/*
* 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 <linux/err.h>
#include <linux/module.h>
#include <drm/drm_crtc.h>
#include <drm/drm_panel.h>
static DEFINE_MUTEX(panel_lock);
static LIST_HEAD(panel_list);
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 <treding@nvidia.com>");
MODULE_DESCRIPTION("DRM panel infrastructure");
MODULE_LICENSE("GPL and additional rights");
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