1 // SPDX-License-Identifier: GPL-2.0-only
2 /**************************************************************************
3 * Copyright (c) 2007, Intel Corporation.
4 *
5 * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
6 **************************************************************************/
7
8 #include <linux/spinlock.h>
9
10 #include "psb_drv.h"
11 #include "psb_intel_reg.h"
12 #include "psb_reg.h"
13
psb_lid_timer_func(struct timer_list * t)14 static void psb_lid_timer_func(struct timer_list *t)
15 {
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;
21 u32 pp_status;
22
23 if (readl(lid_state) == dev_priv->lid_last_state)
24 goto lid_timer_schedule;
25
26 if ((readl(lid_state)) & 0x01) {
27 /*lid state is open*/
28 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | POWER_TARGET_ON);
29 do {
30 pp_status = REG_READ(PP_STATUS);
31 } while ((pp_status & PP_ON) == 0 &&
32 (pp_status & PP_SEQUENCE_MASK) != 0);
33
34 if (REG_READ(PP_STATUS) & PP_ON) {
35 /*FIXME: should be backlight level before*/
36 psb_intel_lvds_set_brightness(dev, 100);
37 } else {
38 DRM_DEBUG("LVDS panel never powered up");
39 return;
40 }
41 } else {
42 psb_intel_lvds_set_brightness(dev, 0);
43
44 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON);
45 do {
46 pp_status = REG_READ(PP_STATUS);
47 } while ((pp_status & PP_ON) == 0);
48 }
49 dev_priv->lid_last_state = readl(lid_state);
50
51 lid_timer_schedule:
52 spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
53 if (!timer_pending(lid_timer)) {
54 lid_timer->expires = jiffies + PSB_LID_DELAY;
55 add_timer(lid_timer);
56 }
57 spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
58 }
59
psb_lid_timer_init(struct drm_psb_private * dev_priv)60 void psb_lid_timer_init(struct drm_psb_private *dev_priv)
61 {
62 struct timer_list *lid_timer = &dev_priv->lid_timer;
63 unsigned long irq_flags;
64
65 spin_lock_init(&dev_priv->lid_lock);
66 spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
67
68 timer_setup(lid_timer, psb_lid_timer_func, 0);
69
70 lid_timer->expires = jiffies + PSB_LID_DELAY;
71
72 add_timer(lid_timer);
73 spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
74 }
75
psb_lid_timer_takedown(struct drm_psb_private * dev_priv)76 void psb_lid_timer_takedown(struct drm_psb_private *dev_priv)
77 {
78 del_timer_sync(&dev_priv->lid_timer);
79 }
80
81