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console: rename acquire/release_console_sem() to console_lock/unlock()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / omap2 / dss / manager.c
blob172d4e69730917e3a2a4630c8bdcaf4d24c60e92
1 /*
2 * linux/drivers/video/omap2/dss/manager.c
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6 *
7 * Some code and ideas taken from drivers/video/omap/ driver
8 * by Imre Deak.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #define DSS_SUBSYS_NAME "MANAGER"
24
25 #include <linux/kernel.h>
26 #include <linux/slab.h>
27 #include <linux/module.h>
28 #include <linux/platform_device.h>
29 #include <linux/spinlock.h>
30 #include <linux/jiffies.h>
31
32 #include <plat/display.h>
33 #include <plat/cpu.h>
34
35 #include "dss.h"
36 #include "dss_features.h"
37
38 static int num_managers;
39 static struct list_head manager_list;
40
41 static ssize_t manager_name_show(struct omap_overlay_manager *mgr, char *buf)
42 {
43 return snprintf(buf, PAGE_SIZE, "%s\n", mgr->name);
44 }
45
46 static ssize_t manager_display_show(struct omap_overlay_manager *mgr, char *buf)
47 {
48 return snprintf(buf, PAGE_SIZE, "%s\n",
49 mgr->device ? mgr->device->name : "<none>");
50 }
51
52 static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
53 const char *buf, size_t size)
54 {
55 int r = 0;
56 size_t len = size;
57 struct omap_dss_device *dssdev = NULL;
58
59 int match(struct omap_dss_device *dssdev, void *data)
60 {
61 const char *str = data;
62 return sysfs_streq(dssdev->name, str);
63 }
64
65 if (buf[size-1] == '\n')
66 --len;
67
68 if (len > 0)
69 dssdev = omap_dss_find_device((void *)buf, match);
70
71 if (len > 0 && dssdev == NULL)
72 return -EINVAL;
73
74 if (dssdev)
75 DSSDBG("display %s found\n", dssdev->name);
76
77 if (mgr->device) {
78 r = mgr->unset_device(mgr);
79 if (r) {
80 DSSERR("failed to unset display\n");
81 goto put_device;
82 }
83 }
84
85 if (dssdev) {
86 r = mgr->set_device(mgr, dssdev);
87 if (r) {
88 DSSERR("failed to set manager\n");
89 goto put_device;
90 }
91
92 r = mgr->apply(mgr);
93 if (r) {
94 DSSERR("failed to apply dispc config\n");
95 goto put_device;
96 }
97 }
98
99 put_device:
100 if (dssdev)
101 omap_dss_put_device(dssdev);
102
103 return r ? r : size;
104 }
105
106 static ssize_t manager_default_color_show(struct omap_overlay_manager *mgr,
107 char *buf)
108 {
109 return snprintf(buf, PAGE_SIZE, "%d\n", mgr->info.default_color);
110 }
111
112 static ssize_t manager_default_color_store(struct omap_overlay_manager *mgr,
113 const char *buf, size_t size)
114 {
115 struct omap_overlay_manager_info info;
116 u32 color;
117 int r;
118
119 if (sscanf(buf, "%d", &color) != 1)
120 return -EINVAL;
121
122 mgr->get_manager_info(mgr, &info);
123
124 info.default_color = color;
125
126 r = mgr->set_manager_info(mgr, &info);
127 if (r)
128 return r;
129
130 r = mgr->apply(mgr);
131 if (r)
132 return r;
133
134 return size;
135 }
136
137 static const char *trans_key_type_str[] = {
138 "gfx-destination",
139 "video-source",
140 };
141
142 static ssize_t manager_trans_key_type_show(struct omap_overlay_manager *mgr,
143 char *buf)
144 {
145 enum omap_dss_trans_key_type key_type;
146
147 key_type = mgr->info.trans_key_type;
148 BUG_ON(key_type >= ARRAY_SIZE(trans_key_type_str));
149
150 return snprintf(buf, PAGE_SIZE, "%s\n", trans_key_type_str[key_type]);
151 }
152
153 static ssize_t manager_trans_key_type_store(struct omap_overlay_manager *mgr,
154 const char *buf, size_t size)
155 {
156 enum omap_dss_trans_key_type key_type;
157 struct omap_overlay_manager_info info;
158 int r;
159
160 for (key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
161 key_type < ARRAY_SIZE(trans_key_type_str); key_type++) {
162 if (sysfs_streq(buf, trans_key_type_str[key_type]))
163 break;
164 }
165
166 if (key_type == ARRAY_SIZE(trans_key_type_str))
167 return -EINVAL;
168
169 mgr->get_manager_info(mgr, &info);
170
171 info.trans_key_type = key_type;
172
173 r = mgr->set_manager_info(mgr, &info);
174 if (r)
175 return r;
176
177 r = mgr->apply(mgr);
178 if (r)
179 return r;
180
181 return size;
182 }
183
184 static ssize_t manager_trans_key_value_show(struct omap_overlay_manager *mgr,
185 char *buf)
186 {
187 return snprintf(buf, PAGE_SIZE, "%d\n", mgr->info.trans_key);
188 }
189
190 static ssize_t manager_trans_key_value_store(struct omap_overlay_manager *mgr,
191 const char *buf, size_t size)
192 {
193 struct omap_overlay_manager_info info;
194 u32 key_value;
195 int r;
196
