tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/jiffies.h>
30
31#include <video/omapdss.h>
32
33#include "dss.h"
34#include "dss_features.h"
35
36static int num_managers;
37static struct omap_overlay_manager *managers;
38
39static ssize_t manager_name_show(struct omap_overlay_manager *mgr, char *buf)
40{
41 return snprintf(buf, PAGE_SIZE, "%s\n", mgr->name);
42}
43
44static ssize_t manager_display_show(struct omap_overlay_manager *mgr, char *buf)
45{
46 return snprintf(buf, PAGE_SIZE, "%s\n",
47 mgr->device ? mgr->device->name : "<none>");
48}
49
50static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
51 const char *buf, size_t size)
52{
53 int r = 0;
54 size_t len = size;
55 struct omap_dss_device *dssdev = NULL;
56
57 int match(struct omap_dss_device *dssdev, void *data)
58 {
59 const char *str = data;
60 return sysfs_streq(dssdev->name, str);
61 }
62
63 if (buf[size-1] == '\n')
64 --len;
65
66 if (len > 0)
67 dssdev = omap_dss_find_device((void *)buf, match);
68
69 if (len > 0 && dssdev == NULL)
70 return -EINVAL;
71
72 if (dssdev)
73 DSSDBG("display %s found\n", dssdev->name);
74
75 if (mgr->device) {
76 r = mgr->unset_device(mgr);
77 if (r) {
78 DSSERR("failed to unset display\n");
79 goto put_device;
80 }
81 }
82
83 if (dssdev) {
84 r = mgr->set_device(mgr, dssdev);
85 if (r) {
86 DSSERR("failed to set manager\n");
87 goto put_device;
88 }
89
90 r = mgr->apply(mgr);
91 if (r) {
92 DSSERR("failed to apply dispc config\n");
93 goto put_device;
94 }
95 }
96
97put_device:
98 if (dssdev)
99 omap_dss_put_device(dssdev);
100
101 return r ? r : size;
102}
103
104static ssize_t manager_default_color_show(struct omap_overlay_manager *mgr,
105 char *buf)
106{
107 struct omap_overlay_manager_info info;
108
109 mgr->get_manager_info(mgr, &info);
110
111 return snprintf(buf, PAGE_SIZE, "%#x\n", info.default_color);
112}
113
114static ssize_t manager_default_color_store(struct omap_overlay_manager *mgr,
115 const char *buf, size_t size)
116{
117 struct omap_overlay_manager_info info;
118 u32 color;
119 int r;
120
121 r = kstrtouint(buf, 0, &color);
122 if (r)
123 return r;
124
125 mgr->get_manager_info(mgr, &info);
126
127 info.default_color = color;
128
129 r = mgr->set_manager_info(mgr, &info);
130 if (r)
131 return r;
132
133 r = mgr->apply(mgr);
134 if (r)
135 return r;
136
137 return size;
138}
139
140static const char *trans_key_type_str[] = {
141 "gfx-destination",
142 "video-source",
143};
144
145static ssize_t manager_trans_key_type_show(struct omap_overlay_manager *mgr,
146 char *buf)
147{
148 enum omap_dss_trans_key_type key_type;
149 struct omap_overlay_manager_info info;
150
151 mgr->get_manager_info(mgr, &info);
152
153 key_type = info.trans_key_type;
154 BUG_ON(key_type >= ARRAY_SIZE(trans_key_type_str));
155
156 return snprintf(buf, PAGE_SIZE, "%s\n", trans_key_type_str[key_type]);
157}
158
159static ssize_t manager_trans_key_type_store(struct omap_overlay_manager *mgr,
160 const char *buf, size_t size)
161{
162 enum omap_dss_trans_key_type key_type;
163 struct omap_overlay_manager_info info;
164 int r;
165
166 for (key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
