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 <plat/display.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 /* detach old manager */
89 r = ovl->unset_manager(ovl);
91 DSSERR("detach failed\n");
95 r = old_mgr->apply(old_mgr);
101 r = ovl->set_manager(ovl, mgr);
103 DSSERR("Failed to attach overlay\n");
115 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
117 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
118 ovl->info.width, ovl->info.height);
121 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
123 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
126 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
128 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
129 ovl->info.pos_x, ovl->info.pos_y);
132 static ssize_t overlay_position_store(struct omap_overlay *ovl,
133 const char *buf, size_t size)
137 struct omap_overlay_info info;
139 ovl->get_overlay_info(ovl, &info);
141 info.pos_x = simple_strtoul(buf, &last, 10);
143 if (last - buf >= size)
146 info.pos_y = simple_strtoul(last, &last, 10);
148 r = ovl->set_overlay_info(ovl, &info);
153 r = ovl->manager->apply(ovl->manager);
161 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
163 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
164 ovl->info.out_width, ovl->info.out_height);
167 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
168 const char *buf, size_t size)
172 struct omap_overlay_info info;
174 ovl->get_overlay_info(ovl, &info);
176 info.out_width = simple_strtoul(buf, &last, 10);
178 if (last - buf >= size)
181 info.out_height = simple_strtoul(last, &last, 10);
183 r = ovl->set_overlay_info(ovl, &info);
188 r = ovl->manager->apply(ovl->manager);
196 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
198 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
201 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
205 struct omap_overlay_info info;
207 ovl->get_overlay_info(ovl, &info);
209 info.enabled = simple_strtoul(buf, NULL, 10);
211 r = ovl->set_overlay_info(ovl, &info);
216 r = ovl->manager->apply(ovl->manager);
224 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
226 return snprintf(buf, PAGE_SIZE, "%d\n",
227 ovl->info.global_alpha);
230 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
231 const char *buf, size_t size)
234 struct omap_overlay_info info;
236 ovl->get_overlay_info(ovl, &info);
238 /* Video1 plane does not support global alpha
239 * to always make it 255 completely opaque
241 if (!dss_has_feature(FEAT_GLOBAL_ALPHA_VID1) &&
242 ovl->id == OMAP_DSS_VIDEO1)
243 info.global_alpha = 255;
245 info.global_alpha = simple_strtoul(buf, NULL, 10);
247 r = ovl->set_overlay_info(ovl, &info);
252 r = ovl->manager->apply(ovl->manager);
260 struct overlay_attribute {
261 struct attribute attr;
262 ssize_t (*show)(struct omap_overlay *, char *);
263 ssize_t (*store)(struct omap_overlay *, const char *, size_t);
266 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
267 struct overlay_attribute overlay_attr_##_name = \
268 __ATTR(_name, _mode, _show, _store)
270 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
271 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
272 overlay_manager_show, overlay_manager_store);
273 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
274 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
275 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
276 overlay_position_show, overlay_position_store);
277 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
278 overlay_output_size_show, overlay_output_size_store);
279 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
280 overlay_enabled_show, overlay_enabled_store);
281 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
282 overlay_global_alpha_show, overlay_global_alpha_store);
284 static struct attribute *overlay_sysfs_attrs[] = {
285 &overlay_attr_name.attr,
286 &overlay_attr_manager.attr,
287 &overlay_attr_input_size.attr,
288 &overlay_attr_screen_width.attr,
289 &overlay_attr_position.attr,
290 &overlay_attr_output_size.attr,
291 &overlay_attr_enabled.attr,
292 &overlay_attr_global_alpha.attr,
296 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
299 struct omap_overlay *overlay;
300 struct overlay_attribute *overlay_attr;
302 overlay = container_of(kobj, struct omap_overlay, kobj);
303 overlay_attr = container_of(attr, struct overlay_attribute, attr);
305 if (!overlay_attr->show)
308 return overlay_attr->show(overlay, buf);
311 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
312 const char *buf, size_t size)
314 struct omap_overlay *overlay;
315 struct overlay_attribute *overlay_attr;
317 overlay = container_of(kobj, struct omap_overlay, kobj);
318 overlay_attr = container_of(attr, struct overlay_attribute, attr);
320 if (!overlay_attr->store)
323 return overlay_attr->store(overlay, buf, size);
326 static const struct sysfs_ops overlay_sysfs_ops = {
327 .show = overlay_attr_show,
328 .store = overlay_attr_store,
331 static struct kobj_type overlay_ktype = {
332 .sysfs_ops = &overlay_sysfs_ops,
333 .default_attrs = overlay_sysfs_attrs,
336 /* Check if overlay parameters are compatible with display */
337 int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
339 struct omap_overlay_info *info;
346 if (!ovl->info.enabled)
351 if (info->paddr == 0) {
352 DSSDBG("check_overlay failed: paddr 0\n");
356 dssdev->driver->get_resolution(dssdev, &dw, &dh);
358 DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
360 info->pos_x, info->pos_y,
361 info->width, info->height,
362 info->out_width, info->out_height,
365 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
369 if (info->out_width == 0)
372 outw = info->out_width;
374 if (info->out_height == 0)
