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>
34 #include <linux/acpi.h>
36 #include "nouveau_drm.h"
37 #include "nouveau_reg.h"
38 #include "nouveau_encoder.h"
41 nv40_get_intensity(struct backlight_device *bd)
43 struct nouveau_drm *drm = bl_get_data(bd);
44 struct nouveau_device *device = nv_device(drm->device);
45 int val = (nv_rd32(device, NV40_PMC_BACKLIGHT) &
46 NV40_PMC_BACKLIGHT_MASK) >> 16;
52 nv40_set_intensity(struct backlight_device *bd)
54 struct nouveau_drm *drm = bl_get_data(bd);
55 struct nouveau_device *device = nv_device(drm->device);
56 int val = bd->props.brightness;
57 int reg = nv_rd32(device, NV40_PMC_BACKLIGHT);
59 nv_wr32(device, NV40_PMC_BACKLIGHT,
60 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
65 static const struct backlight_ops nv40_bl_ops = {
66 .options = BL_CORE_SUSPENDRESUME,
67 .get_brightness = nv40_get_intensity,
68 .update_status = nv40_set_intensity,
72 nv40_backlight_init(struct drm_connector *connector)
74 struct nouveau_drm *drm = nouveau_drm(connector->dev);
75 struct nouveau_device *device = nv_device(drm->device);
76 struct backlight_properties props;
77 struct backlight_device *bd;
79 if (!(nv_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
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, drm,
86 &nv40_bl_ops, &props);
88 bd->props.brightness = nv40_get_intensity(bd);
89 backlight_update_status(bd);
95 nv50_get_intensity(struct backlight_device *bd)
97 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
98 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
99 struct nouveau_device *device = nv_device(drm->device);
100 int or = nv_encoder->or;
104 val = nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
105 val &= NV50_PDISP_SOR_PWM_CTL_VAL;
106 return ((val * 100) + (div / 2)) / div;
110 nv50_set_intensity(struct backlight_device *bd)
112 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
113 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
114 struct nouveau_device *device = nv_device(drm->device);
115 int or = nv_encoder->or;
117 u32 val = (bd->props.brightness * div) / 100;
119 nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
120 NV50_PDISP_SOR_PWM_CTL_NEW | val);
124 static const struct backlight_ops nv50_bl_ops = {
125 .options = BL_CORE_SUSPENDRESUME,
126 .get_brightness = nv50_get_intensity,
127 .update_status = nv50_set_intensity,
131 nva3_get_intensity(struct backlight_device *bd)
133 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
134 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
135 struct nouveau_device *device = nv_device(drm->device);
136 int or = nv_encoder->or;
139 div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
140 val = nv_rd32(device, 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;
149 nva3_set_intensity(struct backlight_device *bd)
151 struct nouveau_encoder *nv_encoder = bl_get_data(bd);
152 struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
153 struct nouveau_device *device = nv_device(drm->device);
154 int or = nv_encoder->or;
157 div = nv_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
158 val = (bd->props.brightness * div) / 100;
160 nv_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val |
161 NV50_PDISP_SOR_PWM_CTL_NEW |
162 NVA3_PDISP_SOR_PWM_CTL_UNK);
169 static const struct backlight_ops nva3_bl_ops = {
170 .options = BL_CORE_SUSPENDRESUME,
171 .get_brightness = nva3_get_intensity,
172 .update_status = nva3_set_intensity,
176 nv50_backlight_init(struct drm_connector *connector)
178 struct nouveau_drm *drm = nouveau_drm(connector->dev);
179 struct nouveau_device *device = nv_device(drm->device);
180 struct nouveau_encoder *nv_encoder;
181 struct backlight_properties props;
182 struct backlight_device *bd;
183 const struct backlight_ops *ops;
185 nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
187 nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
192 if (!nv_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
195 if (device->chipset <= 0xa0 ||
196 device->chipset == 0xaa ||
197 device->chipset == 0xac)
202 memset(&props, 0, sizeof(struct backlight_properties));
203 props.type = BACKLIGHT_RAW;
204 props.max_brightness = 100;
205 bd = backlight_device_register("nv_backlight", &connector->kdev,
206 nv_encoder, ops, &props);
211 bd->props.brightness = bd->ops->get_brightness(bd);
212 backlight_update_status(bd);
217 nouveau_backlight_init(struct drm_device *dev)
219 struct nouveau_drm *drm = nouveau_drm(dev);
220 struct nouveau_device *device = nv_device(drm->device);
221 struct drm_connector *connector;
224 if (acpi_video_backlight_support()) {
225 NV_INFO(drm, "ACPI backlight interface available, "
226 "not registering our own\n");
231 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
232 if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
233 connector->connector_type != DRM_MODE_CONNECTOR_eDP)
236 switch (device->card_type) {
238 return nv40_backlight_init(connector);
240 return nv50_backlight_init(connector);
251 nouveau_backlight_exit(struct drm_device *dev)
253 struct nouveau_drm *drm = nouveau_drm(dev);
255 if (drm->backlight) {
256 backlight_device_unregister(drm->backlight);
257 drm->backlight = NULL;