1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * linux/drivers/video/omap2/omapfb-ioctl.c
4  *
5  * Copyright (C) 2008 Nokia Corporation
6  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7  *
8  * Some code and ideas taken from drivers/video/omap/ driver
9  * by Imre Deak.
10  */
11 
12 #include <linux/fb.h>
13 #include <linux/device.h>
14 #include <linux/uaccess.h>
15 #include <linux/platform_device.h>
16 #include <linux/mm.h>
17 #include <linux/omapfb.h>
18 #include <linux/vmalloc.h>
19 #include <linux/export.h>
20 #include <linux/sizes.h>
21 
22 #include <video/omapfb_dss.h>
23 #include <video/omapvrfb.h>
24 
25 #include "omapfb.h"
26 
27 static u8 get_mem_idx(struct omapfb_info *ofbi)
28 {
29 	if (ofbi->id == ofbi->region->id)
30 		return 0;
31 
32 	return OMAPFB_MEM_IDX_ENABLED | ofbi->region->id;
33 }
34 
35 static struct omapfb2_mem_region *get_mem_region(struct omapfb_info *ofbi,
36 						 u8 mem_idx)
37 {
38 	struct omapfb2_device *fbdev = ofbi->fbdev;
39 
40 	if (mem_idx & OMAPFB_MEM_IDX_ENABLED)
41 		mem_idx &= OMAPFB_MEM_IDX_MASK;
42 	else
43 		mem_idx = ofbi->id;
44 
45 	if (mem_idx >= fbdev->num_fbs)
46 		return NULL;
47 
48 	return &fbdev->regions[mem_idx];
49 }
50 
51 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
52 {
53 	struct omapfb_info *ofbi = FB2OFB(fbi);
54 	struct omapfb2_device *fbdev = ofbi->fbdev;
55 	struct omap_overlay *ovl;
56 	struct omap_overlay_info old_info;
57 	struct omapfb2_mem_region *old_rg, *new_rg;
58 	int r = 0;
59 
60 	DBG("omapfb_setup_plane\n");
61 
62 	if (ofbi->num_overlays == 0) {
63 		r = -EINVAL;
64 		goto out;
65 	}
66 
67 	/* XXX uses only the first overlay */
68 	ovl = ofbi->overlays[0];
69 
70 	old_rg = ofbi->region;
71 	new_rg = get_mem_region(ofbi, pi->mem_idx);
72 	if (!new_rg) {
73 		r = -EINVAL;
74 		goto out;
75 	}
76 
77 	/* Take the locks in a specific order to keep lockdep happy */
78 	if (old_rg->id < new_rg->id) {
79 		omapfb_get_mem_region(old_rg);
80 		omapfb_get_mem_region(new_rg);
81 	} else if (new_rg->id < old_rg->id) {
82 		omapfb_get_mem_region(new_rg);
83 		omapfb_get_mem_region(old_rg);
84 	} else
85 		omapfb_get_mem_region(old_rg);
86 
87 	if (pi->enabled && !new_rg->size) {
88 		/*
89 		 * This plane's memory was freed, can't enable it
90 		 * until it's reallocated.
