summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/exynos/exynos_drm_rotator.c
blob: 7b901688defa78f5e2d6ee1853e45f71f8e4bf2b (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
/*
 * Copyright (C) 2012 Samsung Electronics Co.Ltd
 * Authors:
 *	YoungJun Cho <yj44.cho@samsung.com>
 *	Eunchul Kim <chulspro.kim@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundationr
 */

#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>

#include <drm/drmP.h>
#include <drm/exynos_drm.h>
#include "regs-rotator.h"
#include "exynos_drm.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_ipp.h"

/*
 * Rotator supports image crop/rotator and input/output DMA operations.
 * input DMA reads image data from the memory.
 * output DMA writes image data to memory.
 *
 * M2M operation : supports crop/scale/rotation/csc so on.
 * Memory ----> Rotator H/W ----> Memory.
 */

/*
 * TODO
 * 1. check suspend/resume api if needed.
 * 2. need to check use case platform_device_id.
 * 3. check src/dst size with, height.
 * 4. need to add supported list in prop_list.
 */

#define get_rot_context(dev)	platform_get_drvdata(to_platform_device(dev))
#define get_ctx_from_ippdrv(ippdrv)	container_of(ippdrv,\
					struct rot_context, ippdrv);
#define rot_read(offset)		readl(rot->regs + (offset))
#define rot_write(cfg, offset)	writel(cfg, rot->regs + (offset))

enum rot_irq_status {
	ROT_IRQ_STATUS_COMPLETE	= 8,
	ROT_IRQ_STATUS_ILLEGAL	= 9,
};

/*
 * A structure of limitation.
 *
 * @min_w: minimum width.
 * @min_h: minimum height.
 * @max_w: maximum width.
 * @max_h: maximum height.
 * @align: align size.
 */
struct rot_limit {
	u32	min_w;
	u32	min_h;
	u32	max_w;
	u32	max_h;
	u32	align;
};

/*
 * A structure of limitation table.
 *
 * @ycbcr420_2p: case of YUV.
 * @rgb888: case of RGB.
 */
struct rot_limit_table {
	struct rot_limit	ycbcr420_2p;
	struct rot_limit	rgb888;
};

/*
 * A structure of rotator context.
 * @ippdrv: prepare initialization using ippdrv.
 * @regs_res: register resources.
 * @regs: memory mapped io registers.
 * @clock: rotator gate clock.
 * @limit_tbl: limitation of rotator.
 * @irq: irq number.
 * @cur_buf_id: current operation buffer id.
 * @suspended: suspended state.
 */
struct rot_context {
	struct exynos_drm_ippdrv	ippdrv;
	struct resource	*regs_res;
	void __iomem	*regs;
	struct clk	*clock;
	struct rot_limit_table	*limit_tbl;
	int	irq;
	int	cur_buf_id[EXYNOS_DRM_OPS_MAX];
	bool	suspended;
};

static void rotator_reg_set_irq(struct rot_context *rot, bool enable)
{
	u32 val = rot_read(ROT_CONFIG);

	if (enable == true)
		val |= ROT_CONFIG_IRQ;
	else
		val &= ~ROT_CONFIG_IRQ;

	rot_write(val, ROT_CONFIG);
}

static u32 rotator_reg_get_fmt(struct rot_context *rot)
{
	u32 val = rot_read(ROT_CONTROL);

	val &= ROT_CONTROL_FMT_MASK;

	return val;
}

static enum rot_irq_status rotator_reg_get_irq_status(struct rot_context *rot)
{
	u32 val = rot_read(ROT_STATUS);

	val = ROT_STATUS_IRQ(val);

	if (val == ROT_STATUS_IRQ_VAL_COMPLETE)
		return ROT_IRQ_STATUS_COMPLETE;

	return ROT_IRQ_STATUS_ILLEGAL;
}

static irqreturn_t rotator_irq_handler(int irq, void *arg)
{
	struct rot_context *rot = arg;
	struct exynos_drm_ippdrv *ippdrv = &rot->ippdrv;
	struct drm_exynos_ipp_cmd_node *c_node = ippdrv->c_node;
	struct drm_exynos_ipp_event_work *event_work = c_node->event_work;
	enum rot_irq_status irq_status;
	u32 val;

	/* Get execution result */
	irq_status = rotator_reg_get_irq_status(rot);

