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_LINK_STATUS_SIZE 6
38 #define DP_DPCD_SIZE 8
40 static char *voltage_names
[] = {
41 "0.4V", "0.6V", "0.8V", "1.2V"
43 static char *pre_emph_names
[] = {
44 "0dB", "3.5dB", "6dB", "9.5dB"
47 /***** radeon AUX functions *****/
48 union aux_channel_transaction
{
49 PROCESS_AUX_CHANNEL_TRANSACTION_PS_ALLOCATION v1
;
50 PROCESS_AUX_CHANNEL_TRANSACTION_PARAMETERS_V2 v2
;
53 static int radeon_process_aux_ch(struct radeon_i2c_chan
*chan
,
54 u8
*send
, int send_bytes
,
55 u8
*recv
, int recv_size
,
58 struct drm_device
*dev
= chan
->dev
;
59 struct radeon_device
*rdev
= dev
->dev_private
;
60 union aux_channel_transaction args
;
61 int index
= GetIndexIntoMasterTable(COMMAND
, ProcessAuxChannelTransaction
);
65 memset(&args
, 0, sizeof(args
));
67 base
= (unsigned char *)(rdev
->mode_info
.atom_context
->scratch
+ 1);
69 memcpy(base
, send
, send_bytes
);
71 args
.v1
.lpAuxRequest
= 0 + 4;
72 args
.v1
.lpDataOut
= 16 + 4;
73 args
.v1
.ucDataOutLen
= 0;
74 args
.v1
.ucChannelID
= chan
->rec
.i2c_id
;
75 args
.v1
.ucDelay
= delay
/ 10;
76 if (ASIC_IS_DCE4(rdev
))
77 args
.v2
.ucHPD_ID
= chan
->rec
.hpd
;
79 atom_execute_table(rdev
->mode_info
.atom_context
, index
, (uint32_t *)&args
);
81 *ack
= args
.v1
.ucReplyStatus
;
84 if (args
.v1
.ucReplyStatus
== 1) {
85 DRM_DEBUG_KMS("dp_aux_ch timeout\n");
90 if (args
.v1
.ucReplyStatus
== 2) {
91 DRM_DEBUG_KMS("dp_aux_ch flags not zero\n");
96 if (args
.v1
.ucReplyStatus
== 3) {
97 DRM_DEBUG_KMS("dp_aux_ch error\n");
101 recv_bytes
= args
.v1
.ucDataOutLen
;
102 if (recv_bytes
> recv_size
)
103 recv_bytes
= recv_size
;
105 if (recv
&& recv_size
)
106 memcpy(recv
, base
+ 16, recv_bytes
);
111 static int radeon_dp_aux_native_write(struct radeon_connector
*radeon_connector
,
112 u16 address
, u8
*send
, u8 send_bytes
, u8 delay
)
114 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
117 int msg_bytes
= send_bytes
+ 4;
125 msg
[1] = address
>> 8;
126 msg
[2] = AUX_NATIVE_WRITE
<< 4;
127 msg
[3] = (msg_bytes
<< 4) | (send_bytes
- 1);
128 memcpy(&msg
[4], send
, send_bytes
);
130 for (retry
= 0; retry
< 4; retry
++) {
131 ret
= radeon_process_aux_ch(dig_connector
->dp_i2c_bus
,
132 msg
, msg_bytes
, NULL
, 0, delay
, &ack
);
137 if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_ACK
)
139 else if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_DEFER
)
148 static int radeon_dp_aux_native_read(struct radeon_connector
*radeon_connector
,
149 u16 address
, u8
*recv
, int recv_bytes
, u8 delay
)
151 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
159 msg
[1] = address
>> 8;
160 msg
[2] = AUX_NATIVE_READ
<< 4;
161 msg
[3] = (msg_bytes
<< 4) | (recv_bytes
- 1);
163 for (retry
= 0; retry
< 4; retry
++) {
164 ret
= radeon_process_aux_ch(dig_connector
->dp_i2c_bus
,
165 msg
, msg_bytes
, recv
, recv_bytes
, delay
, &ack
);
170 if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_ACK
)
172 else if ((ack
& AUX_NATIVE_REPLY_MASK
) == AUX_NATIVE_REPLY_DEFER
