summaryrefslogtreecommitdiff
path: root/drivers/video/omap2/omapfb/omapfb-ioctl.c
blob: 574c1708f749975fb2540db3ee47c027db1e6510 (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
/*
 * linux/drivers/video/omap2/omapfb-ioctl.c
 *
 * Copyright (C) 2008 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/>.
 */

#include <linux/fb.h>
#include <linux/device.h>
#include <linux/uaccess.h>
#include <linux/platform_device.h>
#include <linux/mm.h>
#include <linux/omapfb.h>
#include <linux/vmalloc.h>
#include <linux/export.h>

#include <video/omapdss.h>
#include <plat/vrfb.h>

#include "omapfb.h"

static u8 get_mem_idx(struct omapfb_info *ofbi)
{
	if (ofbi->id == ofbi->region->id)
		return 0;

	return OMAPFB_MEM_IDX_ENABLED | ofbi->region->id;
}

static struct omapfb2_mem_region *get_mem_region(struct omapfb_info *ofbi,
						 u8 mem_idx)
{
	struct omapfb2_device *fbdev = ofbi->fbdev;

	if (mem_idx & OMAPFB_MEM_IDX_ENABLED)
		mem_idx &= OMAPFB_MEM_IDX_MASK;
	else
		mem_idx = ofbi->id;

	if (mem_idx >= fbdev->num_fbs)
		return NULL;

	return &fbdev->regions[mem_idx];
}

static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	struct omap_overlay *ovl;
	struct omap_overlay_info old_info;
	struct omapfb2_mem_region *old_rg, *new_rg;
	int r = 0;

	DBG("omapfb_setup_plane\n");

	if (ofbi->num_overlays == 0) {
		r = -EINVAL;
		goto out;
	}

	/* XXX uses only the first overlay */
	ovl = ofbi->overlays[0];

	old_rg = ofbi->region;
	new_rg = get_mem_region(ofbi, pi->mem_idx);
	if (!new_rg) {
		r = -EINVAL;
		goto out;
	}

	/* Take the locks in a specific order to keep lockdep happy */
	if (old_rg->id < new_rg->id) {
		omapfb_get_mem_region(old_rg);
		omapfb_get_mem_region(new_rg);
	} else if (new_rg->id < old_rg->id) {
		omapfb_get_mem_region(new_rg);
		omapfb_get_mem_region(old_rg);
	} else
		omapfb_get_mem_region(old_rg);

	if (pi->enabled && !new_rg->size) {
		/*
		 * This plane's memory was freed, can't enable it
		 * until it's reallocated.
		 */
		r = -EINVAL;
		goto put_mem;
	}

	ovl->get_overlay_info(ovl, &old_info);

	if (old_rg != new_rg) {
		ofbi->region = new_rg;
		set_fb_fix(fbi);
	}

	if (!pi->enabled) {
		r = ovl->disable(ovl);
		if (r)
			goto undo;
	}

	if (pi->enabled) {
		r = omapfb_setup_overlay(fbi, ovl, pi->pos_x, pi->pos_y,
			pi->out_width, pi->out_height);
		if (r)
			goto undo;
	} else {
		struct omap_overlay_info info;

		ovl->get_overlay_info(ovl, &info);

		info.pos_x = pi->pos_x;
		info.pos_y = pi->pos_y;
		info.out_width = pi->out_width;
		info.out_height = pi->out_height;

		r = ovl->set_overlay_info(ovl, &info);
		if (r)
			goto undo;
	}

	if (ovl->manager)
		ovl->manager->apply(ovl->manager);

	if (pi->enabled) {
		r = ovl->enable(ovl);
		if (r)
			goto undo;
	}

	/* Release the locks in a specific order to keep lockdep happy */
	if (old_rg->id > new_rg->id) {
		omapfb_put_mem_region(old_rg);
		omapfb_put_mem_region(new_rg);
	} else if (new_rg->id > old_rg->id) {
		omapfb_put_mem_region(new_rg);
		omapfb_put_mem_region(old_rg);
	} else
		omapfb_put_mem_region(old_rg);

	return 0;

