summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nouveau_connector.c
blob: f5add64c093f015d3da402543fd39b4d99b59e4c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
/*
 * Copyright (C) 2008 Maarten Maathuis.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include <acpi/button.h>

#include <linux/pm_runtime.h>
#include <linux/vga_switcheroo.h>

#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic.h>

#include "nouveau_reg.h"
#include "nouveau_drv.h"
#include "dispnv04/hw.h"
#include "nouveau_acpi.h"

#include "nouveau_display.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
#include "nouveau_crtc.h"

#include <nvif/class.h>
#include <nvif/cl0046.h>
#include <nvif/event.h>

struct drm_display_mode *
nouveau_conn_native_mode(struct drm_connector *connector)
{
	const struct drm_connector_helper_funcs *helper = connector->helper_private;
	struct nouveau_drm *drm = nouveau_drm(connector->dev);
	struct drm_device *dev = connector->dev;
	struct drm_display_mode *mode, *largest = NULL;
	int high_w = 0, high_h = 0, high_v = 0;

	list_for_each_entry(mode, &connector->probed_modes, head) {
		mode->vrefresh = drm_mode_vrefresh(mode);
		if (helper->mode_valid(connector, mode) != MODE_OK ||
		    (mode->flags & DRM_MODE_FLAG_INTERLACE))
			continue;

		/* Use preferred mode if there is one.. */
		if (mode->type & DRM_MODE_TYPE_PREFERRED) {
			NV_DEBUG(drm, "native mode from preferred\n");
			return drm_mode_duplicate(dev, mode);
		}

		/* Otherwise, take the resolution with the largest width, then
		 * height, then vertical refresh
		 */
		if (mode->hdisplay < high_w)
			continue;

		if (mode->hdisplay == high_w && mode->vdisplay < high_h)
			continue;

		if (mode->hdisplay == high_w && mode->vdisplay == high_h &&
		    mode->vrefresh < high_v)
			continue;

		high_w = mode->hdisplay;
		high_h = mode->vdisplay;
		high_v = mode->vrefresh;
		largest = mode;
	}

	NV_DEBUG(drm, "native mode from largest: %dx%d@%d\n",
		      high_w, high_h, high_v);
	return largest ? drm_mode_duplicate(dev, largest) : NULL;
}

int
nouveau_conn_atomic_get_property(struct drm_connector *connector,
				 const struct drm_connector_state *state,
				 struct drm_property *property, u64 *val)
{
	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
	struct nouveau_display *disp = nouveau_display(connector->dev);
	struct drm_device *dev = connector->dev;

	if (property == dev->mode_config.scaling_mode_property)
		*val = asyc->scaler.mode;
	else if (property == disp->underscan_property)
		*val = asyc->scaler.underscan.mode;
	else if (property == disp->underscan_hborder_property)
		*val = asyc->scaler.underscan.hborder;
	else if (property == disp->underscan_vborder_property)
		*val = asyc->scaler.underscan.vborder;
	else if (property == disp->dithering_mode)
		*val = asyc->dither.mode;
	else if (property == disp->dithering_depth)
		*val = asyc->dither.depth;
	else if (property == disp->vibrant_hue_property)
		*val = asyc->procamp.vibrant_hue;
	else if (property == disp->color_vibrance_property)
		*val = asyc->procamp.color_vibrance;
	else
		return -EINVAL;

	return 0;
}

int
nouveau_conn_atomic_set_property(struct drm_connector *connector,
				 struct drm_connector_state *state,
				 struct drm_property *property, u64 val)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
	struct nouveau_display *disp = nouveau_display(dev);

	if (property == dev->mode_config.scaling_mode_property) {
		switch (val) {
		case DRM_MODE_SCALE_NONE:
			/* We allow 'None' for EDID modes, even on a fixed
			 * panel (some exist with support for lower refresh
			 * rates, which people might want to use for power-
			 * saving purposes).
			 *
			 * Non-EDID modes will force the use of GPU scaling
			 * to the native mode regardless of this setting.
			 */
			switch (connector->connector_type) {
			case DRM_MODE_CONNECTOR_LVDS:
			case DRM_MODE_CONNECTOR_eDP:
				/* ... except prior to G80, where the code
				 * doesn't support such things.
				 */
				if (disp->disp.oclass < NV50_DISP)
					return -EINVAL;
				break;
			default:
				break;
			}
		case DRM_MODE_SCALE_FULLSCREEN:
		case DRM_MODE_SCALE_CENTER:
		case DRM_MODE_SCALE_ASPECT:
			break;
		default:
			return -EINVAL;
		}

		if (asyc->scaler.mode != val) {
			asyc->scaler.mode = val;
			asyc->set.scaler = true;
		}
	} else
	if (property == disp->underscan_property) {
		if (asyc->scaler.underscan.mode != val) {
			asyc->scaler.underscan.mode = val;
			asyc->set.scaler = true;
		}
	} else
	if (property == disp->underscan_hborder_property) {
		if (asyc->scaler.underscan.hborder != val) {
			asyc->scaler.underscan.hborder = val;
			asyc->set.scaler = true;
		}
	} else
	if (property == disp->underscan_vborder_property) {
		if (asyc->scaler.underscan.vborder != val) {
			asyc->scaler.underscan.vborder = val;
			asyc->set.scaler = true;
		}
	} else
	if (property == disp->dithering_mode) {
		if (asyc->dither.mode != val) {
			asyc->dither.mode = val;
			asyc->set.dither = true;
		}
	} else
	if (property == disp->dithering_depth) {
		if (asyc->dither.mode != val) {
			asyc->dither.depth = val;
			asyc->set.dither = true;
		}
	} else
	if (property == disp->vibrant_hue_property) {
		if (asyc->procamp.vibrant_hue != val) {
			asyc->procamp.vibrant_hue = val;
			asyc->set.procamp = true;
		}
	} else
	if (property == disp->color_vibrance_property) {
		if (asyc->procamp.color_vibrance != val) {
			asyc->procamp.color_vibrance = val;
			asyc->set.procamp = true;
		}
	} else {
		return -EINVAL;
	}

