text: /*
   * linux/drivers/video/omap2/dss/manager.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 "MANAGER"
  
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/jiffies.h>
  
  #include <video/omapdss.h>
  
  #include "dss.h"
  #include "dss_features.h"
  
  static int num_managers;
  static struct omap_overlay_manager *managers;
  
  static ssize_t manager_name_show(struct omap_overlay_manager *mgr, char *buf)
  {
  	return snprintf(buf, PAGE_SIZE, "%s\n", mgr->name);
  }
  
  static ssize_t manager_display_show(struct omap_overlay_manager *mgr, char *buf)
  {
  	return snprintf(buf, PAGE_SIZE, "%s\n",
  			mgr->device ? mgr->device->name : "<none>");
  }
  
  static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
  		const char *buf, size_t size)
  {
  	int r = 0;
  	size_t len = size;
  	struct omap_dss_device *dssdev = NULL;
  
  	int match(struct omap_dss_device *dssdev, void *data)
  	{
  		const char *str = data;
  		return sysfs_streq(dssdev->name, str);
  	}
  
  	if (buf[size-1] == '\n')
  		--len;
  
  	if (len > 0)
  		dssdev = omap_dss_find_device((void *)buf, match);
  
  	if (len > 0 && dssdev == NULL)
  		return -EINVAL;
  
  	if (dssdev)
  		DSSDBG("display %s found\n", dssdev->name);
  
  	if (mgr->device) {
  		r = mgr->unset_device(mgr);
  		if (r) {
  			DSSERR("failed to unset display\n");
  			goto put_device;
  		}
  	}
  
  	if (dssdev) {
  		r = mgr->set_device(mgr, dssdev);
  		if (r) {
  			DSSERR("failed to set manager\n");
  			goto put_device;
  		}
  
  		r = mgr->apply(mgr);
  		if (r) {
  			DSSERR("failed to apply dispc config\n");
  			goto put_device;
  		}
  	}
  
  put_device:
  	if (dssdev)
  		omap_dss_put_device(dssdev);
  
  	return r ? r : size;
  }
  
  static ssize_t manager_default_color_show(struct omap_overlay_manager *mgr,
  					  char *buf)
  {
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	return snprintf(buf, PAGE_SIZE, "%#x\n", info.default_color);
  }
  
  static ssize_t manager_default_color_store(struct omap_overlay_manager *mgr,
  					   const char *buf, size_t size)
  {
  	struct omap_overlay_manager_info info;
  	u32 color;
  	int r;
  
  	r = kstrtouint(buf, 0, &color);
  	if (r)
  		return r;
  
  	mgr->get_manager_info(mgr, &info);
  
  	info.default_color = color;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  static const char *trans_key_type_str[] = {
  	"gfx-destination",
  	"video-source",
  };
  
  static ssize_t manager_trans_key_type_show(struct omap_overlay_manager *mgr,
  					   char *buf)
  {
  	enum omap_dss_trans_key_type key_type;
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	key_type = info.trans_key_type;
  	BUG_ON(key_type >= ARRAY_SIZE(trans_key_type_str));
  
  	return snprintf(buf, PAGE_SIZE, "%s\n", trans_key_type_str[key_type]);
  }
  
  static ssize_t manager_trans_key_type_store(struct omap_overlay_manager *mgr,
  					    const char *buf, size_t size)
  {
  	enum omap_dss_trans_key_type key_type;
  	struct omap_overlay_manager_info info;
  	int r;
  
  	for (key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
  			key_type < ARRAY_SIZE(trans_key_type_str); key_type++) {
  		if (sysfs_streq(buf, trans_key_type_str[key_type]))
  			break;
  	}
  
  	if (key_type == ARRAY_SIZE(trans_key_type_str))
  		return -EINVAL;
  
  	mgr->get_manager_info(mgr, &info);
  
  	info.trans_key_type = key_type;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  static ssize_t manager_trans_key_value_show(struct omap_overlay_manager *mgr,
  					    char *buf)
  {
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	return snprintf(buf, PAGE_SIZE, "%#x\n", info.trans_key);
  }
  
  static ssize_t manager_trans_key_value_store(struct omap_overlay_manager *mgr,
  					     const char *buf, size_t size)
  {
  	struct omap_overlay_manager_info info;
  	u32 key_value;
  	int r;
  
  	r = kstrtouint(buf, 0, &key_value);
  	if (r)
  		return r;
  
