[deliverable/linux.git] / drivers / video / fbdev / omap2 / omapfb / dss / manager.c

/*
 * 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/omapfb_dss.h>

#include "dss.h"
#include "dss_features.h"

static int num_managers;
static struct omap_overlay_manager *managers;

int dss_init_overlay_managers(void)
{
	int i;

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

		INIT_LIST_HEAD(&mgr->overlays);
	}

	return 0;
}

int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
{
	int i, r;

	for (i = 0; i < num_managers; ++i) {
		struct omap_overlay_manager *mgr = &managers[i];

		r = dss_manager_kobj_init(mgr, pdev);
		if (r)
			DSSERR("failed to create sysfs file\n");
	}

	return 0;
}

void dss_uninit_overlay_managers(void)
{
	kfree(managers);
	managers = NULL;
	num_managers = 0;
}

void dss_uninit_overlay_managers_sysfs(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);
	}
}

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 && fifohandcheck)
		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;
}
Commit	Line	Data
f76ee892 TV	1	/*
	2	* linux/drivers/video/omap2/dss/manager.c
	3	*
	4	* Copyright (C) 2009 Nokia Corporation
	5	* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
	6	*
	7	* Some code and ideas taken from drivers/video/omap/ driver
	8	* by Imre Deak.
	9	*
	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.
	13	*
	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
	17	* more details.
	18	*
	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/>.
	21	*/
	22
	23	#define DSS_SUBSYS_NAME "MANAGER"
	24
	25	#include <linux/kernel.h>
	26	#include <linux/slab.h>
	27	#include <linux/module.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/jiffies.h>
	30
62d9e44e	31	#include <video/omapfb_dss.h>
f76ee892 TV	32
	33	#include "dss.h"
	34	#include "dss_features.h"
	35
	36	static int num_managers;
	37	static struct omap_overlay_manager *managers;
	38
	39	int dss_init_overlay_managers(void)
	40	{
	41	int i;
	42
	43	num_managers = dss_feat_get_num_mgrs();
	44
	45	managers = kzalloc(sizeof(struct omap_overlay_manager) * num_managers,
	46	GFP_KERNEL);
	47
	48	BUG_ON(managers == NULL);
	49
	50	for (i = 0; i < num_managers; ++i) {
	51	struct omap_overlay_manager *mgr = &managers[i];
	52
	53	switch (i) {
	54	case 0:
	55	mgr->name = "lcd";
	56	mgr->id = OMAP_DSS_CHANNEL_LCD;
	57	break;
	58	case 1:
	59	mgr->name = "tv";
	60	mgr->id = OMAP_DSS_CHANNEL_DIGIT;
	61	break;
	62	case 2:
	63	mgr->name = "lcd2";
	64	mgr->id = OMAP_DSS_CHANNEL_LCD2;
	65	break;
	66	case 3:
	67	mgr->name = "lcd3";
	68	mgr->id = OMAP_DSS_CHANNEL_LCD3;
	69	break;
	70	}
	71
f76ee892 TV	72	mgr->supported_displays =
	73	dss_feat_get_supported_displays(mgr->id);
	74	mgr->supported_outputs =
	75	dss_feat_get_supported_outputs(mgr->id);
	76
	77	INIT_LIST_HEAD(&mgr->overlays);
	78	}
	79
	80	return 0;
	81	}
	82
	83	int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
	84	{
	85	int i, r;
	86
	87	for (i = 0; i < num_managers; ++i) {
	88	struct omap_overlay_manager *mgr = &managers[i];
	89
	90	r = dss_manager_kobj_init(mgr, pdev);
	91	if (r)
	92	DSSERR("failed to create sysfs file\n");
	93	}
	94
	95	return 0;
	96	}
	97
	98	void dss_uninit_overlay_managers(void)
	99	{
	100	kfree(managers);
	101	managers = NULL;
	102	num_managers = 0;
	103	}
	104
	105	void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
	106	{
	107	int i;
	108
	109	for (i = 0; i < num_managers; ++i) {
	110	struct omap_overlay_manager *mgr = &managers[i];
	111
	112	dss_manager_kobj_uninit(mgr);
	113	}
	114	}
	115
	116	int omap_dss_get_num_overlay_managers(void)
	117	{
	118	return num_managers;
	119	}