	return 0;
}

void
nouveau_conn_atomic_destroy_state(struct drm_connector *connector,
				  struct drm_connector_state *state)
{
	struct nouveau_conn_atom *asyc = nouveau_conn_atom(state);
	__drm_atomic_helper_connector_destroy_state(&asyc->state);
	kfree(asyc);
}

struct drm_connector_state *
nouveau_conn_atomic_duplicate_state(struct drm_connector *connector)
{
	struct nouveau_conn_atom *armc = nouveau_conn_atom(connector->state);
	struct nouveau_conn_atom *asyc;
	if (!(asyc = kmalloc(sizeof(*asyc), GFP_KERNEL)))
		return NULL;
	__drm_atomic_helper_connector_duplicate_state(connector, &asyc->state);
	asyc->dither = armc->dither;
	asyc->scaler = armc->scaler;
	asyc->procamp = armc->procamp;
	asyc->set.mask = 0;
	return &asyc->state;
}

void
nouveau_conn_reset(struct drm_connector *connector)
{
	struct nouveau_conn_atom *asyc;

	if (WARN_ON(!(asyc = kzalloc(sizeof(*asyc), GFP_KERNEL))))
		return;

	if (connector->state)
		__drm_atomic_helper_connector_destroy_state(connector->state);
	__drm_atomic_helper_connector_reset(connector, &asyc->state);
	asyc->dither.mode = DITHERING_MODE_AUTO;
	asyc->dither.depth = DITHERING_DEPTH_AUTO;
	asyc->scaler.mode = DRM_MODE_SCALE_NONE;
	asyc->scaler.underscan.mode = UNDERSCAN_OFF;
	asyc->procamp.color_vibrance = 150;
	asyc->procamp.vibrant_hue = 90;

	if (nouveau_display(connector->dev)->disp.oclass < NV50_DISP) {
		switch (connector->connector_type) {
		case DRM_MODE_CONNECTOR_LVDS:
			/* See note in nouveau_conn_atomic_set_property(). */
			asyc->scaler.mode = DRM_MODE_SCALE_FULLSCREEN;
			break;
		default:
			break;
		}
	}
}

void
nouveau_conn_attach_properties(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_conn_atom *armc = nouveau_conn_atom(connector->state);
	struct nouveau_display *disp = nouveau_display(dev);

	/* Init DVI-I specific properties. */
	if (connector->connector_type == DRM_MODE_CONNECTOR_DVII)
		drm_object_attach_property(&connector->base, dev->mode_config.
					   dvi_i_subconnector_property, 0);

	/* Add overscan compensation options to digital outputs. */
	if (disp->underscan_property &&
	    (connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
	     connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
	     connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
	     connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)) {
		drm_object_attach_property(&connector->base,
					   disp->underscan_property,
					   UNDERSCAN_OFF);
		drm_object_attach_property(&connector->base,
					   disp->underscan_hborder_property, 0);
		drm_object_attach_property(&connector->base,
					   disp->underscan_vborder_property, 0);
	}

	/* Add hue and saturation options. */
	if (disp->vibrant_hue_property)
		drm_object_attach_property(&connector->base,
					   disp->vibrant_hue_property,
					   armc->procamp.vibrant_hue);
	if (disp->color_vibrance_property)
		drm_object_attach_property(&connector->base,
					   disp->color_vibrance_property,
					   armc->procamp.color_vibrance);

	/* Scaling mode property. */
	switch (connector->connector_type) {
	case DRM_MODE_CONNECTOR_TV:
		break;
	case DRM_MODE_CONNECTOR_VGA:
		if (disp->disp.oclass < NV50_DISP)
			break; /* Can only scale on DFPs. */
		/* Fall-through. */
	default:
		drm_object_attach_property(&connector->base, dev->mode_config.
					   scaling_mode_property,
					   armc->scaler.mode);
		break;
	}

	/* Dithering properties. */
	switch (connector->connector_type) {
	case DRM_MODE_CONNECTOR_TV:
	case DRM_MODE_CONNECTOR_VGA:
		break;
	default:
		if (disp->dithering_mode) {
			drm_object_attach_property(&connector->base,
						   disp->dithering_mode,
						   armc->dither.mode);
		}
		if (disp->dithering_depth) {
			drm_object_attach_property(&connector->base,
						   disp->dithering_depth,
						   armc->dither.depth);
		}
		break;
	}
}

MODULE_PARM_DESC(tv_disable, "Disable TV-out detection");
int nouveau_tv_disable = 0;
module_param_named(tv_disable, nouveau_tv_disable, int, 0400);

MODULE_PARM_DESC(ignorelid, "Ignore ACPI lid status");
int nouveau_ignorelid = 0;
module_param_named(ignorelid, nouveau_ignorelid, int, 0400);

MODULE_PARM_DESC(duallink, "Allow dual-link TMDS (default: enabled)");
int nouveau_duallink = 1;
module_param_named(duallink, nouveau_duallink, int, 0400);

MODULE_PARM_DESC(hdmimhz, "Force a maximum HDMI pixel clock (in MHz)");
int nouveau_hdmimhz = 0;
module_param_named(hdmimhz, nouveau_hdmimhz, int, 0400);

struct nouveau_encoder *
find_encoder(struct drm_connector *connector, int type)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_encoder *nv_encoder;
	struct drm_encoder *enc;
	int i, id;

