drivers/video/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  */
  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
  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
  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
 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
 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
 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
 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
 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
 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
 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 }