0a0b084ce65d626ca7619f81065b914d4286bb89
[android-sdk/kernel-video.git] / drivers / video / fbdev / omap2 / dss / apply.c
1 /*
2  * Copyright (C) 2011 Texas Instruments
3  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 as published by
7  * the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
18 #define DSS_SUBSYS_NAME "APPLY"
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/spinlock.h>
24 #include <linux/jiffies.h>
26 #include <video/omapdss.h>
28 #include "dss.h"
29 #include "dss_features.h"
30 #include "dispc-compat.h"
32 /*
33  * We have 4 levels of cache for the dispc settings. First two are in SW and
34  * the latter two in HW.
35  *
36  *       set_info()
37  *          v
38  * +--------------------+
39  * |     user_info      |
40  * +--------------------+
41  *          v
42  *        apply()
43  *          v
44  * +--------------------+
45  * |       info         |
46  * +--------------------+
47  *          v
48  *      write_regs()
49  *          v
50  * +--------------------+
51  * |  shadow registers  |
52  * +--------------------+
53  *          v
54  * VFP or lcd/digit_enable
55  *          v
56  * +--------------------+
57  * |      registers     |
58  * +--------------------+
59  */
61 struct ovl_priv_data {
63         bool user_info_dirty;
64         struct omap_overlay_info user_info;
66         bool info_dirty;
67         struct omap_overlay_info info;
69         bool shadow_info_dirty;
71         bool extra_info_dirty;
72         bool shadow_extra_info_dirty;
74         bool enabled;
75         u32 fifo_low, fifo_high;
77         /*
78          * True if overlay is to be enabled. Used to check and calculate configs
79          * for the overlay before it is enabled in the HW.
80          */
81         bool enabling;
82 };
84 struct mgr_priv_data {
86         bool user_info_dirty;
87         struct omap_overlay_manager_info user_info;
89         bool info_dirty;
90         struct omap_overlay_manager_info info;
92         bool shadow_info_dirty;
94         /* If true, GO bit is up and shadow registers cannot be written.
95          * Never true for manual update displays */
96         bool busy;
98         /* If true, dispc output is enabled */
99         bool updating;
101         /* If true, a display is enabled using this manager */
102         bool enabled;
104         bool extra_info_dirty;
105         bool shadow_extra_info_dirty;
107         struct omap_video_timings timings;
108         struct dss_lcd_mgr_config lcd_config;
110         void (*framedone_handler)(void *);
111         void *framedone_handler_data;
112 };
114 static struct {
115         struct ovl_priv_data ovl_priv_data_array[MAX_DSS_OVERLAYS];
116         struct mgr_priv_data mgr_priv_data_array[MAX_DSS_MANAGERS];
118         bool irq_enabled;
119 } dss_data;
121 /* protects dss_data */
122 static spinlock_t data_lock;
123 /* lock for blocking functions */
124 static DEFINE_MUTEX(apply_lock);
125 static DECLARE_COMPLETION(extra_updated_completion);
127 static void dss_register_vsync_isr(void);
129 static struct ovl_priv_data *get_ovl_priv(struct omap_overlay *ovl)
131         return &dss_data.ovl_priv_data_array[ovl->id];
134 static struct mgr_priv_data *get_mgr_priv(struct omap_overlay_manager *mgr)
136         return &dss_data.mgr_priv_data_array[mgr->id];
139 static void apply_init_priv(void)
141         const int num_ovls = dss_feat_get_num_ovls();
142         struct mgr_priv_data *mp;
143         int i;
145         spin_lock_init(&data_lock);
147         for (i = 0; i < num_ovls; ++i) {
148                 struct ovl_priv_data *op;
150                 op = &dss_data.ovl_priv_data_array[i];
152                 op->info.color_mode = OMAP_DSS_COLOR_RGB16;
153                 op->info.rotation_type = OMAP_DSS_ROT_DMA;
155                 op->info.global_alpha = 255;
157                 switch (i) {
158                 case 0:
159                         op->info.zorder = 0;
160                         break;
161                 case 1:
162                         op->info.zorder =
163                                 dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 3 : 0;
164                         break;
165                 case 2:
166                         op->info.zorder =
167                                 dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 2 : 0;
168                         break;
169                 case 3:
170                         op->info.zorder =
171                                 dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 1 : 0;
172                         break;
173                 }
175                 op->user_info = op->info;
176         }
178         /*
179          * Initialize some of the lcd_config fields for TV manager, this lets
180          * us prevent checking if the manager is LCD or TV at some places
181          */
182         mp = &dss_data.mgr_priv_data_array[OMAP_DSS_CHANNEL_DIGIT];
184         mp->lcd_config.video_port_width = 24;
185         mp->lcd_config.clock_info.lck_div = 1;
186         mp->lcd_config.clock_info.pck_div = 1;
189 /*
190  * A LCD manager's stallmode decides whether it is in manual or auto update. TV
191  * manager is always auto update, stallmode field for TV manager is false by
192  * default
193  */
194 static bool ovl_manual_update(struct omap_overlay *ovl)
196         struct mgr_priv_data *mp = get_mgr_priv(ovl->manager);
198         return mp->lcd_config.stallmode;
201 static bool mgr_manual_update(struct omap_overlay_manager *mgr)
203         struct mgr_priv_data *mp = get_mgr_priv(mgr);
205         return mp->lcd_config.stallmode;
208 static int dss_check_settings_low(struct omap_overlay_manager *mgr,
209                 bool applying)
211         struct omap_overlay_info *oi;
212         struct omap_overlay_manager_info *mi;
213         struct omap_overlay *ovl;
214         struct omap_overlay_info *ois[MAX_DSS_OVERLAYS];
215         struct ovl_priv_data *op;
216         struct mgr_priv_data *mp;
218         mp = get_mgr_priv(mgr);
220         if (!mp->enabled)
221                 return 0;
223         if (applying && mp->user_info_dirty)
224                 mi = &mp->user_info;
225         else
226                 mi = &mp->info;
228         /* collect the infos to be tested into the array */
229         list_for_each_entry(ovl, &mgr->overlays, list) {
230                 op = get_ovl_priv(ovl);
232                 if (!op->enabled && !op->enabling)
233                         oi = NULL;
234                 else if (applying && op->user_info_dirty)
