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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/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#include "nouveau_acpi.h"
42
43static struct ida bl_ida;
44#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'
45
46static bool
47nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],
48 struct nouveau_backlight *bl)
49{
50 const int nb = ida_alloc_max(&bl_ida, 99, GFP_KERNEL);
51
52 if (nb < 0)
53 return false;
54 if (nb > 0)
55 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
56 else
57 snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
58 bl->id = nb;
59 return true;
60}
61
62static int
63nv40_get_intensity(struct backlight_device *bd)
64{
65 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
66 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
67 struct nvif_object *device = &drm->client.device.object;
68 int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
69 NV40_PMC_BACKLIGHT_MASK) >> 16;
70
71 return val;
72}
73
74static int
75nv40_set_intensity(struct backlight_device *bd)
76{
77 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
78 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
79 struct nvif_object *device = &drm->client.device.object;
80 int val = bd->props.brightness;
81 int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
82
83 nvif_wr32(device, NV40_PMC_BACKLIGHT,
84 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
85
86 return 0;
87}
88
89static const struct backlight_ops nv40_bl_ops = {
90 .options = BL_CORE_SUSPENDRESUME,
91 .get_brightness = nv40_get_intensity,
92 .update_status = nv40_set_intensity,
93};
94
95static int
96nv40_backlight_init(struct nouveau_encoder *encoder,
97 struct backlight_properties *props,
98 const struct backlight_ops **ops)
99{
100 struct nouveau_drm *drm = nouveau_drm(encoder->base.base.dev);
101 struct nvif_object *device = &drm->client.device.object;
102
103 if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
104 return -ENODEV;
105
106 props->max_brightness = 31;
107 *ops = &nv40_bl_ops;
108 return 0;
109}
110
111static int
112nv50_get_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 nvif_object *device = &drm->client.device.object;
117 int or = ffs(nv_encoder->dcb->or) - 1;
118 u32 div = 1025;
119 u32 val;
120
121 val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
122 val &= NV50_PDISP_SOR_PWM_CTL_VAL;
123 return ((val * 100) + (div / 2)) / div;
124}
125
126static int
127nv50_set_intensity(struct backlight_device *bd)
128{
129 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
130 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
131 struct nvif_object *device = &drm->client.device.object;
132 int or = ffs(nv_encoder->dcb->or) - 1;
133 u32 div = 1025;
134 u32 val = (bd->props.brightness * div) / 100;
135
136 nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
137 NV50_PDISP_SOR_PWM_CTL_NEW | val);
138 return 0;
139}
140
141static const struct backlight_ops nv50_bl_ops = {
142 .options = BL_CORE_SUSPENDRESUME,
143 .get_brightness = nv50_get_intensity,
144 .update_status = nv50_set_intensity,
145};
146
147/*
148 * eDP brightness callbacks need to happen under lock, since we need to
149 * enable/disable the backlight ourselves for modesets
150 */
151static int
152nv50_edp_get_brightness(struct backlight_device *bd)
153{
154 struct drm_connector *connector = dev_get_drvdata(bd->dev.parent);
155 struct drm_device *dev = connector->dev;
156 struct drm_crtc *crtc;
157 struct drm_modeset_acquire_ctx ctx;
158 int ret = 0;
159
160 drm_modeset_acquire_init(&ctx, 0);
161
162retry:
163 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
164 if (ret == -EDEADLK)
165 goto deadlock;
166 else if (ret < 0)
167 goto out;
168
169 crtc = connector->state->crtc;
170 if (!crtc)
171 goto out;
172
173 ret = drm_modeset_lock(&crtc->mutex, &ctx);
174 if (ret == -EDEADLK)
175 goto deadlock;
176 else if (ret < 0)
177 goto out;
178
179 if (!crtc->state->active)
180 goto out;
181
182 ret = bd->props.brightness;
183out:
184 drm_modeset_drop_locks(&ctx);