	/* clear status */
	val = rot_read(ROT_STATUS);
	val |= ROT_STATUS_IRQ_PENDING((u32)irq_status);
	rot_write(val, ROT_STATUS);

	if (irq_status == ROT_IRQ_STATUS_COMPLETE) {
		event_work->ippdrv = ippdrv;
		event_work->buf_id[EXYNOS_DRM_OPS_DST] =
			rot->cur_buf_id[EXYNOS_DRM_OPS_DST];
		queue_work(ippdrv->event_workq,
			(struct work_struct *)event_work);
	} else
		DRM_ERROR("the SFR is set illegally\n");

	return IRQ_HANDLED;
}

static void rotator_align_size(struct rot_context *rot, u32 fmt, u32 *hsize,
		u32 *vsize)
{
	struct rot_limit_table *limit_tbl = rot->limit_tbl;
	struct rot_limit *limit;
	u32 mask, val;

	/* Get size limit */
	if (fmt == ROT_CONTROL_FMT_RGB888)
		limit = &limit_tbl->rgb888;
	else
		limit = &limit_tbl->ycbcr420_2p;

	/* Get mask for rounding to nearest aligned val */
	mask = ~((1 << limit->align) - 1);

	/* Set aligned width */
	val = ROT_ALIGN(*hsize, limit->align, mask);
	if (val < limit->min_w)
		*hsize = ROT_MIN(limit->min_w, mask);
	else if (val > limit->max_w)
		*hsize = ROT_MAX(limit->max_w, mask);
	else
		*hsize = val;

	/* Set aligned height */
	val = ROT_ALIGN(*vsize, limit->align, mask);
	if (val < limit->min_h)
		*vsize = ROT_MIN(limit->min_h, mask);
	else if (val > limit->max_h)
		*vsize = ROT_MAX(limit->max_h, mask);
	else
		*vsize = val;
}

static int rotator_src_set_fmt(struct device *dev, u32 fmt)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	u32 val;

	val = rot_read(ROT_CONTROL);
	val &= ~ROT_CONTROL_FMT_MASK;

	switch (fmt) {
	case DRM_FORMAT_NV12:
		val |= ROT_CONTROL_FMT_YCBCR420_2P;
		break;
	case DRM_FORMAT_XRGB8888:
		val |= ROT_CONTROL_FMT_RGB888;
		break;
	default:
		DRM_ERROR("invalid image format\n");
		return -EINVAL;
	}

	rot_write(val, ROT_CONTROL);

	return 0;
}

static inline bool rotator_check_reg_fmt(u32 fmt)
{
	if ((fmt == ROT_CONTROL_FMT_YCBCR420_2P) ||
	    (fmt == ROT_CONTROL_FMT_RGB888))
		return true;

	return false;
}

static int rotator_src_set_size(struct device *dev, int swap,
		struct drm_exynos_pos *pos,
		struct drm_exynos_sz *sz)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	u32 fmt, hsize, vsize;
	u32 val;

	/* Get format */
	fmt = rotator_reg_get_fmt(rot);
	if (!rotator_check_reg_fmt(fmt)) {
		DRM_ERROR("invalid format.\n");
		return -EINVAL;
	}

	/* Align buffer size */
	hsize = sz->hsize;
	vsize = sz->vsize;
	rotator_align_size(rot, fmt, &hsize, &vsize);

	/* Set buffer size configuration */
	val = ROT_SET_BUF_SIZE_H(vsize) | ROT_SET_BUF_SIZE_W(hsize);
	rot_write(val, ROT_SRC_BUF_SIZE);

	/* Set crop image position configuration */
	val = ROT_CROP_POS_Y(pos->y) | ROT_CROP_POS_X(pos->x);
	rot_write(val, ROT_SRC_CROP_POS);
	val = ROT_SRC_CROP_SIZE_H(pos->h) | ROT_SRC_CROP_SIZE_W(pos->w);
	rot_write(val, ROT_SRC_CROP_SIZE);

	return 0;
}

static int rotator_src_set_addr(struct device *dev,
		struct drm_exynos_ipp_buf_info *buf_info,
		u32 buf_id, enum drm_exynos_ipp_buf_type buf_type)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	dma_addr_t addr[EXYNOS_DRM_PLANAR_MAX];
	u32 val, fmt, hsize, vsize;
	int i;

	/* Set current buf_id */
	rot->cur_buf_id[EXYNOS_DRM_OPS_SRC] = buf_id;

	switch (buf_type) {
	case IPP_BUF_ENQUEUE:
		/* Set address configuration */
		for_each_ipp_planar(i)
			addr[i] = buf_info->base[i];