	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		id = connector->encoder_ids[i];
		if (!id)
			break;

		enc = drm_encoder_find(dev, id);
		if (!enc)
			continue;
		nv_encoder = nouveau_encoder(enc);

		if (type == DCB_OUTPUT_ANY ||
		    (nv_encoder->dcb && nv_encoder->dcb->type == type))
			return nv_encoder;
	}

	return NULL;
}

struct nouveau_connector *
nouveau_encoder_connector_get(struct nouveau_encoder *encoder)
{
	struct drm_device *dev = to_drm_encoder(encoder)->dev;
	struct drm_connector *drm_connector;

	list_for_each_entry(drm_connector, &dev->mode_config.connector_list, head) {
		if (drm_connector->encoder == to_drm_encoder(encoder))
			return nouveau_connector(drm_connector);
	}

	return NULL;
}

static void
nouveau_connector_destroy(struct drm_connector *connector)
{
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	nvif_notify_fini(&nv_connector->hpd);
	kfree(nv_connector->edid);
	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
	if (nv_connector->aux.transfer)
		drm_dp_aux_unregister(&nv_connector->aux);
	kfree(connector);
}

static struct nouveau_encoder *
nouveau_connector_ddc_detect(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nvkm_gpio *gpio = nvxx_gpio(&drm->client.device);
	struct nouveau_encoder *nv_encoder;
	struct drm_encoder *encoder;
	int i, panel = -ENODEV;

	/* eDP panels need powering on by us (if the VBIOS doesn't default it
	 * to on) before doing any AUX channel transactions.  LVDS panel power
	 * is handled by the SOR itself, and not required for LVDS DDC.
	 */
	if (nv_connector->type == DCB_CONNECTOR_eDP) {
		panel = nvkm_gpio_get(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff);
		if (panel == 0) {
			nvkm_gpio_set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, 1);
			msleep(300);
		}
	}

	for (i = 0; nv_encoder = NULL, i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		int id = connector->encoder_ids[i];
		if (id == 0)
			break;

		encoder = drm_encoder_find(dev, id);
		if (!encoder)
			continue;
		nv_encoder = nouveau_encoder(encoder);

		if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {
			int ret = nouveau_dp_detect(nv_encoder);
			if (ret == NOUVEAU_DP_MST)
				return NULL;
			if (ret == NOUVEAU_DP_SST)
				break;
		} else
		if ((vga_switcheroo_handler_flags() &
		     VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
		    nv_encoder->dcb->type == DCB_OUTPUT_LVDS &&
		    nv_encoder->i2c) {
			int ret;
			vga_switcheroo_lock_ddc(dev->pdev);
			ret = nvkm_probe_i2c(nv_encoder->i2c, 0x50);
			vga_switcheroo_unlock_ddc(dev->pdev);
			if (ret)
				break;
		} else
		if (nv_encoder->i2c) {
			if (nvkm_probe_i2c(nv_encoder->i2c, 0x50))
				break;
		}
	}

	/* eDP panel not detected, restore panel power GPIO to previous
	 * state to avoid confusing the SOR for other output types.
	 */
	if (!nv_encoder && panel == 0)
		nvkm_gpio_set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, panel);

	return nv_encoder;
}

static struct nouveau_encoder *
nouveau_connector_of_detect(struct drm_connector *connector)
{
#ifdef __powerpc__
	struct drm_device *dev = connector->dev;
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder;
	struct device_node *cn, *dn = pci_device_to_OF_node(dev->pdev);

	if (!dn ||
	    !((nv_encoder = find_encoder(connector, DCB_OUTPUT_TMDS)) ||
	      (nv_encoder = find_encoder(connector, DCB_OUTPUT_ANALOG))))
		return NULL;

	for_each_child_of_node(dn, cn) {
		const char *name = of_get_property(cn, "name", NULL);
		const void *edid = of_get_property(cn, "EDID", NULL);
		int idx = name ? name[strlen(name) - 1] - 'A' : 0;

		if (nv_encoder->dcb->i2c_index == idx && edid) {
			nv_connector->edid =
				kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
			of_node_put(cn);
			return nv_encoder;
		}
	}
#endif
	return NULL;
}

static void
nouveau_connector_set_encoder(struct drm_connector *connector,
			      struct nouveau_encoder *nv_encoder)
{
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_drm *drm = nouveau_drm(connector->dev);
	struct drm_device *dev = connector->dev;

	if (nv_connector->detected_encoder == nv_encoder)
		return;
	nv_connector->detected_encoder = nv_encoder;

	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
		connector->interlace_allowed = true;
		connector->doublescan_allowed = true;
	} else
	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS ||
	    nv_encoder->dcb->type == DCB_OUTPUT_TMDS) {
		connector->doublescan_allowed = false;
		connector->interlace_allowed = false;
	} else {
		connector->doublescan_allowed = true;
		if (drm->client.device.info.family == NV_DEVICE_INFO_V0_KELVIN ||
		    (drm->client.device.info.family == NV_DEVICE_INFO_V0_CELSIUS &&
		     (dev->pdev->device & 0x0ff0) != 0x0100 &&
		     (dev->pdev->device & 0x0ff0) != 0x0150))
			/* HW is broken */
			connector->interlace_allowed = false;
		else
			connector->interlace_allowed = true;
	}

