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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 | 35 | |
51a3d342 | 36 | #include "nouveau_drm.h" |
6ee73861 | 37 | #include "nouveau_reg.h" |
10b461e4 | 38 | #include "nouveau_encoder.h" |
6ee73861 | 39 | |
73076481 BS |
40 | static int |
41 | nv40_get_intensity(struct backlight_device *bd) | |
6ee73861 | 42 | { |
51a3d342 BS |
43 | struct nouveau_drm *drm = bl_get_data(bd); |
44 | struct nouveau_device *device = nv_device(drm->device); | |
45 | int val = (nv_rd32(device, NV40_PMC_BACKLIGHT) & | |
46 | NV40_PMC_BACKLIGHT_MASK) >> 16; | |
6ee73861 BS |
47 | |
48 | return val; | |
49 | } | |
50 | ||
73076481 BS |
51 | static int |
52 | nv40_set_intensity(struct backlight_device *bd) | |
6ee73861 | 53 | { |
51a3d342 BS |
54 | struct nouveau_drm *drm = bl_get_data(bd); |
55 | struct nouveau_device *device = nv_device(drm->device); | |
6ee73861 | 56 | int val = bd->props.brightness; |
51a3d342 | 57 | int reg = nv_rd32(device, NV40_PMC_BACKLIGHT); |
6ee73861 | 58 | |
51a3d342 | 59 | nv_wr32(device, NV40_PMC_BACKLIGHT, |
6ee73861 BS |
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 | { |
77145f1c | 74 | struct nouveau_drm *drm = nouveau_drm(connector->dev); |
51a3d342 | 75 | struct nouveau_device *device = nv_device(drm->device); |
7eae3efa | 76 | struct backlight_properties props; |
6ee73861 BS |
77 | struct backlight_device *bd; |
78 | ||
51a3d342 | 79 | if (!(nv_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)) |
6ee73861 BS |
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; |
51a3d342 | 85 | bd = backlight_device_register("nv_backlight", &connector->kdev, drm, |
a19a6ee6 | 86 | &nv40_bl_ops, &props); |
51a3d342 | 87 | drm->backlight = bd; |
6ee73861 BS |
88 | bd->props.brightness = nv40_get_intensity(bd); |
89 | backlight_update_status(bd); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
73076481 BS |
94 | static int |
95 | nv50_get_intensity(struct backlight_device *bd) | |
96 | { | |
10b461e4 | 97 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
77145f1c | 98 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
51a3d342 | 99 | struct nouveau_device *device = nv_device(drm->device); |
10b461e4 | 100 | int or = nv_encoder->or; |
09461459 BS |
101 | u32 div = 1025; |
102 | u32 val; | |
73076481 | 103 | |
51a3d342 | 104 | val = nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); |
5024c54b | 105 | val &= NV50_PDISP_SOR_PWM_CTL_VAL; |
09461459 | 106 | return ((val * 100) + (div / 2)) / div; |
73076481 BS |
107 | } |
108 | ||
109 | static int | |
110 | nv50_set_intensity(struct backlight_device *bd) | |
111 | { | |
10b461e4 | 112 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
77145f1c | 113 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
51a3d342 | 114 | struct nouveau_device *device = nv_device(drm->device); |
10b461e4 | 115 | int or = nv_encoder->or; |
09461459 BS |
116 | u32 div = 1025; |
117 | u32 val = (bd->props.brightness * div) / 100; | |
73076481 | 118 | |
51a3d342 BS |
119 | nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), |
120 | NV50_PDISP_SOR_PWM_CTL_NEW | val); | |
73076481 BS |
121 | return 0; |
122 | } | |
123 | ||
124 | static const struct backlight_ops nv50_bl_ops = { | |
125 | .options = BL_CORE_SUSPENDRESUME, | |
126 | .get_brightness = nv50_get_intensity, | |
127 | .update_status = nv50_set_intensity, | |
128 | }; | |
129 | ||
5024c54b BS |
130 | static int |
131 | nva3_get_intensity(struct backlight_device *bd) | |
132 | { | |
133 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); | |
77145f1c | 134 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
51a3d342 | 135 | struct nouveau_device *device = nv_device(drm->device); |
5024c54b BS |
136 | int or = nv_encoder->or; |
137 | u32 div, val; | |
138 | ||
51a3d342 BS |
139 | div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); |
140 | val = nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); | |
5024c54b BS |
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); | |