		/* Get format */
		fmt = rotator_reg_get_fmt(rot);
		if (!rotator_check_reg_fmt(fmt)) {
			DRM_ERROR("invalid format.\n");
			return -EINVAL;
		}

		/* Re-set cb planar for NV12 format */
		if ((fmt == ROT_CONTROL_FMT_YCBCR420_2P) &&
		    !addr[EXYNOS_DRM_PLANAR_CB]) {

			val = rot_read(ROT_SRC_BUF_SIZE);
			hsize = ROT_GET_BUF_SIZE_W(val);
			vsize = ROT_GET_BUF_SIZE_H(val);

			/* Set cb planar */
			addr[EXYNOS_DRM_PLANAR_CB] =
				addr[EXYNOS_DRM_PLANAR_Y] + hsize * vsize;
		}

		for_each_ipp_planar(i)
			rot_write(addr[i], ROT_SRC_BUF_ADDR(i));
		break;
	case IPP_BUF_DEQUEUE:
		for_each_ipp_planar(i)
			rot_write(0x0, ROT_SRC_BUF_ADDR(i));
		break;
	default:
		/* Nothing to do */
		break;
	}

	return 0;
}

static int rotator_dst_set_transf(struct device *dev,
		enum drm_exynos_degree degree,
		enum drm_exynos_flip flip, bool *swap)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	u32 val;

	/* Set transform configuration */
	val = rot_read(ROT_CONTROL);
	val &= ~ROT_CONTROL_FLIP_MASK;

	switch (flip) {
	case EXYNOS_DRM_FLIP_VERTICAL:
		val |= ROT_CONTROL_FLIP_VERTICAL;
		break;
	case EXYNOS_DRM_FLIP_HORIZONTAL:
		val |= ROT_CONTROL_FLIP_HORIZONTAL;
		break;
	default:
		/* Flip None */
		break;
	}

	val &= ~ROT_CONTROL_ROT_MASK;

	switch (degree) {
	case EXYNOS_DRM_DEGREE_90:
		val |= ROT_CONTROL_ROT_90;
		break;
	case EXYNOS_DRM_DEGREE_180:
		val |= ROT_CONTROL_ROT_180;
		break;
	case EXYNOS_DRM_DEGREE_270:
		val |= ROT_CONTROL_ROT_270;
		break;
	default:
		/* Rotation 0 Degree */
		break;
	}

	rot_write(val, ROT_CONTROL);

	/* Check degree for setting buffer size swap */
	if ((degree == EXYNOS_DRM_DEGREE_90) ||
	    (degree == EXYNOS_DRM_DEGREE_270))
		*swap = true;
	else
		*swap = false;

	return 0;
}

static int rotator_dst_set_size(struct device *dev, int swap,
		struct drm_exynos_pos *pos,
		struct drm_exynos_sz *sz)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	u32 val, fmt, hsize, vsize;

	/* Get format */
	fmt = rotator_reg_get_fmt(rot);
	if (!rotator_check_reg_fmt(fmt)) {
		DRM_ERROR("invalid format.\n");
		return -EINVAL;
	}

	/* Align buffer size */
	hsize = sz->hsize;
	vsize = sz->vsize;
	rotator_align_size(rot, fmt, &hsize, &vsize);

	/* Set buffer size configuration */
	val = ROT_SET_BUF_SIZE_H(vsize) | ROT_SET_BUF_SIZE_W(hsize);
	rot_write(val, ROT_DST_BUF_SIZE);

	/* Set crop image position configuration */
	val = ROT_CROP_POS_Y(pos->y) | ROT_CROP_POS_X(pos->x);
	rot_write(val, ROT_DST_CROP_POS);

	return 0;
}

static int rotator_dst_set_addr(struct device *dev,
		struct drm_exynos_ipp_buf_info *buf_info,
		u32 buf_id, enum drm_exynos_ipp_buf_type buf_type)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	dma_addr_t addr[EXYNOS_DRM_PLANAR_MAX];
	u32 val, fmt, hsize, vsize;
	int i;

	/* Set current buf_id */
	rot->cur_buf_id[EXYNOS_DRM_OPS_DST] = buf_id;

	switch (buf_type) {
	case IPP_BUF_ENQUEUE:
		/* Set address configuration */
		for_each_ipp_planar(i)
			addr[i] = buf_info->base[i];

