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>
33 #include <plat/display.h>
38 static int num_overlays;
39 static struct list_head overlay_list;
41 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
43 return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
46 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
48 return snprintf(buf, PAGE_SIZE, "%s\n",
49 ovl->manager ? ovl->manager->name : "<none>");
52 static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
56 struct omap_overlay_manager *mgr = NULL;
57 struct omap_overlay_manager *old_mgr;
60 if (buf[size-1] == '\n')
64 for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
65 mgr = omap_dss_get_overlay_manager(i);
67 if (strncmp(buf, mgr->name, len) == 0)
74 if (len > 0 && mgr == NULL)
78 DSSDBG("manager %s found\n", mgr->name);
80 if (mgr == ovl->manager)
83 old_mgr = ovl->manager;
85 /* detach old manager */
87 r = ovl->unset_manager(ovl);
89 DSSERR("detach failed\n");
93 r = old_mgr->apply(old_mgr);
99 r = ovl->set_manager(ovl, mgr);
101 DSSERR("Failed to attach overlay\n");
113 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
115 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
116 ovl->info.width, ovl->info.height);
119 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
121 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
124 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
126 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
127 ovl->info.pos_x, ovl->info.pos_y);
130 static ssize_t overlay_position_store(struct omap_overlay *ovl,
131 const char *buf, size_t size)
135 struct omap_overlay_info info;
137 ovl->get_overlay_info(ovl, &info);
139 info.pos_x = simple_strtoul(buf, &last, 10);
141 if (last - buf >= size)
144 info.pos_y = simple_strtoul(last, &last, 10);
146 r = ovl->set_overlay_info(ovl, &info);
151 r = ovl->manager->apply(ovl->manager);
159 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
161 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
162 ovl->info.out_width, ovl->info.out_height);
165 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
166 const char *buf, size_t size)
170 struct omap_overlay_info info;
172 ovl->get_overlay_info(ovl, &info);
174 info.out_width = simple_strtoul(buf, &last, 10);
176 if (last - buf >= size)
179 info.out_height = simple_strtoul(last, &last, 10);
181 r = ovl->set_overlay_info(ovl, &info);
186 r = ovl->manager->apply(ovl->manager);
194 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
196 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
199 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
203 struct omap_overlay_info info;
205 ovl->get_overlay_info(ovl, &info);
207 info.enabled = simple_strtoul(buf, NULL, 10);
209 r = ovl->set_overlay_info(ovl, &info);
214 r = ovl->manager->apply(ovl->manager);
222 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
224 return snprintf(buf, PAGE_SIZE, "%d\n",
225 ovl->info.global_alpha);
228 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
229 const char *buf, size_t size)
232 struct omap_overlay_info info;
234 ovl->get_overlay_info(ovl, &info);
236 /* Video1 plane does not support global alpha
237 * to always make it 255 completely opaque
239 if (ovl->id == OMAP_DSS_VIDEO1)
240 info.global_alpha = 255;
242 info.global_alpha = simple_strtoul(buf, NULL, 10);
244 r = ovl->set_overlay_info(ovl, &info);
249 r = ovl->manager->apply(ovl->manager);
257 struct overlay_attribute {
258 struct attribute attr;
259 ssize_t (*show)(struct omap_overlay *, char *);
260 ssize_t (*store)(struct omap_overlay *, const char *, size_t);
263 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
264 struct overlay_attribute overlay_attr_##_name = \
265 __ATTR(_name, _mode, _show, _store)
267 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
268 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
269 overlay_manager_show, overlay_manager_store);
270 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
271 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
272 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
273 overlay_position_show, overlay_position_store);
274 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
275 overlay_output_size_show, overlay_output_size_store);
276 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
277 overlay_enabled_show, overlay_enabled_store);
278 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
279 overlay_global_alpha_show, overlay_global_alpha_store);
281 static struct attribute *overlay_sysfs_attrs[] = {
282 &overlay_attr_name.attr,
283 &overlay_attr_manager.attr,
284 &overlay_attr_input_size.attr,
285 &overlay_attr_screen_width.attr,
