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 *****/
47 union aux_channel_transaction
{
48 PROCESS_AUX_CHANNEL_TRANSACTION_PS_ALLOCATION v1
;
49 PROCESS_AUX_CHANNEL_TRANSACTION_PARAMETERS_V2 v2
;
52 static int radeon_process_aux_ch(struct radeon_i2c_chan
*chan
,
53 u8
*send
, int send_bytes
,
54 u8
*recv
, int recv_size
,
57 struct drm_device
*dev
= chan
->dev
;
58 struct radeon_device
*rdev
= dev
->dev_private
;
59 union aux_channel_transaction args
;
60 int index
= GetIndexIntoMasterTable(COMMAND
, ProcessAuxChannelTransaction
);
64 memset(&args
, 0, sizeof(args
));
66 base
= (unsigned char *)(rdev
->mode_info
.atom_context
->scratch
+ 1);
68 memcpy(base
, send
, send_bytes
);
70 args
.v1
.lpAuxRequest
= 0 + 4;
71 args
.v1
.lpDataOut
= 16 + 4;
72 args
.v1
.ucDataOutLen
= 0;
73 args
.v1
.ucChannelID
= chan
->rec
.i2c_id
;
74 args
.v1
.ucDelay
= delay
/ 10;
75 if (ASIC_IS_DCE4(rdev
))
76 args
.v2
.ucHPD_ID
= chan
->rec
.hpd
;
78 atom_execute_table(rdev
->mode_info
.atom_context
, index
, (uint32_t *)&args
);
80 *ack
= args
.v1
.ucReplyStatus
;
83 if (args
.v1
.ucReplyStatus
== 1) {
84 DRM_DEBUG_KMS("dp_aux_ch timeout\n");
89 if (args
.v1
.ucReplyStatus
== 2) {
90 DRM_DEBUG_KMS("dp_aux_ch flags not zero\n");
95 if (args
.v1
.ucReplyStatus
== 3) {
96 DRM_DEBUG_KMS("dp_aux_ch error\n");
100 recv_bytes
= args
.v1
.ucDataOutLen
;
101 if (recv_bytes
> recv_size
)
102 recv_bytes
= recv_size
;
104 if (recv
&& recv_size
)
105 memcpy(recv
, base
+ 16, recv_bytes
);
110 static int radeon_dp_aux_native_write(struct radeon_connector
*radeon_connector
,
111 u16 address
, u8
*send
, u8 send_bytes
, u8 delay
)
113 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
116 int msg_bytes
= send_bytes
+ 4;
124 msg
[1] = address
>> 8;
125 msg
[2] = AUX_NATIVE_WRITE
<< 4;
126 msg
[3] = (msg_bytes
<< 4) | (send_bytes
- 1);
127 memcpy(&msg
[4], send
, send_bytes
);
129 for (retry
= 0; retry
< 4; retry
++) {
130 ret
= radeon_process_aux_ch(dig_connector
->dp_i2c_bus
,
131 msg
, msg_bytes
, NULL
, 0, delay
, &ack
);
136 if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_ACK
)
138 else if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_DEFER
)
147 static int radeon_dp_aux_native_read(struct radeon_connector
*radeon_connector
,
148 u16 address
, u8
*recv
, int recv_bytes
, u8 delay
)
150 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
158 msg
[1] = address
>> 8;
159 msg
[2] = AUX_NATIVE_READ
<< 4;
160 msg
[3] = (msg_bytes
<< 4) | (recv_bytes
- 1);
162 for (retry
= 0; retry
< 4; retry
++) {
163 ret
= radeon_process_aux_ch(dig_connector
->dp_i2c_bus
,
164 msg
, msg_bytes
, recv
, recv_bytes
, delay
, &ack
);
169 if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_ACK
)
171 else if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_DEFER
)
182 static void radeon_write_dpcd_reg(struct radeon_connector
*radeon_connector
,
185 radeon_dp_aux_native_write(radeon_connector
, reg
, &val
, 1, 0);
188 static u8
radeon_read_dpcd_reg(struct radeon_connector
*radeon_connector
,
193 radeon_dp_aux_native_read(radeon_connector
, reg
, &val
, 1, 0);
198 int radeon_dp_i2c_aux_ch(struct i2c_adapter
*adapter
, int mode
,
