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
31 #include <video/omapdss.h>
32
33 #include "dss.h"
34 #include "dss_features.h"
35
36 static int num_managers;
37 static struct omap_overlay_manager *managers;
38
dss_init_overlay_managers(struct platform_device * pdev)39 int dss_init_overlay_managers(struct platform_device *pdev)
40 {
41 int i, r;
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
72 mgr->caps = 0;
73 mgr->supported_displays =
74 dss_feat_get_supported_displays(mgr->id);
75 mgr->supported_outputs =
76 dss_feat_get_supported_outputs(mgr->id);
77
78 INIT_LIST_HEAD(&mgr->overlays);
79
80 r = dss_manager_kobj_init(mgr, pdev);
81 if (r)
82 DSSERR("failed to create sysfs file\n");
83 }
84
85 return 0;
86 }
87
dss_uninit_overlay_managers(struct platform_device * pdev)88 void dss_uninit_overlay_managers(struct platform_device *pdev)
89 {
90 int i;
91
92 for (i = 0; i < num_managers; ++i) {
93 struct omap_overlay_manager *mgr = &managers[i];
94 dss_manager_kobj_uninit(mgr);
95 }
96
97 kfree(managers);
98 managers = NULL;
99 num_managers = 0;
100 }
101
omap_dss_get_num_overlay_managers(void)102 int omap_dss_get_num_overlay_managers(void)
103 {
104 return num_managers;
105 }
106 EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
107
omap_dss_get_overlay_manager(int num)108 struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
109 {
110 if (num >= num_managers)
111 return NULL;
112
113 return &managers[num];
114 }
115 EXPORT_SYMBOL(omap_dss_get_overlay_manager);
116
dss_mgr_simple_check(struct omap_overlay_manager * mgr,const struct omap_overlay_manager_info * info)117 int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
118 const struct omap_overlay_manager_info *info)
119 {
120 if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
121 /*
122 * OMAP3 supports only graphics source transparency color key
123 * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
124 * Alpha Mode.
125 */
126 if (info->partial_alpha_enabled && info->trans_enabled
127 && info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
128 DSSERR("check_manager: illegal transparency key\n");
129 return -EINVAL;
130 }
131 }
132
133 return 0;
134 }
135
dss_mgr_check_zorder(struct omap_overlay_manager * mgr,struct omap_overlay_info ** overlay_infos)136 static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
137 struct omap_overlay_info **overlay_infos)
138 {
139 struct omap_overlay *ovl1, *ovl2;
140 struct omap_overlay_info *info1, *info2;
141
142 list_for_each_entry(ovl1, &mgr->overlays, list) {
143 info1 = overlay_infos[ovl1->id];
144
145 if (info1 == NULL)
146 continue;
147
148 list_for_each_entry(ovl2, &mgr->overlays, list) {
149 if (ovl1 == ovl2)
150 continue;
151
152 info2 = overlay_infos[ovl2->id];
153
154 if (info2 == NULL)
155 continue;
156
157 if (info1->zorder == info2->zorder) {
158 DSSERR("overlays %d and %d have the same "
159 "zorder %d\n",
160 ovl1->id, ovl2->id, info1->zorder);
161 return -EINVAL;
162 }
163 }
164 }
165
166 return 0;
167 }
168
dss_mgr_check_timings(struct omap_overlay_manager * mgr,const struct omap_video_timings * timings)169 int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
170 const struct omap_video_timings *timings)
171 {
172 if (!dispc_mgr_timings_ok(mgr->id, timings)) {
173 DSSERR("check_manager: invalid timings\n");
174 return -EINVAL;
175 }
176
177 return 0;
178 }
179
dss_mgr_check_lcd_config(struct omap_overlay_manager * mgr,const struct dss_lcd_mgr_config * config)180 static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
181 const struct dss_lcd_mgr_config *config)
182 {
183 struct dispc_clock_info cinfo = config->clock_info;
184 int dl = config->video_port_width;
185 bool stallmode = config->stallmode;
186 bool fifohandcheck = config->fifohandcheck;
187
188 if (cinfo.lck_div < 1 || cinfo.lck_div > 255)
189 return -EINVAL;
190
191 if (cinfo.pck_div < 1 || cinfo.pck_div > 255)
192 return -EINVAL;
193
194 if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
195 return -EINVAL;
196
197 /* fifohandcheck should be used only with stallmode */
198 if (stallmode == false && fifohandcheck == true)
199 return -EINVAL;
200
201 /*
202 * io pad mode can be only checked by using dssdev connected to the
203 * manager. Ignore checking these for now, add checks when manager
204 * is capable of holding information related to the connected interface
205 */
206
207 return 0;
208 }
209
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)210 int dss_mgr_check(struct omap_overlay_manager *mgr,
211 struct omap_overlay_manager_info *info,
212 const struct omap_video_timings *mgr_timings,
213 const struct dss_lcd_mgr_config *lcd_config,
214 struct omap_overlay_info **overlay_infos)
215 {
216 struct omap_overlay *ovl;
217 int r;
218
219 if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
220 r = dss_mgr_check_zorder(mgr, overlay_infos);
221 if (r)
222 return r;
223 }
224
225 r = dss_mgr_check_timings(mgr, mgr_timings);
226 if (r)
227 return r;
228
229 r = dss_mgr_check_lcd_config(mgr, lcd_config);
230 if (r)
231 return r;
232
233 list_for_each_entry(ovl, &mgr->overlays, list) {
234 struct omap_overlay_info *oi;
235 int r;
236
237 oi = overlay_infos[ovl->id];
238
239 if (oi == NULL)
240 continue;
241
242 r = dss_ovl_check(ovl, oi, mgr_timings);
243 if (r)
244 return r;
245 }
246
247 return 0;
248 }
249