95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
|
/*
|
||
|
|
* GMA500 Backlight Interface
|
||
|
|
*
|
||
|
|
* Copyright (c) 2009-2011, Intel Corporation.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms and conditions of the GNU General Public License,
|
||
|
|
* version 2, as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
|
* more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along with
|
||
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
*
|
||
|
|
* Authors: Eric Knopp
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "psb_drv.h"
|
||
|
|
#include "psb_intel_reg.h"
|
||
|
|
#include "psb_intel_drv.h"
|
||
|
|
#include "intel_bios.h"
|
||
|
|
#include "power.h"
|
||
|
|
|
||
|
|
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
|
||
|
|
static void do_gma_backlight_set(struct drm_device *dev)
|
||
|
|
{
|
||
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
||
|
|
backlight_update_status(dev_priv->backlight_device);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void gma_backlight_enable(struct drm_device *dev)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
|
||
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
||
|
|
dev_priv->backlight_enabled = true;
|
||
|
|
if (dev_priv->backlight_device) {
|
||
|
|
dev_priv->backlight_device->props.brightness = dev_priv->backlight_level;
|
||
|
|
do_gma_backlight_set(dev);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
void gma_backlight_disable(struct drm_device *dev)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
|
||
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
||
|
|
dev_priv->backlight_enabled = false;
|
||
|
|
if (dev_priv->backlight_device) {
|
||
|
|
dev_priv->backlight_device->props.brightness = 0;
|
||
|
|
do_gma_backlight_set(dev);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
void gma_backlight_set(struct drm_device *dev, int v)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
|
||
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
||
|
|
dev_priv->backlight_level = v;
|
||
|
|
if (dev_priv->backlight_device && dev_priv->backlight_enabled) {
|
||
|
|
dev_priv->backlight_device->props.brightness = v;
|
||
|
|
do_gma_backlight_set(dev);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
int gma_backlight_init(struct drm_device *dev)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
|
||
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
||
|
|
dev_priv->backlight_enabled = true;
|
||
|
|
return dev_priv->ops->backlight_init(dev);
|
||
|
|
#else
|
||
|
|
return 0;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
void gma_backlight_exit(struct drm_device *dev)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
|
||
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
||
|
|
if (dev_priv->backlight_device) {
|
||
|
|
dev_priv->backlight_device->props.brightness = 0;
|
||
|
|
backlight_update_status(dev_priv->backlight_device);
|
||
|
|
backlight_device_unregister(dev_priv->backlight_device);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|