199 u8 write_byte
, u8
*read_byte
)
201 struct i2c_algo_dp_aux_data
*algo_data
= adapter
->algo_data
;
202 struct radeon_i2c_chan
*auxch
= (struct radeon_i2c_chan
*)adapter
;
203 u16 address
= algo_data
->address
;
212 /* Set up the command byte */
213 if (mode
& MODE_I2C_READ
)
214 msg
[2] = AUX_I2C_READ
<< 4;
216 msg
[2] = AUX_I2C_WRITE
<< 4;
218 if (!(mode
& MODE_I2C_STOP
))
219 msg
[2] |= AUX_I2C_MOT
<< 4;
222 msg
[1] = address
>> 8;
227 msg
[3] = msg_bytes
<< 4;
232 msg
[3] = msg_bytes
<< 4;
240 for (retry
= 0; retry
< 4; retry
++) {
241 ret
= radeon_process_aux_ch(auxch
,
242 msg
, msg_bytes
, reply
, reply_bytes
, 0, &ack
);
246 DRM_DEBUG_KMS("aux_ch failed %d\n", ret
);
250 switch (ack
& AUX_NATIVE_REPLY_MASK
) {
251 case AUX_NATIVE_REPLY_ACK
:
252 /* I2C-over-AUX Reply field is only valid
253 * when paired with AUX ACK.
256 case AUX_NATIVE_REPLY_NACK
:
257 DRM_DEBUG_KMS("aux_ch native nack\n");
259 case AUX_NATIVE_REPLY_DEFER
:
260 DRM_DEBUG_KMS("aux_ch native defer\n");
264 DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack
);
268 switch (ack
& AUX_I2C_REPLY_MASK
) {
269 case AUX_I2C_REPLY_ACK
:
270 if (mode
== MODE_I2C_READ
)
271 *read_byte
= reply
[0];
273 case AUX_I2C_REPLY_NACK
:
274 DRM_DEBUG_KMS("aux_i2c nack\n");
276 case AUX_I2C_REPLY_DEFER
:
277 DRM_DEBUG_KMS("aux_i2c defer\n");
281 DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack
);
286 DRM_DEBUG_KMS("aux i2c too many retries, giving up\n");
290 /***** general DP utility functions *****/
292 #define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_1200
293 #define DP_PRE_EMPHASIS_MAX DP_TRAIN_PRE_EMPHASIS_9_5
295 static void dp_get_adjust_train(u8 link_status
[DP_LINK_STATUS_SIZE
],
303 for (lane
= 0; lane
< lane_count
; lane
++) {
304 u8 this_v
= drm_dp_get_adjust_request_voltage(link_status
, lane
);
305 u8 this_p
= drm_dp_get_adjust_request_pre_emphasis(link_status
, lane
);
307 DRM_DEBUG_KMS("requested signal parameters: lane %d voltage %s pre_emph %s\n",
309 voltage_names
[this_v
>> DP_TRAIN_VOLTAGE_SWING_SHIFT
],
310 pre_emph_names
[this_p
>> DP_TRAIN_PRE_EMPHASIS_SHIFT
]);
318 if (v
>= DP_VOLTAGE_MAX
)
319 v
|= DP_TRAIN_MAX_SWING_REACHED
;
321 if (p
>= DP_PRE_EMPHASIS_MAX
)
322 p
|= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED
;
324 DRM_DEBUG_KMS("using signal parameters: voltage %s pre_emph %s\n",
325 voltage_names
[(v
& DP_TRAIN_VOLTAGE_SWING_MASK
) >> DP_TRAIN_VOLTAGE_SWING_SHIFT
],
326 pre_emph_names
[(p
& DP_TRAIN_PRE_EMPHASIS_MASK
) >> DP_TRAIN_PRE_EMPHASIS_SHIFT
]);
328 for (lane
= 0; lane
< 4; lane
++)
329 train_set
[lane
] = v
| p
;
332 /* convert bits per color to bits per pixel */
333 /* get bpc from the EDID */
334 static int convert_bpc_to_bpp(int bpc
)
342 /* get the max pix clock supported by the link rate and lane num */
343 static int dp_get_max_dp_pix_clock(int link_rate
,
347 return (link_rate
* lane_num
* 8) / bpp
;
350 /***** radeon specific DP functions *****/
352 /* First get the min lane# when low rate is used according to pixel clock
353 * (prefer low rate), second check max lane# supported by DP panel,
354 * if the max lane# < low rate lane# then use max lane# instead.
