/************************************************************************** * 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 * Rajesh Poornachandran * Massively reworked * Alan Cox */ #include "gem.h" #include "power.h" #include "psb_drv.h" #include "psb_reg.h" #include "psb_intel_reg.h" #include "psb_irq.h" #include #include /** * 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 = to_drm_psb_private(dev); /* FIXME: Move APM/OSPM base into relevant device code */ dev_priv->apm_base = dev_priv->apm_reg & 0xffff; dev_priv->ospm_base &= 0xffff; 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; } /** * 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) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); if (!dev_priv->pm_initialized) return; pm_runtime_put_noidle(dev->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 = to_drm_psb_private(dev); dev_priv->ops->save_regs(dev); dev_priv->ops->power_down(dev); } /** * gma_resume_display - resume display side logic * @pdev: PCI device * * 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 = to_drm_psb_private(dev); /* turn on the display power island */ dev_priv->ops->power_up(dev); 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); /* Rebuild our GTT mappings */ psb_gtt_resume(dev); psb_gem_mm_resume(dev); 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 = to_drm_psb_private(dev); int bsm, vbt; 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_disable_device(pdev); pci_set_power_state(pdev, PCI_D3hot); } /** * gma_resume_pci - resume helper * @pdev: our PCI device * * Perform the resume processing on our PCI device state - rewrite * register state and re-enable the PCI device */ 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); 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); return pci_enable_device(pdev); } /** * gma_power_suspend - bus callback for suspend * @_dev: our device * * 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); gma_irq_uninstall(dev); gma_suspend_display(dev); gma_suspend_pci(pdev); return 0; } /** * gma_power_resume - resume power * @_dev: our 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); gma_resume_pci(pdev); gma_resume_display(pdev); gma_irq_install(dev); return 0; } /** * 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) { if (force_on) return pm_runtime_resume_and_get(dev->dev) == 0; else return pm_runtime_get_if_in_use(dev->dev) == 1; } /** * 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) { pm_runtime_put(dev->dev); }