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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/backlight.h>
34#include <linux/acpi.h>
35
36#include "drmP.h"
37#include "nouveau_drv.h"
38#include "nouveau_drm.h"
39#include "nouveau_reg.h"
40
41static int nv40_get_intensity(struct backlight_device *bd)
42{
43 struct drm_device *dev = bl_get_data(bd);
44 int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)
45 >> 16;
46
47 return val;
48}
49
50static int nv40_set_intensity(struct backlight_device *bd)
51{
52 struct drm_device *dev = bl_get_data(bd);
53 int val = bd->props.brightness;
54 int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT);
55
56 nv_wr32(dev, NV40_PMC_BACKLIGHT,
57 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
58
59 return 0;
60}
61
62static const struct backlight_ops nv40_bl_ops = {
63 .options = BL_CORE_SUSPENDRESUME,
64 .get_brightness = nv40_get_intensity,
65 .update_status = nv40_set_intensity,
66};
67
68static int nv50_get_intensity(struct backlight_device *bd)
69{
70 struct drm_device *dev = bl_get_data(bd);
71
72 return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT);
73}
74
75static int nv50_set_intensity(struct backlight_device *bd)
76{
77 struct drm_device *dev = bl_get_data(bd);
78 int val = bd->props.brightness;
79
80 nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT,
81 val | NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE);
82 return 0;
83}
84
85static const struct backlight_ops nv50_bl_ops = {
86 .options = BL_CORE_SUSPENDRESUME,
87 .get_brightness = nv50_get_intensity,
88 .update_status = nv50_set_intensity,
89};
90
91static int nouveau_nv40_backlight_init(struct drm_connector *connector)
92{
93 struct drm_device *dev = connector->dev;
94 struct drm_nouveau_private *dev_priv = dev->dev_private;
95 struct backlight_properties props;
96 struct backlight_device *bd;
97
98 if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
99 return 0;
100
101 memset(&props, 0, sizeof(struct backlight_properties));
102 props.type = BACKLIGHT_RAW;
103 props.max_brightness = 31;
104 bd = backlight_device_register("nv_backlight", &connector->kdev, dev,
105 &nv40_bl_ops, &props);
106 if (IS_ERR(bd))
107 return PTR_ERR(bd);
108
109 dev_priv->backlight = bd;
110 bd->props.brightness = nv40_get_intensity(bd);
111 backlight_update_status(bd);
112
113 return 0;
114}
115
116static int nouveau_nv50_backlight_init(struct drm_connector *connector)
117{
118 struct drm_device *dev = connector->dev;
119 struct drm_nouveau_private *dev_priv = dev->dev_private;
120 struct backlight_properties props;
121 struct backlight_device *bd;
122
123 if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT))
124 return 0;
125
126 memset(&props, 0, sizeof(struct backlight_properties));
127 props.type = BACKLIGHT_RAW;
128 props.max_brightness = 1025;
129 bd = backlight_device_register("nv_backlight", &connector->kdev, dev,
130 &nv50_bl_ops, &props);
131 if (IS_ERR(bd))
132 return PTR_ERR(bd);
133
134 dev_priv->backlight = bd;
135 bd->props.brightness = nv50_get_intensity(bd);
136 backlight_update_status(bd);
137 return 0;
138}
139
140int nouveau_backlight_init(struct drm_connector *connector)
141{
142 struct drm_device *dev = connector->dev;
143 struct drm_nouveau_private *dev_priv = dev->dev_private;
144
145#ifdef CONFIG_ACPI
146 if (acpi_video_backlight_support()) {
147 NV_INFO(dev, "ACPI backlight interface available, "
148 "not registering our own\n");
149 return 0;
150 }
151#endif
152
153 switch (dev_priv->card_type) {
154 case NV_40:
155 return nouveau_nv40_backlight_init(connector);
156 case NV_50:
157 return nouveau_nv50_backlight_init(connector);
158 default:
159 break;
160 }
161
162 return 0;
163}
164
165void nouveau_backlight_exit(struct drm_connector *connector)
166{
167 struct drm_device *dev = connector->dev;
168 struct drm_nouveau_private *dev_priv = dev->dev_private;
169
170 if (dev_priv->backlight) {
171 backlight_device_unregister(dev_priv->backlight);
172 dev_priv->backlight = NULL;
173 }
174}
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
35#include "nouveau_drm.h"
36#include "nouveau_reg.h"
37#include "nouveau_encoder.h"
38
39static int
40nv40_get_intensity(struct backlight_device *bd)
41{
42 struct nouveau_drm *drm = bl_get_data(bd);
43 struct nvif_object *device = &drm->device.object;
44 int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
45 NV40_PMC_BACKLIGHT_MASK) >> 16;
46
47 return val;
48}
49
50static int
51nv40_set_intensity(struct backlight_device *bd)
52{
53 struct nouveau_drm *drm = bl_get_data(bd);
54 struct nvif_object *device = &drm->device.object;
55 int val = bd->props.brightness;
56 int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
57
58 nvif_wr32(device, NV40_PMC_BACKLIGHT,
59 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
60
61 return 0;
62}
63
64static const struct backlight_ops nv40_bl_ops = {
65 .options = BL_CORE_SUSPENDRESUME,