91 		 */
92 		r = -EINVAL;
93 		goto put_mem;
94 	}
95 
96 	ovl->get_overlay_info(ovl, &old_info);
97 
98 	if (old_rg != new_rg) {
99 		ofbi->region = new_rg;
100 		set_fb_fix(fbi);
101 	}
102 
103 	if (!pi->enabled) {
104 		r = ovl->disable(ovl);
105 		if (r)
106 			goto undo;
107 	}
108 
109 	if (pi->enabled) {
110 		r = omapfb_setup_overlay(fbi, ovl, pi->pos_x, pi->pos_y,
111 			pi->out_width, pi->out_height);
112 		if (r)
113 			goto undo;
114 	} else {
115 		struct omap_overlay_info info;
116 
117 		ovl->get_overlay_info(ovl, &info);
118 
119 		info.pos_x = pi->pos_x;
120 		info.pos_y = pi->pos_y;
121 		info.out_width = pi->out_width;
122 		info.out_height = pi->out_height;
123 
124 		r = ovl->set_overlay_info(ovl, &info);
125 		if (r)
126 			goto undo;
127 	}
128 
129 	if (ovl->manager) {
130 		r = ovl->manager->apply(ovl->manager);
131 		if (r)
132 			goto undo;
133 	}
134 
135 	if (pi->enabled) {
136 		r = ovl->enable(ovl);
137 		if (r)
138 			goto undo;
139 	}
140 
141 	/* Release the locks in a specific order to keep lockdep happy */
142 	if (old_rg->id > new_rg->id) {
143 		omapfb_put_mem_region(old_rg);
144 		omapfb_put_mem_region(new_rg);
145 	} else if (new_rg->id > old_rg->id) {
146 		omapfb_put_mem_region(new_rg);
147 		omapfb_put_mem_region(old_rg);
148 	} else
149 		omapfb_put_mem_region(old_rg);
150 
151 	return 0;
152 
153  undo:
154 	if (old_rg != new_rg) {
155 		ofbi->region = old_rg;
156 		set_fb_fix(fbi);
157 	}
158 
159 	ovl->set_overlay_info(ovl, &old_info);
160  put_mem:
161 	/* Release the locks in a specific order to keep lockdep happy */
162 	if (old_rg->id > new_rg->id) {
163 		omapfb_put_mem_region(old_rg);
164 		omapfb_put_mem_region(new_rg);
165 	} else if (new_rg->id > old_rg->id) {
166 		omapfb_put_mem_region(new_rg);
167 		omapfb_put_mem_region(old_rg);
168 	} else
169 		omapfb_put_mem_region(old_rg);
170  out:
171 	dev_err(fbdev->dev, "setup_plane failed\n");
172 
173 	return r;
174 }
175 
176 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
177 {
178 	struct omapfb_info *ofbi = FB2OFB(fbi);
179 
180 	if (ofbi->num_overlays == 0) {
181 		memset(pi, 0, sizeof(*pi));
182 	} else {
183 		struct omap_overlay *ovl;
184 		struct omap_overlay_info ovli;
185 
186 		ovl = ofbi->overlays[0];
187 		ovl->get_overlay_info(ovl, &ovli);
188 
189 		pi->pos_x = ovli.pos_x;
190 		pi->pos_y = ovli.pos_y;
191 		pi->enabled = ovl->is_enabled(ovl);
192 		pi->channel_out = 0; /* xxx */
193 		pi->mirror = 0;
194 		pi->mem_idx = get_mem_idx(ofbi);
195 		pi->out_width = ovli.out_width;
196 		pi->out_height = ovli.out_height;
197 	}
198 
199 	return 0;
200 }
201 
202 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
203 {
204 	struct omapfb_info *ofbi = FB2OFB(fbi);
205 	struct omapfb2_device *fbdev = ofbi->fbdev;
206 	struct omap_dss_device *display = fb2display(fbi);
207 	struct omapfb2_mem_region *rg;
208 	int r = 0, i;
209 	size_t size;
210 
211 	if (mi->type != OMAPFB_MEMTYPE_SDRAM)
212 		return -EINVAL;
213 
214 	size = PAGE_ALIGN(mi->size);
215 
216 	if (display && display->driver->sync)
217 		display->driver->sync(display);
218 
219 	rg = ofbi->region;
220 
221 	down_write_nested(&rg->lock, rg->id);
222 	atomic_inc(&rg->lock_count);
223 
224 	if (rg->size == size && rg->type == mi->type)
225 		goto out;
226 
227 	if (atomic_read(&rg->map_count)) {
228 		r = -EBUSY;
229 		goto out;
230 	}
231 
232 	for (i = 0; i < fbdev->num_fbs; i++) {
233 		struct omapfb_info *ofbi2 = FB2OFB(fbdev->fbs[i]);
234 		int j;
235 
236 		if (ofbi2->region != rg)
237 			continue;
238 
239 		for (j = 0; j < ofbi2->num_overlays; j++) {
240 			struct omap_overlay *ovl;
241 			ovl = ofbi2->overlays[j];
242 			if (ovl->is_enabled(ovl)) {
243 				r = -EBUSY;
244 				goto out;
245 			}
246 		}
247 	}
248 
249 	r = omapfb_realloc_fbmem(fbi, size, mi->type);
250 	if (r) {
251 		dev_err(fbdev->dev, "realloc fbmem failed\n");
252 		goto out;
253 	}
254 
255  out:
256 	atomic_dec(&rg->lock_count);
257 	up_write(&rg->lock);
258 
259 	return r;
260 }
261 
262 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
263 {
264 	struct omapfb_info *ofbi = FB2OFB(fbi);
265 	struct omapfb2_mem_region *rg;
266 
267 	rg = omapfb_get_mem_region(ofbi->region);
268 	memset(mi, 0, sizeof(*mi));
269 
270 	mi->size = rg->size;
271 	mi->type = rg->type;
272 
273 	omapfb_put_mem_region(rg);
274 
275 	return 0;
276 }
277 
278 static int omapfb_update_window(struct fb_info *fbi,
279 		u32 x, u32 y, u32 w, u32 h)
280 {
281 	struct omap_dss_device *display = fb2display(fbi);
282 	u16 dw, dh;
283 
284 	if (!display)
285 		return 0;
286 
287 	if (w == 0 || h == 0)
288 		return 0;
289 
290 	display->driver->get_resolution(display, &dw, &dh);
291 
292 	if (x + w > dw || y + h > dh)
293 		return -EINVAL;
294 
295 	return display->driver->update(display, x, y, w, h);
296 }
297 
298 int omapfb_set_update_mode(struct fb_info *fbi,
299 				   enum omapfb_update_mode mode)
300 {
301 	struct omap_dss_device *display = fb2display(fbi);
302 	struct omapfb_info *ofbi = FB2OFB(fbi);
303 	struct omapfb2_device *fbdev = ofbi->fbdev;
304 	struct omapfb_display_data *d;
305 	int r;
306 
307 	if (!display)
308 		return -EINVAL;
309 
310 	if (mode != OMAPFB_AUTO_UPDATE && mode != OMAPFB_MANUAL_UPDATE)
311 		return -EINVAL;
312 
313 	omapfb_lock(fbdev);
314 
315 	d = get_display_data(fbdev, display);
316 
317 	if (d->update_mode == mode) {
318 		omapfb_unlock(fbdev);
319 		return 0;
320 	}
321 
322 	r = 0;
323 
324 	if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
325 		if (mode == OMAPFB_AUTO_UPDATE)
326 			omapfb_start_auto_update(fbdev, display);
327 		else /* MANUAL_UPDATE */
328 			omapfb_stop_auto_update(fbdev, display);
329 
330 		d->update_mode = mode;
331 	} else { /* AUTO_UPDATE */
332 		if (mode == OMAPFB_MANUAL_UPDATE)
333 			r = -EINVAL;
334 	}
335 
336 	omapfb_unlock(fbdev);
337 
338 	return r;
339 }
340 
341 int omapfb_get_update_mode(struct fb_info *fbi,
342 		enum omapfb_update_mode *mode)
343 {
344 	struct omap_dss_device *display = fb2display(fbi);
345 	struct omapfb_info *ofbi = FB2OFB(fbi);
346 	struct omapfb2_device *fbdev = ofbi->fbdev;
347 	struct omapfb_display_data *d;
348 
349 	if (!display)
350 		return -EINVAL;
351 
352 	omapfb_lock(fbdev);
353 
354 	d = get_display_data(fbdev, display);
355 
356 	*mode = d->update_mode;
357 
358 	omapfb_unlock(fbdev);
359 
360 	return 0;
361 }
362 
363 /* XXX this color key handling is a hack... */
364 static struct omapfb_color_key omapfb_color_keys[2];
365 
366 static int _omapfb_set_color_key(struct omap_overlay_manager *mgr,
367 		struct omapfb_color_key *ck)
368 {
369 	struct omap_overlay_manager_info info;
370 	enum omap_dss_trans_key_type kt;
371 	int r;
372 
373 	mgr->get_manager_info(mgr, &info);
374 
375 	if (ck->key_type == OMAPFB_COLOR_KEY_DISABLED) {
376 		info.trans_enabled = false;
377 		omapfb_color_keys[mgr->id] = *ck;
378 
379 		r = mgr->set_manager_info(mgr, &info);
380 		if (r)
381 			return r;
382 
383 		r = mgr->apply(mgr);
384 
385 		return r;
386 	}
387 
388 	switch (ck->key_type) {
389 	case OMAPFB_COLOR_KEY_GFX_DST:
390 		kt = OMAP_DSS_COLOR_KEY_GFX_DST;
391 		break;
392 	case OMAPFB_COLOR_KEY_VID_SRC:
393 		kt = OMAP_DSS_COLOR_KEY_VID_SRC;
394 		break;
395 	default:
396 		return -EINVAL;
397 	}
398 
399 	info.default_color = ck->background;
400 	info.trans_key = ck->trans_key;
401 	info.trans_key_type = kt;
402 	info.trans_enabled = true;
403 
404 	omapfb_color_keys[mgr->id] = *ck;
405 
406 	r = mgr->set_manager_info(mgr, &info);
407 	if (r)
408 		return r;
409 
410 	r = mgr->apply(mgr);
411 
412 	return r;
413 }
414 
415 static int omapfb_set_color_key(struct fb_info *fbi,
416 		struct omapfb_color_key *ck)
417 {
418 	struct omapfb_info *ofbi = FB2OFB(fbi);
419 	struct omapfb2_device *fbdev = ofbi->fbdev;
420 	int r;
421 	int i;
422 	struct omap_overlay_manager *mgr = NULL;
423 
424 	omapfb_lock(fbdev);
425 
426 	for (i = 0; i < ofbi->num_overlays; i++) {
427 		if (ofbi->overlays[i]->manager) {
428 			mgr = ofbi->overlays[i]->manager;
429 			break;
430 		}
431 	}
432 
433 	if (!mgr) {
434 		r = -EINVAL;
435 		goto err;
436 	}
437 
438 	r = _omapfb_set_color_key(mgr, ck);
439 err:
440 	omapfb_unlock(fbdev);
441 
442 	return r;
443 }
444 
445 static int omapfb_get_color_key(struct fb_info *fbi,
446 		struct omapfb_color_key *ck)
447 {
448 	struct omapfb_info *ofbi = FB2OFB(fbi);
449 	struct omapfb2_device *fbdev = ofbi->fbdev;
450 	struct omap_overlay_manager *mgr = NULL;
451 	int r = 0;
452 	int i;
453 
454 	omapfb_lock(fbdev);
455 
456 	for (i = 0; i < ofbi->num_overlays; i++) {
457 		if (ofbi->overlays[i]->manager) {
458 			mgr = ofbi->overlays[i]->manager;
459 			break;
460 		}
461 	}
462 
463 	if (!mgr) {
464 		r = -EINVAL;
465 		goto err;
466 	}
467 
468 	*ck = omapfb_color_keys[mgr->id];
469 err:
470 	omapfb_unlock(fbdev);
471 
472 	return r;
473 }
474 
475 static int omapfb_memory_read(struct fb_info *fbi,
476 		struct omapfb_memory_read *mr)
477 {
478 	struct omap_dss_device *display = fb2display(fbi);
479 	void *buf;
480 	int r;
481 
482 	if (!display || !display->driver->memory_read)
483 		return -ENOENT;
484 
485 	if (mr->w > 4096 || mr->h > 4096)
486 		return -EINVAL;
487 
488 	if (mr->w * mr->h * 3 > mr->buffer_size)
489 		return -EINVAL;
490 
491 	buf = vmalloc(mr->buffer_size);
492 	if (!buf) {
493 		DBG("vmalloc failed\n");
494 		return -ENOMEM;
495 	}
496 
497 	r = display->driver->memory_read(display, buf, mr->buffer_size,
498 			mr->x, mr->y, mr->w, mr->h);
499 
500 	if (r > 0) {
501 		if (copy_to_user(mr->buffer, buf, r))
502 			r = -EFAULT;
503 	}
504 
505 	vfree(buf);
506 
507 	return r;
508 }
509 
510 static int omapfb_get_ovl_colormode(struct omapfb2_device *fbdev,
511 			     struct omapfb_ovl_colormode *mode)
512 {
513 	int ovl_idx = mode->overlay_idx;
514 	int mode_idx = mode->mode_idx;
515 	struct omap_overlay *ovl;
516 	enum omap_color_mode supported_modes;
517 	struct fb_var_screeninfo var;
518 	int i;
519 
520 	if (ovl_idx >= fbdev->num_overlays)
521 		return -ENODEV;
522 	ovl = fbdev->overlays[ovl_idx];
523 	supported_modes = ovl->supported_modes;
524 
525 	mode_idx = mode->mode_idx;
526 
527 	for (i = 0; i < sizeof(supported_modes) * 8; i++) {
528 		if (!(supported_modes & (1 << i)))
529 			continue;
530 		/*
531 		 * It's possible that the FB doesn't support a mode
532 		 * that is supported by the overlay, so call the
533 		 * following here.
534 		 */
535 		if (dss_mode_to_fb_mode(1 << i, &var) < 0)
536 			continue;
537 
538 		mode_idx--;
539 		if (mode_idx < 0)
540 			break;
541 	}
542 
543 	if (i == sizeof(supported_modes) * 8)
544 		return -ENOENT;
545 
546 	mode->bits_per_pixel = var.bits_per_pixel;
547 	mode->nonstd = var.nonstd;
548 	mode->red = var.red;
549 	mode->green = var.green;
550 	mode->blue = var.blue;
551 	mode->transp = var.transp;
552 
553 	return 0;
554 }
555 
556 static int omapfb_wait_for_go(struct fb_info *fbi)
557 {
558 	struct omapfb_info *ofbi = FB2OFB(fbi);
559 	int r = 0;
560 	int i;
561 
562 	for (i = 0; i < ofbi->num_overlays; ++i) {
563 		struct omap_overlay *ovl = ofbi->overlays[i];
564 		r = ovl->wait_for_go(ovl);
565 		if (r)
566 			break;
567 	}
568 
569 	return r;
570 }
571 
572 int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
573 {
574 	struct omapfb_info *ofbi = FB2OFB(fbi);
575 	struct omapfb2_device *fbdev = ofbi->fbdev;
576 	struct omap_dss_device *display = fb2display(fbi);
577 	struct omap_overlay_manager *mgr;
578 
579 	union {
580 		struct omapfb_update_window_old	uwnd_o;
581 		struct omapfb_update_window	uwnd;
582 		struct omapfb_plane_info	plane_info;
583 		struct omapfb_caps		caps;
584 		struct omapfb_mem_info          mem_info;
585 		struct omapfb_color_key		color_key;
586 		struct omapfb_ovl_colormode	ovl_colormode;
587 		enum omapfb_update_mode		update_mode;
588 		int test_num;
589 		struct omapfb_memory_read	memory_read;
590 		struct omapfb_vram_info		vram_info;
591 		struct omapfb_tearsync_info	tearsync_info;
592 		struct omapfb_display_info	display_info;
593 		u32				crt;
594 	} p;
595 
596 	int r = 0;
597 
598 	memset(&p, 0, sizeof(p));
599 
600 	switch (cmd) {
601 	case OMAPFB_SYNC_GFX:
602 		DBG("ioctl SYNC_GFX\n");
603 		if (!display || !display->driver->sync) {
604 			/* DSS1 never returns an error here, so we neither */
605 			/*r = -EINVAL;*/
606 			break;
607 		}
608 
609 		r = display->driver->sync(display);
610 		break;
611 
612 	case OMAPFB_UPDATE_WINDOW_OLD:
613 		DBG("ioctl UPDATE_WINDOW_OLD\n");
614 		if (!display || !display->driver->update) {
615 			r = -EINVAL;
616 			break;
617 		}
618 
619 		if (copy_from_user(&p.uwnd_o,
620 					(void __user *)arg,
621 					sizeof(p.uwnd_o))) {
622 			r = -EFAULT;
623 			break;
624 		}
625 
626 		r = omapfb_update_window(fbi, p.uwnd_o.x, p.uwnd_o.y,
627 				p.uwnd_o.width, p.uwnd_o.height);
628 		break;
629 
630 	case OMAPFB_UPDATE_WINDOW:
631 		DBG("ioctl UPDATE_WINDOW\n");
632 		if (!display || !display->driver->update) {
633 			r = -EINVAL;
634 			break;
635 		}
636 
637 		if (copy_from_user(&p.uwnd, (void __user *)arg,
638 					sizeof(p.uwnd))) {
639 			r = -EFAULT;
640 			break;
641 		}
642 
643 		r = omapfb_update_window(fbi, p.uwnd.x, p.uwnd.y,
644 				p.uwnd.width, p.uwnd.height);
645 		break;
646 
647 	case OMAPFB_SETUP_PLANE:
648 		DBG("ioctl SETUP_PLANE\n");
649 		if (copy_from_user(&p.plane_info, (void __user *)arg,
650 					sizeof(p.plane_info)))
651 			r = -EFAULT;
652 		else
653 			r = omapfb_setup_plane(fbi, &p.plane_info);
654 		break;
655 
656 	case OMAPFB_QUERY_PLANE:
657 		DBG("ioctl QUERY_PLANE\n");
658 		r = omapfb_query_plane(fbi, &p.plane_info);
659 		if (r < 0)
660 			break;
661 		if (copy_to_user((void __user *)arg, &p.plane_info,
662 					sizeof(p.plane_info)))
663 			r = -EFAULT;
664 		break;
665 
666 	case OMAPFB_SETUP_MEM:
667 		DBG("ioctl SETUP_MEM\n");
668 		if (copy_from_user(&p.mem_info, (void __user *)arg,
669 					sizeof(p.mem_info)))
670 			r = -EFAULT;
671 		else
672 			r = omapfb_setup_mem(fbi, &p.mem_info);
673 		break;
674 
675 	case OMAPFB_QUERY_MEM:
676 		DBG("ioctl QUERY_MEM\n");
677 		r = omapfb_query_mem(fbi, &p.mem_info);
678 		if (r < 0)
679 			break;
680 		if (copy_to_user((void __user *)arg, &p.mem_info,
681 					sizeof(p.mem_info)))
682 			r = -EFAULT;
683 		break;
684 
685 	case OMAPFB_GET_CAPS:
686 		DBG("ioctl GET_CAPS\n");
687 		if (!display) {
688 			r = -EINVAL;
689 			break;
690 		}
691 
692 		memset(&p.caps, 0, sizeof(p.caps));
693 		if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
694 			p.caps.ctrl |= OMAPFB_CAPS_MANUAL_UPDATE;
695 		if (display->caps & OMAP_DSS_DISPLAY_CAP_TEAR_ELIM)
696 			p.caps.ctrl |= OMAPFB_CAPS_TEARSYNC;
697 
698 		if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
699 			r = -EFAULT;
700 		break;
701 
702 	case OMAPFB_GET_OVERLAY_COLORMODE:
703 		DBG("ioctl GET_OVERLAY_COLORMODE\n");
704 		if (copy_from_user(&p.ovl_colormode, (void __user *)arg,
705 				   sizeof(p.ovl_colormode))) {
706 			r = -EFAULT;
707 			break;
708 		}
709 		r = omapfb_get_ovl_colormode(fbdev, &p.ovl_colormode);
710 		if (r < 0)
711 			break;
712 		if (copy_to_user((void __user *)arg, &p.ovl_colormode,
713 				 sizeof(p.ovl_colormode)))
714 			r = -EFAULT;
715 		break;
716 
717 	case OMAPFB_SET_UPDATE_MODE:
718 		DBG("ioctl SET_UPDATE_MODE\n");
719 		if (get_user(p.update_mode, (int __user *)arg))
720 			r = -EFAULT;
721 		else
722 			r = omapfb_set_update_mode(fbi, p.update_mode);
723 		break;
724 
725 	case OMAPFB_GET_UPDATE_MODE:
726 		DBG("ioctl GET_UPDATE_MODE\n");
727 		r = omapfb_get_update_mode(fbi, &p.update_mode);
728 		if (r)
729 			break;
730 		if (put_user(p.update_mode,
731 					(enum omapfb_update_mode __user *)arg))
732 			r = -EFAULT;
733 		break;
734 
735 	case OMAPFB_SET_COLOR_KEY:
736 		DBG("ioctl SET_COLOR_KEY\n");
737 		if (copy_from_user(&p.color_key, (void __user *)arg,
738 				   sizeof(p.color_key)))
739 			r = -EFAULT;
740 		else
741 			r = omapfb_set_color_key(fbi, &p.color_key);
742 		break;
743 
744 	case OMAPFB_GET_COLOR_KEY:
745 		DBG("ioctl GET_COLOR_KEY\n");
746 		r = omapfb_get_color_key(fbi, &p.color_key);
747 		if (r)
748 			break;
749 		if (copy_to_user((void __user *)arg, &p.color_key,
750 				 sizeof(p.color_key)))
751 			r = -EFAULT;
752 		break;
753 
754 	case FBIO_WAITFORVSYNC:
755 		if (get_user(p.crt, (__u32 __user *)arg)) {
756 			r = -EFAULT;
757 			break;
758 		}
759 		if (p.crt != 0) {
760 			r = -ENODEV;
761 			break;
762 		}
763 		fallthrough;
764 
765 	case OMAPFB_WAITFORVSYNC:
766 		DBG("ioctl WAITFORVSYNC\n");
767 
768 		if (!display) {
769 			r = -EINVAL;
770 			break;
771 		}
772 
773 		mgr = omapdss_find_mgr_from_display(display);
774 		if (!mgr) {
775 			r = -EINVAL;
776 			break;
777 		}
778 
779 		r = mgr->wait_for_vsync(mgr);
780 		break;
781 
782 	case OMAPFB_WAITFORGO:
783 		DBG("ioctl WAITFORGO\n");
784 		if (!display) {
785 			r = -EINVAL;
786 			break;
787 		}
788 
789 		r = omapfb_wait_for_go(fbi);
790 		break;
791 
792 	/* LCD and CTRL tests do the same thing for backward
793 	 * compatibility */
794 	case OMAPFB_LCD_TEST:
795 		DBG("ioctl LCD_TEST\n");
796 		if (get_user(p.test_num, (int __user *)arg)) {
797 			r = -EFAULT;
798 			break;
799 		}
800 		if (!display || !display->driver->run_test) {
801 			r = -EINVAL;
802 			break;
803 		}
804 
805 		r = display->driver->run_test(display, p.test_num);
806 
807 		break;
808 
809 	case OMAPFB_CTRL_TEST:
810 		DBG("ioctl CTRL_TEST\n");
811 		if (get_user(p.test_num, (int __user *)arg)) {
812 			r = -EFAULT;
813 			break;
814 		}
815 		if (!display || !display->driver->run_test) {
816 			r = -EINVAL;
817 			break;
818 		}
819 
820 		r = display->driver->run_test(display, p.test_num);
821 
822 		break;
823 
824 	case OMAPFB_MEMORY_READ:
825 		DBG("ioctl MEMORY_READ\n");
826 
827 		if (copy_from_user(&p.memory_read, (void __user *)arg,
828 					sizeof(p.memory_read))) {
829 			r = -EFAULT;
830 			break;
831 		}
832 
833 		r = omapfb_memory_read(fbi, &p.memory_read);
834 
835 		break;
836 
837 	case OMAPFB_GET_VRAM_INFO: {
838 		DBG("ioctl GET_VRAM_INFO\n");
839 
840 		/*
841 		 * We don't have the ability to get this vram info anymore.
842 		 * Fill in something that should keep the applications working.
843 		 */
844 		p.vram_info.total = SZ_1M * 64;
845 		p.vram_info.free = SZ_1M * 64;
846 		p.vram_info.largest_free_block = SZ_1M * 64;
847 
848 		if (copy_to_user((void __user *)arg, &p.vram_info,
849 					sizeof(p.vram_info)))
850 			r = -EFAULT;
851 		break;
852 	}
853 
854 	case OMAPFB_SET_TEARSYNC: {
855 		DBG("ioctl SET_TEARSYNC\n");
856 
857 		if (copy_from_user(&p.tearsync_info, (void __user *)arg,
858 					sizeof(p.tearsync_info))) {
859 			r = -EFAULT;
860 			break;
861 		}
862 
863 		if (!display || !display->driver->enable_te) {
864 			r = -ENODEV;
865 			break;
866 		}
867 
868 		r = display->driver->enable_te(display,
869 				!!p.tearsync_info.enabled);
870 
871 		break;
872 	}
873 
874 	case OMAPFB_GET_DISPLAY_INFO: {
875 		u16 xres, yres;
876 
877 		DBG("ioctl GET_DISPLAY_INFO\n");
878 
879 		if (display == NULL) {
880 			r = -ENODEV;
881 			break;
882 		}
883 
884 		display->driver->get_resolution(display, &xres, &yres);
885 
886 		p.display_info.xres = xres;
887 		p.display_info.yres = yres;
888 
889 		if (display->driver->get_dimensions) {
890 			u32 w, h;
891 			display->driver->get_dimensions(display, &w, &h);
892 			p.display_info.width = w;
893 			p.display_info.height = h;
894 		} else {
895 			p.display_info.width = 0;
896 			p.display_info.height = 0;
897 		}
898 
899 		if (copy_to_user((void __user *)arg, &p.display_info,
900 					sizeof(p.display_info)))
901 			r = -EFAULT;
902 		break;
903 	}
904 
905 	default:
906 		dev_err(fbdev->dev, "Unknown ioctl 0x%x\n", cmd);
907 		r = -EINVAL;
908 	}
909 
910 	if (r < 0)
911 		DBG("ioctl failed: %d\n", r);
912 
913 	return r;
914 }
915 
916 
917