286 &overlay_attr_position.attr,
287 &overlay_attr_output_size.attr,
288 &overlay_attr_enabled.attr,
289 &overlay_attr_global_alpha.attr,
293 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
296 struct omap_overlay *overlay;
297 struct overlay_attribute *overlay_attr;
299 overlay = container_of(kobj, struct omap_overlay, kobj);
300 overlay_attr = container_of(attr, struct overlay_attribute, attr);
302 if (!overlay_attr->show)
305 return overlay_attr->show(overlay, buf);
308 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
309 const char *buf, size_t size)
311 struct omap_overlay *overlay;
312 struct overlay_attribute *overlay_attr;
314 overlay = container_of(kobj, struct omap_overlay, kobj);
315 overlay_attr = container_of(attr, struct overlay_attribute, attr);
317 if (!overlay_attr->store)
320 return overlay_attr->store(overlay, buf, size);
323 static const struct sysfs_ops overlay_sysfs_ops = {
324 .show = overlay_attr_show,
325 .store = overlay_attr_store,
328 static struct kobj_type overlay_ktype = {
329 .sysfs_ops = &overlay_sysfs_ops,
330 .default_attrs = overlay_sysfs_attrs,
333 /* Check if overlay parameters are compatible with display */
334 int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
336 struct omap_overlay_info *info;
343 if (!ovl->info.enabled)
348 if (info->paddr == 0) {
349 DSSDBG("check_overlay failed: paddr 0\n");
353 dssdev->driver->get_resolution(dssdev, &dw, &dh);
355 DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
357 info->pos_x, info->pos_y,
358 info->width, info->height,
359 info->out_width, info->out_height,
362 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
366 if (info->out_width == 0)
369 outw = info->out_width;
371 if (info->out_height == 0)
374 outh = info->out_height;
377 if (dw < info->pos_x + outw) {
378 DSSDBG("check_overlay failed 1: %d < %d + %d\n",
379 dw, info->pos_x, outw);
383 if (dh < info->pos_y + outh) {
384 DSSDBG("check_overlay failed 2: %d < %d + %d\n",
385 dh, info->pos_y, outh);
389 if ((ovl->supported_modes & info->color_mode) == 0) {
390 DSSERR("overlay doesn't support mode %d\n", info->color_mode);
397 static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
398 struct omap_overlay_info *info)
401 struct omap_overlay_info old_info;
403 old_info = ovl->info;
407 r = dss_check_overlay(ovl, ovl->manager->device);
409 ovl->info = old_info;
414 ovl->info_dirty = true;
419 static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
420 struct omap_overlay_info *info)
425 static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
427 return dss_mgr_wait_for_go_ovl(ovl);
430 static int omap_dss_set_manager(struct omap_overlay *ovl,
431 struct omap_overlay_manager *mgr)
437 DSSERR("overlay '%s' already has a manager '%s'\n",
438 ovl->name, ovl->manager->name);
442 if (ovl->info.enabled) {
443 DSSERR("overlay has to be disabled to change the manager\n");
449 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
450 /* XXX: on manual update display, in auto update mode, a bug happens
451 * here. When an overlay is first enabled on LCD, then it's disabled,
452 * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT
453 * errors. Waiting before changing the channel_out fixes it. I'm
454 * guessing that the overlay is still somehow being used for the LCD,
455 * but I don't understand how or why. */
457 dispc_set_channel_out(ovl->id, mgr->id);
458 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
463 static int omap_dss_unset_manager(struct omap_overlay *ovl)
468 DSSERR("failed to detach overlay: manager not set\n");
472 if (ovl->info.enabled) {
473 DSSERR("overlay has to be disabled to unset the manager\n");
477 r = ovl->wait_for_go(ovl);
486 int omap_dss_get_num_overlays(void)
490 EXPORT_SYMBOL(omap_dss_get_num_overlays);
492 struct omap_overlay *omap_dss_get_overlay(int num)
495 struct omap_overlay *ovl;
497 list_for_each_entry(ovl, &overlay_list, list) {
504 EXPORT_SYMBOL(omap_dss_get_overlay);
506 static void omap_dss_add_overlay(struct omap_overlay *overlay)
509 list_add_tail(&overlay->list, &overlay_list);
512 static struct omap_overlay *dispc_overlays[3];
514 void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
516 mgr->num_overlays = 3;
517 mgr->overlays = dispc_overlays;
521 static struct omap_overlay *l4_overlays[1];
522 void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
524 mgr->num_overlays = 1;
525 mgr->overlays = l4_overlays;
529 void dss_init_overlays(struct platform_device *pdev)
533 INIT_LIST_HEAD(&overlay_list);
537 for (i = 0; i < 3; ++i) {
538 struct omap_overlay *ovl;
539 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
546 ovl->id = OMAP_DSS_GFX;
547 ovl->supported_modes = cpu_is_omap34xx() ?