235                         oi = &op->user_info;
236                 else
237                         oi = &op->info;
239                 ois[ovl->id] = oi;
240         }
242         return dss_mgr_check(mgr, mi, &mp->timings, &mp->lcd_config, ois);
245 /*
246  * check manager and overlay settings using overlay_info from data->info
247  */
248 static int dss_check_settings(struct omap_overlay_manager *mgr)
250         return dss_check_settings_low(mgr, false);
253 /*
254  * check manager and overlay settings using overlay_info from ovl->info if
255  * dirty and from data->info otherwise
256  */
257 static int dss_check_settings_apply(struct omap_overlay_manager *mgr)
259         return dss_check_settings_low(mgr, true);
262 static bool need_isr(void)
264         const int num_mgrs = dss_feat_get_num_mgrs();
265         int i;
267         for (i = 0; i < num_mgrs; ++i) {
268                 struct omap_overlay_manager *mgr;
269                 struct mgr_priv_data *mp;
270                 struct omap_overlay *ovl;
272                 mgr = omap_dss_get_overlay_manager(i);
273                 mp = get_mgr_priv(mgr);
275                 if (!mp->enabled)
276                         continue;
278                 if (mgr_manual_update(mgr)) {
279                         /* to catch FRAMEDONE */
280                         if (mp->updating)
281                                 return true;
282                 } else {
283                         /* to catch GO bit going down */
284                         if (mp->busy)
285                                 return true;
287                         /* to write new values to registers */
288                         if (mp->info_dirty)
289                                 return true;
291                         /* to set GO bit */
292                         if (mp->shadow_info_dirty)
293                                 return true;
295                         /*
296                          * NOTE: we don't check extra_info flags for disabled
297                          * managers, once the manager is enabled, the extra_info
298                          * related manager changes will be taken in by HW.
299                          */
301                         /* to write new values to registers */
302                         if (mp->extra_info_dirty)
303                                 return true;
305                         /* to set GO bit */
306                         if (mp->shadow_extra_info_dirty)
307                                 return true;
309                         list_for_each_entry(ovl, &mgr->overlays, list) {
310                                 struct ovl_priv_data *op;
312                                 op = get_ovl_priv(ovl);
314                                 /*
315                                  * NOTE: we check extra_info flags even for
316                                  * disabled overlays, as extra_infos need to be
317                                  * always written.
318                                  */
320                                 /* to write new values to registers */
321                                 if (op->extra_info_dirty)
322                                         return true;
324                                 /* to set GO bit */
325                                 if (op->shadow_extra_info_dirty)
326                                         return true;
328                                 if (!op->enabled)
329                                         continue;
331                                 /* to write new values to registers */
332                                 if (op->info_dirty)
333                                         return true;
335                                 /* to set GO bit */
336                                 if (op->shadow_info_dirty)
337                                         return true;
338                         }
339                 }
340         }
342         return false;
345 static bool need_go(struct omap_overlay_manager *mgr)
347         struct omap_overlay *ovl;
348         struct mgr_priv_data *mp;
349         struct ovl_priv_data *op;
351         mp = get_mgr_priv(mgr);
353         if (mp->shadow_info_dirty || mp->shadow_extra_info_dirty)
354                 return true;
356         list_for_each_entry(ovl, &mgr->overlays, list) {
357                 op = get_ovl_priv(ovl);
358                 if (op->shadow_info_dirty || op->shadow_extra_info_dirty)
359                         return true;
360         }
362         return false;
365 /* returns true if an extra_info field is currently being updated */
366 static bool extra_info_update_ongoing(void)
368         const int num_mgrs = dss_feat_get_num_mgrs();
369         int i;
371         for (i = 0; i < num_mgrs; ++i) {
372                 struct omap_overlay_manager *mgr;
373                 struct omap_overlay *ovl;
374                 struct mgr_priv_data *mp;
376                 mgr = omap_dss_get_overlay_manager(i);
377                 mp = get_mgr_priv(mgr);
379                 if (!mp->enabled)
380                         continue;
382                 if (!mp->updating)
383                         continue;
385                 if (mp->extra_info_dirty || mp->shadow_extra_info_dirty)
386                         return true;
388                 list_for_each_entry(ovl, &mgr->overlays, list) {
389                         struct ovl_priv_data *op = get_ovl_priv(ovl);
391                         if (op->extra_info_dirty || op->shadow_extra_info_dirty)
392                                 return true;
393                 }
394         }
396         return false;
399 /* wait until no extra_info updates are pending */
400 static void wait_pending_extra_info_updates(void)
402         bool updating;
403         unsigned long flags;
404         unsigned long t;
405         int r;
407         spin_lock_irqsave(&data_lock, flags);
409         updating = extra_info_update_ongoing();
411         if (!updating) {
412                 spin_unlock_irqrestore(&data_lock, flags);
413                 return;
414         }
416         init_completion(&extra_updated_completion);
418         spin_unlock_irqrestore(&data_lock, flags);
420         t = msecs_to_jiffies(500);
421         r = wait_for_completion_timeout(&extra_updated_completion, t);
422         if (r == 0)
423                 DSSWARN("timeout in wait_pending_extra_info_updates\n");
426 static struct omap_dss_device *dss_mgr_get_device(struct omap_overlay_manager *mgr)
428         struct omap_dss_device *dssdev;
430         dssdev = mgr->output;
431         if (dssdev == NULL)