  	mgr->get_manager_info(mgr, &info);
  
  	info.trans_key = key_value;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  static ssize_t manager_trans_key_enabled_show(struct omap_overlay_manager *mgr,
  					      char *buf)
  {
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	return snprintf(buf, PAGE_SIZE, "%d\n", info.trans_enabled);
  }
  
  static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
  					       const char *buf, size_t size)
  {
  	struct omap_overlay_manager_info info;
  	bool enable;
  	int r;
  
  	r = strtobool(buf, &enable);
  	if (r)
  		return r;
  
  	mgr->get_manager_info(mgr, &info);
  
  	info.trans_enabled = enable;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  static ssize_t manager_alpha_blending_enabled_show(
  		struct omap_overlay_manager *mgr, char *buf)
  {
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	WARN_ON(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER));
  
  	return snprintf(buf, PAGE_SIZE, "%d\n",
  		info.partial_alpha_enabled);
  }
  
  static ssize_t manager_alpha_blending_enabled_store(
  		struct omap_overlay_manager *mgr,
  		const char *buf, size_t size)
  {
  	struct omap_overlay_manager_info info;
  	bool enable;
  	int r;
  
  	WARN_ON(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER));
  
  	r = strtobool(buf, &enable);
  	if (r)
  		return r;
  
  	mgr->get_manager_info(mgr, &info);
  
  	info.partial_alpha_enabled = enable;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  static ssize_t manager_cpr_enable_show(struct omap_overlay_manager *mgr,
  		char *buf)
  {
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	return snprintf(buf, PAGE_SIZE, "%d\n", info.cpr_enable);
  }
  
  static ssize_t manager_cpr_enable_store(struct omap_overlay_manager *mgr,
  		const char *buf, size_t size)
  {
  	struct omap_overlay_manager_info info;
  	int r;
  	bool enable;
  
  	if (!dss_has_feature(FEAT_CPR))
  		return -ENODEV;
  
  	r = strtobool(buf, &enable);
  	if (r)
  		return r;
  
  	mgr->get_manager_info(mgr, &info);
  
  	if (info.cpr_enable == enable)
  		return size;
  
  	info.cpr_enable = enable;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  static ssize_t manager_cpr_coef_show(struct omap_overlay_manager *mgr,
  		char *buf)
  {
  	struct omap_overlay_manager_info info;
  
  	mgr->get_manager_info(mgr, &info);
  
  	return snprintf(buf, PAGE_SIZE,
  			"%d %d %d %d %d %d %d %d %d\n",
  			info.cpr_coefs.rr,
  			info.cpr_coefs.rg,
  			info.cpr_coefs.rb,
  			info.cpr_coefs.gr,
  			info.cpr_coefs.gg,
  			info.cpr_coefs.gb,
  			info.cpr_coefs.br,
  			info.cpr_coefs.bg,
  			info.cpr_coefs.bb);
  }
  
  static ssize_t manager_cpr_coef_store(struct omap_overlay_manager *mgr,
  		const char *buf, size_t size)
  {
  	struct omap_overlay_manager_info info;
  	struct omap_dss_cpr_coefs coefs;
  	int r, i;
  	s16 *arr;
  
  	if (!dss_has_feature(FEAT_CPR))
  		return -ENODEV;
  
  	if (sscanf(buf, "%hd %hd %hd %hd %hd %hd %hd %hd %hd",
  				&coefs.rr, &coefs.rg, &coefs.rb,
  				&coefs.gr, &coefs.gg, &coefs.gb,
  				&coefs.br, &coefs.bg, &coefs.bb) != 9)
  		return -EINVAL;
  
  	arr = (s16[]){ coefs.rr, coefs.rg, coefs.rb,
  		coefs.gr, coefs.gg, coefs.gb,
  		coefs.br, coefs.bg, coefs.bb };
  
  	for (i = 0; i < 9; ++i) {
  		if (arr[i] < -512 || arr[i] > 511)
  			return -EINVAL;
  	}
  
  	mgr->get_manager_info(mgr, &info);
  
  	info.cpr_coefs = coefs;
  
  	r = mgr->set_manager_info(mgr, &info);
  	if (r)
  		return r;
  
  	r = mgr->apply(mgr);
  	if (r)
  		return r;
  
  	return size;
  }
  
  struct manager_attribute {
  	struct attribute attr;
  	ssize_t (*show)(struct omap_overlay_manager *, char *);
  	ssize_t	(*store)(struct omap_overlay_manager *, const char *, size_t);
  };
  
