summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_ipp.c
blob: b7f1cbc46cc2c306a5135e52cd19959462d3667e (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
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
/*
 * Copyright (C) 2012 Samsung Electronics Co.Ltd
 * Authors:
 *	Eunchul Kim <chulspro.kim@samsung.com>
 *	Jinyoung Jeon <jy0.jeon@samsung.com>
 *	Sangmin Lee <lsmin.lee@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>

#include <drm/drmP.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_ipp.h"
#include "exynos_drm_iommu.h"

/*
 * IPP stands for Image Post Processing and
 * supports image scaler/rotator and input/output DMA operations.
 * using FIMC, GSC, Rotator, so on.
 * IPP is integration device driver of same attribute h/w
 */

/*
 * TODO
 * 1. expand command control id.
 * 2. integrate	property and config.
 * 3. removed send_event id check routine.
 * 4. compare send_event id if needed.
 * 5. free subdrv_remove notifier callback list if needed.
 * 6. need to check subdrv_open about multi-open.
 * 7. need to power_on implement power and sysmmu ctrl.
 */

#define get_ipp_context(dev)	platform_get_drvdata(to_platform_device(dev))
#define ipp_is_m2m_cmd(c)	(c == IPP_CMD_M2M)

/* platform device pointer for ipp device. */
static struct platform_device *exynos_drm_ipp_pdev;

/*
 * A structure of event.
 *
 * @base: base of event.
 * @event: ipp event.
 */
struct drm_exynos_ipp_send_event {
	struct drm_pending_event	base;
	struct drm_exynos_ipp_event	event;
};

/*
 * A structure of memory node.
 *
 * @list: list head to memory queue information.
 * @ops_id: id of operations.
 * @prop_id: id of property.
 * @buf_id: id of buffer.
 * @buf_info: gem objects and dma address, size.
 * @filp: a pointer to drm_file.
 */
struct drm_exynos_ipp_mem_node {
	struct list_head	list;
	enum drm_exynos_ops_id	ops_id;
	u32	prop_id;
	u32	buf_id;
	struct drm_exynos_ipp_buf_info	buf_info;
};

/*
 * A structure of ipp context.
 *
 * @subdrv: prepare initialization using subdrv.
 * @ipp_lock: lock for synchronization of access to ipp_idr.
 * @prop_lock: lock for synchronization of access to prop_idr.
 * @ipp_idr: ipp driver idr.
 * @prop_idr: property idr.
 * @event_workq: event work queue.
 * @cmd_workq: command work queue.
 */
struct ipp_context {
	struct exynos_drm_subdrv	subdrv;
	struct mutex	ipp_lock;
	struct mutex	prop_lock;
	struct idr	ipp_idr;
	struct idr	prop_idr;
	struct workqueue_struct	*event_workq;
	struct workqueue_struct	*cmd_workq;
};

static LIST_HEAD(exynos_drm_ippdrv_list);
static DEFINE_MUTEX(exynos_drm_ippdrv_lock);
static BLOCKING_NOTIFIER_HEAD(exynos_drm_ippnb_list);

int exynos_platform_device_ipp_register(void)
{
	struct platform_device *pdev;

	if (exynos_drm_ipp_pdev)
		return -EEXIST;

	pdev = platform_device_register_simple("exynos-drm-ipp", -1, NULL, 0);
	if (IS_ERR(pdev))
		return PTR_ERR(pdev);

	exynos_drm_ipp_pdev = pdev;

	return 0;
}

void exynos_platform_device_ipp_unregister(void)
{
	if (exynos_drm_ipp_pdev) {
		platform_device_unregister(exynos_drm_ipp_pdev);
		exynos_drm_ipp_pdev = NULL;
	}
}

int exynos_drm_ippdrv_register(struct exynos_drm_ippdrv *ippdrv)
{
	mutex_lock(&exynos_drm_ippdrv_lock);
	list_add_tail(&ippdrv->drv_list, &exynos_drm_ippdrv_list);
	mutex_unlock(&exynos_drm_ippdrv_lock);

	return 0;
}

int exynos_drm_ippdrv_unregister(struct exynos_drm_ippdrv *ippdrv)
{
	mutex_lock(&exynos_drm_ippdrv_lock);
	list_del(&ippdrv->drv_list);
	mutex_unlock(&exynos_drm_ippdrv_lock);

	return 0;
}

static int ipp_create_id(struct idr *id_idr, struct mutex *lock, void *obj)
{
	int ret;

	mutex_lock(lock);
	ret = idr_alloc(id_idr, obj, 1, 0, GFP_KERNEL);
	mutex_unlock(lock);

	return ret;
}

static void ipp_remove_id(struct idr *id_idr, struct mutex *lock, u32 id)
{
	mutex_lock(lock);
	idr_remove(id_idr, id);
	mutex_unlock(lock);
}

static void *ipp_find_obj(struct idr *id_idr, struct mutex *lock, u32 id)
{
	void *obj;

	mutex_lock(lock);
	obj = idr_find(id_idr, id);
	mutex_unlock(lock);

	return obj;
}

static int ipp_check_driver(struct exynos_drm_ippdrv *ippdrv,
			    struct drm_exynos_ipp_property *property)
{
	if (ippdrv->dedicated || (!ipp_is_m2m_cmd(property->cmd) &&
				  !pm_runtime_suspended(ippdrv->dev)))
		return -EBUSY;

	if (ippdrv->check_property &&
	    ippdrv->check_property(ippdrv->dev, property))
		return -EINVAL;

	return 0;
}

static struct exynos_drm_ippdrv *ipp_find_driver(struct ipp_context *ctx,
		struct drm_exynos_ipp_property *property)
{
	struct exynos_drm_ippdrv *ippdrv;
	u32 ipp_id = property->ipp_id;
	int ret;

	if (ipp_id) {
		ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock, ipp_id);
		if (!ippdrv) {
			DRM_DEBUG("ipp%d driver not found\n", ipp_id);
			return ERR_PTR(-ENODEV);
		}

		ret = ipp_check_driver(ippdrv, property);
		if (ret < 0) {
			DRM_DEBUG("ipp%d driver check error %d\n", ipp_id, ret);
			return ERR_PTR(ret);
		}

		return ippdrv;
	} else {
		list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
			ret = ipp_check_driver(ippdrv, property);
			if (ret == 0)
				return ippdrv;
		}

		DRM_DEBUG("cannot find driver suitable for given property.\n");
	}

	return ERR_PTR(-ENODEV);
}

static struct exynos_drm_ippdrv *ipp_find_drv_by_handle(u32 prop_id)
{
	struct exynos_drm_ippdrv *ippdrv;
	struct drm_exynos_ipp_cmd_node *c_node;
	int count = 0;

	DRM_DEBUG_KMS("prop_id[%d]\n", prop_id);

