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- /**************************************************************************
- * Copyright (c) 2007, 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: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
- **************************************************************************/
- #include <drm/drmP.h>
- #include "psb_drv.h"
- #include "psb_reg.h"
- #include "psb_intel_reg.h"
- #include <linux/spinlock.h>
- static void psb_lid_timer_func(unsigned long data)
- {
- struct drm_psb_private * dev_priv = (struct drm_psb_private *)data;
- struct drm_device *dev = (struct drm_device *)dev_priv->dev;
- struct timer_list *lid_timer = &dev_priv->lid_timer;
- unsigned long irq_flags;
- u32 __iomem *lid_state = dev_priv->opregion.lid_state;
- u32 pp_status;
- if (readl(lid_state) == dev_priv->lid_last_state)
- goto lid_timer_schedule;
- if ((readl(lid_state)) & 0x01) {
- /*lid state is open*/
- REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | POWER_TARGET_ON);
- do {
- pp_status = REG_READ(PP_STATUS);
- } while ((pp_status & PP_ON) == 0 &&
- (pp_status & PP_SEQUENCE_MASK) != 0);
- if (REG_READ(PP_STATUS) & PP_ON) {
- /*FIXME: should be backlight level before*/
- psb_intel_lvds_set_brightness(dev, 100);
- } else {
- DRM_DEBUG("LVDS panel never powered up");
- return;
- }
- } else {
- psb_intel_lvds_set_brightness(dev, 0);
- REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON);
- do {
- pp_status = REG_READ(PP_STATUS);
- } while ((pp_status & PP_ON) == 0);
- }
- dev_priv->lid_last_state = readl(lid_state);
- lid_timer_schedule:
- spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
- if (!timer_pending(lid_timer)) {
- lid_timer->expires = jiffies + PSB_LID_DELAY;
- add_timer(lid_timer);
- }
- spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
- }
- void psb_lid_timer_init(struct drm_psb_private *dev_priv)
- {
- struct timer_list *lid_timer = &dev_priv->lid_timer;
- unsigned long irq_flags;
- spin_lock_init(&dev_priv->lid_lock);
- spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
- init_timer(lid_timer);
- lid_timer->data = (unsigned long)dev_priv;
- lid_timer->function = psb_lid_timer_func;
- lid_timer->expires = jiffies + PSB_LID_DELAY;
- add_timer(lid_timer);
- spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
- }
- void psb_lid_timer_takedown(struct drm_psb_private *dev_priv)
- {
- del_timer_sync(&dev_priv->lid_timer);
- }
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