548 OMAP_DSS_COLOR_GFX_OMAP3 :
549 OMAP_DSS_COLOR_GFX_OMAP2;
550 ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
551 ovl->info.global_alpha = 255;
555 ovl->id = OMAP_DSS_VIDEO1;
556 ovl->supported_modes = cpu_is_omap34xx() ?
557 OMAP_DSS_COLOR_VID1_OMAP3 :
558 OMAP_DSS_COLOR_VID_OMAP2;
559 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
560 OMAP_DSS_OVL_CAP_DISPC;
561 ovl->info.global_alpha = 255;
565 ovl->id = OMAP_DSS_VIDEO2;
566 ovl->supported_modes = cpu_is_omap34xx() ?
567 OMAP_DSS_COLOR_VID2_OMAP3 :
568 OMAP_DSS_COLOR_VID_OMAP2;
569 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
570 OMAP_DSS_OVL_CAP_DISPC;
571 ovl->info.global_alpha = 255;
575 ovl->set_manager = &omap_dss_set_manager;
576 ovl->unset_manager = &omap_dss_unset_manager;
577 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
578 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
579 ovl->wait_for_go = &dss_ovl_wait_for_go;
581 omap_dss_add_overlay(ovl);
583 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
584 &pdev->dev.kobj, "overlay%d", i);
587 DSSERR("failed to create sysfs file\n");
591 dispc_overlays[i] = ovl;
596 struct omap_overlay *ovl;
597 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
602 ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;
604 ovl->set_manager = &omap_dss_set_manager;
605 ovl->unset_manager = &omap_dss_unset_manager;
606 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
607 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
609 omap_dss_add_overlay(ovl);
611 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
612 &pdev->dev.kobj, "overlayl4");
615 DSSERR("failed to create sysfs file\n");
617 l4_overlays[0] = ovl;
622 /* connect overlays to the new device, if not already connected. if force
623 * selected, connect always. */
624 void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
627 struct omap_overlay_manager *lcd_mgr;
628 struct omap_overlay_manager *tv_mgr;
629 struct omap_overlay_manager *mgr = NULL;
631 lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
632 tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
634 if (dssdev->type != OMAP_DISPLAY_TYPE_VENC) {
635 if (!lcd_mgr->device || force) {
637 lcd_mgr->unset_device(lcd_mgr);
638 lcd_mgr->set_device(lcd_mgr, dssdev);
643 if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
644 if (!tv_mgr->device || force) {
646 tv_mgr->unset_device(tv_mgr);
647 tv_mgr->set_device(tv_mgr, dssdev);
653 for (i = 0; i < 3; i++) {
654 struct omap_overlay *ovl;
655 ovl = omap_dss_get_overlay(i);
656 if (!ovl->manager || force) {
658 omap_dss_unset_manager(ovl);
659 omap_dss_set_manager(ovl, mgr);
665 void dss_uninit_overlays(struct platform_device *pdev)
667 struct omap_overlay *ovl;
669 while (!list_empty(&overlay_list)) {
670 ovl = list_first_entry(&overlay_list,
671 struct omap_overlay, list);
672 list_del(&ovl->list);
673 kobject_del(&ovl->kobj);
674 kobject_put(&ovl->kobj);