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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/video/omap2/dss/overlay.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 "OVERLAY"
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/err.h>
  17 #include <linux/sysfs.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/delay.h>
  20 #include <linux/slab.h>
  21
  22 #include <video/omapfb_dss.h>
  23
  24 #include "dss.h"
  25 #include "dss_features.h"
  26
  27 static int num_overlays;
  28 static struct omap_overlay *overlays;
  29
  30 int omap_dss_get_num_overlays(void)
  31 {
  32         return num_overlays;
  33 }
  34 EXPORT_SYMBOL(omap_dss_get_num_overlays);
  35
  36 struct omap_overlay *omap_dss_get_overlay(int num)
  37 {
  38         if (num >= num_overlays)
  39                 return NULL;
  40
  41         return &overlays[num];
  42 }
  43 EXPORT_SYMBOL(omap_dss_get_overlay);
  44
  45 void dss_init_overlays(struct platform_device *pdev)
  46 {
  47         int i, r;
  48
  49         num_overlays = dss_feat_get_num_ovls();
  50
  51         overlays = kcalloc(num_overlays, sizeof(struct omap_overlay),
  52                            GFP_KERNEL);
  53
  54         BUG_ON(overlays == NULL);
  55
  56         for (i = 0; i < num_overlays; ++i) {
  57                 struct omap_overlay *ovl = &overlays[i];
  58
  59                 switch (i) {
  60                 case 0:
  61                         ovl->name = "gfx";
  62                         ovl->id = OMAP_DSS_GFX;
  63                         break;
  64                 case 1:
  65                         ovl->name = "vid1";
  66                         ovl->id = OMAP_DSS_VIDEO1;
  67                         break;
  68                 case 2:
  69                         ovl->name = "vid2";
  70                         ovl->id = OMAP_DSS_VIDEO2;
  71                         break;
  72                 case 3:
  73                         ovl->name = "vid3";
  74                         ovl->id = OMAP_DSS_VIDEO3;
  75                         break;
  76                 }
  77
  78                 ovl->caps = dss_feat_get_overlay_caps(ovl->id);
  79                 ovl->supported_modes =
  80                         dss_feat_get_supported_color_modes(ovl->id);
  81
  82                 r = dss_overlay_kobj_init(ovl, pdev);
  83                 if (r)
  84                         DSSERR("failed to create sysfs file\n");
  85         }
  86 }
  87
  88 void dss_uninit_overlays(struct platform_device *pdev)
  89 {
  90         int i;
  91
  92         for (i = 0; i < num_overlays; ++i) {
  93                 struct omap_overlay *ovl = &overlays[i];
  94                 dss_overlay_kobj_uninit(ovl);
  95         }
  96
  97         kfree(overlays);
  98         overlays = NULL;
  99         num_overlays = 0;
 100 }
 101
 102 int dss_ovl_simple_check(struct omap_overlay *ovl,
 103                 const struct omap_overlay_info *info)
 104 {
 105         if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
 106                 if (info->out_width != 0 && info->width != info->out_width) {
 107                         DSSERR("check_overlay: overlay %d doesn't support "
 108                                         "scaling\n", ovl->id);
 109                         return -EINVAL;
 110                 }
 111
 112                 if (info->out_height != 0 && info->height != info->out_height) {
 113                         DSSERR("check_overlay: overlay %d doesn't support "
 114                                         "scaling\n", ovl->id);
 115                         return -EINVAL;
 116                 }
 117         }
 118
 119         if ((ovl->supported_modes & info->color_mode) == 0) {
 120                 DSSERR("check_overlay: overlay %d doesn't support mode %d\n",
 121                                 ovl->id, info->color_mode);
 122                 return -EINVAL;
 123         }
 124
 125         if (info->zorder >= omap_dss_get_num_overlays()) {
 126                 DSSERR("check_overlay: zorder %d too high\n", info->zorder);
 127                 return -EINVAL;
 128         }
 129
 130         if (dss_feat_rotation_type_supported(info->rotation_type) == 0) {
 131                 DSSERR("check_overlay: rotation type %d not supported\n",
 132                                 info->rotation_type);
 133                 return -EINVAL;
 134         }
 135
 136         return 0;
 137 }
 138
 139 int dss_ovl_check(struct omap_overlay *ovl, struct omap_overlay_info *info,
 140                 const struct omap_video_timings *mgr_timings)
 141 {
 142         u16 outw, outh;
 143         u16 dw, dh;
 144
 145         dw = mgr_timings->x_res;
 146         dh = mgr_timings->y_res;
 147
 148         if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
 149                 outw = info->width;
 150                 outh = info->height;
 151         } else {
 152                 if (info->out_width == 0)
 153                         outw = info->width;
 154                 else
 155                         outw = info->out_width;
 156
 157                 if (info->out_height == 0)
 158                         outh = info->height;
 159                 else
 160                         outh = info->out_height;
 161         }
 162
 163         if (dw < info->pos_x + outw) {
 164                 DSSERR("overlay %d horizontally not inside the display area "
 165                                 "(%d + %d >= %d)\n",
 166                                 ovl->id, info->pos_x, outw, dw);
 167                 return -EINVAL;
 168         }
 169
 170         if (dh < info->pos_y + outh) {
 171                 DSSERR("overlay %d vertically not inside the display area "
 172                                 "(%d + %d >= %d)\n",
 173                                 ovl->id, info->pos_y, outh, dh);
 174                 return -EINVAL;
 175         }
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * Checks if replication logic should be used. Only use when overlay is in
 182  * RGB12U or RGB16 mode, and video port width interface is 18bpp or 24bpp
 183  */
 184 bool dss_ovl_use_replication(struct dss_lcd_mgr_config config,
 185                 enum omap_color_mode mode)
 186 {
 187         if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
 188                 return false;
 189
 190         return config.video_port_width > 16;
 191 }