1aac9b4191a9762e7556dcb2485c178fa0ff17d2
[android-sdk/kernel-video.git] / drivers / video / fbdev / omap2 / dss / manager.c
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  */
23 #define DSS_SUBSYS_NAME "MANAGER"
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>
31 #include <video/omapdss.h>
33 #include "dss.h"
34 #include "dss_features.h"
36 static int num_managers;
37 static struct omap_overlay_manager *managers;
39 int dss_init_overlay_managers(void)
40 {
41         int i;
43         num_managers = dss_feat_get_num_mgrs();
45         managers = kzalloc(sizeof(struct omap_overlay_manager) * num_managers,
46                         GFP_KERNEL);
48         BUG_ON(managers == NULL);
50         for (i = 0; i < num_managers; ++i) {
51                 struct omap_overlay_manager *mgr = &managers[i];
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                 }
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);
78                 INIT_LIST_HEAD(&mgr->overlays);
79         }
81         return 0;
82 }
84 int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
85 {
86         int i, r;
88         for (i = 0; i < num_managers; ++i) {
89                 struct omap_overlay_manager *mgr = &managers[i];
91                 r = dss_manager_kobj_init(mgr, pdev);
92                 if (r)
93                         DSSERR("failed to create sysfs file\n");
94         }
96         return 0;
97 }
99 void dss_uninit_overlay_managers(void)
101         kfree(managers);
102         managers = NULL;
103         num_managers = 0;
106 void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
108         int i;
110         for (i = 0; i < num_managers; ++i) {
111                 struct omap_overlay_manager *mgr = &managers[i];
113                 dss_manager_kobj_uninit(mgr);
114         }
117 int omap_dss_get_num_overlay_managers(void)
119         return num_managers;
121 EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
123 struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
125         if (num >= num_managers)
126                 return NULL;
128         return &managers[num];
130 EXPORT_SYMBOL(omap_dss_get_overlay_manager);
132 int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
133                 const struct omap_overlay_manager_info *info)
135         if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
136                 /*
137                  * OMAP3 supports only graphics source transparency color key
138                  * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
139                  * Alpha Mode.
140                  */
141                 if (info->partial_alpha_enabled && info->trans_enabled
142                         && info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
143                         DSSERR("check_manager: illegal transparency key\n");
144                         return -EINVAL;
145                 }
146         }
148         return 0;
151 static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
152                 struct omap_overlay_info **overlay_infos)
154         struct omap_overlay *ovl1, *ovl2;
155         struct omap_overlay_info *info1, *info2;
157         list_for_each_entry(ovl1, &mgr->overlays, list) {
158                 info1 = overlay_infos[ovl1->id];
160                 if (info1 == NULL)
161                         continue;
163                 list_for_each_entry(ovl2, &mgr->overlays, list) {
164                         if (ovl1 == ovl2)
165                                 continue;
167                         info2 = overlay_infos[ovl2->id];
169                         if (info2 == NULL)
170                                 continue;
172                         if (info1->zorder == info2->zorder) {
173                                 DSSERR("overlays %d and %d have the same "
174                                                 "zorder %d\n",
175                                         ovl1->id, ovl2->id, info1->zorder);
176                                 return -EINVAL;
177                         }
178                 }
179         }
181         return 0;
184 int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
185                 const struct omap_video_timings *timings)
187         if (!dispc_mgr_timings_ok(mgr->id, timings)) {
188                 DSSERR("check_manager: invalid timings\n");
189                 return -EINVAL;
190         }
192         return 0;
195 static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
196                 const struct dss_lcd_mgr_config *config)
198         struct dispc_clock_info cinfo = config->clock_info;
199         int dl = config->video_port_width;
200         bool stallmode = config->stallmode;
201         bool fifohandcheck = config->fifohandcheck;
203         if (cinfo.lck_div < 1 || cinfo.lck_div > 255)
204                 return -EINVAL;
206         if (cinfo.pck_div < 1 || cinfo.pck_div > 255)
207                 return -EINVAL;
209         if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
210                 return -EINVAL;
212         /* fifohandcheck should be used only with stallmode */
213         if (stallmode == false && fifohandcheck == true)
214                 return -EINVAL;
216         /*
217          * io pad mode can be only checked by using dssdev connected to the
218          * manager. Ignore checking these for now, add checks when manager
219          * is capable of holding information related to the connected interface
220          */
222         return 0;
225 int dss_mgr_check(struct omap_overlay_manager *mgr,
226                 struct omap_overlay_manager_info *info,
227                 const struct omap_video_timings *mgr_timings,
228                 const struct dss_lcd_mgr_config *lcd_config,
229                 struct omap_overlay_info **overlay_infos)
231         struct omap_overlay *ovl;
232         int r;
234         if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
235                 r = dss_mgr_check_zorder(mgr, overlay_infos);
236                 if (r)
237                         return r;
238         }
240         r = dss_mgr_check_timings(mgr, mgr_timings);
241         if (r)
242                 return r;
244         r = dss_mgr_check_lcd_config(mgr, lcd_config);
245         if (r)
246                 return r;
248         list_for_each_entry(ovl, &mgr->overlays, list) {
249                 struct omap_overlay_info *oi;
250                 int r;
252                 oi = overlay_infos[ovl->id];
254                 if (oi == NULL)
255                         continue;
257                 r = dss_ovl_check(ovl, oi, mgr_timings);
258                 if (r)
259                         return r;
260         }
262         return 0;