summaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/s5p-g2d/g2d.c
blob: 81483da2464bb62a1bcb742a56bb688d79524862 (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
/*
 * Samsung S5P G2D - 2D Graphics Accelerator Driver
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Kamil Debski, <k.debski@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/module.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/of.h>

#include <linux/platform_device.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>

#include "g2d.h"
#include "g2d-regs.h"

#define fh2ctx(__fh) container_of(__fh, struct g2d_ctx, fh)

static struct g2d_fmt formats[] = {
	{
		.name	= "XRGB_8888",
		.fourcc	= V4L2_PIX_FMT_RGB32,
		.depth	= 32,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_8888),
	},
	{
		.name	= "RGB_565",
		.fourcc	= V4L2_PIX_FMT_RGB565X,
		.depth	= 16,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_RGB_565),
	},
	{
		.name	= "XRGB_1555",
		.fourcc	= V4L2_PIX_FMT_RGB555X,
		.depth	= 16,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_1555),
	},
	{
		.name	= "XRGB_4444",
		.fourcc	= V4L2_PIX_FMT_RGB444,
		.depth	= 16,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_XRGB_4444),
	},
	{
		.name	= "PACKED_RGB_888",
		.fourcc	= V4L2_PIX_FMT_RGB24,
		.depth	= 24,
		.hw	= COLOR_MODE(ORDER_XRGB, MODE_PACKED_RGB_888),
	},
};
#define NUM_FORMATS ARRAY_SIZE(formats)

static struct g2d_frame def_frame = {
	.width		= DEFAULT_WIDTH,
	.height		= DEFAULT_HEIGHT,
	.c_width	= DEFAULT_WIDTH,
	.c_height	= DEFAULT_HEIGHT,
	.o_width	= 0,
	.o_height	= 0,
	.fmt		= &formats[0],
	.right		= DEFAULT_WIDTH,
	.bottom		= DEFAULT_HEIGHT,
};

static struct g2d_fmt *find_fmt(struct v4l2_format *f)
{
	unsigned int i;
	for (i = 0; i < NUM_FORMATS; i++) {
		if (formats[i].fourcc == f->fmt.pix.pixelformat)
			return &formats[i];
	}
	return NULL;
}


static struct g2d_frame *get_frame(struct g2d_ctx *ctx,
							enum v4l2_buf_type type)
{
	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		return &ctx->in;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return &ctx->out;
	default:
		return ERR_PTR(-EINVAL);
	}
}

static int g2d_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
			   unsigned int *nbuffers, unsigned int *nplanes,
			   unsigned int sizes[], void *alloc_ctxs[])
{
	struct g2d_ctx *ctx = vb2_get_drv_priv(vq);
	struct g2d_frame *f = get_frame(ctx, vq->type);

	if (IS_ERR(f))
		return PTR_ERR(f);

	sizes[0] = f->size;
	*nplanes = 1;
	alloc_ctxs[0] = ctx->dev->alloc_ctx;

	if (*nbuffers == 0)
		*nbuffers = 1;

	return 0;
}

static int g2d_buf_prepare(struct vb2_buffer *vb)
{
	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
	struct g2d_frame *f = get_frame(ctx, vb->vb2_queue->type);

	if (IS_ERR(f))
		return PTR_ERR(f);
	vb2_set_plane_payload(vb, 0, f->size);
	return 0;
}

static void g2d_buf_queue(struct vb2_buffer *vb)
{
	struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
}

static struct vb2_ops g2d_qops = {
	.queue_setup	= g2d_queue_setup,
	.buf_prepare	= g2d_buf_prepare,
	.buf_queue	= g2d_buf_queue,
};

static int queue_init(void *priv, struct vb2_queue *src_vq,
						struct vb2_queue *dst_vq)
{
	struct g2d_ctx *ctx = priv;
	int ret;

	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
	src_vq->drv_priv = ctx;
	src_vq->ops = &g2d_qops;
	src_vq->mem_ops = &vb2_dma_contig_memops;
	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
	src_vq->lock = &ctx->dev->mutex;

	ret = vb2_queue_init(src_vq);
	if (ret)
		return ret;

