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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/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 case NV_DEVICE_INFO_V0_AMPERE: //XXX: not confirmed
260 ret = nv50_backlight_init(nv_encoder, &props, &ops);
261 break;
262 default:
263 return 0;
264 }
265
266 if (ret == -ENODEV)
267 return 0;
268 else if (ret)
269 return ret;
270
271 bl = kzalloc(sizeof(*bl), GFP_KERNEL);
272 if (!bl)
273 return -ENOMEM;
274
275 if (!nouveau_get_backlight_name(backlight_name, bl)) {
276 NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
277 goto fail_alloc;
278 }
279
280 bl->dev = backlight_device_register(backlight_name, connector->kdev,
281 nv_encoder, ops, &props);
282 if (IS_ERR(bl->dev)) {
283 if (bl->id >= 0)
284 ida_simple_remove(&bl_ida, bl->id);
285 ret = PTR_ERR(bl->dev);
286 goto fail_alloc;
287 }
288
289 nouveau_connector(connector)->backlight = bl;
290 bl->dev->props.brightness = bl->dev->ops->get_brightness(bl->dev);
291 backlight_update_status(bl->dev);
292
293 return 0;
294
295fail_alloc:
296 kfree(bl);
297 return ret;
298}
299
300void
301nouveau_backlight_fini(struct drm_connector *connector)
302{
303 struct nouveau_connector *nv_conn = nouveau_connector(connector);
304 struct nouveau_backlight *bl = nv_conn->backlight;
305
306 if (!bl)
307 return;
308
309 if (bl->id >= 0)
310 ida_simple_remove(&bl_ida, bl->id);
311
312 backlight_device_unregister(bl->dev);
313 nv_conn->backlight = NULL;
314 kfree(bl);
315}
316
317void
318nouveau_backlight_ctor(void)
319{
320 ida_init(&bl_ida);
321}
322
323void
324nouveau_backlight_dtor(void)
325{
326 ida_destroy(&bl_ida);
327}