gma500: Add device framework (bbbb262d) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/gpu/drm/gma500/backlight.c

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		/*
		* GMA500 Backlight Interface
		*
		* Copyright (c) 2009-2011, Intel Corporation.
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope it will be useful, but WITHOUT
		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
		* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
		* more details.
		*
		* You should have received a copy of the GNU General Public License along with
		* this program; if not, write to the Free Software Foundation, Inc.,
		* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
		*
		* Authors: Eric Knopp
		*
		*/

		#include "psb_drv.h"
		#include "psb_intel_reg.h"
		#include "psb_intel_drv.h"
		#include "intel_bios.h"
		#include "power.h"

		int gma_backlight_init(struct drm_device *dev)
		{
		#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
		struct drm_psb_private *dev_priv = dev->dev_private;
		return dev_priv->ops->backlight_init(dev);
		#else
		return 0;
		#endif
		}

		void gma_backlight_exit(struct drm_device *dev)
		{
		#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
		struct drm_psb_private *dev_priv = dev->dev_private;
		if (dev_priv->backlight_device) {
		dev_priv->backlight_device->props.brightness = 0;
		backlight_update_status(dev_priv->backlight_device);
		backlight_device_unregister(dev_priv->backlight_device);
		}
		#endif
		}

drivers/gpu/drm/gma500/power.c

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		/**************************************************************************
		* 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 "power.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; /* Serialize power ops */
		static spinlock_t power_ctrl_lock; /* Serialize power claim */

		/**
		* 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;

		/* FIXME: Move APM/OSPM base into relevant device code */
		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 */
		spin_lock_init(&power_ctrl_lock);
		mutex_init(&power_mutex);

		dev_priv->ops->init_pm(dev);
		}

		/**
		* 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)
		{
		pm_runtime_disable(&dev->pdev->dev);
		pm_runtime_set_suspended(&dev->pdev->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 = dev->dev_private;

		if (dev_priv->suspended)
		return;
		dev_priv->ops->save_regs(dev);
		dev_priv->ops->power_down(dev);
		dev_priv->display_power = false;
		}

		/**
		* 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 */
		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,
		dev_priv->gmch_ctrl \| _PSB_GMCH_ENABLED);
		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 = 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);
		/* restoring 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 device *_dev)
		{
		struct pci_dev *pdev = container_of(_dev, struct pci_dev, dev);
		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 device *_dev)
		{
		struct pci_dev *pdev = container_of(_dev, struct pci_dev, dev);
		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.
		*/
		bool gma_power_begin(struct drm_device *dev, bool force_on)
		{
		struct drm_psb_private *dev_priv = dev->dev_private;
		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->pdev->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(dev->pdev);
		if (ret == 0) {
		psb_irq_preinstall(dev);
		psb_irq_postinstall(dev);
		pm_runtime_get(&dev->pdev->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;
		}

		/**
		* 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;
		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->pdev->dev);
		}

		int psb_runtime_suspend(struct device *dev)
		{
		return gma_power_suspend(dev);
		}

		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;
		}

drivers/gpu/drm/gma500/power.h

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		/**************************************************************************
		* 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>
		*/
		#ifndef _PSB_POWERMGMT_H_
		#define _PSB_POWERMGMT_H_

		#include <linux/pci.h>
		#include <drm/drmP.h>

		void gma_power_init(struct drm_device *dev);
		void gma_power_uninit(struct drm_device *dev);

		/*
		* The kernel bus power management will call these functions
		*/
		int gma_power_suspend(struct device *dev);
		int gma_power_resume(struct device *dev);

		/*
		* These are the functions the driver should use to wrap all hw access
		* (i.e. register reads and writes)
		*/
		bool gma_power_begin(struct drm_device *dev, bool force);
		void gma_power_end(struct drm_device *dev);

		/*
		* Use this function to do an instantaneous check for if the hw is on.
		* Only use this in cases where you know the mutex is already held such
		* as in irq install/uninstall and you need to
		* prevent a deadlock situation. Otherwise use gma_power_begin().
		*/
		bool gma_power_is_on(struct drm_device *dev);

		/*
		* GFX-Runtime PM callbacks
		*/
		int psb_runtime_suspend(struct device *dev);
		int psb_runtime_resume(struct device *dev);
		int psb_runtime_idle(struct device *dev);

		#endif /_PSB_POWERMGMT_H_/