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
26static 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 __iomem *lid_state = dev_priv->opregion.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			 (pp_status & PP_SEQUENCE_MASK) != 0);
45
46		if (REG_READ(PP_STATUS) & PP_ON) {
47			/*FIXME: should be backlight level before*/
48			psb_intel_lvds_set_brightness(dev, 100);
49		} else {
50			DRM_DEBUG("LVDS panel never powered up");
51			return;
52		}
53	} else {
54		psb_intel_lvds_set_brightness(dev, 0);
55
56		REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & ~POWER_TARGET_ON);
57		do {
58			pp_status = REG_READ(PP_STATUS);
59		} while ((pp_status & PP_ON) == 0);
60	}
61	dev_priv->lid_last_state =  readl(lid_state);
62
63lid_timer_schedule:
64	spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
65	if (!timer_pending(lid_timer)) {
66		lid_timer->expires = jiffies + PSB_LID_DELAY;
67		add_timer(lid_timer);
68	}
69	spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
70}
71
72void psb_lid_timer_init(struct drm_psb_private *dev_priv)
73{
74	struct timer_list *lid_timer = &dev_priv->lid_timer;
75	unsigned long irq_flags;
76
77	spin_lock_init(&dev_priv->lid_lock);
78	spin_lock_irqsave(&dev_priv->lid_lock, irq_flags);
79
80	init_timer(lid_timer);
81
82	lid_timer->data = (unsigned long)dev_priv;
83	lid_timer->function = psb_lid_timer_func;
84	lid_timer->expires = jiffies + PSB_LID_DELAY;
85
86	add_timer(lid_timer);
87	spin_unlock_irqrestore(&dev_priv->lid_lock, irq_flags);
88}
89
90void psb_lid_timer_takedown(struct drm_psb_private *dev_priv)
91{
92	del_timer_sync(&dev_priv->lid_timer);
93}
94
95