432                 return NULL;
434         while (dssdev->dst)
435                 dssdev = dssdev->dst;
437         if (dssdev->driver)
438                 return dssdev;
439         else
440                 return NULL;
443 static struct omap_dss_device *dss_ovl_get_device(struct omap_overlay *ovl)
445         return ovl->manager ? dss_mgr_get_device(ovl->manager) : NULL;
448 static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
450         unsigned long timeout = msecs_to_jiffies(500);
451         u32 irq;
452         int r;
454         if (mgr->output == NULL)
455                 return -ENODEV;
457         r = dispc_runtime_get();
458         if (r)
459                 return r;
461         switch (mgr->output->id) {
462         case OMAP_DSS_OUTPUT_VENC:
463                 irq = DISPC_IRQ_EVSYNC_ODD;
464                 break;
465         case OMAP_DSS_OUTPUT_HDMI:
466                 irq = DISPC_IRQ_EVSYNC_EVEN;
467                 break;
468         default:
469                 irq = dispc_mgr_get_vsync_irq(mgr->id);
470                 break;
471         }
473         r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
475         dispc_runtime_put();
477         return r;
480 static int dss_mgr_wait_for_go(struct omap_overlay_manager *mgr)
482         unsigned long timeout = msecs_to_jiffies(500);
483         struct mgr_priv_data *mp = get_mgr_priv(mgr);
484         u32 irq;
485         unsigned long flags;
486         int r;
487         int i;
489         spin_lock_irqsave(&data_lock, flags);
491         if (mgr_manual_update(mgr)) {
492                 spin_unlock_irqrestore(&data_lock, flags);
493                 return 0;
494         }
496         if (!mp->enabled) {
497                 spin_unlock_irqrestore(&data_lock, flags);
498                 return 0;
499         }
501         spin_unlock_irqrestore(&data_lock, flags);
503         r = dispc_runtime_get();
504         if (r)
505                 return r;
507         irq = dispc_mgr_get_vsync_irq(mgr->id);
509         i = 0;
510         while (1) {
511                 bool shadow_dirty, dirty;
513                 spin_lock_irqsave(&data_lock, flags);
514                 dirty = mp->info_dirty;
515                 shadow_dirty = mp->shadow_info_dirty;
516                 spin_unlock_irqrestore(&data_lock, flags);
518                 if (!dirty && !shadow_dirty) {
519                         r = 0;
520                         break;
521                 }
523                 /* 4 iterations is the worst case:
524                  * 1 - initial iteration, dirty = true (between VFP and VSYNC)
525                  * 2 - first VSYNC, dirty = true
526                  * 3 - dirty = false, shadow_dirty = true
527                  * 4 - shadow_dirty = false */
528                 if (i++ == 3) {
529                         DSSERR("mgr(%d)->wait_for_go() not finishing\n",
530                                         mgr->id);
531                         r = 0;
532                         break;
533                 }
535                 r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
536                 if (r == -ERESTARTSYS)
537                         break;
539                 if (r) {
540                         DSSERR("mgr(%d)->wait_for_go() timeout\n", mgr->id);
541                         break;
542                 }
543         }
545         dispc_runtime_put();
547         return r;
550 static int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl)
552         unsigned long timeout = msecs_to_jiffies(500);
553         struct ovl_priv_data *op;
554         struct mgr_priv_data *mp;
555         u32 irq;
556         unsigned long flags;
557         int r;
558         int i;
560         if (!ovl->manager)
561                 return 0;
563         mp = get_mgr_priv(ovl->manager);
565         spin_lock_irqsave(&data_lock, flags);
567         if (ovl_manual_update(ovl)) {
568                 spin_unlock_irqrestore(&data_lock, flags);
569                 return 0;
570         }
572         if (!mp->enabled) {
573                 spin_unlock_irqrestore(&data_lock, flags);
574                 return 0;
575         }
577         spin_unlock_irqrestore(&data_lock, flags);
579         r = dispc_runtime_get();
580         if (r)
581                 return r;
583         irq = dispc_mgr_get_vsync_irq(ovl->manager->id);
585         op = get_ovl_priv(ovl);
586         i = 0;
587         while (1) {
588                 bool shadow_dirty, dirty;
590                 spin_lock_irqsave(&data_lock, flags);
591                 dirty = op->info_dirty;
592                 shadow_dirty = op->shadow_info_dirty;
593                 spin_unlock_irqrestore(&data_lock, flags);
595                 if (!dirty && !shadow_dirty) {
596                         r = 0;
597                         break;
598                 }
600                 /* 4 iterations is the worst case:
601                  * 1 - initial iteration, dirty = true (between VFP and VSYNC)
602                  * 2 - first VSYNC, dirty = true
603                  * 3 - dirty = false, shadow_dirty = true
604                  * 4 - shadow_dirty = false */
605                 if (i++ == 3) {
606                         DSSERR("ovl(%d)->wait_for_go() not finishing\n",
607                                         ovl->id);
608                         r = 0;
609                         break;
610                 }
612                 r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
613                 if (r == -ERESTARTSYS)
614                         break;
616                 if (r) {
617                         DSSERR("ovl(%d)->wait_for_go() timeout\n", ovl->id);
618                         break;
619                 }
620         }
622         dispc_runtime_put();
624         return r;
627 static void dss_ovl_write_regs(struct omap_overlay *ovl)
629         struct ovl_priv_data *op = get_ovl_priv(ovl);
630         struct omap_overlay_info *oi;
631         bool replication;
632         struct mgr_priv_data *mp;
633         int r;
635         DSSDBG("writing ovl %d regs\n", ovl->id);
637         if (!op->enabled || !op->info_dirty)
638                 return;
640         oi = &op->info;
642         mp = get_mgr_priv(ovl->manager);
644         replication = dss_ovl_use_replication(mp->lcd_config, oi->color_mode);
646         r = dispc_ovl_setup(ovl->id, oi, replication, &mp->timings, false);
647         if (r) {
648                 /*
649                  * We can't do much here, as this function can be called from
650                  * vsync interrupt.
