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89c78134 AC |
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 | ||
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; | |
25933dde | 32 | u32 __iomem *lid_state = dev_priv->opregion.lid_state; |
89c78134 AC |
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); | |
ac0a5dd6 AC |
43 | } while ((pp_status & PP_ON) == 0 && |
44 | (pp_status & PP_SEQUENCE_MASK) != 0); | |
89c78134 | 45 | |
ac0a5dd6 AC |
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 | } | |
89c78134 AC |
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 | } | |
89c78134 AC |
61 | dev_priv->lid_last_state = readl(lid_state); |
62 | ||
63 | lid_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 | ||
72 | void 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 | ||
90 | void psb_lid_timer_takedown(struct drm_psb_private *dev_priv) | |
91 | { | |
92 | del_timer_sync(&dev_priv->lid_timer); | |
93 | } | |
94 |