356 static int radeon_dp_get_dp_lane_number(struct drm_connector
*connector
,
357 u8 dpcd
[DP_DPCD_SIZE
],
360 int bpp
= convert_bpc_to_bpp(radeon_get_monitor_bpc(connector
));
361 int max_link_rate
= drm_dp_max_link_rate(dpcd
);
362 int max_lane_num
= drm_dp_max_lane_count(dpcd
);
364 int max_dp_pix_clock
;
366 for (lane_num
= 1; lane_num
< max_lane_num
; lane_num
<<= 1) {
367 max_dp_pix_clock
= dp_get_max_dp_pix_clock(max_link_rate
, lane_num
, bpp
);
368 if (pix_clock
<= max_dp_pix_clock
)
375 static int radeon_dp_get_dp_link_clock(struct drm_connector
*connector
,
376 u8 dpcd
[DP_DPCD_SIZE
],
379 int bpp
= convert_bpc_to_bpp(radeon_get_monitor_bpc(connector
));
380 int lane_num
, max_pix_clock
;
382 if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector
) ==
383 ENCODER_OBJECT_ID_NUTMEG
)
386 lane_num
= radeon_dp_get_dp_lane_number(connector
, dpcd
, pix_clock
);
387 max_pix_clock
= dp_get_max_dp_pix_clock(162000, lane_num
, bpp
);
388 if (pix_clock
<= max_pix_clock
)
390 max_pix_clock
= dp_get_max_dp_pix_clock(270000, lane_num
, bpp
);
391 if (pix_clock
<= max_pix_clock
)
393 if (radeon_connector_is_dp12_capable(connector
)) {
394 max_pix_clock
= dp_get_max_dp_pix_clock(540000, lane_num
, bpp
);
395 if (pix_clock
<= max_pix_clock
)
399 return drm_dp_max_link_rate(dpcd
);
402 static u8
radeon_dp_encoder_service(struct radeon_device
*rdev
,
403 int action
, int dp_clock
,
404 u8 ucconfig
, u8 lane_num
)
406 DP_ENCODER_SERVICE_PARAMETERS args
;
407 int index
= GetIndexIntoMasterTable(COMMAND
, DPEncoderService
);
409 memset(&args
, 0, sizeof(args
));
410 args
.ucLinkClock
= dp_clock
/ 10;
411 args
.ucConfig
= ucconfig
;
412 args
.ucAction
= action
;
413 args
.ucLaneNum
= lane_num
;
416 atom_execute_table(rdev
->mode_info
.atom_context
, index
, (uint32_t *)&args
);
417 return args
.ucStatus
;
420 u8
radeon_dp_getsinktype(struct radeon_connector
*radeon_connector
)
422 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
423 struct drm_device
*dev
= radeon_connector
->base
.dev
;
424 struct radeon_device
*rdev
= dev
->dev_private
;
426 return radeon_dp_encoder_service(rdev
, ATOM_DP_ACTION_GET_SINK_TYPE
, 0,
427 dig_connector
->dp_i2c_bus
->rec
.i2c_id
, 0);
430 static void radeon_dp_probe_oui(struct radeon_connector
*radeon_connector
)
432 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
435 if (!(dig_connector
->dpcd
[DP_DOWN_STREAM_PORT_COUNT
] & DP_OUI_SUPPORT
))
438 if (radeon_dp_aux_native_read(radeon_connector
, DP_SINK_OUI
, buf
, 3, 0))
439 DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
440 buf
[0], buf
[1], buf
[2]);
442 if (radeon_dp_aux_native_read(radeon_connector
, DP_BRANCH_OUI
, buf
, 3, 0))
443 DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
444 buf
[0], buf
[1], buf
[2]);
447 bool radeon_dp_getdpcd(struct radeon_connector
*radeon_connector
)
449 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
450 u8 msg
[DP_DPCD_SIZE
];
453 ret
= radeon_dp_aux_native_read(radeon_connector
, DP_DPCD_REV
, msg
,
456 memcpy(dig_connector
