aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/fbdev/omap2/omapfb/dss/manager.c
blob: 11f67ac88089e85737ccf5d4030682093fd8b570 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/*
 * 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;

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;
}