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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/gpu/drm/gma500/psb_lid.c
1 /**************************************************************************
2 * Copyright (c) 2007, Intel Corporation.
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.
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
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.
17 * Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
18 **************************************************************************/
23 #include "psb_intel_reg.h"
24 #include <linux/spinlock.h>
26 static void psb_lid_timer_func(unsigned long data
)
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
;
35 if (readl(lid_state
) == dev_priv
->lid_last_state
)
36 goto lid_timer_schedule
;
38 if ((readl(lid_state
)) & 0x01) {
40 REG_WRITE(PP_CONTROL
, REG_READ(PP_CONTROL
) | POWER_TARGET_ON
);
42 pp_status
= REG_READ(PP_STATUS
);
43 } while ((pp_status
& PP_ON
) == 0 &&
44 (pp_status
& PP_SEQUENCE_MASK
) != 0);
46 if (REG_READ(PP_STATUS
) & PP_ON
) {
47 /*FIXME: should be backlight level before*/
48 psb_intel_lvds_set_brightness(dev
, 100);
50 DRM_DEBUG("LVDS panel never powered up");
54 psb_intel_lvds_set_brightness(dev
, 0);
56 REG_WRITE(PP_CONTROL
, REG_READ(PP_CONTROL
) & ~POWER_TARGET_ON
);
58 pp_status
= REG_READ(PP_STATUS
);
59 } while ((pp_status
& PP_ON
) == 0);
61 dev_priv
->lid_last_state
= readl(lid_state
);
64 spin_lock_irqsave(&dev_priv
->lid_lock
, irq_flags
);
65 if (!timer_pending(lid_timer
)) {
66 lid_timer
->expires
= jiffies
+ PSB_LID_DELAY
;
69 spin_unlock_irqrestore(&dev_priv
->lid_lock
, irq_flags
);
72 void psb_lid_timer_init(struct drm_psb_private
*dev_priv
)
74 struct timer_list
*lid_timer
= &dev_priv
->lid_timer
;
75 unsigned long irq_flags
;
77 spin_lock_init(&dev_priv
->lid_lock
);
78 spin_lock_irqsave(&dev_priv
->lid_lock
, irq_flags
);
80 init_timer(lid_timer
);
82 lid_timer
->data
= (unsigned long)dev_priv
;
83 lid_timer
->function
= psb_lid_timer_func
;
84 lid_timer
->expires
= jiffies
+ PSB_LID_DELAY
;
87 spin_unlock_irqrestore(&dev_priv
->lid_lock
, irq_flags
);
90 void psb_lid_timer_takedown(struct drm_psb_private
*dev_priv
)
92 del_timer_sync(&dev_priv
->lid_timer
);