1 // SPDX-License-Identifier: GPL-2.0-only
2 /**************************************************************************
3 * Copyright (c) 2007, Intel Corporation.
5 * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
6 **************************************************************************/
8 #include <linux/spinlock.h>
11 #include "psb_intel_reg.h"
14 static void psb_lid_timer_func(struct timer_list *t)
16 struct drm_psb_private *dev_priv = from_timer(dev_priv, t, lid_timer);
17 struct drm_device *dev = (struct drm_device *)dev_priv->dev;
18 struct timer_list *lid_timer = &dev_priv->lid_timer;
19 unsigned long irq_flags;
20 u32 __iomem *lid_state = dev_priv->opregion.lid_state;
23 if (readl(lid_state) == dev_priv->lid_last_state)
24 goto lid_timer_schedule;
26 if ((readl(lid_state)) & 0x01) {
28 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | POWER_TARGET_ON);
30 pp_status = REG_READ(PP_STATUS);
31 } while ((pp_status & PP_ON) == 0 &&
32 (pp_status & PP_SEQUENCE_MASK) != 0);
34 if (REG_READ(PP_STATUS) & PP_ON) {
35 /*FIXME: should be backlight level before*/
36 psb_intel_lvds_set_brightness(dev, 100);
38 DRM_DEBUG("LVDS panel never powered up");
42 psb_intel_lvds_set_brightness(dev, 0);
44 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON);
46 pp_status = REG_READ(PP_STATUS);
47 } while ((pp_status & PP_ON) == 0);
49 dev_priv->lid_last_state = readl(lid_state);
52 spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
53 if (!timer_pending(lid_timer)) {
54 lid_timer->expires = jiffies + PSB_LID_DELAY;
57 spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
60 void psb_lid_timer_init(struct drm_psb_private *dev_priv)
62 struct timer_list *lid_timer = &dev_priv->lid_timer;
63 unsigned long irq_flags;
65 spin_lock_init(&dev_priv->lid_lock);
66 spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
68 timer_setup(lid_timer, psb_lid_timer_func, 0);
70 lid_timer->expires = jiffies + PSB_LID_DELAY;
73 spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
76 void psb_lid_timer_takedown(struct drm_psb_private *dev_priv)
78 del_timer_sync(&dev_priv->lid_timer);