167 key_type < ARRAY_SIZE(trans_key_type_str); key_type++) {
168 if (sysfs_streq(buf, trans_key_type_str[key_type]))
169 break;
170 }
171
172 if (key_type == ARRAY_SIZE(trans_key_type_str))
173 return -EINVAL;
174
175 mgr->get_manager_info(mgr, &info);
176
177 info.trans_key_type = key_type;
178
179 r = mgr->set_manager_info(mgr, &info);
180 if (r)
181 return r;
182
183 r = mgr->apply(mgr);
184 if (r)
185 return r;
186
187 return size;
188}
189
190static ssize_t manager_trans_key_value_show(struct omap_overlay_manager *mgr,
191 char *buf)
192{
193 struct omap_overlay_manager_info info;
194
195 mgr->get_manager_info(mgr, &info);
196
197 return snprintf(buf, PAGE_SIZE, "%#x\n", info.trans_key);
198}
199
200static ssize_t manager_trans_key_value_store(struct omap_overlay_manager *mgr,
201 const char *buf, size_t size)
202{
203 struct omap_overlay_manager_info info;
204 u32 key_value;
205 int r;
206
207 r = kstrtouint(buf, 0, &key_value);
208 if (r)
209 return r;
210
211 mgr->get_manager_info(mgr, &info);
212
213 info.trans_key = key_value;
214
215 r = mgr->set_manager_info(mgr, &info);
216 if (r)
217 return r;
218
219 r = mgr->apply(mgr);
220 if (r)
221 return r;
222
223 return size;
224}
225
226static ssize_t manager_trans_key_enabled_show(struct omap_overlay_manager *mgr,
227 char *buf)
228{
229 struct omap_overlay_manager_info info;
230
231 mgr->get_manager_info(mgr, &info);
232
233 return snprintf(buf, PAGE_SIZE, "%d\n", info.trans_enabled);
234}
235
236static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
237 const char *buf, size_t size)
238{
239 struct omap_overlay_manager_info info;
240 bool enable;
241 int r;
242
243 r = strtobool(buf, &enable);
244 if (r)
245 return r;
246
247 mgr->get_manager_info(mgr, &info);
248
249 info.trans_enabled = enable;
250
251 r = mgr->set_manager_info(mgr, &info);
252 if (r)
253 return r;
254
255 r = mgr->apply(mgr);
256 if (r)
257 return r;
258
259 return size;
260}
261
262static ssize_t manager_alpha_blending_enabled_show(
263 struct omap_overlay_manager *mgr, char *buf)
264{
265 struct omap_overlay_manager_info info;
266
267 mgr->get_manager_info(mgr, &info);
268
269 WARN_ON(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER));
270
271 return snprintf(buf, PAGE_SIZE, "%d\n",
272 info.partial_alpha_enabled);
273}
274
275static ssize_t manager_alpha_blending_enabled_store(
276 struct omap_overlay_manager *mgr,
277 const char *buf, size_t size)
278{
279 struct omap_overlay_manager_info info;
280 bool enable;
281 int r;
282
283 WARN_ON(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER));
284
285 r = strtobool(buf, &enable);
286 if (r)
287 return r;
288
289 mgr->get_manager_info(mgr, &info);
290
291 info.partial_alpha_enabled = enable;
292
293 r = mgr->set_manager_info(mgr, &info);
294 if (r)
295 return r;
296
297 r = mgr->apply(mgr);
298 if (r)
299 return r;
300
301 return size;
302}
303
304static ssize_t manager_cpr_enable_show(struct omap_overlay_manager *mgr,
305 char *buf)
306{
307 struct omap_overlay_manager_info info;
308
309 mgr->get_manager_info(mgr, &info);
310
311 return snprintf(buf, PAGE_SIZE, "%d\n", info.cpr_enable);
