1 /**************************************************************************
2 * Copyright (c) 2007, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
18 **************************************************************************/
19
20 #include <drm/drmP.h>
21 #include "psb_drv.h"
22 #include "psb_reg.h"
23 #include "psb_intel_reg.h"
24 #include <linux/spinlock.h>
25
psb_lid_timer_func(unsigned long data)26 static void psb_lid_timer_func(unsigned long data)
27 {
28 struct drm_psb_private * dev_priv = (struct drm_psb_private *)data;
29 struct drm_device *dev = (struct drm_device *)dev_priv->dev;
30 struct timer_list *lid_timer = &dev_priv->lid_timer;
31 unsigned long irq_flags;
32 u32 *lid_state = dev_priv->lid_state;
33 u32 pp_status;
34
35 if (readl(lid_state) == dev_priv->lid_last_state)
36 goto lid_timer_schedule;
37
38 if ((readl(lid_state)) & 0x01) {
39 /*lid state is open*/
40 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | POWER_TARGET_ON);
41 do {
42 pp_status = REG_READ(PP_STATUS);
43 } while ((pp_status & PP_ON) == 0);
44
45 /*FIXME: should be backlight level before*/
46 psb_intel_lvds_set_brightness(dev, 100);
47 } else {
48 psb_intel_lvds_set_brightness(dev, 0);
49
50 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON);
51 do {
52 pp_status = REG_READ(PP_STATUS);
53 } while ((pp_status & PP_ON) == 0);
54 }
55 dev_priv->lid_last_state = readl(lid_state);
56
57 lid_timer_schedule:
58 spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
59 if (!timer_pending(lid_timer)) {
60 lid_timer->expires = jiffies + PSB_LID_DELAY;
61 add_timer(lid_timer);
62 }
63 spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
64 }
65
psb_lid_timer_init(struct drm_psb_private * dev_priv)66 void psb_lid_timer_init(struct drm_psb_private *dev_priv)
67 {
68 struct timer_list *lid_timer = &dev_priv->lid_timer;
69 unsigned long irq_flags;
70
71 spin_lock_init(&dev_priv->lid_lock);
72 spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
73
74 init_timer(lid_timer);
75
76 lid_timer->data = (unsigned long)dev_priv;
77 lid_timer->function = psb_lid_timer_func;
78 lid_timer->expires = jiffies + PSB_LID_DELAY;
79
80 add_timer(lid_timer);
81 spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
82 }
83
psb_lid_timer_takedown(struct drm_psb_private * dev_priv)84 void psb_lid_timer_takedown(struct drm_psb_private *dev_priv)
85 {
86 del_timer_sync(&dev_priv->lid_timer);
87 }
88
89