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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 | ||
b53ac1ee | 33 | #include <linux/apple-gmux.h> |
6ee73861 | 34 | #include <linux/backlight.h> |
db1a0ae2 | 35 | #include <linux/idr.h> |
6ee73861 | 36 | |
4dc28134 | 37 | #include "nouveau_drv.h" |
6ee73861 | 38 | #include "nouveau_reg.h" |
10b461e4 | 39 | #include "nouveau_encoder.h" |
6ee73861 | 40 | |
db1a0ae2 PM |
41 | static struct ida bl_ida; |
42 | #define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0' | |
43 | ||
44 | struct backlight_connector { | |
45 | struct list_head head; | |
46 | int id; | |
47 | }; | |
48 | ||
49 | static bool | |
50 | nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE], struct backlight_connector | |
51 | *connector) | |
52 | { | |
53 | const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL); | |
54 | if (nb < 0 || nb >= 100) | |
55 | return false; | |
56 | if (nb > 0) | |
57 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb); | |
58 | else | |
59 | snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight"); | |
60 | connector->id = nb; | |
61 | return true; | |
62 | } | |
63 | ||
73076481 BS |
64 | static int |
65 | nv40_get_intensity(struct backlight_device *bd) | |
6ee73861 | 66 | { |
51a3d342 | 67 | struct nouveau_drm *drm = bl_get_data(bd); |
1167c6bc | 68 | struct nvif_object *device = &drm->client.device.object; |
db2bec18 | 69 | int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) & |
51a3d342 | 70 | NV40_PMC_BACKLIGHT_MASK) >> 16; |
6ee73861 BS |
71 | |
72 | return val; | |
73 | } | |
74 | ||
73076481 BS |
75 | static int |
76 | nv40_set_intensity(struct backlight_device *bd) | |
6ee73861 | 77 | { |
51a3d342 | 78 | struct nouveau_drm *drm = bl_get_data(bd); |
1167c6bc | 79 | struct nvif_object *device = &drm->client.device.object; |
6ee73861 | 80 | int val = bd->props.brightness; |
db2bec18 | 81 | int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT); |
6ee73861 | 82 | |
db2bec18 | 83 | nvif_wr32(device, NV40_PMC_BACKLIGHT, |
6ee73861 BS |
84 | (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK)); |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
acc2472e | 89 | static const struct backlight_ops nv40_bl_ops = { |
6ee73861 BS |
90 | .options = BL_CORE_SUSPENDRESUME, |
91 | .get_brightness = nv40_get_intensity, | |
92 | .update_status = nv40_set_intensity, | |
93 | }; | |
94 | ||
73076481 BS |
95 | static int |
96 | nv40_backlight_init(struct drm_connector *connector) | |
6ee73861 | 97 | { |
77145f1c | 98 | struct nouveau_drm *drm = nouveau_drm(connector->dev); |
1167c6bc | 99 | struct nvif_object *device = &drm->client.device.object; |
7eae3efa | 100 | struct backlight_properties props; |
6ee73861 | 101 | struct backlight_device *bd; |
db1a0ae2 PM |
102 | struct backlight_connector bl_connector; |
103 | char backlight_name[BL_NAME_SIZE]; | |
6ee73861 | 104 | |
db2bec18 | 105 | if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)) |
6ee73861 BS |
106 | return 0; |
107 | ||
a19a6ee6 | 108 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 109 | props.type = BACKLIGHT_RAW; |
a19a6ee6 | 110 | props.max_brightness = 31; |
db1a0ae2 PM |
111 | if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) { |
112 | NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n"); | |
113 | return 0; | |
114 | } | |
115 | bd = backlight_device_register(backlight_name , connector->kdev, drm, | |
a19a6ee6 | 116 | &nv40_bl_ops, &props); |
db1a0ae2 PM |
117 | |
118 | if (IS_ERR(bd)) { | |
86153365 | 119 | if (bl_connector.id >= 0) |
db1a0ae2 | 120 | ida_simple_remove(&bl_ida, bl_connector.id); |
b795016c | 121 | return PTR_ERR(bd); |
db1a0ae2 PM |
122 | } |
123 | list_add(&bl_connector.head, &drm->bl_connectors); | |
51a3d342 | 124 | drm->backlight = bd; |
6ee73861 BS |
125 | bd->props.brightness = nv40_get_intensity(bd); |
126 | backlight_update_status(bd); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
73076481 BS |