312}
313
314static ssize_t manager_cpr_enable_store(struct omap_overlay_manager *mgr,
315 const char *buf, size_t size)
316{
317 struct omap_overlay_manager_info info;
318 int r;
319 bool enable;
320
321 if (!dss_has_feature(FEAT_CPR))
322 return -ENODEV;
323
324 r = strtobool(buf, &enable);
325 if (r)
326 return r;
327
328 mgr->get_manager_info(mgr, &info);
329
330 if (info.cpr_enable == enable)
331 return size;
332
333 info.cpr_enable = enable;
334
335 r = mgr->set_manager_info(mgr, &info);
336 if (r)
337 return r;
338
339 r = mgr->apply(mgr);
340 if (r)
341 return r;
342
343 return size;
344}
345
346static ssize_t manager_cpr_coef_show(struct omap_overlay_manager *mgr,
347 char *buf)
348{
349 struct omap_overlay_manager_info info;
350
351 mgr->get_manager_info(mgr, &info);
352
353 return snprintf(buf, PAGE_SIZE,
354 "%d %d %d %d %d %d %d %d %d\n",
355 info.cpr_coefs.rr,
356 info.cpr_coefs.rg,
357 info.cpr_coefs.rb,
358 info.cpr_coefs.gr,
359 info.cpr_coefs.gg,
360 info.cpr_coefs.gb,
361 info.cpr_coefs.br,
362 info.cpr_coefs.bg,
363 info.cpr_coefs.bb);
364}
365
366static ssize_t manager_cpr_coef_store(struct omap_overlay_manager *mgr,
367 const char *buf, size_t size)
368{
369 struct omap_overlay_manager_info info;
370 struct omap_dss_cpr_coefs coefs;
371 int r, i;
372 s16 *arr;
373
374 if (!dss_has_feature(FEAT_CPR))
375 return -ENODEV;
376
377 if (sscanf(buf, "%hd %hd %hd %hd %hd %hd %hd %hd %hd",
378 &coefs.rr, &coefs.rg, &coefs.rb,
379 &coefs.gr, &coefs.gg, &coefs.gb,
380 &coefs.br, &coefs.bg, &coefs.bb) != 9)
381 return -EINVAL;
382
383 arr = (s16[]){ coefs.rr, coefs.rg, coefs.rb,
384 coefs.gr, coefs.gg, coefs.gb,
385 coefs.br, coefs.bg, coefs.bb };
386
387 for (i = 0; i < 9; ++i) {
388 if (arr[i] < -512 || arr[i] > 511)
389 return -EINVAL;
390 }
391
392 mgr->get_manager_info(mgr, &info);
393
394 info.cpr_coefs = coefs;
395
396 r = mgr->set_manager_info(mgr, &info);
397 if (r)
398 return r;
399
400 r = mgr->apply(mgr);
401 if (r)
402 return r;
403
404 return size;
405}
406
407struct manager_attribute {
408 struct attribute attr;
409 ssize_t (*show)(struct omap_overlay_manager *, char *);
410 ssize_t (*store)(struct omap_overlay_manager *, const char *, size_t);
411};
412
413#define MANAGER_ATTR(_name, _mode, _show, _store) \
414 struct manager_attribute manager_attr_##_name = \
415 __ATTR(_name, _mode, _show, _store)
416
417static MANAGER_ATTR(name, S_IRUGO, manager_name_show, NULL);
418static MANAGER_ATTR(display, S_IRUGO|S_IWUSR,
419 manager_display_show, manager_display_store);
420static MANAGER_ATTR(default_color, S_IRUGO|S_IWUSR,
421 manager_default_color_show, manager_default_color_store);
422static MANAGER_ATTR(trans_key_type, S_IRUGO|S_IWUSR,
423 manager_trans_key_type_show, manager_trans_key_type_store);
424static MANAGER_ATTR(trans_key_value, S_IRUGO|S_IWUSR,
425 manager_trans_key_value_show, manager_trans_key_value_store);
426static MANAGER_ATTR(trans_key_enabled, S_IRUGO|S_IWUSR,
427 manager_trans_key_enabled_show,
428 manager_trans_key_enabled_store);
429static MANAGER_ATTR(alpha_blending_enabled, S_IRUGO|S_IWUSR,
430 manager_alpha_blending_enabled_show,