	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
	dst_vq->drv_priv = ctx;
	dst_vq->ops = &g2d_qops;
	dst_vq->mem_ops = &vb2_dma_contig_memops;
	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
	dst_vq->lock = &ctx->dev->mutex;

	return vb2_queue_init(dst_vq);
}

static int g2d_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct g2d_ctx *ctx = container_of(ctrl->handler, struct g2d_ctx,
								ctrl_handler);
	unsigned long flags;

	spin_lock_irqsave(&ctx->dev->ctrl_lock, flags);
	switch (ctrl->id) {
	case V4L2_CID_COLORFX:
		if (ctrl->val == V4L2_COLORFX_NEGATIVE)
			ctx->rop = ROP4_INVERT;
		else
			ctx->rop = ROP4_COPY;
		break;

	case V4L2_CID_HFLIP:
		ctx->flip = ctx->ctrl_hflip->val | (ctx->ctrl_vflip->val << 1);
		break;

	}
	spin_unlock_irqrestore(&ctx->dev->ctrl_lock, flags);
	return 0;
}

static const struct v4l2_ctrl_ops g2d_ctrl_ops = {
	.s_ctrl		= g2d_s_ctrl,
};

static int g2d_setup_ctrls(struct g2d_ctx *ctx)
{
	struct g2d_dev *dev = ctx->dev;

	v4l2_ctrl_handler_init(&ctx->ctrl_handler, 3);

	ctx->ctrl_hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler, &g2d_ctrl_ops,
						V4L2_CID_HFLIP, 0, 1, 1, 0);

	ctx->ctrl_vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler, &g2d_ctrl_ops,
						V4L2_CID_VFLIP, 0, 1, 1, 0);

	v4l2_ctrl_new_std_menu(
		&ctx->ctrl_handler,
		&g2d_ctrl_ops,
		V4L2_CID_COLORFX,
		V4L2_COLORFX_NEGATIVE,
		~((1 << V4L2_COLORFX_NONE) | (1 << V4L2_COLORFX_NEGATIVE)),
		V4L2_COLORFX_NONE);

	if (ctx->ctrl_handler.error) {
		int err = ctx->ctrl_handler.error;
		v4l2_err(&dev->v4l2_dev, "g2d_setup_ctrls failed\n");
		v4l2_ctrl_handler_free(&ctx->ctrl_handler);
		return err;
	}

	v4l2_ctrl_cluster(2, &ctx->ctrl_hflip);

	return 0;
}

static int g2d_open(struct file *file)
{
	struct g2d_dev *dev = video_drvdata(file);
	struct g2d_ctx *ctx = NULL;
	int ret = 0;

	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;
	ctx->dev = dev;
	/* Set default formats */
	ctx->in		= def_frame;
	ctx->out	= def_frame;

	if (mutex_lock_interruptible(&dev->mutex)) {
		kfree(ctx);
		return -ERESTARTSYS;
	}
	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
	if (IS_ERR(ctx->fh.m2m_ctx)) {
		ret = PTR_ERR(ctx->fh.m2m_ctx);
		mutex_unlock(&dev->mutex);
		kfree(ctx);
		return ret;
	}
	v4l2_fh_init(&ctx->fh, video_devdata(file));
	file->private_data = &ctx->fh;
	v4l2_fh_add(&ctx->fh);

	g2d_setup_ctrls(ctx);

	/* Write the default values to the ctx struct */
	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);

	ctx->fh.ctrl_handler = &ctx->ctrl_handler;
	mutex_unlock(&dev->mutex);

	v4l2_info(&dev->v4l2_dev, "instance opened\n");
	return 0;
}

static int g2d_release(struct file *file)
{
	struct g2d_dev *dev = video_drvdata(file);
	struct g2d_ctx *ctx = fh2ctx(file->private_data);

