forked from Minki/linux
888eef2e8c
Currently we do whatever is done during suspend/resume but we might need some more work for hibernation so keep them in separate functions. Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
333 lines
8.9 KiB
C
333 lines
8.9 KiB
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);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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 = container_of(_dev, struct 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;
|
|
}
|
|
|
|
/**
|
|
* 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 = container_of(_dev, struct 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
int psb_runtime_suspend(struct device *dev)
|
|
{
|
|
return gma_power_suspend(dev);
|
|
}
|
|
|
|
int psb_runtime_resume(struct device *dev)
|
|
{
|
|
return gma_power_resume(dev);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
int gma_power_thaw(struct device *_dev)
|
|
{
|
|
return gma_power_resume(_dev);
|
|
}
|
|
|
|
int gma_power_freeze(struct device *_dev)
|
|
{
|
|
return gma_power_suspend(_dev);
|
|
}
|
|
|
|
int gma_power_restore(struct device *_dev)
|
|
{
|
|
return gma_power_resume(_dev);
|
|
}
|