->dpcd
, msg
, DP_DPCD_SIZE
);
457 DRM_DEBUG_KMS("DPCD: ");
458 for (i
= 0; i
< DP_DPCD_SIZE
; i
++)
459 DRM_DEBUG_KMS("%02x ", msg
[i
]);
462 radeon_dp_probe_oui(radeon_connector
);
466 dig_connector
->dpcd
[0] = 0;
470 int radeon_dp_get_panel_mode(struct drm_encoder
*encoder
,
471 struct drm_connector
*connector
)
473 struct drm_device
*dev
= encoder
->dev
;
474 struct radeon_device
*rdev
= dev
->dev_private
;
475 struct radeon_connector
*radeon_connector
= to_radeon_connector(connector
);
476 int panel_mode
= DP_PANEL_MODE_EXTERNAL_DP_MODE
;
477 u16 dp_bridge
= radeon_connector_encoder_get_dp_bridge_encoder_id(connector
);
480 if (!ASIC_IS_DCE4(rdev
))
483 if (dp_bridge
!= ENCODER_OBJECT_ID_NONE
) {
484 /* DP bridge chips */
485 tmp
= radeon_read_dpcd_reg(radeon_connector
, DP_EDP_CONFIGURATION_CAP
);
487 panel_mode
= DP_PANEL_MODE_INTERNAL_DP2_MODE
;
488 else if ((dp_bridge
== ENCODER_OBJECT_ID_NUTMEG
) ||
489 (dp_bridge
== ENCODER_OBJECT_ID_TRAVIS
))
490 panel_mode
= DP_PANEL_MODE_INTERNAL_DP1_MODE
;
492 panel_mode
= DP_PANEL_MODE_EXTERNAL_DP_MODE
;
493 } else if (connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
) {
495 tmp
= radeon_read_dpcd_reg(radeon_connector
, DP_EDP_CONFIGURATION_CAP
);
497 panel_mode
= DP_PANEL_MODE_INTERNAL_DP2_MODE
;
503 void radeon_dp_set_link_config(struct drm_connector
*connector
,
504 const struct drm_display_mode
*mode
)
506 struct radeon_connector
*radeon_connector
= to_radeon_connector(connector
);
507 struct radeon_connector_atom_dig
*dig_connector
;
509 if (!radeon_connector
->con_priv
)
511 dig_connector
= radeon_connector
->con_priv
;
513 if ((dig_connector
->dp_sink_type
== CONNECTOR_OBJECT_ID_DISPLAYPORT
) ||
514 (dig_connector
->dp_sink_type
== CONNECTOR_OBJECT_ID_eDP
)) {
515 dig_connector
->dp_clock
=
516 radeon_dp_get_dp_link_clock(connector
, dig_connector
->dpcd
, mode
->clock
);
517 dig_connector
->dp_lane_count
=
518 radeon_dp_get_dp_lane_number(connector
, dig_connector
->dpcd
, mode
->clock
);
522 int radeon_dp_mode_valid_helper(struct drm_connector
*connector
,
523 struct drm_display_mode
*mode
)
525 struct radeon_connector
*radeon_connector
= to_radeon_connector(connector
);
526 struct radeon_connector_atom_dig
*dig_connector
;
529 if (!radeon_connector
->con_priv
)
530 return MODE_CLOCK_HIGH
;
531 dig_connector
= radeon_connector
->con_priv
;
534 radeon_dp_get_dp_link_clock(connector
, dig_connector
->dpcd
, mode
->clock
);
536 if ((dp_clock
== 540000) &&
537 (!radeon_connector_is_dp12_capable(connector
)))
538 return MODE_CLOCK_HIGH
;
543 static bool radeon_dp_get_link_status(struct radeon_connector
*radeon_connector
,
544 u8 link_status
[DP_LINK_STATUS_SIZE
])
547 ret
= radeon_dp_aux_native_read(radeon_connector
, DP_LANE0_1_STATUS
,
548 link_status
, DP_LINK_STATUS_SIZE
, 100);
553 DRM_DEBUG_KMS("link status %*ph\n", 6, link_status
);
557 bool radeon_dp_needs_link_train(struct radeon_connector
*radeon_connector
)
559 u8 link_status
[DP_LINK_STATUS_SIZE
];
560 struct radeon_connector_atom_dig
*dig