 undo:
	if (old_rg != new_rg) {
		ofbi->region = old_rg;
		set_fb_fix(fbi);
	}

	ovl->set_overlay_info(ovl, &old_info);
 put_mem:
	/* Release the locks in a specific order to keep lockdep happy */
	if (old_rg->id > new_rg->id) {
		omapfb_put_mem_region(old_rg);
		omapfb_put_mem_region(new_rg);
	} else if (new_rg->id > old_rg->id) {
		omapfb_put_mem_region(new_rg);
		omapfb_put_mem_region(old_rg);
	} else
		omapfb_put_mem_region(old_rg);
 out:
	dev_err(fbdev->dev, "setup_plane failed\n");

	return r;
}

static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);

	if (ofbi->num_overlays == 0) {
		memset(pi, 0, sizeof(*pi));
	} else {
		struct omap_overlay *ovl;
		struct omap_overlay_info ovli;

		ovl = ofbi->overlays[0];
		ovl->get_overlay_info(ovl, &ovli);

		pi->pos_x = ovli.pos_x;
		pi->pos_y = ovli.pos_y;
		pi->enabled = ovl->is_enabled(ovl);
		pi->channel_out = 0; /* xxx */
		pi->mirror = 0;
		pi->mem_idx = get_mem_idx(ofbi);
		pi->out_width = ovli.out_width;
		pi->out_height = ovli.out_height;
	}

	return 0;
}

static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	struct omapfb2_mem_region *rg;
	int r = 0, i;
	size_t size;

	if (mi->type != OMAPFB_MEMTYPE_SDRAM)
		return -EINVAL;

	size = PAGE_ALIGN(mi->size);

	rg = ofbi->region;

	down_write_nested(&rg->lock, rg->id);
	atomic_inc(&rg->lock_count);

	if (rg->size == size && rg->type == mi->type)
		goto out;

	if (atomic_read(&rg->map_count)) {
		r = -EBUSY;
		goto out;
	}

	for (i = 0; i < fbdev->num_fbs; i++) {
		struct omapfb_info *ofbi2 = FB2OFB(fbdev->fbs[i]);
		int j;

		if (ofbi2->region != rg)
			continue;

		for (j = 0; j < ofbi2->num_overlays; j++) {
			struct omap_overlay *ovl;
			ovl = ofbi2->overlays[j];
			if (ovl->is_enabled(ovl)) {
				r = -EBUSY;
				goto out;
			}
		}
	}

	r = omapfb_realloc_fbmem(fbi, size, mi->type);
	if (r) {
		dev_err(fbdev->dev, "realloc fbmem failed\n");
		goto out;
	}

 out:
	atomic_dec(&rg->lock_count);
	up_write(&rg->lock);

	return r;
}

static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_mem_region *rg;

	rg = omapfb_get_mem_region(ofbi->region);
	memset(mi, 0, sizeof(*mi));

	mi->size = rg->size;
	mi->type = rg->type;

	omapfb_put_mem_region(rg);

	return 0;
}

static int omapfb_update_window_nolock(struct fb_info *fbi,
		u32 x, u32 y, u32 w, u32 h)
{
	struct omap_dss_device *display = fb2display(fbi);
	u16 dw, dh;

	if (!display)
		return 0;

	if (w == 0 || h == 0)
		return 0;

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

	if (x + w > dw || y + h > dh)
		return -EINVAL;

	return display->driver->update(display, x, y, w, h);
}

/* This function is exported for SGX driver use */
int omapfb_update_window(struct fb_info *fbi,
		u32 x, u32 y, u32 w, u32 h)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	int r;

	if (!lock_fb_info(fbi))
		return -ENODEV;
	omapfb_lock(fbdev);

	r = omapfb_update_window_nolock(fbi, x, y, w, h);

	omapfb_unlock(fbdev);
	unlock_fb_info(fbi);

	return r;
}
EXPORT_SYMBOL(omapfb_update_window);

int omapfb_set_update_mode(struct fb_info *fbi,
				   enum omapfb_update_mode mode)
{
	struct omap_dss_device *display = fb2display(fbi);
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	struct omapfb_display_data *d;
	int r;

	if (!display)
		return -EINVAL;

