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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> | |
34 | ||
4dc28134 | 35 | #include "nouveau_drv.h" |
6ee73861 | 36 | #include "nouveau_reg.h" |
10b461e4 | 37 | #include "nouveau_encoder.h" |
6ee73861 | 38 | |
73076481 BS |
39 | static int |
40 | nv40_get_intensity(struct backlight_device *bd) | |
6ee73861 | 41 | { |
51a3d342 | 42 | struct nouveau_drm *drm = bl_get_data(bd); |
a01ca78c | 43 | struct nvif_object *device = &drm->device.object; |
db2bec18 | 44 | int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) & |
51a3d342 | 45 | NV40_PMC_BACKLIGHT_MASK) >> 16; |
6ee73861 BS |
46 | |
47 | return val; | |
48 | } | |
49 | ||
73076481 BS |
50 | static int |
51 | nv40_set_intensity(struct backlight_device *bd) | |
6ee73861 | 52 | { |
51a3d342 | 53 | struct nouveau_drm *drm = bl_get_data(bd); |
a01ca78c | 54 | struct nvif_object *device = &drm->device.object; |
6ee73861 | 55 | int val = bd->props.brightness; |
db2bec18 | 56 | int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT); |
6ee73861 | 57 | |
db2bec18 | 58 | nvif_wr32(device, NV40_PMC_BACKLIGHT, |
6ee73861 BS |
59 | (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK)); |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
acc2472e | 64 | static const struct backlight_ops nv40_bl_ops = { |
6ee73861 BS |
65 | .options = BL_CORE_SUSPENDRESUME, |
66 | .get_brightness = nv40_get_intensity, | |
67 | .update_status = nv40_set_intensity, | |
68 | }; | |
69 | ||
73076481 BS |
70 | static int |
71 | nv40_backlight_init(struct drm_connector *connector) | |
6ee73861 | 72 | { |
77145f1c | 73 | struct nouveau_drm *drm = nouveau_drm(connector->dev); |
a01ca78c | 74 | struct nvif_object *device = &drm->device.object; |
7eae3efa | 75 | struct backlight_properties props; |
6ee73861 BS |
76 | struct backlight_device *bd; |
77 | ||
db2bec18 | 78 | if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)) |
6ee73861 BS |
79 | return 0; |
80 | ||
a19a6ee6 | 81 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 82 | props.type = BACKLIGHT_RAW; |
a19a6ee6 | 83 | props.max_brightness = 31; |
5bdebb18 | 84 | bd = backlight_device_register("nv_backlight", connector->kdev, drm, |
a19a6ee6 | 85 | &nv40_bl_ops, &props); |
b795016c MS |
86 | if (IS_ERR(bd)) |
87 | return PTR_ERR(bd); | |
51a3d342 | 88 | drm->backlight = bd; |
6ee73861 BS |
89 | bd->props.brightness = nv40_get_intensity(bd); |
90 | backlight_update_status(bd); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
73076481 BS |
95 | static int |
96 | nv50_get_intensity(struct backlight_device *bd) | |
97 | { | |
10b461e4 | 98 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
77145f1c | 99 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
a01ca78c | 100 | struct nvif_object *device = &drm->device.object; |
10b461e4 | 101 | int or = nv_encoder->or; |
09461459 BS |
102 | u32 div = 1025; |
103 | u32 val; | |
73076481 | 104 | |
db2bec18 | 105 | val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); |
5024c54b | 106 | val &= NV50_PDISP_SOR_PWM_CTL_VAL; |
09461459 | 107 | return ((val * 100) + (div / 2)) / div; |
73076481 BS |
108 | } |
109 | ||
110 | static int | |
111 | nv50_set_intensity(struct backlight_device *bd) | |
112 | { | |
10b461e4 | 113 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
77145f1c | 114 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
a01ca78c | 115 | struct nvif_object *device = &drm->device.object; |
10b461e4 | 116 | int or = nv_encoder->or; |
09461459 BS |
117 | u32 div = 1025; |
118 | u32 val = (bd->props.brightness * div) / 100; | |
73076481 | 119 | |
db2bec18 | 120 | nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), |
51a3d342 | 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); | |
77145f1c | 135 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
a01ca78c | 136 | struct nvif_object *device = &drm->device.object; |
5024c54b BS |
137 | int or = nv_encoder->or; |
138 | u32 div, val; | |
139 | ||
db2bec18 BS |
140 | div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); |
141 | val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); | |
5024c54b BS |
142 | val &= NVA3_PDISP_SOR_PWM_CTL_VAL; |
143 | if (div && div >= val) | |
