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// SPDX-License-Identifier: GPL-2.0-only
/**************************************************************************
* Copyright (c) 2007, Intel Corporation.
*
* Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
**************************************************************************/
#include <linux/spinlock.h>
#include "psb_drv.h"
#include "psb_intel_reg.h"
#include "psb_reg.h"
static void psb_lid_timer_func(struct timer_list *t)
{
struct drm_psb_private *dev_priv = from_timer(dev_priv, t, lid_timer);
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);
timer_setup(lid_timer, psb_lid_timer_func, 0);
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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