1 /* 2 * linux/drivers/video/omap2/dss/overlay.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 "OVERLAY" 24 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/err.h> 28 #include <linux/sysfs.h> 29 #include <linux/platform_device.h> 30 #include <linux/delay.h> 31 #include <linux/slab.h> 32 33 #include <video/omapdss.h> 34 35 #include "dss.h" 36 #include "dss_features.h" 37 38 static int num_overlays; 39 static struct omap_overlay *overlays; 40 41 int omap_dss_get_num_overlays(void) 42 { 43 return num_overlays; 44 } 45 EXPORT_SYMBOL(omap_dss_get_num_overlays); 46 47 struct omap_overlay *omap_dss_get_overlay(int num) 48 { 49 if (num >= num_overlays) 50 return NULL; 51 52 return &overlays[num]; 53 } 54 EXPORT_SYMBOL(omap_dss_get_overlay); 55 56 void dss_init_overlays(struct platform_device *pdev) 57 { 58 int i, r; 59 60 num_overlays = dss_feat_get_num_ovls(); 61 62 overlays = kzalloc(sizeof(struct omap_overlay) * num_overlays, 63 GFP_KERNEL); 64 65 BUG_ON(overlays == NULL); 66 67 for (i = 0; i < num_overlays; ++i) { 68 struct omap_overlay *ovl = &overlays[i]; 69 70 switch (i) { 71 case 0: 72 ovl->name = "gfx"; 73 ovl->id = OMAP_DSS_GFX; 74 break; 75 case 1: 76 ovl->name = "vid1"; 77 ovl->id = OMAP_DSS_VIDEO1; 78 break; 79 case 2: 80 ovl->name = "vid2"; 81 ovl->id = OMAP_DSS_VIDEO2; 82 break; 83 case 3: 84 ovl->name = "vid3"; 85 ovl->id = OMAP_DSS_VIDEO3; 86 break; 87 } 88 89 ovl->caps = dss_feat_get_overlay_caps(ovl->id); 90 ovl->supported_modes = 91 dss_feat_get_supported_color_modes(ovl->id); 92 93 r = dss_overlay_kobj_init(ovl, pdev); 94 if (r) 95 DSSERR("failed to create sysfs file\n"); 96 } 97 } 98 99 void dss_uninit_overlays(struct platform_device *pdev) 100 { 101 int i; 102 103 for (i = 0; i < num_overlays; ++i) { 104 struct omap_overlay *ovl = &overlays[i]; 105 dss_overlay_kobj_uninit(ovl); 106 } 107 108 kfree(overlays); 109 overlays = NULL; 110 num_overlays = 0; 111 } 112 113 int dss_ovl_simple_check(struct omap_overlay *ovl, 114 const struct omap_overlay_info *info) 115 { 116 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) { 117 if (info->out_width != 0 && info->width != info->out_width) { 118 DSSERR("check_overlay: overlay %d doesn't support " 119 "scaling\n", ovl->id); 120 return -EINVAL; 121 } 122 123 if (info->out_height != 0 && info->height != info->out_height) { 124 DSSERR("check_overlay: overlay %d doesn't support " 125 "scaling\n", ovl->id); 126 return -EINVAL; 127 } 128 } 129 130 if ((ovl->supported_modes & info->color_mode) == 0) { 131 DSSERR("check_overlay: overlay %d doesn't support mode %d\n", 132 ovl->id, info->color_mode); 133 return -EINVAL; 134 } 135 136 if (info->zorder >= omap_dss_get_num_overlays()) { 137 DSSERR("check_overlay: zorder %d too high\n", info->zorder); 138 return -EINVAL; 139 } 140 141 if (dss_feat_rotation_type_supported(info->rotation_type) == 0) { 142 DSSERR("check_overlay: rotation type %d not supported\n", 143 info->rotation_type); 144 return -EINVAL; 145 } 146 147 return 0; 148 } 149 150 int dss_ovl_check(struct omap_overlay *ovl, struct omap_overlay_info *info, 151 const struct omap_video_timings *mgr_timings) 152 { 153 u16 outw, outh; 154 u16 dw, dh; 155 156 dw = mgr_timings->x_res; 157 dh = mgr_timings->y_res; 158 159 if ((ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) { 160 outw = info->width; 161 outh = info->height; 162 } else { 163 if (info->out_width == 0) 164 outw = info->width; 165 else 166 outw = info->out_width; 167 168 if (info->out_height == 0) 169 outh = info->height; 170 else 171 outh = info->out_height; 172 } 173 174 if (dw < info->pos_x + outw) { 175 DSSERR("overlay %d horizontally not inside the display area " 176 "(%d + %d >= %d)\n", 177 ovl->id, info->pos_x, outw, dw); 178 return -EINVAL; 179 } 180 181 if (dh < info->pos_y + outh) { 182 DSSERR("overlay %d vertically not inside the display area " 183 "(%d + %d >= %d)\n", 184 ovl->id, info->pos_y, outh, dh); 185 return -EINVAL; 186 } 187 188 return 0; 189 } 190 191 /* 192 * Checks if replication logic should be used. Only use when overlay is in 193 * RGB12U or RGB16 mode, and video port width interface is 18bpp or 24bpp 194 */ 195 bool dss_ovl_use_replication(struct dss_lcd_mgr_config config, 196 enum omap_color_mode mode) 197 { 198 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16) 199 return false; 200 201 return config.video_port_width > 16; 202 } 203