drivers/video/fbdev/omap2/omapfb/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  */
  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/omapfb_dss.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
  39 int dss_init_overlay_managers(void)
  40 {
  41         int i;
  42
  43         num_managers = dss_feat_get_num_mgrs();
  44
  45         managers = kcalloc(num_managers, sizeof(struct omap_overlay_manager),
  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->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 }