#include <linux/mutex.h>
#include <linux/pm_runtime.h>
-static struct mutex power_mutex; /* Serialize power ops */
-static DEFINE_SPINLOCK(power_ctrl_lock); /* Serialize power claim */
-
/**
* gma_power_init - initialise power manager
* @dev: our device
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 */
- mutex_init(&power_mutex);
-
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;
}
/**
*/
void gma_power_uninit(struct drm_device *dev)
{
- pm_runtime_disable(dev->dev);
- pm_runtime_set_suspended(dev->dev);
+ struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+
+ if (!dev_priv->pm_initialized)
+ return;
+
+ pm_runtime_put_noidle(dev->dev);
}
/**
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
- if (dev_priv->suspended)
- return;
dev_priv->ops->save_regs(dev);
dev_priv->ops->power_down(dev);
- dev_priv->display_power = false;
}
/**
/* 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,
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
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_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
-
- dev_priv->suspended = true;
}
/**
* 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)
+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);
- 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);
- 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;
+ return pci_enable_device(pdev);
}
/**
{
struct pci_dev *pdev = to_pci_dev(_dev);
struct drm_device *dev = pci_get_drvdata(pdev);
- struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
- 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;
- }
- gma_irq_uninstall(dev);
- gma_suspend_display(dev);
- gma_suspend_pci(pdev);
- }
- mutex_unlock(&power_mutex);
+ gma_irq_uninstall(dev);
+ gma_suspend_display(dev);
+ gma_suspend_pci(pdev);
return 0;
}
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);
gma_irq_install(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 = to_drm_psb_private(dev);
- return dev_priv->display_power;
-}
-
-/**
* gma_power_begin - begin requiring power
* @dev: our DRM device
* @force_on: true to force power on
*/
bool gma_power_begin(struct drm_device *dev, bool force_on)
{
- struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
- struct pci_dev *pdev = to_pci_dev(dev->dev);
- 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->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(pdev);
- if (ret == 0) {
- gma_irq_preinstall(dev);
- gma_irq_postinstall(dev);
- pm_runtime_get(dev->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;
+ if (force_on)
+ return pm_runtime_resume_and_get(dev->dev) == 0;
+ else
+ return pm_runtime_get_if_in_use(dev->dev) == 1;
}
/**
*/
void gma_power_end(struct drm_device *dev)
{
- struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
- 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->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 = to_drm_psb_private(drmdev);
- if (dev_priv->display_count)
- return 0;
- else
- return 1;
-}
-
int gma_power_thaw(struct device *_dev)
{
return gma_power_resume(_dev);
projects / platform / kernel / linux-rpi.git / commitdiff