197 if (sscanf(buf, "%d", &key_value) != 1)
198 return -EINVAL;
199
200 mgr->get_manager_info(mgr, &info);
201
202 info.trans_key = key_value;
203
204 r = mgr->set_manager_info(mgr, &info);
205 if (r)
206 return r;
207
208 r = mgr->apply(mgr);
209 if (r)
210 return r;
211
212 return size;
213 }
214
215 static ssize_t manager_trans_key_enabled_show(struct omap_overlay_manager *mgr,
216 char *buf)
217 {
218 return snprintf(buf, PAGE_SIZE, "%d\n", mgr->info.trans_enabled);
219 }
220
221 static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
222 const char *buf, size_t size)
223 {
224 struct omap_overlay_manager_info info;
225 int enable;
226 int r;
227
228 if (sscanf(buf, "%d", &enable) != 1)
229 return -EINVAL;
230
231 mgr->get_manager_info(mgr, &info);
232
233 info.trans_enabled = enable ? true : false;
234
235 r = mgr->set_manager_info(mgr, &info);
236 if (r)
237 return r;
238
239 r = mgr->apply(mgr);
240 if (r)
241 return r;
242
243 return size;
244 }
245
246 static ssize_t manager_alpha_blending_enabled_show(
247 struct omap_overlay_manager *mgr, char *buf)
248 {
249 return snprintf(buf, PAGE_SIZE, "%d\n", mgr->info.alpha_enabled);
250 }
251
252 static ssize_t manager_alpha_blending_enabled_store(
253 struct omap_overlay_manager *mgr,
254 const char *buf, size_t size)
255 {
256 struct omap_overlay_manager_info info;
257 int enable;
258 int r;
259
260 if (sscanf(buf, "%d", &enable) != 1)
261 return -EINVAL;
262
263 mgr->get_manager_info(mgr, &info);
264
265 info.alpha_enabled = enable ? true : false;
266
267 r = mgr->set_manager_info(mgr, &info);
268 if (r)
269 return r;
270
271 r = mgr->apply(mgr);
272 if (r)
273 return r;
274
275 return size;
276 }
277
278 struct manager_attribute {
279 struct attribute attr;
280 ssize_t (*show)(struct omap_overlay_manager *, char *);
281 ssize_t (*store)(struct omap_overlay_manager *, const char *, size_t);
282 };
283
284 #define MANAGER_ATTR(_name, _mode, _show, _store) \
285 struct manager_attribute manager_attr_##_name = \
286 __ATTR(_name, _mode, _show, _store)
287
288 static MANAGER_ATTR(name, S_IRUGO, manager_name_show, NULL);
289 static MANAGER_ATTR(display, S_IRUGO|S_IWUSR,
290 manager_display_show, manager_display_store);
291 static MANAGER_ATTR(default_color, S_IRUGO|S_IWUSR,
292 manager_default_color_show, manager_default_color_store);
293 static MANAGER_ATTR(trans_key_type, S_IRUGO|S_IWUSR,
294 manager_trans_key_type_show, manager_trans_key_type_store);
295 static MANAGER_ATTR(trans_key_value, S_IRUGO|S_IWUSR,
296 manager_trans_key_value_show, manager_trans_key_value_store);
297 static MANAGER_ATTR(trans_key_enabled, S_IRUGO|S_IWUSR,
298 manager_trans_key_enabled_show,
299 manager_trans_key_enabled_store);
300 static MANAGER_ATTR(alpha_blending_enabled, S_IRUGO|S_IWUSR,
301 manager_alpha_blending_enabled_show,
302 manager_alpha_blending_enabled_store);
303
304
305 static struct attribute *manager_sysfs_attrs[] = {
306 &manager_attr_name.attr,
307 &manager_attr_display.attr,
308 &manager_attr_default_color.attr,
309 &manager_attr_trans_key_type.attr,
310 &manager_attr_trans_key_value.attr,
311 &manager_attr_trans_key_enabled.attr,
312 &manager_attr_alpha_blending_enabled.attr,
313 NULL
314 };
315
316 static ssize_t manager_attr_show(struct kobject *kobj, struct attribute *attr,
317 char *buf)
318 {
319 struct omap_overlay_manager *manager;
320 struct manager_attribute *manager_attr;
321
322 manager = container_of(kobj, struct omap_overlay_manager, kobj);
323 manager_attr = container_of(attr, struct manager_attribute, attr);
324
325 if (!manager_attr->show)
326 return -ENOENT;
327
328 return manager_attr->show(manager, buf);
329 }
330
331 static ssize_t manager_attr_store(struct kobject *kobj, struct attribute *attr,
332 const char *buf, size_t size)
333 {
334 struct omap_overlay_manager *manager;
335 struct manager_attribute *manager_attr;
336
337 manager = container_of(kobj, struct omap_overlay_manager, kobj);
338 manager_attr = container_of(attr, struct manager_attribute, attr);
339
340 if (!manager_attr->store)
341 return -ENOENT;
342
343 return manager_attr->store(manager, buf, size);
344 }
345
346 static const struct sysfs_ops manager_sysfs_ops = {
347 .show = manager_attr_show,
348 .store = manager_attr_store,
349 };
350
351 static struct kobj_type manager_ktype = {
352 .sysfs_ops = &manager_sysfs_ops,
353 .default_attrs = manager_sysfs_attrs,
354 };
355
356 /*
357 * We have 4 levels of cache for the dispc settings. First two are in SW and
358 * the latter two in HW.
