drivers/video/fbdev/omap2/omapfb/dss/manager.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/video/omap2/dss/manager.c
   4  *
   5  * Copyright (C) 2009 Nokia Corporation
   6  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   7  *
   8  * Some code and ideas taken from drivers/video/omap/ driver
   9  * by Imre Deak.
  10  */
  11
  12 #define DSS_SUBSYS_NAME "MANAGER"
  13
  14 #include <linux/kernel.h>
  15 #include <linux/slab.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/jiffies.h>
  19
  20 #include <video/omapfb_dss.h>
  21
  22 #include "dss.h"
  23 #include "dss_features.h"
  24
  25 static int num_managers;
  26 static struct omap_overlay_manager *managers;
  27
  28 int dss_init_overlay_managers(void)
  29 {
  30         int i;
  31
  32         num_managers = dss_feat_get_num_mgrs();
  33
  34         managers = kcalloc(num_managers, sizeof(struct omap_overlay_manager),
  35                            GFP_KERNEL);
  36
  37         BUG_ON(managers == NULL);
  38
  39         for (i = 0; i < num_managers; ++i) {
  40                 struct omap_overlay_manager *mgr = &managers[i];
  41
  42                 switch (i) {
  43                 case 0:
  44                         mgr->name = "lcd";
  45                         mgr->id = OMAP_DSS_CHANNEL_LCD;
  46                         break;
  47                 case 1:
  48                         mgr->name = "tv";
  49                         mgr->id = OMAP_DSS_CHANNEL_DIGIT;
  50                         break;
  51                 case 2:
  52                         mgr->name = "lcd2";
  53                         mgr->id = OMAP_DSS_CHANNEL_LCD2;
  54                         break;
  55                 case 3:
  56                         mgr->name = "lcd3";
  57                         mgr->id = OMAP_DSS_CHANNEL_LCD3;
  58                         break;
  59                 }
  60
  61                 mgr->supported_displays =
  62                         dss_feat_get_supported_displays(mgr->id);
  63                 mgr->supported_outputs =
  64                         dss_feat_get_supported_outputs(mgr->id);
  65
  66                 INIT_LIST_HEAD(&mgr->overlays);
  67         }
  68
  69         return 0;
  70 }
  71
  72 int dss_init_overlay_managers_sysfs(struct platform_device *pdev)
  73 {
  74         int i, r;
  75
  76         for (i = 0; i < num_managers; ++i) {
  77                 struct omap_overlay_manager *mgr = &managers[i];
  78
  79                 r = dss_manager_kobj_init(mgr, pdev);
  80                 if (r)
  81                         DSSERR("failed to create sysfs file\n");
  82         }
  83
  84         return 0;
  85 }
  86
  87 void dss_uninit_overlay_managers(void)
  88 {
  89         kfree(managers);
  90         managers = NULL;
  91         num_managers = 0;
  92 }
  93
  94 void dss_uninit_overlay_managers_sysfs(struct platform_device *pdev)
  95 {
  96         int i;
  97
  98         for (i = 0; i < num_managers; ++i) {
  99                 struct omap_overlay_manager *mgr = &managers[i];
 100
 101                 dss_manager_kobj_uninit(mgr);
 102         }
 103 }
 104
 105 int omap_dss_get_num_overlay_managers(void)
 106 {
 107         return num_managers;
 108 }
 109 EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);
 110
 111 struct omap_overlay_manager *omap_dss_get_overlay_manager(int num)
 112 {
 113         if (num >= num_managers)
 114                 return NULL;
 115
 116         return &managers[num];
 117 }
 118 EXPORT_SYMBOL(omap_dss_get_overlay_manager);
 119
 120 int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
 121                 const struct omap_overlay_manager_info *info)
 122 {
 123         if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
 124                 /*
 125                  * OMAP3 supports only graphics source transparency color key
 126                  * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
 127                  * Alpha Mode.
