1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/**************************************************************************
* Copyright (c) 2009-2011, Intel Corporation.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Benjamin Defnet <benjamin.r.defnet@intel.com>
* Rajesh Poornachandran <rajesh.poornachandran@intel.com>
* Massively reworked
* Alan Cox <alan@linux.intel.com>
*/
#include "gem.h"
#include "power.h"
#include "psb_drv.h"
#include "psb_reg.h"
#include "psb_intel_reg.h"
#include "psb_irq.h"
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
/**
* gma_power_init - initialise power manager
* @dev: our device
*
* Set up for power management tracking of our hardware.
*/
void gma_power_init(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
/* FIXME: Move APM/OSPM base into relevant device code */
dev_priv->apm_base = dev_priv->apm_reg & 0xffff;
dev_priv->ospm_base &= 0xffff;
if (dev_priv->ops->init_pm)
dev_priv->ops->init_pm(dev);
/*
* Runtime pm support is broken atm. So for now unconditionally
* call pm_runtime_get() here and put it again in psb_driver_unload()
*
* To fix this we need to call pm_runtime_get() once for each active
* pipe at boot and then put() / get() for each pipe disable / enable
* so that the device gets runtime suspended when no pipes are active.
* Once this is in place the pm_runtime_get() below should be replaced
* by a pm_runtime_allow() call to undo the pm_runtime_forbid() from
* pci_pm_init().
*/
pm_runtime_get(dev->dev);
dev_priv->pm_initialized = true;
}
/**
* gma_power_uninit - end power manager
* @dev: device to end for
*
* Undo the effects of gma_power_init
*/
void gma_power_uninit(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
if (!dev_priv->pm_initialized)
return;
pm_runtime_put_noidle(dev->dev);
}
/**
* gma_suspend_display - suspend the display logic
* @dev: our DRM device
*
* Suspend the display logic of the graphics interface
*/
static void gma_suspend_display(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
dev_priv->ops->save_regs(dev);
dev_priv->ops->power_down(dev);
}
/**
* gma_resume_display - resume display side logic
* @pdev: PCI device
*
* Resume the display hardware restoring state and enabling
* as necessary.
*/
static void gma_resume_display(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
/* turn on the display power island */
dev_priv->ops->power_up(dev);
PSB_WVDC32(dev_priv->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
pci_write_config_word(pdev, PSB_GMCH_CTRL,
dev_priv->gmch_ctrl | _PSB_GMCH_ENABLED);
/* Rebuild our GTT mappings */
psb_gtt_resume(dev);
psb_gem_mm_resume(dev);
dev_priv->ops->restore_regs(dev);
}
/**
* gma_suspend_pci - suspend PCI side
* @pdev: PCI device
*
* Perform the suspend processing on our PCI device state
*/
static void gma_suspend_pci(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
int bsm, vbt;
pci_save_state(pdev);
pci_read_config_dword(pdev, 0x5C, &bsm);
dev_priv->regs.saveBSM = bsm;
pci_read_config_dword(pdev, 0xFC, &vbt);
dev_priv->regs.saveVBT = vbt;
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
}
/**
* gma_resume_pci - resume helper
* @pdev: our PCI device
*
* Perform the resume processing on our PCI device state - rewrite
* register state and re-enable the PCI device
*/
static int gma_resume_pci(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
pci_write_config_dword(pdev, 0x5c, dev_priv->regs.saveBSM);
pci_write_config_dword(pdev, 0xFC, dev_priv->regs.saveVBT);
return pci_enable_device(pdev);
}
/**
* gma_power_suspend - bus callback for suspend
* @_dev: our device
*
* Called back by the PCI layer during a suspend of the system. We
* perform the necessary shut down steps and save enough state that
* we can undo this when resume is called.
*/
int gma_power_suspend(struct device *_dev)
{
struct pci_dev *pdev = to_pci_dev(_dev);
struct drm_device *dev = pci_get_drvdata(pdev);
gma_irq_uninstall(dev);
gma_suspend_display(dev);
gma_suspend_pci(pdev);
return 0;
}
/**
* gma_power_resume - resume power
* @_dev: our device
*
* Resume the PCI side of the graphics and then the displays
*/
int gma_power_resume(struct device *_dev)
{
struct pci_dev *pdev = to_pci_dev(_dev);
struct drm_device *dev = pci_get_drvdata(pdev);
gma_resume_pci(pdev);
gma_resume_display(pdev);
gma_irq_install(dev);
return 0;
}
/**
* gma_power_begin - begin requiring power
* @dev: our DRM device
* @force_on: true to force power on
*
* Begin an action that requires the display power island is enabled.
* We refcount the islands.
*/
bool gma_power_begin(struct drm_device *dev, bool force_on)
{
if (force_on)
return pm_runtime_resume_and_get(dev->dev) == 0;
else
return pm_runtime_get_if_in_use(dev->dev) == 1;
}
/**
* gma_power_end - end use of power
* @dev: Our DRM device
*
* Indicate that one of our gma_power_begin() requested periods when
* the diplay island power is needed has completed.
*/
void gma_power_end(struct drm_device *dev)
{
pm_runtime_put(dev->dev);
}
|