359 *
360 * +--------------------+
361 * |overlay/manager_info|
362 * +--------------------+
363 * v
364 * apply()
365 * v
366 * +--------------------+
367 * | dss_cache |
368 * +--------------------+
369 * v
370 * configure()
371 * v
372 * +--------------------+
373 * | shadow registers |
374 * +--------------------+
375 * v
376 * VFP or lcd/digit_enable
377 * v
378 * +--------------------+
379 * | registers |
380 * +--------------------+
381 */
382
383 struct overlay_cache_data {
384 /* If true, cache changed, but not written to shadow registers. Set
385 * in apply(), cleared when registers written. */
386 bool dirty;
387 /* If true, shadow registers contain changed values not yet in real
388 * registers. Set when writing to shadow registers, cleared at
389 * VSYNC/EVSYNC */
390 bool shadow_dirty;
391
392 bool enabled;
393
394 u32 paddr;
395 void __iomem *vaddr;
396 u16 screen_width;
397 u16 width;
398 u16 height;
399 enum omap_color_mode color_mode;
400 u8 rotation;
401 enum omap_dss_rotation_type rotation_type;
402 bool mirror;
403
404 u16 pos_x;
405 u16 pos_y;
406 u16 out_width; /* if 0, out_width == width */
407 u16 out_height; /* if 0, out_height == height */
408 u8 global_alpha;
409 u8 pre_mult_alpha;
410
411 enum omap_channel channel;
412 bool replication;
413 bool ilace;
414
415 enum omap_burst_size burst_size;
416 u32 fifo_low;
417 u32 fifo_high;
418
419 bool manual_update;
420 };
421
422 struct manager_cache_data {
423 /* If true, cache changed, but not written to shadow registers. Set
424 * in apply(), cleared when registers written. */
425 bool dirty;
426 /* If true, shadow registers contain changed values not yet in real
427 * registers. Set when writing to shadow registers, cleared at
428 * VSYNC/EVSYNC */
429 bool shadow_dirty;
430
431 u32 default_color;
432
433 enum omap_dss_trans_key_type trans_key_type;
434 u32 trans_key;
435 bool trans_enabled;
436
437 bool alpha_enabled;
438
439 bool manual_upd_display;
440 bool manual_update;
441 bool do_manual_update;
442
443 /* manual update region */
444 u16 x, y, w, h;
445
446 /* enlarge the update area if the update area contains scaled
447 * overlays */
448 bool enlarge_update_area;
449 };
450
451 static struct {
452 spinlock_t lock;
453 struct overlay_cache_data overlay_cache[MAX_DSS_OVERLAYS];
454 struct manager_cache_data manager_cache[MAX_DSS_MANAGERS];
455
456 bool irq_enabled;
457 } dss_cache;
458
459
460
461 static int omap_dss_set_device(struct omap_overlay_manager *mgr,
462 struct omap_dss_device *dssdev)
463 {
464 int i;
465 int r;
466
467 if (dssdev->manager) {
468 DSSERR("display '%s' already has a manager '%s'\n",
469 dssdev->name, dssdev->manager->name);
470 return -EINVAL;
471 }
472
473 if ((mgr->supported_displays & dssdev->type) == 0) {
474 DSSERR("display '%s' does not support manager '%s'\n",
475 dssdev->name, mgr->name);
476 return -EINVAL;
477 }
478
479 for (i = 0; i < mgr->num_overlays; i++) {
480 struct omap_overlay *ovl = mgr->overlays[i];
481
482 if (ovl->manager != mgr || !ovl->info.enabled)
483 continue;
484
485 r = dss_check_overlay(ovl, dssdev);
486 if (r)
487 return r;
488 }
489
490 dssdev->manager = mgr;
491 mgr->device = dssdev;
492 mgr->device_changed = true;
493
494 return 0;
495 }
496
497 static int omap_dss_unset_device(struct omap_overlay_manager *mgr)
498 {
499 if (!mgr->device) {
500 DSSERR("failed to unset display, display not set.\n");
501 return -EINVAL;
502 }
503
504 mgr->device->manager = NULL;
505 mgr->device = NULL;
506 mgr->device_changed = true;
507
508 return 0;
509 }
510
511 static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
512 {
513 unsigned long timeout = msecs_to_jiffies(500);
514 u32 irq;
515
516 if (mgr->device->type == OMAP_DISPLAY_TYPE_VENC) {
517 irq = DISPC_IRQ_EVSYNC_ODD;
518 } else {
519 if (mgr->id == OMAP_DSS_CHANNEL_LCD)
520 irq = DISPC_IRQ_VSYNC;
521 else
522 irq = DISPC_IRQ_VSYNC2;
523 }
524 return omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
525 }
526
527 static int dss_mgr_wait_for_go(struct omap_overlay_manager *mgr)
528 {
529 unsigned long timeout = msecs_to_jiffies(500);
530 struct manager_cache_data *mc;
531 u32 irq;
532 int r;
533 int i;
534 struct omap_dss_device *dssdev = mgr->device;
535
536 if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
537 return 0;
538
539 if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
540 irq = DISPC_IRQ_EVSYNC_ODD | DISPC_IRQ_EVSYNC_EVEN;
541 } else {
542 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
543 enum omap_dss_update_mode mode;
544 mode = dssdev->driver->get_update_mode(dssdev);
545 if (mode != OMAP_DSS_UPDATE_AUTO)
546 return 0;
547
548 irq = (dssdev->manager->id == OMAP_DSS_CHANNEL_LCD) ?
549 DISPC_IRQ_FRAMEDONE
550 : DISPC_IRQ_FRAMEDONE2;
551 } else {
552 irq = (dssdev->manager->id == OMAP_DSS_CHANNEL_LCD) ?
553 DISPC_IRQ_VSYNC
554 : DISPC_IRQ_VSYNC2;
555 }
556 }
557
558 mc = &dss_cache.manager_cache[mgr->id];
559 i = 0;
560 while (1) {
561 unsigned long flags;
562 bool shadow_dirty, dirty;
563
564 spin_lock_irqsave(&dss_cache.lock, flags);
565 dirty = mc->dirty;
566 shadow_dirty = mc->shadow_dirty;
567 spin_unlock_irqrestore(&dss_cache.lock, flags);
568
569 if (!dirty && !shadow_dirty) {
570 r = 0;
571 break;
572 }
573
574 /* 4 iterations is the worst case:
575 * 1 - initial iteration, dirty = true (between VFP and VSYNC)
576 * 2 - first VSYNC, dirty = true
577 * 3 - dirty = false, shadow_dirty = true
578 * 4 - shadow_dirty = false */
579 if (i++ == 3) {
580 DSSERR("mgr(%d)->wait_for_go() not finishing\n",
581 mgr->id);
582 r = 0;
583 break;
584 }
585
586 r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
587 if (r == -ERESTARTSYS)
588 break;
589
590 if (r) {
591 DSSERR("mgr(%d)->wait_for_go() timeout\n", mgr->id);
592 break;
593 }
594 }
595
596 return r;
597 }
598
599 int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl)
600 {
601 unsigned long timeout = msecs_to_jiffies(500);
602 struct overlay_cache_data *oc;
603 struct omap_dss_device *dssdev;
604 u32 irq;
605 int r;
606 int i;
607
608 if (!ovl->manager)
609 return 0;
610
611 dssdev = ovl->manager->device;
612
613 if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
614 return 0;
615
616 if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
617 irq = DISPC_IRQ_EVSYNC_ODD | DISPC_IRQ_EVSYNC_EVEN;
618 } else {
619 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
620 enum omap_dss_update_mode mode;
621 mode = dssdev->driver->get_update_mode(dssdev);
622 if (mode != OMAP_DSS_UPDATE_AUTO)
623 return 0;
624
625 irq = (dssdev->manager->id == OMAP_DSS_CHANNEL_LCD) ?
626 DISPC_IRQ_FRAMEDONE
627 : DISPC_IRQ_FRAMEDONE2;
628 } else {
629 irq = (dssdev->manager->id == OMAP_DSS_CHANNEL_LCD) ?
630 DISPC_IRQ_VSYNC
631 : DISPC_IRQ_VSYNC2;
632 }
633 }
634
635 oc = &dss_cache.overlay_cache[ovl->id];
636 i = 0;
637 while (1) {
638 unsigned long flags;
639 bool shadow_dirty, dirty;
640
641 spin_lock_irqsave(&dss_cache.lock, flags);
642 dirty = oc->dirty;
643 shadow_dirty = oc->shadow_dirty;
644 spin_unlock_irqrestore(&dss_cache.lock, flags);
645
646 if (!dirty && !shadow_dirty) {
647 r = 0;
648 break;
649 }
650
651 /* 4 iterations is the worst case:
652 * 1 - initial iteration, dirty = true (between VFP and VSYNC)
653 * 2 - first VSYNC, dirty = true
654 * 3 - dirty = false, shadow_dirty = true
655 * 4 - shadow_dirty = false */
656 if (i++ == 3) {
657 DSSERR("ovl(%d)->wait_for_go() not finishing\n",
658 ovl->id);
659 r = 0;
660 break;
661 }
662
663 r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
664 if (r == -ERESTARTSYS)
665 break;
666
667 if (r) {
668 DSSERR("ovl(%d)->wait_for_go() timeout\n", ovl->id);
669 break;
670 }
671 }
672
673 return r;
674 }
675
676 static int overlay_enabled(struct omap_overlay *ovl)
677 {
678 return ovl->info.enabled && ovl->manager && ovl->manager->device;
679 }
680
681 /* Is rect1 a subset of rect2? */
682 static bool rectangle_subset(int x1, int y1, int w1, int h1,
683 int x2, int y2, int w2, int h2)
684 {
685 if (x1 < x2 || y1 < y2)
686 return false;
687
688 if (x1 + w1 > x2 + w2)
689 return false;
690
691 if (y1 + h1 > y2 + h2)
692 return false;
693
694 return true;
695 }
696
697 /* Do rect1 and rect2 overlap? */
698 static bool rectangle_intersects(int x1, int y1, int w1, int h1,
699 int x2, int y2, int w2, int h2)
700 {
701 if (x1 >= x2 + w2)
702 return false;
703
704 if (x2 >= x1 + w1)
705 return false;
706
707 if (y1 >= y2 + h2)
708 return false;
709
710 if (y2 >= y1 + h1)
711 return false;
712
713 return true;
714 }
715
716 static bool dispc_is_overlay_scaled(struct overlay_cache_data *oc)
717 {
718 if (oc->out_width != 0 && oc->width != oc->out_width)
719 return true;
720
721 if (oc->out_height != 0 && oc->height != oc->out_height)
722 return true;
723
724 return false;
725 }
726
727 static int configure_overlay(enum omap_plane plane)
728 {
729 struct overlay_cache_data *c;
730 struct manager_cache_data *mc;
731 u16 outw, outh;
732 u16 x, y, w, h;
733 u32 paddr;
734 int r;
735 u16 orig_w, orig_h, orig_outw, orig_outh;
736
737 DSSDBGF("%d", plane);
738
739 c = &dss_cache.overlay_cache[plane];
740
741 if (!c->enabled) {
742 dispc_enable_plane(plane, 0);
743 return 0;
744 }
745
746 mc = &dss_cache.manager_cache[c->channel];
747
748 x = c->pos_x;
749 y = c->pos_y;
750 w = c->width;
751 h = c->height;
752 outw = c->out_width == 0 ? c->width : c->out_width;
753 outh = c->out_height == 0 ? c->height : c->out_height;
754 paddr = c->paddr;
755
756 orig_w = w;
757 orig_h = h;
758 orig_outw = outw;
759 orig_outh = outh;
760
761 if (c->manual_update && mc->do_manual_update) {
762 unsigned bpp;
763 unsigned scale_x_m = w, scale_x_d = outw;
764 unsigned scale_y_m = h, scale_y_d = outh;
765
766 /* If the overlay is outside the update region, disable it */
767 if (!rectangle_intersects(mc->x, mc->y, mc->w, mc->h,
768 x, y, outw, outh)) {
769 dispc_enable_plane(plane, 0);
770 return 0;
771 }
772
773 switch (c->color_mode) {
774 case OMAP_DSS_COLOR_RGB16:
775 case OMAP_DSS_COLOR_ARGB16:
776 case OMAP_DSS_COLOR_YUV2:
777 case OMAP_DSS_COLOR_UYVY:
778 bpp = 16;
779 break;
780
781 case OMAP_DSS_COLOR_RGB24P:
782 bpp = 24;
783 break;
784
785 case OMAP_DSS_COLOR_RGB24U:
786 case OMAP_DSS_COLOR_ARGB32:
787 case OMAP_DSS_COLOR_RGBA32:
788 case OMAP_DSS_COLOR_RGBX32:
789 bpp = 32;
790 break;
791
792 default:
793 BUG();
794 }
795
796 if (mc->x > c->pos_x) {
797 x = 0;
798 outw -= (mc->x - c->pos_x);
799 paddr += (mc->x - c->pos_x) *
800 scale_x_m / scale_x_d * bpp / 8;
801 } else {
802 x = c->pos_x - mc->x;
803 }
804
805 if (mc->y > c->pos_y) {
806 y = 0;
807 outh -= (mc->y - c->pos_y);
808 paddr += (mc->y - c->pos_y) *
809 scale_y_m / scale_y_d *
810 c->screen_width * bpp / 8;
811 } else {
812 y = c->pos_y - mc->y;
813 }
814
815 if (mc->w < (x + outw))
816 outw -= (x + outw) - (mc->w);
817
818 if (mc->h < (y + outh))
819 outh -= (y + outh) - (mc->h);
820
821 w = w * outw / orig_outw;
822 h = h * outh / orig_outh;
823
824 /* YUV mode overlay's input width has to be even and the
825 * algorithm above may adjust the width to be odd.
826 *
827 * Here we adjust the width if needed, preferring to increase
828 * the width if the original width was bigger.
829 */
830 if ((w & 1) &&
831 (c->color_mode == OMAP_DSS_COLOR_YUV2 ||
832 c->color_mode == OMAP_DSS_COLOR_UYVY)) {
833 if (orig_w > w)
834 w += 1;
835 else
836 w -= 1;
837 }
838 }
839
840 r = dispc_setup_plane(plane,
841 paddr,
842 c->screen_width,
843 x, y,
844 w, h,
845 outw, outh,
846 c->color_mode,
847 c->ilace,
848 c->rotation_type,
849 c->rotation,
850 c->mirror,
851 c->global_alpha,
852 c->pre_mult_alpha,
853 c->channel);
854
855 if (r) {
856 /* this shouldn't happen */
857 DSSERR("dispc_setup_plane failed for ovl %d\n", plane);
858 dispc_enable_plane(plane, 0);
859 return r;
860 }
861
862 dispc_enable_replication(plane, c->replication);
863
864 dispc_set_burst_size(plane, c->burst_size);
865 dispc_setup_plane_fifo(plane, c->fifo_low, c->fifo_high);
866
867 dispc_enable_plane(plane, 1);
868
869 return 0;
870 }
871
872 static void configure_manager(enum omap_channel channel)
873 {
874 struct manager_cache_data *c;
875
876 DSSDBGF("%d", channel);
877
878 c = &dss_cache.manager_cache[channel];
879
880 dispc_set_default_color(channel, c->default_color);
881 dispc_set_trans_key(channel, c->trans_key_type, c->trans_key);
882 dispc_enable_trans_key(channel, c->trans_enabled);
883 dispc_enable_alpha_blending(channel, c->alpha_enabled);
884 }
885
886 /* configure_dispc() tries to write values from cache to shadow registers.
887 * It writes only to those managers/overlays that are not busy.
888 * returns 0 if everything could be written to shadow registers.
889 * returns 1 if not everything could be written to shadow registers. */
890 static int configure_dispc(void)
891 {
892 struct overlay_cache_data *oc;
893 struct manager_cache_data *mc;
894 const int num_ovls = dss_feat_get_num_ovls();
895 const int num_mgrs = dss_feat_get_num_mgrs();
896 int i;
897 int r;
898 bool mgr_busy[MAX_DSS_MANAGERS];
899 bool mgr_go[MAX_DSS_MANAGERS];
900 bool busy;
901
902 r = 0;
903 busy = false;
904
905 for (i = 0; i < num_mgrs; i++) {
906 mgr_busy[i] = dispc_go_busy(i);
907 mgr_go[i] = false;
908 }
909
910 /* Commit overlay settings */
911 for (i = 0; i < num_ovls; ++i) {
912 oc = &dss_cache.overlay_cache[i];
913 mc = &dss_cache.manager_cache[oc->channel];
914
915 if (!oc->dirty)
916 continue;
917
918 if (oc->manual_update && !mc->do_manual_update)
919 continue;
920
921 if (mgr_busy[oc->channel]) {
922 busy = true;
923 continue;
924 }
925
926 r = configure_overlay(i);
927 if (r)
928 DSSERR("configure_overlay %d failed\n", i);
929
930 oc->dirty = false;
931 oc->shadow_dirty = true;
932 mgr_go[oc->channel] = true;
933 }
934
935 /* Commit manager settings */
936 for (i = 0; i < num_mgrs; ++i) {
937 mc = &dss_cache.manager_cache[i];
938
939 if (!mc->dirty)
940 continue;
941
942 if (mc->manual_update && !mc->do_manual_update)
943 continue;
944
945 if (mgr_busy[i]) {
946 busy = true;
947 continue;
948 }
949
950 configure_manager(i);
951 mc->dirty = false;
952 mc->shadow_dirty = true;
953 mgr_go[i] = true;
954 }
955
956 /* set GO */
957 for (i = 0; i < num_mgrs; ++i) {
958 mc = &dss_cache.manager_cache[i];
959
960 if (!mgr_go[i])
961 continue;
962
963 /* We don't need GO with manual update display. LCD iface will
964 * always be turned off after frame, and new settings will be
965 * taken in to use at next update */
966 if (!mc->manual_upd_display)
967 dispc_go(i);
968 }
969
970 if (busy)
971 r = 1;
972 else
973 r = 0;
974
975 return r;
976 }
977
978 /* Make the coordinates even. There are some strange problems with OMAP and
979 * partial DSI update when the update widths are odd. */
980 static void make_even(u16 *x, u16 *w)
981 {
982 u16 x1, x2;
983
984 x1 = *x;
985 x2 = *x + *w;
986
987 x1 &= ~1;
988 x2 = ALIGN(x2, 2);
989
990 *x = x1;
991 *w = x2 - x1;
992 }
993
994 /* Configure dispc for partial update. Return possibly modified update
995 * area */
996 void dss_setup_partial_planes(struct omap_dss_device *dssdev,
997 u16 *xi, u16 *yi, u16 *wi, u16 *hi, bool enlarge_update_area)
998 {
999 struct overlay_cache_data *oc;
1000 struct manager_cache_data *mc;
1001 const int num_ovls = dss_feat_get_num_ovls();
1002 struct omap_overlay_manager *mgr;
1003 int i;
1004 u16 x, y, w, h;
1005 unsigned long flags;
1006 bool area_changed;
1007
1008 x = *xi;
1009 y = *yi;
1010 w = *wi;
1011 h = *hi;
1012
1013 DSSDBG("dispc_setup_partial_planes %d,%d %dx%d\n",
1014 *xi, *yi, *wi, *hi);
1015
1016 mgr = dssdev->manager;
1017
1018 if (!mgr) {
1019 DSSDBG("no manager\n");
1020 return;
1021 }
1022
1023 make_even(&x, &w);
1024
1025 spin_lock_irqsave(&dss_cache.lock, flags);
1026
1027 /*
1028 * Execute the outer loop until the inner loop has completed
1029 * once without increasing the update area. This will ensure that
1030 * all scaled overlays end up completely within the update area.
1031 */
1032 do {
1033 area_changed = false;
1034
1035 /* We need to show the whole overlay if it is scaled. So look
1036 * for those, and make the update area larger if found.
1037 * Also mark the overlay cache dirty */
1038 for (i = 0; i < num_ovls; ++i) {
1039 unsigned x1, y1, x2, y2;
1040 unsigned outw, outh;
1041
1042 oc = &dss_cache.overlay_cache[i];
1043
1044 if (oc->channel != mgr->id)
1045 continue;
1046
1047 oc->dirty = true;
1048
1049 if (!enlarge_update_area)
1050 continue;
1051
1052 if (!oc->enabled)
1053 continue;
1054
1055 if (!dispc_is_overlay_scaled(oc))
1056 continue;
1057
1058 outw = oc->out_width == 0 ?
