127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
/**
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* \file drm_pm.h
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* Power management support
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*
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* \author José Fonseca <jrfonseca@tungstengraphics.com>
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*/
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/*
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* Copyright 2004 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define __NO_VERSION__
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#include "drmP.h"
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#include <linux/device.h>
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#include <linux/sysdev.h>
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static int drm_suspend(struct sys_device *sysdev, u32 state)
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{
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drm_device_t *dev = (drm_device_t *)sysdev;
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DRM_DEBUG("%s state=%d\n", __FUNCTION__, state);
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if (dev->driver->power)
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return dev->driver->power(dev, state);
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else
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return 0;
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}
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static int drm_resume(struct sys_device *sysdev)
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{
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drm_device_t *dev = (drm_device_t *)sysdev;
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DRM_DEBUG("%s\n", __FUNCTION__);
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if (dev->driver->power)
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return dev->driver->power(dev, 0);
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else
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return 0;
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}
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static struct sysdev_class drm_sysdev_class = {
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set_kset_name("drm"),
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.resume = drm_resume,
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.suspend = drm_suspend,
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};
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/**
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* Initialize the Power Management data.
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*
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* \param dev DRM device.
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* \return zero on success or a negative value on failure.
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*/
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int drm_pm_setup(drm_device_t *dev)
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{
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int error;
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DRM_DEBUG("%s\n", __FUNCTION__);
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dev->sysdev.id = dev->primary.minor;
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dev->sysdev.cls = &drm_sysdev_class;
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
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error = sys_device_register(&dev->sysdev);
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#else
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error = sysdev_register(&dev->sysdev);
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#endif
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if(!error)
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dev->sysdev_registered = 1;
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return error;
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}
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/**
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* Cleanup the Power Management resources.
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*
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* \param dev DRM device.
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*/
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void drm_pm_takedown(drm_device_t *dev)
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{
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DRM_DEBUG("%s\n", __FUNCTION__);
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if(dev->sysdev_registered) {
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4)
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sys_device_unregister(&dev->sysdev);
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#else
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sysdev_unregister(&dev->sysdev);
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#endif
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dev->sysdev_registered = 0;
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}
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}
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int drm_pm_init(void)
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{
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DRM_DEBUG("%s\n", __FUNCTION__);
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return sysdev_class_register(&drm_sysdev_class);
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}
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void drm_pm_cleanup(void)
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{
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DRM_DEBUG("%s\n", __FUNCTION__);
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sysdev_class_unregister(&drm_sysdev_class);
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}
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