| /************************************************************************** |
| * Copyright (c) 2009, 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 "psb_powermgmt.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; |
| |
| /** |
| * 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; |
| |
| 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 (!IS_MRST(dev)) { |
| /* FIXME: wants further review */ |
| u32 gating = PSB_RSGX32(PSB_CR_CLKGATECTL); |
| /* Disable 2D clock gating */ |
| gating &= ~3; |
| gating |= 1; |
| PSB_WSGX32(gating, PSB_CR_CLKGATECTL); |
| PSB_RSGX32(PSB_CR_CLKGATECTL); |
| } |
| } |
| |
| /** |
| * 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) |
| { |
| mutex_destroy(&power_mutex); |
| pm_runtime_disable(&dev->pdev->dev); |
| pm_runtime_set_suspended(&dev->pdev->dev); |
| } |
| |
| |
| /** |
| * save_display_registers - save registers lost on suspend |
| * @dev: our DRM device |
| * |
| * Save the state we need in order to be able to restore the interface |
| * upon resume from suspend |
| */ |
| static int save_display_registers(struct drm_device *dev) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| struct drm_crtc *crtc; |
| struct drm_connector *connector; |
| |
| /* Display arbitration control + watermarks */ |
| dev_priv->saveDSPARB = PSB_RVDC32(DSPARB); |
| dev_priv->saveDSPFW1 = PSB_RVDC32(DSPFW1); |
| dev_priv->saveDSPFW2 = PSB_RVDC32(DSPFW2); |
| dev_priv->saveDSPFW3 = PSB_RVDC32(DSPFW3); |
| dev_priv->saveDSPFW4 = PSB_RVDC32(DSPFW4); |
| dev_priv->saveDSPFW5 = PSB_RVDC32(DSPFW5); |
| dev_priv->saveDSPFW6 = PSB_RVDC32(DSPFW6); |
| dev_priv->saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT); |
| |
| /* Save crtc and output state */ |
| mutex_lock(&dev->mode_config.mutex); |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| if (drm_helper_crtc_in_use(crtc)) |
| crtc->funcs->save(crtc); |
| } |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| connector->funcs->save(connector); |
| |
| mutex_unlock(&dev->mode_config.mutex); |
| return 0; |
| } |
| |
| /** |
| * restore_display_registers - restore lost register state |
| * @dev: our DRM device |
| * |
| * Restore register state that was lost during suspend and resume. |
| */ |
| static int restore_display_registers(struct drm_device *dev) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| struct drm_crtc *crtc; |
| struct drm_connector *connector; |
| |
| /* Display arbitration + watermarks */ |
| PSB_WVDC32(dev_priv->saveDSPARB, DSPARB); |
| PSB_WVDC32(dev_priv->saveDSPFW1, DSPFW1); |
| PSB_WVDC32(dev_priv->saveDSPFW2, DSPFW2); |
| PSB_WVDC32(dev_priv->saveDSPFW3, DSPFW3); |
| PSB_WVDC32(dev_priv->saveDSPFW4, DSPFW4); |
| PSB_WVDC32(dev_priv->saveDSPFW5, DSPFW5); |
| PSB_WVDC32(dev_priv->saveDSPFW6, DSPFW6); |
| PSB_WVDC32(dev_priv->saveCHICKENBIT, DSPCHICKENBIT); |
| |
| /*make sure VGA plane is off. it initializes to on after reset!*/ |
| PSB_WVDC32(0x80000000, VGACNTRL); |
| |
| mutex_lock(&dev->mode_config.mutex); |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) |
| if (drm_helper_crtc_in_use(crtc)) |
| crtc->funcs->restore(crtc); |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| connector->funcs->restore(connector); |
| |
| mutex_unlock(&dev->mode_config.mutex); |
| return 0; |
| } |
| |
| /** |
| * power_down - power down the display island |
| * @dev: our DRM device |
| * |
| * Power down the display interface of our device |
| */ |
| static void power_down(struct drm_device *dev) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| u32 pwr_mask ; |
| u32 pwr_sts; |
| |
| if (IS_MRST(dev)) { |
| pwr_mask = PSB_PWRGT_DISPLAY_MASK; |
| outl(pwr_mask, dev_priv->ospm_base + PSB_PM_SSC); |
| |
| while (true) { |
| pwr_sts = inl(dev_priv->ospm_base + PSB_PM_SSS); |
| if ((pwr_sts & pwr_mask) == pwr_mask) |
