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6ee73861 BS |
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> | |
5bead799 | 34 | #include <linux/acpi.h> |
6ee73861 BS |
35 | |
36 | #include "drmP.h" | |
37 | #include "nouveau_drv.h" | |
38 | #include "nouveau_drm.h" | |
39 | #include "nouveau_reg.h" | |
10b461e4 | 40 | #include "nouveau_encoder.h" |
6ee73861 | 41 | |
73076481 BS |
42 | static int |
43 | nv40_get_intensity(struct backlight_device *bd) | |
6ee73861 BS |
44 | { |
45 | struct drm_device *dev = bl_get_data(bd); | |
46 | int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK) | |
47 | >> 16; | |
48 | ||
49 | return val; | |
50 | } | |
51 | ||
73076481 BS |
52 | static int |
53 | nv40_set_intensity(struct backlight_device *bd) | |
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54 | { |
55 | struct drm_device *dev = bl_get_data(bd); | |
56 | int val = bd->props.brightness; | |
57 | int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT); | |
58 | ||
59 | nv_wr32(dev, NV40_PMC_BACKLIGHT, | |
60 | (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK)); | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
acc2472e | 65 | static const struct backlight_ops nv40_bl_ops = { |
6ee73861 BS |
66 | .options = BL_CORE_SUSPENDRESUME, |
67 | .get_brightness = nv40_get_intensity, | |
68 | .update_status = nv40_set_intensity, | |
69 | }; | |
70 | ||
73076481 BS |
71 | static int |
72 | nv40_backlight_init(struct drm_connector *connector) | |
6ee73861 | 73 | { |
7eae3efa | 74 | struct drm_device *dev = connector->dev; |
6ee73861 | 75 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
7eae3efa | 76 | struct backlight_properties props; |
6ee73861 BS |
77 | struct backlight_device *bd; |
78 | ||
79 | if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)) | |
80 | return 0; | |
81 | ||
a19a6ee6 | 82 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 83 | props.type = BACKLIGHT_RAW; |
a19a6ee6 | 84 | props.max_brightness = 31; |
7eae3efa | 85 | bd = backlight_device_register("nv_backlight", &connector->kdev, dev, |
a19a6ee6 | 86 | &nv40_bl_ops, &props); |
6ee73861 BS |
87 | if (IS_ERR(bd)) |
88 | return PTR_ERR(bd); | |
89 | ||
90 | dev_priv->backlight = bd; | |
6ee73861 BS |
91 | bd->props.brightness = nv40_get_intensity(bd); |
92 | backlight_update_status(bd); | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
73076481 BS |
97 | static int |
98 | nv50_get_intensity(struct backlight_device *bd) | |
99 | { | |
10b461e4 BS |
100 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
101 | struct drm_device *dev = nv_encoder->base.base.dev; | |
102 | int or = nv_encoder->or; | |
09461459 BS |
103 | u32 div = 1025; |
104 | u32 val; | |
73076481 | 105 | |
5024c54b BS |
106 | val = nv_rd32(dev, NV50_PDISP_SOR_PWM_CTL(or)); |
107 | val &= NV50_PDISP_SOR_PWM_CTL_VAL; | |
09461459 | 108 | return ((val * 100) + (div / 2)) / div; |
73076481 BS |
109 | } |
110 | ||
111 | static int | |
112 | nv50_set_intensity(struct backlight_device *bd) | |
113 | { | |
10b461e4 BS |
114 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
115 | struct drm_device *dev = nv_encoder->base.base.dev; | |
10b461e4 | 116 | int or = nv_encoder->or; |
09461459 BS |
117 | u32 div = 1025; |
118 | u32 val = (bd->props.brightness * div) / 100; | |
73076481 | 119 | |
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120 | nv_wr32(dev, NV50_PDISP_SOR_PWM_CTL(or), |
121 | NV50_PDISP_SOR_PWM_CTL_NEW | val); | |
73076481 BS |
122 | return 0; |
123 | } | |
124 | ||
125 | static const struct backlight_ops nv50_bl_ops = { | |
126 | .options = BL_CORE_SUSPENDRESUME, | |
127 | .get_brightness = nv50_get_intensity, | |
128 | .update_status = nv50_set_intensity, | |
129 | }; | |
130 | ||
5024c54b BS |
131 | static int |
132 | nva3_get_intensity(struct backlight_device *bd) | |
133 | { | |
134 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); | |
135 | struct drm_device *dev = nv_encoder->base.base.dev; | |
136 | int or = nv_encoder->or; | |
137 | u32 div, val; | |
138 | ||
139 | div = nv_rd32(dev, NV50_PDISP_SOR_PWM_DIV(or)); | |