131 | static int |
132 | nv50_get_intensity(struct backlight_device *bd) | |
133 | { | |
10b461e4 | 134 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
77145f1c | 135 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
1167c6bc | 136 | struct nvif_object *device = &drm->client.device.object; |
014c43e0 | 137 | int or = ffs(nv_encoder->dcb->or) - 1; |
09461459 BS |
138 | u32 div = 1025; |
139 | u32 val; | |
73076481 | 140 | |
db2bec18 | 141 | val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); |
5024c54b | 142 | val &= NV50_PDISP_SOR_PWM_CTL_VAL; |
09461459 | 143 | return ((val * 100) + (div / 2)) / div; |
73076481 BS |
144 | } |
145 | ||
146 | static int | |
147 | nv50_set_intensity(struct backlight_device *bd) | |
148 | { | |
10b461e4 | 149 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); |
77145f1c | 150 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
1167c6bc | 151 | struct nvif_object *device = &drm->client.device.object; |
014c43e0 | 152 | int or = ffs(nv_encoder->dcb->or) - 1; |
09461459 BS |
153 | u32 div = 1025; |
154 | u32 val = (bd->props.brightness * div) / 100; | |
73076481 | 155 | |
db2bec18 | 156 | nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), |
51a3d342 | 157 | NV50_PDISP_SOR_PWM_CTL_NEW | val); |
73076481 BS |
158 | return 0; |
159 | } | |
160 | ||
161 | static const struct backlight_ops nv50_bl_ops = { | |
162 | .options = BL_CORE_SUSPENDRESUME, | |
163 | .get_brightness = nv50_get_intensity, | |
164 | .update_status = nv50_set_intensity, | |
165 | }; | |
166 | ||
5024c54b BS |
167 | static int |
168 | nva3_get_intensity(struct backlight_device *bd) | |
169 | { | |
170 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); | |
77145f1c | 171 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
1167c6bc | 172 | struct nvif_object *device = &drm->client.device.object; |
014c43e0 | 173 | int or = ffs(nv_encoder->dcb->or) - 1; |
5024c54b BS |
174 | u32 div, val; |
175 | ||
db2bec18 BS |
176 | div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); |
177 | val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); | |
5024c54b BS |
178 | val &= NVA3_PDISP_SOR_PWM_CTL_VAL; |
179 | if (div && div >= val) | |
180 | return ((val * 100) + (div / 2)) / div; | |
181 | ||
182 | return 100; | |
183 | } | |
184 | ||
185 | static int | |
186 | nva3_set_intensity(struct backlight_device *bd) | |
187 | { | |
188 | struct nouveau_encoder *nv_encoder = bl_get_data(bd); | |
77145f1c | 189 | struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); |
1167c6bc | 190 | struct nvif_object *device = &drm->client.device.object; |
014c43e0 | 191 | int or = ffs(nv_encoder->dcb->or) - 1; |
5024c54b BS |
192 | u32 div, val; |
193 | ||
db2bec18 | 194 | div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); |
5024c54b BS |
195 | val = (bd->props.brightness * div) / 100; |
196 | if (div) { | |
db2bec18 | 197 | nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val | |
51a3d342 BS |
198 | NV50_PDISP_SOR_PWM_CTL_NEW | |
199 | NVA3_PDISP_SOR_PWM_CTL_UNK); | |
5024c54b BS |
200 | return 0; |
201 | } | |
202 | ||
203 | return -EINVAL; | |
204 | } | |
205 | ||
206 | static const struct backlight_ops nva3_bl_ops = { | |
207 | .options = BL_CORE_SUSPENDRESUME, | |
208 | .get_brightness = nva3_get_intensity, | |
209 | .update_status = nva3_set_intensity, | |
210 | }; | |
211 | ||
73076481 BS |
212 | static int |
213 | nv50_backlight_init(struct drm_connector *connector) | |
6ee73861 | 214 | { |
77145f1c | 215 | struct nouveau_drm *drm = nouveau_drm(connector->dev); |
1167c6bc | 216 | struct nvif_object *device = &drm->client.device.object; |
10b461e4 | 217 | struct nouveau_encoder *nv_encoder; |
7eae3efa | 218 | struct backlight_properties props; |
6ee73861 | 219 | struct backlight_device *bd; |
5024c54b | 220 | const struct backlight_ops *ops; |
db1a0ae2 PM |
221 | struct backlight_connector bl_connector; |
222 | char backlight_name[BL_NAME_SIZE]; | |
10b461e4 | 223 | |