	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
	v4l2_fh_del(&ctx->fh);
	v4l2_fh_exit(&ctx->fh);
	kfree(ctx);
	v4l2_info(&dev->v4l2_dev, "instance closed\n");
	return 0;
}


static int vidioc_querycap(struct file *file, void *priv,
				struct v4l2_capability *cap)
{
	strncpy(cap->driver, G2D_NAME, sizeof(cap->driver) - 1);
	strncpy(cap->card, G2D_NAME, sizeof(cap->card) - 1);
	cap->bus_info[0] = 0;
	cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

static int vidioc_enum_fmt(struct file *file, void *prv, struct v4l2_fmtdesc *f)
{
	struct g2d_fmt *fmt;
	if (f->index >= NUM_FORMATS)
		return -EINVAL;
	fmt = &formats[f->index];
	f->pixelformat = fmt->fourcc;
	strncpy(f->description, fmt->name, sizeof(f->description) - 1);
	return 0;
}

static int vidioc_g_fmt(struct file *file, void *prv, struct v4l2_format *f)
{
	struct g2d_ctx *ctx = prv;
	struct vb2_queue *vq;
	struct g2d_frame *frm;

	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
	if (!vq)
		return -EINVAL;
	frm = get_frame(ctx, f->type);
	if (IS_ERR(frm))
		return PTR_ERR(frm);

	f->fmt.pix.width		= frm->width;
	f->fmt.pix.height		= frm->height;
	f->fmt.pix.field		= V4L2_FIELD_NONE;
	f->fmt.pix.pixelformat		= frm->fmt->fourcc;
	f->fmt.pix.bytesperline		= (frm->width * frm->fmt->depth) >> 3;
	f->fmt.pix.sizeimage		= frm->size;
	return 0;
}

static int vidioc_try_fmt(struct file *file, void *prv, struct v4l2_format *f)
{
	struct g2d_fmt *fmt;
	enum v4l2_field *field;

	fmt = find_fmt(f);
	if (!fmt)
		return -EINVAL;

	field = &f->fmt.pix.field;
	if (*field == V4L2_FIELD_ANY)
		*field = V4L2_FIELD_NONE;
	else if (*field != V4L2_FIELD_NONE)
		return -EINVAL;

	if (f->fmt.pix.width > MAX_WIDTH)
		f->fmt.pix.width = MAX_WIDTH;
	if (f->fmt.pix.height > MAX_HEIGHT)
		f->fmt.pix.height = MAX_HEIGHT;

	if (f->fmt.pix.width < 1)
		f->fmt.pix.width = 1;
	if (f->fmt.pix.height < 1)
		f->fmt.pix.height = 1;

	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	return 0;
}

static int vidioc_s_fmt(struct file *file, void *prv, struct v4l2_format *f)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	struct vb2_queue *vq;
	struct g2d_frame *frm;
	struct g2d_fmt *fmt;
	int ret = 0;

	/* Adjust all values accordingly to the hardware capabilities
	 * and chosen format. */
	ret = vidioc_try_fmt(file, prv, f);
	if (ret)
		return ret;
	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
	if (vb2_is_busy(vq)) {
		v4l2_err(&dev->v4l2_dev, "queue (%d) bust\n", f->type);
		return -EBUSY;
	}
	frm = get_frame(ctx, f->type);
	if (IS_ERR(frm))
		return PTR_ERR(frm);
	fmt = find_fmt(f);
	if (!fmt)
		return -EINVAL;
	frm->width	= f->fmt.pix.width;
	frm->height	= f->fmt.pix.height;
	frm->size	= f->fmt.pix.sizeimage;
	/* Reset crop settings */
	frm->o_width	= 0;
	frm->o_height	= 0;
	frm->c_width	= frm->width;
	frm->c_height	= frm->height;
	frm->right	= frm->width;
	frm->bottom	= frm->height;
	frm->fmt	= fmt;
	frm->stride	= f->fmt.pix.bytesperline;
	return 0;
}

static int vidioc_cropcap(struct file *file, void *priv,
					struct v4l2_cropcap *cr)
{
	struct g2d_ctx *ctx = priv;
	struct g2d_frame *f;