	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
		drm_object_property_set_value(&connector->base,
			dev->mode_config.dvi_i_subconnector_property,
			nv_encoder->dcb->type == DCB_OUTPUT_TMDS ?
			DRM_MODE_SUBCONNECTOR_DVID :
			DRM_MODE_SUBCONNECTOR_DVIA);
	}
}

static enum drm_connector_status
nouveau_connector_detect(struct drm_connector *connector, bool force)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder = NULL;
	struct nouveau_encoder *nv_partner;
	struct i2c_adapter *i2c;
	int type;
	int ret;
	enum drm_connector_status conn_status = connector_status_disconnected;

	/* Cleanup the previous EDID block. */
	if (nv_connector->edid) {
		drm_mode_connector_update_edid_property(connector, NULL);
		kfree(nv_connector->edid);
		nv_connector->edid = NULL;
	}

	ret = pm_runtime_get_sync(connector->dev->dev);
	if (ret < 0 && ret != -EACCES)
		return conn_status;

	nv_encoder = nouveau_connector_ddc_detect(connector);
	if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) {
		if ((vga_switcheroo_handler_flags() &
		     VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
		    nv_connector->type == DCB_CONNECTOR_LVDS)
			nv_connector->edid = drm_get_edid_switcheroo(connector,
								     i2c);
		else
			nv_connector->edid = drm_get_edid(connector, i2c);

		drm_mode_connector_update_edid_property(connector,
							nv_connector->edid);
		if (!nv_connector->edid) {
			NV_ERROR(drm, "DDC responded, but no EDID for %s\n",
				 connector->name);
			goto detect_analog;
		}

		/* Override encoder type for DVI-I based on whether EDID
		 * says the display is digital or analog, both use the
		 * same i2c channel so the value returned from ddc_detect
		 * isn't necessarily correct.
		 */
		nv_partner = NULL;
		if (nv_encoder->dcb->type == DCB_OUTPUT_TMDS)
			nv_partner = find_encoder(connector, DCB_OUTPUT_ANALOG);
		if (nv_encoder->dcb->type == DCB_OUTPUT_ANALOG)
			nv_partner = find_encoder(connector, DCB_OUTPUT_TMDS);

		if (nv_partner && ((nv_encoder->dcb->type == DCB_OUTPUT_ANALOG &&
				    nv_partner->dcb->type == DCB_OUTPUT_TMDS) ||
				   (nv_encoder->dcb->type == DCB_OUTPUT_TMDS &&
				    nv_partner->dcb->type == DCB_OUTPUT_ANALOG))) {
			if (nv_connector->edid->input & DRM_EDID_INPUT_DIGITAL)
				type = DCB_OUTPUT_TMDS;
			else
				type = DCB_OUTPUT_ANALOG;

			nv_encoder = find_encoder(connector, type);
		}

		nouveau_connector_set_encoder(connector, nv_encoder);
		conn_status = connector_status_connected;
		goto out;
	}

	nv_encoder = nouveau_connector_of_detect(connector);
	if (nv_encoder) {
		nouveau_connector_set_encoder(connector, nv_encoder);
		conn_status = connector_status_connected;
		goto out;
	}

detect_analog:
	nv_encoder = find_encoder(connector, DCB_OUTPUT_ANALOG);
	if (!nv_encoder && !nouveau_tv_disable)
		nv_encoder = find_encoder(connector, DCB_OUTPUT_TV);
	if (nv_encoder && force) {
		struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
		const struct drm_encoder_helper_funcs *helper =
						encoder->helper_private;

		if (helper->detect(encoder, connector) ==
						connector_status_connected) {
			nouveau_connector_set_encoder(connector, nv_encoder);
			conn_status = connector_status_connected;
			goto out;
		}

	}

 out:

	pm_runtime_mark_last_busy(connector->dev->dev);
	pm_runtime_put_autosuspend(connector->dev->dev);

	return conn_status;
}

static enum drm_connector_status
nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder = NULL;
	enum drm_connector_status status = connector_status_disconnected;

	/* Cleanup the previous EDID block. */
	if (nv_connector->edid) {
		drm_mode_connector_update_edid_property(connector, NULL);
		kfree(nv_connector->edid);
		nv_connector->edid = NULL;
	}

	nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
	if (!nv_encoder)
		return connector_status_disconnected;

	/* Try retrieving EDID via DDC */
	if (!drm->vbios.fp_no_ddc) {
		status = nouveau_connector_detect(connector, force);
		if (status == connector_status_connected)
			goto out;
	}

	/* On some laptops (Sony, i'm looking at you) there appears to
	 * be no direct way of accessing the panel's EDID.  The only
	 * option available to us appears to be to ask ACPI for help..
	 *
	 * It's important this check's before trying straps, one of the
	 * said manufacturer's laptops are configured in such a way
	 * the nouveau decides an entry in the VBIOS FP mode table is
	 * valid - it's not (rh#613284)
	 */
	if (nv_encoder->dcb->lvdsconf.use_acpi_for_edid) {
		if ((nv_connector->edid = nouveau_acpi_edid(dev, connector))) {
			status = connector_status_connected;
			goto out;
		}
	}

	/* If no EDID found above, and the VBIOS indicates a hardcoded
	 * modeline is avalilable for the panel, set it as the panel's
	 * native mode and exit.
	 */
	if (nouveau_bios_fp_mode(dev, NULL) && (drm->vbios.fp_no_ddc ||
	    nv_encoder->dcb->lvdsconf.use_straps_for_mode)) {
		status = connector_status_connected;
		goto out;
	}

	/* Still nothing, some VBIOS images have a hardcoded EDID block
	 * stored for the panel stored in them.
	 */
	if (!drm->vbios.fp_no_ddc) {
		struct edid *edid =
			(struct edid *)nouveau_bios_embedded_edid(dev);
		if (edid) {
			nv_connector->edid =
					kmemdup(edid, EDID_LENGTH, GFP_KERNEL);
			if (nv_connector->edid)
				status = connector_status_connected;
		}
	}

out:
#if defined(CONFIG_ACPI_BUTTON) || \
	(defined(CONFIG_ACPI_BUTTON_MODULE) && defined(MODULE))
	if (status == connector_status_connected &&
	    !nouveau_ignorelid && !acpi_lid_open())
		status = connector_status_unknown;
#endif

	drm_mode_connector_update_edid_property(connector, nv_connector->edid);
	nouveau_connector_set_encoder(connector, nv_encoder);
	return status;
}

static void
nouveau_connector_force(struct drm_connector *connector)
{
	struct nouveau_drm *drm = nouveau_drm(connector->dev);
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder;
	int type;

	if (nv_connector->type == DCB_CONNECTOR_DVI_I) {
		if (connector->force == DRM_FORCE_ON_DIGITAL)
			type = DCB_OUTPUT_TMDS;
		else
			type = DCB_OUTPUT_ANALOG;
	} else
		type = DCB_OUTPUT_ANY;

	nv_encoder = find_encoder(connector, type);
	if (!nv_encoder) {
		NV_ERROR(drm, "can't find encoder to force %s on!\n",
			 connector->name);
		connector->status = connector_status_disconnected;
		return;
	}

	nouveau_connector_set_encoder(connector, nv_encoder);
}

static int
nouveau_connector_set_property(struct drm_connector *connector,
			       struct drm_property *property, uint64_t value)
{
	struct nouveau_conn_atom *asyc = nouveau_conn_atom(connector->state);
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
	int ret;

	if (drm_drv_uses_atomic_modeset(connector->dev))
		return drm_atomic_helper_connector_set_property(connector, property, value);

	ret = connector->funcs->atomic_set_property(&nv_connector->base,
						    &asyc->state,
						    property, value);
	if (ret) {
		if (nv_encoder && nv_encoder->dcb->type == DCB_OUTPUT_TV)
			return get_slave_funcs(encoder)->set_property(
				encoder, connector, property, value);
		return ret;
	}

	nv_connector->scaling_mode = asyc->scaler.mode;
	nv_connector->dithering_mode = asyc->dither.mode;

	if (connector->encoder && connector->encoder->crtc) {
		ret = drm_crtc_helper_set_mode(connector->encoder->crtc,
					      &connector->encoder->crtc->mode,
					       connector->encoder->crtc->x,
					       connector->encoder->crtc->y,
					       NULL);
		if (!ret)
			return -EINVAL;
	}

	return 0;
}

struct moderec {
	int hdisplay;
	int vdisplay;
};

static struct moderec scaler_modes[] = {
	{ 1920, 1200 },
	{ 1920, 1080 },
	{ 1680, 1050 },
	{ 1600, 1200 },
	{ 1400, 1050 },
	{ 1280, 1024 },
	{ 1280, 960 },
	{ 1152, 864 },
	{ 1024, 768 },
	{ 800, 600 },
	{ 720, 400 },
	{ 640, 480 },
	{ 640, 400 },
	{ 640, 350 },
	{}
};

static int
nouveau_connector_scaler_modes_add(struct drm_connector *connector)
{
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct drm_display_mode *native = nv_connector->native_mode, *m;
	struct drm_device *dev = connector->dev;
	struct moderec *mode = &scaler_modes[0];
	int modes = 0;

	if (!native)
		return 0;

	while (mode->hdisplay) {
		if (mode->hdisplay <= native->hdisplay &&
		    mode->vdisplay <= native->vdisplay &&
		    (mode->hdisplay != native->hdisplay ||
		     mode->vdisplay != native->vdisplay)) {
			m = drm_cvt_mode(dev, mode->hdisplay, mode->vdisplay,
					 drm_mode_vrefresh(native), false,
					 false, false);
			if (!m)
				continue;

			drm_mode_probed_add(connector, m);
			modes++;
		}

		mode++;
	}

	return modes;
}

static void
nouveau_connector_detect_depth(struct drm_connector *connector)
{
	struct nouveau_drm *drm = nouveau_drm(connector->dev);
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
	struct nvbios *bios = &drm->vbios;
	struct drm_display_mode *mode = nv_connector->native_mode;
	bool duallink;

	/* if the edid is feeling nice enough to provide this info, use it */
	if (nv_connector->edid && connector->display_info.bpc)
		return;

	/* EDID 1.4 is *supposed* to be supported on eDP, but, Apple... */
	if (nv_connector->type == DCB_CONNECTOR_eDP) {
		connector->display_info.bpc = 6;
		return;
	}

	/* we're out of options unless we're LVDS, default to 8bpc */
	if (nv_encoder->dcb->type != DCB_OUTPUT_LVDS) {
		connector->display_info.bpc = 8;
		return;
	}

	connector->display_info.bpc = 6;

	/* LVDS: panel straps */
	if (bios->fp_no_ddc) {
		if (bios->fp.if_is_24bit)
			connector->display_info.bpc = 8;
		return;
	}

	/* LVDS: DDC panel, need to first determine the number of links to
	 * know which if_is_24bit flag to check...
	 */
	if (nv_connector->edid &&
	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG)
		duallink = ((u8 *)nv_connector->edid)[121] == 2;
	else
		duallink = mode->clock >= bios->fp.duallink_transition_clk;

	if ((!duallink && (bios->fp.strapless_is_24bit & 1)) ||
	    ( duallink && (bios->fp.strapless_is_24bit & 2)))
		connector->display_info.bpc = 8;
}

static int
nouveau_connector_get_modes(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
	int ret = 0;