377 outh = info->out_height;
380 if (dw < info->pos_x + outw) {
381 DSSDBG("check_overlay failed 1: %d < %d + %d\n",
382 dw, info->pos_x, outw);
386 if (dh < info->pos_y + outh) {
387 DSSDBG("check_overlay failed 2: %d < %d + %d\n",
388 dh, info->pos_y, outh);
392 if ((ovl->supported_modes & info->color_mode) == 0) {
393 DSSERR("overlay doesn't support mode %d\n", info->color_mode);
400 static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
401 struct omap_overlay_info *info)
404 struct omap_overlay_info old_info;
406 old_info = ovl->info;
410 r = dss_check_overlay(ovl, ovl->manager->device);
412 ovl->info = old_info;
417 ovl->info_dirty = true;
422 static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
423 struct omap_overlay_info *info)
428 static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
430 return dss_mgr_wait_for_go_ovl(ovl);
433 static int omap_dss_set_manager(struct omap_overlay *ovl,
434 struct omap_overlay_manager *mgr)
440 DSSERR("overlay '%s' already has a manager '%s'\n",
441 ovl->name, ovl->manager->name);
445 if (ovl->info.enabled) {
446 DSSERR("overlay has to be disabled to change the manager\n");
452 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
453 /* XXX: on manual update display, in auto update mode, a bug happens
454 * here. When an overlay is first enabled on LCD, then it's disabled,
455 * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT
456 * errors. Waiting before changing the channel_out fixes it. I'm
457 * guessing that the overlay is still somehow being used for the LCD,
458 * but I don't understand how or why. */
460 dispc_set_channel_out(ovl->id, mgr->id);
461 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
466 static int omap_dss_unset_manager(struct omap_overlay *ovl)
471 DSSERR("failed to detach overlay: manager not set\n");
475 if (ovl->info.enabled) {
476 DSSERR("overlay has to be disabled to unset the manager\n");
480 r = ovl->wait_for_go(ovl);
489 int omap_dss_get_num_overlays(void)
493 EXPORT_SYMBOL(omap_dss_get_num_overlays);
495 struct omap_overlay *omap_dss_get_overlay(int num)
498 struct omap_overlay *ovl;
500 list_for_each_entry(ovl, &overlay_list, list) {
507 EXPORT_SYMBOL(omap_dss_get_overlay);
509 static void omap_dss_add_overlay(struct omap_overlay *overlay)
512 list_add_tail(&overlay->list, &overlay_list);
515 static struct omap_overlay *dispc_overlays[MAX_DSS_OVERLAYS];
517 void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
519 mgr->num_overlays = dss_feat_get_num_ovls();
520 mgr->overlays = dispc_overlays;
524 static struct omap_overlay *l4_overlays[1];
525 void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
527 mgr->num_overlays = 1;
528 mgr->overlays = l4_overlays;
532 void dss_init_overlays(struct platform_device *pdev)
536 INIT_LIST_HEAD(&overlay_list);
540 for (i = 0; i < dss_feat_get_num_ovls(); ++i) {
541 struct omap_overlay *ovl;
542 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
549 ovl->id = OMAP_DSS_GFX;
550 ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
551 ovl->info.global_alpha = 255;
555 ovl->id = OMAP_DSS_VIDEO1;
556 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
557 OMAP_DSS_OVL_CAP_DISPC;
558 ovl->info.global_alpha = 255;
562 ovl->id = OMAP_DSS_VIDEO2;
563 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
564 OMAP_DSS_OVL_CAP_DISPC;
565 ovl->info.global_alpha = 255;
569 ovl->set_manager = &omap_dss_set_manager;
570 ovl->unset_manager = &omap_dss_unset_manager;
571 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
572 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
573 ovl->wait_for_go = &dss_ovl_wait_for_go;
575 ovl->supported_modes =
576 dss_feat_get_supported_color_modes(ovl->id);
578 omap_dss_add_overlay(ovl);
580 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
581 &pdev->dev.kobj, "overlay%d", i);
584 DSSERR("failed to create sysfs file\n");
588 dispc_overlays[i] = ovl;
593 struct omap_overlay *ovl;
594 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
599 ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;
601 ovl->set_manager = &omap_dss_set_manager;
602 ovl->unset_manager = &omap_dss_unset_manager;
603 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
604 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
606 omap_dss_add_overlay(ovl);
608 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
609 &pdev->dev.kobj, "overlayl4");
612 DSSERR("failed to create sysfs file\n");
614 l4_overlays[0] = ovl;
619 /* connect overlays to the new device, if not already connected. if force
620 * selected, connect always. */
621 void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
624 struct omap_overlay_manager *lcd_mgr;
625 struct omap_overlay_manager *tv_mgr;
626 struct omap_overlay_manager *mgr = NULL;
628 lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
629 tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
631 if (dssdev->type != OMAP_DISPLAY_TYPE_VENC) {
632 if (!lcd_mgr->device || force) {
634 lcd_mgr->unset_device(lcd_mgr);
635 lcd_mgr->set_device(lcd_mgr, dssdev);
640 if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
641 if (!tv_mgr->device || force) {
643 tv_mgr->unset_device(tv_mgr);
644 tv_mgr->set_device(tv_mgr, dssdev);
650 for (i = 0; i < dss_feat_get_num_ovls(); i++) {
651 struct omap_overlay *ovl;
652 ovl = omap_dss_get_overlay(i);
653 if (!ovl->manager || force) {
655 omap_dss_unset_manager(ovl);
656 omap_dss_set_manager(ovl, mgr);
662 void dss_uninit_overlays(struct platform_device *pdev)
664 struct omap_overlay *ovl;
666 while (!list_empty(&overlay_list)) {
667 ovl = list_first_entry(&overlay_list,
668 struct omap_overlay, list);
669 list_del(&ovl->list);
670 kobject_del(&ovl->kobj);
671 kobject_put(&ovl->kobj);