651                  */
652                 DSSERR("dispc_ovl_setup failed for ovl %d\n", ovl->id);
654                 /* This will leave fifo configurations in a nonoptimal state */
655                 op->enabled = false;
656                 dispc_ovl_enable(ovl->id, false);
657                 return;
658         }
660         op->info_dirty = false;
661         if (mp->updating)
662                 op->shadow_info_dirty = true;
665 static void dss_ovl_write_regs_extra(struct omap_overlay *ovl)
667         struct ovl_priv_data *op = get_ovl_priv(ovl);
668         struct mgr_priv_data *mp;
670         DSSDBG("writing ovl %d regs extra\n", ovl->id);
672         if (!op->extra_info_dirty)
673                 return;
675         /* note: write also when op->enabled == false, so that the ovl gets
676          * disabled */
678         dispc_ovl_enable(ovl->id, op->enabled);
679         dispc_ovl_set_fifo_threshold(ovl->id, op->fifo_low, op->fifo_high);
681         mp = get_mgr_priv(ovl->manager);
683         op->extra_info_dirty = false;
684         if (mp->updating)
685                 op->shadow_extra_info_dirty = true;
688 static void dss_mgr_write_regs(struct omap_overlay_manager *mgr)
690         struct mgr_priv_data *mp = get_mgr_priv(mgr);
691         struct omap_overlay *ovl;
693         DSSDBG("writing mgr %d regs\n", mgr->id);
695         if (!mp->enabled)
696                 return;
698         WARN_ON(mp->busy);
700         /* Commit overlay settings */
701         list_for_each_entry(ovl, &mgr->overlays, list) {
702                 dss_ovl_write_regs(ovl);
703                 dss_ovl_write_regs_extra(ovl);
704         }
706         if (mp->info_dirty) {
707                 dispc_mgr_setup(mgr->id, &mp->info);
709                 mp->info_dirty = false;
710                 if (mp->updating)
711                         mp->shadow_info_dirty = true;
712         }
715 static void dss_mgr_write_regs_extra(struct omap_overlay_manager *mgr)
717         struct mgr_priv_data *mp = get_mgr_priv(mgr);
719         DSSDBG("writing mgr %d regs extra\n", mgr->id);
721         if (!mp->extra_info_dirty)
722                 return;
724         dispc_mgr_set_timings(mgr->id, &mp->timings);
726         /* lcd_config parameters */
727         if (dss_mgr_is_lcd(mgr->id))
728                 dispc_mgr_set_lcd_config(mgr->id, &mp->lcd_config);
730         mp->extra_info_dirty = false;
731         if (mp->updating)
732                 mp->shadow_extra_info_dirty = true;
735 static void dss_write_regs(void)
737         const int num_mgrs = omap_dss_get_num_overlay_managers();
738         int i;
740         for (i = 0; i < num_mgrs; ++i) {
741                 struct omap_overlay_manager *mgr;
742                 struct mgr_priv_data *mp;
743                 int r;
745                 mgr = omap_dss_get_overlay_manager(i);
746                 mp = get_mgr_priv(mgr);
748                 if (!mp->enabled || mgr_manual_update(mgr) || mp->busy)
749                         continue;
751                 r = dss_check_settings(mgr);
752                 if (r) {
753                         DSSERR("cannot write registers for manager %s: "
754                                         "illegal configuration\n", mgr->name);
755                         continue;
756                 }
758                 dss_mgr_write_regs(mgr);
759                 dss_mgr_write_regs_extra(mgr);
760         }
763 static void dss_set_go_bits(void)
765         const int num_mgrs = omap_dss_get_num_overlay_managers();
766         int i;
768         for (i = 0; i < num_mgrs; ++i) {
769                 struct omap_overlay_manager *mgr;
770                 struct mgr_priv_data *mp;
772                 mgr = omap_dss_get_overlay_manager(i);
773                 mp = get_mgr_priv(mgr);
775                 if (!mp->enabled || mgr_manual_update(mgr) || mp->busy)
776                         continue;
778                 if (!need_go(mgr))
779                         continue;
781                 mp->busy = true;
783                 if (!dss_data.irq_enabled && need_isr())
784                         dss_register_vsync_isr();
786                 dispc_mgr_go(mgr->id);
787         }
791 static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr)
793         struct omap_overlay *ovl;
794         struct mgr_priv_data *mp;
795         struct ovl_priv_data *op;
797         mp = get_mgr_priv(mgr);
798         mp->shadow_info_dirty = false;
799         mp->shadow_extra_info_dirty = false;
801         list_for_each_entry(ovl, &mgr->overlays, list) {
802                 op = get_ovl_priv(ovl);
803                 op->shadow_info_dirty = false;
804                 op->shadow_extra_info_dirty = false;
805         }
808 static int dss_mgr_connect_compat(struct omap_overlay_manager *mgr,
809                 struct omap_dss_device *dst)
811         return mgr->set_output(mgr, dst);
814 static void dss_mgr_disconnect_compat(struct omap_overlay_manager *mgr,
815                 struct omap_dss_device *dst)
817         mgr->unset_output(mgr);
820 static void dss_mgr_start_update_compat(struct omap_overlay_manager *mgr)
822         struct mgr_priv_data *mp = get_mgr_priv(mgr);
823         unsigned long flags;
824         int r;
826         spin_lock_irqsave(&data_lock, flags);
828         WARN_ON(mp->updating);
830         r = dss_check_settings(mgr);
831         if (r) {
832                 DSSERR("cannot start manual update: illegal configuration\n");
833                 spin_unlock_irqrestore(&data_lock, flags);
834                 return;
835         }
837         dss_mgr_write_regs(mgr);
838         dss_mgr_write_regs_extra(mgr);
840         mp->updating = true;
842         if (!dss_data.irq_enabled && need_isr())
843                 dss_register_vsync_isr();
845         dispc_mgr_enable_sync(mgr->id);
847         spin_unlock_irqrestore(&data_lock, flags);
850 static void dss_apply_irq_handler(void *data, u32 mask);
852 static void dss_register_vsync_isr(void)
854         const int num_mgrs = dss_feat_get_num_mgrs();