	/* destroy the native mode, the attached monitor could have changed.
	 */
	if (nv_connector->native_mode) {
		drm_mode_destroy(dev, nv_connector->native_mode);
		nv_connector->native_mode = NULL;
	}

	if (nv_connector->edid)
		ret = drm_add_edid_modes(connector, nv_connector->edid);
	else
	if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS &&
	    (nv_encoder->dcb->lvdsconf.use_straps_for_mode ||
	     drm->vbios.fp_no_ddc) && nouveau_bios_fp_mode(dev, NULL)) {
		struct drm_display_mode mode;

		nouveau_bios_fp_mode(dev, &mode);
		nv_connector->native_mode = drm_mode_duplicate(dev, &mode);
	}

	/* Determine display colour depth for everything except LVDS now,
	 * DP requires this before mode_valid() is called.
	 */
	if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS)
		nouveau_connector_detect_depth(connector);

	/* Find the native mode if this is a digital panel, if we didn't
	 * find any modes through DDC previously add the native mode to
	 * the list of modes.
	 */
	if (!nv_connector->native_mode)
		nv_connector->native_mode = nouveau_conn_native_mode(connector);
	if (ret == 0 && nv_connector->native_mode) {
		struct drm_display_mode *mode;

		mode = drm_mode_duplicate(dev, nv_connector->native_mode);
		drm_mode_probed_add(connector, mode);
		ret = 1;
	}

	/* Determine LVDS colour depth, must happen after determining
	 * "native" mode as some VBIOS tables require us to use the
	 * pixel clock as part of the lookup...
	 */
	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
		nouveau_connector_detect_depth(connector);

	if (nv_encoder->dcb->type == DCB_OUTPUT_TV)
		ret = get_slave_funcs(encoder)->get_modes(encoder, connector);

	if (nv_connector->type == DCB_CONNECTOR_LVDS ||
	    nv_connector->type == DCB_CONNECTOR_LVDS_SPWG ||
	    nv_connector->type == DCB_CONNECTOR_eDP)
		ret += nouveau_connector_scaler_modes_add(connector);

	return ret;
}

static unsigned
get_tmds_link_bandwidth(struct drm_connector *connector, bool hdmi)
{
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_drm *drm = nouveau_drm(connector->dev);
	struct dcb_output *dcb = nv_connector->detected_encoder->dcb;

	if (hdmi) {
		if (nouveau_hdmimhz > 0)
			return nouveau_hdmimhz * 1000;
		/* Note: these limits are conservative, some Fermi's
		 * can do 297 MHz. Unclear how this can be determined.
		 */
		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_KEPLER)
			return 297000;
		if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_FERMI)
			return 225000;
	}
	if (dcb->location != DCB_LOC_ON_CHIP ||
	    drm->client.device.info.chipset >= 0x46)
		return 165000;
	else if (drm->client.device.info.chipset >= 0x40)
		return 155000;
	else if (drm->client.device.info.chipset >= 0x18)
		return 135000;
	else
		return 112000;
}

static int
nouveau_connector_mode_valid(struct drm_connector *connector,
			     struct drm_display_mode *mode)
{
	struct nouveau_connector *nv_connector = nouveau_connector(connector);
	struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder;
	struct drm_encoder *encoder = to_drm_encoder(nv_encoder);
	unsigned min_clock = 25000, max_clock = min_clock;
	unsigned clock = mode->clock;
	bool hdmi;

	switch (nv_encoder->dcb->type) {
	case DCB_OUTPUT_LVDS:
		if (nv_connector->native_mode &&
		    (mode->hdisplay > nv_connector->native_mode->hdisplay ||
		     mode->vdisplay > nv_connector->native_mode->vdisplay))
			return MODE_PANEL;

		min_clock = 0;
		max_clock = 400000;
		break;
	case DCB_OUTPUT_TMDS:
		hdmi = drm_detect_hdmi_monitor(nv_connector->edid);
		max_clock = get_tmds_link_bandwidth(connector, hdmi);
		if (!hdmi && nouveau_duallink &&
		    nv_encoder->dcb->duallink_possible)
			max_clock *= 2;
		break;
	case DCB_OUTPUT_ANALOG:
		max_clock = nv_encoder->dcb->crtconf.maxfreq;
		if (!max_clock)
			max_clock = 350000;
		break;
	case DCB_OUTPUT_TV:
		return get_slave_funcs(encoder)->mode_valid(encoder, mode);
	case DCB_OUTPUT_DP:
		max_clock  = nv_encoder->dp.link_nr;
		max_clock *= nv_encoder->dp.link_bw;
		clock = clock * (connector->display_info.bpc * 3) / 10;
		break;
	default:
		BUG();
		return MODE_BAD;
	}

	if (clock < min_clock)
		return MODE_CLOCK_LOW;

	if (clock > max_clock)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static struct drm_encoder *
nouveau_connector_best_encoder(struct drm_connector *connector)
{
	struct nouveau_connector *nv_connector = nouveau_connector(connector);

	if (nv_connector->detected_encoder)
		return to_drm_encoder(nv_connector->detected_encoder);

	return NULL;
}

static const struct drm_connector_helper_funcs
nouveau_connector_helper_funcs = {
	.get_modes = nouveau_connector_get_modes,
	.mode_valid = nouveau_connector_mode_valid,
	.best_encoder = nouveau_connector_best_encoder,
};

static int
nouveau_connector_dpms(struct drm_connector *connector, int mode)
{
	if (drm_drv_uses_atomic_modeset(connector->dev))
		return drm_atomic_helper_connector_dpms(connector, mode);
	return drm_helper_connector_dpms(connector, mode);
}