66 .get_brightness = nv40_get_intensity,
67 .update_status = nv40_set_intensity,
68};
69
70static int
71nv40_backlight_init(struct drm_connector *connector)
72{
73 struct nouveau_drm *drm = nouveau_drm(connector->dev);
74 struct nvif_object *device = &drm->device.object;
75 struct backlight_properties props;
76 struct backlight_device *bd;
77
78 if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
79 return 0;
80
81 memset(&props, 0, sizeof(struct backlight_properties));
82 props.type = BACKLIGHT_RAW;
83 props.max_brightness = 31;
84 bd = backlight_device_register("nv_backlight", connector->kdev, drm,
85 &nv40_bl_ops, &props);
86 if (IS_ERR(bd))
87 return PTR_ERR(bd);
88 drm->backlight = bd;
89 bd->props.brightness = nv40_get_intensity(bd);
90 backlight_update_status(bd);
91
92 return 0;
93}
94
95static int
96nv50_get_intensity(struct backlight_device *bd)
97{
98 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
99 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
100 struct nvif_object *device = &drm->device.object;
101 int or = nv_encoder->or;
102 u32 div = 1025;
103 u32 val;
104
105 val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
106 val &= NV50_PDISP_SOR_PWM_CTL_VAL;
107 return ((val * 100) + (div / 2)) / div;
108}
109
110static int
111nv50_set_intensity(struct backlight_device *bd)
112{
113 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
114 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
115 struct nvif_object *device = &drm->device.object;
116 int or = nv_encoder->or;
117 u32 div = 1025;
118 u32 val = (bd->props.brightness * div) / 100;
119
120 nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
121 NV50_PDISP_SOR_PWM_CTL_NEW | val);
122 return 0;
123}
124
125static 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
131static int
132nva3_get_intensity(struct backlight_device *bd)
133{
134 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
135 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
136 struct nvif_object *device = &drm->device.object;
137 int or = nv_encoder->or;
138 u32 div, val;
139
140 div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
141 val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
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
149static int
150nva3_set_intensity(struct backlight_device *bd)
151{
152 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
153 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
154 struct nvif_object *device = &drm->device.object;
155 int or = nv_encoder->or;
156 u32 div, val;
157
158 div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
159 val = (bd->props.brightness * div) / 100;
160 if (div) {
161 nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val |
162 NV50_PDISP_SOR_PWM_CTL_NEW |
163 NVA3_PDISP_SOR_PWM_CTL_UNK);
164 return 0;
165 }
166
167 return -EINVAL;
168}
169
170static 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
176static int
177nv50_backlight_init(struct drm_connector *connector)
178{
179 struct nouveau_drm *drm = nouveau_drm(connector->dev);
180 struct nvif_object *device = &drm->device.object;
181 struct nouveau_encoder *nv_encoder;
182 struct backlight_properties props;
183 struct backlight_device *bd;
184 const struct backlight_ops *ops;
185
186 nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
187 if (!nv_encoder) {
188 nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
189 if (!nv_encoder)
190 return -ENODEV;
191 }
192
193 if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
194 return 0;
195
196 if (drm->device.info.chipset <= 0xa0 ||
197 drm->device.info.chipset == 0xaa ||
198 drm->device.info.chipset == 0xac)
199 ops = &nv50_bl_ops;
200 else
201 ops = &nva3_bl_ops;
202
203 memset(&props, 0, sizeof(struct backlight_properties));
204 props.type = BACKLIGHT_RAW;
205 props.max_brightness = 100;
206 bd = backlight_device_register("nv_backlight", connector->kdev,
207 nv_encoder, ops, &props);
208 if (IS_ERR(bd))
209 return PTR_ERR(bd);
210
211 drm->backlight = bd;
212 bd->props.brightness = bd->ops->get_brightness(bd);
213 backlight_update_status(bd);
214 return 0;
215}
216
217int
218nouveau_backlight_init(struct drm_device *dev)
219{
220 struct nouveau_drm *drm = nouveau_drm(dev);
221 struct nvif_device *device = &drm->device;
222 struct drm_connector *connector;
223
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
229 switch (device->info.family) {
230 case NV_DEVICE_INFO_V0_CURIE:
231 return nv40_backlight_init(connector);
232 case NV_DEVICE_INFO_V0_TESLA:
233 case NV_DEVICE_INFO_V0_FERMI:
234 case NV_DEVICE_INFO_V0_KEPLER:
235 return nv50_backlight_init(connector);
236 default:
237 break;
238 }
239 }
240
241
242 return 0;
243}
244
245void
246nouveau_backlight_exit(struct drm_device *dev)
247{
248 struct nouveau_drm *drm = nouveau_drm(dev);
249
250 if (drm->backlight) {
251 backlight_device_unregister(drm->backlight);
252 drm->backlight = NULL;
253 }
254}