144 | return ((val * 100) + (div / 2)) / div; | |
145 | ||
146 | return 100; | |
147 | } | |
148 | ||
149 | static int | |
150 | nva3_set_intensity(struct backlight_device *bd) | |
151 | { | |
152 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); | |
77145f1c | 153 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
a01ca78c | 154 | struct nvif_object *device = &drm->device.object; |
5024c54b BS |
155 | int or = nv_encoder->or; |
156 | u32 div, val; | |
157 | ||
db2bec18 | 158 | div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); |
5024c54b BS |
159 | val = (bd->props.brightness * div) / 100; |
160 | if (div) { | |
db2bec18 | 161 | nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val | |
51a3d342 BS |
162 | NV50_PDISP_SOR_PWM_CTL_NEW | |
163 | NVA3_PDISP_SOR_PWM_CTL_UNK); | |
5024c54b BS |
164 | return 0; |
165 | } | |
166 | ||
167 | return -EINVAL; | |
168 | } | |
169 | ||
170 | static const struct backlight_ops nva3_bl_ops = { | |
171 | .options = BL_CORE_SUSPENDRESUME, | |
172 | .get_brightness = nva3_get_intensity, | |
173 | .update_status = nva3_set_intensity, | |
174 | }; | |
175 | ||
73076481 BS |
176 | static int |
177 | nv50_backlight_init(struct drm_connector *connector) | |
6ee73861 | 178 | { |
77145f1c | 179 | struct nouveau_drm *drm = nouveau_drm(connector->dev); |
a01ca78c | 180 | struct nvif_object *device = &drm->device.object; |
10b461e4 | 181 | struct nouveau_encoder *nv_encoder; |
7eae3efa | 182 | struct backlight_properties props; |
6ee73861 | 183 | struct backlight_device *bd; |
5024c54b | 184 | const struct backlight_ops *ops; |
10b461e4 | 185 | |
cb75d97e | 186 | nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS); |
10b461e4 | 187 | if (!nv_encoder) { |
cb75d97e | 188 | nv_encoder = find_encoder(connector, DCB_OUTPUT_DP); |
10b461e4 BS |
189 | if (!nv_encoder) |
190 | return -ENODEV; | |
191 | } | |
192 | ||
db2bec18 | 193 | if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or))) |
6ee73861 BS |
194 | return 0; |
195 | ||
a01ca78c BS |
196 | if (drm->device.info.chipset <= 0xa0 || |
197 | drm->device.info.chipset == 0xaa || | |
198 | drm->device.info.chipset == 0xac) | |
5024c54b BS |
199 | ops = &nv50_bl_ops; |
200 | else | |
201 | ops = &nva3_bl_ops; | |
202 | ||
a19a6ee6 | 203 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 204 | props.type = BACKLIGHT_RAW; |
09461459 | 205 | props.max_brightness = 100; |
5bdebb18 | 206 | bd = backlight_device_register("nv_backlight", connector->kdev, |
5024c54b | 207 | nv_encoder, ops, &props); |
6ee73861 BS |
208 | if (IS_ERR(bd)) |
209 | return PTR_ERR(bd); | |
210 | ||
51a3d342 | 211 | drm->backlight = bd; |
5024c54b | 212 | bd->props.brightness = bd->ops->get_brightness(bd); |
6ee73861 BS |
213 | backlight_update_status(bd); |
214 | return 0; | |
215 | } | |
216 | ||
73076481 | 217 | int |
10b461e4 | 218 | nouveau_backlight_init(struct drm_device *dev) |
6ee73861 | 219 | { |
77145f1c | 220 | struct nouveau_drm *drm = nouveau_drm(dev); |
967e7bde | 221 | struct nvif_device *device = &drm->device; |
10b461e4 | 222 | struct drm_connector *connector; |
6ee73861 | 223 | |
10b461e4 BS |
224 | list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
225 | if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && | |
226 | connector->connector_type != DRM_MODE_CONNECTOR_eDP) | |
227 | continue; | |
228 | ||
967e7bde BS |
229 | switch (device->info.family) { |
230 | case NV_DEVICE_INFO_V0_CURIE: | |
10b461e4 | 231 | return nv40_backlight_init(connector); |
967e7bde BS |
232 | case NV_DEVICE_INFO_V0_TESLA: |
233 | case NV_DEVICE_INFO_V0_FERMI: | |
234 | case NV_DEVICE_INFO_V0_KEPLER: | |
10b461e4 BS |
235 | return nv50_backlight_init(connector); |
236 | default: | |
237 | break; | |
238 | } | |
6ee73861 BS |
239 | } |
240 | ||
10b461e4 | 241 | |
6ee73861 BS |
242 | return 0; |
243 | } | |
244 | ||
73076481 | 245 | void |
10b461e4 | 246 | nouveau_backlight_exit(struct drm_device *dev) |
6ee73861 | 247 | { |
77145f1c | 248 | struct nouveau_drm *drm = nouveau_drm(dev); |
6ee73861 | 249 | |
51a3d342 BS |
250 | if (drm->backlight) { |
251 | backlight_device_unregister(drm->backlight); | |
252 | drm->backlight = NULL; | |
6ee73861 BS |
253 | } |
254 | } |