431 manager_alpha_blending_enabled_store);
432static MANAGER_ATTR(cpr_enable, S_IRUGO|S_IWUSR,
433 manager_cpr_enable_show,
434 manager_cpr_enable_store);
435static MANAGER_ATTR(cpr_coef, S_IRUGO|S_IWUSR,
436 manager_cpr_coef_show,
437 manager_cpr_coef_store);
438
439
440static struct attribute *manager_sysfs_attrs[] = {
441 &manager_attr_name.attr,
442 &manager_attr_display.attr,
443 &manager_attr_default_color.attr,
444 &manager_attr_trans_key_type.attr,
445 &manager_attr_trans_key_value.attr,
446 &manager_attr_trans_key_enabled.attr,
447 &manager_attr_alpha_blending_enabled.attr,
448 &manager_attr_cpr_enable.attr,
449 &manager_attr_cpr_coef.attr,
450 NULL
451};
452
453static ssize_t manager_attr_show(struct kobject *kobj, struct attribute *attr,
454 char *buf)
455{
456 struct omap_overlay_manager *manager;
457 struct manager_attribute *manager_attr;
458
459 manager = container_of(kobj, struct omap_overlay_manager, kobj);
460 manager_attr = container_of(attr, struct manager_attribute, attr);
461
462 if (!manager_attr->show)
463 return -ENOENT;
464
465 return manager_attr->show(manager, buf);
466}
467
468static ssize_t manager_attr_store(struct kobject *kobj, struct attribute *attr,
469 const char *buf, size_t size)
470{
471 struct omap_overlay_manager *manager;
472 struct manager_attribute *manager_attr;
473
474 manager = container_of(kobj, struct omap_overlay_manager, kobj);
475 manager_attr = container_of(attr, struct manager_attribute, attr);
476
477 if (!manager_attr->store)
478 return -ENOENT;
479
480 return manager_attr->store(manager, buf, size);
481}
482
483static const struct sysfs_ops manager_sysfs_ops = {
484 .show = manager_attr_show,
485 .store = manager_attr_store,
486};
487
488static struct kobj_type manager_ktype = {
489 .sysfs_ops = &manager_sysfs_ops,
490 .default_attrs = manager_sysfs_attrs,
491};
492
493static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
494{
495 unsigned long timeout = msecs_to_jiffies(500);
496 u32 irq;
497
498 if (mgr->device->type == OMAP_DISPLAY_TYPE_VENC) {
499 irq = DISPC_IRQ_EVSYNC_ODD;
500 } else if (mgr->device->type == OMAP_DISPLAY_TYPE_HDMI) {
501 irq = DISPC_IRQ_EVSYNC_EVEN;
502 } else {
503 if (mgr->id == OMAP_DSS_CHANNEL_LCD)
504 irq = DISPC_IRQ_VSYNC;
505 else
506 irq = DISPC_IRQ_VSYNC2;
507 }
508 return omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
509}
510
511int dss_init_overlay_managers(struct platform_device *pdev)
512{
513 int i, r;
514
515 num_managers = dss_feat_get_num_mgrs();
516
517 managers = kzalloc(sizeof(struct omap_overlay_manager) * num_managers,
518 GFP_KERNEL);
519
520 BUG_ON(managers == NULL);
521
522 for (i = 0; i < num_managers; ++i) {
523 struct omap_overlay_manager *mgr = &managers[i];
524
525 switch (i) {
526 case 0:
527 mgr->name = "lcd";
528 mgr->id = OMAP_DSS_CHANNEL_LCD;
529 break;
530 case 1:
531 mgr->name = "tv";
532 mgr->id = OMAP_DSS_CHANNEL_DIGIT;
533 break;
534 case 2:
535 mgr->name = "lcd2";
536 mgr->id = OMAP_DSS_CHANNEL_LCD2;
537 break;
538 }
539
540 mgr->set_device = &dss_mgr_set_device;
541 mgr->unset_device = &dss_mgr_unset_device;
542 mgr->apply = &omap_dss_mgr_apply;
