power.c (ffb1e76f4f32d2b8ea4189df0484980370476395) power.c (f71635e893c3832790484f2e22b8d5825cc6ce1c)
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,

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42/**
43 * gma_power_init - initialise power manager
44 * @dev: our device
45 *
46 * Set up for power management tracking of our hardware.
47 */
48void gma_power_init(struct drm_device *dev)
49{
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,

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42/**
43 * gma_power_init - initialise power manager
44 * @dev: our device
45 *
46 * Set up for power management tracking of our hardware.
47 */
48void gma_power_init(struct drm_device *dev)
49{
50 struct drm_psb_private *dev_priv = dev->dev_private;
50 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
51
52 /* FIXME: Move APM/OSPM base into relevant device code */
53 dev_priv->apm_base = dev_priv->apm_reg & 0xffff;
54 dev_priv->ospm_base &= 0xffff;
55
56 dev_priv->display_power = true; /* We start active */
57 dev_priv->display_count = 0; /* Currently no users */
58 dev_priv->suspended = false; /* And not suspended */

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77/**
78 * gma_suspend_display - suspend the display logic
79 * @dev: our DRM device
80 *
81 * Suspend the display logic of the graphics interface
82 */
83static void gma_suspend_display(struct drm_device *dev)
84{
51
52 /* FIXME: Move APM/OSPM base into relevant device code */
53 dev_priv->apm_base = dev_priv->apm_reg & 0xffff;
54 dev_priv->ospm_base &= 0xffff;
55
56 dev_priv->display_power = true; /* We start active */
57 dev_priv->display_count = 0; /* Currently no users */
58 dev_priv->suspended = false; /* And not suspended */

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77/**
78 * gma_suspend_display - suspend the display logic
79 * @dev: our DRM device
80 *
81 * Suspend the display logic of the graphics interface
82 */
83static void gma_suspend_display(struct drm_device *dev)
84{
85 struct drm_psb_private *dev_priv = dev->dev_private;
85 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
86
87 if (dev_priv->suspended)
88 return;
89 dev_priv->ops->save_regs(dev);
90 dev_priv->ops->power_down(dev);
91 dev_priv->display_power = false;
92}
93
94/**
95 * gma_resume_display - resume display side logic
96 * @pdev: PCI device
97 *
98 * Resume the display hardware restoring state and enabling
99 * as necessary.
100 */
101static void gma_resume_display(struct pci_dev *pdev)
102{
103 struct drm_device *dev = pci_get_drvdata(pdev);
86
87 if (dev_priv->suspended)
88 return;
89 dev_priv->ops->save_regs(dev);
90 dev_priv->ops->power_down(dev);
91 dev_priv->display_power = false;
92}
93
94/**
95 * gma_resume_display - resume display side logic
96 * @pdev: PCI device
97 *
98 * Resume the display hardware restoring state and enabling
99 * as necessary.
100 */
101static void gma_resume_display(struct pci_dev *pdev)
102{
103 struct drm_device *dev = pci_get_drvdata(pdev);
104 struct drm_psb_private *dev_priv = dev->dev_private;
104 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
105
106 /* turn on the display power island */
107 dev_priv->ops->power_up(dev);
108 dev_priv->suspended = false;
109 dev_priv->display_power = true;
110
111 PSB_WVDC32(dev_priv->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
112 pci_write_config_word(pdev, PSB_GMCH_CTRL,

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120 * gma_suspend_pci - suspend PCI side
121 * @pdev: PCI device
122 *
123 * Perform the suspend processing on our PCI device state
124 */
125static void gma_suspend_pci(struct pci_dev *pdev)
126{
127 struct drm_device *dev = pci_get_drvdata(pdev);
105
106 /* turn on the display power island */
107 dev_priv->ops->power_up(dev);
108 dev_priv->suspended = false;
109 dev_priv->display_power = true;
110
111 PSB_WVDC32(dev_priv->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
112 pci_write_config_word(pdev, PSB_GMCH_CTRL,

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120 * gma_suspend_pci - suspend PCI side
121 * @pdev: PCI device
122 *
123 * Perform the suspend processing on our PCI device state
124 */
125static void gma_suspend_pci(struct pci_dev *pdev)
126{
127 struct drm_device *dev = pci_get_drvdata(pdev);
128 struct drm_psb_private *dev_priv = dev->dev_private;
128 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
129 int bsm, vbt;
130
131 if (dev_priv->suspended)
132 return;
133
134 pci_save_state(pdev);
135 pci_read_config_dword(pdev, 0x5C, &bsm);
136 dev_priv->regs.saveBSM = bsm;

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150 * @pdev: our PCI device
151 *
152 * Perform the resume processing on our PCI device state - rewrite
153 * register state and re-enable the PCI device
154 */
155static bool gma_resume_pci(struct pci_dev *pdev)
156{
157 struct drm_device *dev = pci_get_drvdata(pdev);
129 int bsm, vbt;
130
131 if (dev_priv->suspended)
132 return;
133
134 pci_save_state(pdev);
135 pci_read_config_dword(pdev, 0x5C, &bsm);
136 dev_priv->regs.saveBSM = bsm;

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150 * @pdev: our PCI device
151 *
152 * Perform the resume processing on our PCI device state - rewrite
153 * register state and re-enable the PCI device
154 */
155static bool gma_resume_pci(struct pci_dev *pdev)
156{
157 struct drm_device *dev = pci_get_drvdata(pdev);
158 struct drm_psb_private *dev_priv = dev->dev_private;
158 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
159 int ret;
160
161 if (!dev_priv->suspended)
162 return true;
163
164 pci_set_power_state(pdev, PCI_D0);
165 pci_restore_state(pdev);
166 pci_write_config_dword(pdev, 0x5c, dev_priv->regs.saveBSM);

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184 * Called back by the PCI layer during a suspend of the system. We
185 * perform the necessary shut down steps and save enough state that
186 * we can undo this when resume is called.
187 */
188int gma_power_suspend(struct device *_dev)
189{
190 struct pci_dev *pdev = to_pci_dev(_dev);
191 struct drm_device *dev = pci_get_drvdata(pdev);
159 int ret;
160
161 if (!dev_priv->suspended)
162 return true;
163
164 pci_set_power_state(pdev, PCI_D0);
165 pci_restore_state(pdev);
166 pci_write_config_dword(pdev, 0x5c, dev_priv->regs.saveBSM);

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184 * Called back by the PCI layer during a suspend of the system. We
185 * perform the necessary shut down steps and save enough state that
186 * we can undo this when resume is called.
187 */
188int gma_power_suspend(struct device *_dev)
189{
190 struct pci_dev *pdev = to_pci_dev(_dev);
191 struct drm_device *dev = pci_get_drvdata(pdev);
192 struct drm_psb_private *dev_priv = dev->dev_private;
192 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
193
194 mutex_lock(&power_mutex);
195 if (!dev_priv->suspended) {
196 if (dev_priv->display_count) {
197 mutex_unlock(&power_mutex);
198 dev_err(dev->dev, "GPU hardware busy, cannot suspend\n");
199 return -EBUSY;
200 }

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229/**
230 * gma_power_is_on - returne true if power is on
231 * @dev: our DRM device
232 *
233 * Returns true if the display island power is on at this moment
234 */
235bool gma_power_is_on(struct drm_device *dev)
236{
193
194 mutex_lock(&power_mutex);
195 if (!dev_priv->suspended) {
196 if (dev_priv->display_count) {
197 mutex_unlock(&power_mutex);
198 dev_err(dev->dev, "GPU hardware busy, cannot suspend\n");
199 return -EBUSY;
200 }

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229/**
230 * gma_power_is_on - returne true if power is on
231 * @dev: our DRM device
232 *
233 * Returns true if the display island power is on at this moment
234 */
235bool gma_power_is_on(struct drm_device *dev)
236{
237 struct drm_psb_private *dev_priv = dev->dev_private;
237 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
238 return dev_priv->display_power;
239}
240
241/**
242 * gma_power_begin - begin requiring power
243 * @dev: our DRM device
244 * @force_on: true to force power on
245 *
246 * Begin an action that requires the display power island is enabled.
247 * We refcount the islands.
248 */
249bool gma_power_begin(struct drm_device *dev, bool force_on)
250{
238 return dev_priv->display_power;
239}
240
241/**
242 * gma_power_begin - begin requiring power
243 * @dev: our DRM device
244 * @force_on: true to force power on
245 *
246 * Begin an action that requires the display power island is enabled.
247 * We refcount the islands.
248 */
249bool gma_power_begin(struct drm_device *dev, bool force_on)
250{
251 struct drm_psb_private *dev_priv = dev->dev_private;
251 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
252 struct pci_dev *pdev = to_pci_dev(dev->dev);
253 int ret;
254 unsigned long flags;
255
256 spin_lock_irqsave(&power_ctrl_lock, flags);
257 /* Power already on ? */
258 if (dev_priv->display_power) {
259 dev_priv->display_count++;

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283 * gma_power_end - end use of power
284 * @dev: Our DRM device
285 *
286 * Indicate that one of our gma_power_begin() requested periods when
287 * the diplay island power is needed has completed.
288 */
289void gma_power_end(struct drm_device *dev)
290{
252 struct pci_dev *pdev = to_pci_dev(dev->dev);
253 int ret;
254 unsigned long flags;
255
256 spin_lock_irqsave(&power_ctrl_lock, flags);
257 /* Power already on ? */
258 if (dev_priv->display_power) {
259 dev_priv->display_count++;

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283 * gma_power_end - end use of power
284 * @dev: Our DRM device
285 *
286 * Indicate that one of our gma_power_begin() requested periods when
287 * the diplay island power is needed has completed.
288 */
289void gma_power_end(struct drm_device *dev)
290{
291 struct drm_psb_private *dev_priv = dev->dev_private;
291 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
292 unsigned long flags;
293 spin_lock_irqsave(&power_ctrl_lock, flags);
294 dev_priv->display_count--;
295 WARN_ON(dev_priv->display_count < 0);
296 spin_unlock_irqrestore(&power_ctrl_lock, flags);
297 pm_runtime_put(dev->dev);
298}
299

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305int psb_runtime_resume(struct device *dev)
306{
307 return gma_power_resume(dev);
308}
309
310int psb_runtime_idle(struct device *dev)
311{
312 struct drm_device *drmdev = pci_get_drvdata(to_pci_dev(dev));
292 unsigned long flags;
293 spin_lock_irqsave(&power_ctrl_lock, flags);
294 dev_priv->display_count--;
295 WARN_ON(dev_priv->display_count < 0);
296 spin_unlock_irqrestore(&power_ctrl_lock, flags);
297 pm_runtime_put(dev->dev);
298}
299

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305int psb_runtime_resume(struct device *dev)
306{
307 return gma_power_resume(dev);
308}
309
310int psb_runtime_idle(struct device *dev)
311{
312 struct drm_device *drmdev = pci_get_drvdata(to_pci_dev(dev));
313 struct drm_psb_private *dev_priv = drmdev->dev_private;
313 struct drm_psb_private *dev_priv = to_drm_psb_private(drmdev);
314 if (dev_priv->display_count)
315 return 0;
316 else
317 return 1;
318}
319
320int gma_power_thaw(struct device *_dev)
321{

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315 return 0;
316 else
317 return 1;
318}
319
320int gma_power_thaw(struct device *_dev)
321{

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