2 * linux/drivers/video/omap2/dss/overlay.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * Some code and ideas taken from drivers/video/omap/ driver
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.
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
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/>.
23 #define DSS_SUBSYS_NAME "OVERLAY"
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/err.h>
28 #include <linux/sysfs.h>
29 #include <linux/kobject.h>
30 #include <linux/platform_device.h>
31 #include <linux/delay.h>
32 #include <linux/slab.h>
34 #include <video/omapdss.h>
38 #include "dss_features.h"
40 static int num_overlays;
41 static struct list_head overlay_list;
43 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
45 return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
48 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
50 return snprintf(buf, PAGE_SIZE, "%s\n",
51 ovl->manager ? ovl->manager->name : "<none>");
54 static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
58 struct omap_overlay_manager *mgr = NULL;
59 struct omap_overlay_manager *old_mgr;
62 if (buf[size-1] == '\n')
66 for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
67 mgr = omap_dss_get_overlay_manager(i);
69 if (sysfs_streq(buf, mgr->name))
76 if (len > 0 && mgr == NULL)
80 DSSDBG("manager %s found\n", mgr->name);
82 if (mgr == ovl->manager)
85 old_mgr = ovl->manager;
87 r = dispc_runtime_get();
91 /* detach old manager */
93 r = ovl->unset_manager(ovl);
95 DSSERR("detach failed\n");
99 r = old_mgr->apply(old_mgr);
105 r = ovl->set_manager(ovl, mgr);
107 DSSERR("Failed to attach overlay\n");
125 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
127 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
128 ovl->info.width, ovl->info.height);
131 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
133 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
136 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
138 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
139 ovl->info.pos_x, ovl->info.pos_y);
142 static ssize_t overlay_position_store(struct omap_overlay *ovl,
143 const char *buf, size_t size)
147 struct omap_overlay_info info;
149 ovl->get_overlay_info(ovl, &info);
151 info.pos_x = simple_strtoul(buf, &last, 10);
153 if (last - buf >= size)
156 info.pos_y = simple_strtoul(last, &last, 10);
158 r = ovl->set_overlay_info(ovl, &info);
163 r = ovl->manager->apply(ovl->manager);
171 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
173 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
174 ovl->info.out_width, ovl->info.out_height);
177 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
178 const char *buf, size_t size)
182 struct omap_overlay_info info;
184 ovl->get_overlay_info(ovl, &info);
186 info.out_width = simple_strtoul(buf, &last, 10);
188 if (last - buf >= size)
191 info.out_height = simple_strtoul(last, &last, 10);
193 r = ovl->set_overlay_info(ovl, &info);
198 r = ovl->manager->apply(ovl->manager);
206 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
208 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
211 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
215 struct omap_overlay_info info;
217 ovl->get_overlay_info(ovl, &info);
219 r = kstrtoint(buf, 0, &enable);
223 info.enabled = !!enable;
225 r = ovl->set_overlay_info(ovl, &info);
230 r = ovl->manager->apply(ovl->manager);
238 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
240 return snprintf(buf, PAGE_SIZE, "%d\n",
241 ovl->info.global_alpha);
244 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
245 const char *buf, size_t size)
249 struct omap_overlay_info info;
251 if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
254 r = kstrtou8(buf, 0, &alpha);
258 ovl->get_overlay_info(ovl, &info);
260 /* Video1 plane does not support global alpha
261 * to always make it 255 completely opaque
263 if (!dss_has_feature(FEAT_GLOBAL_ALPHA_VID1) &&
264 ovl->id == OMAP_DSS_VIDEO1)
265 info.global_alpha = 255;
267 info.global_alpha = alpha;
269 r = ovl->set_overlay_info(ovl, &info);
274 r = ovl->manager->apply(ovl->manager);
282 static ssize_t overlay_pre_mult_alpha_show(struct omap_overlay *ovl,
285 return snprintf(buf, PAGE_SIZE, "%d\n",
286 ovl->info.pre_mult_alpha);
289 static ssize_t overlay_pre_mult_alpha_store(struct omap_overlay *ovl,
290 const char *buf, size_t size)
294 struct omap_overlay_info info;
296 r = kstrtou8(buf, 0, &alpha);
300 ovl->get_overlay_info(ovl, &info);
302 /* only GFX and Video2 plane support pre alpha multiplied
303 * set zero for Video1 plane
305 if (!dss_has_feature(FEAT_GLOBAL_ALPHA_VID1) &&
306 ovl->id == OMAP_DSS_VIDEO1)
307 info.pre_mult_alpha = 0;
309 info.pre_mult_alpha = alpha;
311 r = ovl->set_overlay_info(ovl, &info);
316 r = ovl->manager->apply(ovl->manager);
324 struct overlay_attribute {