	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	cr->bounds.left		= 0;
	cr->bounds.top		= 0;
	cr->bounds.width	= f->width;
	cr->bounds.height	= f->height;
	cr->defrect		= cr->bounds;
	return 0;
}

static int vidioc_g_crop(struct file *file, void *prv, struct v4l2_crop *cr)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_frame *f;

	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	cr->c.left	= f->o_height;
	cr->c.top	= f->o_width;
	cr->c.width	= f->c_width;
	cr->c.height	= f->c_height;
	return 0;
}

static int vidioc_try_crop(struct file *file, void *prv, const struct v4l2_crop *cr)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	struct g2d_frame *f;

	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	if (cr->c.top < 0 || cr->c.left < 0) {
		v4l2_err(&dev->v4l2_dev,
			"doesn't support negative values for top & left\n");
		return -EINVAL;
	}

	return 0;
}

static int vidioc_s_crop(struct file *file, void *prv, const struct v4l2_crop *cr)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_frame *f;
	int ret;

	ret = vidioc_try_crop(file, prv, cr);
	if (ret)
		return ret;
	f = get_frame(ctx, cr->type);
	if (IS_ERR(f))
		return PTR_ERR(f);

	f->c_width	= cr->c.width;
	f->c_height	= cr->c.height;
	f->o_width	= cr->c.left;
	f->o_height	= cr->c.top;
	f->bottom	= f->o_height + f->c_height;
	f->right	= f->o_width + f->c_width;
	return 0;
}

static void job_abort(void *prv)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;

	if (dev->curr == NULL) /* No job currently running */
		return;

	wait_event_timeout(dev->irq_queue,
			   dev->curr == NULL,
			   msecs_to_jiffies(G2D_TIMEOUT));
}

static void device_run(void *prv)
{
	struct g2d_ctx *ctx = prv;
	struct g2d_dev *dev = ctx->dev;
	struct vb2_buffer *src, *dst;
	unsigned long flags;
	u32 cmd = 0;

	dev->curr = ctx;

	src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
	dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);

	clk_enable(dev->gate);
	g2d_reset(dev);

	spin_lock_irqsave(&dev->ctrl_lock, flags);

	g2d_set_src_size(dev, &ctx->in);
	g2d_set_src_addr(dev, vb2_dma_contig_plane_dma_addr(src, 0));

	g2d_set_dst_size(dev, &ctx->out);
	g2d_set_dst_addr(dev, vb2_dma_contig_plane_dma_addr(dst, 0));

	g2d_set_rop4(dev, ctx->rop);
	g2d_set_flip(dev, ctx->flip);

	if (ctx->in.c_width != ctx->out.c_width ||
		ctx->in.c_height != ctx->out.c_height) {
		if (dev->variant->hw_rev == TYPE_G2D_3X)
			cmd |= CMD_V3_ENABLE_STRETCH;
		else
			g2d_set_v41_stretch(dev, &ctx->in, &ctx->out);
	}

	g2d_set_cmd(dev, cmd);
	g2d_start(dev);

	spin_unlock_irqrestore(&dev->ctrl_lock, flags);
}

static irqreturn_t g2d_isr(int irq, void *prv)
{
	struct g2d_dev *dev = prv;
	struct g2d_ctx *ctx = dev->curr;
	struct vb2_buffer *src, *dst;

	g2d_clear_int(dev);
	clk_disable(dev->gate);

	BUG_ON(ctx == NULL);

	src = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
	dst = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);

	BUG_ON(src == NULL);
	BUG_ON(dst == NULL);

	dst->v4l2_buf.timecode = src->v4l2_buf.timecode;
	dst->v4l2_buf.timestamp = src->v4l2_buf.timestamp;
	dst->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
	dst->v4l2_buf.flags |=
		src->v4l2_buf.flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;

	v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
	v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
	v4l2_m2m_job_finish(dev->m2m_dev, ctx->fh.m2m_ctx);

	dev->curr = NULL;
	wake_up(&dev->irq_queue);
	return IRQ_HANDLED;
}

static const struct v4l2_file_operations g2d_fops = {
	.owner		= THIS_MODULE,
	.open		= g2d_open,
	.release	= g2d_release,
	.poll		= v4l2_m2m_fop_poll,
	.unlocked_ioctl	= video_ioctl2,
	.mmap		= v4l2_m2m_fop_mmap,
};

static const struct v4l2_ioctl_ops g2d_ioctl_ops = {
	.vidioc_querycap	= vidioc_querycap,

	.vidioc_enum_fmt_vid_cap	= vidioc_enum_fmt,
	.vidioc_g_fmt_vid_cap		= vidioc_g_fmt,
	.vidioc_try_fmt_vid_cap		= vidioc_try_fmt,
	.vidioc_s_fmt_vid_cap		= vidioc_s_fmt,

	.vidioc_enum_fmt_vid_out	= vidioc_enum_fmt,
	.vidioc_g_fmt_vid_out		= vidioc_g_fmt,
	.vidioc_try_fmt_vid_out		= vidioc_try_fmt,
	.vidioc_s_fmt_vid_out		= vidioc_s_fmt,

	.vidioc_reqbufs			= v4l2_m2m_ioctl_reqbufs,
	.vidioc_querybuf		= v4l2_m2m_ioctl_querybuf,
	.vidioc_qbuf			= v4l2_m2m_ioctl_qbuf,
	.vidioc_dqbuf			= v4l2_m2m_ioctl_dqbuf,

	.vidioc_streamon		= v4l2_m2m_ioctl_streamon,
	.vidioc_streamoff		= v4l2_m2m_ioctl_streamoff,

	.vidioc_g_crop			= vidioc_g_crop,
	.vidioc_s_crop			= vidioc_s_crop,
	.vidioc_cropcap			= vidioc_cropcap,
};

static struct video_device g2d_videodev = {
	.name		= G2D_NAME,
	.fops		= &g2d_fops,
	.ioctl_ops	= &g2d_ioctl_ops,
	.minor		= -1,
	.release	= video_device_release,
	.vfl_dir	= VFL_DIR_M2M,
};

static struct v4l2_m2m_ops g2d_m2m_ops = {
	.device_run	= device_run,
	.job_abort	= job_abort,
};

static const struct of_device_id exynos_g2d_match[];

static int g2d_probe(struct platform_device *pdev)
{
	struct g2d_dev *dev;
	struct video_device *vfd;
	struct resource *res;
	const struct of_device_id *of_id;
	int ret = 0;

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

	spin_lock_init(&dev->ctrl_lock);
	mutex_init(&dev->mutex);
	atomic_set(&dev->num_inst, 0);
	init_waitqueue_head(&dev->irq_queue);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	dev->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(dev->regs))
		return PTR_ERR(dev->regs);

	dev->clk = clk_get(&pdev->dev, "sclk_fimg2d");
	if (IS_ERR(dev->clk)) {
		dev_err(&pdev->dev, "failed to get g2d clock\n");
		return -ENXIO;
	}

	ret = clk_prepare(dev->clk);
	if (ret) {
		dev_err(&pdev->dev, "failed to prepare g2d clock\n");
		goto put_clk;
	}

	dev->gate = clk_get(&pdev->dev, "fimg2d");
	if (IS_ERR(dev->gate)) {
		dev_err(&pdev->dev, "failed to get g2d clock gate\n");
		ret = -ENXIO;
		goto unprep_clk;
	}

	ret = clk_prepare(dev->gate);
	if (ret) {
		dev_err(&pdev->dev, "failed to prepare g2d clock gate\n");
		goto put_clk_gate;
	}

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
		dev_err(&pdev->dev, "failed to find IRQ\n");
		ret = -ENXIO;
		goto unprep_clk_gate;
	}

	dev->irq = res->start;

	ret = devm_request_irq(&pdev->dev, dev->irq, g2d_isr,
						0, pdev->name, dev);
	if (ret) {
		dev_err(&pdev->dev, "failed to install IRQ\n");
		goto put_clk_gate;
	}

	dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
	if (IS_ERR(dev->alloc_ctx)) {
		ret = PTR_ERR(dev->alloc_ctx);
		goto unprep_clk_gate;
	}