cb75d97e | 224 | nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS); |
10b461e4 | 225 | if (!nv_encoder) { |
cb75d97e | 226 | nv_encoder = find_encoder(connector, DCB_OUTPUT_DP); |
10b461e4 BS |
227 | if (!nv_encoder) |
228 | return -ENODEV; | |
229 | } | |
230 | ||
014c43e0 | 231 | if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1))) |
6ee73861 BS |
232 | return 0; |
233 | ||
1167c6bc BS |
234 | if (drm->client.device.info.chipset <= 0xa0 || |
235 | drm->client.device.info.chipset == 0xaa || | |
236 | drm->client.device.info.chipset == 0xac) | |
5024c54b BS |
237 | ops = &nv50_bl_ops; |
238 | else | |
239 | ops = &nva3_bl_ops; | |
240 | ||
a19a6ee6 | 241 | memset(&props, 0, sizeof(struct backlight_properties)); |
bb7ca747 | 242 | props.type = BACKLIGHT_RAW; |
09461459 | 243 | props.max_brightness = 100; |
db1a0ae2 PM |
244 | if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) { |
245 | NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n"); | |
246 | return 0; | |
247 | } | |
248 | bd = backlight_device_register(backlight_name , connector->kdev, | |
5024c54b | 249 | nv_encoder, ops, &props); |
db1a0ae2 PM |
250 | |
251 | if (IS_ERR(bd)) { | |
86153365 | 252 | if (bl_connector.id >= 0) |
db1a0ae2 | 253 | ida_simple_remove(&bl_ida, bl_connector.id); |
6ee73861 | 254 | return PTR_ERR(bd); |
db1a0ae2 | 255 | } |
6ee73861 | 256 | |
db1a0ae2 | 257 | list_add(&bl_connector.head, &drm->bl_connectors); |
51a3d342 | 258 | drm->backlight = bd; |
5024c54b | 259 | bd->props.brightness = bd->ops->get_brightness(bd); |
6ee73861 BS |
260 | backlight_update_status(bd); |
261 | return 0; | |
262 | } | |
263 | ||
73076481 | 264 | int |
10b461e4 | 265 | nouveau_backlight_init(struct drm_device *dev) |
6ee73861 | 266 | { |
77145f1c | 267 | struct nouveau_drm *drm = nouveau_drm(dev); |
1167c6bc | 268 | struct nvif_device *device = &drm->client.device; |
10b461e4 | 269 | struct drm_connector *connector; |
b282abd2 | 270 | struct drm_connector_list_iter conn_iter; |
6ee73861 | 271 | |
78d3c5de LW |
272 | INIT_LIST_HEAD(&drm->bl_connectors); |
273 | ||
b53ac1ee PM |
274 | if (apple_gmux_present()) { |
275 | NV_INFO(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n"); | |
276 | return 0; | |
277 | } | |
278 | ||
b282abd2 LP |
279 | drm_connector_list_iter_begin(dev, &conn_iter); |
280 | drm_for_each_connector_iter(connector, &conn_iter) { | |
10b461e4 BS |
281 | if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && |
282 | connector->connector_type != DRM_MODE_CONNECTOR_eDP) | |
283 | continue; | |
284 | ||
967e7bde BS |
285 | switch (device->info.family) { |
286 | case NV_DEVICE_INFO_V0_CURIE: | |
10b461e4 | 287 | return nv40_backlight_init(connector); |
967e7bde BS |
288 | case NV_DEVICE_INFO_V0_TESLA: |
289 | case NV_DEVICE_INFO_V0_FERMI: | |
290 | case NV_DEVICE_INFO_V0_KEPLER: | |
bbe1f94a | 291 | case NV_DEVICE_INFO_V0_MAXWELL: |
10b461e4 BS |
292 | return nv50_backlight_init(connector); |
293 | default: | |
294 | break; | |
295 | } | |
6ee73861 | 296 | } |
b282abd2 | 297 | drm_connector_list_iter_end(&conn_iter); |
10b461e4 | 298 | |
6ee73861 BS |
299 | return 0; |
300 | } | |
301 | ||
73076481 | 302 | void |
10b461e4 | 303 | nouveau_backlight_exit(struct drm_device *dev) |
6ee73861 | 304 | { |
77145f1c | 305 | struct nouveau_drm *drm = nouveau_drm(dev); |
db1a0ae2 PM |
306 | struct backlight_connector *connector; |
307 | ||
308 | list_for_each_entry(connector, &drm->bl_connectors, head) { | |
309 | if (connector->id >= 0) | |
310 | ida_simple_remove(&bl_ida, connector->id); | |
311 | } | |
6ee73861 | 312 | |
51a3d342 BS |
313 | if (drm->backlight) { |
314 | backlight_device_unregister(drm->backlight); | |
315 | drm->backlight = NULL; | |
6ee73861 BS |
316 | } |
317 | } | |
db1a0ae2 PM |
318 | |
319 | void | |
320 | nouveau_backlight_ctor(void) | |
321 | { | |
322 | ida_init(&bl_ida); | |
323 | } | |
324 | ||
325 | void | |
326 | nouveau_backlight_dtor(void) | |
327 | { | |
328 | ida_destroy(&bl_ida); | |
329 | } |