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
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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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 #include <drm/drmP.h>
  35
  36 void gma_power_init(struct drm_device *dev);
  37 void gma_power_uninit(struct drm_device *dev);
  38
  39 /*
  40  * The kernel bus power management  will call these functions
  41  */
  42 int gma_power_suspend(struct device *dev);
  43 int gma_power_resume(struct device *dev);
  44
  45 /*
  46  * These are the functions the driver should use to wrap all hw access
  47  * (i.e. register reads and writes)
  48  */
  49 bool gma_power_begin(struct drm_device *dev, bool force);
  50 void gma_power_end(struct drm_device *dev);
  51
  52 /*
  53  * Use this function to do an instantaneous check for if the hw is on.
  54  * Only use this in cases where you know the mutex is already held such
  55  * as in irq install/uninstall and you need to
  56  * prevent a deadlock situation.  Otherwise use gma_power_begin().
  57  */
  58 bool gma_power_is_on(struct drm_device *dev);
  59
  60 /*
  61  * GFX-Runtime PM callbacks
  62  */
  63 int psb_runtime_suspend(struct device *dev);
  64 int psb_runtime_resume(struct device *dev);
  65 int psb_runtime_idle(struct device *dev);
  66
  67 #endif /*_PSB_POWERMGMT_H_*/