543 mgr->set_manager_info = &dss_mgr_set_info;
544 mgr->get_manager_info = &dss_mgr_get_info;
545 mgr->wait_for_go = &dss_mgr_wait_for_go;
546 mgr->wait_for_vsync = &dss_mgr_wait_for_vsync;
547
548 mgr->caps = 0;
549 mgr->supported_displays =
550 dss_feat_get_supported_displays(mgr->id);
551
552 INIT_LIST_HEAD(&mgr->overlays);
553
554 r = kobject_init_and_add(&mgr->kobj, &manager_ktype,
555 &pdev->dev.kobj, "manager%d", i);
556
557 if (r)
558 DSSERR("failed to create sysfs file\n");
559 }
560
561 return 0;
562}
563
564void dss_uninit_overlay_managers(struct platform_device *pdev)
565{
566 int i;
567
568 for (i = 0; i < num_managers; ++i) {
569 struct omap_overlay_manager *mgr = &managers[i];
570
571 kobject_del(&mgr->kobj);
572 kobject_put(&mgr->kobj);
573 }
574
575 kfree(managers);
576 managers = NULL;
577 num_managers = 0;
578}
579
580int omap_dss_get_num_overlay_managers(void)
581{
582 return num_managers;
583}
584EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
585
586struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
587{
588 if (num >= num_managers)
589 return NULL;
590
591 return &managers[num];
592}
593EXPORT_SYMBOL(omap_dss_get_overlay_manager);
594
595int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
596 const struct omap_overlay_manager_info *info)
597{
598 if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
599 /*
600 * OMAP3 supports only graphics source transparency color key
601 * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
602 * Alpha Mode.
603 */
604 if (info->partial_alpha_enabled && info->trans_enabled
605 && info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
606 DSSERR("check_manager: illegal transparency key\n");
607 return -EINVAL;
608 }
609 }
610
611 return 0;
612}
613
614static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
615 struct omap_overlay_info **overlay_infos)
616{
617 struct omap_overlay *ovl1, *ovl2;
618 struct omap_overlay_info *info1, *info2;
619
620 list_for_each_entry(ovl1, &mgr->overlays, list) {
621 info1 = overlay_infos[ovl1->id];
622
623 if (info1 == NULL)
624 continue;
625
626 list_for_each_entry(ovl2, &mgr->overlays, list) {
627 if (ovl1 == ovl2)
628 continue;
629
630 info2 = overlay_infos[ovl2->id];
631
632 if (info2 == NULL)
633 continue;
634
635 if (info1->zorder == info2->zorder) {
636 DSSERR("overlays %d and %d have the same "
637 "zorder %d\n",
638 ovl1->id, ovl2->id, info1->zorder);
639 return -EINVAL;
640 }
641 }
642 }
643
644 return 0;
645}
646
647int dss_mgr_check(struct omap_overlay_manager *mgr,
648 struct omap_dss_device *dssdev,
649 struct omap_overlay_manager_info *info,
650 struct omap_overlay_info **overlay_infos)
651{
652 struct omap_overlay *ovl;
653 int r;
654
655 if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
656 r = dss_mgr_check_zorder(mgr, overlay_infos);
657 if (r)
658 return r;
659 }
660
661 list_for_each_entry(ovl, &mgr->overlays, list) {
662 struct omap_overlay_info *oi;
663 int r;
664
665 oi = overlay_infos[ovl->id];
666
667 if (oi == NULL)
668 continue;
669
670 r = dss_ovl_check(ovl, oi, dssdev);
671 if (r)
672 return r;
673 }
674
675 return 0;
676}