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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/apple-gmux.h>
34#include <linux/backlight.h>
35#include <linux/idr.h>
36
37#include "nouveau_drv.h"
38#include "nouveau_reg.h"
39#include "nouveau_encoder.h"
40#include "nouveau_connector.h"
41
42static struct ida bl_ida;
43#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'
44
45struct nouveau_backlight {
46 struct backlight_device *dev;
47 int id;
48};
49
50static bool
51nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],
52 struct nouveau_backlight *bl)
53{
54 const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL);
55 if (nb < 0 || nb >= 100)
56 return false;
57 if (nb > 0)
58 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
59 else
60 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
61 bl->id = nb;
62 return true;
63}
64
65static int
66nv40_get_intensity(struct backlight_device *bd)
67{
68 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
69 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
70 struct nvif_object *device = &drm->client.device.object;
71 int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
72 NV40_PMC_BACKLIGHT_MASK) >> 16;
73
74 return val;
75}
76
77static int
78nv40_set_intensity(struct backlight_device *bd)
79{
80 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
81 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
82 struct nvif_object *device = &drm->client.device.object;
83 int val = bd->props.brightness;
84 int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
85
86 nvif_wr32(device, NV40_PMC_BACKLIGHT,
87 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
88
89 return 0;
90}
91
92static const struct backlight_ops nv40_bl_ops = {
93 .options = BL_CORE_SUSPENDRESUME,
94 .get_brightness = nv40_get_intensity,
95 .update_status = nv40_set_intensity,
96};
97
98static int
99nv40_backlight_init(struct nouveau_encoder *encoder,
100 struct backlight_properties *props,
101 const struct backlight_ops **ops)
102{
103 struct nouveau_drm *drm = nouveau_drm(encoder->base.base.dev);
104 struct nvif_object *device = &drm->client.device.object;
105
106 if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
107 return -ENODEV;
108
109 props->type = BACKLIGHT_RAW;
110 props->max_brightness = 31;
111 *ops = &nv40_bl_ops;
112 return 0;
113}
114
115static int
116nv50_get_intensity(struct backlight_device *bd)
117{
118 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
119 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
120 struct nvif_object *device = &drm->client.device.object;
121 int or = ffs(nv_encoder->dcb->or) - 1;
122 u32 div = 1025;
123 u32 val;
124
125 val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
126 val &= NV50_PDISP_SOR_PWM_CTL_VAL;
127 return ((val * 100) + (div / 2)) / div;
128}
129
130static int
131nv50_set_intensity(struct backlight_device *bd)
132{
133 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
134 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
135 struct nvif_object *device = &drm->client.device.object;
136 int or = ffs(nv_encoder->dcb->or) - 1;
137 u32 div = 1025;
138 u32 val = (bd->props.brightness * div) / 100;
139
140 nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
141 NV50_PDISP_SOR_PWM_CTL_NEW | val);
142 return 0;
143}
144
145static const struct backlight_ops nv50_bl_ops = {
146 .options = BL_CORE_SUSPENDRESUME,
147 .get_brightness = nv50_get_intensity,
148 .update_status = nv50_set_intensity,
149};
150
151static int
152nva3_get_intensity(struct backlight_device *bd)
153{
154 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
155 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
156 struct nvif_object *device = &drm->client.device.object;
157 int or = ffs(nv_encoder->dcb->or) - 1;
158 u32 div, val;
159
160 div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
161 val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
162 val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
163 if (div && div >= val)
164 return ((val * 100) + (div / 2)) / div;
165
166 return 100;
167}
168
169static int
170nva3_set_intensity(struct backlight_device *bd)
171{
172 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
173 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
174 struct nvif_object *device = &drm->client.device.object;
175 int or = ffs(nv_encoder->dcb->or) - 1;
176 u32 div, val;
177
178 div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
179 val = (bd->props.brightness * div) / 100;
180 if (div) {
181 nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
182 val |
183 NV50_PDISP_SOR_PWM_CTL_NEW |
184 NVA3_PDISP_SOR_PWM_CTL_UNK);
185 return 0;
186 }
187
188 return -EINVAL;
189}
190
191static const struct backlight_ops nva3_bl_ops = {
192 .options = BL_CORE_SUSPENDRESUME,
193 .get_brightness = nva3_get_intensity,
