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power.h
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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,
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20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22  * SOFTWARE.
23  *
24  * Authors:
25  * Benjamin Defnet <[email protected]>
26  * Rajesh Poornachandran <[email protected]>
27  * Massively reworked
28  * Alan Cox <[email protected]>
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_*/