1 /* 2 * GMA500 Backlight Interface 3 * 4 * Copyright (c) 2009-2011, Intel Corporation. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Authors: Eric Knopp 20 * 21 */ 22 23 #include "psb_drv.h" 24 #include "psb_intel_reg.h" 25 #include "psb_intel_drv.h" 26 #include "intel_bios.h" 27 #include "power.h" 28 29 int gma_backlight_init(struct drm_device *dev) 30 { 31 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE 32 struct drm_psb_private *dev_priv = dev->dev_private; 33 return dev_priv->ops->backlight_init(dev); 34 #else 35 return 0; 36 #endif 37 } 38 39 void gma_backlight_exit(struct drm_device *dev) 40 { 41 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE 42 struct drm_psb_private *dev_priv = dev->dev_private; 43 if (dev_priv->backlight_device) { 44 dev_priv->backlight_device->props.brightness = 0; 45 backlight_update_status(dev_priv->backlight_device); 46 backlight_device_unregister(dev_priv->backlight_device); 47 } 48 #endif 49 } 50