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