summaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/msm/mdp_ppp.c
blob: be6079cdfbb6b7bff4da0b4dc4cdb69f52997aa3 (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
/* drivers/video/msm/mdp_ppp.c
 *
 * Copyright (C) 2007 QUALCOMM Incorporated
 * Copyright (C) 2007 Google Incorporated
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
#include <linux/fb.h>
#include <linux/file.h>
#include <linux/delay.h>
#include <linux/msm_mdp.h>
#include <linux/platform_data/video-msm_fb.h>

#include "mdp_hw.h"
#include "mdp_scale_tables.h"

#define DLOG(x...) do {} while (0)

#define MDP_DOWNSCALE_BLUR (MDP_DOWNSCALE_MAX + 1)
static int downscale_y_table = MDP_DOWNSCALE_MAX;
static int downscale_x_table = MDP_DOWNSCALE_MAX;

struct mdp_regs {
	uint32_t src0;
	uint32_t src1;
	uint32_t dst0;
	uint32_t dst1;
	uint32_t src_cfg;
	uint32_t dst_cfg;
	uint32_t src_pack;
	uint32_t dst_pack;
	uint32_t src_rect;
	uint32_t dst_rect;
	uint32_t src_ystride;
	uint32_t dst_ystride;
	uint32_t op;
	uint32_t src_bpp;
	uint32_t dst_bpp;
	uint32_t edge;
	uint32_t phasex_init;
	uint32_t phasey_init;
	uint32_t phasex_step;
	uint32_t phasey_step;
};

static uint32_t pack_pattern[] = {
	PPP_ARRAY0(PACK_PATTERN)
};

static uint32_t src_img_cfg[] = {
	PPP_ARRAY1(CFG, SRC)
};

static uint32_t dst_img_cfg[] = {
	PPP_ARRAY1(CFG, DST)
};

static uint32_t bytes_per_pixel[] = {
	[MDP_RGB_565] = 2,
	[MDP_RGB_888] = 3,
	[MDP_XRGB_8888] = 4,
	[MDP_ARGB_8888] = 4,
	[MDP_RGBA_8888] = 4,
	[MDP_BGRA_8888] = 4,
	[MDP_RGBX_8888] = 4,
	[MDP_Y_CBCR_H2V1] = 1,
	[MDP_Y_CBCR_H2V2] = 1,
	[MDP_Y_CRCB_H2V1] = 1,
	[MDP_Y_CRCB_H2V2] = 1,
	[MDP_YCRYCB_H2V1] = 2
};

static uint32_t dst_op_chroma[] = {
	PPP_ARRAY1(CHROMA_SAMP, DST)
};

static uint32_t src_op_chroma[] = {
	PPP_ARRAY1(CHROMA_SAMP, SRC)
};

static uint32_t bg_op_chroma[] = {
	PPP_ARRAY1(CHROMA_SAMP, BG)
};

static void rotate_dst_addr_x(struct mdp_blit_req *req, struct mdp_regs *regs)
{
	regs->dst0 += (req->dst_rect.w -
		       min((uint32_t)16, req->dst_rect.w)) * regs->dst_bpp;
	regs->dst1 += (req->dst_rect.w -
		       min((uint32_t)16, req->dst_rect.w)) * regs->dst_bpp;
}

static void rotate_dst_addr_y(struct mdp_blit_req *req, struct mdp_regs *regs)
{
	regs->dst0 += (req->dst_rect.h -
		       min((uint32_t)16, req->dst_rect.h)) *
		       regs->dst_ystride;
	regs->dst1 += (req->dst_rect.h -
		       min((uint32_t)16, req->dst_rect.h)) *
		       regs->dst_ystride;
}

static void blit_rotate(struct mdp_blit_req *req,
			struct mdp_regs *regs)
{
	if (req->flags == MDP_ROT_NOP)
		return;