	if (mode != OMAPFB_AUTO_UPDATE && mode != OMAPFB_MANUAL_UPDATE)
		return -EINVAL;

	omapfb_lock(fbdev);

	d = get_display_data(fbdev, display);

	if (d->update_mode == mode) {
		omapfb_unlock(fbdev);
		return 0;
	}

	r = 0;

	if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
		if (mode == OMAPFB_AUTO_UPDATE)
			omapfb_start_auto_update(fbdev, display);
		else /* MANUAL_UPDATE */
			omapfb_stop_auto_update(fbdev, display);

		d->update_mode = mode;
	} else { /* AUTO_UPDATE */
		if (mode == OMAPFB_MANUAL_UPDATE)
			r = -EINVAL;
	}

	omapfb_unlock(fbdev);

	return r;
}

int omapfb_get_update_mode(struct fb_info *fbi,
		enum omapfb_update_mode *mode)
{
	struct omap_dss_device *display = fb2display(fbi);
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	struct omapfb_display_data *d;

	if (!display)
		return -EINVAL;

	omapfb_lock(fbdev);

	d = get_display_data(fbdev, display);

	*mode = d->update_mode;

	omapfb_unlock(fbdev);

	return 0;
}

/* XXX this color key handling is a hack... */
static struct omapfb_color_key omapfb_color_keys[2];

static int _omapfb_set_color_key(struct omap_overlay_manager *mgr,
		struct omapfb_color_key *ck)
{
	struct omap_overlay_manager_info info;
	enum omap_dss_trans_key_type kt;
	int r;

	mgr->get_manager_info(mgr, &info);

	if (ck->key_type == OMAPFB_COLOR_KEY_DISABLED) {
		info.trans_enabled = false;
		omapfb_color_keys[mgr->id] = *ck;

		r = mgr->set_manager_info(mgr, &info);
		if (r)
			return r;

		r = mgr->apply(mgr);

		return r;
	}

	switch (ck->key_type) {
	case OMAPFB_COLOR_KEY_GFX_DST:
		kt = OMAP_DSS_COLOR_KEY_GFX_DST;
		break;
	case OMAPFB_COLOR_KEY_VID_SRC:
		kt = OMAP_DSS_COLOR_KEY_VID_SRC;
		break;
	default:
		return -EINVAL;
	}

	info.default_color = ck->background;
	info.trans_key = ck->trans_key;
	info.trans_key_type = kt;
	info.trans_enabled = true;

	omapfb_color_keys[mgr->id] = *ck;

	r = mgr->set_manager_info(mgr, &info);
	if (r)
		return r;

	r = mgr->apply(mgr);

	return r;
}

static int omapfb_set_color_key(struct fb_info *fbi,
		struct omapfb_color_key *ck)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	int r;
	int i;
	struct omap_overlay_manager *mgr = NULL;

	omapfb_lock(fbdev);

	for (i = 0; i < ofbi->num_overlays; i++) {
		if (ofbi->overlays[i]->manager) {
			mgr = ofbi->overlays[i]->manager;
			break;
		}
	}

	if (!mgr) {
		r = -EINVAL;
		goto err;
	}

	r = _omapfb_set_color_key(mgr, ck);
err:
	omapfb_unlock(fbdev);

	return r;
}

static int omapfb_get_color_key(struct fb_info *fbi,
		struct omapfb_color_key *ck)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	struct omap_overlay_manager *mgr = NULL;
	int r = 0;
	int i;

	omapfb_lock(fbdev);

	for (i = 0; i < ofbi->num_overlays; i++) {
		if (ofbi->overlays[i]->manager) {
			mgr = ofbi->overlays[i]->manager;
			break;
		}
	}

	if (!mgr) {
		r = -EINVAL;
		goto err;
	}

	*ck = omapfb_color_keys[mgr->id];
err:
	omapfb_unlock(fbdev);

	return r;
}

static int omapfb_memory_read(struct fb_info *fbi,
		struct omapfb_memory_read *mr)
{
	struct omap_dss_device *display = fb2display(fbi);
	void *buf;
	int r;

	if (!display || !display->driver->memory_read)
		return -ENOENT;

