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
;