77145f1c | 152 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
51a3d342 | 153 | struct nouveau_device *device = nv_device(drm->device); |
5024c54b BS |
154 | int or = nv_encoder->or; |
155 | u32 div, val; | |
156 | ||
51a3d342 | 157 | div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); |
5024c54b BS |
158 | val = (bd->props.brightness * div) / 100; |
159 | if (div) { | |
51a3d342 BS |
160 | nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val | |
161 | NV50_PDISP_SOR_PWM_CTL_NEW | | |
162 | NVA3_PDISP_SOR_PWM_CTL_UNK); | |
5024c54b BS |
163 | return 0; |
164 | } | |
165 | ||
166 | return -EINVAL; | |
167 | } | |
168 | ||
169 | static const struct backlight_ops nva3_bl_ops = { | |
170 | .options = BL_CORE_SUSPENDRESUME, | |
171 | .get_brightness = nva3_get_intensity, | |
172 | .update_status = nva3_set_intensity, | |
173 | }; | |
174 | ||
73076481 BS |
175 | static int |
176 | nv50_backlight_init(struct drm_connector *connector) | |
6ee73861 | 177 | { |
77145f1c | 178 | struct nouveau_drm *drm = nouveau_drm(connector->dev); |
51a3d342 | 179 | struct nouveau_device *device = nv_device(drm->device); |
10b461e4 | 180 | struct nouveau_encoder *nv_encoder; |
7eae3efa | 181 | struct backlight_properties props; |
6ee73861 | 182 | struct backlight_device *bd; |
5024c54b | 183 | const struct backlight_ops *ops; |
10b461e4 | 184 | |
cb75d97e | 185 | nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS); |
10b461e4 | 186 | if (!nv_encoder) { |
cb75d97e | 187 | nv_encoder = find_encoder(connector, DCB_OUTPUT_DP); |
10b461e4 BS |
188 | if (!nv_encoder) |
189 | return -ENODEV; | |
190 | } | |
191 | ||
51a3d342 | 192 | if (!nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or))) |
6ee73861 BS |
193 | return 0; |
194 | ||
51a3d342 BS |
195 | if (device->chipset <= 0xa0 || |
196 | device->chipset == 0xaa || | |
197 | device->chipset == 0xac) | |
5024c54b BS |
198 | ops = &nv50_bl_ops; |
199 | else | |
200 | ops = &nva3_bl_ops; | |
201 | ||
a19a6ee6 | 202 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 203 | props.type = BACKLIGHT_RAW; |
09461459 | 204 | props.max_brightness = 100; |
10b461e4 | 205 | bd = backlight_device_register("nv_backlight", &connector->kdev, |
5024c54b | 206 | nv_encoder, ops, &props); |
6ee73861 BS |
207 | if (IS_ERR(bd)) |
208 | return PTR_ERR(bd); | |
209 | ||
51a3d342 | 210 | drm->backlight = bd; |
5024c54b | 211 | bd->props.brightness = bd->ops->get_brightness(bd); |
6ee73861 BS |
212 | backlight_update_status(bd); |
213 | return 0; | |
214 | } | |
215 | ||
73076481 | 216 | int |
10b461e4 | 217 | nouveau_backlight_init(struct drm_device *dev) |
6ee73861 | 218 | { |
77145f1c | 219 | struct nouveau_drm *drm = nouveau_drm(dev); |
51a3d342 | 220 | struct nouveau_device *device = nv_device(drm->device); |
10b461e4 | 221 | struct drm_connector *connector; |
6ee73861 | 222 | |
5bead799 BS |
223 | #ifdef CONFIG_ACPI |
224 | if (acpi_video_backlight_support()) { | |
51a3d342 | 225 | NV_INFO(drm, "ACPI backlight interface available, " |
5bead799 BS |
226 | "not registering our own\n"); |
227 | return 0; | |
228 | } | |
229 | #endif | |
230 | ||
10b461e4 BS |
231 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
232 | if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && | |
233 | connector->connector_type != DRM_MODE_CONNECTOR_eDP) | |
234 | continue; | |
235 | ||
51a3d342 | 236 | switch (device->card_type) { |
10b461e4 BS |
237 | case NV_40: |
238 | return nv40_backlight_init(connector); | |
239 | case NV_50: | |
240 | return nv50_backlight_init(connector); | |
241 | default: | |
242 | break; | |
243 | } | |
6ee73861 BS |
244 | } |
245 | ||
10b461e4 | 246 | |
6ee73861 BS |
247 | return 0; |
248 | } | |
249 | ||
73076481 | 250 | void |
10b461e4 | 251 | nouveau_backlight_exit(struct drm_device *dev) |
6ee73861 | 252 | { |
77145f1c | 253 | struct nouveau_drm *drm = nouveau_drm(dev); |
6ee73861 | 254 | |
51a3d342 BS |
255 | if (drm->backlight) { |
256 | backlight_device_unregister(drm->backlight); | |
257 | drm->backlight = NULL; | |
6ee73861 BS |
258 | } |
259 | } |