)
183 static void radeon_write_dpcd_reg(struct radeon_connector
*radeon_connector
,
186 radeon_dp_aux_native_write(radeon_connector
, reg
, &val
, 1, 0);
189 static u8
radeon_read_dpcd_reg(struct radeon_connector
*radeon_connector
,
194 radeon_dp_aux_native_read(radeon_connector
, reg
, &val
, 1, 0);
199 int radeon_dp_i2c_aux_ch(struct i2c_adapter
*adapter
, int mode
,
200 u8 write_byte
, u8
*read_byte
)
202 struct i2c_algo_dp_aux_data
*algo_data
= adapter
->algo_data
;
203 struct radeon_i2c_chan
*auxch
= (struct radeon_i2c_chan
*)adapter
;
204 u16 address
= algo_data
->address
;
213 /* Set up the command byte */
214 if (mode
& MODE_I2C_READ
)
215 msg
[2] = AUX_I2C_READ
<< 4;
217 msg
[2] = AUX_I2C_WRITE
<< 4;
219 if (!(mode
& MODE_I2C_STOP
))
220 msg
[2] |= AUX_I2C_MOT
<< 4;
223 msg
[1] = address
>> 8;
228 msg
[3] = msg_bytes
<< 4;
233 msg
[3] = msg_bytes
<< 4;
241 for (retry
= 0; retry
< 4; retry
++) {
242 ret
= radeon_process_aux_ch(auxch
,
243 msg
, msg_bytes
, reply
, reply_bytes
, 0, &ack
);
247 DRM_DEBUG_KMS("aux_ch failed %d\n", ret
);
251 switch (ack
& AUX_NATIVE_REPLY_MASK
) {
252 case AUX_NATIVE_REPLY_ACK
:
253 /* I2C-over-AUX Reply field is only valid
254 * when paired with AUX ACK.
257 case AUX_NATIVE_REPLY_NACK
:
258 DRM_DEBUG_KMS("aux_ch native nack\n");
260 case AUX_NATIVE_REPLY_DEFER
:
261 DRM_DEBUG_KMS("aux_ch native defer\n");
265 DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack
);
269 switch (ack
& AUX_I2C_REPLY_MASK
) {
270 case AUX_I2C_REPLY_ACK
:
271 if (mode
== MODE_I2C_READ
)
272 *read_byte
= reply
[0];
274 case AUX_I2C_REPLY_NACK
:
275 DRM_DEBUG_KMS("aux_i2c nack\n");
277 case AUX_I2C_REPLY_DEFER
:
278 DRM_DEBUG_KMS("aux_i2c defer\n");
282 DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack
);
287 DRM_DEBUG_KMS("aux i2c too many retries, giving up\n");
291 /***** general DP utility functions *****/
293 static u8
dp_link_status(u8 link_status
[DP_LINK_STATUS_SIZE
], int r
)
295 return link_status
[r
- DP_LANE0_1_STATUS
];
298 static u8
dp_get_lane_status(u8 link_status
[DP_LINK_STATUS_SIZE
],
301 int i
= DP_LANE0_1_STATUS
+ (lane
>> 1);
302 int s
= (lane
& 1) * 4;
303 u8 l
= dp_link_status(link_status
, i
);
304 return (l
>> s
) & 0xf;
307 static bool dp_clock_recovery_ok(u8 link_status
[DP_LINK_STATUS_SIZE
],
313 for (lane
= 0; lane
< lane_count
; lane
++) {
314 lane_status
= dp_get_lane_status(link_status
, lane
);
315 if ((lane_status
& DP_LANE_CR_DONE
) == 0)
321 static bool dp_channel_eq_ok(u8 link_status
[DP_LINK_STATUS_SIZE
],
328 lane_align
= dp_link_status(link_status
,
329 DP_LANE_ALIGN_STATUS_UPDATED
);
330 if ((lane_align
& DP_INTERLANE_ALIGN_DONE
) == 0)
332 for (lane
= 0; lane
< lane_count
; lane
++) {
333 lane_status
= dp_get_lane_status(link_status
, lane
);
334 if ((lane_status
& DP_CHANNEL_EQ_BITS
) != DP_CHANNEL_EQ_BITS
)
340 static u8
dp_get_adjust_request_voltage(u8 link_status
[DP_LINK_STATUS_SIZE
],
344 int i
= DP_ADJUST_REQUEST_LANE0_1
+ (lane
>> 1);
345 int s
= ((lane
& 1) ?
