Release 4.11 drivers/gpu/drm/gma500/power.c
/**************************************************************************
* 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 "power.h"
#include "psb_drv.h"
#include "psb_reg.h"
#include "psb_intel_reg.h"
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
static struct mutex power_mutex;
/* Serialize power ops */
static spinlock_t power_ctrl_lock;
/* Serialize power claim */
/**
* 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 = dev->dev_private;
/* FIXME: Move APM/OSPM base into relevant device code */
dev_priv->apm_base = dev_priv->apm_reg & 0xffff;
dev_priv->ospm_base &= 0xffff;
dev_priv->display_power = true; /* We start active */
dev_priv->display_count = 0; /* Currently no users */
dev_priv->suspended = false; /* And not suspended */
spin_lock_init(&power_ctrl_lock);
mutex_init(&power_mutex);
if (dev_priv->ops->init_pm)
dev_priv->ops->init_pm(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 78 | 90.70% | 1 | 50.00% |
| Kirill A. Shutemov | 8 | 9.30% | 1 | 50.00% |
| Total | 86 | 100.00% | 2 | 100.00% |
/**
* 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)
{
pm_runtime_disable(&dev->pdev->dev);
pm_runtime_set_suspended(&dev->pdev->dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
/**
* 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 = dev->dev_private;
if (dev_priv->suspended)
return;
dev_priv->ops->save_regs(dev);
dev_priv->ops->power_down(dev);
dev_priv->display_power = false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
/**
* gma_resume_display - resume display side logic
*
* 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 = dev->dev_private;
/* turn on the display power island */
dev_priv->ops->power_up(dev);
dev_priv->suspended = false;
dev_priv->display_power = true;
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);
psb_gtt_restore(dev); /* Rebuild our GTT mappings */
dev_priv->ops->restore_regs(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 85 | 93.41% | 1 | 50.00% |
| Patrik Jakobsson | 6 | 6.59% | 1 | 50.00% |
| Total | 91 | 100.00% | 2 | 100.00% |
/**
* 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 = dev->dev_private;
int bsm, vbt;
if (dev_priv->suspended)
return;
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_read_config_dword(pdev, PSB_PCIx_MSI_ADDR_LOC, &dev_priv->msi_addr);
pci_read_config_dword(pdev, PSB_PCIx_MSI_DATA_LOC, &dev_priv->msi_data);
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
dev_priv->suspended = true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 125 | 100.00% | 2 | 100.00% |
| Total | 125 | 100.00% | 2 | 100.00% |
/**
* gma_resume_pci - resume helper
* @dev: our PCI device
*
* Perform the resume processing on our PCI device state - rewrite
* register state and re-enable the PCI device
*/
static bool gma_resume_pci(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_psb_private *dev_priv = dev->dev_private;
int ret;
if (!dev_priv->suspended)
return true;
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);
/* restoring MSI address and data in PCIx space */
pci_write_config_dword(pdev, PSB_PCIx_MSI_ADDR_LOC, dev_priv->msi_addr);
pci_write_config_dword(pdev, PSB_PCIx_MSI_DATA_LOC, dev_priv->msi_data);
ret = pci_enable_device(pdev);
if (ret != 0)
dev_err(&pdev->dev, "pci_enable failed: %d\n", ret);
else
dev_priv->suspended = false;
return !dev_priv->suspended;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 142 | 100.00% | 2 | 100.00% |
| Total | 142 | 100.00% | 2 | 100.00% |
/**
* gma_power_suspend - bus callback for suspend
* @pdev: our PCI device
* @state: suspend type
*
* 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);
struct drm_psb_private *dev_priv = dev->dev_private;
mutex_lock(&power_mutex);
if (!dev_priv->suspended) {
if (dev_priv->display_count) {
mutex_unlock(&power_mutex);
dev_err(dev->dev, "GPU hardware busy, cannot suspend\n");
return -EBUSY;
}
psb_irq_uninstall(dev);
gma_suspend_display(dev);
gma_suspend_pci(pdev);
}
mutex_unlock(&power_mutex);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 104 | 99.05% | 2 | 66.67% |
| Geliang Tang | 1 | 0.95% | 1 | 33.33% |
| Total | 105 | 100.00% | 3 | 100.00% |
/**
* gma_power_resume - resume power
* @pdev: PCI 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);
mutex_lock(&power_mutex);
gma_resume_pci(pdev);
gma_resume_display(pdev);
psb_irq_preinstall(dev);
psb_irq_postinstall(dev);
mutex_unlock(&power_mutex);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 64 | 98.46% | 1 | 50.00% |
| Geliang Tang | 1 | 1.54% | 1 | 50.00% |
| Total | 65 | 100.00% | 2 | 100.00% |
/**
* gma_power_is_on - returne true if power is on
* @dev: our DRM device
*
* Returns true if the display island power is on at this moment
*/
bool gma_power_is_on(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = dev->dev_private;
return dev_priv->display_power;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
/**
* 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)
{
struct drm_psb_private *dev_priv = dev->dev_private;
int ret;
unsigned long flags;
spin_lock_irqsave(&power_ctrl_lock, flags);
/* Power already on ? */
if (dev_priv->display_power) {
dev_priv->display_count++;
pm_runtime_get(&dev->pdev->dev);
spin_unlock_irqrestore(&power_ctrl_lock, flags);
return true;
}
if (force_on == false)
goto out_false;
/* Ok power up needed */
ret = gma_resume_pci(dev->pdev);
if (ret == 0) {
psb_irq_preinstall(dev);
psb_irq_postinstall(dev);
pm_runtime_get(&dev->pdev->dev);
dev_priv->display_count++;
spin_unlock_irqrestore(&power_ctrl_lock, flags);
return true;
}
out_false:
spin_unlock_irqrestore(&power_ctrl_lock, flags);
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 148 | 100.00% | 1 | 100.00% |
| Total | 148 | 100.00% | 1 | 100.00% |
/**
* 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)
{
struct drm_psb_private *dev_priv = dev->dev_private;
unsigned long flags;
spin_lock_irqsave(&power_ctrl_lock, flags);
dev_priv->display_count--;
WARN_ON(dev_priv->display_count < 0);
spin_unlock_irqrestore(&power_ctrl_lock, flags);
pm_runtime_put(&dev->pdev->dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 63 | 100.00% | 1 | 100.00% |
| Total | 63 | 100.00% | 1 | 100.00% |
int psb_runtime_suspend(struct device *dev)
{
return gma_power_suspend(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
int psb_runtime_resume(struct device *dev)
{
return gma_power_resume(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 16 | 100.00% | 2 | 100.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
int psb_runtime_idle(struct device *dev)
{
struct drm_device *drmdev = pci_get_drvdata(to_pci_dev(dev));
struct drm_psb_private *dev_priv = drmdev->dev_private;
if (dev_priv->display_count)
return 0;
else
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 45 | 100.00% | 1 | 100.00% |
| Total | 45 | 100.00% | 1 | 100.00% |
int gma_power_thaw(struct device *_dev)
{
return gma_power_resume(_dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrik Jakobsson | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
int gma_power_freeze(struct device *_dev)
{
return gma_power_suspend(_dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrik Jakobsson | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
int gma_power_restore(struct device *_dev)
{
return gma_power_resume(_dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrik Jakobsson | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alan Cox | 1032 | 94.16% | 4 | 50.00% |
| Patrik Jakobsson | 54 | 4.93% | 2 | 25.00% |
| Kirill A. Shutemov | 8 | 0.73% | 1 | 12.50% |
| Geliang Tang | 2 | 0.18% | 1 | 12.50% |
| Total | 1096 | 100.00% | 8 | 100.00% |
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