= radeon_connector
->con_priv
;
562 if (!radeon_dp_get_link_status(radeon_connector
, link_status
))
564 if (drm_dp_channel_eq_ok(link_status
, dig
->dp_lane_count
))
569 struct radeon_dp_link_train_info
{
570 struct radeon_device
*rdev
;
571 struct drm_encoder
*encoder
;
572 struct drm_connector
*connector
;
573 struct radeon_connector
*radeon_connector
;
578 u8 dpcd
[DP_RECEIVER_CAP_SIZE
];
580 u8 link_status
[DP_LINK_STATUS_SIZE
];
585 static void radeon_dp_update_vs_emph(struct radeon_dp_link_train_info
*dp_info
)
587 /* set the initial vs/emph on the source */
588 atombios_dig_transmitter_setup(dp_info
->encoder
,
589 ATOM_TRANSMITTER_ACTION_SETUP_VSEMPH
,
590 0, dp_info
->train_set
[0]); /* sets all lanes at once */
592 /* set the vs/emph on the sink */
593 radeon_dp_aux_native_write(dp_info
->radeon_connector
, DP_TRAINING_LANE0_SET
,
594 dp_info
->train_set
, dp_info
->dp_lane_count
, 0);
597 static void radeon_dp_set_tp(struct radeon_dp_link_train_info
*dp_info
, int tp
)
601 /* set training pattern on the source */
602 if (ASIC_IS_DCE4(dp_info
->rdev
) || !dp_info
->use_dpencoder
) {
604 case DP_TRAINING_PATTERN_1
:
605 rtp
= ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1
;
607 case DP_TRAINING_PATTERN_2
:
608 rtp
= ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2
;
610 case DP_TRAINING_PATTERN_3
:
611 rtp
= ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN3
;
614 atombios_dig_encoder_setup(dp_info
->encoder
, rtp
, 0);
617 case DP_TRAINING_PATTERN_1
:
620 case DP_TRAINING_PATTERN_2
:
624 radeon_dp_encoder_service(dp_info
->rdev
, ATOM_DP_ACTION_TRAINING_PATTERN_SEL
,
625 dp_info
->dp_clock
, dp_info
->enc_id
, rtp
);
628 /* enable training pattern on the sink */
629 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_TRAINING_PATTERN_SET
, tp
);
632 static int radeon_dp_link_train_init(struct radeon_dp_link_train_info
*dp_info
)
634 struct radeon_encoder
*radeon_encoder
= to_radeon_encoder(dp_info
->encoder
);
635 struct radeon_encoder_atom_dig
*dig
= radeon_encoder
->enc_priv
;
638 /* power up the sink */
639 if (dp_info
->dpcd
[0] >= 0x11)
640 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
641 DP_SET_POWER
, DP_SET_POWER_D0
);
643 /* possibly enable downspread on the sink */
644 if (dp_info
->dpcd
[3] & 0x1)
645 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
646 DP_DOWNSPREAD_CTRL
, DP_SPREAD_AMP_0_5
);
648 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
649 DP_DOWNSPREAD_CTRL
, 0);
651 if ((dp_info
->connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
) &&
652 (dig
->panel_mode
== DP_PANEL_MODE_INTERNAL_DP2_MODE
)) {
653 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_EDP_CONFIGURATION_SET
, 1);
656 /* set the lane count on the sink */
657 tmp
= dp_info
->dp_lane_count
;
658 if (dp_info
->dpcd
[DP_DPCD_REV
] >= 0x11 &&
659 dp_info
->dpcd
[DP_MAX_LANE_COUNT
] & DP_ENHANCED_FRAME_CAP
)
660 tmp
|= DP_LANE_COUNT_ENHANCED_FRAME_EN
;
661 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_LANE_COUNT_SET
, tmp
);