static const struct drm_connector_funcs
nouveau_connector_funcs = {
	.dpms = nouveau_connector_dpms,
	.reset = nouveau_conn_reset,
	.detect = nouveau_connector_detect,
	.force = nouveau_connector_force,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = nouveau_connector_set_property,
	.destroy = nouveau_connector_destroy,
	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
	.atomic_set_property = nouveau_conn_atomic_set_property,
	.atomic_get_property = nouveau_conn_atomic_get_property,
};

static const struct drm_connector_funcs
nouveau_connector_funcs_lvds = {
	.dpms = nouveau_connector_dpms,
	.reset = nouveau_conn_reset,
	.detect = nouveau_connector_detect_lvds,
	.force = nouveau_connector_force,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = nouveau_connector_set_property,
	.destroy = nouveau_connector_destroy,
	.atomic_duplicate_state = nouveau_conn_atomic_duplicate_state,
	.atomic_destroy_state = nouveau_conn_atomic_destroy_state,
	.atomic_set_property = nouveau_conn_atomic_set_property,
	.atomic_get_property = nouveau_conn_atomic_get_property,
};

static int
nouveau_connector_hotplug(struct nvif_notify *notify)
{
	struct nouveau_connector *nv_connector =
		container_of(notify, typeof(*nv_connector), hpd);
	struct drm_connector *connector = &nv_connector->base;
	struct nouveau_drm *drm = nouveau_drm(connector->dev);
	const struct nvif_notify_conn_rep_v0 *rep = notify->data;
	const char *name = connector->name;
	struct nouveau_encoder *nv_encoder;

	if (rep->mask & NVIF_NOTIFY_CONN_V0_IRQ) {
		NV_DEBUG(drm, "service %s\n", name);
		if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP)))
			nv50_mstm_service(nv_encoder->dp.mstm);
	} else {
		bool plugged = (rep->mask != NVIF_NOTIFY_CONN_V0_UNPLUG);

		NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);
		if ((nv_encoder = find_encoder(connector, DCB_OUTPUT_DP))) {
			if (!plugged)
				nv50_mstm_remove(nv_encoder->dp.mstm);
		}

		drm_helper_hpd_irq_event(connector->dev);
	}

	return NVIF_NOTIFY_KEEP;
}

static ssize_t
nouveau_connector_aux_xfer(struct drm_dp_aux *obj, struct drm_dp_aux_msg *msg)
{
	struct nouveau_connector *nv_connector =
		container_of(obj, typeof(*nv_connector), aux);
	struct nouveau_encoder *nv_encoder;
	struct nvkm_i2c_aux *aux;
	int ret;

	nv_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
	if (!nv_encoder || !(aux = nv_encoder->aux))
		return -ENODEV;
	if (WARN_ON(msg->size > 16))
		return -E2BIG;
	if (msg->size == 0)
		return msg->size;

	ret = nvkm_i2c_aux_acquire(aux);
	if (ret)
		return ret;

	ret = nvkm_i2c_aux_xfer(aux, false, msg->request, msg->address,
				msg->buffer, msg->size);
	nvkm_i2c_aux_release(aux);
	if (ret >= 0) {
		msg->reply = ret;
		return msg->size;
	}

	return ret;
}

static int
drm_conntype_from_dcb(enum dcb_connector_type dcb)
{
	switch (dcb) {
	case DCB_CONNECTOR_VGA      : return DRM_MODE_CONNECTOR_VGA;
	case DCB_CONNECTOR_TV_0     :
	case DCB_CONNECTOR_TV_1     :
	case DCB_CONNECTOR_TV_3     : return DRM_MODE_CONNECTOR_TV;
	case DCB_CONNECTOR_DMS59_0  :
	case DCB_CONNECTOR_DMS59_1  :
	case DCB_CONNECTOR_DVI_I    : return DRM_MODE_CONNECTOR_DVII;
	case DCB_CONNECTOR_DVI_D    : return DRM_MODE_CONNECTOR_DVID;
	case DCB_CONNECTOR_LVDS     :
	case DCB_CONNECTOR_LVDS_SPWG: return DRM_MODE_CONNECTOR_LVDS;
	case DCB_CONNECTOR_DMS59_DP0:
	case DCB_CONNECTOR_DMS59_DP1:
	case DCB_CONNECTOR_DP       : return DRM_MODE_CONNECTOR_DisplayPort;
	case DCB_CONNECTOR_eDP      : return DRM_MODE_CONNECTOR_eDP;
	case DCB_CONNECTOR_HDMI_0   :
	case DCB_CONNECTOR_HDMI_1   :
	case DCB_CONNECTOR_HDMI_C   : return DRM_MODE_CONNECTOR_HDMIA;
	default:
		break;
	}

	return DRM_MODE_CONNECTOR_Unknown;
}

struct drm_connector *
nouveau_connector_create(struct drm_device *dev, int index)
{
	const struct drm_connector_funcs *funcs = &nouveau_connector_funcs;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_display *disp = nouveau_display(dev);
	struct nouveau_connector *nv_connector = NULL;
	struct drm_connector *connector;
	int type, ret = 0;
	bool dummy;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		nv_connector = nouveau_connector(connector);
		if (nv_connector->index == index)
			return connector;
	}

	nv_connector = kzalloc(sizeof(*nv_connector), GFP_KERNEL);
	if (!nv_connector)
		return ERR_PTR(-ENOMEM);

	connector = &nv_connector->base;
	nv_connector->index = index;

