1 // SPDX-License-Identifier: GPL-2.0-or-later
11 #include <linux/dma-mapping.h>
19 	if (path && overlay_id < path->overlay_num)  in path_get_overlay()
20 		return &path->overlays[overlay_id];  in path_get_overlay()
27 	for (i = 0; i < path->overlay_num; i++)  in path_check_status()
28 		if (path->overlays[i].status)  in path_check_status()
37  * this function fetches modelist from phy/panel:
39  *   or get from panel
46 	if (path->panel && path->panel->get_modelist)  in path_get_modelist()
47 		return path->panel->get_modelist(path->panel, modelist);  in path_get_modelist()
53  * panel list is used to pair panel/path when path/panel registered
56  * panel driver do panel register/unregister
64  * mmp_register_panel - register panel to panel_list and connect to path
65  * @p: panel to be registered
67  * this function provides interface for panel drivers to register panel
68  * to panel_list and connect to path which matchs panel->plat_path_name.
70  * panel register is permitted.
72 void mmp_register_panel(struct mmp_panel *panel)  in mmp_register_panel()  argument
79 	list_add_tail(&panel->node, &panel_list);  in mmp_register_panel()
83 		if (!strcmp(panel->plat_path_name, path->name)) {  in mmp_register_panel()
84 			dev_info(panel->dev, "connect to path %s\n",  in mmp_register_panel()
85 				path->name);  in mmp_register_panel()
86 			path->panel = panel;  in mmp_register_panel()
96  * mmp_unregister_panel - unregister panel from panel_list and disconnect
97  * @p: panel to be unregistered
99  * this function provides interface for panel drivers to unregister panel
102 void mmp_unregister_panel(struct mmp_panel *panel)  in mmp_unregister_panel()  argument
107 	list_del(&panel->node);  in mmp_unregister_panel()
110 		if (path->panel && path->panel == panel) {  in mmp_unregister_panel()
111 			dev_info(panel->dev, "disconnect from path %s\n",  in mmp_unregister_panel()
112 				path->name);  in mmp_unregister_panel()
113 			path->panel = NULL;  in mmp_unregister_panel()
122  * mmp_get_path - get path by name
134 		if (!strcmp(name, iter->name)) {  in mmp_get_path()
146  * mmp_register_path - init and register path by path_info
150  * this function also try to connect path with panel by name
156 	struct mmp_panel *panel;  in mmp_register_path()  local
158 	path = kzalloc(struct_size(path, overlays, info->overlay_num),  in mmp_register_path()
164 	mutex_init(&path->access_ok);  in mmp_register_path()
165 	path->dev = info->dev;  in mmp_register_path()
166 	path->id = info->id;  in mmp_register_path()
167 	path->name = info->name;  in mmp_register_path()
168 	path->output_type = info->output_type;  in mmp_register_path()
169 	path->overlay_num = info->overlay_num;  in mmp_register_path()
170 	path->plat_data = info->plat_data;  in mmp_register_path()
171 	path->ops.set_mode = info->set_mode;  in mmp_register_path()
174 	/* get panel */  in mmp_register_path()
175 	list_for_each_entry(panel, &panel_list, node) {  in mmp_register_path()
176 		if (!strcmp(info->name, panel->plat_path_name)) {  in mmp_register_path()
177 			dev_info(path->dev, "get panel %s\n", panel->name);  in mmp_register_path()
178 			path->panel = panel;  in mmp_register_path()
183 	dev_info(path->dev, "register %s, overlay_num %d\n",  in mmp_register_path()
184 			path->name, path->overlay_num);  in mmp_register_path()
186 	/* default op set: if already set by driver, never cover it */  in mmp_register_path()
187 	if (!path->ops.check_status)  in mmp_register_path()
188 		path->ops.check_status = path_check_status;  in mmp_register_path()
189 	if (!path->ops.get_overlay)  in mmp_register_path()
190 		path->ops.get_overlay = path_get_overlay;  in mmp_register_path()
191 	if (!path->ops.get_modelist)  in mmp_register_path()
192 		path->ops.get_modelist = path_get_modelist;  in mmp_register_path()
195 	for (i = 0; i < path->overlay_num; i++) {  in mmp_register_path()
196 		path->overlays[i].path = path;  in mmp_register_path()
197 		path->overlays[i].id = i;  in mmp_register_path()
198 		mutex_init(&path->overlays[i].access_ok);  in mmp_register_path()
199 		path->overlays[i].ops = info->overlay_ops;  in mmp_register_path()
203 	list_add_tail(&path->node, &path_list);  in mmp_register_path()
211  * mmp_unregister_path - unregister and destroy path
225 	list_del(&path->node);  in mmp_unregister_path()
228 	for (i = 0; i < path->overlay_num; i++)  in mmp_unregister_path()
229 		mutex_destroy(&path->overlays[i].access_ok);  in mmp_unregister_path()
231 	mutex_destroy(&path->access_ok);  in mmp_unregister_path()