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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * linux/drivers/video/omap2/dss/overlay.c4 *5 * Copyright (C) 2009 Nokia Corporation6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>7 *8 * Some code and ideas taken from drivers/video/omap/ driver9 * 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 27static int num_overlays;28static struct omap_overlay *overlays;29 30int omap_dss_get_num_overlays(void)31{32 return num_overlays;33}34EXPORT_SYMBOL(omap_dss_get_num_overlays);35 36struct omap_overlay *omap_dss_get_overlay(int num)37{38 if (num >= num_overlays)39 return NULL;40 41 return &overlays[num];42}43EXPORT_SYMBOL(omap_dss_get_overlay);44 45void 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 88void 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 102int 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 139int 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 else155 outw = info->out_width;156 157 if (info->out_height == 0)158 outh = info->height;159 else160 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 in182 * RGB12U or RGB16 mode, and video port width interface is 18bpp or 24bpp183 */184bool 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}192