185 drm_modeset_acquire_fini(&ctx);
186 return ret;
187deadlock:
188 drm_modeset_backoff(&ctx);
189 goto retry;
190}
191
192static int
193nv50_edp_set_brightness(struct backlight_device *bd)
194{
195 struct drm_connector *connector = dev_get_drvdata(bd->dev.parent);
196 struct nouveau_connector *nv_connector = nouveau_connector(connector);
197 struct drm_device *dev = connector->dev;
198 struct drm_crtc *crtc;
199 struct drm_dp_aux *aux = &nv_connector->aux;
200 struct nouveau_backlight *nv_bl = nv_connector->backlight;
201 struct drm_modeset_acquire_ctx ctx;
202 int ret = 0;
203
204 drm_modeset_acquire_init(&ctx, 0);
205retry:
206 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
207 if (ret == -EDEADLK)
208 goto deadlock;
209 else if (ret < 0)
210 goto out;
211
212 crtc = connector->state->crtc;
213 if (!crtc)
214 goto out;
215
216 ret = drm_modeset_lock(&crtc->mutex, &ctx);
217 if (ret == -EDEADLK)
218 goto deadlock;
219 else if (ret < 0)
220 goto out;
221
222 if (crtc->state->active)
223 ret = drm_edp_backlight_set_level(aux, &nv_bl->edp_info, bd->props.brightness);
224
225out:
226 drm_modeset_drop_locks(&ctx);
227 drm_modeset_acquire_fini(&ctx);
228 return ret;
229deadlock:
230 drm_modeset_backoff(&ctx);
231 goto retry;
232}
233
234static const struct backlight_ops nv50_edp_bl_ops = {
235 .get_brightness = nv50_edp_get_brightness,
236 .update_status = nv50_edp_set_brightness,
237};
238
239static int
240nva3_get_intensity(struct backlight_device *bd)
241{
242 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
243 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
244 struct nvif_object *device = &drm->client.device.object;
245 int or = ffs(nv_encoder->dcb->or) - 1;
246 u32 div, val;
247
248 div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
249 val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
250 val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
251 if (div && div >= val)
252 return ((val * 100) + (div / 2)) / div;
253
254 return 100;
255}
256
257static int
258nva3_set_intensity(struct backlight_device *bd)
259{
260 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
261 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
262 struct nvif_object *device = &drm->client.device.object;
263 int or = ffs(nv_encoder->dcb->or) - 1;
264 u32 div, val;
265
266 div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
267
268 val = backlight_get_brightness(bd);
269 if (val)
270 val = (val * div) / 100;
271
272 if (div) {
273 nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
274 val |
275 NV50_PDISP_SOR_PWM_CTL_NEW |
276 NVA3_PDISP_SOR_PWM_CTL_UNK);
277 return 0;
278 }
279
280 return -EINVAL;
281}
282
283static const struct backlight_ops nva3_bl_ops = {
284 .options = BL_CORE_SUSPENDRESUME,
285 .get_brightness = nva3_get_intensity,
286 .update_status = nva3_set_intensity,
287};
288
289/* FIXME: perform backlight probing for eDP _before_ this, this only gets called after connector
290 * registration which happens after the initial modeset
291 */
292static int
293nv50_backlight_init(struct nouveau_backlight *bl,
294 struct nouveau_connector *nv_conn,
295 struct nouveau_encoder *nv_encoder,
296 struct backlight_properties *props,
297 const struct backlight_ops **ops)
298{
299 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
300 struct nvif_object *device = &drm->client.device.object;
301
302 if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1)) ||
303 nv_conn->base.status != connector_status_connected)
304 return -ENODEV;
305
306 if (nv_conn->type == DCB_CONNECTOR_eDP) {
307 int ret;
308 u16 current_level;
309 u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE];
310 u8 current_mode;
311
312 ret = drm_dp_dpcd_read(&nv_conn->aux, DP_EDP_DPCD_REV, edp_dpcd,
313 EDP_DISPLAY_CTL_CAP_SIZE);
314 if (ret < 0)
315 return ret;
316
317 /* TODO: Add support for hybrid PWM/DPCD panels */
318 if (drm_edp_backlight_supported(edp_dpcd) &&
319 (edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP) &&
320 (edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP)) {