  #define MANAGER_ATTR(_name, _mode, _show, _store) \
  	struct manager_attribute manager_attr_##_name = \
  	__ATTR(_name, _mode, _show, _store)
  
  static MANAGER_ATTR(name, S_IRUGO, manager_name_show, NULL);
  static MANAGER_ATTR(display, S_IRUGO|S_IWUSR,
  		manager_display_show, manager_display_store);
  static MANAGER_ATTR(default_color, S_IRUGO|S_IWUSR,
  		manager_default_color_show, manager_default_color_store);
  static MANAGER_ATTR(trans_key_type, S_IRUGO|S_IWUSR,
  		manager_trans_key_type_show, manager_trans_key_type_store);
  static MANAGER_ATTR(trans_key_value, S_IRUGO|S_IWUSR,
  		manager_trans_key_value_show, manager_trans_key_value_store);
  static MANAGER_ATTR(trans_key_enabled, S_IRUGO|S_IWUSR,
  		manager_trans_key_enabled_show,
  		manager_trans_key_enabled_store);
  static MANAGER_ATTR(alpha_blending_enabled, S_IRUGO|S_IWUSR,
  		manager_alpha_blending_enabled_show,
  		manager_alpha_blending_enabled_store);
  static MANAGER_ATTR(cpr_enable, S_IRUGO|S_IWUSR,
  		manager_cpr_enable_show,
  		manager_cpr_enable_store);
  static MANAGER_ATTR(cpr_coef, S_IRUGO|S_IWUSR,
  		manager_cpr_coef_show,
  		manager_cpr_coef_store);
  
  
  static struct attribute *manager_sysfs_attrs[] = {
  	&manager_attr_name.attr,
  	&manager_attr_display.attr,
  	&manager_attr_default_color.attr,
  	&manager_attr_trans_key_type.attr,
  	&manager_attr_trans_key_value.attr,
  	&manager_attr_trans_key_enabled.attr,
  	&manager_attr_alpha_blending_enabled.attr,
  	&manager_attr_cpr_enable.attr,
  	&manager_attr_cpr_coef.attr,
  	NULL
  };
  
  static ssize_t manager_attr_show(struct kobject *kobj, struct attribute *attr,
  		char *buf)
  {
  	struct omap_overlay_manager *manager;
  	struct manager_attribute *manager_attr;
  
  	manager = container_of(kobj, struct omap_overlay_manager, kobj);
  	manager_attr = container_of(attr, struct manager_attribute, attr);
  
  	if (!manager_attr->show)
  		return -ENOENT;
  
  	return manager_attr->show(manager, buf);
  }
  
  static ssize_t manager_attr_store(struct kobject *kobj, struct attribute *attr,
  		const char *buf, size_t size)
  {
  	struct omap_overlay_manager *manager;
  	struct manager_attribute *manager_attr;
  
  	manager = container_of(kobj, struct omap_overlay_manager, kobj);
  	manager_attr = container_of(attr, struct manager_attribute, attr);
  
  	if (!manager_attr->store)
  		return -ENOENT;
  
  	return manager_attr->store(manager, buf, size);
  }
  
  static const struct sysfs_ops manager_sysfs_ops = {
  	.show = manager_attr_show,
  	.store = manager_attr_store,
  };
  
  static struct kobj_type manager_ktype = {
  	.sysfs_ops = &manager_sysfs_ops,
  	.default_attrs = manager_sysfs_attrs,
  };
  
  static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
  {
  	unsigned long timeout = msecs_to_jiffies(500);
  	u32 irq;
  
  	if (mgr->device->type == OMAP_DISPLAY_TYPE_VENC) {
  		irq = DISPC_IRQ_EVSYNC_ODD;
  	} else if (mgr->device->type == OMAP_DISPLAY_TYPE_HDMI) {
  		irq = DISPC_IRQ_EVSYNC_EVEN;
  	} else {
  		if (mgr->id == OMAP_DSS_CHANNEL_LCD)
  			irq = DISPC_IRQ_VSYNC;
  		else
  			irq = DISPC_IRQ_VSYNC2;
  	}
  	return omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
  }
  
  int dss_init_overlay_managers(struct platform_device *pdev)
  {
  	int i, r;
  
  	num_managers = dss_feat_get_num_mgrs();
  
  	managers = kzalloc(sizeof(struct omap_overlay_manager) * num_managers,
  			GFP_KERNEL);
  
