omapfb-ioctl.c

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