2 * Copyright (C) 2009 Red Hat <mjg@redhat.com>
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:
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.
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.
28 * Matthew Garrett <mjg@redhat.com>
30 * Register locations derived from NVClock by Roderick Colenbrander
33 #include <linux/backlight.h>
35 #include "nouveau_drm.h"
36 #include "nouveau_reg.h"
37 #include "nouveau_encoder.h"
40 nv40_get_intensity(struct backlight_device *bd)
42 struct nouveau_drm *drm = bl_get_data(bd);
43 struct nouveau_device *device = nv_device(drm->device);
44 int val = (nv_rd32(device, NV40_PMC_BACKLIGHT) &
45 NV40_PMC_BACKLIGHT_MASK) >> 16;
51 nv40_set_intensity(struct backlight_device *bd)
53 struct nouveau_drm *drm = bl_get_data(bd);
54 struct nouveau_device *device = nv_device(drm->device);
55 int val = bd->props.brightness;
56 int reg = nv_rd32(device, NV40_PMC_BACKLIGHT);
58 nv_wr32(device, NV40_PMC_BACKLIGHT,
59 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
64 static const struct backlight_ops nv40_bl_ops = {
65 .options = BL_CORE_SUSPENDRESUME,
66 .get_brightness = nv40_get_intensity,
67 .update_status = nv40_set_intensity,
71 nv40_backlight_init(struct drm_connector *connector)
73 struct nouveau_drm *drm = nouveau_drm(connector->dev);
74 struct nouveau_device *device = nv_device(drm->device);
75 struct backlight_properties props;
76 struct backlight_device *bd;
78 if (!(nv_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
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);
89 bd->props.brightness = nv40_get_intensity(bd);
90 backlight_update_status(bd);
96 nv50_get_intensity(struct backlight_device *bd)
98 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
99 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
100 struct nouveau_device *device = nv_device(drm->device);
101 int or = nv_encoder->or;
105 val = nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
106 val &= NV50_PDISP_SOR_PWM_CTL_VAL;
107 return ((val * 100) + (div / 2)) / div;
111 nv50_set_intensity(struct backlight_device *bd)
113 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
114 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
115 struct nouveau_device *device = nv_device(drm->device);
116 int or = nv_encoder->or;
118 u32 val = (bd->props.brightness * div) / 100;
120 nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
121 NV50_PDISP_SOR_PWM_CTL_NEW | val);
125 static const struct backlight_ops nv50_bl_ops = {
126 .options = BL_CORE_SUSPENDRESUME,
127 .get_brightness = nv50_get_intensity,
128 .update_status = nv50_set_intensity,
132 nva3_get_intensity(struct backlight_device *bd)
134 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
135 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
136 struct nouveau_device *device = nv_device(drm->device);
137 int or = nv_encoder->or;
140 div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
141 val = nv_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;
150 nva3_set_intensity(struct backlight_device *bd)
152 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
153 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
154 struct nouveau_device *device = nv_device(drm->device);
155 int or = nv_encoder->or;
158 div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
159 val = (bd->props.brightness * div) / 100;
161 nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val |
162 NV50_PDISP_SOR_PWM_CTL_NEW |
163 NVA3_PDISP_SOR_PWM_CTL_UNK);
170 static const struct backlight_ops nva3_bl_ops = {
171 .options = BL_CORE_SUSPENDRESUME,
172 .get_brightness = nva3_get_intensity,
173 .update_status = nva3_set_intensity,
177 nv50_backlight_init(struct drm_connector *connector)
179 struct nouveau_drm *drm = nouveau_drm(connector->dev);
180 struct nouveau_device *device = nv_device(drm->device);
181 struct nouveau_encoder *nv_encoder;
182 struct backlight_properties props;
183 struct backlight_device *bd;
184 const struct backlight_ops *ops;
186 nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
188 nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
193 if (!nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
196 if (device->chipset <= 0xa0 ||
197 device->chipset == 0xaa ||
198 device->chipset == 0xac)
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);
212 bd->props.brightness = bd->ops->get_brightness(bd);
213 backlight_update_status(bd);
218 nouveau_backlight_init(struct drm_device *dev)
220 struct nouveau_drm *drm = nouveau_drm(dev);
221 struct nouveau_device *device = nv_device(drm->device);
222 struct drm_connector *connector;
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)
229 switch (device->card_type) {
231 return nv40_backlight_init(connector);
236 return nv50_backlight_init(connector);
247 nouveau_backlight_exit(struct drm_device *dev)
249 struct nouveau_drm *drm = nouveau_drm(dev);
251 if (drm->backlight) {
252 backlight_device_unregister(drm->backlight);
253 drm->backlight = NULL;