1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * GMA500 Backlight Interface
 4 *
 5 * Copyright (c) 2009-2011, Intel Corporation.
 6 *
 
 
 
 
 
 
 
 
 
 
 
 
 
 7 * Authors: Eric Knopp
 
 8 */
 9
10#include "psb_drv.h"
11#include "psb_intel_reg.h"
12#include "psb_intel_drv.h"
13#include "intel_bios.h"
14#include "power.h"
15
16#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
17static void do_gma_backlight_set(struct drm_device *dev)
18{
19	struct drm_psb_private *dev_priv = dev->dev_private;
20	backlight_update_status(dev_priv->backlight_device);
21}
22#endif
23
24void gma_backlight_enable(struct drm_device *dev)
25{
26#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
27	struct drm_psb_private *dev_priv = dev->dev_private;
28	dev_priv->backlight_enabled = true;
29	if (dev_priv->backlight_device) {
30		dev_priv->backlight_device->props.brightness = dev_priv->backlight_level;
31		do_gma_backlight_set(dev);
32	}
33#endif	
34}
35
36void gma_backlight_disable(struct drm_device *dev)
37{
38#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
39	struct drm_psb_private *dev_priv = dev->dev_private;
40	dev_priv->backlight_enabled = false;
41	if (dev_priv->backlight_device) {
42		dev_priv->backlight_device->props.brightness = 0;
43		do_gma_backlight_set(dev);
44	}
45#endif	
46}
47
48void gma_backlight_set(struct drm_device *dev, int v)
49{
50#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
51	struct drm_psb_private *dev_priv = dev->dev_private;
52	dev_priv->backlight_level = v;
53	if (dev_priv->backlight_device && dev_priv->backlight_enabled) {
54		dev_priv->backlight_device->props.brightness = v;
55		do_gma_backlight_set(dev);
56	}
57#endif	
58}
59
60int gma_backlight_init(struct drm_device *dev)
61{
62#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
63	struct drm_psb_private *dev_priv = dev->dev_private;
64	dev_priv->backlight_enabled = true;
65	return dev_priv->ops->backlight_init(dev);
66#else
67	return 0;
68#endif
69}
70
71void gma_backlight_exit(struct drm_device *dev)
72{
73#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
74	struct drm_psb_private *dev_priv = dev->dev_private;
75	if (dev_priv->backlight_device) {
76		dev_priv->backlight_device->props.brightness = 0;
77		backlight_update_status(dev_priv->backlight_device);
78		backlight_device_unregister(dev_priv->backlight_device);
79	}
80#endif
81}

 
 1/*
 2 * GMA500 Backlight Interface
 3 *
 4 * Copyright (c) 2009-2011, Intel Corporation.
 5 *
 6 * This program is free software; you can redistribute it and/or modify it
 7 * under the terms and conditions of the GNU General Public License,
 8 * version 2, as published by the Free Software Foundation.
 9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Authors: Eric Knopp
20 *
21 */
22
23#include "psb_drv.h"
24#include "psb_intel_reg.h"
25#include "psb_intel_drv.h"
26#include "intel_bios.h"
27#include "power.h"
28
29#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
30static void do_gma_backlight_set(struct drm_device *dev)
31{
32	struct drm_psb_private *dev_priv = dev->dev_private;
33	backlight_update_status(dev_priv->backlight_device);
34}
35#endif
36
37void gma_backlight_enable(struct drm_device *dev)
38{
39#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
40	struct drm_psb_private *dev_priv = dev->dev_private;
41	dev_priv->backlight_enabled = true;
42	if (dev_priv->backlight_device) {
43		dev_priv->backlight_device->props.brightness = dev_priv->backlight_level;
44		do_gma_backlight_set(dev);
45	}
46#endif	
47}
48
49void gma_backlight_disable(struct drm_device *dev)
50{
51#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
52	struct drm_psb_private *dev_priv = dev->dev_private;
53	dev_priv->backlight_enabled = false;
54	if (dev_priv->backlight_device) {
55		dev_priv->backlight_device->props.brightness = 0;
56		do_gma_backlight_set(dev);
57	}
58#endif	
59}
60
61void gma_backlight_set(struct drm_device *dev, int v)
62{
63#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
64	struct drm_psb_private *dev_priv = dev->dev_private;
65	dev_priv->backlight_level = v;
66	if (dev_priv->backlight_device && dev_priv->backlight_enabled) {
67		dev_priv->backlight_device->props.brightness = v;
68		do_gma_backlight_set(dev);
69	}
70#endif	
71}
72
73int gma_backlight_init(struct drm_device *dev)
74{
75#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
76	struct drm_psb_private *dev_priv = dev->dev_private;
77	dev_priv->backlight_enabled = true;
78	return dev_priv->ops->backlight_init(dev);
79#else
80	return 0;
81#endif
82}
83
84void gma_backlight_exit(struct drm_device *dev)
85{
86#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
87	struct drm_psb_private *dev_priv = dev->dev_private;
88	if (dev_priv->backlight_device) {
89		dev_priv->backlight_device->props.brightness = 0;
90		backlight_update_status(dev_priv->backlight_device);
91		backlight_device_unregister(dev_priv->backlight_device);
92	}
93#endif
94}