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1 | /* |
2 | * Copyright (C) 2009 Red Hat <mjg@redhat.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining | |
5 | * a copy of this software and associated documentation files (the | |
6 | * "Software"), to deal in the Software without restriction, including | |
7 | * without limitation the rights to use, copy, modify, merge, publish, | |
8 | * distribute, sublicense, and/or sell copies of the Software, and to | |
9 | * permit persons to whom the Software is furnished to do so, subject to | |
10 | * the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice (including the | |
13 | * next paragraph) shall be included in all copies or substantial | |
14 | * portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
17 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
19 | * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE | |
20 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
21 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | |
22 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
23 | * | |
24 | */ | |
25 | ||
26 | /* | |
27 | * Authors: | |
28 | * Matthew Garrett <mjg@redhat.com> | |
29 | * | |
30 | * Register locations derived from NVClock by Roderick Colenbrander | |
31 | */ | |
32 | ||
33 | #include <linux/backlight.h> | |
34 | ||
35 | #include "drmP.h" | |
36 | #include "nouveau_drv.h" | |
37 | #include "nouveau_drm.h" | |
38 | #include "nouveau_reg.h" | |
39 | ||
40 | static int nv40_get_intensity(struct backlight_device *bd) | |
41 | { | |
42 | struct drm_device *dev = bl_get_data(bd); | |
43 | int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK) | |
44 | >> 16; | |
45 | ||
46 | return val; | |
47 | } | |
48 | ||
49 | static int nv40_set_intensity(struct backlight_device *bd) | |
50 | { | |
51 | struct drm_device *dev = bl_get_data(bd); | |
52 | int val = bd->props.brightness; | |
53 | int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT); | |
54 | ||
55 | nv_wr32(dev, NV40_PMC_BACKLIGHT, | |
56 | (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK)); | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static struct backlight_ops nv40_bl_ops = { | |
62 | .options = BL_CORE_SUSPENDRESUME, | |
63 | .get_brightness = nv40_get_intensity, | |
64 | .update_status = nv40_set_intensity, | |
65 | }; | |
66 | ||
67 | static int nv50_get_intensity(struct backlight_device *bd) | |
68 | { | |
69 | struct drm_device *dev = bl_get_data(bd); | |
70 | ||
71 | return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT); | |
72 | } | |
73 | ||
74 | static int nv50_set_intensity(struct backlight_device *bd) | |
75 | { | |
76 | struct drm_device *dev = bl_get_data(bd); | |
77 | int val = bd->props.brightness; | |
78 | ||
79 | nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT, | |
80 | val | NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static struct backlight_ops nv50_bl_ops = { | |
85 | .options = BL_CORE_SUSPENDRESUME, | |
86 | .get_brightness = nv50_get_intensity, | |
87 | .update_status = nv50_set_intensity, | |
88 | }; | |
89 | ||
90 | static int nouveau_nv40_backlight_init(struct drm_device *dev) | |
91 | { | |
a19a6ee6 | 92 | struct backlight_properties props; |
6ee73861 BS |
93 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
94 | struct backlight_device *bd; | |
95 | ||
96 | if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)) | |
97 | return 0; | |
98 | ||
a19a6ee6 MG |
99 | memset(&props, 0, sizeof(struct backlight_properties)); |
100 | props.max_brightness = 31; | |
6ee73861 | 101 | bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev, |
a19a6ee6 | 102 | &nv40_bl_ops, &props); |
6ee73861 BS |
103 | if (IS_ERR(bd)) |
104 | return PTR_ERR(bd); | |
105 | ||
106 | dev_priv->backlight = bd; | |
6ee73861 BS |
107 | bd->props.brightness = nv40_get_intensity(bd); |
108 | backlight_update_status(bd); | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int nouveau_nv50_backlight_init(struct drm_device *dev) | |
114 | { | |
a19a6ee6 | 115 | struct backlight_properties props; |
6ee73861 BS |
116 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
117 | struct backlight_device *bd; | |
118 | ||
119 | if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT)) | |
120 | return 0; | |
121 | ||
a19a6ee6 MG |
122 | memset(&props, 0, sizeof(struct backlight_properties)); |
123 | props.max_brightness = 1025; | |
6ee73861 | 124 | bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev, |
a19a6ee6 | 125 | &nv50_bl_ops, &props); |
6ee73861 BS |
126 | if (IS_ERR(bd)) |
127 | return PTR_ERR(bd); | |
128 | ||
129 | dev_priv->backlight = bd; | |
6ee73861 BS |
130 | bd->props.brightness = nv50_get_intensity(bd); |
131 | backlight_update_status(bd); | |
132 | return 0; | |
133 | } | |
134 | ||
135 | int nouveau_backlight_init(struct drm_device *dev) | |
136 | { | |
137 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
138 | ||
139 | switch (dev_priv->card_type) { | |
140 | case NV_40: | |
141 | return nouveau_nv40_backlight_init(dev); | |
142 | case NV_50: | |
143 | return nouveau_nv50_backlight_init(dev); | |
144 | default: | |
145 | break; | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | void nouveau_backlight_exit(struct drm_device *dev) | |
152 | { | |
153 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
154 | ||
155 | if (dev_priv->backlight) { | |
156 | backlight_device_unregister(dev_priv->backlight); | |
157 | dev_priv->backlight = NULL; | |
158 | } | |
159 | } |