	regs->op |= PPP_OP_ROT_ON;
	if ((req->flags & MDP_ROT_90 || req->flags & MDP_FLIP_LR) &&
	    !(req->flags & MDP_ROT_90 && req->flags & MDP_FLIP_LR))
		rotate_dst_addr_x(req, regs);
	if (req->flags & MDP_ROT_90)
		regs->op |= PPP_OP_ROT_90;
	if (req->flags & MDP_FLIP_UD) {
		regs->op |= PPP_OP_FLIP_UD;
		rotate_dst_addr_y(req, regs);
	}
	if (req->flags & MDP_FLIP_LR)
		regs->op |= PPP_OP_FLIP_LR;
}

static void blit_convert(struct mdp_blit_req *req, struct mdp_regs *regs)
{
	if (req->src.format == req->dst.format)
		return;
	if (IS_RGB(req->src.format) && IS_YCRCB(req->dst.format)) {
		regs->op |= PPP_OP_CONVERT_RGB2YCBCR | PPP_OP_CONVERT_ON;
	} else if (IS_YCRCB(req->src.format) && IS_RGB(req->dst.format)) {
		regs->op |= PPP_OP_CONVERT_YCBCR2RGB | PPP_OP_CONVERT_ON;
		if (req->dst.format == MDP_RGB_565)
			regs->op |= PPP_OP_CONVERT_MATRIX_SECONDARY;
	}
}

#define GET_BIT_RANGE(value, high, low) \
	(((1 << (high - low + 1)) - 1) & (value >> low))
static uint32_t transp_convert(struct mdp_blit_req *req)
{
	uint32_t transp = 0;
	if (req->src.format == MDP_RGB_565) {
		/* pad each value to 8 bits by copying the high bits into the
		 * low end, convert RGB to RBG by switching low 2 components */
		transp |= ((GET_BIT_RANGE(req->transp_mask, 15, 11) << 3) |
			   (GET_BIT_RANGE(req->transp_mask, 15, 13))) << 16;

		transp |= ((GET_BIT_RANGE(req->transp_mask, 4, 0) << 3) |
			   (GET_BIT_RANGE(req->transp_mask, 4, 2))) << 8;

		transp |= (GET_BIT_RANGE(req->transp_mask, 10, 5) << 2) |
			  (GET_BIT_RANGE(req->transp_mask, 10, 9));
	} else {
		/* convert RGB to RBG */
		transp |= (GET_BIT_RANGE(req->transp_mask, 15, 8)) |
			  (GET_BIT_RANGE(req->transp_mask, 23, 16) << 16) |
			  (GET_BIT_RANGE(req->transp_mask, 7, 0) << 8);
	}
	return transp;
}
#undef GET_BIT_RANGE

static void blit_blend(struct mdp_blit_req *req, struct mdp_regs *regs)
{
	/* TRANSP BLEND */
	if (req->transp_mask != MDP_TRANSP_NOP) {
		req->transp_mask = transp_convert(req);
		if (req->alpha != MDP_ALPHA_NOP) {
			/* use blended transparancy mode
			 * pixel = (src == transp) ? dst : blend
			 * blend is combo of blend_eq_sel and
			 * blend_alpha_sel */
			regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
				PPP_OP_BLEND_ALPHA_BLEND_NORMAL |
				PPP_OP_BLEND_CONSTANT_ALPHA |
				PPP_BLEND_ALPHA_TRANSP;
		} else {
			/* simple transparancy mode
			 * pixel = (src == transp) ? dst : src */
			regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
				PPP_OP_BLEND_SRCPIXEL_TRANSP;
		}
	}

	req->alpha &= 0xff;
	/* ALPHA BLEND */
	if (HAS_ALPHA(req->src.format)) {
		regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
			PPP_OP_BLEND_SRCPIXEL_ALPHA;
	} else if (req->alpha < MDP_ALPHA_NOP) {
		/* just blend by alpha */
		regs->op |= PPP_OP_ROT_ON | PPP_OP_BLEND_ON |
			PPP_OP_BLEND_ALPHA_BLEND_NORMAL |
			PPP_OP_BLEND_CONSTANT_ALPHA;
	}

	regs->op |= bg_op_chroma[req->dst.format];
}

#define ONE_HALF	(1LL << 32)
#define ONE		(1LL << 33)
#define TWO		(2LL << 33)
#define THREE		(3LL << 33)
#define FRAC_MASK (ONE - 1)
#define INT_MASK (~FRAC_MASK)