194 .update_status = nva3_set_intensity,
195};
196
197static int
198nv50_backlight_init(struct nouveau_encoder *nv_encoder,
199 struct backlight_properties *props,
200 const struct backlight_ops **ops)
201{
202 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
203 struct nvif_object *device = &drm->client.device.object;
204
205 if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1)))
206 return -ENODEV;
207
208 if (drm->client.device.info.chipset <= 0xa0 ||
209 drm->client.device.info.chipset == 0xaa ||
210 drm->client.device.info.chipset == 0xac)
211 *ops = &nv50_bl_ops;
212 else
213 *ops = &nva3_bl_ops;
214
215 props->type = BACKLIGHT_RAW;
216 props->max_brightness = 100;
217
218 return 0;
219}
220
221int
222nouveau_backlight_init(struct drm_connector *connector)
223{
224 struct nouveau_drm *drm = nouveau_drm(connector->dev);
225 struct nouveau_backlight *bl;
226 struct nouveau_encoder *nv_encoder = NULL;
227 struct nvif_device *device = &drm->client.device;
228 char backlight_name[BL_NAME_SIZE];
229 struct backlight_properties props = {0};
230 const struct backlight_ops *ops;
231 int ret;
232
233 if (apple_gmux_present()) {
234 NV_INFO_ONCE(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
235 return 0;
236 }
237
238 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
239 nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
240 else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
241 nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
242 else
243 return 0;
244
245 if (!nv_encoder)
246 return 0;
247
248 switch (device->info.family) {
249 case NV_DEVICE_INFO_V0_CURIE:
250 ret = nv40_backlight_init(nv_encoder, &props, &ops);
251 break;
252 case NV_DEVICE_INFO_V0_TESLA:
253 case NV_DEVICE_INFO_V0_FERMI:
254 case NV_DEVICE_INFO_V0_KEPLER:
255 case NV_DEVICE_INFO_V0_MAXWELL:
256 case NV_DEVICE_INFO_V0_PASCAL:
257 case NV_DEVICE_INFO_V0_VOLTA:
258 case NV_DEVICE_INFO_V0_TURING:
259 ret = nv50_backlight_init(nv_encoder, &props, &ops);
260 break;
261 default:
262 return 0;
263 }
264
265 if (ret == -ENODEV)
266 return 0;
267 else if (ret)
268 return ret;
269
270 bl = kzalloc(sizeof(*bl), GFP_KERNEL);
271 if (!bl)
272 return -ENOMEM;
273
274 if (!nouveau_get_backlight_name(backlight_name, bl)) {
275 NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
276 goto fail_alloc;
277 }
278
279 bl->dev = backlight_device_register(backlight_name, connector->kdev,
280 nv_encoder, ops, &props);
281 if (IS_ERR(bl->dev)) {
282 if (bl->id >= 0)
283 ida_simple_remove(&bl_ida, bl->id);
284 ret = PTR_ERR(bl->dev);
285 goto fail_alloc;
286 }
287
288 nouveau_connector(connector)->backlight = bl;
289 bl->dev->props.brightness = bl->dev->ops->get_brightness(bl->dev);
290 backlight_update_status(bl->dev);
291
292 return 0;
293
294fail_alloc:
295 kfree(bl);
296 return ret;
297}
298
299void
300nouveau_backlight_fini(struct drm_connector *connector)
301{
302 struct nouveau_connector *nv_conn = nouveau_connector(connector);
303 struct nouveau_backlight *bl = nv_conn->backlight;
304
305 if (!bl)
306 return;
307
308 if (bl->id >= 0)
309 ida_simple_remove(&bl_ida, bl->id);
310
311 backlight_device_unregister(bl->dev);
312 nv_conn->backlight = NULL;
313 kfree(bl);
314}
315
316void
317nouveau_backlight_ctor(void)
318{
319 ida_init(&bl_ida);
320}
321
322void
323nouveau_backlight_dtor(void)
324{
325 ida_destroy(&bl_ida);
326}
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#include <linux/acpi.h>
35
36#include "nouveau_drm.h"
37#include "nouveau_reg.h"
38#include "nouveau_encoder.h"
39
40static int
41nv40_get_intensity(struct backlight_device *bd)
42{
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;
47
48 return val;
49}
50
51static int
52nv40_set_intensity(struct backlight_device *bd)
53{
54 struct nouveau_drm *drm = bl_get_data(bd);
55 struct nouveau_device *device = nv_device(drm->device);
56 int val = bd->props.brightness;
57 int reg = nv_rd32(device, NV40_PMC_BACKLIGHT);
58
59 nv_wr32(device, NV40_PMC_BACKLIGHT,
60 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
61
62 return 0;
63}
64
65static const struct backlight_ops nv40_bl_ops = {
66 .options = BL_CORE_SUSPENDRESUME,
67 .get_brightness = nv40_get_intensity,
68 .update_status = nv40_set_intensity,
69};
70
71static int
72nv40_backlight_init(struct drm_connector *connector)
73{
74 struct nouveau_drm *drm = nouveau_drm(connector->dev);
75 struct nouveau_device *device = nv_device(drm->device);
76 struct backlight_properties props;
77 struct backlight_device *bd;
78
79 if (!(nv_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
80 return 0;
81
82 memset(&props, 0, sizeof(struct backlight_properties));
83 props.type = BACKLIGHT_RAW;
84 props.max_brightness = 31;
85 bd = backlight_device_register("nv_backlight", connector->kdev, drm,
86 &nv40_bl_ops, &props);
87 if (IS_ERR(bd))
88 return PTR_ERR(bd);
89 drm->backlight = bd;
90 bd->props.brightness = nv40_get_intensity(bd);
91 backlight_update_status(bd);
92
93 return 0;
94}
95
96static int
97nv50_get_intensity(struct backlight_device *bd)
98{
99 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
100 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
101 struct nouveau_device *device = nv_device(drm->device);
102 int or = nv_encoder->or;
103 u32 div = 1025;
104 u32 val;
105
106 val = nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
107 val &= NV50_PDISP_SOR_PWM_CTL_VAL;
108 return ((val * 100) + (div / 2)) / div;
109}
110
111static int
112nv50_set_intensity(struct backlight_device *bd)
113{
114 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
115 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
116 struct nouveau_device *device = nv_device(drm->device);
117 int or = nv_encoder->or;
118 u32 div = 1025;
119 u32 val = (bd->props.brightness * div) / 100;
120
121 nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
122 NV50_PDISP_SOR_PWM_CTL_NEW | val);
123 return 0;
124}
125
126static const struct backlight_ops nv50_bl_ops = {
127 .options = BL_CORE_SUSPENDRESUME,
128 .get_brightness = nv50_get_intensity,
129 .update_status = nv50_set_intensity,
130};
131
132static int
133nva3_get_intensity(struct backlight_device *bd)
134{
135 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
136 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
137 struct nouveau_device *device = nv_device(drm->device);
138 int or = nv_encoder->or;
139 u32 div, val;
140
141 div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
142 val = nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
143 val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
144 if (div && div >= val)
145 return ((val * 100) + (div / 2)) / div;
146
147 return 100;
148}
149
150static int
151nva3_set_intensity(struct backlight_device *bd)
152{
153 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
154 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
155 struct nouveau_device *device = nv_device(drm->device);
156 int or = nv_encoder->or;
157 u32 div, val;
158
159 div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
160 val = (bd->props.brightness * div) / 100;
161 if (div) {
162 nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val |
163 NV50_PDISP_SOR_PWM_CTL_NEW |
164 NVA3_PDISP_SOR_PWM_CTL_UNK);
165 return 0;
166 }
167
168 return -EINVAL;
169}
170
171static const struct backlight_ops nva3_bl_ops = {
172 .options = BL_CORE_SUSPENDRESUME,
173 .get_brightness = nva3_get_intensity,
174 .update_status = nva3_set_intensity,
175};
176
177static int
178nv50_backlight_init(struct drm_connector *connector)
179{
180 struct nouveau_drm *drm = nouveau_drm(connector->dev);
181 struct nouveau_device *device = nv_device(drm->device);
182 struct nouveau_encoder *nv_encoder;
183 struct backlight_properties props;
184 struct backlight_device *bd;
185 const struct backlight_ops *ops;
186
187 nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
188 if (!nv_encoder) {
189 nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
190 if (!nv_encoder)
191 return -ENODEV;
192 }
193
194 if (!nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
195 return 0;
196
197 if (device->chipset <= 0xa0 ||
198 device->chipset == 0xaa ||
199 device->chipset == 0xac)
200 ops = &nv50_bl_ops;
201 else
202 ops = &nva3_bl_ops;
203
204 memset(&props, 0, sizeof(struct backlight_properties));
205 props.type = BACKLIGHT_RAW;
206 props.max_brightness = 100;
207 bd = backlight_device_register("nv_backlight", connector->kdev,
208 nv_encoder, ops, &props);
209 if (IS_ERR(bd))
210 return PTR_ERR(bd);
211
212 drm->backlight = bd;
213 bd->props.brightness = bd->ops->get_brightness(bd);
214 backlight_update_status(bd);
215 return 0;
216}
217
218int
219nouveau_backlight_init(struct drm_device *dev)
220{
221 struct nouveau_drm *drm = nouveau_drm(dev);
222 struct nouveau_device *device = nv_device(drm->device);
223 struct drm_connector *connector;
224
225#ifdef CONFIG_ACPI
226 if (acpi_video_backlight_support()) {
227 NV_INFO(drm, "ACPI backlight interface available, "
228 "not registering our own\n");
229 return 0;
230 }
231#endif
232
233 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
234 if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
235 connector->connector_type != DRM_MODE_CONNECTOR_eDP)
236 continue;
237
238 switch (device->card_type) {
239 case NV_40:
240 return nv40_backlight_init(connector);
241 case NV_50:
242 case NV_C0:
243 case NV_D0:
244 case NV_E0:
245 return nv50_backlight_init(connector);
246 default:
247 break;
248 }
249 }
250
251
252 return 0;
253}
254
255void
256nouveau_backlight_exit(struct drm_device *dev)
257{
258 struct nouveau_drm *drm = nouveau_drm(dev);
259
260 if (drm->backlight) {
261 backlight_device_unregister(drm->backlight);
262 drm->backlight = NULL;
263 }
264}