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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#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#include "nouveau_encoder.h"
41
42static int
43nv40_get_intensity(struct backlight_device *bd)
44{
45 struct drm_device *dev = bl_get_data(bd);
46 int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)
47 >> 16;
48
49 return val;
50}
51
52static int
53nv40_set_intensity(struct backlight_device *bd)
54{
55 struct drm_device *dev = bl_get_data(bd);
56 int val = bd->props.brightness;
57 int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT);
58
59 nv_wr32(dev, 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 drm_device *dev = connector->dev;
75 struct drm_nouveau_private *dev_priv = dev->dev_private;
76 struct backlight_properties props;
77 struct backlight_device *bd;
78
79 if (!(nv_rd32(dev, 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, dev,
86 &nv40_bl_ops, &props);
87 if (IS_ERR(bd))
88 return PTR_ERR(bd);
89
90 dev_priv->backlight = bd;
91 bd->props.brightness = nv40_get_intensity(bd);
92 backlight_update_status(bd);
93
94 return 0;
95}
96
97static int
98nv50_get_intensity(struct backlight_device *bd)
99{
100 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
101 struct drm_device *dev = nv_encoder->base.base.dev;
102 int or = nv_encoder->or;
103 u32 div = 1025;
104 u32 val;
105
106 val = nv_rd32(dev, 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 drm_device *dev = nv_encoder->base.base.dev;
116 int or = nv_encoder->or;
117 u32 div = 1025;
118 u32 val = (bd->props.brightness * div) / 100;
119
120 nv_wr32(dev, 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 drm_device *dev = nv_encoder->base.base.dev;
136 int or = nv_encoder->or;
137 u32 div, val;
138
139 div = nv_rd32(dev, NV50_PDISP_SOR_PWM_DIV(or));
140 val = nv_rd32(dev, NV50_PDISP_SOR_PWM_CTL(or));
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
148static int
149nva3_set_intensity(struct backlight_device *bd)
150{
151 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
152 struct drm_device *dev = nv_encoder->base.base.dev;
153 int or = nv_encoder->or;
154 u32 div, val;
155
156 div = nv_rd32(dev, NV50_PDISP_SOR_PWM_DIV(or));
157 val = (bd->props.brightness * div) / 100;
158 if (div) {
159 nv_wr32(dev, NV50_PDISP_SOR_PWM_CTL(or), val |
160 NV50_PDISP_SOR_PWM_CTL_NEW |
161 NVA3_PDISP_SOR_PWM_CTL_UNK);
162 return 0;
163 }
164
165 return -EINVAL;
166}
167
168static const struct backlight_ops nva3_bl_ops = {
169 .options = BL_CORE_SUSPENDRESUME,
170 .get_brightness = nva3_get_intensity,
171 .update_status = nva3_set_intensity,
172};
173
174static int
175nv50_backlight_init(struct drm_connector *connector)
176{
177 struct drm_device *dev = connector->dev;
178 struct drm_nouveau_private *dev_priv = dev->dev_private;
179 struct nouveau_encoder *nv_encoder;
180 struct backlight_properties props;
181 struct backlight_device *bd;
182 const struct backlight_ops *ops;
183
184 nv_encoder = find_encoder(connector, OUTPUT_LVDS);
185 if (!nv_encoder) {
186 nv_encoder = find_encoder(connector, OUTPUT_DP);
187 if (!nv_encoder)
188 return -ENODEV;
189 }
190
191 if (!nv_rd32(dev, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
192 return 0;
193
194 if (dev_priv->chipset <= 0xa0 ||
195 dev_priv->chipset == 0xaa ||
196 dev_priv->chipset == 0xac)
197 ops = &nv50_bl_ops;
198 else
199 ops = &nva3_bl_ops;
200
201 memset(&props, 0, sizeof(struct backlight_properties));
202 props.type = BACKLIGHT_RAW;
203 props.max_brightness = 100;
204 bd = backlight_device_register("nv_backlight", &connector->kdev,
205 nv_encoder, ops, &props);
206 if (IS_ERR(bd))
207 return PTR_ERR(bd);
208
209 dev_priv->backlight = bd;
210 bd->props.brightness = bd->ops->get_brightness(bd);
211 backlight_update_status(bd);
212 return 0;
213}
214
215int
216nouveau_backlight_init(struct drm_device *dev)
217{
218 struct drm_nouveau_private *dev_priv = dev->dev_private;
219 struct drm_connector *connector;
220
221#ifdef CONFIG_ACPI
222 if (acpi_video_backlight_support()) {
223 NV_INFO(dev, "ACPI backlight interface available, "
224 "not registering our own\n");
225 return 0;
226 }
227#endif
228
229 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
230 if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
231 connector->connector_type != DRM_MODE_CONNECTOR_eDP)
232 continue;
233
234 switch (dev_priv->card_type) {
235 case NV_40:
236 return nv40_backlight_init(connector);
237 case NV_50:
238 return nv50_backlight_init(connector);
239 default:
240 break;
241 }
242 }
243
244
245 return 0;
246}
247
248void
249nouveau_backlight_exit(struct drm_device *dev)
250{
251 struct drm_nouveau_private *dev_priv = dev->dev_private;
252
253 if (dev_priv->backlight) {
254 backlight_device_unregister(dev_priv->backlight);
255 dev_priv->backlight = NULL;
256 }
257}