  	BUG_ON(managers == NULL);
  
  	for (i = 0; i < num_managers; ++i) {
  		struct omap_overlay_manager *mgr = &managers[i];
  
  		switch (i) {
  		case 0:
  			mgr->name = "lcd";
  			mgr->id = OMAP_DSS_CHANNEL_LCD;
  			break;
  		case 1:
  			mgr->name = "tv";
  			mgr->id = OMAP_DSS_CHANNEL_DIGIT;
  			break;
  		case 2:
  			mgr->name = "lcd2";
  			mgr->id = OMAP_DSS_CHANNEL_LCD2;
  			break;
  		}
  
  		mgr->set_device = &dss_mgr_set_device;
  		mgr->unset_device = &dss_mgr_unset_device;
  		mgr->apply = &omap_dss_mgr_apply;
  		mgr->set_manager_info = &dss_mgr_set_info;
  		mgr->get_manager_info = &dss_mgr_get_info;
  		mgr->wait_for_go = &dss_mgr_wait_for_go;
  		mgr->wait_for_vsync = &dss_mgr_wait_for_vsync;
  
  		mgr->caps = 0;
  		mgr->supported_displays =
  			dss_feat_get_supported_displays(mgr->id);
  
  		INIT_LIST_HEAD(&mgr->overlays);
  
  		r = kobject_init_and_add(&mgr->kobj, &manager_ktype,
  				&pdev->dev.kobj, "manager%d", i);
  
  		if (r)
  			DSSERR("failed to create sysfs file\n");
  	}
  
  	return 0;
  }
  
  void dss_uninit_overlay_managers(struct platform_device *pdev)
  {
  	int i;
  
  	for (i = 0; i < num_managers; ++i) {
  		struct omap_overlay_manager *mgr = &managers[i];
  
  		kobject_del(&mgr->kobj);
  		kobject_put(&mgr->kobj);
  	}
  
  	kfree(managers);
  	managers = NULL;
  	num_managers = 0;
  }
  
  int omap_dss_get_num_overlay_managers(void)
  {
  	return num_managers;
  }
  EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
  
  struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
  {
  	if (num >= num_managers)
  		return NULL;
  
  	return &managers[num];
  }
  EXPORT_SYMBOL(omap_dss_get_overlay_manager);
  
  int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
  		const struct omap_overlay_manager_info *info)
  {
  	if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
  		/*
  		 * OMAP3 supports only graphics source transparency color key
  		 * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
  		 * Alpha Mode.
  		 */
  		if (info->partial_alpha_enabled && info->trans_enabled
  			&& info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
  			DSSERR("check_manager: illegal transparency key\n");
  			return -EINVAL;
  		}
  	}
  
  	return 0;
  }
  
  static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
  		struct omap_overlay_info **overlay_infos)
  {
  	struct omap_overlay *ovl1, *ovl2;
  	struct omap_overlay_info *info1, *info2;
  
  	list_for_each_entry(ovl1, &mgr->overlays, list) {
  		info1 = overlay_infos[ovl1->id];
  
  		if (info1 == NULL)
  			continue;
  
  		list_for_each_entry(ovl2, &mgr->overlays, list) {
  			if (ovl1 == ovl2)
  				continue;
  
  			info2 = overlay_infos[ovl2->id];
  
  			if (info2 == NULL)
  				continue;
  
  			if (info1->zorder == info2->zorder) {
  				DSSERR("overlays %d and %d have the same "
  						"zorder %d\n",
  					ovl1->id, ovl2->id, info1->zorder);
  				return -EINVAL;
  			}
  		}
  	}
  
  	return 0;
  }
  
  int dss_mgr_check(struct omap_overlay_manager *mgr,
  		struct omap_dss_device *dssdev,
  		struct omap_overlay_manager_info *info,
  		struct omap_overlay_info **overlay_infos)
  {
  	struct omap_overlay *ovl;
  	int r;
  
  	if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
  		r = dss_mgr_check_zorder(mgr, overlay_infos);
  		if (r)
  			return r;
  	}
  
  	list_for_each_entry(ovl, &mgr->overlays, list) {
  		struct omap_overlay_info *oi;
  		int r;
  
  		oi = overlay_infos[ovl->id];
  
  		if (oi == NULL)
  			continue;
  
  		r = dss_ovl_check(ovl, oi, dssdev);
  		if (r)
  			return r;
  	}
  
  	return 0;
  }
  