drivers/gpu/drm/gma500/power.h

   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
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  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_*/