346 DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT
:
347 DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT
);
348 u8 l
= dp_link_status(link_status
, i
);
350 return ((l
>> s
) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT
;
353 static u8
dp_get_adjust_request_pre_emphasis(u8 link_status
[DP_LINK_STATUS_SIZE
],
356 int i
= DP_ADJUST_REQUEST_LANE0_1
+ (lane
>> 1);
357 int s
= ((lane
& 1) ?
358 DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT
:
359 DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT
);
360 u8 l
= dp_link_status(link_status
, i
);
362 return ((l
>> s
) & 0x3) << DP_TRAIN_PRE_EMPHASIS_SHIFT
;
365 #define DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_1200
366 #define DP_PRE_EMPHASIS_MAX DP_TRAIN_PRE_EMPHASIS_9_5
368 static void dp_get_adjust_train(u8 link_status
[DP_LINK_STATUS_SIZE
],
376 for (lane
= 0; lane
< lane_count
; lane
++) {
377 u8 this_v
= dp_get_adjust_request_voltage(link_status
, lane
);
378 u8 this_p
= dp_get_adjust_request_pre_emphasis(link_status
, lane
);
380 DRM_DEBUG_KMS("requested signal parameters: lane %d voltage %s pre_emph %s\n",
382 voltage_names
[this_v
>> DP_TRAIN_VOLTAGE_SWING_SHIFT
],
383 pre_emph_names
[this_p
>> DP_TRAIN_PRE_EMPHASIS_SHIFT
]);
391 if (v
>= DP_VOLTAGE_MAX
)
392 v
|= DP_TRAIN_MAX_SWING_REACHED
;
394 if (p
>= DP_PRE_EMPHASIS_MAX
)
395 p
|= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED
;
397 DRM_DEBUG_KMS("using signal parameters: voltage %s pre_emph %s\n",
398 voltage_names
[(v
& DP_TRAIN_VOLTAGE_SWING_MASK
) >> DP_TRAIN_VOLTAGE_SWING_SHIFT
],
399 pre_emph_names
[(p
& DP_TRAIN_PRE_EMPHASIS_MASK
) >> DP_TRAIN_PRE_EMPHASIS_SHIFT
]);
401 for (lane
= 0; lane
< 4; lane
++)
402 train_set
[lane
] = v
| p
;
405 /* convert bits per color to bits per pixel */
406 /* get bpc from the EDID */
407 static int convert_bpc_to_bpp(int bpc
)
415 /* get the max pix clock supported by the link rate and lane num */
416 static int dp_get_max_dp_pix_clock(int link_rate
,
420 return (link_rate
* lane_num
* 8) / bpp
;
423 static int dp_get_max_link_rate(u8 dpcd
[DP_DPCD_SIZE
])
425 switch (dpcd
[DP_MAX_LINK_RATE
]) {
426 case DP_LINK_BW_1_62
:
436 static u8
dp_get_max_lane_number(u8 dpcd
[DP_DPCD_SIZE
])
438 return dpcd
[DP_MAX_LANE_COUNT
] & DP_MAX_LANE_COUNT_MASK
;
441 static u8
dp_get_dp_link_rate_coded(int link_rate
)
446 return DP_LINK_BW_1_62
;
448 return DP_LINK_BW_2_7
;
450 return DP_LINK_BW_5_4
;
454 /***** radeon specific DP functions *****/
456 /* First get the min lane# when low rate is used according to pixel clock
457 * (prefer low rate), second check max lane# supported by DP panel,
458 * if the max lane# < low rate lane# then use max lane# instead.
