1 /************************************************************************** 2 * Copyright (c) 2009-2011, Intel Corporation. 3 * All Rights Reserved. 4 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 * Authors: 25 * Benjamin Defnet <benjamin.r.defnet@intel.com> 26 * Rajesh Poornachandran <rajesh.poornachandran@intel.com> 27 * Massively reworked 28 * Alan Cox <alan@linux.intel.com> 29 */ 30 #ifndef _PSB_POWERMGMT_H_ 31 #define _PSB_POWERMGMT_H_ 32 33 #include <linux/pci.h> 34 35 struct device; 36 struct drm_device; 37 38 void gma_power_init(struct drm_device *dev); 39 void gma_power_uninit(struct drm_device *dev); 40 41 /* 42 * The kernel bus power management will call these functions 43 */ 44 int gma_power_suspend(struct device *dev); 45 int gma_power_resume(struct device *dev); 46 int gma_power_thaw(struct device *dev); 47 int gma_power_freeze(struct device *dev); 48 int gma_power_restore(struct device *_dev); 49 50 /* 51 * These are the functions the driver should use to wrap all hw access 52 * (i.e. register reads and writes) 53 */ 54 bool gma_power_begin(struct drm_device *dev, bool force); 55 void gma_power_end(struct drm_device *dev); 56 57 /* 58 * Use this function to do an instantaneous check for if the hw is on. 59 * Only use this in cases where you know the mutex is already held such 60 * as in irq install/uninstall and you need to 61 * prevent a deadlock situation. Otherwise use gma_power_begin(). 62 */ 63 bool gma_power_is_on(struct drm_device *dev); 64 65 /* 66 * GFX-Runtime PM callbacks 67 */ 68 int psb_runtime_suspend(struct device *dev); 69 int psb_runtime_resume(struct device *dev); 70 int psb_runtime_idle(struct device *dev); 71 72 #endif /*_PSB_POWERMGMT_H_*/ 73