drivers/video/omap2/dss/manager.c - linux - Git at Google

 /*
  * 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 inline struct omap_dss_device *dss_mgr_get_device(struct omap_overlay_manager *mgr)
 {
 	return mgr->output ? mgr->output->device : NULL;
 }

 static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
 {
 	unsigned long timeout = msecs_to_jiffies(500);
 	struct omap_dss_device *dssdev = mgr->get_device(mgr);
 	u32 irq;
 	int r;

 	r = dispc_runtime_get();
 	if (r)
 		return r;

 	if (dssdev->type == OMAP_DISPLAY_TYPE_VENC)
 		irq = DISPC_IRQ_EVSYNC_ODD;
 	else if (dssdev->type == OMAP_DISPLAY_TYPE_HDMI)
 		irq = DISPC_IRQ_EVSYNC_EVEN;
 	else
 		irq = dispc_mgr_get_vsync_irq(mgr->id);

 	r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);

 	dispc_runtime_put();

 	return r;
 }

 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;
 		case 3:
 			mgr->name = "lcd3";
 			mgr->id = OMAP_DSS_CHANNEL_LCD3;
 			break;
 		}

 		mgr->set_output = &dss_mgr_set_output;
 		mgr->unset_output = &dss_mgr_unset_output;
 		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->get_device = &dss_mgr_get_device;

 		mgr->caps = 0;
 		mgr->supported_displays =
 			dss_feat_get_supported_displays(mgr->id);
 		mgr->supported_outputs =
 			dss_feat_get_supported_outputs(mgr->id);

 		INIT_LIST_HEAD(&mgr->overlays);

 		r = dss_manager_kobj_init(mgr, pdev);
 		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];
 		dss_manager_kobj_uninit(mgr);
 	}

 	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_timings(struct omap_overlay_manager *mgr,
 		const struct omap_video_timings *timings)
 {
 	if (!dispc_mgr_timings_ok(mgr->id, timings)) {
 		DSSERR("check_manager: invalid timings\n");
 		return -EINVAL;
 	}

 	return 0;
 }

 static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
 		const struct dss_lcd_mgr_config *config)
 {
 	struct dispc_clock_info cinfo = config->clock_info;
 	int dl = config->video_port_width;
 	bool stallmode = config->stallmode;
 	bool fifohandcheck = config->fifohandcheck;

 	if (cinfo.lck_div < 1 || cinfo.lck_div > 255)
 		return -EINVAL;

 	if (cinfo.pck_div < 1 || cinfo.pck_div > 255)
 		return -EINVAL;

 	if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
 		return -EINVAL;

 	/* fifohandcheck should be used only with stallmode */
 	if (stallmode == false && fifohandcheck == true)
 		return -EINVAL;

 	/*
 	 * io pad mode can be only checked by using dssdev connected to the
 	 * manager. Ignore checking these for now, add checks when manager
 	 * is capable of holding information related to the connected interface
 	 */

 	return 0;
 }

 int dss_mgr_check(struct omap_overlay_manager *mgr,
 		struct omap_overlay_manager_info *info,
 		const struct omap_video_timings *mgr_timings,
 		const struct dss_lcd_mgr_config *lcd_config,
 		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;
 	}

 	r = dss_mgr_check_timings(mgr, mgr_timings);
 	if (r)
 		return r;

 	r = dss_mgr_check_lcd_config(mgr, lcd_config);
 	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, mgr_timings);
 		if (r)
 			return r;
 	}

 	return 0;
 }
	/*
	* 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 inline struct omap_dss_device dss_mgr_get_device(struct omap_overlay_manager mgr)
	{
	return mgr->output ? mgr->output->device : NULL;
	}

	static int dss_mgr_wait_for_vsync(struct omap_overlay_manager *mgr)
	{
	unsigned long timeout = msecs_to_jiffies(500);
	struct omap_dss_device *dssdev = mgr->get_device(mgr);
	u32 irq;
	int r;

	r = dispc_runtime_get();
	if (r)
	return r;

	if (dssdev->type == OMAP_DISPLAY_TYPE_VENC)
	irq = DISPC_IRQ_EVSYNC_ODD;
	else if (dssdev->type == OMAP_DISPLAY_TYPE_HDMI)
	irq = DISPC_IRQ_EVSYNC_EVEN;
	else
	irq = dispc_mgr_get_vsync_irq(mgr->id);

	r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);

	dispc_runtime_put();

	return r;
	}

	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;
	case 3:
	mgr->name = "lcd3";
	mgr->id = OMAP_DSS_CHANNEL_LCD3;
	break;
	}

	mgr->set_output = &dss_mgr_set_output;
	mgr->unset_output = &dss_mgr_unset_output;
	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->get_device = &dss_mgr_get_device;

	mgr->caps = 0;
	mgr->supported_displays =
	dss_feat_get_supported_displays(mgr->id);
	mgr->supported_outputs =
	dss_feat_get_supported_outputs(mgr->id);

	INIT_LIST_HEAD(&mgr->overlays);

	r = dss_manager_kobj_init(mgr, pdev);
	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];
	dss_manager_kobj_uninit(mgr);
	}

	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_timings(struct omap_overlay_manager *mgr,
	const struct omap_video_timings *timings)
	{
	if (!dispc_mgr_timings_ok(mgr->id, timings)) {
	DSSERR("check_manager: invalid timings\n");
	return -EINVAL;
	}

	return 0;
	}

	static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
	const struct dss_lcd_mgr_config *config)
	{
	struct dispc_clock_info cinfo = config->clock_info;
	int dl = config->video_port_width;
	bool stallmode = config->stallmode;
	bool fifohandcheck = config->fifohandcheck;

	if (cinfo.lck_div < 1 \|\| cinfo.lck_div > 255)
	return -EINVAL;

	if (cinfo.pck_div < 1 \|\| cinfo.pck_div > 255)
	return -EINVAL;

	if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
	return -EINVAL;

	/* fifohandcheck should be used only with stallmode */
	if (stallmode == false && fifohandcheck == true)
	return -EINVAL;

	/*
	* io pad mode can be only checked by using dssdev connected to the
	* manager. Ignore checking these for now, add checks when manager
	* is capable of holding information related to the connected interface
	*/

	return 0;
	}

	int dss_mgr_check(struct omap_overlay_manager *mgr,
	struct omap_overlay_manager_info *info,
	const struct omap_video_timings *mgr_timings,
	const struct dss_lcd_mgr_config *lcd_config,
	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;
	}

	r = dss_mgr_check_timings(mgr, mgr_timings);
	if (r)
	return r;

	r = dss_mgr_check_lcd_config(mgr, lcd_config);
	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, mgr_timings);
	if (r)
	return r;
	}

	return 0;
	}