/* $NetBSD: drm_panel.c,v 1.2.4.2 2020/01/05 11:05:53 martin Exp $ */ /* * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sub license, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #include __KERNEL_RCSID(0, "$NetBSD: drm_panel.c,v 1.2.4.2 2020/01/05 11:05:53 martin Exp $"); #include #include #include #include #ifdef __NetBSD__ static struct mutex panel_lock; static struct list_head panel_list = LIST_HEAD_INIT(panel_list); #else static DEFINE_MUTEX(panel_lock); static LIST_HEAD(panel_list); #endif #ifdef __NetBSD__ void drm_panel_init_lock(void) { linux_mutex_init(&panel_lock); } void drm_panel_fini_lock(void) { linux_mutex_destroy(&panel_lock); } #endif void drm_panel_init(struct drm_panel *panel) { INIT_LIST_HEAD(&panel->list); } EXPORT_SYMBOL(drm_panel_init); int drm_panel_add(struct drm_panel *panel) { mutex_lock(&panel_lock); list_add_tail(&panel->list, &panel_list); mutex_unlock(&panel_lock); return 0; } EXPORT_SYMBOL(drm_panel_add); void drm_panel_remove(struct drm_panel *panel) { mutex_lock(&panel_lock); list_del_init(&panel->list); mutex_unlock(&panel_lock); } EXPORT_SYMBOL(drm_panel_remove); int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) { if (panel->connector) return -EBUSY; panel->connector = connector; panel->drm = connector->dev; return 0; } EXPORT_SYMBOL(drm_panel_attach); int drm_panel_detach(struct drm_panel *panel) { panel->connector = NULL; panel->drm = NULL; return 0; } EXPORT_SYMBOL(drm_panel_detach); #ifdef CONFIG_OF struct drm_panel *of_drm_find_panel(struct device_node *np) { struct drm_panel *panel; mutex_lock(&panel_lock); list_for_each_entry(panel, &panel_list, list) { if (panel->dev->of_node == np) { mutex_unlock(&panel_lock); return panel; } } mutex_unlock(&panel_lock); return NULL; } EXPORT_SYMBOL(of_drm_find_panel); #endif MODULE_AUTHOR("Thierry Reding "); MODULE_DESCRIPTION("DRM panel infrastructure"); MODULE_LICENSE("GPL and additional rights");