diff options
Diffstat (limited to 'linux-core/drm_pm.c')
-rw-r--r-- | linux-core/drm_pm.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/linux-core/drm_pm.c b/linux-core/drm_pm.c new file mode 100644 index 00000000..ea801bda --- /dev/null +++ b/linux-core/drm_pm.c @@ -0,0 +1,126 @@ +/** + * \file drm_pm.h + * Power management support + * + * \author José Fonseca <jrfonseca@tungstengraphics.com> + */ + +/* + * Copyright 2004 Tungsten Graphics, Inc., Cedar Park, Texas. + * All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#define __NO_VERSION__ +#include "drmP.h" + + +#include <linux/device.h> +#include <linux/sysdev.h> + +static int drm_suspend(struct sys_device *sysdev, u32 state) +{ + drm_device_t *dev = (drm_device_t *)sysdev; + + DRM_DEBUG("%s state=%d\n", __FUNCTION__, state); + + if (dev->driver->power) + return dev->driver->power(dev, state); + else + return 0; +} + +static int drm_resume(struct sys_device *sysdev) +{ + drm_device_t *dev = (drm_device_t *)sysdev; + + DRM_DEBUG("%s\n", __FUNCTION__); + + if (dev->driver->power) + return dev->driver->power(dev, 0); + else + return 0; +} + +static struct sysdev_class drm_sysdev_class = { + set_kset_name("drm"), + .resume = drm_resume, + .suspend = drm_suspend, +}; + + +/** + * Initialize the Power Management data. + * + * \param dev DRM device. + * \return zero on success or a negative value on failure. + */ +int drm_pm_setup(drm_device_t *dev) +{ + int error; + + DRM_DEBUG("%s\n", __FUNCTION__); + + dev->sysdev.id = dev->primary.minor; + dev->sysdev.cls = &drm_sysdev_class; + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4) + error = sys_device_register(&dev->sysdev); +#else + error = sysdev_register(&dev->sysdev); +#endif + if(!error) + dev->sysdev_registered = 1; + return error; +} + +/** + * Cleanup the Power Management resources. + * + * \param dev DRM device. + */ +void drm_pm_takedown(drm_device_t *dev) +{ + DRM_DEBUG("%s\n", __FUNCTION__); + + if(dev->sysdev_registered) { +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,4) + sys_device_unregister(&dev->sysdev); +#else + sysdev_unregister(&dev->sysdev); +#endif + dev->sysdev_registered = 0; + } +} + +int drm_pm_init(void) +{ + DRM_DEBUG("%s\n", __FUNCTION__); + + return sysdev_class_register(&drm_sysdev_class); +} + +void drm_pm_cleanup(void) +{ + DRM_DEBUG("%s\n", __FUNCTION__); + + sysdev_class_unregister(&drm_sysdev_class); +} |