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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * linux/drivers/video/omap2/dss/manager.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 "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 25static int num_managers;26static struct omap_overlay_manager *managers;27 28int 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 72int 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 87void dss_uninit_overlay_managers(void)88{89 kfree(managers);90 managers = NULL;91 num_managers = 0;92}93 94void 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 105int omap_dss_get_num_overlay_managers(void)106{107 return num_managers;108}109EXPORT_SYMBOL(omap_dss_get_num_overlay_managers);110 111struct 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}118EXPORT_SYMBOL(omap_dss_get_overlay_manager);119 120int 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 key126 * and alpha blending simultaneously. See TRM 15.4.2.4.2.2127 * Alpha Mode.128 */129 if (info->partial_alpha_enabled && info->trans_enabled130 && 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 139static 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 172int 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 183static 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 the206 * manager. Ignore checking these for now, add checks when manager207 * is capable of holding information related to the connected interface208 */209 210 return 0;211}212 213int 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}252