321 NV_DEBUG(drm, "DPCD backlight controls supported on %s\n",
322 nv_conn->base.name);
323
324 ret = drm_edp_backlight_init(&nv_conn->aux, &bl->edp_info, 0, edp_dpcd,
325 ¤t_level, ¤t_mode);
326 if (ret < 0)
327 return ret;
328
329 ret = drm_edp_backlight_enable(&nv_conn->aux, &bl->edp_info, current_level);
330 if (ret < 0) {
331 NV_ERROR(drm, "Failed to enable backlight on %s: %d\n",
332 nv_conn->base.name, ret);
333 return ret;
334 }
335
336 *ops = &nv50_edp_bl_ops;
337 props->brightness = current_level;
338 props->max_brightness = bl->edp_info.max;
339 bl->uses_dpcd = true;
340 return 0;
341 }
342 }
343
344 if (drm->client.device.info.chipset <= 0xa0 ||
345 drm->client.device.info.chipset == 0xaa ||
346 drm->client.device.info.chipset == 0xac)
347 *ops = &nv50_bl_ops;
348 else
349 *ops = &nva3_bl_ops;
350
351 props->max_brightness = 100;
352
353 return 0;
354}
355
356int
357nouveau_backlight_init(struct drm_connector *connector)
358{
359 struct nouveau_drm *drm = nouveau_drm(connector->dev);
360 struct nouveau_backlight *bl;
361 struct nouveau_encoder *nv_encoder = NULL;
362 struct nvif_device *device = &drm->client.device;
363 char backlight_name[BL_NAME_SIZE];
364 struct backlight_properties props = {0};
365 const struct backlight_ops *ops;
366 int ret;
367
368 if (apple_gmux_present()) {
369 NV_INFO_ONCE(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
370 return 0;
371 }
372
373 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
374 nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
375 else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
376 nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
377 else
378 return 0;
379
380 if (!nv_encoder)
381 return 0;
382
383 bl = kzalloc(sizeof(*bl), GFP_KERNEL);
384 if (!bl)
385 return -ENOMEM;
386
387 switch (device->info.family) {
388 case NV_DEVICE_INFO_V0_CURIE:
389 ret = nv40_backlight_init(nv_encoder, &props, &ops);
390 break;
391 case NV_DEVICE_INFO_V0_TESLA:
392 case NV_DEVICE_INFO_V0_FERMI:
393 case NV_DEVICE_INFO_V0_KEPLER:
394 case NV_DEVICE_INFO_V0_MAXWELL:
395 case NV_DEVICE_INFO_V0_PASCAL:
396 case NV_DEVICE_INFO_V0_VOLTA:
397 case NV_DEVICE_INFO_V0_TURING:
398 case NV_DEVICE_INFO_V0_AMPERE: //XXX: not confirmed
399 ret = nv50_backlight_init(bl, nouveau_connector(connector),
400 nv_encoder, &props, &ops);
401 break;
402 default:
403 ret = 0;
404 goto fail_alloc;
405 }
406
407 if (ret) {
408 if (ret == -ENODEV)
409 ret = 0;
410 goto fail_alloc;
411 }
412
413 if (!nouveau_acpi_video_backlight_use_native()) {
414 NV_INFO(drm, "Skipping nv_backlight registration\n");
415 goto fail_alloc;
416 }
417
418 if (!nouveau_get_backlight_name(backlight_name, bl)) {
419 NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
420 goto fail_alloc;
421 }
422
423 props.type = BACKLIGHT_RAW;
424 bl->dev = backlight_device_register(backlight_name, connector->kdev,
425 nv_encoder, ops, &props);
426 if (IS_ERR(bl->dev)) {
427 if (bl->id >= 0)
428 ida_free(&bl_ida, bl->id);
429 ret = PTR_ERR(bl->dev);
430 goto fail_alloc;
431 }
432
433 nouveau_connector(connector)->backlight = bl;
434 if (!bl->dev->props.brightness)
435 bl->dev->props.brightness =
436 bl->dev->ops->get_brightness(bl->dev);
437 backlight_update_status(bl->dev);
438
439 return 0;
440
441fail_alloc:
442 kfree(bl);
443 /*
444 * If we get here we have an internal panel, but no nv_backlight,
445 * try registering an ACPI video backlight device instead.
446 */
447 if (ret == 0)
448 nouveau_acpi_video_register_backlight();
449
450 return ret;
451}
452
453void
454nouveau_backlight_fini(struct drm_connector *connector)
455{
456 struct nouveau_connector *nv_conn = nouveau_connector(connector);
457 struct nouveau_backlight *bl = nv_conn->backlight;
458
459 if (!bl)
460 return;
461
462 if (bl->id >= 0)
463 ida_free(&bl_ida, bl->id);
464
465 backlight_device_unregister(bl->dev);
466 nv_conn->backlight = NULL;
467 kfree(bl);
468}
469
470void
471nouveau_backlight_ctor(void)
472{
473 ida_init(&bl_ida);
474}
475
476void
477nouveau_backlight_dtor(void)
478{
479 ida_destroy(&bl_ida);
480}