	/*
	 * This case is search ipp driver by prop_id handle.
	 * sometimes, ipp subsystem find driver by prop_id.
	 * e.g PAUSE state, queue buf, command control.
	 */
	list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
		DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n", count++, (int)ippdrv);

		mutex_lock(&ippdrv->cmd_lock);
		list_for_each_entry(c_node, &ippdrv->cmd_list, list) {
			if (c_node->property.prop_id == prop_id) {
				mutex_unlock(&ippdrv->cmd_lock);
				return ippdrv;
			}
		}
		mutex_unlock(&ippdrv->cmd_lock);
	}

	return ERR_PTR(-ENODEV);
}

int exynos_drm_ipp_get_property(struct drm_device *drm_dev, void *data,
		struct drm_file *file)
{
	struct drm_exynos_file_private *file_priv = file->driver_priv;
	struct device *dev = file_priv->ipp_dev;
	struct ipp_context *ctx = get_ipp_context(dev);
	struct drm_exynos_ipp_prop_list *prop_list = data;
	struct exynos_drm_ippdrv *ippdrv;
	int count = 0;

	if (!ctx) {
		DRM_ERROR("invalid context.\n");
		return -EINVAL;
	}

	if (!prop_list) {
		DRM_ERROR("invalid property parameter.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("ipp_id[%d]\n", prop_list->ipp_id);

	if (!prop_list->ipp_id) {
		list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list)
			count++;

		/*
		 * Supports ippdrv list count for user application.
		 * First step user application getting ippdrv count.
		 * and second step getting ippdrv capability using ipp_id.
		 */
		prop_list->count = count;
	} else {
		/*
		 * Getting ippdrv capability by ipp_id.
		 * some device not supported wb, output interface.
		 * so, user application detect correct ipp driver
		 * using this ioctl.
		 */
		ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock,
						prop_list->ipp_id);
		if (!ippdrv) {
			DRM_ERROR("not found ipp%d driver.\n",
					prop_list->ipp_id);
			return -ENODEV;
		}

		*prop_list = ippdrv->prop_list;
	}

	return 0;
}

static void ipp_print_property(struct drm_exynos_ipp_property *property,
		int idx)
{
	struct drm_exynos_ipp_config *config = &property->config[idx];
	struct drm_exynos_pos *pos = &config->pos;
	struct drm_exynos_sz *sz = &config->sz;

	DRM_DEBUG_KMS("prop_id[%d]ops[%s]fmt[0x%x]\n",
		property->prop_id, idx ? "dst" : "src", config->fmt);

	DRM_DEBUG_KMS("pos[%d %d %d %d]sz[%d %d]f[%d]r[%d]\n",
		pos->x, pos->y, pos->w, pos->h,
		sz->hsize, sz->vsize, config->flip, config->degree);
}

static struct drm_exynos_ipp_cmd_work *ipp_create_cmd_work(void)
{
	struct drm_exynos_ipp_cmd_work *cmd_work;

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

	INIT_WORK((struct work_struct *)cmd_work, ipp_sched_cmd);

	return cmd_work;
}

static struct drm_exynos_ipp_event_work *ipp_create_event_work(void)
{
	struct drm_exynos_ipp_event_work *event_work;

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

	INIT_WORK(&event_work->work, ipp_sched_event);

	return event_work;
}

int exynos_drm_ipp_set_property(struct drm_device *drm_dev, void *data,
		struct drm_file *file)
{
	struct drm_exynos_file_private *file_priv = file->driver_priv;
	struct device *dev = file_priv->ipp_dev;
	struct ipp_context *ctx = get_ipp_context(dev);
	struct drm_exynos_ipp_property *property = data;
	struct exynos_drm_ippdrv *ippdrv;
	struct drm_exynos_ipp_cmd_node *c_node;
	u32 prop_id;
	int ret, i;

	if (!ctx) {
		DRM_ERROR("invalid context.\n");
		return -EINVAL;
	}

	if (!property) {
		DRM_ERROR("invalid property parameter.\n");
		return -EINVAL;
	}

	prop_id = property->prop_id;

	/*
	 * This is log print for user application property.
	 * user application set various property.
	 */
	for_each_ipp_ops(i)
		ipp_print_property(property, i);

	/*
	 * In case prop_id is not zero try to set existing property.
	 */
	if (prop_id) {
		c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock, prop_id);

		if (!c_node || c_node->filp != file) {
			DRM_DEBUG_KMS("prop_id[%d] not found\n", prop_id);
			return -EINVAL;
		}

		if (c_node->state != IPP_STATE_STOP) {
			DRM_DEBUG_KMS("prop_id[%d] not stopped\n", prop_id);
			return -EINVAL;
		}

		c_node->property = *property;

		return 0;
	}

	/* find ipp driver using ipp id */
	ippdrv = ipp_find_driver(ctx, property);
	if (IS_ERR(ippdrv)) {
		DRM_ERROR("failed to get ipp driver.\n");
		return -EINVAL;
	}

	/* allocate command node */
	c_node = kzalloc(sizeof(*c_node), GFP_KERNEL);
	if (!c_node)
		return -ENOMEM;

	ret = ipp_create_id(&ctx->prop_idr, &ctx->prop_lock, c_node);
	if (ret < 0) {
		DRM_ERROR("failed to create id.\n");
		goto err_clear;
	}
	property->prop_id = ret;

	DRM_DEBUG_KMS("created prop_id[%d]cmd[%d]ippdrv[0x%x]\n",
		property->prop_id, property->cmd, (int)ippdrv);

	/* stored property information and ippdrv in private data */
	c_node->property = *property;
	c_node->state = IPP_STATE_IDLE;
	c_node->filp = file;

	c_node->start_work = ipp_create_cmd_work();
	if (IS_ERR(c_node->start_work)) {
		DRM_ERROR("failed to create start work.\n");
		ret = PTR_ERR(c_node->start_work);
		goto err_remove_id;
	}

	c_node->stop_work = ipp_create_cmd_work();
	if (IS_ERR(c_node->stop_work)) {
		DRM_ERROR("failed to create stop work.\n");
		ret = PTR_ERR(c_node->stop_work);
		goto err_free_start;
	}

	c_node->event_work = ipp_create_event_work();
	if (IS_ERR(c_node->event_work)) {
		DRM_ERROR("failed to create event work.\n");
		ret = PTR_ERR(c_node->event_work);
		goto err_free_stop;
	}

	mutex_init(&c_node->lock);
	mutex_init(&c_node->mem_lock);
	mutex_init(&c_node->event_lock);

	init_completion(&c_node->start_complete);
	init_completion(&c_node->stop_complete);

	for_each_ipp_ops(i)
		INIT_LIST_HEAD(&c_node->mem_list[i]);

	INIT_LIST_HEAD(&c_node->event_list);
	mutex_lock(&ippdrv->cmd_lock);
	list_add_tail(&c_node->list, &ippdrv->cmd_list);
	mutex_unlock(&ippdrv->cmd_lock);

