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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2012 Texas Instruments Ltd4 * Author: Archit Taneja <archit@ti.com>5 */6 7#include <linux/kernel.h>8#include <linux/module.h>9#include <linux/platform_device.h>10#include <linux/slab.h>11#include <linux/of.h>12 13#include <video/omapfb_dss.h>14 15#include "dss.h"16 17static LIST_HEAD(output_list);18static DEFINE_MUTEX(output_lock);19 20int omapdss_output_set_device(struct omap_dss_device *out,21 struct omap_dss_device *dssdev)22{23 int r;24 25 mutex_lock(&output_lock);26 27 if (out->dst) {28 DSSERR("output already has device %s connected to it\n",29 out->dst->name);30 r = -EINVAL;31 goto err;32 }33 34 if (out->output_type != dssdev->type) {35 DSSERR("output type and display type don't match\n");36 r = -EINVAL;37 goto err;38 }39 40 out->dst = dssdev;41 dssdev->src = out;42 43 mutex_unlock(&output_lock);44 45 return 0;46err:47 mutex_unlock(&output_lock);48 49 return r;50}51EXPORT_SYMBOL(omapdss_output_set_device);52 53int omapdss_output_unset_device(struct omap_dss_device *out)54{55 int r;56 57 mutex_lock(&output_lock);58 59 if (!out->dst) {60 DSSERR("output doesn't have a device connected to it\n");61 r = -EINVAL;62 goto err;63 }64 65 if (out->dst->state != OMAP_DSS_DISPLAY_DISABLED) {66 DSSERR("device %s is not disabled, cannot unset device\n",67 out->dst->name);68 r = -EINVAL;69 goto err;70 }71 72 out->dst->src = NULL;73 out->dst = NULL;74 75 mutex_unlock(&output_lock);76 77 return 0;78err:79 mutex_unlock(&output_lock);80 81 return r;82}83EXPORT_SYMBOL(omapdss_output_unset_device);84 85int omapdss_register_output(struct omap_dss_device *out)86{87 list_add_tail(&out->list, &output_list);88 return 0;89}90EXPORT_SYMBOL(omapdss_register_output);91 92void omapdss_unregister_output(struct omap_dss_device *out)93{94 list_del(&out->list);95}96EXPORT_SYMBOL(omapdss_unregister_output);97 98struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id)99{100 struct omap_dss_device *out;101 102 list_for_each_entry(out, &output_list, list) {103 if (out->id == id)104 return out;105 }106 107 return NULL;108}109EXPORT_SYMBOL(omap_dss_get_output);110 111struct omap_dss_device *omap_dss_find_output(const char *name)112{113 struct omap_dss_device *out;114 115 list_for_each_entry(out, &output_list, list) {116 if (strcmp(out->name, name) == 0)117 return omap_dss_get_device(out);118 }119 120 return NULL;121}122EXPORT_SYMBOL(omap_dss_find_output);123 124struct omap_dss_device *omap_dss_find_output_by_port_node(struct device_node *port)125{126 struct device_node *src_node;127 struct omap_dss_device *out;128 u32 reg;129 130 src_node = dss_of_port_get_parent_device(port);131 if (!src_node)132 return NULL;133 134 reg = dss_of_port_get_port_number(port);135 136 list_for_each_entry(out, &output_list, list) {137 if (out->dev->of_node == src_node && out->port_num == reg) {138 of_node_put(src_node);139 return omap_dss_get_device(out);140 }141 }142 143 of_node_put(src_node);144 145 return NULL;146}147EXPORT_SYMBOL(omap_dss_find_output_by_port_node);148 149struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)150{151 while (dssdev->src)152 dssdev = dssdev->src;153 154 if (dssdev->id != 0)155 return omap_dss_get_device(dssdev);156 157 return NULL;158}159EXPORT_SYMBOL(omapdss_find_output_from_display);160 161struct omap_overlay_manager *omapdss_find_mgr_from_display(struct omap_dss_device *dssdev)162{163 struct omap_dss_device *out;164 struct omap_overlay_manager *mgr;165 166 out = omapdss_find_output_from_display(dssdev);167 168 if (out == NULL)169 return NULL;170 171 mgr = out->manager;172 173 omap_dss_put_device(out);174 175 return mgr;176}177EXPORT_SYMBOL(omapdss_find_mgr_from_display);178 179static const struct dss_mgr_ops *dss_mgr_ops;180 181int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)182{183 if (dss_mgr_ops)184 return -EBUSY;185 186 dss_mgr_ops = mgr_ops;187 188 return 0;189}190EXPORT_SYMBOL(dss_install_mgr_ops);191 192void dss_uninstall_mgr_ops(void)193{194 dss_mgr_ops = NULL;195}196EXPORT_SYMBOL(dss_uninstall_mgr_ops);197 198int dss_mgr_connect(struct omap_overlay_manager *mgr,199 struct omap_dss_device *dst)200{201 return dss_mgr_ops->connect(mgr, dst);202}203EXPORT_SYMBOL(dss_mgr_connect);204 205void dss_mgr_disconnect(struct omap_overlay_manager *mgr,206 struct omap_dss_device *dst)207{208 dss_mgr_ops->disconnect(mgr, dst);209}210EXPORT_SYMBOL(dss_mgr_disconnect);211 212void dss_mgr_set_timings(struct omap_overlay_manager *mgr,213 const struct omap_video_timings *timings)214{215 dss_mgr_ops->set_timings(mgr, timings);216}217EXPORT_SYMBOL(dss_mgr_set_timings);218 219void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,220 const struct dss_lcd_mgr_config *config)221{222 dss_mgr_ops->set_lcd_config(mgr, config);223}224EXPORT_SYMBOL(dss_mgr_set_lcd_config);225 226int dss_mgr_enable(struct omap_overlay_manager *mgr)227{228 return dss_mgr_ops->enable(mgr);229}230EXPORT_SYMBOL(dss_mgr_enable);231 232void dss_mgr_disable(struct omap_overlay_manager *mgr)233{234 dss_mgr_ops->disable(mgr);235}236EXPORT_SYMBOL(dss_mgr_disable);237 238void dss_mgr_start_update(struct omap_overlay_manager *mgr)239{240 dss_mgr_ops->start_update(mgr);241}242EXPORT_SYMBOL(dss_mgr_start_update);243 244int dss_mgr_register_framedone_handler(struct omap_overlay_manager *mgr,245 void (*handler)(void *), void *data)246{247 return dss_mgr_ops->register_framedone_handler(mgr, handler, data);248}249EXPORT_SYMBOL(dss_mgr_register_framedone_handler);250 251void dss_mgr_unregister_framedone_handler(struct omap_overlay_manager *mgr,252 void (*handler)(void *), void *data)253{254 dss_mgr_ops->unregister_framedone_handler(mgr, handler, data);255}256EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);257