_info->aux,
615 DP_DOWNSPREAD_CTRL, 0);
617 if (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)
618 drm_dp_dpcd_writeb(dp_info->aux, DP_EDP_CONFIGURATION_SET, 1);
620 /* set the lane count on the sink */
621 tmp = dp_info->dp_lane_count;
622 if (drm_dp_enhanced_frame_cap(dp_info->dpcd))
623 tmp |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
624 drm_dp_dpcd_writeb(dp_info->aux, DP_LANE_COUNT_SET, tmp);
626 /* set the link rate on the sink */
627 tmp = drm_dp_link_rate_to_bw_code(dp_info->dp_clock);
628 drm_dp_dpcd_writeb(dp_info->aux, DP_LINK_BW_SET, tmp);
630 /* start training on the source */
631 if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
632 atombios_dig_encoder_setup(dp_info->encoder,
633 ATOM_ENCODER_CMD_DP_LINK_TRAINING_START, 0);
635 radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_START,
636 dp_info->dp_clock, dp_info->enc_id, 0);
638 /* disable the training pattern on the sink */
639 drm_dp_dpcd_writeb(dp_info->aux,
640 DP_TRAINING_PATTERN_SET,
641 DP_TRAINING_PATTERN_DISABLE);
646 static int radeon_dp_link_train_finish(struct radeon_dp_link_train_info *dp_info)
650 /* disable the training pattern on the sink */
651 drm_dp_dpcd_writeb(dp_info->aux,
652 DP_TRAINING_PATTERN_SET,
653 DP_TRAINING_PATTERN_DISABLE);
655 /* disable the training pattern on the source */
656 if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
657 atombios_dig_encoder_setup(dp_info->encoder,
658 ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE, 0);
660 radeon_dp_encoder_service(dp_info->rdev, ATOM_DP_ACTION_TRAINING_COMPLETE,
661 dp_info->dp_clock, dp_info->enc_id, 0);
666 static int radeon_dp_link_train_cr(struct radeon_dp_link_train_info *dp_info)
672 radeon_dp_set_tp(dp_info, DP_TRAINING_PATTERN_1);
673 memset(dp_info->train_set, 0, 4);
674 radeon_dp_update_vs_emph(dp_info);
678 /* clock recovery loop */
679 clock_recovery = false;
683 drm_dp_link_train_clock_recovery_delay(dp_info->aux, dp_info->dpcd);
685 if (drm_dp_dpcd_read_link_status(dp_info->aux,
686 dp_info->link_status) <= 0) {
687 DRM_ERROR("displayport link status failed\n");
691 if (drm_dp_clock_recovery_ok(dp_info->link_status, dp_info->dp_lane_count)) {
692 clock_recovery = true;
696 for (i = 0; i < dp_info->dp_lane_count; i++) {
697 if ((dp_info->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
700 if (i == dp_info->dp_lane_count) {
701 DRM_ERROR("clock recovery reached max voltage\n");
705 if ((dp_info->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
707 if (dp_info->tries == 5) {
708 DRM_ERROR("clock recovery tried 5 times\n");
714 voltage = dp_info->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
716 /* Compute new train_set as requested by sink */
717 dp_get_adjust_train(dp_info->link_status, dp_info->dp_lane_count, dp_info->train_set);
719 radeon_dp_update_vs_emph(dp_info);
721 if (!clock_recovery) {
722 DRM_ERROR("clock recovery failed\n");
725 DRM_DEBUG_KMS("clock recovery at voltage %d pre-emphasis %d\n",
726 dp_info->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK,
727 (dp_info->train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK) >>
728 DP_TRAIN_PRE_EMPHASIS_SHIFT);
733 static int radeon_dp_link_train_ce(struct radeon_dp_link_train_info *dp_info)
737 if (dp_info->tp3_supported)
738 radeon_dp_set_tp(dp_info, DP_TRAINING_PATTERN_3);
740 radeon_dp_set_tp(dp_info, DP_TRAINING_PATTERN_2);
742 /* channel equalization loop */
746 drm_dp_link_train_channel_eq_delay(dp_info->aux, dp_info->dpcd);
748 if (drm_dp_dpcd_read_link_status(dp_info->aux,
749 dp_info->link_status) <= 0) {
750 DRM_ERROR("displayport link status failed\n");
754 if (drm_dp_channel_eq_ok(dp_info->link_status, dp_info->dp_lane_count)) {
760 if (dp_info->tries > 5) {
761 DRM_ERROR("channel eq failed: 5 tries\n");
765 /* Compute new train_set as requested by sink */
766 dp_get_adjust_train(dp_info->link_status, dp_info->dp_lane_count, dp_info->train_set);
768 radeon_dp_update_vs_emph(dp_info);
773 DRM_ERROR("channel eq failed\n");
776 DRM_DEBUG_KMS("channel eq at voltage %d pre-emphasis %d\n",
777 dp_info->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK,
778 (dp_info->train_set[0] & DP_TRAIN_PRE_EMPHASIS_MASK)
779 >> DP_TRAIN_PRE_EMPHASIS_SHIFT);
784 void radeon_dp_link_train(struct drm_encoder *encoder,
785 struct drm_connector *connector)
787 struct drm_device *dev = encoder->dev;
788 struct radeon_device *rdev = dev->dev_private;
789 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
790 struct radeon_encoder_atom_dig *dig;
791 struct radeon_connector *radeon_connector;
792 struct radeon_connector_atom_dig *dig_connector;
793 struct radeon_dp_link_train_info dp_info;
797 if (!radeon_encoder->enc_priv)
799 dig = radeon_encoder->enc_priv;
801 radeon_connector = to_radeon_connector(connector);
802 if (!radeon_connector->con_priv)
804 dig_connector = radeon_connector->con_priv;
806 if ((dig_connector->dp_sink_type != CONNECTOR_OBJECT_ID_DISPLAYPORT) &&
807 (dig_connector->dp_sink_type != CONNECTOR_OBJECT_ID_eDP))
810 /* DPEncoderService newer than 1.1 can't program properly the
811 * training pattern. When facing such version use the
812 * DIGXEncoderControl (X== 1 | 2)
814 dp_info.use_dpencoder = true;
815 index = GetIndexIntoMasterTable(COMMAND, DPEncoderService);
816 if (atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev)) {
818 dp_info.use_dpencoder = false;
822 if (dig->dig_encoder)
823 dp_info.enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER;
825 dp_info.enc_id |= ATOM_DP_CONFIG_DIG1_ENCODER;
827 dp_info.enc_id |= ATOM_DP_CONFIG_LINK_B;
829 dp_info.enc_id |= ATOM_DP_CONFIG_LINK_A;
831 if (drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux, DP_MAX_LANE_COUNT, &tmp)
833 if (ASIC_IS_DCE5(rdev) && (tmp & DP_TPS3_SUPPORTED))
834 dp_info.tp3_supported = true;
836 dp_info.tp3_supported = false;
838 dp_info.tp3_supported = false;
841 memcpy(dp_info.dpcd, dig_connector->dpcd, DP_RECEIVER_CAP_SIZE);
843 dp_info.encoder = encoder;
844 dp_info.connector = connector;
845 dp_info.dp_lane_count = dig_connector->dp_lane_count;
846 dp_info.dp_clock = dig_connector->dp_clock;
847 dp_info.aux = &radeon_connector->ddc_bus->aux;
849 if (radeon_dp_link_train_init(&dp_info))
851 if (radeon_dp_link_train_cr(&dp_info))
853 if (radeon_dp_link_train_ce(&dp_info))
856 if (radeon_dp_link_train_finish(&dp_info))