460 static int radeon_dp_get_dp_lane_number(struct drm_connector
*connector
,
461 u8 dpcd
[DP_DPCD_SIZE
],
464 int bpp
= convert_bpc_to_bpp(radeon_get_monitor_bpc(connector
));
465 int max_link_rate
= dp_get_max_link_rate(dpcd
);
466 int max_lane_num
= dp_get_max_lane_number(dpcd
);
468 int max_dp_pix_clock
;
470 for (lane_num
= 1; lane_num
< max_lane_num
; lane_num
<<= 1) {
471 max_dp_pix_clock
= dp_get_max_dp_pix_clock(max_link_rate
, lane_num
, bpp
);
472 if (pix_clock
<= max_dp_pix_clock
)
479 static int radeon_dp_get_dp_link_clock(struct drm_connector
*connector
,
480 u8 dpcd
[DP_DPCD_SIZE
],
483 int bpp
= convert_bpc_to_bpp(radeon_get_monitor_bpc(connector
));
484 int lane_num
, max_pix_clock
;
486 if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector
) ==
487 ENCODER_OBJECT_ID_NUTMEG
)
490 lane_num
= radeon_dp_get_dp_lane_number(connector
, dpcd
, pix_clock
);
491 max_pix_clock
= dp_get_max_dp_pix_clock(162000, lane_num
, bpp
);
492 if (pix_clock
<= max_pix_clock
)
494 max_pix_clock
= dp_get_max_dp_pix_clock(270000, lane_num
, bpp
);
495 if (pix_clock
<= max_pix_clock
)
497 if (radeon_connector_is_dp12_capable(connector
)) {
498 max_pix_clock
= dp_get_max_dp_pix_clock(540000, lane_num
, bpp
);
499 if (pix_clock
<= max_pix_clock
)
503 return dp_get_max_link_rate(dpcd
);
506 static u8
radeon_dp_encoder_service(struct radeon_device
*rdev
,
507 int action
, int dp_clock
,
508 u8 ucconfig
, u8 lane_num
)
510 DP_ENCODER_SERVICE_PARAMETERS args
;
511 int index
= GetIndexIntoMasterTable(COMMAND
, DPEncoderService
);
513 memset(&args
, 0, sizeof(args
));
514 args
.ucLinkClock
= dp_clock
/ 10;
515 args
.ucConfig
= ucconfig
;
516 args
.ucAction
= action
;
517 args
.ucLaneNum
= lane_num
;
520 atom_execute_table(rdev
->mode_info
.atom_context
, index
, (uint32_t *)&args
);
521 return args
.ucStatus
;
524 u8
radeon_dp_getsinktype(struct radeon_connector
*radeon_connector
)
526 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
527 struct drm_device
*dev
= radeon_connector
->base
.dev
;
528 struct radeon_device
*rdev
= dev
->dev_private
;
530 return radeon_dp_encoder_service(rdev
, ATOM_DP_ACTION_GET_SINK_TYPE
, 0,
531 dig_connector
->dp_i2c_bus
->rec
.i2c_id
, 0);
534 static void radeon_dp_probe_oui(struct radeon_connector
*radeon_connector
)
536 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
539 if (!(dig_connector
->dpcd
[DP_DOWN_STREAM_PORT_COUNT
] & DP_OUI_SUPPORT
))
542 if (radeon_dp_aux_native_read(radeon_connector
, DP_SINK_OUI
, buf
, 3, 0))
543 DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
544 buf
[0], buf
[1], buf
[2]);
546 if (radeon_dp_aux_native_read(radeon_connector
, DP_BRANCH_OUI
, buf
, 3, 0))
547 DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
548 buf
[0], buf
[1], buf
[2]);
551 bool radeon_dp_getdpcd(struct radeon_connector
*radeon_connector
)
553 struct radeon_connector_atom_dig
*dig_connector
= radeon_connector
->con_priv
;
557 ret
= radeon_dp_aux_native_read(radeon_connector
, DP_DPCD_REV
, msg
, 8, 0);
559 memcpy(dig_connector
->dpcd
, msg
, 8);