663 /* set the link rate on the sink */
664 tmp
= drm_dp_link_rate_to_bw_code(dp_info
->dp_clock
);
665 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_LINK_BW_SET
, tmp
);
667 /* start training on the source */
668 if (ASIC_IS_DCE4(dp_info
->rdev
) || !dp_info
->use_dpencoder
)
669 atombios_dig_encoder_setup(dp_info
->encoder
,
670 ATOM_ENCODER_CMD_DP_LINK_TRAINING_START
, 0);
672 radeon_dp_encoder_service(dp_info
->rdev
, ATOM_DP_ACTION_TRAINING_START
,
673 dp_info
->dp_clock
, dp_info
->enc_id
, 0);
675 /* disable the training pattern on the sink */
676 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
677 DP_TRAINING_PATTERN_SET
,
678 DP_TRAINING_PATTERN_DISABLE
);
683 static int radeon_dp_link_train_finish(struct radeon_dp_link_train_info
*dp_info
)
687 /* disable the training pattern on the sink */
688 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
689 DP_TRAINING_PATTERN_SET
,
690 DP_TRAINING_PATTERN_DISABLE
);
692 /* disable the training pattern on the source */
693 if (ASIC_IS_DCE4(dp_info
->rdev
) || !dp_info
->use_dpencoder
)
694 atombios_dig_encoder_setup(dp_info
->encoder
,
695 ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE
, 0);
697 radeon_dp_encoder_service(dp_info
->rdev
, ATOM_DP_ACTION_TRAINING_COMPLETE
,
698 dp_info
->dp_clock
, dp_info
->enc_id
, 0);
703 static int radeon_dp_link_train_cr(struct radeon_dp_link_train_info
*dp_info
)
709 radeon_dp_set_tp(dp_info
, DP_TRAINING_PATTERN_1
);
710 memset(dp_info
->train_set
, 0, 4);
711 radeon_dp_update_vs_emph(dp_info
);
715 /* clock recovery loop */
716 clock_recovery
= false;
720 drm_dp_link_train_clock_recovery_delay(dp_info
->dpcd
);
722 if (!radeon_dp_get_link_status(dp_info
->radeon_connector
, dp_info
->link_status
)) {
723 DRM_ERROR("displayport link status failed\n");
727 if (drm_dp_clock_recovery_ok(dp_info
->link_status
, dp_info
->dp_lane_count
)) {
728 clock_recovery
= true;
732 for (i
= 0; i
< dp_info
->dp_lane_count
; i
++) {
733 if ((dp_info
->train_set
[i
] & DP_TRAIN_MAX_SWING_REACHED
) == 0)
736 if (i
== dp_info
->dp_lane_count
) {
737 DRM_ERROR("clock recovery reached max voltage\n");
741 if ((dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
) == voltage
) {
743 if (dp_info
->tries
== 5) {
744 DRM_ERROR("clock recovery tried 5 times\n");
750 voltage
= dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
;
752 /* Compute new train_set as requested by sink */
753 dp_get_adjust_train(dp_info
->link_status
, dp_info
->dp_lane_count
, dp_info
->train_set
);
755 radeon_dp_update_vs_emph(dp_info
);
757 if (!clock_recovery
) {
758 DRM_ERROR("clock recovery failed\n");
761 DRM_DEBUG_KMS("clock recovery at voltage %d pre-emphasis %d\n",
762 dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
,
763 (dp_info
->train_set
[0] & DP_TRAIN_PRE_EMPHASIS_MASK
) >>
764 DP_TRAIN_PRE_EMPHASIS_SHIFT
);
769 static int radeon_dp_link_train_ce(struct radeon_dp_link_train_info
*dp_info
)
773 if (dp_info
->tp3_supported
)
774 radeon_dp_set_tp(dp_info
, DP_TRAINING_PATTERN_3
);