	120	EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
	121
	122	struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
	123	{
	124	if (num >= num_managers)
	125	return NULL;
	126
	127	return &managers[num];
	128	}
	129	EXPORT_SYMBOL(omap_dss_get_overlay_manager);
	130
	131	int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
	132	const struct omap_overlay_manager_info *info)
	133	{
	134	if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
	135	/*
136	* OMAP3 supports only graphics source transparency color key
137	* and alpha blending simultaneously. See TRM 15.4.2.4.2.2
138	* Alpha Mode.
139	*/
140	if (info->partial_alpha_enabled && info->trans_enabled
141	&& info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
142	DSSERR("check_manager: illegal transparency key\n");
143	return -EINVAL;
144	}
145	}
146
147	return 0;
148	}
149
150	static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
151	struct omap_overlay_info **overlay_infos)
152	{
153	struct omap_overlay ovl1, ovl2;
154	struct omap_overlay_info info1, info2;
155
156	list_for_each_entry(ovl1, &mgr->overlays, list) {
157	info1 = overlay_infos[ovl1->id];
158
159	if (info1 == NULL)
160	continue;
161
162	list_for_each_entry(ovl2, &mgr->overlays, list) {
163	if (ovl1 == ovl2)
164	continue;
165
166	info2 = overlay_infos[ovl2->id];
167
168	if (info2 == NULL)
169	continue;
170
171	if (info1->zorder == info2->zorder) {
172	DSSERR("overlays %d and %d have the same "
173	"zorder %d\n",
174	ovl1->id, ovl2->id, info1->zorder);
175	return -EINVAL;
176	}
177	}
178	}
179
180	return 0;
181	}
182
183	int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
184	const struct omap_video_timings *timings)
185	{
186	if (!dispc_mgr_timings_ok(mgr->id, timings)) {
187	DSSERR("check_manager: invalid timings\n");
188	return -EINVAL;
189	}
190
191	return 0;
192	}
193
194	static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
195	const struct dss_lcd_mgr_config *config)
196	{
197	struct dispc_clock_info cinfo = config->clock_info;
198	int dl = config->video_port_width;
199	bool stallmode = config->stallmode;
200	bool fifohandcheck = config->fifohandcheck;
201
202	if (cinfo.lck_div < 1 \|\| cinfo.lck_div > 255)
203	return -EINVAL;
204
205	if (cinfo.pck_div < 1 \|\| cinfo.pck_div > 255)
206	return -EINVAL;
207
208	if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
209	return -EINVAL;
210
211	/* fifohandcheck should be used only with stallmode */
212	if (!stallmode && fifohandcheck)
213	return -EINVAL;
214
215	/*
216	* io pad mode can be only checked by using dssdev connected to the
217	* manager. Ignore checking these for now, add checks when manager
218	* is capable of holding information related to the connected interface
219	*/
220
221	return 0;
222	}
223
224	int dss_mgr_check(struct omap_overlay_manager *mgr,
225	struct omap_overlay_manager_info *info,
226	const struct omap_video_timings *mgr_timings,
227	const struct dss_lcd_mgr_config *lcd_config,
228	struct omap_overlay_info **overlay_infos)
229	{
230	struct omap_overlay *ovl;
231	int r;
232
233	if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
234	r = dss_mgr_check_zorder(mgr, overlay_infos);
235	if (r)
236	return r;
237	}
238
239	r = dss_mgr_check_timings(mgr, mgr_timings);
240	if (r)
241	return r;
242
243	r = dss_mgr_check_lcd_config(mgr, lcd_config);
244	if (r)
245	return r;
246
247	list_for_each_entry(ovl, &mgr->overlays, list) {
248	struct omap_overlay_info *oi;
249	int r;
250
251	oi = overlay_infos[ovl->id];
252
253	if (oi == NULL)
254	continue;
255
256	r = dss_ovl_check(ovl, oi, mgr_timings);
257	if (r)
258	return r;
259	}
260
261	return 0;
262	}