560 DRM_DEBUG_KMS("DPCD: ");
561 for (i
= 0; i
< 8; i
++)
562 DRM_DEBUG_KMS("%02x ", msg
[i
]);
565 radeon_dp_probe_oui(radeon_connector
);
569 dig_connector
->dpcd
[0] = 0;
573 int radeon_dp_get_panel_mode(struct drm_encoder
*encoder
,
574 struct drm_connector
*connector
)
576 struct drm_device
*dev
= encoder
->dev
;
577 struct radeon_device
*rdev
= dev
->dev_private
;
578 struct radeon_connector
*radeon_connector
= to_radeon_connector(connector
);
579 int panel_mode
= DP_PANEL_MODE_EXTERNAL_DP_MODE
;
580 u16 dp_bridge
= radeon_connector_encoder_get_dp_bridge_encoder_id(connector
);
583 if (!ASIC_IS_DCE4(rdev
))
586 if (dp_bridge
!= ENCODER_OBJECT_ID_NONE
) {
587 /* DP bridge chips */
588 tmp
= radeon_read_dpcd_reg(radeon_connector
, DP_EDP_CONFIGURATION_CAP
);
590 panel_mode
= DP_PANEL_MODE_INTERNAL_DP2_MODE
;
591 else if ((dp_bridge
== ENCODER_OBJECT_ID_NUTMEG
) ||
592 (dp_bridge
== ENCODER_OBJECT_ID_TRAVIS
))
593 panel_mode
= DP_PANEL_MODE_INTERNAL_DP1_MODE
;
595 panel_mode
= DP_PANEL_MODE_EXTERNAL_DP_MODE
;
596 } else if (connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
) {
598 tmp
= radeon_read_dpcd_reg(radeon_connector
, DP_EDP_CONFIGURATION_CAP
);
600 panel_mode
= DP_PANEL_MODE_INTERNAL_DP2_MODE
;
606 void radeon_dp_set_link_config(struct drm_connector
*connector
,
607 const struct drm_display_mode
*mode
)
609 struct radeon_connector
*radeon_connector
= to_radeon_connector(connector
);
610 struct radeon_connector_atom_dig
*dig_connector
;
612 if (!radeon_connector
->con_priv
)
614 dig_connector
= radeon_connector
->con_priv
;
616 if ((dig_connector
->dp_sink_type
== CONNECTOR_OBJECT_ID_DISPLAYPORT
) ||
617 (dig_connector
->dp_sink_type
== CONNECTOR_OBJECT_ID_eDP
)) {
618 dig_connector
->dp_clock
=
619 radeon_dp_get_dp_link_clock(connector
, dig_connector
->dpcd
, mode
->clock
);
620 dig_connector
->dp_lane_count
=
621 radeon_dp_get_dp_lane_number(connector
, dig_connector
->dpcd
, mode
->clock
);
625 int radeon_dp_mode_valid_helper(struct drm_connector
*connector
,
626 struct drm_display_mode
*mode
)
628 struct radeon_connector
*radeon_connector
= to_radeon_connector(connector
);
629 struct radeon_connector_atom_dig
*dig_connector
;
632 if (!radeon_connector
->con_priv
)
633 return MODE_CLOCK_HIGH
;
634 dig_connector
= radeon_connector
->con_priv
;
637 radeon_dp_get_dp_link_clock(connector
, dig_connector
->dpcd
, mode
->clock
);
639 if ((dp_clock
== 540000) &&
640 (!radeon_connector_is_dp12_capable(connector
)))
641 return MODE_CLOCK_HIGH
;
646 static bool radeon_dp_get_link_status(struct radeon_connector
*radeon_connector
,
647 u8 link_status
[DP_LINK_STATUS_SIZE
])
650 ret
= radeon_dp_aux_native_read(radeon_connector
, DP_LANE0_1_STATUS
,
651 link_status
, DP_LINK_STATUS_SIZE
, 100);
656 DRM_DEBUG_KMS("link status %02x %02x %02x %02x %02x %02x\n",
657 link_status
[0], link_status
[1], link_status
[2],
658 link_status
[3], link_status
[4], link_status
[5]);
662 bool radeon_dp_needs_link_train(struct radeon_connector
*radeon_connector
)
664 u8 link_status
[DP_LINK_STATUS_SIZE
];
