aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/omap2/dss/overlay.c
blob: 0c5bea263ac6f09df328050c14a76c01fb3dfb8a (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
/*
 * linux/drivers/video/omap2/dss/overlay.c
 *
 * Copyright (C) 2009 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * Some code and ideas taken from drivers/video/omap/ driver
 * by Imre Deak.
 *
 * 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 Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define DSS_SUBSYS_NAME "OVERLAY"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/sysfs.h>
#include <linux/kobject.h>
#include <linux/platform_device.h>
#include <linux/delay.h>

#include <plat/display.h>
#include <plat/cpu.h>

#include "dss.h"

static int num_overlays;
static struct list_head overlay_list;

static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
}

static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n",
			ovl->manager ? ovl->manager->name : "<none>");
}

static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
		size_t size)
{
	int i, r;
	struct omap_overlay_manager *mgr = NULL;
	struct omap_overlay_manager *old_mgr;
	int len = size;

	if (buf[size-1] == '\n')
		--len;

	if (len > 0) {
		for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
			mgr = omap_dss_get_overlay_manager(i);

			if (strncmp(buf, mgr->name, len) == 0)
				break;

			mgr = NULL;
		}
	}

	if (len > 0 && mgr == NULL)
		return -EINVAL;

	if (mgr)
		DSSDBG("manager %s found\n", mgr->name);

	if (mgr == ovl->manager)
		return size;

	old_mgr = ovl->manager;

	/* detach old manager */
	if (old_mgr) {
		r = ovl->unset_manager(ovl);
		if (r) {
			DSSERR("detach failed\n");
			return r;
		}

		r = old_mgr->apply(old_mgr);
		if (r)
			return r;
	}

	if (mgr) {
		r = ovl->set_manager(ovl, mgr);
		if (r) {
			DSSERR("Failed to attach overlay\n");
			return r;
		}

		r = mgr->apply(mgr);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
			ovl->info.width, ovl->info.height);
}

static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
}

static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
			ovl->info.pos_x, ovl->info.pos_y);
}

static ssize_t overlay_position_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	char *last;
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	info.pos_x = simple_strtoul(buf, &last, 10);
	++last;
	if (last - buf >= size)
		return -EINVAL;

	info.pos_y = simple_strtoul(last, &last, 10);

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
			ovl->info.out_width, ovl->info.out_height);
}

static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	char *last;
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	info.out_width = simple_strtoul(buf, &last, 10);
	++last;
	if (last - buf >= size)
		return -EINVAL;

	info.out_height = simple_strtoul(last, &last, 10);

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
}

static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
		size_t size)
{
	int r;
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	info.enabled = simple_strtoul(buf, NULL, 10);

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n",
			ovl->info.global_alpha);
}

static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
		const char *buf, size_t size)
{
	int r;
	struct omap_overlay_info info;

	ovl->get_overlay_info(ovl, &info);

	/* Video1 plane does not support global alpha
	 * to always make it 255 completely opaque
	 */
	if (ovl->id == OMAP_DSS_VIDEO1)
		info.global_alpha = 255;
	else
		info.global_alpha = simple_strtoul(buf, NULL, 10);

	r = ovl->set_overlay_info(ovl, &info);
	if (r)
		return r;

	if (ovl->manager) {
		r = ovl->manager->apply(ovl->manager);
		if (r)
			return r;
	}

	return size;
}

struct overlay_attribute {
	struct attribute attr;
	ssize_t (*show)(struct omap_overlay *, char *);
	ssize_t	(*store)(struct omap_overlay *, const char *, size_t);
};

#define OVERLAY_ATTR(_name, _mode, _show, _store) \
	struct overlay_attribute overlay_attr_##_name = \
	__ATTR(_name, _mode, _show, _store)

static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
		overlay_manager_show, overlay_manager_store);
static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
		overlay_position_show, overlay_position_store);
static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
		overlay_output_size_show, overlay_output_size_store);
static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
		overlay_enabled_show, overlay_enabled_store);
static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
		overlay_global_alpha_show, overlay_global_alpha_store);

static struct attribute *overlay_sysfs_attrs[] = {
	&overlay_attr_name.attr,
	&overlay_attr_manager.attr,
	&overlay_attr_input_size.attr,
	&overlay_attr_screen_width.attr,
	&overlay_attr_position.attr,
	&overlay_attr_output_size.attr,
	&overlay_attr_enabled.attr,
	&overlay_attr_global_alpha.attr,
	NULL
};

static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
		char *buf)
{
	struct omap_overlay *overlay;
	struct overlay_attribute *overlay_attr;

	overlay = container_of(kobj, struct omap_overlay, kobj);
	overlay_attr = container_of(attr, struct overlay_attribute, attr);

	if (!overlay_attr->show)
		return -ENOENT;

	return overlay_attr->show(overlay, buf);
}

static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
		const char *buf, size_t size)
{
	struct omap_overlay *overlay;
	struct overlay_attribute *overlay_attr;

	overlay = container_of(kobj, struct omap_overlay, kobj);
	overlay_attr = container_of(attr, struct overlay_attribute, attr);

	if (!overlay_attr->store)
		return -ENOENT;

	return overlay_attr->store(overlay, buf, size);
}

static struct sysfs_ops overlay_sysfs_ops = {
	.show = overlay_attr_show,
	.store = overlay_attr_store,
};

static struct kobj_type overlay_ktype = {
	.sysfs_ops = &overlay_sysfs_ops,
	.default_attrs = overlay_sysfs_attrs,
};

/* Check if overlay parameters are compatible with display */
int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
{
	struct omap_overlay_info *info;
	u16 outw, outh;
	u16 dw, dh;

	if (!dssdev)
		return 0;

	if (!ovl->info.enabled)
		return 0;

	info = &ovl->info;

	if (info->paddr == 0) {
		DSSDBG("check_overlay failed: paddr 0\n");
		return -EINVAL;
	}

	dssdev->driver->get_resolution(dssdev, &dw, &dh);

	DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
			ovl->id,
			info->pos_x, info->pos_y,
			info->width, info->height,
			info->out_width, info->out_height,
			dw, dh);

	if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
		outw = info->width;
		outh = info->height;
	} else {
		if (info->out_width == 0)
			outw = info->width;
		else
			outw = info->out_width;

		if (info->out_height == 0)
			outh = info->height;
		else
			outh = info->out_height;
	}

	if (dw < info->pos_x + outw) {
		DSSDBG("check_overlay failed 1: %d < %d + %d\n",
				dw, info->pos_x, outw);
		return -EINVAL;
	}

	if (dh < info->pos_y + outh) {
		DSSDBG("check_overlay failed 2: %d < %d + %d\n",
				dh, info->pos_y, outh);
		return -EINVAL;
	}

	if ((ovl->supported_modes & info->color_mode) == 0) {
		DSSERR("overlay doesn't support mode %d\n", info->color_mode);
		return -EINVAL;
	}

	return 0;
}

static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
		struct omap_overlay_info *info)
{
	int r;
	struct omap_overlay_info old_info;

	old_info = ovl->info;
	ovl->info = *info;

	if (ovl->manager) {
		r = dss_check_overlay(ovl, ovl->manager->device);
		if (r) {
			ovl->info = old_info;
			return r;
		}
	}

	ovl->info_dirty = true;

	return 0;
}

static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
		struct omap_overlay_info *info)
{
	*info = ovl->info;
}

static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
{
	return dss_mgr_wait_for_go_ovl(ovl);
}

static int omap_dss_set_manager(struct omap_overlay *ovl,
		struct omap_overlay_manager *mgr)
{
	if (!mgr)
		return -EINVAL;

	if (ovl->manager) {
		DSSERR("overlay '%s' already has a manager '%s'\n",
				ovl->name, ovl->manager->name);
		return -EINVAL;
	}

	if (ovl->info.enabled) {
		DSSERR("overlay has to be disabled to change the manager\n");
		return -EINVAL;
	}

	ovl->manager = mgr;

	dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
	/* XXX: on manual update display, in auto update mode, a bug happens
	 * here. When an overlay is first enabled on LCD, then it's disabled,
	 * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT
	 * errors. Waiting before changing the channel_out fixes it. I'm
	 * guessing that the overlay is still somehow being used for the LCD,
	 * but I don't understand how or why. */
	msleep(40);
	dispc_set_channel_out(ovl->id, mgr->id);
	dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);

	return 0;
}

static int omap_dss_unset_manager(struct omap_overlay *ovl)
{
	int r;

	if (!ovl->manager) {
		DSSERR("failed to detach overlay: manager not set\n");
		return -EINVAL;
	}

	if (ovl->info.enabled) {
		DSSERR("overlay has to be disabled to unset the manager\n");
		return -EINVAL;
	}

	r = ovl->wait_for_go(ovl);
	if (r)
		return r;

	ovl->manager = NULL;

	return 0;
}

int omap_dss_get_num_overlays(void)
{
	return num_overlays;
}
EXPORT_SYMBOL(omap_dss_get_num_overlays);

struct omap_overlay *omap_dss_get_overlay(int num)
{
	int i = 0;
	struct omap_overlay *ovl;

	list_for_each_entry(ovl, &overlay_list, list) {
		if (i++ == num)
			return ovl;
	}

	return NULL;
}
EXPORT_SYMBOL(omap_dss_get_overlay);

static void omap_dss_add_overlay(struct omap_overlay *overlay)
{
	++num_overlays;
	list_add_tail(&overlay->list, &overlay_list);
}

static struct omap_overlay *dispc_overlays[3];

void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
{
	mgr->num_overlays = 3;
	mgr->overlays = dispc_overlays;
}

#ifdef L4_EXAMPLE
static struct omap_overlay *l4_overlays[1];
void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
{
	mgr->num_overlays = 1;
	mgr->overlays = l4_overlays;
}
#endif

void dss_init_overlays(struct platform_device *pdev)
{
	int i, r;

	INIT_LIST_HEAD(&overlay_list);

	num_overlays = 0;

	for (i = 0; i < 3; ++i) {
		struct omap_overlay *ovl;
		ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);

		BUG_ON(ovl == NULL);

		switch (i) {
		case 0:
			ovl->name = "gfx";
			ovl->id = OMAP_DSS_GFX;
			ovl->supported_modes = cpu_is_omap34xx() ?
				OMAP_DSS_COLOR_GFX_OMAP3 :
				OMAP_DSS_COLOR_GFX_OMAP2;
			ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
			ovl->info.global_alpha = 255;
			break;
		case 1:
			ovl->name = "vid1";
			ovl->id = OMAP_DSS_VIDEO1;
			ovl->supported_modes = cpu_is_omap34xx() ?
				OMAP_DSS_COLOR_VID1_OMAP3 :
				OMAP_DSS_COLOR_VID_OMAP2;
			ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
				OMAP_DSS_OVL_CAP_DISPC;
			ovl->info.global_alpha = 255;
			break;
		case 2:
			ovl->name = "vid2";
			ovl->id = OMAP_DSS_VIDEO2;
			ovl->supported_modes = cpu_is_omap34xx() ?
				OMAP_DSS_COLOR_VID2_OMAP3 :
				OMAP_DSS_COLOR_VID_OMAP2;
			ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
				OMAP_DSS_OVL_CAP_DISPC;
			ovl->info.global_alpha = 255;
			break;
		}

		ovl->set_manager = &omap_dss_set_manager;
		ovl->unset_manager = &omap_dss_unset_manager;
		ovl->set_overlay_info = &dss_ovl_set_overlay_info;
		ovl->get_overlay_info = &dss_ovl_get_overlay_info;
		ovl->wait_for_go = &dss_ovl_wait_for_go;

		omap_dss_add_overlay(ovl);

		r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
				&pdev->dev.kobj, "overlay%d", i);

		if (r) {
			DSSERR("failed to create sysfs file\n");
			continue;
		}

		dispc_overlays[i] = ovl;
	}

#ifdef L4_EXAMPLE
	{
		struct omap_overlay *ovl;
		ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);

		BUG_ON(ovl == NULL);

		ovl->name = "l4";
		ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;

		ovl->set_manager = &omap_dss_set_manager;
		ovl->unset_manager = &omap_dss_unset_manager;
		ovl->set_overlay_info = &dss_ovl_set_overlay_info;
		ovl->get_overlay_info = &dss_ovl_get_overlay_info;

		omap_dss_add_overlay(ovl);

		r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
				&pdev->dev.kobj, "overlayl4");

		if (r)
			DSSERR("failed to create sysfs file\n");

		l4_overlays[0] = ovl;
	}
#endif
}

/* connect overlays to the new device, if not already connected. if force
 * selected, connect always. */
void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
{
	int i;
	struct omap_overlay_manager *lcd_mgr;
	struct omap_overlay_manager *tv_mgr;
	struct omap_overlay_manager *mgr = NULL;

	lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
	tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);

	if (dssdev->type != OMAP_DISPLAY_TYPE_VENC) {
		if (!lcd_mgr->device || force) {
			if (lcd_mgr->device)
				lcd_mgr->unset_device(lcd_mgr);
			lcd_mgr->set_device(lcd_mgr, dssdev);
			mgr = lcd_mgr;
		}
	}

	if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
		if (!tv_mgr->device || force) {
			if (tv_mgr->device)
				tv_mgr->unset_device(tv_mgr);
			tv_mgr->set_device(tv_mgr, dssdev);
			mgr = tv_mgr;
		}
	}

	if (mgr) {
		for (i = 0; i < 3; i++) {
			struct omap_overlay *ovl;
			ovl = omap_dss_get_overlay(i);
			if (!ovl->manager || force) {
				if (ovl->manager)
					omap_dss_unset_manager(ovl);
				omap_dss_set_manager(ovl, mgr);
			}
		}
	}
}

void dss_uninit_overlays(struct platform_device *pdev)
{
	struct omap_overlay *ovl;

	while (!list_empty(&overlay_list)) {
		ovl = list_first_entry(&overlay_list,
				struct omap_overlay, list);
		list_del(&ovl->list);
		kobject_del(&ovl->kobj);
		kobject_put(&ovl->kobj);
		kfree(ovl);
	}

	num_overlays = 0;
}