| /************************************************************************** | |
| * 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 "gem.h" | |
| #include "power.h" | |
| #include "psb_drv.h" | |
| #include "psb_reg.h" | |
| #include "psb_intel_reg.h" | |
| #include "psb_irq.h" | |
| #include <linux/mutex.h> | |
| #include <linux/pm_runtime.h> | |
| /** | |
| * 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); | |
| } |