| break; |
| else |
| udelay(10); |
| } |
| dev_priv->display_power = false; |
| } |
| } |
| |
| |
| /** |
| * 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; |
| int pp_stat; |
| |
| if (dev_priv->suspended) |
| return; |
| |
| save_display_registers(dev); |
| |
| if (dev_priv->iLVDS_enable) { |
| /*shutdown the panel*/ |
| PSB_WVDC32(0, PP_CONTROL); |
| |
| do { |
| pp_stat = PSB_RVDC32(PP_STATUS); |
| } while (pp_stat & 0x80000000); |
| |
| /*turn off the plane*/ |
| PSB_WVDC32(0x58000000, DSPACNTR); |
| PSB_WVDC32(0, DSPASURF);/*trigger the plane disable*/ |
| /*wait ~4 ticks*/ |
| msleep(4); |
| |
| /*turn off pipe*/ |
| PSB_WVDC32(0x0, PIPEACONF); |
| /*wait ~8 ticks*/ |
| msleep(8); |
| |
| /*turn off PLLs*/ |
| PSB_WVDC32(0, MRST_DPLL_A); |
| } else { |
| PSB_WVDC32(DPI_SHUT_DOWN, DPI_CONTROL_REG); |
| PSB_WVDC32(0x0, PIPEACONF); |
| PSB_WVDC32(0x2faf0000, BLC_PWM_CTL); |
| while (REG_READ(0x70008) & 0x40000000); |
| while ((PSB_RVDC32(GEN_FIFO_STAT_REG) & DPI_FIFO_EMPTY) |
| != DPI_FIFO_EMPTY); |
| PSB_WVDC32(0, DEVICE_READY_REG); |
| /* turn off panel power */ |
| } |
| power_down(dev); |
| } |
| |
| /* |
| * power_up |
| * |
| * Description: Restore power to the specified island(s) (powergating) |
| */ |
| static void power_up(struct drm_device *dev) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| u32 pwr_mask = PSB_PWRGT_DISPLAY_MASK; |
| u32 pwr_sts, pwr_cnt; |
| |
| if (IS_MRST(dev)) { |
| pwr_cnt = inl(dev_priv->ospm_base + PSB_PM_SSC); |
| pwr_cnt &= ~pwr_mask; |
| outl(pwr_cnt, (dev_priv->ospm_base + PSB_PM_SSC)); |
| |
| while (true) { |
| pwr_sts = inl(dev_priv->ospm_base + PSB_PM_SSS); |
| if ((pwr_sts & pwr_mask) == 0) |
| break; |
| else |
| udelay(10); |
| } |
| } |
| dev_priv->suspended = false; |
| dev_priv->display_power = true; |
| } |
| |
| /** |
| * 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; |
| |
| if (dev_priv->suspended == false) |
| return; |
| |
| /* turn on the display power island */ |
| 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); |
| |
| /* Don't reinitialize the GTT as it is unnecessary. The gtt is |
| * stored in memory so it will automatically be restored. All |
| * we need to do is restore the PGETBL_CTL which we already do |
| * above. |
| */ |
| /*psb_gtt_init(dev_priv->pg, 1);*/ |
| |
| restore_display_registers(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->saveBSM = bsm; |
| pci_read_config_dword(pdev, 0xFC, &vbt); |
| dev_priv->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->saveBSM); |
| pci_write_config_dword(pdev, 0xFC, dev_priv->saveVBT); |
| /* retoring 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 pci_dev *pdev, pm_message_t state) |
| { |
| 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); |
| 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 pci_dev *pdev) |
| { |
| 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. |
| * |
| * FIXME: locking |
| */ |
| bool gma_power_begin(struct drm_device *dev, bool force_on) |
| { |
| struct drm_psb_private *dev_priv = dev->dev_private; |
| int ret; |
| |
| /* Power already on ? */ |
| if (dev_priv->display_power) { |
| dev_priv->display_count++; |
| pm_runtime_get(&dev->pdev->dev); |
| return true; |
| } |
| if (force_on == false) |
| return 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++; |
| return true; |
| } |
| 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; |
| dev_priv->display_count--; |
| WARN_ON(dev_priv->display_count < 0); |
| pm_runtime_put(&dev->pdev->dev); |
| } |
| |
| int psb_runtime_suspend(struct device *dev) |
| { |
| static pm_message_t dummy; |
| return gma_power_suspend(to_pci_dev(dev), dummy); |
| } |
| |
| int psb_runtime_resume(struct device *dev) |
| { |
| return 0; |
| } |
| |
| 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; |
| } |
| |