		/* Get format */
		fmt = rotator_reg_get_fmt(rot);
		if (!rotator_check_reg_fmt(fmt)) {
			DRM_ERROR("invalid format.\n");
			return -EINVAL;
		}

		/* Re-set cb planar for NV12 format */
		if ((fmt == ROT_CONTROL_FMT_YCBCR420_2P) &&
		    !addr[EXYNOS_DRM_PLANAR_CB]) {
			/* Get buf size */
			val = rot_read(ROT_DST_BUF_SIZE);

			hsize = ROT_GET_BUF_SIZE_W(val);
			vsize = ROT_GET_BUF_SIZE_H(val);

			/* Set cb planar */
			addr[EXYNOS_DRM_PLANAR_CB] =
				addr[EXYNOS_DRM_PLANAR_Y] + hsize * vsize;
		}

		for_each_ipp_planar(i)
			rot_write(addr[i], ROT_DST_BUF_ADDR(i));
		break;
	case IPP_BUF_DEQUEUE:
		for_each_ipp_planar(i)
			rot_write(0x0, ROT_DST_BUF_ADDR(i));
		break;
	default:
		/* Nothing to do */
		break;
	}

	return 0;
}

static struct exynos_drm_ipp_ops rot_src_ops = {
	.set_fmt	=	rotator_src_set_fmt,
	.set_size	=	rotator_src_set_size,
	.set_addr	=	rotator_src_set_addr,
};

static struct exynos_drm_ipp_ops rot_dst_ops = {
	.set_transf	=	rotator_dst_set_transf,
	.set_size	=	rotator_dst_set_size,
	.set_addr	=	rotator_dst_set_addr,
};

static int rotator_init_prop_list(struct exynos_drm_ippdrv *ippdrv)
{
	struct drm_exynos_ipp_prop_list *prop_list;

	prop_list = devm_kzalloc(ippdrv->dev, sizeof(*prop_list), GFP_KERNEL);
	if (!prop_list)
		return -ENOMEM;

	prop_list->version = 1;
	prop_list->flip = (1 << EXYNOS_DRM_FLIP_VERTICAL) |
				(1 << EXYNOS_DRM_FLIP_HORIZONTAL);
	prop_list->degree = (1 << EXYNOS_DRM_DEGREE_0) |
				(1 << EXYNOS_DRM_DEGREE_90) |
				(1 << EXYNOS_DRM_DEGREE_180) |
				(1 << EXYNOS_DRM_DEGREE_270);
	prop_list->csc = 0;
	prop_list->crop = 0;
	prop_list->scale = 0;

	ippdrv->prop_list = prop_list;

	return 0;
}

static inline bool rotator_check_drm_fmt(u32 fmt)
{
	switch (fmt) {
	case DRM_FORMAT_XRGB8888:
	case DRM_FORMAT_NV12:
		return true;
	default:
		DRM_DEBUG_KMS("not support format\n");
		return false;
	}
}

static inline bool rotator_check_drm_flip(enum drm_exynos_flip flip)
{
	switch (flip) {
	case EXYNOS_DRM_FLIP_NONE:
	case EXYNOS_DRM_FLIP_VERTICAL:
	case EXYNOS_DRM_FLIP_HORIZONTAL:
	case EXYNOS_DRM_FLIP_BOTH:
		return true;
	default:
		DRM_DEBUG_KMS("invalid flip\n");
		return false;
	}
}

static int rotator_ippdrv_check_property(struct device *dev,
		struct drm_exynos_ipp_property *property)
{
	struct drm_exynos_ipp_config *src_config =
					&property->config[EXYNOS_DRM_OPS_SRC];
	struct drm_exynos_ipp_config *dst_config =
					&property->config[EXYNOS_DRM_OPS_DST];
	struct drm_exynos_pos *src_pos = &src_config->pos;
	struct drm_exynos_pos *dst_pos = &dst_config->pos;
	struct drm_exynos_sz *src_sz = &src_config->sz;
	struct drm_exynos_sz *dst_sz = &dst_config->sz;
	bool swap = false;

	/* Check format configuration */
	if (src_config->fmt != dst_config->fmt) {
		DRM_DEBUG_KMS("not support csc feature\n");
		return -EINVAL;
	}

	if (!rotator_check_drm_fmt(dst_config->fmt)) {
		DRM_DEBUG_KMS("invalid format\n");
		return -EINVAL;
	}