	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
	if (ret)
		goto alloc_ctx_cleanup;
	vfd = video_device_alloc();
	if (!vfd) {
		v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
		ret = -ENOMEM;
		goto unreg_v4l2_dev;
	}
	*vfd = g2d_videodev;
	vfd->lock = &dev->mutex;
	vfd->v4l2_dev = &dev->v4l2_dev;
	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
	if (ret) {
		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
		goto rel_vdev;
	}
	video_set_drvdata(vfd, dev);
	snprintf(vfd->name, sizeof(vfd->name), "%s", g2d_videodev.name);
	dev->vfd = vfd;
	v4l2_info(&dev->v4l2_dev, "device registered as /dev/video%d\n",
								vfd->num);
	platform_set_drvdata(pdev, dev);
	dev->m2m_dev = v4l2_m2m_init(&g2d_m2m_ops);
	if (IS_ERR(dev->m2m_dev)) {
		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
		ret = PTR_ERR(dev->m2m_dev);
		goto unreg_video_dev;
	}

	def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;

	if (!pdev->dev.of_node) {
		dev->variant = g2d_get_drv_data(pdev);
	} else {
		of_id = of_match_node(exynos_g2d_match, pdev->dev.of_node);
		if (!of_id) {
			ret = -ENODEV;
			goto unreg_video_dev;
		}
		dev->variant = (struct g2d_variant *)of_id->data;
	}

	return 0;

unreg_video_dev:
	video_unregister_device(dev->vfd);
rel_vdev:
	video_device_release(vfd);
unreg_v4l2_dev:
	v4l2_device_unregister(&dev->v4l2_dev);
alloc_ctx_cleanup:
	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
unprep_clk_gate:
	clk_unprepare(dev->gate);
put_clk_gate:
	clk_put(dev->gate);
unprep_clk:
	clk_unprepare(dev->clk);
put_clk:
	clk_put(dev->clk);

	return ret;
}

static int g2d_remove(struct platform_device *pdev)
{
	struct g2d_dev *dev = platform_get_drvdata(pdev);

	v4l2_info(&dev->v4l2_dev, "Removing " G2D_NAME);
	v4l2_m2m_release(dev->m2m_dev);
	video_unregister_device(dev->vfd);
	v4l2_device_unregister(&dev->v4l2_dev);
	vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
	clk_unprepare(dev->gate);
	clk_put(dev->gate);
	clk_unprepare(dev->clk);
	clk_put(dev->clk);
	return 0;
}

static struct g2d_variant g2d_drvdata_v3x = {
	.hw_rev = TYPE_G2D_3X, /* Revision 3.0 for S5PV210 and Exynos4210 */
};

static struct g2d_variant g2d_drvdata_v4x = {
	.hw_rev = TYPE_G2D_4X, /* Revision 4.1 for Exynos4X12 and Exynos5 */
};

static const struct of_device_id exynos_g2d_match[] = {
	{
		.compatible = "samsung,s5pv210-g2d",
		.data = &g2d_drvdata_v3x,
	}, {
		.compatible = "samsung,exynos4212-g2d",
		.data = &g2d_drvdata_v4x,
	},
	{},
};
MODULE_DEVICE_TABLE(of, exynos_g2d_match);

static const struct platform_device_id g2d_driver_ids[] = {
	{
		.name = "s5p-g2d",
		.driver_data = (unsigned long)&g2d_drvdata_v3x,
	}, {
		.name = "s5p-g2d-v4x",
		.driver_data = (unsigned long)&g2d_drvdata_v4x,
	},
	{},
};
MODULE_DEVICE_TABLE(platform, g2d_driver_ids);

static struct platform_driver g2d_pdrv = {
	.probe		= g2d_probe,
	.remove		= g2d_remove,
	.id_table	= g2d_driver_ids,
	.driver		= {
		.name = G2D_NAME,
		.of_match_table = exynos_g2d_match,
	},
};

module_platform_driver(g2d_pdrv);

MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
MODULE_DESCRIPTION("S5P G2D 2d graphics accelerator driver");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud