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>
39 static int num_overlays;
40 static struct list_head overlay_list;
42 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
44 return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
47 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
49 return snprintf(buf, PAGE_SIZE, "%s\n",
50 ovl->manager ? ovl->manager->name : "<none>");
53 static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf,
57 struct omap_overlay_manager *mgr = NULL;
58 struct omap_overlay_manager *old_mgr;
61 if (buf[size-1] == '\n')
65 for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
66 mgr = omap_dss_get_overlay_manager(i);
68 if (sysfs_streq(buf, mgr->name))
75 if (len > 0 && mgr == NULL)
79 DSSDBG("manager %s found\n", mgr->name);
81 if (mgr == ovl->manager)
84 old_mgr = ovl->manager;
86 /* detach old manager */
88 r = ovl->unset_manager(ovl);
90 DSSERR("detach failed\n");
94 r = old_mgr->apply(old_mgr);
100 r = ovl->set_manager(ovl, mgr);
102 DSSERR("Failed to attach overlay\n");
114 static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
116 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
117 ovl->info.width, ovl->info.height);
120 static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
122 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
125 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
127 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
128 ovl->info.pos_x, ovl->info.pos_y);
131 static ssize_t overlay_position_store(struct omap_overlay *ovl,
132 const char *buf, size_t size)
136 struct omap_overlay_info info;
138 ovl->get_overlay_info(ovl, &info);
140 info.pos_x = simple_strtoul(buf, &last, 10);
142 if (last - buf >= size)
145 info.pos_y = simple_strtoul(last, &last, 10);
147 r = ovl->set_overlay_info(ovl, &info);
152 r = ovl->manager->apply(ovl->manager);
160 static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
162 return snprintf(buf, PAGE_SIZE, "%d,%d\n",
163 ovl->info.out_width, ovl->info.out_height);
166 static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
167 const char *buf, size_t size)
171 struct omap_overlay_info info;
173 ovl->get_overlay_info(ovl, &info);
175 info.out_width = simple_strtoul(buf, &last, 10);
177 if (last - buf >= size)
180 info.out_height = simple_strtoul(last, &last, 10);
182 r = ovl->set_overlay_info(ovl, &info);
187 r = ovl->manager->apply(ovl->manager);
195 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
197 return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
200 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
204 struct omap_overlay_info info;
206 ovl->get_overlay_info(ovl, &info);
208 info.enabled = simple_strtoul(buf, NULL, 10);
210 r = ovl->set_overlay_info(ovl, &info);
215 r = ovl->manager->apply(ovl->manager);
223 static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
225 return snprintf(buf, PAGE_SIZE, "%d\n",
226 ovl->info.global_alpha);
229 static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
230 const char *buf, size_t size)
233 struct omap_overlay_info info;
235 ovl->get_overlay_info(ovl, &info);
237 /* Video1 plane does not support global alpha
238 * to always make it 255 completely opaque
240 if (ovl->id == OMAP_DSS_VIDEO1)
241 info.global_alpha = 255;
243 info.global_alpha = simple_strtoul(buf, NULL, 10);
245 r = ovl->set_overlay_info(ovl, &info);
250 r = ovl->manager->apply(ovl->manager);
258 struct overlay_attribute {
259 struct attribute attr;
260 ssize_t (*show)(struct omap_overlay *, char *);
261 ssize_t (*store)(struct omap_overlay *, const char *, size_t);
264 #define OVERLAY_ATTR(_name, _mode, _show, _store) \
265 struct overlay_attribute overlay_attr_##_name = \
266 __ATTR(_name, _mode, _show, _store)
268 static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
269 static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
270 overlay_manager_show, overlay_manager_store);
271 static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
272 static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
273 static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
274 overlay_position_show, overlay_position_store);
275 static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
276 overlay_output_size_show, overlay_output_size_store);
277 static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
278 overlay_enabled_show, overlay_enabled_store);
279 static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
280 overlay_global_alpha_show, overlay_global_alpha_store);
282 static struct attribute *overlay_sysfs_attrs[] = {
283 &overlay_attr_name.attr,
284 &overlay_attr_manager.attr,
285 &overlay_attr_input_size.attr,
286 &overlay_attr_screen_width.attr,
287 &overlay_attr_position.attr,
288 &overlay_attr_output_size.attr,
289 &overlay_attr_enabled.attr,
290 &overlay_attr_global_alpha.attr,
294 static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr,
297 struct omap_overlay *overlay;
298 struct overlay_attribute *overlay_attr;
300 overlay = container_of(kobj, struct omap_overlay, kobj);
301 overlay_attr = container_of(attr, struct overlay_attribute, attr);
303 if (!overlay_attr->show)
306 return overlay_attr->show(overlay, buf);
309 static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
310 const char *buf, size_t size)
312 struct omap_overlay *overlay;
313 struct overlay_attribute *overlay_attr;
315 overlay = container_of(kobj, struct omap_overlay, kobj);
316 overlay_attr = container_of(attr, struct overlay_attribute, attr);
318 if (!overlay_attr->store)
321 return overlay_attr->store(overlay, buf, size);
324 static const struct sysfs_ops overlay_sysfs_ops = {
325 .show = overlay_attr_show,
326 .store = overlay_attr_store,
329 static struct kobj_type overlay_ktype = {
330 .sysfs_ops = &overlay_sysfs_ops,
331 .default_attrs = overlay_sysfs_attrs,
334 /* Check if overlay parameters are compatible with display */
335 int dss_check_overlay(struct omap_overlay *ovl, struct omap_dss_device *dssdev)
337 struct omap_overlay_info *info;
344 if (!ovl->info.enabled)
349 if (info->paddr == 0) {
350 DSSDBG("check_overlay failed: paddr 0\n");
354 dssdev->driver->get_resolution(dssdev, &dw, &dh);
356 DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
358 info->pos_x, info->pos_y,
359 info->width, info->height,
360 info->out_width, info->out_height,
363 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
367 if (info->out_width == 0)
370 outw = info->out_width;
372 if (info->out_height == 0)
375 outh = info->out_height;
378 if (dw < info->pos_x + outw) {
379 DSSDBG("check_overlay failed 1: %d < %d + %d\n",
380 dw, info->pos_x, outw);
384 if (dh < info->pos_y + outh) {
385 DSSDBG("check_overlay failed 2: %d < %d + %d\n",
386 dh, info->pos_y, outh);
390 if ((ovl->supported_modes & info->color_mode) == 0) {
391 DSSERR("overlay doesn't support mode %d\n", info->color_mode);
398 static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
399 struct omap_overlay_info *info)
402 struct omap_overlay_info old_info;
404 old_info = ovl->info;
408 r = dss_check_overlay(ovl, ovl->manager->device);
410 ovl->info = old_info;
415 ovl->info_dirty = true;
420 static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
421 struct omap_overlay_info *info)
426 static int dss_ovl_wait_for_go(struct omap_overlay *ovl)
428 return dss_mgr_wait_for_go_ovl(ovl);
431 static int omap_dss_set_manager(struct omap_overlay *ovl,
432 struct omap_overlay_manager *mgr)
438 DSSERR("overlay '%s' already has a manager '%s'\n",
439 ovl->name, ovl->manager->name);
443 if (ovl->info.enabled) {
444 DSSERR("overlay has to be disabled to change the manager\n");
450 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
451 /* XXX: on manual update display, in auto update mode, a bug happens
452 * here. When an overlay is first enabled on LCD, then it's disabled,
453 * and the manager is changed to TV, we sometimes get SYNC_LOST_DIGIT
454 * errors. Waiting before changing the channel_out fixes it. I'm
455 * guessing that the overlay is still somehow being used for the LCD,
456 * but I don't understand how or why. */
458 dispc_set_channel_out(ovl->id, mgr->id);
459 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
464 static int omap_dss_unset_manager(struct omap_overlay *ovl)
469 DSSERR("failed to detach overlay: manager not set\n");
473 if (ovl->info.enabled) {
474 DSSERR("overlay has to be disabled to unset the manager\n");
478 r = ovl->wait_for_go(ovl);
487 int omap_dss_get_num_overlays(void)
491 EXPORT_SYMBOL(omap_dss_get_num_overlays);
493 struct omap_overlay *omap_dss_get_overlay(int num)
496 struct omap_overlay *ovl;
498 list_for_each_entry(ovl, &overlay_list, list) {
505 EXPORT_SYMBOL(omap_dss_get_overlay);
507 static void omap_dss_add_overlay(struct omap_overlay *overlay)
510 list_add_tail(&overlay->list, &overlay_list);
513 static struct omap_overlay *dispc_overlays[3];
515 void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
517 mgr->num_overlays = 3;
518 mgr->overlays = dispc_overlays;
522 static struct omap_overlay *l4_overlays[1];
523 void dss_overlay_setup_l4_manager(struct omap_overlay_manager *mgr)
525 mgr->num_overlays = 1;
526 mgr->overlays = l4_overlays;
530 void dss_init_overlays(struct platform_device *pdev)
534 INIT_LIST_HEAD(&overlay_list);
538 for (i = 0; i < 3; ++i) {
539 struct omap_overlay *ovl;
540 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
547 ovl->id = OMAP_DSS_GFX;
548 ovl->supported_modes = cpu_is_omap34xx() ?
549 OMAP_DSS_COLOR_GFX_OMAP3 :
550 OMAP_DSS_COLOR_GFX_OMAP2;
551 ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
552 ovl->info.global_alpha = 255;
556 ovl->id = OMAP_DSS_VIDEO1;
557 ovl->supported_modes = cpu_is_omap34xx() ?
558 OMAP_DSS_COLOR_VID1_OMAP3 :
559 OMAP_DSS_COLOR_VID_OMAP2;
560 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
561 OMAP_DSS_OVL_CAP_DISPC;
562 ovl->info.global_alpha = 255;
566 ovl->id = OMAP_DSS_VIDEO2;
567 ovl->supported_modes = cpu_is_omap34xx() ?
568 OMAP_DSS_COLOR_VID2_OMAP3 :
569 OMAP_DSS_COLOR_VID_OMAP2;
570 ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
571 OMAP_DSS_OVL_CAP_DISPC;
572 ovl->info.global_alpha = 255;
576 ovl->set_manager = &omap_dss_set_manager;
577 ovl->unset_manager = &omap_dss_unset_manager;
578 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
579 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
580 ovl->wait_for_go = &dss_ovl_wait_for_go;
582 omap_dss_add_overlay(ovl);
584 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
585 &pdev->dev.kobj, "overlay%d", i);
588 DSSERR("failed to create sysfs file\n");
592 dispc_overlays[i] = ovl;
597 struct omap_overlay *ovl;
598 ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
603 ovl->supported_modes = OMAP_DSS_COLOR_RGB24U;
605 ovl->set_manager = &omap_dss_set_manager;
606 ovl->unset_manager = &omap_dss_unset_manager;
607 ovl->set_overlay_info = &dss_ovl_set_overlay_info;
608 ovl->get_overlay_info = &dss_ovl_get_overlay_info;
610 omap_dss_add_overlay(ovl);
612 r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
613 &pdev->dev.kobj, "overlayl4");
616 DSSERR("failed to create sysfs file\n");
618 l4_overlays[0] = ovl;
623 /* connect overlays to the new device, if not already connected. if force
624 * selected, connect always. */
625 void dss_recheck_connections(struct omap_dss_device *dssdev, bool force)
628 struct omap_overlay_manager *lcd_mgr;
629 struct omap_overlay_manager *tv_mgr;
630 struct omap_overlay_manager *mgr = NULL;
632 lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
633 tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
635 if (dssdev->type != OMAP_DISPLAY_TYPE_VENC) {
636 if (!lcd_mgr->device || force) {
638 lcd_mgr->unset_device(lcd_mgr);
639 lcd_mgr->set_device(lcd_mgr, dssdev);
644 if (dssdev->type == OMAP_DISPLAY_TYPE_VENC) {
645 if (!tv_mgr->device || force) {
647 tv_mgr->unset_device(tv_mgr);
648 tv_mgr->set_device(tv_mgr, dssdev);
654 for (i = 0; i < 3; i++) {
655 struct omap_overlay *ovl;
656 ovl = omap_dss_get_overlay(i);
657 if (!ovl->manager || force) {
659 omap_dss_unset_manager(ovl);
660 omap_dss_set_manager(ovl, mgr);
666 void dss_uninit_overlays(struct platform_device *pdev)
668 struct omap_overlay *ovl;
670 while (!list_empty(&overlay_list)) {
671 ovl = list_first_entry(&overlay_list,
672 struct omap_overlay, list);
673 list_del(&ovl->list);
674 kobject_del(&ovl->kobj);
675 kobject_put(&ovl->kobj);