	/* attempt to parse vbios connector type and hotplug gpio */
	nv_connector->dcb = olddcb_conn(dev, index);
	if (nv_connector->dcb) {
		u32 entry = ROM16(nv_connector->dcb[0]);
		if (olddcb_conntab(dev)[3] >= 4)
			entry |= (u32)ROM16(nv_connector->dcb[2]) << 16;

		nv_connector->type = nv_connector->dcb[0];
		if (drm_conntype_from_dcb(nv_connector->type) ==
					  DRM_MODE_CONNECTOR_Unknown) {
			NV_WARN(drm, "unknown connector type %02x\n",
				nv_connector->type);
			nv_connector->type = DCB_CONNECTOR_NONE;
		}

		/* Gigabyte NX85T */
		if (nv_match_device(dev, 0x0421, 0x1458, 0x344c)) {
			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
				nv_connector->type = DCB_CONNECTOR_DVI_I;
		}

		/* Gigabyte GV-NX86T512H */
		if (nv_match_device(dev, 0x0402, 0x1458, 0x3455)) {
			if (nv_connector->type == DCB_CONNECTOR_HDMI_1)
				nv_connector->type = DCB_CONNECTOR_DVI_I;
		}
	} else {
		nv_connector->type = DCB_CONNECTOR_NONE;
	}

	/* no vbios data, or an unknown dcb connector type - attempt to
	 * figure out something suitable ourselves
	 */
	if (nv_connector->type == DCB_CONNECTOR_NONE) {
		struct nouveau_drm *drm = nouveau_drm(dev);
		struct dcb_table *dcbt = &drm->vbios.dcb;
		u32 encoders = 0;
		int i;

		for (i = 0; i < dcbt->entries; i++) {
			if (dcbt->entry[i].connector == nv_connector->index)
				encoders |= (1 << dcbt->entry[i].type);
		}

		if (encoders & (1 << DCB_OUTPUT_DP)) {
			if (encoders & (1 << DCB_OUTPUT_TMDS))
				nv_connector->type = DCB_CONNECTOR_DP;
			else
				nv_connector->type = DCB_CONNECTOR_eDP;
		} else
		if (encoders & (1 << DCB_OUTPUT_TMDS)) {
			if (encoders & (1 << DCB_OUTPUT_ANALOG))
				nv_connector->type = DCB_CONNECTOR_DVI_I;
			else
				nv_connector->type = DCB_CONNECTOR_DVI_D;
		} else
		if (encoders & (1 << DCB_OUTPUT_ANALOG)) {
			nv_connector->type = DCB_CONNECTOR_VGA;
		} else
		if (encoders & (1 << DCB_OUTPUT_LVDS)) {
			nv_connector->type = DCB_CONNECTOR_LVDS;
		} else
		if (encoders & (1 << DCB_OUTPUT_TV)) {
			nv_connector->type = DCB_CONNECTOR_TV_0;
		}
	}

	switch ((type = drm_conntype_from_dcb(nv_connector->type))) {
	case DRM_MODE_CONNECTOR_LVDS:
		ret = nouveau_bios_parse_lvds_table(dev, 0, &dummy, &dummy);
		if (ret) {
			NV_ERROR(drm, "Error parsing LVDS table, disabling\n");
			kfree(nv_connector);
			return ERR_PTR(ret);
		}

		funcs = &nouveau_connector_funcs_lvds;
		break;
	case DRM_MODE_CONNECTOR_DisplayPort:
	case DRM_MODE_CONNECTOR_eDP:
		nv_connector->aux.dev = dev->dev;
		nv_connector->aux.transfer = nouveau_connector_aux_xfer;
		ret = drm_dp_aux_register(&nv_connector->aux);
		if (ret) {
			NV_ERROR(drm, "failed to register aux channel\n");
			kfree(nv_connector);
			return ERR_PTR(ret);
		}

		funcs = &nouveau_connector_funcs;
		break;
	default:
		funcs = &nouveau_connector_funcs;
		break;
	}

	/* defaults, will get overridden in detect() */
	connector->interlace_allowed = false;
	connector->doublescan_allowed = false;

	drm_connector_init(dev, connector, funcs, type);
	drm_connector_helper_add(connector, &nouveau_connector_helper_funcs);

	connector->funcs->reset(connector);
	nouveau_conn_attach_properties(connector);

	/* Default scaling mode */
	switch (nv_connector->type) {
	case DCB_CONNECTOR_LVDS:
	case DCB_CONNECTOR_LVDS_SPWG:
	case DCB_CONNECTOR_eDP:
		/* see note in nouveau_connector_set_property() */
		if (disp->disp.oclass < NV50_DISP) {
			nv_connector->scaling_mode = DRM_MODE_SCALE_FULLSCREEN;
			break;
		}
		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
		break;
	default:
		nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
		break;
	}

	/* dithering properties */
	switch (nv_connector->type) {
	case DCB_CONNECTOR_TV_0:
	case DCB_CONNECTOR_TV_1:
	case DCB_CONNECTOR_TV_3:
	case DCB_CONNECTOR_VGA:
		break;
	default:
		nv_connector->dithering_mode = DITHERING_MODE_AUTO;
		break;
	}

	ret = nvif_notify_init(&disp->disp, nouveau_connector_hotplug, true,
			       NV04_DISP_NTFY_CONN,
			       &(struct nvif_notify_conn_req_v0) {
				.mask = NVIF_NOTIFY_CONN_V0_ANY,
				.conn = index,
			       },
			       sizeof(struct nvif_notify_conn_req_v0),
			       sizeof(struct nvif_notify_conn_rep_v0),
			       &nv_connector->hpd);
	if (ret)
		connector->polled = DRM_CONNECTOR_POLL_CONNECT;
	else
		connector->polled = DRM_CONNECTOR_POLL_HPD;

	drm_connector_register(connector);
	return connector;
}