855         u32 mask;
856         int r, i;
858         mask = 0;
859         for (i = 0; i < num_mgrs; ++i)
860                 mask |= dispc_mgr_get_vsync_irq(i);
862         for (i = 0; i < num_mgrs; ++i)
863                 mask |= dispc_mgr_get_framedone_irq(i);
865         r = omap_dispc_register_isr(dss_apply_irq_handler, NULL, mask);
866         WARN_ON(r);
868         dss_data.irq_enabled = true;
871 static void dss_unregister_vsync_isr(void)
873         const int num_mgrs = dss_feat_get_num_mgrs();
874         u32 mask;
875         int r, i;
877         mask = 0;
878         for (i = 0; i < num_mgrs; ++i)
879                 mask |= dispc_mgr_get_vsync_irq(i);
881         for (i = 0; i < num_mgrs; ++i)
882                 mask |= dispc_mgr_get_framedone_irq(i);
884         r = omap_dispc_unregister_isr(dss_apply_irq_handler, NULL, mask);
885         WARN_ON(r);
887         dss_data.irq_enabled = false;
890 static void dss_apply_irq_handler(void *data, u32 mask)
892         const int num_mgrs = dss_feat_get_num_mgrs();
893         int i;
894         bool extra_updating;
896         spin_lock(&data_lock);
898         /* clear busy, updating flags, shadow_dirty flags */
899         for (i = 0; i < num_mgrs; i++) {
900                 struct omap_overlay_manager *mgr;
901                 struct mgr_priv_data *mp;
903                 mgr = omap_dss_get_overlay_manager(i);
904                 mp = get_mgr_priv(mgr);
906                 if (!mp->enabled)
907                         continue;
909                 mp->updating = dispc_mgr_is_enabled(i);
911                 if (!mgr_manual_update(mgr)) {
912                         bool was_busy = mp->busy;
913                         mp->busy = dispc_mgr_go_busy(i);
915                         if (was_busy && !mp->busy)
916                                 mgr_clear_shadow_dirty(mgr);
917                 }
918         }
920         dss_write_regs();
921         dss_set_go_bits();
923         extra_updating = extra_info_update_ongoing();
924         if (!extra_updating)
925                 complete_all(&extra_updated_completion);
927         /* call framedone handlers for manual update displays */
928         for (i = 0; i < num_mgrs; i++) {
929                 struct omap_overlay_manager *mgr;
930                 struct mgr_priv_data *mp;
932                 mgr = omap_dss_get_overlay_manager(i);
933                 mp = get_mgr_priv(mgr);
935                 if (!mgr_manual_update(mgr) || !mp->framedone_handler)
936                         continue;
938                 if (mask & dispc_mgr_get_framedone_irq(i))
939                         mp->framedone_handler(mp->framedone_handler_data);
940         }
942         if (!need_isr())
943                 dss_unregister_vsync_isr();
945         spin_unlock(&data_lock);
948 static void omap_dss_mgr_apply_ovl(struct omap_overlay *ovl)
950         struct ovl_priv_data *op;
952         op = get_ovl_priv(ovl);
954         if (!op->user_info_dirty)
955                 return;
957         op->user_info_dirty = false;
958         op->info_dirty = true;
959         op->info = op->user_info;
962 static void omap_dss_mgr_apply_mgr(struct omap_overlay_manager *mgr)
964         struct mgr_priv_data *mp;
966         mp = get_mgr_priv(mgr);
968         if (!mp->user_info_dirty)
969                 return;
971         mp->user_info_dirty = false;
972         mp->info_dirty = true;
973         mp->info = mp->user_info;
976 static int omap_dss_mgr_apply(struct omap_overlay_manager *mgr)
978         unsigned long flags;
979         struct omap_overlay *ovl;
980         int r;
982         DSSDBG("omap_dss_mgr_apply(%s)\n", mgr->name);
984         spin_lock_irqsave(&data_lock, flags);
986         r = dss_check_settings_apply(mgr);
987         if (r) {
988                 spin_unlock_irqrestore(&data_lock, flags);
989                 DSSERR("failed to apply settings: illegal configuration.\n");
990                 return r;
991         }
993         /* Configure overlays */
994         list_for_each_entry(ovl, &mgr->overlays, list)
995                 omap_dss_mgr_apply_ovl(ovl);
997         /* Configure manager */
998         omap_dss_mgr_apply_mgr(mgr);
1000         dss_write_regs();
1001         dss_set_go_bits();
1003         spin_unlock_irqrestore(&data_lock, flags);
1005         return 0;
1008 static void dss_apply_ovl_enable(struct omap_overlay *ovl, bool enable)
1010         struct ovl_priv_data *op;
1012         op = get_ovl_priv(ovl);
1014         if (op->enabled == enable)
1015                 return;
1017         op->enabled = enable;
1018         op->extra_info_dirty = true;
1021 static void dss_apply_ovl_fifo_thresholds(struct omap_overlay *ovl,
1022                 u32 fifo_low, u32 fifo_high)
1024         struct ovl_priv_data *op = get_ovl_priv(ovl);
1026         if (op->fifo_low == fifo_low && op->fifo_high == fifo_high)
1027                 return;
1029         op->fifo_low = fifo_low;
1030         op->fifo_high = fifo_high;
1031         op->extra_info_dirty = true;
1034 static void dss_ovl_setup_fifo(struct omap_overlay *ovl)
1036         struct ovl_priv_data *op = get_ovl_priv(ovl);
1037         u32 fifo_low, fifo_high;
1038         bool use_fifo_merge = false;
1040         if (!op->enabled && !op->enabling)
1041                 return;
1043         dispc_ovl_compute_fifo_thresholds(ovl->id, &fifo_low, &fifo_high,
1044                         use_fifo_merge, ovl_manual_update(ovl));
1046         dss_apply_ovl_fifo_thresholds(ovl, fifo_low, fifo_high);
1049 static void dss_mgr_setup_fifos(struct omap_overlay_manager *mgr)
1051         struct omap_overlay *ovl;
1052         struct mgr_priv_data *mp;
1054         mp = get_mgr_priv(mgr);
1056         if (!mp->enabled)
1057                 return;
1059         list_for_each_entry(ovl, &mgr->overlays, list)
1060                 dss_ovl_setup_fifo(ovl);
1063 static void dss_setup_fifos(void)
1065         const int num_mgrs = omap_dss_get_num_overlay_managers();
1066         struct omap_overlay_manager *mgr;