665 struct radeon_connector_atom_dig
*dig
= radeon_connector
->con_priv
;
667 if (!radeon_dp_get_link_status(radeon_connector
, link_status
))
669 if (dp_channel_eq_ok(link_status
, dig
->dp_lane_count
))
674 struct radeon_dp_link_train_info
{
675 struct radeon_device
*rdev
;
676 struct drm_encoder
*encoder
;
677 struct drm_connector
*connector
;
678 struct radeon_connector
*radeon_connector
;
686 u8 link_status
[DP_LINK_STATUS_SIZE
];
691 static void radeon_dp_update_vs_emph(struct radeon_dp_link_train_info
*dp_info
)
693 /* set the initial vs/emph on the source */
694 atombios_dig_transmitter_setup(dp_info
->encoder
,
695 ATOM_TRANSMITTER_ACTION_SETUP_VSEMPH
,
696 0, dp_info
->train_set
[0]); /* sets all lanes at once */
698 /* set the vs/emph on the sink */
699 radeon_dp_aux_native_write(dp_info
->radeon_connector
, DP_TRAINING_LANE0_SET
,
700 dp_info
->train_set
, dp_info
->dp_lane_count
, 0);
703 static void radeon_dp_set_tp(struct radeon_dp_link_train_info
*dp_info
, int tp
)
707 /* set training pattern on the source */
708 if (ASIC_IS_DCE4(dp_info
->rdev
) || !dp_info
->use_dpencoder
) {
710 case DP_TRAINING_PATTERN_1
:
711 rtp
= ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1
;
713 case DP_TRAINING_PATTERN_2
:
714 rtp
= ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN2
;
716 case DP_TRAINING_PATTERN_3
:
717 rtp
= ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN3
;
720 atombios_dig_encoder_setup(dp_info
->encoder
, rtp
, 0);
723 case DP_TRAINING_PATTERN_1
:
726 case DP_TRAINING_PATTERN_2
:
730 radeon_dp_encoder_service(dp_info
->rdev
, ATOM_DP_ACTION_TRAINING_PATTERN_SEL
,
731 dp_info
->dp_clock
, dp_info
->enc_id
, rtp
);
734 /* enable training pattern on the sink */
735 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_TRAINING_PATTERN_SET
, tp
);
738 static int radeon_dp_link_train_init(struct radeon_dp_link_train_info
*dp_info
)
740 struct radeon_encoder
*radeon_encoder
= to_radeon_encoder(dp_info
->encoder
);
741 struct radeon_encoder_atom_dig
*dig
= radeon_encoder
->enc_priv
;
744 /* power up the sink */
745 if (dp_info
->dpcd
[0] >= 0x11)
746 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
747 DP_SET_POWER
, DP_SET_POWER_D0
);
749 /* possibly enable downspread on the sink */
750 if (dp_info
->dpcd
[3] & 0x1)
751 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
752 DP_DOWNSPREAD_CTRL
, DP_SPREAD_AMP_0_5
);
754 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
755 DP_DOWNSPREAD_CTRL
, 0);
757 if ((dp_info
->connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
) &&
758 (dig
->panel_mode
== DP_PANEL_MODE_INTERNAL_DP2_MODE
)) {
759 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_EDP_CONFIGURATION_SET
, 1);
762 /* set the lane count on the sink */
763 tmp
= dp_info
->dp_lane_count
;
764 if (dp_info
->dpcd
[DP_DPCD_REV
] >= 0x11 &&
765 dp_info
->dpcd
[DP_MAX_LANE_COUNT
] & DP_ENHANCED_FRAME_CAP
)
766 tmp
|= DP_LANE_COUNT_ENHANCED_FRAME_EN
;
767 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_LANE_COUNT_SET
, tmp
);
769 /* set the link rate on the sink */
770 tmp
= dp_get_dp_link_rate_coded(dp_info
->dp_clock
);
771 radeon_write_dpcd_reg(dp_info
->radeon_connector
, DP_LINK_BW_SET
, tmp
);
773 /* start training on the source */
774 if (ASIC_IS_DCE4(dp_info
->rdev
) || !dp_info
->use_dpencoder
)
775 atombios_dig_encoder_setup(dp_info
->encoder
,
776 ATOM_ENCODER_CMD_DP_LINK_TRAINING_START
, 0);
778 radeon_dp_encoder_service(dp_info
->rdev
, ATOM_DP_ACTION_TRAINING_START
,
779 dp_info
->dp_clock
, dp_info
->enc_id
, 0);
781 /* disable the training pattern on the sink */
782 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
783 DP_TRAINING_PATTERN_SET
,
784 DP_TRAINING_PATTERN_DISABLE
);
789 static int radeon_dp_link_train_finish(struct radeon_dp_link_train_info
*dp_info
)
793 /* disable the training pattern on the sink */
794 radeon_write_dpcd_reg(dp_info
->radeon_connector
,
795 DP_TRAINING_PATTERN_SET
,
796 DP_TRAINING_PATTERN_DISABLE
);
798 /* disable the training pattern on the source */
799 if (ASIC_IS_DCE4(dp_info
->rdev
) || !dp_info
->use_dpencoder
)
800 atombios_dig_encoder_setup(dp_info
->encoder
,
801 ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE
, 0);
803 radeon_dp_encoder_service(dp_info
->rdev
, ATOM_DP_ACTION_TRAINING_COMPLETE
,
804 dp_info
->dp_clock
, dp_info
->enc_id
, 0);
809 static int radeon_dp_link_train_cr(struct radeon_dp_link_train_info
*dp_info
)
815 radeon_dp_set_tp(dp_info
, DP_TRAINING_PATTERN_1
);
816 memset(dp_info
->train_set
, 0, 4);
817 radeon_dp_update_vs_emph(dp_info
);
821 /* clock recovery loop */
822 clock_recovery
= false;
826 if (dp_info
->rd_interval
== 0)
829 mdelay(dp_info
->rd_interval
* 4);
831 if (!radeon_dp_get_link_status(dp_info
->radeon_connector
, dp_info
->link_status
)) {
832 DRM_ERROR("displayport link status failed\n");
836 if (dp_clock_recovery_ok(dp_info
->link_status
, dp_info
->dp_lane_count
)) {
837 clock_recovery
= true;
841 for (i
= 0; i
< dp_info
->dp_lane_count
; i
++) {
842 if ((dp_info
->train_set
[i
] & DP_TRAIN_MAX_SWING_REACHED
) == 0)
845 if (i
== dp_info
->dp_lane_count
) {
846 DRM_ERROR("clock recovery reached max voltage\n");
850 if ((dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
) == voltage
) {
852 if (dp_info
->tries
== 5) {
853 DRM_ERROR("clock recovery tried 5 times\n");
859 voltage
= dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
;
861 /* Compute new train_set as requested by sink */
862 dp_get_adjust_train(dp_info
->link_status
, dp_info
->dp_lane_count
, dp_info
->train_set
);
864 radeon_dp_update_vs_emph(dp_info
);
866 if (!clock_recovery
) {
867 DRM_ERROR("clock recovery failed\n");
870 DRM_DEBUG_KMS("clock recovery at voltage %d pre-emphasis %d\n",
871 dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
,
872 (dp_info
->train_set
[0] & DP_TRAIN_PRE_EMPHASIS_MASK
) >>
873 DP_TRAIN_PRE_EMPHASIS_SHIFT
);
878 static int radeon_dp_link_train_ce(struct radeon_dp_link_train_info
*dp_info
)
882 if (dp_info
->tp3_supported
)
883 radeon_dp_set_tp(dp_info
, DP_TRAINING_PATTERN_3
);
885 radeon_dp_set_tp(dp_info
, DP_TRAINING_PATTERN_2
);
887 /* channel equalization loop */
891 if (dp_info
->rd_interval
== 0)
894 mdelay(dp_info
->rd_interval
* 4);
896 if (!radeon_dp_get_link_status(dp_info
->radeon_connector
, dp_info
->link_status
)) {
897 DRM_ERROR("displayport link status failed\n");
901 if (dp_channel_eq_ok(dp_info
->link_status
, dp_info
->dp_lane_count
)) {
907 if (dp_info
->tries
> 5) {
908 DRM_ERROR("channel eq failed: 5 tries\n");
912 /* Compute new train_set as requested by sink */
913 dp_get_adjust_train(dp_info
->link_status
, dp_info
->dp_lane_count
, dp_info
->train_set
);
915 radeon_dp_update_vs_emph(dp_info
);
920 DRM_ERROR("channel eq failed\n");
923 DRM_DEBUG_KMS("channel eq at voltage %d pre-emphasis %d\n",
924 dp_info
->train_set
[0] & DP_TRAIN_VOLTAGE_SWING_MASK
,
925 (dp_info
->train_set
[0] & DP_TRAIN_PRE_EMPHASIS_MASK
)
926 >> DP_TRAIN_PRE_EMPHASIS_SHIFT
);
931 void radeon_dp_link_train(struct drm_encoder
*encoder
,
932 struct drm_connector
*connector
)
934 struct drm_device
*dev
= encoder
->dev
;
935 struct radeon_device
*rdev
= dev
->dev_private
;
936 struct radeon_encoder
*radeon_encoder
= to_radeon_encoder(encoder
);
937 struct radeon_encoder_atom_dig
*dig
;
938 struct radeon_connector
*radeon_connector
;
939 struct radeon_connector_atom_dig
*dig_connector
;
940 struct radeon_dp_link_train_info dp_info
;
944 if (!radeon_encoder
->enc_priv
)
946 dig
= radeon_encoder
->enc_priv
;
948 radeon_connector
= to_radeon_connector(connector
);
949 if (!radeon_connector
->con_priv
)
951 dig_connector
= radeon_connector
->con_priv
;
953 if ((dig_connector
->dp_sink_type
!= CONNECTOR_OBJECT_ID_DISPLAYPORT
) &&
954 (dig_connector
->dp_sink_type
!= CONNECTOR_OBJECT_ID_eDP
))
957 /* DPEncoderService newer than 1.1 can't program properly the
958 * training pattern. When facing such version use the
959 * DIGXEncoderControl (X== 1 | 2)
961 dp_info
.use_dpencoder
= true;
962 index
= GetIndexIntoMasterTable(COMMAND
, DPEncoderService
);
963 if (atom_parse_cmd_header(rdev
->mode_info
.atom_context
, index
, &frev
, &crev
)) {
965 dp_info
.use_dpencoder
= false;
970 if (dig
->dig_encoder
)
971 dp_info
.enc_id
|= ATOM_DP_CONFIG_DIG2_ENCODER
;
973 dp_info
.enc_id
|= ATOM_DP_CONFIG_DIG1_ENCODER
;
975 dp_info
.enc_id
|= ATOM_DP_CONFIG_LINK_B
;
977 dp_info
.enc_id
|= ATOM_DP_CONFIG_LINK_A
;
979 dp_info
.rd_interval
= radeon_read_dpcd_reg(radeon_connector
, DP_TRAINING_AUX_RD_INTERVAL
);
980 tmp
= radeon_read_dpcd_reg(radeon_connector
, DP_MAX_LANE_COUNT
);
981 if (ASIC_IS_DCE5(rdev
) && (tmp
& DP_TPS3_SUPPORTED
))
982 dp_info
.tp3_supported
= true;
984 dp_info
.tp3_supported
= false;
986 memcpy(dp_info
.dpcd
, dig_connector
->dpcd
, 8);
988 dp_info
.encoder
= encoder
;
989 dp_info
.connector
= connector
;
990 dp_info
.radeon_connector
= radeon_connector
;
991 dp_info
.dp_lane_count
= dig_connector
->dp_lane_count
;
992 dp_info
.dp_clock
= dig_connector
->dp_clock
;
994 if (radeon_dp_link_train_init(&dp_info
))
996 if (radeon_dp_link_train_cr(&dp_info
))
998 if (radeon_dp_link_train_ce(&dp_info
))
1001 if (radeon_dp_link_train_finish(&dp_info
))