776 radeon_dp_set_tp(dp_info
, DP_TRAINING_PATTERN_2
);
778 /* channel equalization loop */
782 drm_dp_link_train_channel_eq_delay(dp_info
->dpcd
);
784 if (!radeon_dp_get_link_status(dp_info
->radeon_connector
, dp_info
->link_status
)) {
785 DRM_ERROR("displayport link status failed\n");
789 if (drm_dp_channel_eq_ok(dp_info
->link_status
, dp_info
->dp_lane_count
)) {
795 if (dp_info
->tries
> 5) {
796 DRM_ERROR("channel eq failed: 5 tries\n");
800 /* Compute new train_set as requested by sink */
801 dp_get_adjust_train(dp_info
->link_status
, dp_info
->dp_lane_count
, dp_info
->train_set
);
803 radeon_dp_update_vs_emph(dp_info
);
808 DRM_ERROR("channel eq failed\n");
811 DRM_DEBUG_KMS("channel eq at voltage %d pre-emphasis %d\n",
812 dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
,
813 (dp_info
->train_set
[0] & DP_TRAIN_PRE_EMPHASIS_MASK
)
814 >> DP_TRAIN_PRE_EMPHASIS_SHIFT
);
819 void radeon_dp_link_train(struct drm_encoder
*encoder
,
820 struct drm_connector
*connector
)
822 struct drm_device
*dev
= encoder
->dev
;
823 struct radeon_device
*rdev
= dev
->dev_private
;
824 struct radeon_encoder
*radeon_encoder
= to_radeon_encoder(encoder
);
825 struct radeon_encoder_atom_dig
*dig
;
826 struct radeon_connector
*radeon_connector
;
827 struct radeon_connector_atom_dig
*dig_connector
;
828 struct radeon_dp_link_train_info dp_info
;
832 if (!radeon_encoder
->enc_priv
)
834 dig
= radeon_encoder
->enc_priv
;
836 radeon_connector
= to_radeon_connector(connector
);
837 if (!radeon_connector
->con_priv
)
839 dig_connector
= radeon_connector
->con_priv
;
841 if ((dig_connector
->dp_sink_type
!= CONNECTOR_OBJECT_ID_DISPLAYPORT
) &&
842 (dig_connector
->dp_sink_type
!= CONNECTOR_OBJECT_ID_eDP
))
845 /* DPEncoderService newer than 1.1 can't program properly the
846 * training pattern. When facing such version use the
847 * DIGXEncoderControl (X== 1 | 2)
849 dp_info
.use_dpencoder
= true;
850 index
= GetIndexIntoMasterTable(COMMAND
, DPEncoderService
);
851 if (atom_parse_cmd_header(rdev
->mode_info
.atom_context
, index
, &frev
, &crev
)) {
853 dp_info
.use_dpencoder
= false;
858 if (dig
->dig_encoder
)
859 dp_info
.enc_id
|= ATOM_DP_CONFIG_DIG2_ENCODER
;
861 dp_info
.enc_id
|= ATOM_DP_CONFIG_DIG1_ENCODER
;
863 dp_info
.enc_id
|= ATOM_DP_CONFIG_LINK_B
;
865 dp_info
.enc_id
|= ATOM_DP_CONFIG_LINK_A
;
867 tmp
= radeon_read_dpcd_reg(radeon_connector
, DP_MAX_LANE_COUNT
);
868 if (ASIC_IS_DCE5(rdev
) && (tmp
& DP_TPS3_SUPPORTED
))
869 dp_info
.tp3_supported
= true;
871 dp_info
.tp3_supported
= false;
873 memcpy(dp_info
.dpcd
, dig_connector
->dpcd
, DP_RECEIVER_CAP_SIZE
);
875 dp_info
.encoder
= encoder
;
876 dp_info
.connector
= connector
;
877 dp_info
.radeon_connector
= radeon_connector
;
878 dp_info
.dp_lane_count
= dig_connector
->dp_lane_count
;
879 dp_info
.dp_clock
= dig_connector
->dp_clock
;
881 if (radeon_dp_link_train_init(&dp_info
))
883 if (radeon_dp_link_train_cr(&dp_info
))
885 if (radeon_dp_link_train_ce(&dp_info
))
888 if (radeon_dp_link_train_finish(&dp_info
))