LXR linux/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
  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
  35struct device;
  36struct drm_device;
  37
  38void gma_power_init(struct drm_device *dev);
  39void gma_power_uninit(struct drm_device *dev);
  40
  41/*
  42 * The kernel bus power management  will call these functions
  43 */
  44int gma_power_suspend(struct device *dev);
  45int gma_power_resume(struct device *dev);
  46int gma_power_thaw(struct device *dev);
  47int gma_power_freeze(struct device *dev);
  48int 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 */
  54bool gma_power_begin(struct drm_device *dev, bool force);
  55void 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 */
  63bool gma_power_is_on(struct drm_device *dev);
  64
  65/*
  66 * GFX-Runtime PM callbacks
  67 */
  68int psb_runtime_suspend(struct device *dev);
  69int psb_runtime_resume(struct device *dev);
  70int psb_runtime_idle(struct device *dev);
  71
  72#endif /*_PSB_POWERMGMT_H_*/
  73