325 struct attribute attr;
326 ssize_t (*show)(struct omap_overlay *, char *);
327 ssize_t (*store)(struct omap_overlay *, const char *, size_t);
330 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
331 struct overlay_attribute overlay_attr_##_name = \
332 __ATTR(_name, _mode, _show, _store)
334 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
335 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
336 overlay_manager_show, overlay_manager_store);
337 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
338 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
339 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
340 overlay_position_show, overlay_position_store);
341 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
342 overlay_output_size_show, overlay_output_size_store);
343 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
344 overlay_enabled_show, overlay_enabled_store);
345 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
346 overlay_global_alpha_show, overlay_global_alpha_store);
347 static OVERLAY_ATTR(pre_mult_alpha, S_IRUGO|S_IWUSR,
348 overlay_pre_mult_alpha_show,
349 overlay_pre_mult_alpha_store);
351 static struct attribute *overlay_sysfs_attrs[] = {
352 &overlay_attr_name.attr,
353 &overlay_attr_manager.attr,
354 &overlay_attr_input_size.attr,
355 &overlay_attr_screen_width.attr,
356 &overlay_attr_position.attr,
357 &overlay_attr_output_size.attr,
358 &overlay_attr_enabled.attr,
359 &overlay_attr_global_alpha.attr,
360 &overlay_attr_pre_mult_alpha.attr,
364 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
367 struct omap_overlay *overlay;
368 struct overlay_attribute *overlay_attr;
370 overlay = container_of(kobj, struct omap_overlay, kobj);
371 overlay_attr = container_of(attr, struct overlay_attribute, attr);
373 if (!overlay_attr->show)
376 return overlay_attr->show(overlay, buf);
379 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
380 const char *buf, size_t size)
382 struct omap_overlay *overlay;
383 struct overlay_attribute *overlay_attr;
385 overlay = container_of(kobj, struct omap_overlay, kobj);
386 overlay_attr = container_of(attr, struct overlay_attribute, attr);
388 if (!overlay_attr->store)
391 return overlay_attr->store(overlay, buf, size);
394 static const struct sysfs_ops overlay_sysfs_ops = {
395 .show = overlay_attr_show,
396 .store = overlay_attr_store,
399 static struct kobj_type overlay_ktype = {
400 .sysfs_ops = &overlay_sysfs_ops,
401 .default_attrs = overlay_sysfs_attrs,
404 /* Check if overlay parameters are compatible with display */
405 int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
407 struct omap_overlay_info *info;
414 if (!ovl->info.enabled)
419 if (info->paddr == 0) {
420 DSSDBG("check_overlay failed: paddr 0\n");
424 dssdev->driver->get_resolution(dssdev, &dw, &dh);
426 DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
428 info->pos_x, info->pos_y,
429 info->width, info->height,
430 info->out_width, info->out_height,
433 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
437 if (info->out_width == 0)
440 outw = info->out_width;
442 if (info->out_height == 0)
445 outh = info->out_height;
448 if (dw < info->pos_x + outw) {
449 DSSDBG("check_overlay failed 1: %d < %d + %d\n",
450 dw, info->pos_x, outw);
454 if (dh < info->pos_y + outh) {
455 DSSDBG("check_overlay failed 2: %d < %d + %d\n",
456 dh, info->pos_y, outh);
460 if ((ovl->supported_modes & info->color_mode) == 0) {
461 DSSERR("overlay doesn't support mode %d\n", info->color_mode);
468 static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
469 struct omap_overlay_info *info)
472 struct omap_overlay_info old_info;
474 old_info = ovl->info;
478 r = dss_check_overlay(ovl, ovl->manager->device);
480 ovl->info = old_info;
485 ovl->info_dirty = true;
490 static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
491 struct omap_overlay_info *info)
496 static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
498 return dss_mgr_wait_for_go_ovl(ovl);
501 static int omap_dss_set_manager(struct omap_overlay *ovl,
502 struct omap_overlay_manager *mgr)
508 DSSERR("overlay '%s' already has a manager '%s'\n",
509 ovl->name, ovl->manager->name);
513 if (ovl->info.enabled) {
514 DSSERR("overlay has to be disabled to change the manager\n");
519 ovl->manager_changed = true;
521 /* XXX: When there is an overlay on a DSI manual update display, and
522 * the overlay is first disabled, then moved to tv, and enabled, we
523 * seem to get SYNC_LOST_DIGIT error.
525 * Waiting doesn't seem to help, but updating the manual update display
526 * after disabling the overlay seems to fix this. This hints that the
527 * overlay is perhaps somehow tied to the LCD output until the output
530 * Userspace workaround for this is to update the LCD after disabling
531 * the overlay, but before moving the overlay to TV.