140 | val = nv_rd32(dev, NV50_PDISP_SOR_PWM_CTL(or)); | |
141 | val &= NVA3_PDISP_SOR_PWM_CTL_VAL; | |
142 | if (div && div >= val) | |
143 | return ((val * 100) + (div / 2)) / div; | |
144 | ||
145 | return 100; | |
146 | } | |
147 | ||
148 | static int | |
149 | nva3_set_intensity(struct backlight_device *bd) | |
150 | { | |
151 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); | |
152 | struct drm_device *dev = nv_encoder->base.base.dev; | |
153 | int or = nv_encoder->or; | |
154 | u32 div, val; | |
155 | ||
156 | div = nv_rd32(dev, NV50_PDISP_SOR_PWM_DIV(or)); | |
157 | val = (bd->props.brightness * div) / 100; | |
158 | if (div) { | |
159 | nv_wr32(dev, NV50_PDISP_SOR_PWM_CTL(or), val | | |
160 | NV50_PDISP_SOR_PWM_CTL_NEW | | |
161 | NVA3_PDISP_SOR_PWM_CTL_UNK); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | return -EINVAL; | |
166 | } | |
167 | ||
168 | static const struct backlight_ops nva3_bl_ops = { | |
169 | .options = BL_CORE_SUSPENDRESUME, | |
170 | .get_brightness = nva3_get_intensity, | |
171 | .update_status = nva3_set_intensity, | |
172 | }; | |
173 | ||
73076481 BS |
174 | static int |
175 | nv50_backlight_init(struct drm_connector *connector) | |
6ee73861 | 176 | { |
7eae3efa | 177 | struct drm_device *dev = connector->dev; |
6ee73861 | 178 | struct drm_nouveau_private *dev_priv = dev->dev_private; |
10b461e4 | 179 | struct nouveau_encoder *nv_encoder; |
7eae3efa | 180 | struct backlight_properties props; |
6ee73861 | 181 | struct backlight_device *bd; |
5024c54b | 182 | const struct backlight_ops *ops; |
10b461e4 BS |
183 | |
184 | nv_encoder = find_encoder(connector, OUTPUT_LVDS); | |
185 | if (!nv_encoder) { | |
186 | nv_encoder = find_encoder(connector, OUTPUT_DP); | |
187 | if (!nv_encoder) | |
188 | return -ENODEV; | |
189 | } | |
190 | ||
5024c54b | 191 | if (!nv_rd32(dev, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or))) |
6ee73861 BS |
192 | return 0; |
193 | ||
5024c54b BS |
194 | if (dev_priv->chipset <= 0xa0 || |
195 | dev_priv->chipset == 0xaa || | |
196 | dev_priv->chipset == 0xac) | |
197 | ops = &nv50_bl_ops; | |
198 | else | |
199 | ops = &nva3_bl_ops; | |
200 | ||
a19a6ee6 | 201 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 202 | props.type = BACKLIGHT_RAW; |
09461459 | 203 | props.max_brightness = 100; |
10b461e4 | 204 | bd = backlight_device_register("nv_backlight", &connector->kdev, |
5024c54b | 205 | nv_encoder, ops, &props); |
6ee73861 BS |
206 | if (IS_ERR(bd)) |
207 | return PTR_ERR(bd); | |
208 | ||
209 | dev_priv->backlight = bd; | |
5024c54b | 210 | bd->props.brightness = bd->ops->get_brightness(bd); |
6ee73861 BS |
211 | backlight_update_status(bd); |
212 | return 0; | |
213 | } | |
214 | ||
73076481 | 215 | int |
10b461e4 | 216 | nouveau_backlight_init(struct drm_device *dev) |
6ee73861 BS |
217 | { |
218 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
10b461e4 | 219 | struct drm_connector *connector; |
6ee73861 | 220 | |
5bead799 BS |
221 | #ifdef CONFIG_ACPI |
222 | if (acpi_video_backlight_support()) { | |
223 | NV_INFO(dev, "ACPI backlight interface available, " | |
224 | "not registering our own\n"); | |
225 | return 0; | |
226 | } | |
227 | #endif | |
228 | ||
10b461e4 BS |
229 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
230 | if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && | |
231 | connector->connector_type != DRM_MODE_CONNECTOR_eDP) | |
232 | continue; | |
233 | ||
234 | switch (dev_priv->card_type) { | |
235 | case NV_40: | |
236 | return nv40_backlight_init(connector); | |
237 | case NV_50: | |
238 | return nv50_backlight_init(connector); | |
239 | default: | |
240 | break; | |
241 | } | |
6ee73861 BS |
242 | } |
243 | ||
10b461e4 | 244 | |
6ee73861 BS |
245 | return 0; |
246 | } | |
247 | ||
73076481 | 248 | void |
10b461e4 | 249 | nouveau_backlight_exit(struct drm_device *dev) |
6ee73861 BS |
250 | { |
251 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
252 | ||
253 | if (dev_priv->backlight) { | |
254 | backlight_device_unregister(dev_priv->backlight); | |
255 | dev_priv->backlight = NULL; | |
256 | } | |
257 | } |