static int scale_params(uint32_t dim_in, uint32_t dim_out, uint32_t origin,
			uint32_t *phase_init, uint32_t *phase_step)
{
	/* to improve precicsion calculations are done in U31.33 and converted
	 * to U3.29 at the end */
	int64_t k1, k2, k3, k4, tmp;
	uint64_t n, d, os, os_p, od, od_p, oreq;
	unsigned rpa = 0;
	int64_t ip64, delta;

	if (dim_out % 3 == 0)
		rpa = !(dim_in % (dim_out / 3));

	n = ((uint64_t)dim_out) << 34;
	d = dim_in;
	if (!d)
		return -1;
	do_div(n, d);
	k3 = (n + 1) >> 1;
	if ((k3 >> 4) < (1LL << 27) || (k3 >> 4) > (1LL << 31)) {
		DLOG("crap bad scale\n");
		return -1;
	}
	n = ((uint64_t)dim_in) << 34;
	d = (uint64_t)dim_out;
	if (!d)
		return -1;
	do_div(n, d);
	k1 = (n + 1) >> 1;
	k2 = (k1 - ONE) >> 1;

	*phase_init = (int)(k2 >> 4);
	k4 = (k3 - ONE) >> 1;

	if (rpa) {
		os = ((uint64_t)origin << 33) - ONE_HALF;
		tmp = (dim_out * os) + ONE_HALF;
		if (!dim_in)
			return -1;
		do_div(tmp, dim_in);
		od = tmp - ONE_HALF;
	} else {
		os = ((uint64_t)origin << 1) - 1;
		od = (((k3 * os) >> 1) + k4);
	}

	od_p = od & INT_MASK;
	if (od_p != od)
		od_p += ONE;

	if (rpa) {
		tmp = (dim_in * od_p) + ONE_HALF;
		if (!dim_in)
			return -1;
		do_div(tmp, dim_in);
		os_p = tmp - ONE_HALF;
	} else {
		os_p = ((k1 * (od_p >> 33)) + k2);
	}

	oreq = (os_p & INT_MASK) - ONE;

	ip64 = os_p - oreq;
	delta = ((int64_t)(origin) << 33) - oreq;
	ip64 -= delta;
	/* limit to valid range before the left shift */
	delta = (ip64 & (1LL << 63)) ? 4 : -4;
	delta <<= 33;
	while (abs((int)(ip64 >> 33)) > 4)
		ip64 += delta;
	*phase_init = (int)(ip64 >> 4);
	*phase_step = (uint32_t)(k1 >> 4);
	return 0;
}

static void load_scale_table(const struct mdp_info *mdp,
			     struct mdp_table_entry *table, int len)
{
	int i;
	for (i = 0; i < len; i++)
		mdp_writel(mdp, table[i].val, table[i].reg);
}

enum {
IMG_LEFT,
IMG_RIGHT,
IMG_TOP,
IMG_BOTTOM,
};

static void get_edge_info(uint32_t src, uint32_t src_coord, uint32_t dst,
			  uint32_t *interp1, uint32_t *interp2,
			  uint32_t *repeat1, uint32_t *repeat2) {
	if (src > 3 * dst) {
		*interp1 = 0;
		*interp2 = src - 1;
		*repeat1 = 0;
		*repeat2 = 0;
	} else if (src == 3 * dst) {
		*interp1 = 0;
		*interp2 = src;
		*repeat1 = 0;
		*repeat2 = 1;
	} else if (src > dst && src < 3 * dst) {
		*interp1 = -1;
		*interp2 = src;
		*repeat1 = 1;
		*repeat2 = 1;
	} else if (src == dst) {
		*interp1 = -1;
		*interp2 = src + 1;
		*repeat1 = 1;
		*repeat2 = 2;
	} else {
		*interp1 = -2;
		*interp2 = src + 1;
		*repeat1 = 2;
		*repeat2 = 2;
	}
	*interp1 += src_coord;
	*interp2 += src_coord;
}