 128                  */
 129                 if (info->partial_alpha_enabled && info->trans_enabled
 130                         && info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
 131                         DSSERR("check_manager: illegal transparency key\n");
 132                         return -EINVAL;
 133                 }
 134         }
 135
 136         return 0;
 137 }
 138
 139 static int dss_mgr_check_zorder(struct omap_overlay_manager *mgr,
 140                 struct omap_overlay_info **overlay_infos)
 141 {
 142         struct omap_overlay *ovl1, *ovl2;
 143         struct omap_overlay_info *info1, *info2;
 144
 145         list_for_each_entry(ovl1, &mgr->overlays, list) {
 146                 info1 = overlay_infos[ovl1->id];
 147
 148                 if (info1 == NULL)
 149                         continue;
 150
 151                 list_for_each_entry(ovl2, &mgr->overlays, list) {
 152                         if (ovl1 == ovl2)
 153                                 continue;
 154
 155                         info2 = overlay_infos[ovl2->id];
 156
 157                         if (info2 == NULL)
 158                                 continue;
 159
 160                         if (info1->zorder == info2->zorder) {
 161                                 DSSERR("overlays %d and %d have the same "
 162                                                 "zorder %d\n",
 163                                         ovl1->id, ovl2->id, info1->zorder);
 164                                 return -EINVAL;
 165                         }
 166                 }
 167         }
 168
 169         return 0;
 170 }
 171
 172 int dss_mgr_check_timings(struct omap_overlay_manager *mgr,
 173                 const struct omap_video_timings *timings)
 174 {
 175         if (!dispc_mgr_timings_ok(mgr->id, timings)) {
 176                 DSSERR("check_manager: invalid timings\n");
 177                 return -EINVAL;
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int dss_mgr_check_lcd_config(struct omap_overlay_manager *mgr,
 184                 const struct dss_lcd_mgr_config *config)
 185 {
 186         struct dispc_clock_info cinfo = config->clock_info;
 187         int dl = config->video_port_width;
 188         bool stallmode = config->stallmode;
 189         bool fifohandcheck = config->fifohandcheck;
 190
 191         if (cinfo.lck_div < 1 || cinfo.lck_div > 255)
 192                 return -EINVAL;
 193
 194         if (cinfo.pck_div < 1 || cinfo.pck_div > 255)
 195                 return -EINVAL;
 196
 197         if (dl != 12 && dl != 16 && dl != 18 && dl != 24)
 198                 return -EINVAL;
 199
 200         /* fifohandcheck should be used only with stallmode */
 201         if (!stallmode && fifohandcheck)
 202                 return -EINVAL;
 203
 204         /*
 205          * io pad mode can be only checked by using dssdev connected to the
 206          * manager. Ignore checking these for now, add checks when manager
 207          * is capable of holding information related to the connected interface
 208          */
 209
 210         return 0;
 211 }
 212
 213 int dss_mgr_check(struct omap_overlay_manager *mgr,
 214                 struct omap_overlay_manager_info *info,
 215                 const struct omap_video_timings *mgr_timings,
 216                 const struct dss_lcd_mgr_config *lcd_config,
 217                 struct omap_overlay_info **overlay_infos)
 218 {
 219         struct omap_overlay *ovl;
 220         int r;
 221
 222         if (dss_has_feature(FEAT_ALPHA_FREE_ZORDER)) {
 223                 r = dss_mgr_check_zorder(mgr, overlay_infos);
 224                 if (r)
 225                         return r;
 226         }
 227
 228         r = dss_mgr_check_timings(mgr, mgr_timings);
 229         if (r)
 230                 return r;
 231
 232         r = dss_mgr_check_lcd_config(mgr, lcd_config);
 233         if (r)
 234                 return r;
 235
 236         list_for_each_entry(ovl, &mgr->overlays, list) {
 237                 struct omap_overlay_info *oi;
 238                 int r;
 239
 240                 oi = overlay_infos[ovl->id];
 241
 242                 if (oi == NULL)
 243                         continue;
 244
 245                 r = dss_ovl_check(ovl, oi, mgr_timings);
 246                 if (r)
 247                         return r;
 248         }
 249
 250         return 0;
 251 }