	/* Check transform configuration */
	if (src_config->degree != EXYNOS_DRM_DEGREE_0) {
		DRM_DEBUG_KMS("not support source-side rotation\n");
		return -EINVAL;
	}

	switch (dst_config->degree) {
	case EXYNOS_DRM_DEGREE_90:
	case EXYNOS_DRM_DEGREE_270:
		swap = true;
	case EXYNOS_DRM_DEGREE_0:
	case EXYNOS_DRM_DEGREE_180:
		/* No problem */
		break;
	default:
		DRM_DEBUG_KMS("invalid degree\n");
		return -EINVAL;
	}

	if (src_config->flip != EXYNOS_DRM_FLIP_NONE) {
		DRM_DEBUG_KMS("not support source-side flip\n");
		return -EINVAL;
	}

	if (!rotator_check_drm_flip(dst_config->flip)) {
		DRM_DEBUG_KMS("invalid flip\n");
		return -EINVAL;
	}

	/* Check size configuration */
	if ((src_pos->x + src_pos->w > src_sz->hsize) ||
		(src_pos->y + src_pos->h > src_sz->vsize)) {
		DRM_DEBUG_KMS("out of source buffer bound\n");
		return -EINVAL;
	}

	if (swap) {
		if ((dst_pos->x + dst_pos->h > dst_sz->vsize) ||
			(dst_pos->y + dst_pos->w > dst_sz->hsize)) {
			DRM_DEBUG_KMS("out of destination buffer bound\n");
			return -EINVAL;
		}

		if ((src_pos->w != dst_pos->h) || (src_pos->h != dst_pos->w)) {
			DRM_DEBUG_KMS("not support scale feature\n");
			return -EINVAL;
		}
	} else {
		if ((dst_pos->x + dst_pos->w > dst_sz->hsize) ||
			(dst_pos->y + dst_pos->h > dst_sz->vsize)) {
			DRM_DEBUG_KMS("out of destination buffer bound\n");
			return -EINVAL;
		}

		if ((src_pos->w != dst_pos->w) || (src_pos->h != dst_pos->h)) {
			DRM_DEBUG_KMS("not support scale feature\n");
			return -EINVAL;
		}
	}

	return 0;
}

static int rotator_ippdrv_start(struct device *dev, enum drm_exynos_ipp_cmd cmd)
{
	struct rot_context *rot = dev_get_drvdata(dev);
	u32 val;

	if (rot->suspended) {
		DRM_ERROR("suspended state\n");
		return -EPERM;
	}

	if (cmd != IPP_CMD_M2M) {
		DRM_ERROR("not support cmd: %d\n", cmd);
		return -EINVAL;
	}

	/* Set interrupt enable */
	rotator_reg_set_irq(rot, true);

	val = rot_read(ROT_CONTROL);
	val |= ROT_CONTROL_START;

	rot_write(val, ROT_CONTROL);

	return 0;
}

static struct rot_limit_table rot_limit_tbl_4210 = {
	.ycbcr420_2p = {
		.min_w = 32,
		.min_h = 32,
		.max_w = SZ_64K,
		.max_h = SZ_64K,
		.align = 3,
	},
	.rgb888 = {
		.min_w = 8,
		.min_h = 8,
		.max_w = SZ_16K,
		.max_h = SZ_16K,
		.align = 2,
	},
};

static struct rot_limit_table rot_limit_tbl_4x12 = {
	.ycbcr420_2p = {
		.min_w = 32,
		.min_h = 32,
		.max_w = SZ_32K,
		.max_h = SZ_32K,
		.align = 3,
	},
	.rgb888 = {
		.min_w = 8,
		.min_h = 8,
		.max_w = SZ_8K,
		.max_h = SZ_8K,
		.align = 2,
	},
};

static struct rot_limit_table rot_limit_tbl_5250 = {
	.ycbcr420_2p = {
		.min_w = 32,
		.min_h = 32,
		.max_w = SZ_32K,
		.max_h = SZ_32K,
		.align = 3,
	},
	.rgb888 = {
		.min_w = 8,
		.min_h = 8,
		.max_w = SZ_8K,
		.max_h = SZ_8K,
		.align = 1,
	},
};

static const struct of_device_id exynos_rotator_match[] = {
	{
		.compatible = "samsung,exynos4210-rotator",
		.data = &rot_limit_tbl_4210,
	},
	{
		.compatible = "samsung,exynos4212-rotator",
		.data = &rot_limit_tbl_4x12,
	},
	{
		.compatible = "samsung,exynos5250-rotator",
		.data = &rot_limit_tbl_5250,
	},
	{},
};

static int rotator_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct rot_context *rot;
	struct exynos_drm_ippdrv *ippdrv;
	const struct of_device_id *match;
	int ret;

	if (!dev->of_node) {
		dev_err(dev, "cannot find of_node.\n");
		return -ENODEV;
	}

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

	match = of_match_node(exynos_rotator_match, dev->of_node);
	if (!match) {
		dev_err(dev, "failed to match node\n");
		return -ENODEV;
	}
	rot->limit_tbl = (struct rot_limit_table *)match->data;

	rot->regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	rot->regs = devm_ioremap_resource(dev, rot->regs_res);
	if (IS_ERR(rot->regs))
		return PTR_ERR(rot->regs);

	rot->irq = platform_get_irq(pdev, 0);
	if (rot->irq < 0) {
		dev_err(dev, "failed to get irq\n");
		return rot->irq;
	}

	ret = devm_request_threaded_irq(dev, rot->irq, NULL,
			rotator_irq_handler, IRQF_ONESHOT, "drm_rotator", rot);
	if (ret < 0) {
		dev_err(dev, "failed to request irq\n");
		return ret;
	}

	rot->clock = devm_clk_get(dev, "rotator");
	if (IS_ERR(rot->clock)) {
		dev_err(dev, "failed to get clock\n");
		return PTR_ERR(rot->clock);
	}

	pm_runtime_enable(dev);

	ippdrv = &rot->ippdrv;
	ippdrv->dev = dev;
	ippdrv->ops[EXYNOS_DRM_OPS_SRC] = &rot_src_ops;
	ippdrv->ops[EXYNOS_DRM_OPS_DST] = &rot_dst_ops;
	ippdrv->check_property = rotator_ippdrv_check_property;
	ippdrv->start = rotator_ippdrv_start;
	ret = rotator_init_prop_list(ippdrv);
	if (ret < 0) {
		dev_err(dev, "failed to init property list.\n");
		goto err_ippdrv_register;
	}

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

	platform_set_drvdata(pdev, rot);

	ret = exynos_drm_ippdrv_register(ippdrv);
	if (ret < 0) {
		dev_err(dev, "failed to register drm rotator device\n");
		goto err_ippdrv_register;
	}

	dev_info(dev, "The exynos rotator is probed successfully\n");

	return 0;

err_ippdrv_register:
	pm_runtime_disable(dev);
	return ret;
}

static int rotator_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct rot_context *rot = dev_get_drvdata(dev);
	struct exynos_drm_ippdrv *ippdrv = &rot->ippdrv;

	exynos_drm_ippdrv_unregister(ippdrv);

	pm_runtime_disable(dev);

	return 0;
}

static int rotator_clk_crtl(struct rot_context *rot, bool enable)
{
	if (enable) {
		clk_enable(rot->clock);
		rot->suspended = false;
	} else {
		clk_disable(rot->clock);
		rot->suspended = true;
	}

	return 0;
}


#ifdef CONFIG_PM_SLEEP
static int rotator_suspend(struct device *dev)
{
	struct rot_context *rot = dev_get_drvdata(dev);

	if (pm_runtime_suspended(dev))
		return 0;

	return rotator_clk_crtl(rot, false);
}

static int rotator_resume(struct device *dev)
{
	struct rot_context *rot = dev_get_drvdata(dev);

	if (!pm_runtime_suspended(dev))
		return rotator_clk_crtl(rot, true);

	return 0;
}
#endif

#ifdef CONFIG_PM_RUNTIME
static int rotator_runtime_suspend(struct device *dev)
{
	struct rot_context *rot = dev_get_drvdata(dev);

	return  rotator_clk_crtl(rot, false);
}

static int rotator_runtime_resume(struct device *dev)
{
	struct rot_context *rot = dev_get_drvdata(dev);

	return  rotator_clk_crtl(rot, true);
}
#endif

static const struct dev_pm_ops rotator_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(rotator_suspend, rotator_resume)
	SET_RUNTIME_PM_OPS(rotator_runtime_suspend, rotator_runtime_resume,
									NULL)
};

struct platform_driver rotator_driver = {
	.probe		= rotator_probe,
	.remove		= rotator_remove,
	.driver		= {
		.name	= "exynos-rot",
		.owner	= THIS_MODULE,
		.pm	= &rotator_pm_ops,
		.of_match_table = exynos_rotator_match,
	},
};