diff options
Diffstat (limited to 'drivers/gpu/drm/gma500/power.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/power.c | 158 |
1 files changed, 30 insertions, 128 deletions
diff --git a/drivers/gpu/drm/gma500/power.c b/drivers/gpu/drm/gma500/power.c index 66873085d450..186af29bea6f 100644 --- a/drivers/gpu/drm/gma500/power.c +++ b/drivers/gpu/drm/gma500/power.c @@ -37,9 +37,6 @@ #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 @@ -54,13 +51,23 @@ void gma_power_init(struct drm_device *dev) 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; } /** @@ -71,8 +78,12 @@ void gma_power_init(struct drm_device *dev) */ 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); } /** @@ -85,11 +96,8 @@ static void gma_suspend_display(struct drm_device *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; } /** @@ -106,8 +114,6 @@ static void gma_resume_display(struct pci_dev *pdev) /* 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, @@ -131,9 +137,6 @@ static void gma_suspend_pci(struct pci_dev *pdev) 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; @@ -142,8 +145,6 @@ static void gma_suspend_pci(struct pci_dev *pdev) pci_disable_device(pdev); pci_set_power_state(pdev, PCI_D3hot); - - dev_priv->suspended = true; } /** @@ -153,26 +154,17 @@ static void gma_suspend_pci(struct pci_dev *pdev) * 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); } /** @@ -187,20 +179,10 @@ 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 = 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; } @@ -215,27 +197,13 @@ 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); 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 @@ -245,35 +213,10 @@ bool gma_power_is_on(struct drm_device *dev) */ 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; } /** @@ -285,46 +228,5 @@ out_false: */ 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); } - -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 = 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); -} - -int gma_power_freeze(struct device *_dev) -{ - return gma_power_suspend(_dev); -} - -int gma_power_restore(struct device *_dev) -{ - return gma_power_resume(_dev); -} |