537 static int omap_dss_unset_manager(struct omap_overlay *ovl)
540 DSSERR("failed to detach overlay: manager not set\n");
544 if (ovl->info.enabled) {
545 DSSERR("overlay has to be disabled to unset the manager\n");
550 ovl->manager_changed = true;
555 int omap_dss_get_num_overlays(void)
559 EXPORT_SYMBOL(omap_dss_get_num_overlays);
561 struct omap_overlay *omap_dss_get_overlay(int num)
564 struct omap_overlay *ovl;
566 list_for_each_entry(ovl, &overlay_list, list) {
573 EXPORT_SYMBOL(omap_dss_get_overlay);
575 static void omap_dss_add_overlay(struct omap_overlay *overlay)
578 list_add_tail(&overlay->list, &overlay_list);
581 static struct omap_overlay *dispc_overlays[MAX_DSS_OVERLAYS];
583 void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
585 mgr->num_overlays = dss_feat_get_num_ovls();
586 mgr->overlays = dispc_overlays;
590 static struct omap_overlay *l4_overlays[1];
591 void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
593 mgr->num_overlays = 1;
594 mgr->overlays = l4_overlays;
598 void dss_init_overlays(struct platform_device *pdev)
602 INIT_LIST_HEAD(&overlay_list);
606 for (i = 0; i < dss_feat_get_num_ovls(); ++i) {
607 struct omap_overlay *ovl;
608 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
615 ovl->id = OMAP_DSS_GFX;
616 ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
617 ovl->info.global_alpha = 255;
621 ovl->id = OMAP_DSS_VIDEO1;
622 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
623 OMAP_DSS_OVL_CAP_DISPC;
624 ovl->info.global_alpha = 255;
628 ovl->id = OMAP_DSS_VIDEO2;
629 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
630 OMAP_DSS_OVL_CAP_DISPC;
631 ovl->info.global_alpha = 255;
635 ovl->set_manager = &omap_dss_set_manager;
636 ovl->unset_manager = &omap_dss_unset_manager;
637 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
638 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
639 ovl->wait_for_go = &dss_ovl_wait_for_go;
641 ovl->supported_modes =
642 dss_feat_get_supported_color_modes(ovl->id);
644 omap_dss_add_overlay(ovl);
646 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
647 &pdev->dev.kobj, "overlay%d", i);
650 DSSERR("failed to create sysfs file\n");
654 dispc_overlays[i] = ovl;
659 struct omap_overlay *ovl;
660 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
665 ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;
667 ovl->set_manager = &omap_dss_set_manager;
668 ovl->unset_manager = &omap_dss_unset_manager;
669 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
670 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
672 omap_dss_add_overlay(ovl);
674 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
675 &pdev->dev.kobj, "overlayl4");
678 DSSERR("failed to create sysfs file\n");
680 l4_overlays[0] = ovl;
685 /* connect overlays to the new device, if not already connected. if force
686 * selected, connect always. */
687 void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
690 struct omap_overlay_manager *lcd_mgr;
691 struct omap_overlay_manager *tv_mgr;
692 struct omap_overlay_manager *lcd2_mgr = NULL;
693 struct omap_overlay_manager *mgr = NULL;
695 lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
696 tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
697 if (dss_has_feature(FEAT_MGR_LCD2))
698 lcd2_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD2);
700 if (dssdev->channel == OMAP_DSS_CHANNEL_LCD2) {
701 if (!lcd2_mgr->device || force) {
702 if (lcd2_mgr->device)
703 lcd2_mgr->unset_device(lcd2_mgr);
704 lcd2_mgr->set_device(lcd2_mgr, dssdev);
707 } else if (dssdev->type != OMAP_DISPLAY_TYPE_VENC
708 && dssdev->type != OMAP_DISPLAY_TYPE_HDMI) {
709 if (!lcd_mgr->device || force) {
711 lcd_mgr->unset_device(lcd_mgr);
712 lcd_mgr->set_device(lcd_mgr, dssdev);
717 if (dssdev->type == OMAP_DISPLAY_TYPE_VENC
718 || dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
719 if (!tv_mgr->device || force) {
721 tv_mgr->unset_device(tv_mgr);
722 tv_mgr->set_device(tv_mgr, dssdev);
730 for (i = 0; i < dss_feat_get_num_ovls(); i++) {
731 struct omap_overlay *ovl;
732 ovl = omap_dss_get_overlay(i);
733 if (!ovl->manager || force) {
735 omap_dss_unset_manager(ovl);
736 omap_dss_set_manager(ovl, mgr);
744 void dss_uninit_overlays(struct platform_device *pdev)
746 struct omap_overlay *ovl;
748 while (!list_empty(&overlay_list)) {
749 ovl = list_first_entry(&overlay_list,
750 struct omap_overlay, list);
751 list_del(&ovl->list);
752 kobject_del(&ovl->kobj);
753 kobject_put(&ovl->kobj);