1059 oc->width : oc->out_width;
1060 outh = oc->out_height == 0 ?
1061 oc->height : oc->out_height;
1062
1063 /* is the overlay outside the update region? */
1064 if (!rectangle_intersects(x, y, w, h,
1065 oc->pos_x, oc->pos_y,
1066 outw, outh))
1067 continue;
1068
1069 /* if the overlay totally inside the update region? */
1070 if (rectangle_subset(oc->pos_x, oc->pos_y, outw, outh,
1071 x, y, w, h))
1072 continue;
1073
1074 if (x > oc->pos_x)
1075 x1 = oc->pos_x;
1076 else
1077 x1 = x;
1078
1079 if (y > oc->pos_y)
1080 y1 = oc->pos_y;
1081 else
1082 y1 = y;
1083
1084 if ((x + w) < (oc->pos_x + outw))
1085 x2 = oc->pos_x + outw;
1086 else
1087 x2 = x + w;
1088
1089 if ((y + h) < (oc->pos_y + outh))
1090 y2 = oc->pos_y + outh;
1091 else
1092 y2 = y + h;
1093
1094 x = x1;
1095 y = y1;
1096 w = x2 - x1;
1097 h = y2 - y1;
1098
1099 make_even(&x, &w);
1100
1101 DSSDBG("changing upd area due to ovl(%d) "
1102 "scaling %d,%d %dx%d\n",
1103 i, x, y, w, h);
1104
1105 area_changed = true;
1106 }
1107 } while (area_changed);
1108
1109 mc = &dss_cache.manager_cache[mgr->id];
1110 mc->do_manual_update = true;
1111 mc->enlarge_update_area = enlarge_update_area;
1112 mc->x = x;
1113 mc->y = y;
1114 mc->w = w;
1115 mc->h = h;
1116
1117 configure_dispc();
1118
1119 mc->do_manual_update = false;
1120
1121 spin_unlock_irqrestore(&dss_cache.lock, flags);
1122
1123 *xi = x;
1124 *yi = y;
1125 *wi = w;
1126 *hi = h;
1127 }
1128
1129 void dss_start_update(struct omap_dss_device *dssdev)
1130 {
1131 struct manager_cache_data *mc;
1132 struct overlay_cache_data *oc;
1133 const int num_ovls = dss_feat_get_num_ovls();
1134 const int num_mgrs = dss_feat_get_num_mgrs();
1135 struct omap_overlay_manager *mgr;
1136 int i;
1137
1138 mgr = dssdev->manager;
1139
1140 for (i = 0; i < num_ovls; ++i) {
1141 oc = &dss_cache.overlay_cache[i];
1142 if (oc->channel != mgr->id)
1143 continue;
1144
1145 oc->shadow_dirty = false;
1146 }
1147
1148 for (i = 0; i < num_mgrs; ++i) {
1149 mc = &dss_cache.manager_cache[i];
1150 if (mgr->id != i)
1151 continue;
1152
1153 mc->shadow_dirty = false;
1154 }
1155
1156 dssdev->manager->enable(dssdev->manager);
1157 }
1158
1159 static void dss_apply_irq_handler(void *data, u32 mask)
1160 {
1161 struct manager_cache_data *mc;
1162 struct overlay_cache_data *oc;
1163 const int num_ovls = dss_feat_get_num_ovls();
1164 const int num_mgrs = dss_feat_get_num_mgrs();
1165 int i, r;
1166 bool mgr_busy[MAX_DSS_MANAGERS];
1167 u32 irq_mask;
1168
1169 for (i = 0; i < num_mgrs; i++)
1170 mgr_busy[i] = dispc_go_busy(i);
1171
1172 spin_lock(&dss_cache.lock);
1173
1174 for (i = 0; i < num_ovls; ++i) {
1175 oc = &dss_cache.overlay_cache[i];
1176 if (!mgr_busy[oc->channel])
1177 oc->shadow_dirty = false;
1178 }
1179
1180 for (i = 0; i < num_mgrs; ++i) {
1181 mc = &dss_cache.manager_cache[i];
1182 if (!mgr_busy[i])
1183 mc->shadow_dirty = false;
1184 }
1185
1186 r = configure_dispc();
1187 if (r == 1)
1188 goto end;
1189
1190 /* re-read busy flags */
1191 for (i = 0; i < num_mgrs; i++)
1192 mgr_busy[i] = dispc_go_busy(i);
1193
1194 /* keep running as long as there are busy managers, so that
1195 * we can collect overlay-applied information */
1196 for (i = 0; i < num_mgrs; ++i) {
1197 if (mgr_busy[i])
1198 goto end;
1199 }
1200
1201 irq_mask = DISPC_IRQ_VSYNC | DISPC_IRQ_EVSYNC_ODD |
1202 DISPC_IRQ_EVSYNC_EVEN;
1203 if (dss_has_feature(FEAT_MGR_LCD2))
1204 irq_mask |= DISPC_IRQ_VSYNC2;
1205
1206 omap_dispc_unregister_isr(dss_apply_irq_handler, NULL, irq_mask);
1207 dss_cache.irq_enabled = false;
1208
1209 end:
1210 spin_unlock(&dss_cache.lock);
1211 }
1212
1213 static int omap_dss_mgr_apply(struct omap_overlay_manager *mgr)
1214 {
1215 struct overlay_cache_data *oc;
1216 struct manager_cache_data *mc;
1217 int i;
1218 struct omap_overlay *ovl;
1219 int num_planes_enabled = 0;
1220 bool use_fifomerge;
1221 unsigned long flags;
1222 int r;
1223
1224 DSSDBG("omap_dss_mgr_apply(%s)\n", mgr->name);
1225
1226 spin_lock_irqsave(&dss_cache.lock, flags);
1227
1228 /* Configure overlays */
1229 for (i = 0; i < omap_dss_get_num_overlays(); ++i) {
1230 struct omap_dss_device *dssdev;
1231
1232 ovl = omap_dss_get_overlay(i);
1233
1234 if (!(ovl->caps & OMAP_DSS_OVL_CAP_DISPC))
1235 continue;
1236
1237 oc = &dss_cache.overlay_cache[ovl->id];
1238
1239 if (!overlay_enabled(ovl)) {
1240 if (oc->enabled) {
1241 oc->enabled = false;
1242 oc->dirty = true;
1243 }
1244 continue;
1245 }
1246
1247 if (!ovl->info_dirty) {
1248 if (oc->enabled)
1249 ++num_planes_enabled;
1250 continue;
1251 }
1252
1253 dssdev = ovl->manager->device;
1254
1255 if (dss_check_overlay(ovl, dssdev)) {
1256 if (oc->enabled) {
1257 oc->enabled = false;
1258 oc->dirty = true;
1259 }
1260 continue;
1261 }
1262
1263 ovl->info_dirty = false;
1264 oc->dirty = true;
1265
1266 oc->paddr = ovl->info.paddr;
1267 oc->vaddr = ovl->info.vaddr;
1268 oc->screen_width = ovl->info.screen_width;
1269 oc->width = ovl->info.width;
1270 oc->height = ovl->info.height;
1271 oc->color_mode = ovl->info.color_mode;
1272 oc->rotation = ovl->info.rotation;
1273 oc->rotation_type = ovl->info.rotation_type;
1274 oc->mirror = ovl->info.mirror;
1275 oc->pos_x = ovl->info.pos_x;
1276 oc->pos_y = ovl->info.pos_y;
1277 oc->out_width = ovl->info.out_width;
1278 oc->out_height = ovl->info.out_height;
1279 oc->global_alpha = ovl->info.global_alpha;
1280 oc->pre_mult_alpha = ovl->info.pre_mult_alpha;
1281
1282 oc->replication =
1283 dss_use_replication(dssdev, ovl->info.color_mode);
1284
1285 oc->ilace = dssdev->type == OMAP_DISPLAY_TYPE_VENC;
1286
1287 oc->channel = ovl->manager->id;
1288
1289 oc->enabled = true;
1290
1291 oc->manual_update =
1292 dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE &&
1293 dssdev->driver->get_update_mode(dssdev) !=
1294 OMAP_DSS_UPDATE_AUTO;
1295
1296 ++num_planes_enabled;
1297 }
1298
1299 /* Configure managers */
1300 list_for_each_entry(mgr, &manager_list, list) {
1301 struct omap_dss_device *dssdev;
1302
1303 if (!(mgr->caps & OMAP_DSS_OVL_MGR_CAP_DISPC))
1304 continue;
1305
1306 mc = &dss_cache.manager_cache[mgr->id];
1307
1308 if (mgr->device_changed) {
1309 mgr->device_changed = false;
1310 mgr->info_dirty = true;
1311 }
1312
1313 if (!mgr->info_dirty)
1314 continue;
1315
1316 if (!mgr->device)
1317 continue;
1318
1319 dssdev = mgr->device;
1320
1321 mgr->info_dirty = false;
1322 mc->dirty = true;
1323
1324 mc->default_color = mgr->info.default_color;
1325 mc->trans_key_type = mgr->info.trans_key_type;
1326 mc->trans_key = mgr->info.trans_key;
1327 mc->trans_enabled = mgr->info.trans_enabled;
1328 mc->alpha_enabled = mgr->info.alpha_enabled;
1329
1330 mc->manual_upd_display =
1331 dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
1332
1333 mc->manual_update =
1334 dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE &&
1335 dssdev->driver->get_update_mode(dssdev) !=
1336 OMAP_DSS_UPDATE_AUTO;
1337 }
1338
1339 /* XXX TODO: Try to get fifomerge working. The problem is that it
1340 * affects both managers, not individually but at the same time. This
1341 * means the change has to be well synchronized. I guess the proper way
1342 * is to have a two step process for fifo merge:
1343 * fifomerge enable:
1344 * 1. disable other planes, leaving one plane enabled
1345 * 2. wait until the planes are disabled on HW
1346 * 3. config merged fifo thresholds, enable fifomerge
1347 * fifomerge disable:
1348 * 1. config unmerged fifo thresholds, disable fifomerge
1349 * 2. wait until fifo changes are in HW
1350 * 3. enable planes
1351 */
1352 use_fifomerge = false;
1353
1354 /* Configure overlay fifos */
1355 for (i = 0; i < omap_dss_get_num_overlays(); ++i) {
1356 struct omap_dss_device *dssdev;
1357 u32 size;
1358
1359 ovl = omap_dss_get_overlay(i);
1360
1361 if (!(ovl->caps & OMAP_DSS_OVL_CAP_DISPC))
1362 continue;
1363
1364 oc = &dss_cache.overlay_cache[ovl->id];
1365
1366 if (!oc->enabled)
1367 continue;
1368
1369 dssdev = ovl->manager->device;
1370
1371 size = dispc_get_plane_fifo_size(ovl->id);
1372 if (use_fifomerge)
1373 size *= 3;
1374
1375 switch (dssdev->type) {
1376 case OMAP_DISPLAY_TYPE_DPI:
1377 case OMAP_DISPLAY_TYPE_DBI:
1378 case OMAP_DISPLAY_TYPE_SDI:
1379 case OMAP_DISPLAY_TYPE_VENC:
1380 default_get_overlay_fifo_thresholds(ovl->id, size,
1381 &oc->burst_size, &oc->fifo_low,
1382 &oc->fifo_high);
1383 break;
1384 #ifdef CONFIG_OMAP2_DSS_DSI
1385 case OMAP_DISPLAY_TYPE_DSI:
1386 dsi_get_overlay_fifo_thresholds(ovl->id, size,
1387 &oc->burst_size, &oc->fifo_low,
1388 &oc->fifo_high);
1389 break;
1390 #endif
1391 default:
1392 BUG();
1393 }
1394 }
1395
1396 r = 0;
1397 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
1398 if (!dss_cache.irq_enabled) {
1399 u32 mask;
1400
1401 mask = DISPC_IRQ_VSYNC | DISPC_IRQ_EVSYNC_ODD |
1402 DISPC_IRQ_EVSYNC_EVEN;
1403 if (dss_has_feature(FEAT_MGR_LCD2))
1404 mask |= DISPC_IRQ_VSYNC2;
1405
1406 r = omap_dispc_register_isr(dss_apply_irq_handler, NULL, mask);
1407 dss_cache.irq_enabled = true;
1408 }
1409 configure_dispc();
1410 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
1411
1412 spin_unlock_irqrestore(&dss_cache.lock, flags);
1413
1414 return r;
1415 }
1416
1417 static int dss_check_manager(struct omap_overlay_manager *mgr)
1418 {
1419 /* OMAP supports only graphics source transparency color key and alpha
1420 * blending simultaneously. See TRM 15.4.2.4.2.2 Alpha Mode */
1421
1422 if (mgr->info.alpha_enabled && mgr->info.trans_enabled &&
1423 mgr->info.trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST)
1424 return -EINVAL;
1425
1426 return 0;
1427 }
1428
1429 static int omap_dss_mgr_set_info(struct omap_overlay_manager *mgr,
1430 struct omap_overlay_manager_info *info)
1431 {
1432 int r;
1433 struct omap_overlay_manager_info old_info;
1434
1435 old_info = mgr->info;
1436 mgr->info = *info;
1437
1438 r = dss_check_manager(mgr);
1439 if (r) {
1440 mgr->info = old_info;
1441 return r;
1442 }
1443
1444 mgr->info_dirty = true;
1445
1446 return 0;
1447 }
1448
1449 static void omap_dss_mgr_get_info(struct omap_overlay_manager *mgr,
1450 struct omap_overlay_manager_info *info)
1451 {
1452 *info = mgr->info;
1453 }
1454
1455 static int dss_mgr_enable(struct omap_overlay_manager *mgr)
1456 {
1457 dispc_enable_channel(mgr->id, 1);
1458 return 0;
1459 }
1460
1461 static int dss_mgr_disable(struct omap_overlay_manager *mgr)
1462 {
1463 dispc_enable_channel(mgr->id, 0);
1464 return 0;
1465 }
1466
1467 static void omap_dss_add_overlay_manager(struct omap_overlay_manager *manager)
1468 {
1469 ++num_managers;
1470 list_add_tail(&manager->list, &manager_list);
1471 }
1472
1473 int dss_init_overlay_managers(struct platform_device *pdev)
1474 {
1475 int i, r;
1476
1477 spin_lock_init(&dss_cache.lock);
1478
1479 INIT_LIST_HEAD(&manager_list);
1480
1481 num_managers = 0;
1482
1483 for (i = 0; i < dss_feat_get_num_mgrs(); ++i) {
1484 struct omap_overlay_manager *mgr;
1485 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
1486
1487 BUG_ON(mgr == NULL);
1488
1489 switch (i) {
1490 case 0:
1491 mgr->name = "lcd";
1492 mgr->id = OMAP_DSS_CHANNEL_LCD;
1493 break;
1494 case 1:
1495 mgr->name = "tv";
1496 mgr->id = OMAP_DSS_CHANNEL_DIGIT;
1497 break;
1498 case 2:
1499 mgr->name = "lcd2";
1500 mgr->id = OMAP_DSS_CHANNEL_LCD2;
1501 break;
1502 }
1503
1504 mgr->set_device = &omap_dss_set_device;
1505 mgr->unset_device = &omap_dss_unset_device;
1506 mgr->apply = &omap_dss_mgr_apply;
1507 mgr->set_manager_info = &omap_dss_mgr_set_info;
1508 mgr->get_manager_info = &omap_dss_mgr_get_info;
1509 mgr->wait_for_go = &dss_mgr_wait_for_go;
1510 mgr->wait_for_vsync = &dss_mgr_wait_for_vsync;
1511
1512 mgr->enable = &dss_mgr_enable;
1513 mgr->disable = &dss_mgr_disable;
1514
1515 mgr->caps = OMAP_DSS_OVL_MGR_CAP_DISPC;
1516 mgr->supported_displays =
1517 dss_feat_get_supported_displays(mgr->id);
1518
1519 dss_overlay_setup_dispc_manager(mgr);
1520
1521 omap_dss_add_overlay_manager(mgr);
1522
1523 r = kobject_init_and_add(&mgr->kobj, &manager_ktype,
1524 &pdev->dev.kobj, "manager%d", i);
1525
1526 if (r) {
1527 DSSERR("failed to create sysfs file\n");
1528 continue;
1529 }
1530 }
1531
1532 #ifdef L4_EXAMPLE
1533 {
1534 int omap_dss_mgr_apply_l4(struct omap_overlay_manager *mgr)
1535 {
1536 DSSDBG("omap_dss_mgr_apply_l4(%s)\n", mgr->name);
1537
1538 return 0;
1539 }
1540
1541 struct omap_overlay_manager *mgr;
1542 mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
1543
1544 BUG_ON(mgr == NULL);
1545
1546 mgr->name = "l4";
1547 mgr->supported_displays =
1548 OMAP_DISPLAY_TYPE_DBI | OMAP_DISPLAY_TYPE_DSI;
1549
1550 mgr->set_device = &omap_dss_set_device;
1551 mgr->unset_device = &omap_dss_unset_device;
1552 mgr->apply = &omap_dss_mgr_apply_l4;
1553 mgr->set_manager_info = &omap_dss_mgr_set_info;
1554 mgr->get_manager_info = &omap_dss_mgr_get_info;
1555
1556 dss_overlay_setup_l4_manager(mgr);
1557
1558 omap_dss_add_overlay_manager(mgr);
1559
1560 r = kobject_init_and_add(&mgr->kobj, &manager_ktype,
1561 &pdev->dev.kobj, "managerl4");
1562
1563 if (r)
1564 DSSERR("failed to create sysfs file\n");
1565 }
1566 #endif
1567
1568 return 0;
1569 }
1570
1571 void dss_uninit_overlay_managers(struct platform_device *pdev)
1572 {
1573 struct omap_overlay_manager *mgr;
1574
1575 while (!list_empty(&manager_list)) {
1576 mgr = list_first_entry(&manager_list,
1577 struct omap_overlay_manager, list);
1578 list_del(&mgr->list);
1579 kobject_del(&mgr->kobj);
1580 kobject_put(&mgr->kobj);
1581 kfree(mgr);
1582 }
1583
1584 num_managers = 0;
1585 }
1586
1587 int omap_dss_get_num_overlay_managers(void)
1588 {
1589 return num_managers;
1590 }
1591 EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
1592
1593 struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
1594 {
1595 int i = 0;
1596 struct omap_overlay_manager *mgr;
1597
1598 list_for_each_entry(mgr, &manager_list, list) {
1599 if (i++ == num)
1600 return mgr;
1601 }
1602
1603 return NULL;
1604 }
1605 EXPORT_SYMBOL(omap_dss_get_overlay_manager);
1606
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree