--- /dev/null
+/*
+ * linux/drivers/video/omap2/dss/overlay.c
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ *
+ * Some code and ideas taken from drivers/video/omap/ driver
+ * by Imre Deak.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define DSS_SUBSYS_NAME "OVERLAY"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/sysfs.h>
+#include <linux/kobject.h>
+#include <linux/platform_device.h>
+
+#include <mach/display.h>
+
+#include "dss.h"
+
+static int num_overlays;
+static struct list_head overlay_list;
+
+static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
+}
+
+static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ ovl->manager ? ovl->manager->name : "<none>");
+}
+
+static ssize_t overlay_manager_store(struct omap_overlay *ovl, const char *buf, size_t size)
+{
+ int i, r;
+ struct omap_overlay_manager *mgr = NULL;
+ int len = size;
+
+ if (buf[size-1] == '\n')
+ --len;
+
+ if (len > 0) {
+ for (i = 0; i < omap_dss_get_num_overlay_managers(); ++i) {
+ mgr = omap_dss_get_overlay_manager(i);
+
+ if (strncmp(buf, mgr->name, len) == 0)
+ break;
+
+ mgr = NULL;
+ }
+ }
+
+ if (len > 0 && mgr == NULL)
+ return -EINVAL;
+
+ if (mgr)
+ DSSDBG("manager %s found\n", mgr->name);
+
+ if (mgr != ovl->manager) {
+ /* detach old manager */
+ if (ovl->manager) {
+ r = ovl->unset_manager(ovl);
+ if (r) {
+ DSSERR("detach failed\n");
+ return r;
+ }
+ }
+
+ if (mgr) {
+ r = ovl->set_manager(ovl, mgr);
+ if (r) {
+ DSSERR("Failed to attach overlay\n");
+ return r;
+ }
+ }
+ }
+
+ if (ovl->manager) {
+ omap_dss_lock();
+ r = ovl->manager->apply(ovl->manager);
+ omap_dss_unlock();
+ if (r)
+ return r;
+ }
+
+ return size;
+}
+
+static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n",
+ ovl->info.width, ovl->info.height);
+}
+
+static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.screen_width);
+}
+
+static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n",
+ ovl->info.pos_x, ovl->info.pos_y);
+}
+
+static ssize_t overlay_position_store(struct omap_overlay *ovl,
+ const char *buf, size_t size)
+{
+ int r;
+ char *last;
+ struct omap_overlay_info info;
+
+ ovl->get_overlay_info(ovl, &info);
+
+ info.pos_x = simple_strtoul(buf, &last, 10);
+ ++last;
+ if (last - buf >= size)
+ return -EINVAL;
+
+ info.pos_y = simple_strtoul(last, &last, 10);
+
+ if ((r = ovl->set_overlay_info(ovl, &info)))
+ return r;
+
+ if (ovl->manager) {
+ omap_dss_lock();
+ r = ovl->manager->apply(ovl->manager);
+ omap_dss_unlock();
+ if (r)
+ return r;
+ }
+
+ return size;
+}
+
+static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n",
+ ovl->info.out_width, ovl->info.out_height);
+}
+
+static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
+ const char *buf, size_t size)
+{
+ int r;
+ char *last;
+ struct omap_overlay_info info;
+
+ ovl->get_overlay_info(ovl, &info);
+
+ info.out_width = simple_strtoul(buf, &last, 10);
+ ++last;
+ if (last - buf >= size)
+ return -EINVAL;
+
+ info.out_height = simple_strtoul(last, &last, 10);
+
+ if ((r = ovl->set_overlay_info(ovl, &info)))
+ return r;
+
+ if (ovl->manager) {
+ omap_dss_lock();
+ r = ovl->manager->apply(ovl->manager);
+ omap_dss_unlock();
+ if (r)
+ return r;
+ }
+
+ return size;
+}
+
+static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", ovl->info.enabled);
+}
+
+static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf, size_t size)
+{
+ int r;
+ struct omap_overlay_info info;
+
+ ovl->get_overlay_info(ovl, &info);
+
+ info.enabled = simple_strtoul(buf, NULL, 10);
+
+ if ((r = ovl->set_overlay_info(ovl, &info)))
+ return r;
+
+ if (ovl->manager) {
+ omap_dss_lock();
+ r = ovl->manager->apply(ovl->manager);
+ omap_dss_unlock();
+
+ if (r)
+ return r;
+ }
+
+ return size;
+}
+
+static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ ovl->info.global_alpha);
+}
+
+static ssize_t overlay_global_alpha_store(struct omap_overlay *ovl,
+ const char *buf, size_t size)
+{
+ int r;
+ struct omap_overlay_info info;
+
+ ovl->get_overlay_info(ovl, &info);
+
+ /* Video1 plane does not support global alpha
+ * to always make it 255 completely opaque
+ */
+ if (ovl->id == OMAP_DSS_VIDEO1)
+ info.global_alpha = 255;
+ else
+ info.global_alpha = simple_strtoul(buf, NULL, 10);
+
+ if ((r = ovl->set_overlay_info(ovl, &info)))
+ return r;
+
+ if (ovl->manager) {
+ omap_dss_lock();
+ r = ovl->manager->apply(ovl->manager);
+ omap_dss_unlock();
+ if (r)
+ return r;
+ }
+
+ return size;
+}
+
+struct overlay_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct omap_overlay *, char *);
+ ssize_t (*store)(struct omap_overlay *, const char *, size_t);
+};
+
+#define OVERLAY_ATTR(_name, _mode, _show, _store) \
+ struct overlay_attribute overlay_attr_##_name = \
+ __ATTR(_name, _mode, _show, _store)
+
+static OVERLAY_ATTR(name, S_IRUGO, overlay_name_show, NULL);
+static OVERLAY_ATTR(manager, S_IRUGO|S_IWUSR,
+ overlay_manager_show, overlay_manager_store);
+static OVERLAY_ATTR(input_size, S_IRUGO, overlay_input_size_show, NULL);
+static OVERLAY_ATTR(screen_width, S_IRUGO, overlay_screen_width_show, NULL);
+static OVERLAY_ATTR(position, S_IRUGO|S_IWUSR,
+ overlay_position_show, overlay_position_store);
+static OVERLAY_ATTR(output_size, S_IRUGO|S_IWUSR,
+ overlay_output_size_show, overlay_output_size_store);
+static OVERLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
+ overlay_enabled_show, overlay_enabled_store);
+static OVERLAY_ATTR(global_alpha, S_IRUGO|S_IWUSR,
+ overlay_global_alpha_show, overlay_global_alpha_store);
+
+static struct attribute *overlay_sysfs_attrs[] = {
+ &overlay_attr_name.attr,
+ &overlay_attr_manager.attr,
+ &overlay_attr_input_size.attr,
+ &overlay_attr_screen_width.attr,
+ &overlay_attr_position.attr,
+ &overlay_attr_output_size.attr,
+ &overlay_attr_enabled.attr,
+ &overlay_attr_global_alpha.attr,
+ NULL
+};
+
+static ssize_t overlay_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+ struct omap_overlay *overlay;
+ struct overlay_attribute *overlay_attr;
+
+ overlay = container_of(kobj, struct omap_overlay, kobj);
+ overlay_attr = container_of(attr, struct overlay_attribute, attr);
+
+ if (!overlay_attr->show)
+ return -ENOENT;
+
+ return overlay_attr->show(overlay, buf);
+}
+
+static ssize_t overlay_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t size)
+{
+ struct omap_overlay *overlay;
+ struct overlay_attribute *overlay_attr;
+
+ overlay = container_of(kobj, struct omap_overlay, kobj);
+ overlay_attr = container_of(attr, struct overlay_attribute, attr);
+
+ if (!overlay_attr->store)
+ return -ENOENT;
+
+ return overlay_attr->store(overlay, buf, size);
+}
+
+static struct sysfs_ops overlay_sysfs_ops = {
+ .show = overlay_attr_show,
+ .store = overlay_attr_store,
+};
+
+static struct kobj_type overlay_ktype = {
+ .sysfs_ops = &overlay_sysfs_ops,
+ .default_attrs = overlay_sysfs_attrs,
+};
+
+/* Check if overlay parameters are compatible with display */
+int dss_check_overlay(struct omap_overlay *ovl, struct omap_display *display)
+{
+ struct omap_overlay_info *info;
+ u16 outw, outh;
+ u16 dw, dh;
+
+ if (!display)
+ return 0;
+
+ if (!ovl->info.enabled)
+ return 0;
+
+ info = &ovl->info;
+
+ if (info->paddr == 0) {
+ DSSDBG("check_overlay failed: paddr 0\n");
+ return -EINVAL;
+ }
+
+ display->get_resolution(display, &dw, &dh);
+
+ DSSDBG("check_overlay %d: (%d,%d %dx%d -> %dx%d) disp (%dx%d)\n",
+ ovl->id,
+ info->pos_x, info->pos_y,
+ info->width, info->height,
+ info->out_width, info->out_height,
+ dw, dh);
+
+ if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
+ outw = info->width;
+ outh = info->height;
+ } else {
+ if (info->out_width == 0)
+ outw = info->width;
+ else
+ outw = info->out_width;
+
+ if (info->out_height == 0)
+ outh = info->height;
+ else
+ outh = info->out_height;
+ }
+
+ if (dw < info->pos_x + outw) {
+ DSSDBG("check_overlay failed 1: %d < %d + %d\n",
+ dw, info->pos_x, outw);
+ return -EINVAL;
+ }
+
+ if (dh < info->pos_y + outh) {
+ DSSDBG("check_overlay failed 2: %d < %d + %d\n",
+ dh, info->pos_y, outh);
+ return -EINVAL;
+ }
+
+ if ((ovl->supported_modes & info->color_mode) == 0) {
+ DSSERR("overlay doesn't support mode %d\n", info->color_mode);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int dss_ovl_set_overlay_info(struct omap_overlay *ovl,
+ struct omap_overlay_info *info)
+{
+ int r;
+ struct omap_overlay_info old_info;
+
+ old_info = ovl->info;
+ ovl->info = *info;
+
+ if (ovl->manager) {
+ r = dss_check_overlay(ovl, ovl->manager->display);
+ if (r) {
+ ovl->info = old_info;
+ return r;
+ }
+ }
+
+ return 0;
+}
+
+static void dss_ovl_get_overlay_info(struct omap_overlay *ovl,
+ struct omap_overlay_info *info)
+{
+ *info = ovl->info;
+}
+
+static int omap_dss_set_manager(struct omap_overlay *ovl,
+ struct omap_overlay_manager *mgr)
+{
+ int r;
+
+ if (ovl->manager) {
+ DSSERR("overlay '%s' already has a manager '%s'\n",
+ ovl->name, ovl->manager->name);
+ }
+
+ r = dss_check_overlay(ovl, mgr->display);
+ if (r)
+ return r;
+
+ ovl->manager = mgr;
+
+ return 0;
+}
+
+static int omap_dss_unset_manager(struct omap_overlay *ovl)
+{
+ if (!ovl->manager) {
+ DSSERR("failed to detach overlay: manager not set\n");
+ return -EINVAL;
+ }
+
+ ovl->manager = NULL;
+
+ return 0;
+}
+
+int omap_dss_get_num_overlays(void)
+{
+ return num_overlays;
+}
+EXPORT_SYMBOL(omap_dss_get_num_overlays);
+
+struct omap_overlay *omap_dss_get_overlay(int num)
+{
+ int i = 0;
+ struct omap_overlay *ovl;
+
+ list_for_each_entry(ovl, &overlay_list, list) {
+ if (i++ == num)
+ return ovl;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(omap_dss_get_overlay);
+
+static void omap_dss_add_overlay(struct omap_overlay *overlay)
+{
+ ++num_overlays;
+ list_add_tail(&overlay->list, &overlay_list);
+}
+
+static struct omap_overlay *dispc_overlays[3];
+
+void dss_overlay_setup_dispc_manager(struct omap_overlay_manager *mgr)
+{
+ mgr->num_overlays = 3;
+ mgr->overlays = dispc_overlays;
+}
+
+void dss_init_overlays(struct platform_device *pdev)
+{
+ int i, r;
+ struct omap_overlay_manager *lcd_mgr;
+ struct omap_overlay_manager *tv_mgr;
+ struct omap_dss_board_info *pdata = pdev->dev.platform_data;
+
+ INIT_LIST_HEAD(&overlay_list);
+
+ num_overlays = 0;
+
+ for (i = 0; i < 3; ++i) {
+ struct omap_overlay *ovl;
+ ovl = kzalloc(sizeof(*ovl), GFP_KERNEL);
+
+ BUG_ON(ovl == NULL);
+
+ switch (i) {
+ case 0:
+ ovl->name = "gfx";
+ ovl->id = OMAP_DSS_GFX;
+ ovl->supported_modes = cpu_is_omap34xx() ?
+ OMAP_DSS_COLOR_GFX_OMAP3 :
+ OMAP_DSS_COLOR_GFX_OMAP2;
+ ovl->caps = OMAP_DSS_OVL_CAP_DISPC;
+ ovl->info.global_alpha = 255;
+ ovl->info.fifo_threshold_low =
+ pdata->fifo_thresholds[OMAP_DSS_GFX].low;
+ ovl->info.fifo_threshold_high =
+ pdata->fifo_thresholds[OMAP_DSS_GFX].high;
+ break;
+ case 1:
+ ovl->name = "vid1";
+ ovl->id = OMAP_DSS_VIDEO1;
+ ovl->supported_modes = cpu_is_omap34xx() ?
+ OMAP_DSS_COLOR_VID1_OMAP3 :
+ OMAP_DSS_COLOR_VID_OMAP2;
+ ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
+ OMAP_DSS_OVL_CAP_DISPC;
+ ovl->info.global_alpha = 255;
+ ovl->info.fifo_threshold_low =
+ pdata->fifo_thresholds[OMAP_DSS_VIDEO1].low;
+ ovl->info.fifo_threshold_high =
+ pdata->fifo_thresholds[OMAP_DSS_VIDEO1].high;
+ break;
+ case 2:
+ ovl->name = "vid2";
+ ovl->id = OMAP_DSS_VIDEO2;
+ ovl->supported_modes = cpu_is_omap34xx() ?
+ OMAP_DSS_COLOR_VID2_OMAP3 :
+ OMAP_DSS_COLOR_VID_OMAP2;
+ ovl->caps = OMAP_DSS_OVL_CAP_SCALE |
+ OMAP_DSS_OVL_CAP_DISPC;
+ ovl->info.global_alpha = 255;
+ ovl->info.fifo_threshold_low =
+ pdata->fifo_thresholds[OMAP_DSS_VIDEO2].low;
+ ovl->info.fifo_threshold_high =
+ pdata->fifo_thresholds[OMAP_DSS_VIDEO2].high;
+ break;
+ }
+
+ ovl->set_manager = &omap_dss_set_manager;
+ ovl->unset_manager = &omap_dss_unset_manager;
+ ovl->set_overlay_info = &dss_ovl_set_overlay_info;
+ ovl->get_overlay_info = &dss_ovl_get_overlay_info;
+
+ omap_dss_add_overlay(ovl);
+
+ r = kobject_init_and_add(&ovl->kobj, &overlay_ktype,
+ &pdev->dev.kobj, "overlay%d", i);
+
+ if (r) {
+ DSSERR("failed to create sysfs file\n");
+ continue;
+ }
+
+ dispc_overlays[i] = ovl;
+ }
+
+ lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
+ tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
+
+#ifdef L4_EXAMPLE
+ /* setup L4 overlay as an example */
+ {
+ static struct omap_overlay ovl = {
+ .name = "l4-ovl",
+ .supported_modes = OMAP_DSS_COLOR_RGB24U,
+ .set_manager = &omap_dss_set_manager,
+ .unset_manager = &omap_dss_unset_manager,
+ .setup_input = &omap_dss_setup_overlay_input,
+ .setup_output = &omap_dss_setup_overlay_output,
+ .enable = &omap_dss_enable_overlay,
+ };
+
+ static struct omap_overlay_manager mgr = {
+ .name = "l4",
+ .num_overlays = 1,
+ .overlays = &ovl,
+ .set_display = &omap_dss_set_display,
+ .unset_display = &omap_dss_unset_display,
+ .apply = &ovl_mgr_apply_l4,
+ .supported_displays =
+ OMAP_DISPLAY_TYPE_DBI | OMAP_DISPLAY_TYPE_DSI,
+ };
+
+ omap_dss_add_overlay(&ovl);
+ omap_dss_add_overlay_manager(&mgr);
+ omap_dss_set_manager(&ovl, &mgr);
+ }
+#endif
+}
+
+/* connect overlays to the new device, if not already connected. if force
+ * selected, connect always. */
+void dss_recheck_connections(struct omap_display *display, bool force)
+{
+ int i;
+ struct omap_overlay_manager *lcd_mgr;
+ struct omap_overlay_manager *tv_mgr;
+ struct omap_overlay_manager *mgr = NULL;
+
+ lcd_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_LCD);
+ tv_mgr = omap_dss_get_overlay_manager(OMAP_DSS_OVL_MGR_TV);
+
+ if (display->type != OMAP_DISPLAY_TYPE_VENC) {
+ if (!lcd_mgr->display || force) {
+ if (lcd_mgr->display)
+ lcd_mgr->unset_display(lcd_mgr);
+ lcd_mgr->set_display(lcd_mgr, display);
+ mgr = lcd_mgr;
+ }
+ }
+
+ if (display->type == OMAP_DISPLAY_TYPE_VENC) {
+ if (!tv_mgr->display || force) {
+ if (tv_mgr->display)
+ tv_mgr->unset_display(tv_mgr);
+ tv_mgr->set_display(tv_mgr, display);
+ mgr = tv_mgr;
+ }
+ }
+
+ if (mgr) {
+ for (i = 0; i < 3; i++) {
+ struct omap_overlay *ovl;
+ ovl = omap_dss_get_overlay(i);
+ if (!ovl->manager || force) {
+ if (ovl->manager)
+ omap_dss_unset_manager(ovl);
+ omap_dss_set_manager(ovl, mgr);
+ }
+ }
+ }
+}
+
+void dss_uninit_overlays(struct platform_device *pdev)
+{
+ struct omap_overlay *ovl;
+
+ while (!list_empty(&overlay_list)) {
+ ovl = list_first_entry(&overlay_list,
+ struct omap_overlay, list);
+ list_del(&ovl->list);
+ kobject_del(&ovl->kobj);
+ kobject_put(&ovl->kobj);
+ kfree(ovl);
+ }
+
+ num_overlays = 0;
+}
+
projects / h-e-n / blobdiff