	if (!access_ok(VERIFY_WRITE, mr->buffer, mr->buffer_size))
		return -EFAULT;

	if (mr->w * mr->h * 3 > mr->buffer_size)
		return -EINVAL;

	buf = vmalloc(mr->buffer_size);
	if (!buf) {
		DBG("vmalloc failed\n");
		return -ENOMEM;
	}

	r = display->driver->memory_read(display, buf, mr->buffer_size,
			mr->x, mr->y, mr->w, mr->h);

	if (r > 0) {
		if (copy_to_user(mr->buffer, buf, mr->buffer_size))
			r = -EFAULT;
	}

	vfree(buf);

	return r;
}

static int omapfb_get_ovl_colormode(struct omapfb2_device *fbdev,
			     struct omapfb_ovl_colormode *mode)
{
	int ovl_idx = mode->overlay_idx;
	int mode_idx = mode->mode_idx;
	struct omap_overlay *ovl;
	enum omap_color_mode supported_modes;
	struct fb_var_screeninfo var;
	int i;

	if (ovl_idx >= fbdev->num_overlays)
		return -ENODEV;
	ovl = fbdev->overlays[ovl_idx];
	supported_modes = ovl->supported_modes;

	mode_idx = mode->mode_idx;

	for (i = 0; i < sizeof(supported_modes) * 8; i++) {
		if (!(supported_modes & (1 << i)))
			continue;
		/*
		 * It's possible that the FB doesn't support a mode
		 * that is supported by the overlay, so call the
		 * following here.
		 */
		if (dss_mode_to_fb_mode(1 << i, &var) < 0)
			continue;

		mode_idx--;
		if (mode_idx < 0)
			break;
	}

	if (i == sizeof(supported_modes) * 8)
		return -ENOENT;

	mode->bits_per_pixel = var.bits_per_pixel;
	mode->nonstd = var.nonstd;
	mode->red = var.red;
	mode->green = var.green;
	mode->blue = var.blue;
	mode->transp = var.transp;

	return 0;
}

static int omapfb_wait_for_go(struct fb_info *fbi)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	int r = 0;
	int i;

	for (i = 0; i < ofbi->num_overlays; ++i) {
		struct omap_overlay *ovl = ofbi->overlays[i];
		r = ovl->wait_for_go(ovl);
		if (r)
			break;
	}

	return r;
}

int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
{
	struct omapfb_info *ofbi = FB2OFB(fbi);
	struct omapfb2_device *fbdev = ofbi->fbdev;
	struct omap_dss_device *display = fb2display(fbi);
	struct omap_overlay_manager *mgr;

	union {
		struct omapfb_update_window_old	uwnd_o;
		struct omapfb_update_window	uwnd;
		struct omapfb_plane_info	plane_info;
		struct omapfb_caps		caps;
		struct omapfb_mem_info          mem_info;
		struct omapfb_color_key		color_key;
		struct omapfb_ovl_colormode	ovl_colormode;
		enum omapfb_update_mode		update_mode;
		int test_num;
		struct omapfb_memory_read	memory_read;
		struct omapfb_vram_info		vram_info;
		struct omapfb_tearsync_info	tearsync_info;
		struct omapfb_display_info	display_info;
		u32				crt;
	} p;

	int r = 0;

	switch (cmd) {
	case OMAPFB_SYNC_GFX:
		DBG("ioctl SYNC_GFX\n");
		if (!display || !display->driver->sync) {
			/* DSS1 never returns an error here, so we neither */
			/*r = -EINVAL;*/
			break;
		}

		r = display->driver->sync(display);
		break;

	case OMAPFB_UPDATE_WINDOW_OLD:
		DBG("ioctl UPDATE_WINDOW_OLD\n");
		if (!display || !display->driver->update) {
			r = -EINVAL;
			break;
		}

		if (copy_from_user(&p.uwnd_o,
					(void __user *)arg,
					sizeof(p.uwnd_o))) {
			r = -EFAULT;
			break;
		}

		r = omapfb_update_window_nolock(fbi, p.uwnd_o.x, p.uwnd_o.y,
				p.uwnd_o.width, p.uwnd_o.height);
		break;

	case OMAPFB_UPDATE_WINDOW:
		DBG("ioctl UPDATE_WINDOW\n");
		if (!display || !display->driver->update) {
			r = -EINVAL;
			break;
		}

		if (copy_from_user(&p.uwnd, (void __user *)arg,
					sizeof(p.uwnd))) {
			r = -EFAULT;
			break;
		}

		r = omapfb_update_window_nolock(fbi, p.uwnd.x, p.uwnd.y,
				p.uwnd.width, p.uwnd.height);
		break;

	case OMAPFB_SETUP_PLANE:
		DBG("ioctl SETUP_PLANE\n");
		if (copy_from_user(&p.plane_info, (void __user *)arg,
					sizeof(p.plane_info)))
			r = -EFAULT;
		else
			r = omapfb_setup_plane(fbi, &p.plane_info);
		break;

	case OMAPFB_QUERY_PLANE:
		DBG("ioctl QUERY_PLANE\n");
		r = omapfb_query_plane(fbi, &p.plane_info);
		if (r < 0)
			break;
		if (copy_to_user((void __user *)arg, &p.plane_info,
					sizeof(p.plane_info)))
			r = -EFAULT;
		break;

	case OMAPFB_SETUP_MEM:
		DBG("ioctl SETUP_MEM\n");
		if (copy_from_user(&p.mem_info, (void __user *)arg,
					sizeof(p.mem_info)))
			r = -EFAULT;
		else
			r = omapfb_setup_mem(fbi, &p.mem_info);
		break;

	case OMAPFB_QUERY_MEM:
		DBG("ioctl QUERY_MEM\n");
		r = omapfb_query_mem(fbi, &p.mem_info);
		if (r < 0)
			break;
		if (copy_to_user((void __user *)arg, &p.mem_info,
					sizeof(p.mem_info)))
			r = -EFAULT;
		break;

	case OMAPFB_GET_CAPS:
		DBG("ioctl GET_CAPS\n");
		if (!display) {
			r = -EINVAL;
			break;
		}

		memset(&p.caps, 0, sizeof(p.caps));
		if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
			p.caps.ctrl |= OMAPFB_CAPS_MANUAL_UPDATE;
		if (display->caps & OMAP_DSS_DISPLAY_CAP_TEAR_ELIM)
			p.caps.ctrl |= OMAPFB_CAPS_TEARSYNC;

		if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
			r = -EFAULT;
		break;

	case OMAPFB_GET_OVERLAY_COLORMODE:
		DBG("ioctl GET_OVERLAY_COLORMODE\n");
		if (copy_from_user(&p.ovl_colormode, (void __user *)arg,
				   sizeof(p.ovl_colormode))) {
			r = -EFAULT;
			break;
		}
		r = omapfb_get_ovl_colormode(fbdev, &p.ovl_colormode);
		if (r < 0)
			break;
		if (copy_to_user((void __user *)arg, &p.ovl_colormode,
				 sizeof(p.ovl_colormode)))
			r = -EFAULT;
		break;

	case OMAPFB_SET_UPDATE_MODE:
		DBG("ioctl SET_UPDATE_MODE\n");
		if (get_user(p.update_mode, (int __user *)arg))
			r = -EFAULT;
		else
			r = omapfb_set_update_mode(fbi, p.update_mode);
		break;

	case OMAPFB_GET_UPDATE_MODE:
		DBG("ioctl GET_UPDATE_MODE\n");
		r = omapfb_get_update_mode(fbi, &p.update_mode);
		if (r)
			break;
		if (put_user(p.update_mode,
					(enum omapfb_update_mode __user *)arg))
			r = -EFAULT;
		break;

	case OMAPFB_SET_COLOR_KEY:
		DBG("ioctl SET_COLOR_KEY\n");
		if (copy_from_user(&p.color_key, (void __user *)arg,
				   sizeof(p.color_key)))
			r = -EFAULT;
		else
			r = omapfb_set_color_key(fbi, &p.color_key);
		break;

	case OMAPFB_GET_COLOR_KEY:
		DBG("ioctl GET_COLOR_KEY\n");
		r = omapfb_get_color_key(fbi, &p.color_key);
		if (r)
			break;
		if (copy_to_user((void __user *)arg, &p.color_key,
				 sizeof(p.color_key)))
			r = -EFAULT;
		break;

	case FBIO_WAITFORVSYNC:
		if (get_user(p.crt, (__u32 __user *)arg)) {
			r = -EFAULT;
			break;
		}
		if (p.crt != 0) {
			r = -ENODEV;
			break;
		}
		/* FALLTHROUGH */

	case OMAPFB_WAITFORVSYNC:
		DBG("ioctl WAITFORVSYNC\n");
		if (!display && !display->output && !display->output->manager) {
			r = -EINVAL;
			break;
		}

		mgr = display->output->manager;

		r = mgr->wait_for_vsync(mgr);
		break;

	case OMAPFB_WAITFORGO:
		DBG("ioctl WAITFORGO\n");
		if (!display) {
			r = -EINVAL;
			break;
		}

		r = omapfb_wait_for_go(fbi);
		break;

	/* LCD and CTRL tests do the same thing for backward
	 * compatibility */
	case OMAPFB_LCD_TEST:
		DBG("ioctl LCD_TEST\n");
		if (get_user(p.test_num, (int __user *)arg)) {
			r = -EFAULT;
			break;
		}
		if (!display || !display->driver->run_test) {
			r = -EINVAL;
			break;
		}

		r = display->driver->run_test(display, p.test_num);

		break;

	case OMAPFB_CTRL_TEST:
		DBG("ioctl CTRL_TEST\n");
		if (get_user(p.test_num, (int __user *)arg)) {
			r = -EFAULT;
			break;
		}
		if (!display || !display->driver->run_test) {
			r = -EINVAL;
			break;
		}

		r = display->driver->run_test(display, p.test_num);

		break;

	case OMAPFB_MEMORY_READ:
		DBG("ioctl MEMORY_READ\n");

		if (copy_from_user(&p.memory_read, (void __user *)arg,
					sizeof(p.memory_read))) {
			r = -EFAULT;
			break;
		}

		r = omapfb_memory_read(fbi, &p.memory_read);

		break;

	case OMAPFB_GET_VRAM_INFO: {
		DBG("ioctl GET_VRAM_INFO\n");

		/*
		 * We don't have the ability to get this vram info anymore.
		 * Fill in something that should keep the applications working.
		 */
		p.vram_info.total = SZ_1M * 64;
		p.vram_info.free = SZ_1M * 64;
		p.vram_info.largest_free_block = SZ_1M * 64;

		if (copy_to_user((void __user *)arg, &p.vram_info,
					sizeof(p.vram_info)))
			r = -EFAULT;
		break;
	}

	case OMAPFB_SET_TEARSYNC: {
		DBG("ioctl SET_TEARSYNC\n");

		if (copy_from_user(&p.tearsync_info, (void __user *)arg,
					sizeof(p.tearsync_info))) {
			r = -EFAULT;
			break;
		}

		if (!display || !display->driver->enable_te) {
			r = -ENODEV;
			break;
		}

		r = display->driver->enable_te(display,
				!!p.tearsync_info.enabled);

		break;
	}

	case OMAPFB_GET_DISPLAY_INFO: {
		u16 xres, yres;

		DBG("ioctl GET_DISPLAY_INFO\n");

		if (display == NULL) {
			r = -ENODEV;
			break;
		}

		display->driver->get_resolution(display, &xres, &yres);

		p.display_info.xres = xres;
		p.display_info.yres = yres;

		if (display->driver->get_dimensions) {
			u32 w, h;
			display->driver->get_dimensions(display, &w, &h);
			p.display_info.width = w;
			p.display_info.height = h;
		} else {
			p.display_info.width = 0;
			p.display_info.height = 0;
		}

		if (copy_to_user((void __user *)arg, &p.display_info,
					sizeof(p.display_info)))
			r = -EFAULT;
		break;
	}

	default:
		dev_err(fbdev->dev, "Unknown ioctl 0x%x\n", cmd);
		r = -EINVAL;
	}

	if (r < 0)
		DBG("ioctl failed: %d\n", r);

	return r;
}