1067         int i;
1069         for (i = 0; i < num_mgrs; ++i) {
1070                 mgr = omap_dss_get_overlay_manager(i);
1071                 dss_mgr_setup_fifos(mgr);
1072         }
1075 static int dss_mgr_enable_compat(struct omap_overlay_manager *mgr)
1077         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1078         unsigned long flags;
1079         int r;
1081         mutex_lock(&apply_lock);
1083         if (mp->enabled)
1084                 goto out;
1086         spin_lock_irqsave(&data_lock, flags);
1088         mp->enabled = true;
1090         r = dss_check_settings(mgr);
1091         if (r) {
1092                 DSSERR("failed to enable manager %d: check_settings failed\n",
1093                                 mgr->id);
1094                 goto err;
1095         }
1097         dss_setup_fifos();
1099         dss_write_regs();
1100         dss_set_go_bits();
1102         if (!mgr_manual_update(mgr))
1103                 mp->updating = true;
1105         if (!dss_data.irq_enabled && need_isr())
1106                 dss_register_vsync_isr();
1108         spin_unlock_irqrestore(&data_lock, flags);
1110         if (!mgr_manual_update(mgr))
1111                 dispc_mgr_enable_sync(mgr->id);
1113 out:
1114         mutex_unlock(&apply_lock);
1116         return 0;
1118 err:
1119         mp->enabled = false;
1120         spin_unlock_irqrestore(&data_lock, flags);
1121         mutex_unlock(&apply_lock);
1122         return r;
1125 static void dss_mgr_disable_compat(struct omap_overlay_manager *mgr)
1127         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1128         unsigned long flags;
1130         mutex_lock(&apply_lock);
1132         if (!mp->enabled)
1133                 goto out;
1135         if (!mgr_manual_update(mgr))
1136                 dispc_mgr_disable_sync(mgr->id);
1138         spin_lock_irqsave(&data_lock, flags);
1140         mp->updating = false;
1141         mp->enabled = false;
1143         spin_unlock_irqrestore(&data_lock, flags);
1145 out:
1146         mutex_unlock(&apply_lock);
1149 static int dss_mgr_set_info(struct omap_overlay_manager *mgr,
1150                 struct omap_overlay_manager_info *info)
1152         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1153         unsigned long flags;
1154         int r;
1156         r = dss_mgr_simple_check(mgr, info);
1157         if (r)
1158                 return r;
1160         spin_lock_irqsave(&data_lock, flags);
1162         mp->user_info = *info;
1163         mp->user_info_dirty = true;
1165         spin_unlock_irqrestore(&data_lock, flags);
1167         return 0;
1170 static void dss_mgr_get_info(struct omap_overlay_manager *mgr,
1171                 struct omap_overlay_manager_info *info)
1173         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1174         unsigned long flags;
1176         spin_lock_irqsave(&data_lock, flags);
1178         *info = mp->user_info;
1180         spin_unlock_irqrestore(&data_lock, flags);
1183 static int dss_mgr_set_output(struct omap_overlay_manager *mgr,
1184                 struct omap_dss_device *output)
1186         int r;
1188         mutex_lock(&apply_lock);
1190         if (mgr->output) {
1191                 DSSERR("manager %s is already connected to an output\n",
1192                         mgr->name);
1193                 r = -EINVAL;
1194                 goto err;
1195         }
1197         if ((mgr->supported_outputs & output->id) == 0) {
1198                 DSSERR("output does not support manager %s\n",
1199                         mgr->name);
1200                 r = -EINVAL;
1201                 goto err;
1202         }
1204         output->manager = mgr;
1205         mgr->output = output;
1207         mutex_unlock(&apply_lock);
1209         return 0;
1210 err:
1211         mutex_unlock(&apply_lock);
1212         return r;
1215 static int dss_mgr_unset_output(struct omap_overlay_manager *mgr)
1217         int r;
1218         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1219         unsigned long flags;
1221         mutex_lock(&apply_lock);
1223         if (!mgr->output) {
1224                 DSSERR("failed to unset output, output not set\n");
1225                 r = -EINVAL;
1226                 goto err;
1227         }
1229         spin_lock_irqsave(&data_lock, flags);
1231         if (mp->enabled) {
1232                 DSSERR("output can't be unset when manager is enabled\n");
1233                 r = -EINVAL;
1234                 goto err1;
1235         }
1237         spin_unlock_irqrestore(&data_lock, flags);
1239         mgr->output->manager = NULL;
1240         mgr->output = NULL;
1242         mutex_unlock(&apply_lock);
1244         return 0;
1245 err1:
1246         spin_unlock_irqrestore(&data_lock, flags);
1247 err:
1248         mutex_unlock(&apply_lock);
1250         return r;
1253 static void dss_apply_mgr_timings(struct omap_overlay_manager *mgr,
1254                 const struct omap_video_timings *timings)
1256         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1258         mp->timings = *timings;
1259         mp->extra_info_dirty = true;
1262 static void dss_mgr_set_timings_compat(struct omap_overlay_manager *mgr,
1263                 const struct omap_video_timings *timings)
1265         unsigned long flags;
1266         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1268         spin_lock_irqsave(&data_lock, flags);
1270         if (mp->updating) {
1271                 DSSERR("cannot set timings for %s: manager needs to be disabled\n",
1272                         mgr->name);
1273                 goto out;
1274         }
1276         dss_apply_mgr_timings(mgr, timings);
1277 out:
1278         spin_unlock_irqrestore(&data_lock, flags);
1281 static void dss_apply_mgr_lcd_config(struct omap_overlay_manager *mgr,
1282                 const struct dss_lcd_mgr_config *config)
1284         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1286         mp->lcd_config = *config;
1287         mp->extra_info_dirty = true;