static int get_edge_cond(struct mdp_blit_req *req, struct mdp_regs *regs)
{
	int32_t luma_interp[4];
	int32_t luma_repeat[4];
	int32_t chroma_interp[4];
	int32_t chroma_bound[4];
	int32_t chroma_repeat[4];
	uint32_t dst_w, dst_h;

	memset(&luma_interp, 0, sizeof(int32_t) * 4);
	memset(&luma_repeat, 0, sizeof(int32_t) * 4);
	memset(&chroma_interp, 0, sizeof(int32_t) * 4);
	memset(&chroma_bound, 0, sizeof(int32_t) * 4);
	memset(&chroma_repeat, 0, sizeof(int32_t) * 4);
	regs->edge = 0;

	if (req->flags & MDP_ROT_90) {
		dst_w = req->dst_rect.h;
		dst_h = req->dst_rect.w;
	} else {
		dst_w = req->dst_rect.w;
		dst_h = req->dst_rect.h;
	}

	if (regs->op & (PPP_OP_SCALE_Y_ON | PPP_OP_SCALE_X_ON)) {
		get_edge_info(req->src_rect.h, req->src_rect.y, dst_h,
			      &luma_interp[IMG_TOP], &luma_interp[IMG_BOTTOM],
			      &luma_repeat[IMG_TOP], &luma_repeat[IMG_BOTTOM]);
		get_edge_info(req->src_rect.w, req->src_rect.x, dst_w,
			      &luma_interp[IMG_LEFT], &luma_interp[IMG_RIGHT],
			      &luma_repeat[IMG_LEFT], &luma_repeat[IMG_RIGHT]);
	} else {
		luma_interp[IMG_LEFT] = req->src_rect.x;
		luma_interp[IMG_RIGHT] = req->src_rect.x + req->src_rect.w - 1;
		luma_interp[IMG_TOP] = req->src_rect.y;
		luma_interp[IMG_BOTTOM] = req->src_rect.y + req->src_rect.h - 1;
		luma_repeat[IMG_LEFT] = 0;
		luma_repeat[IMG_TOP] = 0;
		luma_repeat[IMG_RIGHT] = 0;
		luma_repeat[IMG_BOTTOM] = 0;
	}

	chroma_interp[IMG_LEFT] = luma_interp[IMG_LEFT];
	chroma_interp[IMG_RIGHT] = luma_interp[IMG_RIGHT];
	chroma_interp[IMG_TOP] = luma_interp[IMG_TOP];
	chroma_interp[IMG_BOTTOM] = luma_interp[IMG_BOTTOM];

	chroma_bound[IMG_LEFT] = req->src_rect.x;
	chroma_bound[IMG_RIGHT] = req->src_rect.x + req->src_rect.w - 1;
	chroma_bound[IMG_TOP] = req->src_rect.y;
	chroma_bound[IMG_BOTTOM] = req->src_rect.y + req->src_rect.h - 1;

	if (IS_YCRCB(req->src.format)) {
		chroma_interp[IMG_LEFT] = chroma_interp[IMG_LEFT] >> 1;
		chroma_interp[IMG_RIGHT] = (chroma_interp[IMG_RIGHT] + 1) >> 1;

		chroma_bound[IMG_LEFT] = chroma_bound[IMG_LEFT] >> 1;
		chroma_bound[IMG_RIGHT] = chroma_bound[IMG_RIGHT] >> 1;
	}

	if (req->src.format == MDP_Y_CBCR_H2V2 ||
	    req->src.format == MDP_Y_CRCB_H2V2) {
		chroma_interp[IMG_TOP] = (chroma_interp[IMG_TOP] - 1) >> 1;
		chroma_interp[IMG_BOTTOM] = (chroma_interp[IMG_BOTTOM] + 1)
					    >> 1;
		chroma_bound[IMG_TOP] = (chroma_bound[IMG_TOP] + 1) >> 1;
		chroma_bound[IMG_BOTTOM] = chroma_bound[IMG_BOTTOM] >> 1;
	}

	chroma_repeat[IMG_LEFT] = chroma_bound[IMG_LEFT] -
				  chroma_interp[IMG_LEFT];
	chroma_repeat[IMG_RIGHT] = chroma_interp[IMG_RIGHT] -
				  chroma_bound[IMG_RIGHT];
	chroma_repeat[IMG_TOP] = chroma_bound[IMG_TOP] -
				  chroma_interp[IMG_TOP];
	chroma_repeat[IMG_BOTTOM] = chroma_interp[IMG_BOTTOM] -
				  chroma_bound[IMG_BOTTOM];

	if (chroma_repeat[IMG_LEFT] < 0 || chroma_repeat[IMG_LEFT] > 3 ||
	    chroma_repeat[IMG_RIGHT] < 0 || chroma_repeat[IMG_RIGHT] > 3 ||
	    chroma_repeat[IMG_TOP] < 0 || chroma_repeat[IMG_TOP] > 3 ||
	    chroma_repeat[IMG_BOTTOM] < 0 || chroma_repeat[IMG_BOTTOM] > 3 ||
	    luma_repeat[IMG_LEFT] < 0 || luma_repeat[IMG_LEFT] > 3 ||
	    luma_repeat[IMG_RIGHT] < 0 || luma_repeat[IMG_RIGHT] > 3 ||
	    luma_repeat[IMG_TOP] < 0 || luma_repeat[IMG_TOP] > 3 ||
	    luma_repeat[IMG_BOTTOM] < 0 || luma_repeat[IMG_BOTTOM] > 3)
		return -1;

	regs->edge |= (chroma_repeat[IMG_LEFT] & 3) << MDP_LEFT_CHROMA;
	regs->edge |= (chroma_repeat[IMG_RIGHT] & 3) << MDP_RIGHT_CHROMA;
	regs->edge |= (chroma_repeat[IMG_TOP] & 3) << MDP_TOP_CHROMA;
	regs->edge |= (chroma_repeat[IMG_BOTTOM] & 3) << MDP_BOTTOM_CHROMA;
	regs->edge |= (luma_repeat[IMG_LEFT] & 3) << MDP_LEFT_LUMA;
	regs->edge |= (luma_repeat[IMG_RIGHT] & 3) << MDP_RIGHT_LUMA;
	regs->edge |= (luma_repeat[IMG_TOP] & 3) << MDP_TOP_LUMA;
	regs->edge |= (luma_repeat[IMG_BOTTOM] & 3) << MDP_BOTTOM_LUMA;
	return 0;
}

static int blit_scale(const struct mdp_info *mdp, struct mdp_blit_req *req,
		      struct mdp_regs *regs)
{
	uint32_t phase_init_x, phase_init_y, phase_step_x, phase_step_y;
	uint32_t scale_factor_x, scale_factor_y;
	uint32_t downscale;
	uint32_t dst_w, dst_h;

	if (req->flags & MDP_ROT_90) {
		dst_w = req->dst_rect.h;
		dst_h = req->dst_rect.w;
	} else {
		dst_w = req->dst_rect.w;
		dst_h = req->dst_rect.h;
	}
	if ((req->src_rect.w == dst_w)  && (req->src_rect.h == dst_h) &&
	    !(req->flags & MDP_BLUR)) {
		regs->phasex_init = 0;
		regs->phasey_init = 0;
		regs->phasex_step = 0;
		regs->phasey_step = 0;
		return 0;
	}

	if (scale_params(req->src_rect.w, dst_w, 1, &phase_init_x,
			 &phase_step_x) ||
	    scale_params(req->src_rect.h, dst_h, 1, &phase_init_y,
			 &phase_step_y))
		return -1;

	scale_factor_x = (dst_w * 10) / req->src_rect.w;
	scale_factor_y = (dst_h * 10) / req->src_rect.h;

	if (scale_factor_x > 8)
		downscale = MDP_DOWNSCALE_PT8TO1;
	else if (scale_factor_x > 6)
		downscale = MDP_DOWNSCALE_PT6TOPT8;
	else if (scale_factor_x > 4)
		downscale = MDP_DOWNSCALE_PT4TOPT6;
	else
		downscale = MDP_DOWNSCALE_PT2TOPT4;
	if (downscale != downscale_x_table) {
		load_scale_table(mdp, mdp_downscale_x_table[downscale], 64);
		downscale_x_table = downscale;
	}

	if (scale_factor_y > 8)
		downscale = MDP_DOWNSCALE_PT8TO1;
	else if (scale_factor_y > 6)
		downscale = MDP_DOWNSCALE_PT6TOPT8;
	else if (scale_factor_y > 4)
		downscale = MDP_DOWNSCALE_PT4TOPT6;
	else
		downscale = MDP_DOWNSCALE_PT2TOPT4;
	if (downscale != downscale_y_table) {
		load_scale_table(mdp, mdp_downscale_y_table[downscale], 64);
		downscale_y_table = downscale;
	}

	regs->phasex_init = phase_init_x;
	regs->phasey_init = phase_init_y;
	regs->phasex_step = phase_step_x;
	regs->phasey_step = phase_step_y;
	regs->op |= (PPP_OP_SCALE_Y_ON | PPP_OP_SCALE_X_ON);
	return 0;

}

static void blit_blur(const struct mdp_info *mdp, struct mdp_blit_req *req,
		      struct mdp_regs *regs)
{
	if (!(req->flags & MDP_BLUR))
		return;

	if (!(downscale_x_table == MDP_DOWNSCALE_BLUR &&
	      downscale_y_table == MDP_DOWNSCALE_BLUR)) {
		load_scale_table(mdp, mdp_gaussian_blur_table, 128);
		downscale_x_table = MDP_DOWNSCALE_BLUR;
		downscale_y_table = MDP_DOWNSCALE_BLUR;
	}

	regs->op |= (PPP_OP_SCALE_Y_ON | PPP_OP_SCALE_X_ON);
}


#define IMG_LEN(rect_h, w, rect_w, bpp) (((rect_h) * w) * bpp)

#define Y_TO_CRCB_RATIO(format) \
	((format == MDP_Y_CBCR_H2V2 || format == MDP_Y_CRCB_H2V2) ?  2 :\
	 (format == MDP_Y_CBCR_H2V1 || format == MDP_Y_CRCB_H2V1) ?  1 : 1)

static void get_len(struct mdp_img *img, struct mdp_rect *rect, uint32_t bpp,
		    uint32_t *len0, uint32_t *len1)
{
	*len0 = IMG_LEN(rect->h, img->width, rect->w, bpp);
	if (IS_PSEUDOPLNR(img->format))
		*len1 = *len0/Y_TO_CRCB_RATIO(img->format);
	else
		*len1 = 0;
}

static int valid_src_dst(unsigned long src_start, unsigned long src_len,
			 unsigned long dst_start, unsigned long dst_len,
			 struct mdp_blit_req *req, struct mdp_regs *regs)
{
	unsigned long src_min_ok = src_start;
	unsigned long src_max_ok = src_start + src_len;
	unsigned long dst_min_ok = dst_start;
	unsigned long dst_max_ok = dst_start + dst_len;
	uint32_t src0_len, src1_len, dst0_len, dst1_len;
	get_len(&req->src, &req->src_rect, regs->src_bpp, &src0_len,
		 &src1_len);
	get_len(&req->dst, &req->dst_rect, regs->dst_bpp, &dst0_len,
		 &dst1_len);

	if (regs->src0 < src_min_ok || regs->src0 > src_max_ok ||
	    regs->src0 + src0_len > src_max_ok) {
		DLOG("invalid_src %x %x %lx %lx\n", regs->src0,
		      src0_len, src_min_ok, src_max_ok);
		return 0;
	}
	if (regs->src_cfg & PPP_SRC_PLANE_PSEUDOPLNR) {
		if (regs->src1 < src_min_ok || regs->src1 > src_max_ok ||
		    regs->src1 + src1_len > src_max_ok) {
			DLOG("invalid_src1");
			return 0;
		}
	}
	if (regs->dst0 < dst_min_ok || regs->dst0 > dst_max_ok ||
	    regs->dst0 + dst0_len > dst_max_ok) {
		DLOG("invalid_dst");
		return 0;
	}
	if (regs->dst_cfg & PPP_SRC_PLANE_PSEUDOPLNR) {
		if (regs->dst1 < dst_min_ok || regs->dst1 > dst_max_ok ||
		    regs->dst1 + dst1_len > dst_max_ok) {
			DLOG("invalid_dst1");
			return 0;
		}
	}
	return 1;
}


static void flush_imgs(struct mdp_blit_req *req, struct mdp_regs *regs,
		       struct file *src_file, struct file *dst_file)
{
}

static void get_chroma_addr(struct mdp_img *img, struct mdp_rect *rect,
			    uint32_t base, uint32_t bpp, uint32_t cfg,
			    uint32_t *addr, uint32_t *ystride)
{
	uint32_t compress_v = Y_TO_CRCB_RATIO(img->format);
	uint32_t compress_h = 2;
	uint32_t  offset;

	if (IS_PSEUDOPLNR(img->format)) {
		offset = (rect->x / compress_h) * compress_h;
		offset += rect->y == 0 ? 0 :
			  ((rect->y + 1) / compress_v) * img->width;
		*addr = base + (img->width * img->height * bpp);
		*addr += offset * bpp;
		*ystride |= *ystride << 16;
	} else {
		*addr = 0;
	}
}

static int send_blit(const struct mdp_info *mdp, struct mdp_blit_req *req,
		     struct mdp_regs *regs, struct file *src_file,
		     struct file *dst_file)
{
	mdp_writel(mdp, 1, 0x060);
	mdp_writel(mdp, regs->src_rect, PPP_ADDR_SRC_ROI);
	mdp_writel(mdp, regs->src0, PPP_ADDR_SRC0);
	mdp_writel(mdp, regs->src1, PPP_ADDR_SRC1);
	mdp_writel(mdp, regs->src_ystride, PPP_ADDR_SRC_YSTRIDE);
	mdp_writel(mdp, regs->src_cfg, PPP_ADDR_SRC_CFG);
	mdp_writel(mdp, regs->src_pack, PPP_ADDR_SRC_PACK_PATTERN);

	mdp_writel(mdp, regs->op, PPP_ADDR_OPERATION);
	mdp_writel(mdp, regs->phasex_init, PPP_ADDR_PHASEX_INIT);
	mdp_writel(mdp, regs->phasey_init, PPP_ADDR_PHASEY_INIT);
	mdp_writel(mdp, regs->phasex_step, PPP_ADDR_PHASEX_STEP);
	mdp_writel(mdp, regs->phasey_step, PPP_ADDR_PHASEY_STEP);

	mdp_writel(mdp, (req->alpha << 24) | (req->transp_mask & 0xffffff),
	       PPP_ADDR_ALPHA_TRANSP);

	mdp_writel(mdp, regs->dst_cfg, PPP_ADDR_DST_CFG);
	mdp_writel(mdp, regs->dst_pack, PPP_ADDR_DST_PACK_PATTERN);
	mdp_writel(mdp, regs->dst_rect, PPP_ADDR_DST_ROI);
	mdp_writel(mdp, regs->dst0, PPP_ADDR_DST0);
	mdp_writel(mdp, regs->dst1, PPP_ADDR_DST1);
	mdp_writel(mdp, regs->dst_ystride, PPP_ADDR_DST_YSTRIDE);

	mdp_writel(mdp, regs->edge, PPP_ADDR_EDGE);
	if (regs->op & PPP_OP_BLEND_ON) {
		mdp_writel(mdp, regs->dst0, PPP_ADDR_BG0);
		mdp_writel(mdp, regs->dst1, PPP_ADDR_BG1);
		mdp_writel(mdp, regs->dst_ystride, PPP_ADDR_BG_YSTRIDE);
		mdp_writel(mdp, src_img_cfg[req->dst.format], PPP_ADDR_BG_CFG);
		mdp_writel(mdp, pack_pattern[req->dst.format],
			   PPP_ADDR_BG_PACK_PATTERN);
	}
	flush_imgs(req, regs, src_file, dst_file);
	mdp_writel(mdp, 0x1000, MDP_DISPLAY0_START);
	return 0;
}

int mdp_ppp_blit(const struct mdp_info *mdp, struct mdp_blit_req *req,
		 struct file *src_file, unsigned long src_start, unsigned long src_len,
		 struct file *dst_file, unsigned long dst_start, unsigned long dst_len)
{
	struct mdp_regs regs = {0};

	if (unlikely(req->src.format >= MDP_IMGTYPE_LIMIT ||
		     req->dst.format >= MDP_IMGTYPE_LIMIT)) {
		printk(KERN_ERR "mpd_ppp: img is of wrong format\n");
		return -EINVAL;
	}

	if (unlikely(req->src_rect.x > req->src.width ||
		     req->src_rect.y > req->src.height ||
		     req->dst_rect.x > req->dst.width ||
		     req->dst_rect.y > req->dst.height)) {
		printk(KERN_ERR "mpd_ppp: img rect is outside of img!\n");
		return -EINVAL;
	}

	/* set the src image configuration */
	regs.src_cfg = src_img_cfg[req->src.format];
	regs.src_cfg |= (req->src_rect.x & 0x1) ? PPP_SRC_BPP_ROI_ODD_X : 0;
	regs.src_cfg |= (req->src_rect.y & 0x1) ? PPP_SRC_BPP_ROI_ODD_Y : 0;
	regs.src_rect = (req->src_rect.h << 16) | req->src_rect.w;
	regs.src_pack = pack_pattern[req->src.format];

	/* set the dest image configuration */
	regs.dst_cfg = dst_img_cfg[req->dst.format] | PPP_DST_OUT_SEL_AXI;
	regs.dst_rect = (req->dst_rect.h << 16) | req->dst_rect.w;
	regs.dst_pack = pack_pattern[req->dst.format];

	/* set src, bpp, start pixel and ystride */
	regs.src_bpp = bytes_per_pixel[req->src.format];
	regs.src0 = src_start + req->src.offset;
	regs.src_ystride = req->src.width * regs.src_bpp;
	get_chroma_addr(&req->src, &req->src_rect, regs.src0, regs.src_bpp,
			regs.src_cfg, &regs.src1, &regs.src_ystride);
	regs.src0 += (req->src_rect.x + (req->src_rect.y * req->src.width)) *
		      regs.src_bpp;

	/* set dst, bpp, start pixel and ystride */
	regs.dst_bpp = bytes_per_pixel[req->dst.format];
	regs.dst0 = dst_start + req->dst.offset;
	regs.dst_ystride = req->dst.width * regs.dst_bpp;
	get_chroma_addr(&req->dst, &req->dst_rect, regs.dst0, regs.dst_bpp,
			regs.dst_cfg, &regs.dst1, &regs.dst_ystride);
	regs.dst0 += (req->dst_rect.x + (req->dst_rect.y * req->dst.width)) *
		      regs.dst_bpp;

	if (!valid_src_dst(src_start, src_len, dst_start, dst_len, req,
			   &regs)) {
		printk(KERN_ERR "mpd_ppp: final src or dst location is "
			"invalid, are you trying to make an image too large "
			"or to place it outside the screen?\n");
		return -EINVAL;
	}

	/* set up operation register */
	regs.op = 0;
	blit_rotate(req, &regs);
	blit_convert(req, &regs);
	if (req->flags & MDP_DITHER)
		regs.op |= PPP_OP_DITHER_EN;
	blit_blend(req, &regs);
	if (blit_scale(mdp, req, &regs)) {
		printk(KERN_ERR "mpd_ppp: error computing scale for img.\n");
		return -EINVAL;
	}
	blit_blur(mdp, req, &regs);
	regs.op |= dst_op_chroma[req->dst.format] |
		   src_op_chroma[req->src.format];

	/* if the image is YCRYCB, the x and w must be even */
	if (unlikely(req->src.format == MDP_YCRYCB_H2V1)) {
		req->src_rect.x = req->src_rect.x & (~0x1);
		req->src_rect.w = req->src_rect.w & (~0x1);
		req->dst_rect.x = req->dst_rect.x & (~0x1);
		req->dst_rect.w = req->dst_rect.w & (~0x1);
	}
	if (get_edge_cond(req, &regs))
		return -EINVAL;

	send_blit(mdp, req, &regs, src_file, dst_file);
	return 0;
}