a61127c213
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 111 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.567572064@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
82 lines
2 KiB
C
82 lines
2 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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