1290 static void dss_mgr_set_lcd_config_compat(struct omap_overlay_manager *mgr,
1291                 const struct dss_lcd_mgr_config *config)
1293         unsigned long flags;
1294         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1296         spin_lock_irqsave(&data_lock, flags);
1298         if (mp->enabled) {
1299                 DSSERR("cannot apply lcd config for %s: manager needs to be disabled\n",
1300                         mgr->name);
1301                 goto out;
1302         }
1304         dss_apply_mgr_lcd_config(mgr, config);
1305 out:
1306         spin_unlock_irqrestore(&data_lock, flags);
1309 static int dss_ovl_set_info(struct omap_overlay *ovl,
1310                 struct omap_overlay_info *info)
1312         struct ovl_priv_data *op = get_ovl_priv(ovl);
1313         unsigned long flags;
1314         int r;
1316         r = dss_ovl_simple_check(ovl, info);
1317         if (r)
1318                 return r;
1320         spin_lock_irqsave(&data_lock, flags);
1322         op->user_info = *info;
1323         op->user_info_dirty = true;
1325         spin_unlock_irqrestore(&data_lock, flags);
1327         return 0;
1330 static void dss_ovl_get_info(struct omap_overlay *ovl,
1331                 struct omap_overlay_info *info)
1333         struct ovl_priv_data *op = get_ovl_priv(ovl);
1334         unsigned long flags;
1336         spin_lock_irqsave(&data_lock, flags);
1338         *info = op->user_info;
1340         spin_unlock_irqrestore(&data_lock, flags);
1343 static int dss_ovl_set_manager(struct omap_overlay *ovl,
1344                 struct omap_overlay_manager *mgr)
1346         struct ovl_priv_data *op = get_ovl_priv(ovl);
1347         unsigned long flags;
1348         int r;
1350         if (!mgr)
1351                 return -EINVAL;
1353         mutex_lock(&apply_lock);
1355         if (ovl->manager) {
1356                 DSSERR("overlay '%s' already has a manager '%s'\n",
1357                                 ovl->name, ovl->manager->name);
1358                 r = -EINVAL;
1359                 goto err;
1360         }
1362         r = dispc_runtime_get();
1363         if (r)
1364                 goto err;
1366         spin_lock_irqsave(&data_lock, flags);
1368         if (op->enabled) {
1369                 spin_unlock_irqrestore(&data_lock, flags);
1370                 DSSERR("overlay has to be disabled to change the manager\n");
1371                 r = -EINVAL;
1372                 goto err1;
1373         }
1375         dispc_ovl_set_channel_out(ovl->id, mgr->id);
1377         ovl->manager = mgr;
1378         list_add_tail(&ovl->list, &mgr->overlays);
1380         spin_unlock_irqrestore(&data_lock, flags);
1382         dispc_runtime_put();
1384         mutex_unlock(&apply_lock);
1386         return 0;
1388 err1:
1389         dispc_runtime_put();
1390 err:
1391         mutex_unlock(&apply_lock);
1392         return r;
1395 static int dss_ovl_unset_manager(struct omap_overlay *ovl)
1397         struct ovl_priv_data *op = get_ovl_priv(ovl);
1398         unsigned long flags;
1399         int r;
1401         mutex_lock(&apply_lock);
1403         if (!ovl->manager) {
1404                 DSSERR("failed to detach overlay: manager not set\n");
1405                 r = -EINVAL;
1406                 goto err;
1407         }
1409         spin_lock_irqsave(&data_lock, flags);
1411         if (op->enabled) {
1412                 spin_unlock_irqrestore(&data_lock, flags);
1413                 DSSERR("overlay has to be disabled to unset the manager\n");
1414                 r = -EINVAL;
1415                 goto err;
1416         }
1418         spin_unlock_irqrestore(&data_lock, flags);
1420         /* wait for pending extra_info updates to ensure the ovl is disabled */
1421         wait_pending_extra_info_updates();
1423         /*
1424          * For a manual update display, there is no guarantee that the overlay
1425          * is really disabled in HW, we may need an extra update from this
1426          * manager before the configurations can go in. Return an error if the
1427          * overlay needed an update from the manager.
1428          *
1429          * TODO: Instead of returning an error, try to do a dummy manager update
1430          * here to disable the overlay in hardware. Use the *GATED fields in
1431          * the DISPC_CONFIG registers to do a dummy update.
1432          */
1433         spin_lock_irqsave(&data_lock, flags);
1435         if (ovl_manual_update(ovl) && op->extra_info_dirty) {
1436                 spin_unlock_irqrestore(&data_lock, flags);
1437                 DSSERR("need an update to change the manager\n");
1438                 r = -EINVAL;
1439                 goto err;
1440         }
1442         ovl->manager = NULL;
1443         list_del(&ovl->list);
1445         spin_unlock_irqrestore(&data_lock, flags);
1447         mutex_unlock(&apply_lock);
1449         return 0;
1450 err:
1451         mutex_unlock(&apply_lock);
1452         return r;
1455 static bool dss_ovl_is_enabled(struct omap_overlay *ovl)
1457         struct ovl_priv_data *op = get_ovl_priv(ovl);
1458         unsigned long flags;
1459         bool e;
1461         spin_lock_irqsave(&data_lock, flags);
1463         e = op->enabled;
1465         spin_unlock_irqrestore(&data_lock, flags);
1467         return e;
1470 static int dss_ovl_enable(struct omap_overlay *ovl)
1472         struct ovl_priv_data *op = get_ovl_priv(ovl);
1473         unsigned long flags;
1474         int r;
1476         mutex_lock(&apply_lock);
1478         if (op->enabled) {
1479                 r = 0;
1480                 goto err1;
1481         }
1483         if (ovl->manager == NULL || ovl->manager->output == NULL) {
1484                 r = -EINVAL;
1485                 goto err1;
1486         }
1488         spin_lock_irqsave(&data_lock, flags);
1490         op->enabling = true;
1492         r = dss_check_settings(ovl->manager);
1493         if (r) {
1494                 DSSERR("failed to enable overlay %d: check_settings failed\n",
1495                                 ovl->id);
1496                 goto err2;
1497         }
1499         dss_setup_fifos();
1501         op->enabling = false;
1502         dss_apply_ovl_enable(ovl, true);
1504         dss_write_regs();
1505         dss_set_go_bits();
1507         spin_unlock_irqrestore(&data_lock, flags);
1509         mutex_unlock(&apply_lock);
1511         return 0;
1512 err2:
1513         op->enabling = false;
1514         spin_unlock_irqrestore(&data_lock, flags);
1515 err1:
1516         mutex_unlock(&apply_lock);
1517         return r;
1520 static int dss_ovl_disable(struct omap_overlay *ovl)
1522         struct ovl_priv_data *op = get_ovl_priv(ovl);
1523         unsigned long flags;
1524         int r;
1526         mutex_lock(&apply_lock);
1528         if (!op->enabled) {
1529                 r = 0;
1530                 goto err;
1531         }
1533         if (ovl->manager == NULL || ovl->manager->output == NULL) {
1534                 r = -EINVAL;
1535                 goto err;
1536         }
1538         spin_lock_irqsave(&data_lock, flags);
1540         dss_apply_ovl_enable(ovl, false);
1541         dss_write_regs();
1542         dss_set_go_bits();
1544         spin_unlock_irqrestore(&data_lock, flags);
1546         mutex_unlock(&apply_lock);
1548         return 0;
1550 err:
1551         mutex_unlock(&apply_lock);
1552         return r;
1555 static int dss_mgr_register_framedone_handler_compat(struct omap_overlay_manager *mgr,
1556                 void (*handler)(void *), void *data)
1558         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1560         if (mp->framedone_handler)
1561                 return -EBUSY;
1563         mp->framedone_handler = handler;
1564         mp->framedone_handler_data = data;
1566         return 0;
1569 static void dss_mgr_unregister_framedone_handler_compat(struct omap_overlay_manager *mgr,
1570                 void (*handler)(void *), void *data)
1572         struct mgr_priv_data *mp = get_mgr_priv(mgr);
1574         WARN_ON(mp->framedone_handler != handler ||
1575                         mp->framedone_handler_data != data);
1577         mp->framedone_handler = NULL;
1578         mp->framedone_handler_data = NULL;
1581 static const struct dss_mgr_ops apply_mgr_ops = {
1582         .connect = dss_mgr_connect_compat,
1583         .disconnect = dss_mgr_disconnect_compat,
1584         .start_update = dss_mgr_start_update_compat,
1585         .enable = dss_mgr_enable_compat,
1586         .disable = dss_mgr_disable_compat,
1587         .set_timings = dss_mgr_set_timings_compat,
1588         .set_lcd_config = dss_mgr_set_lcd_config_compat,
1589         .register_framedone_handler = dss_mgr_register_framedone_handler_compat,
1590         .unregister_framedone_handler = dss_mgr_unregister_framedone_handler_compat,
1591 };
1593 static int compat_refcnt;
1594 static DEFINE_MUTEX(compat_init_lock);
1596 int omapdss_compat_init(void)
1598         struct platform_device *pdev = dss_get_core_pdev();
1599         int i, r;
1601         mutex_lock(&compat_init_lock);
1603         if (compat_refcnt++ > 0)
1604                 goto out;
1606         apply_init_priv();
1608         dss_init_overlay_managers_sysfs(pdev);
1609         dss_init_overlays(pdev);
1611         for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
1612                 struct omap_overlay_manager *mgr;
1614                 mgr = omap_dss_get_overlay_manager(i);
1616                 mgr->set_output = &dss_mgr_set_output;
1617                 mgr->unset_output = &dss_mgr_unset_output;
1618                 mgr->apply = &omap_dss_mgr_apply;
1619                 mgr->set_manager_info = &dss_mgr_set_info;
1620                 mgr->get_manager_info = &dss_mgr_get_info;
1621                 mgr->wait_for_go = &dss_mgr_wait_for_go;
1622                 mgr->wait_for_vsync = &dss_mgr_wait_for_vsync;
1623                 mgr->get_device = &dss_mgr_get_device;
1624         }
1626         for (i = 0; i < omap_dss_get_num_overlays(); i++) {
1627                 struct omap_overlay *ovl = omap_dss_get_overlay(i);
1629                 ovl->is_enabled = &dss_ovl_is_enabled;
1630                 ovl->enable = &dss_ovl_enable;
1631                 ovl->disable = &dss_ovl_disable;
1632                 ovl->set_manager = &dss_ovl_set_manager;
1633                 ovl->unset_manager = &dss_ovl_unset_manager;
1634                 ovl->set_overlay_info = &dss_ovl_set_info;
1635                 ovl->get_overlay_info = &dss_ovl_get_info;
1636                 ovl->wait_for_go = &dss_mgr_wait_for_go_ovl;
1637                 ovl->get_device = &dss_ovl_get_device;
1638         }
1640         r = dss_install_mgr_ops(&apply_mgr_ops);
1641         if (r)
1642                 goto err_mgr_ops;
1644         r = display_init_sysfs(pdev);
1645         if (r)
1646                 goto err_disp_sysfs;
1648         dispc_runtime_get();
1650         r = dss_dispc_initialize_irq();
1651         if (r)
1652                 goto err_init_irq;
1654         dispc_runtime_put();
1656 out:
1657         mutex_unlock(&compat_init_lock);
1659         return 0;
1661 err_init_irq:
1662         dispc_runtime_put();
1663         display_uninit_sysfs(pdev);
1665 err_disp_sysfs:
1666         dss_uninstall_mgr_ops();
1668 err_mgr_ops:
1669         dss_uninit_overlay_managers_sysfs(pdev);
1670         dss_uninit_overlays(pdev);
1672         compat_refcnt--;
1674         mutex_unlock(&compat_init_lock);
1676         return r;
1678 EXPORT_SYMBOL(omapdss_compat_init);
1680 void omapdss_compat_uninit(void)
1682         struct platform_device *pdev = dss_get_core_pdev();
1684         mutex_lock(&compat_init_lock);
1686         if (--compat_refcnt > 0)
1687                 goto out;
1689         dss_dispc_uninitialize_irq();
1691         display_uninit_sysfs(pdev);
1693         dss_uninstall_mgr_ops();
1695         dss_uninit_overlay_managers_sysfs(pdev);
1696         dss_uninit_overlays(pdev);
1697 out:
1698         mutex_unlock(&compat_init_lock);
1700 EXPORT_SYMBOL(omapdss_compat_uninit);