	/* make dedicated state without m2m */
	if (!ipp_is_m2m_cmd(property->cmd))
		ippdrv->dedicated = true;

	return 0;

err_free_stop:
	kfree(c_node->stop_work);
err_free_start:
	kfree(c_node->start_work);
err_remove_id:
	ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock, property->prop_id);
err_clear:
	kfree(c_node);
	return ret;
}

static int ipp_validate_mem_node(struct drm_device *drm_dev,
				 struct drm_exynos_ipp_mem_node *m_node,
				 struct drm_exynos_ipp_cmd_node *c_node)
{
	struct drm_exynos_ipp_config *ipp_cfg;
	unsigned int num_plane;
	unsigned long min_size, size;
	unsigned int bpp;
	int i;

	/* The property id should already be varified */
	ipp_cfg = &c_node->property.config[m_node->prop_id];
	num_plane = drm_format_num_planes(ipp_cfg->fmt);

	/**
	 * This is a rather simplified validation of a memory node.
	 * It basically verifies provided gem object handles
	 * and the buffer sizes with respect to current configuration.
	 * This is not the best that can be done
	 * but it seems more than enough
	 */
	for (i = 0; i < num_plane; ++i) {
		if (!m_node->buf_info.handles[i]) {
			DRM_ERROR("invalid handle for plane %d\n", i);
			return -EINVAL;
		}
		bpp = drm_format_plane_cpp(ipp_cfg->fmt, i);
		min_size = (ipp_cfg->sz.hsize * ipp_cfg->sz.vsize * bpp) >> 3;
		size = exynos_drm_gem_get_size(drm_dev,
					       m_node->buf_info.handles[i],
					       c_node->filp);
		if (min_size > size) {
			DRM_ERROR("invalid size for plane %d\n", i);
			return -EINVAL;
		}
	}
	return 0;
}

static int ipp_put_mem_node(struct drm_device *drm_dev,
		struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_mem_node *m_node)
{
	int i;

	DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);

	if (!m_node) {
		DRM_ERROR("invalid dequeue node.\n");
		return -EFAULT;
	}

	DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);

	/* put gem buffer */
	for_each_ipp_planar(i) {
		unsigned long handle = m_node->buf_info.handles[i];
		if (handle)
			exynos_drm_gem_put_dma_addr(drm_dev, handle,
							c_node->filp);
	}

	list_del(&m_node->list);
	kfree(m_node);

	return 0;
}

static struct drm_exynos_ipp_mem_node
		*ipp_get_mem_node(struct drm_device *drm_dev,
		struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_queue_buf *qbuf)
{
	struct drm_exynos_ipp_mem_node *m_node;
	struct drm_exynos_ipp_buf_info *buf_info;
	int i;

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

	buf_info = &m_node->buf_info;

	/* operations, buffer id */
	m_node->ops_id = qbuf->ops_id;
	m_node->prop_id = qbuf->prop_id;
	m_node->buf_id = qbuf->buf_id;
	INIT_LIST_HEAD(&m_node->list);

	DRM_DEBUG_KMS("m_node[0x%x]ops_id[%d]\n", (int)m_node, qbuf->ops_id);
	DRM_DEBUG_KMS("prop_id[%d]buf_id[%d]\n", qbuf->prop_id, m_node->buf_id);

	for_each_ipp_planar(i) {
		DRM_DEBUG_KMS("i[%d]handle[0x%x]\n", i, qbuf->handle[i]);

		/* get dma address by handle */
		if (qbuf->handle[i]) {
			dma_addr_t *addr;

			addr = exynos_drm_gem_get_dma_addr(drm_dev,
					qbuf->handle[i], c_node->filp);
			if (IS_ERR(addr)) {
				DRM_ERROR("failed to get addr.\n");
				ipp_put_mem_node(drm_dev, c_node, m_node);
				return ERR_PTR(-EFAULT);
			}

			buf_info->handles[i] = qbuf->handle[i];
			buf_info->base[i] = *addr;
			DRM_DEBUG_KMS("i[%d]base[0x%x]hd[0x%lx]\n", i,
				      buf_info->base[i], buf_info->handles[i]);
		}
	}

	mutex_lock(&c_node->mem_lock);
	if (ipp_validate_mem_node(drm_dev, m_node, c_node)) {
		ipp_put_mem_node(drm_dev, c_node, m_node);
		mutex_unlock(&c_node->mem_lock);
		return ERR_PTR(-EFAULT);
	}
	list_add_tail(&m_node->list, &c_node->mem_list[qbuf->ops_id]);
	mutex_unlock(&c_node->mem_lock);

	return m_node;
}

static void ipp_clean_mem_nodes(struct drm_device *drm_dev,
			       struct drm_exynos_ipp_cmd_node *c_node, int ops)
{
	struct drm_exynos_ipp_mem_node *m_node, *tm_node;
	struct list_head *head = &c_node->mem_list[ops];

	mutex_lock(&c_node->mem_lock);

	list_for_each_entry_safe(m_node, tm_node, head, list) {
		int ret;

		ret = ipp_put_mem_node(drm_dev, c_node, m_node);
		if (ret)
			DRM_ERROR("failed to put m_node.\n");
	}

	mutex_unlock(&c_node->mem_lock);
}

static void ipp_free_event(struct drm_pending_event *event)
{
	kfree(event);
}

static int ipp_get_event(struct drm_device *drm_dev,
		struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_queue_buf *qbuf)
{
	struct drm_exynos_ipp_send_event *e;
	unsigned long flags;

	DRM_DEBUG_KMS("ops_id[%d]buf_id[%d]\n", qbuf->ops_id, qbuf->buf_id);

	e = kzalloc(sizeof(*e), GFP_KERNEL);
	if (!e) {
		spin_lock_irqsave(&drm_dev->event_lock, flags);
		c_node->filp->event_space += sizeof(e->event);
		spin_unlock_irqrestore(&drm_dev->event_lock, flags);
		return -ENOMEM;
	}

	/* make event */
	e->event.base.type = DRM_EXYNOS_IPP_EVENT;
	e->event.base.length = sizeof(e->event);
	e->event.user_data = qbuf->user_data;
	e->event.prop_id = qbuf->prop_id;
	e->event.buf_id[EXYNOS_DRM_OPS_DST] = qbuf->buf_id;
	e->base.event = &e->event.base;
	e->base.file_priv = c_node->filp;
	e->base.destroy = ipp_free_event;
	mutex_lock(&c_node->event_lock);
	list_add_tail(&e->base.link, &c_node->event_list);
	mutex_unlock(&c_node->event_lock);

	return 0;
}

static void ipp_put_event(struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_queue_buf *qbuf)
{
	struct drm_exynos_ipp_send_event *e, *te;
	int count = 0;

	mutex_lock(&c_node->event_lock);
	list_for_each_entry_safe(e, te, &c_node->event_list, base.link) {
		DRM_DEBUG_KMS("count[%d]e[0x%x]\n", count++, (int)e);

		/*
		 * qbuf == NULL condition means all event deletion.
		 * stop operations want to delete all event list.
		 * another case delete only same buf id.
		 */
		if (!qbuf) {
			/* delete list */
			list_del(&e->base.link);
			kfree(e);
		}

		/* compare buffer id */
		if (qbuf && (qbuf->buf_id ==
		    e->event.buf_id[EXYNOS_DRM_OPS_DST])) {
			/* delete list */
			list_del(&e->base.link);
			kfree(e);
			goto out_unlock;
		}
	}

out_unlock:
	mutex_unlock(&c_node->event_lock);
	return;
}

static void ipp_clean_cmd_node(struct ipp_context *ctx,
				struct drm_exynos_ipp_cmd_node *c_node)
{
	int i;

	/* cancel works */
	cancel_work_sync(&c_node->start_work->work);
	cancel_work_sync(&c_node->stop_work->work);
	cancel_work_sync(&c_node->event_work->work);

	/* put event */
	ipp_put_event(c_node, NULL);

	for_each_ipp_ops(i)
		ipp_clean_mem_nodes(ctx->subdrv.drm_dev, c_node, i);

	/* delete list */
	list_del(&c_node->list);

	ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock,
			c_node->property.prop_id);

	/* destroy mutex */
	mutex_destroy(&c_node->lock);
	mutex_destroy(&c_node->mem_lock);
	mutex_destroy(&c_node->event_lock);

	/* free command node */
	kfree(c_node->start_work);
	kfree(c_node->stop_work);
	kfree(c_node->event_work);
	kfree(c_node);
}

static bool ipp_check_mem_list(struct drm_exynos_ipp_cmd_node *c_node)
{
	switch (c_node->property.cmd) {
	case IPP_CMD_WB:
		return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
	case IPP_CMD_OUTPUT:
		return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]);
	case IPP_CMD_M2M:
	default:
		return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]) &&
		       !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
	}
}

static struct drm_exynos_ipp_mem_node
		*ipp_find_mem_node(struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_queue_buf *qbuf)
{
	struct drm_exynos_ipp_mem_node *m_node;
	struct list_head *head;
	int count = 0;

	DRM_DEBUG_KMS("buf_id[%d]\n", qbuf->buf_id);

	/* source/destination memory list */
	head = &c_node->mem_list[qbuf->ops_id];

	/* find memory node from memory list */
	list_for_each_entry(m_node, head, list) {
		DRM_DEBUG_KMS("count[%d]m_node[0x%x]\n", count++, (int)m_node);

		/* compare buffer id */
		if (m_node->buf_id == qbuf->buf_id)
			return m_node;
	}

	return NULL;
}

static int ipp_set_mem_node(struct exynos_drm_ippdrv *ippdrv,
		struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_mem_node *m_node)
{
	struct exynos_drm_ipp_ops *ops = NULL;
	int ret = 0;

	DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);

	if (!m_node) {
		DRM_ERROR("invalid queue node.\n");
		return -EFAULT;
	}

	DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);

	/* get operations callback */
	ops = ippdrv->ops[m_node->ops_id];
	if (!ops) {
		DRM_ERROR("not support ops.\n");
		return -EFAULT;
	}

	/* set address and enable irq */
	if (ops->set_addr) {
		ret = ops->set_addr(ippdrv->dev, &m_node->buf_info,
			m_node->buf_id, IPP_BUF_ENQUEUE);
		if (ret) {
			DRM_ERROR("failed to set addr.\n");
			return ret;
		}
	}

	return ret;
}

static void ipp_handle_cmd_work(struct device *dev,
		struct exynos_drm_ippdrv *ippdrv,
		struct drm_exynos_ipp_cmd_work *cmd_work,
		struct drm_exynos_ipp_cmd_node *c_node)
{
	struct ipp_context *ctx = get_ipp_context(dev);

	cmd_work->ippdrv = ippdrv;
	cmd_work->c_node = c_node;
	queue_work(ctx->cmd_workq, &cmd_work->work);
}

static int ipp_queue_buf_with_run(struct device *dev,
		struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_mem_node *m_node,
		struct drm_exynos_ipp_queue_buf *qbuf)
{
	struct exynos_drm_ippdrv *ippdrv;
	struct drm_exynos_ipp_property *property;
	struct exynos_drm_ipp_ops *ops;
	int ret;

	ippdrv = ipp_find_drv_by_handle(qbuf->prop_id);
	if (IS_ERR(ippdrv)) {
		DRM_ERROR("failed to get ipp driver.\n");
		return -EFAULT;
	}

	ops = ippdrv->ops[qbuf->ops_id];
	if (!ops) {
		DRM_ERROR("failed to get ops.\n");
		return -EFAULT;
	}

	property = &c_node->property;

	if (c_node->state != IPP_STATE_START) {
		DRM_DEBUG_KMS("bypass for invalid state.\n");
		return 0;
	}

	mutex_lock(&c_node->mem_lock);
	if (!ipp_check_mem_list(c_node)) {
		mutex_unlock(&c_node->mem_lock);
		DRM_DEBUG_KMS("empty memory.\n");
		return 0;
	}

	/*
	 * If set destination buffer and enabled clock,
	 * then m2m operations need start operations at queue_buf
	 */
	if (ipp_is_m2m_cmd(property->cmd)) {
		struct drm_exynos_ipp_cmd_work *cmd_work = c_node->start_work;

		cmd_work->ctrl = IPP_CTRL_PLAY;
		ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
	} else {
		ret = ipp_set_mem_node(ippdrv, c_node, m_node);
		if (ret) {
			mutex_unlock(&c_node->mem_lock);
			DRM_ERROR("failed to set m node.\n");
			return ret;
		}
	}
	mutex_unlock(&c_node->mem_lock);

	return 0;
}

static void ipp_clean_queue_buf(struct drm_device *drm_dev,
		struct drm_exynos_ipp_cmd_node *c_node,
		struct drm_exynos_ipp_queue_buf *qbuf)
{
	struct drm_exynos_ipp_mem_node *m_node, *tm_node;

	/* delete list */
	mutex_lock(&c_node->mem_lock);
	list_for_each_entry_safe(m_node, tm_node,
		&c_node->mem_list[qbuf->ops_id], list) {
		if (m_node->buf_id == qbuf->buf_id &&
		    m_node->ops_id == qbuf->ops_id)
			ipp_put_mem_node(drm_dev, c_node, m_node);
	}
	mutex_unlock(&c_node->mem_lock);
}

int exynos_drm_ipp_queue_buf(struct drm_device *drm_dev, void *data,
		struct drm_file *file)
{
	struct drm_exynos_file_private *file_priv = file->driver_priv;
	struct device *dev = file_priv->ipp_dev;
	struct ipp_context *ctx = get_ipp_context(dev);
	struct drm_exynos_ipp_queue_buf *qbuf = data;
	struct drm_exynos_ipp_cmd_node *c_node;
	struct drm_exynos_ipp_mem_node *m_node;
	int ret;

	if (!qbuf) {
		DRM_ERROR("invalid buf parameter.\n");
		return -EINVAL;
	}

	if (qbuf->ops_id >= EXYNOS_DRM_OPS_MAX) {
		DRM_ERROR("invalid ops parameter.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("prop_id[%d]ops_id[%s]buf_id[%d]buf_type[%d]\n",
		qbuf->prop_id, qbuf->ops_id ? "dst" : "src",
		qbuf->buf_id, qbuf->buf_type);

	/* find command node */
	c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
		qbuf->prop_id);
	if (!c_node || c_node->filp != file) {
		DRM_ERROR("failed to get command node.\n");
		return -ENODEV;
	}

	/* buffer control */
	switch (qbuf->buf_type) {
	case IPP_BUF_ENQUEUE:
		/* get memory node */
		m_node = ipp_get_mem_node(drm_dev, c_node, qbuf);
		if (IS_ERR(m_node)) {
			DRM_ERROR("failed to get m_node.\n");
			return PTR_ERR(m_node);
		}

		/*
		 * first step get event for destination buffer.
		 * and second step when M2M case run with destination buffer
		 * if needed.
		 */
		if (qbuf->ops_id == EXYNOS_DRM_OPS_DST) {
			/* get event for destination buffer */
			ret = ipp_get_event(drm_dev, c_node, qbuf);
			if (ret) {
				DRM_ERROR("failed to get event.\n");
				goto err_clean_node;
			}

			/*
			 * M2M case run play control for streaming feature.
			 * other case set address and waiting.
			 */
			ret = ipp_queue_buf_with_run(dev, c_node, m_node, qbuf);
			if (ret) {
				DRM_ERROR("failed to run command.\n");
				goto err_clean_node;
			}
		}
		break;
	case IPP_BUF_DEQUEUE:
		mutex_lock(&c_node->lock);

		/* put event for destination buffer */
		if (qbuf->ops_id == EXYNOS_DRM_OPS_DST)
			ipp_put_event(c_node, qbuf);

		ipp_clean_queue_buf(drm_dev, c_node, qbuf);

		mutex_unlock(&c_node->lock);
		break;
	default:
		DRM_ERROR("invalid buffer control.\n");
		return -EINVAL;
	}

	return 0;

err_clean_node:
	DRM_ERROR("clean memory nodes.\n");

	ipp_clean_queue_buf(drm_dev, c_node, qbuf);
	return ret;
}

static bool exynos_drm_ipp_check_valid(struct device *dev,
		enum drm_exynos_ipp_ctrl ctrl, enum drm_exynos_ipp_state state)
{
	if (ctrl != IPP_CTRL_PLAY) {
		if (pm_runtime_suspended(dev)) {
			DRM_ERROR("pm:runtime_suspended.\n");
			goto err_status;
		}
	}

	switch (ctrl) {
	case IPP_CTRL_PLAY:
		if (state != IPP_STATE_IDLE)
			goto err_status;
		break;
	case IPP_CTRL_STOP:
		if (state == IPP_STATE_STOP)
			goto err_status;
		break;
	case IPP_CTRL_PAUSE:
		if (state != IPP_STATE_START)
			goto err_status;
		break;
	case IPP_CTRL_RESUME:
		if (state != IPP_STATE_STOP)
			goto err_status;
		break;
	default:
		DRM_ERROR("invalid state.\n");
		goto err_status;
	}

	return true;

err_status:
	DRM_ERROR("invalid status:ctrl[%d]state[%d]\n", ctrl, state);
	return false;
}

int exynos_drm_ipp_cmd_ctrl(struct drm_device *drm_dev, void *data,
		struct drm_file *file)
{
	struct drm_exynos_file_private *file_priv = file->driver_priv;
	struct exynos_drm_ippdrv *ippdrv = NULL;
	struct device *dev = file_priv->ipp_dev;
	struct ipp_context *ctx = get_ipp_context(dev);
	struct drm_exynos_ipp_cmd_ctrl *cmd_ctrl = data;
	struct drm_exynos_ipp_cmd_work *cmd_work;
	struct drm_exynos_ipp_cmd_node *c_node;

	if (!ctx) {
		DRM_ERROR("invalid context.\n");
		return -EINVAL;
	}

	if (!cmd_ctrl) {
		DRM_ERROR("invalid control parameter.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("ctrl[%d]prop_id[%d]\n",
		cmd_ctrl->ctrl, cmd_ctrl->prop_id);

	ippdrv = ipp_find_drv_by_handle(cmd_ctrl->prop_id);
	if (IS_ERR(ippdrv)) {
		DRM_ERROR("failed to get ipp driver.\n");
		return PTR_ERR(ippdrv);
	}

	c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
		cmd_ctrl->prop_id);
	if (!c_node || c_node->filp != file) {
		DRM_ERROR("invalid command node list.\n");
		return -ENODEV;
	}

	if (!exynos_drm_ipp_check_valid(ippdrv->dev, cmd_ctrl->ctrl,
	    c_node->state)) {
		DRM_ERROR("invalid state.\n");
		return -EINVAL;
	}

	switch (cmd_ctrl->ctrl) {
	case IPP_CTRL_PLAY:
		if (pm_runtime_suspended(ippdrv->dev))
			pm_runtime_get_sync(ippdrv->dev);

		c_node->state = IPP_STATE_START;

		cmd_work = c_node->start_work;
		cmd_work->ctrl = cmd_ctrl->ctrl;
		ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
		break;
	case IPP_CTRL_STOP:
		cmd_work = c_node->stop_work;
		cmd_work->ctrl = cmd_ctrl->ctrl;
		ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);

		if (!wait_for_completion_timeout(&c_node->stop_complete,
		    msecs_to_jiffies(300))) {
			DRM_ERROR("timeout stop:prop_id[%d]\n",
				c_node->property.prop_id);
		}

		c_node->state = IPP_STATE_STOP;
		ippdrv->dedicated = false;
		mutex_lock(&ippdrv->cmd_lock);
		ipp_clean_cmd_node(ctx, c_node);

		if (list_empty(&ippdrv->cmd_list))
			pm_runtime_put_sync(ippdrv->dev);
		mutex_unlock(&ippdrv->cmd_lock);
		break;
	case IPP_CTRL_PAUSE:
		cmd_work = c_node->stop_work;
		cmd_work->ctrl = cmd_ctrl->ctrl;
		ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);

		if (!wait_for_completion_timeout(&c_node->stop_complete,
		    msecs_to_jiffies(200))) {
			DRM_ERROR("timeout stop:prop_id[%d]\n",
				c_node->property.prop_id);
		}

		c_node->state = IPP_STATE_STOP;
		break;
	case IPP_CTRL_RESUME:
		c_node->state = IPP_STATE_START;
		cmd_work = c_node->start_work;
		cmd_work->ctrl = cmd_ctrl->ctrl;
		ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
		break;
	default:
		DRM_ERROR("could not support this state currently.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("done ctrl[%d]prop_id[%d]\n",
		cmd_ctrl->ctrl, cmd_ctrl->prop_id);

	return 0;
}

int exynos_drm_ippnb_register(struct notifier_block *nb)
{
	return blocking_notifier_chain_register(
		&exynos_drm_ippnb_list, nb);
}

int exynos_drm_ippnb_unregister(struct notifier_block *nb)
{
	return blocking_notifier_chain_unregister(
		&exynos_drm_ippnb_list, nb);
}

int exynos_drm_ippnb_send_event(unsigned long val, void *v)
{
	return blocking_notifier_call_chain(
		&exynos_drm_ippnb_list, val, v);
}

static int ipp_set_property(struct exynos_drm_ippdrv *ippdrv,
		struct drm_exynos_ipp_property *property)
{
	struct exynos_drm_ipp_ops *ops = NULL;
	bool swap = false;
	int ret, i;

	if (!property) {
		DRM_ERROR("invalid property parameter.\n");
		return -EINVAL;
	}

	DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);

	/* reset h/w block */
	if (ippdrv->reset &&
	    ippdrv->reset(ippdrv->dev)) {
		return -EINVAL;
	}

	/* set source,destination operations */
	for_each_ipp_ops(i) {
		struct drm_exynos_ipp_config *config =
			&property->config[i];

		ops = ippdrv->ops[i];
		if (!ops || !config) {
			DRM_ERROR("not support ops and config.\n");
			return -EINVAL;
		}

		/* set format */
		if (ops->set_fmt) {
			ret = ops->set_fmt(ippdrv->dev, config->fmt);
			if (ret)
				return ret;
		}

		/* set transform for rotation, flip */
		if (ops->set_transf) {
			ret = ops->set_transf(ippdrv->dev, config->degree,
				config->flip, &swap);
			if (ret)
				return ret;
		}

		/* set size */
		if (ops->set_size) {
			ret = ops->set_size(ippdrv->dev, swap, &config->pos,
				&config->sz);
			if (ret)
				return ret;
		}
	}

	return 0;
}

static int ipp_start_property(struct exynos_drm_ippdrv *ippdrv,
		struct drm_exynos_ipp_cmd_node *c_node)
{
	struct drm_exynos_ipp_mem_node *m_node;
	struct drm_exynos_ipp_property *property = &c_node->property;
	struct list_head *head;
	int ret, i;

	DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);

	/* store command info in ippdrv */
	ippdrv->c_node = c_node;

	mutex_lock(&c_node->mem_lock);
	if (!ipp_check_mem_list(c_node)) {
		DRM_DEBUG_KMS("empty memory.\n");
		ret = -ENOMEM;
		goto err_unlock;
	}

	/* set current property in ippdrv */
	ret = ipp_set_property(ippdrv, property);
	if (ret) {
		DRM_ERROR("failed to set property.\n");
		ippdrv->c_node = NULL;
		goto err_unlock;
	}

	/* check command */
	switch (property->cmd) {
	case IPP_CMD_M2M:
		for_each_ipp_ops(i) {
			/* source/destination memory list */
			head = &c_node->mem_list[i];

			m_node = list_first_entry(head,
				struct drm_exynos_ipp_mem_node, list);

			DRM_DEBUG_KMS("m_node[0x%x]\n", (int)m_node);

			ret = ipp_set_mem_node(ippdrv, c_node, m_node);
			if (ret) {
				DRM_ERROR("failed to set m node.\n");
				goto err_unlock;
			}
		}
		break;
	case IPP_CMD_WB:
		/* destination memory list */
		head = &c_node->mem_list[EXYNOS_DRM_OPS_DST];

		list_for_each_entry(m_node, head, list) {
			ret = ipp_set_mem_node(ippdrv, c_node, m_node);
			if (ret) {
				DRM_ERROR("failed to set m node.\n");
				goto err_unlock;
			}
		}
		break;
	case IPP_CMD_OUTPUT:
		/* source memory list */
		head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];

		list_for_each_entry(m_node, head, list) {
			ret = ipp_set_mem_node(ippdrv, c_node, m_node);
			if (ret) {
				DRM_ERROR("failed to set m node.\n");
				goto err_unlock;
			}
		}
		break;
	default:
		DRM_ERROR("invalid operations.\n");
		ret = -EINVAL;
		goto err_unlock;
	}
	mutex_unlock(&c_node->mem_lock);

	DRM_DEBUG_KMS("cmd[%d]\n", property->cmd);

	/* start operations */
	if (ippdrv->start) {
		ret = ippdrv->start(ippdrv->dev, property->cmd);
		if (ret) {
			DRM_ERROR("failed to start ops.\n");
			ippdrv->c_node = NULL;
			return ret;
		}
	}

	return 0;

err_unlock:
	mutex_unlock(&c_node->mem_lock);
	ippdrv->c_node = NULL;
	return ret;
}

static int ipp_stop_property(struct drm_device *drm_dev,
		struct exynos_drm_ippdrv *ippdrv,
		struct drm_exynos_ipp_cmd_node *c_node)
{
	struct drm_exynos_ipp_property *property = &c_node->property;
	int i;

	DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);

	/* stop operations */
	if (ippdrv->stop)
		ippdrv->stop(ippdrv->dev, property->cmd);

	/* check command */
	switch (property->cmd) {
	case IPP_CMD_M2M:
		for_each_ipp_ops(i)
			ipp_clean_mem_nodes(drm_dev, c_node, i);
		break;
	case IPP_CMD_WB:
		ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_DST);
		break;
	case IPP_CMD_OUTPUT:
		ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_SRC);
		break;
	default:
		DRM_ERROR("invalid operations.\n");
		return -EINVAL;
	}

	return 0;
}

void ipp_sched_cmd(struct work_struct *work)
{
	struct drm_exynos_ipp_cmd_work *cmd_work =
		container_of(work, struct drm_exynos_ipp_cmd_work, work);
	struct exynos_drm_ippdrv *ippdrv;
	struct drm_exynos_ipp_cmd_node *c_node;
	struct drm_exynos_ipp_property *property;
	int ret;

	ippdrv = cmd_work->ippdrv;
	if (!ippdrv) {
		DRM_ERROR("invalid ippdrv list.\n");
		return;
	}

	c_node = cmd_work->c_node;
	if (!c_node) {
		DRM_ERROR("invalid command node list.\n");
		return;
	}

	mutex_lock(&c_node->lock);

	property = &c_node->property;

	switch (cmd_work->ctrl) {
	case IPP_CTRL_PLAY:
	case IPP_CTRL_RESUME:
		ret = ipp_start_property(ippdrv, c_node);
		if (ret) {
			DRM_ERROR("failed to start property:prop_id[%d]\n",
				c_node->property.prop_id);
			goto err_unlock;
		}

		/*
		 * M2M case supports wait_completion of transfer.
		 * because M2M case supports single unit operation
		 * with multiple queue.
		 * M2M need to wait completion of data transfer.
		 */
		if (ipp_is_m2m_cmd(property->cmd)) {
			if (!wait_for_completion_timeout
			    (&c_node->start_complete, msecs_to_jiffies(200))) {
				DRM_ERROR("timeout event:prop_id[%d]\n",
					c_node->property.prop_id);
				goto err_unlock;
			}
		}
		break;
	case IPP_CTRL_STOP:
	case IPP_CTRL_PAUSE:
		ret = ipp_stop_property(ippdrv->drm_dev, ippdrv,
			c_node);
		if (ret) {
			DRM_ERROR("failed to stop property.\n");
			goto err_unlock;
		}

		complete(&c_node->stop_complete);
		break;
	default:
		DRM_ERROR("unknown control type\n");
		break;
	}

	DRM_DEBUG_KMS("ctrl[%d] done.\n", cmd_work->ctrl);

err_unlock:
	mutex_unlock(&c_node->lock);
}

static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv,
		struct drm_exynos_ipp_cmd_node *c_node, int *buf_id)
{
	struct drm_device *drm_dev = ippdrv->drm_dev;
	struct drm_exynos_ipp_property *property = &c_node->property;
	struct drm_exynos_ipp_mem_node *m_node;
	struct drm_exynos_ipp_queue_buf qbuf;
	struct drm_exynos_ipp_send_event *e;
	struct list_head *head;
	struct timeval now;
	unsigned long flags;
	u32 tbuf_id[EXYNOS_DRM_OPS_MAX] = {0, };
	int ret, i;

	for_each_ipp_ops(i)
		DRM_DEBUG_KMS("%s buf_id[%d]\n", i ? "dst" : "src", buf_id[i]);

	if (!drm_dev) {
		DRM_ERROR("failed to get drm_dev.\n");
		return -EINVAL;
	}

	if (!property) {
		DRM_ERROR("failed to get property.\n");
		return -EINVAL;
	}

	mutex_lock(&c_node->event_lock);
	if (list_empty(&c_node->event_list)) {
		DRM_DEBUG_KMS("event list is empty.\n");
		ret = 0;
		goto err_event_unlock;
	}

	mutex_lock(&c_node->mem_lock);
	if (!ipp_check_mem_list(c_node)) {
		DRM_DEBUG_KMS("empty memory.\n");
		ret = 0;
		goto err_mem_unlock;
	}

	/* check command */
	switch (property->cmd) {
	case IPP_CMD_M2M:
		for_each_ipp_ops(i) {
			/* source/destination memory list */
			head = &c_node->mem_list[i];

			m_node = list_first_entry(head,
				struct drm_exynos_ipp_mem_node, list);

			tbuf_id[i] = m_node->buf_id;
			DRM_DEBUG_KMS("%s buf_id[%d]\n",
				i ? "dst" : "src", tbuf_id[i]);

			ret = ipp_put_mem_node(drm_dev, c_node, m_node);
			if (ret)
				DRM_ERROR("failed to put m_node.\n");
		}
		break;
	case IPP_CMD_WB:
		/* clear buf for finding */
		memset(&qbuf, 0x0, sizeof(qbuf));
		qbuf.ops_id = EXYNOS_DRM_OPS_DST;
		qbuf.buf_id = buf_id[EXYNOS_DRM_OPS_DST];

		/* get memory node entry */
		m_node = ipp_find_mem_node(c_node, &qbuf);
		if (!m_node) {
			DRM_ERROR("empty memory node.\n");
			ret = -ENOMEM;
			goto err_mem_unlock;
		}

		tbuf_id[EXYNOS_DRM_OPS_DST] = m_node->buf_id;

		ret = ipp_put_mem_node(drm_dev, c_node, m_node);
		if (ret)
			DRM_ERROR("failed to put m_node.\n");
		break;
	case IPP_CMD_OUTPUT:
		/* source memory list */
		head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];

		m_node = list_first_entry(head,
			struct drm_exynos_ipp_mem_node, list);

		tbuf_id[EXYNOS_DRM_OPS_SRC] = m_node->buf_id;

		ret = ipp_put_mem_node(drm_dev, c_node, m_node);
		if (ret)
			DRM_ERROR("failed to put m_node.\n");
		break;
	default:
		DRM_ERROR("invalid operations.\n");
		ret = -EINVAL;
		goto err_mem_unlock;
	}
	mutex_unlock(&c_node->mem_lock);

	if (tbuf_id[EXYNOS_DRM_OPS_DST] != buf_id[EXYNOS_DRM_OPS_DST])
		DRM_ERROR("failed to match buf_id[%d %d]prop_id[%d]\n",
			tbuf_id[1], buf_id[1], property->prop_id);

	/*
	 * command node have event list of destination buffer
	 * If destination buffer enqueue to mem list,
	 * then we make event and link to event list tail.
	 * so, we get first event for first enqueued buffer.
	 */
	e = list_first_entry(&c_node->event_list,
		struct drm_exynos_ipp_send_event, base.link);

	do_gettimeofday(&now);
	DRM_DEBUG_KMS("tv_sec[%ld]tv_usec[%ld]\n", now.tv_sec, now.tv_usec);
	e->event.tv_sec = now.tv_sec;
	e->event.tv_usec = now.tv_usec;
	e->event.prop_id = property->prop_id;

	/* set buffer id about source destination */
	for_each_ipp_ops(i)
		e->event.buf_id[i] = tbuf_id[i];

	spin_lock_irqsave(&drm_dev->event_lock, flags);
	list_move_tail(&e->base.link, &e->base.file_priv->event_list);
	wake_up_interruptible(&e->base.file_priv->event_wait);
	spin_unlock_irqrestore(&drm_dev->event_lock, flags);
	mutex_unlock(&c_node->event_lock);

	DRM_DEBUG_KMS("done cmd[%d]prop_id[%d]buf_id[%d]\n",
		property->cmd, property->prop_id, tbuf_id[EXYNOS_DRM_OPS_DST]);

	return 0;

err_mem_unlock:
	mutex_unlock(&c_node->mem_lock);
err_event_unlock:
	mutex_unlock(&c_node->event_lock);
	return ret;
}

void ipp_sched_event(struct work_struct *work)
{
	struct drm_exynos_ipp_event_work *event_work =
		container_of(work, struct drm_exynos_ipp_event_work, work);
	struct exynos_drm_ippdrv *ippdrv;
	struct drm_exynos_ipp_cmd_node *c_node;
	int ret;

	if (!event_work) {
		DRM_ERROR("failed to get event_work.\n");
		return;
	}

	DRM_DEBUG_KMS("buf_id[%d]\n", event_work->buf_id[EXYNOS_DRM_OPS_DST]);

	ippdrv = event_work->ippdrv;
	if (!ippdrv) {
		DRM_ERROR("failed to get ipp driver.\n");
		return;
	}

	c_node = ippdrv->c_node;
	if (!c_node) {
		DRM_ERROR("failed to get command node.\n");
		return;
	}

	/*
	 * IPP supports command thread, event thread synchronization.
	 * If IPP close immediately from user land, then IPP make
	 * synchronization with command thread, so make complete event.
	 * or going out operations.
	 */
	if (c_node->state != IPP_STATE_START) {
		DRM_DEBUG_KMS("bypass state[%d]prop_id[%d]\n",
			c_node->state, c_node->property.prop_id);
		goto err_completion;
	}

	ret = ipp_send_event(ippdrv, c_node, event_work->buf_id);
	if (ret) {
		DRM_ERROR("failed to send event.\n");
		goto err_completion;
	}

err_completion:
	if (ipp_is_m2m_cmd(c_node->property.cmd))
		complete(&c_node->start_complete);
}

static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
{
	struct ipp_context *ctx = get_ipp_context(dev);
	struct exynos_drm_ippdrv *ippdrv;
	int ret, count = 0;

	/* get ipp driver entry */
	list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
		ippdrv->drm_dev = drm_dev;

		ret = ipp_create_id(&ctx->ipp_idr, &ctx->ipp_lock, ippdrv);
		if (ret < 0) {
			DRM_ERROR("failed to create id.\n");
			goto err;
		}
		ippdrv->prop_list.ipp_id = ret;

		DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]ipp_id[%d]\n",
			count++, (int)ippdrv, ret);

		/* store parent device for node */
		ippdrv->parent_dev = dev;

		/* store event work queue and handler */
		ippdrv->event_workq = ctx->event_workq;
		ippdrv->sched_event = ipp_sched_event;
		INIT_LIST_HEAD(&ippdrv->cmd_list);
		mutex_init(&ippdrv->cmd_lock);

		if (is_drm_iommu_supported(drm_dev)) {
			ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
			if (ret) {
				DRM_ERROR("failed to activate iommu\n");
				goto err;
			}
		}
	}

	return 0;

err:
	/* get ipp driver entry */
	list_for_each_entry_continue_reverse(ippdrv, &exynos_drm_ippdrv_list,
						drv_list) {
		if (is_drm_iommu_supported(drm_dev))
			drm_iommu_detach_device(drm_dev, ippdrv->dev);

		ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
				ippdrv->prop_list.ipp_id);
	}

	return ret;
}

static void ipp_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
	struct exynos_drm_ippdrv *ippdrv, *t;
	struct ipp_context *ctx = get_ipp_context(dev);

	/* get ipp driver entry */
	list_for_each_entry_safe(ippdrv, t, &exynos_drm_ippdrv_list, drv_list) {
		if (is_drm_iommu_supported(drm_dev))
			drm_iommu_detach_device(drm_dev, ippdrv->dev);

		ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
				ippdrv->prop_list.ipp_id);

		ippdrv->drm_dev = NULL;
		exynos_drm_ippdrv_unregister(ippdrv);
	}
}

static int ipp_subdrv_open(struct drm_device *drm_dev, struct device *dev,
		struct drm_file *file)
{
	struct drm_exynos_file_private *file_priv = file->driver_priv;

	file_priv->ipp_dev = dev;

	DRM_DEBUG_KMS("done priv[0x%x]\n", (int)dev);

	return 0;
}

static void ipp_subdrv_close(struct drm_device *drm_dev, struct device *dev,
		struct drm_file *file)
{
	struct exynos_drm_ippdrv *ippdrv = NULL;
	struct ipp_context *ctx = get_ipp_context(dev);
	struct drm_exynos_ipp_cmd_node *c_node, *tc_node;
	int count = 0;

	list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
		mutex_lock(&ippdrv->cmd_lock);
		list_for_each_entry_safe(c_node, tc_node,
			&ippdrv->cmd_list, list) {
			DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n",
				count++, (int)ippdrv);

			if (c_node->filp == file) {
				/*
				 * userland goto unnormal state. process killed.
				 * and close the file.
				 * so, IPP didn't called stop cmd ctrl.
				 * so, we are make stop operation in this state.
				 */
				if (c_node->state == IPP_STATE_START) {
					ipp_stop_property(drm_dev, ippdrv,
						c_node);
					c_node->state = IPP_STATE_STOP;
				}

				ippdrv->dedicated = false;
				ipp_clean_cmd_node(ctx, c_node);
				if (list_empty(&ippdrv->cmd_list))
					pm_runtime_put_sync(ippdrv->dev);
			}
		}
		mutex_unlock(&ippdrv->cmd_lock);
	}

	return;
}

static int ipp_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ipp_context *ctx;
	struct exynos_drm_subdrv *subdrv;
	int ret;

	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	mutex_init(&ctx->ipp_lock);
	mutex_init(&ctx->prop_lock);

	idr_init(&ctx->ipp_idr);
	idr_init(&ctx->prop_idr);

	/*
	 * create single thread for ipp event
	 * IPP supports event thread for IPP drivers.
	 * IPP driver send event_work to this thread.
	 * and IPP event thread send event to user process.
	 */
	ctx->event_workq = create_singlethread_workqueue("ipp_event");
	if (!ctx->event_workq) {
		dev_err(dev, "failed to create event workqueue\n");
		return -EINVAL;
	}

	/*
	 * create single thread for ipp command
	 * IPP supports command thread for user process.
	 * user process make command node using set property ioctl.
	 * and make start_work and send this work to command thread.
	 * and then this command thread start property.
	 */
	ctx->cmd_workq = create_singlethread_workqueue("ipp_cmd");
	if (!ctx->cmd_workq) {
		dev_err(dev, "failed to create cmd workqueue\n");
		ret = -EINVAL;
		goto err_event_workq;
	}

	/* set sub driver informations */
	subdrv = &ctx->subdrv;
	subdrv->dev = dev;
	subdrv->probe = ipp_subdrv_probe;
	subdrv->remove = ipp_subdrv_remove;
	subdrv->open = ipp_subdrv_open;
	subdrv->close = ipp_subdrv_close;

	platform_set_drvdata(pdev, ctx);

	ret = exynos_drm_subdrv_register(subdrv);
	if (ret < 0) {
		DRM_ERROR("failed to register drm ipp device.\n");
		goto err_cmd_workq;
	}

	dev_info(dev, "drm ipp registered successfully.\n");

	return 0;

err_cmd_workq:
	destroy_workqueue(ctx->cmd_workq);
err_event_workq:
	destroy_workqueue(ctx->event_workq);
	return ret;
}

static int ipp_remove(struct platform_device *pdev)
{
	struct ipp_context *ctx = platform_get_drvdata(pdev);

	/* unregister sub driver */
	exynos_drm_subdrv_unregister(&ctx->subdrv);

	/* remove,destroy ipp idr */
	idr_destroy(&ctx->ipp_idr);
	idr_destroy(&ctx->prop_idr);

	mutex_destroy(&ctx->ipp_lock);
	mutex_destroy(&ctx->prop_lock);

	/* destroy command, event work queue */
	destroy_workqueue(ctx->cmd_workq);
	destroy_workqueue(ctx->event_workq);

	return 0;
}

struct platform_driver ipp_driver = {
	.probe		= ipp_probe,
	.remove		= ipp_remove,
	.driver		= {
		.name	= "exynos-drm-ipp",
		.owner	= THIS_MODULE,
	},
};