82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* GMA500 Backlight Interface
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*
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* Copyright (c) 2009-2011, Intel Corporation.
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*
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* Authors: Eric Knopp
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*/
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#include "psb_drv.h"
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#include "psb_intel_reg.h"
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#include "psb_intel_drv.h"
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#include "intel_bios.h"
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#include "power.h"
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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static void do_gma_backlight_set(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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backlight_update_status(dev_priv->backlight_device);
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}
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#endif
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void gma_backlight_enable(struct drm_device *dev)
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{
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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struct drm_psb_private *dev_priv = dev->dev_private;
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dev_priv->backlight_enabled = true;
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if (dev_priv->backlight_device) {
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dev_priv->backlight_device->props.brightness = dev_priv->backlight_level;
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do_gma_backlight_set(dev);
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}
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#endif
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}
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void gma_backlight_disable(struct drm_device *dev)
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{
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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struct drm_psb_private *dev_priv = dev->dev_private;
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dev_priv->backlight_enabled = false;
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if (dev_priv->backlight_device) {
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dev_priv->backlight_device->props.brightness = 0;
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do_gma_backlight_set(dev);
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}
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#endif
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}
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void gma_backlight_set(struct drm_device *dev, int v)
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{
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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struct drm_psb_private *dev_priv = dev->dev_private;
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dev_priv->backlight_level = v;
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if (dev_priv->backlight_device && dev_priv->backlight_enabled) {
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dev_priv->backlight_device->props.brightness = v;
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do_gma_backlight_set(dev);
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}
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#endif
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}
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int gma_backlight_init(struct drm_device *dev)
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{
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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struct drm_psb_private *dev_priv = dev->dev_private;
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dev_priv->backlight_enabled = true;
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return dev_priv->ops->backlight_init(dev);
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#else
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return 0;
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#endif
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}
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void gma_backlight_exit(struct drm_device *dev)
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{
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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struct drm_psb_private *dev_priv = dev->dev_private;
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if (dev_priv->backlight_device) {
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dev_priv->backlight_device->props.brightness = 0;
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backlight_update_status(dev_priv->backlight_device);
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backlight_device_unregister(dev_priv->backlight_device);
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}
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#endif
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}
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